Tripartite Motif Containing 26 is a Positive Predictor for Endometrial Carcinoma Patients and Regulates Cell Survival in Endometrial Carcinoma.

Abstract

Functioning as an E3 ubiquitin ligase, tripartite motif containing 26 (TRIM26) can regulate the tumor behavior and the relevant inflammatory immune response. Endometrial carcinoma is a major gynecological malignant tumor in the world, while no relevant research has been performed. KMplot, a web-based survival analysis tool, demonstrated that TRIM26 expression was positively correlated with the overall survival in gynecological tumors, such as ovarian, cervical, and endometrial cancer. The relatively low expression of TRIM26 was also found in endometrial cancer tissues and endometrial cancer cell lines. In the online Gene Expression Profiling Interactive Analysis (GEPIA) platform, TRIM26 was positively correlated with the pre-apoptosis genes of p53, BIM, BID, BAX, and BAK, and negatively correlated with the anti-apoptosis gene of BCLW. To further explore the function of TRIM26 in endometrial carcinoma, Ishikawa and KLE cells were infected with PLVX-TRIM26-derived lentivirus. TRIM26 overexpression suppressed the growth of endometrial cells, with downregulated p-AKT and upregulated BIM and BID expression. PLVX-TRIM26 overexpressed Ishikawa cells were injected subcutaneously into the side flanks of male BALB/C nude mice to construct a TRIM26-overexpression xenograft model. TRIM26 overexpression suppressed the growth of endometrial cancer as indicated by downregulated tumor volume and tumor weight with downregulated p-AKT expression. TRIM26 could regulate AKT pathway and apoptosis process to inhibit the growth of endometrial carcinoma, which can be utilized as a survival predictor.