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Open Access Chemotherapeutic Treatment of Xenograft Spirocerca lupi-associated Sarcoma in a Murine Model

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To date, data are not available concerning the effectiveness of chemotherapy in the treatment of Spirocerca lupi-associated esophageal sarcomas. In the present study, we compared the effectiveness of 4 chemotherapeutic agents against S. lupi-associated osteosarcoma, using a xenograft murine model created in our lab. Samples of xenografted osteosarcoma were inoculated subcutaneously into 5 groups (n = 10 each) of 6-wk-old male and female NOD/SCID mice. Tumor-bearing mice were divided into treatment and control groups. The treatment groups were injected with either pegylated liposomal doxorubicin (6 mg/kg, intravenously, n = 9), doxorubicin (6 mg/kg, intravenously, n = 8), carboplatin (60 mg/kg, intraperitoneally, repeated twice at 1-wk intervals for a total of 2 doses, n = 9), or cisplatin (6 mg/kg, intraperitoneally, n = 8). The control group was injected with buffered saline (n = 9). Tumor size was determined by caliper measurements. Compared with the control group, the pegylated liposomal doxorubicin- and doxorubicin-treated groups, but not the carboplatin or cisplatin groups, showed significant inhibition of tumor growth. Our results indicate that doxorubicin-based drugs are effective against S. lupi-associated sarcomas in a mouse xenograft model. Because it is less toxic than doxorubicin, pegylated liposomal doxorubicin is likely the drug of choice for treatment of S. lupi-associated sarcomas. We suggest that combination of doxorubicin or its pegylated form with surgical excision will improve the prognosis of dogs with this disease.

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Document Type: Miscellaneous

Publication date: 2007-06-01

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  • Comparative Medicine (CM), an international journal of comparative and experimental medicine, is the leading English-language publication in the field and is ranked by the Science Citation Index in the upper third of all scientific journals. The mission of CM is to disseminate high-quality, peer-reviewed information that expands biomedical knowledge and promotes human and animal health through the study of laboratory animal disease, animal models of disease, and basic biologic mechanisms related to disease in people and animals.

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