title: Paraquat detoxification with p-sulfonatocalix-[4]arene by a pharmacokinetic study.
abstract: The p-sulfonatocalix[n]arenes are supposed to show potential application in the clinical treatment of viologen poisoning. In the present study, p-sulfonatocalix[4]arene (C4AS), the most common derivative of p-sulfonatocalix[n]arenes, is used to study the antidotic mechanism for paraquat (PQ) by pharmacokinetics in vivo. A high-performance liquid chromatography (HPLC) method was established to determine the concentration of PQ in rat plasma. The results showed that the peak plasma concentration (C(max)) and area under the plasma concentration-time curve (AUC(0-t)) were significantly lower after C4AS intervention than in the PQ intoxication group. It was considered that C4AS has great effective detoxication to PQ poisoning, and the results of in vitro intestinal absorption studies showed that C4AS can inhibit the absorption of PQ via oral administration by forming a stable inclusion constant.
authors.affiliation: College of Traditional Chinese Medicine, TianJin University of Traditional Chinese Medicine, TianJin, China.
authors.forename: Gui-Fang
authors.initials: GF
authors.lastname: Wang
authors.forename: Xiao-Liang
authors.initials: XL
authors.lastname: Ren
authors.forename: Min
authors.initials: M
authors.lastname: Zhao
authors.forename: Xi-Long
authors.initials: XL
authors.lastname: Qiu
authors.forename: Ai-Di
authors.initials: AD
authors.lastname: Qi
mesh_terms: D000818:Animals; D019540:Area Under Curve; D047250:Calixarenes; D002851:Chromatography, High Pressure Liquid; D006540:Herbicides / Q000493:pharmacokinetics* / Q000633:toxicity; D008658:Inactivation, Metabolic; D007408:Intestinal Absorption; D008297:Male; D010269:Paraquat / Q000493:pharmacokinetics* / Q000633:toxicity; D010636:Phenols; D051381:Rats; D015203:Reproducibility of Results
chemical_list: D006540:Herbicides; D010636:Phenols; C511968:p-sulfonatocalix(4)arene; D047250:Calixarenes; D010269:Paraquat