4-parameter variable-slope hill model in graphpad prism 8.0  (GraphPad Software Inc)

Journal: Toxicological Sciences

Article Title: Nonionic Ethoxylated Surfactants Induce Adipogenesis in 3T3-L1 Cells

doi: 10.1093/toxsci/kfx234

Figure Lengend Snippet: Ethoxylated Surfactants May Promote Adipogenesis via Inhibition of TRβ. Antagonist activity for the TRβ as measured via FRET reporter gene assay using the TRβ GeneBLAzer Reporter Assay as described in the Methods. Percent agonist TRβ activity for the T3 positive control relative to its maximum response (A), percent TRβ antagonism of intra-assay EC80 T3 (concentration that exhibits 80% of maximum T3 response; 0.3 nM) for various alkyl chain length ethoxylated surfactants (B), inhibition or enhancement of cell viability relative to vehicle control for various alkyl chain length ethoxylated surfactants (C), percent TRβ antagonism relative to intra-assay EC80 T3 for various ethoxylate chain length NPEOs (D), and inhibition or enhancement of cell viability relative to vehicle control for various ethoxylate chain length NPEOs (E). Data presented as mean ± SEM from 3 independent experiments. * indicates lowest concentration with significant antagonist activity relative to EC80 T3, p < .05, as per 1-way ANOVA and Dunnett’s posthoc test in GraphPad Prism 7.0.

Article Snippet: EC20/50 values were estimated using curves generated from raw fluorescence data using a 4-parameter variable-slope Hill model in GraphPad Prism 7.0.

Techniques: Inhibition, Activity Assay, Reporter Gene Assay, Reporter Assay, Positive Control, Intra Assay, Concentration Assay