Publication Date:
1978-01-20
Description:
Dispersed pinealocytes have been used to study the role of adenosine 3',5'-monophosphate (cyclic AMP) in the "turnoff" of N-acetyltransferace activity. Activity was first stimulated 100-fold by treating cells with 1-norepinephrine. 1-Propranolol acted stereospecifically to rapidly reverse this, resulting in a 70 percent loss of enzyme activity within 15 minutes. An even more rapid 1-propranolol-induced decreased in cyclic AMP also occurred. This together with the observation that the inhibitory effect of 1-propranolol on N-acetyltransferase was blocked by dibutyryl cyclic AMP and phosphodiesterase inhibitors indicate that an abrupt decrease in cyclic AMP may be the signal for the rapid decrease in pineal N-acetyltransferase activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Klein, D C -- Buda, M J -- Kapoor, C L -- Krishna, G -- New York, N.Y. -- Science. 1978 Jan 20;199(4326):309-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/202027" target="_blank"〉PubMed〈/a〉
Keywords:
Acetyltransferases/antagonists & inhibitors/*metabolism
;
Animals
;
Bucladesine/pharmacology
;
Cyclic AMP/*metabolism
;
In Vitro Techniques
;
Phosphodiesterase Inhibitors/pharmacology
;
Pineal Gland/*metabolism
;
Propranolol/antagonists & inhibitors/pharmacology
;
Rats
;
Serotonin
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
