Evaluation of phospholipase C and D activity in stimulated human neutrophils using a phosphono analog of choline phosphoglyceride.

Published

Journal Article

A phosphono analog of choline phosphoglyceride was used to examine the relative contributions of phospholipase C and D in the generation of diglycerides in fMLP- and A23187-stimulated human neutrophils. The phosphono analog, 1-O-[3H]alkyl-2-lyso-sn-glycero-3-phosphonocholine, contains a carbon-phosphorus bond adjacent to the base moiety and is resistant to phospholipase D hydrolysis, while remaining susceptible to phospholipase C hydrolysis. fMLP stimulated the production of [3H]phosphatidic acid and subsequently [3H]diglyceride from cells containing 1-O-[3H]alkyl-2-acyl-sn-glycero-3-phosphocholine, but not from cells prelabeled with the phosphono analog. Treatment with A23187 also resulted in the formation of these products from cells containing 1-O-[3H]alkyl-2-acyl-sn-glycero-3-phosphocholine. Additionally, A23187 stimulated the conversion of the phosphono analog to phosphodiester-containing choline phosphoglyceride which then resulted in the generation of [3H]phosphatidic acid and subsequently [3H]diglyceride. This study demonstrates the use of a phosphono analog in assessing phospholipase C and D activity in cells and provides evidence that in fMLP- and A23187-stimulated human neutrophils, diglyceride is generated indirectly from choline phosphoglycerides by the combined activities of phospholipase D and phosphatidate phosphohydrolase.

Full Text

Duke Authors

Cited Authors

  • Strum, JC; Nixon, AB; Daniel, LW; Wykle, RL

Published Date

  • July 21, 1993

Published In

Volume / Issue

  • 1169 / 1

Start / End Page

  • 25 - 29

PubMed ID

  • 8334146

Pubmed Central ID

  • 8334146

International Standard Serial Number (ISSN)

  • 0006-3002

Digital Object Identifier (DOI)

  • 10.1016/0005-2760(93)90077-m

Language

  • eng

Conference Location

  • Netherlands