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【实验原理】
护肤产品的美白功效最主要的作用通路是通过抑制酪氨酸酶的活性,从而减少黑色素的生成来实现的,斑马鱼皮肤中的黑色素调控机制与人类高度保守,并且黑色素的生成速度快,在显微镜下能被肉眼清晰的观察到,通过图像处理技术可以对护肤产品对黑色素减少的程度进行定量,从而实现美白功效的评价。
【实验方法】
将斑马鱼分成若干组,含正常对照组和供试品组。正常对照组不做处理,供试品组使用受试化妆品,孵育一段时间后,对斑马鱼头部进行拍照,利用高级图像处理软件分析斑马鱼头部的黑色素信号强度;将斑马鱼进行匀浆处理,分别提取其中的酪氨酸酶和黑色素蛋白,进行OD值测定,通过皮肤黑色素信号强度、酪氨酸酶活性和黑色素蛋白的含量反映供试品的美白功效。
【评价指标】
1、皮肤黑色素信号强度
2、酪氨酸酶活性
3、黑色素蛋白含量
【结果展示】
(*展示图片仅供参考,实际实验组别依据合同而定)
图1. 斑马鱼头部黑色素表型图(蓝色为分析区域)
图2. 斑马鱼酪氨酸酶活力
图3. 斑马鱼黑色素蛋白含量
【评价结论】
1.供试品组与正常对照组对比,斑马鱼头部只有少量的黑色素。
2.经过对斑马鱼进行匀浆和蛋白质提取处理,可见供试品组与正常对照组相比,酪氨酸酶活性和黑色素蛋白含量均减少。
3.本实验证实了该化妆品具有美白的作用。
【参考文献】
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