JP5283085B2 - 癌診断キットおよび癌診断方法 - Google Patents
癌診断キットおよび癌診断方法 Download PDFInfo
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- JP5283085B2 JP5283085B2 JP2009532105A JP2009532105A JP5283085B2 JP 5283085 B2 JP5283085 B2 JP 5283085B2 JP 2009532105 A JP2009532105 A JP 2009532105A JP 2009532105 A JP2009532105 A JP 2009532105A JP 5283085 B2 JP5283085 B2 JP 5283085B2
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van der Bruggen P, Traversari C, Chomez P, Lurquin C, De Plaen E, van den Eynde B, Knuth A, Boon T.A gene encoding an antigen recognized by cytolytic T lymphocytes on a human melanoma. Science 254: 1643-1647, 1991. Gure AO, Tureci O, Sahin U, Tsang S, Scanlan MJ, Jager E, Knuth A, Pfreundschuh M, Old LJ, Chen YT. SSX: a multigene family with several members transcribed in normal testis and human cancer. Int. J. Cancer 72: 965-971, 1997. Chen YT, Scanlan, MJ, Sahin U, Tureci O, Gure AO, Tsang S, Williamson B, Stockert E, Pfreundschuh M, Old LJ. A testicular antigen aberrantly expressed in human cancers detected by autologous antibody screening. Proc. Natl. Acad. Sci. USA 94: 1914-1918, 1997. Jager E, Gnjatic S, Nagata Y, Stockert E, Jager D, Karbach J, Neumann A, Rieckenberg J, Chen YT, Ritter G, Hoffman E, Arand M, Old LJ, Knuth A. Induction of primary NY-ESO-1 immunity: CD8+ T lymphocyte and antibody responses in peptide-vaccinated patients with NY-ESO-1+ cancers. Proc. Natl. Acad. Sci. USA 97: 12198-12203, 2000. Stockert E, Jager E, Chen YT, Scanlan MJ, Gout I, Karbach J, Arand M, Knuth A, Old LJ. A survey of the humoral immune response of cancer patients to a panel of human tumor antigens. J. Exp. Med. 187: 1349-1354, 1998. Kurashige T, Noguchi Y, Saika T, Ono T, Nagata Y, Jungbluth AA, Ritter G, Chen YT, Stockert E, Tsushima T, Kumon H, Old LJ, Nakayama E. NY-ESO-1 expression and immunogenicity associated with transitional cell carcinoma: correlation with tumor grade. Cancer Res. 61: 4671-4674, 2001. Nakada T, Noguchi Y, Sato S, Ono T, Saika T, Kurashige T, Gnjatic S, Ritter G, Chen YT, Stockert E, Nasu Y, Tsushima T, Kumon H, Old LJ, Nakayama E. NY-ESO-1 mRNA expression and immunogenicity in advanced prostate cancer. Cancer Immunity 3: 10, 2003. Sugita Y, Wada S, Fujita S, Nakata T, Sato S, Noguchi Y, Jungbluth AA, Yamaguchi M, Chen YT, Stockert E, Gnjatic S, Williamson B, Scanlan MJ, Ono T, Sakita I, Yasui M, Miyoshi Y, Tamaki Y, Matsuura N, Noguchi S, Old LJ, Nakayama E, Monden M. NY-ESO-1 expression and immunogenicity in malignant and benign breast tumors.Cancer Res. 64: 2199-2204, 2004. Fujita S, Wada H, Jungbluth AA. Sato S, Nakata T, Noguchi Y, Doki Y, Yasui M, Sugita Y, Yasuda T, Yano M, Ono T, Chen YT, Higashiyama M, Gnjatic S, Old LJ, Nakayama E, Monden M. NY-ESO-1 expression and immunogenicity in esophageal cancer.Clin. Cancer Res. 10: 6551-6558, 2004. Nakamura, S, Nouso K, Noguchi Y, Higashi T, Ono T, Jungbluth AA, Chen YT, Old LJ, Nakayama E, Shiratori Y. Expression and immunogenicity of NY-ESO-1 in hepatocellular carcinoma. J. Gastroenterol. Hepatol. 21: 1281-1285, 2006.
本発明は、癌診断方法を提供する。一実施形態において、本発明に係る癌診断方法は、被験体由来の試料におけるCCDC62の発現レベルを測定し、このレベルをコントロール(例えば、正常レベル)と比較することにより癌を診断する方法である。すなわち、本実施形態に係る癌診断方法は、ポリヌクレオチド測定工程またはポリペプチド測定工程を包含している。CCDC62の発現レベルは、当該分野において公知の手法を用いて転写産物(mRNA)量または翻訳産物(タンパク質)量を測定することにより決定することができる。
一実施形態において、本発明に係る癌診断方法は、被験体由来の試料を用いて癌を診断する方法であって、配列番号1もしくは3に示される塩基配列またはその部分配列を含むポリヌクレオチドが被験体由来の試料中に存在するレベルを測定するポリヌクレオチド測定工程を包含するものであればよい。なお、ポリヌクレオチドにはDNAおよびRNAの両方が含まれる。
一実施形態において、本発明に係る癌診断方法は、被験体由来の試料を用いて癌を診断する方法であって、配列番号2もしくは4に示されるアミノ酸配列またはその部分配列からなるポリペプチドが被験体由来の試料中に存在するレベルを測定するポリペプチド測定工程を包含するものであればよい。
一実施形態において、本発明に係る癌診断方法は、被験体由来の試料を用いて癌を診断する方法であって、配列番号2もしくは4に示されるアミノ酸配列またはその部分配列からなるポリペプチドに特異的に結合する抗体が被験体由来の試料中に存在するレベルを測定する抗体測定工程を包含するものであればよい。
〔2.キット〕
本発明は、癌診断に用いられるキットを提供する。本発明に係るキットは、上述した診断法を実施するに必要な試薬または器具が備えられていればよい。本明細書中において使用される場合、用語「キット」は、特定の材料を内包する容器(例えば、ボトル、プレート、チューブ、ディッシュなど)を備えた包装が意図される。好ましくは試薬または器具の各々を使用するための指示書が備えられている。本明細書中にてキットの局面において使用される場合、「備えた(備えている)」は、キットを構成する個々の容器のいずれかの中に試薬などが内包されている状態が意図される。「指示書」は、紙またはその他の媒体に印刷されていてもよく、あるいは磁気テープ、コンピューター読み取り可能ディスクまたはテープ、CD−ROMなどのような電子媒体に記録されていてもよい。本発明に係るキットは、癌の診断に適用するために必要な試薬または器具があわせて備えられていてもよい。
SEREX法は、図1に概略を示したように、癌患者から摘出した癌組織から直接mRNAを抽出し作製したcDNA発現ライブラリーから、癌患者の血清を用いて癌抗原を検索する方法である。本実施例1では、胃癌の診断に有用な癌・精巣抗原を単離すべく、正常精巣由来のcDNAライブラリーと胃癌患者血清とを用いたSEREX法を実施した。
原発巣および肝転移巣共に縮小傾向を示した胃腺癌患者から血清を得た。なお、この血清は、正常精巣から得たタンパク質画分と強く反応することを予め確認したものを選択した。血清をTBS(Tris-Buffered Saline)で10倍に希釈した後、E.coli Y1090/Y1089のアフィニティーカラム(BioDynamics Lab Inc., Tokyo)を用いて抗バクテリア抗体(大腸菌およびファージに対する非特異的抗体)の吸収処理を行った。
Quick Prep Micro mRNA purification kit (Stratagene, La Jolla, CA, USA)を用いて、正常精巣Total RNA(BD Biosciences Clontech, Palo Alto, CA, USA)からmRNAを精製した。5μgのmRNAよりcDNAを合成し、γZAP Express vector(Stratagene)に組み換えてファージにパッケージングし、cDNA発現ライブラリーを作製した。
150mmプレートあたり約4,000個のファージを蒔き、6〜8時間培養した。IPTGで誘導した蛋白質を直径135mmニトロセルロースメンブラン(Schleicher & Schuell, Dassel, Germany)に転写した後、抗バクテリア抗体を吸収した胃癌患者血清(TBSで200倍に希釈)とさらに15時間反応させ、ペルオキシダーゼ標識抗ヒトIgG抗体(Jackson ImmunoResearch, West Grove, Pa., USA)で検出した。この時、抗体産生細胞に由来するIgGクローンを除去するために、メンブランを予め二次抗体のみで処理した。陽性クローンを単離し、それぞれ直径82mmあるいは47mmのメンブランを用いて2次、3次スクリーニングを行い、単クローン化した。
陽性クローンをin vivoエキシジョンによりpBK−CMVプラスミドにした後、インサートcDNAの塩基配列を解析し(ABI PRISM R310 Genetic Analyzer; PE Applied Biosystems, Foster City, CA, USA)、遺伝子データベース(http://www.ncbi.nih.gov/BLAST/Blast.cgi)によるホモロジー検索を行った。
約20万クローンをスクリーニングした結果、表1に示した55個の陽性クローンを単離した。
CCDC62(variant 1)特異的プライマーとして、
C62-1-S(sense: 5'-TCCCCGGCAAGTGAGCTAAT-3'、配列番号5)
C62-1-AS(antisense: 5'-ATACATCCCCATTCCCGAGG-3'、配列番号6)
CCDC62(variant 2)特異的プライマーとして、
C62-2-S(sense: 5'-AAGTCAGAGGTCCCAGAAGA-3'、配列番号7)
C62-2-AS(antisense: 5'-CTATGCAGGGGTTCTTTCTC-3'、配列番号8)
を、DNA合成機で合成した。ヒト正常組織由来cDNA(MTC panel, BD Biosciences Clontech)および各種癌由来cDNAをRT−PCRによって増幅し、遺伝子の発現を解析した。
CCDC62−1、CCDC62−2、およびもう1種類の同定されたCT抗原であるGKAP1クローンと肺癌患者血清との反応性を、ファージプラークアッセイ法で解析した(図4)。
CCDC62−2タンパク質のC−末端(アミノ酸残基366−684)コードするcDNAをpGEX−6P−1発現ベクターに導入した。これを大腸菌BL21株に形質転換した。IPTGで誘導して得られたGST融合CCDC62−2タンパク質を、GSTrap FFカラム(Amersham Biosciences)を用いて精製した。
Claims (15)
- 配列番号3に示される塩基配列の第2146〜3044位の部分配列を含んでいるプライマーを備えており、該プライマーは、配列番号1に示される塩基配列の第2146〜2481位の部分配列からなるオリゴヌクレオチドではない、癌を診断するためのキット。
- 配列番号4に示されるアミノ酸配列の部分配列からなりかつ配列番号4に示されるアミノ酸配列の第668〜684位を含むポリペプチドを備えており、該ポリペプチドは、配列番号2に示されるアミノ酸配列の部分配列からなるポリペプチドではない、癌を診断するためのキット。
- CCDC62−2タンパク質と特異的に結合するがCCDC62−1タンパク質と結合しない抗体を備えている、癌を診断するためのキット。
- 上皮系腫瘍または皮膚癌の診断に用いられることを特徴とする請求項1〜3のいずれか1項に記載のキット。
- 胃癌、大腸癌、乳癌、頭頸部癌、肺癌、腎癌、前立腺癌および悪性黒色腫から選択される少なくとも1種の診断に用いられることを特徴とする請求項1〜3のいずれか1項に記載のキット。
- 請求項1に記載のキットを用いて、配列番号3に示される塩基配列またはその部分配列を含むポリヌクレオチドが被験体由来の試料中に存在するレベルを測定するポリヌクレオチド測定工程を包含することを特徴とする癌診断を補助するデータを提供する方法。
- 請求項3に記載のキットを用いて、配列番号4に示されるアミノ酸配列またはその部分配列からなるポリペプチドが被験体由来の試料中に存在するレベルを測定するポリペプチド測定工程を包含することを特徴とする癌診断を補助するデータを提供する方法。
- 請求項2に記載のキットを用いて、被験体由来の試料において、配列番号4に示されるアミノ酸配列またはその部分配列からなるポリペプチドに特異的に結合する抗体のレベルを測定する抗体測定工程を包含することを特徴とする癌診断を補助するデータを提供する方法。
- 上皮系腫瘍または皮膚癌の診断に用いられることを特徴とする請求項6〜8のいずれか1項に記載の癌診断を補助するデータを提供する方法。
- 胃癌、大腸癌、乳癌、頭頸部癌、肺癌、腎癌、前立腺癌および悪性黒色腫から選択される少なくとも1種の診断に用いられることを特徴とする請求項6〜8のいずれか1項に記載の癌診断を補助するデータを提供する方法。
- 上記プライマーが、配列番号7および8のいずれかに示される塩基配列からなる、請求項1に記載のキット。
- 上記ポリペプチドが、配列番号4に示されるアミノ酸配列の第366〜684位からなる、請求項2に記載のキット。
- 上記抗体が、配列番号4に示されるアミノ酸配列の第366〜684位からなるポリペプチドによって惹起される、請求項3に記載のキット。
- 上皮系腫瘍または皮膚癌の診断に用いられることを特徴とする請求項11〜13のいずれか1項に記載のキット。
- 胃癌、大腸癌、乳癌、頭頸部癌、肺癌、腎癌、前立腺癌および悪性黒色腫から選択される少なくとも1種の診断に用いられることを特徴とする請求項11〜13のいずれか1項に記載のキット。
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JPN6008052066; Science, (2006), 314, [5797], p.268-274 * |
JPN6008052066; Science, (2006), 314, [5797], p.268-274(特にTable S4) * |
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