What question did this study set out to answer?

Determine the impact of synthetic Atriopeptin I and Atriopeptin II on glomerular filtration rate, electrolyte excretion, and arterial blood pressure in a rat model.

March 1, 1987Acta Physiologica Scandinavica

The influence of Atriopeptins I and II on the relationship between glomerular filtration and natriuresis

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Why the study?

Does Atriopeptin I or II affect glomerular filtration, natriuresis, and blood pressure in adult male Sprague-Dawley rats?

Key Points

Determine the impact of synthetic Atriopeptin I and Atriopeptin II on glomerular filtration rate, electrolyte excretion, and arterial blood pressure in a rat model.
Infused Atriopeptin I or Atriopeptin II intravenously at 10 μg h⁻¹ kg⁻¹ for 70 minutes into adult male Sprague-Dawley rats, alongside a parallel time control group.
Assessed whole kidney glomerular filtration rate (GFR), sodium excretion (UNaV), potassium excretion (UKV), urine flow rate, urine osmolality, and arterial blood pressure.
Atriopeptin I infusion maintained baseline GFR (1.34 ± 0.10 to 1.24 ± 0.04 ml min⁻¹ g⁻¹ kidney wt) while significantly increasing UNaV (0.071 ± 0.011 to 0.229 ± 0.038 μmol min⁻¹ g⁻¹ kidney wt, P < 0.01), UKV (0.504 ± 0.073 to 1.138 ± 0.121 μmol min⁻¹ g⁻¹ kidney wt, P < 0.001), and urine flow rate (1.88 ± 0.10 to 2.94 ± 0.15 μl min⁻¹ g⁻¹ kidney wt, P < 0.001) without altering blood pressure.
Atriopeptin II produced a substantial rise in UNaV (0.100 ± 0.008 to 1.404 ± 0.432 μmol min⁻¹ g⁻¹ kidney wt at 50 min, P < 0.01) despite a late decline in GFR (1.37 ± 0.09 to 1.05 ± 0.07 ml min⁻¹ g⁻¹ kidney wt, P < 0.05), alongside a drop in arterial blood pressure from 114 ± 2 to 98 ± 3 mmHg (P < 0.001).

Structured PICO

Does Atriopeptin I or II affect glomerular filtration, natriuresis, and blood pressure in adult male Sprague-Dawley rats?

Population

Adult male Sprague-Dawley rats

Intervention

Continuous intravenous infusion of Atriopeptin I or Atriopeptin II at a rate of 10 μg h-1 kg-1 body wt for 70 min

Comparator

Time control group studied in parallel

Outcome

Whole kidney glomerular filtration rate (GFR), sodium and potassium excretion (UNaV, UKV), urine flow rate (V), and arterial blood pressure (BP)surrogate

Atriopeptin I and II increase sodium excretion primarily via tubular transport processes, with Atriopeptin II additionally decreasing arterial blood pressure.

Discussion

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Implication

Atriopeptins may enhance natriuresis via tubular effects in rats; leaves open translation to human HF or hypertension therapy.

Cite This Study

Hansell et al. (1987) studied this question.

synapsesocial.com/papers/6a852eb769a073149ac6af85 https://doi.org/10.1111/j.1748-1716.1987.tb08079.x

View Full Paper

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The influence of Atriopeptins I and II on the relationship between glomerular filtration and natriuresis

Key Points

Structured PICO

Discussion

Implication

Cite This Study

The influence of Atriopeptins I and II on the relationship between glomerular filtration and natriuresis

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Also Consider

Also Consider