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2004

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University of Massachusetts Medical School

Aging

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Full-Text Articles in Life Sciences

Expression Of Rag2 And V(D)J Recombinase Activity Are Reduced In Aged Mice As A Result Of Changes In The Bone Marrow Microenvironment: A Dissertation, Joseph E. Labrie Iii Feb 2004

Expression Of Rag2 And V(D)J Recombinase Activity Are Reduced In Aged Mice As A Result Of Changes In The Bone Marrow Microenvironment: A Dissertation, Joseph E. Labrie Iii

GSBS Dissertations and Theses

Both humans and mice display an age-related decline in immunity. Reduced generation of mature B cells may be a contributing factor due to reduced entry of mature B cells with novel B cell receptors and specificity for pathogens into the mature B cell pool. In aged mice the numbers of B cell precursors within the bone marrow are diminished; there is a severe reduction in numbers of pre-B cells and an increase in numbers of re-circulated mature B cells. Other defects in developing B cells include reduced expression of rag1 and rag2 when measured in total bone marrow precursor populations ...