{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Worthington AK"],"funding":["Tobacco-Related Disease Research Program","American Heart Association","University of California, Santa Cruz","Howard Hughes Medical Institute","NIDDK NIH HHS","National Institute of Diabetes and Digestive and Kidney Diseases","American Asthma Foundation","NHLBI NIH HHS","National Heart, Lung, and Blood Institute","California Institute for Regenerative Medicine","National Institutes of Health"],"pagination":["dev200139"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC8917444"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["149(8)"],"pubmed_abstract":["Tissue-resident lymphoid cells (TLCs) span the spectrum of innate-to-adaptive immune function. Unlike traditional, circulating lymphocytes that are continuously generated from hematopoietic stem cells (HSCs), many TLCs are of fetal origin and poorly generated from adult HSCs. Here, we sought to further understand murine TLC development and the roles of Flk2 and IL7Rα, two cytokine receptors with known function in traditional lymphopoiesis. Using Flk2- and Il7r-Cre lineage tracing, we found that peritoneal B1a cells, splenic marginal zone B (MZB) cells, lung ILC2s and regulatory T cells (Tregs) were highly labeled. Despite high labeling, loss of Flk2 minimally affected the generation of these cells. In contrast, loss of IL7Rα, or combined deletion of Flk2 and IL7Rα, dramatically reduced the number of B1a cells, MZBs, ILC2s and Tregs, both in situ and upon transplantation, indicating an intrinsic and essential role for IL7Rα. Surprisingly, reciprocal transplants of wild-type HSCs showed that an IL7Rα-/- environment selectively impaired reconstitution of TLCs when compared with TLC numbers in situ. Taken together, our data defined Flk2- and IL7Rα-positive TLC differentiation paths, and revealed functional roles of Flk2 and IL7Rα in TLC establishment."],"journal":["Development (Cambridge, England)"],"pubmed_title":["IL7Rα, but not Flk2, is required for hematopoietic stem cell reconstitution of tissue-resident lymphoid cells."],"pmcid":["PMC8917444"],"funding_grant_id":["R01 HL147081","R01 DK100917","R01DK100917","K01 HL130753","F31 HL151199","FA1-00617-1","CL1-00506"],"pubmed_authors":["Hussaini A","Poscablo DM","Cool T","Beaudin AE","Worthington AK","Forsberg EC"],"additional_accession":[]},"is_claimable":false,"name":"IL7Rα, but not Flk2, is required for hematopoietic stem cell reconstitution of tissue-resident lymphoid cells.","description":"Tissue-resident lymphoid cells (TLCs) span the spectrum of innate-to-adaptive immune function. Unlike traditional, circulating lymphocytes that are continuously generated from hematopoietic stem cells (HSCs), many TLCs are of fetal origin and poorly generated from adult HSCs. Here, we sought to further understand murine TLC development and the roles of Flk2 and IL7Rα, two cytokine receptors with known function in traditional lymphopoiesis. Using Flk2- and Il7r-Cre lineage tracing, we found that peritoneal B1a cells, splenic marginal zone B (MZB) cells, lung ILC2s and regulatory T cells (Tregs) were highly labeled. Despite high labeling, loss of Flk2 minimally affected the generation of these cells. In contrast, loss of IL7Rα, or combined deletion of Flk2 and IL7Rα, dramatically reduced the number of B1a cells, MZBs, ILC2s and Tregs, both in situ and upon transplantation, indicating an intrinsic and essential role for IL7Rα. Surprisingly, reciprocal transplants of wild-type HSCs showed that an IL7Rα-/- environment selectively impaired reconstitution of TLCs when compared with TLC numbers in situ. Taken together, our data defined Flk2- and IL7Rα-positive TLC differentiation paths, and revealed functional roles of Flk2 and IL7Rα in TLC establishment.","dates":{"release":"2022-01-01T00:00:00Z","publication":"2022 Apr","modification":"2026-05-10T01:38:08.619Z","creation":"2025-02-19T01:11:48.634Z"},"accession":"S-EPMC8917444","cross_references":{"pubmed":["35072209"],"doi":["10.1242/dev.200139"]}}