How memory is retained is an immunological mystery. One possibility, argued here by Fons UytdeHaag and colleagues, is that memory is imprinted in the somatically-mutated Ig expressed by certain CD5+ B cells. The theory proposes that the Ig expressed by this self-renewing population acts as surrogate antigen, selecting and stimulating emerging antigen-specific lymphocytes.

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doi.org/10.1016/0167-5699(91)90016-M, hdl.handle.net/1765/3430
Immunology Today
Erasmus MC: University Medical Center Rotterdam

UytdeHaag, F., van der Heijden, R., & Osterhaus, A. (1991). Maintenance of immunological memory: A role for CD5+ B cells?. Immunology Today, 12(12), 439–442. doi:10.1016/0167-5699(91)90016-M