Journal
COLLOID AND POLYMER SCIENCE
Volume 295, Issue 9, Pages 1455-1461Publisher
SPRINGER
DOI: 10.1007/s00396-017-4113-x
Keywords
Boron neutron capture therapy; PEGylation; Liposomes; Drug delivery; Decaborane; Biodistribution
Categories
Funding
- Program for Development of Strategic Research Center in Private Universities by MEXT
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Various drug delivery systems for boron neutron capture therapy (BNCT) have been developed. To selectively destroy cancer cells, the high accumulation and selective delivery of B-10 into tumor tissue are required. In this study, a polyborane for BNCT with enhanced hydrophobicity was synthesized from decaborane as a boron carrier, and embedded into bare and PEGylated liposomes. These liposomes having diameters of 40-43 nm were injected into tail vein of tumor-bearing mice to evaluate their biodistribution. Boron concentrations in tumor and tumor/blood ratios of the liposomes were reached over 30 mu g/g of tissue and over 5 at 8-24 h, respectively. At 12 h after injection, PEGylated liposomes were found in tumor with high boron level (130.0 mu g/g of tissue). This result showed that the PEGylated liposomes with a diameter of 40 nm were able to achieve efficient intratumoral B-10 amount without replacing the B-11 with B-10.
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