Phorbol ester activation of phospholipase D in human monocytes but not peripheral blood lymphocytes.

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.

authors

Kinsky SC,Loader JE,Benedict SH

doi

10.1016/0006-291x(89)92379-6

subject

Has Abstract

pub_date

1989-07-31 00:00:00

pages

788-93

issue

2

eissn

0006-291X

issn

1090-2104

pii

0006-291X(89)92379-6

journal_volume

162

pub_type

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