Features of Appendix and the Characteristics of Appendicitis Development in Children with COVID-19.

Background: Research on the subject of the influence of SARS-CoV-2 mechanisms on human homeostasis remains an actual problem. Particular interest is the study of pathomorphological changes in the appendix in children with COVID-19.

Objectives: Aim of this study: morphological and molecular biological evaluation of the appendix in children of different age groups with COVID-19.

Artificial intelligence (AI) for tumor microenvironment (TME) and tumor budding (TB) identification in colorectal cancer (CRC) patients: A systematic review.

Evaluation of the parameters such as tumor microenvironment (TME) and tumor budding (TB) is one of the most important steps in colorectal cancer (CRC) diagnosis and cancer development prognosis. In recent years, artificial intelligence (AI) has been successfully used to solve such problems. In this paper, we summarize the latest data on the use of artificial intelligence to predict tumor microenvironment and tumor budding in histological scans of patients with colorectal cancer.

[Experience of using dupilumab in the treatment of severe asthma].

The article provides data on modern approaches to the treatment of patients with severe uncontrolled bronchial asthma with an emphasis on the use of dupilumab, a human recombinant monoclonal antibody to the alpha subunit of the interleukin (IL)-4 receptor, which inhibits signal transmission from both IL-4 and IL-13. The results of dupilumab pivotal randomized clinical trials DRI12544, QUEST and VENTURE are summarized. Indications for use of this medicinal product are listed in Federal Clinical Guidelines on the management of asthma (year of revision 2019).

Oligonucleotide analogs with peptide internucleotide linkages.

Oligonucleotide analogs containing one or a few glycine, L-, and D-alanine or L-and D-phenylalanine residues instead of phosphodiesterinternucleotide linkages were synthesized. The stability of the duplexes formed by modified oligonucleotides and their wildtype complements was studied. Oligonucleotides with D-alanine residues in internucleotide linkages form duplexes more stable than native ones (ΔT(m) +0.

[Oligonucleotides with peptide internucleotide linkage. A novel class of modified oligonucleotides].

Oligonucleotide analogues with replacement of one or more internucleotide phosphodiester linkages with glycine, L- and D-alanine residues have been synthesized (C3'-NH-C(O)-CH(X)-NH-C(O)-C4', X = H, (S)-CH3 and (R)-CH3). The stability of the duplexes formed by the modified oligonucleotides and their wild-type complements have been studied. Incorporation of glycine and L-alanine residues have been shown to substantially decrease the stability the modified duplexes in comparison with that of the wild-type ones (DeltaT(m) approximately -2 degrees C per modification), while the analogs with D-alanine-containing linkages appeared to form duplexes with increased stability (DeltaT(m), approximately +0.