B. Mosallanejad; R. Avizeh; H. Najafzadeh Varzi; M. Pourmehdi
Abstract
In the present study, effect of silymarin was evaluated as a protective drug of liver against acute hepatotoxicity due to administration of mebendazole in German shepherd dogs (mixed breeds). Twenty five healthy dogs were randomly allotted to five equal groups. Dogs in group A were given mebendazole ...
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In the present study, effect of silymarin was evaluated as a protective drug of liver against acute hepatotoxicity due to administration of mebendazole in German shepherd dogs (mixed breeds). Twenty five healthy dogs were randomly allotted to five equal groups. Dogs in group A were given mebendazole with single dose 150 mg⁄kg, p.o.; group B consisted of dogs that received silymarin with single dose 30 mg⁄kg, p.o. concurrent with mebendazole administration; groups C, D and E were treated like group B, but silymarin was administered 2, 12 and 24 h after administration of mebendazole respectively. The serum concentrations of alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), lactate dehydrogenase (LDH) and total and direct bilirubin were measured before administration of mebendazole and 2, 12, 24 and 72 h later as indices of liver injury. A single oral administration of mebendazole significantly elevated serum concentrations of ALT, AST, ALP, LDH in all cases of group A (P<0.05), after 24 h. In both groups of B and C, levels of serumenzyme activities remained within the normal values. The difference was significant between groups B and C with group A (P<0.05). Levels of serumenzyme activities were higher than normal values in three cases of the group D and in all dogs of the group E. This study showed that silymarin could protect liver tissue against oxidative stress in dogs with mebendazole intoxication particularly in the first 2 hours after exposure.
H. Najafzadeh; S. Esmailzadeh; H. Morovvati; R. Avizeh; M. Ezati
Abstract
Drug-induced nephrotoxicity is an important factor for renal failure in dogs. Aminoglycosides including gentamicin could produce nephrotoxicity in dogs. The oxidative stress might be the case. Silymarin (extract seed of silybum marianum) is a potent antioxidant. In present study, the effect of silymarin ...
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Drug-induced nephrotoxicity is an important factor for renal failure in dogs. Aminoglycosides including gentamicin could produce nephrotoxicity in dogs. The oxidative stress might be the case. Silymarin (extract seed of silybum marianum) is a potent antioxidant. In present study, the effect of silymarin and vitamin E compared to gentamaicin-induced nephrotoxicity. The study has been conducted on dogs in 5 groups: group 1 has been kept as control and received saline. Gentamicin was injected in other groups once daily for 9 days. Vitamin E and silymarin were given in group 3 and 4 respectively. In group 5, vitamin E and silymarin were co-administrated. Renal tissue was microscopically examined by routine method and Hematoxillin-Eosine color. In histopathological examination of renal tissue, all groups (except group 1) had several changes especially glomerulonephritis; but this abnormality was not seen in group 4. The results showed, the silymarin and vitamin E have similar effect on gentamicin–induced nephrotoxicity in dogs; but in histopathological examination, the silymarin had better effect than vitamin E or their combination.
H. Morovvati; H. Najafzadeh; R. Avizeh; N. Khadivi Kashani
Volume 24, Issue 3 , November 2008, , Pages 363-373
Abstract
Drug-induced ototoxicity is one of the important factors for less auditory in dogs. Aminoglycosides including gentamicin can produce ototoxicity in dogs. The oxidative stress can be related to it. Silymarin, in the seed extract of Silybum marianum, is a potent antioxidant. In present study, the effect ...
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Drug-induced ototoxicity is one of the important factors for less auditory in dogs. Aminoglycosides including gentamicin can produce ototoxicity in dogs. The oxidative stress can be related to it. Silymarin, in the seed extract of Silybum marianum, is a potent antioxidant. In present study, the effect of silymarin and vitamin E was compared on gentamaicin-induced ototoxicity. The study was done on dogs in 5 groups: group1 was kept as control and received saline. Gentamicin was prescribed in other groups once for 9 days. Vitamin E and silymarin were given in group 3 and 4, respectively. In group 5, vitamin E and silymarin were co-administrated. After 9 days, the dogs were euthanized and ear samples were collected. One ear of dogs was colored by silver nitrate and another was decalcified by decalcificative solution. The decalcified samples were routinely sectioned and colored by Hematoxillin- Eosine (H&E) and studied by light microscope. Hair cells were not determined by silver nitrate. Organ of coarti body, tectorial membrane, limbus spiral, spiral ganglion, interdental cells, supporting cells and type I and II of hair cells were identified in samples and colored by H&E. These histological compartments were determined in control and silymarin groups. They were not observed in other groups, because gentamicin strongly destroyed cells. Thus, silymarin decreases gentamicin-induced changes in inner ear probably by its antioxidative property.
