NDLI: Old Mice Express a Transient Early Resistance to Pulmonary Tuberculosis That Is Mediated by CD8 T Cells

Content Provider	PubMed Central
Author	Turner, Joanne Frank, Anthony A. Orme, Ian M.
Copyright Year	2002
Abstract	During the natural aging process the immune system undergoes many alterations. In particular, both the CD4 and CD8 T-cell compartments become compromised, and these changes have serious implications for the capacity of the elderly to control infection. As a result, the elderly are more susceptible to many infectious diseases, including primary infection and reactivation of latent infections. In this study we addressed the capacity of old mice to control an infection with Mycobacterium tuberculosis and to characterize the mechanism by which old mice, paradoxically, can express a transient early resistance to infection. This resistance was shown to be associated with the presence of CD8 T cells within the lungs that were capable of secreting gamma interferon, as illustrated by the demonstration that early resistance was lost in aged CD8 gene-disrupted mice. These studies therefore show that, despite a documented decline in general CD8 T-cell responsiveness in the elderly, a subset of CD8 T cells is an important early mediator of protection in the lungs of old mice that have been infected with M. tuberculosis.
Related Links	http://dx.doi.org/10.1128/iai.70.8.4628-4637.2002
Ending Page	4637
Page Count	10
Starting Page	4628
File Format	PDF
ISSN	00199567
e-ISSN	10985522
Journal	Infection and Immunity
Issue Number	8
Volume Number	70
Language	English
Publisher	American Society for Microbiology
Publisher Date	2002-08-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Immunology Microbiology Parasitology Infectious Diseases Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Infectious Diseases Parasitology Immunology Microbiology

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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