医学
肾细胞癌
细胞
生物标志物
肾透明细胞癌
肾切除术
肿瘤科
队列
人口
肾癌
辅助治疗
清除单元格
内科学
流式细胞术
癌症
肾
免疫学
遗传学
环境卫生
生物
生物化学
作者
Judikaël Saout,Gwendoline Lecuyer,Simon Léonard,Bertrand Evrard,Solène‐Florence Kammerer‐Jacquet,Laurence Noël,Zine‐Eddine Khene,Romain Mathiéu,Angélique Brunot,Antoine Rolland,Karim Bensalah,Nathalie Rioux‐Leclercq,Aurélie Lardenois,Frédéric Chalmel
标识
DOI:10.1016/j.eururo.2023.02.008
摘要
Intratumor heterogeneity (ITH) is a key feature in clear cell renal cell carcinomas (ccRCCs) that impacts outcomes such as aggressiveness, response to treatments, or recurrence. In particular, it may explain tumor relapse after surgery in clinically low-risk patients who did not benefit from adjuvant therapy. Recently, single-cell RNA sequencing (scRNA-seq) has emerged as a powerful tool to unravel expression ITH (eITH) and might enable better assessment of clinical outcomes in ccRCC. To explore eITH in ccRCC with a focus on malignant cells (MCs) and assess its relevance to improve prognosis for low-risk patients. We performed scRNA-seq on tumor samples from five untreated ccRCC patients ranging from pT1a to pT3b. Data were complemented with a published dataset composed of pairs of matched normal and ccRCC samples. Radical or partial nephrectomy on untreated ccRCC patients. Viability and cell type proportions were determined by flow cytometry. Following scRNA-seq, a functional analysis was performed and tumor progression trajectories were inferred. A deconvolution approach was applied on an external cohort, and Kaplan-Meier survival curves were estimated with respect to the prevalence of malignant clusters. We analyzed 54 812 cells and identified 35 cell subpopulations. The eITH analysis revealed that each tumor contained various degrees of clonal diversity. The transcriptomic signatures of MCs in one particularly heterogeneous sample were used to design a deconvolution-based strategy that allowed the risk stratification of 310 low-risk ccRCC patients. We described eITH in ccRCCs, and used this information to establish significant cell population–based prognostic signatures and better discriminate ccRCC patients. This approach has the potential to improve the stratification of clinically low-risk patients and their therapeutic management. We sequenced the RNA content of individual cell subpopulations composed of clear cell renal cell carcinomas and identified specific malignant cells the genetic information of which can be used to predict tumor progression.
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