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Context: Centaurea L. (Asteraceae) species used as herbal remedies in Turkish traditional medicine have shown several biological properties.

Objective: Extracts obtained from the aerial parts of Centaurea aphrodisea Boiss., Centaurea athoa DC., Centaurea hyalolepis Boiss., Centaurea iberica Trev. and Centaurea polyclada DC. were evaluated for their antioxidant, cytotoxic and anti-inflammatory activities.

Materials and methods: Extracts of Centaurea species were tested for their antioxidant activity in the 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid (ABTS) screening assays and for in vitro anti-inflammatory activity by Nf-κB and iNOS inhibition assays. The extracts were tested for their in vitro cytotoxicities against a panel of human solid tumor cell lines (SK-MEL: malignant melanoma, KB: oral epidermal carcinoma, BT-549: breast ductal carcinoma and SK-OV-3 …