Key result
Dantrolene (10 mg/kg) was cardioprotective in a rat model of digoxin-induced cardiotoxicity, reducing cardiomyocyte degeneration and hyperkalemia (P<0.05).
Why the study?
Digoxin poisoning commonly occurs during digoxin treatment, and dantrolene has been suggested as a suitable strategy for digoxin-induced cardiotoxicity.
Does dantrolene prevent digoxin-induced cardiotoxicity in male rats?
RCT (n=42)
Randomized
No
Does dantrolene prevent digoxin-induced cardiotoxicity in male rats?
p-value: p=<0.05
Dantrolene at 10 mg/kg demonstrates cardioprotective effects against digoxin-induced cardiotoxicity in a rat model, preserving myocardial histology.
BACKGROUND: Digoxin poisoning commonly occurs in people treated with digoxin. It has been suggested that treatment with dantrolene may be a suitable strategy for digoxin-induced cardiotoxicity. OBJECTIVE: The aim of this study was to evaluate the protective effect of dantrolene on digoxininduced cardiotoxicity in male rats. METHODS: This study was approved by the ethics committee of Birjand University of Medical Sciences (Ethical number: IR.BUMS.REC.1400.067). Forty-two Wistar rats weighing between 300- 350 gr were randomly allocated to 7 groups (n = 6) as follows: Normal Saline (NS) group, Normal Saline + Ethanol (NS + ETOH) group, Normal Saline + dantrolene 10 mg/kg (NS + Dan 10) group, Digoxin (Dig) group), Digoxin + dantrolene 5 mg/kg (Dig + Dan 5) group, Digoxin + dantrolene 10 mg/kg (Dig + Dan 10) group, Digoxin + dantrolene 20 mg/kg (Dig + Dan 20) group, Dig was injected intravenously at 12 mL / h (0.25 mg / mL). Dan (5, 10 and 20 mg/kg) was injected intravenously at 5-8 min/mL. After 1 hour, blood samples were obtained from the animals' cavernous sinus and each animal's heartremoved. The blood sample was rapidly centrifuged at 2,500 rpm for 10 minutes and the serum was separated for measurement of creatine phosphokinase (CPK), potassium (K), sodium (Na), calcium (Ca), and magnesium (Mg). The samples were stored at -20°C. The heart samples were fixed in formalin 10% for histopathological evaluation. RESULTS: < 0.05). Histological examination of the heart tissue in the dig group showed cardiomyocyte degeneration, increased edematous intramuscular space associated with hemorrhage, and congestion. Focal inflammatory cell accumulation in the heart tissue was also seen. Cardiomyocytes were clear and arranged in good order in the Dig + Dan 10 group. CONCLUSION: dantrolene (10 mg/kg) was cardioprotective in a model of digoxin-induced cardiotoxicity, secondary to cardiac remodeling and hyperkalemia. However, further research is necessary to determine dantrolene's cardioprotective and cardiotoxic doses in animal models.
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Zardast et al. (2023) conducted an RCT in Digoxin-induced cardiotoxicity (n=42). Dantrolene sodium vs. Digoxin alone and Normal Saline was evaluated on Cardiotoxicity (histopathological evaluation and serum markers) (p=<0.05). Dantrolene (10 mg/kg) was cardioprotective in a rat model of digoxin-induced cardiotoxicity, reducing cardiomyocyte degeneration and hyperkalemia (P<0.05).
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