Saratov JOURNAL of Medical and Scientific Research

Ushakova O.V.

Saratov State Technical University n.a. Yu.A. Gagarin, Candidate of Physical and Mathematical Sciences

Different reaction of core histones H2A and H2B to the red laser radiation

Year: 2017, volume 13 Issue: №3 Pages: 469-472
Heading: Physiology and Pathophysiology Article type: Original article
Authors: Brill G.E., Egorova A.V., Bugaeva I.O., Ushakova O.V., Matyushkina O.L.
Organization: Saratov State Medical University, Yuri Gagarin State Technical University of Saratov
Summary:

Aim: to investigate the influence of red laser irradiation on the processes of self-assembly of core histones H2A and H2B. Material and Methods. Solutions of human histone proteins were used in the work. Self-assembly was studied by the method of wedge dehydration. Image facies analysis consisted in their qualitative characterization and calculation of quantitative indicators with subsequent statistical processing. Results. It was established that linearly polarized laser light of the red region of the spectrum (A=660 nm, 1 J/cm2) significantly modifies the process of self-assembly of core histone H2B, while the structure of the facies of H2A histone changing to a lesser extent. Conclusion. Red laser radiation influences on the on the processes of self-assembly of core histones H2A and H2B. There is a differential sensitivity of different classes of histones to laser action. Histone proteins used in the experiments are present in the form of aqueous salt solutions. Red light realizes the effect seems to be due to the formation of singlet oxygen by direct laser excitation of molecular oxygen.

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Benefits of optical coherence tomography for imaging of skin diseases

Year: 2015, volume 11 Issue: №3 Pages: 392-396
Heading: Dermatovenerology Article type: Short message
Authors: Utz S.R., Zimnyakov D.A., Galkina E.M., Yuvchenko S.A., Alonova I.V., Artemina E.M., Ushakova O.V.
Organization: Saratov State Medical University, Saratov State Technical University n.a. Yu.A. Gagarin
Summary:

Aim: working out the methods of visualization of information obtained during optical coherent tomography in normal skin and in series of inflammatory disorders. Materials and Methods. OCS1300SS (made in Thorlabs, USA) was used in which the source of emission of radiation was a super-luminiscent diode with mean wavelength of 1325 nm. 12 patients with different skin conditions and 5 virtually healthy volunteers were examined with ОСТ procedure in OPD and IPD settings. High resolution USG numerical system DUB (TPM GmbH, Germany) was used for comparative USG assessment. Results. ОСТ demonstrated considerably more detailed picture of the objects scanned compared to USG investigation. Image obtained with the help of ОСТ contains vital information about sizes of macro-morphological elements, status of vascular elements and their density in different depths of the skin. Conclusion. Additional results obtained from ОСТ of the skin lesions in plane section improves attraction for ОСТ in practical dermatology.

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Low coherence re-flectometry of skin: benefits for skin imaging

Year: 2015, volume 11 Issue: №3 Pages: 376-380
Heading: Dermatovenerology Article type: Short message
Authors: Zimnyakov D.A., Utz S.R., Galkina E.M., Yuvchenko S.A., Alonova I.V., Artemina E.M., Ushakova O.V.
Organization: Saratov State Medical University, Saratov State Technical University n.a. Yu.A. Gagarin
Summary:

Goal: to examine the effectiveness of use low coherent reflectometry method for diagnostic purposes in clinical dermatology. Materials and methods. For measurements optical coherence tomography OCS1300SS (Thorlab, USA) with swiped frequency was used. 12 patients with different skin diseases were studied (psoriasis, acne, scleroderma, etc.). Results. Distinct border was detected between layers with different optical characteristics (and structure) at a depth of 1000 m to 2000 microns for majority of the samples studied. It is important to note that a good regerneration of distribution of the interference signal during transmission from one section to another and close to an exponential decay of signal with an increase in depth of probing. Conclusion. As a criterion of pathological changes,may be proposed the degree of spatial uniformity in distribution decay constant of interference signal in depth obtained with help of low coherent reflectometry (in vivo).

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