cRNA circ_0003221 promotes cervical cancer progression
14 have been identified to promote cervical cancer progression, suggesting the important role of circRNAs in cervical cancer tumorigenesis. As for circ_0003221 (also known as circPTK2, chr8:141856358–141900868), it has been demonstrated to be overexpressed in cervical cancer cells. 15 Nevertheless, the role of circ_0003221 in cervical cancer remains largely unclear. Large evidence has shown that circRNAs can serve as competing endogenous RNAs (ceRNAs), also known as microRNA (miRNA) sponges, via competitively binding to miRNA response elements, thereby regulating the expression of downstrea...