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[Tachycardia ameliorated by electroacupuncture in morphine withdrawal rats]
Objective:
To establish morphine withdrawal tachycardia model of rat and to observe the effect of electroacupuncture (EA) with different frequency on its heart rate.
Methods:
Morphine dependence was induced in Wistar rats by injection of morphine for 8 days successively, and EA 1 mA in strength was given after withdrawal of morphine with different frequencies of 2 Hz, 15 Hz and 100 Hz, the heart rate and blood pressure were recorded in the awaked rats.
Results:
Morphine abstinent rats showed a 24% increase of heart rate as compared with that of the normal control group, but no significant change was observed in blood pressure. The 100 Hz and 15 Hz EA produced a 13.4% and 13.1% decrease of heart rate respectively, whereas 2 Hz EA produced insignificant change.
Conclusion:
The reducing effect of percutaneous electric stimulation on tachycardia in heroin addicts revealed clinically can be replicated in the rat model.
Insights
Electroacupuncture (EA) effectively reduces heart rate in a rat model of morphine withdrawal tachycardia. Frequencies of 15 Hz and 100 Hz showed significant reductions, unlike 2 Hz EA.
Area of Science:
- Pharmacology
- Neuroscience
- Physiology
Context:
- Opioid withdrawal, particularly from morphine, can lead to significant physiological changes, including tachycardia.
- Understanding the mechanisms and potential treatments for opioid withdrawal symptoms is crucial for clinical practice.
- Electroacupuncture (EA) is a therapeutic technique with potential applications in managing withdrawal syndromes.
Purpose:
- To establish a reliable rat model for morphine withdrawal-induced tachycardia.
- To investigate the efficacy of electroacupuncture (EA) at different frequencies (2 Hz, 15 Hz, 100 Hz) in mitigating this tachycardia.
Summary:
- Morphine dependence was induced in Wistar rats over 8 days.
- Upon withdrawal, rats exhibited a 24% increase in heart rate compared to controls; blood pressure remained unchanged.
- Electroacupuncture (EA) at 100 Hz and 15 Hz significantly decreased heart rate by 13.4% and 13.1%, respectively. 2 Hz EA had no significant effect.
Impact:
- This study successfully replicates the clinical observation of percutaneous electric stimulation reducing tachycardia in heroin addicts within an animal model.
- The findings suggest that specific EA frequencies may be a viable non-pharmacological approach for managing opioid withdrawal-induced tachycardia.
- This research provides a foundation for further investigation into the neurophysiological mechanisms underlying EA's effects on opioid withdrawal symptoms.