LncRNA PTCSC3 inhibits triple‐negative breast cancer cell proliferation by downregulating lncRNA H19
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Abstract
Long noncoding RNA (lncRNA) PTCSC3 (hereafter PTCSC3 is used to represent lncRNA PTCSC3) inhibits glioma and thyroid cancer, indicating its potential tumor suppression function in other types of cancers. We explored the potential involvement of PTCSC3 in triple-negative breast cancer (TNBC). In the current study, we found that PTCSC3 was downregulated in tumor tissues of patients with TNBC. PTCSC3 expression was positively correlated with plasma levels of PTCSC3. LncRNA H19 was upregulated and was inversely correlated with PTCSC3 in tumor tissues. PTCSC3 overexpression led to downregulated H19 in TNBC cells, while H19 overexpression did not affect PTCSC3 expression. PTCSC3 inhibited and H19 promoted proliferation of TNBC cells. H19 overexpression attenuated the effects of PTCSC3 overexpression. Cancer cell migration and invasion were not significantly affected by PTCSC3 overexpression. Therefore, lncRNA PTCSC3 inhibits TNBC cell proliferation by downregulating lncRNA H19.
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