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Formulation, physical, in vitro and ex vivo evaluation of nanomedicine-based chemosterilant for non-surgical castration of male animals.
Theriogenology 2018 March 2
The overpopulation of free-roaming companion animals has become the global crisis. The development and application of a suitable, effective, non-surgical approach for animal sterilization would have an enormous advantage over the current surgical method. The main purpose of this study was to develop and evaluate a novel nanomedicine-based chemosterilant for non-surgical castration of male companion animals. In this study, we first sought to investigate the testicular toxicity of different apoptosis-inducing agents. We next synthesized and characterized nano-sized particles which encapsulated the most potent testicular toxicants and evaluated in vitro sterilant properties. Our result showed that doxorubicin exhibited the highest cytotoxic activity against mouse spermatogenic cells. We therefore synthesized and characterized doxorubicin-encapsulated nanoemulsion. The negatively charged particle of doxorubicin-encapsulated nanoemulsion exhibited the anti-proliferative activity towards spermatogetic cells. Apoptosis studies revealed activation of Caspases 3 and 7 as well as annexin V expression. In addition, doxorubicin-encapsulated nanoemulsion exhibited anti-inflammatory activity in lipopolysaccharide-stimulated macrophages. Cell death was observed following treatment of isolated and cultured rat seminiferous tubules with doxorubicin-encapsulated nanoemulsion. In conclusion, nanoemulsion can be a potential carrier for prolonged release and to enhance activity of doxorubicin that may have utility in non-surgical castration of male animals.
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