JP5592110B2 - マラリア用ワクチン - Google Patents
マラリア用ワクチン Download PDFInfo
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- JP5592110B2 JP5592110B2 JP2009519964A JP2009519964A JP5592110B2 JP 5592110 B2 JP5592110 B2 JP 5592110B2 JP 2009519964 A JP2009519964 A JP 2009519964A JP 2009519964 A JP2009519964 A JP 2009519964A JP 5592110 B2 JP5592110 B2 JP 5592110B2
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- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K39/002—Protozoa antigens
- A61K39/015—Hemosporidia antigens, e.g. Plasmodium antigens
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- A61K39/12—Viral antigens
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- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
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Description
a. プラスモディウム・ビバックスのCSタンパク質に由来する配列とB型肝炎のS抗原に由来する配列を含む融合タンパク質(CSV-S)、および
b. プラスモディウム・ファルシパルムのCSタンパク質に由来する配列とB型肝炎のS抗原に由来する配列を含む融合タンパク質(RTS)、および場合により
c. B型肝炎ウイルスに由来するS抗原
を含む免疫原性タンパク質粒子を提供する。
配列番号1 N末端の領域I
配列番号2 C末端の領域II
配列番号3-9 I型CSタンパク質の多様な反復ユニット
配列番号10 II型CSタンパク質に由来する大きい方の反復ユニット
配列番号11 アジア株に見られる付加アミノ酸
配列番号12 ハイブリッドタンパク質CSVのヌクレオチド配列
(大腸菌(E Coli)での発現用に最適化)
配列番号13 ハイブリッドタンパク質CSVのアミノ酸配列
配列番号14 II型CSタンパク質に由来する小さい方の反復ユニット
配列番号15 ハイブリッドタンパク質CSVのヌクレオチド配列
(酵母での発現用に最適化)
配列番号16 ハイブリッド融合タンパク質CSV-Sのヌクレオチド配列
配列番号17 ハイブリッド融合タンパク質CSV-Sのアミノ酸配列
配列番号18 RTS発現カセットおよび予測RTS,Sタンパク質のヌクレオチド配 列。
ロードしたサンプル(100μgの全タンパク質/ウェル):
1:Y1631(RTS,S産生株、比較として)
2:Y1835
3:Y1835
4:Y1834
パネルB:抗CSV抗体で示されるウェスタンブロット
ロードしたサンプル(100μgの全タンパク質/ウェル):
1:Y1631(RTS,S産生株、比較として)
2:Y1295
3:Y1835
4:Y1834
5:未報告(nr)(別のCSVS構築物)
6:未報告(nr)(別の構築物-S抗原のみ)
(括弧内は、ロードされた全タンパク質の量)。
2:Y1631(100μg-RTS,S産生株、比較として)
3:Y1845(100μg)
4:Y1845(50μg)
5:Y1845(25μg)
プラスモディウム・ビバックスのI型スポロゾイト周囲タンパク質の中央の反復部分に由来する少なくとも1つの反復ユニット、および
プラスモディウム・ビバックスのII型スポロゾイト周囲タンパク質の中央の反復部分に由来する少なくとも1つの反復ユニット
を含む。
a. プラスモディウム・ビバックスのCSタンパク質に由来する配列を含む融合タンパク質、および
b. プラスモディウム・ファルシパルムのCSタンパク質に由来する配列を含む融合タンパク質
を含む免疫原性タンパク質粒子が提供される。
a) プラスモディウム・ビバックスのCSタンパク質に由来する配列
(例えば、I型および/またはII型の反復領域に由来する配列)
b) プラスモディウム・ファルシパルムのCSタンパク質に由来する配列(例えば、その反復領域に由来する配列)、および
c) B型肝炎のS抗原に由来する配列
を含む融合タンパク質を提供する。
本発明のアデノウイルスベクターは、1つ以上の免疫原性ポリペプチドをコードする1つ以上の異種ポリヌクレオチド(DNA)を含む。
OM174 (2-デオキシ-6-O-[2-デオキシ-2-[(R)-3-ドデカノイルオキシテトラ-デカノイルアミノ]-4-o-ホスホノ-β-D-グルコピラノシル]-2-[(R)-3-ヒドロキシテトラデカノイルアミノ]-α-D-グルコピラノシルジヒドロゲンホスフェート)(WO 95/14026)
OM294 DP(3S,9R)-3-[(R)-ドデカノイルオキシテトラデカノイルアミノ]-4-オキソ-5-アザ-9(R)-[(R)-3-ヒドロキシテトラデカノイルアミノ]デカン-1,10-ジオール,1,10-ビス(ジヒドロゲンホスフェート)(WO99 /64301およびWO 00/0462)
OM197 MP-Ac DP(3S,9R)-3-(R)-ドデカノイルオキシテトラデカノイルアミノ]-4-オキソ-5-アザ-9-[(R)-3-ヒドロキシテトラデカノイルアミノ]デカン-1,10-ジオール,1-ジヒドロゲンホスフェート 10-(6-アミノヘキサノエート)(WO 01/46127)
を含むTLR4アゴニストであると考えられている。
TCC ATG ACG TTC CTG ACG TT (CpG 1826)
TCT CCC AGC GTG CGC CAT (CpG 1758)
ACC GAT GAC GTC GCC GGT GAC GGC ACC ACG
TCG TCG TTT TGT CGT TTT GTC GTT (CpG 2006)
TCC ATG ACG TTC CTG ATG CT (CpG 1668)
TCG ACG TTT TCG GCG CGC GCC G (CpG 5456)
であり、これらの配列は、ホスホロチオエート改変中間ヌクレオチド結合を含み得る。
Y1834株の説明
酵母組換え株Y1834を使用して、融合タンパク質を発現させることができる。この株は、組換え発現ベクターpRIT15546で形質転換されたサッカロミセス・セレヴィシエ宿主株DC5からなる。
酵母発現用の適切なコドン使用頻度を有する合成遺伝子を構築し、pUC57ベクター中にサブクローニングした。結果として得られたプラスミドpUC57/CSVと酵母発現ベクターpGf1-S2は、いずれも適切な酵素で制限消化した。ベクターpGf1-S2は、多段階クローニング法により(GSKにおいて)構築した。既にS発現カセットを含むこのベクターは、B型肝炎ウイルスのS遺伝子とのN末端インフレーム融合などの融合遺伝子の構築を可能とする。配列検証後の最終的な発現ベクターは、pRIT15546と名付けた(図3)。
ロイシンおよびヒスチジン栄養要求性DC5株を、酵母標準プロトコルを用いて組換えプラスミドpRIT15546で形質転換した。形質転換した細胞を、寒天選択プレート上にプレーティングした。1つの形質転換細胞を選択し、Y1834という正式名称を受けた。
Y1834を、30℃において、8μg/mlのヒスチジンをO.D.(620nm)で0.5になるまで補充した、YNB(Yeast Nitrogen Base、Kracker Scientific社から発売)最小培地中で成長させた。その後細胞を回収し、細胞抽出物を調製した。
細胞を破壊緩衝液中で再懸濁し、機械的に破壊する(ガラスビーズ)。抽出物は、5000rpmで15分間遠心分離する。上清画分はSDS-PAGE(4-20%)にかける。
4mM EDTA
Tween20(0.5%)
+プロテアーゼ阻害剤カクテル(Complete/ROCHE社)
細胞濃度: 5mlの破壊緩衝液中に100 mlの培養液(OD:0.5)
= 濃度10 OD単位/ml。
清澄化した抽出物をSDS-PAGE(4-20%)にかけ、タンパク質をニトロセルロース膜に移し、免疫染色に供した。
試薬 = マウスモノクローナル抗体抗S(GSK Biologicalsが製造)-(希釈:1/500)
市販の抗S抗体は、本発明の方法において用いる抗S抗体に代替することができる。別法として抗CSV抗体を使用することができる(例えば国立衛生研究所(NIH)から入手可能な、MR4として知られる抗CSV抗体)。
Y1835株の説明
酵母組換え株Y1835株は、CSV-S融合タンパク質とS抗原とを同時に発現する。CSV-SとSタンパク質を共発現する株を得るため、5個のS発現カセットの組込みコピーを既に含むサッカロミセス・セレヴィシエY1295株を、組換え組込み発現ベクターpRIT15582で形質転換した。
pRIT15582ベクターを構築するために使用した出発物質は、発現プラスミドpRIT15546(図1)であった。このプラスミドの構築は、実施例1に記載される。HindIIIエンドヌクレアーゼを用いたpRIT 15546の消化で、完全長CSV-S発現カセット(pTDH3 + CSV-S + tARG3)に対応する、3706bpの長さのDNAフラグメントを遊離させる。このHindIII DNAフラグメント(T4DNAポリメラーゼで充填した後)を、Tyベースの組込みベクターpRIT13144上の固有のSalIクローニング部位に挿入した(SalI制限消化/T4処理)。結果として得られたプラスミドpRIT15582は、上記の発現カセットに加えて、選択マーカーとして酵母LEU2遺伝子を含む(図3)。XhoIエンドヌクレアーゼを用いたpRIT15582の消化は、内在性Tyエレメントを含む自由端の相同組換えによって酵母ゲノム中に組込み得る、図4に示す8500bpの線状フラグメントを遊離させる。
SとCSV-Sタンパク質の両方を発現する株を得るため、Y1295株を8500bpの線状XhoIフラグメント(図4)で形質転換し、Leu+コロニーを選抜した。様々な割合でゲノム中に存在する、両方の発現カセットのセットを含む幾つかの組込み体を得た。4つのCSV-Sカセットのコピーを含む1つの形質転換体を選択し、正式名称Y1835が与えられた。
Y1835を、30℃で、YNB(Yeast Nitrogen Base、Kracker Scientific社から発売)最小培地中で、O.D.(620nm)が約0.5(0.8)になるまで成長させる。その後細胞を回収し、細胞抽出物を調製する。
抽出物の調製:
細胞を破壊緩衝液中で再懸濁し、機械的に破壊する(ガラスビーズ)。抽出物は、5000rpmで5-10分間遠心分離する。上清画分はSDS-PAGE(12.5%)にかける。
4mM EDTA
Tween20(0.5%)
+プロテアーゼ阻害剤カクテル(Complete/ROCHE社)
細胞濃度: 2.5mlの破壊緩衝液中に100 mlの培養液(OD:0.5)
= 濃度20 OD単位/ml。
組換えタンパク質の検出
清澄化した抽出物をSDS-PAGE(12.5%)にかけ、タンパク質をニトロセルロース膜に移し、免疫染色に供した。
試薬: 1/マウスモノクローナル抗体抗S(GSK Biologicalsにより製造)
-(希釈:1/250)
2/ウサギポリクローナル抗体抗CSV(WRAIRより好意により提供)
-(希釈:1/20,000)。
Y1845株の説明
酵母組換え株Y1845は、CSV-S融合タンパク質、RTS融合タンパク質およびS抗原を同時に発現する。CSV-S、RTSおよびSタンパク質を共発現する株を得るため、5個のS発現カセットの組込みコピーを既に含むサッカロミセス・セレヴィシエY1295株を、pRIT13540組込みベクターとpRIT15582組込みベクターにそれぞれ由来するRTSとCSV-Sの線状DNAフラグメントの等モル溶液で形質転換した。
組込みベクターpRIT13540とpRIT15582を、いずれもXhoIエンドヌクレアーゼで制限し、それぞれ8200bpと8500bpのDNAフラグメントを遊離させた。これらのフラグメントは、内在性Tyエレメントを含む自由端の相同組換えによって酵母ゲノム中に組み込むことができる。
RTS、CSV-SおよびSの3種類のタンパク質を発現する株を得るため、8200bpと8500bpの線状XhoIフラグメントの等モル溶液でY1295株を形質転換し、Leu+コロニーを選抜した。様々な割合でゲノム中に存在する、2つの発現カセットのセットを含む幾つかの組込み体を得た。CSV-Sの4つのコピーとRTSの2つのコピー(Sカセットの5つのコピーに加えて)を含む1つの形質転換体を選択し、正式名称Y1845を与えた。
Y1845を、30℃で、YNB(Yeast Nitrogen Base、Kracker Scientific社から発売)最小培地中で、O.D.(620nm)が0.5になるまで成長させる。その後細胞を回収し、細胞抽出物を調製する。
抽出物の調製:
細胞を破壊緩衝液中で再懸濁し、機械的に破壊する(ガラスビーズ)。抽出物は、5000rpmで5-10分間遠心分離する。上清画分は、SDS-PAGE(12.5%)にかける。
4mM EDTA
Tween20(0.5%)
+プロテアーゼ阻害剤カクテル(Complete/ROCHE社)
細胞濃度: 5mlの破壊緩衝液中に100 mlの培養液(OD:0.5)
= 濃度10 OD単位/ml。
組換えタンパク質の検出
清澄化した抽出物をSDS-PAGE(12.5%)にかけ、タンパク質をニトロセルロース膜に移し、免疫染色に供した。
試薬: マウスモノクローナル抗体抗S(GSK Biologicalsが製造)
-(希釈:1/500)
CSCL密度勾配遠心分離:
Y1845株中での粒子の形成を、CsCl密度勾配遠心分離によって解析した。粗抽出物(全タンパク質のうち20mg以下)を、12mlの1.5 M CsCl勾配上で解析した(Beckman 70.1 Tiローター中で、40.000 rpm、+8℃で88時間)。画分(0.6ml以下)を回収し、抗S抗体を用いた免疫ブロッティングによって解析した。図8に示すように、ウェスタンブロットのピークは浮遊密度1.21および1.20g/cm3に相当する勾配と同じ画分(No.10および11)に現れる。3種類の粒子の形成は、勾配解析によって裏付けられる。
Claims (20)
- 以下の単量体:
a. プラスモディウム・ビバックス(P.vivax)のCSタンパク質に由来する配列とB型肝炎のS抗原に由来する配列を含む融合タンパク質(CSV-S)、および
b. プラスモディウム・ファルシパルム(P. falciparum)のCSタンパク質に由来する配列とB型肝炎のS抗原に由来する配列を含む融合タンパク質(RTS)、および
c. 場合によりB型肝炎のS抗原
を含む免疫原性タンパク質粒子。 - B型肝炎のS抗原がadw血清型に由来する、請求項1に記載の粒子。
- プラスモディウム・ファルシパルムおよび/またはプラスモディウム・ビバックスに由来する1つ以上の他の抗原をさらに含む、請求項1または2に記載の粒子。
- プラスモディウム・ビバックスに由来する1つ以上の他の抗原が、DBP、PvTRAP、PvMSP2、PvMSP4、PvMSP5、PvMSP6、PvMSP7、PvMSP8、PvMSP9、PvAMA1およびRBPから選択されるハイブリッドポリペプチドである、請求項3に記載の粒子。
- プラスモディウム・ビバックスのCSタンパク質が配列番号13に示すアミノ酸配列を有するハイブリッドスポロゾイト周囲タンパク質である、請求項1〜4のいずれか1項に記載の粒子。
- 請求項1〜5のいずれか1項に記載の粒子と、アジュバントとを含む組成物。
- アジュバントが、
金属塩、
水中油型エマルション、
Toll様受容体アゴニスト、
サポニン、
CpGを含むオリゴヌクレオチド、
3D-MPL、
(2-デオキシ-6-o-[2-デオキシ-2-[(R)-3-ドデカノイルオキシテトラ-デカノイルアミノ]-4-o-ホスホノ-β-D-グルコピラノシル]-2-[(R)-3-ヒドロキシテトラデカノイルアミノ]-α-D-グルコピラノシルジヒドロゲンホスフェート)、
DP(3S,9R)-3-[(R)-ドデカノイルオキシテトラデカノイルアミノ]-4-オキソ-5-アザ-9(R)-[(R)-3-ヒドロキシテトラデカノイルアミノ]デカン-1,10-ジオール-1,10-ビス(ジヒドロゲンホスフェート)、および
MP-Ac DP(3S,9R)-3-(R)-ドデカノイルオキシテトラデカノイルアミノ]-4-オキソ-5-アザ-9-[(R)-3-ヒドロキシテトラデカノイルアミノ]デカン-1,10-ジオール-1-ジヒドロゲンホスフェート 10-(6-アミノヘキサノエート)、
またはこれらの組み合わせ
を含む群から選択される、請求項6に記載の組成物。 - アジュバントが:
金属塩と会合したサポニン、
3D MPL、QS21およびCpGオリゴヌクレオチド、
ステロールをさらに含むリポソーム形態のサポニン、
ISCOM、
を含む群から選択される、請求項6または7に記載の組成物。 - プラスモディウム・ファルシパルムおよび/またはプラスモディウム・ビバックスに由来する1つ以上の他の抗原をさらに混合して含む、請求項6〜8のいずれか1項に記載の組成物。
- 組成物が非経口ワクチンである、請求項6〜9のいずれか1項に記載の組成物。
- 治療において使用するための、請求項1〜5のいずれか1項に定義される粒子または請求項6〜10のいずれか1項に定義される組成物。
- マラリアの治療/予防用の医薬の製造のための、請求項1〜5のいずれか1項に定義される粒子または請求項6〜10のいずれか1項に記載の組成物の使用。
- プラスモディウム・ビバックス(P.vivax)のCSタンパク質に由来する配列とB型肝炎のS抗原に由来する配列を含む融合タンパク質(CSV-S)をコードするDNA、プラスモディウム・ファルシパルム(P. falciparum)のCSタンパク質に由来する配列とB型肝炎のS抗原に由来する配列を含む融合タンパク質(RTS)をコードするDNA、および場合によりB型肝炎に由来するS抗原をコードするDNAを含む、発現ベクターもしくはプラスミド。
- プラスモディウム・ビバックス(P.vivax)のCSタンパク質に由来する配列とB型肝炎のS抗原に由来する配列を含む融合タンパク質(CSV-S)をコードするDNA、プラスモディウム・ファルシパルム(P. falciparum)のCSタンパク質に由来する配列とB型肝炎のS抗原に由来する配列を含む融合タンパク質(RTS)をコードするDNA、および場合によりB型肝炎に由来するS抗原をコードするDNAがそれぞれ挿入され、双方の融合タンパク質を、場合によりS抗原と共に発現する、非ヒト宿主。
- 非ヒト宿主中で双方の融合タンパク質と場合によりS抗原とを発現させるステップと、その生成物を回収するステップとを含んでなる、請求項1〜5のいずれか1項に定義される粒子の製造方法。
- 宿主が酵母である、請求項15に記載の方法。
- 酵母が:
サッカロミセス・セレヴィシエ(Saccharomyces cerevisiae)、サッカロミセス・カールスベルゲンシス(S. carlsberoensis)、クリュイベロミセス・ラクティス(K. Lactis)、Y1834およびDC5などの、サッカロミセス(Saccharomyces)、シゾサッカロミセス(Schizosaccharomycees)、クリュイベロミセス(Kluveromyces)、ピキア(Pichia)(ピキア・パストリア(Pichia pastoria)など)、ハンセヌラ(Hansenula)(ハンセヌラ・ポリモルファ(Hansenula polymorpha)など)、ヤロウィア(Yarowia)、シュワニオマイセス(Schwaniomyces)、シゾサッカロミセス(Schizosaccharomyces)、ザイゴサッカロミセス(Zygoaccharomyces)
を含む群から選択される、請求項16に記載の方法。 - 生成物が、界面活性剤を含む組成物を用いた処理による宿主細胞の溶解により回収される、請求項15〜17のいずれか1項に記載の方法。
- 界面活性剤が、Tween、briji、ポリエチレングリコールを含む群から選択される、請求項18に記載の方法。
- 請求項15〜19のいずれか1項に記載の方法によって得られる生成物。
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