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CD57+ Memory T Cells Proliferate In Vivo.

Abstract：

:A central paradigm in the field of lymphocyte biology asserts that replicatively senescent memory T cells express the carbohydrate epitope CD57. These cells nonetheless accumulate with age and expand numerically in response to persistent antigenic stimulation. Here, we use in vivo deuterium labeling and ex vivo analyses of telomere length, telomerase activity, and intracellular expression of the cell-cycle marker Ki67 to distinguish between two non-exclusive scenarios: (1) CD57+ memory T cells do not proliferate and instead arise via phenotypic transition from the CD57- memory T cell pool; and/or (2) CD57+ memory T cells self-renew via intracompartmental proliferation. Our results provide compelling evidence in favor of the latter scenario and further suggest in conjunction with mathematical modeling that self-renewal is by far the most abundant source of newly generated CD57+ memory T cells. Immunological memory therefore appears to be intrinsically sustainable among highly differentiated subsets of T cells that express CD57.

journal_name

Cell Rep

journal_title

Cell reports

authors

Ahmed R,Miners KL,Lahoz-Beneytez J,Jones RE,Roger L,Baboonian C,Zhang Y,Wang ECY,Hellerstein MK,McCune JM,Baird DM,Price DA,Macallan DC,Asquith B,Ladell K

doi

10.1016/j.celrep.2020.108501

subject

Has Abstract

pub_date

2020-12-15 00:00:00

pages

108501

issue

11

issn

2211-1247

pii

S2211-1247(20)31490-X

journal_volume

33

pub_type

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