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The effects of age on the immune response to type III pneumococcal polysaccharide (SIII) and bacterial lipopolysaccharide (LPS) in BALB/c, SJL/J, and C3H mice



The effects of age on the immune response to type III pneumococcal polysaccharide (SIII) and bacterial lipopolysaccharide (LPS) in BALB/c, SJL/J, and C3H mice



Journal of Immunology 116(2): 469-474



Type III pneumococcal polysaccharide (SIII) and bacterial lipopolysaccharide (LPS) were used to evaluate B cell and T cell regulatory functions in BALB/c, SJL/J, and C3H mice of various ages. It was found that the BALB/c and C3H mice could mount high level plaque-forming cell (PFC) responses to SIII at various ages through 110 weeks whereas the levels of the SJL/J PFC responses had begun to decline by the age of 42 weeks through the age of 80 weeks. BALB/c mice were also capable of producing strong PFC responses to LPS at various ages through 110 weeks whereas the comparable SJL/J PFC responses to LPS had declined by 80 weeks of age. By using anti-lymphocyte serum (ALS) and low-dose paralysis to SIII, it was shown that suppressor T cell activity was apparently greater in young BALB/c mice than in older BALB/c mice. It was also found that paralysis to SIII in BALB/c mice was easier to achieve at an early age. SJL/J mice were found to have the necessary B cell activity to respond to SIII through 80 weeks of age and the PFC responses could be greatly enhanced by ALS. Implications of the roles of regulatory T cells in aging are discussed.

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Accession: 038988790

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PMID: 2635



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