Differential expression of the Kell blood group and CD10 antigens: two related membrane metallopeptidases during differentiation of K562 cells by phorbol ester and hemin

^a CJF INSERM 96. 05, Activation des Cellules Hématopoietiques, Faculté de Médecine, 06107 Nice Cedex 2, France
^b INSERM U76 INTS, 75739 Paris Cedex 15, France

The erythroleukemic cell line K562 can undergo further differentiation in erythroid or megakaryocytic lineage depending on the nature of the stimulus. Phorbol ester (PMA) stimulates megakaryocytic development whereas hemin promotes erythroid differentiation of these cells. We have examined the effect of PMA and hemin on the expression of the Kell blood group and CD10 antigens, two related proteins that belong to a family of membrane-bound neutral metalloendopeptidases. We show here that differentiation of K562 cells by PMA in the megakaryocytic lineage results in abolishment of Kell mRNA accumulation and protein expression and, in parallel, the induction of CD10 mRNA accumulation, protein expression, and enzymatic activity. Conversely, differentiation of these cells by hemin in the erythroid lineage is accompanied by an up-regulation of Kell mRNA and protein expression, with no changes in CD10 mRNA and protein expression. Thus, CD10 and Kell can be regarded as specific markers of the differentiation of K562 cells in the megakaryocytic and erythroid lineages, respectively.—Belhacène, N., Maulon, L., Guérin, S., Ricci, J. E., Mari, B., Colin, Y., Cartron, J. P., Auberger, P. Differential expression of the Kell blood group and CD10 antigens: two related membrane metallopeptidases during differentiation of K562 cells by phorbol ester and hemin. FASEB J. 12, 531–539 (1998)

Key Words: protein kinase C • CD10 activity • Kell • cell proliferation • K562 differentiation • PMA • cells • hemin

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