PMID- 33505165 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220420 IS - 1178-7007 (Print) IS - 1178-7007 (Electronic) IS - 1178-7007 (Linking) VI - 14 DP - 2021 TI - Downregulation of lncRNA EPB41L4A-AS1 Mediates Activation of MYD88-Dependent NF-kappaB Pathway in Diabetes-Related Inflammation. PG - 265-277 LID - 10.2147/DMSO.S280765 [doi] AB - PURPOSE: Long non-coding RNAs (lncRNAs) have been shown to be involved in many human diseases. In this study, we aimed to reveal the role and molecular mechanism of lncRNA EPB41L4A-AS1 in type 2 diabetic mellitus (T2DM)-related inflammation. METHODS: To explore the relationships between the expression of EPB41L4A-AS1 and inflammatory factors in the blood of T2DM patients, we analyzed peripheral blood mononuclear cell (PBMC) expression microarrays of T2DM patients and expression microarrays of PBMC treated with lipopolysaccharide (LPS) from the GEO database. The relationship between EPB41L4A-AS1 and phospho-p65 was explored by Western blotting (WB) and immunofluorescence. The interactions between EPB41L4A-AS1 and myeloid differentiation factor 88 (MYD88) were also verified through quantitative real-time PCR, WB, and chromatin immunoprecipitation. Glycolysis and mitochondrial stress were detected by Seahorse. RESULTS: EPB41L4A-AS1 showed very low expression, which was significantly negatively correlated with levels of inflammatory factors in PBMCs of T2DM patients and PBMCs treated with LPS. These results were verified by cell experiments on PBMC and THP-1 cells. Knockdown of EPB41L4A-AS1 led to the phosphorylation and nuclear translocation of p65 and thus activated the NF-kappaB signaling pathway; it also reduced the enrichment of H3K9me3 in the MYD88 promoter and increased expression of MYD88. Overall, EPB41L4A-AS1 knockdown promoted the level of glycolysis and ultimately enhanced the inflammatory response. CONCLUSION: EPB41L4A-AS1 knockdown activated the NF-kappaB signaling pathway through a MYD88-dependent regulatory mechanism, promoted glycolysis, and ultimately enhanced the inflammatory response. These results demonstrate that EPB41L4A-AS1 is closely associated with inflammation in T2DM, and that low expression of EPB41L4A-AS1 may be used as an indicator of chronic inflammation and possible diabetic vascular complications in T2DM patients. CI - (c) 2021 Wang et al. FAU - Wang, Ziqing AU - Wang Z AD - School of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China. AD - State Key Laboratory of Chemical Oncogenomics, Tsinghua Shenzhen International Graduate School, Shenzhen 518055, People's Republic of China. FAU - Liao, Weijie AU - Liao W AD - State Key Laboratory of Chemical Oncogenomics, Tsinghua Shenzhen International Graduate School, Shenzhen 518055, People's Republic of China. AD - Key Laboratory in Healthy Science and Technology, Division of Life Science, Tsinghua Shenzhen International Graduate School, Shenzhen 518055, People's Republic of China. FAU - Liu, Fuhai AU - Liu F AD - State Key Laboratory of Chemical Oncogenomics, Tsinghua Shenzhen International Graduate School, Shenzhen 518055, People's Republic of China. AD - Department of Pathology, Xuzhou Medical University, Xuzhou 221104, People's Republic of China. FAU - Yang, Tingpeng AU - Yang T AD - State Key Laboratory of Chemical Oncogenomics, Tsinghua Shenzhen International Graduate School, Shenzhen 518055, People's Republic of China. FAU - Xie, Weidong AU - Xie W AD - State Key Laboratory of Chemical Oncogenomics, Tsinghua Shenzhen International Graduate School, Shenzhen 518055, People's Republic of China. AD - Key Laboratory in Healthy Science and Technology, Division of Life Science, Tsinghua Shenzhen International Graduate School, Shenzhen 518055, People's Republic of China. FAU - Liao, Meijian AU - Liao M AD - Key Laboratory in Healthy Science and Technology, Division of Life Science, Tsinghua Shenzhen International Graduate School, Shenzhen 518055, People's Republic of China. AD - Department of Pathology, Xuzhou Medical University, Xuzhou 221104, People's Republic of China. FAU - Gu, Dayong AU - Gu D AD - Department of Laboratory Medicine, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen 518035, People's Republic of China. FAU - Zhang, Yaou AU - Zhang Y AD - State Key Laboratory of Chemical Oncogenomics, Tsinghua Shenzhen International Graduate School, Shenzhen 518055, People's Republic of China. AD - Key Laboratory in Healthy Science and Technology, Division of Life Science, Tsinghua Shenzhen International Graduate School, Shenzhen 518055, People's Republic of China. LA - eng PT - Journal Article DEP - 20210120 PL - New Zealand TA - Diabetes Metab Syndr Obes JT - Diabetes, metabolic syndrome and obesity : targets and therapy JID - 101515585 PMC - PMC7829128 OTO - NOTNLM OT - EPB41L4A-AS1 OT - MYD88 OT - NF-kappaB OT - diabetes OT - inflammation COIS- The authors report no conflicts of interest in this work. EDAT- 2021/01/29 06:00 MHDA- 2021/01/29 06:01 PMCR- 2021/01/20 CRDT- 2021/01/28 05:41 PHST- 2020/09/06 00:00 [received] PHST- 2020/12/30 00:00 [accepted] PHST- 2021/01/28 05:41 [entrez] PHST- 2021/01/29 06:00 [pubmed] PHST- 2021/01/29 06:01 [medline] PHST- 2021/01/20 00:00 [pmc-release] AID - 280765 [pii] AID - 10.2147/DMSO.S280765 [doi] PST - epublish SO - Diabetes Metab Syndr Obes. 2021 Jan 20;14:265-277. doi: 10.2147/DMSO.S280765. eCollection 2021.