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  • Title: Urinary kininogen: a possible regulator of kinin formation in normal individuals and subjects with essential hypertension, end-stage renal and liver disease.
    Author: Weinberg MS, Trebbin WM, Solomon RJ.
    Journal: Adv Exp Med Biol; 1986; 198 Pt A():119-25. PubMed ID: 3812087.
    Abstract:
    Most previous studies have not significantly correlated urinary kallikrein to urinary kinins. We investigated whether urinary kininogen might influence kinin formation within the urine. On an ad-lib diet the 24 hour excretion of total and intact kininogen, kinins and kallikrein was determined in 24 control subjects, 20 untreated essential hypertensives, 12 with end-stage renal disease and 8 subjects with liver disease. Kallikrein and kinins were measured by a direct radioimmunoassay. Total kininogen was determined from the sum of preformed kinins and kinins generated after trypsin (intact kininogen). Cross reactivity between purified human low molecular weight kininogen and bradykinin antiserum was 3%. Total and intact kininogen were significantly correlated with kinins in controls, essential hypertension and liver disease. In essential hypertension, end-stage renal and liver diseases kinins were significantly decreased. This was associated with a reduction in kininogen but not kallikrein in essential hypertension and liver disease, and a reduction in kallikrein but not kininogen in end-stage renal disease. Thus, renal kinin generation in various states may be affected by either or both kininogen and kallikrein.
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