Increased lipopolysaccharide content is positively correlated with glucocorticoid receptor‐beta expression in chronic rhinosinusitis with nasal polyps

Autor:	Ke-Sheng Zhu, Shi-Ming Chen, Shui-Bin Wang, Long Chen, Xiao-Yan Zou, Bin Zhou
Rok vydání:	2020
Předmět:	Adult Lipopolysaccharides Male lcsh:Immunologic diseases. Allergy 0301 basic medicine Adolescent Lipopolysaccharide Immunology chronic rhinosinusitis with nasal polyps Young Adult 03 medical and health sciences chemistry.chemical_compound Nasal Polyps Receptors Glucocorticoid 0302 clinical medicine Glucocorticoid receptor Escherichia coli Humans Immunology and Allergy Medicine Nasal polyps Sinusitis Rhinitis Original Research Cluster of differentiation biology business.industry CD68 lipopolysaccharide Middle Aged medicine.disease 030104 developmental biology medicine.anatomical_structure chemistry Myeloperoxidase Chronic Disease biology.protein Female lcsh:RC581-607 business 030215 immunology Respiratory tract
Zdroj:	Immunity, Inflammation and Disease, Vol 8, Iss 4, Pp 605-614 (2020) Immunity, Inflammation and Disease
ISSN:	2050-4527
DOI:	10.1002/iid3.346
Popis:	Introduction Chronic rhinosinusitis with nasal polyps (CRSwNP) is a common and frequently occurring disease of the upper respiratory tract. The nasal instillation of the Gram‐negative (G−) bacterial product lipopolysaccharide (LPS) can induce not only acute sinusitis but also the development of CRSwNP in animal models. Nevertheless, the expression and distribution of LPS in patients with CRSwNP have not been investigated. And the study was to investigate the expression of LPS and its relationship with glucocorticoid receptors (GRs) in CRSwNP. Methods Multiple methods, including bacterial culture and immunohistochemistry, were used to detect and analyze nasal bacteria, plasma LPS content, and the levels of LPS and GR‐α/β, cluster of differentiation 68 (CD68), and myeloperoxidase (MPO) expression, as well as their relationship in CRSwNP. Results The number of G− bacteria and Escherichia coli (E. coli) was not significantly different between CRSwNP subjects and the controls. However, the positive rate of LPS was much higher than that of E. coli in CRSwNP subjects and was significantly higher in noneosinophilic CRSwNP subjects than in eosinophilic CRSwNP subjects. Moreover, the LPS levels were positively correlated with GR‐β but not GR‐α expression in CRSwNP. Immunofluorescence assays showed that LPS was mainly detected in CD68+ macrophages and MPO+ neutrophils, in addition to histiocytes, in CRSwNP. Conclusions Persistent LPS in CRSwNP can lead to unresolved mucosal inflammation, eventually leading to tissue remodeling and the development of CRSwNP. Our findings suggest that increased LPS content and possible resistance to glucocorticoids may be one of the important pathogenic mechanisms of G− bacteria in CRSwNP. We used bacterial culture and immunohistochemistry to find that the positive rate of lipopolysaccharide (LPS) was much higher than that of Escherichia coli in chronic rhinosinusitis with nasal polyps (CRSwNP), and the LPS levels were positively correlated with glucocorticoid receptor‐β (GR‐β) expression in CRSwNP. Our findings suggest increased LPS content and possible resistance to glucocorticoids may be one of the important pathogenic mechanisms of G‐negative bacteria in CRSwNP.
Databáze:	OpenAIRE
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