Tag Archives: aminotransferases

Intermittent fasting causes metabolic stress and leucopenia in young mice

O. M. Sorochynska1, M. M. Bayliak1, Y. V. Vasylyk1,
O. V. Kuzniak1, I. Z. Drohomyretska1, A. Ya. Klonovskyi1,
J. M. Storey2, K. B. Storey2, V. I. Lushchak1

1Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine;
2Institute of Biochemistry, Carleton University, Ottawa, Canada;
e-mail: lushchak@pu.if.ua

Received: 29 October 2018; Accepted: 13 December 2018

Overweight and obesity became the worldwide epidemic resulting from overeating especially when a so-called Western diet rich in carbohydrates and fats is used. It is widely accepted that limitation of food consumption could help to withstand such state of adult organism, but information about younger groups is contradictory. The present study was undertaken to characterize the effects of intermittent fasting, using an every other day (EOD) fasting/feeding protocol, on hematological parameters and biochemical blood plasma indices in young mice from one to two months old. It was shown that intermittently fasted mice were characterized by a reduced body weight, reduced total number of blood leucocytes, lower glucose and lactate levels and higher activity of alanine aminotransferase and aspartate aminotransferase in blood plasma as compared with the age-matched control mice. To gain the same mass EOD animals needed to eat more food than ad libitum fed animals. These differences may probably be explained by a need to expend certain resources to combat stress induced by intermittent fasting. Our data showed that EOD feeding at a young age may negatively influence young mammals.

Carbohydrate and nitrogenous metabolism condition in the rat tissue under experimental rhabdomyolysis

P. A. Kaliman, S. M. Okhrimenko

Karazin Kharkiv National University, Ukraine;
e-mail: s.okhrimenko@mail.ru

Some effects of glycerol injection on indices of the condition of the thiol-disulfide system as well as carbohydrate and nitrogen metabolism in rats in vivo were studied. A decrease was revealed in levels of non-protein SH-groups in the liver, kidney and heart, as well as of protein SH-groups in the kidney and heart of rats following glycerol injection. That might be connected with SH-group oxidation under the excessive arrival of free haem into tissues under rhabdomyolysis. A decrease in glycogen and  increase in tyrosine aminotransferase activity in the liver were observed. Activation of nitrogenous metabolism following glycerol injection is indicated by the increase of aminotransferase activity in organs, and concentration of blood urea. High concentration of creatinine in the rat serum can reflect malfiltration in kidneys.

Investigation of tomato (Solanum lycopersicum) aminotransferases involved in biosynthesis of branched-chain-amino-acids

A. S. Kochevenko1,2, A. R. Fernie2

1Institute of Cell Biology and Genetic Engineering, National Academy of Sciences of Ukraine, Kyiv;
2Max Planck Institute of Molecular Plant Physiology, Golm, Germany;
e-mail: andkochevenko@gmail.com

This study presents evidence for the role of ВСАТ3 and ВСАТ4 proteins in the synthesis of branched-chain-amino-acids in tomato Solanum lycopersicum. ВСАТ3 and ВСАТ4 genes were located­ on tomato chromosomal map by RFLP method (restriction fragment length polymorphism). Using confocal microscopy it was shown that BCAT3-GFP and BCAT4-GFP fusion proteins were localised in chloroplasts. It was observed that these aminotransferase isoforms exhibited distinct kinetic­ properties and a differential expression pattern of mRNA levels in various tomato tissues.