Characterization of Zebrafish Abcc4 as an Efflux Transporter of Organochlorine Pesticides

Lu, X., Long, Y., Lin, L., Sun, R., Zhong, S., Cui, Z.
PLoS One   9: e111664 (Journal)
Registered Authors
Cui, Zongbin, Long, Yong
Embryos, DDT, Zebrafish, Pesticides, Detoxification, Gene expression, RNA extraction, Excretion
MeSH Terms
  • Animals
  • DDT/toxicity
  • Gene Expression Regulation, Developmental/drug effects*
  • Hexachlorocyclohexane/toxicity
  • Humans
  • Hydrocarbons, Chlorinated/toxicity
  • LLC-PK1 Cells
  • Multidrug Resistance-Associated Proteins/biosynthesis*
  • Multidrug Resistance-Associated Proteins/genetics
  • Oocytes/drug effects*
  • Pesticides/toxicity
  • Swine
  • Zebrafish/genetics
  • Zebrafish/growth & development
  • Zebrafish Proteins/biosynthesis*
  • Zebrafish Proteins/genetics
25478949 Full text @ PLoS One
DDT and lindane are highly toxic organochlorine pesticides and posing adverse effects on the environment and public health due to their frequent usage in developing countries. ABCC4/MRP4 is an organic anion transporter that mediates cellular efflux of a wide range of exogenous and endogenous compounds such as cyclic nucleotides and anti-cancer drugs; however, it remains unclear whether ABCC4 and its orthologs function in the detoxification of organochlorine pesticides. Here, we demonstrated the roles of zebrafish Abcc4 in cellular efflux of DDT and lindane. Zebrafish abcc4 was maternally expressed in the oocytes and its transcripts were detected in the lens, pancreas, gills, liver, intestine and bladder of developing embryos and in adult tissues examined. DDT and lindane were able to induce the expression of abcc4 gene and overexpression of Abcc4 significantly decreased the cytotoxicity and accumulation of DDT and lindane in LLC-PK1 cells and developing embryos. In contrast, overexpression of an Abcc4-G1188D mutant abolished its transporter function without effects on its substrate binding activity, and sensitized LLC-PK1 cells and developing embryos to toxic pesticides. Moreover, glutathione (GSH) was involved in the efflux of cellular pesticides and ATPase activity in developing embryos can be induced by DDT or lindane. Thus, zebrafish Abcc4 plays crucial roles in cellular efflux of organochlorine pesticides and can be used a potential molecular marker for the monitor of DDT and lindane contamination in the aquatic environment.
Genes / Markers
Show all Figures
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Engineered Foreign Genes