Neuroendocrine regulation and ovarian reserve in HIV-infected women with reproductive disorders

Background: Among the subjects of the Russian Federation, Irkutsk region is an area with an unfavorable epidemiological situation for HIV-infection. Women living with HIV in Russia and visiting AIDS-centers represent a socially and economically active part of the population are at a young reproductive age and plan to have children. Aims: to study the state of the neuroendocrine system and the ovarian reserve in HIV-infected women with reproductive disorders. Materials and methods. We examined in 17 HIV-infected women with reproductive disorders and 33 women with HIV-infection and reproductive health at the age of 18-45 years (mean age 31,1 ± 4,4 years). The determination of hormone levels was carried out by a competitive solid-phase enzyme-linked immunosorbent assay. Results. The obtained results testify to neuroendocrine disorders in the form of a decrease in the level of total testosterone, 17-OH progesterone, dehydroepiandrosterone sulfate, as a manifestation of androgen deficiency of the body, as a result of ovarian dysfunction. Decrease in the level of Anti-Mullerian Hormone and increase the content of follicle-stimulating hormone, as a manifestation of the beginning of early menopause or a factor leading to infertility. Conclusions. The results of this study show that a woman's body on the background of HIV-infection reveals disorders of the neuroendocrine system dysfunction and decreased ovarian ovarian reserve, and as a result, reproductive disorders

The study of the influence of deviations of the arc energy parameters on the defects formation during automatic welding of pipelines

Modern quality management systems for welding products are based on procedures to minimize the likelihood of typical defects. The reasons for deviations of the energy parameters of the welding process include disturbances along the length of the arc or its breaks associated with a spasmodic change in the electrode wire feed speed, violation of the power circuit with the welded product, mains voltage, and shielding gas consumption. To establish a connection between deviations of the welding parameters with the quality indicators of the welded joints, a model for the formation of a weld seam under the conditions of technological disturbances has been developed. It is shown that the formation of the crater depends not only on the duration of the arc break, but also on the welding parameters. It has been established that in the presence of lateral oscillation of the electrode, an arc break significantly increases the undercut, the maximum depth of which movesto the center of the groove to the cutting center as the break duration increases. Whereas an increase in the amplitude of lateral oscillation of the electrode causes a significant increase in the depth of the crater. © Published under licence by IOP Publishing Ltd

Assessment of functional state of the pituitary-gonadal system in fertile women with acute hepatitis A

Liver is a necessary participant of the metabolism of steroid hormones, so dysfunction of pituitary-gonadal system is possible at viral hepatitis A. We assessed functional state of pituitary-gonadal part of neuroendocrinal regulation system in fertile women with acute hepatitis A and detected changes that can be regarded as compensatory-adaptive shielding of an organism

Obstructive sleep apnea and amyloid-β42 in adolescents: The results of a pilot study

Background. Obstructive sleep apnea (OSA) is a chronic condition characterized by repetitive collapse of the upper airway during sleep leading to intermittent hypoxia, excessive arousals and disrupt of sleep homeostasis. OSA is associated with obesity as well as pathological dynamics of cerebral beta-amyloid and dementia.The aim. Comparative assessment of the plasma beta-amyloid 42 levels in adolescents, depending on the presence or absence of OSA and obesity.Materials and methods. Seventy-four obese and non-obese male adolescents were included in the study. All participants underwent polysomnography to verify OSA and measure sleep parameters, and venipuncture for the assessment of betaamyloid 42 by enzyme-linked immunosorbent assay (ELISA).Results. After polysomnography all adolescents have been divided into four study groups: OSA obese (group 1; n = 28); non-OSA obese (group 2; n = 20); OSA non-obese (group 3; n = 11), and non-OSA non-obese (group 4 – control; n = 15). OSA obese adolescents had significant elevations in beta-amyloid 42 plasma levels compared with participants from three other groups (р = 0.007, p = 0.047 and p = 0.0002, correspondingly). Compared to both OSA non-obese adolescents and the control group, non-OSA obese patients had similar beta-amyloid 42 blood concentrations (p = 0.167 and p = 0.155, correspondingly). However, patients from the group 3 showed significantly higher beta-amyloid 42 plasma levels than controls (p = 0.004).Conclusions. Thus, OSA, accompanied by intermittent nocturnal hypoxia, and particularly OSA and obesity comorbidity, in adolescents is associated with increased beta-amyloid 42 circulating concentrations, which has a major role in pathogenesis of dementia. Beta-amyloid 42 plasma level may be recommended for use as early biomarker of cognitive impairment and neurodegenerative diseases, but future researches are needed

Regularities of disorders in large intestine microbiocenosis under the influence of Klebsiella oxytoca in children 6-12 months old with functional gastrointestinal disorders

Background. Functional disorders of the gastrointestinal tract represent one of the most urgent problems among children in the first year of life. Aim: to determine the peculiarities of microbiocenosis of large intestine in children with varying degrees of dysbiotic conditions of the gastrointestinal tract. Materials and methods. Material for the study included 354 coprological samples isolated from children with functional disorders of the gastrointestinal tract. Depending on the degree of dysbiotic disorders of the colon, the children were divided into comparison groups: group 1 - children with grade 1 dysbiosis (n = 15), group 2 - 45 children with grade 2 dysbiosis, group 3 consisted of 149 children with grade 3, and group 4 consisted of 145 children with grade 3 of dysbiotic disturbances and K. оxytoca vegetation. Identification was performed by standard methods. Results. All four groups were characterized with changes in the qualitative composition of the indigenous biota with predominance of E. coli with atypical properties (haemolytic (up to 26,7 %) and labourmigration activity (to 33,3 %)). Groups with grade 3 dysbiosis were characterized by the presence of aggressive symbiotes in diagnostically significant concentration of S. aureus, Clostridium spp., Candida spp., Enterobacter spp., Proteusspp., P. aeruginosa. Conclusion. The emergence of Klebsiella oxytoca in the colon of children is an evidence of the violation of compensatory-adaptive reactions of the organism, which in turn is characterized by a decrease and a change in the qualitative composition of the indigenous biota by connecting the more aggressive representatives of the bacterial agents

CHARACTERISTICS OF PITUITARY-OPVARIAN-ADRENAL AXIS IN ADOLESCENT GIRLS WITH HYPERPROLACTINEMIA OF VARIOUS GENESIS

The article presents the results of examination of 97 adolescent girls (mean age 14,96 ± 0,26 years) with hyperprolactinemia (PRL levels above 700 IU/ml): 30 adolescent girls with pituitary microprolactinoma (mean age 14,7 ± 3.2 years) and 67 adolescent girls with functional hyperprolactinemia (mean age 14,6 ± 3,4 years). The control group included 35 healthy adolescent girls (mean age 15,8 ± 0,89 years). Hyperprolactinemia (tumor and non-neoplastic) in puberty leads to disorders of sexual development and ovarian-menstrual cycle, followed by neurological symptoms. Elevated concentrations of testosterone, cortisol, DHEA, 17-OH-progesterone and LH/FSH ratio were shown in adolescents with hyperprolactinemia compared to the control group. Macroprolactinemia was estimated in 16,4—20 % of girls with hyperprolactinemia

Features of the Composition of the Colon Microbiota in Children of the First Year of Life with Functional Gastrointestinal Disorders

Background. The development of functional gastrointestinal disorders (FGID) in children, especially in the first year of life, is a key factor in the formation of an altered colon microbiota and its formation in older age. The article presents both clinical-detailed anamnesis, symptoms of FGID, and bacteriological characteristics – qualitative and quantitative composition of the colon microbiota in children of the first year of life.Aim: to determine the features of the colon microbiota in children of the first year of life with FGID.Materials and methods. The objects of the study were children of the first year of life (n = 28) with a diagnosis of FGID established by a gastroenterologist. The material was divided into two comparison groups, depending on the age of the subjects: the first group included stool sample cultures of children aged from birth to 6 months (n = 17), the second – from 6 to 12 months (n = 11). The bacteriological study of the quantitative and qualitative composition of the contents of the colon was performed using standard methods.Results. According to the anamnesis, colic and flatulence were the key symptoms of FGID (p < 0.05). The results show that the formation of FGID in children from birth to 6 months and from 6 to 12 months may be associated with altered colon microbiota. There was a decrease in the quantitative indicators of the indigenous microbiota: bifidobacteria, E. coli with normal sensitivity and Enterococcus spp., and an increase in the degree of contamination of Klebsiella spp., S. aureus, Clostridium spp.Conclusion. It is shown that the determining factor in reducing the risk of developing FGID in children of the first year of life is a high concentration and diversity of indigenous microbiota

Modern concepts of viral hepatitis (review of literature)

We conducted an analysis of Russian and foreign literature and an analysis of our researches on the problem of etiology and pathogenesis of viral hepatitis was showed. Viral hepatitis occupies a leading position among infectious disease. Chronic forms of viral hepatitis B and C is the most prevalent. Among them more than 60 % are registered in age from 20 to 39 years. In spite of the fact that pathogenesis, clinical aspects and chronization of these forms are different, they have the general processes in a liver. The changes of these processes of the general systems of an organism (such as the neuroendocrine regulation, lipid status and lipid peroxidation - antioxidant system) have the particular importance. Studying these variables under abnormalities of reproductive health in women with hepatitis is particularly topical

Thyroid status and TNF-alpha in post-reproductive women with COVID-19 and 12 months after the disease

The aim. To assess the thyroid status and its relationship with tumor necrosis factor alpha (TNF-alpha) in post-reproductive women in the acute phase of the COVID-19 of moderate course and 12 months after the disease.Materials and methods. 85 women aged 45 to 69 years were divided into groups: women without COVID-19, not vaccinated, with no antibodies to COVID-19 (IgG) – control group (n = 15); women in the acute phase of COVID-19 of a moderate course, accompanied by pneumonia – main group (n = 57); patients from the main group who agreed to be examined 12 months after having COVID-19 (n = 14); women with IgG in blood who deny any symptoms of COVID-19 in the last 12 months – asymptomatic COVID-19 (n = 13). Using hormone replacement therapy and the presence of thyroid disease in history were the exclusion criteria from the study.Results. 75.4 % of patients with COVID-19 had euthyroidism, 12.3 % had subclinical hyperthyroidism. An increase of free thyroxine (free T4) level in women with COVID-19 as compared to the control group (p = 0.004) and the group with asymptomatic COVID-19 (p = 0.054) was found. There was no statistically significant difference in the level of thyroid stimulating hormone between the groups. The level of C-reactive protein in women with COVID-19 was naturally higher as compared to the control group (p = 0.009) and the group of asymptomatic patients (p = 0.001). A lower TNF-alpha level was found in the group of patients without clinical signs of COVID-19 as compared to the control group (p = 0.007) and the group with COVID-19 (p = 0.00007). The analysis of correlation relationships revealed a positive correlation between of free T4 and TNF-alpha levels in women with COVID-19 (r = 0.38, p = 0.004).Conclusions. The moderate course of COVID-19 in the post-reproductive women is associated with an increase of free T4 level, which positively correlates with TNF-alpha level. Twelve months after COVID-19, thyroid status in women remains at the level of the acute phase of the disease

THE CHANGES OF FUNCTIONAL ACTIVITY OF A THYROID AND METABOLISM OF THYROID HORMONES IN TEENAGED GIRLS IN DIFFERENT ETHNIC GROUPS OF EASTERN SIBERIA AS AN IMPORTANT COMPONENT OF LONG-TERM ADAPTATION TO EXTREME CLIMATIC AND GEOGRAPHICAL CONDITIONS OF LIVING

Girls and teenaged girls of different ethnic groups living in Tofalaria during different age period were examined. The aim of this research was to establish the peculiarities of functioning of pituitary-thyroid system and metabolism of thyroid hormones in healthy girls and teenagers living under adverse climatic and geographical conditions depending on their ethnicity. It was set that in ethnic Tofs girls and in Europoids girls in age group of 7-11 there were differences in the content of the active fractions of thyroid hormones testifying different mechanisms of maintenance of thyroid homeostasis. These differences remain in age group of 12-14, when changes in pituitary section of the system are added to them. The functioning of pituitary-thyroid system-level of neuro-endocrine regulation in native girls of Tofalaria of 15-18 goes in more economical way. This is actually the result of genetically determined long-term adaptation of natives' organism to extreme climatic and geographical environmental factors