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  • Title: Effect of AML serum on normal human myeloid differentiation and hexamethylene bisacetamide-induced granulocytic differentiation of the human HL-60 promyelocytic leukaemic cell line.
    Author: Hassan HT, Rees JK.
    Journal: Folia Haematol Int Mag Klin Morphol Blutforsch; 1990; 117(1):151-9. PubMed ID: 1695170.
    Abstract:
    The effect of serum from 32 AML patients on the normal human myeloid differentiation and the hexamethylene-bisacetamide induced granulocytic differentiation of HL-60 promyelocytic leukaemic cell line was studied. Nonadherent normal mononuclear marrow cells were cultured in vitro at a concentration of 5 x 10(5) cells/ml for 6 days with each of the 32 AML sera. Ten normal human AB sera were used as control. The results showed an inhibitory activity on both morphological and functional differentiation of normal human myeloid immature marrow cells by 29 out of the 32 AML sera tested. These 29 AML sera were added to cultures of HL-60 (2.5 x 10(5)/ml) leukaemia cell line which incorporated 2 mM hexamethylene-bisacetamide for 6 days. The results showed no significant inhibition of hexamethylene-bisacetamide induced granulocytic differentiation by any of the 29 AML sera. The efficacy of hexamethylene-bisacetamide in inducing differentiation in the presence of inhibitory factors suggests a possible role in the treatment of AML patients.
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