JP5265257B2 - 犬crp及び人crpを認識する抗体 - Google Patents
犬crp及び人crpを認識する抗体 Download PDFInfo
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- JP5265257B2 JP5265257B2 JP2008170284A JP2008170284A JP5265257B2 JP 5265257 B2 JP5265257 B2 JP 5265257B2 JP 2008170284 A JP2008170284 A JP 2008170284A JP 2008170284 A JP2008170284 A JP 2008170284A JP 5265257 B2 JP5265257 B2 JP 5265257B2
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Description
本発明によればさらに、受託番号FERM P−21571を有するハイブリドーマが産生するモノクローナル抗体又はその断片が提供される。
本発明によればさらに、受託番号FERM P−21571を有するハイブリドーマが提供される。
本発明によればさらに、上記した本発明のモノクローナル抗体又はその断片で標識したラテックス試薬を含む、犬CRP及び人CRP測定用免疫分析試薬が提供される。
本発明によればさらに、酵素で標識した上記した本発明のモノクローナル抗体又はその断片を含む、犬CRP及び人CRP測定用免疫分析試薬が提供される。
好ましくは、酵素は枯草菌αアミラーゼである。
好ましくは、酵素は枯草菌αアミラーゼである。
本発明のモノクローナル抗体は、犬CRPと人CRPを認識するモノクローナル抗体であって、犬CRPと人CRPに対する結合定数107M-1〜109M-1を有し、サブクラスがIgG1であるモノクローナル抗体であり、好ましくは受託番号FERM P−21571を有するハイブリドーマが産生するモノクローナル抗体である。なお、本発明で言う抗体とは、抗体分子全体を意味するのみならず、その断片(例えば、Fab、F(ab')2又はFab'断片)をも意味する。
(1) 支持体上に試薬層、その上に免疫反応層を有するもの。
(2) 支持体上に試薬層、基質層、免疫反応層をこの順に有するもの。
(3) 支持体上に試薬層、接着層、免疫反応層をこの順に有するもの。
(4) 支持体上に試薬層、接着層、基質層、免疫反応層をこの順に有するもの。
(5) 支持体上に検出層、試薬層、免疫反応層をこの順に有するもの。
(6) 支持体上に検出層、試薬層、基質層、免疫反応層をこの順に有するもの。
(7) 支持体上に試薬層、光反射層、免疫反応層をこの順に有するもの。
(8) 支持体上に試薬層、光反射層、基質層、免疫反応層をこの順に有するもの。
(9) 支持体上に検出層、試薬層、光反射層、免疫反応層をこの順に有するもの。
(10)支持体上に検出層、試薬層、光反射層、基質層、免疫反応層をこの順に有するもの。
(11)支持体上に検出層、光反射層、試薬層、免疫反応層をこの順に有するもの。
(12)支持体上に検出層、光反射層、試薬層、基質層、免疫反応層をこの順に有するもの。
(13)支持体上に第2試薬層、光反射層、第1試薬層、免疫反応層をこの順に有するもの。
(14)支持体上に第2試薬層、光反射層、第1試薬層、基質層、免疫反応層をこの順に有するもの。
(15)支持体上に検出層、第2試薬層、光反射層、第1試薬層、免疫反応層をこの順に有するもの。
(16)支持体上に検出層、第2試薬層、光反射層、第1試薬層、基質層、免疫反応層をこの順に有するもの。
(1)抗体産生用融合細胞(ハイブリドーマ)の調製:
ビーグル犬の新鮮な血清からアフィニティーカラムを用いて分離、精製した犬CRPを抗原として、マウス(BALBc)に免疫し、犬CRPおよび人CRPにたいする抗体価の上昇を確認後、脾細胞を採取してミエローマ(P3U1)とPEG法で細胞融合させた。HAT培地による選択培養し、増殖したハイブリドーマを多数得た。
上記(1)で得たハイブリドーマの培養上澄について、犬CRP及び人CRPの2種の蛋白抗原をそれぞれ1 μg/mLとなるようPBS(-)で希釈し固相を行い、2次抗体として抗マウスIgG HRP標識ヤギ抗体(Goat anti-mouse IgG (H+L) HRP conjugated secondary antibody:No.AP308P フナコシ(株))を用いてマイクロプレートを用いた ELISA法により、各抗原に対する反応性を確認し、犬CRP及び人CRPの2種の抗原の片方にのみ又は共通に反応する抗体を産生するハイブリドーマを数種選別できた。また、これらのハイブリドーマについて、培養上澄中の抗体のアイソタイプ及びサブクラスは、市販の同定キット試薬を用いて同定した。
犬・人CRPに対する反応性が確認された培養上澄の内、産生抗体がIgGであるものについて、Biacore社の装置(Biacore3000)を用いて、その結合定数を測定した。センサーチップに抗マウスIgGのウサギIgGを固定化し、これと培養上澄とを一定条件で接触させ、培養上澄中のマウスIgGを固定する。次いで、目標とする結合定数109M-1に対し、4μg/mL(3.5×10-8M)の各抗原蛋白質を接触させる。培養上澄を接触させた時のシグナル増加(抗体シグナル:培養上澄中のIgG量に相当)を基準にして、抗原蛋白質を接触させた時のシグナル増加(抗原シグナル:抗体の抗原捕捉力に相当)の比を取ると培養上澄中の抗体の結合定数の序列が推定できる。培養上澄の測定結果を表1に示す。因みに、表1の最下段の抗体FH-01は、結合定数が2×108M-1の人CRPにのみ特異性を持つ抗体である。また、Kdの概算値を表2に示す。FH01の抗原/抗体シグナル比(以下シグナル比とする)0.738に対して、ハイブリドーマ16H4の培養上澄の抗体は、犬CRPに対してシグナル比0.887を示し、FH01同等以上の結合定数が期待される。また、16H4の抗体は、同じ条件下で人CRPに対しても、シグナル比0.234を示し、FH01よりは、若干弱いが、充分な結合定数を持つと期待される。三種類のハイブリドーマ3A6、11C6、16H4を用いて、マウス腹水法で調製後、プロテインAカラムで精製した抗体での同条件下のシグナル比は、培養上澄と良く一致しており、培養上澄での結果が抗体選別に有効である事を示している。この方法により、犬CRPと人CRPに対して充分な結合定数107M-1〜109M-1を有し、且つ、サブクラスがIgG1である抗体産生ハイブリドーマとしてハイブリドーマ16H4を選別することができた。また、犬CRPのみと反応する抗体を産生するハイブリドーマとして6A3、11C6を得た。
ハイブリドーマ16H4をRPMI 1640 + 10 % FBSで融解し培養し、増殖させた細胞をマウス20匹にそれぞれ0.5 mL(5 × 10^6 cells/匹)移植する。一定期間の後に、腹腔から腹水を採取して遠心分離後、上澄を以下に示すプロテイン A-アフィニティクロマト法で精製する。1.5 Mグリシン-NaOH (pH 8.9)-3 M NaClで平衡化したプロテインAカラムに、同じ緩衝液で希釈した腹水の上澄を流しIgGを吸着させる。溶出バッファ(100 mM クエン酸バッファ 、pH 3.0) で溶出し、直ちに、中和液(2 M Tris - HCl、pH 9.0)を添加 して pH 7.0〜7.5に調整後、PBSに透析して精製抗体を得た。
特許第3151080号に記載の方法と同様の方法を用いて、枯草菌αアミラーゼと上記ハイブリドーマ16H4が産生した抗犬/人CRP・IgGFab'を調製した。
ゼラチン下塗りされている180μmのポリエチレンテレフタレ−ト無色透明平滑フィルムに下記組成の水溶液を、乾燥後の厚さが14μmになるように塗布し乾燥した。 ゼラチン 14.1 g/m2
ペルオキシダーゼ 12.0 KU/m2
グルコースオキシダーゼ 6.0 KU/m2
グルコアミラーゼ 5.0 KU/m2
ロイコ色素 0.5 g/m2
界面活性剤 1.0 g/m2
ゼラチン 10.2 g/m2
界面活性剤 0.5 g/m2
ヒドロキシプロピルセルロ−ス 4.7 g/m2
カルボキシメチルスターチ 3.5 g/m2
PIPES 0.9 g/m2
マンニトール 2.3 g/m2
界面活性剤 1.2 g/m2
上記布地上に、エタノールを200g/m2となるように塗布し(=OC1塗布)乾燥後、下記組成のエタノール溶液を各々の成分が下記の量となるように、そして乾燥後の厚さが5μmになるように、塗布し(=OC2塗布)、乾燥させ、一体型多層分析要素を作製した。
アミラーゼ標識抗C反応性蛋白マウス抗体 14.0 KU/m2
抗C反応性蛋白マウス第二抗体 6.2 mg/m2
ポリビニルピロリドン 5.6 g/m2
界面活性剤 0.2 g/m2
下記組成(*)の希釈液と免疫比濁法にて検定されたCRP濃度0,1.1,3.0,7.1,11,30,71mg/dLの人血清を希釈液にて21倍希釈した液を上記実施例で作製したCRP分析用乾式スライドに10μL点着する。
MES *1 5mg
カゼイン水溶液 *2 100mg
アジ化ナトリウム 0.2mg
精製水 1.0ml
*1 MES:2−(N−モルホリノ)エタンスルフォン酸モノハイドレート
*2 例えば 商品名:ブロックエース
CRP 0.0mg/dL(希釈液) 0.193 0.197
CRP 1.1mg/dL 0.167 0.141
CRP 3.0mg/dL 0.141 0.121
CRP 7.1mg/dL 0.127 0.116
CRP 11mg/dL 0.091 0.118
CRP 30mg/dL 0.081 0.113
CRP 71mg/dL 0.072 0.111
Claims (9)
- 受託番号FERM BP−11132を有するハイブリドーマが産生するモノクローナル抗体、又はFab’フラグメント、F(ab’) 2 フラグメント若しくはFabフラグメントから選択されるその断片。
- 受託番号FERM BP−11132を有するハイブリドーマ。
- 請求項1に記載のモノクローナル抗体又はその断片を含む、犬CRP及び人CRP測定用免疫分析試薬。
- 請求項1に記載のモノクローナル抗体又はその断片で標識したラテックス試薬を含む、犬CRP及び人CRP測定用免疫分析試薬。
- 酵素で標識した請求項1に記載のモノクローナル抗体又はその断片を含む、犬CRP及び人CRP測定用免疫分析試薬。
- 酵素が枯草菌αアミラーゼである、請求項5に記載の犬CRP及び人CRP測定用免疫分析試薬。
- 酵素で標識した請求項1に記載のモノクローナル抗体又はその断片を含む、犬CRP及び人CRP測定用乾式分析要素。
- 酵素が枯草菌αアミラーゼである、請求項7に記載の犬CRP及び人CRP測定用乾式分析要素。
- 請求項3から6の何れかに記載の犬CRP及び人CRP測定用免疫分析試薬、あるいは請求項7又は8に記載の犬CRP及び人CRP測定用乾式分析要素に、試料を接触させることを含む、試料中のCRPの測定方法。
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CN109917130A (zh) * | 2018-10-26 | 2019-06-21 | 成都普利泰生物科技有限公司 | 一种犬crp的化学发光免疫检测试剂盒 |
CN112574304B (zh) * | 2019-09-30 | 2022-11-04 | 东莞市朋志生物科技有限公司 | 一种抗c反应蛋白的抗体 |
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