[Treatment strategy for complicated pancreatic pseudocysts].

Objective: To analyze an effectiveness of various surgical approaches for complicated pancreatic pseudocysts.

Material And Methods: The results of surgical treatment were analyzed in 188 patients with complicated pancreatic pseudocysts. The study included patients with one of complications of pseudocyst (infection, bleeding, compression of adjacent organs, perforation).

[Indicators of the quality of life of patients with chronic biliary pancreatitis after various options for surgical treatment].

life indicators of patients (n=365) with chronic biliary pancreatitis before the operation, 6 months and up to 10 years after surgical intervention were studied. It was found that the decrease in the quality of life of patients before surgey is mainly due to pain syndrome. After 6 months after the operation, the work capacity and physica activity are gradually restored against the background of a reduction in the pain syndrome.

[CLASSIFICATION OF ACUTE PANCREATITIS: CURRENT STATE OF THE ISSUE].

The article analyzed disadvantages of "Atlanta-92" classification of acute pancreatitis and its two modifications: APCWG-2012 and IAP-2011. The school of Saint-Petersburg pancreatologists suggested the classification AP of Russian Surgical Society (2014), which represented the concept of disease staging.

[Enzyme immunoassay system for the detection of low-avid lgG antibodies to human cytomegalovirus ("CMV-diagnost")].

The new Russian enzyme immunoassay system "CMV-Diagnost" based on the detection of low-avid IgG antibodies has been developed for the rapid diagnosis of cytomegalovirus infection. The system was found not only to determine the strained immunity in response to cytomegalovirus, but also to judge the current infection from the avidity index of detectable IgG antibodies with a high degree of validity. The antibody avidity index of less than 30% suggests an acute stage of primary cytomegalovirus infection.

[Acute pancreatitis (protocols of diagnosis and treatment)].

Protocols of diagnosis and treatment of acute pancreatitis are presented. Definition based on pathogenesis of the disease is given. Phases of acute pancreatitis, features of diagnosis and treatment in each phase are analyzed.

[A comparative evaluation of detection of antibodies to hepatitis C virus in different immunoassay test system and verification tests].

Control tests and subsequent comparative analysis of their results related with the detection of anti-hepatitis C virus (anti-HCV) by different ELISA systems were made at a laboratory of the "Vector-Best" Company, Novosibirsk (A), a clinical diagnostic laboratory of Infection Clinical Hospital No. 1, No. 1 (B), and at a laboratory of chronic viral infections of Andjaparidze Institute of Viral Drugs of the Russian Academy of Medical Sciences (C).

[Variability of the HIV-1 nef regulatory gene and its association with different HIV stages].

Biological properties of HIV-1 laboratory strains and isolates were studies and compared with research results of the nef gene fragment obtained from their proviral DNA and RNA as well as from RNA and HIV-1 DNA isolated immediately from the blood of patients at early HIV stages. The electrophoresis pattern as well as the results of determination of nucleotide sequences showed that the HVI-1 RNA nef gene of rapid/high laboratory strains of HIV isolates and RNA obtained from patients at late infection stages had a 135-nucleotide inner deletion. The phenomenon can be regarded is proof of that nef gene structure, if violated, causes an enhanced virulence of and an intensified multiplication of the virus (according to laboratory markers) observed at late HIV stages, which triggers, at least in a number of cases, the infection aggravation.

[Detection of low avidity IgG as a promising approach to diagnosis of primary herpetic infection].

A Russian immune-enzyme test-system ("HERPES-DIAGNOST") was designed on the basis of detection of low-avidity IgG antibodies in order to promote the laboratory value of serological examinations of patients with different clinical manifestations of the herpetic infection. The key test parameters were tuned; the immunosorbent production based on antigens (herpes simplex virus--HSV), types 1 and 2, was optimized; and the concentration was chosen for the main reagent that removes the low-avidity antibodies (8 M urea solution) and, finally, the temporal and temperature regimes were selected for testing. A system was elaborated for registering and interpreting the results.

[Prevalence of antibodies to hepatitis E virus among residents of different climate and geographic zones of Russia Federation].

The detection frequency of antibodies to Hepatitis E Virus (HEV) was studied in residents of the South and of the Middle European Part of the Russia Federation as well as of Siberia. Antibodies to HEV were most often found both in patients with hepatic pathologies and in subjects with diseases unrelated with a primary hepatic lesion, in particular, in patients with skin and venereal diseases and with HEV. A higher concentration of antibodies to HEV was noted also in blood donors, medical personnel and isolated communities, like prisons or psychiatric clinics.

[Minimally invasive technologies in the treatment of severe forms of acute pancreatitis at various periods of the disease].

The choice of the optimum technique of the sanitation procedure in treatment of acute necrotizing pancreatitis (ANP) is now one of the most disputable problems. Clinical estimation of the efficiency of various operative techniques of treatment of ANP at various stages of disease has been made. In the aseptic phase laparoscopic decompression of the pancreas is indicated when the patient has evident hemorrhagic parapancreatitis.

[Comparative characteristics of octreotide and famotidine in the treatment of acute pancreatitis].

Antisecretory therapy is an important and integral component of complex therapy of acute pancreatitis. The clinical estimation of efficiency of various antisecterory preparations, sandostatin and famotidin (quamatel) was made in treatment of acute pancreatitis at an early stage of the disease. The results of the research have shown that the efficiency of sandostatin and famotidin (quamatel) in treatment of not severe (mild and medium) forms of acute pancreatitis is approximately identical.

[Evaluation of the system for controlling the quality of the HBsAg detection in the system of screening laboratories].

The two-stage control system, ensuring the high quality of serological investigations in the network of screening laboratories in Moscow was developed and introduced into practice. At the first stage the entry control of the quality of the test system for the detection of HbsAg, coming to the screening laboratories, is made in the reference laboratory with the use of specially developed "representative" panels, as well as the test systems for comparison ("reference" test systems). Then "minipanels" are formed from specimens included into the "representative" panels, which are used for the evaluation of the quality of laboratory investigations made in the screening laboratories.

[Propagation of hepatitis E virus in an endemic and nonendemic regions].

The role of hepatitis E (HE) in sporadic morbidity at an endemic territory (Southern Uzbekistan) and the incidence of anti-HEV in different populations of a nonendemic region (Russia) were evaluated. Antibodies to HEV were detected in 22.1% of patients with acute HE, including mixed infections (+ HA or HB), in the Dekhkanabad district of Kashkadarya region in 1993.

[The concept of abruption of pancreatic necrosis--key to the solution of the problem of destructive pancreatitis].

The main criterion of severity of acute destructive pancreatitis (ADP) is the volume of pancreatonecrosis formed during the first 24 hours of the disease. A prognostic system is developed allowing to urgently detect the "risk group"--patients with the developing massive pancreatonecrosis by means of the assessment of clinical criteria. In the process of intensive therapy of the "risk group" patients there occurs arresting, "abruption" of the destructive process which greatly improves the results of treatment (the frequency of purulent complications decreases from 32% to 14%, lethality from 45% to 19%).

Histoprotective effect of antihypoxant olifen during experimental acute pancreatitis.

We evaluated the efficiency of perfusion with olifen in preventing oxidative stress at the early stage of acute pancreatitis. Transaortic perfusion with olifen prevented clinical and biochemical symptoms of acute pancreatitis, attenuated oxidative stress, reduced peritoneal exudation, and restricts the area of pancreatic necrosis to 6% tissue.

[Preparation of recombinant polypeptides containing antigenic determinants of hepatitis E virus].

DNA fragments complementary to hepatitis E Burma strain ORF2 and ORF3 obtained by oligonucleotide synthesis were cloned in expressing bacterial system. Recombinant polypeptides isolated from E. coli producer strains, immobilized on solid phase (polystyrene plates and nitrocellulose membranes), are studied in enzyme immunoassay to detect their ability to react with sera of patients with acute viral hepatitis from an Uzbekistan region endemic for hepatitis E.

[Antigenic specificity of recombinant polypeptides, containing fragments of hepatitis E virus proteins].

Antigenic specificity of recombinant polypeptides HE40 and HE60 containing fragments of gene ORF2 and ORF3 protein products of hepatitis E, strain Burma, produced in E. coli cells, is analyzed. Blood sera from patients with acute hepatitis from an endemic region in Uzbekistan were tested for IgG to recombinant antigens by solid-phase enzyme immunoassay with a protein fragment coded by PRF3 gene, a synthetic peptide previously characterized in a commercial test system, as the positive control.

[The detection of antibodies to the hepatitis C virus and to HBsAg in donors with viral hepatitis and cancerous diseases in the Republic of Moldova].

Large-scale and uneven distribution of hepatitis C and B (HC and HB) among free blood donors of different regions of the Moldova Republic was established. The rate of detection of anti-HCV (South 6.2%, North 3.

[The importance of the blood transfusion factor in the epidemic process in hepatitis C in the patients of chronic hemodialysis units studied using a computer simulation model].

Examinations for the presence of antibody to hepatitis C virus (HCV) were carried out in 144 patients of chronic hemodialysis wards and 83 blood donors. The anti-HCV were found in 26.4% of the patients and only in 1.

[The use of the indirect hemagglutination reaction for the serodiagnosis of HIV infection].

An assay system, based on the passive hemagglutination test and permitting the serodiagnosis of HIV infection with correct results in more than 99% of cases, has been developed. Three kinds of freeze-dried erythrocyte diagnostica (with shelf life exceeding 6 months), possessing high serological activity and sensitized with recombinant gene-engineering polypeptides, have been obtained. The proposed assay system is highly promising for mass examination of sera for the presence of antibodies to HIV due to the simplicity of assay techniques, the possibility of storing the diagnostica within a wide range of temperatures (4 degrees-30 degrees C) and obtaining results in a short time (3 hours).

[Molecular and cytologic analyses of the transcription of evolutionarily conservative moderately repetitive sequences of vertebrate genomes].

Transcription of several families of moderately repeated sequences, conserved through the evolution of vertebrates, has been studied in different types of pigeon, chicken and mouse cells. It is shown both by hybridization with isolated RNA and by in situ hybridization that the families of repeats, dispersed in bird genomes and organized in clusters, are differentially expressed in pigeon erythroid cells with different degrees of specialization; in addition, they are transcribed in different types of chick embryo cells and on lampbrush chromosomes in chicken oocytes. Sequences homologous to these repeats were transcribed in different types of newborn mouse cells.

[Molecular and cytologic analysis of clusters of moderate repeats of bird genomes].

Pigeon genome long sequences containing clusters of moderately repeating elements have been cloned. Molecular analysis has shown a dispersed distribution of the repeats in both pigeon and chicken genomes. Within a single cluster, a scrambled distribution of elements belonging to different families of repeats has been shown.

[Introduction of DNA sequences of Rous sarcoma virus into Drosophila and mouse genomes by microinjections into ova].

The paper covers experimental results of introducing exogenic genetic material, namely DNA sequences of the Rous sarcoma virus, by microinjections in mice zygotes and Drosophila early embryos. In a number of cases integration of viral DNA into genomes of these organisms was detected. Blot-hybridizations analysis of cell DNA proved that the inserted viral sequences undergo rearrangements in the course of integration.

[Size and organization of repetitive sequences in pigeon genome].

Organization of sequences in pigeon genome and the spectrum of their repetition frequencies were studied by means of DNA/DNA reassociation. Reassociation of 125I-labelled DNA fractions isolated from pigeon total DNA attested the presence of rare repetitions with an average of 50 copies within a gaploid genome. The disposition of repetitive and unique sequences was studied by reassociation of the labelled fragments of different length with an essential excess of short fragments of an unlabelled DNA.