Publikationsdatum:
1979-06-15
Beschreibung:
Norepinephrine reversibly antagonizes three calcium-dependent potentials recorded from rat postganglionic neurons. Norepinephrine inhibits the development of a shoulder on the aciton potential, the magnitude of the hyperpolarizing afterpotential, and the rate of rise and amplitude of the calcium spike. The action of norepinephrine is antagonized by the alpha-adrenergic antagonist phentolamine, but not by MJ 1999, a beta-adrenergic antagonist. These results suggest that activation of an alpha-adrenergic receptor may antagonize a voltage-sensitive calcium current.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Horn, J P -- McAfee, D A -- New York, N.Y. -- Science. 1979 Jun 15;204(4398):1233-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/221979" target="_blank"〉PubMed〈/a〉
Schlagwort(e):
Animals
;
Calcium/antagonists & inhibitors/*physiology
;
Dopamine/pharmacology
;
Electric Conductivity
;
Ganglia, Autonomic/*drug effects
;
In Vitro Techniques
;
Ion Channels/*drug effects
;
Isoproterenol/pharmacology
;
Membrane Potentials/*drug effects
;
Neurons/drug effects
;
Norepinephrine/*pharmacology
;
Rats
;
Receptors, Adrenergic, alpha/drug effects
Print ISSN:
0036-8075
Digitale ISSN:
1095-9203
Thema:
Biologie
,
Chemie und Pharmazie
,
Informatik
,
Medizin
,
Allgemeine Naturwissenschaft
,
Physik
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