PMID- 38422887 OWN - NLM STAT- MEDLINE DCOM- 20240313 LR - 20240314 IS - 1872-9142 (Electronic) IS - 0161-5890 (Linking) VI - 168 DP - 2024 Apr TI - Silencing of forkhead box C1 reduces nasal epithelial barrier damage in mice with allergic rhinitis via epigenetically upregulating secreted frizzled-related protein 5. PG - 51-63 LID - S0161-5890(24)00037-3 [pii] LID - 10.1016/j.molimm.2024.02.011 [doi] AB - Allergic rhinitis (AR) is caused by immunoglobulin E (IgE)-mediated reactions to inhaled allergens, which leads to mucosal inflammation and barrier dysfunction. The transcription factor forkhead box C1 (FOXC1) has been identified to be associated with allergic inflammation. This study sought to uncover the role of FOXC1 in AR. A murine model of AR was induced by repeated intranasal ovalbumin (OVA) challenges. Results revealed that high FOXC1 expression was found in the nasal mucosal epithelium of AR mice. Nasal allergy symptoms, mucosal epithelial swelling, goblet cell hyperplasia and eosinophil infiltration in AR mice were attenuated after silencing of FOXC1. Knockdown of FOXC1 decreased the levels of T-helper 2 cytokines interleukin(IL)-4 and IL-13 in nasal lavage fluid, and serum OVA-specific IgE and histamine. Silencing of FOXC1 restored nasal epithelial integrity in AR mice by enhancing the expression of tight junctions (TJs) and adherence junction. Furthermore, knocking down FOXC1 increased tight junction expression and transepithelial electrical resistance (TEER) in IL-13-treated air-liquid interface (ALI) cultures of human nasal epithelial cells (HNEpCs). Mechanistically, silencing of FOXC1 induced DNA methylation of secreted frizzled-related protein 5 (SFRP5) promoter and increased its expression in the nasal mucosa of AR mice and IL-13-treated ALI cultures. FOXC1 overexpression transcriptionally activated DNA methyltransferase 3B (DNMT3B) in IL-13-treated ALI cultures. Knockdown of SFRP5 reversed the protection of FOXC1 silencing on epithelial barrier damage induced by IL-13. Collectively, silencing of FOXC1 reduced allergic inflammation and nasal epithelial barrier damage in AR mice via upregulating SFRP5, which may be attribute to DNMT3B-driven DNA methylation. Our study indicated that FOXC1 may represent a potential therapeutic target for AR. CI - Copyright (c) 2024 Elsevier Ltd. All rights reserved. FAU - Shi, Zhaohui AU - Shi Z AD - Department of Otolaryngology, Shenzhen Longgang Otolaryngology Hospital & Shenzhen Otolaryngology Research Institute, Shenzhen 518172, Guangdong, China; Department of Otorhinolaryngology-Head and Neck Surgery, Department of Allergy, Naso-Orbital-Maxilla and Skull Base Center, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, Guangdong, China. Electronic address: shizhh35@mail.sysu.edu.cn. FAU - Zhao, Tianfeng AU - Zhao T AD - Department of Otorhinolaryngology-Head and Neck Surgery, The First Affiliated Hospital of AFMU (Xijing Hospital), Air force Medical University, Xi'an 710032, Shaanxi , China. FAU - Li, Dingbo AU - Li D AD - Department of Otolaryngology, Shenzhen Longgang Otolaryngology Hospital & Shenzhen Otolaryngology Research Institute, Shenzhen 518172, Guangdong, China. FAU - Wang, Chong AU - Wang C AD - Department of Otolaryngology, Shenzhen Longgang Otolaryngology Hospital & Shenzhen Otolaryngology Research Institute, Shenzhen 518172, Guangdong, China. FAU - Luo, Yanjie AU - Luo Y AD - Department of Otolaryngology, Shenzhen Longgang Otolaryngology Hospital & Shenzhen Otolaryngology Research Institute, Shenzhen 518172, Guangdong, China; Department of Otorhinolaryngology-Head and Neck Surgery, Department of Allergy, Naso-Orbital-Maxilla and Skull Base Center, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, Guangdong, China. FAU - Zheng, Yangshan AU - Zheng Y AD - Department of Otolaryngology, Shenzhen Longgang Otolaryngology Hospital & Shenzhen Otolaryngology Research Institute, Shenzhen 518172, Guangdong, China. LA - eng PT - Journal Article DEP - 20240229 PL - England TA - Mol Immunol JT - Molecular immunology JID - 7905289 RN - 0 (Cytokines) RN - 37341-29-0 (Immunoglobulin E) RN - 0 (Interleukin-13) RN - 9006-59-1 (Ovalbumin) RN - 0 (Secreted Frizzled-Related Proteins) RN - 0 (Sfrp5 protein, mouse) RN - 0 (Foxc1 protein, mouse) SB - IM MH - Animals MH - Humans MH - Mice MH - Cytokines/metabolism MH - Disease Models, Animal MH - Immunoglobulin E/metabolism MH - Inflammation/metabolism MH - Interleukin-13/metabolism MH - Mice, Inbred BALB C MH - Nasal Mucosa/metabolism MH - Ovalbumin/metabolism MH - *Rhinitis, Allergic/genetics/drug therapy MH - *Secreted Frizzled-Related Proteins OTO - NOTNLM OT - Allergic rhinitis OT - DNA methylation OT - Forkhead box C1 OT - Nasal epithelial barrier integrity OT - Secreted frizzled-related protein 5 COIS- Declaration of Competing Interest The authors declare that they have no competing interests. EDAT- 2024/03/01 01:22 MHDA- 2024/03/13 06:46 CRDT- 2024/02/29 18:14 PHST- 2023/11/02 00:00 [received] PHST- 2024/02/04 00:00 [revised] PHST- 2024/02/13 00:00 [accepted] PHST- 2024/03/13 06:46 [medline] PHST- 2024/03/01 01:22 [pubmed] PHST- 2024/02/29 18:14 [entrez] AID - S0161-5890(24)00037-3 [pii] AID - 10.1016/j.molimm.2024.02.011 [doi] PST - ppublish SO - Mol Immunol. 2024 Apr;168:51-63. doi: 10.1016/j.molimm.2024.02.011. Epub 2024 Feb 29.