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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Some central mechanisms of thirst in the dog.

Measurements of water intake were made on a population of trained conscious dogs of both sexes prepared with chronic third ventricle cannulae. 2. Injection of 100 ng angiotensin II into the third ventricle lead to a prompt stimulation of drinking, the mean water intake over a 5 min period being 503 +/- 89 ml. (n=6) compared with controls. This dipsogenic effect of angiotensin II was abolished by prior central administration of 10 mug saralasin acetate or 100 ng atropine. 3. Injection of 1 mug carbachol into the third ventricle produced a small, variable increase in drinking. 4. Injection of 0-2 ml. 5% NaCl into the third ventricle stimulated drinking, a response that was not affected by prior administration of 10 mug saralasin acetate or 100 ng atropine. 5. Following a 24 hr period of water deprivation there was an increase in plasma osmolality and plasma-renin activity. The drinking following this period of water deprivation was not affected by prior control administration of either 10 mug saralasin acetate or 100 ng atropine. 6. In two acute dogs, intracarotid infusion of 125I angiotensin II was not followed by significant appearance of radioactivity in the third ventricle or cisterna magna c.s.f. 7. The relevance of these results to the control of water intake is discussed.[1]

References

  1. Some central mechanisms of thirst in the dog. Ramsay, D.J., Reid, I.A. J. Physiol. (Lond.) (1975) [Pubmed]
 
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