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- Pinchuk, N. V., et al.
(författare)
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Simulation of the influence of alloying elements on the characteristics of the formation of vacuum-arc nitride coatings
- 2023
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Ingår i: Functional Materials. - : National Academy of Sciences of Ukraine. - 1027-5495. ; 30:4, s. 597-605
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Tidskriftsartikel (refereegranskat)abstract
- An analysis of trends in the interaction of elements of the Periodic Table was carried out and the results obtained were compared with a model material (namely with a TiN coating); predictions were made for structure formation in vacuum-arc nitride coatings and modeling of the properties of the final coating depending on the composition and deposition conditions This made it possible to explain changes in structural characteristics and mechanical properties in the presence of weaker and/or stronger nitride-forming elements in nitride coatings. Under all deposition conditions and different elemental compositions, single-phase crystalline coatings were obtained. The addition of Mo to the coating increases the lattice period of TiMoN. It was es-tablished that the high-entropy coatings (TiVZrNbHf)N and (TiVZrNbHfTa)N are single-phase with an fcc lattice. The high entropy of the system prevents the formation of intermetallic com-pounds. The coatings are polycrystalline with a crystallite size of 20-23 nm. It has been estab-lished that high-entropy coatings obtained at a nitrogen atmosphere pressure of 0.26 Pa and a constant bias potential of -200 V have the highest hardness value of 53-55 GPa. The theoretical model used to analyze the characteristics of high-entropy alloys and nitride coatings based on them has been confirmed experimentally.
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- Berndt, Sonja, I, et al.
(författare)
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Distinct germline genetic susceptibility profiles identified for common non-Hodgkin lymphoma subtypes
- 2022
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Ingår i: Leukemia. - : Springer Nature. - 0887-6924 .- 1476-5551. ; 36:12, s. 2835-2844
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Tidskriftsartikel (refereegranskat)abstract
- Lymphoma risk is elevated for relatives with common non-Hodgkin lymphoma (NHL) subtypes, suggesting shared genetic susceptibility across subtypes. To evaluate the extent of mutual heritability among NHL subtypes and discover novel loci shared among subtypes, we analyzed data from eight genome-wide association studies within the InterLymph Consortium, including 10,629 cases and 9505 controls. We utilized Association analysis based on SubSETs (ASSET) to discover loci for subsets of NHL subtypes and evaluated shared heritability across the genome using Genome-wide Complex Trait Analysis (GCTA) and polygenic risk scores. We discovered 17 genome-wide significant loci (P < 5 × 10−8) for subsets of NHL subtypes, including a novel locus at 10q23.33 (HHEX) (P = 3.27 × 10−9). Most subset associations were driven primarily by only one subtype. Genome-wide genetic correlations between pairs of subtypes varied broadly from 0.20 to 0.86, suggesting substantial heterogeneity in the extent of shared heritability among subtypes. Polygenic risk score analyses of established loci for different lymphoid malignancies identified strong associations with some NHL subtypes (P < 5 × 10−8), but weak or null associations with others. Although our analyses suggest partially shared heritability and biological pathways, they reveal substantial heterogeneity among NHL subtypes with each having its own distinct germline genetic architecture.
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- Manuylov, V., et al.
(författare)
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Genetic Diversity and Possible Origins of the Hepatitis B Virus in Siberian Natives
- 2022
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Ingår i: Viruses. - : MDPI AG. - 1999-4915. ; 14:11
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Tidskriftsartikel (refereegranskat)abstract
- A total of 381 hepatitis B virus (HBV) DNA sequences collected from nine groups of Siberian native populations were phylogenetically analyzed along with 179 HBV strains sampled in different urban populations of former western USSR republics and 50 strains from Central Asian republics and Mongolia. Different HBV subgenotypes predominated in various native Siberian populations. Subgenotype D1 was dominant in Altaian Kazakhs (100%), Tuvans (100%), and Teleuts (100%) of southern Siberia as well as in Dolgans and Nganasans (69%), who inhabit the polar Taimyr Peninsula. D2 was the most prevalent subgenotype in the combined group of Nenets, Komi, and Khants of the northern Yamalo-Nenets Autonomous Region (71%) and in Yakuts (36%) from northeastern Siberia. D3 was the main subgenotype in South Altaians (76%) and Buryats (40%) of southeastern Siberia, and in Chukchi (51%) of the Russian Far East. Subgenotype C2 was found in Taimyr (19%) and Chukchi (27%), while subgenotype A2 was common in Yakuts (33%). In contrast, D2 was dominant (56%) in urban populations of the former western USSR, and D1 (62%) in Central Asian republics and Mongolia. Statistical analysis demonstrated that the studied groups are epidemiologically isolated from each other and might have contracted HBV from different sources during the settlement of Siberia.
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- Melnichuk, N, et al.
(författare)
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Complexes of Oligoribonucleotides with d-Mannitol Modulate the Innate Immune Response to Influenza A Virus H1N1 (A/FM/1/47) In Vivo
- 2018
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Ingår i: Pharmaceuticals (Basel, Switzerland). - : MDPI AG. - 1424-8247. ; 11:3
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Tidskriftsartikel (refereegranskat)abstract
- Rapid replication of the influenza A virus and lung tissue damage caused by exaggerated pro-inflammatory host immune responses lead to numerous deaths. Therefore, novel therapeutic agents that have anti-influenza activities and attenuate excessive pro-inflammatory responses that are induced by an influenza virus infection are needed. Oligoribonucleotides-d-mannitol (ORNs-d-M) complexes possess both antiviral and anti-inflammatory activities. The current research was aimed at studying the ORNs-d-M effects on expression of innate immune genes in mice lungs during an influenza virus infection. Expression of genes was determined by RT-qPCR and Western blot assays. In the present studies, we found that the ORNs-d-M reduced the influenza-induced up-expression of Toll-like receptors (TLRs) (tlr3, tlr7, tlr8), nuclear factor NF-kB (nfkbia, nfnb1), cytokines (ifnε, ifnk, ifna2, ifnb1, ifnγ, il6, il1b, il12a, tnf), chemokines (ccl3, ccl4, сcl5, cxcl9, cxcl10, cxcl11), interferon-stimulated genes (ISGs) (oas1a, oas2, oas3, mx1), and pro-oxidation (nos2, xdh) genes. The ORNs-d-M inhibited the mRNA overexpression of tlr3, tlr7, and tlr8 induced by the influenza virus, which suggests that they impair the upregulation of NF-kB, cytokines, chemokines, ISGs, and pro-oxidation genes induced by the influenza virus by inhibiting activation of the TLR-3, TLR-7, and TLR-8 signaling pathways. By impairing activation of the TLR-3, TLR-7, and TLR-8 signaling pathways, the ORNs-d-M can modulate the innate immune response to an influenza virus infection.
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