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Global marine pollutants inhibit P-glycoprotein: Environmental levels, inhibitory effects, and cocrystal structure
Nicklisch, S.C.T.; Rees, S.D.; McGrath, A.P.; Gökirmak, T.; Bonito, L.T.; Vermeer, L.M.; Cregger, C.; Loewen, G.; Sandin, S.; Chang, G.; Hamdoun, A. (2016). Global marine pollutants inhibit P-glycoprotein: Environmental levels, inhibitory effects, and cocrystal structure. Science Advances 2(4): e1600001. hdl.handle.net/10.1126/sciadv.1600001
In: Science Advances. AAAS: New York. ISSN 2375-2548, more
Peer reviewed article  

Available in Authors 

Keyword
    Marine

Authors  Top 
  • Nicklisch, S.C.T.
  • Rees, S.D.
  • McGrath, A.P.
  • Gökirmak, T.
  • Bonito, L.T.
  • Vermeer, L.M.
  • Cregger, C.
  • Loewen, G.
  • Sandin, S.
  • Chang, G.
  • Hamdoun, A.

Abstract
    The world’s oceans are a global reservoir of persistent organic pollutants to which humans and other animals are exposed. Although it is well known that these pollutants are potentially hazardous to human and environmental health, their impacts remain incompletely understood. We examined how persistent organic pollutants interact with the drug efflux transporter P-glycoprotein (P-gp), an evolutionarily conserved defense protein that is essential for protection against environmental toxicants. We identified specific congeners of organochlorine pesticides, polychlorinated biphenyls, and polybrominated diphenyl ethers that inhibit mouse and human P-gp, and determined their environmental levels in yellowfin tuna from the Gulf of Mexico. In addition, we solved the cocrystal structure of P-gp bound to one of these inhibitory pollutants, PBDE (polybrominated diphenyl ether)–100, providing the first view of pollutant binding to a drug transporter. The results demonstrate the potential for specific binding and inhibition of mammalian P-gp by ubiquitous congeners of persistent organic pollutants present in fish and other foods, and argue for further consideration of transporter inhibition in the assessment of the risk of exposure to these chemicals.

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