Department of Dermatology, University of Wisconsin, Madison, Madison, WI, USA.
Curr Drug Targets. 2013 Sep;14(10):1128-34. doi: 10.2174/13894501113149990184.
Solar ultraviolet (UV) radiation, an ubiquitous environmental carcinogen, is classified depending on the wavelength, into three regions; short-wave UVC (200-280 nm), mid-wave UVB (280-320 nm), and long-wave UVA (320- 400 nm). The human skin, constantly exposed to UV radiation, particularly the UVB and UVA components, is vulnerable to its various deleterious effects such as erythema, photoaging, immunosuppression and cancer. To counteract these and for the maintenance of genomic integrity, cells have developed several protective mechanisms including DNA repair, cell cycle arrest and apoptosis. The network of damage sensors, signal transducers, mediators, and various effector proteins is regulated through changes in gene expression. MicroRNAs (miRNAs), a group of small non-coding RNAs, act as posttranscriptional regulators through binding to complementary sequences in the 3´-untranslated region of their target genes, resulting in either translational repression or target degradation. Recent studies show that miRNAs add an additional layer of complexity to the intricately controlled cellular responses to UV radiation. This review summarizes our current knowledge of the role of miRNAs in the regulation of the human skin response upon exposure to UV radiation.
太阳紫外线(UV)辐射是一种普遍存在的环境致癌物,根据波长可分为三个区域:短波 UVC(200-280nm)、中波 UVB(280-320nm)和长波 UVA(320-400nm)。人类皮肤经常暴露在 UV 辐射下,尤其是 UVB 和 UVA 成分,容易受到各种有害影响,如红斑、光老化、免疫抑制和癌症。为了对抗这些影响并维护基因组的完整性,细胞已经开发了几种保护机制,包括 DNA 修复、细胞周期停滞和细胞凋亡。损伤传感器、信号转导器、介质和各种效应蛋白的网络通过基因表达的变化来调节。微小 RNA(miRNA)是一组小型非编码 RNA,通过与靶基因 3'非翻译区的互补序列结合,作为转录后调节剂,从而导致翻译抑制或靶降解。最近的研究表明,miRNA 为细胞对 UV 辐射的复杂控制反应增加了一个额外的复杂层。本综述总结了我们目前对 miRNA 在调节人类皮肤对 UV 辐射暴露的反应中的作用的认识。