Histogram shows above is the effect of (A) Payena dasyphylla methanolic bark extract and (B) Payena dasyphylla ethyl acetate (EA) bark fraction on NHAC-kn cell viability. C; cells were cultured with medium alone and the rest are cells stimulated with 100 ng/ml IL-1β and treated with increasing concentration of plant extracts for 24 hours as indicated. The absorbance of MTT reduction was measured at a wavelength of 570 nm and the percentage of cell viability was measured against the control. The values are expressed as mean ± SEM in triplicates from three independent experiments (n = 3).
Citalingam et al. BMC Complementary and Alternative Medicine 2013 13:213 doi:10.1186/1472-6882-13-213