Occurrence and functions of the phosphatidylinositol cycle in the myocardium

Jos M.J. Lamers*, Dick H.W. Dekkers, Karel Bezstarosti, Johanna T.A. Meij, Han A.A. van Heugten

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

11 Citations (Scopus)


In the last decade a great deal of attention was awarded to a signal transduction pathway which is utilized primarily by 'Ca2+ mobilizing' signal molecules and which involves the hydrolysis of a quantitatively minor phospholipid, phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2) by a PtdIns-specific phospholipase C (PLC). The evidence for the existence of receptor-mediated GTP binding protein-coupled PLC in myocardium and its possible functions are briefly summarized. The minireview is concentrated on the following aspects: 1) cellular localization and synthesis of polyphospho-PtdIns from PtdIns, 2) desensitization of the α1-adrenergic agonist and endothelin-1 mediated PtdIns responses, 3) oscillatory Ca2+ transients initiated by Ptdlns(4,5)P2 hydrolysis, 4) polyunsaturated fatty acids as constituents of polyphospho-PtdIns and of the protein kinase C activator 1,2-diacylglycerol (DAG), 5) source other than Ptdlns(4,5)P2 contributing to the stimulated DAG, 6) role of the PtdIns pathway in cardiomyocyte growth and gene expression during the hypertrophic response. (Mol Cell Biochem 116: 59-67, 1992)

Original languageEnglish
Pages (from-to)59-67
Number of pages9
JournalMolecular and Cellular Biochemistry
Issue number1-2
Publication statusPublished - Oct 1992
Externally publishedYes


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