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Staphylococcal Enterotoxin A Induces Intestinal Barrier Dysfunction and Activates NLRP3 Inflammasome via NF-κB/MAPK Signaling Pathways in Mice
- Source :
- Toxins, Toxins, Vol 14, Iss 29, p 29 (2022), Toxins; Volume 14; Issue 1; Pages: 29
- Publication Year :
- 2022
- Publisher :
- MDPI, 2022.
-
Abstract
- Staphylococcal enterotoxin A (SEA), the toxin protein secreted by Staphylococcus aureus, can cause staphylococcal food poisoning outbreaks and seriously threaten global public health. However, little is known about the pathogenesis of SEA in staphylococcal foodborne diseases. In this study, the effect of SEA on intestinal barrier injury and NLRP3 inflammasome activation was investigated by exposing BALB/c mice to SEA with increasing doses and a potential toxic mechanism was elucidated. Our findings suggested that SEA exposure provoked villi injury and suppressed the expression of ZO-1 and occludin proteins, thereby inducing intestinal barrier dysfunction and small intestinal injury in mice. Concurrently, SEA significantly up-regulated the expression of NLRP3 inflammasome-associated proteins and triggered the mitogen-activated protein kinase (MAPK) and nuclear factor kappa-B (NF-κB) signaling pathways in jejunum tissues. Notably, selective inhibitors of MAPKs and NF-κB p65 ameliorated the activation of NLRP3 inflammasome stimulated by SEA, which further indicated that SEA could activate NLRP3 inflammasome through NF-κB/MAPK pathways. In summary, SEA was first confirmed to induce intestinal barrier dysfunction and activate NLRP3 inflammasome via NF-κB/MAPK signaling pathways. These findings will contribute to a more comprehensive understanding of the pathogenesis of SEA and related drug-screening for the treatment and prevention of bacteriotoxin-caused foodborne diseases via targeting specific pathways.
- Subjects :
- Male
Inflammasomes
MAP Kinase Signaling System
Health, Toxicology and Mutagenesis
Staphylococcus
Food Contamination
Toxicology
Article
NF-κB
Foodborne Diseases
Enterotoxins
Mice
NLR Family, Pyrin Domain-Containing 3 Protein
Animals
Intestinal Mucosa
Mice, Inbred BALB C
NF-kappa B
MAPK
NLRP3 inflammasome
Disease Models, Animal
Intestinal Diseases
staphylococcal enterotoxin A
Medicine
Mitogen-Activated Protein Kinases
intestinal barrier dysfunction
Signal Transduction
Subjects
Details
- Language :
- English
- ISSN :
- 20726651
- Volume :
- 14
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Toxins
- Accession number :
- edsair.doi.dedup.....a2db4e4a633fc3cadc2c611388cbc2c4