Frontline Science: Exhaustion and senescence marker profiles on human T cells in BRGSF-A2 humanized mice resemble those in human samples

Laura Labarthe, Soledad Henriquez, Olivier Lambotte, James P. Di Santo, Roger Le Grand, Françoise Pflumio, Marie Laure Arcangeli, Nicolas Legrand, Christine Bourgeois

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

9 Citations (Scopus)

Résumé

This work sought to confirm the human-like expression of exhaustion and senescence markers in a mouse model with a humanized immune system (HIS): the Balb/c Rag2KO IL2rgcKO SirpαNOD Flk2KO HLA-A2HHD (BRGSF-A2) mouse reconstituted with human CD34+ cord blood cells. With regard to senescence markers, the percentage of CD57+ T cells was higher in the bone marrow (BM) than in the spleen or blood. The same was true for KLRG1+ hCD8+ T cells. With regard to exhaustion markers, the percentage of programmed death 1 (PD-1+) T cells was higher in the BM than in the spleen or blood; the same was true for TIGIT+ hCD4+ cells. These tissue-specific differences were related to both higher proportions of memory T cells in BM and intrinsic differences in expression within the memory fraction. In blood samples from HIS mice and healthy human donors (HDs), we found that the percentage of KLRG1+ cells among hCD8+ T cells was lower in HIS compared to HDs. The opposite was true for CD4+ T cells. Unexpectedly, a high frequency of KLRG1+ cells was observed among naive T cells in HIS mice. CD57 expression on T cells was similar in blood samples from HIS mice and HDs. Likewise, PD-1 expression was similar in the two systems, although a relatively low proportion of HIS hCD4+ T cells expressed TIGIT. The BRGSF-A2 HIS mouse's exhaustion and senescence profile was tissue specific and relatively human like; hence, this mouse might be a valuable tool for determining the preclinical efficacy of immunotherapies.

langue originaleAnglais
Pages (de - à)27-42
Nombre de pages16
journalJournal of Leukocyte Biology
Volume107
Numéro de publication1
Les DOIs
étatPublié - 1 janv. 2020
Modification externeOui

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