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[Hypotensive effect of dinitrosyl iron complexes in experiments on waking animals]
Biulleten' Vsesoiuznogo Kardiologicheskogo Nauchnogo Tsentra AMN SSSR
|January 1, 1988
Summary
Dinitrosyl iron complexes (DNIC) effectively lower blood pressure in rats. Hypertensive rats showed greater sensitivity to DNIC, suggesting potential therapeutic applications for blood pressure management.
Area of Science:
- Pharmacology
- Cardiovascular Physiology
- Biochemistry
Background:
- Arterial pressure regulation is complex, involving various signaling pathways.
- Dinitrosyl iron complexes (DNIC) are known to release nitric oxide (NO), a key vasodilator.
- Spontaneously hypertensive rats (SHR) serve as a model for human hypertension.
Purpose of the Study:
- To investigate the effects of DNIC on arterial pressure in normotensive and hypertensive rats.
- To determine the dose-dependency and duration of DNIC's hypotensive effects.
- To explore the mechanism underlying the long-lasting effects of DNIC.
Main Methods:
- Administration of varying doses of DNIC to conscious Wistar (normotensive) and SHR (hypertensive) rats.
- Monitoring of arterial pressure changes over a two-hour period.
- Electron paramagnetic resonance (EPR) spectroscopy to analyze DNIC-protein complex formation.
Main Results:
- DNIC induced a dose-dependent decrease in blood pressure in both rat models.
- SHR exhibited enhanced sensitivity to the hypotensive effects of DNIC compared to Wistar rats.
- Long-lasting effects were attributed to the formation of NO-storing DNIC-protein complexes via Fe(NO)2 transfer.
Conclusions:
- DNIC possess significant blood pressure-lowering properties.
- Hypertensive rats are more responsive to DNIC, indicating potential in hypertension treatment.
- The formation of stable DNIC-protein complexes is crucial for sustained hypotensive effects.