[Erythrocyte concentrations of adenosine triphosphate (ATP) and magnesium, before and after conservative therapy of lower extremities atherosclerosis]. / Stezenia adenozynotrifosforanu (ATP) i magnezu w krwinkach czerwonych przed i po leczeniu zachowawczym miazdiycowego niedokrwienia konczyn dolnych.

37 patients with atherosclerosis of lower extremities and the mean claudication distance of 300-500 m (Fontaine 11 degrees) were subjected to pharmacotherapy with pentoxyfilline 600 mg twice daily, and walking exercise tests on a treadmill. The concentrations of ATP and magnesium ions in erythrocytes were assessed in the patients in resting condition, and after standardized walking exercise tests, 6 and 12 weeks since the beginning of therapy. Applied treatment proved beneficial in protecting the patients against depletion of ATP in their erythrocytes. Hypomagnesemia and accompanying lowered concentrations of ATP were observed in 1/3 of the cases. As the deficiency of ATP can cause functional changes and structural alterations in the erythrocytes and deterioration of the clinical condition of these patients supplementing magnesium ions in these cases seems justified.

Pyruvate kinase activity in the placentas of women living in polluted and unpolluted environments.

BACKGROUND: It was shown earlier that in women living in a polluted environment, the proportion of hypotrophic newborns was greater than in the general population. The placentas of these women show significant histological changes. The authors decided to check whether the activity of pyruvate kinase (PK), a key enzyme in the third stage of glycolysis, changes similarly. MATERIAL/METHODS: The study was conducted on placentas collected from women who had lived in a polluted environment (Groups I and II) and those who had inhabited an unpolluted area (Group III) while pregnant. RESULTS: Total PK activity and the specific activities of its isoenzymes were measured according to the Bücher and Pfleiderer method. The isolation of PK isoenzymes was carried out following the previously described procedure. Total PK activity was lower in the placentas of women of Groups I and II than in those of Group III. The presence of two PK isoenzymes, M2 and L, was demonstrated. The M2 and L isoenzymes from the placentas of Groups I and II had a lower specific activity than those of Group III. Only one form of the M2 isoenzyme and the L dephospho-isoenzyme in the placentas from Groups I and II was observed, while in placentas of Group III women both forms of the M2 isoenzyme and the L phospho-isoenzyme were noted. CONCLUSIONS: It is possible that the presence of the two PK isoenzymes in the placenta ensures the production of a sufficient amount of pyruvate.