Aging-associated ZNF573 methylation regulates RNF19B-PIK3CA ubiquitination to promote prostate cancer.

Aging significantly influences the pathogenesis of prostate cancer (PCa). Emerging evidence suggests that aging-related methylation changes play a critical role in PCa. However, the impact of aging-related DNA methylation in PCa remains largely unexplored. To identify hypermethylated sites associated with aging in PCa, we performed an epigenome-wide analysis using Illumina Human Methylation BeadChip arrays. The candidate methylation markers were further refined through least absolute shrinkage and selection operator (LASSO) regression and Random Forest model. Besides, we investigate the functional role of ZNF573 in PCa. Our analysis identified four aging-related CpG sites in the promoter region of ZNF573 that exhibited significant hypermethylation in PCa. These four DNA methylation markers effectively distinguished PCa from benign prostatic hyperplasia (BPH) with high AUC (0.847), which was superior to PSA. Furthermore, the expression of ZNF573 was notably down-regulated in PCa, and its overexpression significantly inhibited PCa cells proliferation and invasion both in vivo and in vitro. ZNF573 acting as a transcription factor promoted the expression of the E3 ubiquitin ligase RNF19B, which regulated the ubiquitination of PIK3CA. These findings suggest that aging-related ZNF573 methylation could serve as a potential diagnostic biomarker for PCa, influencing the development and progression of PCa through the regulation of PIK3CA ubiquitination via RNF19B.