PMID- 34290981 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210723 IS - 2234-943X (Print) IS - 2234-943X (Electronic) IS - 2234-943X (Linking) VI - 11 DP - 2021 TI - HOTTIP Enhances Gemcitabine and Cisplatin Resistance Through Sponging miR-637 in Cholangiocarcinoma. PG - 664916 LID - 10.3389/fonc.2021.664916 [doi] LID - 664916 AB - Chemo-resistance prominently hampers the effects of systemic chemotherapy to cholangiocarcinoma (CCA). Long non-coding RNAs (lncRNAs) have been shown to have great importance not only in tumorigenesis but also in therapeutic prognosis. The aim of this study is to investigate the role of lncRNA HOTTIP in the chemo-resistance to cisplatin and gemcitabine (CG) in CCA. The upregulated expression of HOTTIP was observed in CCA patients and the upregulation was associated with therapeutic responsiveness and prognosis. HOTTIP silencing powerfully increased the chemotherapy sensitivity through weakening proliferation and colony formation and increasing apoptosis. Subsequently, miR-637 was identified as the functional target of HOTTIP, since mechanically it could be targeted by HOTTIP and functionally its overexpression dismissed the changes by HOTTIP silencing in vitro and in vivo. Moreover, LIM and SH3 domain protein 1 (LASP1) could be targeted and regulated by miR-637. In all, HOTTIP modulates the sensitivity to CG in CCA through the HOTTIP/miR-637/LASP1 regulatory axis, providing a new opportunities for CCA treatment. CI - Copyright (c) 2021 Gao, Chen and Yang. FAU - Gao, Kun AU - Gao K AD - Department of Interventional Radiology, Beijing Chao-yang Hospital Affiliated with Capital Medical University, Beijing, China. FAU - Chen, Shuhua AU - Chen S AD - Department of Clinical Laboratory, Yunfu People's Hospital, Yunfu, China. FAU - Yang, Xiangyu AU - Yang X AD - Department of Interventional Radiology, Beijing Chao-yang Hospital Affiliated with Capital Medical University, Beijing, China. LA - eng PT - Journal Article DEP - 20210705 PL - Switzerland TA - Front Oncol JT - Frontiers in oncology JID - 101568867 PMC - PMC8287300 OTO - NOTNLM OT - HOTTIP OT - LASP1 OT - cholangiocarcinoma OT - long non-coding RNAs OT - miR-637 COIS- The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2021/07/23 06:00 MHDA- 2021/07/23 06:01 PMCR- 2021/01/01 CRDT- 2021/07/22 06:35 PHST- 2021/02/10 00:00 [received] PHST- 2021/06/16 00:00 [accepted] PHST- 2021/07/22 06:35 [entrez] PHST- 2021/07/23 06:00 [pubmed] PHST- 2021/07/23 06:01 [medline] PHST- 2021/01/01 00:00 [pmc-release] AID - 10.3389/fonc.2021.664916 [doi] PST - epublish SO - Front Oncol. 2021 Jul 5;11:664916. doi: 10.3389/fonc.2021.664916. eCollection 2021.