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This study aims to determine if chymase-dependent angiotensin II formation influences blood pressure in spontaneously hypertensive rats.

January 1, 2005Hypertension ResearchOpen Access

Role of Chymase-Dependent Angiotensin II Formation in Regulating Blood Pressure in Spontaneously Hypertensive Rats

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Randomized trial investigates blood pressure regulation by chymase-dependent angiotensin II in hypertensive rats, indicating minimal impact.

This study aims to determine if chymase-dependent angiotensin II formation influences blood pressure in spontaneously hypertensive rats.
Measured systolic blood pressure in spontaneously hypertensive rats and Wistar-Kyoto rats.
Compared angiotensin-converting enzyme and chymase activities in aorta extracts from both rat types.
Evaluated effects of ACE inhibitor and chymase inhibitor on vasoconstriction and pressor responses.
Systolic blood pressure was significantly higher in spontaneously hypertensive rats (172 +/- 3 mmHg) compared to Wistar-Kyoto rats (113 +/- 9 mmHg).
Chymase activity in SHR was significantly higher, but its inhibition did not affect blood pressure or vasoconstriction responses.
Both ACE inhibitors and angiotensin II receptor blockers induced hypotensive effects in SHR, unlike chymase inhibitors.

Kirimura et al. (2005) studied this question.

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Randomized trial investigates blood pressure regulation by chymase-dependent angiotensin II in hypertensive rats, indicating minimal impact.