Protein Information

Name chloride channel (protein family or complex)
Synonyms chloride channel

Compound Information

Name piperonyl butoxide
CAS 5-[[2-(2-butoxyethoxy)ethoxy]methyl]-6-propyl-1,3-benzodioxole

Reference List

PubMed Abstract RScore(About this table)
8054658 Bloomquist JR: Cyclodiene resistance at the insect GABA receptor/chloride channel complex confers broad cross resistance to convulsants and experimental phenylpyrazole insecticides. Arch Insect Biochem Physiol. 1994;26(1):69-79.

Toxicological studies were performed with a sucrose bait assay containing the synergist piperonyl butoxide.
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17461080 Nguyen SN, Song C, Scharf ME: Toxicity, synergism, and neurological effects of novel volatile insecticides in insecticide-susceptible and -resistant Drosophila strains. J Econ Entomol. 2007 Apr;100(2):534-44.


In addition to a susceptible strain (Canton-S), three mutant strains were tested that included a strain resistant by P450-based metabolism (Hikone-R) and two resistant neurological mutant strains; one voltage-gated sodium channel mutant (para (ts-1)) and one GABA-gated chloride channel mutant (Rdl).
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9860498 Hainzl D, Cole LM, Casida JE: Mechanisms for selective toxicity of fipronil insecticide and its sulfone metabolite and desulfinyl photoproduct. Chem Res Toxicol. 1998 Dec;11(12):1529-35.

Fipronil, an N-phenylpyrazole with a trifluoromethylsulfinyl substituent, initiated the second generation of insecticides acting at the gamma-aminobutyric acid (GABA) receptor to block the chloride channel.
The P450 inhibitor piperonyl butoxide, acting in houseflies, increases the metabolic stability and effectiveness of fipronil and the sulfone but not those of the desulfinyl compound, and in mice it completely blocks the sulfoxide to sulfone conversion without altering the poisoning.
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