Preparation and in Vivo Evaluation of Liposomal Everolimus for Lung Carcinoma and Thyroid Carcinoma
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概要
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Everolimus has demonstrated antitumor efficacy for various cancers as a result of its inhibition of the mammalian target of rapamycin (mTOR) signaling cascade, which activates cell growth and cell proliferation. However, the low water solubility and low bioavailability of everolimus have prevented its clinical development as an anticancer drug. Therefore, to address the unsuitable characteristic of everolimus, we attempted to prepare liposomal everolimus as a viable drug delivery system, and then evaluated the anticancer efficacy of this system against a medullary thyroid carcinoma cell line (TT cells), a breast cancer cell line (MCF-7 cells) and a small lung carcinoma cell line (NCI-H446 cells). The particle size and entrapment efficacy of liposomal everolimus was ca. 80 nm and more than 90%, respectively. Liposomal everolimus showed higher cytotoxicity against NCI-H446 cells compared with TT cells. Against NCI-H446 tumors, significant suppression of the tumor volume was observed in liposomal everolimus-treated mice by intravenous injection, compared with free everolimus-treated mice by intraperitoneal injection, at a dose of 5 mg/kg without body weight loss. This study showed that liposomal everolimus could be a powerful formulation with anticancer efficacy for some cancers.
著者
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Maitani Yoshie
Institute Of Medicinal Chemistry Hoshi University
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Iwase Yuko
Institute of Medicinal Chemistry, Hoshi University
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