scholarly journals Acceleration of gluconeogenesis from lactate by lysine (Short Communication)

1973 ◽  
Vol 134 (2) ◽  
pp. 671-672 ◽  
Author(s):  
Neal W. Cornell ◽  
Patricia Lund ◽  
Reginald Hems ◽  
Hans A. Krebs
Keyword(s):  
Amino Acid ◽  
Cyclic Amp ◽  
Short Communication ◽  
Liver Cells ◽  
Dibutyryl Cyclic Amp ◽  
Isolated Liver Cells ◽  
Isolated Liver

l-Lysine (2mm) causes an increase (mean 60%) in the rate of gluconeogenesis from lactate in isolated liver cells. The effect is of a catalytic nature. No other amino acid has the same effect, though ornithine is slightly active. The effect is additional to the stimulatory effects of oleate and of dibutyryl cyclic AMP.

Decreased glucagon-stimulated cyclic AMP production by isolated liver cells of rats with type 2 diabetes

1983 ◽  
Vol 32 (1) ◽  
pp. 13-26 ◽  
Author(s):  
Bernard Portha ◽  
Hilda Chamras ◽  
Yvonne Broer ◽  
Luc Picon ◽  
Gabriel Rosselin
Keyword(s):  
Type 2 Diabetes ◽  
Cyclic Amp ◽  
Liver Cells ◽  
Isolated Liver Cells ◽  
Isolated Liver

scholarly journals The role of insulin in the modulation of glucagon-dependent control of phenylalanine hydroxylation in isolated liver cells

1987 ◽  
Vol 242 (3) ◽  
pp. 655-660 ◽  
Author(s):  
M J Fisher ◽  
A J Dickson ◽  
C I Pogson
Keyword(s):  
Cyclic Amp ◽  
Insulin Action ◽  
Phenylalanine Hydroxylase ◽  
Liver Cells ◽  
Phosphorylation State ◽  
Isolated Liver Cells ◽  
The Impact ◽  
Isolated Liver ◽  
Stimulation Of

The stimulation of phenylalanine hydroxylation in isolated liver cells by sub-maximally effective concentrations of glucagon (less than 0.1 microM) is antagonized by insulin (0.1 nM-0.1 microM). This phenomenon is a consequence of a decrease in the glucagon-stimulated phosphorylation of phenylalanine hydroxylase from liver cells incubated in the presence of insulin. The impact of insulin on the phosphorylation state and activity of the hydroxylase is mimicked by incubation of liver cells in the presence of orthovanadate (10 microM). A series of cyclic AMP and cyclic GMP analogues enhanced phenylalanine hydroxylation: in each case insulin diminished the stimulation of flux. These results are discussed in the light of the characteristics of insulin action on other metabolic processes.

scholarly journals Leucine and tryptophan metabolism in rats

1985 ◽  
Vol 225 (2) ◽  
pp. 277-281 ◽  
Author(s):  
M Salter ◽  
D A Bender ◽  
C I Pogson
Keyword(s):  
Amino Acid ◽  
Membrane Transport ◽  
Liver Cells ◽  
Tryptophan Metabolism ◽  
Extreme Conditions ◽  
Isolated Liver Cells ◽  
Tryptophan Oxidation ◽  
Isolated Liver ◽  
Tryptophan Uptake

The rate of tryptophan metabolism in isolated liver cells from animals fed on a high-leucine diet was greater than for cells from control animals. Leucine inhibited tryptophan metabolism and tryptophan uptake in isolated liver cells, probably by competing for membrane transport. Leucine had no effect on tryptophan 2,3-dioxygenase in vitro. 4-Methyl-2-oxovalerate increased tryptophan oxidation in incubations containing albumin, by displacing bound tryptophan and increasing the availability of the amino acid to the cell. The results suggest that, under extreme conditions, when the availability of tryptophan is low, leucine may be pellagragenic.

scholarly journals Arachidonic acid synthesis studied in isolated liver cells

FEBS Letters ◽  
1981 ◽  
Vol 133 (2) ◽  
pp. 201-204 ◽  
Author(s):  
B.O. Christophersen ◽  
Jon Norseth
Keyword(s):  
Arachidonic Acid ◽  
Acid Synthesis ◽  
Liver Cells ◽  
Isolated Liver Cells ◽  
Isolated Liver

scholarly journals Amylase in Isolated Liver Cells

1960 ◽  
Vol 235 (5) ◽  
pp. 1354-1358
Author(s):  
Robert L. McGeachin ◽  
Betty Ann Potter
Keyword(s):  
Liver Cells ◽  
Isolated Liver Cells ◽  
Isolated Liver
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