What question did this study set out to answer?

The study investigates how adenosine levels influence renin release and hypertension in specific models.

August 1, 1988HypertensionOpen Access

Adenosine in renin-dependent renovascular hypertension.

View Full Paper

Ask AI

Bookmark

Why the study?

Does chronic caffeine treatment alter plasma renin activity and blood pressure in rat models of renovascular hypertension?

Population

Rat models of renin-dependent renovascular hypertension and renin-independent renovascular hypertension…

Comparison

Chronic caffeine treatment vs Non-caffeine-treated rats and sham-operated rats

Design

Preclinical

Follow-up

3 weeks

Authors

AOAkihiro OhnishiTokyo University of Agriculture PLP LiVanderbilt University RBRobert A. BranchUniversity of Southern California

Discussion

Member takes

Implication

Caffeine may accelerate early hypertension via renin in animal renovascular models; hypothesis-generating for adenosine feedback in human renin-dependent hypertension.

Key Points

The study investigates how adenosine levels influence renin release and hypertension in specific models.
Compared plasma renin activity and adenosine levels in two-kidney, one clip (2K1C) models.
Analyzed effects of caffeine on renin activity and blood pressure across renin-dependent and independent groups.
Measured adenosine levels at different time points post arterial clipping.
Plasma adenosine levels increased significantly in 2K1C rats compared to sham-operated rats.
Caffeine enhanced plasma renin activity during the first week but showed diminished effects later in 2K1C rats.
Caffeine accelerated hypertension in renin-dependent models with no impact in renin-independent cases.

Structured PICO

Does chronic caffeine treatment alter plasma renin activity and blood pressure in rat models of renovascular hypertension?

Population

Rat models of renin-dependent renovascular hypertension (two-kidney, one clip [2K1C] and aortic ligation) and renin-independent renovascular hypertension (one-kidney, one clip [1K1C]), along with sham-operated rats

Intervention

Chronic caffeine treatment

Comparator

Non-caffeine-treated rats and sham-operated rats

Outcome

Plasma renin activity, plasma adenosine levels, and arterial blood pressuresurrogate

Adenosine appears to function in a negative feedback loop to mitigate the renin-angiotensin system in renin-dependent renovascular hypertension, as evidenced by caffeine's acceleration of hypertension and hyperreninemia in these models.

Cite This Study

Ohnishi et al. (1988) studied this question.

synapsesocial.com/papers/6a6f3231febe604dd70833e6 https://doi.org/10.1161/01.hyp.12.2.152

View Full Paper

Ask AI

Bookmark

Implication

Caffeine may accelerate early hypertension via renin in animal renovascular models; hypothesis-generating for adenosine feedback in human renin-dependent hypertension.

Adenosine in renin-dependent renovascular hypertension.

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Adenosine in renin-dependent renovascular hypertension.

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

Also Consider