Program information center support concept design objects marine engineering

Рабочей группой проведены проектирование и разработка программного информационного комплекса поддержки концептуального проектирования объектов морской техники.Working Group held design and development of software-onnogo complex information support conceptual design objects of Marine nicknames

Antigenic features of the strains SARS-CoV-2 of omicron sublines assessed by hyperimmune mouse serum neutralisation

Introduction. The emergence and spread of new genetic variants of SARS-CoV-2 underlies periodic upsurge in COVID-19 incidence. It has been shown that the most rapidly spreading genetic variants of SARS-CoV-2 are resistant to antibodies specific to the previous variant of the SARS-CoV-2, thereby necessitating to analyze the antibody evasion ability of previously circulating variants for newly emerging subvariants. The aim of this work was to assess SARS-CoV-2 cross-reactivity of coronavirus strains belonging to different genetic subvariants of Omicron isolated in the territory of the Russian Federation in the period 2020–2023 in microneutralization reaction using hyperimmune mouse sera. Materials and methods. Mouse hyperimmune sera were obtained against 10 SARS-CoV-2 strains belonging to subvariants BA.1, BA.2, CH.1.1, BN.1, BA.5.1, CL.1.2, BA.5.2, BQ.1.2.1 XBB.1.5 and XBB.3. BALB/c mice were immunized with inactivated concentrated antigen mixed at 1:1 ratio with an adjuvant representing Quillaja saponaria saponin-based virus-like immunostimulatory complex. The antibody titer was determined by neutralization test. The neutralizing activity of the hyperimmune sera was analyzed against the relevant viruses as well as against previous genetic variants of SARS-CoV-2 (Wuhan, Alpha, Beta, Gamma, Delta). Results. Cross-reactivity for all Omicron-variant strains analyzed here was shown; the degree of cross-reactivity depended on the degree of inter-strain relatedness. A prominent cross-reactivity was observed for subvariants of BA.5 so that their neutralizing activity against recombinant SARS-CoV-2 lineages was markedly reduced. Neutralizing serum titers obtained for subvariants of BA.5 against genetic variants of SARS-CoV-2 isolated during the early periods of the pandemic are reduced more than 60-fold. Conclusion. The presented method for obtaining and using hyperimmune mouse sera for neutralization reaction allows the assessment of cross-reactivity for strains belonging to different SARS-CoV-2 subvariants

Anatomy, Chloroplast Structure and Compartmentation of Enzymes Relative to Photosynthetic Mechanisms in Leaves and Cotyledons of Species in the Tribe Salsoleae (Chenopodiaceae)

Certain members of the family Chenopodiaceae are the dominant species of the deserts of Central Asia; many of them are succulent halophytes which exhibit C4-type CO2 fixation of the NAD- or NADP-ME (malic enzyme) subgroup. In four C4 species of the tribe Salsoleae, the Salsoloid-type Kranz anatomy in leaves or stems was studied in relation to the diversity in anatomy which was found in cotyledons. Halocharis gossypina, has C4 NAD-ME Salsoloid-type photosynthesis in leaves and C3 photosynthesis in dorsoventral non-Kranz cotyledons; Salsola laricina has C4 NAD-ME Salsoloid-type leaves and C4 NAD-ME Atriplicoid-type cotyledons; Haloxylon persicum, has C4 NADP-ME Salsoloid-type green stems and C3 isopalisade non-Kranz cotyledons; and S. richteri has C4 NADP-ME Salsoloid-type leaves and cotyledons. Immunolocalization studies on Rubisco showed strong labelling in bundle sheath cells of leaves and cotyledons of organs having Kranz anatomy. The C4 pathway enzyme phosphoenolpyruvate carboxylase was localized in mesophyll cells, while the malic enzymes were localized in bundle sheath cells of Kranz-type tissue. Immunolocalization by electron microscopy showed NAD-ME is in mitochondria while NADP-ME is in chloroplasts of bundle sheath cells in the respective C4 types. In some C4 organs, it was apparent that subepidermal cells and water storage cells also contain some chloroplasts which have Rubisco, store starch, and thus perform C3 photosynthesis. In non-Kranz cotyledons of Halocharis gossypina and Haloxylon persicum, Rubisco was found in chloroplasts of both palisade and spongy mesophyll cells with the heaviest labelling in the layers of palisade cells, whereas C4 pathway proteins were low or undetectable. The pattern of starch accumulation correlated with the localization of Rubisco, being highest in the bundle sheath cells and lowest in the mesophyll cells of organs having Kranz anatomy. In NAD-ME-type Kranz organs (leaves and cotyledons of S. laricina and leaves of H. gossypina) the granal index (length of appressed membranes as a percentage of total length of all membranes) of bundle sheath chloroplasts is 1.5 to 2.5 times higher than that of mesophyll chloroplasts. In contrast, in the NADP-ME-type Kranz organs (S. richteri leaves and cotyledons and H. persicum stems) the granal index of mesophyll chloroplasts is 1.5 to 2.2 times that of the bundle sheath chloroplasts. The mechanism of photosynthesis in these species is discussed in relation to structural differences.This work was partly supported by Civilian Research and Development Foundation Grant RB1–264 and NSF Grant IBN-9807916. EV Voznesenskaya would like to thank CIES, Washington DC for a Fulbright Scholar Research Fellowship. We also thank the Electron Microscope Center of Washington State University for use of their facilities and staff assistance

RNA sequencing of single cells obtained from immunolabeled tumor sections: the first experience

We performed laser microdissection-assisted RNA sequencing of single cells of breast tumo

SNP-Based Chromosomal Microarray Analysis for Detecting DNA Copy Number Variations in Fetuses with a Thickened Nuchal Fold

The aim of the study was to assess the diagnostic potential of SNP-based chromosomal microarray analysis for detecting pathogenic copies number variations (CNVs) in fetuses with a normal karyotype, in which an increase in the nuchal translucence of >2.5 mm was detected by ultrasound at a gestational age of 11 weeks to 13 weeks 6 days. MATERIALS AND METHODS: The study included 225 pregnant women who underwent invasive prenatal diagnostic procedures following the detection of an isolated thickening of the fetal nuchal fold. The fetal material obtained was examined using a cytogenetic test; if a normal karyotype was confirmed, chromosomal microarray analysis was performed as a second-line test. RESULTS: Pathogenic CNVs were detected in 22 of 225 fetuses (9.8%) with a normal karyotype. Of these 22 fetuses, pathogenic CNVs not classified as syndromes were detected in 14 cases (63.6%), and those previously described as syndromes — in 8 cases (36.4%). In 9 fetuses (41%), CNVs in two non-homologous chromosomes were determined; these findings indicated a high likelihood of carrying balanced translocations in the parents. Indeed, when analyzing the parent’s karyotype, in 8 out of 9 couples, balanced translocations were found in one of the parents. CONCLUSION: Using chromosomal microarray analysis in fetuses with a thickened nuchal fold makes it possible to increase the ability to detect chromosomal imbalances, including those caused by pathological meiotic segregation of parental reciprocal translocation

STUDY OF CESIUM SORPTION BY IRON AND NICKEL FERROCYANIDES

Sorption of cesium on four commercially available iron and nickel ferrocyanides was studied in this work.It was shown that these ferrocyanides adsorb cesium at a wide pH range (0.5 – 12) with distribution coefficient of approximately 105 L kg-1

Variable clinic-EEG trajectories in male patients with <i>PCDH19</i> clustering epilepsy

Background. The association between the protocadherin-19 (PCDH19) gene and epilepsy suggests that the X-linked inherited form of its pathogenic variant affects only women. Recent data has described males with somatic mosaicism, whose clinical picture is similar to the common manifestations in females.Objective: to report on three new cases of PCDH19 clustering epilepsy in male patients.Material and methods. Clinical data were collected from different centers through personal communication between authors, which means that the structured cohort was not tested. For all patients a next generation sequencing-based custom epilepsy gene panel and whole-exome sequencing by NextSeq 500 (Illumina Inc., USA) were performed.Results. All patients had a previously described mosaic variants in PCDH19 gene (NM_001184880.1). According to the electroencefalographic data, all patients had a diffuse slowdown of the background rhythm, interictal regional/multiregional epileptiform activity and ictal focal pattern in the frontotemporal regions. Brain magnetic resonance imaging at the age of 3 years showed delayed myelination without focal abnormalities in 2 patients.Conclusion. Early recognition of the above features should improve early diagnosis and long-term management of patients with epilepsy and PCDH19 mutations