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Wyświetlanie 1-9 z 9
Tytuł:
Investigation of DNA structures with scanning tunneling microscope
Autorzy:
Oliński, Ryszard
Zastawny, Tomasz
Olejniczak, Wielisław
Wojczuk, Sławomir
Chwiałkowski, Marek
Powiązania:
https://bibliotekanauki.pl/articles/1045585.pdf
Data publikacji:
1992
Wydawca:
Polskie Towarzystwo Biochemiczne
Źródło:
Acta Biochimica Polonica; 1992, 39, 1; 15-19
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coma in the course of severe poisoning after consumption of red fly agaric (Amanita muscaria)
Autorzy:
Mikaszewska-Sokolewicz, Małgorzata
Pankowska, Sylwestra
Janiak, Marek
Pruszczyk, Piotr
Łazowski, Tomasz
Jankowski, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1038865.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
Amanita muscaria
hallucinogenic mushroom
coma
ibotenic acid
muscimol
muscasone
Opis:
Red fly agaric poisoning is rare. It can be consumed for suicidal purposes or its psychedelic effect. The paper describes the case of a young men, who fell into a coma after ingestion of the red toadstools. Quick identification of the poison, early use of gastric lavage and symptomatic treatment resulted in regression of symptoms and lead to the patient's discharge from the hospital on the third day after intoxication. Authors discussing the poisonous alkaloids contained in the red toadtools: ibotenic acid, muscimol, muscasone and muscarine and theirs properties, responsible for the symptoms of intoxication.
Źródło:
Acta Biochimica Polonica; 2016, 63, 1; 181-182
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oxidative damage to DNA and antioxidant status in aging and age-related diseases
Autorzy:
Olinski, Ryszard
Siomek, Agnieszka
Rozalski, Rafal
Gackowski, Daniel
Foksinski, Marek
Guz, Jolanta
Dziaman, Tomasz
Szpila, Anna
Tudek, Barbara
Powiązania:
https://bibliotekanauki.pl/articles/1041102.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
ROS
aging
oxidative DNA damage
age-related diseases
BER
GO system
Opis:
Aging is a complex process involving morphologic and biochemical changes in single cells and in the whole organism. One of the most popular explanations of how aging occurs at the molecular level is the oxidative stress hypothesis. Oxidative stress leads in many cases to an age-dependent increase in the cellular level of oxidatively modified macromolecules including DNA, and it is this increase which has been linked to various pathological conditions, such as aging, carcinogenesis, neurodegenerative and cardiovascular diseases. It is, however, possible that a number of short-comings associated with gaps in our knowledge may be responsible for the failure to produce definite results when applied to understanding the role of DNA damage in aging and age-related diseases.
Źródło:
Acta Biochimica Polonica; 2007, 54, 1; 11-26
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the G/C polymorphism in the 5-untranslated region of the RAD51 gene in breast cancer.
Autorzy:
Blasiak, Janusz
Przybyłowska, Karolina
Czechowska, Agnieszka
Zadrożny, Marek
Pertyński, Tomasz
Rykała, Jan
Kołacińska, Agnieszka
Morawiec, Zbigniew
Drzewoski, Józef
Powiązania:
https://bibliotekanauki.pl/articles/1043672.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
genetic polymorphism
RAD51 gene
RFLP-PCR
breast cancer
Opis:
The breast cancer suppressor proteins BRCA1 and BRCA2 interact with RAD51, a protein essential for maintaining genomic stability by playing a central role in homology-dependent recombinational repair of the DNA double-strand breaks. Therefore, genetic variability in the RAD51 gene may contribute to the appearance and/or progression of breast cancer. A single nucleotide polymorphism in the 5'- untranslated region of RAD51 (a G to C substitution at position 135, the G/C polymorphism) is reported to modulate breast cancer risk. We investigated the distribution of genotypes and frequency of alleles of the G/C polymorphism in breast cancer. Tumor tissues were obtained from postmenopausal women with node-negative and node-positive breast carcinoma with uniform tumor size. Blood samples from age matched healthy women served as control. The G/C polymorphism was determined by PCR-based MvaI restriction fragment length polymorphism. The distribution of the genotypes of the G/C polymorphism did not differ significantly (P >0.05) from those predicted by the Hardy-Weinberg distribution. There were no differences in the genotype distribution and allele frequencies between node-positive and node-negative patients. There were no significant differences between distributions of the genotypes in subgroups assigned to histological grades according to Scarf-Bloom-Richardson criteria and the distribution predicted by Hardy-Weinberg equilibrium (P >0.05). Our study implies that the G/C polymorphism of the RAD51 gene may not be directly involved in the development and/or progression of breast cancer and so it may not be useful as an independent marker in this disease.
Źródło:
Acta Biochimica Polonica; 2003, 50, 1; 249-253
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conflicting results of non-invasive methods for detection of Helicobacter pylori infection in children with celiac disease - a preliminary study
Autorzy:
Józefczuk, Jan
Mądry, Edyta
Nowak, Jan
Walkowiak, Marek
Łochocka, Klaudia
Banasiewicz, Tomasz
Pławski, Andrzej
Kwiecień, Jarosław
Walkowiak, Jarosław
Powiązania:
https://bibliotekanauki.pl/articles/1038852.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
Helicobacter pylori
celiac disease
fecal test
breath test
urea
Opis:
Background: There are no data addressing the usefulness of non-invasive tests for the detection of Helicobacter pylori (HP) infection in celiac disease (CD). Aim: The aim of this study was to compare two most sensitive and specific tests - urea breath test (UBT) and fecal antigen test (FAT) in HP diagnosis in CD patients. Materials and Methods: The study comprised of 76 CD patients, 49 healthy subjects (HS) and 35 patients who underwent differential diagnosis due to abdominal pain (AP patients). The presence of HP infection was evaluated using the 13C isotope-labeled UBT and FAT (ELISA). Results: HP infection was diagnosed based on UBT and FAT in 8 (16.3%) and 7 (14.3%) HS, and in 8 (10.5%) CD patients and 12 (34.3%) AP patients, respectively, using both tests. The prevalence of conflicting results in comparison with positive results (obtained with any of the two tests) was distinctly higher (54.5%) in CD group than in other subjects (23.3%); however, due to low HP prevalence, it did not reach the level of significance (p<0.1759). Conclusion: CD may increase the risk of divergent results of non-invasive tests used for the detection of HP infection in children. Since UBT is the most reliable test, we suggest its standard use as a method of choice in pediatric CD - at least until new evidence emerges supporting a different approach.
Źródło:
Acta Biochimica Polonica; 2016, 63, 1; 127-130
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vasostatin increases oxygenation of B16-F10 melanoma tumors and raises therapeutic efficacy of cyclophosphamide
Autorzy:
Cichoń, Tomasz
Jarosz, Magdalena
Smolarczyk, Ryszard
Ogórek, Barbara
Matuszczak, Sybilla
Wagner, Marek
Mitrus, Iwona
Sochanik, Aleksander
Jazowiecka-Rakus, Joanna
Szala, Stanisław
Powiązania:
https://bibliotekanauki.pl/articles/1039715.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
oxygenation
vasostatin
normalization of tumor blood vessels
cyclophosphamide
anticancer therapy
Opis:
One of the preconditions of effective anticancer therapy is efficient transfer of the therapeutic agent (chemotherapeutic) to tumor cells. Fundamental barriers making drug delivery and action difficult include underoxygenation, elevated interstitial pressure, poor and abnormal tumor blood vascular network and acidic tumor milieu. In this study we aimed at developing an optimized scheme of administering a combination of an angiogenesis-inhibiting drug (vasostatin) and a chemotherapeutic (cyclophosphamide) in the therapeutic treatment of mice bearing experimental B16-F10 melanoma tumors. We report that the strongest tumor growth inhibition was observed in mice that received two, three or four vasostatin doses in combination with one injection of cyclophosphamide (i.e., V2 + CTX, V3 + CTX or V4 + CTX schemes). Double administration of vasostatin increases oxygenation of B16-F10 tumors. On the other hand, its five-fold administration lowers tumor oxygenation, breaks down tumor vascular network (increasing hypoxia) and leads in consequence to death of cancer cells and appearance of necrotic areas in the tumor. A decreased cyclophosphamide dose in combination with two doses of vasostatin (V2 + CTX scheme) inhibits tumor growth similarly to a larger dose of cyclophosphamide alone.
Źródło:
Acta Biochimica Polonica; 2012, 59, 3; 377-381
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Alternative 3 acceptor site in the exon 2 of human PAX8 gene resulting in the expression of unknown mRNA variant found in thyroid hemiagenesis and some types of cancers
Autorzy:
Szczepanek-Parulska, Ewelina
Szaflarski, Witold
Piątek, Katarzyna
Budny, Bartłomiej
Jaszczyńska-Nowinka, Karolina
Biczysko, Maciej
Wierzbicki, Tomasz
Skrobisz, Jerzy
Zabel, Maciej
Ruchała, Marek
Powiązania:
https://bibliotekanauki.pl/articles/1039446.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
PAX8
thyroid hemiagenesis
splicing
cancers
Opis:
PAX8 gene encodes one of the transcription factors engaged in the regulation of proper development of thyroid gland as well as Müllerian and renal/upper urinary tracts. So far, six alternatively spliced transcripts were reported, however, sequences of only four were deposited in the NCBI database. Here, we evaluate a fragment of a novel variant of PAX8 mRNA formed by an alternative 3' acceptor site located in the second exon. The molecular outcome encompasses extension of the 5' untranslated region of exon two by 97 nucleotides as is evident from mRNA. This new insert may impair binding of mRNA to the ribosome and in consequence significantly decrease expression of the PAX8 protein. Here, we show for the first time that the novel insert in exon two might be associated with congenital thyroid hemiagenesis and influence development of different types of cancer.
Źródło:
Acta Biochimica Polonica; 2013, 60, 4; 573-578
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Clinical parameters of inflammatory bowel disease in children do not correlate with four common polymorphisms of the transforming growth factor β1 gene
Autorzy:
Liberek, Anna
Jakóbkiewicz-Banecka, Joanna
Kloska, Anna
Świderska, Joanna
Kmieć, Zbigniew
Łuczak, Grażyna
Wierzbicki, Piotr
Liberek, Tomasz
Marek, Krzysztof
Plata-Nazar, Katarzyna
Sikorska-Wiśniewska, Grażyna
Kamińska, Barbara
Węgrzyn, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/1039871.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
pediatric patients
gene polymorphism
Transforming growth factor β1
inflammatory bowel disease
Opis:
Transforming growth factor β1 (TGF-β1) is a cytokine affecting cell proliferation and development, which also has an immunomodulatory activity. Correlations between polymorphisms of the TGF-β1 gene and clinical parameters of inflammatory bowel disease (IBD) were reported previously in adults. Here, we tested whether such correlations occur in pediatric patients suffering from IBD. One hundred and four pediatric IBD patients were involved in this study. Among them, 36 were diagnosed with Crohn's Disease (CD) and 68 were diagnosed with ulcerative colitis (UC). The control group consisted of 103 children, in which IBD was excluded. TGF-β1 levels were determined in plasma and intestinal mucosa samples. The presence of the TGF β1 protein and the amount of TGF β1 mRNA were estimated in intestinal mucosa by immunohistochemistry and reverse transcription Real-Time PCR, respectively. Four common polymorphisms of the TGF-β1 gene were investigated: -800G/A, -509C/T, 869T/C and 915G/C. No significant correlation between TGF-β1 genotypes and (i) TGF-β1 levels in plasma and tissue samples, (ii) TGF-β1 gene expression efficiency in intestinal mucosa, (iii) IBD clinical parameters and (iv) inflammatory activity could be detected in children suffering from IBD. We conclude that, contrary to previous suggestions, the four common polymorphisms of the TGF-β1 gene do not influence the susceptibility to or clinical parameters of IBD in the tested population of children.
Źródło:
Acta Biochimica Polonica; 2011, 58, 4; 641-644
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of a new, simple and cost-effective diagnostic tool for genetic screening of hereditary colorectal cancer - the DNA microarray assay
Autorzy:
Stojcev, Zoran
Banasiewicz, Tomasz
Kaszuba, Michał
Sikorski, Adam
Szczepkowski, Marek
Bobkiewicz, Adam
Paszkowski, Jacek
Krokowicz, Łukasz
Biczysko, Maciej
Szmeja, Jacek
Jurkowska, Monika
Majewski, Przemysław
Mackiewicz, Andrzej
Lamperska, Katarzyna
Drews, Michał
Wojciechowicz, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/1039574.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
HNPCC
DNA microarray
colon cancer
Opis:
Detection of mutations in families with a hereditary predisposition to colon cancer gives an opportunity to precisely define the high-risk group. 36 patients operated on for colon cancer, with familiar prevalence of this malignancy, were investigated using the DNA microarrays method with the potential detection of 170 mutations in MLH1, MSH2, MSH6, CHEK2, and NOD2 genes. In microarrays analysis of DNA in 9 patients (25% of the investigated group), 6 different mutations were found. The effectiveness of genetic screening using the microarray method is comparable to the effectiveness of other, much more expensive and time-consuming methods.
Źródło:
Acta Biochimica Polonica; 2013, 60, 2; 195-198
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-9 z 9

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