Abstract |
The epithelial barrier regulates the movement of ions, macromolecules, immune cells and pathogens. The objective of this study was to investigate the role of the matrix metalloproteinase (MMP)-9 in the degradation of tight junction protein during infection with rat nematode lungworm Angiostrongylus cantonensis. The results showed that phosphorylation of IκB and NF-κB was increased in mice with eosinophilic meningoencephalitis. Treatment with MG132 reduced the phosphorylation of NF-κB and the activity of MMP-9, indicating upregulation of MMP-9 through the NF-κB signaling pathway. Claudin-5 was reduced in the brain but elevated in the cerebrospinal fluid (CSF), implying that A. cantonensis infection caused tight junction breakdown and led to claudin-5 release into the CSF. Degradation of claudin-5 coincided with alteration of the blood-CSF barrier permeability and treatment with the MMP inhibitor GM6001 attenuated the degradation of claudin-5. These results suggested that degradation of claudin-5 was caused by MMP-9 in angiostrongyliasis meningoencephalitis. Claudin-5 could be used for the pathophysiologic evaluation of the blood-CSF barrier breakdown and tight junction disruption after infection with A. cantonensis.
|
Authors | Ping-Sung Chiu, Shih-Chan Lai |
Journal | PloS one
(PLoS One)
Vol. 8
Issue 3
Pg. e53370
( 2013)
ISSN: 1932-6203 [Electronic] United States |
PMID | 23505411
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
|
Chemical References |
- Claudin-5
- Dipeptides
- Leupeptins
- N-(2(R)-2-(hydroxamidocarbonylmethyl)-4-methylpentanoyl)-L-tryptophan methylamide
- NF-kappa B
- Matrix Metalloproteinase 9
- benzyloxycarbonylleucyl-leucyl-leucine aldehyde
|
Topics |
- Angiostrongylus cantonensis
(immunology)
- Animals
- Brain
(metabolism, parasitology, pathology)
- Cerebrospinal Fluid
(immunology, metabolism)
- Claudin-5
(metabolism)
- Dipeptides
(administration & dosage)
- Disease Models, Animal
- Eosinophils
(immunology)
- Leupeptins
(administration & dosage)
- Male
- Matrix Metalloproteinase 9
(metabolism)
- Meningoencephalitis
(drug therapy, immunology, metabolism)
- Mice
- Models, Biological
- NF-kappa B
(metabolism)
- Proteolysis
- Signal Transduction
- Strongylida Infections
(drug therapy, immunology, metabolism)
|