Tag Archives: corvitin

Corvitin modulates the content of lipids in rat liver bile

T. V. Vovkun1, P. I. Yanchuk1, L. Ya. Shtanova1,
S. P. Veselsky1, N. B. Filimonova1, I. V. Komarov2

1ESC “Institute of Biology and Мedicine”, National Taras Shevchenko University of Kyiv, Ukraine
2“Institute of High Technologies
”, National Taras Shevchenko University of Kyiv, Ukraine;
e-mail: shtanova@ukr.net

Received: 23 March 2019; Accepted: 18 October 2019

Quercetin (QUE) and its water-soluble form сorvitin are medicinally important members of the fla­vonoid family and the most prominent dietary antioxidants. Numerous pharmacological effects of quercetin include protection against diseases, such as atherosclerosis, myocardial infarction, and cerebrovascular disea­ses. Corvitin modulates liver blood flow but its effects on liver lipid metabolism have not been understood. We investigated the influence of corvitin (2.5, 5, 10 mg/kg) on the formation and secretion of cholesterol (Chol), cholesterol esters (EChol), phospholipids (PLs), free fatty acids (FFAs), and triglycerides (TGs) into the bile. Secreted bile was collected during 2.5 h of the experiment. Lipid fractions of the bile were separated by thin-layer chromatography. We defined that administration of corvitin caused a significant (P < 0.05–0.001) increase in levels of all studied lipid components of bile. At a dose of 2.5 and 5 mg/kg corvitin increased bile content of Chol, PLs and FFAs,and at a  dose of 10 mg/kg had the largest effect on the total production of EChol and TGs. We concluded that corvitin activates the liver lipids metabolism and processes of bile formation.

The features of bile acids exchange in rats under the influence of corvitin

T. V. Vovkun1, P. I. Yanchuk1, L. Ya. Shtanova1, S. P. Veselskiy1,
N. B. Filimonova1, A. S. Shalamay2, V. G. Vedmid2

1ERC “Institute of Biology and Мedicine”, National Taras Shevchenko
University of Kyiv, Ukraine;
2PJSC SIC “Borshchahivskiy Chemical Pharmaceutical Plant”, Kyiv, Ukraine;
e-mail: shtanova@ukr.net

Corvitin is a soluble form of quercetin (QUE) and its effects are based on the ability to inhibit the activity of 5-lipoxygenase and to block the formation of leukotrienes. Corvitin increases bloodflow in the stomach­, pancreas and liver, but its influence on the excretory liver function has not been studied. We investigated the effect of corvitin (2.5, 5, 10 mg/kg intraportally) on bile formation, determined the biliary content of total, free and conjugated bile acids (BAs). Free and conjugated BAs were separated by thin layer chromatography method. It was shown that corvitin increased the content of total BAs in the bile of rats in all tested groups. At a dose of 2.5 mg/kg flavonoid did not сhange free BAs secretion, but while elevated the content of conjugated BAs. Both free and conjugated BAs secretion was increased in rats treated with corvitin at a dose of 5 mg/kg. Increasing of corvitin dose to 10 mg/kg resulted in enhanced secretion of free BAs. Consequently, inhibition of leukotrienes synthesis by corvitin is followed by modulation of total, free and conjugated BAs  formation and secretion into the bile.

Corvitin restores metallothionein and glial fibrillary acidic protein levels in rat brain affected by pituitrin-izadrin

H. N. Shiyntum1, O. O. Dovban1, Y. P. Kovalchuk1,
T. Ya. Yaroshenko2, G. A. Ushakova1

1Oles Honchar Dnipro National University, Ukraine;
2I. Horbachevsky Ternopil State Medical University, Ukraine;
e-mail: hnkafor@yahoo.com

In this research, we investigated the effect of pituitrin-izadrin induced injury on the levels of metallothionein (MT) and soluble and filament forms of glial fibrillary acidic protein (GFAP) in the hippocampus, cerebellum, thalamus, and the cerebral cortex, and examined the effect of corvitin on the brain under the noted changes. Our results showed oppositely directed changes – a decrease in the level of MT and an increase in GFAP in the rat brain, with a tendency to astrogliosis development, under the influence of systemic deficiencies in myocardial function. The use of corvitin at a dose of 42 mg/kg for five days after a cardiac attack caused by pituitary-izadrin leads to recovery in the balance of the studied proteins.

Influence of ademol on NO metabolism indices in rats with modeling myocardial infarction

O. A. Khodakovskiy1, S. V. Pavlov2, N. V. Buchtiyarova2

1Vinnitsa National Pirogov Memorial Medical University, Ukraine;
2Zaporizhzhia State Medical University, Ukraine;
e-mail: aleksey.hodakovskiy@bk.ru

It was established in experiments on the rats in the acute period of modeling pituitrin-isadrin myocardial infarction the formation of nitrogen monoxide decreases along with its accelerated transformation into peroxynitrite. It was evidenced by more than double inhibition of NO synthase activity in the myocardium and by decreasing the amount of nitrates on the background of the increasing level of peroxynitrites’ marker – nitrotyrosine by 246.6% at an average. Experimental therapy of rats by ademol which is a derivate of adamantan (1-adamantiloxy-3-morpholino-2 propanol hydrochloride) better than by corvitin normalizes the processes of synthesis of nitric oxide. At the same time ademol probably exceeded the reference drug in ability to increase NO synthase activity and amount of nitrate, and promoted a decrease of the level of nitrotyrosine in the myocardium on the average by 36.3; 50.6 and 12.7%, respectively. Corrective influence of ademol on indicators of metabolism in NO system under the conditions of acute cardiac ischemia indicates to promicing development of domestic cardioprotector on its base.

Activity of trypsin-like enzymes and gelatinases in rats with doxorubicin cardiomyopathy

 Iu. А. Gordiienko1, Ya. V. Babets2, А. О. Kulinich1,
А. І. Shevtsova1, G. О. Ushakova2

1SE Dnipropetrovsk Medical Academy of Health Ministry of Ukraine;
2Oles’ Honchar Dnipropetrovs’k National University, Ukraine;
e-mail: gordienko.ju@gmail.com

Activity of trypsin-like enzymes (ATLE) and gelatinases A and B were studied in the blood plasma and extracts from cardiac muscle, cerebral cortex and cerebellum of rats with cardiomyopathy caused by anthracycline antibiotic doxorubicin against the background of preventive application of corvitin and α-ketoglutarate. ATLE significantly increased in blood plasma and extracts from cerebral cortex but decreased in extracts from cardiac muscle and cerebellum in doxorubicin cardiomyopathy (DCMP). In addition, a significant increase of activity of both gelatinases in plasma and tissue extracts was observed. Preventive administration of corvitin and α-ketoglutarate resulted in differently directed changes of activity of the above mentioned enzymes in heart and brain tissues. Obtained data confirm the hypothesis about activation of proteolysis under the influence of anthracycline antibiotics and testify to selective effect of corvitin and α-ketoglutarate on ATLE and gelatinases.