Urothelial carcinoma associated 1 (UCA1), a long non- coding RNA (lncRNA) that firstly found in bladder cancer, is ectopic expressed in various tumors, including bladder cancer, breast cancer and melanoma. UCA1 takes part in several signaling and it is also involved in post- transcriptional regulation by pathways, acting as competitive endogenous RNA(ceRNA). Recent studies have shown that the ectopic expression of UCA1 is closely related to tumorchemotherapy resistance in different tumors. UCA1, a promising target for drug resistance, cou...