| Literature DB >> 4333989 |
N B Thoa, G F Wooten, J Axelrod, I J Kopin.
Abstract
Stimulation of the hypogastric nerve to the guinea pig vas deferens in the presence of phenoxybenzamine produced an enhanced release of both dopamine-beta-hydroxylase (EC 1.14.2.1) and norepinephrine. Addition of colchicine, vinblastine, or cytochalasin-B to the incubation medium caused an almost complete inhibition of release of both the amine and the enzyme. Colchicine and cytochalasin-B produced a blocking effect but did not, however, modify the ratio of dopamine-beta-hydroxylase to norepinephrine recovered in the bath fluid. The findings indicate that norepinephrine and dopamine-beta-hydroxylase are released from sympathetic nerve terminals by exocytosis and that this process is dependent upon the integrity of both microtubules and microfilaments.Entities:
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Year: 1972 PMID: 4333989 PMCID: PMC426493 DOI: 10.1073/pnas.69.2.520
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN: 0027-8424 Impact factor: 11.205