@article {83, title = {Anti-diabetic Properties of Thymoquinone is unassociated with Glycogen Phosphorylase Inhibition}, journal = {Pharmacognosy Journal}, volume = {7}, year = {2015}, month = {01/2015}, pages = {406-410}, type = {Original Article}, chapter = {406}, abstract = {

Background: Nigella sativa L. (Black seed), is commonly used by traditional healers as a remedy for more than four thousand years. The antidiabetic property of N. sativa seeds oil is attributable to the presence of Thymoquinone (TQ). On the other hand many studies have been designed to investigate the possible effects of the TQ in Streptozotocin (STZ) and nicotinamide (NA)-induced diabetes in rats. Aim of the study: The aim of this study was to elucidate the mechanisms underlying the glucose lowering effects of thymoquinone. Methods: In vitro and in silico using glycogen phosphorylase (GPa) enzyme assay and docking tools were used. Results: Oral administration of TQ for 60 days, dose dependently improved the glycemic status in STZ-NA induced diabetic rats. GPa activity was measured in the direction of glycogen synthesis by the release of phosphate from glucose-1-phosphate. TQ at a concentration of 0.05 Mm inhibits GPa activity by only 14.9\%. Conclusion: These results show that TQ at 60 mg/kg b.w is associated with potential antihyperglycemic effects. Furthermore, anti-diabetic properties of TQ are unassociated with glycogen phosphorylase inhibition.

}, keywords = {Diabetes, Docking, Enzyme, Glycogen phosphorylase inhibition, Streptozotocin, Thymoquinone.}, doi = {10.5530/pj.2015.6.16}, author = {Nahid Mahmoud Hassan El-Ameen and Manal Mohamed Elhassan Taha and Siddig Ibrahim Abdelwahab and Asaad Khalid and Fatima Elfatih and Mona Awad Kamel and Bassem Yousif Sheikh} } @article {145, title = {Antimicrobial Effects of Thymoquinone on Entamoeba histolytica and Giardia lamblia}, journal = {Pharmacognosy Journal}, volume = {8}, year = {2015}, month = {December 2015}, pages = {168-170}, type = {Original Article}, chapter = {168}, abstract = {

Background: Parasitic infections are a major difficulty in tropical and subtropical countries. Traditionally medicinal plants have been used in folk medicine to treat parasitic infections and are a valuable source of novel anti-parasitics. Objective: In our search for therapeutic alternatives to anti- protozoal chemotherapy, thymoquinone, the active ingredient of Black cumin (Nigella sativa) was examined. Materials and Methods: Thymoquinone was tested against Entamoeba histolytica and Giardia lamblia using in vitro susceptibility assays and the mortality of the parasites were then obtained using the standard calculations. The compound was also tested for 48 and 72 hours on both parasites. Results: The current study indicate that the mortality of TQ showed 85.5\%, 91.5\% and 96.8\% mortality on E. histolytica for 25 ppm at 24 hr, 48 and 72 hr, respectively, with IC50 2\¥10-19,. On the other hand, this natural compound showed a mortality of 82.83\%, 91.76\% and 96.62\% mortality on G. lamblia for 25 ppm at 24 hr, 48 and 72 hr, respectively, with IC50 4.8\¥10-5. Metrondizole powder gave 70.9\% mortality at 156 ppm at the same times. Conclusion: The current results indicate that TQ is more potent on E. histolytica compared to G. lamblia. Further pharmacological studies were needed to help in the clinical presentation of thymoquinone.

}, keywords = {Entamoeba histolytica, Giardia lamblia., Nigella sativa, Prophetic Medicine, Thymoquinone}, doi = {10.5530/pj.2016.2.12}, author = {Bassem Yousef Sheikh and Manal Mohamed Elhassan Taha and Waleed Syaed Koko and Siddig Ibrahim Abdelwahab} } @article {1449, title = {Assessment of Cytotoxicity of Smokeless Tobacco (Shammah) In Hepg2 and WRL68 Cells Line}, journal = {Pharmacognosy Journal}, volume = {7}, year = {2015}, month = {29th Apr, 2015}, pages = {242-248}, type = {Original Article}, chapter = {242}, abstract = {

Shammah is a traditional form of chewing tobacco [Smokeless tobacco, (ST)] that is commonly used in the Middle east specially Saudi Arabia (KSA), Yemen and Sudan. The cytotoxicity of Sudanese and Yemenis ST hexane and methanol extracts was evaluated using MTT assay. Annexin-V assay has been used to detect the induction of apoptosis. Luminescence based assay also been conducted to check the level of caspases enzyme. The involvement of cell cycle check point arrest has been performed using flow cytometry analysis. The current study found that ST has the capacity to induce cell toxicity in human liver cells. The inhibitory capacity of ST in HepG2 and WRL 68 has been found to be 151 \± 2.5 and 305 \± 11.5 \μg/ml for 24 h. An early apoptosis induction in HepG2 cells was observed by annexin V assay, which clearly exhibited significantly increased early and late apoptosis phases both at 24 and 48 h. Both the caspases-8 and-9 level was found to be increased by the introduction of ST to HepG2 cells significantly (p\<0.05). Moreover the ST extract was able to arrest the cell cycle check point at G2/M phase. A significantly increasing pattern of hypodiploid phases of cells also been observed, which confirm the apoptosis induction again. Collectively, results presented in this study demonstrated that the ST, which is used as a euphoritic substance of abuse also, has significant level of toxicity in human cells. Moreover the mode of cell death was found to be though programmed cell death which is closely associated with cell cycle arrest.

Key words: Hepatotoxicity, In vitro models, Saudi Arabia, Smokeless tobacco, Substance Absue Research Centre, Shammah.

}, keywords = {Hepatotoxicity, In vitro models, Saudi Arabia, Shammah., Smokeless tobacco, Substance Absue Research Centre}, author = {Siddig Ibrahim Abdelwahab and Syam Mohan, and Manal Moahmed Elhassan Taha and Rashad Bin Mohammed Alsanosy and Hamed Karimian} } @article {60, title = {Assessment of Cytotoxicity of Smokeless Tobacco (Shammah) In Hepg2 and WRL68 Cells Line}, journal = {Pharmacognosy Journal}, volume = {7}, year = {2015}, month = {Jul-Aug 2015}, pages = {242-248}, type = {Original Article}, chapter = {242}, abstract = {

Shammah is a traditional form of chewing tobacco [Smokeless tobacco, (ST)] that is commonly used in the Middle east specially Saudi Arabia (KSA), Yemen and Sudan. The cytotoxicity of Sudanese and Yemenis ST hexane and methanol extracts was evaluated using MTT assay. Annexin-V assay has been used to detect the induction of apoptosis. Luminescence based assay also been conducted to check the level of caspases enzyme. The involvement of cell cycle check point arrest has been performed using flow cytometry analysis. The current study found that ST has the capacity to induce cell toxicity in human liver cells. The inhibitory capacity of ST in HepG2 and WRL 68 has been found to be 151 \± 2.5 and 305 \± 11.5 \μg/ml for 24 h. An early apoptosis induction in HepG2 cells was observed by annexin V assay, which clearly exhibited significantly increased early and late apoptosis phases both at 24 and 48 h. Both the caspases-8 and-9 level was found to be increased by the introduction of ST to HepG2 cells significantly (p\<0.05). Moreover the ST extract was able to arrest the cell cycle check point at G2/M phase. A significantly increasing pattern of hypodiploid phases of cells also been observed, which confirm the apoptosis induction again. Collectively, results presented in this study demonstrated that the ST, which is used as a euphoritic substance of abuse also, has significant level of toxicity in human cells. Moreover the mode of cell death was found to be though programmed cell death which is closely associated with cell cycle arrest

}, keywords = {Hepatotoxicity, In vitro models, Saudi Arabia, Shammah, Smokeless tobacco, Substance Absue Research Centre}, doi = {10.5530/pj.2015.4.6}, author = {Siddig Ibrahim Abdelwahab and Rashad Bin Mohammed Alsanosy}, editor = {Syam Mohan and Manal Moahmed Elhassan Taha} } @article {1475, title = {Effectiveness of Sidr Honey on the prevention of ethanol-induced gatroulcerogenesis: role of antioxidant and antiapoptotic mechanism}, journal = {Pharmacognosy Journal}, volume = {7}, year = {2015}, month = {13th Feb, 2015}, pages = {157-164}, type = {Original Article}, chapter = {157}, abstract = {

Background: Sider (Ziziphus spina-christi (L.) Desf.) Honey has been used for the treatment of gastrointestinal disorders including peptic ulcer. Aim of the study: The mechanism of the antiulcer effect of sider honey was studied placing emphasis on its role to block oxidative damage and apoptosis during ethanol-induced gastric ulceration in rats. The mechanism of the antiulcer effect of sider honey was studied placing emphasis on its role to block oxidative damage and apoptosis during ethanol-induced gastric ulceration in rats. Materials and methods: Experimental animals were orally treated with sidr honey (100, 250 and 500 mg/kg, respectively) or omeprazole and subsequently exposed to 95\%ethanol (5 mL/Kg, orally) to induce acute gastroulcerogenesis. Effectiveness of sidr honey was evaluated using ulcer index, pH of gastric juice, mucus content, morphological analyses, glutathione assay and malondialdehyde level. The anti-apoptotic role of sidr honey was studied using immunohistochemical staining of gastric tissues using monoclonal antibodies of Bax pathway. Results: Dose-response studies in ethanol-induced ulcer indicate that sidr honey significantly blocks gastric lesions at lower dose (100 mg/kg). Lipid peroxidation and glutathione depletion were significantly inhibited by sidr honey. Sidr honey modulated the immuno-expression of mitochondrial associated protein (Bax). Conclusion: Thus, sider honey plays a considerable role in gastro protection by acting as a potent antioxidant and antiapoptotic agent. Future study is required to explore its potential clinical usage.

Key words: Antiapoptotic Mechanism, Antioxidant Agents, Gastro protection, Monofloral Nectar, Sidr Honey.

}, keywords = {Antiapoptotic Mechanism, antioxidant agents, Gastro protection, monofloral nectar, Sidr Honey.}, author = {Manal Mohamed Elhassan Taha and Siddig Ibrahim Abdelwahab and Rashad Elsanousi and Bassem Y. Sheikh and Mahmood Ameen Abdulla and Saif Eldeen Babiker and Husham Elraih and Eldaw Mohamed} } @article {46, title = {Effectiveness of Sidr Honey on the prevention of ethanol-induced gatroulcerogenesis: role of antioxidant and antiapoptotic mechanism}, journal = {Pharmacognosy Journal}, volume = {7}, year = {2015}, month = {01/2015}, pages = {157-164}, type = {Original Article}, chapter = {157}, abstract = {

Background: Sider (Ziziphus spina-christi (L.) Desf.) Honey has been used for the treatment of gastrointestinal disorders including peptic ulcer. Aim of the study: The mechanism of the antiulcer effect of sider honey was studied placing emphasis on its role to block oxidative damage and apoptosis during ethanol-induced gastric ulceration in rats. The mechanism of the antiulcer effect of sider honey was studied placing emphasis on its role to block oxidative damage and apoptosis during ethanol-induced gastric ulceration in rats. Materials and methods: Experimental animals were orally treated with sidr honey (100, 250 and 500 mg/kg, respectively) or omeprazole and subsequently exposed to 95\% ethanol (5 mL/Kg, orally) to induce acute gastroulcerogenesis. Effectiveness of sidr honey was evaluated using ulcer index, pH of gastric juice, mucus content, morphological analyses, glutathione assay and malondialdehyde level. The anti-apoptotic role of sidr honey was studied using immunohistochemical staining of gastric tissues using monoclonal antibodies of Bax pathway. Results: Dose-response studies in ethanol-induced ulcer indicate that sidr honey significantly blocks gastric lesions at lower dose (100 mg/kg). Lipid peroxidation and glutathione depletion were significantly inhibited by sidr honey. Sidr honey modulated the immuno-expression of mitochondrial associated protein (Bax). Conclusion: Thus, sider honey plays a considerable role in gastro protection by acting as a potent antioxidant and antiapoptotic agent. Future study is required to explore its potential clinical usage.

}, doi = {10.5530/pj.2015.3.3}, author = {Manal Mohamed Elhassan Taha and Siddig Ibrahim Abdelwahab and Rashad Elsanousi and Bassem Y. Sheikh and Mahmood Ameen Abdulla and Saif Eldeen Babiker and Husham Elraih and Eldaw Mohamed} } @article {1538, title = {Cytotoxicity and Oral Acute Toxicity Studies of b-mangostin Isolated from Cratoxylum arborescens}, journal = {Pharmacognosy Journal}, volume = {6}, year = {2014}, month = {18th Feb,2014}, pages = {47-56}, type = {Original Article}, abstract = {

Introduction: The objective of this study was to investigate the cytotoxicity and oral acute toxicity of \β-mangostin isolated from Cratoxylum arborescens. Material and methods: Healthy male and female ICR mice (8 weeks) were fed orally with 250 and 500mg/kg of \β-mangostin. Body weight of each animal was measured and any gross behavioral change was observed daily. Hematological and clinical biochemical parameters as well as histopathological analysis were carried out on 15th day. The level of oxidative stress was analyzed using MDA and GSH measurement.Discussion: The results showed that oral administration of the \β-mangostin had no adverse effect on the growth rate, hematological and clinical biochemical parameters. Histological studies showed that the treatments did not induce any pathological changes in the liver and kidney. The compound at both the doses did not alter the oxidative stress biomarkers. The in vitro cytotoxicity of \β Mangostin was investigated in HepG2, A549, MCF-7, MDA-MB-231 and PC3 cells. There was significant cytotoxicity in both type of breast cancer cells (MCF-7 and MDA-MB-231). In conclusion, our results show that there was no treatment-related acute toxicity in mice following 14-days oral administration of 250 and 500mg/kg of \β-mangostin. Conclusion: The results showed that the compound can be selected for detailed in vitro and in vivo breast cancer research.

Key words: Cratoxylum arborescens, β-mangostin, acute toxicity, anti-cancer.

}, keywords = {Acute toxicity, Anti-cancer, Cratoxylum arborescens, β-mangostin}, author = {Suvitha Syam, and Ahmad Bustamam, and Rasedee Abdullah, and Mohamed Aspollah Sukari, and Najihah Mohd Hashim, and Maizatulakmal Yahayu, and Pouya Hassandarvish, and Syam Mohan, and Siddig Ibrahim Abdelwahab} }