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Tani Y, Kamai Y, Yamate K, Mizuno H, Yamamoto H, Hosokawa T, Doi K. Restitutive response of Mini rat liver to injury induced by a single oral administration of thioacetamide. J Toxicol Sci 2001; 26:25-37. [PMID: 11255791 DOI: 10.2131/jts.26.25] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Mini rats are a transgenic rat strain carrying antisense gene for rat growth hormone (GH), resulting in retarded growth and a lower blood GH level (136 +/- 42.0 ng/mL) compared with that of age-matched parental strain Wistar rats (329 +/- 337 ng/mL). Mini rats have been used by several investigators as a GH deficiency model. In this work, we gave a single oral administration of thioacetamide (TAA), a hepatotoxicant, to both Mini rats and Wistar rats to ascertain the influence of GH deficiency on liver response to chemically induced injury and subsequent regeneration. TAA administration caused liver injury in both strains, with a greater extent of injury in Mini rats. Proliferation of bile epithelial cells and so-called oval cells was prominent at Day 3 in Mini rats only, and this change correlated well with serum total bilirubin concentrations. Antibody against Ki-67 antigen revealed that cellular proliferation after TAA-induced liver injury was suppressed but prolonged in the Mini rat liver. Although hepatic stellate cells and Kupffer cells/macrophages were more abundant in the livers of TAA-treated Mini rats, the hepatic expression patterns of hepatocyte growth factor and transforming growth factor beta 1 were comparable to those of Wistar rats. Insulin-like growth factor-I gene expression was significantly reduced in the Mini rat liver. Our results imply that a lower GH level may exacerbate chemically induced liver injury, enhance infiltration/proliferation of non-parenchymal cells, suppress regeneration of hepatocytes, and induce proliferation of bile epithelial cells and oval cells when the liver is injured by TAA.
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Affiliation(s)
- Y Tani
- Medicinal Safety Research Laboratories, Sankyo Co., Ltd., 1-2-58 Hiromachi, Shinagawa-ku, Tokyo 140-8710, Japan
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Teranishi M, Sato S, Tani Y, Yamamoto H, Makino T, Tanaka K, Sehata S, Ogata S, Watanabe M, Igarashi I, Maeda N, Matsumoto E, Yamoto T, Takaoka M, Fukushige J, Endo K, Hosokawa T, Manabe S. Comparison of Bone Changes between Neonatally Monosodium Glutamate-Treated Rats and Mini Rats. J Toxicol Pathol 1999. [DOI: 10.1293/tox.12.183] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Munehiro Teranishi
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
- Pathology Group II, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Satoko Sato
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Yoshiro Tani
- Pathology Group II, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Hideki Yamamoto
- Pathology Group II, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Toshihiko Makino
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Kohji Tanaka
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Shinya Sehata
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Seiya Ogata
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Mayumi Watanabe
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Isao Igarashi
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Naoyuki Maeda
- Pathology Group II, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Etsuji Matsumoto
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Takashi Yamoto
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Masaya Takaoka
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Junichiro Fukushige
- Pathology Group II, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Kazuo Endo
- Pathology Group II, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Tsunemichi Hosokawa
- Pathology Group II, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Sunao Manabe
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
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3
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Teranishi M, Sato S, Tani Y, Yamamoto H, Makino T, Tanaka K, Sehata S, Ogata S, Watanabe M, Maeda N, Matsumoto E, Yamoto T, Takaoka M, Fukushige J, Endo K, Hosokawa T, Manabe S. Effects of Growth Hormone on Bone in Mini Rats. J Toxicol Pathol 1999. [DOI: 10.1293/tox.12.191] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Munehiro Teranishi
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
- Pathology Group II, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Satoko Sato
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Yoshiro Tani
- Pathology Group II, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Hideki Yamamoto
- Pathology Group II, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Toshihiko Makino
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Kohji Tanaka
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Shinya Sehata
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Seiya Ogata
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Mayumi Watanabe
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Naoyuki Maeda
- Pathology Group II, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Etsuji Matsumoto
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Takashi Yamoto
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Masaya Takaoka
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Junichiro Fukushige
- Pathology Group II, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Kazuo Endo
- Pathology Group II, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Tsunemichi Hosokawa
- Pathology Group II, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
| | - Sunao Manabe
- Pathology Group I, Laboratory Animal Science and Toxicology Laboratories, Sankyo Co., Ltd
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