Tumor necrosis factor signaling mediates resistance to mycobacteria by inhibiting bacterial growth and macrophage death.
Tumor necrosis factor signaling mediates resistance to mycobacteria by inhibiting bacterial growth and macrophage death.
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肿瘤坏死因子信号传导通过抑制细菌生长和巨噬细胞死亡来介导对分枝杆菌的抗性。
DOI:
10.1016/j.immuni.2008.06.011
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发表时间:
2008-08-15
期刊:
影响因子:
32.4
通讯作者:
Ramakrishnan, Lalita
中科院分区:
文献类型:
--
作者:
Clay, Hilary;Volkman, Hannah E.;Ramakrishnan, Lalita
Tumor necrosis factor (TNF), a key effector in controlling tuberculosis, is thought to exert protection by directing formation of granulomas, organized aggregates of macrophages and other immune cells. Loss of TNF signaling causes progression of tuberculosis in humans and the increased mortality of Mycobacterium tuberculosis-infected mice is associated with disorganized and necrotic granulomas, though the precise roles of TNF signaling in the stages of pathogenesis preceding this endpoint remain undefined. We monitor transparent Mycobacterium marinum-infected zebrafish live to conduct a stepwise dissection of the effects of TNF signaling in mycobacterial pathogenesis. We find that loss of TNF signaling causes increased mortality even when only innate immunity is operant. In the absence of TNF intracellular bacterial growth and granuloma formation are accelerated followed by necrotic death of overladen macrophages and granuloma breakdown. Thus TNF is not required for tuberculous granuloma formation, but maintains granuloma integrity indirectly by restricting mycobacterial growth within macrophages and preventing their necrosis.
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影响因子:
4.4
作者:
Botha, T;Ryffel, B
通讯作者:
Ryffel, B
DOI:
10.1378/chest.30.6.642
发表时间:
1956-01-01
期刊:
DISEASES OF THE CHEST
影响因子:
--
作者:
DARZINS, E;FAHR, G
通讯作者:
FAHR, G
影响因子:
1.5
作者:
Draper, BW;Morcos, PA;Kimmel, CB
通讯作者:
Kimmel, CB
DOI:
10.1016/s0962-8479(97)90004-6
发表时间:
1997-01-01
期刊:
TUBERCLE AND LUNG DISEASE
影响因子:
--
作者:
Adams, LB;Dinauer, MC;Krahenbuhl, JL
通讯作者:
Krahenbuhl, JL
影响因子:
4.4
作者:
Ehlers, S;Kutsch, S;Pfeffer, K
通讯作者:
Pfeffer, K