The influence of autophagy on mouse inflammatory response caused by Salmonella enterica serovar Typhimurium with spv genes

LI Yuan-Yuan; WU Shu-Yan; CHU Yuan-Yuan; LIAO LI; LI Qiong; HUANG Rui

Journal of Microbes and Infections ›› 2011, Vol. 6 ›› Issue (4) : 205-213.

PDF(9144 KB)
Welcome to visit Journal of Microbes and Infections,
PDF(9144 KB)
Journal of Microbes and Infections ›› 2011, Vol. 6 ›› Issue (4) : 205-213.
Article

The influence of autophagy on mouse inflammatory response caused by Salmonella enterica serovar Typhimurium with spv genes

  • LI Yuan-Yuan; WU Shu-Yan; CHU Yuan-Yuan; LIAO LI; LI Qiong; HUANG Rui
Author information +
History +

Abstract

An investigation into the effects of Salmonella plasmid virulence genes (spv) on autophagy, apoptosis, and inflammation was carried out in mice, using a strain of Salmonella enterica serovar Typhimurium (S. typhimurium) SR-11 carrying spv. Strain BRD509 without spv was used as a control. Results showed that the expression of autophagy protein Beclin-1 in the livers and spleens in the SR-11 group was lower than that in the BRD509 group, while the apoptosis protein, Cspase-3, was higher in the SR-11 group. Inflammatory cytokine levels [interleukon 12 (IL-12) and interferon γ (FN-γ)] were higher in the SR-11 group compared with those in the BRD509 group since 4 d post-infection. In addition, we found an increase in severe pathological changes and larger viable bacterial amounts in livers and spleens in the SR-11 group. After intervention with autophagy agonist rapamycin (RAPA), Beclin-1 expression increased in both groups, while Caspase-3 expression was different between the two groups:Caspase-3 decreased in the SR-11 group but increased in the BRD509 group. Moreover, RAPA decreased cytokine levels, bacterial quantity and organ-related injury in the SR-11 group whereas RAPA increased cytokine levels and aggravated organ injury in the BRD509 group. Results from these studies suggest that S. typhimurium with spv genes may exacerbate infection by inhibiting autophagy and affecting the production of inflammatory cytokines. RAPA-enhanced autophagy may improve the secretion of cytokines in order to protect the host from damaging by Salmonella infection. Our study suggests that the regulation of cellular autophagy may play a role in the prevention and control of certain infectious diseases.

Key words

 Apoptosis / Autophagy / inflammation / Salmonella / spv

Cite this article

Download Citations
LI Yuan-Yuan; WU Shu-Yan; CHU Yuan-Yuan; LIAO LI; LI Qiong; HUANG Rui. The influence of autophagy on mouse inflammatory response caused by Salmonella enterica serovar Typhimurium with spv genes[J]. Journal of Microbes and Infections. 2011, 6(4): 205-213
PDF(9144 KB)

Accesses

Citation

Detail

Sections
Recommended

/