Influence of dietary protein on glomerular angiotensin II-receptor binding in normotensive and spontaneously hypertensive rats.
1. The binding of angiotensin II to glomerular receptors was studied in spontaneously hypertensive and normotensive Wistar-Kyoto rats in response to 7, 16 and 32% isocaloric, isonatraemic protein diets. 2. Increased dietary protein elevated the systemic angiotensin II levels of both spontaneously hypertensive and Wistar-Kyoto rats [F0.05(2,26) = 4.758, P less than 0.05; n = 36], and this was not associated with changes in either systemic blood pressure or cortical renin activity. 3. Furthermore, no significant changes in the affinity or density of angiotensin II receptors were associated with changes of dietary protein intake in either strain. 4. These results indicate a dissociation between the system renin-angiotensin system and the tissue renin-angiotensin system in response to protein intake.
Vaughan
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DL
Renal Research Laboratory, School of Postgraduate Medicine and Biological Sciences, University of Keele, Staffordshire, U.K.
Russell
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GI
D000804:Angiotensin II / Q000097:blood / Q000378:metabolism*; D000818:Animals; D004044:Dietary Proteins / Q000494:pharmacology*; D005260:Female; D006973:Hypertension / Q000378:metabolism*; D007672:Kidney Cortex / Q000737:chemistry; D007678:Kidney Glomerulus / Q000378:metabolism*; D011485:Protein Binding / Q000187:drug effects; D011869:Radioligand Assay; D051381:Rats; D011918:Rats, Inbred SHR / Q000378:metabolism*; D011921:Rats, Inbred WKY / Q000378:metabolism*; D011945:Receptors, Angiotensin / Q000378:metabolism*; D012083:Renin / Q000032:analysis; D014882:Water-Electrolyte Balance / Q000187:drug effects
D004044:Dietary Proteins; D011945:Receptors, Angiotensin; D000804:Angiotensin II; D012083:Renin