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Initiation factor eIF2B not p70 S6 kinase is involved in the activation of the PI-3K signalling pathway induced by the v=src oncogene

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378050%3A_____%2F03%3A00191549" target="_blank" >RIV/68378050:_____/03:00191549 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Initiation factor eIF2B not p70 S6 kinase is involved in the activation of the PI-3K signalling pathway induced by the v=src oncogene

  • Original language description

    Our data show that in hamster fibroblasts transformed by Rous sarcoma virus (RSV), the phosphoinositide 3'-kinase (PI-3K)/Akt/glycogen synthase kinase 3 antiapoptotic pathway is upregulated and involved in increased protein synthesis through activation of initiation factor eIF2B. Upon inhibition of PI-3K by wortmannin, phosphorylation of 70-kDa ribosomal protein S6 kinase (p70 S6k) and its physiological substrate, ribosomal protein S6, decreased in the non-transformed cells but not in RSV-transformed cells. Thus PI-3K, which is thought to be involved in regulation of p70 S6k, signals to p70 S6k in normal fibroblasts, but it does not appear to be an upstream effector of p70 S6k in fibroblasts transformed by v-src oncogene, suggesting that changes in thePI-3K signalling pathway upstream of p70 S6k are induced by RSV transformation.

  • Czech name

    Na aktivaci signální dráhy PI-3K vyvolané onkogenem v-src se podílí iniciační faktor eIF2B, ale ne kináza p70 S6

  • Czech description

    Naše výsledky ukazují, že v křeččích fibroblastech transformovaných RSV je antiapoptotická dráha PI-3K/Akt/glykogen-synthasa-kinasa 3 zesílena a zvyšuje proteosyntézu aktivací iniciačního faktoru eIF2B. Po inhibici PI-3K wortmanninem se snižuje fosforylace p70 S6k a jeho fyziologického substrátu, ribosomálního proteinu S6 pouze v netransformovaných buňkách. Znamená to, že PI-3K, která normálně zprostředkuje regulaci p70 S6k, ve fibroblastech transformovaných onkogenem v-src signál na p70 S6k nepřenáší.RSV tedy narušuje signální dráhu PI-3K předcházející p70 S6k.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CE - Biochemistry

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2003

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    FEBS Letters

  • ISSN

    0014-5793

  • e-ISSN

  • Volume of the periodical

    543

  • Issue of the periodical within the volume

    1-3

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    6

  • Pages from-to

    81-86

  • UT code for WoS article

  • EID of the result in the Scopus database