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Involvement of Intracellular Ca2+in the Regulation of Bovine Leukemia Virus Expression

  • Angelika Bondzio , Anita Abraham-Podgornik , Petra Blankenstein and Siegfried Risse
Published/Copyright: June 1, 2005
Biological Chemistry
From the journal Volume 382 Issue 3

Abstract

The calcium ionophore A23187, which was used to i n c rease the intracellular calcium concentration ([Ca[2+]]), was analyzed for effects on bovine leukemia virus (BLV) expression in two BLV infected cell lines. To clarify the role of intracellular free calcium in this response, [Ca[2+]] was measured during ionophore treatment with the fluorescent calcium indicator Fura-2. Elevation of intracellular calcium under these conditions caused an enhancement of BLV gp51 and p24 synthesis as well as an activation of the BLV long terminal repeat (LTR) in a dosedependent manner. Furthermore, it was observed that elevated levels of intracellular calcium following A23187 stimulation lead to activation of NFκB . Based on inhibitor studies, we hypothesize that the effect of A23187 on BLV expression appears to be mediated by PKC.

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Published Online: 2005-06-01
Published in Print: 2001-03-21

Copyright © 2001 by Walter de Gruyter GmbH & Co. KG

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