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Wyszukujesz frazę "Wyrwicz, Lucjan" wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Barretts esophagus associates with a variant of IL23R gene
    Autorzy:
    Gaj, Pawel
    Mikula, Michal
    Wyrwicz, Lucjan
    Regula, Jaroslaw
    Ostrowski, Jerzy
    Powiązania:
    https://bibliotekanauki.pl/articles/1040756.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    Barrett's esophagus
    risk
    SNP
    IL23R
    association study
    Opis:
    Gastroesophageal reflux disease is regarded as a spectrum of diseases: non-erosive reflux disease (NERD), erosive reflux disease (ERD), and the far end of the spectrum represented by patients with Barrett's esophagus. Among predisposing factors, both risk and protective polymorphic variants of several genes may influence the clinical outcomes of reflux disease. Consequently, different molecular mechanisms are likely to underlie the development of clinical variants of reflux disease. Ninety six patients with reflux disease were screened for polymorphisms of CARD15, SLC22A4 (OCTN1), SLC22A5 (OCTN2), DLG5, ATG16L1 and IL23R genes which had previously been found to associate with immune-mediated chronic inflammatory disorders. While none of the polymorphisms were associated with NERD or ERD, the 1142G/A variant of the IL23R gene was found to be a risk variant in Barrett's esophagus patients. The IL23/IL23R pathway may modulate STAT3 transcriptional activity which is an essential regulator not only of immune-mediated inflammation, but also of inflammatory-associated apoptosis resistance. Although the mechanisms of metaplastic transition of inflamed squamous epithelium are undetermined as yet, our findings suggest potential involvement of alternations in the IL23/IL23R pathway as a molecular background of Barrett's esophagus development.
    Źródło:
    Acta Biochimica Polonica; 2008, 55, 2; 365-369
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A common cis-element in promoters of protein synthesis and cell cycle genes
    Autorzy:
    Wyrwicz, Lucjan
    Gaj, Paweł
    Hoffmann, Marcin
    Rychlewski, Leszek
    Ostrowski, Jerzy
    Powiązania:
    https://bibliotekanauki.pl/articles/1041116.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    gel shift assay
    regulation of transcription
    comparative genomics
    gene expression
    promoter
    bioinformatics
    Opis:
    Gene promoters contain several classes of functional sequence elements (cis elements) recognized by protein agents, e.g. transcription factors and essential components of the transcription machinery. Here we describe a common DNA regulatory element (tandem TCTCGCGAGA motif) of human TATA-less promoters. A combination of bioinformatic and experimental methodology suggests that the element can be critical for expression of genes involved in enhanced protein synthesis and the G1/S transition in the cell cycle. The motif was identified in a substantial fraction of promoters of cell cycle genes, like cyclins (CCNC, CCNG1), as well as transcription regulators (TAF7, TAF13, KLF7, NCOA2), chromatin structure modulators (HDAC2, TAF6L), translation initiation factors (EIF5, EIF2S1, EIF4G2, EIF3S8, EIF4) and previously reported 18 ribosomal protein genes. Since the motif can define a subset of promoters with a distinct mechanism of activation involved in regulation of expression of about 5% of human genes, further investigation of this regulatory element is an emerging task.
    Źródło:
    Acta Biochimica Polonica; 2007, 54, 1; 89-98
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mitochondria-associated satellite I RNA binds to hnRNP K protein
    Autorzy:
    Klimek-Tomczak, Karolina
    Mikula, Michał
    Dzwonek, Artur
    Paziewska, Agnieszka
    Wyrwicz, Lucjan
    Hennig, Ewa
    Ostrowski, Jerzy
    Powiązania:
    https://bibliotekanauki.pl/articles/1041284.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    hnRNP K protein
    SAGE
    mitochondria
    satellite I RNA
    Opis:
    hnRNP K protein, which localizes to the nucleus, cytoplasm and mitochondria, is involved in the various cellular processes that compose gene expression. We used a SAGE-based assay to profile RNAs associated with hnRNP K protein in rat mitochondria. RNA was isolated from mitoplasts obtained from highly purified and RNase-treated mitochondria. Total RNA and RNA associated with hnRNP K protein were then used as input material for generating two SAGE libraries. Mitochondrion-derived tags isolated from the total mitoplast RNA library represented 86.3%, while those isolated from the library constructed from RNA associated with hnRNP K protein represented only 28.2% of selected tags. Thus, an unexpected number of nuclear-encoded RNAs were purified from mitochondria. Many of these transcripts were co-purified with hnRNP K protein, and high levels of nuclear-encoded RNAs co-immunoprecipitating with K protein corresponded to elevated hnRNP K protein levels of the organelle. The most abundant RNAs that were co-purified with hnRNP K protein represented transcripts originating from satellite I DNA. While satellite I RNA levels were higher in the nucleus and cytoplasm than in mitochondria, the most abundant binding of satellite I transcripts to hnRNP K protein was found in mitochondria. The role of satellite I RNA in mitochondria remains to be elucidated.
    Źródło:
    Acta Biochimica Polonica; 2006, 53, 1; 169-178
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gene expression alterations induced by low molecular weight heparin during bowel anastomosis healing in rats
    Autorzy:
    Krześniak, Natalia
    Paziewska, Agnieszka
    Rubel, Tymon
    Skrzypczak, Magdalena
    Mikula, Michał
    Dzwonek, Artur
    Goryca, Krzysztof
    Wyrwicz, Lucjan
    Jarosz, Dorota
    Laubitz, Daniel
    Woszczyński, Marek
    Bielecki, Krzysztof
    Ostrowski, Jerzy
    Powiązania:
    https://bibliotekanauki.pl/articles/1039955.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    heparins
    gene expression
    wound healing
    microarrays
    Opis:
    Colon anastomosis is therapeutically challenging because multiple, usually undetectable factors influence a spectrum of repair mechanisms. We hypothesized that low molecular weight heparins, routinely administered perioperatively, may differentially affect gene expression related to colon healing. Twenty pairs of untreated and enoxaparin-treated rats underwent left-side hemicolectomy with a primary end-to-end anastomosis. Normal colon and anastomotic bowel segments were resected on day 0 and on days 1, 3, 5, and 7 after surgery, respectively. Serial anastomosis transverse cross-sections were evaluated microscopically and by microarray (Rat Genome 230 2.0, Affymetrix). Differentially expressed probe sets were annotated with Gene Ontology. We also examined the influence of enoxaparin on fibroblast proliferation and viability in vitro. Among the 5476 probe sets, we identified differential expression at each healing time point, yielding 79 subcategories. Most indicated genes were involved in wound healing, including multicellular organismal development, locomotory behavior, immune response, cell adhesion, inflammatory response, cell-cell signaling, blood vessel development, and tissue remodeling. Although we found no intensity differences in histological features of healing between enoxaparin-treated and control rats, treatment did induce significant expression changes during early healing. Of these changes, 83 probe sets exhibited at least twofold changes and represented different functional annotations, including inflammatory response, regulation of transcription, regulation of apoptosis, and angiogenesis. Fibroblast culture confirmed an anti-viability effect of enoxaparin. Enoxaparin affects colon wound-related gene expression profiles, but further studies will resolve whether heparin treatment is a risk factor after intestinal surgery, at least in some patients.
    Źródło:
    Acta Biochimica Polonica; 2011, 58, 1; 79-87
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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