Mitogenic effect of sodium phenobarbital and rat liver arginase activity

1969 ◽  
Vol 25 (6) ◽  
pp. 599-600 ◽  
Author(s):  
I. Japundžić ◽  
Ž. Čupić ◽  
M. Japundžić ◽  
B. Knežević
Keyword(s):  
Rat Liver ◽  
Arginase Activity ◽  
Mitogenic Effect ◽  
Sodium Phenobarbital

Mitogenic effect of retinoid X receptor agonists in rat liver

1997 ◽  
Vol 54 (4) ◽  
pp. 517-524 ◽  
Author(s):  
Andrew M. Standeven ◽  
Maria Escobar ◽  
Richard L. Beard ◽  
Yang-Dar Yuan ◽  
Roshantha A.S. Chandraratna
Keyword(s):  
Rat Liver ◽  
Retinoid X Receptor ◽  
Mitogenic Effect ◽  
Receptor Agonists

scholarly journals Hepatic zonation of the catabolism of arginine and ornithine in the perfused rat liver

1998 ◽  
Vol 330 (2) ◽  
pp. 627-632 ◽  
Author(s):  
Dan O'SULLIVAN ◽  
T. John BROSNAN ◽  
E. Margaret BROSNAN
Keyword(s):  
Amino Acids ◽  
Rat Liver ◽  
Hepatic Vein ◽  
Small Population ◽  
Arginase Activity ◽  
Perfused Rat Liver ◽  
Ornithine Aminotransferase ◽  
Arginine Catabolism ◽  
14Co2 Production

The metabolism of 14C-labelled arginine and ornithine was studied in the isolated, nonrecirculating, perfused rat liver. The catabolism of these amino acids required ornithine aminotransferase since treatment of rats with gabaculine, an inhibitor of this enzyme, decreased substantially the production of 14CO2 from the 14C-labelled amino acids. In the liver, ornithine aminotransferase is restricted to a small population of hepatocytes proximal to the terminal hepatic vein [Kuo, F. C., Hwu, W. L., Valle, D. and Darnell Jr., J. E. (1991) Proc. Natl. Acad. Sci. U.S.A. 88, 9468-9472], i.e. the perivenous subpopulation of hepatocytes. Catabolism of arginine requires arginase to convert arginine to ornithine which can then be catabolized through ornithine aminotransferase. The presence of arginase activity in the perivenous hepatocytes was demonstrated by experiments in which livers were perfused with [14C]arginine in both antegrade and retrograde directions. Identical rates of 14CO2 production were obtained in these experiments, a result which could only occur if the process of arginine catabolism through ornithine aminotransferase can be carried out in its entirety in the perivenous cells.

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