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Lymphoid differentiation of the hematopoietic stem cell that reconstitutes total erythropoiesis of a genetically anemic W/Wv mouse

T Nakano, N Waki, H Asai and Y Kitamura

Division of Cancer Pathology, Osaka University Medical School, Japan.

We investigated whether the stem cell that reconstitutes total erythropoiesis of a WBB6F1-W/Wv mouse differentiates into lymphoid lineage. The electrophoretic pattern of hemoglobin was used as a marker of the reconstitution; 3-phosphoglycerate kinase (PGK), an X chromosome- linked enzyme was used as a tool for estimating clonality. We injected 10(5) bone marrow cells of 5-FU treated C57BL/6-Pgk-1b/Pgk-1a female mice, in which each stem cell had either A-type PGK or B-type PGK due to random inactivation of one of two X chromosomes, into genetically anemic (WB x C57BL/6)F1-W/Wv (hereafter WBB6F1-W/Wv) mice that contained only B-type PGK. The recipient WBB6F1-W/Wv mice, in which erythropoiesis was reconstituted with donor cells for a long term, were killed and the PGK patterns of bone marrows, thymus, lymph nodes, and Peyer's patches were examined. A considerable amount of A-type PGK was detected in the lymphoid organs of the WBB6F1-W/Wv mice in which erythrocytes showed only A-type PGK when killed. In contrast, A-type PGK was scarcely detectable in the lymphoid organs of the WBB6F1-W/Wv mice in which erythrocytes showed only B-type PGK when killed. The present results suggest that the hematopoietic stem cells estimated by the erythropoiesis reconstituting assay differentiate into lymphoid lineage and that the long-term erythropoiesis reconstitution assay is useful for detecting the true primitive hematopoietic stem cells.

Volume 73, Issue 5, pp. 1175-1179, 04/01/1989
Copyright © 1989 by The American Society of Hematology


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  Copyright © 1989 by American Society of Hematology         Online ISSN: 1528-0020