1. Academic Validation
  2. Increased IL-1α expression in chronic rhinosinusitis with nasal polyps

Increased IL-1α expression in chronic rhinosinusitis with nasal polyps

  • Eur Arch Otorhinolaryngol. 2022 Sep 27. doi: 10.1007/s00405-022-07640-z.
Yujie Cao  # 1 Xianting Hu  # 1 Chun Zhou  # 1 Keqing Zhao 1 Yaoming Zheng 1 Wenxiu Jiang 1 Dehui Wang 2 Huabin Li 3
Affiliations

Affiliations

  • 1 Allergy Center, Department of Otolaryngology, Affiliated Eye and ENT Hospital, Fudan University, No. 83, Fenyang Road, Shanghai, 200031, China.
  • 2 Allergy Center, Department of Otolaryngology, Affiliated Eye and ENT Hospital, Fudan University, No. 83, Fenyang Road, Shanghai, 200031, China. wangdehuient@sina.com.
  • 3 Allergy Center, Department of Otolaryngology, Affiliated Eye and ENT Hospital, Fudan University, No. 83, Fenyang Road, Shanghai, 200031, China. allergyli@163.com.
  • # Contributed equally.
Abstract

Purpose: To examine whether and how interleukin (IL)-1α is involved in chronic rhinosinusitis with nasal polyps (CRSwNP).

Methods: Nasal polyp (NP) and control tissues were collected from CRSwNP patients and control subjects. The expression of IL-1α and other proinflammatory cytokines (IL-1β, IL-8 and IL-13, etc.), as well as neutrophil and eosinophil accumulation, were examined in sinonasal tissues using immunohistochemical (IHC), immunofluorescent (IF) staining, qPCR, and Luminex, respectively. Moreover, the regulation of IL-1α expression and its effects on other proinflammatory cytokines were evaluated in cultured nasal epithelial cells (NECs).

Results: The mRNA and protein levels of IL-1α were significantly higher in NP tissues compared to that in control tissues. IL-1α in polyp tissues was mainly located in epithelial cells and neutrophils. Polyps IL-1α level was significantly associated with IL-8, IL-1β, IL-6, IL-4 and IL-13 production, as well as tissue neutrophil infiltration. Moreover, poly (I:C), lipopolysaccharides, Flagellin, R848 and cytokines (IL-4, IL-5, and IL-13) significantly increased the expression of IL-1α in cultured NECs in vitro, and recombinant IL-1α significantly promoted production of IL-8 and CXCL1 in cultured NECs.

Conclusions: These findings provided the evidence that IL-1α were significantly increased in NP tissues, which may contribute to tissue neutrophilia in CRSwNP patients in China.

Keywords

Chronic rhinosinusitis; Cytokine; IL-1α; Nasal polyps; Neutrophil.

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