In prostate cancer (PCa), we previously demonstrated that the oncogenic PTEN-PI3K-AKT-mTOR-ERα signaling pathway upregulates Glo2, leading to intracellular D-lactate accumulation and enhanced cell migration, invasiveness, and expression of epithelial-to-mesenchymal transition (EMT)-associated markers. The gene discussed is PTEN; the disease is prostate carcinoma.