Department of Microbiology and Physiological Systems
Cell Biology | Developmental Biology | Immunity
B cells are key components of cellular and humoral immunity and, like all lymphocytes, are thought to originate and renew from hematopoietic stem cells (HSCs). However, our recent single-HSC transfer studies demonstrate that adult bone marrow HSCs do not regenerate B-1a, a subset of tissue B cells required for protection against pneumonia, influenza, and other infections. Since B-1a are regenerated by transfers of fetal liver, the question arises as to whether B-1a derive from fetal, but not adult, HSCs. Here we show that, similar to adult HSCs, fetal HSCs selectively fail to regenerate B-1a. We also show that, in humanized mice, human fetal liver regenerates tissue B cells that are phenotypically similar to murine B-1a, raising the question of whether human HSC transplantation, the mainstay of such models, is sufficient to regenerate human B-1a. Thus, our studies overtly challenge the current paradigm that HSCs give rise to all components of the immune system.
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Citation: Stem Cell Reports. 2016 Jan 12;6(1):137-49. doi: 10.1016/j.stemcr.2015.11.011. Epub 2015 Dec 24. Link to article on publisher's site
Copyright © 2016 The Authors. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
DOI of Published Version
Stem cell reports
Ghosn, Eliver Eid Bou; Waters, Jeffrey; Phillips, Megan; Yamamoto, Ryo; Long, Brian R.; Yang, Yang; Gerstein, Rachel M.; Stoddart, Cheryl A.; Nakauchi, Hiromitsu; and Herzenberg, Leonore A., "Fetal Hematopoietic Stem Cell Transplantation Fails to Fully Regenerate the B-Lymphocyte Compartment" (2016). Open Access Articles. 2767.
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This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.