Cryoactivation fails to augment plasma renin activity in the cat.
1. Active and cryoactivated renin (plasma renin) activity after incubation at -5 degrees C for 4 days, were measured in cat plasma sampled before and during the following procedures: suprarenal aortic stenosis, electrical stimulation of the pons and mild hypotensive haemorrhage. 2. Under all experimental conditions the values of plasma renin activity for both the activated and non-activated samples were similar. 3. The absence of a cryoactivatable aliquot of renin suggests that in cat plasma the inactive form of the enzyme either is actually absent or has a liability to the action of cold different than in other animal species.
D000818:Animals; D001011:Aorta / Q000502:physiology; D001794:Blood Pressure; D002415:Cats; D003080:Cold Temperature; D004558:Electric Stimulation; D004789:Enzyme Activation; D005260:Female; D006470:Hemorrhage / Q000503:physiopathology; D007668:Kidney / Q000378:metabolism; D008297:Male; D011149:Pons / Q000502:physiology; D012079:Renal Circulation; D012083:Renin / Q000097:blood*
D012083:Renin