What question did this study set out to answer?

To evaluate regional brain and cerebrospinal fluid angiotensinogen levels across the development of hypertension in spontaneously hypertensive rats compared to normotensive controls.

September 1, 1985HypertensionOpen Access

Angiotensinogen levels in the brain and cerebrospinal fluid of the genetically hypertensive rat.

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Authors

DHDennis P. HealyBayer (United States)MPMorton P. PrintzUniversity of California, San Diego

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Implication

Hypothesis-generating in SHR brain nuclei; leaves open any role in human hypertension pathogenesis.

Key Points

To evaluate regional brain and cerebrospinal fluid angiotensinogen levels across the development of hypertension in spontaneously hypertensive rats compared to normotensive controls.
Measured angiotensinogen in discrete brain nuclei and cerebrospinal fluid in spontaneously hypertensive rats (SHR) and age-matched normotensive Wistar-Kyoto rats (WKY) at 4, 7, and 16 weeks of age.
Obtained cerebrospinal fluid via cisternal puncture at 7 and 16 weeks and measured corresponding plasma angiotensinogen levels.
Brain angiotensinogen levels peaked at 4 weeks across both strains, inversely mirroring plasma concentrations which were lowest at 4 weeks and higher at 7 and 16 weeks.
At 4 weeks (prehypertensive phase), SHR exhibited elevated levels adjacent to the rostral third ventricle (p < 0.05) but lower levels in the amygdala and posterior hypothalamus (p < 0.05) compared to WKY.
At 7 weeks (evolving phase), SHR displayed significant elevations across nine brain regions including the nucleus tractus solitarii (p < 0.01), whereas at 16 weeks (maintenance phase), only two regions remained elevated (p < 0.05), with cerebrospinal fluid levels failing to correlate with brain tissue levels.

Cite This Study

Healy et al. (1985) studied this question.

synapsesocial.com/papers/6a735a75668da3c6682c29bd https://doi.org/10.1161/01.hyp.7.5.752

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Angiotensinogen levels in the brain and cerebrospinal fluid of the genetically hypertensive rat.

Discussion

Member takes

Implication

Key Points

Cite This Study

Angiotensinogen levels in the brain and cerebrospinal fluid of the genetically hypertensive rat.

Discussion

Member takes

Implication

Key Points

Cite This Study

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