The crude extracts from Bupleurum subovatum plant were used to screen the presence of secondary metabolic products, to estimate the total phenol content and free radical scavenging activity for the plant extracts. Methods:Antioxidant activity was evaluated by using 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) assay, while total phenol content was determined by using Folin Ciocalteu' s method. Result:The phytochemical analysis confirmed the presence of phenol, proteins, starch, reducing sugars, tannins, volatile oils, cardiac glycosides, steroid, and huge amounts of saponins. Total phenolic content in the methanolic extract was 9.05 mg/g Gallic acid. At the same time, methanolic extract showed a mild potential oxygen free radical scavenging ability as well as the IC50 for the plant was 18.60 ± 0.36 µg/ml, which justified its uses in the folkloric medicine and could be further subjected for the isolation of their therapeutic active compounds. Conclusion:The results of this study revealed the antioxidant activity and confirmed the therapeutic usage of Bupleurum subovatum in the traditional medicine.
Introduction:Viscum album is a semi-parasitic medicinal plant which has been used for many years as a remedy in traditional medicine. The plant is widely used in folk medicine in Palestine; mainly in the treatment of cancer, diabetes and heart disease. Since no previous reports on bioactivity of this plant in association with host plant specificity in Palestine, the current study aimed at evaluating bioactivity of almond and olive variants of this plant. Method: Methanolic extract of viscum album cultivated from almond and olive host plants were tested for antioxidant, antimicrobial . Prothrombin time (PT) and activated partial thromboplastin time (aPTT) were also used to assess anticoagulant activities of plant extracts. Result: The result demonstrated that Viscum album have an IC50 of 25.34±3.8μg/ml when hosted by olive while the IC50 was 15.37±2.2μg/ml when hosted by almond. Crude extracts of both Viscum album plants showed strong inhibition effects on the growth of the studied Staphylococcus aureus strains (ATCC 25923 and MRSA) with a pronounced effect when extracts of almond host was used. However, the effects of both host extracts were very limited or absent when tested against Gram-negative reference and clinical strains. Plant extracts of both host showed prolonged PT and PTT compared to phosphate buffered saline control solution. Conclusion: In conclusion, variations in the bioactivity of Viscum album is clearly influenced by host type and further studies required to illustrate such variations using other host plants.
New mono acid esters have been synthesized from the reaction of benzoic acid and mono-hydroxybenzoic acids with 2-phenoxyethanol separated from Urtica pilulifera, characterized, and screened for possible antioxidant, antifungal, antimicrobial and anticancer activities. 2-phenoxyethyl 4-hydroxy benzoate showed considerable activity against MCF-7 with IC50 is less than 62.5 µg/ml, and complete inhibition at a concentration less than 37.5 µg/ml against M. canis and less than 50 µg/ml against T. rubrum. On the other hand 2-phenoxyethyl 2-hydroxy benzoate reveals 70% of gentamicin against K. pneumoniae.
New mono acid esters have been synthesized from the reaction of benzoic acid and mono-hydroxybenzoic acids with 2-phenoxyethanol separated from Urtica pilulifera, characterized, and screened for possible antioxidant, antifungal, antimicrobial and anticancer activities. 2-phenoxyethyl 4-hydroxy benzoate showed considerable activity against MCF-7 with IC50 is less than 62.5 µg/ml, and complete inhibition at a concentration less than 37.5 µg/ml against M. canis and less than 50 µg/ml against T. rubrum. On the other hand 2-phenoxyethyl 2-hydroxy benzoate reveals 70% of gentamicin against K. pneumoniae.
New mono acid esters have been synthesized from the reaction of benzoic acid and mono-hydroxybenzoic acids with 2-phenoxyethanol separated from Urtica pilulifera, characterized, and screened for possible antioxidant, antifungal, antimicrobial and anticancer activities. 2-phenoxyethyl 4-hydroxy benzoate showed considerable activity against MCF-7 with IC50 is less than 62.5 µg/ml, and complete inhibition at a concentration less than 37.5 µg/ml against M. canis and less than 50 µg/ml against T. rubrum. On the other hand 2-phenoxyethyl 2-hydroxy benzoate reveals 70% of gentamicin against K. pneumoniae.
Rhus coriaria L. (Sumac), belonging to the Anacardiaceae family, is an important and most used species of the genus Rhus in the Mediterranean region since antiquity. Sumac has long been used as a flavoring spice, drink, appetizer, and as acidulant in food recipes; in addition to its use in traditional medicine. The role of plant in leather and textile industry is also significant. R. coriaria is very rich in phenolics mainly, tannins and flavonoids, in addition to its abundance in organic acids. The leaves and fruits of R. coriaria are recognized to have defensive and beneficial effects on a wide set of diseases including, but not limited to, diabetes mellitus, cancer, stroke, oral-diseases, inflammation, diarrhea, and dysentery. On the other hand, Sumac extracts were found to possess a potential antiviral, antimicrobial, antifungal, antioxidant and hypolipidemic activities. This review updates the current phytochemical, biological and therapeutic knowledge so far exist on R. coriaria. It also aims at highlighting the importance of Sumac extracts as a promising and potential source of functional ingredients and nutriceuticals with desirable bioactivities, prompting the further use of Sumac in food preservation, pharmacology and functional food industries.
New mono acid esters have been synthesized from the reaction of benzoic acid and mono-hydroxybenzoic acids with 2-phenoxyethanol separated from Urtica pilulifera, characterized, and screened for possible antioxidant, antifungal, antimicrobial and anticancer activities. 2-phenoxyethyl 4-hydroxy benzoate showed considerable activity against MCF-7 with IC50 is less than 62.5 µg/ml, and complete inhibition at a concentration less than 37.5 µg/ml against M. canis and less than 50 µg/ml against T. rubrum. On the other hand 2-phenoxyethyl 2-hydroxy benzoate reveals 70% of gentamicin against K. pneumoniae.
Diosmetin, 3′,5,7-trihydroxy-4′-methoxyflavone, is the aglycone of the flavonoid glycoside diosmin that occurs naturally in foods of plant origin. Diosmin exhibits antioxidant and anti-inflammatory activities, improves venous tone and it is used for the treatment of chronic venous insufficiency. Diosmin is hydrolyzed by enzymes of intestinal microflora before absorption of its aglycone diosmetin. A specific, sensitive, precise, accurate and robust HPLC assay for the determination of diosmetin in human plasma was developed and validated. Diosmetin and the internal standard 7-ethoxycoumarin were isolated from plasma by liquid–liquid extraction and separated on a C8reversed-phase column with methanol–water–acetic acid (55:43:2, v/v/v) as the mobile phase at 43°C. Peaks were monitored at 344 nm. The method was linear in the 10–300 ng/mL concentration range (r > 0.999). Recovery for diosmetin and internal standard was greater than 89.7 and 86.8%, respectively. Intra-day and inter-day precision for diosmetin ranged from 1.6 to 4.6 and from 2.2 to 5.3%, respectively, and accuracy was better than 97.9%. Copyright © 2004 John Wiley & Sons, Ltd.