Abstract:Bioassay studies have indicated that angiotensin I (Ang I), but not angiotensin II (Ang II), is degraded by the intact lung. The present study was an attempt to isolate and quantify pulmonary metabolites of Ang I. The pulmonary vascular bed of the rat was isolated and perfused at 4-6 ml/min (< 20 mm Hg) with oxygenated Krebs buffer containing 5% bovine serum albumin. [3H-Leu10]Ang I (3-10 ng) was administered, and pulmonary effluent samples were collected every 15 sec for 5 min. Peptides were isolated by Dowex… Show more
“…From qualitative studies in sheep reported earlier, 31 -M it was suggested that the concentration of All in venous blood was small. Using more sophisticated methodology and especially recovery tracers, we have shown here that the arterial and central venous profiles are very similar.…”
Section: Model Of Steady-state Angiotensin Metabolismmentioning
SUMMARY The arterial and centra] venous concentrations of angiotensin I (AI), Val'-anglotensln II ([Val' 3-8)), both peptides could be found in arterial blood. 1 The calculated blood clearance rates of these two smaller fragments of angiotensin were
“…From qualitative studies in sheep reported earlier, 31 -M it was suggested that the concentration of All in venous blood was small. Using more sophisticated methodology and especially recovery tracers, we have shown here that the arterial and central venous profiles are very similar.…”
Section: Model Of Steady-state Angiotensin Metabolismmentioning
SUMMARY The arterial and centra] venous concentrations of angiotensin I (AI), Val'-anglotensln II ([Val' 3-8)), both peptides could be found in arterial blood. 1 The calculated blood clearance rates of these two smaller fragments of angiotensin were
The sections in this article are:
Historical Background
Pulmonary Metabolism
Angiotensin I
Bradykinin
Angiotensin
II
Angiotensin
III
Angiotensin‐Converting Enzyme: Kininase
II
Cellular and Subcellular Sites of Relevant Pulmonary Enzymes
Immunocytochemistry
Pulmonary Endothelial Cells as a Model System
Clinical Implications
Actions of Peptide Hormones on Lungs
Other Peptides
Discussion and Future Directionsa
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