What is the clinical evidence from this study?

Study design: Other. Intervention: Various stimuli (2K1C hypertension, furosemide, low-salt diet, L-NAME) vs. Controls (sham operation, high-salt diet). Primary outcome: NOS and renin gene expression, NOS enzyme activity and renin immunoreactivity (p=<0.05).

What question did this study set out to answer?

This research aims to evaluate the effects of different stimuli on nitric oxide synthase and renin expression in the rat kidney.

December 1, 1995AJP Renal Physiology

Parallel regulation of constitutive NO synthase and renin at JGA of rat kidney under various stimuli

Q: What are the key findings of this study?

NOS activity and gene expression are inversely related to chronic changes in renal perfusion, salt balance, and salt transport, paralleling the known response of renin to these changes.

Q: What question did this study set out to answer?

This research aims to evaluate the effects of different stimuli on nitric oxide synthase and renin expression in the rat kidney.

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Key result

NOS activity and gene expression are inversely related to chronic changes in renal perfusion, salt balance, and salt transport, paralleling the known response of renin to these changes.

Population

Rat models subjected to various stimuli

Comparison

Various stimuli: 1) two-kidney, one-clip… vs Respective controls

Design

Preclinical

Follow-up

3 days to 2 months

Authors

HBHans Martin BosseDüsseldorf University Hospital RBR BöhmCal Poly Humboldt SRS. ReschHeidelberg University

Discussion

Member takes

Implication

Parallel MD NOS-renin regulation observed in rat models; leaves open whether similar coordination applies in human hypertension or salt disorders.

Key Points

This research aims to evaluate the effects of different stimuli on nitric oxide synthase and renin expression in the rat kidney.
Conducted four chronic experiments on rats with varying conditions: Goldblatt hypertension, furosemide treatment, low-salt vs. high-salt diet, and NOS blockade with L-NAME.
Quantified gene expression and activity of NOS and renin using histochemical methods.
Assessed changes in ischemic versus contralateral kidneys and the impact of each treatment on NOS and renin levels.
In 2K1C, significant increases in NOS and renin expression were observed in ischemic kidneys after 3 and 40 days (P < 0.05).
Furosemide treatment led to a marked increase in NOS and renin levels compared with controls (P < 0.05).
L-NAME treatment resulted in a significant reduction of renin levels (P < 0.05) but a moderate, non-significant reduction in NOS activity.

Structured PICO

Population

Rat models subjected to various stimuli (2K1C Goldblatt hypertension, furosemide treatment, low/high salt diet, L-NAME treatment)

Intervention

Various stimuli: 1) two-kidney, one-clip Goldblatt hypertension (2K1C, for 3 and 40 days), 2) furosemide treatment (150 mg/kg/day ip for 5 days), 3) chronic low-salt diet (0.02% for 11 days), 4) chronic blockade of NOS by L-NAME (40 mg/kg/day for 2 months)

Comparator

Respective controls (sham operation, high-salt diet 3%)

Outcome

Changes in activity and gene expression of type I nitric oxide synthase (NOS) at the macula densa and of renin expression and immunoreactivity at the juxtaglomerular apparatussurrogate

Main Result

p-value: p=<0.05

Macula densa-derived nitric oxide appears to be involved in the control of renin synthesis in response to changes in renal perfusion and salt balance.

Cite This Study

Bosse et al. (1995) studied this question. Various stimuli (2K1C hypertension, furosemide, low-salt diet, L-NAME) vs. Controls (sham operation, high-salt diet) was evaluated on NOS and renin gene expression, NOS enzyme activity and renin immunoreactivity (p=<0.05). NOS activity and gene expression are inversely related to chronic changes in renal perfusion, salt balance, and salt transport, paralleling the known response of renin to these changes.

synapsesocial.com/papers/6a6aec4dfd493d2318f41cfa https://doi.org/10.1152/ajprenal.1995.269.6.f793

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Implication

Parallel MD NOS-renin regulation observed in rat models; leaves open whether similar coordination applies in human hypertension or salt disorders.

Parallel regulation of constitutive NO synthase and renin at JGA of rat kidney under various stimuli

Discussion

Member takes

Implication

Key Points

Structured PICO

Main Result

Cite This Study

Parallel regulation of constitutive NO synthase and renin at JGA of rat kidney under various stimuli

Discussion

Member takes

Implication

Key Points

Structured PICO

Main Result

Cite This Study

Also Consider

Also Consider