Abstract:
:Previous reports have shown that 12-0-tetradecanoylphorbol-13-acetate can activate phospholipase D in human peripheral blood mononuclear cells as measured by an enzyme-catalyzed transphosphatidylation reaction (phosphatidylethanol formation). In the present study, the mononuclear cells were fractionated by two procedures to identify the responsive cells. Contrary to earlier suggestions, the results indicate that phorbol ester does not stimulate phospholipase D activity in normal lymphocytes. Thus, phosphatidylethanol was not produced by T lymphocytes (isolated by sheep erythrocyte rosette formation) or by a mixture of T and B lymphocytes (isolated by centrifugal elutriation). Under the same conditions, phorbol ester was able to activate phospholipse D in fractions that contained predominately monocytes. Preliminary experiments have further shown that phorbol ester does not induce phospholipase D activity in human T cell leukemic lines (MOLT-3, CEM, JURKAT, PEER) but can do so in some, but not all, B cell lines that have been infected with Epstein-Barr virus.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Kinsky SC,Loader JE,Benedict SHdoi
10.1016/0006-291x(89)92379-6subject
Has Abstractpub_date
1989-07-31 00:00:00pages
788-93issue
2eissn
0006-291Xissn
1090-2104pii
0006-291X(89)92379-6journal_volume
162pub_type
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