JP2009022186A - 抗原ペプチドおよびその利用 - Google Patents
抗原ペプチドおよびその利用 Download PDFInfo
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- JP2009022186A JP2009022186A JP2007187324A JP2007187324A JP2009022186A JP 2009022186 A JP2009022186 A JP 2009022186A JP 2007187324 A JP2007187324 A JP 2007187324A JP 2007187324 A JP2007187324 A JP 2007187324A JP 2009022186 A JP2009022186 A JP 2009022186A
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Abstract
【解決手段】特定のアミノ酸配列を含んでいるペプチド,該ペプチドによって惹起される抗体,該ペプチドを有しているA型インフルエンザウイルスに対するワクチン,該ペプチドをコードするポリヌクレオチド,該ポリヌクレオチドが作動可能に連結されている発現ベクター。
【選択図】なし
Description
本発明は、A型インフルエンザウイルスの複数のサブタイプを交差認識し得る抗体を惹起し得るペプチドを提供する。
上述したように、本発明に係るペプチドまたはポリヌクレオチドを用いれば、A型インフルエンザウイルスの複数のサブタイプを交差認識し得る抗体を得ることができる。すなわち、本発明は、A型インフルエンザウイルスの複数のサブタイプを交差認識し得る抗体を提供する。本発明に係る抗体は少なくともH1型サブタイプおよびH3型サブタイプを認識する。
上述したように、本発明に係るペプチド、ポリヌクレオチドおよび抗体は、A型インフルエンザウイルスに対するワクチンの有効成分となり得る。すなわち、本発明は、A型インフルエンザウイルスに対するワクチンを提供する。
各サブタイプ間のhomology解析に、NBCI(National Center for Biotechnology Information)のInfluenza Virus Resourceに登録されている配列を用いた。H1型として1994〜2005年にヒトから分離された64株、H2型として1900〜2005年にヒトから分離された13株、H3型として1990〜2005年に日本でヒトから分離された7株および2003〜2005年に日本以外(主に米国)でヒトから分離された144株、ならびにH5型として1900〜2005年にヒトから分離された118株の配列をこのデータベースから抽出して用いた。複数のサブタイプを交差認識する抗体を惹起し得ると考えられるペプチド配列を、複数設計した。
HPLC精製条件
・システム:島津製作所製 LC−10Ai
・流速 9.0 ml/min
・カラム ワイエムシィ社製 YMC−Pack ODS−AM 20×150mm
・検出波長 210nm
・グラジエント 移動相A:0.1N HCl
移動相B:アセトニトリル
・分取時のグラジエント条件:20分間にB20〜40%。
続いて、キャリアタンパク質としてBSAを用い、架橋剤にEMCSを用いるMBS法によって、ペプチドとキャリアタンパク質との複合体化を行った。
上記2に従ってキャリアタンパク質と複合体化させたペプチドを免疫原として用いてBalb/Cマウス(雌)の免疫を行った。2週間間隔での4回の腹部皮下への免疫を繰り返し、尾静脈からの最終免疫の3日後に、ポリエチレングリコールによる細胞融合法を定法に従って行い、A型インフルエンザウイルスに対するモノクローナル抗体を作製した。抗体の選択、得られた抗体の免疫学的性質の検討を、主にELISA法によって行った。
細胞融合から約3日後にHAT培地(約100μl)を添加した。その7日後にコロニーを確認し得たウエルについて1次スクリーニングを行った。次いで、限界希釈法に従って2次スクリーニングを行った。スクリーニングおよびクローニングを繰り返した後に、InfAペプチドに対するマウスモノクローナル抗体を8クローン確立した。得られたモノクローナル抗体の重鎖可変領域(VH)および軽鎖可変領域(VL)の配列(アミノ酸配列およびコードする塩基配列)を、それぞれ配列番号2および3(VH)、配列番号4および5(VL)に示す。また、得られた抗体のアイソタイプは6クローンがIgG1(κ)であり2クローンがIgG2b(κ)あった(表1参照)。
得られた抗体の免疫学的反応性を、ELISAおよびウエスタンブロッティングに調べた。InfAペプチド(配列番号6)以外に、HA領域のペプチドであるHAcペプチド(配列番号7)およびIAHペプチド(配列番号8)、ならびにgp41−1の高度保存領域からなるTP41−1ペプチド(配列番号9)を使用した(表2参照)。HA以外のタンパク質として、BSA、THY、HSA、KLHおよびヘモグロビンを使用した。
さらに、H1型ウイルス(H1N1)およびH3型ウイルス(H3N2)の破砕液を用いたウエスタンブロッティングを行い、得られた抗体のHAに対する反応性を調べた。H1型ウイルスに対する結果を図2に示し、H3型ウイルスに対する結果を図3に示す。また、それぞれの図において、還元したウイルスをサンプルに用いた結果を上段に示し、還元していない(非還元の)ウイルスをサンプルに用いた結果を下段に示した。ポジティブコントロールとして、HA2と反応することが知られているJN1−1抗体およびJN1−2抗体を用いた。
Claims (11)
- 配列番号1に示されるアミノ酸配列を含んでいる、ペプチド。
- 請求項1に記載のペプチドを有している、A型インフルエンザウイルスに対するワクチン。
- 請求項1に記載のペプチドをコードする、ポリヌクレオチド。
- 請求項3に記載のポリヌクレオチドが作動可能に連結されている、発現ベクター。
- 請求項3に記載のポリヌクレオチドを有している、A型インフルエンザウイルスに対するワクチン。
- 請求項3に記載のポリヌクレオチドが導入されている形質転換体を用いる工程を包含する、ペプチド作製方法。
- A型インフルエンザウイルスのヘマグルチニンタンパク質のH1型サブタイプおよびH3型サブタイプを交差認識する、抗体。
- 配列番号1に示されるアミノ酸配列からなるペプチドを特異的に認識する、請求項7に記載の抗体。
- 重鎖可変領域(VH)が、
(1)配列番号2に示されるアミノ酸配列、または
(2)配列番号2に示されるアミノ酸配列において、1または数個のアミノ酸が置換、欠失、挿入、および/または付加されたアミノ酸配列
を含み、
軽鎖可変領域(VL)が、
(3)配列番号4に示されるアミノ酸配列、または
(4)配列番号4に示されるアミノ酸配列において、1または数個のアミノ酸が置換、欠失、挿入、および/または付加されたアミノ酸配列
を含む、請求項7に記載の抗体。 - 請求項7〜9のいずれか1項に記載の抗体を有している、A型インフルエンザウイルスに対するワクチン。
- 請求項7〜9のいずれか1項に記載の抗体を用いる、A型インフルエンザウイルスを検出する方法。
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JP2011160681A (ja) * | 2010-02-05 | 2011-08-25 | Japan Science & Technology Agency | A型インフルエンザのヘマグルチニンに対する抗体およびその利用 |
JP2016539314A (ja) * | 2011-12-12 | 2016-12-15 | ノバルティス アーゲー | インフルエンザウイルス血球凝集素のためのアッセイ法 |
JP2018064580A (ja) * | 2009-05-26 | 2018-04-26 | アイカーン スクール オブ メディシン アット マウント サイナイ | 周期的投与によって作製されたインフルエンザウイルスに対するモノクローナル抗体及びその使用 |
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JP2011160681A (ja) * | 2010-02-05 | 2011-08-25 | Japan Science & Technology Agency | A型インフルエンザのヘマグルチニンに対する抗体およびその利用 |
JP2016539314A (ja) * | 2011-12-12 | 2016-12-15 | ノバルティス アーゲー | インフルエンザウイルス血球凝集素のためのアッセイ法 |
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