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Purpose: To evaluate the ethanol extracts of the flowers, leaves, and stems of Centaurea tchihatcheffii Fischer & C.A. Meyer (Asteraceae) for their anti-inflammatory and analgesic activities in male Swiss albino mice. Methods: For the evaluation of anti-inflammatory activity, hind paw oedema was induced in the mice with carrageenan and prostaglandin-E2 (PGE 2) and the mice received either 100 and 200 mg/kg body weight doses of the flower extract or 200 mg/kg body weight dose of the leaf and stem extracts. Furthermore, ear oedema was induced in other groups of mice with 12-O-tetradecanoyl-13-acetate (TPA) and then administered with 0.5 mg/ear dose of the extract of either of the three plant parts. In order to evaluate analgesic activity, p-benzoquinone-induced abdominal constriction test was used with 100, 200 and 400 mg/kg body weight doses of the flower or 200mg/kg body weight dose of the leaf and stem extracts administered. Indomethacin and acetylsalicylic acid were the reference drugs for anti- inflamatory and analgesic evaluations, respectively. Phytochemical screening of the flower extract was carried out by thin layer chromatography (TLC). Results: The results of evaluation of the anti-inflammatory activities induced by carrageenan and PGE 2 showed that the flower extract diminished cyclo-oxygenase activitiy at the 200 mg/kg dose to the same level as the reference drug, indomethacin. However, no anti-inflamatory activity was seen in the TPA- induced ear oedema model. The extracts from all three parts of the plant showed analgesia in p- benzoquinone-induced abdominal constriction test. TLC analysis of the flower extract indicated the presence of sesquiterpen lactones, which may have been responsible for the analgesic activity. Conclusion: Our results support the use of C. tchihatcheffii in traditional medicine in Turkey for their anti-inflammatory and analgesic properties.

Assessment of the Extracts of Centaurea tchihatcheffii Fischer for Anti-inflammatory and Analgesic Activities in Animal Models