Nf Gamaleya Federal Research Center For Epidemiology And Microbiology

Moscow, Russia

Nf Gamaleya Federal Research Center For Epidemiology And Microbiology

Moscow, Russia
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Stolyarenko G.E.,Posterior Segment Eye Surgery and Diagnostics Center | Kolchin A.A.,Posterior Segment Eye Surgery and Diagnostics Center | Didenko L.V.,Nf Gamaleya Federal Research Center For Epidemiology And Microbiology | Borovaya T.G.,Nf Gamaleya Federal Research Center For Epidemiology And Microbiology | Shevlyagina N.V.,Nf Gamaleya Federal Research Center For Epidemiology And Microbiology
Vestnik Oftalmologii | Year: 2016

To date, the internal limiting membrane (ILM), specifically, the side facing the retina, has never been studied by two parallel, mutually complementary methods. This is an attempt to explain favorable results of ILM peeling in various macular pathologies. Aim - by employing scanning (SEM) and transmission electron microscopy (TEM), to identify morphological features of epiretinal samples removed during vitrectomy in patients with lamellar macular hole (LMH) or epiretinal membrane (ERM). Material and methods. We studied 23 eyes of 23 patients divided into two groups. The first group (13 samples, 11 eyes) consisted of patients with LMH; the second (12 samples, 12 eyes) - with ERM. The surgeries yielded a total of 21 epiretinal samples peeled simultaneously with the ILM and 4 epiretinal samples (2 eyes) peeled in two parts, the second part containing the ILM. One half of the samples was studied by SEM without prior dehydratation, the other - by TEM. Results. The study revealed a high degree of ultrastructural similarity between the two groups of ILM samples. Judging from SEM findings, two sides of the membrane were clearly identified. Porous coral-like structures (PCS) were discovered on the side facing the retina. TEM in the area of PCS discovered parallel arrangement of multiple Muller cell (MC) bodies and processes separated by wide layers of the intercellular matrix. The vitreal side of all ILM samples was notable for numerous fibroblast-like cells. Many variously shaped petrified structures were found on both sides of the membrane. Conclusion. During the so called ILM peeling, the surgeon removes a layered structure that includes the basal membrane of MC, cells and fibers attached to its vitreal side, and one more layer comprised by PCS and rather readily torn off from the main massif. The functional significance of this previously unknown structure as well as the effect of its partial removal during surgical manipulations with neurosensory retina in the macular region is yet to be investigated.


Vasileva E.V.,Nf Gamaleya Federal Research Center For Epidemiology And Microbiology | Kudryavtsev I.V.,Far Eastern Federal University | Maximov G.V.,City Anti Tuberculosis Despensary | Verbov V.N.,St Petersburg Pasteur Institute | And 3 more authors.
Russian Journal of Infection and Immunity | Year: 2017

Tuberculosis is the leading cause of death among HIV infected individuals. In this regard, an important task is the timely detection of tuberculosis in HIV infected patients. Previously, we have shown that the diagnostic value of in vitro test, QuantiFERON-TB Gold In-Tube is not decreased in patients with HIV infection against the background of tuberculosis. However, it remains unclear what kind of cell populations produce IFNγin response to specific Mycobacterium tuberculosis antigens stimulation in vitro, because the immunodeficiency, caused by HIV, makes primarily for a decrease the abundance and attenuation functions of CD4 T-lymphocytes. The aim of this work was to compare the degree of differentiation of T-lymphocytes CD4 (Th) and CD8 (Tcyt) in patients with pulmonary tuberculosis and healthy donors against the background of HIV infection. The study data were obtained during the examination of 28 patients with pulmonary tuberculosis without HIV infection (HIV-TB+), 23 patients with HIV infection (TB-HIV+) and 30 patients coinfected with HIV and tuberculosis (TB+HIV+). The comparison group consisted of 37 healthy individuals (TB-HIV-). Absolute and abundance (relative content) of major subpopulations of T-lymphocytes (based on the expression of CD27 marker, CD28, CD45RA and CD62L) in the peripheral blood for all patients included in the study (n = 118) were evaluated by flow cytometry approach. For patients with pulmonary tuberculosis (n = 58) QuantiFERON-TB Gold In Tube (Qiagen, QFT) test was performed. Th/Tcyt ratio was not significantly different among the groups of TB-HIV- and TB+HIV- (1.76 [1.51; 2.30] against 1.86 [1.22; 2.79], p = 0.960). At that time, the size of both subpopulations "terminally differentiated" Tcyt (Tcyt Eff, CD27-CD28- CD62L-CD45RA-) Th lymphocytes and effector memory lymphocytes (Th EM, CD27-CD28+CD62L-CD45RA-), was significantly different in all four study groups. Multidirectional changes of the absolute and abundance (relative content) in these cell populations in comparison with healthy donors for tuberculosis and HIV infection was noticed. Absolute content of Tcyt Eff, compared with healthy donors (76.1 [20.7; 143.5]), 4-fold increases in the group of HIV+TB+ and 2 times in groups TB+HIV- and TB-HIV+. Th EM content increases only at TB+HIV- group compare to healthy donors. In groups of patients with HIV infection (TB-HIV+ and TB+HIV+) a decrease in the content of these cells was observed. Thus, our work shows that the population of Th EM and Tcyt Eff could potentially be viewed as universal biomarkers for two socially significant infectious diseases: tuberculosis and HIV infection. In future experiments, it is necessary to validate these results to ensure specificity and determine the number of Th EM and Tcyt Eff specificly induced by Mtb antigens.


Voronina O.L.,Nf Gamaleya Federal Research Center For Epidemiology And Microbiology | Kunda M.S.,Nf Gamaleya Federal Research Center For Epidemiology And Microbiology | Ryzhova N.N.,Nf Gamaleya Federal Research Center For Epidemiology And Microbiology | Aksenova E.I.,Nf Gamaleya Federal Research Center For Epidemiology And Microbiology | And 5 more authors.
BioMed Research International | Year: 2015

Background and Aim: The order Burkholderiales became more abundant in the healthcare units since the late 1970s; it is especially dangerous for intensive care unit patients and patients with chronic lung diseases. The goal of this investigation was to reveal the real variability of the order Burkholderiales representatives and to estimate their phylogenetic relationships. Methods: 16S rDNA and genes of the Burkholderia cenocepacia complex (Bcc) Multi Locus Sequence Typing (MLST) scheme were used for the bacteria detection. Results: A huge diversity of genome size and organization was revealed in the order Burkholderiales that may prove the adaptability of this taxon's representatives. The following variability of the Burkholderiales in Russian healthcare units has been revealed: Burkholderiaceae (Burkholderia, Pandoraea, and Lautropia), Alcaligenaceae (Achromobacter), and Comamonadaceae (Variovorax). The Burkholderia genus was the most diverse and was represented by 5 species and 16 sequence types (ST). ST709 and 728 were transmissible and often encountered in cystic fibrosis patients and in hospitals. A. xylosoxidans was estimated by 15 genotypes. The strains of first and second ones were the most numerous. Conclusions: Phylogenetic position of the genus Lautropia with smaller genome is ambiguous. The Bcc MLST scheme is applicable for all Burkholderiales representatives for resolving the epidemiological problems. © 2015 Olga L. Voronina et al.


PubMed | Research Institute of Pulmonology FMBA of Russia and Nf Gamaleya Federal Research Center For Epidemiology And Microbiology
Type: | Journal: BioMed research international | Year: 2015

The order Burkholderiales became more abundant in the healthcare units since the late 1970s; it is especially dangerous for intensive care unit patients and patients with chronic lung diseases. The goal of this investigation was to reveal the real variability of the order Burkholderiales representatives and to estimate their phylogenetic relationships.16S rDNA and genes of the Burkholderia cenocepacia complex (Bcc) Multi Locus Sequence Typing (MLST) scheme were used for the bacteria detection.. A huge diversity of genome size and organization was revealed in the order Burkholderiales that may prove the adaptability of this taxons representatives. The following variability of the Burkholderiales in Russian healthcare units has been revealed: Burkholderiaceae (Burkholderia, Pandoraea, and Lautropia), Alcaligenaceae (Achromobacter), and Comamonadaceae (Variovorax). The Burkholderia genus was the most diverse and was represented by 5 species and 16 sequence types (ST). ST709 and 728 were transmissible and often encountered in cystic fibrosis patients and in hospitals. A. xylosoxidans was estimated by 15 genotypes. The strains of first and second ones were the most numerous.Phylogenetic position of the genus Lautropia with smaller genome is ambiguous. The Bcc MLST scheme is applicable for all Burkholderiales representatives for resolving the epidemiological problems.


Voronina O.L.,Nf Gamaleya Federal Research Center For Epidemiology And Microbiology | Kunda M.S.,Nf Gamaleya Federal Research Center For Epidemiology And Microbiology | Ryzhova N.N.,Nf Gamaleya Federal Research Center For Epidemiology And Microbiology | Aksenova E.I.,Nf Gamaleya Federal Research Center For Epidemiology And Microbiology | And 3 more authors.
BioMed research international | Year: 2016

Biofilm formation by Burkholderia spp. is a principal cause of lung chronic infections in cystic fibrosis patients. A "lacking biofilm production" (LBP) strain B. contaminans GIMC4587:Bct370-19 has been obtained by insertion modification of clinical strain with plasposon mutagenesis. It has an interrupted transcriptional response regulator (RR) gene. The focus of our investigation was a two-component signal transduction system determination, including this RR. B. contaminans clinical and LBP strains were analyzed by whole genome sequencing and bioinformatics resources. A four-component operon (BiofilmReg) has a key role in biofilm formation. The relative location (i.e., by being separated by another gene) of RR and histidine kinase genes is unique in BiofilmReg. Orthologs were found in other members of the Burkholderiales order. Phylogenetic analysis of strains containing BiofilmReg operons demonstrated evidence for earlier inheritance of a three-component operon. During further evolution one lineage acquired a fourth gene, whereas others lost the third component of the operon. Mutations in sensor domains have created biodiversity which is advantageous for adaptation to various ecological niches. Different species Burkholderia and Achromobacter strains all demonstrated similar BiofilmReg operon structure. Therefore, there may be an opportunity to develop a common drug which is effective for treating all these causative agents.


Tkachuk A.P.,Nf Gamaleya Federal Research Center For Epidemiology And Microbiology | Gushchin V.A.,Moscow State University | Potapov V.D.,State Research Center for Applied Microbiology and Biotechnology | Demidenko A.V.,Nf Gamaleya Federal Research Center For Epidemiology And Microbiology | And 2 more authors.
PLoS ONE | Year: 2017

New innovative vaccines are highly needed to combat the global threat posed by tuberculosis. Efficient components±antigens and adjuvants±are crucial for development of modern recombinant TB vaccines. This study describes a new vaccine (GamTBvac) consisting of two mycobacterial antigen fusions (Ag85A and ESAT6-CFP10)±with dextran-binding domain immobilized on dextran and mixed with an adjuvant consisting of DEAE-dextran core, and with CpG oligodeoxynucleotides (TLR9 agonists). GamTBvac and its components were assessed for immunogenicity and protective efficacy in GamTBvac-prime/boost and BCG-prime/ GamTBvac-boost in murine and Guinea pig TB models. Results show that in both infectious models, GamTBvac has a strong immunogenicity and significant protective effect against Mycobacterium tuberculosis strain H37Rv under aerosol and intravenous challenges. GamTBvac showed a particularly strong protective effect as a BCG booster vaccine. © 2017 Tkachuk et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Meerovich G.A.,RAS A.M. Prokhorov General Physics Institute | Tiganova I.G.,Nf Gamaleya Federal Research Center For Epidemiology And Microbiology | Makarova E.A.,Organic Intermediates and Dyes Institute | Meerovich I.G.,Russian Academy of Sciences | And 11 more authors.
Journal of Physics: Conference Series | Year: 2016

This work is devoted to the study of two new synthetic bacteriochlorins with four and eight cationic substitutes as the photosensitizers in the photodynamic process. The spectral and antibacterial properties of these photosensitizers in saline solution were investigated. It is shown, that the aggregation ability decreases and the antibacterial efficiency grows as the cationic substitute number increases. © Published under licence by IOP Publishing Ltd.


PubMed | Central Research Institute of Epidemiology, Morozov City Childrens Clinical Hospital and Nf Gamaleya Federal Research Center For Epidemiology And Microbiology
Type: Journal Article | Journal: Terapevticheskii arkhiv | Year: 2016

Pneumocystosis is well known as an opportunistic infection that is presently most frequently registered in patients with HIV infection and in those with other immunodeficiency states. Earlier, after the Second World War, Pneumocystis pneumonia was most commonly detected in debilitated and premature children; nosocomial outbreaks of pneumocystosis were studied in detail in the 1960s and 1970s. The pathogen is transmitted through the air, but a number of references indicate that it can be transmitted through the placenta. Despite the increasing number of publications on pneumocystosis in pediatrics, physicians remain unfamiliar with this disease. The paper provides evidence that Pneumocystis jiroveci can infect the fetus in utero. If unrecognized, the disease can lead to a childs death due to severe respiratory failure. The authors describe their case of generalized pneumocystosis that has developed in a child with evidence of intrauterine infection (detection of the pathogen in the autopsy material and placenta and identification of serological markers in his/her parents). The issues that are associated with intrafamilial infection and a risk for in utero transmission of P. jiroveci are discussed.


PubMed | Posterior segment eye surgery and diagnostics center and Nf Gamaleya Federal Research Center For Epidemiology And Microbiology
Type: Journal Article | Journal: Vestnik oftalmologii | Year: 2017

To date, the internal limiting membrane (ILM), specifically, the side facing the retina, has never been studied by two parallel, mutually complementary methods. This is an attempt to explain favorable results of ILM peeling in various macular pathologies.By employing scanning (SEM) and transmission electron microscopy (TEM), to identify morphological features of epiretinal samples removed during vitrectomy in patients with lamellar macular hole (LMH) or epiretinal membrane (ERM).We studied 23 eyes of 23 patients divided into two groups. The first group (13 samples, 11 eyes) consisted of patients with LMH; the second (12 samples, 12 eyes) - with ERM. The surgeries yielded a total of 21 epiretinal samples peeled simultaneously with the ILM and 4 epiretinal samples (2 eyes) peeled in two parts, the second part containing the ILM. One half of the samples was studied by SEM without prior dehydratation, the other - by TEM.The study revealed a high degree of ultrastructural similarity between the two groups of ILM samples. Judging from SEM findings, two sides of the membrane were clearly identified. Porous coral-like structures (PCS) were discovered on the side facing the retina. TEM in the area of PCS discovered parallel arrangement of multiple Muller cell (MC) bodies and processes separated by wide layers of the intercellular matrix. The vitreal side of all ILM samples was notable for numerous fibroblast-like cells. Many variously shaped petrified structures were found on both sides of the membrane.During the so called ILM peeling, the surgeon removes a layered structure that includes the basal membrane of MC, cells and fibers attached to its vitreal side, and one more layer comprised by PCS and rather readily torn off from the main massif. The functional significance of this previously unknown structure as well as the effect of its partial removal during surgical manipulations with neurosensory retina in the macular region is yet to be investigated.

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