Key result
Central tetradecapeptide renin substrate raises BP, vasopressin, and ACTH while reducing PRA versus natural substrate.
Why the study?
Does central injection of tetradecapeptide renin substrate alter blood pressure and hormone levels compared to natural renin substrate in anesthetized dogs?
Population
anesthetized dogs
Comparison
third ventricular injection of 350 pmol… vs central administration of equimolar doses of…
Design
Preclinical
Authors
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Central canine findings on TDP remain hypothesis-generating; leaves open any role in human blood pressure or endocrine regulation.
Does central injection of tetradecapeptide renin substrate alter blood pressure and hormone levels compared to natural renin substrate in anesthetized dogs?
Tetradecapeptide renin substrate exerts its physiological effects via conversion to angiotensin II, demonstrating that it does not require a brain-specific renin-like enzyme.
Ramsay et al. (1979) studied Anesthetized dogs. Tetradecapeptide renin substrate (TDP) vs. Natural renin substrate was evaluated on Arterial blood pressure, plasma renin activity (PRA), vasopressin, and ACTH. Central injection of 350 pmol tetradecapeptide renin substrate caused a long-lasting increase in arterial blood pressure, reduced PRA, and increased vasopressin and ACTH, unlike natural renin substrate.
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