PMID- 37325657 OWN - NLM STAT- MEDLINE DCOM- 20230619 LR - 20240315 IS - 1664-3224 (Electronic) IS - 1664-3224 (Linking) VI - 14 DP - 2023 TI - Involvement of CD40-CD40L and ICOS-ICOSL in the development of chronic rhinosinusitis by targeting eosinophils. PG - 1171308 LID - 10.3389/fimmu.2023.1171308 [doi] LID - 1171308 AB - BACKGROUND: Chronic rhinosinusitis (CRS), whose prevalence and pathogenesis are age-related, is characterized by nasal tissue eosinophil infiltration. CD40-CD40 ligand (CD40L) pathway involves in the eosinophil-mediated inflammation, and inducible co-stimulator (ICOS)-ICOS ligand (ICOSL) signal can strengthen CD40-CD40L interaction. Whether CD40-CD40L and ICOS-ICOSL have a role in the development of CRS remains unknown. OBJECTIVES: The aim of this study is to investigate the association of CD40-CD40L and ICOS-ICOSL expression with CRS and underlying mechanisms. METHODS: Immunohistology detected the expression of CD40, CD40L, ICOS, and ICOSL. Immunofluorescence was performed to evaluate the co-localizations of CD40 or ICOSL with eosinophils. Correlations between CD40-CD40L and ICOS-ICOSL as well as clinical parameters were analyzed. Flow cytometry was used to explore the activation of eosinophils by CD69 expression and the CD40 and ICOSL expression on eosinophils. RESULTS: Compared with the non-eCRS subset, ECRS (eosinophilic CRS) subset showed significantly increased CD40, ICOS, and ICOSL expression. The CD40, CD40L, ICOS, and ICOSL expressions were all positively correlated with eosinophil infiltration in nasal tissues. CD40 and ICOSL were mainly expressed on eosinophils. ICOS expression was significantly correlated with the expression of CD40-CD40L, whereas ICOSL expression was correlated with CD40 expression. ICOS-ICOSL expression positively correlated with blood eosinophils count and disease severity. rhCD40L and rhICOS significantly enhanced the activation of eosinophils from patients with ECRS. Tumor necrosis factor-alpha (TNF-alpha) and interleukin-5 (IL-5) obviously upregulated CD40 expression on eosinophils, which was significantly inhibited by the p38 mitogen-activated protein kinase (MAPK) inhibitor. CONCLUSIONS: Increased CD40-CD40L and ICOS-ICOSL expressions in nasal tissues are linked to eosinophils infiltration and disease severity of CRS. CD40-CD40L and ICOS-ICOSL signals enhance eosinophils activation of ECRS. TNF-alpha and IL-5 regulate eosinophils function by increasing CD40 expression partly via p38 MAPK activation in patients with CRS. CI - Copyright (c) 2023 Zhou, Shi, Fan, Zheng, Wang, Liu, Xie, Liu and Jiao. FAU - Zhou, Aina AU - Zhou A AD - Department of Ear, Nose, and Throat, The First Affiliated Hospital of Soochow University, Suzhou, China. FAU - Shi, Chenxi AU - Shi C AD - Department of Pathology, The First Affiliated Hospital of Soochow University, Suzhou, China. FAU - Fan, Yuhui AU - Fan Y AD - Department of Ear, Nose, and Throat, The First Affiliated Hospital of Soochow University, Suzhou, China. FAU - Zheng, Yushuang AU - Zheng Y AD - Department of Pathology, The First Affiliated Hospital of Soochow University, Suzhou, China. FAU - Wang, Jue AU - Wang J AD - Department of Ear, Nose, and Throat, The First Affiliated Hospital of Soochow University, Suzhou, China. FAU - Liu, Zhichen AU - Liu Z AD - Department of Ear, Nose, and Throat, The First Affiliated Hospital of Soochow University, Suzhou, China. FAU - Xie, Huanxia AU - Xie H AD - Department of Ear, Nose, and Throat, The First Affiliated Hospital of Soochow University, Suzhou, China. FAU - Liu, Jisheng AU - Liu J AD - Department of Ear, Nose, and Throat, The First Affiliated Hospital of Soochow University, Suzhou, China. FAU - Jiao, Qingqing AU - Jiao Q AD - Department of Dermatology, The First Affiliated Hospital of Soochow University, Suzhou, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20230601 PL - Switzerland TA - Front Immunol JT - Frontiers in immunology JID - 101560960 RN - 147205-72-9 (CD40 Ligand) RN - 0 (Interleukin-5) RN - 0 (Tumor Necrosis Factor-alpha) RN - 0 (CD40 Antigens) RN - 0 (Interleukin-2) RN - 0 (ICOS protein, human) RN - 0 (Inducible T-Cell Co-Stimulator Protein) SB - IM MH - Humans MH - *CD40 Ligand MH - Eosinophils/metabolism MH - Interleukin-5 MH - Tumor Necrosis Factor-alpha MH - CD40 Antigens MH - *Eosinophilia/metabolism MH - Interleukin-2 MH - Inducible T-Cell Co-Stimulator Protein PMC - PMC10267736 OTO - NOTNLM OT - CD40-CD40L OT - ICOS-ICOSL OT - IL-5 OT - TNF-alpha OT - chronic rhinosinusitis OT - eosinophils OT - p38 MAPK COIS- The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2023/06/16 06:42 MHDA- 2023/06/19 13:08 PMCR- 2023/01/01 CRDT- 2023/06/16 04:27 PHST- 2023/02/22 00:00 [received] PHST- 2023/03/20 00:00 [accepted] PHST- 2023/06/19 13:08 [medline] PHST- 2023/06/16 06:42 [pubmed] PHST- 2023/06/16 04:27 [entrez] PHST- 2023/01/01 00:00 [pmc-release] AID - 10.3389/fimmu.2023.1171308 [doi] PST - epublish SO - Front Immunol. 2023 Jun 1;14:1171308. doi: 10.3389/fimmu.2023.1171308. eCollection 2023.