研究动态
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破译失巢凋亡抵抗并鉴定透明细胞肾细胞癌上皮细胞中的预后生物标志物。

Deciphering anoikis resistance and identifying prognostic biomarkers in clear cell renal cell carcinoma epithelial cells.

发表日期:2024 May 27
作者: Junyi Li, Qingfei Cao, Ming Tong
来源: Cell Death & Disease

摘要:

尽管多模式疗法取得了进展,但这项研究解决了透明细胞肾细胞癌 (ccRCC) 持续存在的预后和管理挑战。我们重点关注失巢凋亡(肿瘤进展和转移中程序性细胞死亡的一种关键形式),研究了其在癌症进化中的抵抗力。利用七名 ccRCC 患者的单细胞 RNA 测序,我们评估了失巢凋亡相关基因 (ARG) 的影响,并鉴定了失巢凋亡相关上皮亚簇 (ARES) 中的差异表达基因 (DEG)。此外,还分析了 GEO 数据库中的 6 个 ccRCC RNA 微阵列数据集的稳健 DEG。通过 LASSO 和多元 Cox 回归开发了一种新型风险预测模型,并使用 BEST、ULCAN 和 RT-PCR 进行了验证。该研究包括功能丰富、肿瘤微环境 (TME) 中的免疫浸润分析和药物敏感性评估,从而得出整合临床参数的预测列线图。结果强调了 ARES 中的动态 ARG 表达模式和增强的细胞间相互作用,MYC  上皮亚簇中的 KEGG 通路显着富集,表明失巢凋亡抵抗力增强。此外,所有 ARES 均在空间背景下进行了识别,并探讨了它们的位置关系。确定了三个关键的预后基因——TIMP1、PECAM1和CDKN1A,高危人群表现出更大的免疫浸润和失巢凋亡抵抗力,与较差的预后相关。这项研究提供了一种新颖的 ccRCC 风险特征,为患者管理、预后和个性化治疗提供了创新方法。© 2024。作者。
This study tackles the persistent prognostic and management challenges of clear cell renal cell carcinoma (ccRCC), despite advancements in multimodal therapies. Focusing on anoikis, a critical form of programmed cell death in tumor progression and metastasis, we investigated its resistance in cancer evolution. Using single-cell RNA sequencing from seven ccRCC patients, we assessed the impact of anoikis-related genes (ARGs) and identified differentially expressed genes (DEGs) in Anoikis-related epithelial subclusters (ARESs). Additionally, six ccRCC RNA microarray datasets from the GEO database were analyzed for robust DEGs. A novel risk prognostic model was developed through LASSO and multivariate Cox regression, validated using BEST, ULCAN, and RT-PCR. The study included functional enrichment, immune infiltration analysis in the tumor microenvironment (TME), and drug sensitivity assessments, leading to a predictive nomogram integrating clinical parameters. Results highlighted dynamic ARG expression patterns and enhanced intercellular interactions in ARESs, with significant KEGG pathway enrichment in MYC + Epithelial subclusters indicating enhanced anoikis resistance. Additionally, all ARESs were identified in the spatial context, and their locational relationships were explored. Three key prognostic genes-TIMP1, PECAM1, and CDKN1A-were identified, with the high-risk group showing greater immune infiltration and anoikis resistance, linked to poorer prognosis. This study offers a novel ccRCC risk signature, providing innovative approaches for patient management, prognosis, and personalized treatment.© 2024. The Author(s).