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Superior intestinal integrity and limited microbial translocation are associated with lower immune activation in SIVmac239-infected northern pig-tailed macaques(Macaca leonina)

引用

Zoological Research 2019年第6期40卷 522-531页

作者： Ming-Xu Zhang Tian-Zhang Song Hong-Yi Zheng Xue-Hui Wang Ying Lu Han-Dan Zhang Ting Li Wei Pang Yong-Tang Zheng Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences/Key Laboratory of Bioactive Peptides of Yunnan Province National Kunming High Level Biosafety Research Center for Non-human PrimatesKIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common DiseasesKunming Institute of ZoologyChinese Academy of SciencesKunming Yunnan 650223China Kunming College of Life Science University of Chinese Academy of SciencesKunming Yunnan 650204China School of Life Sciences University of Science and Technology of ChinaHefei Anhui 230026China KIZ-SU Joint Laboratory of Animal Models and Drug Development College of Pharmaceutical SciencesSoochow UniversitySuzhou Jiangsu 215123China

Microbial translocation is a cause of systemic immune activation in HIV/SIV infection. In the present study, we found a lower CD8+ T cell activation level in Macaca leonina (northern pig-tailed macaques, NPMs) than in Macaca mulatta (Chinese rhesus macaques, ChRMs) during SIVmac239 infection. Furthermore, the levels of plasma LPS-binding protein and soluble CD14 in NPMs were lower than those in ChRMs. Compared with ChRMs, SIV-infected NPMs had lower Chiu scores, representing relatively normal intestinal mucosa. In addition, no obvious damage to the ileum or colon epithelial barrier was observed in either infected or uninfected NPMs, which differed to that found in ChRMs. Furthermore, no significant microbial translocation (Escherichia coli) was detected in the colon or ileum of infected or uninfected NPMs, which again differed to that observed in ChRMs. In conclusion, NPMs retained superior intestinal integrity and limited microbial translocation during SIV infection, which may contribute to their lower immune activation compared with ChRMs.

关键词： Immune activation Intestinal integrity Microbial translocation SIVmac239 Macaca leonina Northern pig-tailed macaques Macaca mulatta Chinese rhesus macaques

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