New triterpenoid saponin from the aerial part of Welw ex. Bak. (Fabaceae) and their antibacterial activities.

The chemical investigation of the aerial part of led to isolation of a new triterpenoid glycoside named Canescensoside () and four known compounds including longispinogenin-3---D-glucuronopyranoside (), -sitosterol-3---D-glucoside (), apigenin-7---D-glucopyranoside () and apigenin-7--[-L-rhamnopyranosyl-(1→3)--D-glucopyranoside] (). Structures of compounds were assigned by interpretation of their spectral data, mainly 1D and 2D NMR, HRESIMS, and by comparison with the reported data. The MeOH extract, EtOAc and -BuOH fractions as well as isolated compounds were tested for their antibacterial activities against four bacteria strains among which, two Gram-negative ( ATCC 76110 and ATCC 8739) and two Gram-positive ( ATCC 29212 and ATCC 25923) bacteria using the broth microdilution method.

Triterpene and Steroids from A. Rich (Onagraceae) Displayed Antimicrobial Activities and Synergistic Effects with Conventional Antibiotics.

Difficulties encountered in treating drug-resistant pathogens have created a need for new therapies. Synergistic combinations of antibiotics are considered as ideal strategies in combating clinical and multidrug-resistant (MDR) infections. In this study, the antimicrobial activities of triterpenes and steroids from A.

Antimicrobial and Antioxidant Secondary Metabolites from Chiov. (Fabaceae) and Their Mechanisms of Antibacterial Action.

The treatment of infectious diseases with antimicrobial agents continues to present problems in modern-day medicine with many studies showing significant increase in the incidence of bacterial resistance to several antibiotics. The screening of antimicrobial activity of plant extracts and natural products has shown that medicinal plants are made up of a potential source of new anti-infective agents. The aim of this study was to evaluate the antimicrobial and antioxidant activities of extracts and compounds from the whole plant Chiov.

Antibacterial, antifungal and antioxidant activities of whole plant chemical constituents of Rumex abyssinicus.

Background: Antibiotic resistance has contributed to the burden of infectious diseases both in the hospital and community setting, and represents a great threat to public health. Previous studies have revealed the role of reactive oxygen species as intermediate mediators of tissue damage, following antibiotherapies, indicating the need of associating antioxidants to these treatments. Therefore, the present work was designed to study the antibacterial, antifungal and antioxidant activities of extracts and compounds from Rumex abyssinicus Jacq.