Insect-specific irreversible inhibitors of acetylcholinesterase in pests including the bed bug, the eastern yellowjacket, German and American cockroaches, and the confused flour beetle

Gregory A. Polsinelli, Sanjay K. Singh, Rajesh K. Mishra, Robert Suranyi, David W. Ragsdale, Yuan Ping Pang, Stephen Brimijoin

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Insecticides directed against acetylcholinesterase (AChE) are facing increased resistance among target species as well as increasing concerns for human toxicity. The result has been a resurgence of disease vectors, insects destructive to agriculture, and residential pests. We previously reported a free cysteine (Cys) residue at the entrance to the AChE active site in some insects but not higher vertebrates. We also reported Cys-targeting methanethiosulfonate molecules (AMTSn), which, under conditions that spared human AChE, caused total irreversible inhibition of aphid AChE, 95% inhibition of AChE from the malaria vector mosquito (Anopheles gambia), and >80% inhibition of activity from the yellow fever mosquito (Aedes aegypti) and northern house mosquito (Culex pipiens). We now find the same compounds inhibit AChE from cockroaches (Blattella germanica and Periplaneta americana), the flour beetle (Tribolium confusum), the multi-colored Asian ladybird beetle (Harmonia axyridis), the bed bug (Cimex lectularius), and a wasp (Vespula maculifrons), with IC50 values of ∼1-11μM. Our results support further study of Cys-targeting inhibitors as conceptually novel insecticides that may be free of resistance in a range of insect pests and disease vectors and, compared with current compounds, should demonstrate much lower toxicity to mammals, birds, and fish.

Original languageEnglish (US)
Pages (from-to)142-147
Number of pages6
JournalChemico-biological interactions
Volume187
Issue number1-3
DOIs
StatePublished - Sep 1 2010

Keywords

  • Acetylcholinesterase
  • Agricultural pest
  • Disease vector
  • Inhibitor
  • Insecticide resistance
  • Methanethiosulfonate
  • Residential pest
  • Sulfhydryl group

ASJC Scopus subject areas

  • Toxicology

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