Abstract：
: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.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Janz S,Gawrisch K,Lester DSsubject
Has Abstractpub_date
1995-02-01 00:00:00pages
518-24issue
3eissn
0008-5472issn
1538-7445journal_volume
55pub_type
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