After MBNL1-AS1 overexpression, the biological function of MBNL1-AS1 in PCa and MBNL1-AS1 mechanistically served as a competitive endogenous RNA (ceRNA) to regulate miR-181a-5p and phosphatase and tensin homolog (PTEN) were investigated. The gene discussed is MBNL1; the disease is posterior cortical atrophy.