S. Asgary; P. Rahimi; P. Mahzoni; N. Kabiri
Abstract
Diabetes is a metabolic disorder characterized by hyperglycemia resulting from defects in insulin secretion, insulin action or both. Juglans regia L. (Juglandaceae) has been used in Iranian traditional medicine in diabetes treatment. In this study the blood glucose and lowering effects of hydroalcoholic ...
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Diabetes is a metabolic disorder characterized by hyperglycemia resulting from defects in insulin secretion, insulin action or both. Juglans regia L. (Juglandaceae) has been used in Iranian traditional medicine in diabetes treatment. In this study the blood glucose and lowering effects of hydroalcoholic extract of walnut leaves have been investigated in Wistar rats. In this research 18 white male rats, with 180-220 g weight were randomly allocated into three groups with six rats each group: group 1 )nondiabetic control (group 2) diabetic control ( group 3 )diabetic rats treated with hydro-alcoholic extract of walnut leaves (200 mgkg-1 BW). Before the blood sampling, rats had been fasted for 16h, and then fasting blood samples were collected in tubes with heparin. Sampling was performed from the orbital sinus for estimation of blood glucose and others factors. After the blood sampling at the end of experimental period, pancreatic tissue removed from rat body. Then some sections were made and size of islets was investigated. The results indicated significant reduction in serum glucose and glycosylated haemoglobin levels in the third group (P<0.05). Histomorphological investigation of pancreatic islets showed that the size of pancreatic islets is different among the experimental groups. The average of pancreatic islets size indicated significant reduction in diabetic group compared to other groups (P<0.05). This research showed that using walnut extract could be effective on regeneration of injured pancreatic islets in diabetic rats. Probably this effect related to antioxidant compounds in extract. It seems that increase in islet size is the result of remainder cells proliferation.
Gh. Naderi; N. Jafari Dinani; N. Nejabat; M. Kelardasht; A. Jafarian Dehkordi; S. Asgary; R. Shami
Abstract
Disturbance in haemostatic system causes abnormal clots in vessels and thromboambolia. Streptokinas and urokinas are used for emergency treatment of thromboambolia. These drugs have certain limitations which cause serious and sometimes fatal consequences. Herbal preparations are considered to be safe ...
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Disturbance in haemostatic system causes abnormal clots in vessels and thromboambolia. Streptokinas and urokinas are used for emergency treatment of thromboambolia. These drugs have certain limitations which cause serious and sometimes fatal consequences. Herbal preparations are considered to be safe and without side-effects. Since in ancient times it was reported that Zataria moltiflora Boiss., Curcuma domestica Valet., Cinnamomum verum J.Presl and Heracleum persicum Desf. Ex Fischer present anticoagulant effects. This study performed to evaluate fibrinolytic effects of these plants. To evaluate fibrinolytic effects, labeled fibrinogen with FITC and Ca2+ was added to human plasma. Polyphenolic extracts (0.05, 0.5, 5, 50mg/ml) without and with streptokinas, were added to labeled clot. Fluorescence was determined after 10, 20, 40 and 60 minutes (Ex=478, Em= 510). Our findings show that extract of Zataria moltiflora, Curcuma domestica and Cinnamomum verum reveal fibrinolytic effects (P<0.05). This effects are significant and dose dependable, but Heracleum persicum had no significant fibrinolytic effect (P>0.05). Fibrinolytic effects of streptokinase in presence Zataria moltiflora are increased significantly and dose dependably. This effect in presence of Curcuma domestica and Cinnamon only in 5 and 50 mg/dl are increased. Heracleum persicum does not affect fibrinolytic properties of streptokinase. The present study indicate that, Zataria moltiflora presents best fibrinolytic effect, then Curcuma domestica and Cinnamon verum respectively reveal significant fibrinolytic effect and could lysis blood clots in vitro. Consequently, we suggest that further studies to determine in vivo clot dissolving properties and active component(s) of these herbs for clot lysis are warranted.
N. Kabiri; S. Asgary; H. Madani; P. Rahimi
Volume 24, Issue 3 , November 2008, , Pages 304-312
Abstract
Cardiovascular diseases and atherosclerosis are the leading cause of mortality and morbidity around the world. Inflammation and coagulation are two important risk factors of cardiovascular disease. In this study, the effect of the concurrent hydroalcoholic extracts of Hypericum perforatumL. and Amaranthus ...
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Cardiovascular diseases and atherosclerosis are the leading cause of mortality and morbidity around the world. Inflammation and coagulation are two important risk factors of cardiovascular disease. In this study, the effect of the concurrent hydroalcoholic extracts of Hypericum perforatumL. and Amaranthus caudatus L. on inflammatory and coagulation factors in hypercholesterolemic rabbits was studied and its effect was compared with lovastatin. Twenty adult male Newzeland rabbits were randomly divided into four groups of five and were fed for 60 days as follows: basic diet, high cholesterol, high cholesterol along withcombination of Hypericum and Amaranth (HA) extract (75mg/kg) and high cholesterol along with Lovastatin (10mg/kg). Blood samples were taken at the beginning, one month later and at the end of the study in order to measure their serum factors. The result showed that both the extract and lovastatin reduced significantly CRP, white blood cell, fibrinogen and platelet. Therefore Hypericum and Amaranthus by decreasing inflammation and coagulation risk factor prevent atherosclerosis also results showed that above extract is more effective to decrease Cardiovascular risk factor than lovastatin.
N. Jafari Dinani; S. Asgary; H. Madani; Gh. Naderi; P. Mahzoni
Volume 23, Issue 1 , May 2007, , Pages 1-12
Abstract
Atherosclerosis occurs principally in medium and large arteries and is a leading cause of cardiovascular disease. Epidemiologic study indicates that coronary heart disease and atherosclerosis is less in societies which use herbal medicines. Glycyrrhiza glabra is an herb of Papilionaceae family which ...
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Atherosclerosis occurs principally in medium and large arteries and is a leading cause of cardiovascular disease. Epidemiologic study indicates that coronary heart disease and atherosclerosis is less in societies which use herbal medicines. Glycyrrhiza glabra is an herb of Papilionaceae family which contains hypolipidemic compounds and flavonoids with high antioxidant properties. This study was conducted to determine the effect of Glycyrrhiza glabra extract on blood lipid levels and atherosclerosis in rabbits fed with high cholesterol diet. Fifteen male rabbits were randomly divided into three groups, normal diet group, highcholesterolemic control group (1% cholesterol) and high-cholesterol + Glycyrrhiza glabra group (50 mg/kg body weight every other day). The concentration of total cholesterol (TC), LDL cholesterol, triglycerides (TG) and HDL cholesterol were determined in rabbits in the beginning of experiment, and in the end of the first and second month of the study. In the end of the experimental period the rabbits were killed having overdose chloroform and their aortas were removed for assessing atherosclerotic plaques. Results showed that Glycyrrhiza glabra decreased TC, LDL and TG levels and increased HDL, significantly. The lesion atherosclerotic significantly reduced in high-cholesterol + Glycyrrhiza glabra group as compared to highcholesterolemic control group. It could be suggested that the Glycyrrhiza glabra extract can effectively prevent the progress of atherosclerosis and extensive studies are needed to investigate the effect of Glycyrrhiza glabra in prevention and treatment of atherosclerosis.
S. Asgary; Gh. Naderi; N. Askari
Abstract
Flavonoids which are polyphenolic substances are found in different vegetable and fruits and they have anti-oxidant properties. Epidemiological studies showed that flavonoids reduce the prevalence of cardiovascular disease. On the other hand, the usage of synthetic antioxidants have been limited because ...
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Flavonoids which are polyphenolic substances are found in different vegetable and fruits and they have anti-oxidant properties. Epidemiological studies showed that flavonoids reduce the prevalence of cardiovascular disease. On the other hand, the usage of synthetic antioxidants have been limited because of their toxicity and, there are different researches to find better natural antioxidants. This survey investigates the effect of some pure flavonoids such as kaempferol, quercetin, morin and rutin on red blood cell (RBC) hemolysis and their -SH capacity as membrane protection indicator. The flavonoids solutions were prepared. Rate of RBC hemolysis and -SH capacity of cell membrane were determined by spectrophotometer. 2,2´azobis2 amidino propane dihydrechloride (AAPH) was used to induce RBC peroxidation. The effect of each flavonoids on RBC hemolysis was examined in 3 concentrations (0.15, 5, 10) μg/ml but for investigating the effect on -SH groups only the highest concentration (10 μg/ml) of each flavonoids were used. In all cases, the antioxidant activity was dose-dependent. Rutin showed the highest inhibitory effect on RBC hemolysis than other flavonoid, that was 42.5. Also kaempferol, rutin, morin protect -SH groups 6%, 23.3%, 26.4% respectively. Results showed that flavonoids and plants contain flavonoids can be used as natural antioxidants for treatment and prevention of diseases which their pathogenesis are lipid peroxidation.
