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Effects of chronic amiodarone treatment on rat testis
Ahmet Kağan Özkaya1, Embiya Dilber2, Seren Gülşen Gürgen3
1Department of Pediatrics, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey; Department of Pediatric Emergency, Faculty of Medicine, Cukurova University, Adana, Turkey.
Abstract:
Amiodarone is a potent agent used to treat tachyarrhythmias, which are especially refractory to other medications, in both adults and children. Although widely used as an antiarrhythmic drug, amiodarone causes many serious adverse effects that limit its use. This study investigated the possible morphological and apoptotic effects of amiodarone on rat testes. Amiodarone was administered to male Sprague-Dawley rats at doses of 20 or 200mg/kg/day for 14 days. A histopathological examination of testicular tissue revealed the presence of inflammatory cells in the seminiferous tubule lumen together with swelling and vacuolization in the cytoplasm of some spermatogonia; these effects occured in a dose-dependent manner. Immunohistochemical staining showed evidence of apoptosis, including caspase-3, caspase-9, Bax and increased DNA fragmentation was detected via a terminal deoxynucleotidyl transferase dUTP nick-end labeling assay. In conclusion, the results show that chronic amiodarone treatment causes dose-dependent degenerative and apoptotic effects on rat testes.
Insights
Amiodarone, an antiarrhythmic drug, causes testicular damage in rats. This study found dose-dependent degenerative and apoptotic effects on rat testes, highlighting potential risks of amiodarone treatment.
Area of Science:
- Toxicology
- Reproductive Biology
- Pharmacology
Background:
- Amiodarone is a critical antiarrhythmic medication for refractory tachyarrhythmias.
- Serious adverse effects associated with amiodarone limit its clinical application.
- Potential testicular toxicity of amiodarone requires thorough investigation.
Purpose of the Study:
- To investigate the morphological and apoptotic effects of amiodarone on rat testes.
- To determine the dose-dependent relationship of amiodarone-induced testicular toxicity.
- To elucidate the mechanisms underlying amiodarone's impact on testicular tissue.
Main Methods:
- Male Sprague-Dawley rats were administered amiodarone at 20 or 200mg/kg/day for 14 days.
- Histopathological examination of testicular tissue assessed morphological changes.
- Immunohistochemistry and TUNEL assay were employed to detect apoptosis and DNA fragmentation.
Main Results:
- Dose-dependent testicular damage was observed, including inflammation and vacuolization of spermatogonia.
- Evidence of apoptosis was confirmed through elevated caspase-3, caspase-9, and Bax expression.
- Increased DNA fragmentation in testicular cells indicated significant cellular damage.
Conclusions:
- Chronic amiodarone treatment induces significant dose-dependent degenerative effects on rat testes.
- Amiodarone exposure leads to apoptosis in testicular cells, mediated by caspase pathways.
- These findings underscore the potential reproductive risks associated with amiodarone therapy.
