Human Placental Extract Stimulates Liver Regeneration in Rats
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概要
- 論文の詳細を見る
The effect of human placental extract (HPE) on liver regenaration in rats was investigated. After intravenous administration of HPE to α-naphthylisothiocyanate (ANIT)-intoxicated rats, the labeling index in hepatocytes was significantly increased to a level 16.5 times higher than that of the control. A 1/500 dilution of HPE directly stimulated DNA synthesis of the hepatocytes in primary culture. HPE heated at 121℃ did not stimulate the labeling index in vivo or hepatocyte DNA synthesis in primary culture, suggesting that HPE contains heatunstable but potent mitogens for hepatocytes. HPE contains hepatocyte growth factor (HGF), but the mitogenic effect of HPE cannot be explained by the effect exerted by HGF alone, since both the labeling index in vivo and hepatocellular DNA synthesis in vitro stimulated by HPE were much higher than those stimulated by HGF alone when the applied doses of HGF were set to be almost the same level between each case. When HPE was fractionated on a heparin-sepharose column, the mitogenic effect of HPE was found to be located mainly in the heparin-bound fraction. Hepatocyte DNA synthesis induced by this fraction was enhanced cooperatively by the heparin-unbound fraction, suggesting that there are some modulators in the heparin-unbound fraction which enhance the proliferative activity of the heparin-bound fraction by a synergetic mechanism. Both HPE and heated HPE completely recovered the biochemical marker activity for liver function (glutamic-pyruvic transaminase, GPT;alkaline phosphatase, ALP; lactate dehydrogenase, LAP; γ-glutamyltransferase, γ-GTP activities and the bilirubin concentration) almost to the control level in the serum of ANIT-intoxicated rats, indicating that HPE also contains a heat-stable fraction which repairs liver function.
- 公益社団法人日本薬学会の論文
- 1998-01-15
著者
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KAKU Tai-ichi
Japan Bioproducts Industry Co., Ltd.
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LIU Ke-Xin
Department of Clinical Pharmacology, College of Pharmacy, Dalian Medical University
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Liu Ke-xin
Department Of Clinical Pharmacology College Of Pharmacy Dalian Medical University
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Liu Ke-xin
Japan Bioproducts Industry Co. Ltd.
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Kaku Tai-ichi
Japan Bioproducts Industry Co. Ltd.
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Kato Y
Faculty Of Pharmaceutical Sciences University Of Tokyo
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SUGIYAMA Yuichi
Faculty of Pharmaceutical Sciences, University of Tokyo
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KATO Yukio
Faculty of Pharmaceutical Sciences, Kanazawa University
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Sugiyama Yuichi
Faculty Of Pharmaceutical Sciences University Of Tokyo
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Kato Yukio
Faculty Of Agriculture Meiji University
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Sugiyama Yuichi
Faculty Of Pharmaceutical Sciences The University Of Tokyo
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