title: Biological significance of active and inactive renin in man.
abstract: The biological significance of active and inactive renin was investigated by comparison of an in-vitro assay of active, total and inactive plasma renin concentration (PRC), plasma renin activity (PRA) and plasma concentrations of angiotensin I and II with an in-vivo change in mean arterial blood pressure (MAP) produced by antagonism of angiotensin with treatment with saralasin and by blockade of angiotensin-converting enzyme by treatment with captopril. A significant relationship between the changes in MAP during treatment with saralasin and captopril with the pretreatment levels of PRA, active and total PRC and angiotensin II were found; while the pre-existing level of inactive renin was not a predictor for the hypotensive effect of saralasin and captopril. During treatment with saralasin and captopril significant increases in PRA, plasma angiotensin I concentration and total and active PRC were found and no change in inactive PRC was observed.
mesh_terms: D000328:Adult; D000803:Angiotensin I / Q000097:blood; D000804:Angiotensin II / Q000097:blood; D002216:Captopril / Q000627:therapeutic use; D005260:Female; D006801:Humans; D006973:Hypertension / Q000097:blood* / Q000188:drug therapy; D008297:Male; D012083:Renin / Q000097:blood*; D012504:Saralasin / Q000627:therapeutic use
chemical_list: D000804:Angiotensin II; D000803:Angiotensin I; D002216:Captopril; D012083:Renin; D012504:Saralasin