JP5061194B2 - Gp73特異的自己抗体を検出するための方法およびアッセイ - Google Patents
Gp73特異的自己抗体を検出するための方法およびアッセイ Download PDFInfo
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Description
種々のGP73タンパク質、ポリペプチド、および化学的類似体が、GP73特異的自己抗体の検出のためのGP73抗原として本発明において用いるのに適している。1つの態様において、GP73抗原は、ヒツジ、ウシ、反芻動物、ブタ、ウマ、イヌ、ネコ、齧歯類、または霊長類(例えばヒト)を含むが、これらに限定されない任意の種に由来するGP73タンパク質またはその断片である。GP73タンパク質は、天然源から精製されても良く、あるいは、タンパク質工学技術を用いて作製されても良いが、これは、天然源からのタンパク質と比較して、異なる翻訳後修飾を有し得る。本発明において、組換えGP73タンパク質は、当業者によく知られた標準的な分子生物学プロトコールを用いて作製される。
本発明で用いるのに適する多くの異なる種類の免疫分析法が存在する。例えば酵素結合免疫吸着検定法(ELISA)、蛍光免疫吸着検定法(fluorescent immunosorbent assay; FIA)、化学結合免疫吸着検定法(chemical linked immunosorbent assay; CLIA)、放射線免疫測定法(RIA)、免疫ブロット法、ゲル拡散沈降反応、免疫拡散法、in situ免疫分析法(例えば、金コロイド、酵素標識、または放射性同位体標識を用いる)、ウエスタンブロット法、沈降反応、凝集法(例えば、ゲル凝集法、赤血球凝集法など)、補体結合法、免疫蛍光測定法、プロテインA測定法(protein A assays)、および免疫電気泳動法などの、よく知られている免疫分析法のいずれもが、GP73抗原と反応するサンプル中のGP73特異的自己抗体のレベルを検出するのに適合され得る。使用され得る異なる免疫分析法を概観するためには、The Immunoassay Handbook(David Wild編, Stockton Press, New York, 1994)を参照されたい。固相分離または抗体試験についての免疫定量法を伴う競合的免疫分析法は、本発明で使用するのに特に適している。The Immunoassay Handbookの第2章を参照されたい。
本発明において、コンピューター支援分析プログラムはまた、検出アッセイによって生じた生データを、臨床医にとって予測価値のあるデータに変換するのに用いられ得る。臨床医は、任意の適切な手段を用いて、予測データに容易にアクセスすることができる。臨床医はその後、対象の治療を最適化するために、その情報を直ちに利用することができる。
GP73特異的自己抗体の存在のみを測定することに加えて、本発明はまた、1以上の他の検体(例えばGP73抗原、および/またはCOMPなど)と共にGP73特異的自己抗体を測定する「パネル分析法」を企図する。このようなパネル分析法は、2以上の別々のアッセイプラットフォームを含むキットとして提供されても良く、あるいは、例えば免疫分析ストリップまたはELISAプレートなどの単一のプラットフォーム上に組み合わされても良い。
GP73タンパク質
誘導性GP73発現プラスミド(St. Louis University, St. Louis, MOから入手されるBACG81)を標準的な方法で増殖させた。手短に、グリセロール ストックをLB/amp(Luria-Bertaniブロス/アンピシリン)寒天プレート上に画線した。単一コロニーを選択し、LBブロスに接種した。所望の細胞密度が得られるまで、細胞を培養および増殖させた。IPTG(イソプロピル-1-チオ-β-D-ガラクトピラノシド)を添加し、細胞をおよそ4時間インキュベーションした。その後、細胞を遠心分離により回収した。回収された細胞ペレット中のGP73の存在は、SDS PAGE分析により確認された。組換えHisタグ付加GP73は、標準的な方法を用いて単離された。基本的に、GP73は変性条件下でペレットにより抽出され、GP73タンパク質は、ニッケルカラムを通すことにより溶解物から精製された。タンパク質は、イミダゾール緩衝溶液を用いてカラムから溶出された。精製された組換えGP73タンパク質は、十分に透析することにより、イミダゾールから遊離した。
臨床上の記載が様々な肝臓疾患(ウイルス性肝炎および非ウイルス性肝炎を含む)に罹患している個体からの血清が、GP73特異的自己抗体、ならびにGP73抗原、軟骨オリゴマーマトリックスタンパク質(COMP)、および肝臓疾患の他のマーカーの存在について試験された。
COMPは、AnaMar Medical(Uppsala, Sweden)から販売されている市販のキットを用いて分析された。GP73抗原は、捕捉ELISA法により検出された。GP73特異的自己抗体は、GP73自己抗体ELISAを用いて測定された。
GP73自己抗体(抗GP73)の検出の有用性は、3箇所の臨床センターからの血清について評価された。第1臨床群は、肝硬変に罹患している22人の患者、HCCに罹患している10人の患者、およびHCVに罹患している9人の患者から構成され、St. Louis University(St. Louis, MO)から得られた。39人の健康な対照もまた、評価された。図1および表1に示されるように、抗GP73抗体は各群において検出され得るが、0.5 O.D.を上回る値の頻度は、健康な対照群におけるわずか3%の頻度と比較して、肝臓疾患血清中では23〜44%に渡っていた。
1. Kladney, R. D.ら, "GP73, a novel Golgi-localized protein upregulated by viral infection" Gene 249, 53-65 (2000)
2. Iftikhar, R.ら, "Disease- and cell-specific expression of GP73 in human liver disease" Am. J. Gastroenterol. 99, 1087-95 (2004)
3. Kladney, R. D.ら, "Expression of GP73, a resident Golgi membrane protein, in viral and nonviral liver disease" Hepatology 35, 1431-40 (2002)
4. Block, T. M.ら, "Use of targeted glycoproteomics to identify serum glycoproteins that correlate with liver cancer in woodchucks and humans" Proc. Natl. Acad. Sci. U.S.A. 102, 779-84 (2005)
5. Kladney, R. D.ら, "Upregulation of the Golgi protein GP73 by adenovirus infection requires the ElA CtBP interaction domain" Virology 301, 236-46 (2002)
6. Marrero, J. A.ら, "GP73, a resident Golgi glycoprotein, is a novel serum marker for hepatocellular carcinoma" J. Hepatol. 43, 1007-12 (2005)
Claims (1)
- a)ゴルジ膜タンパク質73(GP73タンパク質)を準備するステップと、
b)前記GP73タンパク質を患者由来の血清または血漿サンプルと反応させるステップと、
c)前記サンプル中のGP73自己抗体を検出するステップ
とを含む、肝臓疾患を有することが疑われる患者のGP73特異的自己抗体のレベルを検出するための方法。
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| PCT/US2007/022644 WO2008060394A2 (en) | 2006-10-27 | 2007-10-26 | Methods and assays for detecting gp73-specific autoantibodies |
| US11/977,826 | 2007-10-26 |
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| JP2010520987A JP2010520987A (ja) | 2010-06-17 |
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| ES2535640T3 (es) * | 2008-07-18 | 2015-05-13 | Boston Medical Center Corporation | Diagnósticos para nefropatía membranosa |
| CN101735319B (zh) * | 2008-11-20 | 2011-10-26 | 北京热景生物技术有限公司 | 一种抗gp73蛋白的单克隆抗体、其制备方法和应用 |
| CA2808611A1 (en) * | 2009-08-28 | 2011-03-03 | Inova Diagnostics, Inc. | Detecting circulating cartilage oligomeric matrix protein in liver cirrhosis |
| CN102232949A (zh) | 2010-04-27 | 2011-11-09 | 孙远 | 提高药物溶出度的组合物及其制备方法 |
| CN102081100B (zh) * | 2010-07-20 | 2015-06-24 | 李伯安 | 一种肝癌多标志物微阵列试剂盒、其制备方法及其应用 |
| US9469686B2 (en) | 2013-03-15 | 2016-10-18 | Abbott Laboratories | Anti-GP73 monoclonal antibodies and methods of obtaining the same |
| CN103604918A (zh) * | 2013-11-28 | 2014-02-26 | 中国科学院广州生物医药与健康研究院 | 一种发光底物及应用和含该发光底物的检测试剂盒 |
| CN104215761B (zh) * | 2014-08-27 | 2016-04-20 | 广西医科大学 | 检测血清中抗gp73抗体的试剂盒 |
| CN104360080B (zh) * | 2014-12-05 | 2016-03-02 | 重庆乾德生物技术有限公司 | 一种高尔基体糖蛋白-73检测试剂盒 |
| CN107345967A (zh) * | 2016-05-05 | 2017-11-14 | 中国医学科学院基础医学研究所 | Gp73蛋白作为血清标记物在诊断癌症中的用途 |
| CN109765378B (zh) * | 2016-08-31 | 2022-06-03 | 鲁凤民 | 一种新的肝硬化或肝纤维化标志物 |
| CN111413502B (zh) * | 2017-04-27 | 2022-10-14 | 北京大学 | Gp73的新用途及一种基于其的肝组织炎症活动度检测试剂盒 |
| CN110869387A (zh) * | 2017-07-13 | 2020-03-06 | 马格雷股份有限公司 | 自身抗体的定量方法 |
| CN107746430B (zh) * | 2017-10-19 | 2021-03-23 | 天津金虹生物科技开发有限公司 | 一种gp73 c端抗原的制备及其应用 |
| CN110865192A (zh) * | 2019-11-21 | 2020-03-06 | 安徽大千生物工程有限公司 | 一种基于胶乳增强免疫比浊法测定gp73的试剂盒及其制备使用方法 |
| CN111273033A (zh) * | 2020-03-05 | 2020-06-12 | 北京森美希克玛生物科技有限公司 | 一种高尔基体蛋白73的测定试剂盒及其化学发光测定方法 |
| CN114813686B (zh) * | 2022-05-06 | 2024-04-19 | 桂林电子科技大学 | 一种基于NGQDs-MoS2@RGO结合适配体检测GP73的方法 |
| CN115754290A (zh) * | 2022-09-26 | 2023-03-07 | 浙江大学 | 一种用于检测早期肝癌的试剂盒 |
| CN115825184B (zh) * | 2022-12-09 | 2024-05-07 | 桂林电子科技大学 | 一种基于纳米复合材料和适配体用于检测高尔基体蛋白73的电化学传感器 |
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| WO1997023782A1 (en) * | 1995-12-22 | 1997-07-03 | Abbott Laboratories | Fluorescence polarization immunoassay diagnostic method |
| US5885529A (en) * | 1996-06-28 | 1999-03-23 | Dpc Cirrus, Inc. | Automated immunoassay analyzer |
| EP1096957A1 (en) * | 1998-06-18 | 2001-05-09 | Johns Hopkins University School of Medicine | Methods and reagents for intramuscular delivery of nucleic acids |
| JP2003532078A (ja) * | 2000-04-19 | 2003-10-28 | リサーチ コーポレイション テクノロジーズ,インコーポレイテッド | 子宮内膜症の診断アッセイ |
| AU2002332041A1 (en) * | 2001-10-05 | 2003-04-22 | Human Genome Sciences, Inc. | Albumin fusion proteins |
| DE602004024549D1 (de) * | 2003-09-05 | 2010-01-21 | Univ Jefferson | Diagnose und überwachung von hepatozellulärem karzinom |
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