PMID- 33952456 OWN - NLM STAT- MEDLINE DCOM- 20210517 LR - 20210517 IS - 1791-7530 (Electronic) IS - 0250-7005 (Linking) VI - 41 IP - 5 DP - 2021 May TI - Retinoids Decrease Soluble MICA Concentration by Inhibiting the Enzymatic Activity of ADAM9 and ADAM10. PG - 2307-2320 LID - 10.21873/anticanres.15006 [doi] AB - BACKGROUND/AIM: The association between MHC class I polypeptide-related sequence A (MICA) and hepatocellular carcinoma (HCC) development was identified in our previous genome-wide association study. Decreasing soluble MICA (sMICA) through MICA sheddases suppression facilitates natural killer (NK) cell-mediated cytotoxicity. The expression of ADAM9 in HCC has been correlated with poor prognosis, and our recent study showed that its suppression contributes to cancer elimination by decreasing sMICA. MATERIALS AND METHODS: Human HCC cell line PLC/PRF/5 and HepG2 cells were used. sMICA levels were measured by ELISA. Expression of retinoid X receptors (RXRs) and retinoic acid receptors (RARs) was knocked down by siRNA. RESULTS: In our screening of FDA-approved drugs in vitro, retinoids were found to be efficient ADAM9 and ADAM10 inhibitors. Treatment with retinoids reduced sMICA levels in human HCC cells. Interestingly, the effects were abrogated by depletion of the retinoid receptor RXRalpha. CONCLUSION: Retinoids can be potential novel agents for HCC treatment. CI - Copyright (c) 2021 International Institute of Anticancer Research (Dr. George J. Delinasios), All rights reserved. FAU - Otoyama, Yumi AU - Otoyama Y AD - Division of Gastroenterology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan. FAU - Arai, Jun AU - Arai J AD - Division of Gastroenterology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan; araiguma10@med.showa-u.ac.jp. FAU - Goto, Kaku AU - Goto K AD - Institut de Recherche sur les Maladies Virales et Hepatiques, INSERM, Strasbourg, France. FAU - Nozawa, Hisako AU - Nozawa H AD - Division of Gastroenterology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan. FAU - Nakagawa, Ryo AU - Nakagawa R AD - Department of Gastroenterology, Graduate School of Medicine, Chiba University, Chiba, Japan. FAU - Muroyama, Ryosuke AU - Muroyama R AD - Department of Gastroenterology, Graduate School of Medicine, Chiba University, Chiba, Japan. FAU - Sugiura, Ikuya AU - Sugiura I AD - Division of Gastroenterology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan. FAU - Nakajima, Yoko AU - Nakajima Y AD - Division of Gastroenterology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan. FAU - Kajiwara, Atsushi AU - Kajiwara A AD - Division of Gastroenterology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan. FAU - Tojo, Masayuki AU - Tojo M AD - Division of Gastroenterology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan. FAU - Ichikawa, Yuki AU - Ichikawa Y AD - Division of Gastroenterology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan. FAU - Uozumi, Shojiro AU - Uozumi S AD - Division of Gastroenterology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan. FAU - Shimozuma, Yuu AU - Shimozuma Y AD - Division of Gastroenterology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan. FAU - Uchikoshi, Manabu AU - Uchikoshi M AD - Division of Gastroenterology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan. FAU - Sakaki, Masashi AU - Sakaki M AD - Division of Gastroenterology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan. FAU - Kato, Naoya AU - Kato N AD - Department of Gastroenterology, Graduate School of Medicine, Chiba University, Chiba, Japan. FAU - Yoshida, Hitoshi AU - Yoshida H AD - Division of Gastroenterology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan. LA - eng PT - Journal Article PL - Greece TA - Anticancer Res JT - Anticancer research JID - 8102988 RN - 0 (Histocompatibility Antigens Class I) RN - 0 (MHC class I-related chain A) RN - 0 (Membrane Proteins) RN - 0 (Phenylurea Compounds) RN - 0 (Pyridines) RN - 0 (Retinoid X Receptors) RN - 0 (Retinoids) RN - 24T2A1DOYB (regorafenib) RN - EC 3.4.24.- (ADAM Proteins) RN - EC 3.4.24.- (ADAM9 protein, human) RN - EC 3.4.24.81 (ADAM10 Protein) SB - IM MH - ADAM Proteins/antagonists & inhibitors/genetics/*metabolism MH - ADAM10 Protein/antagonists & inhibitors/genetics/*metabolism MH - Biocatalysis/drug effects MH - Cell Line, Tumor MH - Cell Survival/drug effects MH - Drug Synergism MH - Hep G2 Cells MH - Histocompatibility Antigens Class I/genetics/*metabolism MH - Humans MH - Membrane Proteins/antagonists & inhibitors/genetics/*metabolism MH - Molecular Structure MH - Phenylurea Compounds/pharmacology MH - Pyridines/pharmacology MH - RNA Interference MH - Retinoid X Receptors/genetics/metabolism MH - Retinoids/chemistry/*pharmacology MH - Solubility OTO - NOTNLM OT - ADAM10 OT - ADAM9 OT - HCC treatment OT - MICA OT - retinoids EDAT- 2021/05/07 06:00 MHDA- 2021/05/18 06:00 CRDT- 2021/05/06 05:53 PHST- 2021/03/25 00:00 [received] PHST- 2021/04/03 00:00 [revised] PHST- 2021/04/05 00:00 [accepted] PHST- 2021/05/06 05:53 [entrez] PHST- 2021/05/07 06:00 [pubmed] PHST- 2021/05/18 06:00 [medline] AID - 41/5/2307 [pii] AID - 10.21873/anticanres.15006 [doi] PST - ppublish SO - Anticancer Res. 2021 May;41(5):2307-2320. doi: 10.21873/anticanres.15006.