Keywords : Antioxidants


Chemopreventive effect of Quercus infectoria galls on DMBA induced mouse skin tumorigenesis

Sherzad Ibrahim Mustafa; Bushra M. Mohammed

Iraqi Journal of Veterinary Sciences, In Press
DOI: 10.33899/ijvs.2019.126267.1281

Chemoprevention is an important strategy to control the process of carcinogenesis and a number of plants with anti-cancer properties are being researched, some of which have shown promising results. Quercus infectoria galls is a well-known medicinal plant which has been used in medicine as larvicidal, anti-inflammatory, antibacterial, anti-fungal, antioxidant, and antidiabetic properties. The present study was carried out to evaluate the anti-tumor activity of the aqueous extract on the two stage process of skin carcinogenesis, consisting of initiation with a single topical application of a carcinogen 7, 12 - dimethylbenz (a) anthracene (DMBA) followed by a promoter (croton oil) three times in a week were employed. A significant reduction in tumor incidence, tumor burden, tumor yield, and cumulative number of papilloma was observed, along with a significant increase in average latent period in mice treated orally with 2 gm/kg of Quercus infectoria galls extract as compared to the positive control group treated with DMBA plus croton oil administered. Furthermore, Histopathological alterations in the carcinogen-treated control animals were also observed in the form of epidermal hyperplasia, keratinized pearl formation, and acanthosis in skin and tumors, whereas these were found to be reduced significantly before and after galls extract oral administration. The results thus concluded that Quercus infectoria galls extract exhibits significant anti-tumor activity and may serve in future drug development programs for the cancer prevention of skin cancer.

Experimental detection of antioxidant and atherogenic effects of grapes seeds extracts in rabbits

Shihaab Al-Bajari; Moataz Al- Akash; Hana Kh. Ismail

Iraqi Journal of Veterinary Sciences, 2019, Volume 33, Issue 2, Pages 243-249
DOI: 10.33899/ijvs.2019.162881

The aim of this study was to determine the ability of Grapes seeds (Vitis vinifera) aqueous, proteinous, non- proteinous and alcoholic extracts as antioxidant and antiatherogenic in rabbits after exposure to 0.5% H2O2 in drinking water for 30 days. The results illustrated capability of 0.5% H2O2 to initiate oxidative stress via significant decrease in Glutathione (GSH), glutathione peroxdiase (GPx), Catalase (CAT) and superoxide dismutase (SOD) level in heart and liver concomitant with significant increase in malondialhyde (MDA) in addition to decrease in high density lipoprotein- cholesterol (HDL-c) and increase low density lipoprotein- cholesterol (LDL-c) in serum of treated only with H2O2 rabbits. While rabbits treated with H2O2 associated with Grapes seeds (aqueous, proteinous, non- proteinous and alcohol) extracts for 15 days showed a significant increase of Glutathione (GSH), glutathione peroxdiase (GPx), superoxide dismutase (SOD) concentration in the heart and liver tissue as well as increase HDL-c, decrease in LDL-c and VLDL-c. While, the histolopathological examination of heart and liver tissue demonstrated that H2O2 induces, degeneration, necrosis and few inflammation foci in the liver and myocardial muscle. While the administration of (Vitis vinifera) aqueous, proteinous, non-proteinous and alcoholic extracts cause improvement in the histological picture of the liver and the myocardial muscle. It was concluded that the (Grapes extracts) aqueous, proteinous, non-proteinous and especially the alcoholic extracts can reduce the damage caused by H2O2 and this will pave the way to investigate the protective effects of the natural substances in the diseases caused by oxidative stress.

Sequential changes of serum and liver subcellular oxidants and antioxidant concentrations in silymarin treated male rats

J.A.A. Al-Sa'aidi; H.J. Shoabith

Iraqi Journal of Veterinary Sciences, 2016, Volume 30, Issue 1, Pages 9-14
DOI: 10.33899/ijvs.2016.116862

The present study aimed to investigate the role of silymarin as an antioxidant and/or it activity in induction of the endogenous antioxidants in intact adult male rats. Seventy males were randomly devided into control and  silymarin treated groups (35 each), and were drenched with drinking water and silymarin suspension (200 mg/ kg b.w) daily for 40 days. Each group was allocated to 5 equal subgroups; sacrificed before treatment (0 day), and after 10, 20, 30, and 40 days of treatment. At the end of each period, males were anaesthesized, dissected and blood samples were obtained for assessment of MDA, SOD, CAT and GSH concentrations. liver samples (1 g) have been removed and homogenized for assessment of liver subcellular MDA, SOD, CAT and GSH concentrations. At the end of each periods, serum and liver subcellular MAD concentrations showed no significant changes between groups, whereas SOD, CAT, and GSH concentrations significantly increased at 10, 20, 30, and 40 day periods in silymarin treated males compared with control. It can be concluded that silymarin antioxidant activity is of pharmacological value not only as an antioxidant by itself but also as an inducer of endogenous enzymatic and non-enzymatic antioxidants even in normal intact male.