Efficacy of hesperidin (HDN), on apoptotic markers in tissue of normal and myocardial ischemic rats

Myocardial Infarction (MI) results from the interruption of blood supply to a part of the heart causes heart cells to die. In this process, cardiomyocytereach the state of ischemia. Hesperidin (HDN) is naturally occuring flavonoids in citrus and vegetables, have potent antioxidant property. In this study, myocardial ischemia was induced in the experimental rats by subcutaneous injection of Isoproterenol hydrochloride 85 mg/kg b.w., dissolved in saline for two consecutive days. The optimum dose of HDN 200 mg/ kg b.w., was administered to rats post orally for seven days after ISO-induction. In this study, expression of apoptotic markers TNF-α, Fas, Caspase-3, -9, Bax, Bcl-2, Bcl-xL proteins were analyzed by western blot. ISO induced ischemic rats showed up regulation of TNF-α, Fas, Caspase-3, -9 and Bax and all are down regulated after adminstration of HDN. The heart of ischemic rats showed the down regulated expression of Bcl-2 and Bcl-xL. Administration of HDN of ischemic rats, upregulated the expression of Bcl-2 and Bcl-xL expression. Based on this findings HDN conforms the anti apoptotic property. Keywords:  Hesperidin, Myocardial Infarction, Apoptosis, Isoprotereno

CARVACROL AMELIORATES THE PPAR-Α AND CYTOCHROME P450 EXPRESSION ON D-GALACTOSAMINE INDUCED HEPATOTOXICITY RATS

Background: Carvacrol (2-methyl-5-(1-methylethyl)-phenol) is a predominant monoterpenic phenol which occurs in many essential oils of the family Labiatae including Origanum, Satureja, Thymbra, Thymus, and Corydothymus species. It is well known for its anti-inflammatory, antioxidant and antitumor activities. The present study investigates the influence of carvacrol on CYP2E1 and PPAR-α on D-Galactosamine (D-GalN)-induced hepatotoxic rats. Materials and Methods: The mRNA and protein expression levels of CYP2E1 and PPAR-α have been assayed by semi-quantitative reverse transcriptase-polymerase chain reaction (RT-PCR) and western blot analysis. Results: The result demonstrated that the mRNA and protein expressions of CYP2E1(p=0.012; p=0.015) significantly up-regulated while the mRNA and protein expressions of PPAR-α (p=0.026; p=0.03) significantly down-regulated on D-galactosamine induced hepatotoxic rats and treatment with carvacrol significantly suppressed the mRNA and protein (CYP2E1, p=0.010; p=0.011) (PPAR-α, p=0.033; p=0.037) expressions of these genes. Conclusion: Thus, the present results have shown that carvacrol has the hepatoprotective effect and also alleviates liver damage associated with GalN induced hepatotoxic rats by down-regulating the CYP2E1 and up-regulating the PPAR-α expression

Protective effect of Cardiospermum halicacabum leaf extract on glycoprotein components on STZ–induced hyperglycemic rats

AbstractObjectiveTo investigate the protective role of Cardiospermum halicacabum (C. halicacabum) leaf extract on glycoprotein metabolism in streptozotocin (STZ)-induced diabetic rats.MethodsDiabetes was induced in male albino Wistar rats by intraperitonial administration of STZ. The C. halicacabum leaf extract (CHE) was administered orally to normal and STZ–diabetic rats for 45 days. The effects of C. halicacabum leaf extract (CHE) on plasma and tissue glycoproteins (hexose, hexosamine, fucose and sialic acid) were determined.ResultsThe levels of plasma and tissues glycoproteins containing hexose, hexosamine and fucose were significantly increased in STZ–induced diabetic rats. In addition, the level of sialic acid significantly increased in plasma and liver while decreased in kidney of STZ–induced diabetic rats. After administration of CHE to diabetic rats, the metabolic alteration of glycoprotein reverted towards normal levels.ConclusionsThe present study indicates that the CHE possesses a protective effect on abnormal glycoprotein metabolism in addition to its antihyperglycemic activity

INFLUENCE OF CARDIOSPERMUM HALICACABUM LEAF EXTRACT ON MEMBRANE BOUND ENZYMES IN STREPTOZOTOCIN-INDUCED DIABETIC RATS

Background: Cardiospermum halicacabum L. has been proven scientifically to possess anti-inflammatory, antihyperglycemic, antioxidant, antiglycation, analgesic and antipyretic activities. It also has been used in Ayurveda and folk medicine for the treatment of rheumatism, fever and earache. Objective: In the present study, we investigated whether the Cardiospermum halicacabum leaf extract (CHE) can improve the membrane bound enzymes activity by streptozotocin (STZ)-induced diabetic rats. Methods: Diabetes was induced in male albino Wistar rats by intraperitonial administration of STZ. The CHE was administered orally to normal and STZ-diabetic rats for 45 days. Results: There were a marked decrease in the activities of membrane bound phosphatases such as total ATPases, Na+/K+-ATPases, Mg2+-ATPases and Ca2+-ATPases in the erythrocytes and tissues of STZ-induced diabetic rats. Oral administration of CHE to diabetic rats significantly increased the activities of these enzymes towards near normalcy. Conclusions: Thus, the present study indicates that the beneficial role of membrane bound enzymes in STZ-induced diabetic rats. The antihyperglycemic, antioxidant and antihyperlipidemic properties of CHE (Veeramani et al., 2008; Veeramani et al., 2010) could be helpful to maintain the levels of membrane bound enzymes in STZ-induced diabetic rats showing the membrane stabilizing property of extract

Effect of Solanum surattense on mitochondrial enzymes in diabetic rats and in vitro glucose uptake activity in L6 myotubes

Background: S. surattense is widely used in Siddha medicine for various ailments. Objective: The aim was to evaluate the impact of alcoholic leaf-extract of S. surattense on mitochondrial enzymes in streptozotocin (STZ) induced diabetic rats and to study the in vitro muscle glucose uptake activity on L6 myotubes. Materials and Methods: The male albino Wistar rats were randomly divided into five groups of six animals each. Diabetes was induced by intraperitoneal injection of STZ (40 mg/kg body weight). After being confirmed the diabetic rats were treated with alcoholic leaf-extract of S. surattense (100 mg/kg body weight) for 45 days. The biochemical estimations (liver mitochondrial enzymes, antioxidants, thiobarbituric acid reactive substances [TBARS]) and histopathological studies were performed. Further, the in vitro muscle glucose uptake activity in L6 myotubes and messenger RNA (mRNA) expression of glucose transporter-4 (GLUT-4) was performed. Results: In diabetic rats, the activities of liver mitochondrial enzymes were found to be significantly lowered. The mitochondrial TBARS level increased, whereas the activities/level of enzymatic and non-enzymatic antioxidants decreased in diabetic rats. Administration of S. surattense to diabetic rats significantly reversed the above parameters toward normalcy. Furthermore in diabetic rats, the histopathological studies showed growth of adipose tissue and shrinkage of islets in the pancreas, liver showed fatty change with mild inflammation of portal triad, and kidney showed messangial capillary proliferation of glomeruli and fatty infiltration of tubules. Treatment with S. surattense brought back these changes to near normalcy. The extract was analyzed for in vitro muscle glucose uptake activity in L6 myotubes and mRNA expression of GLUT-4 by semi-quantitative reverse transcriptase-polymerase chain reaction. One nano gram per millilitre of S. surattense leaf-extract gave 115% glucose uptake on L6 myotubes. It also showed elevated levels of GLUT-4 mRNA transcripts, when compared with control cells. Conclusion: These studies strongly support the anti-diabetic nature of S. surattense