Por favor, use este identificador para citar o enlazar este ítem:
DOI: 10.14670/HH-18-039
Twittear
Título: | Lipopolysaccharide induces the early enhancement of mice colonic mucosal paracellular permeability mainly mediated by mast cells |
Fecha de publicación: | 2019 |
Editorial: | Universidad de Murcia. Departamento de Biología Celular e Histología |
Cita bibliográfica: | Histology and Histopathology, Vol.34, nº2, (2019) |
ISSN: | 1699-5848 0213-3911 |
Materias relacionadas: | CDU::6 - Ciencias aplicadas::61 - Medicina::616 - Patología. Medicina clínica. Oncología |
Palabras clave: | Lipopolysaccharide Degranulation Mast cells Intestinal permeability Acute infection |
Resumen: | The alteration of intestinal mucosal barrier is considered to be the central pathophysiological process in response to gastrointestinal infections, and mucosal microstructural damage is a major factor for enhancing epithelial permeability in persistent bacterial infections. However, the mechanism involved in hyperpermeability in the early stage of acute bacterial infections is not fully understood. In the present study, fluorescein isothiocyanate-dextran across and transepithelial resistance measured in Ussing chambers were used to assess the intestinal paracellular permeability. Mast cell activation was evaluated by western blotting for the presence of tryptase released from mast cells. Serum levels of interleukin-6 were evaluated using enzymelinked immunosorbent assay. Our results indicated that mast cells played a pivotal role in colonic mucosal hyperpermeability in wild type mice treated with lipopolysaccharide (LPS) for 2 h. And the effect of LPS was mainly dependent on mast cell degranulation, while no change in permeability was observed in the mast celldeficient mice (Wads-/- ) after LPS administration. No obvious changes of the mucosal structure including histomorphological architecture and expression of intercellular junction proteins were obtained in either wild type or Wads-/- mice after LPS stimulation by hematoxylin and eosin staining, immunofluorescence staining and western blot analysis. Furthermore, the selfrenewal of intestinal epithelia, detected by using proliferation marker 5’-bromo-2’-deoxyuridine, was not involved in increased permeability. Collectively, activation of mast cells induced by LPS mediated intestinal hyperpermeability in the initial stage, and played a crucial role in barrier dysfunction rather than mucosal microstructural damage in acute enterogenous bacterial infection. |
Autor/es principal/es: | Sun, Tingyi Wang, Yaxi Hu, Shilong Sun, Haimei Yang, Shu Wu, Bo Ji, Fengqing Zhou, Deshan |
URI: | http://hdl.handle.net/10201/121067 |
DOI: | DOI: 10.14670/HH-18-039 |
Tipo de documento: | info:eu-repo/semantics/article |
Número páginas / Extensión: | 10 |
Derechos: | info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional |
Aparece en las colecciones: | Vol.34, nº2 (2019) |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Sun-34-191-200-2019.pdf | 10,63 MB | Adobe PDF | Visualizar/Abrir |
Este ítem está sujeto a una licencia Creative Commons Licencia Creative Commons