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Tytuł oryginału: Temperature-sensitive ovarian carcinoma cell line (OvBH-1).
Autorzy: Bar Julia K., Harłozińska Antonina, Kartarius Sabine, Montenarh Mathias, Wyrodek Ewa, Parkitna Rodriquez Jan M., Kochman Marian, Ożyhar Andrzej
Źródło: Jpn. J. Cancer Res. 2002: 93 (9) s.976-985, il., bibliogr. 65 poz.
Sygnatura GBL: 301,570

Hasła klasyfikacyjne GBL:
  • ginekologia i położnictwo
  • onkologia

    Typ dokumentu:
  • praca kazuistyczna
  • praca opublikowana za granicą
  • tytuł obcojęzyczny

    Wskaźnik treści:
  • ludzie
  • in vitro

    Streszczenie angielskie: OvBH-1 cells from a patient with ovarian clear cell carcinoma were established and their biochemical status was analyzed. Cells grown at 37řC exhibited normal cell cycle distribution, whereas the cells shifted to 31řC were arrested in the G2/M phase of the cell cycle. Immunochemical analysis using anti-p53 antibodies (DO-1, PAb240, PAb421, and PAb1620) revealed that only the DO-1 antibody reacted with p53 with a high and similar percentage at both temperatures. PAb240 reacted with a low percentage of cells at 37řC and no reaction was observed at 31řC. PAb421 antibody stained a significantly lower percentage of cells at 37řC than at 31řC. Cells were not stained with PAb1620 antibody and were negative for antibodies against p21**WAF1 and MDM2 proteins independently of the temperature. Sequencing of all coding exons of the p53 gene demonstrated only a neutral genetic polymorphism, i.e. a G-to-A substitution (GAG to GAA) at nucleotide position 13 432. Thus, the observed temperature sensitivity of OvBH-1 cells cannot be ascribed to a p53 primary structure mutation. Based upon immunochemical analyses, we consider, however, that p53 in nuclei of OvBH-1 cells is in a highly unstable conformation. Furthermore, the N-terminal portion of the p53 protein at Ser20 has not been modified, and Lys373 and/or Ser 378 of the C-terminus is acetylated and/or phosphorylated. The nuclear location signal of p53 is preserved. Induction of MDM2 protein is uncoupled from the cell regulatory machinery and the induction of p21**WAF1 by p53 is impaired in OvBH-1 cells.

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