Distinct Cell Types Control Lymphoid Subset Development by Means of IL-15 and IL-15 Receptor Alpha Expression
Overview
Authors
Affiliations
IL-15 and the IL-15 receptor (IL-15R)alpha chain are essential for normal development of naive CD8 T cells, intestinal intraepithelial lymphocytes (IEL), and natural killer (NK)/NK/T cells. However, whether IL-15R alpha expression by these subsets is necessary for their production and which cell type needs to produce IL-15 to drive development are unknown. We analyzed the requirements for IL-15 and IL-15R alpha expression by bone marrow-derived or parenchymal cells for mediating lymphocyte subset development. Naive CD8 T cell development required IL-15R alpha expression by both bone marrow-derived and parenchymal cells, whereas memory-phenotype CD8 T cells required IL-15R alpha expression only by hematopoietic cells. In contrast and surprisingly, the development of IEL subsets, particularly CD8 alpha alpha Thy1(-)V gamma 5(+) T cell antigen receptor gamma delta and the CD8 alpha alpha Thy1(-) T cell antigen receptor alpha beta IEL populations, depended completely on parenchymal cell expression of IL-15R alpha and IL-15 but not IL-15R beta. In the case of NK and NK/T cell generation and maturation, expression of IL-15 and IL-15R alpha by both parenchymal and hematopoietic cells was important, although the latter played the greatest role. These results demonstrated dichotomous mechanisms by which IL-15 regulated lymphoid development, interacting with distinct cell types depending on the developmental pathway.
Dietary nucleic acids promote oral tolerance through innate sensing pathways in mice.
Yang T, Li T, Xing Y, Cao M, Zhang M, Leng Q Nat Commun. 2024; 15(1):9461.
PMID: 39487135 PMC: 11530426. DOI: 10.1038/s41467-024-53814-0.
Intracellular checkpoints for NK cell cancer immunotherapy.
Huang Y, Tian Z, Bi J Front Med. 2024; 18(5):763-777.
PMID: 39340588 DOI: 10.1007/s11684-024-1090-6.
No time to die: Epigenetic regulation of natural killer cell survival.
Hermans L, OSullivan T Immunol Rev. 2024; 323(1):61-79.
PMID: 38426615 PMC: 11102341. DOI: 10.1111/imr.13314.
Skariah N, James O, Swamy M Discov Immunol. 2024; 3(1):kyae002.
PMID: 38405398 PMC: 10883678. DOI: 10.1093/discim/kyae002.
Destined for the intestine: thymic selection of TCRαβ CD8αα intestinal intraepithelial lymphocytes.
Joannou K, Baldwin T Clin Exp Immunol. 2023; 213(1):67-75.
PMID: 37137518 PMC: 10324546. DOI: 10.1093/cei/uxad049.