title: Anti-inflammatory, cyclooxygenase inhibitory and antioxidant activities of standardized extracts of Tridax procumbens L.
abstract: The standardized EtOAc, MeOH and 70% EtOH extracts of Tridax procumbens aerial parts showed significant inhibition of rat paw edema at a medium dose of 200mg/kg and the EtOAC extract was the most active. These extracts were standardized by HPLC with the help of chemical markers. Further, the extracts were evaluated for COX-1 and COX-2 inhibitory activity and EtOAc extract exhibited the highest inhibition of COX-1 and COX-2 at 50 μg/mL. Cent aurein, centaureidin and bergenin were isolated as COX-1 and COX-2 inhibitory principles from the EtOAc extract. The extracts also exhibited antioxidant activity against DPPH and ABTS free radicals. The anti-inflammatory activity of T. procumbens aerial parts could be at least in part due to COX-1, COX-2 enzyme inhibition and free radical-scavenging activities which may be attributed to the presence of flavonoids and other polyphenols in the extracts.
authors.affiliation: Department of Natural Products, National Institute of Pharmaceutical Education and Research, Sector-67, SAS Nagar, Mohali 160062, Punjab, India. sanjayjachak@niper.ac.in
authors.forename: Sanjay M
authors.initials: SM
authors.lastname: Jachak
authors.forename: Raju
authors.initials: R
authors.lastname: Gautam
authors.forename: C
authors.initials: C
authors.lastname: Selvam
authors.forename: Himanshu
authors.initials: H
authors.lastname: Madhan
authors.forename: Amit
authors.initials: A
authors.lastname: Srivastava
authors.forename: Taj
authors.initials: T
authors.lastname: Khan
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000302:isolation & purification / Q000494:pharmacology* / Q000627:therapeutic use; D019659:Asteraceae / Q000737:chemistry*; D052160:Benzothiazoles; D001713:Biphenyl Compounds / Q000378:metabolism; D002851:Chromatography, High Pressure Liquid; D016861:Cyclooxygenase Inhibitors / Q000302:isolation & purification / Q000494:pharmacology* / Q000627:therapeutic use; D004487:Edema / Q000188:drug therapy*; D005260:Female; D005419:Flavonoids / Q000302:isolation & purification / Q000494:pharmacology* / Q000627:therapeutic use; D010636:Phenols / Q000302:isolation & purification / Q000494:pharmacology* / Q000627:therapeutic use; D008517:Phytotherapy; D010851:Picrates / Q000378:metabolism; D035261:Plant Components, Aerial; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use; D059808:Polyphenols; D051381:Rats; D017207:Rats, Sprague-Dawley; D013451:Sulfonic Acids / Q000378:metabolism; D013844:Thiazoles / Q000378:metabolism
chemical_list: D000975:Antioxidants; D052160:Benzothiazoles; D001713:Biphenyl Compounds; D016861:Cyclooxygenase Inhibitors; D005419:Flavonoids; D010636:Phenols; D010851:Picrates; D010936:Plant Extracts; D059808:Polyphenols; D013451:Sulfonic Acids; D013844:Thiazoles; C002502:2,2'-azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid; C004931:1,1-diphenyl-2-picrylhydrazyl