PMID- 34929342 OWN - NLM STAT- MEDLINE DCOM- 20220210 LR - 20220210 IS - 1879-0038 (Electronic) IS - 0378-1119 (Linking) VI - 813 DP - 2022 Mar 1 TI - IRF4 transcriptionally activate HOTAIRM1, which in turn regulates IRF4 expression, thereby affecting Th9 cell differentiation and involved in allergic rhinitis. PG - 146118 LID - S0378-1119(21)00713-7 [pii] LID - 10.1016/j.gene.2021.146118 [doi] AB - BACKGROUND: Allergic rhinitis (AR) is an inflammatory reaction caused by irritation of nasal mucosa by external allergens, which seriously affects the life of patients. Here, we aimed to investigate the effect and mechanism of long non-coding RNA HOX antisense intergenic RNA myeloid 1 (lncRNA HOTAIRM1) on AR development. METHODS: The nasal mucosa samples were collected from AR patients and AR model mice (induced by ovalbumin). T helper type 9 (Th9) cells were examined by flow cytometry. Fluorescence in situ hybridization was conducted to examine the localization of HOTAIRM1 in CD4(+) T cells. Dual-luciferase reporter assay or RNA immunoprecipitation was conducted to examine the bond between HOTAIRM1 and miR-148a-3p, miR-148a-3p, and interferon regulatory factor 4 (IRF4). Chromatin Immunoprecipitation assay was conducted to detect the interaction between IRF4 and HOTAIRM1 promoter. RESULTS: HOTAIRM1, interleukin-9 (IL-9), and IRF4 were highly expressed in the AR model. The ratio of Th9 cells was increased in AR mice and overexpressing HOTAIRM1 further promoted Th9 cell differentiation, while the effect was reversed after overexpression of miR-148a-3p. Besides, in vivo experiments showed that interfering with HOTAIRM1 reduced the number of sneezing and rubbing movements, reduced immunoglobulin E (IgE) and IL-9 levels, as well as Th9 cells. HOTAIRM1 was expressed in the cytoplasm and the interactions between HOTAIRM1 and miR-148a-3p, miR-148a-3p and IRF4, were confirmed. Furthermore, IRF4 bound to the HOTAIRM1 promoter and promoted its transcriptional activation. CONCLUSION: HOTAIRM1 was highly expressed in the AR model. Besides, IRF4 activated HOTAIRM1 transcription, and HOTAIRM1, in turn, up-regulated IRF4 expression through competitively binding to miR-148a-3p with IRF4, thereby affecting Th9 cell differentiation and participating in the occurrence and development of AR. Our results suggested that interference with HOTAIRM1 might become a treatment for AR. CI - Copyright (c) 2021 Elsevier B.V. All rights reserved. FAU - Li, Lihua AU - Li L AD - Department of Otorhinolaryngology Head and Neck Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, People's Republic of China. FAU - Deng, Jianjian AU - Deng J AD - Department of Otorhinolaryngology Head and Neck Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, People's Republic of China. FAU - Huang, Taojian AU - Huang T AD - Department of Otorhinolaryngology Head and Neck Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, People's Republic of China. FAU - Liu, Ke AU - Liu K AD - Department of Otorhinolaryngology Head and Neck Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, People's Republic of China. FAU - Jiang, Xunshuo AU - Jiang X AD - Department of Otorhinolaryngology Head and Neck Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, People's Republic of China. FAU - Chen, Xubo AU - Chen X AD - Department of Otorhinolaryngology Head and Neck Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, People's Republic of China. FAU - Yang, Chunping AU - Yang C AD - Department of Otorhinolaryngology Head and Neck Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, People's Republic of China. Electronic address: ycp406@sohu.com. LA - eng PT - Journal Article DEP - 20211218 PL - Netherlands TA - Gene JT - Gene JID - 7706761 RN - 0 (Interferon Regulatory Factors) RN - 0 (MicroRNAs) RN - 0 (RNA, Long Noncoding) RN - 0 (interferon regulatory factor-4) RN - 0 (long non-coding RNA HOTAIRM1, human) SB - IM MH - Adult MH - Animals MH - Cell Differentiation/genetics MH - Cell Proliferation/genetics MH - Female MH - Gene Expression MH - Humans MH - In Situ Hybridization, Fluorescence MH - Inflammation/genetics MH - Interferon Regulatory Factors/biosynthesis/*genetics/metabolism MH - Male MH - Mice MH - Mice, Inbred BALB C MH - MicroRNAs/*genetics/metabolism MH - Nasal Mucosa/immunology MH - RNA, Long Noncoding/genetics MH - Rhinitis, Allergic/*genetics/metabolism/pathology MH - Signal Transduction/genetics MH - T-Lymphocytes, Helper-Inducer/metabolism/physiology MH - Transcriptome OTO - NOTNLM OT - Allergic rhinitis OT - IRF4 OT - Mir-148a-3p OT - Th9 cells OT - lncrna HOTAIRM1 EDAT- 2021/12/21 06:00 MHDA- 2022/02/11 06:00 CRDT- 2021/12/20 20:16 PHST- 2021/09/25 00:00 [received] PHST- 2021/11/20 00:00 [revised] PHST- 2021/12/06 00:00 [accepted] PHST- 2021/12/21 06:00 [pubmed] PHST- 2022/02/11 06:00 [medline] PHST- 2021/12/20 20:16 [entrez] AID - S0378-1119(21)00713-7 [pii] AID - 10.1016/j.gene.2021.146118 [doi] PST - ppublish SO - Gene. 2022 Mar 1;813:146118. doi: 10.1016/j.gene.2021.146118. Epub 2021 Dec 18.