Adebayo, Salmon A.Shai, Leshweni J.Eloff, Jacobus Nicolaas2017-02-132017-02-132017-01Adebayo, SA, Shai, LJ & Eloff, JN 2017, 'First isolation of glutinol and a bioactive fraction with good anti-inflammatory activity from n-hexane fraction of Peltophorum africanum leaf', Asian Pacific Journal of Tropical Medicine, vol. 10, no. 1, pp. 42-46.1995-764510.1016/j.apjtm.2016.12.004http://hdl.handle.net/2263/59000OBJECTIVE : To investigate the anti-inflammatory activity of different fractions and glutinol (isolated compound), using nitric oxide synthase and cyclooxygenase (COX) inhibition as an indication of anti-inflammatory activity. METHODS : Anti-inflammatory activity was evaluated using an in vitro assay determining the inhibition of the activity of pro-inflammatory enzyme model. Cyclooxygenases and inducible nitric oxide synthase are crucial enzymes involved in the pathogenesis of many chronic inflammatory conditions. RESULTS : Sub-fraction F3.3 that was derived from n-hexane fraction of PA leaves significantly inhibited (P = 0.01) the catalytic activity of COX-2 (IC50 = 0.67 mg/mL) better than isolated compound, glutinol (IC50 = 1.22 mg/mL), compound 2 (CP2) (IC50 = 1.71 mg/mL) and sub-fraction F3.3.0 (IC50 = 1.30 mg/mL). A similar trend was observed in investigation of the inhibition of nitric oxide synthesis in RAW 264.7 cells by F3.3, glutinol, CP2 and F3.3.0. Inducible COX-2 and inducible nitric oxide synthase are among potent signalling enzymes that exacerbate inflammation. CONCLUSIONS : Bioactive sub-fractions (F3.3 and F3.3.0) derived from the n-hexane fraction of PA had good anti-inflammatory activity, and the isolated compound, and glutinol may be useful as a template for the development of new anti-inflammatory drugs.en© 2017 Hainan Medical University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.Anti-inflammatoryCyclooxygenases 2 (COX-2)Nitric oxide synthase (iNOS)Cyclooxygenases 1 (COX-1)Nitric oxide (NO)Peltophorum africanum (PA)Article