Antimicrobial and anti-inflammatory activities of three halophyte plants from Algeria and detection of some biomolecules by HPLC-DAD.

Antimicrobial activity of hydroalcoholic extracts (30/70) from leaves and stems of three halophytes (Tamarix africana, Arthrocnemum macrostachyum and Suaeda fruticose) was investigated. In vivo toxicological study and anti-inflammatory activity of leaf extract of T. africana were tested on carrageenan-induced inflammatory paw edema. T. africana possessed significant anti-inflammatory activity at 150 and 300 mg/kg confirmed by histological study of inflamed tissues. Six phenolic acids and 10 flavonoids where identified by HPLC-DAD. Gallic acid, Rutin and Kaempferol-3-O-glucoside were the major compounds. For the antibiotic assays, S. fruticosa leaf extract exhibited strong bactericidal power against S. aureus with MBC of 1.25 mg/mL whereas T. africana leaf and stem samples exhibited a significant bactericidal activity against S. aureus and B. subtilis compared to the negative control (Ampicillin and Chloramphenicol). Crude leaf and stem extracts from T. africana and stem extract from S. fruticosa exhibited a strong antifungal effect against C. albicans.

In vivo antiinflammatory activity and chemical composition of Hypericum scabroides.

OBJECTIVE: To evaluate the methanolic extracts of aerial parts of Hypericum scabroides (HSM) (200 mg/kg, p.o.) for in vivo anti-inflammatory activity. METHODS: The anti-inflammatory activity of HSM was tested in mice weighting (25±5) g. Either vehicle (control group), the methanolic extracts (200 mg/kg) or diclofenac (50 mg/kg), was administered (p.o.) for 60 min before an edema was induced in the mice paw by subcutaneous injection of carrageenin. The mouse-paw volume was measured 1 h, 3h and 6 h after injection of carrageenin. RESULTS: The HSM showed significant reduction of edema in carrageenan induced mice paw edema model at 1 h and 3 h for (78.03±15.54)% and (40.44±16.36)%, respectively. The diclofenac 50 mg/kg exhibited % reduction in paw volume (31.00±11.52)%, (0.80±0.09)% and (9.39±1.99)% after 1 h, 3 h and 6 h, respectively compared to control group. The obtained results revealed that HSM has significant anti inflammatory activity. Furethermore, the chemical composition of HSM was analyzed by using high performance liquid chromatography-diode array dedector. The plant contained pseudohypericin (trace) hypericin (trace), chlorogenic acid (0.014 0±0.000 5)%, rutin (0.005 0±0.000 6)%, hyperoside (0.016±0.005)%, isoquercitrin (0.034 0±0.000 5)% and kaempferol (trace). CONCLUSIONS: The obtained results of the present investigation revealed that methanol extract of Hypericum scarbroides has significant anti-inflammatory activity.