JP7173965B2 - 試料中の非結合C5aの定量化方法 - Google Patents
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Description
本出願は配列表を含んでおり、該配列表はASCIIフォーマットで電子的に提出されたものであり、かつその全体が参照により本明細書に援用される。このASCIIコピーは2017年10月18日に作成され、1900-427PCT_SL.txtという名称であり、サイズは22,607バイトである。
a.試料からヒトC5を除去することであって、試料を、磁気ビーズに結合したC5特異的ビオチン化抗体と共にインキュベートし、ヒトC5に結合したC5特異的ビオチン化抗体に結合した該磁気ビーズを磁石で捕捉することと、
b.ストレパビジン(strepavidin)被覆粒子に対して、ビオチン化抗C5a捕捉抗体を結合させることであって、前記ビオチン化抗C5a捕捉抗体は、ストレパビジン被覆粒子を含むカラムを備えるGyros Bioaffy 200 CDに毛細管作用によって付着して、該CDがGyrolab xPloreまたはGyrolab XP機器内で遠心力を受けることによって、ビオチン化抗C5a捕捉抗体が、カラム中のストレパビジン被覆粒子へと動かされることと、
c.試料中の遊離(非結合)C5aを捕捉抗体上で捕捉することであって、工程aの後の試料が毛細管作用によってCDに付着して、前記CDがGyrolab xPloreまたはGyrolab XP機器内で遠心力を受けることによって、工程aの後の試料が、カラム中のストレパビジン被覆粒子上に結合したビオチン化抗C5a捕捉抗体へと動かされることと、
d.捕捉された遊離C5aを検出することであって、アレクサフルオール(AlexaFluor)標識抗C5a検出抗体が、毛細管作用によってCDに付着して、前記抗C5a検出抗体が、捕捉抗体によって結合されるエピトープとは異なるエピトープにおいてC5aに結合し、前記CDがGyrolab xPloreまたはGyrolab XP機器内で遠心力を受けることによって、検出抗体が、カラム中のストレパビジン被覆粒子に結合された捕捉抗体に結合された遊離C5aへと動かされることと、
e.レーザー誘発蛍光検出を使用して捕捉された遊離C5aを定量化することと、を含む。
a.試料からヒトC5を除去することであって、試料を、磁気ビーズに結合したC5特異的ビオチン化抗体と共にインキュベートし、ヒトC5に結合したC5特異的ビオチン化抗体に結合した該磁気ビーズを磁石で捕捉することと、
b.ストレパビジン(strepavidin)被覆粒子に対して、ビオチン化抗C5a捕捉抗体を結合させることであって、前記ビオチン化抗C5a捕捉抗体は、ストレパビジン被覆粒子を含むカラムを備えるGyros Bioaffy 200 CDに毛細管作用によって付着して、該CDがGyrolab xPloreまたはGyrolab XP機器内で遠心力を受けることによって、ビオチン化抗C5a捕捉抗体が、カラム中のストレパビジン被覆粒子へと動かされることと、
c.試料中の遊離(非結合)C5aを捕捉抗体上で捕捉することであって、工程aの後の試料が毛細管作用によってCDに付着して、前記CDがGyrolab xPloreまたはGyrolab XP機器内で遠心力を受けることによって、工程aの後の試料が、カラム中のストレパビジン被覆粒子に結合したビオチン化抗C5a捕捉抗体へと動かされることと、
d.捕捉された遊離C5aを検出することであって、アレクサフルオール(AlexaFluor)標識抗C5a検出抗体が、毛細管作用によってCDに付着して、前記抗C5a検出抗体が、捕捉抗体によって結合されるエピトープとは異なるエピトープにおいてC5aに結合し、前記CDがGyrolab xPloreまたはGyrolab XP機器内で遠心力を受けることによって、検出抗体が、カラム中のストレパビジン被覆粒子に結合された捕捉抗体に結合された遊離C5aへと動かされることと、
e.レーザー誘発蛍光検出を使用して捕捉された遊離C5aを定量化することと、を含む。
特定の実施形態では、例えば以下の項目が提供される。
(項目1)
試料からの遊離(非結合)ヒトC5a補体タンパク質(C5a)を定量化する方法であって、前記方法が、
a.前記試料からヒトC5を除去することであって、前記試料を、磁気ビーズに連結したC5特異的ビオチン化抗体と共にインキュベートし、ヒトC5に結合したC5特異的ビオチン化抗体に連結した前記磁気ビーズを磁石で捕捉することと、
b.ストレパビジン(strepavidin)被覆粒子に対して、ビオチン化抗C5a捕捉抗体を結合させることであって、前記ビオチン化抗C5a捕捉抗体は、前記ストレパビジン被覆粒子を含むカラムを備えるGyros Bioaffy 200 CDに毛細管作用によって添加されて、前記CDがGyrolab xPloreまたはGyrolab XP機器内で遠心力を受けることによって、前記ビオチン化抗C5a捕捉抗体が、前記カラム中の前記ストレパビジン被覆粒子へと動かされることと、
c.前記試料中の前記遊離(非結合)C5aを前記捕捉抗体上で捕捉することであって、工程aの後の前記試料が毛細管作用によって前記CDに添加されて、
前記CDが前記Gyrolab xPloreまたはGyrolab XP機器内で遠心力を受けることによって、前記工程aの後の前記試料が、前記カラム中の前記ストレパビジン被覆粒子上に結合した前記ビオチン化抗C5a捕捉抗体へと動かされることと、
d.捕捉された遊離C5aを検出することであって、アレクサフルオール(AlexaFluor)標識抗C5a検出抗体が、毛細管作用によって前記CDに添加されて、前記抗C5a検出抗体が、前記捕捉抗体によって結合されるエピトープとは異なるエピトープにおいてC5aに結合し、前記CDが前記Gyrolab xPloreまたはGyrolab XP機器内で遠心力を受けることによって、前記検出抗体が、前記カラム中の前記ストレパビジン被覆粒子に結合した前記捕捉抗体に結合した前記遊離C5aへと動かされることと、
e.レーザー誘発蛍光検出を使用して前記捕捉された遊離C5aを定量化することと、を含む、方法。
(項目2)
工程cから得た値を、項目1の方法を使用してC5a枯渇試料に添加した既知の量のC5aから作成した標準曲線と比較することによって、遊離C5a抗体の濃度または量を計算することをさらに含む、項目1記載の方法。
(項目3)
Gyros Evaluatorソフトウェアを用いて遊離C5抗体の濃度を計算することをさらに含む、項目1または2に記載の方法。
(項目4)
前記試料がヒト患者から得られる、項目1から3のいずれか一項に記載の方法。
(項目5)
前記試料が血清試料または血漿試料である、項目4記載の方法。
(項目6)
患者が抗C5a抗体で治療されている、項目1から5のいずれか一項に記載の方法。
(項目7)
前記患者がALXN1007で治療されている、項目6記載の方法。
(項目8)
前記磁気ビーズがDynabead磁気ビーズである、項目1から7のいずれか一項に記載の方法。
(項目9)
前記C5特異的抗体が、ビオチン化N19/8である、項目1から8のいずれか一項に記載の方法。
(項目10)
前記ビオチン化捕捉抗体がALXN1007である、項目1から9のいずれか一項に
記載の方法。
(項目11)
前記抗C5a検出抗体がクローン2942である、項目1から10のいずれか一項に記載の方法。
(項目12)
試料の希釈に、Rexxip AN緩衝液または1M NaCl/0.5% Tween 20緩衝液が使用され、前記検出抗体の希釈に、Rexxip F緩衝液が使用される、項目1から11のいずれか一項に記載の方法。
(項目13)
前記Gyros機器を、Bioaffy wash 1およびpH11緩衝液を用いて別個に二回プライミングすることをさらに含む、項目1から12のいずれか一項に記載の方法。
KAFTECCVVASQLRANISHKDMQLGR(配列番号17)を有するヒトC5aタンパク質に結合することができる。別の実施形態では、抗C5a抗体またはその抗原結合断片は、以下のアミノ酸配列:TLQKKIEEIAAKYKHSVVKKCCYDGACVNNDETCEQRAARISLGPRCIKAFTECCVVASQLRANISHKDMQLG(配列番号18)を有する脱アルギニン化(desarginated)したヒトC5aタンパク質に結合する。本明細書に記載される抗C5a抗体、またはその抗原結合断片は、完全長ヒトC5aおよび脱アルギニン化ヒトC5aの両方に結合することができる。
a.試料からヒトC5を除去することであって、試料を、磁気ビーズに結合したC5特異的ビオチン化抗体と共にインキュベートし、ヒトC5に結合したC5特異的ビオチン化抗体に結合した該磁気ビーズを磁石で捕捉することと、
b.ストレパビジン(strepavidin)被覆粒子に対して、ビオチン化抗C5a捕捉抗体を結合させることであって、前記ビオチン化抗C5a捕捉抗体は、ストレパビジン被覆粒子を含むカラムを備えるGyros Bioaffy 200 CDに毛細管作用によって付着して、該CDがGyrolab xPloreまたはGyrolab XP機器内で遠心力を受けることによって、ビオチン化抗C5a捕捉抗体が、カラム中のストレパビジン被覆粒子へと動かされることと、
c.試料中の遊離(非結合)C5aを捕捉抗体上で捕捉することであって、工程aの後の試料が毛細管作用によってCDに付着して、前記CDがGyrolab xPloreまたはGyrolab XP機器内で遠心力を受けることによって、工程aの後の試料が、カラム中のストレパビジン被覆粒子上に結合したビオチン化抗C5a捕捉抗体へと動かされることと、
d.捕捉された遊離C5aを検出することであって、アレクサフルオール(AlexaFluor)標識抗C5a検出抗体が、毛細管作用によってCDに付着して、該抗C5a検出抗体が、捕捉抗体によって結合されるエピトープとは異なるエピトープにおいてC5aに結合し、前記CDがGyrolab xPloreまたはGyrolab XP機器内で遠心力を受けることによって、検出抗体が、カラム中のストレパビジン被覆粒子に結合された捕捉抗体に結合された遊離C5aへと動かされることと、
e.レーザー誘発蛍光検出を使用して捕捉された遊離C5aを定量化することとを含む。
Claims (12)
- 試料からの遊離(非結合)ヒトC5a補体タンパク質(C5a)を定量化する方法であって、前記方法が、
a.前記試料からヒトC5を除去することであって、前記試料を、磁気ビーズに連結したC5特異的ビオチン化抗体と共にインキュベートし、ヒトC5に結合したC5特異的ビオチン化抗体に連結した前記磁気ビーズを磁石で捕捉することと、
b.ストレプトアビジン被覆粒子に対して、ビオチン化抗C5a捕捉抗体を結合させることであって、前記ビオチン化抗C5a捕捉抗体は、前記ストレプトアビジン被覆粒子を含むカラムを備えるGyros Bioaffy 200 CDに毛細管作用によって添加されて、前記CDがGyrolab xPloreまたはGyrolab XP機器内で遠心力を受けることによって、前記ビオチン化抗C5a捕捉抗体が、前記カラム中の前記ストレプトアビジン被覆粒子へと動かされることと、
c.前記試料中の前記遊離(非結合)C5aを前記捕捉抗体上で捕捉することであって、工程aの後の前記試料が毛細管作用によって前記CDに添加されて、
前記CDが前記Gyrolab xPloreまたはGyrolab XP機器内で遠心力を受けることによって、前記工程aの後の前記試料が、前記カラム中の前記ストレプトアビジン被覆粒子上に結合した前記ビオチン化抗C5a捕捉抗体へと動かされることと、
d.捕捉された遊離C5aを検出することであって、アレクサフルオール(AlexaFluor)標識抗C5a検出抗体が、毛細管作用によって前記CDに添加されて、前記抗C5a検出抗体が、前記捕捉抗体によって結合されるエピトープとは異なるエピトープにおいてC5aに結合し、前記CDが前記Gyrolab xPloreまたはGyrolab XP機器内で遠心力を受けることによって、前記検出抗体が、前記カラム中の前記ストレプトアビジン被覆粒子に結合した前記捕捉抗体に結合した前記遊離C5aへと動かされることと、
e.レーザー誘発蛍光検出を使用して前記捕捉された遊離C5aを定量化することと、を含む、方法。 - 工程cから得た値を、請求項1の方法を使用してC5a枯渇試料に添加した既知の量のC5aから作成した標準曲線と比較することによって、遊離C5a抗体の濃度または量を計算することをさらに含む、請求項1記載の方法。
- 前記試料がヒト患者から得られる、請求項1から2のいずれか一項に記載の方法。
- 前記試料が血清試料または血漿試料である、請求項3記載の方法。
- 患者が抗C5a抗体で治療されている、請求項1から4のいずれか一項に記載の方法。
- 前記患者がALXN1007で治療されている、請求項5記載の方法。
- 前記磁気ビーズがDynabead磁気ビーズである、請求項1から6のいずれか一項に記載の方法。
- 前記C5特異的抗体が、ビオチン化N19/8である、請求項1から7のいずれか一項に記載の方法。
- 前記ビオチン化捕捉抗体がALXN1007である、請求項1から8のいずれか一項に記載の方法。
- 前記抗C5a検出抗体がクローン2942である、請求項1から9のいずれか一項に記載の方法。
- 試料の希釈に、1M NaCl/0.5% Tween 20緩衝液が使用される、請求項1から10のいずれか一項に記載の方法。
- 前記Gyros機器を、0.1% Tween 20、0.02%アジ化ナトリウムを含むPBSおよびpH11緩衝液を用いて別個に二回プライミングすることをさらに含む、請求項1から11のいずれか一項に記載の方法。
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WO2018075761A1 (en) | 2018-04-26 |
US11828683B2 (en) | 2023-11-28 |
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