The stringent response is required for full virulence of Mycobacterium tuberculosis in guinea pigs.
The stringent response is required for full virulence of Mycobacterium tuberculosis in guinea pigs.
复制标题
DOI:
10.1086/656524
复制
发表时间:
2010-11-01
期刊:
影响因子:
--
通讯作者:
Karakousis PC
中科院分区:
文献类型:
--
作者:
Klinkenberg LG;Lee JH;Bishai WR;Karakousis PC
During human latent tuberculosis (TB) infection, Mycobacterium tuberculosis likely resides within the nutrient-starved environment of caseous lung granulomas. The stringent response alarmone (p)ppGpp is synthesized by Rel in response to nutrient starvation, thus enabling tubercle bacilli to restrict growth and shut down metabolism in a coordinated fashion. In this study, we investigated the virulence of a rel-deficient M. tuberculosis mutant in the guinea pig model. Quantitative RT-PCR was used to study the effect of (p)ppGpp deficiency on expression of key cytokine and chemokine genes in guinea pig lungs. The rel-deficient mutant showed impaired initial growth and survival relative to the wild-type strain. Loss of Rel was associated with the striking absence of tubercle lesions grossly and of caseous granulomas histologically. The attenuated phenotype of the rel-deficient mutant was not associated with increased expression of genes encoding the proinflammatory cytokines IFN-γ and TNF-α in the lungs 28 days after infection.
登录
查看更多内容
影响因子:
3.7
作者:
HUYGEN, K;VANVOOREN, JP;DEBRUYN, J
通讯作者:
DEBRUYN, J
影响因子:
64.5
作者:
Artsimovitch, I;Patlan, V;Vassylyev, DG
通讯作者:
Vassylyev, DG
DOI:
10.1073/pnas.1631248100
发表时间:
2003-08-19
影响因子:
11.1
作者:
Dahl, JL;Kraus, CN;Barry, CE
通讯作者:
Barry, CE
影响因子:
3.1
作者:
Allen, SS;McMurray, DN
通讯作者:
McMurray, DN
影响因子:
3.1
作者:
Kaplan, G;Post, FA;Bekker, LG
通讯作者:
Bekker, LG