JP2018535432A - 転移性去勢抵抗性前立腺癌(mCRPC)患者における治療選択のためのバイオマーカーとしてのアンドロゲン受容体バリアント7 - Google Patents
転移性去勢抵抗性前立腺癌(mCRPC)患者における治療選択のためのバイオマーカーとしてのアンドロゲン受容体バリアント7 Download PDFInfo
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Abstract
【選択図】図1A
Description
前立腺癌(PC)は、依然米国における最も一般的な非皮膚癌である。2014年だけでも、前立腺癌の予測される発生数は233,000症例であり、男性29,480名が死亡に至るとされ、このことは転移性前立腺癌療法をまさに満たされない医学的必要性のあるものとしている。Siegelらの文献、2014. CA Cancer J Clin. 2014;64(1):9-29。欧州の疫学的研究は、2012年の、新規症例416700例の推定発生数に匹敵するデータを示し、これは男性における癌診断の22.8%を占めている。合計で92200例のPCに特定される死亡が予想され、これは男性の最も可能性のある死因となる3種の癌の一つであり、死亡率は9.5%である。
本開示は、療法の変更が必要とされる進行性mCRPC患者由来の試料を利用する、全てのCTC亜型を含む、固定された単独CTCにおいて使用するためのAR-V7免疫蛍光試験を説明している。
本開示は、全般的診断的ワークフローに関して設計されたプラットフォーム上の療法の変更が必要とされる進行性mCRPC患者からの試料を利用する、全てのCTC亜型を含む、固定された単独CTCにおける使用のためのAR-V7免疫蛍光試験を説明している。
(実施例1) mCRPC患者のCTC中のAR-V7スプライスバリアントの存在は、アンドロゲン受容体シグナル伝達指向型療法(ARS Tx)に勝る、タキサン療法による改善されたPSA反応を伴う患者を特定する。
Claims (24)
- アンドロゲン受容体(AR)標的療法と比べ、タキサン療法に対し改善された反応を伴う転移性去勢抵抗性前立腺癌(mCRPC)患者を特定する方法であって:
(a)患者から得られた血液試料中の有核細胞の免疫蛍光染色及び形態学的特徴決定を含む直接分析を実行し、循環腫瘍細胞(CTC)データを作製する工程であって、この分析が、該細胞中のアンドロゲン受容体バリアント7(AR-V7)の存在を検出することを含む、前記工程;並びに
(c)このCTCデータを評価し、アンドロゲン受容体シグナル伝達-指向型(ARS-指向型)療法と比べ、タキサン療法に対し改善された反応を伴うmCRPC患者を特定する工程を含む、前記方法。 - 前記ARS-指向型療法と比べタキサン療法に対し改善された反応を伴うmCRPC患者が、CTC中のAR-V7の核局在化を基に特定される、請求項1記載の方法。
- 前記AR-V7の核局在化が、ARS-指向型療法に対する抵抗性に対応している、請求項2記載の方法。
- 前記AR-V7の核局在化が、ARS-指向型療法と比べ、タキサン療法に対する有益な反応に対応している、請求項2記載の方法。
- 前記核局在化が、隣接白血球(WBC)からのバックグラウンド染色よりも3倍以上高いシグナル強度を伴う、染色パターンを含む、請求項2記載の方法。
- ARS-指向型療法と比べ、タキサン療法に対し改善された反応を有すると特定された場合に、患者はタキサン療法により治療される追加工程(d)を含む、請求項1記載の方法。
- スライド上に単層として有核細胞を沈着する初期工程をさらに含む、請求項1記載の方法。
- 前記直接分析が、走査型蛍光顕微鏡検査を含む、請求項1記載の方法。
- 前記顕微鏡検査が、CTC及び少なくとも200個の周囲の白血球(WBC)を含む視野を提供する、請求項8記載の方法。
- 前記CTCが、周囲の有核細胞と比べ識別できる形態学的特徴を含む、請求項1記載の方法。
- 前記形態学的特徴が、核サイズ、核形状、核内の細孔の存在、細胞サイズ、細胞形状、及び核対細胞質の比、核の詳細、核輪郭、核小体の存在又は非存在、細胞質の質及び細胞質の量からなる群の1以上を含む、請求項10記載の方法。
- 前記CTCの検出が、周囲の有核細胞に対して、汎サイトケラチン(CK)蛍光染色の強度を比較することをさらに含む、請求項1記載の方法。
- 前記血液試料に関する白血球(WBC)数を得る初期工程をさらに含む、請求項1記載の方法。
- 前記血液試料中の赤血球を溶解する初期工程をさらに含む、請求項1記載の方法。
- 前記CTCを検出するための有核細胞の免疫蛍光染色が、汎サイトケラチン(CK)、分化抗原群(CD)45、及びジアミジノ-2-フェニルインドール(DAPI)を含む、請求項1記載の方法。
- 転移性去勢抵抗性前立腺癌(mCRPC)患者から得られた血液試料中の有核細胞の免疫蛍光染色及び形態学的特徴決定を含む直接分析を実行し、循環腫瘍細胞(CTC)データを作製する方法であって、この分析が、該細胞中のアンドロゲン受容体バリアント7(AR-V7)の存在を検出することを含む、前記方法。
- 前記AR-V7が、CTCの核内に局在化されている、請求項16記載の方法。
- 前記AR-V7の核局在化が、mCRPC患者に関するARS-指向型療法に対する抵抗性に対応している、請求項17記載の方法。
- 前記AR-V7の核局在化が、mCRPC患者に関するARS-指向型療法と比べ、タキサン療法に対する陽性反応に対応している、請求項18記載の方法。
- 前記核局在化が、隣接白血球(WBC)からのバックグラウンド染色よりも3倍以上高いシグナル強度を伴う、染色パターンを含む、請求項17記載の方法。
- 周囲の有核細胞と比べ、CTCにおける識別できる形態学的特徴を検出することをさらに含む、請求項16記載の方法。
- 前記形態学的特徴が、核サイズ、核形状、核内の細孔の存在、細胞サイズ、細胞形状、及び核対細胞質の比、核の詳細、核輪郭、核小体の存在又は非存在、細胞質の質及び細胞質の量からなる群の1以上を含む、請求項21記載の方法。
- 前記CTCの検出が、周囲の有核細胞に対する、汎サイトケラチン(CK)蛍光染色の強度を比較することをさらに含む、請求項16記載の方法。
- 前記CTCを検出するための有核細胞の免疫蛍光染色が、汎サイトケラチン(CK)、分化抗原群(CD)45、及びジアミジノ-2-フェニルインドール(DAPI)を含む、請求項16記載の方法。
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