Abstract:
:During tuberculosis (TB) infection, the granuloma provides the microenvironment in which antigen-specific T cells colocate with and activate infected macrophages to inhibit the growth of Mycobacterium tuberculosis. Although the granuloma is the site for mycobacterial killing, virulent mycobacteria have developed a variety of mechanisms to resist this macrophage-mediated killing. These surviving mycobacteria become dormant, however, if host cellular immunity or the signals maintaining granuloma structure wane, or if mycobacteria resume replication, leading to reactivation of TB. This balance of life and death applies not only to the mycobacterium but also to the host macrophages that may undergo apoptosis or necrosis, leading to the characteristic caseous necrosis within the granuloma, and the potential spread of TB infection. The immunological factors controlling the development and maintenance of the granuloma will be reviewed.
journal_name
Immunol Cell Bioljournal_title
Immunology and cell biologyauthors
Saunders BM,Britton WJdoi
10.1038/sj.icb.7100027subject
Has Abstractpub_date
2007-02-01 00:00:00pages
103-11issue
2eissn
0818-9641issn
1440-1711pii
7100027journal_volume
85pub_type
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journal_title:Immunology and cell biology
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更新日期:2007-06-01 00:00:00
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journal_title:Immunology and cell biology
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