PMID- 38409842 OWN - NLM STAT- MEDLINE DCOM- 20240228 LR - 20240228 IS - 1944-7930 (Electronic) IS - 1539-6509 (Linking) VI - 36 IP - 181 DP - 2024 Feb TI - Down-Regulation of INSR Restores Th17/Treg Immune Balance and Alleviates Airway Hyperviscosity in Asthmatic Mice via Inactivation of STAT3 Pathway. PG - 372-384 LID - 10.24976/Discov.Med.202436181.35 [doi] AB - BACKGROUND: Allergic asthma (AA) is a prevalent chronic airway inflammation disease. In this study, this study aims to investigate the biological functions and potential regulatory mechanisms of the insulin receptor (INSR) in the progression of AA. METHODS: BALB/c mice (n = 48) were randomly divided into the following groups: control group, AA group, AA+Lentivirus (Lv)-vector short hairpin RNA (shRNA) group, AA+Lv-vector group, AA+Lv-INSR shRNA group, and AA+Lv-INSR group. The pulmonary index was calculated. mRNA and protein expression levels of INSR, signal transducer and activator of transcription 3 (STAT3), Janus kinase 2 (JAK2), phosphorylated-STAT3 (p-STAT3), phosphorylated-JAK2 (p-JAK2), alpha-smooth muscle actin (alpha-SMA), febrile neutropenia (FN), mucin 5AC (MUC5AC), and mucin 5B (MUC5B) were examined using reverse-transcription quantitative PCR (RT-qPCR) and western blot assays. Positive expressions of INSR, retinoic acid-related orphan receptor gamma-t (RORgammat), and forkhead box protein P3 (Foxp3) were quantified by immunohistochemistry. Fluorescence intensities of alpha-SMA and FN were detected by immunofluorescence. Pathological morphology was observed through hematoxylin-eosin (H&E) staining, Masson staining, and Periodic Acid-Schiff (PAS) staining. Contents of immunoglobulin E (IgE), interleukin-6 (IL-6), eotaxin, interleukin-4 (IL-4), interleukin-13 (IL-13), interferon-gamma (IFN-gamma), interleukin-17 (IL-17), and interleukin-10 (IL-10) were quantified using enzyme-linked immunosorbent assay (ELISA). The percentage of T helper 17 (Th17) and regulatory T (Treg) cells was determined through flow cytometry. RESULTS: Compared to the control group, expression levels of INSR, p-STAT3, p-JAK2, alpha-SMA, FN, MUC5AC, MUC5B, RORgammat, and Foxp3, as well as IgE, IL-6, eotaxin, IL-4, IL-13, and IL-17 contents, pulmonary index, glycogen-positive area (%), and Th17 cell percentage significantly increased (p < 0.05). Additionally, pulmonary histopathological deterioration and collagen deposition were aggravated, while Treg cell percentage and IFN-gamma and IL-10 contents remarkably decreased (p < 0.05). The overexpression of INSR further exacerbated the progression of allergic asthma, but the down-regulation of INSR reversed the trends of the above indicators. CONCLUSIONS: The down-regulation of INSR alleviates airway hyperviscosity, inflammatory infiltration, and airway remodeling, restoring Th17/Treg immune balance in AA mice by inactivating the STAT3 pathway. FAU - Jin, Xuanlin AU - Jin X AD - Laboratory Medical College, Wenzhou Medical University, 325006 Wenzhou, Zhejiang, China. FAU - Wang, Jin AU - Wang J AD - Department of Pediatric, Beiyuan Community Health Service Center in Yiwu, 322000 Jinhua, Zhejiang, China. LA - eng PT - Journal Article PL - United States TA - Discov Med JT - Discovery medicine JID - 101250006 RN - 130068-27-8 (Interleukin-10) RN - 0 (Interleukin-17) RN - 207137-56-2 (Interleukin-4) RN - 0 (Interleukin-13) RN - 0 (Interleukin-6) RN - 0 (STAT3 Transcription Factor) RN - 0 (Nuclear Receptor Subfamily 1, Group F, Member 3) RN - EC 2.7.10.1 (Receptor, Insulin) RN - 37341-29-0 (Immunoglobulin E) RN - 0 (Forkhead Transcription Factors) RN - 0 (RNA, Small Interfering) RN - Pulmonary Disease, Chronic Obstructive, Severe Early-Onset SB - IM MH - Mice MH - Animals MH - *Interleukin-10 MH - Interleukin-17/genetics/metabolism MH - Interleukin-4/genetics/metabolism MH - T-Lymphocytes, Regulatory/metabolism/pathology MH - Interleukin-13/genetics/metabolism MH - Interleukin-6/metabolism MH - Down-Regulation MH - STAT3 Transcription Factor/genetics/metabolism MH - Nuclear Receptor Subfamily 1, Group F, Member 3/genetics/metabolism MH - Receptor, Insulin/genetics/metabolism MH - *Asthma/metabolism/pathology MH - Immunoglobulin E/genetics/metabolism MH - Forkhead Transcription Factors/genetics/metabolism MH - RNA, Small Interfering MH - *Pulmonary Disease, Chronic Obstructive OTO - NOTNLM OT - INSR OT - STAT3 pathway OT - Th17/Treg immune balance OT - airway hyperviscosity OT - allergic asthma EDAT- 2024/02/27 06:45 MHDA- 2024/02/28 06:45 CRDT- 2024/02/27 02:29 PHST- 2024/02/28 06:45 [medline] PHST- 2024/02/27 06:45 [pubmed] PHST- 2024/02/27 02:29 [entrez] AID - 1708325321541-1224791587 [pii] AID - 10.24976/Discov.Med.202436181.35 [doi] PST - ppublish SO - Discov Med. 2024 Feb;36(181):372-384. doi: 10.24976/Discov.Med.202436181.35.