Human melanoma metastasis is inhibited following ex vivo treatment with an antisense oligonucleotide to protein kinase C-alpha

Cancer Letters
J U DennisD R Welch

Abstract

To determine whether alteration of PKC alpha expression would affect the metastatic potential of human melanoma cells, replicate cultures of C8161 cells were treated in vitro with a phosphorothioate antisense oligodeoxynucleotide (ODN) that specifically inhibits PKC alpha expression (ISIS-3521). Control C8161 cultures were treated with a scrambled sequence ODN, cationic liposomes or were left untreated. Northern blots demonstrated 70% inhibition of PKC alpha mRNA in ISIS-3521-treated cells compared to controls. Metastasis was suppressed by 75% when ISIS-3521-treated cells were injected intravenously into athymic mice. These results show that PKC alpha expression is important in the regulation of human melanoma metastasis.

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