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  • Title: Phenobarbitone-induced enlargement of the liver in the rat: its relationship to carbon tetrachloride-induced cirrhosis.
    Author: Chatamra K, Proctor E.
    Journal: Br J Exp Pathol; 1981 Jun; 62(3):283-8. PubMed ID: 7248170.
    Abstract:
    The yield of severe cirrhosis of the liver (defined as a shrunken finely nodular liver with micronodular histology, ascites greater than 30 ml, plasma albumin less than 2.2 g/dl, splenomegaly 2-3 times normal, and testicular atrophy approximately half normal weight) after 12 doses of carbon tetrachloride given intragastrically in the phenobarbitone-primed rat was increased from 25% to 56% by giving the initial "calibrating" dose of carbon tetrachloride at the peak of the phenobarbitone-induced enlargement of the liver. At this point it was assumed that the cytochrome P450/CCl4 toxic state was both maximal and stable. The optimal rat size to begin phenobarbitone was determined as 100 g, and this size as a group had a mean maximum relative liver weight increase 47% greater than normal rats of the same body weight. The optimal time for the initial dose of carbon tetrachloride was after 14 days on phenobarbitone.
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