Representative compounds were evaluated as potential antimicrobia

Representative compounds were evaluated as potential antimicrobial agents. The most promising compound in this series, the N-(1-naphthyl)-3-amino-5-hydroxy-4-phenyl-1H-pyrazole-1-carboxamide 2f, was the most effective against the reference strains of pathogenic S. aureus ATCC 25923 and S. aureus ATCC 6538 or opportunistic S. epidermidis ATCC 12228 with MIC value of 7.81

mu g/ml and against the other Gram-positive species with MIC values 15.63-31.25 mu g/ml. This compound also showed high activity against clinical isolates of MSSA (methicillin-sensitive Staphylococcus aureus) with MIC of 0.98-31.25 mu g/ml and MRSA (methicillin-resistant Staphylococcus aureus) with MIC of 1.96-7.81 mu g/ml.”

An ethanolic extract of Nigella sativa L. (EE-NS) was investigated for its antioxidant properties and radioprotective effects against g-radiation-induced oxidative damage.

Materials and methods: The radical scavenging activity of the extract was measured by 2,2-diphenyl-1-picrylhydrazyl (DPPH), deoxyribose degradation and plasmid relaxation assays in a cell-free system. DNA damage click here studies were performed using a single cell gel electrophoresis (SCGE) assay and micronuclei (MN) formation. Moreover, the alterations in lipid peroxidation and antioxidant enzymes were measured by biochemical methods.

Results: EE-NS showed significant free radical scavenging and protection against DNA XAV939 damage in cell free systems. Ex vivo treatment of mouse splenic lymphocytes with an ethanolic extract of N. sativa 1 h prior to irradiation (2 Gy) showed significant prevention of the formation of lipid-peroxides and intracellular reactive oxygen species (ROS), which correlated with radiation-induced

apoptosis. Moreover, radiation-induced DNA damage was significantly prevented in splenocytes pre-treated with EE-NS. Swiss albino mice fed orally with the different doses of EE-NS (0-100 mg/kg bw) for five consecutive days followed by 2 Gy whole body irradiation (WBI) showed significant protection against oxidative injury to spleen and liver as measured by lipid peroxidation and the activity of antioxidant enzymes. These results were correlated with the prevention of DNA damage as measured by bone marrow micronuclei assay. Our results suggest that oral feeding of extract resulted in increased survival in mice exposed to WBI (7.5 Gy).

Conclusion: The results obtained from the different experimental systems suggest the radioprotective ability of EE-NS involving prevention of radiation-induced oxidative damage.

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