[The prediction of SARS-CoV-2 main protease inhibition with filtering by position of ligand]

The paper analyzes a set of equations that adequately predict the IC50 value for SARS-CoV-2 main protease inhibitors. The training set was obtained using filtering by criteria independent of prediction of target value. It included 76 compounds, and the test set included nine compounds. We used the values of energy contributions obtained in the calculation of the change of the free energy of complex by MMGBSA method and a number of characteristics of the physical and chemical properties of the inhibitors as independent variables. It is sufficient to use only seven independent variables without loss of prediction quality (Q² = 0.79; R²prediction = 0.89). The maximum error in this case does not exceed 0.92 lg(IC50) units with a full range of observed values from 1.26 to 4.95.

[The bioinformatic identification of proteins with varying levels of post-translational modifications in experimental ischemic stroke in mice]

The experimental data obtained by Simats A. et al. (Molecular and Cellular Proteomics, 2020, 19(12), 1921-1936) was analysed using a bioinformatic approach. Original experimental results available in the ProteomeXchange database were obtained using a comprehensive multidomain approach to identify potential blood biomarkers in ischemic stroke in mice. The identification of peptides with post-translational modification (PTM) was performed by us using the raw data (accession code PXD016538). Only phosphorylation and deamination were considered as PTMs. Different combinations of data sets (ischemic tissue with intact tissue, ischemic tissue with control taken from mice after sham surgery, etc.) were compared both in terms of the ratio of abundance for the modified peptide to the unmodified variant and in terms of absolute values of abundance. The most likely change in precisely PTM levels was shown for 27 proteins, which include dynamin, glycogen phosphorylase and 70 kDa heat shock protein.

[Analysis of the oral cavity clinical immunological status in patients with chronic generalized mild and moderate parodontitis when treated with antibacterial means]

The article highlights the data about local immunity of the patients having cronic generalized periodontitis. Results of the conservative treatment with adhesive balm Asepta, gel Hyaludent with metronidazole and clorhexidine and Metrogyl Denta have shown the influence upon immunologic status of the patients.

[The excessive cerebrospinal fluid drainage syndrome as a complication of the surgical treatment of hydrocephalus]

The paper presents a clinical case of severe excess cerebrospinal spinal fluid drain syndrome with hematomas of the cerebral hemispheres being formed in a 18-year-old young man undergone ventriculoatriostomy with mean-pressure pump implantation. A complication occurred 6 months after surgery and ran progressively. Closed external drainage of hematomas greatly reduced their volumes, but deteriorated the patient's condition due to the development of excess drain syndrome. Replacement of the mean-pressure pump by a high-pressure one rapidly normalized the patient's status.