Murine basophil-mast differentiation: toward optimal conditions for selective growth and maturation of basophil-mast or allied cells

Journal of Cellular Physiology
M LanotteD Guy-Grand

Abstract

Recent investigations revealed that basophil-mast cells were related to the hemopoietic system. Strikingly, murine bone marrow showed a singular paucity in cells with basophil-mast features; moreover in clonogenic assays (methylcellulose, agarose) bone marrow was found to be manifestly poor in basophil-mast progenitor cells. Our work brought to light several new facts concerning the culture and differentiation of this cell type: 1 degree pure and mixed mast clones can be derived in large numbers from bone marrow, provided progenitors are cultured in collagen matrix. Up to 1,382 hemopoietic clones were analysed in situ after staining: 30% contained mast cells (34 per 10(5) cells), thus the basophil-mast lineage was one of the most frequent. We concluded that other cloning media were noticeably nonoptimal for the growth and/or maturation of mast cells. We suggested that collagen and the molecular edifices derived from it, both found in variable amounts in the natural mast environments, should play essential roles in mast phenotype expression. 2 Degrees cholera toxin (CT) selectively eradicated nonmast progenies: mast progenitors and mast progenies were resistant. In this way, pure and rapidly expanding mast cell clones were obtai...Continue Reading

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