PMID- 35413492 OWN - NLM STAT- MEDLINE DCOM- 20220603 LR - 20220613 IS - 1532-3072 (Electronic) IS - 0040-8166 (Linking) VI - 76 DP - 2022 Jun TI - Analysis of the function and mechanism of DIRAS1 in osteosarcoma. PG - 101794 LID - S0040-8166(22)00066-0 [pii] LID - 10.1016/j.tice.2022.101794 [doi] AB - BACKGROUND: Osteosarcoma is a prevalent malignant bone tumor with a tendency to metastasize to the lungs. In this study, we intend to detect the function and mechanism of DIRAS family GTPase 1 (DIRAS1) in osteosarcoma cells. METHODS: Expression level of DIRAS1 in osteosarcoma cells was analyzed by western blot. Cell location of DIRAS1 in osteosarcoma cells was detected by immunofluorescence. Small interfering RNAs (siRNA)-DIRAS1 and pcDNA3.1-DIRAS1 were employed to regulate DIRAS1 expression. The malignant behaviors of osteosarcoma cells were examined by cell counting kit-8, colony formation, transwell, and wound healing assays. The expression of related proteins was measured by western blot. ELISA and dot blot assays were used to detect the methylation level of m6A. Rescue assays were performed to detect the function of METTL3/METTL14 and DIRASI on osteosarcoma cells. RESULTS: DIRAS1 was located in the nucleus of osteosarcoma cells. Silencing of DIRAS1 in MG63 cells strengthened the proliferation, invasion and migration abilities, as well as blocked the apoptosis ability. Also, p-ERK expression was regulated by DIRAS1 expression, while p-AKT was not affected. Furthermore, DIRAS1 expression was suppressed by METTL3 or/and METTL14 treatment. Moreover, the inhibitory effect of DIRAS1 overexpression on HOS cells malignant behaviors can be reversed by METTL3 and METTL14 joint treatment. The reduced expression of p-ERK induced by DIRAS1 overexpression can be inversed by METTL3 and METTL14 co-treatment. CONCLUSIONS: Taken together, our findings illustrated that DIRAS1 regulated by METTL3 and METTL14 can obviously modulate the malignant behaviors of osteosarcoma cells by inactivating ERK pathway. CI - Copyright (c) 2022. Published by Elsevier Ltd. FAU - Liu, Huan AU - Liu H AD - Department of Osteology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China. FAU - Shu, Weibin AU - Shu W AD - Tumor Research and Therapy Center, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong 250000, China. FAU - Liu, Tianyue AU - Liu T AD - Department of Osteology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China. FAU - Li, Qingsong AU - Li Q AD - Second Department of Anesthesiology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China. FAU - Gong, Mingzhi AU - Gong M AD - Department of Osteology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China. Electronic address: Gongmzh242@sina.com. LA - eng PT - Journal Article DEP - 20220404 PL - Scotland TA - Tissue Cell JT - Tissue & cell JID - 0214745 RN - 0 (RNA, Small Interfering) RN - 0 (Tumor Suppressor Proteins) RN - EC 2.1.1.- (Methyltransferases) RN - EC 2.1.1.62 (METTL3 protein, human) RN - EC 3.6.1.- (DIRAS1 protein, human) RN - EC 3.6.1.- (GTP Phosphohydrolases) SB - IM MH - *Bone Neoplasms/genetics/metabolism/pathology MH - Cell Line, Tumor MH - Cell Movement/genetics MH - Cell Proliferation/genetics MH - *GTP Phosphohydrolases/metabolism MH - Humans MH - Methyltransferases/genetics/metabolism MH - *Osteosarcoma/genetics/metabolism/pathology MH - RNA, Small Interfering/genetics/metabolism MH - *Tumor Suppressor Proteins/genetics/metabolism OTO - NOTNLM OT - DIRAS1 OT - METTL14 OT - METTL3 OT - Migration OT - Osteosarcoma OT - Proliferation EDAT- 2022/04/13 06:00 MHDA- 2022/06/07 06:00 CRDT- 2022/04/12 20:11 PHST- 2021/10/10 00:00 [received] PHST- 2022/03/29 00:00 [revised] PHST- 2022/04/01 00:00 [accepted] PHST- 2022/04/13 06:00 [pubmed] PHST- 2022/06/07 06:00 [medline] PHST- 2022/04/12 20:11 [entrez] AID - S0040-8166(22)00066-0 [pii] AID - 10.1016/j.tice.2022.101794 [doi] PST - ppublish SO - Tissue Cell. 2022 Jun;76:101794. doi: 10.1016/j.tice.2022.101794. Epub 2022 Apr 4.