1,2,3,6,7,8-Hexachlorodibenzofuran

1,2,3,6,7,8-Hexachlorodibenzofuran (1,2,3,6,7,8-HxCDF) is a dioxin-like polychlorinated dibenzofuran (PCDF). 1,2,3,6,7,8-Hexachlorodibenzofuran induces expression of the genes encoding aryl hydrocarbon hydroxylase (AHH) and ethoxyresorufin-O-deethylase (EROD) in H-4-II-E rat hepatoma cells (EC50s = 1.47 and 1.24 nM, respectively). 1,2,3,6,7,8-Hexachlorodibenzofuran reduces weight, induces thymic atrophy, and induces the expression of genes encoding the cytochrome P450 (CYP) isoform CYP1A1 and 4-chlorobiphenyl hydroxylase in rats (EC50s = 3.2, 0.9, 0.35, and 0.21 µmol/kg, respectively)[1][2][3].

[1]Harnly M, et al. Polychlorinated Dibenzo-p-dioxin and Dibenzofuran Contamination at Metal Recovery Facilities, Open Burn Sites, and a Railroad Car Incineration Facility. Environ Sci Technol. 1995 Mar 1;29(3):677-84.|[2]Mason G, et al. Polychlorinated dibenzofurans (PCDFs): correlation between in vivo and in vitro structure-activity relationships. Toxicology. 1985 Oct;37(1-2):1-12.|[3]Bandiera S, et al. Polychlorinated dibenzofurans (PCDFs): effects of structure on binding to the 2,3,7,8-TCDD cytosolic receptor protein, AHH induction and toxicity. Toxicology. 1984 Aug;32(2):131-44.