LINC00355 and neoplasm: In addition, we detected Ki-67 expression in tumor tissues, and the results showed that Ki-67 expression in tumors derived from control mice was stronger than that in tumors derived from the LINC00355-knockdown group, while Ki-67 expression in tumors derived from the LINC00355-overexpression group was stronger than that in the control tissue (Fig. 4d).