ArticleInternational journal of medical sciences2025
Comprehensive Pan-Cancer Analysis of RAC1 Decoding the Impact on Cancer Prognosis and B cell immune Regulation.
Article in International journal of medical sciences, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
RAC1, a member of the Rho family GTPases, has been implicated in various cancers, yet its pan-cancer landscape and role in the tumor immune microenvironment remain underexplored. This study presents a comprehensive analysis of RAC1 across 33 cancer types, revealing its high expression in a broad range of cancers and its association with poor prognosis. RAC1 expression correlates with genomic alterations, including CNVs, TMB, and MSI. RAC1 knockdown reduces cell proliferation and metastasis in breast and lung cancer cells, suggesting its oncogenic potential. Notably, RAC1 is negatively correlated with B cell infiltration, indicating its role in regulating the immune microenvironment. Functional enrichment analysis showed that high RAC1 expression is linked to lower enrichment in B cell activation and immune response pathways. Single-cell transcriptome analysis identified RAC1 expression primarily in epithelial cells, associated with tumor progression, and spatial transcriptome analysis showed a mutually exclusive co-localization between B cell infiltration regions and RAC1-expressing epithelial cells. Based on RAC1 expression and B cell interaction, a prognostic signature was established to predict prognosis at the pan-cancer level.
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