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HARADA S, EHARA S, ISHII K, YAMAZAKI H, MATSUYAMA S, KAMIYA T, SAKAI T, ARAKAWA K, SATO T, OIKAWA S. IMPROVEMENT OF RADIOSENSITIVE LIQUID-CORE MICROCAPSULES BY YTTRIUM POLYMERIZATION. ACTA ACUST UNITED AC 2011. [DOI: 10.1142/s0129083507001071] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Microcapsules comprising alginate and hyaluronic acid that can be decomposed by radiation are under development. Previously, we observed that radiation efficiently decomposes microcapsules comprising alginate and hyaluronic acid in the ratio 2:1 by weight. In this study, Yttrium ( Y ) was added to these microcapsules to improve their decomposition by radiation. Hyaluronic acid solutions (0.1% weight/volume) were mixed into 0.2% alginate solution, and carboplatin (0.2 mmol) was added; the resultant was used for capsule preparation. Capsules were prepared by spraying the material into mixtures of 4.34% CaCl 2 solution supplemented with Y at final concentrations from 0 to 1.0 × 10−2%. These capsules were irradiated by a single dose of 0.5, 1.0, 1.5, or 2 Gy with 60Co γ-rays. Immediately after irradiation, we observed the release of the core contents of the microcapsule using a micro Particle Induced X-ray Emission (PIXE) camera. The mean diameter of the microcapsules was 37.3 ± 7.8 μm . Maximum content of radiation-induced release was observed for liquid-core microcapsules prepared by polymerization in a 4.34% CaCl 2 solution supplemented with 5.5 × 10−3% Y .
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Affiliation(s)
- S. HARADA
- Department of Radiology, Iwate Medical University, Morioka, Iwate, Japan
| | - S. EHARA
- Department of Radiology, Iwate Medical University, Morioka, Iwate, Japan
| | - K. ISHII
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, Miyagi, Japan
| | - H. YAMAZAKI
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, Miyagi, Japan
| | - S. MATSUYAMA
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, Miyagi, Japan
| | - T. KAMIYA
- Takasaki Institute of the Radiation Chemistry Research Establishment, Japan Atomic Energy Research Institute, Takasaki, Gunma, Japan
| | - T. SAKAI
- Takasaki Institute of the Radiation Chemistry Research Establishment, Japan Atomic Energy Research Institute, Takasaki, Gunma, Japan
| | - K. ARAKAWA
- Takasaki Institute of the Radiation Chemistry Research Establishment, Japan Atomic Energy Research Institute, Takasaki, Gunma, Japan
| | - T. SATO
- Takasaki Institute of the Radiation Chemistry Research Establishment, Japan Atomic Energy Research Institute, Takasaki, Gunma, Japan
| | - S. OIKAWA
- Takasaki Institute of the Radiation Chemistry Research Establishment, Japan Atomic Energy Research Institute, Takasaki, Gunma, Japan
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Harada S, Ehara S, Ishii K, Yamazaki H, Matsuyama S, Sato T, Oikawa S, Kamiya T, Arakawa K, Yokota W, Sera K, Ito J. Targeted Delivery of Chemotherapeutic Agents Using Improved Radiosensitive Liquid Core Microcapsules and Assessment of Their Antitumor Effect. Int J Radiat Oncol Biol Phys 2009; 75:455-62. [DOI: 10.1016/j.ijrobp.2009.02.082] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2008] [Revised: 02/16/2009] [Accepted: 02/17/2009] [Indexed: 11/15/2022]
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Heshmati E, Abdolmaleki P, Mozdarani H, Sarvestani AS. Effects of halogen substitution on Watson–Crick base pairing: A possible mechanism for radiosensitivity. Bioorg Med Chem Lett 2009; 19:5256-60. [DOI: 10.1016/j.bmcl.2009.06.105] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2009] [Revised: 05/21/2009] [Accepted: 06/18/2009] [Indexed: 11/15/2022]
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