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    Wyświetlanie 1-4 z 4
    Tytuł:
    Specific binding sites for progesterone and 17β-estradiol in cells of Triticum aestivum L.
    Autorzy:
    Janeczko, Anna
    Budziszewska, Bogusława
    Skoczowski, Andrzej
    Dybała, Małgorzata
    Powiązania:
    https://bibliotekanauki.pl/articles/1040676.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    vernalization
    progesterone
    radioligand binding assay
    Triticum aestivum L.
    17β-estradiol
    Opis:
    The presence and location of specific binding sites for progesterone and 17β-estradiol in cells of wheat were estimated using radioligand binding assay. Membrane and cytosolic fractions of non-vernalized and vernalized plants were tested using tritium-labelled ligands. Specific binding of [3H]progesterone and [3H]17β-estradiol occurs in wheat cells. The binding sites are located in membranes and in the cytosol. Specific binding of [3H]17β-estradiol is higher in the membranes than in the cytosol. Specific binding of both ligands in the cytosolic fraction is higher in vernalized plants than in non-vernalized ones. The possibility of the occurrence of steroid binding proteins specific for progesterone and 17β-estradiol, putative steroid receptors for these steroids in Triticum aestivum L., is discussed.
    Źródło:
    Acta Biochimica Polonica; 2008, 55, 4; 707-711
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in expression of serine proteases HtrA1 and HtrA2 during estrogen-induced oxidative stress and nephrocarcinogenesis in male Syrian hamster
    Autorzy:
    Zurawa-Janicka, Dorota
    Kobiela, Jaroslaw
    Stefaniak, Tomasz
    Wozniak, Agnieszka
    Narkiewicz, Joanna
    Wozniak, Michał
    Limon, Janusz
    Lipinska, Barbara
    Powiązania:
    https://bibliotekanauki.pl/articles/1040768.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    17-β-estradiol
    HtrA proteases
    estrogen-induced carcinogenesis
    oxidative stress
    Opis:
    Serine proteases HtrA1 and HtrA2 are involved in cellular stress response and development of several diseases, including cancer. Our aim was to examine the involvement of the HtrA proteins in acute oxidative stress response induced in hamster kidney by estrogen treatment, and in nephrocarcinogenesis caused by prolonged estrogenization of male Syrian hamster. We used semi-quantitative RT-PCR to estimate the HtrA1 and HtrA2 mRNA levels in kidney tissues, and Western blotting to monitor the amount of the HtrA proteins. Within the first five hours following estrogen administration both HtrA1 mRNA and the protein levels were increased significantly. No changes in the expression of HtrA2 were observed. This indicates that HtrA1 may be involved in the response against oxidative stress induced by estrogen treatment in hamster kidney. During prolonged estrogenization, a significant reduction of the HtrA1 mRNA and protein levels was observed after 6 months of estradiol treatment, while the expression of HtrA2 was significantly elevated starting from the third month. This suggests an involvement of the HtrA proteins in estrogen-induced nephrocarcinogenesis in hamster. Using fluorescence in situ hybridization we localized the HtrA1 gene at the qb3-4 region of Syrian hamster chromosome 2, the region known to undergo a nonrandom deletion upon prolonged estrogenization. It is possible that the reduced level of HtrA1 expression is due to this chromosomal aberration. A full-length cDNA sequence of the hamster HtrA1 gene was obtained. It codes for a 50 kDa protein which has 98 and 96% identity with mouse and human counterparts, respectively.
    Źródło:
    Acta Biochimica Polonica; 2008, 55, 1; 9-20
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modulation of hepatic chromatin structure in response to 17-β estradiol induced of the vitellogenin gene regions in Atlantic salmon, Saimo salar
    Autorzy:
    von der Decken, Alexandra
    Waters, Sean
    Powiązania:
    https://bibliotekanauki.pl/articles/1045494.pdf
    Data publikacji:
    1993
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Źródło:
    Acta Biochimica Polonica; 1993, 40, 1; 23-28
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The level of endogenous DNA damage in lymphocytes isolated from blood is associated with the fluctuation of 17β-estradiol concentration in the follicular phase of healthy young women.
    Autorzy:
    Kapiszewska, Maria
    Kalemba, Malgorzata
    Grzesiak, Aneta
    Kocemba, Kinga
    Powiązania:
    https://bibliotekanauki.pl/articles/1041444.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    endogenous DNA damage
    catechol-O-methyltransferase (COMT)
    comet assay
    17β-estradiol
    Opis:
    The aim of this study was to evaluate whether the differences in plasma 17β-estradiol concentration in early and late follicular phases of the menstrual cycle can affect the level of endogenous DNA damage in lymphocytes assessed by comet assay, and whether the extent of this damage in the follicular phase is associated with the genotype of catechol-O-methyltransferase (COMT). The level of DNA damage was positively correlated with 17β-estradiol concentration only in the late follicular phase. Subjects with the COMT L/L homozygous mutated variant revealed more DNA damage as compared to individuals with the COMT wild-type and heterozygous (H/L+HH) genotype.
    Źródło:
    Acta Biochimica Polonica; 2005, 52, 2; 535-539
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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