Abstract:
:In order to better understand the mechanism by which changes in the fatty acid composition of cellular lipids occur in leukemia cell lines induced to differentiate, the activity of the first enzyme of fatty acid biosynthesis, acetyl-CoA carboxylase (EC 6.4.1.2) was measured in HL-60 promyelocytic leukemia cells before, during and after treatment with compounds that induce these cells to mature to neutrophillike cells. After 24 h of exposure to dimethylsulfoxide, retinoic acid, or butyric acid, no morphological or biochemical (nitroblue tetrazolium reduction) evidence of differentiation occurred, but acetyl-CoA carboxylase activity decreased 44, 44.5, and 49% respectively, compared to untreated cells. After 7 days of culture in the presence of these agents, 79, 83, and 72% of cells acquired the ability to reduce nitroblue tetrazolium (versus 15% of control cells) and enzyme activity decreased 92.7, 99.7, and 98%, compared to control cultures, with the three compounds respectively. Thus, some of the reported changes in fatty acid composition of leukemia cells with differentiation may arise, in part, from the depression of the de novo fatty acid biosynthetic pathway and the loss of acetyl-CoA carboxylase activity may be a useful marker for neutrophilic differentiation in HL-60 cells.
journal_name
J Cell Biochemjournal_title
Journal of cellular biochemistryauthors
Fischkoff SA,Papuchis GC,Nickols WAdoi
10.1002/jcb.240260203subject
Has Abstractpub_date
1984-01-01 00:00:00pages
75-81issue
2eissn
0730-2312issn
1097-4644journal_volume
26pub_type
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