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- W2064672110 abstract "The level of expression of the alpha isoform of protein kinase C (PKC-alpha) has been shown to correlate inversely with the pathologic differentiation of human pancreatic cancers.We stably transfected a moderately differentiated pancreatic cell line (HPAC) to overexpress PKC-alpha and examined the survival rates compared with parent HPAC according to an orthotopic model. Next we used a PKC-alpha antisense oligonucleotide specifically to down-regulate this isoform in vitro and examine the effect of treatment in vivo again according to the orthotopic model.Animals implanted with the overexpressing cell line had a mortality rate almost twice that of those implanted with the parent cell line (P < .01). Treatment with antisense oligonucleotide in increasing concentrations down-regulated PKC-alpha mRNA by Northern blot analysis and reverse transcriptase-polymerase chain reaction. Animals treated with antisense oligonucleotide after orthotopic implantation of pancreatic cancer cells survived statistically longer than those treated with vehicle alone (P = .005). Treatment with a scrambled oligonucleotide also conferred a survival benefit compared with vehicle alone (P < .01).Tumorigenicity of pancreatic cancer is related directly to PKC-alpha expression in vivo as demonstrated by decreased survival when overexpressed. PKC-alpha expression can be down-regulated directly (antisense) and indirectly (scrambled) in vitro, which subsequently confers a dramatic survival benefit in vivo." @default.
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- W2064672110 date "1998-08-01" @default.
- W2064672110 modified "2023-10-12" @default.
- W2064672110 title "Directed antisense therapy confirms the role of protein kinase C-alpha in the tumorigenicity of pancreatic cancer." @default.
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- W2064672110 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/9706141" @default.
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