Lymphocytes In Children Research Articles

Characteristics of subpopulation composition of peripheral blood lymphocytes in children with different forms of congenital ichthyosis

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Mucosal Immunity Related to CD8+ T Lymphocytes in Children with Helicobacter pylori Gastritis.

We investigated the role of CD8+T cells as host immune factors in pediatric patients with Helicobacter pylori gastritis. Gastric mucosal tissue and blood samples were collected from 39 children, including 11 children with H. pylori infection and 28 children as controls. Anti-CD8 and anti-T-bet antibodies were used for immunohistochemistry of the gastric mucosa. For the cell surface and intracellular staining, peripheral blood mononuclear cells were stained with anti-IL7Rα, anti-CX3CR1, anti-CD8, anti-T-bet, and anti-IFN-γ antibodies. Cytokines of sera such as tumor necrosis factor alpha (TNF-α) and CX3CL1 were analyzed using enzyme- linked immunosorbent assay (ELISA). In the immunohistochemistry of gastric mucosa, the frequency of CD8+ and T-bet+ T cells cells was higher in the H. pylori-positive group than in the control group (26.9± 7.8% vs. 16.9±3.3%, p<0.001; 5.0±2.5% vs. 2.2±0.7%, p=0.001). Between the control and H. pylori-positive groups, the frequency of IL-7RαlowCX3CR1+ CD8+ and T-bet+ INF-γ+ CD8+ T cells were not significantly different between surface and intracellular staining, respectively (40.4±24.0% vs. 38.2±17.8%, p=0.914; 40.4±24.0% vs. 38.2±17.8%, p=0.914). In the ELISA, no significant differences in TNF-α and CX3CL1 concentrations were observed between the control and H. pylori-positive groups (34.3±12.1 pg/mL vs. 47.0±22.6 pg/mL, p=0.114/0.5± 0.1 pg/mL vs. 0.5±0.1 pg/mL, p=0.188). CD8+ T and Th1 cells, which secrete IFN-γ, might play important roles in the mucosal immunity of the stomach in children with H. pylori infection.

Complete blood profile of children diagnosed with asymptomatic urinary tract infection: oral nutritional supplement (ONS) intervention

Background: Young children are at high risk of urinary tract infections (UTI) that present as asymptomatic non-specific signs without clinical presentation. UTIs put children at risk of malnutrition, and thus early diagnosis, nutritional management, and medication are important. The administration of oral nutritional supplements (ONS) with an energy intake of 400 kcal/day is thought to be an effective strategy to provide balanced nutritional needs. Objectives: This study aims to investigate the clinical symptoms and growth pattern of young children with UTIs and with clinical symptoms of poor feeding and growth faltering who received medical treatment and nutritional intervention for three months. Methods: A cross-sectional analytical study was conducted from January 2019 to December 2020 at the outpatient installation unit of Husada Utama Hospital. Subjects were children aged one to five years old, with the main complaint of poor feeding and constant weight gain. UTIs were identified according to the urine culture results. If the count exceeded 100.000 cfu/ml, it was determined as a urinary tract infection. Results: A total of 37 children were enrolled in this study and received diet advice, ONS, and medication. The proportion of boys was higher than girls in this study (21 to 16, respectively). Undernutrition was experienced by 14 subjects (37.84%) who were stunted or severely stunted (13 subjects or 35.14%), underweight or severely underweight (seven subjects or 18.92%), and wasted (four or 10.81%). It was shown that ONS improves mean corpuscular volume (MCV) and mean corpuscular haemoglobin (MCH) significantly, and slightly increased haemoglobin though there was no significant difference. White blood cell (WBC) and lymphocyte levels reduced after ONS intervention. Conclusion: Nutritional intervention with ONS improves erythropoiesis (MCV and MCH) but reduces WBC and lymphocytes in children with UTIs.

УСИЛЕНИЕ ОКИСЛИТЕЛЬНОГО СТРЕССА, УРОВНЯ АПОПТОЗА И ИЗМЕНЕНИЕ В УРОВНЕ ЭКСПРЕССИИ ГЕННОВ BCL И BAX У ДЕТЕЙ С ТЯЖЕЛОЙ ФОРМОЙ РАС

Autism Spectrum Disorders (ASDs) are a heterogeneous group of psychiatric disorders most commonly seen in children. Patients with ASD are characterized by cognitive, behavioral, communicative deficits and obsessive stereotypical behavior. At that moment, the etiology and pathogenesis of ASD is one of the most important problems in child psychiatry. Patients with ASD are characterized by increased oxidative stress. The aim of this study was to characterize the role of oxidative stress in patients with ASD in enhancing the level of apoptosis. The clinical group consisted of 133 children with ASD (DSM-5), &#x0D; 4-12 years old, who were followed up by the Federal State Budget Scientific Institution National Center for Health Care. Children with ASD were divided into two subgroups according to the severity of the course of the disease, according to CARS scores. The control group included 27 healthy children. Lymphocytes were isolated from whole blood by centrifugation in a ficoll-urographin gradient. The level of gene expression in peripheral blood lymphocytes of patients with ASD and healthy controls was assessed by quantitative determination of the mRNA level by real-time PCR and by the level of protein in cells, flow cytometry. cytofluorometry. In the lymphocytes of children from the subgroup with mild and moderate forms of ASD, the level of ROS was increased, but the level of significance was not reached, while in the lymphocytes of children with severe ASD, the level of ROS was 2.2-2.5 times higher than in children of the control group. groups (p&lt;0.01). The level of expression of the anti-apoptotic gene BCL2 in lymphocytes of children with severe ASD was reduced by 2-2.5 times (p&lt;0.01), and the level of expression of the pro-apoptotic BAX gene was increased by 1.8-2.3 (p&lt;0.01) times higher compared to the control. This may indicate an increase in oxidative stress and apoptosis in patients with severe ASD.

Relationship between Iron deposition and T lymphocytes in children with β-thalassemia with haematopoietic stem cell transplantation.

β-Thalassemia cellular immunity is associated with iron overload. However, the relationship between varying degrees of iron deposition and T cell immune recovery after allogeneic haematopoietic stem cell transplantation(allo-HSCT) in children remain unclear. A retrospective analysis was performed on 84 children with β-Thalassemia undergoing sibling allo-HSCT. According to the degrees of hepatic iron deposition, patients were divided into four classes. T lymphocyte counts were measured. Hepatic iron deposition was assessed by T2* MRI. Epstein-Barr virus and cytomegalovirus infection rates and graft-vs.-host disease incidence were recorded. Immune recovery after allo-HSCT was compared between the two groups. Normal vs. mild group: CD4 cells were higher at 1, 3, and 6 months (P < 0.05), CD3 and CD8 cells were higher at 3 and 6 months, and 1 year in normal group (P < 0.05). Normal vs. moderate group: CD3 and CD4 cells were higher at 1, 3 and 6 months, and 1 year (P < 0.05), CD8 cells were higher at 1 and 3 months, and 1 year in normal group (P < 0.05). Normal vs. severe group: CD3, CD4 and CD8 cell at 1, 3 and 6 months, and 1 year in normal group (P < 0.05). Mild vs. moderate group: CD3, CD4 and CD8 cells were higher at 1 month in mild group (P < 0.05). Mild vs. severe group: CD4 cells were higher at 1, 3 and 6 month, and 1 year (P < 0.05), CD3 and CD8 cells were higher at 1 month in mild group (P < 0.05). Moderate vs. severe group: CD4 cells were higher at 3 months (P < 0.05), CD8 cells were higher at 6 months in moderate group (P < 0.05). The hepatic T2* values were positively correlated with CD3, CD4 and CD8 cells. The infection rates of Epstein-Barr virus and cytomegalovirus were significantly different among the groups (P < 0.05). Iron deposition affects immune recovery of T lymphocytes after allo-HSCT in children with β-thalassemia. The lower the levels of iron deposition, the greater the CD4 cell count.

Energy Status of Lymphocytes in Children with Bronchial Asthma of Various Severity in Comparison with Frequently Ill and Healthy Children.

We studied disturbances of cellular energy exchange as one of the leading factors in the development of chronic inflammation in asthma. Comparison of the indicators of mitochondrial respiration and glycolysis in lymphocytes of children with bronchial asthma of different severity, children from the group of frequently ill, and conditionally healthy children showed that the degree of impaired energy metabolism correlates with the severity of the disease. In mild and compensated course of bronchial asthma, as well as in the group of frequently ill children, an increase in the activity of oxidative phosphorylation was observed, which was also accompanied by support in the form of glycolysis activation. This suggests that the energy supply mechanisms are preserved. In more serious cases (moderate bronchial asthma), mitochondrial respiration was hyperactivated with suppression or even absence of glycolysis in some cells. In children with severe bronchial asthma, depression of all studied dehydrogenases was observed, which is probably an unfavorable prognostic sign. These results make it possible to determine the indications for the choice of basic therapy drugs and can serve as a prognostic marker of the severity of the course of the disease.

Evaluation of the involvement of PPARG2 gene rs1801282 polymorphism in the pathogenesis of bronchial asthma with obesity in children

Introduction. Features of the clinical course of bronchial asthma in children with obesity made it possible to identify a special phenotype, when the presence and severity of obesity determine a more severe course of asthma and a worse response to asthma therapy. Asthma, like obesity, is recognized as a classic example of multifactorial diseases, which are based on a rather complex gene network. Studying the genetic basis of both of these complex traits and linking them to the asthma phenotype should contribute to our understanding of the overall genetic basis of these pathological disorders.Aim. Evaluation of the clinical and genetic significance of the rs1801282 polymorphism of the PPARG2 gene (34C&gt;G, p.Pro12Ala) in children with asthma and obesity.Materials and methods. 161 children with asthma were examined, including 59 patients with obesity 1-3 degrees. The examination included general clinical, functional, instrumental methods. The level of asthma control was determined according to the GINA criteria (2018). The study of gene polymorphisms was carried out by the real-time polymerase chain reaction.Results. An analysis of the frequencies of the PPARG2 gene polymorphism in children with bronchial asthma did not reveal any differences from the control group healthy people. In 61% of children with asthma and obesity, there was no control over the disease, which was associated with the G allele (OR 2.4 [95% CI: 1.09‒5.30], p=0.0281). An increase in the activity of lactate dehydrogenase and a decrease in the membrane potential of mitochondria in peripheral blood lymphocytes in children with the GG genotype were revealed, which may indirectly affect the level of disease control.Conclusion. The comorbidity of asthma and obesity in children affects the control of the disease. This manifests itself through immune mechanisms that play a key role in energy homeostasis and mitochondrial dysfunction of immunocompetent blood cells. The G-allele of the PPARG2 gene can be a marker of the lack of control over the disease in obese children with asthma. The pathogenetic significance of this polymorphism requires further study.

Comparison of Leukocyte, Neutrophil, and Lymphocyte Levels in Child Patients that Experienced Breathlessness with COVID-19 and Non-COVID-19 (2020–2021) in Medan, Indonesia

BACKGROUND: COVID-19 is a disease caused by severe acute respiratory syndrome coronavirus-2. Various risk factors affect the morbidity and mortality of COVID-19, such as age, gender, ethnicity, comorbid conditions, and laboratory parameters. Clinical manifestations of COVID-19 in children are asymptomatic mild degrees or with acute upper respiratory tract symptoms and moderate degrees with clinical pneumonia. In the course of the COVID-19 pandemic, several biomarkers are needed that can be useful in risk stratification to predict the severity and fatality of COVID-19. Several biomarkers are used as markers of disease progression to a critical degree, such as leukocytes, lymphocytes, platelets, interleukin-6, and serum ferritin. Increased leukocytes and neutrophils and decreased lymphocytes are associated with severity and mortality in COVID-19. Laboratory findings in children with COVID-19 include decreased lymphocytes, leukopenia, and increased procalcitonin. In severe COVID-19, children often have abnormal laboratory parameters that suggest a systemic inflammatory response. AIM: This study aims to compare leukocytes, neutrophils, and lymphocytes levels in children with the complaints of shortness of breath with COVID-19 and non-COVID-19 pediatric patients. MATERIALS AND METHODS: This study is an analytic study with a cross-sectional approach to pediatric patients treated in Haji Adam Malik General Hospital Medan with the complaints of shortness of breath. Patient data were assessed based on the characteristic values of hemoglobin, leukocytes, neutrophils, lymphocytes, and COVID-19 polymerase chain reaction results and then analyzed using SPSS for Windows software. The study samples were 276 patients, with 43 confirmed positive COVID-19 patients and 233 negative patients. The source of this research data is data from the patient’s medical record for 1 year (2020–2021). RESULTS: The statistical analysis results found differences in the levels of leukocytes, neutrophils, and lymphocytes in children diagnosed with COVID-19 and non-COVID-19 (p &lt; 0.05). However, there was no difference in hemoglobin levels in children who were congested with COVID-19 and non-COVID-19 (p &gt; 0.05). CONCLUSION: These results are consistent with several cases and previous studies where the levels of leukocytes, neutrophils, and lymphocytes can be used as a detection tool and a diagnostic and prognostic tool in COVID-19 patients.

Analysis of changes in the expression levels of peripheral blood immunoregulatory T Lymphocytes in children with bronchial asthma accompanied by recurrent infection.

Objectives:To investigate the changes in the expression levels of peripheral blood immunoregulatory T lymphocytes in children with bronchial asthma accompanied by recurrent infection.Methods:Eighty children with bronchial asthma admitted to the Third Outpatient Department of General Hospital of Northern Theater Command from January 2017 to January 2019 were retrospectively selected and divided into two groups according to whether they had recurrent infection: the asthma group (n=49) and the recurrent infection group (n=31). Another 40 children in the same age group who had a health checkup or a surgical hospital preoperative examination were selected as the control group. Peripheral venous blood of each group was taken to measure the expression levels of T lymphocyte subsets (CD3+, CD4+, CD8+, CD4+/CD8+), and regulatory T cells (Treg) and helper T lymphocytes (Th1, Th2, Th17) in CD4+ subsets were detected at the same time. Moreover, Th1/Th2 values were calculated, and the levels of interleukin-4 (IL-4), interleukin-17 (IL-17), and interleukin-21 (IL-21) were measured.Results:The expression levels of CD3+ lymphocyte subsets were similar among the recurrent infection group, the asthma group, and the control group (P>0.05), and there were statistically significant differences in CD4+, CD8+ and CD4+/CD8+ lymphocyte subsets among the three groups (P<0.05). Statistically significant differences were observed in Treg, Th1, Th2, Th17 and Th1/Th2 values among the recurrent infection group, asthma group and control group (CD3+, CD4+, CD8+, CD4+/CD8+<0.05), and the expression levels of IL-4, IL-17 and IL-21 in the three groups also showed statistically significant differences (P<0.05).Conclusion:Bronchial asthma with recurrent infection may have a close bearing on the expression level of peripheral blood immunoregulatory T lymphocytes, and indirect examination of peripheral blood T lymphocyte level in children can be used clinically to determine the incidence of the disease, which is of high clinical application value.

Th17 Lymphocytes in Children with Asthma: Do They Influence Control?

Background: Allergic asthma was considered as an inflammation mediated by specific CD4+ helper lymphocytes (Th2); however, this paradigm changed in 2005, when a third group of helper cells called Th17 cells were identified. Th17 lymphocytes are the main source of interleukin (IL)-17A-F, IL-21, and IL-22; however, their physiological role in children is unclear. This study aimed to determine the percentage of Th17 cells and IL-17A in pediatric patients diagnosed with asthma and to associate it with disease control using a validated questionnaire. Methods: This cross-sectional, prospective, comparative study included 92 asthma-diagnosed children 4-18 years of age. The Asthma Control Test was used as an assessment measure to classify patients as controlled (n = 30), partially controlled (n = 31), and uncontrolled (n = 31). Th17 cells and IL-17A were analyzed by flow cytometry. Patients receiving inhaled steroid therapy as monotherapy or associated with a long-acting bronchodilator were included. Results: The mean percentage of Th17 cells in the participants was 4.55 ± 7.34 (Controlled), 5.50 ± 8.09 (Partially Controlled), and 6.14 ± 7.11 (Uncontrolled). There was no significant difference between the 3 groups (P = 0.71). The mean percentage of IL-17A in all the participants was 9.84 ± 9.4 (Controlled), 10.10 ± 10.5 (Partially Controlled), and 11.42 ± 8.96 (Uncontrolled); no significant difference between the 3 groups (P = 0.79) was observed. Th17 lymphocyte levels were similar among the 3 groups and the same trend was observed with IL-17A. A significant correlation between Th17 or IL-17A and the degree of asthma control (Th17, P = 0.24; IL-17A, P = 0.23) was not found. Conclusions: The percentages of both Th17 lymphocytes and IL-17A found in children with asthma were not significantly different in the 3 groups, which suggests that they do not play an important role in asthma control. Our findings may contribute to the knowledge related to non-Th2 inflammation in children. Clinical-Trials.gov ID: 2015-2102-85.

The role and correlation of IL-35 and type II intrinsic lymphocytes in children with allergic rhinitis.

To investigate the role and correlation of IL-35 and ILC2 in children with allergic rhinitis. 50 cases of children with allergic rhinitis admitted to our hospital from February 2018 to March 2020 were selected as the research subjects and set as the study group. During the same period, 50 cases of normal children admitted to our hospital for physical examination were selected as the control group. The differences in the expression of IL-35 and ILC2 between the two groups and the correlation with the severity of allergic rhinitis were compared. In BMI, the study group was significantly lower than the control group, and the difference was statistically significant (P<0.05). IL-35 in the study group was significantly lower than that in the control group, while ILC2, IL4+ILC2, IL-5+ILC2, IL-13+ILC2, IgE and ECP in the study group were significantly higher than those in the control group, the difference was statistically significant (P<0.05). Pearson correlation analysis showed a moderate negative correlation between TNSS score and IL-35 (r =-0.642, P<0.05), was positively correlated with ILC2, IL4+ILC2, IL-5+ILC2, IL-13+ILC2, ECP (r =0.745, 0.713, 0.725, 0.769, 0.746, P<0.05), and was strongly correlated with IgE (r =0.952, P<0.05). Also, It was positively correlated with TGF-?1 (r =0.513, P<0.05). IL-35 was strongly negatively correlated with ILC2, IL4+ILC2, IL-5+ILC2, IL-13+ILC2 (r =-0.845, -0.812, -0.805, 0.823, -0.854, P<0.05). Was negatively correlated with ECP and TGF-?1 (r =-0.795, -0.543, P<0.05). ILC2 was strongly correlated with IgE (r =0.812, P<0.05), and moderately positively correlated with ECP and TGF-?1 (r =0.642, 0.541, P<0.05). ROC curve was used to evaluate the diagnostic value. The results showed that among the five indicators, IgE had the highest sensitivity of 92.23%, while IL-35 had the highest specificity of 92.56%. However, the combined area, sensitivity and specificity of the five indicators were the highest, 0.962, 95.18% and 94.25%, respectively (P<0.05). Both IL-35 and type II intrinsic lymphocytes are highly correlated with the severity of allergic rhinitis in children, the former is negatively correlated with the latter is positively correlated. The detection of these indexes in clinical practice can be helpful for clinical diagnosis.

Features of lymphocyte differentiation in ANCA-associated and virus-associated glomerulonephritis in children

Glomerulonephritis is a heterogeneous group of immuno-inflammatory diseases. The purpose of the study: to analyze the subpopulation composition of lymphocytes in children with various types of glomerulonephritis. 50 children aged 1 to 16 years were examined: 1 group — 17 children aged 1 to 16 years with ANCA-associated glomerulonephritis; 2 group — 33 patients aged 2 to 16 years with virus-associated glomerulonephritis. Diagnostics of the subpopulation composition of lymphocytes was performed by flow cytometry using non-flushing technology using a three-color combination of monoclonal antibodies. It was found that the development of ANCA-associated glomerulonephritis is accompanied by signs of immunodeficiency against the background of a relative increase in the content of T-lymphocyte subpopulations. Differentiation of lymphocytes in children with virus-associated glomerulonephritis is ambiguous: the process goes either along the path of activation of antiviral protection, or along the path of development of insufficient antiviral activity of immunocytes. In children with virus-associated glomerulonephritis, a decrease in the level of B-lymphocytes was found, correlating with hypoimmunoglobulinemia A, which is an additional factor in reducing resistance on the mucous membranes. The study of lymphocyte differentiation in the development of glomerulonephritis is important for identifying the main immunological mechanisms involved in the pathogenesis of these diseases.

Нестабильность генома как индикатор состояния окружающей среды в Мурманской области

The data of various researchers indicate that the combined effects of natural and anthropogenic factors directly affect the nature of the territorial morbidity of the inhabitants of the Far North. In biomonitoring of the environment, a micronucleus test on human cells is widely used to assess the degree of genotoxicity of the comparison areas. The aim of the research is to study the local situation with the accumulation of lesions in the lymphocytes of children living in the Murmansk region using a micronucleus test. As a result of assessing the cytogenetic status of the child population living in the comparison territories (Krasnoshchelye, Lovozero, Umba, Apatity), specific territorial features of the cytogenetic status of children were revealed, which are probably associated with the prevailing morbidity in the territories comparisons. This is probably due to territorial genotoxic and toxic agents. Significant differences in the frequency of occurrence of binucleated lymphocytes with micronuclei in schoolchildren were noted when all cells (mononuclear, binuclear, trinuclear, quadrenuclear cells, as well as cells containing more than 4 nuclei) were taken into account between Krasnoshchelye, Lovozero (U = 45.0, p = 0.0009), Umba (U = 91.0, p = 0.0125) and Apatity (U = 113.0, p = 0.0125). Also, significant differences were noted between the frequency of occurrence of cells with micronuclei among cells that did not respond to the mitogenic signal (mononuclear) and contain more than 2 nuclei in lymphocytes between adolescents from Krasnoshchelye and Apatity (U = 109.0, p = 0.0093) and Umba (U = 73.5, p = 0.0025). When comparing the frequency of occurrence of all types of cells containing micronuclei in the lymphocytes of adolescents, significant differences were revealed between the frequency of occurrence of such cells in adolescents from Apatity and Umba (U = 97.0, p = 0.0036).

Evaluation of immunological role of Interferon gamma, Interleukin-10 and CD4+ T lymphocytes in pediatric patients with sickle cell disease

Sickle cell disease (SCD) is a chronic inflammatory disease associated with increased levels of multiple cytokines as interferon gamma (IFN-γ) during vaso-occlusive (VOC) crisis and steady state. Therefore, we aimed to explore theimmunological role of serum IFN-γ, interleukin-10 (IL-10) and CD4+ T lymphocytes in children with SCD at steady state and VOC. This study was conducted on 30 children with SCD (15 at steady state and 15 in VOC) and 30 healthy children as controls. Detailed history, complete physical, clinical examination and laboratory investigations as: complete blood count, serum ferritin, IFN-γ, IL-10 and CD4+ T lymphocytes for all patients were recorded. Results: Significant increase in serum IFN-γ in patients with SCD during VOC compared with patients at steady state and controls (P<0.001). Significant increase in serum IL-10 in patients with SCD at steady state compared with those during VOC and controls (P=0.008 and P=0.04 respectively). CD4 +T lymphocyte decreased in patients with SCD during VOC compared with those at steady state and controls (P<0.001). There was a significant positive correlation between serum IFN-ɣ and number of crisis per year (r=0.648, P=0.0001). Serum IFN-γ was increased in patients with history of frequent crisis per year (P=0.001) and decreased in patients under hydroxyurea therapy (P<0.001). IFN-γ was increased in SCD patients. Increased IFN-γ production in SCD suggesting that functionally activated natural killer cells reflecting a host immunological mechanism leading to antigen antibody activation in SCD. Serum IL-10 increased in SCD patients at steady state. CD4 +T lymphocyte decreased in patients during VOC.

Immunopathogenetic significance of activation and apoptosis of immunocompetent cells in children with HIV infection

The purposeis to clarify the immunopathogenetic significance of immunocompetent cells activation and apoptosis in children with HIV-infection.Materials and methods. A clinical and immunological examination of 92 children aged 1 to 5 years old with HIVinfection in latent stage 3 (25), in the stage of secondary diseases 4A (21), 4B (22) and 4V (24) was conducted.Results.During the clinical examination, the consistent appearance of HIV-associated symptoms, opportunistic infections, and tumors was noted. Changes in the immune status included abnormalities in the T-cell component – a decrease in the number of CD4-, CD3-, increase of CD8-lymphocytes, inversion of the CD4/CD8 ratio, in the B-cell component – hyperimmunoglobulinemia, increase in the content of circulating immune complexes, in the part of innate immunity factors – a decrease in the intensity of the oxygen-dependent neutrophil metabolism and its reserve capabilities. Identified impaired positive activation of lymphocytes – a decrease in the number of CD25- and an increase in HLADR-cells. An increase in the expression of CD95-receptors on the lymphocyte membrane, an increase in the number of lymphocytes in the early (AnV) and late stages of apoptosis (AnV/Pr) was found. With the progression of HIV infection, there was a deepening of these shifts in immunological parameters, especially during the transition to the stage of secondary diseases 4V (AIDS).Conclusion.An immunological examination and correlation analysis showed that an important immunopathogenetic mechanism for reducing the number of CD4 lymphocytes in children with HIV infection is the activation of apoptosis involving the receptor and mitochondrial mechanisms. One of the reasons for the formation of depressed cellular immunity was the hyperactivation of immunocompetent cells. The findings provide a rationale for the timely prescription of antiretroviral therapy for children with HIV-infection, which will prevent hyperactivation and apoptosis of immune system cells.

Chemokine receptors on peripheral blood T lymphocytes in children on peritoneal dialysis.

Immune cell dysfunction is listed among complications resulting from chronic kidney disease (CKD). It could be associated with T-cells, which play a role in the lymphocytic migration and infiltration. However, the data on chemokine receptors expression on T-cells in patients with CKD particularly treated with peritoneal dialysis (PD) are still limited. The study aimed at multiparameter flow-cytometric analysis of the absolute numbers and percentage of T-cell subsets with surface chemokine receptors (CCR4, CCR5, CCR7, CXCR3, and CXCR4) or receptors' combinations in 47 children treated with PD. We found lower absolute numbers of total T lymphocytes, lymphocytes with surface CCR5, CXCR4+CCR5, CXCR3+CCR5 antigens and T-cells with CCR4, CCR4+CD4, CXCR3, CXCR3+CD4, and CD8 receptors. Lymphocytes T with CD4, CCR7, CD28+CCR7, CXCR3+CD8 antigens showed higher percentage in children on PD as compared to healthy children and opposite percentage values of CCR4+, CCR4+CD4+, CXCR3+ T lymphocytes were diminished. Mean fluorescent intensity for CCR7+, CCR7+CD45RO+, CCR7+CD28+, CXCR4+CD4+, CCR5+CD4+, CCR4+, CCR4+CD4+ T-cells was lower in the PD group than in healthy children. The analysis of correlation between T lymphocyte subpopulations with chemokine receptors and other parameters revealed positive correlation of CCR7+ and CCR7+CD28+ T-cells and weekly creatinine clearance, negative correlation between the percentage of CD45RO+CCR7 antigen positive T-cells and KT/Vurea. In conclusion, we could not confirm the phenomenon of earlier senescence of T-cells in children with CKD on PD treatment. This still requires further investigation. The higher percentage of T-cells with CCR7 surface receptor could be responsible for the increase of proliferation activity in this group of children.

Major and minor lymphocytes subpopulations in peripheral blood and cerebrospinal fluid of children with meningitis

Introduction. The analysis of current publications indicates at our insufficient understanding of subpopulation composition of lymphocytes in peripheral blood and cerebrospinal fluid (CSF) during pediatric neuroinfectious diseases. It has been found that the main lymphocyte populations are divided into many small (minor) subpopulations.The purpose of this research was to assess percentage of major and minor blood and CSF lymphocyte subsets in children with aseptic viral meningitis (AM) or bacterial purulent meningitis (BM).Materials and methods. Phenotyping of blood and CSF lymphocytes of children aged from 4 months to 17 years diagnosed with AM (n = 86) and BM (n = 39) was carried out by using flow cytometry. As a comparison group, we analyzed peripheral blood and CSF samples collected from children with acute respiratory viral infections (ARVIs) associated with syndrome of meningism (n = 27). There was evaluated percentage of the major cell subpopulations (CD3+ T-lymphocytes, T-helpers — CD3+CD4+ Th, cytotoxic T-lymphocytes — CD3+CD8+ CTL, natural killer cells — CD3-CD16+CD56+ NK, B-cells — CD3-CD19+), as well as minor lymphocyte subsets (double positive (DP) (CD3+CD4+CD8+), double negative (DN) (CD3+CD4-CD8-) T-cells, NKT (CD3+CD16+CD56+), CD3-CD8+ NK, CD3+CD8dim and CD3+CD8 8bright).Results. It was found that the acute period of BM and AM vs. the comparison group (ARVI) was characterized by significant differences in the blood and CSF composition of major and minor lymphocyte subsets. In particular, blood T-cells, Th, CTL, NK, NKT, DN, CD3-CD8+ NK, CD3+CD8bright and CD3+CD8dim dominated in parallel with significantly lowered B-cell frequency in AM vs. BM. In the CSF of children with AM, T-cells and Th prevailed, whereas count of B-cells and CD3-CD8+ NK was lower compared to those in BM. In addition, further differences were revealed in CSF and blood cell subset composition depending on nosological entity, while maintaining differences in some major and minor lymphocyte subpopulations lacked in the comparison group. Calculating the CSF/blood ratio for the major and minor lymphocyte subsets uncovered the prevalence for the majority of cell subpopulations (the coefficients ranged from 1.2 to 16.4) in the CSF of the comparison group (ARVI), except B-cells, NK and CD3-CD8+ NK (coefficients ranged from 0.07 to 0.31). AM and BM were featured with various changes in the CSF/blood ratio found for most of the studied subpopulations in the acute period as well as the recovery phase highlighted with characteristic traits for each nosological form.Conclusion. The data obtained indicate about finding specific features in the activation of systemic and intrathecal immune response during viral and bacterial meningitis in children, which may be used as an additional differential diagnostic criterion.

The efficacy of OM85-BV in the treatment of recurrent upper respiratory tract infection with adenoid hypertrophy and the preliminary exploration of potential therapeutic mechanism

Objective:To observe the efficacy of OM85-BV in the treatment of recurrent upper respiratory tract infection with adenoid hypertrophy and to explore its possible mechanism. Method:Four hundred and forty-eight children with recurrent upper respiratory tract infection and adenoid hypertrophy were collected. Three hundred and twenty-six patients in the control group were treated with conventional drugs, and one hundred and twenty-two patients in the observation group were treated with OM85-BV+conventional drugs, and the treatment lasted 12 weeks. The sleep obstructive symptoms of adenoid hypertrophy were scored according to OSA-18 before and after the treatment respectively（0, 6, 12 weeks）. The symptoms scores and effective rate of treatment between the study and the control group were compared. The patients in the control group and the observation group who were unresponsive to drug treatment received surgery after 12 weeks of drug treatment. The levels of serum IL-2, IL-4, IL-6, IL-10, TNF, IFN-γ and IgE, the ratio of serum CD3, CD4, CD8 in lymphocytes and the ratio of CD4/CD8 were compared between the study and the control group before operation. The levels of HBD-2, IFN-γ, IL-4, IL-6 cytokines in the adenoid were compared between the control group and the observation group. The expression and distribution of adenoid HBD-2, IFN-γ, IL-4, IL-6 were compared between the control group and the observation group. Result:After 12 weeks of treatment, the total effective rate of the observation group was significantly higher than that of the control group, and the improvement of sleep respiratory obstruction symptoms of children with recurrent upper respiratory tract infection and adenoid hypertrophy was also much better than that of the control group. The serum IFN-γ of the observation group was significantly higher than that of the control group, and there was no significant difference in serum IL-2, IL-4, IL-6, IL-10, TNF, IgE between the observation group and the control group. There was no significant difference in serum CD3, CD4, CD8 and CD4/CD8 between the observation group and the control group. In the observation group, the adenoid HBD-2 was significantly higher but IL-4, IFN-γ were significantly lower than that in the control group, and IL-6 had no significant difference compared with the control group. Conclusion:OM85-BV can significantly improve the sleep apnea symptoms but can not rise the level of immune lymphocytes in children with adenoid hypertrophy and recurrent upper respiratory tract infection.OM85-BV can improve the Th1 immune response, enhancing the ability of human body to fight against pathogens and induce the release of HBD-2, increasing the resistance to microorganisms, reducing the bacteria aggregation, weakening the local inflammatory response in adenoids.

Long-term impacts of tonsillectomy on children's immune functions.

Background:There exist a wide level of discrepancy regarding the role of tonsils and its indication among pediatricians and ENT specialists. This fact sometimes causes confusion and delay in making the right decisions by parents and specialists for appropriate treatment of patients.Objectives:Thus, the aim of this study was to investigate the effects of long-term tonsillectomy on the immune system of patients.Methods:In this case-control study we measured the status of immune system in 34 children (aged 9-15 years) following 4 to 6 years of tonsillectomy. We have also enrolled 30 healthy children with similar age group. Venous blood samples were taken and the serum levels of IgG, IgA, and IgM were detected along with expression of CD4, CD8, CD10 and CD56. Data were analyzed by SPSS version 18 software and a P < 0.05 was considered as significant.Results:We found that the mean serum levels IgM, IgA, and IgG in the case group was significantly (P < 0.0001) lower than the control group. Whereby, the CD4, CD8 and CD56 expressions was examined, there was no significant difference in both groups while only CD10 expression was lower in tonssiloctomized patients (P = 0.108).Conclusion:Overall, according to these findings, CD10 as a marker of B lymphocytes in children undergoing tonsillectomy was significantly less than those healthy children. This may indicate a decrease in B cells and further reduced antibody production in these patients.

Effects of Epstein–Barr virus infection on liver function in children

ObjectiveIn order to analyze the effect of Epstein–Barr (EB) virus infection on the liver function of children, the age and season of children susceptible to EB virus were analyzed in this study. MethodsIn this study, 118 children with EB infection from Cangzhou Central Hospital were selected as the subjects, and 10 children with normal liver function were selected as the control group. Compared with normal children, the changes of blood cells, immune cells and indicators related to liver function in patients with EB virus infection were compared, and the expression of EB virus -DNA in patients’ peripheral blood was analyzed. Immunohistochemistry was used to analyze the location and changes of CD4+T lymphocytes, CD8+T lymphocytes, and granzyme B cells in the liver of the patients. And changes in liver tissue were studied by in situ hybridization. ResultsIt was found that children in early childhood (1–3 years old) were the most susceptible group, and summer and autumn were the most susceptible seasons. Compared with normal children, the number of red blood cells and white blood cells in patients infected with EB virus increased, while the number of platelets decreased, but the difference was not significant. The liver function indexes of Alanine transaminase (ALT), aspartate aminotransferase (AST), gamma-glutamyl transferase (GGT), alkaline phosphatase (ALP), total bilirubin (TBIL), and lactate dehydrogenase (LDH) increased after infection. The content of CD4+T lymphocytes decreased, while that of CD8+T lymphocytes increased. The level of immune factor IgG increased significantly (P<0.01), granzyme B cells were positive compared to that of normal humans, and positive lymphocytes containing EBER appeared. ConclusionTherefore, EB virus may affect liver function by acting CD8+T lymphocytes in children.