PMID- 30046387 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20191120 IS - 1949-2553 (Electronic) IS - 1949-2553 (Linking) VI - 9 IP - 53 DP - 2018 Jul 10 TI - miR-363 confers taxane resistance in ovarian cancer by targeting the Hippo pathway member, LATS2. PG - 30053-30065 LID - 10.18632/oncotarget.25698 [doi] AB - Ovarian cancer is the most aggressive female reproductive tract tumours. Taxane (paclitaxel; TX) is widely used for ovarian cancer treatment. However, ovarian cancers often acquire chemoresistance. MicroRNAs (miR) have been reported to mediate many tumours'chemoresistance. We investigated the role of miR-363 in the chemoresistance of the ovarian cancer cell line, KF, and its TX-resistant derivative (KF-TX) cells. QRT-PCR indicated that miR-363 was upregulated in KF-TX cells, and introduction of miR-363 into sensitive ovarian cancer cells confers TX-resistance and significantly inhibited the expression of the Hippo member, LATS2, as indicated by viability, clonogenic assay and expression analysis. Furthermore, we validated the role of LATS2 in TX-response by sh-based silencing, which also confers TX-resistance to the ovarian cancer cells. On the other hand, specific inhibitor against miR-363 restored the response to TX in the resistant cells. In addition, miR-363 was found to bind to the 3'-UTR of LATS2 mRNA, confirming that miR-363 directly targets LATS2 as indicated by dual luciferase assay. RT-PCR-based evaluation of miR-363 in a panel of human ovarian tumours revealed its upregulation in most of the tumour tissues identified as resistant while it was downregulated in most of the tissues identified as sensitive ones. Moreover, higher levels of miR-363 in human ovarian cancer specimens were significantly correlated with TX chemoresistance. Taken together, our study reveals the involvement of miR-363 in chemoresistance by targeting LATS2 in ovarian cancers, raising the possibility that combination therapy with a miR-363 inhibitor and TX may increase TX efficacy and reduce the chance of TX-resistance. FAU - Mohamed, Zeinab AU - Mohamed Z AD - Zoology Department, Faculty of Science, Aswan University, Aswan, Egypt. AD - Department of Obstetrics and Gynaecology, Hokkaido University Graduate School of Medicine, Sapporo, Japan. FAU - Hassan, Mohamed Kamel AU - Hassan MK AD - Department of Obstetrics and Gynaecology, Hokkaido University Graduate School of Medicine, Sapporo, Japan. AD - Bitechnology Program, Zoology Department, Faculty of Science, Port Said University, Port Said, Egypt. AD - Centre for Genomics, HelmyInstitute for Medical Sciences, Zewail City for Science and Technology, Giza, Egypt. FAU - Okasha, Safwat AU - Okasha S AD - Zoology Department, Faculty of Science, Aswan University, Aswan, Egypt. FAU - Mitamura, Takashi AU - Mitamura T AD - Department of Obstetrics and Gynaecology, Hokkaido University Graduate School of Medicine, Sapporo, Japan. FAU - Keshk, Sarah AU - Keshk S AD - Bitechnology Program, Zoology Department, Faculty of Science, Port Said University, Port Said, Egypt. AD - Centre for Genomics, HelmyInstitute for Medical Sciences, Zewail City for Science and Technology, Giza, Egypt. FAU - Konno, Yusuke AU - Konno Y AD - Department of Obstetrics and Gynaecology, Hokkaido University Graduate School of Medicine, Sapporo, Japan. FAU - Kato, Tatsuya AU - Kato T AD - Department of Obstetrics and Gynaecology, Hokkaido University Graduate School of Medicine, Sapporo, Japan. FAU - El-Khamisy, Sherif F AU - El-Khamisy SF AD - Centre for Genomics, HelmyInstitute for Medical Sciences, Zewail City for Science and Technology, Giza, Egypt. AD - Krebs and Sheffield Institute for Nucleic Acids, University of Sheffield, Sheffield, UK. FAU - Ohba, Yusuke AU - Ohba Y AD - Department of Cell Physiology, Hokkaido University Graduate School of Medicine, Sapporo, Japan. FAU - Watari, Hidemichi AU - Watari H AD - Department of Obstetrics and Gynaecology, Hokkaido University Graduate School of Medicine, Sapporo, Japan. LA - eng PT - Journal Article DEP - 20180710 PL - United States TA - Oncotarget JT - Oncotarget JID - 101532965 PMC - PMC6059020 OTO - NOTNLM OT - LATS2 OT - chemoresistance OT - miR-363 OT - ovarian cancer OT - taxane COIS- CONFLICTS OF INTEREST The authors declare there is no conflicts of interest EDAT- 2018/07/27 06:00 MHDA- 2018/07/27 06:01 PMCR- 2018/07/10 CRDT- 2018/07/27 06:00 PHST- 2017/11/21 00:00 [received] PHST- 2018/06/04 00:00 [accepted] PHST- 2018/07/27 06:00 [entrez] PHST- 2018/07/27 06:00 [pubmed] PHST- 2018/07/27 06:01 [medline] PHST- 2018/07/10 00:00 [pmc-release] AID - 25698 [pii] AID - 10.18632/oncotarget.25698 [doi] PST - epublish SO - Oncotarget. 2018 Jul 10;9(53):30053-30065. doi: 10.18632/oncotarget.25698. eCollection 2018 Jul 10.