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Exosomes increase the therapeutic index of doxorubicin in breast and ovarian cancer mouse models.
Nanomedicine 2016 September
AIM: To demonstrate that exosomes (exo) could increase the therapeutic index of doxorubicin (DOX).
MATERIALS & METHODS: Exosomes were characterized by nanoparticle tracking analysis and western blot. Tissue toxicity was evaluated by histopathological analysis and drug efficacy by measuring tumor volume. DOX biodistribution was analyzed by MS.
RESULTS: Exosomal doxorubicin (exoDOX) avoids heart toxicity by partially limiting the crossing of DOX through the myocardial endothelial cells. For this reason, mice can be treated with higher concentration of exoDOX thus increasing the efficacy of DOX as demonstrated in breast and ovarian mouse tumors.
CONCLUSION: ExoDOX is safer and more effective than free DOX. Importantly, the first spontaneous transformed syngeneic model of high-grade serous ovarian cancer was utilized for providing a new therapeutic opportunity.
MATERIALS & METHODS: Exosomes were characterized by nanoparticle tracking analysis and western blot. Tissue toxicity was evaluated by histopathological analysis and drug efficacy by measuring tumor volume. DOX biodistribution was analyzed by MS.
RESULTS: Exosomal doxorubicin (exoDOX) avoids heart toxicity by partially limiting the crossing of DOX through the myocardial endothelial cells. For this reason, mice can be treated with higher concentration of exoDOX thus increasing the efficacy of DOX as demonstrated in breast and ovarian mouse tumors.
CONCLUSION: ExoDOX is safer and more effective than free DOX. Importantly, the first spontaneous transformed syngeneic model of high-grade serous ovarian cancer was utilized for providing a new therapeutic opportunity.
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