PMID- 22687542 OWN - NLM STAT- MEDLINE DCOM- 20121022 LR - 20190720 IS - 1347-5215 (Electronic) IS - 0918-6158 (Linking) VI - 35 IP - 6 DP - 2012 TI - Preparation and in vivo evaluation of liposomal everolimus for lung carcinoma and thyroid carcinoma. PG - 975-9 AB - 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. FAU - Iwase, Yuko AU - Iwase Y AD - Institute of Medicinal Chemistry, Hoshi University, Shinagawa-ku, Tokyo, Japan. FAU - Maitani, Yoshie AU - Maitani Y LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Japan TA - Biol Pharm Bull JT - Biological & pharmaceutical bulletin JID - 9311984 RN - 0 (Antineoplastic Agents) RN - 0 (Immunosuppressive Agents) RN - 0 (Liposomes) RN - 7673326042 (Irinotecan) RN - 9HW64Q8G6G (Everolimus) RN - W36ZG6FT64 (Sirolimus) RN - XT3Z54Z28A (Camptothecin) SB - IM MH - Animals MH - Antineoplastic Agents/*administration & dosage MH - Camptothecin/administration & dosage/analogs & derivatives MH - Carcinoma, Small Cell/*drug therapy/pathology MH - Cell Line, Tumor MH - Cell Survival/drug effects MH - Everolimus MH - Female MH - Humans MH - Immunosuppressive Agents/*administration & dosage MH - Irinotecan MH - Liposomes MH - Lung Neoplasms/*drug therapy/pathology MH - Mice MH - Mice, Inbred BALB C MH - Sirolimus/administration & dosage/*analogs & derivatives MH - Thyroid Neoplasms MH - Tumor Burden/drug effects MH - Xenograft Model Antitumor Assays EDAT- 2012/06/13 06:00 MHDA- 2012/10/23 06:00 CRDT- 2012/06/13 06:00 PHST- 2012/06/13 06:00 [entrez] PHST- 2012/06/13 06:00 [pubmed] PHST- 2012/10/23 06:00 [medline] AID - DN/JST.JSTAGE/bpb/35.975 [pii] AID - 10.1248/bpb.35.975 [doi] PST - ppublish SO - Biol Pharm Bull. 2012;35(6):975-9. doi: 10.1248/bpb.35.975.