Abstract
The function of oncogenic lncRNA BLACAT1 has been studied in several types of cancer, while its role in cervical squamous cell carcinoma (CSCC) is unknown. We showed that BLACAT1 was upregulated in CSCC tissue comparing to adjacent non-cancer tissue of CSCC patients. BLACAT1 expression in CSCC tissues was not affected by HPV infection. Patients with higher BLACAT1 level in CSCC tissues showed a significantly lower overall 5-year survival rate. BLACAT1 expression was inversely correlated with several tumor-suppressive miRNAs, such as miR-424 and miR-143. miR-424 and miR-143 overexpression did not significantly affect BLACAT1, while BLACAT1 overexpression caused downregulated miR-424 and miR-143. Overexpression of miR-424 and miR-143 led to inhibited migration and invasion, while BLACAT1 overexpression led to promoted migration and invasion of CSCC cells. In addition, overexpression of miR-424 and miR-143 attenuated the effects of BLACAT1 overexpression. Therefore, BLACAT1 overexpression may promote CSCC by downregulating miR-424 and miR-143.
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