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Formation of black pigment gallstone in a hamster model of experimental cirrhosis

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The relationship between liver cirrhosis and the pathogenesis of black pigment stones has not been clarified. We attempted to induce black pigment stone formation in the gallbladders of hamsters. Male golden hamsters were divided into a cirrhosis group and a control group. Liver cirrhosis was induced by administering drinking water containing thioacetamide. The control group was given tap water. Gallstones at 48 weeks after treatment were examined by stereoscopic microscopy and scanning electron microscopy. The copper content of the black pigment stones was analysed by atomic absorption spectrophotometry. Black pigment stones in the gallbladder were detected in 25% of the cirrhosis group. Their surface and cross-section appeared amorphous. Black pigment stones contained copper. We confirmed the formation of gallstones in an animal model of cirrhosis by thioacetamide. Our findings may contribute to the clarification of the relationship between the pathogenesis of black pigment stones and the pathophysiology of liver cirrhosis.
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Keywords: Black pigment stone; gallbladder; hamster; liver cirrhosis

Document Type: Commentary

Affiliations: Second Department of Medicine, Kurume University School of Medicine, Kurume, Japan

Publication date: 1997-10-01

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