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Wyświetlanie 1-8 z 8
Tytuł:
GATA-1 binding to the αV promoter negatively regulates expression of the integrin αV subunit in human leukemic K562 cells.
Autorzy:
Czyż, Małgorzata
Stasiak, Marta
Boncela, Joanna
Cierniewski, Czesław
Powiązania:
https://bibliotekanauki.pl/articles/1043802.pdf
Data publikacji:
2002
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
αvβreceptors
transcription regulation
integrins
gene expression
Opis:
Recently we observed that the transcription factors Sp1 and Sp3 bind to the CTCCTCCTC sequence located between positions -194 and -172 of the αV promoter region and are directly involved in the regulation of transcriptional activity of the αV gene in human umbilical vascular endothelial cells (HUVECs) (Czyz & Cierniewski, 1999, Eur. J. Biochem. 265, 638). In this report we provide evidence that the GATA-1 factor regulates αV expression during differentiation of pluripotent K562 cells induced either by phorbol 12-myristate 13-acetate (PMA) or butyric acid (BA) through interaction with the GATA element in the αV gene promoter. DNase I footprinting analysis revealed that region -413 to -408, covering the GATA binding site, was protected by nuclear extract from K562 cells. There was no protection of this region by HUVEC nuclear extract. Electrophoretic mobility shift assay (EMSA) analysis of nuclear extract of K562 cells treated with BA revealed an increase in GATA binding activity, which was associated with reduced αV mRNA and αV protein on the cell surface. Stimulation of K562 cells with PMA resulted in opposite effects: lower expression of GATA-1 was associated with increased levels of αV. We conclude that the GATA-1 transcription factor specifically binds to the GATA element in the αV gene promoter and negatively regulates αV gene expression.
Źródło:
Acta Biochimica Polonica; 2002, 49, 1; 19-28
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inhibition of RNA synthesis in vitro by 9-aminoacridine carboxamide antitumor agents. Effects on overall RNA synthesis and synthesis of the initiating dinucleotide
Autorzy:
Piestrzeniewicz, Mariola
Czyż, Małgorzata
Denny, William
Gniazdowski, Marek
Powiązania:
https://bibliotekanauki.pl/articles/1045776.pdf
Data publikacji:
1990
Wydawca:
Polskie Towarzystwo Biochemiczne
Źródło:
Acta Biochimica Polonica; 1990, 37, 2; 299-307
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Combined effects of doxorubicin and STI571 on growth, differentiation and apoptosis of CML cell line K562
Autorzy:
Jakubowska, Justyna
Stasiak, Marta
Szulawska, Agata
Bednarek, Andrzej
Czyz, Malgorzata
Powiązania:
https://bibliotekanauki.pl/articles/1040880.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
STI571
doxorubicin
anticancer drugs
K562 cells
apoptosis
differentiation
Opis:
STI571 (imatinib mesylate; Gleevec®) is an inhibitor that targets the tyrosine kinase activity of Bcr-Abl present in chronic myelogenous leukemia (CML) cells. Some preclinical studies have demonstrated that the combination of STI571 with chemotherapeutic drugs results in enhanced toxicity in Bcr-Abl-positive leukemias. We investigated the potential benefit of using STI571 to down-regulate Bcr-Abl activity for the enhancement of doxorubicin anti-proliferative action in K562 cell line derived from blast crisis of CML. At low concentrations of both drugs (40 nM doxorubicin combined with STI571 in the range of 100-150 nM), the antiproliferative effects were mainly due to cellular differentiation as assessed by benzidine staining for hemoglobin synthesis level and real-time PCR for γ-globin expression. Higher concentrations of STI571 used in combinations with doxorubicin caused mainly apoptosis as shown by DNA degradation and nuclear fragmentation visualized by fluorescence microscopy after DAPI staining, changes in cell morphology observed after Giemza-May Grünwald staining and cellular membrane organization estimated by flow cytometry after Annexin V staining. As compared with either drug alone, cotreatment with STI571 and DOX induced stronger cellular responses. A low concentration of STI571 in combination with a low concentration of DOX might be tested as an alternative approach to increasing the efficacy of chemotherapy against CML.
Źródło:
Acta Biochimica Polonica; 2007, 54, 4; 839-846
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Covalent binding of nitroacrine (ledakrin, C-283) to nucleic acids and proteins
Wiązanie kowalencyjne nitrakryny (ledakrin, C-283) z kwasami nukleinowymi i białkami
Autorzy:
Czyż, Małgorzata
Studzian, Kazimierz
Wasilewski, Andrzej
Poziomska, Aleksandra
Wilmańska, Dorota
Gniazdowski, Marek
Powiązania:
https://bibliotekanauki.pl/articles/944989.pdf
Data publikacji:
1988
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Opis:
W obecności związków sulfhydrylowych lek przeciwnowotworowy nitrakryna (Ledakrin, C-283) tworzy nieodwracalne kompleksy z DNA i RNA. Przedstawiono charakterystyką stabilności kompleksów w różnych warunkach.
Źródło:
Acta Universitatis Lodziensis. Folia Biochimica et Biophysica; 1988, 6
0208-614X
Pojawia się w:
Acta Universitatis Lodziensis. Folia Biochimica et Biophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of glucose and deoxyglucose on cytoplasmic concentration of free Ca^2+ in Ehrlich ascites tumour: studies on single cells
Autorzy:
Czyż, Aneta
Teplova, Vera
Sabała, Paweł
Czarny, Małgorzata
Evtodienko, Yuri
Wojtczak, Lech
Powiązania:
https://bibliotekanauki.pl/articles/1045447.pdf
Data publikacji:
1993
Wydawca:
Polskie Towarzystwo Biochemiczne
Źródło:
Acta Biochimica Polonica; 1993, 40, 4; 539-544
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inulin supplementation in rat model of pouchitis
Autorzy:
Drzymała-Czyż, Sławomira
Banasiewicz, Tomasz
Tubacka, Małgorzata
Majewski, Przemysław
Biczysko, Maciej
Kościński, Tomasz
Drews, Michał
Walkowiak, Jarosław
Powiązania:
https://bibliotekanauki.pl/articles/1039892.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
rats
pouchitis
inulin
restorative proctocolectomy
Opis:
Available data indicates potential effectiveness of prebiotic therapy in alleviating inflammation and prolonging the remission in inflammatory bowel disease. Documented successes of such therapies were the basis for this study. So far, there is no data related to the effectiveness of inulin application in symptomatic or severe pouchitis in humans or in animal model. The aim of the study was to determine the effect of inulin supplementation on the expression of intestinal inflammation and feeding efficiency in rats with induced pouchitis. Twenty-four Wistar rats were operated. After induction of pouchitis animals were randomly divided into control and supplementation groups receiving, respectively, semi-synthetic diet with or without inulin (in a lower (LD) or higher (HD) dose: 2.5 % or 5 % of total dietary content of mass) for a period of 6 weeks. Selected nutritional parameters were assessed throughout the study. Histopathological and immunohistochemical analysis of pouch mucosa specimens was also performed. The energy intake, weight gain, feeding efficiency, quality of stools were comparable in all studied groups. The intensity of inflammation (Moskovitz scale) and adaptive changes (Laumonier scale) did not differ between compared groups. The tissue expression of pro- and anti-inflammatory interleukins (IL-1α, IL-6, IL-10 and IL-12) was not different either. Inulin supplementation does not improve the quality of stools or the expression of intestinal inflammation in rats with induced pouchitis. It has no impact on the intensity of pouch adaptation or on feeding efficiency.
Źródło:
Acta Biochimica Polonica; 2011, 58, 3; 381-384
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

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