Theoretical Approach for Physicochemical Factors Affecting Human Toxicity of Dioxins

다이옥신의 인체 독성에 영향을 미치는 물리화학적 인자에 대한 이론적 접근

  • 황인철 (서울대학교 자연과학대학 화학과) ;
  • 박형석 (서울대학교 자연과학대학 화학과)
  • Published : 1999.04.01

Abstract

Dioxins refer to a family of chemicals comprising 75 polychlorinated dibenzo-p-dioxin (PCDD) and 135 polychlorinated dibenzo-p-furan (PCDF) congeners, which may cause skin disorder, human immune system disruption, birth defects, severe hormonal imbalance, and cancer. The effects of exposure of dioxin-like compounds such as PCBs are mediated by binding to the aryl hydrocarbon receptor (AHR), which is a ligand-activated transcription factor. To grasp physicochemical factors affecting human toxicity of dioxins, six geometrical and topological indices, eleven thermodynamic variables, and quantum mechanical descriptors including ESP (electrostatic potential) were analyzed using QSAR and semi-empirical AM1 method. Planar dioxins with high lipophilicity and large surface tension show the probability that negative electrostatic potential in the lateral oxygen may make hydrogen bonding with DNA bases to be a carcinogen.