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首页> 外文期刊>Archives of Toxicology >Influence of water dilution on percutaneous absorption of N-vinyl-2-pyrrolidone in vivo and ex vivo in rats and ex vivo in humans
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Influence of water dilution on percutaneous absorption of N-vinyl-2-pyrrolidone in vivo and ex vivo in rats and ex vivo in humans

机译:水稀释对大鼠体内和离体N-乙烯基-2-吡咯烷酮体内和离体的经皮吸收的影响

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摘要

N-vinyl-2-pyrrolidone (NVP) is mainly used as a monomer in the production of polyvinylpyrrolidone or copolymers. Percutaneous absorption is an important source of exposure in the work environment. However, few studies have investigated this route of absorption. In this study, percutaneous absorption of neat or aqueous NVP solutions was measured in vivo and ex vivo in rats, and ex vivo in humans. Penetration and absorption fluxes were very similar following in vivo exposure to neat NVP (0.54 and 0.43 mg/cm(2)/h, respectively). Exposing rats to a 50 % aqueous solution of NVP increased both fluxes threefold (to 1.48 and 1.55 mg/cm(2)/h, respectively). Ex vivo, the absorption flux increased with solutions from 10 to 25 % of NVP, reached a plateau (between 25 and 50 % in rat, 25 and 75 % in human) and then decreased with neat NVP. In vivo and ex vivo absorption fluxes measured using rat skin were similar, supporting the hypothesis that the ex vivo measurements were a good representation of what was observed in vivo. Thus, for humans, the ex vivo measurements are likely the same as would be determined in vivo.
机译:N-乙烯基-2-吡咯烷酮(NVP)主要用作聚乙烯吡咯烷酮或共聚物生产中的单体。经皮吸收是工作环境中暴露的重要来源。但是,很少有研究研究这种吸收途径。在这项研究中,在大鼠体内和离体中以及人体内离体测量了纯净或NVP水溶液的经皮吸收。体内暴露于纯净NVP后的渗透和吸收通量非常相似(分别为0.54和0.43 mg / cm(2)/ h)。将大鼠暴露于NVP的50%水溶液中会使两种通量增加三倍(分别达到1.48和1.55 mg / cm(2)/ h)。离体时,吸收通量在溶液中的含量从NVP的10%上升到25%,达到平稳状态(在大鼠中介于25%和50%之间,在人中介于25%和75%之间),然后随着纯净NVP而下降。使用大鼠皮肤测得的体内和离体吸收通量相似,支持以下假设:离体测量很好地代表了体内观察到的情况。因此,对于人类而言,离体测量可能与体内测定的结果相同。

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