The tumor suppressive effect of long non-coding RNA FRMD6-AS2 in uteri corpus endometrial carcinoma

Uterine corpus endometrial cancer (UCEC) is one of the most common gynecological malignancies with increasing incidence and high morbidity and mortality. The currently acknowledged molecular mechanism of UCEC is still not adequate. Here, we reported that the expression of a novel long non-coding RNA (lncRNA) FRMD6-AS2 was reduced in UCEC compared to noncancerous endometrium tissues using the data from The Cancer Genome Atlas (TCGA) Project database. The gene ontology (GO) analysis on differential expressed targeted genes of FRMD6-AS2 in UCEC suggested that FRMD6-AS2 might impact with the function of actin-mediated cell movement and contraction. By over-expressing FRMD6-AS2 in UCEC cell lines, we observed that FRMD6-AS2 played a suppressive role in tumor growth, migration and invasion via activation of Hippo signaling pathway including FRMD6. Moreover, we also demonstrated that FRMD6-AS2 could interact with the 30 kb upstream beyond FRMD6 and facilitate the chromatin looping towards the promoter region of FRMD6 to enhance the expression of FRMD6. We concluded that lncRNA FRMD6-AS2 repressed UCEC, at least in part, by increasing FRMD6.