Daily and annual variations of the hepatic Glucose 6-phosphate dehydrogenase activity and seasonal changes in the body fats of the gilthead seabreamSparus aurata

2007 ◽  
Vol 307A (9) ◽  
pp. 516-526 ◽  
Author(s):  
Encarnación Gómez-Milán ◽  
Maria José Sánchez-Muros Lozano
Keyword(s):  
Dehydrogenase Activity ◽  
Seasonal Changes ◽  
The Body ◽  
Annual Variations ◽  
Hepatic Glucose ◽  
Glucose 6 Phosphate Dehydrogenase

scholarly journals A critical appraisal of the effect of oxidized glutathione on hepatic glucose 6-phosphate dehydrogenase activity

1983 ◽  
Vol 214 (3) ◽  
pp. 959-965 ◽  
Author(s):  
H R Levy ◽  
M Christoff
Keyword(s):  
Glutathione Reductase ◽  
Dehydrogenase Activity ◽  
Rat Liver ◽  
Critical Appraisal ◽  
Oxidized Glutathione ◽  
Assay Procedure ◽  
Low Concentrations ◽  
Hepatic Glucose ◽  
Spurious Effect ◽  
Glucose 6 Phosphate Dehydrogenase

Experiments were undertaken to elucidate the mechanism of the reversal of NADPH inhibition of rat liver glucose 6-phosphate dehydrogenase by oxidized gluthathione alone and in combination with a putative cofactor described by Eggleston & Krebs [(1974) Biochem. J. 138, 425-435]. Evidence is presented that this reversal is largely an artifact, caused by the incorrect application of a control assay procedure and a spurious effect of Zn2+ (added in order to inhibit glutathione reductase) in crude enzyme solutions. When the proper assay procedure is used and glutathione reductase is inhibited with low concentrations of Hg2+, glutathione addition has no effect on NADPH inhibition of glucose 6-phosphate dehydrogenase. No evidence was found for the existence of a cofactor that mediates an effect of glutathione on glucose 6-phosphate dehydrogenase.

Long-term and season-specific changes in the body concentrations of magnesium, potassium and calcium by means of quantitative analyses of beard samples collected every day: A case study

2019 ◽  
Vol 29 (01n02) ◽  
pp. 43-52
Author(s):  
K. Sera ◽  
S. Goto ◽  
T. Hosokawa ◽  
Y. Saitoh
Keyword(s):  
Seasonal Variations ◽  
Seasonal Changes ◽  
Potassium Concentration ◽  
The Body ◽  
Annual Variations ◽  
Single Person ◽  
Quantitative Analyses ◽  
Long Term Variations

More than 4000 beard samples were collected from a single person every morning over a 12-year period and analyzed using a standard-free method. We detected significant annual variations in the concentrations of magnesium and calcium in the study period, although significant monthly and seasonal variations were not noted. Calcium tends not to be obtained from season-specific foods or drinks, so its variations may be affected by changes in the metabolism of the body. In contrast, however, potassium showed marked long-term variations with significant seasonal differences. As our previous studies confirmed that green vegetables contain large quantities of potassium and that their supply and consumption increase from May to July, the seasonal variations in potassium concentration were attributed to the ingestion of green vegetables. Although magnesium is also contained in green vegetables in large quantities, its principle supply sources are diverse and its concentration did not show any clear seasonal changes.

ACUTE ENZYME HISTOCHEMICAL CHANGES IN THE ZONA GLOMERULOSA OF THE RAT ADRENAL CORTEX

1968 ◽  
Vol 59 (3) ◽  
pp. 508-518
Author(s):  
J. D. Elema ◽  
M. J. Hardonk ◽  
Joh, Koudstaal ◽  
A. Arends
Keyword(s):  
Peritoneal Dialysis ◽  
Succinate Dehydrogenase ◽  
Dehydrogenase Activity ◽  
Adrenal Cortex ◽  
Isocitrate Dehydrogenase ◽  
Hydroxysteroid Dehydrogenase ◽  
Zona Glomerulosa ◽  
Acute Changes ◽  
Glucose 6 Phosphate Dehydrogenase ◽  
Histochemical Changes

ABSTRACT Acute changes in glucose-6-phosphate dehydrogenase and isocitrate dehydrogenase activity in the zona glomerulosa of the rat adrenal cortex were induced by peritoneal dialysis with 5 % glucose. Although less clear, the activity of 3β-ol-hydroxysteroid dehydrogenase also seemed to increase as well. No changes were seen in the activity of succinate dehydrogenase. Dialysis with 0.9 % NaCl had no effect on any of the enzymes investigated. The possible significance of these observations is discussed.

Sign in / Sign up

Export Citation Format

Share Document