JP6826027B2 - インフルエンザ抗原送達用のベクターおよび構築体 - Google Patents
インフルエンザ抗原送達用のベクターおよび構築体 Download PDFInfo
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- JP6826027B2 JP6826027B2 JP2017250464A JP2017250464A JP6826027B2 JP 6826027 B2 JP6826027 B2 JP 6826027B2 JP 2017250464 A JP2017250464 A JP 2017250464A JP 2017250464 A JP2017250464 A JP 2017250464A JP 6826027 B2 JP6826027 B2 JP 6826027B2
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Description
1.少なくとも1世代の間見られなかったインフルエンザウィルスHAサブタイプが、出現する(再出現する)。
2.該ウィルスが、ヒトにおいて感染し、効率的に複製し、重大な病気を起こす。
3.該ウィルスが、ヒトの間で容易に持続的に伝染する。
1.有効性に明白な制限、特に初回接種を受けていない個人に制限がある。これは、抗原不連続変異から生じるインフルエンザの汎発性流行の見通しに関して、特に懸念される。
2.次の秋期/冬期に循環していそうなインフルエンザ株の正確な予測能力に対する依存性。ワクチン株と実際に感染症を起こす株との不一致のために、当該集団の相当な割合がインフルエンザに罹り易くなろう。
3.当該ウィルスが抗原連続変異を受けることによる、年次ごとに危険状態のグループにワクチン再接種を行う必要性。
4.見込みのある生物系製造工場が世界的に限られた数しかないことによる、生産能力上の制約。
5.高齢者年齢層に与えられる防護は、従来ワクチンによって制限されている。
従来のインフルエンザワクチン技術は、ウィルス表面タンパク質に対する抗体応答に主として焦点を当ててきたが、こうした技術は、有効性を弱め、前記の手配上の脆弱性を生み出す、抗原の連続変異および不連続変異を受け易い。対照的に、細胞性免疫応答を媒介するT細胞は、異種のウィルスの株およびクレードに横断的に、より高度に保存されているタンパク質を標的にすることができる。この性質は、異種のウィルスの株およびクレードから防護する見込みのある防護的細胞性免疫応答を誘発するワクチンを与える(ヘテロサブタイプ免疫)。インフルエンザウィルスについては、PB1、PB2、PA、NP、M1、M2、NS1およびNS2の各タンパク質の保存、および対応する抗原特異的なCD4+およびCD8+T細胞の持続が、こうしたタンパク質を魅力的なワクチン標的にしている。
T細胞およびインフルエンザワクチンの分野に関する総説は、交差防護性の広いT細胞ワクチンの設計で直面する多くの決定的難題を強調している。T細胞ワクチンは、第1に、高い率(%)のワクチン被接種者において、CD4+HTLおよびCD8+CTLのT細胞の記憶およびエフェクター機能を初回接種および追加接種で刺激できなければならない。このようなワクチンは、ウィルスの遺伝子多様性および進行中の変異、ならびにMHC対立遺伝子の多型性段階で明らかなヒトの遺伝子多様性にも対処しなければならない。提案した本発明は、高度に保存されたインフルエンザペプチドと共に、新規なフルオロペプチドワクチン送達系を組み合わせることにより、こうした設計上の問題に対処しようとしている。該ペプチドは、1個または複数のエピトープ、特にT細胞エピトープを含有することが知られている抗原であることが好ましい。
式中、Spは、任意選択の化学スペーサー部分であり、Rは、インフルエンザウィルス由来の抗原である。
(i)MHCクラスII結合モチーフを含有し、MHCクラスII分子によって抗原提示細胞の表面に提示される能力を有するペプチド性配列である、CD4+T細胞エピトープと、
(ii)MHCクラスI結合モチーフを含有し、MHCクラスI分子によって該細胞表面に提示される能力を有するペプチド性配列である、CD8+T細胞エピトープと、
(iii)B細胞受容体に対して結合親和性を有するペプチド性配列である、B細胞エピトープ
が含まれる。
HMAIIKKYTSGRQEKNPSLRMKWMMAMKYPITADK
を含み、第2の構築体は、次式のインフルエンザペプチド配列:
YITRNQPEWFRNVLSIAPIMFSNKMARLGKGYMFE
を含む。
構築体1 HMAIIKKYTSGRQEKNPSLRMKWMMAMKYPITADK
構築体2 VAYMLERELVRKTRFLPVAGGTSSVYIEVLHLTQG
構築体3 YITRNQPEWFRNVLSIAPIMFSNKMARLGKGYMFE
構築体4 APIMFSNKMARLGKGYMFESKRMKLRTQIPAEMLA
構築体5 SPGMMMGMFNMLSTVLGVSILNLGQKKYTKTTY
構築体6 KKKSYINKTGTFEFTSFFYRYGFVANFSMELPSFG
構築体7 DQVRESRNPGNAEIEDLIFLARSALILRGSVAHKS
構築体8 DLEALMEWLKTRPILSPLTKGILGFVFTLTVPSER
を含む。
(1)フロイントのアジュバントおよびその誘導体、ムラミルジペプチド(MDP)誘導体、CpG、モノホスホリルリピドAなどの天然の細菌成分を自然に、または合成的に誘導して精製したもの、
(2)サポニン、アルミニウム塩およびサイトカインなどの他の既知のアジュバントまたは増強剤、
(3)水中油アジュバント、油中水アジュバント、免疫賦活複合体(ISCOM)、リポソーム、製剤化ナノおよびマイクロ粒子などの外来アジュバント(上記1、2参照)と共に、またはそれを用いずに抗原を製剤化する方法、
(4)細菌の毒素およびトキソイド、ならびに
(5)当業者に周知の他の有用なアジュバント
を挙げ得る。
i)疾患またはその症状を治療または予防するための医薬の調製における、本明細書に記載したような免疫原性構築体の使用。
ii)本明細書に記載の製剤を投与した後の免疫応答の誘発による治療法。
フルオロカーボンベクターにコンジュゲートし、インフルエンザ用予防または治療ワクチン中に導入するための候補には、以下の1種または複数のペプチドもしくはその断片、または相同体(ロスアラモス国立研究所のインフルエンザ配列データベース(Macken, C., Lu, H., Goodman, J., & Boykin, L., "The value of a database in surveillance and vaccine selection." in Options for the Control of Influenza IV. A.D.M.E. Osterhaus, N. Cox & A.W. Hampson (Eds.) 2001, 103-106.)またはNCBIのインフルエンザウィルス資源において参照されるような、対応するコンセンサス、祖先型または中央系統樹の配列)、あるいはその天然型および非天然型変異体を含み得るが、必ずしもそれだけに限らない。適当なペプチドの具体例を以下に示すが、そこでは標準的な1文字コードが利用されている。相同体は、基準配列と比較した際、少なくとも50%の同一性を有する。相同体は、好ましくは、天然配列と80、85、90、95、98または99%の同一性を有する。非天然アミノ酸の使用で、当該ペプチドのMHCクラスIまたはII受容体と結合する能力を妨害してはならない。1つまたは複数のエピトープを含有するこうした配列の断片も、フルオロカーボンベクターに結合するための候補ペプチドである。
http://www.ncbi.nlm.nih.gov/genomes/FLU/
配列番号1
PB2 27〜61位
HMAIIKKYTSGRQEKNPSLRMKWMMAMKYPITADK
配列番号2
PB2 123〜157位
ERLKHGTFGPVHFRNQVKIRRRVDINPGHADLSAK
配列番号3
PB2 155〜189位
SAKEAQDVIMEVVFPNEVGARILTSESQLTITKEK
配列番号4
PB2 203〜237位
VAYMLERELVRKTRFLPVAGGTSSVYIEVLHLTQG
配列番号5
PB2 249〜283位
EVRNDDVDQSLIIAARNIVRRAAVSADPLASLLEM
配列番号6
PB2 358〜392位
EGYEEFTMVGRRATAILRKATRRLIQLIVSGRDEQ
配列番号7
PB2 370〜404位
ATAILRKATRRLIQLIVSGRDEQSIAEAIIVAMVF
配列番号8
PB2 415〜449位
RGDLNFVNRANQRLNPMHQLLRHFQKDAKVLFQNW
配列番号9
PB2 532〜566位
SSSMMWEINGPESVLVNTYQWIIRNWETVKIQWSQ
配列番号10
PB2 592〜626位
YSGFVRTLFQQMRDVLGTFDTVQIIKLLPFAAAPP
配列番号11
PB2 607〜641位
LGTFDTVQIIKLLPFAAAPPEQSRMQFSSLTVNVR
配列番号12
PB2 627〜659位
QSRMQFSSLTVNVRGSGMRILVRGNSPVFNYNK
配列番号13
PB1 12〜46位
VPAQNAISTTFPYTGDPPYSHGTGTGYTMDTVNRT
配列番号14
PB1 114〜148位
VQQTRVDKLTQGRQTYDWTLNRNQPAATALANTIE
配列番号15
PB1 216〜250位
SYLIRALTLNTMTKDAERGKLKRRAIATPGMQIRG
配列番号16
PB1 267〜301位
EQSGLPVGGNEKKAKLANVVRKMMTNSQDTELSFT
配列番号17
PB1 324〜358位
YITRNQPEWFRNVLSIAPIMFSNKMARLGKGYMFE
配列番号18
PB1 340〜374位
APIMFSNKMARLGKGYMFESKSMKLRTQIPAEMLA
配列番号19
PB1 404〜436位
SPGMMMGMFNMLSTVLGVSILNLGQKKYTKTTY
配列番号20
PB1 479〜513位
KKKSYINKTGTFEFTSFFYRYGFVANFSMELPSFG
配列番号21
PB1 486〜520位
KTGTFEFTSFFYRYGFVANFSMELPSFGVSGINES
配列番号22
PB1 526〜560位
GVTVIKNNMINNDLGPATAQMALQLFIKDYRYTYR
配列番号23
PB1 656〜690位
EYDAVATTHSWIPKRNRSILNTSQRGILEDEQMYQ
配列番号24
PB1 700〜734位
FPSSSYRRPVGISSMVEAMVSRARIDARIDFESGR
配列番号25
PA 107〜141位
PDLYDYKENRFIEIGVTRREVHIYYLEKANKIKSE
配列番号26
PA 122〜156位
VTRREVHIYYLEKANKIKSEKTHIHIFSFTGEEMA
配列番号27
PA 145〜179位
IHIFSFTGEEMATKADYTLDEESRARIKTRLFTIR
配列番号28
PA 166〜200位
ESRARIKTRLFTIRQEMASRGLWDSFRQSERGEET
配列番号29
PA 495〜529位
RRKTNLYGFIIKGRSHLRNDTDVVNFVSMEFSLTD
配列番号30
PA 642〜676位
AKSVFNSLYASPQLEGFSAESRKLLLIVQALRDNL
配列番号31
PA 173〜207位
PRRSGAAGAAVKGVGTMVMELIRMIKRGINDRNFW
配列番号32
NP 240〜274位
DQVRESRNPGNAEIEDLIFLARSALILRGSVAHKS
配列番号33
M1 2〜26位
SLLTEVETYVLSIIPSGPLKAEIAQRLEDVFAGKN
配列番号34
M1 23〜57位
EIAQRLEDVFAGKNTDLEALMEWLKTRPILSPLTK
配列番号35
M1 38〜72位
DLEALMEWLKTRPILSPLTKGILGFVFTLTVPSER
配列番号36
M1 55〜89位
LTKGILGFVFTLTVPSERGLQRRRFVQNALNGNGD
配列番号37
M1 166〜200位
ATTTNPLIRHENRMVLASTTAKAMEQMAGSSEQAA
配列番号38
NS1 128〜162位
IILKANFSVIFDRLETLILLRAFTEEGAIVGEISP
配列番号39
NS2 26〜60位
EDLNGMITQFESLKLYRDSLGEAVMRMGDLHSLQN
http://www.ncbi.nlm.nih.gov/genomes/FLU/
配列番号40
PB2 16〜50位
NEAKTVLKQTTVDQYNIIRKFNTSRIEKNPSLRMK
配列番号41
PB2 117〜151位
YESFFLRKMRLDNATWGRITFGPVERVRKRVLLNP
配列番号42
PB2 141〜175位
ERVRKRVLLNPLTKEMPPDEASNVIMEILFPKEAG
配列番号43
PB2 197〜231位
GTMITPIVLAYMLERELVARRRFLPVAGATSAEFI
配列番号44
PB2 311〜345位
DIIRAALGLKIRQRQRFGRLELKRISGRGFKNDEE
配列番号45
PB2 404〜438位
MVFSQDTRMFQGVRGEINFLNRAGQLLSPMYQLQR
配列番号46
PB2 519〜553位
VSELESQAQLMITYDTPKMWEMGTTKELVQNTYQW
配列番号47
PB2 537〜571位
MWEMGTTKELVQNTYQWVLKNLVTLKAQFLLGKED
配列番号48
PB2 572〜606位
MFQWDAFEAFESIIPQKMAGQYSGFARAVLKQMRD
配列番号49
PB2 717〜751位
LEKLKPGEKANILLYQGKPVKVVKRKRYSALSNDI
配列番号50
PB1 1〜35位
MNINPYFLFIDVPIQAAISTTFPYTGVPPYSHGTG
配列番号51
PB1 97〜131位
EEHPGLFQAASQNAMEALMVTTVDKLTQGRQTFDW
配列番号52
PB1 227〜261位
MTKDAERGKLKRRAIATAGIQIRGFVLVVENLAKN
配列番号53
PB1 393〜427位
KPFFNEEGTASLSPGMMMGMFNMLSTVLGVAALGI
配列番号54
PB1 616〜650位
DPEYKGRLLHPQNPFVGHLSIEGIKEADITPAHGP
配列番号55
PB1 701〜735位
SASYRKPVGQHSMLEAMAHRLRMDARLDYESGRMS
配列番号56
PA 160〜194位
SSLDEEGKGRVLSRLTELQAELSLKNLWQVLIGEE
配列番号57
PA 491〜525位
ESFDMLYGLAVKGQSHLRGDTDVVTVVTFEFSSTD
配列番号58
PA 696〜723位
VIQSAYWFNEWLGFEKEGSKVLESVDEIMDE
配列番号59
NP 173〜207位
FLKEEVKTMYKTTMGSDGFSGLNHIMIGHSQMNDV
配列番号60
NP 253〜287位
EAIRFIGRAMADRGLLRDIKAKTAYEKILLNLKNK
配列番号61
NP 308〜342位
IADIEDLTLLARSMVVVRPSVASKVVLPISIYAKI
配列番号62
NP 338〜372位
IYAKIPQLGFNVEEYSMVGYEAMALYNMATPVSIL
配列番号63
NP 418〜452位
GFHVPAKEQVEGMGAALMSIKLQFWAPMTRSGGNE
配列番号64
M1 166〜300位
ARSSVPGVRREMQMVSAMNTAKTMNGMGKGEDVQK
配列番号65
M1 209〜237位
IGVLRSLGASQKNGEGIAKDVMEVLKQSS
8種の天然ペプチドおよび8種のフルオロペプチド(本明細書に含めたペプチドリストの配列番号1から65までから選択した)を、固相ペプチド合成(SPPS)によって得た。全てのペプチドは、9−フルオレニルメトキシカルボニル(Fmoc)の標準的化学反応を用いることにより、RinkアミドPEG樹脂上で合成した。ペプチド鎖は、20%ピペリジン/N,N−ジメチルホルムアミドで30分間処理することにより、Fmoc保護基を反復除去し、1,3−ジイソプロピルカルボジイミド/1−ヒドロキシベンゾトリアゾール/N−メチルモルホリンを120分間使用することにより、保護アミノ酸をカップリングすることによって、樹脂上で組み立てた。カップリング効率を調べるために、各カップリングの後でニンヒドリン試験を行った。N末端リシニル残基を付加した後、樹脂ブロックを分割して、(1)樹脂の第1半量上で、N末端リシンのε鎖上に2H,2H,3H,3H−ペルフルオロウンデカン酸のフルオロカーボン鎖(C8F17(CH2)2COOH)を組み込んで、フルオロペプチドを誘導し、(2)樹脂の第2半量上で、N末端リシンのε鎖をアセチル化して天然ペプチドを誘導した。樹脂は、洗浄し、乾燥した後、側鎖保護基を切断、除去するためにK試薬で処理した。粗製ペプチドを冷エーテルから沈殿させ、ろ過により集めた。純度は、RP−HPLCで分析し、全ペプチドについて92%より優れていた。凍結乾燥したフルオロペプチドを窒素下で調製し、−20℃で保存した。保存条件下のフルオロペプチドの安定性は、RP−HPLCおよびLC−MSにより6カ月を超えることが確認された。
8種の凍結乾燥フルオロペプチド(フルオロペプチド1、フルオロペプチド2、フルオロペプチド3、フルオロペプチド4、フルオロペプチド5、フルオロペプチド6、フルオロペプチド7&フルオロペプチド8)、または8種の凍結乾燥天然ペプチド等価物(ペプチド1、ペプチド2、ペプチド3、ペプチド4、ペプチド5、ペプチド6、ペプチド7&ペプチド8)を処方して、非経口用に広範な中性pHを生じる等モル製剤を創製した。
フルオロペプチド1 HMAIIKKYTSGRQEKNPSLRMKWMMAMKYPITADK-NH2
フルオロペプチド2 VAYMLERELVRKTRFLPVAGGTSSVYIEVLHLTQG-NH2
フルオロペプチド3 YITRNQPEWFRNVLSIAPIMFSNKMARLGKGYMFE-NH2
フルオロペプチド4 APIMFSNKMARLGKGYMFESKRMKLRTQIPAEMLA-NH2
フルオロペプチド5 SPGMMMGMFNMLSTVLGVSILNLGQKKYTKTTY-NH2
フルオロペプチド6 KKKSYINKTGTFEFTSFFYRYGFVANFSMELPSFG-NH2
フルオロペプチド7 DQVRESRNPGNAEIEDLIFLARSALILRGSVAHKS-NH2
フルオロペプチド8 DLEALMEWLKTRPILSPLTKGILGFVFTLTVPSER-NH2
6〜8週齢のBALB/cまたはCB6F1(BALB/c×C57BL/6J)雌性マウスをCharles River(UK)および/またはHarlan(UK)から購入した。注射は、1mlのシリンジおよび22−Gの針を用いて皮下に行った。免疫接種は、マウスが、単一の免疫接種(プライム)または2回の免疫接種(プライム/ブースト)のいずれかを受けるように行った。免疫接種は、各注射間に14日の間隔を置いて行った。
フルオロペプチドワクチン(上記のようなフルオロペプチド8種の混合物)の免疫原性を、BALB/cおよびCB6F1マウスにおいて天然ペプチド等価物(上記のような天然ペプチドと称する、非修飾ペプチド8種の混合物)と比較した。この試験では、プライムまたはプライム−ブースト投与計画を用いる両製剤の免疫原性も比較した。両製剤は、BALB/cおよびCBF6マウスにおいてアジュバントなしで皮下に注射した。マウスには、1nmol/フルオロペプチド(フルオロペプチド8種で合計8nmol)を含有するフルオロペプチドワクチンの用量、または1nmol/ペプチド(天然ペプチド8種で合計8nmol)の天然ペプチドワクチン等価物を免疫接種した。ワクチン製剤は、いずれもアジュバントを全く含有していなかった。最終の免疫接種から10日後に、脾臓細胞を10μg/mlの個々の各天然ペプチドで再刺激し、IFN−γELISpotアッセイを用いて評価した。エクスビボでのIFN−γELISpotアッセイ(図1および2)によれば、フルオロペプチドワクチンの免疫原性は、プライム−ブースト免疫投与計画の後、賦形剤単独および天然ペプチドワクチン等価物の両方より優れていた(P<0.001)。この結果は、フルオロペプチドワクチン群の単一免疫接種だけと比較して、プライム−ブースト投与計画を用いたスポット形成細胞数の顕著な増加も実証した(図1および2)。以上の結果は、ペプチド配列に連結されたフルオロカーボン鎖の自己アジュバント性を実証している。
フルオロペプチドワクチン(上記のようなフルオロペプチド8種の混合物)の免疫原性を、BALB/cおよびCB6F1マウスにおいて天然ペプチド等価物(上記のような「天然ペプチド」と称する、非修飾ペプチド8種の混合物)と比較した。この試験では、プライムおよびプライム−ブースト投与計画における両製剤の免疫原性も比較した。両製剤は、BALB/cおよびCB6F1マウスにおいてアジュバントなしで皮下に注射した。マウスには、1nmol/フルオロペプチド(フルオロペプチド8種で合計8nmol)を含有するフルオロペプチドワクチンの用量、1nmol/ペプチド(天然ペプチド8種で合計8nmol)の天然ペプチドワクチン等価物を免疫接種した。ワクチン製剤は、いずれもアジュバントを全く含有していなかった。対照群は、賦形剤単独の免疫接種を受けたマウスからなっていた。免疫接種から10日後に、脾臓細胞を10μg/mlの個々の各天然ペプチドで再刺激し、IFN−γELISpotアッセイを用いて評価した。フルオロペプチドワクチンは、BALB/cマウスにおいてペプチド8種中5種、およびCB6F1マウスにおいてペプチド8種中7種に対するペプチド特異的応答を誘発し、ワクチン(非修飾ペプチド)が誘発する応答より優れている。これは、フルオロペプチドによるワクチン接種が、質的にも量的にも天然ペプチド等価物より優れた免疫応答を誘発できることを実証している。
フルオロペプチドワクチン(上記のようなフルオロペプチド8種の混合物)の免疫原性を、BALB/cおよびCB6F1マウスにおいて天然ペプチド等価物(上記のような非修飾ペプチド8種の混合物)と比較した。製剤は、BALB/cおよびCB6F1マウスにおいてアジュバントなしで皮下に注射した。マウスには、1nmol/フルオロペプチド(フルオロペプチド8種で合計8nmol)を含有するフルオロペプチドワクチンの用量、1nmol/ペプチド(天然ペプチド8種で合計8nmol)の天然ペプチドワクチン等価物を免疫接種した。ワクチン製剤は、いずれもアジュバントを全く含有していなかった。最後の免疫接種から10日後に、脾臓細胞をペプチド1種当たり1μg/mlの天然ペプチド8種の混合物で再刺激した。48時間の刺激後、培養上清を多重化ビーズアッセイ(CBA)によってサイトカインについて評価した。その結果から、CBF6マウスのサイトカインプロファイルは、IFN−γの産生およびTNF−αの有意な産生により支配され、Th1プロファイルを強調することが示されている(図4)。このTh1支配的サイトカインプロファイルは、BALB/cマウスと比較すると、CB6F1マウスに比べてこうしたTh1応答の強度低下(IFN−γELISpotによっても認められる、図1および2を参照)およびTh2サイトカインの増加のために、より顕著となった。とは言え、Th1応答の増強は、天然ペプチド等価物と比較して、フルオロペプチドを免疫接種されたBALB/cマウスにおいて認められた。
IFN−γを産生する、CD4+およびCD8+のペプチド特異的T細胞の頻度に関する情報を得るために、IFN−γに対する細胞内サイトカイン染色を使用した。マウスにフルオロペプチドワクチン(上記のようなフルオロペプチド8種の混合物)を免疫接種し、CD4+またはCD8+脾臓細胞を、天然ペプチド8種の混合物(ワクチン)で短期間刺激した後、フローサイトメトリーによる細胞内サイトカイン染色について評価した。その結果は、フルオロペプチドワクチンでマウスを免疫接種すると、IFN−γを産生する、CD4+およびCD8+双方のペプチド特異的T細胞が、0.5〜2.6%の頻度で誘導できたことを示している(図5)。これによって、フルオロペプチドは、適切なMHCクラスIおよびIIエピトープを含有すれば、MHCクラスIおよびII双方の抗原プロセシングペプチドに会合することが確認される。
フルオロペプチドワクチン(上記のようなフルオロペプチド8種の混合物)の免疫原性を、アジュバントとしてフロイントの完全アジュバント(FCA)の存在下でのフルオロペプチドワクチンの免疫原性と比較した。フルオロペプチドワクチン(1nmol/ペプチド)またはCFA中に乳化したフルオロペプチドワクチン(1nmol/ペプチド)を使用して、BALB/cマウスを免疫接種した。免疫接種から10日後、脾臓細胞を10μg/mlの個別ペプチドで刺激した。48時間後、培養上清を収集し、多重サイトカインアッセイ(CBA)を用いてサイトカインについて試験した。その結果は、CFAを付加的なアジュバントとして使用することにより、Th2サイトカイン(IL−4、IL−5)の産生に影響を与えることなく、Th1サイトカイン(IFN−γおよびIL−2)産生を有意に増強できることを示している(図6)。したがって、フルオロペプチドワクチンの接種で誘発されるTh1応答は、アジュバントとの組合せで免疫中に優先的に増強される。
フルオロペプチドワクチン(上記のようなフルオロペプチド8種の混合物)の免疫原性を、BALB/cマウスにおける皮内または皮下いずれかの投与経路を用いて比較した。免疫接種から10日後、脾臓細胞を10μg/mlの個別ペプチドで刺激し、ELISPOTによってエクスビボでのIFN−γ産生について評価した。その結果は、フルオロペプチドの皮下および皮内の両投与経路は、ロバストな抗原特異的応答の誘発に適切であることを示している(図7)。
Claims (11)
- 3〜8種のインフルエンザペプチド−ベクター構築体を含む、T細胞エピトープの細胞内送達のための医薬組成物であって、
前記インフルエンザペプチドはそれぞれ、15〜40個のアミノ酸の長さを有し、1つまたは複数のT細胞エピトープを含み、
少なくとも1つのインフルエンザペプチドが、PB2、PB1、PA、NP、M1、NS1またはNS2から選択されるインフルエンザA型タンパク質からのペプチドであり、かつ少なくとも1つの第2のインフルエンザペプチドが、PB2、PB1、PA、NPまたはM1から選択されるインフルエンザB型タンパク質からのペプチドであり、
前記構築体が、構造CmFn−CyHx−(Sp)−Rを有するものであり、式中、m=3〜30、n≦2m+1、y=0〜15、x≦2y、(m+y)=3〜30であり、Spは、任意選択の化学スペーサー部分であり、Rは、前記インフルエンザペプチドであり、
前記3〜8種のインフルエンザペプチド−ベクター構築体は、以下のインフルエンザペプチド:
HMAIIKKYTSGRQEKNPSLRMKWMMAMKYPITADK(配列番号1)
及び、以下のインフルエンザペプチド:
YITRNQPEWFRNVLSIAPIMFSNKMARLGKGYMFE(配列番号17)
を含む、医薬組成物。 - 前記Spがリシン残基を含む、請求項1に記載の医薬組成物。
- 前記Rは、複数のエピトープ及び/又は融合ペプチドを含む、請求項1に記載の医薬組成物。
- 前記インフルエンザペプチド−ベクター構築体は、次の構造:
(式中、Spは、任意選択のリンカー部分であり、Rは、前記インフルエンザウイルスペプチドである)
を有するものである、請求項1に記載の医薬組成物。 - 非経口、経口、眼内、直腸、経鼻、経皮、局所もしくは経膣投与のために処方された、または液体、乳濁液、固体、もしくはエアロゾルの形態をした、請求項1に記載の医薬組成物。
- (1)フロイントのアジュバントおよびその誘導体、ムラミルジペプチド(MDP)誘導体、CpGおよびモノホスホリルリピドAなどの天然の細菌成分を自然に、または合成的に誘導して精製したもの、
(2)サポニン、アルミニウム塩およびサイトカインなどのアジュバントまたは増強剤、
(3)水中油アジュバント、油中水アジュバント、免疫賦活複合体(ISCOM)、リポソーム、製剤化ナノおよびマイクロ粒子、ならびに
(4)細菌の毒素およびトキソイド
から選択されるアジュバントを含む、請求項1に記載の医薬組成物。 - 前記3〜8種のインフルエンザペプチド−ベクター構築体が、以下のインフルエンザペプチドからなる群から選択されるインフルエンザペプチドを含む、請求項1に記載の医薬組成物。
VAYMLERELVRKTRFLPVAGGTSSVYIEVLHLTQG(配列番号4)
APIMFSNKMARLGKGYMFESKSMKLRTQIPAEMLA(配列番号18)
SPGMMMGMFNMLSTVLGVSILNLGQKKYTKTTY(配列番号19)
KKKSYINKTGTFEFTSFFYRYGFVANFSMELPSFG(配列番号20)
DQVRESRNPGNAEIEDLIFLARSALILRGSVAHKS(配列番号32)及び
DLEALMEWLKTRPILSPLTKGILGFVFTLTVPSER(配列番号35) - 各インフルエンザペプチドが、少なくとも2つのMHCクラスII結合エピトープを含む、請求項1に記載の医薬組成物。
- 各インフルエンザペプチドが、少なくとも2つのMHCクラスI結合エピトープを含む、請求項1に記載の医薬組成物。
- 前記3〜8種のインフルエンザペプチド−ベクター構築体が、配列番号1、2、3、4、5、6、7、8、9、10、11、12、13、14、15、16、17、18、19、20、21、22、23、24、25、26、27、28、29、30、31、32、33、34、35、36、37、38、39、40、41、42、43、44、45、46、47、48、49、50、51、52、53、54、55、56、57、58、59、60、61、62、63、64及び65からなる群から選択される配列番号のインフルエンザペプチドを含む、請求項1に記載の医薬組成物。
- 前記医薬組成物が、液体、乳濁液、固体、エアロゾルまたは気体の形態である、請求項1に記載の医薬組成物。
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EP2800576A2 (en) | 2012-03-13 | 2014-11-12 | University Of Washington Through Its Center For Commercialization | Polypeptides for treating and/or limiting influenza infection |
CN105101991A (zh) | 2012-09-21 | 2015-11-25 | Pds生物科技公司 | 改进的疫苗组合物和使用方法 |
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