Abstract
Gastric cancer, with its high global incidence and mortality rates, poses a significant challenge due to the rapid decline in patient survival upon metastasis. Understanding and combating metastasis are crucial in improving outcomes. The metastasis suppressor gene CD82 has demonstrated efficacy in inhibiting metastasis across various carcinomas but is frequently down-regulated. However, its role and regulatory mechanisms in gastric cancer remain elusive. Utilizing public data, we assessed patient survival in relation to CD82 expression. CD82 expression in gastric cancer cell lines was evaluated via western blotting, and its impact on cell mobility was assessed through wound healing and Transwell assays. The demethylation of CD82 was induced using 5-aza-deoxycytidine, while methylation levels were detected via methylation-specific PCR. Low CD82 expression correlated with poor prognosis in patients, and down-regulation and over-expression of CD82 significantly affected cell mobility. Treatment with 5-aza-deoxycytidine restored CD82 expression in low-expressing cell lines, highlighting its methylation-dependent regulation. CD82 serves as a pivotal regulator of cell mobility in gastric cancer by suppressing metastasis. Its expression is attenuated in gastric cancer cells through promoter hypermethylation.
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