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Osama A. El Shabrawy,Seham Abd El Sattar El Batran,Mohamed Refat H. Mahran,Nabila M. Ibrahim 한국생약학회 2011 Natural Product Sciences Vol.17 No.4
Synthetic coumarin and furocoumarin derivatives were evaluated for anticoagulant activity and the effect on liver and kidney function. It was found that all of the compounds under investigation proved to be neither toxic nor lethal up to 500 mg/100 g body weight as a single dose for 24 hrs. All tested compounds showed a significant increase in prothrombin time (PT) in the acute model but failed to show a significant action in the chronic model. Furthermore, all tested compounds revealed a significant increase in activated partial thromboplastin time (APTT) as compared to control value in both acute and chronic model. Also, all tested compounds did not cause any significant changes on liver and kidney functions in rats.
Studies on the Anti-Inflammatory and Analgesic Effects ofExtracts from Marine Sponges
Issa M.I. Fakhr,Nehal A. Hamdy,Mohamed A.A. Radwan,Seham A. El-Batran,Osama A. El Shabrawy 한국생약학회 2006 Natural Product Sciences Vol.12 No.2
specimens of sponges collected from Red Sea, Egypt, were investigated f or their contents ofsecondary metabolites. The crude extracts of the sponges were tested for their anti-inflammatory and analgesiceffects. The toxic effects of the extracts of the two marine sponges were studied. LD50 determination revealed thatthe investigated extracts of ‘Igernella and Ircinia spp’ were 4.69 and 134.7mg/100g b.wt., respectively, whentwo marine sponges extracts showed significant anti-inflamatory and analgesic eff ects. Keywordsanti-inflammatory, analgesic, sponges, Igernella, Ircinia
Synthesis and Biological Activities of New Substituted Indoles
Hishmat, Orchidee H.,Nakkady, Sally S.,El Shabrawy, Osama A.,Mahmoud, Sawsan S. The Pharmaceutical Society of Korea 1992 Archives of Pharmacal Research Vol.15 No.1
2, 3-Diphenyl-6-formyl-5-methoxyindole reacts with ethyl cyano acetate to yield the arylidene derivative which forms with urea and thiourea the corresponding pyrimidine derivatives. The arylidene derivatives react with hydrazines and with active methylenes to form the respective pyrazole derivatives and the $\alpha, \;\beta$-disubstituted acrylonitriles. Seven new compounds were tested for their effects on the arterial blood pressure of rats and analgesic activity.