Mariusz M Zydowo

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The changes in adenine nucleotide concentration induced by acetate were investigated in rat liver in situ and in isolated rat hepatocytes. Adenosine monophosphate (AMP) concentration increased approximately threefold within 15 minutes after intraperitoneal injection of sodium acetate. A small but significant decrease in adenosine triphosphate (ATP)(More)
The secondary structure and the thermal stability of human liver (L-FABP) and heart (H-FABP) fatty acid-binding proteins were analyzed, in the absence and in the presence of oleic acid, by Fourier transform ir spectroscopy. The study was done in order to gain information on the secondary as well three-dimensional structure of L-FABP and to check the(More)
Some enzyme activities and metabolic features of the black Ma melanotic, brown MI melanotic and Ab amelanotic melanomas of hamster were investigated. The activities of hexokinase and phosphofructokinase were similar in all three melanomas, the activity of NAD-dependent glycerol-3-phosphate dehydrogenase was higher in the amelanotic melanoma and that of(More)
In contrast to cardiac purine metabolism, little is known about pyrimidine catabolism in heart. We therefore investigated uridine and uracil formation in ischemic rat and human hearts. Human donor hearts accumulated uridine 3 x (P < 0.05) before implantation. Hearts released this pyrimidine during implantation or correction of cardiac defects. During the(More)
Mitochondria were isolated from the heart and skeletal muscle of rats treated with three consecutive daily doses of 100 000 i.u. of calciol (cholecalciferol; 'vitamin D3'). On the fourth day after the last dose, cardiac necrosis developed. At that time mitochondria isolated from heart displayed a 10-fold higher Ca2+ content and a 6-fold lower respiratory(More)
1. AMP-deaminase (EC 3.5.4.6) from skeletal muscle of frog and pikeperch was purified to homogeneity and compared with the homogeneous enzymes purified from rat, rabbit and hen skeletal muscle. 2. Their molecular weight was close to 280,000, every enzyme consisted of four identical subunits of molecular weight about 70,000. 3. All enzymes were found to(More)
The influence of ischemia on purine nucleotide and their catabolite concentration in human myocardium was investigated during surgery of acquired and congenital heart defects. This was compared with the influence of ischemia on rat heart. Concentrations of adenine and guanine nucleotides and their catabolites were measured in the extracts of heart biopsies(More)