JP4447641B2 - 虫垂炎を診断するための方法およびデバイス - Google Patents
虫垂炎を診断するための方法およびデバイス Download PDFInfo
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Description
本願は、2004年7月23日付で出願した米国仮特許出願番号60/590,631に対して優先権を主張する。
本発明は、患者における虫垂炎を診断するための方法を提供し、この方法は、その患者における標準的な少なくとも1つの虫垂炎の症状を同定する工程;およびその患者の体液サンプルまたは組織サンプルにおける虫垂炎と示差的に関連する少なくとも1つの分子の存在を同定する工程を包含する。虫垂炎の診断は困難であり、それゆえにしばしば誤診を招くものと当該分野では認識されている。したがって、本明細書において使用される場合、用語「虫垂炎を診断する(診断すること;診断する工程)」は、通常の精度よりも良好な精度で虫垂炎を診断することを意味する。しかし、実際のところ、本発明の方法は、正確な診断という改善を提供することが示されるだけでなく、偽陽性および偽陰性についてもなきに等しい。
虫垂(vermiform appedix)は、大腸からも小腸からも独立した器官として認識されている。下行結腸の基部から指の形状した小袋として延びており、これは、盲嚢とも呼ばれている。この虫垂は、小腸や大腸にように、中空であって、それらと同じような3つの組織層から構成されている。これらの三層は、粘膜、筋層、漿膜である。この虫垂の管腔は、盲嚢の管腔と円形の開口部(os)を介して連結されており、この開口部を通じて、その虫垂は、その分泌物を糞便流に加える。これらの分泌物は、その虫垂の粘膜から産生される過剰な粘液である。この粘液を含むことに加えて、その虫垂は、右結腸では一般的である多くの細菌を含む。その虫垂の管腔の閉塞は、急性虫垂炎を生じる主要な要因である。糞石は虫垂閉塞の通例の原因であるが、肥大したリンパ組織、以前に受けたX線検査によるバリウムの濃化、野菜および果物の種子、および回虫のような腸内寄生虫もまた、虫垂の管腔を閉塞させてしまう可能性がある。
本研究の目的は、早期の急性虫垂炎を診断するための決定行例に対して一助となる組織特異的マーカーを同定することであった。プロテオームスクリーニングを使用して、急性虫垂炎の場合に特異的に上方制御(アップレギュレート)された虫垂に存在するタンパク質を同定した。MRP−8/14を、急性虫垂炎患者の患部である虫垂および血清の両方おいて存在したものとして同定した。
「標本および血清の収集」 本研究において記録対象とした全ての患者を、その患者の治療医師により規定される容認された標準的患者管理に従って処置した。発明者らの研究において算入されるあたり診断に先立って、全ての患者は、外科医により評価を受け、その外科医により虫垂炎を患っていると診断された。これらの虫垂炎患者に対するその治療外科医の治療計画として、即時虫垂切除が含まれていた。抗生物質の使用、外科的手技(開腹手術または腹腔鏡を用いる手術のいずれかのもの)のような全ての処置における詳細は、個々の外科医によって決定された。
「虫垂炎患者に由来する虫垂組織に存在するタンパク質の同定」 示差的プロテオーム解析を、急性虫垂炎を患った患者において増大したタンパク質を同定する目的で、除去処理した(depleted)血清サンプルについて実施した。この分析は、正常であった患者に由来するサンプルと穿孔した虫垂を有した患者に由来するサンプルを比較することを伴った。血液サンプルを、外科手術の直前に得た。本研究において正常である治療を受けた者は、腹部の疼痛を示して外科手術を受けたが虫垂が正常であったことが判明したものである。正常である虫垂組織と患部である虫垂組織は、外科手術の間に収集した。
血清および虫垂組織のプロテオームスクリーニングを使用して、発明者らは、ハプトグロビンが、急性虫垂炎を有する患者において上方制御されることを決定した。このハプトグロビンのαサブユニットは、この疾患に関するスクリーニングにおける特に有用なマーカーである。
標本および血清の収集、虫垂炎組織の処理、抽出した組織サンプルの2Dゲル分析および抽出した虫垂組織サンプルのウエスタンブロット分析を、実施例1に記載したように実施したが、但し、ウエスタンブロット分析については、アフィニティ精製した抗ヒトハプトグロビン(Rockland, 600−401−272)を、1次抗体として0.5×uniblockにて1:5000希釈溶液で使用し;そして二次抗体は、ペルオキシダーゼ抗ウサギIgG (h+l)であり、uniblockにより1:5000希釈溶液でアフィニティ精製(vector,pi−1000)した。
「虫垂炎患者に由来する虫垂組織において存在するタンパク質の同定」 示差的プロテオーム解析を、急性虫垂炎を患った患者において増大したタンパク質を同定する目的で、除去処理した血清サンプルについて実施した。この分析は、正常であった患者に由来するサンプルと穿孔した虫垂を有した患者に由来するサンプルを比較することを伴った。血液サンプルを、外科手術の直前に得た。本研究において正常である治療を受けた者は、腹部の疼痛を示して外科手術を受けたが虫垂が正常であったことが判明したものである。正常である虫垂組織と患部である虫垂組織は、外科手術の間に収集した。
この実施例のバリエーションにおいて、体液サンプルとしては、全血、血清または血漿が挙げられる。このサンプルは、虫垂切除の直前にヒト患者から回収した全血である。その標本は、氷上に静置され、そして、研究室へと輸送される。次いで、この血液は、15分間に亘って3000rpmで遠心分離することによって処理される。次いで、血漿を。別の容器に注ぎ込むことにより分離した。
組織サンプルは、虫垂炎(AP)患者および非虫垂炎(NAP)患者から収集される。好ましくは、その組織は、虫垂である。このAPまたはNAPの組織サンプルは、必要に応じてプールされ、AP組織プールまたはNAP組織プールを生成する。このAP組織サンプルおよびNAP組織サンプルの各々は、全てのRNAおよび/またはmRNAの単離のための供給源として使用される。単離する場合、そのAP−RNAおよびNAP−RNAは、別々に維持され、cDNAの調製のために使用される。
全血を、虫垂切除の直前に虫垂炎との疑いある患者から取る。その標本を、氷上に静置して、臨床実験室に輸送した。次いで、この血液は、15分間に亘って3000rpmで遠心分離することによって処理される。次いで、血漿を。別の容器に注ぎ込むことにより分離した。
Claims (23)
- 患者由来の血液、血清または血漿サンプル中の虫垂炎に関連する分子を検出する方法であって、該患者は、該患者の血液、血清または血漿中の上昇したMRP−8/14タンパク質の存在に関連する阻害状態を有さず、該阻害状態は、移植したばかりの同種移植片、敗血症、髄膜炎、肺炎、結核、慢性関節リウマチ、消化器癌、炎症性腸疾患、皮膚癌、歯周炎、子癇前症、およびAIDSからなる群より選択され、該方法は、
該患者の血液、血清または血漿サンプルにおけるMRP−8/14タンパク質の量を測定する工程、
を包含し、該サンプルにおける10μg/mlのMRP−8/14タンパク質より多い量の存在が、該患者が虫垂炎であることを示す、方法。 - 前記サンプルが血液サンプルである、請求項1に記載の方法。
- 前記サンプルが血清サンプルである、請求項1に記載の方法。
- 前記サンプルにおけるハプトグロビンの存在を検出する工程をさらに包含し、ここで、125mg/dLより多い量のその存在が、前記患者が虫垂炎であることをさらに示す、請求項1に記載の方法。
- ハプトグロビン、プラスミノゲンアクチベータインヒビタ−1、核内因子κβ(NFκβ)、特異的虫垂抗原(HLA−DR)、および前述のもののいずれかをコードする核酸からなる群より選択される少なくとも1つの第二の分子の存在を、前記患者が虫垂炎であることを示す前記サンプルにおいて検出する工程をさらに包含する、請求項1に記載の方法。
- 前記MRP−8/14が、免疫学的アッセイにおいて測定されることを特徴とする、請求項1に記載の方法。
- 前記サンプルが血液サンプルである、請求項6に記載の方法。
- サンプルにおける11μg/mlより多い量のMRP−8/14タンパク質の存在が、前記患者が虫垂炎であることを示す、請求項1に記載の方法。
- サンプルにおける13μg/mlより多い量のMRP−8/14タンパク質の存在が、前記患者が虫垂炎であることを示す、請求項1に記載の方法。
- サンプルにおける15μg/mlより多い量のMRP−8/14タンパク質の存在が、前記患者が虫垂炎であることを示す、請求項1に記載の方法。
- サンプルにおける20μg/mlより多い量のMRP−8/14タンパク質の存在が、前記患者が虫垂炎であることを示す、請求項1に記載の方法。
- 前記サンプルは血漿サンプルである、請求項1に記載の方法。
- 前記サンプルは血清サンプルである、請求項6に記載の方法。
- 前記サンプルは血漿サンプルである、請求項6に記載の方法。
- 前記免疫学的アッセイが、前記MRP−8/14タンパク質に特異的な抗体を含み、前記検出する工程は、該抗体と前記サンプルとを接触させること、および該MRP−8/14タンパク質の該抗体との結合を検出することを含む、請求項6に記載の方法。
- 前記MRP−8/14に特異的な前記抗体は、MRP−8/14複合体に特異的である、請求項15に記載の方法。
- 前記抗体は27e10である、請求項16に記載の方法。
- 前記免疫学的アッセイは、アッセイデバイスにおいて実施される、請求項6に記載の方法。
- 前記免疫学的アッセイは、アッセイデバイスにおいて実施される、請求項15に記載の方法。
- 前記アッセイデバイスは、カートリッジ型または試験紙型を有する、請求項18に記載の方法。
- 前記アッセイデバイスは、カートリッジ型または試験紙型を有する、請求項19に記載の方法。
- 前記患者由来のサンプルにおける血漿粘度の増加を検出する工程もまた包含する、請求項1に記載の方法。
- 前記患者のサンプル由来の白血球を検出する工程もまた包含する、請求項1に記載の方法。
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| PCT/US2005/026218 WO2006012588A2 (en) | 2004-07-23 | 2005-07-25 | Methods and devices for diagnosis of appendicitis |
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