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Memory T cells are selectively enriched in lymph nodes of selectin ligand deficient mice (44.14)

Authors: John Harp; Michael Gilchrist; Thandi Onami;

Memory T cells are selectively enriched in lymph nodes of selectin ligand deficient mice (44.14)

Abstract

Abstract Selectin mediated tethering is one of the earliest steps in T cell entry to lymph nodes (LNs). Selectin binding is dependent on the synthesis of the sialyl Lewis X (sLex) structure, which requires the activity of several glycosyltransferases, including fucosyltransferases -IV and -VII. Mice deficient in expression of both enzymes (FtDKO) reveal profound impairment in T cell trafficking to LNs. We show that T cells isolated from FtDKO LNs were predominantly “memory/effector” (CD44Hi) cells. We analyzed the generation of effector and memory CD8 T cells in FtDKO mice following infection with LCMV. At day 8, the proportion of Ag-specific cells was similar in LNs of FtDKO mice compared to WT. In contrast, at day 60 p.i., we observed ~5-fold increase in the proportion of Ag-specific memory CD8 T cells in LNs of FtDKO. We then examined whether Ag-specific memory CD8 T cells were able to selectively enter LNs of FtDKO recipient mice. Memory CD8 T cells were profoundly impaired in entry to the LNs of FtDKO mice. Additionally, while we measured no differences in exit rate of naïve and memory CD8 T cells out of the LNs, we found more naïve T cells entered the LNs from the blood compared to memory. We hypothesize that an unknown mechanism leads to the selective retention of memory T cells in FtDKO LNs.

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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Average