可见光诱导色素化:在9个随机对照试验中改进了30种产品的体内测试方法,以测量30种产品的有效性,并与体外评估相关
Pascale Renoux1, Hussein Jouni2, Clément Laloux3
1L'Oréal Research and Innovation, Chevilly Larue, France.
Experimental dermatology
|September 9, 2025
概括
新的方法可靠地评估防晒对可见光 (VL) 诱导的超色素的有效性. 这些经过验证的方法改善了保护因子计算,并预测了产品性能,确保了更好的化品配方.
科学领域:
- 皮肤病学和光生物学
- 化品科学与配方 化品科学与配方
- 生物统计学和临床试验设计
背景情况:
- 紫外线 (UV) 和可见光 (VL) 加剧了超颜色,因此需要具有宽光谱UV和VL阻能力的防晒.
- 评估VL诱导色素的现有方法,包括体内保护因子 (pVL-PF) 确定和体内传播率,在范围和统计学严谨性方面存在局限性.
研究的目的:
- 加强和验证现有的方法来评估防晒对可见光诱导色素的有效性.
- 建立可靠的体内和体外试验协议,以评估化品中的VL保护.
主要方法:
- 进行了9个单心,双盲,随机控制的体内研究,包括188名志愿者和30种产品.
- 在2个独立实验室中采用了使用传导度测量的体外方法.
- 利用统计贝叶斯方法来分析色素的动态,考虑到动力和个体间的变化.
主要成果:
- 改进的pVL-PF计算方法表明,颜料含量和VL保护水平之间存在很强的相关性.
- 统计分析证实,在30种测试产品中,有24种产品显著减少了VL诱导的色素.
- 研究发现,体外传导率的降低对体内疗效的高预测性.
结论:
- 一个精细的pVL-PF计算和统计指标提供了对VL诱导色素的染色产品疗效的可靠评估.
- 开发的 in vitro 方法可以作为 in vivo 性能的可靠预测指标,简化产品评估.
- 这些经过验证的方法对于评估化品配方是有价值的,并可能有利于研究其他VL加重的疾病.
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