These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


PUBMED FOR HANDHELDS

Search MEDLINE/PubMed


  • Title: Phenylarsine oxide inhibits tyrosine phosphorylation of phospholipase C gamma 2 in human platelets and phospholipase C gamma 1 in NIH-3T3 fibroblasts.
    Author: Yanaga F, Asselin J, Schieven GL, Watson SP.
    Journal: FEBS Lett; 1995 Jul 17; 368(2):377-80. PubMed ID: 7628642.
    Abstract:
    The sulphydryl reagent phenylarsine oxide (PAO) (1 microM) inhibited completely formation of inositol phosphates in human platelets induced by collagen or by cross-linking of the platelet low affinity Fc receptor, F c gamma RIIA, but did not alter the response to the G protein receptor agonist thrombin. PAO also inhibited completely tyrosine phosphorylation of PLC gamma 2 in collagen and Fc gamma RIIA-stimulated cells, although tyrosine phosphorylation of other proteins including the tyrosine kinase syk was relatively unaffected. PAO (1 microM) also inhibited completely tyrosine phosphorylation of PLC gamma 1 induced by platelet derived growth factor (PDGF) in NIH-3T3 fibroblasts but only partially reduced phosphorylation of the PDGF receptor. These results provide further evidence that collagen and Fc gamma RIIA cross-linking activate platelets through a pathway distinct from that used by thrombin and suggest that PAO may be a selective inhibitor of PLC gamma relative to PLC beta isozymes.
    [Abstract] [Full Text] [Related] [New Search]