Different B cell populations mediate early and late memory during an endogenous immune response.

Different B cell populations mediate early and late memory during an endogenous immune response.
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DOI:
10.1126/science.1201730
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发表时间:
2011-03-04
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Jenkins MK
Jenkins MK
中科院分区:
其他
文献类型:
--
作者:
Pape KA;Taylor JJ;Maul RW;Gearhart PJ;Jenkins MK

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Memory B cells formed in response to microbial antigens provide immunity to later infections; however, the inability to detect rare endogenous antigen-specific cells limits current understanding of this process. Using an antigen-based technique to enrich these cells, we found that immunization with a model protein generated B memory cells that expressed isotype-switched immunoglobulins (swIg) or retained IgM. The more numerous IgM+ cells were longer lived than the swIg+ cells. However, swIg+ memory cells dominated the secondary response due to the capacity to become activated in the presence of neutralizing serum Ig. Thus, we propose that memory relies on swIg+ cells until they disappear and serum Ig falls to a low level, in which case memory resides with durable IgM+ reserves.
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