PMID- 36705419 OWN - NLM STAT- MEDLINE DCOM- 20230131 LR - 20230215 IS - 2050-4527 (Electronic) IS - 2050-4527 (Linking) VI - 11 IP - 1 DP - 2023 Jan TI - Angiotensin converting enzyme 2 activation improves allergic rhinitis and suppresses Th2 cytokine release. PG - e763 LID - 10.1002/iid3.763 [doi] LID - e763 AB - OBJECTIVE: Allergic rhinitis (AR) is primarily regulated by type I hypersensitivity, with Th2 and immunoglobulin E (IgE) playing essential roles. This study aimed to determine whether angiotensin converting enzyme (ACE)2 could participate in the regulation of AR. METHODS: Nasal mucosal tissues of AR patients were collected to determine ACE2 levels. Following AR mouse models were established, ACE2 levels in nasal mucosa were determined. Then the influences of diminazene aceturate (ACE2 agonist) on AR symptoms, pathology, specific antibodies, histamine, and interleukins (ILs) release in vivo were evaluated. Afterward, human nasal mucosa epithelial cells were exposed to IL-13, and the impacts of ACE2 overexpression on the secretion of pro-inflammatory factors in vitro were assessed. RESULTS: ACE2 levels significantly declined in nasal mucosa both in patients and mouse models (p < .001). Diminazene aceturate treatment elevated the ACE2 level in mice (p < .01), accompanied by reduced frequency of nasal spray and nasal friction, decreased eosinophils and goblet cells (p < .001) according to histopathological staining. Furthermore, lgE, lgG1, histamine, and IL levels in mice were also decreased (p < .05). In vitro experiments revealed that ACE2 overexpression suppressed the secretion of pro-inflammatory factors (p < .001). CONCLUSION: Together, ACE2 activation can alleviate the symptoms of AR in mice and inhibit the release of Th2 cytokines. Activating ACE2 is a promising therapeutic approach for AR. CI - (c) 2023 The Authors. Immunity, Inflammation and Disease published by John Wiley & Sons Ltd. FAU - Sun, Xiuying AU - Sun X AUID- ORCID: 0000-0003-3388-444X AD - Department of Otorhinostomology, The Affiliated Huaian No. 1 People's Hospital of Nanjing Medical University, Huai'an, Jiangsu, China. FAU - Xu, Yu AU - Xu Y AD - Department of Otorhinostomology, The Affiliated Huaian No. 1 People's Hospital of Nanjing Medical University, Huai'an, Jiangsu, China. FAU - Zhou, Jinhui AU - Zhou J AD - Department of Otorhinostomology, The Affiliated Huaian No. 1 People's Hospital of Nanjing Medical University, Huai'an, Jiangsu, China. LA - eng PT - Journal Article PL - England TA - Immun Inflamm Dis JT - Immunity, inflammation and disease JID - 101635460 RN - EC 3.4.17.23 (Angiotensin-Converting Enzyme 2) RN - 0 (Cytokines) RN - JI8SAD85NO (diminazene aceturate) RN - 820484N8I3 (Histamine) RN - EC 3.4.17.23 (ACE2 protein, human) RN - EC 3.4.17.23 (Ace2 protein, mouse) SB - IM MH - Animals MH - Humans MH - Mice MH - *Angiotensin-Converting Enzyme 2/metabolism MH - *Cytokines/metabolism MH - Histamine MH - *Rhinitis, Allergic/metabolism MH - Th2 Cells PMC - PMC9846113 OTO - NOTNLM OT - ACE2 OT - Th2 OT - allergic rhinitis OT - interleukin OT - lgE COIS- The authors declare no conflict of interest. EDAT- 2023/01/28 06:00 MHDA- 2023/01/31 06:00 PMCR- 2023/01/18 CRDT- 2023/01/27 08:23 PHST- 2022/11/29 00:00 [revised] PHST- 2022/10/18 00:00 [received] PHST- 2022/12/29 00:00 [accepted] PHST- 2023/01/27 08:23 [entrez] PHST- 2023/01/28 06:00 [pubmed] PHST- 2023/01/31 06:00 [medline] PHST- 2023/01/18 00:00 [pmc-release] AID - IID3763 [pii] AID - 10.1002/iid3.763 [doi] PST - ppublish SO - Immun Inflamm Dis. 2023 Jan;11(1):e763. doi: 10.1002/iid3.763.