WO2017222330A1 - 재조합 단쇄 fviii 및 그 화학 접합물 - Google Patents
재조합 단쇄 fviii 및 그 화학 접합물 Download PDFInfo
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- WO2017222330A1 WO2017222330A1 PCT/KR2017/006633 KR2017006633W WO2017222330A1 WO 2017222330 A1 WO2017222330 A1 WO 2017222330A1 KR 2017006633 W KR2017006633 W KR 2017006633W WO 2017222330 A1 WO2017222330 A1 WO 2017222330A1
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- A61K47/59—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyureas or polyurethanes
- A61K47/60—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyureas or polyurethanes the organic macromolecular compound being a polyoxyalkylene oligomer, polymer or dendrimer, e.g. PEG, PPG, PEO or polyglycerol
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P7/00—Drugs for disorders of the blood or the extracellular fluid
- A61P7/04—Antihaemorrhagics; Procoagulants; Haemostatic agents; Antifibrinolytic agents
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
- C07K1/107—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length by chemical modification of precursor peptides
- C07K1/113—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length by chemical modification of precursor peptides without change of the primary structure
- C07K1/1133—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length by chemical modification of precursor peptides without change of the primary structure by redox-reactions involving cystein/cystin side chains
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/745—Blood coagulation or fibrinolysis factors
- C07K14/755—Factors VIII, e.g. factor VIII C (AHF), factor VIII Ag (VWF)
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K19/00—Hybrid peptides, i.e. peptides covalently bound to nucleic acids, or non-covalently bound protein-protein complexes
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P21/00—Preparation of peptides or proteins
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
Definitions
- the present application is directed to recombinant short chain FVIII protein production techniques and chemical conjugates thereof for use in the treatment of hemophilia.
- Hemophilia is a disease in which bleeding continues due to lack of coagulation factors.
- Blood clotting factors consist of I to XIII, of which the factors associated with hemophilia are VIII, IX and XI. Hemophilia is caused by a genetic defect of each of the above factors, and hemoglobin A is classified into hemophilia A lacking Factor VIII, hemophilia B lacking Factor IX and hemophilia C lacking Factor XI, among which hemophilia A is about 80 Account for -85%.
- hemophilia treatment is hemostasis and treatment is carried out in two ways, either prophylactically or on demand using Enzyme Replacement Therapy (ERT). .
- ERT Enzyme Replacement Therapy
- PEGylated FVIII which PEGylates FVIII to reduce binding to low density lipoprotein receptor related protein (LRP1), which is known to be responsible for in vivo clearance of FVIII, thereby preventing loss of FVIII.
- LRP1 low density lipoprotein receptor related protein
- FVIII-Fc FVIII-Fc fusion protein fused to the F-terminus of the antibody at the C-terminus of FVIII. Due to circulation in the body by FcRn, the half-life of FVIII is longer than that of FVIII, but FVIII-Fc is Due to the combination with vWF, the residence time in the body was dominated by the half-life of vWF.
- FVIII-mimetic bi-specific antibody which is an intact IgG form of bispecific antibody containing two types of Fab specific to FIX (or activated FIX) and FX, designed to replace the function of FVIII in the body ( Kitazawa et al, Nature medicine 2012 18 (10): 1570-4.).
- TFPI anti-issue factor pathway inhibitors
- Korean Unexamined Patent Publication No. 2014-0114266 discloses anti-hemopathy factor VIII with increased specific activity.
- the present application seeks to provide short-chain FVIII with improved residence time in the body and easy mass production.
- the present disclosure includes a heavy region, a light chain and a portion of a B region fragment deleted from human coagulation factor 8 (Factor VIII), wherein the portion of the B region fragment lacking a cleavage site by purine protease.
- Factor VIII human coagulation factor 8
- At least 5 amino acids each in the N-terminal and C-terminal directions of the residue, including 1648 and 1649 residues of SEQ ID NO: 1, and partly deleted to include 4 to 6 glycosylation sites Phosphorus, short-chain clotting factor 8 (Factor VIII) is provided.
- the B region fragment included in the single-chain coagulation factor 8 of the present disclosure includes about 15% to 40% of the wild-type B domain sequence, but is not limited thereto as long as the effect according to the present disclosure is achieved. .
- Those skilled in the art can select an appropriate single-chain coagulation factor 8 in consideration of the conditions of the B region fragment included in the above-mentioned short-chain coagulation factor 8 described above.
- the B region is interpreted to include an a3 region as described later.
- a portion deleted from a region B deleted from a portion that satisfies the above condition may be continuous or discontinuous, and the region B deleted from the region based on the sequence of SEQ ID NO. Based on the sequence of No. 1 (i) amino acid residues 741 to 902 and 1654 to 1689; (ii) amino acid sequences of amino acid residues 741 to 965 and 1654 to 1689; Or (iii) amino acid residues 741-902, 1637-1642 and 1654-1689.
- the single-chain coagulation factor 8 of the present application includes an amino acid sequence represented by SEQ ID NO: 2 to 7 or a sequence having about 90% or more homology thereto, and the method of determining homology described below. And the disclosure of factors and biological function equality according to the present disclosure may be appropriately determined.
- the nucleic acid molecule encoding the single-chain coagulation factor 8 having the amino acid sequence represented by SEQ ID NOs: 2 to 7 is represented by SEQ ID NOs: 10 to 15, or the nucleic acid sequence is expressed in a cell. Also included are those substituted with codon optimized sequences or variants with nucleic acid sequences due to degenerate codons.
- the single-chain coagulation factor 8 according to the present invention is 90% or more of the double-chain coagulation factor inactivation measured by the CS or APTT method.
- the present invention is conjugated with a hydrophilic polymer, such as a polymer comprising polyethylene glycol, polyethylene oxide, dextran or polysialic, and when PEG is used, it may be via acryloyl, sulfone or maleimide at the conjugation position. Can be spliced.
- a hydrophilic polymer such as a polymer comprising polyethylene glycol, polyethylene oxide, dextran or polysialic, and when PEG is used, it may be via acryloyl, sulfone or maleimide at the conjugation position. Can be spliced.
- the conjugated coagulation factor 8 is conjugated with a hydrophilic polymer at some amino acid residues of the A region and / or the B region fragment, and the conjugated position is the sequence of SEQ ID NO: 1 in the B region. At least one position selected from the group consisting of amino acid residues 754, 781, 782, 788, 789, 825 and 897; At least one position selected from the group consisting of amino acid residues 491, 495, 498 and 1806 based on the sequence of SEQ ID NO: 1 in the A-region, wherein the residue at the conjugated position is for conjugation with the hydrophilic polymer It may be substituted with cysteine.
- conjugated with PEG in particular PEG with an average molecular weight of at least 20 kDa is used.
- the application is also directed to the short chain hemagglutination factor 8 according to the invention, in particular to the short chain hemagglutination factor 8 represented by SEQ ID NOS: 2 to 7, or to the region B of the sequence B for conjugation with a hydrophilic polymer in said amino acid sequence.
- a nucleic acid molecule encoding a single-chain clotting factor 8 containing a cysteine group is provided.
- the residues into which cysteine is introduced are shown in Table 3, and the nucleic acid molecules whose residues are substituted with cysteine for conjugation with a hydrophilic polymer are represented by SEQ ID NOs: 17 to 32, and corresponding amino acids.
- the sequence is represented by SEQ ID NOs: 33-48. Also included are those in which the nucleic acid sequence has been replaced with a codon optimized sequence for expression in a cell or the nucleic acid sequence due to degenerate codons is mutated.
- the present disclosure also provides a vector comprising a nucleic acid molecule according to the present application, a cell comprising the vector.
- the present invention also provides a method of producing a single-chain blood coagulation factor 8 using a vector or a cell according to the present invention
- the method according to the present invention comprises the steps of transferring the vector according to the present application to eukaryotic cells, Or optionally providing a cell to which a vector according to the present invention has been delivered: expressing the cells in a single chain FVIII form in which the cysteine introduced through the culture in the culture medium is free thiol group masked by disulfide bonds by cysteine or glutathione. step; Collecting short-chain FVIII expressed from the culture solution and treating it with a reducing agent to release masked cysteine or glutathione; And treating the treated culture solution with PEGylated buffer solution.
- the present invention also provides a blood coagulation kit for use in a hemophilia patient or any patient in need of blood coagulation comprising any of the short chain coagulation 8 factors disclosed herein, including the claims, hemophilia of the short chain coagulation factor 8
- a therapeutic coagulation method comprising administering a therapeutic use or composition, or a short-chain coagulation factor 8, to a hemophilia patient or a patient in need of coagulation in a therapeutically effective amount.
- Single-chain FVIII is a light chain and heavy chain, which is linked to the B-domain lacking some sequences, in particular does not include a cleavage site cleaved by furin protease that occurs during normal FVIII expression process, at least 4 It includes the B region partially deleted to include the site.
- the short-chain coagulation factor 8 (Factor VIII) or some residues of the A or B region according to the present invention are pegylated short-chain coagulation factor 8, which are prepared in the form of short chains while maintaining the activity thereof, and thus easy to mass-produce.
- Figure 1 schematically shows a PEGylated short-chain FVIII structure according to an embodiment of the present application, 1648 residues indicate the cleavage position of furin.
- FIG. 2 schematically shows the production of short chain FVIII from full length FVIII according to one embodiment of the present application.
- Furin cleavage sites (the 1648 th amino acid sequence based on SEQ ID NO: 1) are indicated and the numbers in the figures represent each region corresponding to the indicated sites as amino acid residues.
- Figure 3 is a result of Western blot analysis of single-chain FVIII expression according to an embodiment of the present application.
- FIG 4 shows the PEGylation position tested for optimal PEGylation position of short chain FVIII according to one embodiment of the present disclosure.
- PK 7 is a test result comparing the pharmacokinetics (PK) of scFVIII with a commercially available FVIII material according to an embodiment of the present application.
- FIGS. 8A and 8B are schematic diagrams and experimental results for comparing the tail bleeding hemostatic efficacy test of PEGylated scFVIII with the efficacy of commercialized FVIII material, respectively, according to one embodiment of the present application.
- FIG. 8B PEG40kDa-scFVIII-B3 is shown.
- the present invention describes the development of a coagulation factor VIII variant that can be expressed in a short chain form with increased productivity and stability in the body, and the coagulation factor of the coagulation factor that improves the convenience of the patient's administration cycle through PEGylation of such a variant. Based on development.
- Coagulation factor 8 consists of the A1-A2-B-A3-C1-C2 regions and is synthesized as a short-chain protein in hepatocytes. After synthesis, it is processed and matured to form 280kDa heterodimer consisting of heavy and light chains.
- the light chain is 80kDa and is composed of A3-C1-C2 region
- the heavy chain is composed of A1-A2-B region
- the molecular weight is 90-200kDa, which has a large molecular weight difference due to the difference in the length and degree of glycation of the B region.
- the a1 domain between the A1 and A2 domains and the a2 and a3 domains between the A2 and B domains are included in the heavy chain.
- This heterodimer is present in the blood in an inactive state associated with vWF, and is cleaved by thrombin behind residues 372, 740 and 1689 upon exposure to stimuli such as vascular damage. As a result, it is separated from vWF and activated to form a trimer of A1, A2 and A3-C1-C2. The trimer then catalyzes the activation of FX by FIXa and is rapidly deactivated.
- Short-chain FVIII is reported to be structurally stable and to increase expression (see WO2004 / 067566).
- double-chain type FVIII there was reported a difference in expression according to the length of the B region (Miao et al ., Blood. 2004 May 1; 103 (9): 3412-9.).
- the present application is a single-chain FVIII in which the heavy and light chain regions of human coagulation factor (Factor VIII) are linked by a B-domain in which some sequences are deleted, in particular the B-domain in which the partial sequences are deleted is a protein. At least 5 amino acids are respectively deleted in the N-terminal and C-terminal directions, respectively, based on the 1648 and 1649 residue positions of SEQ ID NO: 1 so as not to include a cleavage site by a furin, and 4 to And a B region fragment partially deleted to contain six glycosylation sites.
- Factor VIII human coagulation factor
- Single chain FVIII comprises an A1-A2-B partially-A3-C1-C2 region.
- the residue positions and the sequences in FVIII of each region included herein are known and human amino acid sequences such as human FVIII can be represented by the sequence of SEQ ID NO: 1 with heavy chains comprising the A1 and A2 regions. 1-740 residues, the B region is 741-1689 residues, the light chain comprising the A3-, C1, and -C2 region is up to 1690-2332 residues (Fig. 2; and Orlova et al ., Acta Naturae. 2013 Apr- Jun; 5 (2): 19-39.
- Region B is referred to herein, including the a3 regions 1649-1689 described in FIG. 2.
- short-chain FVIII may be represented by the formula A1-A2-B'-A3-C1-C2, A1 is the A1 region, A2 is the A2 region, B 'is part of the B region, A3 is A3 region, C1 means C1 region, C2 means C2 region, each of which can be referred to above.
- the B region (B ′) which is partially deleted in the short chain FVIII according to the present invention is deleted from the protease furin cleavage site and in one embodiment includes 1648 and 1649 residues of SEQ ID NO: 1 and Deletions of at least five amino acids in each of the terminal and C-terminal directions.
- the deletion region of the B region is determined to include 4 to 6 glycosylation.
- the B region in which the furin cleavage region included in the short chain FVIII according to the present invention is deleted may be determined in a limit including about 15 to 40% of the total wild type B-domain.
- deletion site of the B region in which a part included in the short chain FVIII according to the present invention is deleted may be continuous or discontinuous.
- the FVIII amino acid sequence according to the present disclosure may be represented by SEQ ID NOs: 2 to 7.
- the recombinant FVIII disclosed herein is not limited to such sequences, but includes biologically equivalents thereof.
- Biological equivalents are those which have additional modifications to the amino acid sequences disclosed herein, but which have substantially the same activity as the polypeptides according to the invention, such modifications may, for example, delete, insert and / or substitute amino acid sequence residues. It is to include.
- conservative amino acid substitutions have occurred in a recombinant FVIII polypeptide according to the present disclosure.
- Conservative amino acid substitutions mean substitutions that do not substantially affect or reduce the activity of a particular polypeptide. For example, 1 to 15 conservative substitutions, 1 to 12, For example, 1, 2, 5, 7, 9, 12, or 15 conservative amino acid substitutions.
- amino acid variations are made based on the relative similarity of amino acid side chain substituents such as hydrophobicity, hydrophilicity, charge, size, and the like.
- amino acid side chain substituents such as hydrophobicity, hydrophilicity, charge, size, and the like.
- arginine, lysine and histidine are all positively charged residues; Alanine, glycine and serine have similar sizes; Phenylalanine, tryptophan and tyrosine have a similar shape.
- arginine, lysine and histidine Alanine, glycine and serine; Phenylalanine, tryptophan and tyrosine are biologically equivalent functions.
- the hydropathic index of amino acids may be considered.
- Each amino acid is assigned a hydrophobicity index according to its hydrophobicity and charge: isoleucine (+4.5); Valine (+4.2); Leucine (+3.8); Phenylalanine (+2.8); Cysteine / cysteine (+2.5); Methionine (+1.9); Alanine (+1.8); Glycine (-0.4); Threonine (-0.7); Serine (-0.8); Tryptophan (-0.9); Tyrosine (-1.3); Proline (-1.6); Histidine (-3.2); Glutamate (-3.5); Glutamine (-3.5); Aspartate (-3.5); Asparagine (-3.5); Lysine (-3.9); And arginine (-4.5).
- hydrophobicity indexes are particularly important for imparting the interactive biological function of proteins. It is known that substitution with amino acids having similar hydrophobicity indexes can retain similar biological activity. When introducing mutations with reference to the hydrophobicity index, substitutions between amino acids which exhibit a hydrophobicity index difference of preferably within ⁇ 2, more preferably within ⁇ 1 and even more preferably within ⁇ 0.5 are advantageous.
- Amino acid substitutions that do not alter the activity of the recombinant protein according to the present invention are also known in the art (H. Neurath, R. L. Hill, The Proteins, Academic Press, New York, 1979).
- substitutions are amino acid residues Ala / Ser, Val / Ile, Asp / Glu, Thr / Ser, Ala / Gly, Ala / Thr, Ser / Asn, Ala / Val, Ser / Gly, Thr / Phe And substitutions between Ala / Pro, Lys / Arg, Asp / Asn, Leu / Ile, Leu / Val, Ala / Glu and Asp / Gly.
- sequence comparison methods known in the art. At least 80% homology, in particular at least 85%, more when aligning the sequences disclosed herein to any other sequences as closely as possible and analyzing the aligned sequences using algorithms commonly used in the art. In particular, sequences exhibiting at least 90%, even more particularly at least 95% homology, mean substantial identity. Alignment methods for sequence comparison are known in the art. For example, Smith and Waterman, Adv. Appl. Math. (1981) 2: 482; Needleman and Wunsch, J. Mol. Bio. (1970) 48: 443; Pearson and Lipman, Methods in Mol. Biol.
- Recombinant single chain FVIII according to the present disclosure is at least 90%, at least 95%, at least 97%, at least 98%, at least 99%, or as compared to wild-type double-chain FVIII in terms of activity per mole of active substance. It includes those having 100%. Wild-type double-chain FVIII and methods for measuring its activity are well known and can be performed, for example, by determining the inactivation level and (APTT) / CS ratio measured by CS and the clotting assay (APTT: activated partial thromboplastin time). (Coagulation Assays Circulation. 2005; 112: e53-e60).
- Bi-chain FVIII is processed by purine as described above to consist of dimers of light and heavy chains.
- recombinant protein of native FVIII Advanced FVIII
- CHO cells most of which consist of a double-chain containing various lengths of B region, similar to the composition of plasma-derived native FVIII.
- the double chain FVIII to be compared with the single chain FVIII according to the present application may or may not include the B region.
- the B region is mainly processed by recombination intentionally removing the B region or expressing a native FVIII and processing the protein and cleavage by FXa (active FX) and thrombin in the blood.
- FXa active FX
- thrombin thrombin in the blood.
- a backbone that does not contain can be generated.
- the B region may be recombinantly included in part or the whole of the B region, or in the process of expressing a native FVIII, or by the protein cleavage process by FXa (active FX) and thrombin in the blood.
- FVIII duplexes comprising some or all of may be generated.
- the double-chain FVIII which is directly compared with the short chain of the present application, expresses recombinant FVIII of a native type including the entire B region by recombinant expression. Subsequently, some or all of the B region is removed by thrombin or FIXa or FXa so that it is a recombinant FVIII that is most similar to the native FVIII in a mixture of FVIII containing no B region or a part of the B region.
- the present application relates to a nucleic acid molecule or polynucleotide encoding a single-chain recombinant FVIII according to the present application, a vector comprising said polynucleotide or a cell strain transformed with said vector.
- Nucleic acid molecules encoding the recombinant single-chain FVIII according to the present application includes those that have been codon optimized according to the type of cells expressing the recombinant single-chain FVIII according to the present application.
- the nucleic acid sequence is an optimization of the nucleic acid sequence encoding the protein of SEQ ID NO: 5 can be represented by the sequence of SEQ ID NO: 15.
- Nucleic acid molecules encoding recombinant single-chain FVIII according to the present invention also include those encoding FVIII corresponding to substantially the same biological equivalents as described above.
- nucleic acid molecules encoding a single-chain recombinant FVIII according to the present application can be cloned into various expression vectors for various purposes.
- the specific configuration of the expression vector may vary depending on the host cell to which the single-chain recombinant FVIII according to the present invention is to be expressed.
- a vector comprising a nucleic acid molecule encoding a recombinant single chain FVIII according to the present disclosure may be prepared by methods known in the art, for example, a nucleic acid molecule encoding a recombinant single chain FVIII according to the present disclosure may be a promoter and / or Operate connection to the enhancer. In one embodiment is inserted into a recombinant expression vector capable of expressing a foreign gene in the cell, examples of such vectors include, but are not limited to, general protein expression vectors such as pMSGneo, pcDNA3.1 (+).
- an expression vector including a matrix attachment region (MAR) factor that binds to a nuclear matrix is used.
- MAR matrix attachment region
- the MAR factor induces position-independent expression. It plays a role in increasing gene expression. Therefore, when using the pMSGneo vector, a stable and high expression amount can be obtained.
- pcDNA3.1 (+) vector contains a strong CMV promoter, widely used for protein expression.
- the recombinant expression vector comprising a nucleic acid molecule encoding a recombinant single-chain FVIII according to the present application can be transformed into a suitable host cell as described below for various purposes.
- the coding sequence of the nucleic acid molecule encoding the protein can be optimized appropriately for the desired cell.
- the present application relates to recombinant cells transfected or transformed into a vector according to the present application.
- Such cells include both prokaryotic and eukaryotic cells that can be used for the amplification of the vector and / or nucleic acid molecules contained in the vector, thereby being used to produce the desired protein.
- Various cells that can be used for this purpose are known, and those skilled in the art will be able to select appropriate ones in view of the specific purposes and effects herein, and may include, for example, those described in the Examples and the drawings herein, but not limited thereto. It is not. Examples include E. coli, Mammalian cells, Yeast, Plant cells, Insect cells.
- eukaryotic cells in particular mammalian cell lines, are used for expression of recombinant FVIII.
- mammalian cell lines include CHO, BHK, COS7, HEK cell lines and the like can be used, and preferably, CHO cell line, in particular CHO-S cell line, CHO-DG44 or CHO-K1 cell line, or HEK cell line especially HEK293 cell line can be used, but not limited thereto.
- the vector according to the present invention is delivered to such a host cell for expression.
- Methods for delivering vectors to such host cells are known in the art, for example, calcium phosphate precipitation method, shotgun method, liposome method, using a method known in the art such as nanoneedle or electroporation method May be, but is not limited to such.
- Short-chain FVIII may be modified at a specific residue with a hydrophilic polymer for the purpose of increasing the half-life.
- the protein structure of the B region is not known.
- the B region is a protein with a flexible structure and a high degree of glycosylation, and is known to be rich in negative charge, but its structure is difficult to predict. That is, it is theoretically possible to predict the structure of the B region using molecular modeling techniques, but considering the heterogeneity due to post-translational modification and glycosylation of the B region, it is difficult to predict the B region structure. As such, in order to select a modified position in the B region, structural information on the surface of the B region protein structure is required, but since there is no information about this, it is very difficult to select a PEGylation position.
- residues of region A and / or B which do not particularly affect the activity of short-chain FVIII are selected through unexpected efforts and modified with hydrophilic polymers to obtain short-chain FVIII with improved half-life while maintaining inherent activity. It was.
- the PEGylation position was selected between -6 and +6 residues.
- the present application is conjugated with a hydrophilic polymer at some amino acid residues of the A region and / or B region fragment, and the conjugated position is based on the amino acid residues 754, 781, 782 in the B region based on the sequence of SEQ ID NO: 0. At least one position selected from the group consisting of 788, 789, 825 and 897; At least one position selected from the group consisting of amino acid residues 491, 495, 498 and 1806 based on the sequence of SEQ ID NO: 0 in the A-region, wherein the residue at the conjugated position is for conjugation with the hydrophilic polymer A single-chain coagulation factor 8 is substituted with cysteine.
- Hydrophilic polymers that can be used for the modification of short-chain FVIII according to the present application can be used a variety of polymers known in the art, including, but not limited to, polyethylene glycol, polyethylene oxide, dextran, polysialic, etc. It is not. These polymers are biocompatible (non-toxic, low-toxic) hydrophilic, flexible structures that prevent the loss of activity and prevent loss of activity due to non-specific interactions of the conjugated proteins with chemically conjugated proteins. It serves to prevent inactivation by proteolytic enzymes.
- PEG is used, in particular PEG of at least 20 kDa.
- PEG binds to proteins and gives them the effect of wrapping around the protein, which can then be lost after binding to scavenger receptors in the body or to prevent degradation by inactivating protease.
- PEG is a chain-shaped polymer that is linear or branched, and small molecular weight PEG does not cover the protein enough to completely protect the protein. Therefore, the molecular weight must be above the limit level to sufficiently cover the protein to be protected.
- PEGylation of the short-chain FVIII of the present application may be conjugated via PEG containing one end of an acryloyl, sulfone or maleimide group specific to cysteine after substitution of an amino acid at the PEGylation position with cysteine.
- the short-chain FVIII according to the present application may be substituted with a specific residue for modification to the hydrophilic polymer, specifically, the residue to be replaced depends on the position where the hydrophilic polymer is conjugated on the short-chain FVIII, and those skilled in the art May be modified with appropriate residues.
- PEGylation is used as the modification, in which case the residue to be modified is substituted with cysteine.
- the residue is substituted with cysteine for PEGylation.
- a protein substituted with cysteine for modification can be performed using methods known in the art, for example, for proteins to be PEGylated, free cysteine introduced is free during expression in cells or after exiting cells.
- free cysteine introduced by forming disulfide bonds with cysteine or glutathione, a low-molecular substance containing thiol, and stabilizing the free cystine introduced by reducing conditions immediately before PEGylation to increase PEGylation efficiency need.
- the PEGylation reaction can be carried out using a known method, for example, cysteine or glutathione used for masking free cysteine must be removed before the PEGylation reaction to restore the free thiol of cystine introduced. , Including the treatment of reducing agents such as DTT, beta-mercaptoethanol, cysteine, glutathione (reduced form), and oxidation to restore the reductive cleavage of the native disulfide bonds in this process. Can be.
- cysteine or glutathione used for masking free cysteine in addition to the cell culture medium components or
- cysteine or glutathione components which are normally produced, accumulated and secreted by cells during growth and maintenance of cells, may be used without additional addition to cell culture medium components.
- the present invention also provides a method of transfecting a vector according to the present application into an eukaryotic cell; Culturing the cells in culture; Collecting the culture solution to purify cysteine-introduced FVIII; And treating the purified cysteine introduced FVIII with PEGylation buffer; Restoring the introduced free thiol group of cysteine through a reduction process; Oxidizing to restore disulfide bonds within the isolated short chain FVIII protein during the reduction process;
- the present invention relates to a method for producing short-chain coagulation factor 8, comprising specifically PEGylating a short-chain FVIII cysteine restored to a reduced thiol group and isolating PEGylated short-chain FVIII.
- Recombinant single-chain FVIII according to the present invention can be usefully used for the treatment of hemophilia A, hemophilia, in particular hemophilia A patients, or hemophilia A.
- the present application also provides a blood coagulation kit for use in a hemophilia patient or a patient in need of blood coagulation, including any one of the short chain coagulation factors 8 disclosed herein, including the claims of the present application, Use or composition for the treatment of hemophilia, or a composition comprising a nucleic acid of a base sequence encoding a single-chain coagulation factor 8 Nucleic acid of the hemophilia type A using the composition and the nucleic acid of the base sequence encoding a single-chain coagulation factor 8 to be used in the treatment It relates to a hemophilia treatment method or a blood coagulation method comprising the step of administering to the hemophilia patients or patients in need of coagulation of the blood containing a composition or a short-chain coagulation factor eight.
- Recombinant single-chain FVIII according to the present application may be provided in the form of a pharmaceutical composition for treating hemophilia comprising a pharmaceutically acceptable carrier.
- composition of the present invention can be used alone or in combination with methods using other drug treatments and biological response modifiers.
- composition of the present invention may be prepared by including one or more pharmaceutically or physiologically acceptable carriers in addition to the above-mentioned active ingredients.
- carrier means a pharmaceutically acceptable carrier, excipient, or stabilizer that is nontoxic to a cell or mammal that is exposed to the dosages and concentrations employed.
- examples of such carriers include saline, Ringer's solution, buffered saline, buffers such as phosphate, citrate and other organic acids, antioxidants including ascorbic acid, low molecular weight (less than about 10 residues) polypeptides, proteins such as serum albumin, gelatin Or immunoglobulins; Hydrophilic polymers such as polyvinylpyrrolidone, amino acids such as glycine, glutamine, asparagine, arginine or lysine, monosaccharides, disaccharides and other carbohydrates including glucose, mannose or dextrins, for example EDTA, sugars Alcohols such as mannitol or sorbitol, salt-forming counter ions such as sodium, and / or nonionic surfactants such as tween, polyethylene glycol (P
- injectable formulations such as aqueous solutions, suspensions, emulsions and the like.
- injectable formulations such as aqueous solutions, suspensions, emulsions and the like.
- it may be preferably formulated according to each disease or component by an appropriate method in the art or using a method disclosed in Remington's Pharmaceutical Science (Recent Edition, Mack Publishing Company, Easton PA). have.
- compositions herein are particularly preferred parenteral administration (eg, intravenous, subcutaneous, intraperitoneal) according to the desired method.
- the dosage depends on the condition and weight of the patient, the extent of the disease, the form of the drug, the route of administration and the time of day, and may be appropriately selected by those skilled in the art.
- composition according to the invention is administered in a therapeutically effective amount.
- therapeutically effective amount means an amount sufficient to treat a disease at a reasonable benefit / risk ratio applicable to medical treatment, with an effective dose level being the type of disease, severity, activity of the drug, drug Sensitivity to, time of administration, route of administration and rate of administration, duration of treatment, factors including concurrent use of drugs, and other factors well known in the medical arts.
- the compositions of the present invention may be administered as individual therapeutic agents or in combination with other therapeutic agents, may be administered sequentially or simultaneously with conventional therapeutic agents, and may be single or multiple doses. Taking all of the above factors into consideration, it is important to administer an amount that can obtain the maximum effect in a minimum amount without side effects, which can be easily determined by those skilled in the art.
- Recombinant single-chain FVIII according to the present application may be administered in a therapeutically effective amount to a subject in need of hemophilia or coagulation in the form of a composition as described above or in the form of a blood coagulation method or a method of treating hemophilia, This may be referred to the above description.
- treatment means any action in which symptoms caused by a disease are improved or beneficially altered by administration of a composition of the present invention.
- Subjects in which the methods according to the invention are used are primates including but not limited to humans.
- FVIII expressed in the short chain form
- FVIII was constructed in which a part of the B region including the furin cleavage position 1648 residue (based on the amino acid sequence of SEQ ID NO: 0 representing the full length FVIII amino acid sequence) was deleted. Since the length and length of the B region connecting the heavy and light chains may affect the activity and properties of the final FVIII, a total of seven types of FVIII were constructed as shown in Table 1 to determine the length of the B region included in the scFVIII. Each scFVIII constructed was constructed to include a B region of a certain length from the N-terminal (SEQ ID NO: 741 amino acid residue) of the B region and to contain the sugar chain originally possessed by this B region.
- a portion of the a3 domain adjacent to the light chain site is contained more than scFVIII of other structures.
- SEQ ID NO: 6 scFVIII optimized with CHO codon was made to enhance expression in CHO cells (nucleic acid SEQ ID NO: 15).
- Each scFVIII lacking the B region was synthesized based on the human FVIII nucleic acid sequence (NM000132).
- the G1 protein sequence (Leader-Heavy chain-B domin (741-764, 1653-1689) -Light chain) was encoded based on the human FVIII nucleic acid sequence (NM000132) to prepare the scFVIII gene expression vector.
- Genes were synthesized through GeneArt to include Xho I- Pac I enzyme cleavage sites in Not I- Asis I and 3 '.
- the synthesized gene was cloned into the Not I / Xho I site of the pcDSW vector to construct a pcDSW-G1 expression vector, and the accuracy of the expression vector construction was confirmed by comparing the cut band sizes after cleavage using the Asis I / Pac I enzyme. It was.
- Each scFVIII (G2, G3, G4, G4-flex, G6) is deleted from the BamH I site (GGATCC) in the A2 region of the FVIII heavy chain from the gene chain to include the Pac I enzyme cleavage site at the end of the light chain.
- Example 1-1 ScFVIII constructed in Example 1-1 was expressed in cells, and the expressed cells were cultured in cell culture medium.
- the expression vector constructed in Example 1-1 was transfected into Expi293F TM cells using the transient expression system Expi293F TM Expression System Kit (Thermofisher, Catalog Number A14635). Briefly, Expi293F TM cells were passaged at 2.0 X 10 6 cells / mL at an expected requirement 24 hours before transformation, and then the number of cells and viability were measured on the day of transformation. When cell viability was 95% or more, transformation was performed.
- 7.5 X 10 7 cells were added to a 125 mL flask to adjust the final volume of 25.5 mL by adding Expi293 culture medium (based on 30 mL).
- 30 ⁇ g of the expression vector constructed in Example 1-1 was mixed using Opti-MEM so that the total volume was 1500 ⁇ L.
- 80 ⁇ L transfection reagent was mixed to a total volume of 1500 ⁇ L using Opti-MEM and incubated at room temperature for 5 minutes. After 5 minutes, the Opti-MEM containing the transfection reagent was added to the Opti-MEM containing the DNA and mixed gently. And reacted at room temperature for 20-30 minutes.
- a 3 mL DNA: transfection reagent complex was previously dropped in a 125 mL flask Expi293F TM cell (Total volume: 28.5 mL) and incubated at 37 rpm, 125 rpm in a 5% CO 2 shacking incubator. After 16 to 20 hours, 150 ⁇ L and 1.5 mL of Enhancer 1 and Enhancer 2 were added thereto, and then incubated at 34 rpm and 125 rpm in a 5% CO 2 shacking incubator. On day 3 of culture, the medium was harvested and scFVIII activity was measured as follows.
- BDD-FVIII was up to 50% lower in activity as measured by coagulation assay (APTT) than in chromogenic assay (CS), while full-length FVIII was similar in both measurements (BARROWCLIFFE et al., SEMIN THROMB HEMOST, vol. 28 (3), 2002: 47-56).
- the low activity of BDD in clotting assays has been attributed to the fact that BDD-FVIII does not prevent bleeding in patients with hemophilia A than full-length FVIII in real-term prophylaxis (GRUPPO, RA, et al., 2003.
- the FVIII activity measurement test methods used herein are two-stage method and chromogenic method.
- One-stage method is a method for measuring FVIII activity of a sample by mixing FVIII deficient plasma, activator, phospholipids and FVIII sample and measuring blood coagulation time.
- the chromogenic method mixes FIXa, FX, thrombin, calcium, phospholipids and FVIII samples, inserts a chromogenic substrate that is cut and developed by FXa to measure the amount of FXa activated by the FVIII sample, and develops the chromogenic substrate. It is a method of measuring the activity of FVIII according to the degree.
- the one-stage method uses FVIII deficient plasma and measures clotting time.
- the chromogenic method does not use FVIII deficient plasma, but the factors necessary for activation of FVIII and activated FVIII. After adding the substrate for measurement, the degree of color development of the substrate is measured.
- Activity measurement by the one-stage method was performed using an automated method previously prepared on the ACL TOP CTS 500 instrument as follows. Samples were diluted to 1 IU / mL concentration using FVIII deficient plasma, and 1 mL distilled water was dissolved in NIBSC FVIII standard vial, and then diluted to 1 IU / mL concentration using FVIII deficient plasma. Consumable reagents and measurement samples were prepared according to the rack type of the experimental equipment. The calcium chloride vial was placed in the R rack of the ACL TOP CTS 500 equipment in order to recognize the barcode, and the magnetic stirring bar was placed in the APTT-SP vial and placed in the R rack so that the barcode of the vial was recognized.
- FVIII deficient plasma was prepared by measuring the number of samples ⁇ 400 ⁇ L and taped the periphery to Ral to prevent vial recognition.
- DA rack has G.O.
- a vial containing 2.63 mL of albumin was placed in 50 mL of buffer (Imidazole 3.4 g, NaCl 5.8 g, 1 L, pH 7.4). Put the sample prepared above and 400 ⁇ L into the sample cup and place the sample cup in the sample rack.
- Information from unrecognized reagents and measurement samples was entered in the ACL TOP program, and pre-made automated assays were run. All reactions of the automated assay proceeded as follows at 37 degrees.
- the sample to be measured is pre-dilution 10 times with G.O buffer, and then diluted 1, 3, and 10 times further to make 100%, 33,33%, and 10% samples.
- 50 ⁇ L of the diluted sample was allowed to stand for 30-45 seconds, and then mixed with 50 ⁇ L FVIII deficient plasma and allowed to stand for 60-70 seconds.
- 50 ⁇ L (intermediate reagent) APTT-SP the mixture was allowed to stand for 300-340 seconds, and finally, 50 ⁇ L start reagent (APTT-SP CaCl 2) was added, and the solidification time was measured.
- Chromogenic method was used to measure the activity of chromogenic assay kit sold by CHROMOGENIX as an endpoint method, and the test method provided by the manufacturer was modified to suit the present test as follows. Specifically, dilute the sample to enter the standard range (0.25-1 IU / mL) using a 1 ⁇ dilution buffer. Calibration plasma was prepared using a 1 ⁇ dilution buffer to a concentration of 0, 0.25, 0.5, 1 IU / mL. 10 ⁇ L of the prepared sample and 10 ⁇ L of the standard product were diluted with 790 ⁇ L of 1 ⁇ dilution buffer, and then 50 ⁇ L was dispensed into a 96 well plate and left at 37 ° C. for 5 minutes.
- 50 ⁇ L of the reagent reagent was dispensed into each well by using an automatic dispenser pipette, followed by reaction at 37 ° C. for 2 minutes.
- 50 ⁇ L substrates were dispensed into each well and allowed to develop for 2 minutes at 37 ° C. for 2 minutes.
- 50mL 2% citric acid was added to the developed sample to stop the reaction. After measuring the absorbance at 405nm wavelength to draw a linear calibration curve, the absorbance of the sample was substituted into the calibration curve to measure the activity of the sample.
- scFVIII expressed in the culture medium increased with the increase in the length of the B region, and it was confirmed that the expression level was significantly increased in scF4, scF5, scF6, scF7 having a length of the B region of 198 or more amino acids.
- scF3, scF4, scF5, scF6, and scF7 which have a length of 92 or more amino acids, showed similar levels of inactivation to the recombinant full-length FVIII (Advate®, manufactured by Baxalta) and used as a reference. Similar to Advate® used as reference.
- the expression level was significantly lower, and the length of the B region was shorter than the length of 84 amino acid protein sequences such as scF1, scF2 of the Example. Inactivity was significantly lower than Advate®, the full-length FVIII used as a reference.
- Short-chain FVIII is activated by thrombin cleavage at the site comprising the B region connecting the heavy and light chains in the activation step. If the length of the B region, which is the linking site between the heavy and light chains, is short, the structural limitation by the short linker length may affect the activity due to the abnormal conversion of short-chain FVIII to thrombin-activated FVIII. However, in the case of the double-chain FVIII, there is no structural limitation, and thus activation of thrombin regardless of the length of the B region is expected to be smooth. It can be seen from the similarity to the activity of FVIII.
- the length and sequence of the B region of the single-chain FVIII are selected so as not to affect thrombin activation, so that the thrombin activation sites (1689-1690 and 740-741; ) was activated similar to the native (ie wild-type) FVIII, yielding similar short-chain FVIII in addition to the full-length FVIII used in comparison.
- the culture solution and LDS sample buffer were mixed at a ratio of 3: 1, respectively, and loaded with 30 ⁇ L of the sample mixed in 4-12% bis-tris (BT) gel, and then run at 150 volt for about 1 hour. After running the gel was transferred to Nitrocellulose (NC) membrane, it was allowed to stand for one hour in blocking buffer (Thermo Scientific). Subsequently, primary antibodies that recognize heavy chains (GMA-012, Green Mountain Antibodies) and light chains (ab41188, Abcam) of FVIII were prepared by diluting them in TBST buffer, and then placed in a blocked NC membrane and reacted for 1 hour. Was performed.
- the stability of scF1, scF2, and scF3 having a relatively short B region was superior to scF4, scF5, scF6, and scF7, but the expression level was relatively low or inactive.
- short-chain FVIII having various lengths of B region derived from natural type double-chain FVIII was prepared and characterized, and the effect of length of B region on the expression level, inactivation, and stability was evaluated to evaluate the effect of FVIII and activity of natural type. Recombinant single-chain FVIII with similar expression characteristics and high expression level could be produced.
- the sequence and length of the B region in the single-chain FVIII including a part of the B region may affect the FVIII activity characteristics, the activity and properties of the recombinant blood coagulation FVIII may be affected.
- the PEGylation site was selected to give persistence in the body based on the scFVIII produced in Example 1, which is composed of the B region of the sequence and the length to preserve the properties.
- PEGylation was performed at various positions in the B region. Because PEGylation targets the surface residues of proteins, the three-dimensional structure of the B region is required to select the PEGylation position. However, since the structure is unknown, the PEGylation position was difficult to select.
- the PEGylation position of the B region selected herein selectively PEGylated around the sugar chain of the B region. In other words, the sugar chain is located outside the protein structure, and residues around the sugar chain of the B region are always likely to go out, and thus it may be advantageous for pegylation.
- cysteine is located at various positions near the sugar chain of the B region based on G4 constructed in Example 1 as shown in Table 3 and FIG. 4, that is, between +6 and -6 residues based on the N-sugar chain.
- the introduced recombinant scFVIII variant was constructed and subjected to PEGylation selectively to the introduced cysteine. This PEGylation has been described for G4, single-chain FVIII, but can also be applied to the PEGylation of other scFVIII containing sugar chains constructed herein with the same logic.
- Example 1-1 An expression vector prepared in Example 1-1 after synthesizing a gene through GeneArt to include a cysteine substitution site and a BamH I site (GGATCC) present in the A2 region of the FVIII heavy chain, and a light chain and a Pac I enzyme cleavage site.
- pcDSW-scFVIII G4 was removed using the enzyme BamH I / Pac I, and the cloned gene was cloned into BamH I / Pac I site to clone the synthesized pcDSW-scFVIII G4 (B1, B2, B3, B4, B5, B6, B7, A3-1 or 4L) expression vectors were constructed and the accuracy of expression vector construction was confirmed by sequencing.
- cysteine is introduced scFVIII G4 (A2-1, A2-2, or A2-3) are present in the Kpn I Asis I enzyme cleavage site from the area A2 present in the A1 region of the FVIII heavy chain comprising a cysteine substitution site site (GGTACC) by using the GeneArt Inc.
- Transient expression was performed in the same manner as in Example 1-2 using the mscFVIII expression vector into which the constructed cysteine was introduced.
- the amount of expression of each cystine introduced FVIII is shown in Table 3 below.
- Table 3 the scFVIII variant in which cysteine was introduced around the glycan chain in the B region was normally expressed in the culture medium.
- the expression level was somewhat lower than scFVIII prior to cysteine introduction, which is thought to be because cysteine introduced into scFVIII affects the expression process and stability of scFVIII in culture.
- PEGylation of the scFVIII variant into which Cysteine was introduced as in Example 2-1 to screen for PEGylation sites was performed as follows. Concentrate 50 mL of the cell culture with 5 kDa MWCO (molecular weight cutoff) and add 5 M NaCl conc solution to the final 1 M NaCl.
- V8 select resin GE
- equilibration buffer 20 mM Histidine, 500 mM NaCl, 0.1% (w / v) Tween®80, pH 7.0
- the concentrated sample were thoroughly stirred together and washed with equilibration buffer
- elution buffer (20 mM Histidine, 500 mM NaCl, 0.1% (w / v) Tween®80, pH 7.0, 50% (v / v) propylene glycol).
- the eluted samples were exchanged with pegylation buffer (20 mM Histidine, 500 mM NaCl, 0.1% (w / v) Tween®80, pH 7.0, 5% (w / v) sucrose) using a 5kDa MWCO membrane, followed by a final 0.2 mM of TCEP. Treated and reacted at 4 degrees for 1 hour.
- Cysteine-introduced scFVIII variants require cysteine and glutathione to be masked for pegylation because cysteine introduced during cell culture is masked as a disulfide bond by cysteine or glutathione.
- TCEP tris (2-carboxyethyl) phosphine
- PD10 desalination column
- maleimide-PEG specific for cysteine (40 kDa) was treated to pegylated.
- SDS PAGE was performed on the PEGylation reaction to analyze the degree of PEGylation.
- pegylated scFVIII was produced at the position selected in Example 2 as follows.
- the cysteine constructed in Example 2-1 introduced scFVIII G4 (B3) and scFVIII G4 (A2_1) were expressed in each cell and cultured.
- the expression vector constructed in Example 2-1 was transferred to Expi293F TM cells using an Expi293F TM Expression System Kit (Thermofisher, Catalog Number A14635) according to the manufacturer's method.
- the cell number and viability at the time of transformation were measured and transformation was performed when the cell viability was 95% or more.
- Into a 125mL flask was adjusted to 25.5mL by adding Expi293 culture medium to 7.5 X 10 7 cells.
- 30 ⁇ g of the expression vector constructed in Example 2-2 was mixed using Opti-MEM so that the total volume was 1500 ⁇ L.
- 80 ⁇ L transfection reagent was mixed to a total volume of 1500 ⁇ L using Opti-MEM and incubated for 5 minutes at room temperature. After 5 minutes, the Opti-MEM containing the transfection reagent was added to the Opti-MEM containing the DNA and mixed gently. And reacted at room temperature for 20-30 minutes.
- a 3 mL DNA: transfection reagent complex was previously dropped into a 125 mL flask Expi293F TM cell (Total volume: 28.5 mL) and incubated at 125 rpm in a 37 ° C., 5% CO 2 shacking incubator. After 16-20 hours, 150 ⁇ L and 1.5 mL of Enhancer 1 and Enhancer 2 were added thereto, and the cells were incubated at 125 rpm in a 34 ° C., 5% CO 2 stirred incubator. On the second day of culture, all the cells were centrifuged to completely remove the existing culture medium.
- the PEGylation and purification process is largely composed of five stages, and purification was performed by pooling the culture medium 3, 4, and 5 in Example 3-1.
- the VIIISelect resin developed by GE for the purification of FVIII was used to isolate and purify FVIII from the culture.
- the equilibration buffer (20 mM Histidine, 5 mM CaCl 2 , 1 M NaCl, 0.02% Tween® 80, pH 7.0) was run out to equilibrate. 5M NaCl buffer was added to the final culture solution to the final 1M NaCl concentration, the pH was adjusted to 7.0, and then loaded on the column. After incubation, the equilibration buffer was equilibrated by flowing until UV dropped to the baseline.
- Elution buffer (20 mM Histidine, 5 mM CaCl 2 , 0.9 M Arginine, 45% propyleneglycol, 0.02% Tween®80, pH 6.5) was run out to elute scFVIII.
- GE's SP fast flow resin was used to rapidly remove propylene glycol in the eluate of the first step.
- wash the column by flowing washing buffer 0.5M NaOH, 1M NaCl.
- Equilibration was performed by flushing equilibration buffer (20 mM Histidine, 5 mM CaCl 2 , 0.02% Tween® 80, pH 7.0).
- the eluate of the VIIISelect process was diluted 10-fold with equilibration buffer, then the pH was titrated to 7.0 and loaded onto the column. After loading, the equilibration buffer was equilibrated by flowing until UV dropped to the baseline.
- Elution buffer (20 mM Histidine, 5 mM CaCl 2 , 400 mM NaCl, 0.02% Tween® 80, pH 6.5) was run out to rapidly elute scFVIII.
- TCEP was added to the purified scFVIII solution so that the final concentration was 0.1 mM, and the cysteine was reduced by standing at 4 ° C for 1 hour. Residual TCEP was removed using a PD-10 column (GE healthcare) equilibrated with PEGylation buffer (20 mM Histidine, 5 mM CaCl 2 , 200 mM NaCl, 0.02% Tween® 80, pH 7.0). In order to oxidize the disulfide bond of the reduced FVIII itself, it was left at 4 ° C for 2 hours.
- PEG conjugation of scFVIII G4 was allowed to stand for 12-16 hours at 4 ° C after adding 40 kDa branched methoxy maleimide PEG solution (50mg / mL) dissolved in DMSO so that the PEG ratio per protein was 1:20. .
- the scFVIII G4 (A2_1) PEG conjugation was performed in the same manner using a 60 kDa branched methoxy maleimide PEG.
- GE's SP fast flow resin was used to remove scFVIII without PEG and scFVIII with two or more PEGs, impurity generated during PEGylation.
- the column was washed by flowing washing buffer (0.5M NaOH, 1M NaCl). Equilibration was performed by flushing equilibration buffer (20 mM Histidine, 5 mM CaCl 2 , 0.02% Tween® 80, pH 7.0). The eluate of the PEGylation process was diluted 10-fold with equilibration buffer, then the pH was titrated to 7.0 and loaded onto the column.
- the equilibration buffer was equilibrated by running until UV fell to the baseline.
- NaCl concentration in elution buffer (20 mM Histidine, 5 mM CaCl 2 , 50-400 mM NaCl, 0.02% Tween®80, pH 6.5) was stepped up, and PEG-scFVIII was eluted selectively.
- PEG-scFVIII eluted in the fourth step was concentrated.
- the concentration was 25 IU / mL using Millipore's amicon 30kDa.
- the activity of the purified PEGylated scFVIII (PEG-scFVIII-B3, PEG-scFVIII-A2-2) used in Example 3-2 was measured by CS and APTT methods.
- the CS test method was performed in the same manner as described in Example 1-2, and the APTT test method was performed by modifying the method described in Example 1-2.
- the activity of PEGylated FVIII was measured by the APTT method, the colloidal silica-based APTT-SP was used as an activator, and the lower activity than the original activity was analyzed.
- the ellagic acid synthAFax (IL) was used, the normal activity was measured. (Gu. JM et al., 2014.
- PEG-scFVIII-B3 and PEG-scFVIII-A2-2 showed similar APTT / CS ratio (APTT / CS) to Advate®, which is a two-chain FVIII containing full-length B region as a comparative material. It was confirmed that Xyntha, which is a double-chain FVIII from which the B region was removed, and the APTT / CS ratio were different. This indicates that the scFVIII protein produced herein did not result in a change in the activity properties of blood coagulation FVIII by short chain and PEGylation, considering that the activity of the native FVIII was almost the same in CS and APTT.
- Xyntha is a double-chain recombinant FVIII in which the B-domain is completely removed.
- coagulation activity APTT
- PEG-scFVIII-B3 and PEG-scFVIII-A2-2 maintain blood coagulation activity even after short-chain and pegylation, these two substances according to the present application are considered to have advantages as therapeutic agents for hemophilia.
- the half-life of pegylated scFVIII was distributed at the University of Pennsylvania, and it was compared and compared in 11-12-week-old hemophilia type A mouse model (B6; 129S4-F8tm1Kaz / J (FVIII-knock-out)) identified by genotyping. Compared with Advate®.
- the test substance was G4, scFVIII, PEG40kDa-G4scFVIII-B3 (see Example 3), which was site-specific PEGylated with 40kDa branched PEG maleimide after substitution of cysteine with 782 isoleucine at the B region of G4 (see Example 3), 495 of the A2 region of G4.
- the first valine is cy60e-substituted PEG60kDa-G4scFVIII-A2-2 with 60kDa branched PEG maleimide and Advate®, a recombinant FVIII of the double chain.
- test animals used for pharmacokinetics were hemophilia mice (females) administered to the tail vein at 125 IU / kg in three hemophilia mice per sample.
- Blood was collected from the orbit by time (5min, 4hr, 8hr, 16hr, 24hr, 32hr, 40hr, 48hr, 56hr, 72hr) after administration and treated with 10% anticoagulant (3.2% sodium citrate), followed by centrifugation. Separated.
- the activity of FVIII present in plasma was measured using CS assay measurement reagents as described in Examples 1-2.
- the profile of the average of FVIII activity in plasma collected from mice of each sample group by time is shown in FIG. 7.
- the PK parameter analysis was performed using the NCA (Non Compartmental Analysis) method using the WinNonlin software to calculate the mean and standard deviation of plasma FVIII CS activity.
- NCA Non Compartmental Analysis
- WinNonlin software to calculate the mean and standard deviation of plasma FVIII CS activity.
- the half-life of drugs was found in the order B3 ⁇ A2-2> G4> Advate® (Table 5). Judging from the mean data, the half-life of drugs increased by 1.9 times for B3, 1.8 times for A2-2, and 1.2 times for G4 (Table 5).
- mice The coagulation effect of tail bleeding in mice was measured as follows.
- Mouse was anesthetized by intraperitoneal administration of Entobarbital Sodium at a concentration of 60 mg / kg.
- the test substance dose was calculated relative to the mouse body weight (mouse weight was between 19-25 g), and then the test substance was administered intravenously with jugular vein. After 5 minutes of administration, the mouse tail was cut 4 mm from the tip, and immediately after 2 cm of the tail was immersed in a conical tube containing saline, blood was collected for 30 minutes.
- Test substances were compared to Advate® with PEG-scFVIII-B3 prepared in Example 3. Dose (dosage and dose volume) and distribution of mice in each test substance group are shown in Table 6 below.
- the blood collected for each mouse was centrifuged at 1500 x g for 5 minutes to remove the supernatant, and then the 10 mL pipet was used to add 3 mL of distilled water to the conical tube to 10 mL, and the blood was completely hemolyzed using vortex. Blood loss measurement was performed according to the manual provided in the Hemoglobin assay kit (sigma, MAK115-1KT).
- the blood loss values of 40kDaPEG-G4scFVIII-B3 and Adate 50, 100, 200 IU / kg group were significantly different from those of HA group, and 40kDaPEG-G4scFVIII- in HA mouse.
- the acute tail-clipping test showed that both test substances reduced the amount of blood loss in a concentration-dependent manner (see FIG. 8B).
- scFVIII in order to select scFVIII having excellent expression, retaining and maximally retaining natural FVIII activity and preventing degradation in culture, scFVIII including B regions of various lengths and sequences were prepared and expressed, and then the activity was measured. Through the process of confirming the stability, scFVIII was developed which has useful properties as a hemophilia type A therapeutic agent. In addition, various PEGylated conjugates were prepared based on the scFVIII developed in the present application, thereby improving FVIII PEGylated conjugates having improved usefulness as therapeutic agents.
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Abstract
Description
Claims (23)
- 인간 혈액응고 8인자(Factor VIII)의 중쇄, 경쇄 및 일부가 결실된 B 영역 단편을 포함하며, 상기 일부가 결실된 B 영역 단편은 퓨린 단백질분해효소에 의한 절단부위를 포함하지 않도록 서열번호 1의 서열의 1648 및 1649 잔기를 포함하여 상기 잔기의 N-말단 및 C-말단 방향으로 각각 최소 5개의 아미노산이 결실되고, 4개 내지 6개의 당화 부위를 포함하도록 일부가 결실된 것인, 단쇄 혈액응고 8인자(Factor VIII).
- 제 1 항에 있어서, 상기 B 영역 단편은 야생형 B 영역 서열의 15% 내지 40%를 포함하는 것인, 단쇄 혈액응고 8인자.
- 제 2 항에 있어서,상기 일부가 결실된 B 영역 단편은 서열번호 1의 서열을 기준으로 (i) 아미노산 잔기 741 내지 902 및 1654 내지 1689; (ii) 아미노산 잔기 741 내지 965 및 1654 내지 1689의 아미노산 서열; 또는 (iii) 아미노산 잔기 741 내지 902, 1637 내지 1642 및 1654 내지 1689;의 서열인, 단쇄 혈액응고 8인자.
- 제 3 항에 있어서,상기 단쇄 혈액응고 8인자는 서열번호 4, 서열번호 5 또는 서열번호 6으로 표시되는 서열 또는 이와 90% 이상 상동성이 있는 서열을 갖는 것인, 단쇄 혈액응고 8인자.
- 제 1 항 내지 제 4 항 중 어느 한 항에 있어서,상기 단쇄 혈액응고 8인자는 CS 또는 APTT 방법으로 측정한 비활성이 이쇄 혈액응고 8인자 비활성의 90% 이상인, 단쇄 혈액응고 8인자.
- 제 1 항 내지 제 4 항 중 어느 한 항에 있어서,상기 혈액응고 8인자는 상기 A 영역 및/또는 B 영역 단편의 일부 아미노산 잔기에서 친수성 폴리머와 컨쥬게이션되고, 상기 컨쥬게이션되는 위치는 상기 B 영역에서 서열번호 1의 서열을 기준으로 아미노산 잔기 754, 781, 782, 788, 789, 825 및 897로 구성되는 군으로부터 선택되는 하나 이상의 위치이고; 상기 A-영역에서 서열번호 1의 서열을 기준으로 아미노산 잔기 491, 495, 498 및 1806으로 구성되는 군으로부터 선택되는 하나 이상의 위치이고,상기 컨쥬게이션되는 위치의 잔기는 상기 친수성 폴리머와의 접합을 위해 시스테인으로 치환되는, 단쇄 혈액응고 8인자.
- 제 6 항에 있어서,상기 친수성 폴리머는 폴리에틸렌글리콜(Polyethylene glycol), 폴리에틸렌 옥사이드, 덱스트란 또는 폴리시알릭을 포함하고, 상기 PEG는 상기 위치에서 acryloyl, sulfone 또는 maleimide를 통하여 연결된 것인, 단쇄 혈액응고 8인자.
- 제 5 항에 있어서,상기 PEG는 평균 분자량이 20kDa 이상인 단쇄 혈액응고 8인자.
- 제 1 항에 있어서, 상기 단쇄 혈액응고 8인자는 서열번호 2 내지 7 중 어느 하나의 아미노산 서열로 표시되는, 단쇄 혈액응고 8인자.
- 제 9 항에 있어서, 상기 단쇄 혈액응고 8인자는 서열번호 2 내지 7에서 제 6 항에 기재된 컨쥬게이션 부위가 시스테인으로 치환된 아미노산 서열을 갖는, 단쇄 혈액응고 8인자.
- 제 9 항 또는 제 10 항에 따른 단백질을 코딩하는 핵산분자.
- 제 11 항에 있어서, 상기 제 9 항에 따른 핵산분자는 서열번호 10 내지 15 중 어느 하나이고, 상기 제 10 항에 따른 단백질을 코딩하는 핵산분자는 서열번호 17 내지 32 중 어느 하나인, 핵산분자.
- 제 11 항 또는 제 12 항에 따른 핵산분자를 포함하는 벡터.
- 제 13 항에 따른 벡터를 포함하는 세포.
- 제 13 항에 따른 벡터를 진핵세포에 전달이입하는 단계; 또는 선택적으로 제 14 항에 따른 세포를 제공하는 단계;상기 세포를 배양액 중에서 배양을 통하여 도입된 시스테인이 자유 티올 기를 시스테인 또는 글루타티온에 의해 이황화(disulfide) 결합으로 마스킹 된 단쇄 FVIII형태로 발현시키는 단계;상기 배양액으로부터 발현된 단쇄 FVIII을 수집하여 환원제로 처리하여 마스킹 된 시스테인이나 글루타티온을 이탈 시키는 단계; 및상기 처리된 배양액을 페길화완충액으로 처리하는 단계를 포함하는, 단쇄 혈액응고 8인자의 생산방법.
- 인간 혈액응고 8인자(Factor VIII)의 중쇄, 경쇄 및 일부가 결실된 B 영역 단편을 포함하며, 상기 일부가 결실된 B 영역 단편은 퓨린 단백질분해효소에 의한 절단부위를 포함하지 않으며 최소 4개의 당화 부위를 포함하도록 그 일부가 결실된 것으로,상기 일부가 결실된 B 영역 단편은 서열번호 1의 서열을 기준으로 (i) 아미노산 잔기 741 내지 902 및 1654 내지 1689; (ii) 아미노산 잔기 741 내지 965 및 1654 내지 1689의 아미노산 서열; 또는 (iii) 아미노산 잔기 741 내지 902, 1637 내지 1642 및 1654 내지 1689;의 서열인, 단쇄 혈액응고 8인자.
- 인간 혈액응고 8인자(Factor VIII)의 중쇄, 경쇄 및 단백질분해효소에 의한 절단부위를 포함하지 않으며 최소 4개의 당화 부위를 포함하도록 일부가 결실된 B 영역 단편을 포함하는 단쇄 혈액응고 8인자로,상기 일부가 결실된 B 영역 단편은 서열번호 1의 서열을 기준으로 (i) 아미노산 잔기 741 내지 902 및 1654 내지 1689; (ii) 아미노산 잔기 741 내지 965 및 1654 내지 1689의 아미노산 서열; 또는 (iii) 아미노산 잔기 741 내지 902, 1637 내지 1642 및 1654 내지 1689; 의 서열이며,상기 A 영역 및/또는 B 영역의 일부 잔기가 페길화되었으며, 상기 페길화된 잔기는 상기 B 영역에서 서열번호 1의 서열을 기준으로 아미노산 잔기 754, 781, 782, 788, 789, 825 및 897로 구성되는 군으로부터 선택되는 하나 이상의 위치이고; 상기 A-영역에서 서열번호 1의 서열을 기준으로 아미노산 잔기 491, 495, 498 및 1806으로 구성되는 군으로부터 선택되는 하나 이상의 위치인, 단쇄 혈액응고 8인자.
- 제 17 항에 있어서,상기 페길화가 되는 잔기는 시스테인으로 치환된 것인, 단쇄 혈액응고 8인자.
- 인간 혈액응고 8인자(Factor VIII)의 중쇄, 경쇄 및 단백질분해효소에 의한 절단부위를 포함하지 않으며, 최소 4개의 당화 부위를 포함하도록 일부가 결실된 B 영역 단편을 포함하는 단쇄 혈액응고 8인자(Factor VIII)로,상기 일부가 결실된 B 영역 단편은 서열번호 1의 서열을 기준으로 (i) 아미노산 잔기 741 내지 902 및 1654 내지 1689; (ii) 아미노산 잔기 741 내지 965 및 1654 내지 1689의 아미노산 서열; 또는 (iii) 아미노산 잔기 741 내지 902, 1637 내지 1642 및 1654 내지 1689;의 서열이며,상기 A 영역 및/또는 B 영역의 일부 잔기가 페길화되며, 상기 페길화된 잔기는 상기 B 영역에서 서열번호 1의 서열을 기준으로 아미노산 잔기 754, 781, 782, 788, 789, 825 및 897로 구성되는 군으로부터 선택되는 하나 이상의 위치이고; 상기 A-영역에서 서열번호 1의 서열을 기준으로 아미노산 잔기 491, 495, 498 및 1806으로 구성되는 군으로부터 선택되는 하나 이상의 위치인, 그리고 상기 페길화된 잔기는 시스테인으로 치환된 것인, 단쇄 혈액응고 8인자.
- 제 1 항 내지 제 10 항 또는 제 16 항 내지 제 19 항 중 어느 한 항에 따른 유효한 양의 단쇄 혈액응고 8인자를 혈우병 치료가 필요한 대상체에게 처리하는 단계를 포함하는, 혈우병 치료 방법.
- 제 1 항 내지 제 10 항 또는 제 16 항 내지 제 19 항 중 어느 한 항에 따른 유효한 양의 단쇄 혈액응고 8인자를 혈우병 치료가 필요한 대상체에게 처리하는 단계를 포함하는, 혈액 응고 방법.
- 제 1 항 내지 제 10 항 또는 제 16 항 내지 제 19 항 중 어느 한 항에 따른 단쇄 혈액응고 8인자 및 약학적으로 허용가능한 담체를 포함하는, 혈우병 치료용 조성물.
- 제 1 항 내지 제 10 항 또는 제 16 항 내지 제 19 항 중 어느 한 항에 따른 단쇄 혈액응고 8인자의 혈우병 치료용 용도.
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CN116710554B (zh) * | 2021-11-25 | 2024-06-07 | 四川至善唯新生物科技有限公司 | 基因工程改造获得的分泌能力和凝血活性增强的人类八因子 |
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KR20190018013A (ko) | 2019-02-20 |
JP2019527541A (ja) | 2019-10-03 |
JP2021118696A (ja) | 2021-08-12 |
KR102219859B1 (ko) | 2021-02-25 |
CN109689683A (zh) | 2019-04-26 |
JP7235511B2 (ja) | 2023-03-08 |
US20230151078A1 (en) | 2023-05-18 |
EP3476860A4 (en) | 2020-01-22 |
EP3476860A1 (en) | 2019-05-01 |
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