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The Blocker of Prazosine Adrenoreceptors Does Not Prevent the Synchronization of Protein Synthesis Rhythm by Exogenous Gangliosides in the Culture of Hepatocytes

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Abstract

We studied the effect of the α1-adrenolytic prazosine on both dense cultures of hepatocytes, which are normally characterized by the protein synthesis rhythm, and diluted cultures, in which such a rhythm is revealed after external synchronization. Exogenous gangliosides (a fraction of the total gangliosides of the bovine brain) then synchronize the rhythm in diluted cultures; this effect is also displayed in the presence of 10–7 M prazosine. The synchronizing effect of the medium conditioned by dense cultures was also preserved in the presence of prazosine. In the dense cultures that don't normally require external synchronization, prazosine intensified the rhythmic pattern of changes in the protein synthesis. After a total of 0.3 μM gangliosides were introduced in the medium with prazosine-pretreated dense cultures, the protein synthesis rhythm was visualized. We propose that, while blocking adrenoreceptors, prazosine does not prevent the action of exogenous synchronizing factors on the hepatocytes, but inhibits the release of such factors from the cell.

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  1. Kol'tsov Institute of Developmental Biology, Russian Academy of Sciences, ul. Vavilova 26, Moscow, 117808, Russia

    V. Ya. Brodsky, N. D. Zvesdina, N. V. Nechaeva, T. E. Novikova, I. G. Gvazava & V. I. Fateeva

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  1. V. Ya. Brodsky
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  2. N. D. Zvesdina
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  3. N. V. Nechaeva
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  4. T. E. Novikova
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  5. I. G. Gvazava
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  6. V. I. Fateeva
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Brodsky, V.Y., Zvesdina, N.D., Nechaeva, N.V. et al. The Blocker of Prazosine Adrenoreceptors Does Not Prevent the Synchronization of Protein Synthesis Rhythm by Exogenous Gangliosides in the Culture of Hepatocytes. Biology Bulletin 28, 1–6 (2001). https://doi.org/10.1023/A:1026629918549

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