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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Translocation and activation of protein kinase C by the plasma cell tumor-promoting alkane pristane.

Pristane (2,6,10,14-tetramethylpentadecane) is a C19-isoalkane that promotes the development of plasmacytomas in genetically susceptible BALB/c mice. Similarities between the effects of pristane and protein kinase C (PKC)-activating phorbol esters suggested that the tumor promoting activity of pristane might involve the activation of PKC. Here we show that up to 5 mol% of pristane can be homogeneously incorporated into phosphatidylcholine/phosphatidylserine bilayers. Membrane-incorporated pristane partially activated PKC and increased phorbol ester binding to the bilayer by more than 50%. Pristane (50 microM) delivered as an inclusion complex with beta-cyclodextrin to promyelocytic HL-60 leukemia cells induced a partial long-term translocation of PKC to the cell membrane. This was accompanied by differentiation of HL-60 cells into macrophage-like cells. It is concluded that activation of PKC may comprise an important aspect of the tumor promoting potential of pristane.[1]


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