Reactivity of DC biosensor clone to diverse stimuli. The XS106-pIL1-YFP DC clone was incubated for 16 hours with each test agent at the indicated concentrations and then examined for YFP expression (mean ± SD; n = 3). Asterisks indicate statistically significant YFP up-regulation compared with the nontreated samples (*P < .05, **P < .01). Data shown are representative of 3 independent experiments producing similar results.