Coordination compounds of essential microelement germanium(IV) with metals (Mg, Na, K, Ca, Cu, etc.) and organic ligands -biocatalysts, antidotes at intoxications and regulators of mineral metabolism in living organism (nicotinic, citric, tartaric, 1-hydroxyethylidendiphosphonic acids, nicotinamide) are synthesized for the first time on the Department of General Chemistry and Polymers of Odessa Mechnikov National University. The favorable activity of the synthesized compounds on cardiovascular and chronic respiratory diseases, senile pneu-on cardiovascular and chronic respiratory diseases, senile pneumonia, neuropsychiatric and metabolic disorders, ischemic heart diseases, etc. is described. Thus, the influence of 1-hydroxyethylidendiphosphonatogermanate (medgerm) on CNS, its anxiolytic activity and absence of both hypnotic and myorelaxant effects has been shown. Cardioprotector properties of magnesium hydroxyethylidendiphosphonategermanate as a potential effective and safe drug with the high antihypertensive and antiarrhythmic activity have been found out. The interferoninductive and immunostimulatory activity of germanium(IV) compounds with 1-hydroxyethylidendiphosphonic, nicotinic acids, nicotinamide, pyracetam has been studied. Injection of these drugs (concentration 100-125 μg/ml) causes the 100 % delay of cytopathic action of vesicular stomatitis virus in the cell cultures that demonstrates the ability of compounds to increase essentially cells stability. The perspectives of germanium coordination compounds as interferon inductors and as immune pharmaceuticals for prevention the disbalance of the immune system are reviewed.
Background. Stroke is among the leading causes of death and disability worldwide with rising incidence among young people today. This is the third most common cause of disability-adjusted life-years worldwideObjective. The present study evaluated the cerebroprotective action of coordination compounds of germanium with underlying global cerebral ischemia in rats.Methods. Global cerebral infarction was induced by bilateral common carotid artery occlusion. For primary screening we used numerous bis(citrate) germanates (stannates) compounds, which contained different metals: OL1-8, and VITAGERM-1,2,3 and 4. All germanium complexes used were injected intraperitoneally (1 % aqueous solution at a dose of 50 and 100 mg/kg in 35 min after bilateral common carotid artery occlusion). Piracetam was used as a reference drug. Criteria of cerebroprotection efficacy: survival of rats (%), ET50 (median effective time), observational Irwin’s test.Results. Almost all bis(citrate) germanates (stannates), which contained different metals, possessed anti-ischemic activity of different intensity. The exceptions were cobalt-containing OL-6 and OL-2 compounds. The most significant efficacy of all investigated indices (which exceeded even reference drug) was evidenced for VITAGERM-1 – a coordination compound of germanium, diethylenetriaminepentaacetic acid and lithium. Conclusions. Results of our experiments are the substitution for further more profound pharmacological investigation of VITAGERM-1 for stroke cerebroprotection and its implementation into clinics.
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