[Health-saving practices of older city dwellers in the context of delayed aging.].

The main purpose of the study: to analyze the ideas of older people about ways to influence their own health and their health promoting behavior. The study considers the elderly as an active agent that can influence their own health. Based on the materials of 25 in-depth interviews, 4 thematic blocks related to health were analyzed.

Prevalence and Structure of HIV-1 Drug Resistance to Antiretrovirals in the Volga Federal District in 2008-2019.

The increasing number of HIV-infected people who are receiving ART, including those with low adherence, is causing the spread of HIV drug resistance (DR). A total of 1396 plasma samples obtained from treatment-experienced patients from the Volga federal district (VFD), Russia, were examined to investigate HIV DR occurrence. The time periods 2008−2015 and 2016−2019 were compared.

Quantitative Assay of B. pertussis Lipopolysaccharide.

We studied activity of Bordetella pertussis LPS in the LAL test. The mean activity of various series of LPS preparations obtained from B. pertussis cells ranged from 1,950,000 to 2,940,000 endotoxin units/μg (EU/μg).

[Myostatin - a modern understanding of the physiological role and significance in the development of age-associated diseases.].

Myostatin is a protein belonging to the myokine class, the family of transforming growth factors β (TGF-β). The review article, based on the analysis of literature data, shows the key role of myostatin in the development of senile sarcopenia and cachexia in various pathological conditions, such as cancer, chronic heart failure, chronic renal failure, COPD, etc. The article discusses the structure of myostatin, provides a detailed diagram of the synthesis and activation of myostatin, the ways of implementing the mechanism of action as a negative regulator of muscle growth and differentiation in these pathological conditions.

Follistatin-Like Proteins: Structure, Functions and Biomedical Importance.

Main forms of cellular signal transmission are known to be autocrine and paracrine signaling. Several cells secrete messengers called autocrine or paracrine agents that can bind the corresponding receptors on the surface of the cells themselves or their microenvironment. Follistatin and follistatin-like proteins can be called one of the most important bifunctional messengers capable of displaying both autocrine and paracrine activity.

[Study of the influence of etoxidol on expression of follistatin-like protein-1 (FSTL-1) in myocardium after experimental infarction in rats].

In heart attack, FSTL-1 is actively secreted by cardiomyocytes, accelerates growth of heart myofibrils and stimulates of vascular endothelial growth factor expression. The aim of this work was to investigate the effect of Etoxidol on synthesis of FSTL-1 in rats after myocardial infarction. The experiments were performed on Wistar rats weighing 250-350 g with simulated myocardial infarction or intact (group 5).

The Mechanism of Action of Ethoxidol on Oxidative Stress Indices in Heart Failure and Hypotension.

Unlabelled: was to study the effect of 2-ethyl-6-methyl-3-hydroxypyridine malate (Ethoxidol) on the concentration of oxidative stress metabolites in patients with chronic heart failure (CHF) and hypertension.

Materials And Methods: 126 patients with FC I-III CHF have been examined. In addition to their individual therapy these patients received intravenous infusions of Ethoxidol.

[Older people during the COVID-19 pandemic in the big city: the example of Saint-Petersburg.].

One of the most vulnerable groups during the COVID-19 pandemic was the older people. This is due not only to the danger of the disease itself and its consequences, but also to the conditions of quarantine restrictions. Based on the materials of 26 interviews with representatives of the older people (from 63 to 87 years old), we analyzed how older people experienced the pandemic in St.

[Yhe pre-analytic stage in studies of surveillance of HIV strains resistant to anti-retrovirus preparations in the Privolzhskiy Federal Okrug].

The article presents analysis of activities concerning organization of pre-analytic stage of monitoring of HIV resistance to anti- retrovirus preparations on territories of the Privolzhskiy Federal Okrug. The medical records of patients receiving anti-retrovirus therapy and appointment cards to detect drug resistance of HIV from territorial centers of prevention and control of AIDS and infectious diseases are analyzed. The results of testing of specialists of service of prevention of AIDS/HIV with questionnaire "Characteristics of pre-analytical stage under implementation of molecular genetic and immunologic analyses" developed in the Privolzhskiy okrug center of prevention and control ofAIDS and samples of bio-tests obtained during coming-outs in regions of okrug were included into analysis too.

[Epidemic variants of norovirus genotype GII.4 in Nizhny Novgorod in 2006 - 2012].

Aim: Genotyping of noroviruses that had circulated in the territory of Nizhny Novgorod during 6 epidemic seasons (2006 - 2012), detection of dominating genovariants and analysis of their change.

Materials And Methods: Feces samples from children hospitalized in an intestinal infection department of one of the infectious disease hospitals of Nizhny Novgorod served as material for the study. Noroviruses were detected by reverse transcription polymerase chain reaction.

[Analysis of the prevalence of HIV resistant strains to antiretroviral drug in Privolzhsky Federal District].

Prevalence of the primary drug resistance mutations and resistance developed in patients receiving highly active antiretroviral therapies in the HIV-infected persons in the Privolzhsky federal district was studied. It was demonstrated that among the ART-naive HIV-positive patients there were no mutations leading to the development of resistance. A high level of the resistance to lamivudin, nevirapin, efavirenz was revealed among the persons receiving the antiretroviral therapy.

[Prevalence, features of circulation, and diversity of human parechoviruses in Nizhny Novgorod].

A total of 5230 specimens from children with gastroenteritis collected in Nizhny Novgorod in 2006-2010 were screened for human parechoviruses (HPeV). HPeV were observed every year with mean frequency of 6.16%.

[Molecular-genetic characteristic of astroviruses circulating in Nizhny Novgorod].

Aim: Genotyping ofastroviruses isolated from children with acute enteric infection (AEI) on the territory of Nizhny Novgorod in 2006 - 2011.

Materials And Methods: Samples of feces from children hospitalized in intestine infection department of a Nizhny Novgorod infectious diseases hospitals served as study material. Astroviruses were detected by reverse transcription polymerase chain reaction method.

[Molecular genetic echovirus 9 variants identified in patients with aseptic meningitis in Russia in 2007-2009].

In 2009 echovirus 9 caused a higher seasonal incidence of enterovirus infection (EVI) and its several outbreaks in a number of regions of Russia. Analysis of the partial VP1 coding region differentiated 4 phylogenetic lineages of echoviruses 9 variants identified in patients with aseptic meningitis and EVI in 2007-2009. One variant of echovirus 9 was most commonly encountered in 2009.

[The prognostic role of interleukin-6 in peritoneal exudate of patients with diffuse peritonitis].

A prospective longitudinal controlled investigation of 189 patients with secondary diffuse peritonitis was performed. A correlation between the levelof interleuikin-6 of peritoneal exudate, the severity of the patients' state, the number of complications and outcome of the course of the disease was established. The maximal number of complications and unfavorable outcomes falls on the peak value ofinterleuikin-6.

[Determinant of plasmid pBS221 resistance to potassium tellurite].

The genes regulating resistance to potassium tellurite were cloned from plasmid pS221 with a broad host range. The studied DNA fragment encodes for the synthesis of two polypeptides with molecular mass of 38 and 43 kD. Metal tellurium crystals were localized in the periplasm of Pseudomonas aeruginosa ML4262 (pBS221) cells by electron microscopy.

[Genetic control of tetracycline resistance in bacteria].

Modern data on prevalence, structural and functional organization of the tetracycline resistance determinants in bacteria are reviewed. The three mechanisms of the antibiotic resistance are the tetracycline efflux, the ribosomal protection and the antibiotic modification. The problems of evolution of tetracycline resistance genes are discussed.

[Genetic determinants of tetracycline resistance of plasmids from the bacterial species Pseudomonas].

The colony hybridization and tetracycline accumulation techniques made possible to demonstrate the majority of the 29 bacteria of Pseudomonas genera to harbour the plasmids carrying tet determinants belonging to classes A-C, while one strain contained a plasmid carrying tet determinant of class B. For the first time the determinants of classes D and E were found on R plasmids in Pseudomonas aeruginosa. The determinant of G class was identified on two plasmids identical to pBS221 plasmid described previously.

[Structural-functional organization of the incompatibility group P plasmid pBS221].

Plasmid pBS221 was physically mapped for restriction endonucleases EcoRI, BamHI, BglII, HindIII. The regions essential for the plasmid existence and participating in replication (oriV trfA*) and mobilization (mob) were cloned. The tet determinant and oriV trfA* regions were localized on the physical map of the plasmid.

[Cloning and expression of the determinant for resistance to a new class of tetracycline in Escherichia coli strains].

Tetracycline-resistance determinant of the plasmid pBS221 isolated from a Pseudomonas aeruginosa strain has been cloned on pUC19 vector plasmid. The determinant is expressed under aerobic and anaerobic conditions coding for two proteins: a 36 Kd protein conferring antibiotic resistance and 27 Kd repressor protein. The determinant is not homologous to tet-determinants of the known classes as shown by blot hybridization experiments.