Journal
JOURNAL OF NEUROSCIENCE
Volume 36, Issue 4, Pages 1386-1400Publisher
SOC NEUROSCIENCE
DOI: 10.1523/JNEUROSCI.3535-15.2016
Keywords
excitability; M-current; phosphoinositide metabolism; PI(4,5)P-2; superior cervical ganglion neurons
Categories
Funding
- National Institute of Neurological Disorders and Stroke of the NIH [R37NS008174]
- Wayne E. Crill Endowed Professorship
- Alexander von Humboldt-Foundation fellowship
- NIH from the National Institute for General Medical Sciences [P41 GM103313]
Ask authors/readers for more resources
In neurons, loss of plasma membrane phosphatidylinositol 4,5-bisphosphate [PI(4,5)P-2] leads to a decrease in exocytosis and changes in electrical excitability. Restoration of PI(4,5)P-2 levels after phospholipase C activation is therefore essential for a return to basal neuronal activity. However, the dynamics of phosphoinositide metabolism have not been analyzed in neurons. We measured dynamic changes of PI(4,5)P-2, phosphatidylinositol 4-phosphate, diacylglycerol, inositol 1,4,5-trisphosphate, and Ca2+ upon muscarinic stimulation in sympathetic neurons from adult male Sprague-Dawley rats with electrophysiological and optical approaches. We used this kinetic information to develop a quantitative description of neuronal phosphoinositide metabolism. The measurements and analysis show and explain faster synthesis of PI(4,5)P-2 in sympathetic neurons than in electrically nonexcitable tsA201 cells. They can be used to understand dynamic effects of receptor-mediated phospholipase C activation on excitability and other PI(4,5)P-2-dependent processes in neurons.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available