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M Harada, S Nakao, K Kondo, K Odaka, M Ueda, S Shiobara, K Matsue, T Mori and T Matsuda
Autologous mixed lymphocyte culture (AMLR) is an immunologic response with
memory and specificity and plays a role in immune regulation. Effects of T
cells activated by AMLR were studied in the regulation of in vitro
erythropoiesis. AMLR-activated T cells were cocultured with autologous
non-T, nonphagocytic peripheral blood mononuclear cells for assaying
erythroid progenitor cells (BFU-E). T cells activated for 3 days in AMLR
showed significant enhancement of in vitro colony growth by BFU-E. In
contrast, activated T cells from day 7 AMLR caused significant suppression
of BFU-E growth. Both enhancing and suppressing activities of
AMLR-activated T cells were mediated by an la-positive and radiosensitive
population within the OKT4+ subset. These observations suggest that
AMLR-activated T cells may play a role in the immune-mediated regulation of
in vitro erythropoiesis. It is also suggested that heterogeneous T-cell
subsets may exert regulatory functions in the regulation of in vitro
hematopoiesis.
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| Copyright © 1986 by American Society of Hematology Online ISSN: 1528-0020 | |||||||||