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The Journal of Immunology, Vol 138, Issue 2 544-549, Copyright © 1987 by American Association of Immunologists

ARTICLES

Changing processes from bone marrow-derived cultured mast cells to connective tissue-type mast cells in the peritoneal cavity of mast cell- deficient w/wv mice: association of proliferation arrest and differentiation

T Nakano, Y Kanakura, H Asai and Y Kitamura

Connective tissue-type mast cells (CTMC) and mast cells grown in vitro exhibit many differences in morphology, biochemistry, and function. When cultured mast cells of WBB6F1-+/+ mouse origin were injected into the peritoneal cavity of genetically mast cell-deficient WBB6F1-W/Wv mice, however, the cultured mast cells acquired characteristics similar to CTMC. In this study, we analyzed the changing process. When the density of the cultured mast cells was measured by Percoll density gradient centrifugation, the proportion of dense mast cells increased after injection into the peritoneal cavity. Because the increase in proportion of dense mast cells paralleled the increase in proportion of heparin-containing mast cells, both parameters may be used as an index for differentiation activity of cultured mast cells into CTMC. When proliferation activity of mast cells was estimated by the incorporation of bromodeoxyuridine, the proliferation activity decreased after the i.p. transfer. Moreover, when cultured mast cells were recovered 10 wk after the i.p. transfer, the mast cells almost lost proliferation activity in the same culture condition that had been used for establishment of cultured mast cells from the bone marrow of WBB6F1-+/+ mice. These results demonstrate that the proliferation arrest and the acquisition of CTMC-like characters are associated after i.p. transfer of cultured mast cells.


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