5/6 nephrectomy affects enteric glial cells and promotes impaired antioxidant defense in the colonic neuromuscular layer.

Autor: Almeida PP; Cardiovascular Sciences Post Graduate Program, Fluminense Federal University (UFF), Niterói, RJ, Brazil. Electronic address: almeidapatricia@id.uff.br., Thomasi BBM; Laboratory of Inflammation, Oswaldo Cruz Institute (IOC-FIOCRUZ), Rio de Janeiro, RJ, Brazil., Menezes ÁC; Cardiovascular Sciences Post Graduate Program, Fluminense Federal University (UFF), Niterói, RJ, Brazil., Da Cruz BO; Cardiovascular Sciences Post Graduate Program, Fluminense Federal University (UFF), Niterói, RJ, Brazil., Costa NDS; Cardiovascular Sciences Post Graduate Program, Fluminense Federal University (UFF), Niterói, RJ, Brazil., Brito ML; Nutrition Graduation, Fluminense Federal University (UFF), Niterói, RJ, Brazil., Pereira AD; Vassouras University, Maricá, RJ, Brazil., Castañon CR; Clinic and Animal Reproduction Post Graduate Program, Fluminense Federal University (UFF), Niterói, RJ, Brazil., Degani VAN; Clinic and Animal Reproduction Post Graduate Program, Fluminense Federal University (UFF), Niterói, RJ, Brazil., Magliano DC; Cardiovascular Sciences Post Graduate Program, Fluminense Federal University (UFF), Niterói, RJ, Brazil; Morphology Department, Biomedical Institute, Fluminense Federal University (UFF), Niterói, RJ, Brazil., Knauf C; Institut de Recherche en Santé Digestive, Université Paul Sabatier (UPS), Toulouse, France., Tavares-Gomes AL; Neuroscience Post Graduate Program, Fluminense Federal University (UFF), Niterói, RJ, Brazil., Stockler-Pinto MB; Cardiovascular Sciences Post Graduate Program, Fluminense Federal University (UFF), Niterói, RJ, Brazil; Nutrition Sciences Post Graduate Program, Fluminense Federal University (UFF), Niterói, RJ, Brazil.
Jazyk: angličtina
Zdroj: Life sciences [Life Sci] 2022 Jun 01; Vol. 298, pp. 120494. Date of Electronic Publication: 2022 Mar 23.
DOI: 10.1016/j.lfs.2022.120494
Abstrakt: Aims: Chronic kidney disease (CKD) produces multiple repercussions in the gastrointestinal tract (GIT), such as alterations in motility, gut microbiota, intestinal permeability, and increased oxidative stress. However, despite enteric glial cells (EGC) having important neural and immune features in GIT physiology, their function in CKD remains unknown. The present study investigates colonic glial markers, inflammation, and antioxidant parameters in a CKD model.
Main Methods: A 5/6 nephrectomized rat model was used to induce CKD in rats and Sham-operated animals as a control to suppress. Biochemical measures in plasma and neuromuscular layer such as glutathione peroxidase (GPx) and superoxide dismutase (SOD) activity were carried out. Kidney histopathology was evaluated. Colon morphology analysis and glial fibrillary acid protein (GFAP), connexin-43 (Cx43), nuclear factor-kappa B (NF-κB) p65, and GPx protein expression were performed.
Key Findings: The CKD group exhibited dilated tubules and tubulointerstitial fibrosis in the reminiscent kidney (p = 0.0002). CKD rats showed higher SOD activity (p = 0.004) in plasma, with no differences in neuromuscular layer (p = 0.9833). However, GPx activity was decreased in the CKD group in plasma (p = 0.013) and neuromuscular layer (p = 0.0338). Morphological analysis revealed alterations in colonic morphometry with inflammatory foci in the submucosal layer and neuromuscular layer straightness in CKD rats (p = 0.0291). In addition, GFAP, Cx43, NF-κBp65 protein expression were increased, and GPx decreased in the neuromuscular layer of the CKD group (p < 0.05).
Significance: CKD animals present alterations in colonic cytoarchitecture and decreased layer thickness. Moreover, CKD affects the enteric glial network of the neuromuscular layer, associated with decreased antioxidant activity and inflammation.
(Copyright © 2022 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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