## 2-[(cyclohexylmethylene)hydrazino]adenosine (MRE-0470 ) is an A 2A -adenosine receptor agonist that is a potent and selective coronary vasodilator. As part of a preclinical program, the pharmacology and toxicology of MRE-0470 have been studied in the rat. In isolated vas deferens, MRE-0470 act
Inhibition of the shake response in rats by adenosine and 2-chloroadenosine
โ Scribed by S. Y. H. Tse; E. T. Wei
- Publisher
- Springer
- Year
- 1986
- Tongue
- English
- Weight
- 470 KB
- Volume
- 90
- Category
- Article
- ISSN
- 0033-3158
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โฆ Synopsis
Shaking movements, similar to those made by a dog when wet, were elicited in rats by a)immersion in ice-water, b) injections of icilin, a chemical that produces sensations of cold, and c) naloxone-precipitated morphine withdrawal. Adenosine and 2-chloroadenosine produced dose-dependent inhibition of shaking to ice-water and icilin. The 2-chloroadenosine effect was mediated centrally because the ICV dose required to produce inhibition was not effective when given IP. Caffeine antagonized the inhibitory effects of adenosine and 2-chloroadenosine. 2-Chloroadenosine suppressed morphine-abstinence shaking as well as the body weight loss that normally accompanies withdrawal.
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The action of acetylcholine and adenosine triphosphate (ATP) on cytoplasmic Ca2+ concentration ([Ca2+Ji) was studied in the otocyst epithelium of embryonic day 3 chicks with Ca2+-sensitive fluorescence measurements. Increases in [Ca2+li were evoked by the bath application of acetylcholine (1 pM or h