This study investigates the molecular landscape of clear cell renal cell carcinomas (ccRCCs) by integrating single-cell transcriptomics to uncover the dynamics of myofibroblasts and potential therapeutic targets. The research team, led by Chen Yang from the German Cancer Research Center and Zhou Sun from Jilin University, conducted a comprehensive analysis of ccRCCs using single-cell RNA sequencing and bulk RNA-seq data from the TCGA database. They identified key subpopulations of myofibroblasts and epithelial progenitor cells (EPCs), focusing on the C3 HMGA1+ myofibroblast subpopulation, which exhibited high interaction with tumor cells through the MPZ signaling pathway. The study also identified prognostic genes associated with these subpopulations, including TUBB3, which may be involved in resistance to tumor recurrence. Experimental validation showed that knocking down the MPZL1 gene in the MPZ pathway inhibited tumor activity, proliferation, invasion, and migration. The findings suggest that targeting the MPZL1 and oxidative phosphorylation pathways could be potential therapeutic strategies for ccRCCs. The study highlights the importance of understanding the complex interactions between myofibroblasts and ccRCCs at the single-cell level to develop new treatment and prognosis strategies. The research provides insights into the molecular mechanisms underlying ccRCC progression and offers potential targets for future therapeutic interventions.This study investigates the molecular landscape of clear cell renal cell carcinomas (ccRCCs) by integrating single-cell transcriptomics to uncover the dynamics of myofibroblasts and potential therapeutic targets. The research team, led by Chen Yang from the German Cancer Research Center and Zhou Sun from Jilin University, conducted a comprehensive analysis of ccRCCs using single-cell RNA sequencing and bulk RNA-seq data from the TCGA database. They identified key subpopulations of myofibroblasts and epithelial progenitor cells (EPCs), focusing on the C3 HMGA1+ myofibroblast subpopulation, which exhibited high interaction with tumor cells through the MPZ signaling pathway. The study also identified prognostic genes associated with these subpopulations, including TUBB3, which may be involved in resistance to tumor recurrence. Experimental validation showed that knocking down the MPZL1 gene in the MPZ pathway inhibited tumor activity, proliferation, invasion, and migration. The findings suggest that targeting the MPZL1 and oxidative phosphorylation pathways could be potential therapeutic strategies for ccRCCs. The study highlights the importance of understanding the complex interactions between myofibroblasts and ccRCCs at the single-cell level to develop new treatment and prognosis strategies. The research provides insights into the molecular mechanisms underlying ccRCC progression and offers potential targets for future therapeutic interventions.