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    Wyświetlanie 1-6 z 6
    Tytuł:
    Evaluation of clinical usefulness of serum neopterin determination in children with bacterial infections
    Autorzy:
    Plata-Nazar, Katarzyna
    Luczak, Grażyna
    Liberek, Anna
    Dudzinska-Gehrmann, Julita
    Sznurkowska, Katarzyna
    Landowski, Piotr
    Kaminska, Barbara
    Powiązania:
    https://bibliotekanauki.pl/articles/1039150.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    neopterin
    children
    urinary tract infections
    Opis:
    Neopterin (NPT) (6-D-erythro-trihydroxypropyl pteridin) is one of the indicators of the immune system activity. Elevated neopterin concentration occurs in diseases mostly involving stimulation of cellular immunity. The determination of neopterin concentration, usually in blood serum and urine but also in many other bodily fluids, has already been applied in many areas of medicine, such as transfusiology, transplantology, oncology, infectious diseases and autoimmunological diseases. Objective. The aim of this work is to evaluate clinical usefulness of serum neopterin determination in children with urinary tract infections of confirmed bacterial etiology. Material. The study involved 56 children with bacterial urinary tract infections - patients of the Clinic of Paediatrics, Paediatric Gastroenterology, Hepatology & Paediatric Nutrition of Medical University of Gdańsk in the years 2012-2013. The control group included 105 healthy children. Results. The values of NPT concentration in blood serum obtained in the group of children with urinary tract infections did not significantly differ from the values obtained in the control group. Conclusions. The determination of neopterin concentration in children with bacterial urinary tract infections is not a clinically useful parameter.
    Źródło:
    Acta Biochimica Polonica; 2015, 62, 1; 133-137
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Factors affecting decision concerning influenza vaccination among students of medical faculties
    Autorzy:
    Woźniak-Kosek, Agnieszka
    Kempińska-Mirosławska, Bogumiła
    Mendrycka, Mariola
    Saracen, Agnieszka
    Hoser, Grażyna
    Powiązania:
    https://bibliotekanauki.pl/articles/1039225.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    influenza
    vaccination against influenza- knowledge
    infections
    students
    Opis:
    Influenza is one of the most common cyclic respiratory diseases in humans. Methods of prevention are multidirectional, but the most effective and most efficacious way to prevent influenza and its complications is through preventive vaccination. This work aims to determine different factors affecting the decision concerning influenza vaccine. The percentage of people vaccinated against the flu was evaluated, as well as their knowledge of post-influenza complications, etc. among full-time students and bridging studies of nursing and physiotherapy (full-time and part-time) at the University of Technology and Life Sciences in Radom, and students of medicine and pharmacy at the Medical University of Łódź. The research tool was the authors' questionnaire with 18 questions. The surveys conducted, consisting of multiple choice questions, were anonymous. In total, the survey involved 470 students. Overall, the number of people who were vaccinated against influenza in the 2012/13 epidemic season numbered 15 respondents, representing 5.84% of the total group of respondents. For the group of nursing students it was 6%, for physiotherapy students 5%, for students of medicine and pharmacy 14%. The percentage of respondents who said they would get vaccinated if the vaccinaton was free of charge was also low. Increasing the percentage of people vaccinated against influenza (immunization coverage) is a very important measure in preventing influenza epidemics. Therefore, it is necessary to identify the reasons why people are reluctant to be vaccinated against influenza, particularly among students who will work in the future in the health care services sector.
    Źródło:
    Acta Biochimica Polonica; 2014, 61, 4; 829-832
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of uropathogenic Escherichia coli biofilm formation under different growth conditions
    Autorzy:
    Adamus-Białek, Wioletta
    Kubiak, Anna
    Czerwonka, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/1038911.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    biofilm
    uropathogenic Escherichia coli
    urinary tract infections
    Opis:
    The ability to form different types of biofilm enables bacteria to survive in a harsh or toxic environment. Different structures of biofilms are related to different surfaces and environment of bacterial growth. The aim of this study was analysis of the biofilm formation of 115 clinical uropathogenic Escherichia coli strains under different growth conditions: surface for biofilm formation, medium composition and time of incubation. The biofilm formation after 24 h, 48 h, 72 h and 96 h was determined spectrophotometrically (A531) after crystal violet staining and it was correlated with bacterial growth (A600). The live and dead cells in biofilm structures was also observed on the glass surface by an epi-fluorescence microscope. Additionally, the presence of rpoS, sdiA and rscA genes was analyzed. The statistical significance was estimated by paired T-test. The observed biofilms were different for each particular strain. The biofilm formation was the highest in the rich medium (LB) after 24 h and its level hasn't changed in time. When biofilm level was compared to bacterial growth (relative biofilm) - it was higher in a minimal medium in comparison to enriched medium. These results suggest that most of the bacterial cells prefer to live in a biofilm community under the difficult environmental conditions. Moreover, biofilm formation on polyurethane surface did not correlate with biofilm formation on glass. It suggests that mechanisms of biofilm formation can be correlated with other bacterial properties. This phenomenon may explain different types of biofilm formation among one species and even one pathotype - uropathogenic Escherichia coli.
    Źródło:
    Acta Biochimica Polonica; 2015, 62, 4; 765-771
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Real-time PCR approach in dermatophyte detection and Trichophyton rubrum identification
    Autorzy:
    Kobylak, Natalia
    Bykowska, Barbara
    Nowicki, Roman
    Brillowska-Dąbrowska, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/1039146.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    fungal infections
    dermatophytosis
    DNA extraction
    real-time PCR
    Opis:
    Dermatophytes are keratinophilic molds that infect human hair, nails and skin. Diagnosis of dermatophytosis is based on morphological, serological and biochemical features. However, identification is difficult and laborious due to similarities between microorganisms. Thus, there is considerable interest to develop mycological diagnostic procedures based on molecular biology methods. In this study, fast, two-step DNA extraction method and real-time PCR was used for detection of dermatophytes DNA using pan-dermatophyte primers and identification of Trichophyton rubrum from pure cultures. The applied method allowed correct detection of all dermatophytes and correct identification of Trichophyton rubrum in less than 2 hours.
    Źródło:
    Acta Biochimica Polonica; 2015, 62, 1; 119-122
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multiplex real-time PCR to identify a possible reinfection with different strains of human cytomegalovirus in allogeneic hematopoietic stem cell transplant recipients
    Autorzy:
    Zawilinska, Barbara
    Szostek, Slawa
    Kopec, Jolanta
    Piatkowska-Jakubas, Beata
    Kosz-Vnenchak, Magdalena
    Powiązania:
    https://bibliotekanauki.pl/articles/1038859.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    HCMV gB genotypes
    multiple HCMV infections
    reactivation and reinfection
    allo-HSCT
    Opis:
    Human cytomegalovirus (HCMV) infection remains the leading cause of serious contagious complications after allogeneic hematopoietic stem cell transplantation. These infections in HCMV-seropositive recipients can be due to reactivation or reinfection. Different HCMV strains were identified by determining the genotypes isolated from repeatedly tested patients. The UL55 sequences encoding viral glycoprotein B (gB) have been chosen as the target gene. The region, in which the gB precursor protein is cleaved into two fragments by a cellular endoprotease, is characterized by genetic variability, and based on that HCMV is classified into four major genotypes: gB1, gB2, gB3 and gB4. Multiplex real-time PCR assay enabled both, HCMV gB genotyping, as well as simultaneous quantitative assessment of the detected genotypes. This study was carried out in 30 transplant recipients, from whom 105 isolates of HCMV DNA were genotyped. In 40% of recipients, a mixed infection with two or three genotypes was detected. Genotype gB1 dominated in general, and characteristically for mixed infections, the genotype gB3 or gB4 was always present. Although there were no significant differences in the load for each genotype, in case of multiple infections, the number of copies of gB1 genotype was significantly higher when compared to a single gB1 infection. In patients with mixed genotypes, chronic HCMV infections and graft versus host disease were observed more often, as well as antiviral treatment was less effective. It was assumed that these adverse effects can be related to the presence of gB3 and gB4 genotypes.
    Źródło:
    Acta Biochimica Polonica; 2016, 63, 1; 161-166
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Glucosamine-6-phosphate synthase, a novel target for antifungal agents. Molecular modelling studies in drug design.
    Autorzy:
    Wojciechowski, Marek
    Milewski, Sławomir
    Mazerski, Jan
    Borowski, Edward
    Powiązania:
    https://bibliotekanauki.pl/articles/1041368.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    drug design
    glucosamine-6-phosphate synthase
    fungal infections
    glutamine amidotransferases
    molecular modelling
    Opis:
    Fungal infections are a growing problem in contemporary medicine, yet only a few antifungal agents are used in clinical practice. In our laboratory we proposed the enzyme L-glutamine : D-fructose-6-phosphate amidotransferase (EC 2.6.1.16) as a new target for antifungals. The structure of this enzyme consists of two domains, N-terminal and C-terminal ones, catalysing glutamine hydrolysis and sugar-phosphate isomerisation, respectively. In our laboratory a series of potent selective inhibitors of GlcN-6-P synthase have been designed and synthesised. One group of these compounds, including the most studied N3-(4-methoxyfumaroyl)-l-2,3-diaminopropanoic acid (FMDP), behave like glutamine analogs acting as active-site-directed inactivators, blocking the N-terminal, glutamine-binding domain of the enzyme. The second group of GlcN-6-P synthase inhibitors mimic the transition state of the reaction taking place in the C-terminal sugar isomerising domain. Surprisingly, in spite of the fact that glutamine is the source of nitrogen for a number of enzymes it turned out that the glutamine analogue FMDP and its derivatives are selective against GlcN-6-P synthase and they do not block other enzymes, even belonging to the same family of glutamine amidotransferases. Our molecular modelling studies of this phenomenon revealed that even within the family of related enzymes substantial differences may exist in the geometry of the active site. In the case of the glutamine amidotransferase family the glutamine binding site of GlcN-6-P synthase fits a different region of the glutamine conformational space than other amidotransferases. Detailed analysis of the interaction pattern for the best known, so far, inhibitor of the sugar isomerising domain, namely 2-amino-2-deoxy-d-glucitol-6-phosphate (ADGP), allowed us to suggest changes in the structure of the inhibitor that should improve the interaction pattern. The novel ligand was designed and synthesised. Biological experiments confirmed our predictions. The new compound named ADMP is a much better inhibitor of glucosamine-6-phosphate synthase than ADGP.
    Źródło:
    Acta Biochimica Polonica; 2005, 52, 3; 647-653
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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