JP7391980B2 - 乳がんのバイオマーカとしてのbmmf1 repタンパク質の使用 - Google Patents
乳がんのバイオマーカとしてのbmmf1 repタンパク質の使用 Download PDFInfo
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- G—PHYSICS
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- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
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- G01N33/574—Immunoassay; Biospecific binding assay; Materials therefor for cancer
- G01N33/57407—Specifically defined cancers
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- G—PHYSICS
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- G01N2333/00—Assays involving biological materials from specific organisms or of a specific nature
- G01N2333/435—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans
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Description
このような抗Rep抗体群の例を表1に示す:
すべての組織サンプルは、組織バンクの規定及びハイデルベルク大学倫理委員会の承認に基づき、国立腫瘍疾患センター(NCT、ハイデルベルク、ドイツ、ハイデルベルク大学病院病理学研究所)の組織バンクから提供された。
パラフィン包埋組織切片(約4μm厚)を,EDTAエピトープ回収(Sigma E1161)後、Zytomed Chem-Plus HRP Polymer-Kit(Zytomed、POLHRP-100)及びDAB Substrate Kit High Contrast(Zytomed、DAB500plus)を用いて,所定の抗体インキュベーション(表2参照)及びヘマトキシリン対比染色で染色した。スライドはデジタルスライドスキャナー(浜松)でスキャンし、NDP.view2Plusソフトウェア(浜松)を用いて解析した。
組織マイクロアレイZTMA26は、チューリッヒ大学の提供により作成された。このデータセットには、患者ごとに1つの腫瘍組織スポットが含まれている。ZTMA26の染色はBOND MAX機(ライカバイオシステムズ)でEDTAエピトープリトリーバルバッファー(Abcam, #ab93680)を用いて全自動で行った。一次抗体抗BMMF1 Rep(#3-6, monoclonal, DKFZ Heidelberg)とアイソタイプコントロール抗体(Biolegend IgG1, MG1-45)を室温で30分間インキュベートした(4μg/ml)。二次ウサギ抗マウス(Abcam #125904)を室温で20分間インキュベートした。検出は、DABクロモゲンとヘマトキシリン対比染色を含むBond Polymer Refine Detection Kit(Leica #DS9800)を用いて行った。スライドは浜松のNanozoomerスライドスキャナー(浜松)でスキャンし、NDP.view2 Plusソフトウェア(浜松)で解析した。
組織マイクロアレイ(TMA)上のBMMF1 Rep染色の解析では、抗体染色は、染色された細胞の割合(陽性率)と、組織スポットの間質/間隙部分におけるシグナルの強度(I)の2つのパラメータに基づいて特徴付けられた。上皮部分や腫瘍細胞は、一般的にBMMFの陽性化の対象ではないため、解析には含めなかった。BMMF1 Rep染色の陽性度(POS)は、3段階で評価した。0は全く陽性の組織部分がないことを示し、1は1~10%の陽性、2は11~30%の陽性、3は30%以上の陽性細胞が組織スポットの複数の領域に分布していることを示した。強度(I)は以下のように評価した。0=検出されない、1=中程度、2=強い染色。統計解析のため、免疫反応性スコア(IRS)を以下のように算出した。IRS=IxPOS;最小値=0、最大値=6(表2)。
IRS=免疫反応性スコア
これらのスクーリング基準を用いて、BMMF1 Rep染色に基づく腫瘍周囲組織(16名の患者)のサンプルは
12%の陰性(IRS 0)
88%が陽性(IRS1以上)[うち44%が有意に陽性=IRS2以上]
これらの結果は、図5に棒グラフで示されている。
Claims (5)
- 乳がんのバイオマーカとしての、MSBI1ゲノムにコードされたRepタンパク質(MSBI1 Rep)の使用。
- 配列番号1のアミノ酸1~136、137~229及び230~324からなる群より選択されるアミノ酸配列内にあるエピトープに結合する抗Rep抗体によって、対象からの組織サンプル中の、MSBI1ゲノムにコードされたRepタンパク質(MSBI1 Rep)を検出するステップを含む、前記対象における乳がんの診断又は素因を提供するための方法。
- 前記抗Rep抗体が、配列番号2又は配列番号3に含まれるエピトープに結合する、請求項2に記載の方法。
- 対象からの組織サンプルが、癌性乳房組織、癌性組織を取り囲む周囲組織及び(良性)過形成からなる群から選択される、請求項2又は3に記載の方法。
- さらに、CD68陽性細胞が抗CD68抗体によってサンプル中で検出される、請求項2~4のいずれかに記載の方法。
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EP19158845.8A EP3699595A1 (en) | 2019-02-22 | 2019-02-22 | Use of bmmf1 rep protein as a biomarker for breast cancer |
PCT/EP2020/054613 WO2020169796A1 (en) | 2019-02-22 | 2020-02-21 | Use of bmmf1 rep protein as a biomarker for breast cancer |
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EP (2) | EP3699595A1 (ja) |
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AU (1) | AU2020225036A1 (ja) |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2016005054A2 (en) | 2014-07-10 | 2016-01-14 | Deutsches Krebsforschungszentrum | Hcbi, msbi, mssi and cmi sequences as an early marker for the future development of cancer and diseases of the cns and as a target for the treatment and prevention of these diseases |
WO2019008052A1 (en) | 2017-07-07 | 2019-01-10 | Deutsches Krebsforschungszentrum | IMPROVED REP PROTEIN FOR USE IN A DIAGNOSIS ASSAY |
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EP3653702A1 (en) * | 2018-11-15 | 2020-05-20 | Deutsches Krebsforschungszentrum, Stiftung des öffentlichen Rechts | Crystal structure of a replication protein encoded by a plasmid isolated from a multiple sclerosis patient |
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