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Takeshita K, Ueno M, Fujii-Aikawa K, Okazaki S, Ohta Y, Ozawa T. Protective effects of 2-aminoethylthiosulfuric acid and structurally analogous organosulfur compounds against ionizing radiation. J Clin Biochem Nutr 2023; 72:117-125. [PMID: 36936881 PMCID: PMC10017326 DOI: 10.3164/jcbn.22-88] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 10/16/2022] [Indexed: 01/13/2023] Open
Abstract
High efficacy and minimal toxicity radioprotectors are desirable options for the hazards posed by nuclear medical and energy technologies and the dangers presented by nuclear weapons in an unstable global situation. Although cysteamine is an effective radioprotector, it has considerable toxicity. In this study, the protective effects of the less toxic organosulfur compounds 2-aminoethylthiosulfate (AETS), thiotaurine (TTAU), and hypotaurine (HTAU) against X-ray damage in mice were compared with that of cysteamine. Intraperitoneal injection of either AETS or cysteamine (2.2 mmol/kg body weight) 30 min before X-ray irradiation (7.0 Gy) provided 100% survival for 30 days, limited the decrease in erythrocytes and neutrophils over 9 days, and reduced damage to bone marrow and spleen over 9 days. Neither TTAU nor HTAU provided any protection. In mice, 30 min after AETS administration, non-protein thiol content increased in the spleen, indicating cysteamine generation by AETS hydrolysis, the active protective species of AETS. All examined compounds scavenged •OH under diffusion control in aqueous solution, which is inconsistent with the difference in the protective effects among the compounds. The results indicate that AETS protects animals from ionizing radiation by several mechanisms, including scavenging •OH as cysteamine.
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Affiliation(s)
- Keizo Takeshita
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan
- National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
- Quantitative RedOx Sensing Group, Department of Radiation Regulatory Science Research, National Institute of Radiological Sciences, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
- To whom correspondence should be addressed. E-mail:
| | - Megumi Ueno
- National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
- Quantitative RedOx Sensing Group, Department of Radiation Regulatory Science Research, National Institute of Radiological Sciences, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - Kaori Fujii-Aikawa
- National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - Shoko Okazaki
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan
| | - Yuhei Ohta
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan
| | - Toshihiko Ozawa
- National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
- Nihon Pharmaceutical University, 10281 Komuro, lna-machi, Kitaadachi-gun, Saitama 362-0806, Japan
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Takeshita K, Sawada R, Ishizaka K, Maki R, Sakamoto Y, Nishida M, Ohta Y, Fang J, Okazaki S. Convenient Application of a Compact-Type Magnetic Resonance Imager with Blood Pool Contrast Agent Gadolinium-Conjugated Dextran to Assess Vascular Abnormalities in Experimental Animals. Biol Pharm Bull 2023; 46:730-735. [PMID: 37121700 DOI: 10.1248/bpb.b22-00814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Vascular lesions are symptomatic of lifestyle-related diseases and include blood clots, coarctations, aneurysms, and apoplexy. Furthermore, increased blood vessel permeability is usually observed in tumors. To develop therapeutic drugs treating vascular lesions and tumors, methods with which the vascular abnormalities can be readily assessed in experimental animals are necessary. In this paper, a laboratory-size magnetic resonance imaging (MRI) system with permanent magnets, a compact-type MRI, was used to assess vascular abnormalities. Blood vessels in the head of a mouse were clearly visualized with the compact-type MRI in combination with gadolinium-diethylenetriamine-N,N,N',N″,N″-pentaacetic acid chelate (Gd-DTPA)-linked dextran (Gd-Dex) as blood pool contrast agents. The rat middle cerebral artery was imaged, and artery occlusion was identified. The difference between normal and occluded rats became more apparent upon intravenous injection of sodium nitroprusside, a nitric oxide (NO) donor. The system also visualized poor circulation in a rat saphenous artery by femoral artery occlusion. In a tumor-bearing mouse, a compact-type MRI visualized accumulation of Gd-Dex similar to that of small molecular Gd-DTPA, in the rim of tumor. Gd-Dex accumulation was more consistent than that of Gd-DTPA. Tumor vasculature was characterized by estimating the plasma-to-tumor interstitial tissue transfer constant, Ktrans, of Gd-Dex and fractional plasma volume, Vp, using image data. These results demonstrate the efficacy of a compact-type MRI in combination with Gd-Dex for vascular abnormality assessment in both mice and rats.
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Affiliation(s)
- Keizo Takeshita
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
- DDS Research Institute, Sojo University
| | - Risa Sawada
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
| | - Kotaro Ishizaka
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
| | - Ryoya Maki
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
| | - Yuta Sakamoto
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
| | - Masashi Nishida
- Department of Nanoscience, Faculty of Engineering, Sojo University
| | - Yuhei Ohta
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
| | - Jun Fang
- Laboratory of Microbiology and Oncology, Faculty of Pharmaceutical Sciences, Sojo University
| | - Shoko Okazaki
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
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Anraku M, Mizukai Y, Maezaki Y, Kawano K, Okazaki S, Takeshita K, Adachi T, Otagiri M, Iohara D, Hirayama F. The preparation and validation of chitosan tablets that rapidly disperse and disintegrate as an oral adsorbent in the treatment of lifestyle-related diseases. Carbohydr Polym 2021; 253:117246. [PMID: 33279001 DOI: 10.1016/j.carbpol.2020.117246] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 08/27/2020] [Accepted: 10/12/2020] [Indexed: 11/15/2022]
Abstract
A carrier and an oral absorbent for the treatment of chronic diseases in the form of a tablet was prepared from granulated chitosan (G-CS) particles. The resulting tablet was highly dispersible and disintegrated rapidly (< 30 s) in aqueous media. The non-granulated chitosan (N-CS) powder partially crystallized (2θ = 12-15° and 20°) during wet granulation to give G-CS crystalline particles. The rate of penetration of water into G-CS aggregates was markedly faster than that for N-CS aggregates, as evidenced by the ease of disintegration of the tablets. The rapid disintegration and dispersion of the tablets in vivo was confirmed by MRI measurements after the oral administration of the both tablets to rats. Some ureic toxins were adsorbed more strongly to G-CS tablets than on N-CS tablets. The results suggest that G-CS tablets have great potential for use as a fast disintegrating carrier and as an oral adsorbent in lifestyle-related diseases.
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Affiliation(s)
- Makoto Anraku
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan; DDS Research Institute, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan.
| | - Yasuyuki Mizukai
- Nippon Kayaku Food Techno Co., Ltd., 219, Iwahanamachi, Takasaki, Gunma 370-1208, Japan
| | - Yuji Maezaki
- Nippon Kayaku Food Techno Co., Ltd., 219, Iwahanamachi, Takasaki, Gunma 370-1208, Japan
| | - Kazuo Kawano
- Nippon Kayaku Food Techno Co., Ltd., 219, Iwahanamachi, Takasaki, Gunma 370-1208, Japan
| | - Shoko Okazaki
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan
| | - Keizo Takeshita
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan; DDS Research Institute, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan
| | - Tomoki Adachi
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan
| | - Masaki Otagiri
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan; DDS Research Institute, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan
| | - Daisuke Iohara
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan; DDS Research Institute, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan
| | - Fumitoshi Hirayama
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan; DDS Research Institute, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan
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Okazaki S, Hirata A, Shogomori Y, Takemoto M, Nagata T, Hayashida E, Takeshita K. Radical reactions induced by ketoprofen in phospholipid membranes under ultraviolet light irradiation. J Photochem Photobiol B 2020; 214:112090. [PMID: 33302245 DOI: 10.1016/j.jphotobiol.2020.112090] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/30/2020] [Accepted: 11/19/2020] [Indexed: 11/17/2022]
Abstract
2-(3-Benzoylphenyl)propanoic acid (ketoprofen), one of the nonsteroidal anti-inflammatory drugs, causes photocontact dermatitis by ultraviolet (UV) light as a side effect. In this study, we examined radical reactions induced by ketoprofen in the lipid membranes under UV irradiation using egg yolk phosphatidylcholine (egg-PC) liposomal membranes containing 5- or 16-doxyl stearic acid (5- or 16-DSA), which carry nitroxyl radical at the 5- or 16-position of the fatty acid chain, respectively. When the suspension of liposomal membrane was mixed with ketoprofen and irradiated with UV, electron spin resonance signal of 5- and 16-DSA in the membrane decreased. The decay consisted of fast decay and subsequent slow decay. The overall decay for 5-DSA was faster than that for 16-DSA. The rate of slower decay of 16-DSA increased with ketoprofen concentration. The bulk lipid in the membrane affected the rate of slower decay of 5-DSA; the rate increased with the amount of egg-PC and decreased in the rigid membrane composed of dipalmitoylphosphatidylcholine. When spin trapping studies with α-(4-pyridyl 1-oxide)-N-tert-butylnitrone (POBN) and 5,5-dimetyl-1-pyrroline-N-oxide (DMPO) were performed in ketoprofen solution, C-centered radical adducts of POBN and superoxide anion radical adducts of DMPO were detected after UV irradiation. POBN suppressed the signal decay of 5-DSA in the liposomal membrane, whereas superoxide dismutase accelerated it. These results support that ketoprofen penetrates the lipid membrane and induces a radical reaction near the polar region in the membrane, and that ketoprofen-related C-centered radical is involved in the radical reaction.
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Affiliation(s)
- Shoko Okazaki
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan.
| | - Ayako Hirata
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan
| | - Yusuke Shogomori
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan
| | - Megumi Takemoto
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan
| | - Takuro Nagata
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan
| | - Eriko Hayashida
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan
| | - Keizo Takeshita
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan; DDS Research Institute, Sojo University, Kumamoto 860-0082, Japan.
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Saito K, Okazaki S, Tachibana Y, Anzai K, Ozawa T, Takeshita K. In vivo ESR imaging of redox status in mice after X-ray irradiation, measured by acyl-protected hydroxylamine probe, ACP. Free Radic Biol Med 2020; 160:596-603. [PMID: 32891759 DOI: 10.1016/j.freeradbiomed.2020.08.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 08/27/2020] [Accepted: 08/30/2020] [Indexed: 11/30/2022]
Abstract
More detailed investigations on the in vivo redox status are needed to elucidate the mechanisms contributing to damage caused by ionizing radiation. In the present study, the in vivo redox status of mice was examined using in vivo electron spin resonance (ESR) imaging after an intraperitoneal injection of 1-acetoxy-3-carbamoyl-2,2,5,5-tetramethylpyrrolidine (ACP) as a probe. ACP is easily hydrolyzed to its hydroxylamine form in the mouse body, and the interconversion between hydroxylamine and the corresponding nitroxyl radical reflects the biological redox status. Liver damage, based on changes in liver weight and plasma aspartate aminotransferase levels, was detected in mice 4 days after X-ray irradiation at 7.5 Gy. ESR imaging showed that the signal intensity of the nitroxyl radical was high at the liver area in both damaged and healthy mice after administration of ACP. Whereas the signal decayed at the liver area for healthy mouse, the decay was negligible in damaged mice. Unlike healthy mouse, signal in the chest for damaged mouse increased with time. The distribution of the sum of hydroxylamine and the nitroxyl radical was similar in damaged and healthy mice. X-ray irradiation slightly lowered the reduction activity of the liver microsomal fraction for the nitroxyl radical. Thiobarbituric acid reactive substances in the liver were higher in damaged mice than in healthy mice; however, no significant differences were noted in reduced glutathione. The present results indicate that the redox status of mice exposed to X-ray irradiation is more oxidative than that in healthy mice.
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Affiliation(s)
- Keita Saito
- National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan
| | - Shoko Okazaki
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto, 860-0082, Japan
| | - Yoko Tachibana
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto, 860-0082, Japan
| | - Kazunori Anzai
- National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan; Nihon Pharmaceutical University, 10281 Komuro, Ina-machi, Kita-Adachi-gun, Saitama, 362-0806, Japan
| | - Toshihiko Ozawa
- National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan; Nihon Pharmaceutical University, 10281 Komuro, Ina-machi, Kita-Adachi-gun, Saitama, 362-0806, Japan
| | - Keizo Takeshita
- National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan; Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto, 860-0082, Japan.
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Gao S, Ogawa M, Takami A, Takeshita K, Kato H. Practical and Safe Method of Long-Term Cryopreservation for Clinical Application of Human Adipose-Derived Mesenchymal Stem Cells Without a Programmable Freezer Or Serum. Cryo Letters 2020; 41:337-343. [PMID: 33990810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
BACKGROUND Adipose-derived mesenchymal stem cells (ADSCs) have emerged as a promising modality for cellular therapy. However, techniques of ADSC cryopreservation, which can facilitate their clinical application, haven't been established yet. OBJECTIVE To determine optimal conditions for ADSC cryopreservation. MATERIALS AND METHODS We used three cryoprotectants [serum containing 10% dimethyl sulfoxide; CP-1TM (5% dimethyl sulfoxide, serum-free); Stem-CellBankerTM (dimethyl sulfoxide and serum-free)], two storage temperatures (-80°C, -150°C) and two cell densities (1 × 106, 7 × 106 cells/mL). Storage was up to 18 months using cryovials. We didn't use a rate-controlled freezer or liquid nitrogen storage. RESULTS We found that CP-1TM was a suitable cryoprotectant. Storage at -150°C and higher cell density (7×106 cells/mL) kept the best viability of ADSCs, but storage at -80°C and a lower cell density (1×106 cells/mL) is acceptable for up to 9 months. We also confirmed large quantities of ADSCs, stored with CP-1 in a cryobag, were still viable after -150°C cryopreservation for 24 months. CONCLUSION We have developed a safe, cost-effective way to cryopreserve ADSCs that could be used in the clinical setting.
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Affiliation(s)
- S Gao
- Department of Transfusion Medicine, Aichi Medical University, Nagakute, Aichi 480-1195, Japan.
| | - M Ogawa
- Clinical Laboratory, Aichi Medical University, Nagakute, Aichi 480-1195, Japan
| | - A Takami
- Department of Hematology, Aichi Medical University, Nagakute, Aichi 480-1195, Japan
| | - K Takeshita
- Department of Clinical Laboratory, Saitama Medical Center, Kawagoe, Saitama 350-8550, Japan
| | - H Kato
- Department of Transfusion Medicine, Aichi Medical University, Nagakute, Aichi 480-1195, Japan
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Takeshita K, Okazaki H, Tsukamoto M, Okazaki S. Differences in pharmacokinetic behaviors of two lipophilic 3-substituted 2,2,5,5-tetramethylpyrrolidine-N-oxyl radicals, in vivo probes to assess the redox status in the brain using magnetic resonance techniques. Magn Reson Med 2020; 85:560-569. [PMID: 32905631 DOI: 10.1002/mrm.28499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/29/2020] [Accepted: 08/05/2020] [Indexed: 12/15/2022]
Abstract
PURPOSE The pharmacokinetics of 3-methoxycarbonyl- and 3-hydroxymethyl-2,2,5,5-tetramethylpyrrolidine-N-oxyl radicals (MCP and HMP, respectively), magnetic resonance probes to assess the brain redox status, were examined in healthy mouse brains. METHODS The time course of the concentration of the radical form of the probe in the brain was examined by signal enhancements on T1 -weighted MR image after an intravenous injection. The distribution of the total probe (sum of radical and reduced forms) was investigated using brain homogenates. RESULTS MCP distributed to the brain more than HMP. MCP exhibited biphasic decay with fast and slow components, whereas HMP exhibited monophasic decay with a similar rate constant to the slow component of MCP. Similar profiles were observed in various regions of the brain. The total probe for MCP exhibited monophasic decay at a similar rate constant to the slow component of the radical form; however, the initial content of the total probe was similar to its radical form. For HMP, decay of the total probe coincided with that of the radical form. CONCLUSION The decay of MCP needs to consider the reduction of the probe in and its elimination from the brain, while the decay of HMP may mainly result from its elimination from the brain.
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Affiliation(s)
- Keizo Takeshita
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto, Japan.,DDS Research Institute, Sojo University, Kumamoto, Japan
| | - Hana Okazaki
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto, Japan
| | - Megumi Tsukamoto
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto, Japan
| | - Shoko Okazaki
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto, Japan
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Leiman D, Minkowitz H, Levitt R, Solanki D, Horn D, Janfaza D, Sarno D, Albores-Ibarra N, Bai X, Takeshita K, Zhao T, Lu CW, Bharathi P, Ahern J, Klincewicz S, Nedeljkovic S. Preliminary results from a phase 1b double-blind study to assess the safety, tolerability and efficacy of intra-articular administration of resiniferatoxin or placebo for the treatment of moderate to severe pain due to osteoarthritis of the knee. Osteoarthritis Cartilage 2020. [DOI: 10.1016/j.joca.2020.02.228] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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Okamura T, Kawai K, Minari E, Nakase M, Asano H, Takeshita K. Effect of Cs and Sr separation on occupied area reduction in current nuclear energy system and its evaluation by CAERA index. SEP SCI TECHNOL 2019. [DOI: 10.1080/01496395.2019.1577897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- T. Okamura
- Laboratory for Advanced Nuclear Energy, Institute of Innovative Research, Tokyo Institute of Technology, Tokyo, Japan
| | - K. Kawai
- Laboratory for Advanced Nuclear Energy, Institute of Innovative Research, Tokyo Institute of Technology, Tokyo, Japan
| | - E. Minari
- Laboratory for Advanced Nuclear Energy, Institute of Innovative Research, Tokyo Institute of Technology, Tokyo, Japan
| | - M. Nakase
- Laboratory for Advanced Nuclear Energy, Institute of Innovative Research, Tokyo Institute of Technology, Tokyo, Japan
| | - H. Asano
- Laboratory for Advanced Nuclear Energy, Institute of Innovative Research, Tokyo Institute of Technology, Tokyo, Japan
- Radioactive Waste Management Funding and Research Center, Tokyo, Japan
| | - K. Takeshita
- Laboratory for Advanced Nuclear Energy, Institute of Innovative Research, Tokyo Institute of Technology, Tokyo, Japan
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Affiliation(s)
- M. Nakase
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, Tokyo, Japan
| | - T. Yamamura
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, Osaka, Japan
| | - K. Shirasaki
- Institute of Alpha-Ray Emitters, Institute for Materials Research, Tohoku University, Sendai, Japan
| | - M. Nagai
- Institute of Alpha-Ray Emitters, Institute for Materials Research, Tohoku University, Sendai, Japan
| | - K. Takeshita
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, Tokyo, Japan
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Mizuki K, Matsumoto S, Honda T, Maeda K, Toyama S, Iohara D, Hirayama F, Okazaki S, Takeshita K, Hatta T. Synthesis, Aggregation Behavior, and Photodynamic Properties of a Water-Soluble Fulleropyrrolidine Bearing an N-PEG Pyridinium Unit. Chem Pharm Bull (Tokyo) 2018; 66:822-825. [DOI: 10.1248/cpb.c18-00206] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Keiji Mizuki
- Department of Nanoscience, Faculty of Engineering, Sojo University
| | - Seigo Matsumoto
- Department of Nanoscience, Faculty of Engineering, Sojo University
| | - Taro Honda
- Department of Nanoscience, Faculty of Engineering, Sojo University
| | - Kouhei Maeda
- Department of Nanoscience, Faculty of Engineering, Sojo University
| | - Satoshi Toyama
- Department of Nanoscience, Faculty of Engineering, Sojo University
| | | | | | | | | | - Taizo Hatta
- Department of Nanoscience, Faculty of Engineering, Sojo University
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Ueno M, Iijima H, Takeshita K, Takahashi H, Yoshida T, Uehara H, Igota H, Matsuura Y, Ikeda T, Azumaya M, Kaji K. Robustness of adult female survival maintains a high-density sika deer (Cervus nippon) population following the initial irruption. Wildl Res 2018. [DOI: 10.1071/wr17103] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Context Irruption of large herbivore populations is characterised by three distinct phases: (1) an exponential increase in population to a peak abundance; (2) a population crash; and (3) a second increase to another population peak, typically lower than the first peak of abundance. However, there has been little study of age- and sex-specific factors that affect the post-initial irruption interactions with food sources. Aims We aimed to investigate annual survival rates of sika deer (Cervus nippon Temminck, 1838) in the sequent irruption of a population on Nakanoshima Island, Lake Toya, Japan, with a chronically high density during the period 2002–12. Methods Survival monitoring data were obtained for 219 individuals (93 males and 126 females) using radio-collars. Annual survival was quantified, and related factors, i.e. deer abundance and winter severity, were determined by model selection using Akaike information criterion values. Key Results The results showed that annual survival rates across sexes and age classes (fawn, yearling, prime-aged, old) decreased with increasing population density, snow depth and winter precipitation. Winter severity had a greater effect on adult survival than density regulation. Nevertheless, female adult survival was maintained at a high level, with a mean of 0.84 (95% CI: 0.80–0.88). Key conclusions Robust survival rates for adult females might contribute to the maintenance of a high-density sika deer population in the post-initial irruption. Implications We suggest that in the absence of predation and hunting, sika deer population is not able to self-regulate to the density level that avoids an irreversible impact on plants.
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Tabuchi R, Anraku M, Iohara D, Ishiguro T, Ifuku S, Nagae T, Uekama K, Okazaki S, Takeshita K, Otagiri M, Hirayama F. Surface-deacetylated chitin nanofibers reinforced with a sulfobutyl ether β-cyclodextrin gel loaded with prednisolone as potential therapy for inflammatory bowel disease. Carbohydr Polym 2017; 174:1087-1094. [DOI: 10.1016/j.carbpol.2017.07.028] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 06/23/2017] [Accepted: 07/10/2017] [Indexed: 10/19/2022]
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Takeshita K, Okazaki S, Shinada K, Shibamoto Y. Application of a Compact Magnetic Resonance Imaging System with 1.5 T Permanent Magnets to Visualize Release from and the Disintegration of Capsule Formulations in Vitro and in Vivo. Biol Pharm Bull 2017; 40:1268-1274. [PMID: 28769009 DOI: 10.1248/bpb.b17-00154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Although magnetic resonance imaging (MRI) has potential in assessments of formulations, few studies have been conducted because of the size and expense of the instrument. In the present study, the processes of in vitro and in vivo release in a gelatin capsule formulation model were visualized using a compact MRI system with 1.5 T permanent magnets, which is more convenient than the superconducting MRI systems typically used for clinical and experimental purposes. A Gd-chelate of diethylenetriamine-N,N,N',N″,N″-pentaacetic acid, a contrast agent that markedly enhances proton signals via close contact with water, was incorporated into capsule formulations as a marker compound. In vitro experiments could clearly demonstrate the preparation-dependent differences in the release/disintegration of the formulations. In some preparations, the penetration of water into the formulation and generation of bubbles in the capsule were also observed prior to the disintegration of the formulation. When capsule formulations were orally administered to rats, the release of the marker into the stomach and its transit to the duodenum were visualized. These results strongly indicate that the compact MRI system is a powerful tool for pharmaceutical studies.
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Affiliation(s)
- Keizo Takeshita
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University.,DDS Research Institute, Sojo University
| | - Shoko Okazaki
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
| | - Kyosuke Shinada
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
| | - Yuma Shibamoto
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
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15
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Hiraiwa H, Okumura T, Sawamura A, Sugiura Y, Kondo T, Watanabe N, Aoki S, Ichii T, Kano N, Fukaya K, Furusawa K, Morimoto R, Takeshita K, Bando Y, Murohara T. P712The Selvester QRS score as a predictor of cardiac events in nonischemic dilated cardiomyopathy. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx501.p712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- H. Hiraiwa
- Nagoya University, Department of Cardiology, Nagoya, Japan
| | - T. Okumura
- Nagoya University, Department of Cardiology, Nagoya, Japan
| | - A. Sawamura
- Nagoya University, Department of Cardiology, Nagoya, Japan
| | - Y. Sugiura
- Nagoya University, Department of Cardiology, Nagoya, Japan
| | - T. Kondo
- Nagoya University, Department of Cardiology, Nagoya, Japan
| | - N. Watanabe
- Nagoya University, Department of Cardiology, Nagoya, Japan
| | - S. Aoki
- Nagoya University, Department of Cardiology, Nagoya, Japan
| | - T. Ichii
- Nagoya University, Department of Cardiology, Nagoya, Japan
| | - N. Kano
- Nagoya University, Department of Cardiology, Nagoya, Japan
| | - K. Fukaya
- Nagoya University, Department of Cardiology, Nagoya, Japan
| | - K. Furusawa
- Nagoya University, Department of Cardiology, Nagoya, Japan
| | - R. Morimoto
- Nagoya University, Department of Cardiology, Nagoya, Japan
| | - K. Takeshita
- Nagoya University Hospital, Department of Clinical Laboratory, Nagoya, Japan
| | - Y. Bando
- Nagoya University, Department of Cardiology, Nagoya, Japan
| | - T. Murohara
- Nagoya University, Department of Cardiology, Nagoya, Japan
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Younes A, Hilden P, Coiffier B, Hagenbeek A, Salles G, Wilson W, Seymour JF, Kelly K, Gribben J, Pfreunschuh M, Morschhauser F, Schoder H, Zelenetz AD, Rademaker J, Advani R, Valente N, Fortpied C, Witzig TE, Sehn LH, Engert A, Fisher RI, Zinzani PL, Federico M, Hutchings M, Bollard C, Trneny M, Elsayed YA, Tobinai K, Abramson JS, Fowler N, Goy A, Smith M, Ansell S, Kuruvilla J, Dreyling M, Thieblemont C, Little RF, Aurer I, Van Oers MHJ, Takeshita K, Gopal A, Rule S, de Vos S, Kloos I, Kaminski MS, Meignan M, Schwartz LH, Leonard JP, Schuster SJ, Seshan VE. International Working Group consensus response evaluation criteria in lymphoma (RECIL 2017). Ann Oncol 2017; 28:1436-1447. [PMID: 28379322 PMCID: PMC5834038 DOI: 10.1093/annonc/mdx097] [Citation(s) in RCA: 200] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Indexed: 12/20/2022] Open
Abstract
In recent years, the number of approved and investigational agents that can be safely administered for the treatment of lymphoma patients for a prolonged period of time has substantially increased. Many of these novel agents are evaluated in early-phase clinical trials in patients with a wide range of malignancies, including solid tumors and lymphoma. Furthermore, with the advances in genome sequencing, new "basket" clinical trial designs have emerged that select patients based on the presence of specific genetic alterations across different types of solid tumors and lymphoma. The standard response criteria currently in use for lymphoma are the Lugano Criteria which are based on [18F]2-fluoro-2-deoxy-D-glucose positron emission tomography or bidimensional tumor measurements on computerized tomography scans. These differ from the RECIST criteria used in solid tumors, which use unidimensional measurements. The RECIL group hypothesized that single-dimension measurement could be used to assess response to therapy in lymphoma patients, producing results similar to the standard criteria. We tested this hypothesis by analyzing 47 828 imaging measurements from 2983 individual adult and pediatric lymphoma patients enrolled on 10 multicenter clinical trials and developed new lymphoma response criteria (RECIL 2017). We demonstrate that assessment of tumor burden in lymphoma clinical trials can use the sum of longest diameters of a maximum of three target lesions. Furthermore, we introduced a new provisional category of a minor response. We also clarified response assessment in patients receiving novel immune therapy and targeted agents that generate unique imaging situations.
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Affiliation(s)
| | - P. Hilden
- Biostatistics, Memorial Sloan-Kettering Cancer Center, New York, USA
| | - B. Coiffier
- Hematology, Université Lyon-1, Lyon-Sud Charles Mérieux, Lyon, France
| | - A. Hagenbeek
- Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - G. Salles
- Hematology, Université Lyon-1, Lyon-Sud Charles Mérieux, Lyon, France
| | - W. Wilson
- Lymphoid Malignancies Branch, National Cancer Institute, Bethesda, USA
| | - J. F. Seymour
- Peter MacCallum Cancer Centre and University of Melbourne, Australia
| | - K. Kelly
- Pediatrics Department, Roswell-Park Cancer Institute, Buffalo, USA
| | - J. Gribben
- Department of Haemato-Oncology, Barts Cancer Institute, London, UK
| | - M. Pfreunschuh
- Department of Internal Medicine, Universität des Saarlandes, Homburg, Germany
| | - F. Morschhauser
- Department of Hematology, Université de Lille 2, Lille, France
| | - H. Schoder
- Department of Radiology, Memorial Sloan-Kettering Cancer Center, New York
| | | | - J. Rademaker
- Department of Radiology, Memorial Sloan-Kettering Cancer Center, New York
| | - R. Advani
- Department of Oncology, Stanford University, Stanford
| | | | | | | | - L. H. Sehn
- British Columbia Cancer Agency, Vancouver, Canada
| | - A. Engert
- Department of Internal Medicine, University Hospital of Cologne, Cologne, Germany
| | | | - P.-L. Zinzani
- Department of Hematology, University of Bologna, Bologna
| | - M. Federico
- Department of Diagnostic Medicine, University of Modena, Modena, Italy
| | - M. Hutchings
- Department of Hematology, University of Copenhagen, Denmark
| | - C. Bollard
- Children’s National Health System, Washington, USA
| | - M. Trneny
- Lymphoma and Stem Cell Transplantation Program, Charles University, Prague, Czech Republic
| | | | - K. Tobinai
- Department of Hematology, National Cancer Center Hospital, Tokyo, Japan
| | - J. S. Abramson
- Massachusetts General Hospital, Center for Lymphoma, Boston
| | - N. Fowler
- U.T. M.D.Anderson Cancer Center, Houston
| | - A. Goy
- John Theurer Cancer Center, Hackensack University Medical Center, Hackensack
| | - M. Smith
- Cleveland Clinic, Cleveland, USA
| | | | - J. Kuruvilla
- Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, Toronto, Canada
| | - M. Dreyling
- Medicine Clinic III, Ludwig Maximilian University, Munich, Germany
| | | | - R. F. Little
- Divisions of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, Bethesda, USA
| | - I. Aurer
- Department of Hematology, University Hospital Centre Zagreb, Zagreb, Croatia
| | | | | | - A. Gopal
- Fred Hutchinson Cancer Research Center, Seattle, USA
| | - S. Rule
- Haematology Department, Plymouth University, UK
| | | | - I. Kloos
- Servier, Neuilly sur Seine, France
| | - M. S. Kaminski
- University of Michigan Comprehensive Cancer Center, Ann Arbor, USA
| | - M. Meignan
- Nuclear Medicine, Hôpitaux Universitaires Henri Mondor, Créteil, France
| | - L. H. Schwartz
- Columbia University College of Physicians and Surgeons and New York Presbyterian Hospital, New York
| | - J. P. Leonard
- Weill Cornell Medicine and and New York Presbyterian Hospital, New York
| | - S. J. Schuster
- University of Pennsylvania School of Medicine, Philadelphia, USA
| | - V. E. Seshan
- Biostatistics, Memorial Sloan-Kettering Cancer Center, New York, USA
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Irie T, Takeshita K, Makita K, Yamauchi T, Kusano S. A One-Stage Method for Obtaining CT during Arterial Portography and Hepatic Arteriography. Acta Radiol 2016. [DOI: 10.1177/028418519403500206] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
We describe a new technique for performing CT during arterial portography (CTAP) and during hepatic arteriography (CTHA) in a one-stage procedure, using a coaxial balloon catheter system and slip-ring CT equipment. This technique was employed in 10 patients with liver neoplasms. Both CTAP and CTHA images were obtained in all patients.
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Yamakawa M, Ouhara K, Kajiya M, Munenaga S, Kittaka M, Yamasaki S, Takeda K, Takeshita K, Mizuno N, Fujita T, Sugiyama E, Kurihara H. Porphyromonas gingivalis infection exacerbates the onset of rheumatoid arthritis in SKG mice. Clin Exp Immunol 2016; 186:177-189. [PMID: 27465496 DOI: 10.1111/cei.12847] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/25/2016] [Indexed: 12/11/2022] Open
Abstract
Epidemiological studies have linked periodontitis to rheumatoid arthritis (RA). Porphyromonas gingivalis (Pg) was reported recently to produce citrullinated protein (CP) and increase anti-cyclic CP antibody (ACPA), both of which have been identified as causative factors of RA. In the present study, we determined the effects of Pg infection on the exacerbation of RA in a mouse model. RA model mice (SKG mice) were established by an intraperitoneal (i.p.) injection of laminarin (LA). Mice were divided into six groups, Ctrl (PBS injection), LA (LA injection), Pg/LA (Pg + LA injection), Pg (Pg injection), Ec/LA (Escherichia coli and LA injection) and Ec (E. coli injection). In order to evaluate RA, joint swelling by the arthritis score, bone morphology by microcomputed tomography (microCT), haematoxylin and eosin staining, ACPA, matrix metalloproteinase-3 (MMP-3) and cytokine level in serum by enzyme-linked immunosorbent assay were determined. Osteoclast differentiation from bone marrow mononuclear cells (BMCs) was examined to clarify the underlying mechanisms of RA. The presence of Pg and CP in joint tissue was also investigated. The arthritis score was threefold higher in the Pg/LA group than in the LA group. Severe bone destruction was observed in joint tissue of the Pg/LA group. A microCT analysis of the Pg/LA group revealed a decrease in bone density. ACPA, MMP-3, interleukin (IL)-2, IL-6, CXCL1 and macrophage inflammatory protein (MIP)-1α levels from the Pg/LA group were the highest. The osteoclastogenesis of BMCs was enhanced in the Pg/LA group. Furthermore, large amounts of Pg components and CP were detected in the Pg/LA group. In conclusion, Pg infection has the potential to exacerbate RA.
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Affiliation(s)
- M Yamakawa
- Department of Periodontal Medicine, Division of Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University
| | - K Ouhara
- Department of Periodontal Medicine, Division of Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University.
| | - M Kajiya
- Department of Periodontal Medicine, Division of Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University
| | - S Munenaga
- Department of Periodontal Medicine, Division of Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University
| | - M Kittaka
- Department of Periodontal Medicine, Division of Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University
| | - S Yamasaki
- Department of Clinical Immunology and Rheumatology, Hiroshima University Hospital, Hiroshima, Japan
| | - K Takeda
- Department of Periodontal Medicine, Division of Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University
| | - K Takeshita
- Department of Periodontal Medicine, Division of Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University
| | - N Mizuno
- Department of Periodontal Medicine, Division of Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University
| | - T Fujita
- Department of Periodontal Medicine, Division of Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University
| | - E Sugiyama
- Department of Clinical Immunology and Rheumatology, Hiroshima University Hospital, Hiroshima, Japan
| | - H Kurihara
- Department of Periodontal Medicine, Division of Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University
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Takeshita K, Matsumoto KI. Development of Magnetic Resonance Based Functional Imaging Techniques Heading Up to Theranostics ~Creating Next Generation Functional Contrast Agents~. YAKUGAKU ZASSHI 2016; 136:1073-4. [DOI: 10.1248/yakushi.15-00234-f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Keizo Takeshita
- Laboratory of Analytical Sciences, Faculty of Pharmaceutical Sciences, Sojo University
| | - Ken-ichiro Matsumoto
- Quantitative RedOx Sensing Team, Department of Basic Medical Sciences for Radiation Damages, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology
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Takeshita K, Okazaki S, Hirose Y. Pharmacokinetics of lipophilically different 3-substituted 2,2,5,5-tetramethylpyrrolidine-N-oxyl radicals frequently used as redox probes in in vivo magnetic resonance studies. Free Radic Biol Med 2016; 97:263-273. [PMID: 27302159 DOI: 10.1016/j.freeradbiomed.2016.06.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 06/09/2016] [Accepted: 06/10/2016] [Indexed: 12/25/2022]
Abstract
3-Carboxy-, 3-carbamoyl-, 3-hydroxymethyl, and 3-methoxycarbonyl-2,2,5,5-tetramethylpyrrolidine-N-oxyl radicals (CxP, CmP, HMP, and MCP, respectively) have been widely used as redox probes in in vivo magnetic resonance studies. Knowledge of the pharmacokinetics of these probes is essential for redox analyses. The apparent partition coefficient (Kp) of these probes at neutral pH was in the order of MCP>HMP>CmP>CxP. After these probes had been injected intravenously, their blood levels decayed in a bi-phasic manner, namely, fast decay followed by slow decay. The order of the area under the curve (AUC) was CxP»HMP>MCP≥CmP, which roughly coincided with that of Kp in the opposite direction, except for CmP. Decay in the slow phase largely affected the AUC of these probes. The reduction of these probes contributed to their decay in the slow phase. A two-compartment model analysis of blood levels, cyclic voltammetry, and magnetic resonance imaging provided the following pharmacokinetic information. The distribution of the probes between the central and peripheral compartments rapidly reached an equilibrium. In addition to lipophilicity, reduction potential may also be involved in the rate of in vivo reduction of the probes. Hydrophilic probes, such as CxP and CmP, were predominantly excreted in the urine. MCP was distributed to the peripheral tissues and then rapidly reduced. HMP was unique due to its moderate lipophilicity and slower reduction. Among the probes examined, the liver and kidney appear to be included in the central compartment in the two-compartment model analysis. MCP and HMP were rapidly distributed to the brain.
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Affiliation(s)
- Keizo Takeshita
- Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan.
| | - Shoko Okazaki
- Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan
| | - Yuriko Hirose
- Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan
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Liu Y, Mizumoto A, Ishibashi H, Takeshita K, Hirano M, Ichinose M, Takegawa S, Yonemura Y. Should total gastrectomy and total colectomy be considered for selected patients with severe tumor burden of pseudomyxoma peritonei in cytoreductive surgery? Eur J Surg Oncol 2016; 42:1018-23. [DOI: 10.1016/j.ejso.2016.04.059] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Revised: 03/24/2016] [Accepted: 04/18/2016] [Indexed: 01/26/2023] Open
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Sekizawa O, Uruga T, Takagi Y, Nitta K, Kato K, Tanida H, Uesugi K, Hoshino M, Ikenaga E, Takeshita K, Takahashi S, Sano M, Aoyagi H, Watanabe A, Nariyama N, Ohashi H, Yumoto H, Koyama T, Senba Y, Takeuchi T, Furukawa Y, Ohata T, Matsushita T, Ishizawa Y, Kudo T, Kimura H, Yamazaki H, Tanaka T, Bizen T, Seike T, Goto S, Ohno H, Takata M, Kitamura H, Ishikawa T, Tada M, Yokoyama T, Iwasawa Y. SPring-8 BL36XU: Catalytic Reaction Dynamics for Fuel Cells. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1742-6596/712/1/012142] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Komine H, Takeshita K, Abe S, Ishikawa T, Kimura M, Hashimoto T, Kitaura K, Morosawa T, Seki K, Kaji K. Relationships between capture-site characteristics and capture levels of the invasive mongoose on Amami-Oshima Island, Japan. Biol Invasions 2015. [DOI: 10.1007/s10530-015-1021-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Takeshita K, Ishizaki M, Mitsuya R, Takahashi H, Yoshida T, Igota H, Ikeda T, Kubo MO, Kaji K. Temporal changes in molar wear rate of a sika deer population under density‐dependent food limitation. J Zool (1987) 2015. [DOI: 10.1111/jzo.12258] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- K. Takeshita
- Laboratory of Wildlife Management Department of Agriculture Tokyo University of Agriculture and Technology Tokyo Japan
| | - M. Ishizaki
- Laboratory of Wildlife Management Department of Agriculture Tokyo University of Agriculture and Technology Tokyo Japan
| | - R. Mitsuya
- Laboratory of Wildlife Management Department of Agriculture Tokyo University of Agriculture and Technology Tokyo Japan
| | - H. Takahashi
- Kansai Research Center Forestry and Forest Products Research Institute Kyoto Japan
| | - T. Yoshida
- Department of Environmental and Symbiotic Science Rakuno Gakuen University Hokkaido Japan
| | - H. Igota
- Department of Environmental and Symbiotic Science Rakuno Gakuen University Hokkaido Japan
| | - T. Ikeda
- Laboratory of Wildlife Management Department of Agriculture Tokyo University of Agriculture and Technology Tokyo Japan
| | - M. O. Kubo
- The University Museum The University of Tokyo Tokyo Japan
| | - K. Kaji
- Laboratory of Wildlife Management Department of Agriculture Tokyo University of Agriculture and Technology Tokyo Japan
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Nakase M, Takeshita K, Kobayashi T, Shiwaku H, Yaita T. Structure and complexation studies on 2,2′-bipyridyl and trivalent lanthanides. SEP SCI TECHNOL 2015. [DOI: 10.1080/01496395.2015.1038393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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26
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Yamada E, Inamori M, Watanabe S, Sato T, Tagri M, Uchida E, Tanida E, Izumi M, Takeshita K, Fujisawa N, Komatsu K, Hamanaka J, Kanesaki A, Matsuhashi N, Nakajima A. Constipation is not associated with colonic diverticula: a multicenter study in Japan. Neurogastroenterol Motil 2015; 27:333-8. [PMID: 25469640 DOI: 10.1111/nmo.12478] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Accepted: 11/01/2014] [Indexed: 01/06/2023]
Abstract
BACKGROUND The association of diverticula with bowel habits is unclear. We therefore analyzed the association between diverticula and bowel habits in over 1000 Japanese individuals. METHODS Japanese subjects who underwent total colonoscopies at seven centers in Japan from June to September 2013 were analyzed. Bowel habits were evaluated using the Gastrointestinal Symptom Rating Scale, and stool form was assessed using a part of the Bristol Scale and Rome ΙΙΙ criteria. Diverticula were diagnosed by colonoscopy with a transparent soft-short hood. KEY RESULTS The study evaluated 1066 subjects, 648 males and 418 females (ratio, 1.55 : 1), of mean age 63.9 ± 13.0 years. After adjusting for age and sex, the presence of constipation was associated with a significantly reduced likelihood of diverticula (odds ratio [OR] = 0.70, 95% confidence interval [CI] 0.52-0.93). When assessed according to the location of diverticula, the presence of constipation was associated with a significantly decreased likelihood of left-sided (OR = 0.39, 95% CI 0.16-0.93), but not right-sided (OR = 1.10, 95% CI 0.48-2.53), diverticula. Furthermore, stool form was unrelated with the presence or absence of diverticula. CONCLUSIONS & INFERENCES The wide-spread hypothesis that constipation was associated with colonic diverticula was not supported. Rather, we found that the absence of diverticula was associated with constipation, suggesting the need to reassess the etiology of colonic diverticula.
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Affiliation(s)
- E Yamada
- Gastroenterology Division, Saiseikai Yokohama-shi Nanbu Hospital, Yokohama, Japan
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Taguchi K, Yamasaki K, Maesaki H, Tokuno M, Okazaki S, Moriuchi H, Takeshita K, Otagiri M, Seo H. An evaluation of novel biological activity in a crude extract from Hemerocallis fulva L. var. sempervirens M. Hotta. Nat Prod Res 2014; 28:2211-3. [DOI: 10.1080/14786419.2014.919285] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Kazuaki Taguchi
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto 862-0082, Japan
| | - Keishi Yamasaki
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto 862-0082, Japan
- DDS Research Institute, Sojo University, 4-22-1 Ikeda, Kumamoto 862-0082, Japan
| | - Hiroki Maesaki
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto 862-0082, Japan
| | - Masahiro Tokuno
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto 862-0082, Japan
| | - Shoko Okazaki
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto 862-0082, Japan
| | - Hiroshi Moriuchi
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto 862-0082, Japan
| | - Keizo Takeshita
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto 862-0082, Japan
- DDS Research Institute, Sojo University, 4-22-1 Ikeda, Kumamoto 862-0082, Japan
| | - Masaki Otagiri
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto 862-0082, Japan
- DDS Research Institute, Sojo University, 4-22-1 Ikeda, Kumamoto 862-0082, Japan
| | - Hakaru Seo
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto 862-0082, Japan
- DDS Research Institute, Sojo University, 4-22-1 Ikeda, Kumamoto 862-0082, Japan
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Okazaki S, Tachibana Y, Koga-Ogawa Y, Takeshita K. Redox evaluation in sepsis model mice by the in vivo ESR technique using acyl-protected hydroxylamine. Free Radic Biol Med 2014; 68:72-9. [PMID: 24296247 DOI: 10.1016/j.freeradbiomed.2013.11.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Revised: 11/11/2013] [Accepted: 11/12/2013] [Indexed: 12/22/2022]
Abstract
In vivo electron spin resonance (ESR) spectroscopy is a noninvasive technique that measures the oxidative stress in living experimental animals. The rate of decay of the ESR signal right after an injection of nitroxyl radical has been measured to evaluate the oxidative stress in animals, although the probe's disposition could also affect this rate. Because the amount of probes forming the redox pair of hydroxyl amine and its corresponding nitroxyl radical was shown to be nearly constant in most organs or tissues 10min after the injection of 1-acetoxy-3-carbamoyl-2,2,5,5-tetramethylpyrrolidine (ACP) in mice, we evaluated the oxidative stress in sepsis model mice induced by lipopolysaccharide (LPS) by intravenously injecting ACP as a precursor of redox probes. The in vivo ESR signal increased up to 7-8min after the ACP injection and then decreased. Decay of the in vivo signal in LPS-treated mice was significantly slower than that in healthy mice, whereas no significant difference was observed in the rate of change in the total amount of redox probes in the blood and liver between these groups. ESR imaging showed that the in vivo signals observed at the chest and upper abdomen decayed slowly in LPS-treated mice. Suppression of the decay in LPS-treated mice was canceled by the administration of a combination of pegylated superoxide dismutase and catalase, or an inhibitor of nitric oxide synthase, or gadolinium chloride. These results indicate that the LPS-treated mouse is under oxidative stress and that reactive oxygen species, such as superoxide and peroxynitrite, related to macrophages are mainly involved in the oxidative stress.
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Affiliation(s)
- Shoko Okazaki
- Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan
| | - Yoko Tachibana
- Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan
| | - Yukari Koga-Ogawa
- Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan
| | - Keizo Takeshita
- Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan; National Institute of Radiological Sciences, Chiba 263-8555, Japan.
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Seichi A, Nakajima S, Kitagawa T, Takeshita K, Iwasaki M, Kawaguchi H, Oda H, Nakamura K. Image-guided surgery for cervical disorders in rheumatoid arthritis. Mod Rheumatol 2014; 12:329-32. [DOI: 10.3109/s101650200058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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31
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Tanida H, Fukuda K, Murayama H, Orikasa Y, Arai H, Uchimoto Y, Matsubara E, Uruga T, Takeshita K, Takahashi S, Sano M, Aoyagi H, Watanabe A, Nariyama N, Ohashi H, Yumoto H, Koyama T, Senba Y, Takeuchi T, Furukawa Y, Ohata T, Matsushita T, Ishizawa Y, Kudo T, Kimura H, Yamazaki H, Tanaka T, Bizen T, Seike T, Goto S, Ohno H, Takata M, Kitamura H, Ishikawa T, Ohta T, Ogumi Z. RISING beamline (BL28XU) for rechargeable battery analysis. J Synchrotron Radiat 2014; 21:268-72. [PMID: 24365948 PMCID: PMC3874024 DOI: 10.1107/s1600577513025733] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Accepted: 09/17/2013] [Indexed: 06/03/2023]
Abstract
The newly installed BL28XU beamline at SPring-8 is dedicated to in situ structural and electronic analysis of rechargeable batteries. It supports the time range (1 ms to 100 s) and spatial range (1 µm to 1 mm) needed for battery analysis. Electrochemical apparatus for battery charging and discharging are available in experimental hutches and in a preparation room. Battery analysis can be carried out efficiently and effectively using X-ray diffraction, X-ray absorption fine-structure analysis and hard X-ray photoelectron spectroscopy. Here, the design and performance of the beamline are described, and preliminary results are presented.
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Affiliation(s)
| | | | | | | | | | | | | | | | - K. Takeshita
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - S. Takahashi
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | | | | | | | - N. Nariyama
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - H. Ohashi
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | | | | | | | | | - Y. Furukawa
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - T. Ohata
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | | | | | - T. Kudo
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - H. Kimura
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | | | - T. Tanaka
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - T. Bizen
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - T. Seike
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - S. Goto
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | | | - M. Takata
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - H. Kitamura
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - T. Ishikawa
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - T. Ohta
- Ritsumeikan University, Japan
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32
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Hayashi M, Kaneko S, Shimano M, Ohashi T, Kubota R, Takeshita K, Shinoda M, Inden Y, Kanayama H, Murohara T. Efficacy and safety of radiofrequency catheter ablation for atrial fibrillation in chronic hemodialysis patients. Nephrol Dial Transplant 2013; 29:160-7. [DOI: 10.1093/ndt/gft233] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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33
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Hirashiki A, Kondo T, Adachi S, Shimizu S, Shimazu S, Kono Y, Yamada S, Okumura T, Takeshita K, Murohara T. Clinical safety and usefulness of cardiopulmonary exercise testing for pulmonary hypertension. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p3383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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34
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Shimizu S, Okumura T, Morimoto R, Shimazu S, Yamada T, Kono Y, Takeshita K, Kureishi-Bando Y, Yamada S, Murohara T. Relation between myocardial contractile reserve and exercise capacity in prognosis of non-ischemic dilated cardiomyopathy. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p2962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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35
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Morimoto R, Okumura T, Shimizu S, Shimazu S, Yamada T, Hirashiki A, Takeshita K, Bando Y, Kondo T, Murohara T. Impaired force-frequency relation pattern as a novel prognostic predictor in patients with hypertrophic cardiomyopathy. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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36
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Takeshita K, Okazaki S, Itoda A. Nitroxyl Radicals Remarkably Enhanced the Superoxide Anion Radical-Induced Chemiluminescence of Cypridina Luciferin Analogues. Anal Chem 2013; 85:6833-9. [DOI: 10.1021/ac401002v] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Keizo Takeshita
- Laboratory
of Analytical Chemistry, Faculty of Pharmaceutical
Sciences, Sojo University, 4-22-1 Ikeda,
Nishi-ku, Kumamoto 860-0082, Japan
| | - Shoko Okazaki
- Laboratory
of Analytical Chemistry, Faculty of Pharmaceutical
Sciences, Sojo University, 4-22-1 Ikeda,
Nishi-ku, Kumamoto 860-0082, Japan
| | - Akiko Itoda
- Laboratory
of Analytical Chemistry, Faculty of Pharmaceutical
Sciences, Sojo University, 4-22-1 Ikeda,
Nishi-ku, Kumamoto 860-0082, Japan
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Tsuji T, Uruga T, Nitta K, Kawamura N, Mizumaki M, Suzuki M, Sekizawa O, Ishiguro N, Tada M, Ohashi H, Yamazaki H, Yumoto H, Koyama T, Senba Y, Takeuchi T, Terada Y, Nariyama N, Takeshita K, Fujiwara A, Goto S, Yamamoto M, Takata M, Ishikawa T. Development of Fast Scanning Microscopic XAFS Measurement System. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/430/1/012019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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38
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Sekizawa O, Uruga T, Tada M, Nitta K, Kato K, Tanida H, Takeshita K, Takahashi S, Sano M, Aoyagi H, Watanabe A, Nariyama N, Ohashi H, Yumoto H, Koyama T, Senba Y, Takeuchi T, Furukawa Y, Ohata T, Matsushita T, Ishizawa Y, Kudo T, Kimura H, Yamazaki H, Tanaka T, Bizen T, Seike T, Goto S, Ohno H, Takata M, Kitamura H, Ishikawa T, Yokoyama T, Iwasawa Y. New XAFS beamline for structural and electronic dynamics of nanoparticle catalysts in fuel cells under operating conditions. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/430/1/012020] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Yamaguchi T, Matsumoto S, Masumizu T, Takechi S, Ishida T, Takeshita K, Kansui H, Kunieda T. Generation of radical species from dihydropyrazines having DNA strand-breakage activity and other characteristics. Chem Pharm Bull (Tokyo) 2012; 60:639-46. [PMID: 22689402 DOI: 10.1248/cpb.60.639] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The various biological activity of dihydropyrazines(DHPs)due to the radical generation potency has been described in previous papers. Detailed data about radical species generating be mentioned here. The electron spin resonance (ESR) spin-trapping technique revealed that DHPs generate free radical species such as ·OH, ·OOH, ·CHR(2) and ·CR(3). Oxygen radicals and two carbon-centered radicals were detected as adducts of the spin traps DMPO and DBNBS, respectively. All the 5,5-dimethyl-1-pyrroline-N-oxide (DMPO)- and 3,5-dibromo-4-nitrosobenzenesulfonate (DBNBS)-adducts of compounds DHP-1-8 exhibited approximately the same signal patterns, with various levels of intensity depending on the substituent of the dihydropyrazine ring. The ESR signal intensity of DHPs also increased remarkably upon addition of Cu(2+), resulting that the effects of DHPs were enhanced.
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Takeshita K, Watanabe A, Kutomi K, Haruyama T, Yamamoto A, Furui S, Sano K. Three-dimensional images of liver tumours reconstructed by Gd-EOB-DTPA-enhanced MRI. Br J Radiol 2012; 85:e953-6. [PMID: 22553299 DOI: 10.1259/bjr/39943503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The purpose of this study was to evaluate three-dimensional images of liver tumours obtained with gadolinium ethoxybenzyl diethylenetriamine penta-acetic acid (Gd-EOB-DTPA)-enhanced MRI (3D-EOB-MRI) in hepatic surgery. We conclude that 3D-EOB-MRI may be an alternative method for depicting liver tumours adjacent to the hepatic veins and portal branches, and may provide additional information for surgical planning.
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Affiliation(s)
- K Takeshita
- Department of Radiology, Teikyo University School of Medicine, Tokyo, Japan.
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Iohara D, Hiratsuka M, Hirayama F, Takeshita K, Motoyama K, Arima H, Uekama K. Evaluation of photodynamic activity of C60/2-hydroxypropyl-β-cyclodextrin nanoparticles. J Pharm Sci 2012; 101:3390-7. [PMID: 22228093 DOI: 10.1002/jps.23045] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2011] [Revised: 10/13/2011] [Accepted: 12/14/2011] [Indexed: 11/07/2022]
Abstract
The objective of this study is to evaluate the ability of C(60)/2-hydroxypropyl-β-cyclodextrin (HP-β-CyD) naonparticles to generate reactive oxygen species (ROS) and to induce cell toxicity by the photoirradiation. C(60) nanoparticles were prepared by cogrinding with HP-β-CyD for 3 h at 4°C under reduced pressure. The photodynamic activity of C(60)/HP-β-CyD nanoparticles was evaluated by spectroscopic methods, including the electron spin resonance spin-trapping method, and by the cell viability test using Hela cells. C(60)/HP-β-CyD nanoparticles efficiently generated not only superoxide anion radical (O(2)(·-)) and hydroxyl radical (·OH), but also singlet oxygen ((1)O(2)) through photoirradiation. The ROS generation was enhanced by decreasing the mean particle diameter of C(60) nanoparticles, and the particle size smaller than 90 nm showed a high generation of ·OH and (1)O(2). In addition, HP-β-CyD enhanced the generation of (1)O(2), compared with polyvinylpyrrolidone (an effective solubillizer for C(60)), due to partial disposition of C(60) in the hydrophobic CyD cavity. Furthermore, C(60) /HP-β-CyD nanoparticles showed cell toxicity after the light irradiation, but no toxicity was observed without the light irradiation. Therefore, HP-β-CyD is useful for the preparation of stable C(60) nanoparticles with high ROS generation ability, and C(60)/HP-β-CyD nanoparticles are a promising photosensitizer for photodynamic therapy.
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Affiliation(s)
- Daisuke Iohara
- Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan
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42
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Takeshita K, Kinoshita S, Okazaki S. Simple Method for Quantification of Gadolinium Magnetic Resonance Imaging Contrast Agents Using ESR Spectroscopy. Chem Pharm Bull (Tokyo) 2012; 60:31-6. [DOI: 10.1248/cpb.60.31] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Keizo Takeshita
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
| | - Shota Kinoshita
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
| | - Shoko Okazaki
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
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Takeshita K, Suetake I, Yamashita E, Suga M, Narita H, Nakagawa A, Tajima S. Structural insight into maintenance methylation by mouse DNA methyltransferase 1. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311092865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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44
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Utsumi H, Takeshita K, Miura Y, Masuda S, Hamada A. In vivoEPR Measurement of Radical Reaction in Whole Mice – Influence of Inspired Oxygen and Ischemia–Reperfusion Injury on Nitroxide Reduction. ACTA ACUST UNITED AC 2011. [DOI: 10.3109/10715769309056s219] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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45
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Takeshita K, Okazaki S, Kansui H. Effect of Cholesterol on Distribution of Stable, Hydrophobic Perchlorotriphenylmethyl Triethylester Radical Incorporated in Lecithin Liposomal Membranes. Chem Pharm Bull (Tokyo) 2011; 59:624-8. [DOI: 10.1248/cpb.59.624] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Keizo Takeshita
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
| | - Shoko Okazaki
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
| | - Hisao Kansui
- Laboratory of Organic Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
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46
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Takeshita K, Kutomi K, Haruyama T, Watanabe A, Furui S, Fukushima J, Asano T. Imaging of early pancreatic cancer on multidetector row helical computed tomography. Br J Radiol 2010; 83:823-30. [PMID: 20442278 DOI: 10.1259/bjr/80905803] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Early pancreatic cancer is small and limited to the pancreas. In contrast, small pancreatic cancer may include peripancreatic vasculature or metastasis involvement. This study evaluates images of early pancreatic cancer on multidetector CT (MDCT) using contrast-enhanced multiphasic imaging, and post-processed pancreatic duct images. CT findings and pathological features were analysed in eight patients with early pancreatic cancer. Pathological evaluation included location, size and histological grading of the tumour. MDCT evaluation covered the maximum diameter of the main pancreatic duct (MPD), stenosis or obstruction of the MPD, loss of normal lobar texture and associated pancreatitis. Attenuation differences between normal pancreatic parenchyma and the tumour (AD-PT) were also measured. Focal stenosis or obstruction of the MPD with dilatation of the distal MPD was demonstrated in all patients. Associated pancreatitis occurred in six patients with tumours measuring 12 mm or greater. Loss of normal lobar texture was recognised in four cases with the tumour measuring 14 mm or greater. Statistically, low-attenuated lesions and high-attenuated lesions differed with respect to the tumour size (p<0.01), and a positive relationship was demonstrated between the tumour size and AD-PT (r = 0.84). In seven cases, AD-PT is higher during the arterial phase than the pancreatic phase. Early pancreatic cancer appears as low attenuation on early phase, and as high- to iso-attenuation during the pancreatic and delayed phases in respect to the tumour size. Focal stenosis or obstruction of the MPD with dilatation of the distal MPD observed on curved reformation imaging seems important in the diagnosis of early pancreatic cancer.
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Affiliation(s)
- K Takeshita
- Departments of Radiology, Teikyo University School of Medicine, 2-11-1, Itabashi-Ku, Tokyo 173-8605, Japan.
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47
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Takeshita K, Kawaguchi K, Fujii-Aikawa K, Ueno M, Okazaki S, Ono M, Krishna MC, Kuppusamy P, Ozawa T, Ikota N. Heterogeneity of regional redox status and relation of the redox status to oxygenation in a tumor model, evaluated using electron paramagnetic resonance imaging. Cancer Res 2010; 70:4133-40. [PMID: 20442282 DOI: 10.1158/0008-5472.can-09-4369] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
It is widely accepted that redox status, along with the partial pressure of oxygen (pO(2)), determines the efficacy of some therapeutic methods applied to treat tumors, including radiation. Redox status, evaluated by the reduction of a nitroxyl probe, was reportedly heterogeneous in a mouse tumor model. However, neither variation of heterogeneity of the redox status among mice nor the relation of the redox status to pO(2) in tumors has been characterized sufficiently. In this study, the regional reduction status in a mouse radiation-induced fibrosarcoma tumor model was evaluated using sequential three-dimensional electron paramagnetic resonance (EPR) imaging after i.v. injection of a tissue-permeable nitroxyl probe, HM-PROXYL. The regional decay of HM-PROXYL signal obeyed first-order kinetics, and the amplitude of the reduction rate and extent of its heterogeneity in a tumor varied among six mice. The tissue pO(2) was measured using EPR oximetry with lithium phthalocyanine (LiPc) microcrystals implanted within the tumor. The location of LiPc was determined with EPR imaging. A sequential image was obtained following the injection of HM-PROXYL, even after LiPc implantation, by choosing an HM-PROXYL signal peak which does not overlap with the signal of LiPc. The relationship between pO(2) and the reduction rate at the region of pO(2) measurement was found to be low (r = 0.357) in 13 tumor-bearing mice, indicating that the extent of oxygenation does not necessarily affect the redox status under air-breathing conditions. The results strongly indicate the necessity of measurements of both redox status and oxygenation in every tumor to characterize tumor physiology.
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Affiliation(s)
- Keizo Takeshita
- Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto, Japan.
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48
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Takeshita K. [Comments from the NPO activities for the child neurologists]. No To Hattatsu 2010; 42:108-111. [PMID: 23858592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
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Maruyama T, Takeshita K, Kitagawa T, Nakao Y. Does bracing affect the quality of life of the patients with idiopathic scoliosis? Re-analysis of Cobb angle-matched subjects. Scoliosis 2009. [PMCID: PMC2793501 DOI: 10.1186/1748-7161-4-s2-o70] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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50
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