Kai Wang, Xihao Shen, Jiyue Wu, Qing Bi, Zihao Gao, Zejia Sun, Wei Wang
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引用次数: 0
Abstract
Background: Clear cell renal cell carcinoma (ccRCC) is the predominant subtype of renal cancer, with a poor prognosis driven by therapy resistance and a propensity for recurrence. Tumor microenvironment (TME)-associated fibrosis accelerates disease progression by fostering immune evasion. Neuropilin-1 (NRP1), a key mediator in fibrotic signaling and cancer biology, has been implicated in these processes. However, the genetic correlation between fibrogenesis and ccRCC remains largely unexplored, necessitating a focused analysis of fibrogenesis-related genes (FRGs) to identify novel prognostic markers and therapeutic strategies.
Methods: This study utilized an integrative bioinformatics framework to identify prognosis-associated fibrogenesis-related genes (pFRGs) and applied non-negative matrix factorization (NMF) to stratify ccRCC patients based on fibrotic signatures. A machine learning-derived prognostic model was developed to categorize patients into high-risk and low-risk groups, with tumor microenvironment (TME) features analyzed across these subgroups. The pro-tumorigenic role of NRP1 via the TGF-β/SMAD signaling pathway was validated in vitro and in vivo.
Results: Twelve pFRGs were identified, with elevated expression correlating with reduced survival. NMF revealed two ccRCC subtypes with different fibrotic and immune profiles. The high-fibrosis subtype showed worse survival and a pro-tumorigenic TME. The risk model demonstrated robust predictive performance (AUCs: 0.738, 0.731, 0.711 for 1-, 2-, and 3-year survival). High-risk patients, marked by immune dysfunction, exhibited worse survival but greater immunotherapy sensitivity. Among the pFRGs, NRP1 was upregulated in ccRCC, and paradoxically associated with favorable prognosis in TCGA, primarily due to stromal enrichment. In vitro and in vivo experiments confirmed that NRP1 promotes ccRCC proliferation, migration, and invasion by enhancing TGF-β/SMAD-driven epithelial-mesenchymal transition (EMT).
Conclusion: Fibrosis is a critical driver of ccRCC progression, linking fibrogenesis-related genes to poor prognosis, immune suppression, and tumor aggressiveness. NRP1 was identified as a central regulator of fibrosis-induced tumor progression through the TGF-β/SMAD signaling pathway. Combining NRP1 inhibition with anti-fibrotic therapies presents a potential strategy for enhancing therapeutic outcomes in ccRCC.
期刊介绍：
Cancer Cell International publishes articles on all aspects of cancer cell biology, originating largely from, but not limited to, work using cell culture techniques.
The journal focuses on novel cancer studies reporting data from biological experiments performed on cells grown in vitro, in two- or three-dimensional systems, and/or in vivo (animal experiments). These types of experiments have provided crucial data in many fields, from cell proliferation and transformation, to epithelial-mesenchymal interaction, to apoptosis, and host immune response to tumors.
Cancer Cell International also considers articles that focus on novel technologies or novel pathways in molecular analysis and on epidemiological studies that may affect patient care, as well as articles reporting translational cancer research studies where in vitro discoveries are bridged to the clinic. As such, the journal is interested in laboratory and animal studies reporting on novel biomarkers of tumor progression and response to therapy and on their applicability to human cancers.
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