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SIV Infection Facilitates Mycobacterium tuberculosis Infection of Rhesus Macaques.


ABSTRACT: Tuberculosis (TB) is a common opportunistic infection and the leading cause of death for human immunodeficiency virus (HIV)-infected patients. Thus, it is necessary to understand the pathogenetic interactions between M.tb and HIV infection. In this study, we examined M.tb and/or simian immunodeficiency virus (SIV) infection of Chinese rhesus macaques. While there was little evidence that M.tb enhanced SIV infection of macaques, SIV could facilitate M.tb infection as demonstrated by X-rays, pathological and microbiological findings. Chest X-rays showed that co-infected animals had disseminated lesions in both left and right lungs, while M.tb mono-infected animals displayed the lesions only in right lungs. Necropsy of co-infected animals revealed a disseminated M.tb infection not only in the lungs but also in the extrapulmonary organs including spleen, pancreas, liver, kidney, and heart. The bacterial counts in the lungs, the bronchial lymph nodes, and the extrapulmonary organs of co-infected animals were significantly higher than those of M.tb mono-infected animals. The mechanistic studies demonstrated that two of three co-infected animals had lower levels of M.tb specific IFN-? and IL-22 in PBMCs than M.tb mono-infected animals. These findings suggest that Chinese rhesus macaque is a suitable and alternative non-human primate model for SIV/M.tb coinfection studies. The impairment of the specific anti-TB immunity is likely to be a contributor of SIV-mediated enhancement M.tb infection.

SUBMITTER: Guo M 

PROVIDER: S-EPMC5233680 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature

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SIV Infection Facilitates <i>Mycobacterium tuberculosis</i> Infection of Rhesus Macaques.

Guo Ming M   Xian Qiao-Yang QY   Rao Yan Y   Zhang Jing J   Wang Yong Y   Huang Zhi-Xiang ZX   Wang Xin X   Bao Rong R   Zhou Li L   Liu Jin-Biao JB   Tang Zhi-Jiao ZJ   Guo De-Yin DY   Qin Chuan C   Li Jie-Liang JL   Ho Wen-Zhe WZ  

Frontiers in microbiology 20170113


Tuberculosis (TB) is a common opportunistic infection and the leading cause of death for human immunodeficiency virus (HIV)-infected patients. Thus, it is necessary to understand the pathogenetic interactions between <i>M.tb</i> and HIV infection. In this study, we examined <i>M.tb</i> and/or simian immunodeficiency virus (SIV) infection of Chinese rhesus macaques. While there was little evidence that <i>M.tb</i> enhanced SIV infection of macaques, SIV could facilitate <i>M.tb</i> infection as d  ...[more]

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