105 research outputs found

    Regulation of protein synthesis at the translational level in neuroblastoma cells.

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    ESTABLISHMENT OF FUNCTIONAL CLONAL LINES OF NEURONS FROM MOUSE NEUROBLASTOMA

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    Phosphodiesterase specific inhibitors control cell growth of a human neuroepithelioma cell line

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    The effects of cyclic nucleotide phosphodiesterase (PDE) inhibitors on cell proliferation of SK-N-MC human neuroepithelioma cell line was studied. Clonal density experiments in the presence of 100 microM rolipram and zaprinast showed respectively 27% and 91% inhibition. The effects of PDE inhibitors were then investigated on crude cell extracts; the calculated IC50 were 32 microM for zaprinast and 16 nM for DC-TA-46; the latter inhibitor was used instead of rolipram for its higher efficacy. Dose-response experiments in clonal density conditions showed IC50 of 5 microM and 1.8 microM in the presence respectively of zaprinast and rolipram. These data show that both inhibitors are effective in reducing cell growth, although the response was quantitatively different

    Introduzione a Biologia dello Sviluppo. Principi generali dello Sviluppo.

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    Con il termine “sviluppo” ci riferiamo fondamentalmente all’insieme degli eventi attraverso cui da un uovo fecondato si genera un organismo pluricellulare, composto da differenti tipi cellulari, organizzati in tessuti ed organi, ciascuno deputato a svolgere una specifica funzione (di sostegno, di protezione, di nutrizione, di locomozione, sensoriale, riproduttiva, ecc.) e con una sua ben precisa forma tridimensionale e localizzazione spaziale rispetto alle altre strutture che compongono l’organismo
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