Strain-dependent CNS dissemination in guinea pigs after Mycobacterium tuberculosis aerosol challenge.

Strain-dependent CNS dissemination in guinea pigs after Mycobacterium tuberculosis aerosol challenge.
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DOI:
10.1016/j.tube.2011.07.003
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发表时间:
2011-09
期刊:
Tuberculosis (Edinburgh, Scotland)
影响因子:
--
通讯作者:
Jain SK
Jain SK
中科院分区:
其他
文献类型:
--
作者:
Be NA;Klinkenberg LG;Bishai WR;Karakousis PC;Jain SK

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临床报告提示不同结核分枝杆菌菌株与中枢神经系统疾病的关联。因此,我们在豚鼠气溶胶感染模型中检测了不同实验室菌株(2株结核分枝杆菌H37Rv, 1株CDC1551)对中枢神经系统的传播。尽管所有菌株在肺内呈指数增长,且在肺外播散时细菌负荷相似,但结核分枝杆菌CDC1551向中枢神经系统的播散明显多于H37Rv菌株。在整个研究过程中,没有观察到中枢神经系统病变,只有适度的细胞因子反应。这些数据表明结核分枝杆菌可能具有促进中枢神经系统传播的毒力因子,这与肺结核所需的毒力因子不同。
Clinical reports suggest an association of distinct Mycobacterium tuberculosis strains with CNS disease. We therefore examined CNS dissemination by different laboratory strains (two M. tuberculosis H37Rv, one CDC1551) in a guinea pig aerosol infection model. Although all strains grew exponentially in lungs, with similar bacterial burdens at the time of extrapulmonary dissemination, M. tuberculosis CDC1551 disseminated to the CNS significantly more than the H37Rv strains. No CNS lesions were observed throughout the study, with only a modest cytokine response. These data suggest that M. tuberculosis may have virulence factors that promote CNS dissemination, distinct from those required for pulmonary TB.
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