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• W2298154057 abstract "The aging process involves the reduction in the production of the major components of skin tissue. During intrinsic aging and photoaging processes, in dermis of human skin, fibroblasts become senescent and have decreased activity, which produce low levels of collagen. Moreover, there is accumulation of advanced glycation end products (AGEs). AGEs have incidence in the progression of age-related diseases, principally in diabetes mellitus and in Alzheimer's diseases. AGEs causes intracellular damage and/or apoptosis leading to an increase of the free radicals, generating a crosslink with skin proteins and oxidative stress. The aim of this study is to detect AGEs markers on human skin by in vivo Confocal Raman spectroscopy. Spectra were obtained by using a Rivers Diagnostic System, 785 nm laser excitation and a CCD detector from the skin surface down to 120 μm depth. We analyzed the confocal Raman spectra of the skin dermis of 30 women volunteers divided into 3 groups: 10 volunteers with diabetes mellitus type II, 65–80 years old (DEW); 10 young healthy women, 20–33 years old (HYW); and 10 elderly healthy women, 65–80 years old (HEW). Pentosidine and glucosepane were the principally identified AGEs in the hydroxyproline and proline Raman spectral region (1000–800 cm–1), in the 1.260–1.320 cm–1 region assignable to alpha-helical amide III modes, and in the Amide I region. Pentosidine and glucosepane calculated vibrational spectra were performed through Density Functional Theory using the B3LYP functional with 3-21G basis set. Difference between the Raman spectra of diabetic elderly women and healthy young women, and between healthy elderly women and healthy young women were also obtained with the purpose of identifying AGEs Raman bands markers. AGEs peaks and collagen changes have been identified and used to quantify the glycation process in human skin." @default.
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• W2298154057 date "2016-03-07" @default.
• W2298154057 modified "2023-09-23" @default.
• W2298154057 title "Detection of advanced glycation end products (AGEs) on human skin by in vivo confocal Raman spectroscopy" @default.
• W2298154057 cites W2029388843 @default.
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• W2298154057 doi "https://doi.org/10.1117/12.2213323" @default.
• W2298154057 hasPublicationYear "2016" @default.
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