Toxic Identification and Evaluation of Androgen Receptor Antagonistic Activities in Acid-Treated Liver Extracts of High-Trophic Level Wild Animals from Japan

Environ Sci Technol. 2015 Oct 6;49(19):11840-8. doi: 10.1021/acs.est.5b02288. Epub 2015 Sep 11.

Abstract

Sulfuric acid-treated liver extracts of representative high-trophic level Japanese animals were analyzed by toxic identification and evaluation (TIE) with chemically activated luciferase expression (CALUX) and chemical analysis to elucidate androgen receptor (AR) antagonistic activities and potential contributions of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs). The activities were detected in striped dolphins (n = 5), Stejneger's beaked whales (n = 6), golden eagle (n = 1), and Steller's sea eagle (n = 1) with CALUX-flutamide equivalents (FluEQs) as follow: 38 (20-52), 47 (21-96), 5.0, and 80 μg FluEQ/g-lipid, respectively. The AR antagonism was detected in limited number of specimens at lower levels for finless porpoise, raccoon dog, and common cormorant. Theoretical activities (Theo-FluEQs) were calculated using the concentration of OCPs and PCBs and their IC25-based relative potency (REP) values. These total contribution to CALUX-FluEQ was 126%, 84%, 53%, 55%, and 44% for striped dolphin, Steller's sea eagle, Stejneger's beaked whale, finless porpoise, and golden eagle, respectively, and the main contributor was p,p'-DDE. However, most of the activities for raccoon dog (7.6%) and common cormorant (17%) could not be explained by OCPs and PCBs. This suggests other unknown compounds could function as AR antagonists in these terrestrial species.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Androgen Receptor Antagonists / analysis*
  • Androgen Receptor Antagonists / metabolism
  • Animals
  • Animals, Wild / metabolism
  • Birds
  • Dichlorodiphenyl Dichloroethylene / analysis
  • Eagles
  • Ecotoxicology / methods*
  • Environmental Monitoring / methods
  • Food Chain
  • Hydrocarbons, Chlorinated / analysis
  • Hydrocarbons, Chlorinated / toxicity
  • Japan
  • Liver Extracts / analysis*
  • Liver Extracts / metabolism
  • Pesticides / analysis*
  • Pesticides / toxicity
  • Polychlorinated Biphenyls / analysis
  • Polychlorinated Biphenyls / toxicity
  • Porpoises
  • Raccoon Dogs
  • Receptors, Androgen / metabolism
  • Water Pollutants, Chemical / analysis
  • Water Pollutants, Chemical / metabolism
  • Water Pollutants, Chemical / toxicity
  • Whales / metabolism

Substances

  • Androgen Receptor Antagonists
  • Hydrocarbons, Chlorinated
  • Liver Extracts
  • Pesticides
  • Receptors, Androgen
  • Water Pollutants, Chemical
  • Dichlorodiphenyl Dichloroethylene
  • Polychlorinated Biphenyls