JP5107716B2 - 分子治療用生分解性リンカー - Google Patents
分子治療用生分解性リンカー Download PDFInfo
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- JP5107716B2 JP5107716B2 JP2007540091A JP2007540091A JP5107716B2 JP 5107716 B2 JP5107716 B2 JP 5107716B2 JP 2007540091 A JP2007540091 A JP 2007540091A JP 2007540091 A JP2007540091 A JP 2007540091A JP 5107716 B2 JP5107716 B2 JP 5107716B2
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- A61K47/50—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
- A61K47/69—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 conjugate being characterised by physical or galenical forms, e.g. emulsion, particle, inclusion complex, stent or kit
- A61K47/6957—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 conjugate being characterised by physical or galenical forms, e.g. emulsion, particle, inclusion complex, stent or kit the form being a device or a kit, e.g. stents or microdevices
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- A61K47/50—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
- A61K47/69—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 conjugate being characterised by physical or galenical forms, e.g. emulsion, particle, inclusion complex, stent or kit
- A61K47/6901—Conjugates being cells, cell fragments, viruses, ghosts, red blood cells or viral vectors
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Description
本発明は、生体材料(例えば、遺伝子ベクター、組み換えタンパク質、細胞、及び薬剤)を表面に共有結合により連結するための組成物及び方法であって、組成物を加水分解に晒すことにより、選択された生分解性クロスリンカー内の結合が切断されて、生体材料を制御下で表面から放出できるような組成物及び方法を開発しようとする要求の下になされたものである。本発明は、様々な用途において、生体材料を身体又は細胞に送達するために使用できる。例えば、治療用ウイルスベクターを冠動脈ステントに共有結合により結合させれば、再狭窄防止の遺伝子治療に対する新たなアプローチとなる。
本発明の生分解性クロスリンカーは、(a)加水分解性結合を含んでなる生分解性クロスリンカー部位、(b)生体材料反応性末端基、及び(c)基体反応性末端基を含んでなる。この生分解性クロスリンカーは、以下の一般式により表わすことができる。
Ft−A1−D−A2−Fp
ここで、Fpは、リンカーの残りの部分(Ft−A1−D−A2−)をアミノ酸残基(リジン、メチオニン等)に共有結合させる生体材料反応性末端基であり;A1及びA2は、ヘテロ原子(例えば、O、S、NH等)を含んでいてもよい、脂肪族又は芳香族のブリッジ又は部分であり;Dは、カルボン酸又はカルバミン酸のエステルを含んでなる、生理学的条件によって分解し得るブリッジ又は部分、或いは、水性媒体中で徐々に非酵素的に開裂し得るその他のブリッジであり;Ftは、基体反応性末端基、好ましくはチオール反応性基(ピリジルジチオ、マレイミド、ビニルスルホン、ヨードアセトアミド等)である。
3−アミノプロパノール(0.76ml、10mmol)を、CH2Cl2(5ml)及び2−プロパノール(3ml)の混合物に溶解させ、氷浴で冷却した。SPDP(1.23g、3.9mmol)のCH2Cl2(2ml)中溶液を約1分間で加えた。この混合物を冷浴中で1.25時間攪拌し、13%NaH2PO4水溶液(15ml)及び85%H3PO4(0.5ml)を加えた。生成物を酢酸エチル(2×30ml)で抽出し、有機層を13%NaH2PO4、15%KHCO3で洗浄し、真空中で乾燥した。この粗化合物3(1.14g)をシリカゲルのフラッシュクロマトグラフィーで精製し、CHCl3及び2−プロパノールの混合物(体積比100:0から100:7)で溶出した。純化合物3の収率1.01g(94%)。化合物3のTLC(CHCl3〜2−プロパノール、9:1):1スポット、Rf約0.3。化合物3の1H NMR(CDCl3)、δ、ppm:1.68 (quint., 6Hz, 2H), 2.60 (t, 7Hz, 2H), 3.05 (t, 7Hz, 2H), 3.4 (br., 1H), 3.42 (q, 6Hz, 2H), 3.62 (br., 2H), 6.99 (br., 1H), 7.10 (m, 1H), 7.58−7.65 (m, 2H), 8.41 (m, 1H)。
アルコール3(1.44g、5.3mmol)をCH2Cl2(6ml)に溶解させ、アジピン酸無水物(1.74g、13.6mmol)を加えた(調製法は以下を参照:N. Ropson, P. H. Dubois, R. Jerome and P. H. Teyssie: Synthesis and characterization of biodegradable homopolymers and block copolymers based on adipic anhydride. Journal of Polymer Science: Part A: Polymer Chemistry 1997, 35, 183−192)。混合物を真空下で乾燥してシロップ状とし(3.29g)、22℃で8時間反応させた後、ピリジン(5ml)で希釈した。10分間攪拌した後、水(55ml)を加え、この混合物を35〜40℃で約30gまで減圧濃縮した。酸4をCHCl3(2×50ml)で抽出し、4%KHCO3(3×40ml)中に再抽出した。水相をH3PO4でpH=3に酸性化し、酸4をCHCl3(3×40ml)で抽出した。この粗化合物(2.59g)を、シリカゲルのフラッシュクロマトグラフィーで精製し、CHCl3及び2−プロパノールの混合物(体積比100:0から100:8)で溶出した。純化合物4の収率:1.78g(84%)。化合物4のTLC(CHCl3〜2−プロパノール、9:1):1スポット、Rf約0.5。4の1H NMR(CDCl3)、δ、ppm:1.70 (m, 4H), 1 .88 (quint., 6Hz, 2H), 2.36 (t, 7Hz, 2H), 2.38 (t, 7Hz, 2H), 2.61 (t, 7Hz, 2H), 3.05 (t, 7Hz, 2H), 3.36 (q, 6Hz, 2H), 4.15 (t, 6Hz, 2H), 6.96 (br. t, 1H), 7.16 (m, 1H), 7.66−7.73 (m, 2H), 8.44 (m, 1H)。
酸4(0.934g、2.33mmol)をN,N−ジメチルアセトアミド(17ml)に溶解させた。N−ヒドロキシスルホスクシンイミドのジナトリウム塩(Pierce、0.469g、2.16mmol)、ジシクロヘキシルカルボジイミド(1.00g、4.85mmol)、及び水(2.0ml)を順に加え、混合物を20〜22℃で4時間攪拌した。ジシクロヘキシルウレアの沈殿を濾別し、濾液を(最高0.1mmHg、及び30℃を超えない条件で)減圧濃縮し、シロップ状とした(2.5g)。このシロップを数回に分けてヘキサン(計140ml)でよく洗浄し、酢酸エチル(45ml)を加えて凝固するまで練和した。4℃で一晩放置した後、固体を濾別し、tert−ブタノール(30ml)、酢酸エチル(60ml)で洗浄し、真空下で乾燥した。粗製物1(1.215g)を精製すべく、メタノール(30ml)に溶解させ、エタノール(30ml)で希釈し、セルロースCC 31(Whatman)層で濾過し、濾液を減圧濃縮して懸濁液(6.9g)とした後、続いて濾過し、エタノールで洗浄し、真空下で乾燥した。純クロスリンカー1の収率:1.06g(80%)。1の1H NMR(DMSO−d6)、δ、ppm:1.62 (m, 4H), 1.69 (quint., 7Hz, 2H), 2.33 (t, 7Hz, 2H), 2.49 (t, 7Hz, 2H), 2.68 (t, 7Hz, 2H), 2.85 (dd, 18, 2Hz, 1H), 3.01 (t, 7Hz, 2H), 3.10 (q, 7Hz, 2H), 3.16 (br., 1H), 3.94 (br. d, 1H) 4.01 (t, 7Hz, 2H), 7.25 (m, 1H), 7.76 (m, 1H), 7.83 (m, 1H), 8.00 (br. t, 6Hz, 1H), 8.46 (m, 1H)。
2,2’−ジピリジルジスルフィド(Sigma−Aldrich、2.50g、11.35mmol)を乾燥ペンタン(150ml)中に懸濁させ、20分間、17〜20℃で激しく攪拌しながらCl2で飽和させた。得られた2−ピリジンスルフェニルクロリドの濃厚懸濁液を15mmHgで蒸発乾固させ、残渣をアルゴンで保護し、無水酢酸(39ml)を加えた。アルゴンによる保護を継続しながら、β−メルカプトエタノール(1.05ml)の無水酢酸(12ml)中溶液を、滴下により15分間かけて、18〜20℃で攪拌混合物に加えた。攪拌を更に5分間継続し、水(25ml)を加えた。反応溶液を真空下で乾燥してシロップ状とし(6.66g)、KHCO3(11g)の水(65ml)溶液を加えた。反応生成物をCHCl3(2×50ml)で抽出し、有機層をNa2SO4で乾燥し、乾燥剤を濾別し、真空下で溶媒を除去した。この粗化合物5(3.59g)をシリカゲルのフラッシュクロマトグラフィーで精製し、ヘキサン及び酢酸エチルの混合物(体積比5:1から1:1)で溶出した。純化合物5の収率:2.58g(92%)。5のTLC(ヘプタン〜酢酸エチル、2:3):1スポット、Rf約0.4。化合物5の1H NMR(CDCl3)、δ、ppm:2.93 (t, 6Hz, 2H), 3.77 (br. m, 2H), 5.75 (br. m, 1H), 7.13 (m, 1H), 7.38 (m, 1H), 7.56 (m, 1H), 8.49 (m, 1H)。
アルコール5(0.818g、4.36mmol)及びBoc−グリシンN−ヒドロキシスクシンイミドエステル(Boc−GIy−OSu)(Sigma−Aldrich、1.835g、6.45mmol)を、乾燥ピリジン(3.5ml)中、55〜65℃で1時間攪拌した。反応混合物をトルエン(30ml)で希釈し、真空下で乾燥した。残渣(3.28g)を酢酸エチル(40ml)に溶解させ、ヘキサン(100ml)で希釈し、濾過して、10%NaCl(50ml)で洗浄した。有機層をNa2SO4で乾燥し、乾燥剤を濾別して、真空下で乾燥した。この粗化合物6(1.80g)をシリカゲルのフラッシュクロマトグラフィーで精製し、ヘキサン及び酢酸エチルの混合物(体積比5:1から1:1)で溶出した。純化合物6の収率:1.41g(94%)。化合物6のTLC(ヘプタン〜酢酸エチル、2:3):1スポット、Rf約0.7。化合物6の1H NMR(CDCl3)、δ、ppm:1.42 (s, 9H), 3.02 (t, 7Hz, 2H), 3.88 (d, 6Hz, 2H), 4.38 (t, 7Hz, 2H), 4.98 (br., 1H), 7.08 (m, 1H), 7.60−7.66 (m, 2H), 8.45 (m, 1H)。
化合物6(1.431g、4.1mmol)をCH2Cl2(10ml)に溶解させ、CF3COOH(5ml)を加えた。混合物を周囲温度で2時間放置した。揮発分を真空下で除去し、残渣であるアミンのトリフルオロ酢酸塩7(3.59g)を、CH2Cl2(10ml)とピリジン(5ml)との混合物に溶解させ、氷浴で冷却した。アジピン酸無水物(1.86g、14.5mmol)を滴下で1分間で加え、混合物を冷浴中で10分間、室温で0.5時間攪拌した。溶媒を真空下で除去し、残渣のシロップを水(40ml)で希釈し、KHCO3(4.0g)で中和し、30gまで減圧濃縮し(ピリジンを除去し)、H3PO4でpH=3に酸性化した。酸8をCHCl3(2×30ml)で抽出し、抽出物をNa2SO4で乾燥し、溶媒を真空下で除去した。この粗化合物8(2.35g)をKHCO3(3.0g)の存在下で水(60ml)に溶解し、非酸性不純物をCHCl3〜ヘキサン(体積比3:1、60ml)の混合物で抽出し、水相をH3PO4でpH=4に酸性化した。CHCl3(2×45ml)で抽出後、Na2SO4で乾燥し、溶媒を真空下で除去し、残渣(1.86g)を酢酸エチル(4ml)に溶解させ、ヘプタン(4ml)を徐々に加えて結晶化させた。化合物8の結晶を種晶として結晶化を補助した。結晶を濾別し、酢酸エチル〜ヘプタン(1:1、10ml)、ヘキサン(10ml)で洗浄し、真空下で乾燥した。純結晶化合物8の収率:1.31g(85%)。化合物8のTLC(CHCl3〜2−プロパノール、9:1):1スポット、Rf約0.4。化合物8の1H NMR(CDCl3)、δ、ppm:1.67 (m, 4H), 2.26 (t, 6Hz, 2H), 2.35 (t, 6Hz, 2H), 3.02 (t, 7Hz, 2H), 4.00 (d, 6Hz, 2H), 4.39 (t, 7Hz, 2H), 6.28 (br. t, 6Hz, 1H), 7.10 (m, 1H), 7.60−7.80 (m, 2H), 8.45 (m, 1H)。
酸8(1.284g、3.45mmol)、N−ヒドロキシスルホスクシンイミドジナトリウム塩(Pierce、0.700g、3.22mmol)及びジシクロヘキシルカルボジイミド(1.50g、4.85mmol)を、N,N−ジメチルアセトアミド(26ml)及び水(3.0ml)中で、上述のクロスリンカー1について上述したのと同様にして反応させた。クロスリンカー2の単離及び精製は、クロスリンカー1の場合と同様に行なった。純クロスリンカー2の収率:1.652g(90%)。クロスリンカー2の1H NMR(DMSO−d6)、δ、ppm:1.61 (m, 4H), 2.18 (t, 6Hz, 2H), 2.67 (br. t, 6Hz, 2H), 2. 86 (d, 18Hz, 1H), 3.15 (br., 1H), 3.11 (t, 7Hz, 2H), 3.82 (d, 6Hz, 2H), 3.94 (br. d, 1H) 4.26 (t, 7Hz, 2H), 7.26 (m, 1H), 7.78 (m, 1H), 7.86 (m, 1H), 8.30 (br. t, 6Hz, 1H), 8.46 (m, 1H)。
「表面」、「基体」、「基質」、又は「支持体」という語は、ここでは互換的に使用される語であって、本発明の生分解性クロスリンカーを介して生体材料を結合するのに適した官能基を有するよう処理又は官能化された、或いは処理又は官能化されるべき、任意の表面を意味する。こうした表面の非限定的な例としては、金属表面、少なくとも一の炭素を有する非金属表面、及び複合材料、例えばオルガノシレート化(organosylated)金属等、が挙げられる。
金属支持体の官能化は、その金属に結合する化学部分を有するモノマー又はポリマーの表面修飾剤を用いて行なうことができる。これらは米国特許出願公開No. 2003/0044408 A1、Levy et al.、2002年6月14日出願に記載されており、その全体がここに組み込まれる。そうした金属材料を例示すると、ステンレススチール、MP35ステンレススチール、酸化アルミニウム、白金、白金合金、エルジロイ(elgiloy)、チバニウム(tivanium)、ビタリウム(vitallium)、チタン、チタン合金、NITINOL(ニッケル−チタン合金)、クロム、コバルト、それらの合金及び酸化物が挙げられる。
少なくとも1の炭素を有する非金属表面として、好ましくはポリマー性表面である。本発明のポリマー性表面は、生分解性でも非生分解性でもよい。本発明において使用されるポリマー性表面の非限定的な例としては、ポリウレタン、ポリエステル、ポリ乳酸、ポリグリコール酸、ポリ(ラクチド−co−グリコシド)、ポリ(ε−カプロラクトン)、ポリスチレン、ポリアミド、ゴム、シリコーンゴム、ポリアクリロニトリル、ポリアクリレート、及びポリメタクリレート、ポリ(α−ヒドロキシ酸)、ポリ(ジオキサノン)、ポリ(オルトエステル)、ポリ(エーテル−エステル)、ポリ(ラクトン)、これらの混合物及びこれらのコポリマーが挙げられる。
本発明の生体材料は、適切な反応性基を有する分子又は高分子、例えばカルボキシ(−COOH)、アミノ(−NH2)、チオール基(−SH)等が結合されたものであれば、任意の分子又は高分子とすることができる。例えば、タンパク質又はペプチドを修飾してチオール基を含有させたものや、アミノ基を含有させたものが使用できる。あるタンパク質分子に結合しているチオール反応性基(2−ピリジルジチオ、マレイミド等)と、別のタンパク質分子(或いは他の生体分子)のチオール基との反応は、タンパク質複合体の調製に広く用いられている(Greg T. Hermanson, Bioconjugate Techniques, Academic Press, San Diego 1996参照)。殆どのチオール反応性基(特に2−ピリジルジチオ基)は、水性媒体中、温和な条件下で、チオール基と極めて選択的且つ高速に反応する。タンパク質は、様々な試薬を用いて、ジスルフィドブリッジを部分還元し、或いはリジン残基をチオール化することにより、チオール化することができる(Hermanson, pp. 57−70参照)。好ましくはチオール反応性基を有する生体材料であり、中でも好ましくは、生分解性クロスリンカーの生体材料反応性基と反応可能なアミノ基である。
また、本発明によれば、上述の組成物を作製する方法が提供される。本方法は、生分解性クロスリンカーを供給する工程と、少なくとも1の反応性基を有する基体を供給する工程と、上記の生体材料を供給する工程と、前記基体を前記生分解性クロスリンカーの基体反応性末端基と反応させ、生分解性クロスリンカー部位を前記基体に共有結合させる工程と、前記生体材料を前記生分解性クロスリンカーの生体材料反応性末端基と反応させることにより、前記生体材料を前記生分解性クロスリンカー部位に共有結合させ、前記組成物を作製する工程とを含んでなる。本方法の非限定的な例を図4Aに示す。必ずしも最初に生体材料をクロスリンカーと反応させる必要はないが、この順序の方が簡便であると思われる。即ち、特定の実施形態によれば、前記生体材料を前記生分解性クロスリンカーの生体材料反応性末端基と反応させる工程を、前記基体を前記生分解性クロスリンカーの基体反応性末端基と反応させる工程よりも前、或いは当該工程と同時に実施する。
また、本発明の組成物を使用する方法、例えば生体材料を送達する方法であって:前記加水分解性結合を加水分解して前記生体材料を放出することにより、前記生体材料を前記動物細胞又は前記組織に送達させるのに十分な期間、前記動物細胞又は前記組織に接触させる工程を含んでなる方法が提供される。本方法の非限定的な例を図4Bに示す。実施例5には本方法の一例を記載した。
本実験は、チオール開裂し得る異種二官能性クロスリンカーであるスルホスクシンイミジル6−(3’−[2−ピリジルジチオ]−プロピオンアミド)ヘキサオネート(スルホ−LC−SPDP)(Pierce Biotechnology, Inc., Rockford, IL)を用い、生体材料をステンレススチール表面に直接、共有結合により繋留するという思想を実証したものである。
1.対照: Me−PAABP + (PDT−Ad)(共有結合形成なし)
2.増幅なし: (Me−PrSSPAABP + TCEP) → Me−PAABP−SH + PDT−Ad → Me−PAABP−Ad
3.PEI増幅: (Me−PrSSPAABP + TCEP) → Me−PAABP−SH + PDT−PEI → Me−PAABP−PEI−PDT(n) + DTT → Me−PAABP−PEI−SH(n) + PDT−Ad → Me−PABPP−PEI−Ad
本実験は、開裂性(加水分解性)N−スクシンイミジル3−(2−ピリジルジチオ)−プロピオネート(SPDP)クロスリンカーを用いてスチール表面に共有結合させたAdと、加水分解の遅延キネティクスによるストラテジーを検証するために行なったものである。316Lスチールのメッシュ12個を常法で前処理し、そのうち8つを1%PrSSPAABP中、60℃で5時間反応させた。4つの対照(PAABPがチオール基を有さず、よってAdと共有結合していない)メッシュを、2,2−ジホスホノエチル基で修飾されたポリアリルアミン(PAABP)3%と、60℃で5時間反応させた。これらのメッシュを洗浄し、PrSSPAABP処理検体をTCEP(0.1M酢酸バッファー中20mg/ml)と、振盪しながらRTで25分間反応させた。TCEPの開裂後、メッシュをDDW中で洗浄し、PEI−PDT増幅剤(09 IA-46-4;0.5ml、DDW1.25ml、0.4M酢酸バッファー0.25ml)と1時間反応させた。その後、これらのメッシュを酢酸バッファー及びDDWで洗浄し、DTT(DDW中20mg/ml)とRTで振盪しながら20分間反応させた。
本実験は、開裂性(加水分解性)SPDPクロスリンカーを用いてスチール表面に共有結合させたAdと、加水分解の急速キネティクスとを用いたストラテジーを探るために行なったものである。
9つのメッシュをイソプロパノール及び1Nの硝酸で前処理し、PrSSPAABPの2%溶液中で、70℃で強振盪(250rpm)しながら3時間培養した。次に、これらのメッシュを、TCEP(0.1M酢酸バッファー中20mg/ml)と、30℃で振盪しながら25分間反応させた。洗浄後、メッシュをPEI−PDT(14IA-13-1)と、30℃で強振盪しながら1時間反応させた。メッシュを洗浄し、同じ条件下でDTT(水中20mg/ml)と30分間反応させた。最後に、洗浄したメッシュを、急速開裂性クロスリンカー2で修飾されたAd−GFP0.5mlと、250rpmで振盪しながら30℃で2時間反応させた。
6個のステンレススチールVelocityTMステント(Cordis Corp)を、イソプロパノール、THF、クロロホルム(55℃で2時間)、1Nの硝酸(1時間)で浄化し、260℃に1時間加熱した。その後、これらのステントをカテーテルに圧着し、PrSSPAABPの2%水溶液と、58℃、250rpmで4時間反応させた。次に、これらのサンプルをTCEP(0.1M酢酸バッファー中25mg/ml)により、40〜35℃、250rpmで25分間還元した。洗浄後、これらのステントを、PEI−PDT増幅剤(14IA-13-1)と、28℃、250rpmで一晩反応させた。
本実験は、ポリビスホスフォネート修飾スチールに直接繋留したAdの放出速度を調べるべく計画された。実施例2及び3に記載された、緩徐及び急速の加水分解キネティクスによる、2つの異なる加水分解性クロスリンカー(即ち、それぞれクロスリンカー1(SHC)及びクロスリンカー2(RJC))を用いた。更に、RHCによるAdの修飾は、2つの異なるクロスリンカー濃度で行なった。表面結合Adを可視化し、蛍光定量及び顕微鏡観察による評価を可能にするため、クロスリンカーと蛍光タグ、Cy3とを併用してAdを共修飾した。
ウイルス複合ステンレススチールホイルを各々、浸出溶液(PBS/0.06%Tween−20)中に37℃で配置した。所定の時点で上清を採取し、新たなPBS/0.06%Tween−20を加えた。上清中のCy3標識Adの量を蛍光定量法で決定した。
ウイルス複合の直後に、ホイルの表面を蛍光顕微鏡法で調べ、各ホイルにつき4つのランダムな低倍率視野の画像を、標準設定の顕微鏡及びカメラを用いて撮影した。その後、ホイルをPBS/0.06%Tween−20中に配置した。所定の時点(バッファー交換及び上清サンプリングの際)で再び、画像を撮影した。得られたデジタル画像について、Adobe Photoshop(登録商標)により生成されたヒストグラムから平均発光強度を求め、これに基づいて表面結合Adの定量分析を行なった。
実施例1で記載した増幅剤に加えて、ポリアリルアミンをベースとした以下の増幅剤を増幅手順に使用することも可能である。この増幅剤は以下に記載する手順で調製される(スキーム1参照)。
Claims (21)
- 前記生体材料が、核酸、遺伝子ベクター、タンパク質、ペプチド、及び細胞からなる群より選択される要素である、請求項1記載の組成物。
- 前記生体材料が、医薬製剤を含んでなる、請求項1又は2に記載の組成物。
- 前記基体が、金属、金属酸化物、ミネラル、セラミック、ポリマー、カーボン、オルガノシレート化(organosylated)材料、及び有機金属材料からなる群より選択される要素である、請求項1〜3の何れか一項に記載の組成物。
- 前記生分解性クロスリンカー部位が、前記生体材料を放出及び送達するのに十分な期間作用するように選択される、請求項1〜4の何れか一項に記載の組成物。
- 前記加水分解性結合を加水分解して前記生体材料を放出することにより、前記生体材料を前記動物細胞又は前記組織に送達させるのに十分な期間、請求項1〜6の何れか一項に記載の組成物を前記動物細胞又は前記組織に接触させる工程を含んでなる方法により使用される、請求項1〜6の何れか一項に記載の組成物。
- 前記生分解性クロスリンカー部位が、当該期間作用するように選択される、請求項7記載の組成物。
- 請求項1〜7の何れか一項に記載の組成物を作製する方法であって:
(a)前記加水分解性結合を含んでなる前記生分解性クロスリンカー部位、(b)生体材料反応性末端基、及び(c)基体反応性末端基を有する生分解性クロスリンカーを供給する工程;
少なくとも一つの反応性基を有する基体を供給する工程;
前記生体材料を供給する工程;
前記基体を前記生分解性クロスリンカーの前記基体反応性末端基と反応させ、前記生分解性クロスリンカー部位を前記基体に共有結合により付着させる工程;及び、
前記生体材料を前記生分解性クロスリンカーの前記生体材料反応性末端基と反応させることにより、前記生体材料を前記生分解性クロスリンカー部位に共有結合により付着させ、前記組成物を作製する工程を含んでなる方法。 - 前記生体材料を前記生分解性クロスリンカーの前記生体材料反応性末端基と反応させる工程を、前記基体を前記生分解性クロスリンカーの前記基体反応性末端基と反応させる工程よりも前に、又は当該工程と同時に実施する、請求項9記載の方法。
- 前記基体反応性末端基がチオール反応性基である、請求項9又は10に記載の方法。
- 前記生体材料反応性末端基が、スルホスクシンイミジルエステル基、トレシレート(tresylate)基及びエポキシ基のうちの少なくとも一つである、請求項9〜11の何れか一項に記載の方法。
- 前記基体の前記少なくとも一つの反応性基がチオール基である請求項9〜12の何れか一項に記載の方法。
- 前記生体材料が、核酸、遺伝子ベクター、タンパク質、ペプチド、及び細胞からなる群より選択される要素である、請求項9〜14の何れか一項に記載の方法。
- 前記生体材料が、医薬製剤を含んでなる、請求項9〜15の何れか一項に記載の方法。
- 前記基体が、金属、金属酸化物、ミネラル、セラミック、ポリマー、カーボン、オルガノシレート化(organosylated)材料、及び有機金属材料からなる群より選択される要素である、請求項9〜16の何れか一項に記載の方法。
- 前記基体を前記基体反応性末端基と反応させて生分解性クロスリンカー修飾生体材料を形成する前に、前記生体材料を前記生体材料反応性末端基と反応させる、請求項9〜17の何れか一項に記載の方法。
- 前記生分解性クロスリンカーを供給する工程、及び前記生体材料と反応させる工程が:
(i)前記生体材料反応性末端基及び第1の官能末端基を有する第1の反応物質と、(ii)(a)前記加水分解性結合を含んでなる前記生分解性クロスリンカー部位、(b)前記第1の官能末端基と反応可能な第2の官能末端基、及び、(c)基体反応性末端基を含んでなる、第2の反応物質とを供給する工程;
前記生体材料を前記第1の反応物質の前記生体材料反応性末端基と反応させる工程;並びに
前記第1の官能基を前記第2の官能基と反応させ、前記生分解性クロスリンカー修飾生体材料を形成する工程を含んでなる、請求項9〜18の何れか一項に記載の方法。 - 前記第1の反応物質が、マレイミド−(スルホ)スクシンイミジルエステル、マレイミド−トレシレート(tresylate)、又はピリジルジチオ−(スルホ)スクシンイミジルエステルであり、前記第2の反応物質が、ジチオール、チオール−メチルスルフィド、又はビス(メチルスルフィド)である、請求項9〜19の何れか一項に記載の方法。
- 生体材料を動物細胞又は組織に送達する方法であって、請求項1〜6の何れか一項に記載の組成物を供給する工程;並びに前記加水分解性結合を加水分解して前記生体材料を放出することにより、前記生体材料を動物細胞又は組織に送達するのに十分な期間、前記組成物を前記動物細胞又は前記組織に接触させる工程を含んでなる方法に使用される、請求項1〜6の何れか一項に記載の組成物。
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US8367747B2 (en) | 2008-05-23 | 2013-02-05 | Bezwada Biomedical, Llc | Bioabsorbable polymers from bioabsorbable polyisocyanates and uses thereof |
WO2010108657A2 (en) | 2009-03-23 | 2010-09-30 | Noxxon Pharma Ag | C5a binding nucleic acids and the use thereof |
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US20070298066A1 (en) | 2007-12-27 |
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