Antibodies raised against a Sunn bug (Eurygaster integriceps Put.) recombinant protease, rGHP3p2, can inhibit gluten‐hydrolyzing activity

Sunn pest or Sunn bug, Eurygaster integriceps Put., salivary gland proteases are responsible for the deterioration of wheat flour quality during dough mixing, resulting from gluten hydrolysis. These proteases are highly heterogeneous and show low sensitivity to most types of proteinaceous inhibitors, meaning that such inhibitors cannot be used to prevent gluten damage. The present study describes the generation of a specific peptide antibody, raised against the active center of the recombinant gluten-hydrolyzing protease (GHP3). The recombinant protein, encoding two repeats of the GHP3 sequence element involved in forming the S4 pocket and binding of substrate at position P4, was designed and expressed in Escherichia coli. The antibodies raised to this recombinant protein showed inhibitory activity against the GHP3 protease. The results indicate that it is possible to design specific antibodies to inhibit wheat-bug gluten-hydrolyzing proteases

Magnetism of coupled spin tetrahedra in ilinskite-type KCu5_{5}O2_2(SeO3_3)2_2Cl3_3

Synthesis, thermodynamic properties, and microscopic magnetic model of ilinskite-type KCu$_{5}$O$_2$(SeO$_3$)$_2$Cl$_3$ built by corner-sharing Cu$_4$ tetrahedra are reported, and relevant magnetostructural correlations are discussed. Quasi-one-dimensional magnetic behavior with the short-range order around 50\,K and the absence of long-range order down to at least 2\,K is observed experimentally and explained in terms of weakly coupled spin ladders (tubes) with a complex topology formed upon fragmentation of the tetrahedral network. This fragmentation is rooted in the non-trivial effect of the SeO$_3$ groups that render the Cu--O--Cu superexchange strongly ferromagnetic.Comment: 9 pages, 7 figure

Characterisation of proteolytic enzymes of Eurygaster integriceps Put. (Sunn bug), a major pest of cereals

Eurygaster integriceps (Sunn pest or Sunn bug) is one of the most significant pests of wheat and is responsible for substantial losses in yield and quality of wheat grain in Europe and Asia. Sunn pest salivary gland-derived proteases and other hydrolases damage grain proteins and starch. Characterisation of protease activities from both Sunn pest salivary glands and Sunn pest-damaged wheat grains revealed a broad range of activities in terms of substrate specificity and diversity of isoelectric point. Neutral and alkaline proteases present in Sunn pest-damaged grains were shown to be capable of hydrolyzing gluten proteins, whilst some proteases were also shown to be active against gelatin. The neutral serine proteases present play the dominant role in degradation of gluten quality. The sensitivity of some proteases to proteinaceous and non-proteinaceous serine proteinase inhibitors was shown, including that of a recombinantly expressed protease. It was found that proteases isolated from Sunn pest salivary glands could be activated by trypsin indicating that they are present as zymogens in vivo. Analysis of individual Sunn pest-damaged grains showed great diversity in the proteases present. This work highlights the challenges of developing proteinase inhibitors to manage Sunn pest damage

POLYMORPHISM OF GENES RESPONSIBLE FOR THROMBOPHILIA AND THEIR INFLUENCE ON THE DEVELOPMENT OF THROMBOSIS IN CHILDREN

The article is devoted to the prevalence of polymorphism of genes responsible for thrombophilia among children. The study included 52 children with thrombosis and 59 children without thrombosis. Detects mutations factor V Leiden, G20210A prothrombin gene, the C677T mutation in the gene for 5,10-methylenetetrahydrofolate reductase and 4G/5G polymorphism of gene plasminogen activator inhibitor 1. Mutations thrombophilia markers are detected in 38 of 52 (73 %) children with thrombosis, and 36 of 59 (61 %) children without thrombosis (p=0,1). A combination of several mutations in genes had 38 of 69 (55 %) children having different polymorphisms. The highest percentage (86 %) of different combinations of mutations have children with venous thrombosis, wherein the presence of mutations in Factor V (Leiden) mutation and prothrombin gene was isolated, and in all cases with each other or combined with mutation of the MTHFR gene. The most significant in the development of thrombosis are the G20210A mutation in the prothrombin gene mutation and Leiden. An example of clinical thrombosis, the girl with the data mutations

ESTIMATION OF PREVALENCE OF ADVERSE GENOTYPES AND POLYMORPHIC ALLELES OF GENES-CANDIDATES OF ARTERIAL HYPERTENSION IN CHILDREN WITH ENDEMIC GOITER IN ZABAYKALSKY KRAI

This study is devoted to study the prevalence of genotypes and polymorphic alleles of genes-candidates of arterial hypertension in children with endemic goiter (EZ) in the Zabaykalsky Krai. To identify the frequency of occurrence of adverse genotypes and alleles polymorphisms Gly16Arg ADRB2, Gln27Glu ADRB2 and Thr174Met gene AGT, as factors of risk of development of arterial hypertension, were examined 194 children aged 7-11 years with a diagnosis of endemic goiter. The frequency of mutant allele 16Gly genotype Gly16Arg associated with increased agonist-induced suppression of beta-2 adrenergic receptors has not been above (63,2 %) than in the group of healthy children (60,3 %) (p(j2) > 0.05). The frequency of allele Arg16 defining a greater degree of vasodilating effect, was 39.7 % and 36.8 %, respectively (p(x2) > 0.05). Thefrequency characteristics of alleles genotype Gln27Glu in group I were the following: wild type 27Glu 41 %, the mutant allele Gln27 59 %, in the control group 42,2 % (p(χ2) > 0.05) and 57.8 % (pfy2) > 0.05) respectively. The frequency of wild-type Thr174 genotype Thr174Met accounted for 85.3 % in group I and 86.2 % in the control group (p(x2) > 0.05) and the frequency of occurrence ofthe mutated allele 174Met 14.7 % in the group of children with diffuse nontoxic goiter and 13.8 % in healthy children, respectively (pCx2) > 0.05). Significant differences in the distribution of genotypes and alleles between groups are not identified, and the frequency characteristics were comparable with the prevalence in the population and the results of other authors. The distribution of genotypes and frequency of alleles of a gene Gly16Arg and Gln27Glu ADRB2, Thr174Metgene AGT in both groups corresponded to the expected according to the hardy-Weinberg equilibrium in the population sample. The results obtained in the course of molecular-genetic study led to the conclusion that polymorphisms Gly16Arg ADRB2, Gln27Glu ADRB2 and Thr174Met gene AGT are not factors of risk of development of arterial hypertension in children with endemic goiter

The processes of lipid peroxidation in children with the attention deficit hyperactivity disorder and different interhemispheric relations of brain

In recent years, the number of children with attention deficit hyperactivity disorder (ADHD) increased, which may be due to the increasing information stress and wide introduction of new information technologies. Manifestations of ADHD may be the cause of impaired social and school adaptation, learning difficulties, reduced academic achievements. The syndrome is believed to cause suffering to the frontal lobe of the brain, subcortical structures of the brain, reticular formation and stem structures. The features of the formation of the metabolic processes underlying the adaptive-compensatory mechanisms in children with different interhemispheric relations of brain and ADHD are studied insufficiently. Lipids form the basis of the central nervous system and the lipid matrix of cell membranes. The processes of lipid peroxidation have damaging effect on a cell by altering the structure of cell membranes. The aim of the study was to investigate peculiarities of the carbohydrate and lipid metabolism, peroxidation that determine the normal functioning of metabolic and cellular homeostasis in children with attention deficit hyperactivity disorder, and different hemispheric relations. 54 children of 7-11 years, living in Irkutsk, were examined. Patients were characterized by the normal level of general mental development, the absence of anemia, endocrine diseases, by the absence in the anamnesis of craniocerebral traumas, neuroinfections, epilepsy, mental illness. Changes of metabolic reactions had distinct individual differences of patients, due to specific functional activity of the cerebral hemispheres

Study of apolipoprotein C3 S1/S2 (C3238G, rs5128) polymorphism in Caucasian population of Eastern Siberia

The prevalence of genotypes and alleles of polymorphic marker S1 /S2 Apolipoprotein C3 in healthy adolescent Caucasians (Russians) living in Eastern Siberia was studied. Material for research was the DNA extracted from the venous blood; genotype was determined by PCR-RFLP for each sample. In the studied sample in 88.9 % of cases genotype S1/ S1 was detected, genotype S1/S2 was found in 8.6 %, S2/S2 - in 2.5 %. The share of S2 allele was 6.8 %, which is not significantly different from the previously studied Caucasoid populations

Changes in the mountain river discharge in the northern Tien Shan since the mid-20th Century: Results from the analysis of a homogeneous daily streamflow data set from seven catchments

This study is an assessment of the changes in seasonal and monthly flow in seven catchments draining the northern Tien Shan Mountains in Central Asia over a period from the 1950s to the present day. The purpose is to provide a first assessment of the flow response to climate change in regionally important catchments given their contribution to the water resource. All the catchments have a natural flow regime, and are therefore sensitive to climate change, but differ in area, elevation and glacial extent. Trends in flow were characterised using the Mann-Kendall test for standard meteorological seasons and individual months for mean flow, five flow quantiles and peak-over-threshold series for the period 1974–2013 at all sites and from the 1950s where data were available. The results were related to trends in seasonal temperature and precipitation from the regional high elevation meteorological stations and glacier mass balance, equilibrium line altitude (ELA) and accumulation area ratio (AAR) records from the Tuyuksu glacier. The results show no reduction in streamflow in any catchment or season in the northern Tien Shan since the 1950s. Positive trends in all flow indicators, including peak over- threshold frequency, were observed in catchments with higher glacierization of over 10% and extensive presence of rock glaciers and permafrost indicating increased melt over the period which is characterised by a long-term increase in temperature. These trends were most evident in autumn and winter. In catchments with low glacierization, variability in summer flow was controlled primarily by precipitation of the preceding cold season. Correlation with glacier mass balance was weak but changes in ELA and AAR indicate that production of liquid runoff at higher elevations contributes to increased streamflow partly compensating for the declining glacier area. The observed changes in streamflow do not suggest any immediate problems with water availability in the northern Tien Shan. On the contrary, increased autumn and winter flows point at a more prolonged recharge of reservoirs and aquifers though eventually this water source will be exhausted