The influence of diethyl-m-toluamide (DEET) on the percutaneous absorption of permethrin and carbaryl

被引:40
作者
Baynes, RE [1 ]
Halling, KB [1 ]
Riviere, JE [1 ]
机构
[1] N CAROLINA STATE UNIV,COLL VET MED,CTR CUTANEOUS PHARMACOL & TOXICOL,RALEIGH,NC 27606
关键词
D O I
10.1006/taap.1997.8156
中图分类号
R9 [药学];
学科分类号
1007 ;
摘要
Simultaneous exposure to DEFT and permethrin was recently proposed to be associated with the ''Gulf War Syndrome.'' However, no studies have reported the percutaneous absorption of DEET and permethrin when applied simultaneously to the skin as a mixture, the relevant route of exposure in the Persian Gulf, The present study quantitates percutaneous absorption of DEET and permethrin after coadministration to rodent and pig skin in vitro, Dosing solutions were also prepared with either acetone. dimethyl sulfoxide (DMSO), or ethanol to compare vehicle effects on percutaneous absorption of permethrin and DEET, The influence of DEET on carbaryl absorption and dermal disposition was also assessed in pig studies to statistically demonstrate DEET effects in acetone or DMSO and different solvent concentrations, Topical application of permethrin + DEET resulted in absorption of DEET (1-20% dose), but no permethrin, Permethrin (1.2-1.7% dose) was detected only when mouse skin was dosed solely with permethrin, a finding suggesting that DEET decreased permethrin absorption, DEET also inhibited carbaryl absorption in acetone mixtures, but had no effect on DMSO mixtures, Irrespective of solvent, DEET did not enhance carbaryl penetration into skin, For DEETI absorption was greater in mouse skin (10.7-20.6% dose) than in rat skin (1.1-5.2% dose) and pig skin (2.8% dose), The extent of DEET absorption was greater with DMSO and acetone than with ethanol in rat and mouse skin. These studies support DEET, but not permethrin or carbaryl, as hating sufficient systemic exposure to potentially cause signs of toxicity when simultaneously applied with pesticides, Furthermore, these studies demonstrated that DEET does not necessarily enhance dermal absorption of all toxicants as was originally hypothesized. (C) 1997 Academic Press.
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页码:332 / 339
页数:8
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