Journal of Experimental Medicine, Vol 166, 391-403, Copyright © 1987 by Rockefeller University Press

ARTICLES

Regulated progression of B lymphocyte differentiation from cultured fetal liver

KA Denis, K Dorshkind and ON Witte

Lymphoid fetal liver cultures (LFLC) are long-term, nontransformed cultures of early B lymphoid lineage cells which appear developmentally blocked at the pre-B stage in vitro. When injected into severe combined immunodeficient (SCID) mice, cells from LFLC could reconstitute splenic B lymphocytes and serum IgM. T lymphocyte reconstitution was not observed and serum IgG levels were very low. IgG3 was the predominant gamma subisotype in the serum of the LFLC-reconstituted mice, indicating impaired class switching in these B lymphocytes. When thymocytes were coinjected with LFLC, the B lymphocytes were able to class switch fully and respond to T-dependent antigens. These serological responses were heterogeneous. This experimental system allows separation of three B lymphocyte developmental stages: early differentiation in vitro, progression to IgM secretion in vivo, and late differentiation dependent upon mature T lymphocytes in vivo. The unique advantage of this system is the ability to regulate the B lymphocyte developmental pathway in a defined, stepwise manner.
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This article has been cited by other articles:

• McKenna, S. D., Chen, F., Lai, L., Goldschneider, I. (1998). Identification of an IL-7-Associated Pre-Pro-B Cell Growth-Stimulating Factor (PPBSF). I. Production of the Non-IL-7 Component by Bone Marrow Stromal Cells from IL-7 Gene-Deleted Mice. J. Immunol. 160: 2272-2279 [Abstract] [Full Text]  

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