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1,25-Dihydroxyvitamin D3 induces a myelomonocytic phenotype with enhanced effector cell function in the HL-60 promyelocytic leukemia cell line.

Abstract：

:Human promyelocytic leukemia (HL-60) cells were induced by 1,25-dihydroxyvitamin D3 (calcitriol) to differentiate and examined using a panel of monoclonal antibodies (MoAbs) and functional assays. Although morphologically and histochemically these cells appeared to be of the monocyte-macrophage phenotype, there was a decline in Fc receptors for IgGl and no induction of class II HLA antigens. There was, however, dramatic induction of the antigen detected by the myeloid-specific MoAb AML-2-23. These data suggest that the phenotypic changes induced by calcitriol in HL-60 cells are consistent with myelomonocytic differentiation in that the resultant cells possess characteristics of both monocytes (morphology, non-specific esterase staining, high levels of AML-2-23 reactivity) and granulocytes (PMN 29 binding, decreased Fc receptors for IgGl, absence of class II HLA antigens). Perhaps more important, the ability of calcitriol-treated cells to perform antibody-dependent cellular cytotoxicity and phagocytosis was markedly augmented. Lysis of antibody-coated erythrocytes by HL-60 cells increased from 5% in controls to 30-35% with calcitriol treatment for 4 days. This enhanced effector cell function was seen despite a decline in Fc receptors measured by cytofluorography. These data suggest that calcitriol may be involved in both differential and functional activation of myeloid cells.

journal_name

Mol Immunol

journal_title

Molecular immunology

authors

Rigby WF,Shen L,Ball ED,Fanger MW

doi

10.1016/0161-5890(85)90180-4

subject

Has Abstract

pub_date

1985-05-01 00:00:00

pages

567-72

issue

5

eissn

0161-5890

issn

1872-9142

journal_volume

22

pub_type

杂志文章

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