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Characterization of...
Characterization of phospholipase D activation by muscarinic receptors in human neuroblastoma SH-SY5Y cells
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Boyano-Adanez, M C (författare)
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Lundqvist, C (författare)
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- Larsson, Christer (författare)
- Lund University,Lunds universitet,Institutionen för translationell medicin,Medicinska fakulteten,Department of Translational Medicine,Faculty of Medicine
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Gustavsson, L (författare)
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(creator_code:org_t)
- 1997
- 1997
- Engelska.
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Ingår i: Neuropharmacology. - 1873-7064. ; 36:3, s. 295-304
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The cholinergic regulation of phospholipase D activity was studied in SH-SY5Y human neuroblastoma cells with phosphatidylethanol formation as a specific marker for the enzyme activity. The muscarinic antagonists, hexahydrosiladifenidol and pirenzepine, inhibited carbachol-induced phosphatidylethanol formation in a concentration-dependent manner and the inhibitory constants indicated that muscarinic M1 receptors are responsible for the major part of the phospholipase D activation. The mechanism of receptor-mediated phospholipase D activation varies between different cell types and receptors. In SH-SY5Y cells, the carbachol-induced phospholipase D activity was inhibited by protein kinase C inhibitors. Since both phospholipases D and C are activated by muscarinic stimulation in SH-SY5Y cells, most of the phospholipase D activation is probably secondary to the protein kinase C activation that follows phospholipase C-mediated increase in diacylglycerols. Other kinases may be involved in the regulation since also a tyrosine kinase inhibitor decreased the phosphatidylethanol formation. Stimulation of G-protein(s) and increase in the intracellular Ca2+ concentration activated phospholipase D and may be additional mechanisms for the muscarinic regulation of phospholipase D in SH-SY5Y cells. Propranolol, an inhibitor of phosphatidic acid phosphohydrolase, increased the carbachol-induced formation of phosphatidic acid at the expense of 1,2-diacylglycerol. This indicates that phospholipase D contributes to the formation of 1,2-diacylglycerol after carbachol stimulation in SH-SY5Y cells.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Farmakologi och toxikologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Pharmacology and Toxicology (hsv//eng)
Nyckelord
- G-protein
- acetylcholine
- muscarinic receptor
- phosphatidylethanol
- phospholipase D
- protein kinases
- signal transduction
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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