P4HA1 and metabolic dysfunction-associated steatotic liver disease: Subsequently, through WGCNA, logistic regression, SVM, RF, and Lasso regression, we identified six Hub MRGs (NR4A1, PPP2R2A, P4HA1, TUBB6, DUSP1, NAMPT), all significantly downregulated in NAFLD samples compared to the control group.