Репозиторий Университета

© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only. The development of express method for assessing the state of skin graft by the spectroscopic properties of tissue components involved in the healing of the affected skin or healing of skin grafts was carried out in present work. The proposed method for assessing the state of the skin by the spectroscopic properties of tissue components (using photosensitizers, fluorescent dyes (methylene blue and IcG) and nanophotosensitizers aluminum phthalocyanine nanoparticles (NP-AlPc) applied locally) will evaluate the physiological condition of the skin and assess the degree and rate of engraftment or rejection while also controlling several biochemical and physiological parameters in the entire graft, or the whole area of the skin lesions. Such parameters include the oxygenation of hemoglobin in the tissue microvasculature; the blood supply level; blood flow and lymph flow; assessment of intracellular metabolism; assessment of the cellular respiration type (aerobic/anaerobic).To assess the extent of inflammation the spectrally sensitive to biological environment nanoparticles of aluminum phthalocyanine (NP-AlPc) were also used.

© 2018 Lippincott Williams and Wilkins. All rights reserved. The objective of the present study was to evaluate the age-specific changes in the skin at the anterior forearm surface of the men based on the results of the examination of 100 masculine corpses at the age varying from 18 to 80 years with the application of the low invasive techniques. The ultrasonograms were used to identify the qualitative characteristics of each skin layer being visualized with special reference to the thickness and echogenic properties of dermis and epidermis. The following parameters of the age-related changes in the skin microrelief were considered to be of particular interest: Volume (the volume of skin irregularities), SR (skin roughness), SW (skin wrinkling), and SS (skin smoothness). The qualitative characteristics of the age-specific changes in the skin as well as the parameters of its relief recorded during the ultrasound scanning can be used to comprehensively evaluate its age-related condition for the purpose of determination of the biological age of non-identified individuals. The calculation of the squared coefficient of correlation between the age-specific parameters of the skin and their changes taking into consideration the autosolvability requirements made it possible to predict the subject's age with a mean error of around 2.22 years.

© 2018, Media Sphera Publishing Group. All rights reserved. The objective of the present work was the immunohistochemical evaluation of the age-related dynamics of apoptosis-associated proteins contained in the human skin epidermis. We studied the samples of skin tissues obtained during the forensic medical expertises of 100 corpses of the subjects who died in the consequence of acute blood loss in the absence of injuries or pathological changes in the skin (56 men and 44 women at the age varying from 5 to 85 years). The results of this study give evidence that the histoimmunological investigations of the skin tissues can be carried out with the use of the mmunohistochemical Ki67, bcl-2, and p53 markers for the more accurate determination of the biological age of the deceased subjects. The quantitative characteristics thus obtained serve as reliable indicators of the chronic changes in the skin and can be used as the components of the combined diagnostic procedures.