@article{oai:tsukuba.repo.nii.ac.jp:00027182,
 author = {大石, 基 and 長崎, 幸夫 and Sumitani, Shogo and Oishi, Motoi and Yaguchi, Tatsuya and Murotani, Hiroki and Horiguchi, Yukichi and Suzuki, Minoru and Ono, Koji and Yanagie, Hironobu and Nagasaki, Yukio},
 issue = {13},
 journal = {Biomaterials},
 month = {May},
 note = {Core-polymerized and boron-conjugated micelles (PM micelles) were prepared by free radical copolymerization of a PEG-b-PLA block copolymer bearing an acetal group and a methacryloyl group (acetal-PEG-b-PLA-MA), with 1-(4-vinylbenzyl)-closo-carborane (VB-carborane), and the utility of these micelles as a tumor-targeted boron delivery system was investigated for boron neutron capture therapy (BNCT). Non-polymerized micelles (NPM micelles) that incorporated VB-carborane physically showed significant leakage of VB-carborane (ca. 50%) after 12 h incubation with 10% fetal bovine serum (FBS) at 37 °C. On the other hand, no leakage from the PM micelles was observed even after 48 h of incubation. To clarify the pharmacokinetics of the micelles, 125I (radioisotope)-labeled PM and NPM micelles were administered to colon-26 tumor-bearing BALB/c mice. The 125I-labeled PM micelles showed prolonged blood circulation (area under the concentration curve (AUC): 943.4) than the 125I-labeled NPM micelles (AUC: 495.1), whereas tumor accumulation was similar for both types of micelles (AUCPM micelle: 249.6, AUCNPM micelle: 201.1). In contrast, the tumor accumulation of boron species in the PM micelles (AUC: 268.6) was 7-fold higher than the NPM micelles (AUC: 37.1), determined by ICP-AES. Thermal neutron irradiation yielded tumor growth suppression in the tumor-bearing mice treated with the PM micelles without reduction in body weight. On the basis of these data, the PM micelles represent a promising approach to the creation of boron carrier for BNCT.},
 pages = {3568--3577},
 title = {Pharmacokinetics of core-polymerized, boron-conjugated micelles designed for boron neutron capture therapy for cancer},
 volume = {33},
 year = {2012}
}