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通过分子生物学、组织学及临床检测手段对比研究视黄醇和视黄酸作用在人体皮肤上的功效
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摘要
目的:全反式视黄醇是视黄酸的前体,且是有效的抗衰老成分,被广泛应用于皮肤护理产品中。相比之下,视黄酸通常被认为具有更好的抗衰老效果,但关于直接对比视黄醇和视黄酸对皮肤功效的研究非常有限。通过研究,对比视黄醇和视黄酸对皮肤结构,以及与皮肤功能相关的基因和蛋白质表达的影响。此外,检测视黄醇治疗对皮肤外观的作用效果。方法:通过HE染色和体内共焦显微镜进行皮肤组织学检查。此外,通过RT-PCR与免疫组化的方法分析皮肤基因与蛋白的表达水平。视黄醇改善皮肤外观效果评估是使用基于皱纹分析的图像分析方法进行的。结果:通过4周的视黄醇和视黄酸的使用,表皮厚度增加,真皮内胶原蛋白基因1型(COL1A1)和3型(COL3A1)以及他们对应的Ⅰ型、Ⅲ型前胶原蛋白表达都得到增加。同时,面部图像分析显示使用视黄醇12周后,面部皱纹呈现显著下降。结论:研究结果表明,如皮肤活检和无创图像分析所示,局部应用视黄醇可显著影响到表皮与真皮的细胞分子特性。虽然幅度相对较小,但视黄醇也如同视黄酸一样表达出类似的皮肤组织学以及基因和蛋白质表达的变化。
Objectives:All-trans retinol,a precursor of retinoic acid,is an effective anti-aging treatment widely used in skin care products.In comparison,topical retinoic acid is believed to provide even greater anti-aging effects;however,there is limited research directly comparing the effects of retinol and retinoic acid on skin.In this study,we compare the effects of retinol and retinoic acid on skin structure and expression of skin function-related genes and proteins.We also examine the effect of retinol treatment on skin appearance.Methods:Skin histology was examined by H&E staining and in vivo confocal microscopy.Expression levels of skin genes and proteins were analyzed using RT-PCR and immunohistochemistry.The efficacy of a retinol formulation in improving skin appearance was assessed using digital image-based wrinkle analysis.Results:Four weeks of retinoic acid and retinol treatments both increased epidermal thickness,and upregulated genes for collagen type 1(COL1A1),and collagen type 3(COL3A1) with corresponding increases in procollagen Ⅰ and procollagen Ⅲ protein expression.Facial image analysis showed a significant reduction in facial wrinkles following 12 weeks of retinol application.Conclusions:The results of this study demonstrate that topical application of retinol significantly affects both cellular and molecular properties of the epidermis and dermis,as shown by skin biopsy and noninvasive imaging analyses.Although the magnitude tends to be smaller,retinol induces similar changes in skin histology,and gene and protein expression as compared to retinoic acid application.These results were confirmed by the significant facial anti-aging effect observed in the retinol efficacy clinical study.
引文
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