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. Author manuscript; available in PMC: 2021 Jul 20.
Published in final edited form as: Chem Res Toxicol. 2020 Jun 18;33(7):1689–1697. doi: 10.1021/acs.chemrestox.9b00514

Table 2.

Summary of Inhibition of Microsomal Recombinant CYP2A6 by E-Liquid Flavoring Agents

Lowest
Concentration
Tested
Highest Concentration Tested Flavoring Agent IC50 of 3-cyano coumarin 7-hydroxylation IC50 95% confidence interval (lower limit-upper limit)
0.03 μM 500 μM Isoamyl Acetate > 500 μM --
0.03 μM 500 μM Vanillin 70.0 μM 46.5–164 μM
0.03 μM 500 μM Ethyl vanillin 69.4 μM 57.0–89.3 μM
0.03 μM 500 μM Benzaldehyde 3.0 μM 1.6–5.5 μM
0.03 μM 500 μM Cinnamaldehyde 1.1 μM 0.65–1.7 μM