Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0019209 (hepatomegaly)
 5,798 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Liver size, cytochrome P-450 (P-450) concentration in liver biopsy specimens and antipyrine kinetics were studied in 112 consecutive patients undergoing diagnostic liver biopsy. Compared to subjects with normal parenchyma, those with slight or severe parenchymal alterations had enlarged livers with low P-450 concentration and slow antipyrine elimination. In the normal group, the mean P-450 concentration (+/- 1 SD) was 11.10 +/- 2.14 nmol/g liver tissue and the total amount (estimated liver weight g X P-450 concentration nmol/g) 16.06 +/- 3.29 mumol. Previous therapy with enzyme inducing drugs was associated with enlarged liver in subjects with normal histological findings and with fast antipyrine elimination and high P-450 in all groups. Antipyrine elimination rate correlated with liver weight only in subjects with normal parenchyma. The total amount of P-450 was generally more closely related to its concentration than to the estimated liver weight, although in many individual cases a large liver was able to compensate a low P-450 concentration so that the total P-450 was at the normal level. Despite normal or high total P-450, in vivo drug metabolism was impaired in subjects with altered parenchyma, suggesting that other factors were limiting antipyrine elimination in liver disease.
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PMID:Liver size in evaluating drug metabolizing capacity in man. 46 52

Liver size has been estimated clinically and by a non-invasive ultrasound technique in 16 normal subjects, 16 patients with cirrhosis, 10 patients with chronic biliary obstruction, and three patients with primary hepatoma. Antipyrine disposition was also measured in each subject. Hepatomegaly was not clinically detectable until there was approximately a 20% increase in liver size. Additional increases in size correlated significantly with clinical estimates of hepatomegaly. Antipyrine clearance had a three-fold range in normal subjects. Its mean value was significantly reduced in each subgroup of patients with liver disease. However, 48% of patients with liver disease had values within the normal range. In normal subjects there was a significant correlation between antipyrine clearance and liver volume. Thus, intersubject variation in clearance normalised for liver volume was less than clearance alone. Antipyrine clearance normalised for liver volume in patients with liver disease was significantly lower than in normal subjects and there was no overlap with normal subjects. In conclusion, assessment of drug metabolising efficiency per unit volume of liver increased the discrimination in differentiating subjects with normal from abnormal livers.
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PMID:Antipyrine clearance per unit volume liver: an assessment of hepatic function in chronic liver disease. 48 57