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Hitomi M, Akizawa F, Kondo S, Dogishi K, Fujiwara S, Kimoto H, Moroki T. Four-week repeated oral dose toxicity study of zinc maltol in rats. Food Chem Toxicol 2023; 175:113755. [PMID: 36997052 DOI: 10.1016/j.fct.2023.113755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 03/07/2023] [Accepted: 03/27/2023] [Indexed: 03/30/2023]
Abstract
Zinc (Zn) is one of the trace elements, and Zn deficiency causes many adverse effects. Zn complexes are used for Zn supplementation, but there are few toxicity reports. Zn maltol (ZM) was orally administered for 4 weeks to male rats at a dose of 0, 200, 600, or 1000 mg/kg to assess its toxicity. As a ligand group, maltol was administered at a dose of 800 mg/kg/day. General conditions, ophthalmology, hematology, blood biochemistry, urinalysis, organ weights, necropsy, histopathology, and plasma Zn concentration were investigated. Plasma Zn concentration increased with dose levels of ZM. The following toxicities were observed at 1000 mg/kg. Pancreatitis was observed with histopathological lesions and increases in white blood cell parameters and creatine kinase. Anemia was observed with changes in red blood cell parameters and extramedullary hematopoiesis in the spleen. Decreases in the trabecula and growth plate in the femur were observed. On the other hand, no toxicities were observed in the ligand group. In conclusion, these toxicities induced by ZM have been reported as Zn-related toxicities. It was considered that these results will be helpful for a creation and development of new Zn complexes as well as supplements.
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Affiliation(s)
- Masaya Hitomi
- Department of Drug Safety Research, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., 463-10, Kagasuno, Kawauchi-cho, Tokushima, 771-0192, Japan.
| | - Fumika Akizawa
- Department of Drug Safety Research, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., 463-10, Kagasuno, Kawauchi-cho, Tokushima, 771-0192, Japan.
| | - Satoshi Kondo
- Department of Drug Safety Research, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., 463-10, Kagasuno, Kawauchi-cho, Tokushima, 771-0192, Japan.
| | - Koji Dogishi
- Department of Drug Safety Research, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., 463-10, Kagasuno, Kawauchi-cho, Tokushima, 771-0192, Japan.
| | - Sakura Fujiwara
- Department of Drug Safety Research, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., 463-10, Kagasuno, Kawauchi-cho, Tokushima, 771-0192, Japan.
| | - Hiroki Kimoto
- Department of Drug Safety Research, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., 463-10, Kagasuno, Kawauchi-cho, Tokushima, 771-0192, Japan.
| | - Takayasu Moroki
- Department of Drug Safety Research, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., 463-10, Kagasuno, Kawauchi-cho, Tokushima, 771-0192, Japan.
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Isoda K, Kagaya N, Akamatsu S, Hayashi S, Tamesada M, Watanabe A, Kobayashi M, Tagawa YI, Kondoh M, Kawase M, Yagi K. Hepatoprotective Effect of Vitamin B12 on Dimethylnitrosamine-Induced Liver Injury. Biol Pharm Bull 2008; 31:309-11. [DOI: 10.1248/bpb.31.309] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Katsuhiro Isoda
- Graduate School of Pharmaceutical Sciences, Osaka University
| | - Noritaka Kagaya
- Graduate School of Pharmaceutical Sciences, Osaka University
| | | | - Shinji Hayashi
- Graduate School of Pharmaceutical Sciences, Osaka University
| | - Makoto Tamesada
- Graduate School of Pharmaceutical Sciences, Osaka University
| | - Aiko Watanabe
- Research and Development Center, Kobayashi Pharmaceutical Co., Ltd
| | | | - Yoh-ichi Tagawa
- Department of Biomolecular Engineering, Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology
| | - Masuo Kondoh
- Graduate School of Pharmaceutical Sciences, Osaka University
| | - Masaya Kawase
- Faculty of Pharmaceutical Sciences, Osaka-Ohtani University
| | - Kiyohito Yagi
- Graduate School of Pharmaceutical Sciences, Osaka University
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Kagaya N, Kamiyoshi A, Tagawa YI, Akamatsu S, Isoda K, Kawase M, Yagi K. Suppression of cell death in primary rat hepatocytes by alpha1-acid glycoprotein. J Biosci Bioeng 2005; 99:81-3. [PMID: 16233760 DOI: 10.1263/jbb.99.81] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2004] [Accepted: 10/21/2004] [Indexed: 11/17/2022]
Abstract
In screening for effective additives for the long-term culture of hepatocytes, the hepatoprotective effect of alpha1-acid glycoprotein (AGP) was observed. AGP prevented primary hepatocytes from undergoing cell death induced by the chemical toxin, bromobenzene. Moreover, AGP added to medium was found to maintain the number of viable hepatocytes for as long as 6 d. The hepatoprotective effect of AGP was lost by removing sialic acid groups at the N-glycan chain terminal of AGP. It is shown that the complete form of N-glycan chain is needed for the hepatoprotectivity of AGP.
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Affiliation(s)
- Noritaka Kagaya
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan
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