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. 1992 Oct;107(2):610–615. doi: 10.1111/j.1476-5381.1992.tb12791.x

In vitro denervation of the rat vas deferens through hypothermic storage.

N H Jurkiewicz 1, A G Garcia 1, A Jurkiewicz 1
PMCID: PMC1907862  PMID: 1422602

Abstract

1. The rat vas deferens was excised, stored at 4-6 degrees C and tested after 24, 48, 72 or 96 h for its contractile activity and for the presence of innervation. 2. The maximal contractile capacity of the vas, tested through cumulative concentrations of barium chloride (3 x 10(-2) M) was progressively reduced from about 110 mm to about 63 mm after 72 h, without further decay after 96 h. Spontaneous rhythmic contractions were practically absent. 3. A loss of endogenous pools of catecholamines was indicated by four parameters: (a) a decline of about 80% after 24 h and of more than 95% after 48 h of the contractile effect of the indirect sympathomimetic agonist tyramine; (b) a fall of about 20%, 50% and 85% on the concentration of noradrenaline, respectively after 24, 48 and 72 h; (c) a fall of about 25% and 90% after respectively 24 and 48 h, of the activity of dopamine-beta-hydroxylase (DBH); (d) a decline of noradrenaline-induced histofluorescence on cross sections of the vas. 4. A loss of neuronal uptake capacity was indicated by: (a) a progressive variation of the apparent affinity for adrenaline, expressed as pD2 values, that increased by about 1.5 log units (corresponding to a 30 fold potentiation) after 72 h, and (b) a reduction of the ability of cocaine to potentiate the contractile effects of adrenaline. 5. The pD2 values for barium chloride, 5-hydroxytryptamine (5-HT) and histamine were not significantly changed, while the corresponding value for acetylcholine was slightly but significantly reduced by about 0.8 log units.(ABSTRACT TRUNCATED AT 250 WORDS)

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Selected References

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