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Wyszukujesz frazę "Bielawski, Krzysztof" wg kryterium: Autor


Tytuł:
Construction of a DNA-polymerase I overproducing plasmid and isolation of the enzyme
Autorzy:
Bielawski, Krzysztof
Skowron, Piotr
Kur, Józef
Konopa, Grażyna
Podhajska, Anna
Taylor, Karol
Powiązania:
https://bibliotekanauki.pl/articles/1045939.pdf
Data publikacji:
1987
Wydawca:
Polskie Towarzystwo Biochemiczne
Źródło:
Acta Biochimica Polonica; 1987, 34, 1; 29-34
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthetic analogues of netropsin and distamycin - synthesis of a new pyridine and carbocyclic analogues of the pyrrolecarboxamide antitumour antibiotics
Autorzy:
Bartulewicz, Danuta
Bielawski, Krzysztof
Markowska, Agnieszka
Zwierz, Krzysztof
Pućkowska, Anna
Różański, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1044852.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Biochemiczne
Źródło:
Acta Biochimica Polonica; 1998, 45, 1; 41-57
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
c-myc Oncogene gene dosage, serum CEA and CA-15.3 antigen levels, and cellular DNA values in relation to ex vivo chemosensitivity of primary human breast cancer.
Autorzy:
Falkiewicz, Bogdan
Schlotter, Claus
Bosse, Ulrich
Bielawski, Krzysztof
Vogt, Ulf
Powiązania:
https://bibliotekanauki.pl/articles/1044409.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
cultured tumor cells
antitumor drug screening assays
oncogenes
antineoplastic agents
drug resistance
breast cancer
Opis:
A pilot study on relationships of selected molecular factors (c-myc oncogene average gene copy numbers (AGCN); serum CEA and CA 15.3 antigen levels; tumor cells' DNA values), to the ex vivo chemosensitivity of primary female human breast cancer in a modified adenosine triphosphate cell viability chemosensitivity assay (ATP-CVA), was performed. Four drug combinations were tested. A group of 75 cases of female primary breast cancer was assessed. Numerous correlations were found among molecular factors tested but none, with the exception of tumor grading, of these reflected ex vivo chemosensitivity of tumors tested. The results suggest that the parameters tested may not be important factors related to adjuvant chemoresponsiveness of primary human breast cancer to tested drug combinations.
Źródło:
Acta Biochimica Polonica; 2000, 47, 1; 149-156
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inhibitory effects of pentamidine analogues on protein biosynthesis in vitro.
Autorzy:
Bielawski, Krzysztof
Galicka, Anna
Bielawska, Anna
Średzińska, Krystyna
Powiązania:
https://bibliotekanauki.pl/articles/1044401.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
amidine
elongation factors
protein synthesis in vitro
DAPI
Opis:
Pentamidine despite its rather high toxicity, is currently in clinical use. For development of new drugs of this type it is important to know the mechanism of their action. Two new amidines (I and II) and 4',6-diamidino-2-phenylindole (DAPI) were found in preliminary experiments to inhibit protein synthesis in vitro in the cell-free rat liver system. The three compounds differed in the precise mode of action. The inhibitory effect of I on the activity of the eukaryotic elongation factor eEF-2 and ribosomes seems to suggest that the binding site of eEF-2 on the ribosome was blocked by this compound. eEF-2 has been identified as the primary target of II and eEF-1 as the primary target of DAPI in the system studied.
Źródło:
Acta Biochimica Polonica; 2000, 47, 1; 113-120
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molecular modelling of the interaction of carbocyclic analogues of netropsin and distamycin with d(CGCGAATTCGCG)2.
Autorzy:
Bielawski, Krzysztof
Bielawska, Anna
Bartulewicz, Danuta
Różański, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1044344.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
carbocyclic analogues of netropsin and distamycin
distamycin
DNA-ligand interaction
netropsin
molecular modelling
Opis:
A molecular mechanics and molecular dynamics approach was used to examine the structure of complexes formed between the d(CGCGAATTCGCG)2 duplex and netropsin, distamycin, and four carbocyclic analogues of netropsin and distamycin (1-4). The resulting structures of the ligand-DNA model complexes and their energetics were examined. It is predicted that the compounds 1-4 should have a decreased affinity for the minor groove of AT-rich regions in comparison to netropsin and distamycin. From the energetic analysis it appears that van der Waals and electrostatic interactions are more important than specific hydrogen bonds in stabilizing the ligand-duplex complexes. We predict that compounds 1 and 2 are effectively isohelical with the DNA minor groove. The superior DNA-binding afforded by 1 and 2 in comparison to 3 and 4 results from their more effective penetration into the minor groove and smaller perturbation of molecular structure upon complex formation.
Źródło:
Acta Biochimica Polonica; 2000, 47, 3; 855-866
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationship of c-myc and erbB oncogene family gene aberrations and other selected factors to ex vivo chemosensitivity of ovarian cancer in the modified ATP-chemosensitivity assay.
Autorzy:
Vogt, Ulf
Falkiewicz, Bogdan
Bielawski, Krzysztof
Bosse, Ulrich
Schlotter, Claus
Powiązania:
https://bibliotekanauki.pl/articles/1044426.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
cultured tumor cells
antitumor drug screening assays
oncogenes
ovarian cancer
antineoplastic agents
Opis:
A pilot study on relationships of selected molecular factors [erbB-1, erbB-2, erbB-3, and c-myc oncogene average gene copy numbers (AGCN); steroid receptors and pS2 gene expression; tumor cells' DNA values] to the ex vivo chemosensitivity of ovarian cancer in a modified adenosine triphosphate cell viability chemosensitivity assay (ATP-CVA), was performed. Despite the relatively small number of patients, numerous correlations among the factors tested were found. Nevertheless, only c-myc gene dosage positively affected ex vivo chemosensitivity of tumors tested.
Źródło:
Acta Biochimica Polonica; 2000, 47, 1; 157-164
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New carbocyclic analogues of netropsin: Synthesis and inhibition of topoisomerases.
Autorzy:
Pućkowska, Anna
Bielawski, Krzysztof
Bielawska, Anna
Róański, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1043824.pdf
Data publikacji:
2002
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
topoisomerase inhibition
DNA interaction
lexitropsin
carbocyclic analogues of netropsin
Opis:
A series of carbocyclic analogues of netropsin were synthesized and evaluated for their capacity to inhibit human topoisomerases I and II in vitro. The compounds are oligopeptides containing 1,4-di- and 1,2,5-trisubstituted benzene rings and unsubstituted N-terminal NH2 groups. Compounds 4-7 consist of two netropsin-like units linked by aliphatic (tetra- and hexamethylene) chains. In the topoisomerase I and II assay, the relaxation of pBR322 plasmid was inhibited by compounds 4-7 at 100 μM concentration.
Źródło:
Acta Biochimica Polonica; 2002, 49, 1; 177-183
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nowe rozwiązania technologiczne dla Sił Zbrojnych RP
Autorzy:
Bielawski, Krzysztof.
Banacki, Andrzej.
Chmieliński, Mirosław.
Tamberg, Sławomir.
Powiązania:
Zeszyty Naukowe Akademia Marynarki Wojennej im. Bohaterów Westerplatte, 2008, nr 172 B, s. 241-252
Data publikacji:
2008
Tematy:
Zakład Automatyki i Urządzeń Pomiarowych AREX Sp. z o. o. (Gdańsk, woj. pomorskie) przemysł
Współpraca naukowo-techniczna
Obrona przeciwlotnicza uzbrojenie modernizacja
Opis:
Fot., rys.; Bibliogr.; Abstr., streszcz.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Photodynamic effect of lanthanide derivatives of meso-tetra(N-methyl-4-pyridyl)porphine against Staphylococcus aureus
Autorzy:
Jurczak, Agata
Szramka, Bozena
Grinholc, Mariusz
Legendziewicz, Janina
Bielawski, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1040720.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
photosensitizer
porphyrin
photodynamic therapy
MRSA
Opis:
Photodynamic therapy (PDT), used for cancer treatment, is also an alternative method for eradication of drug-resistant bacteria. This method utilizes a nontoxic light-activated dye, called a photosensitizer, and visible light to produce reactive oxygen species that lead to bacterial cell death. The purpose of this study was to investigate the bactericidal effect of PDT using lanthanide derivatives of meso-tetra(N-methyl-4-pyridyl)porphine against Staphylococcus aureus strains. The new photosensitizers appeared to be photodynamically ineffective. No enhancement of antistaphylococcal activity of TMPyP was observed after the conjugation of the porphyrin with lanthanide ions. Additionally, a significant difference in the susceptibility of two bacterial strains to unmodified TMPyP was observed.
Źródło:
Acta Biochimica Polonica; 2008, 55, 3; 581-585
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Photodynamic effect of protoporphyrin diarginate (PPArg2) on methicillin-resistant Staphylococcus aureus and human dermal fibroblasts
Autorzy:
Grinholc, Mariusz
Kawiak, Anna
Kurlenda, Julianna
Graczyk, Alfreda
Bielawski, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1040819.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
cytotoxicity
antimicrobial photodynamic inactivation
MRSA
fibroblasts
phototoxicity
Opis:
The worldwide rise in the antibiotic resistance of bacteria forces the development of alternative antimicrobial treatments. A potential approach is photodynamic inactivation (PDI). The aim of the present study was to determine the phototoxicity of protoporphyrin diarginate (PPArg2) against methicillin-resistant Staphylococcus aureus and human dermal fibroblasts. Different concentrations (0 to 20 µM) of PPArg2 and light dose of 6 J cm-2 were tested. Cell viability was evaluated using the methylthiazoletetrazolium (MTT) assay. Incubation with 10 µM followed by illumination yielded a 3.6 log10-unit reduction in the viable count for Staphylococcus aureus. At the same experimental conditions, only 22.5% of the fibroblasts were photoinactivated. Protoporphyrin diarginate at concentrations up to 20 µM demonstrated no toxicity towards S. aureus or fibroblasts when not irradiated. These results suggest that the protoporphyrin diarginate exerts a high bactericidal effect against methicillin-resistant S. aureus strain without harming eukaryotic cells.
Źródło:
Acta Biochimica Polonica; 2008, 55, 1; 85-90
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł

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