alexa Inhibition of human carcinoma and neuroblastoma cell proliferation by anti-c-myc siRNA.
Oncology

Oncology

Journal of Carcinogenesis & Mutagenesis

Author(s): Kabilova TO, Chernolovskaya EL, Vladimirova AV, Vlassov VV

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Abstract Suppression of c-myc proto-oncogene expression by small interfering RNA (siRNA) in human epidermoid carcinoma KB-3-1 and neuroblastoma SK-N-MC cell lines was investigated. The siRNA duplex targeted to the exon 3 of c-myc mRNA (siRNA-I) was prepared by in vitro transcription using T7 RNA polymerase and short double-stranded DNA (dsDNA) templates. siRNA-I was shown to efficiently decrease c-myc mRNA expression in both tumor cell lines and to arrest their proliferation. Incubation of KB-3-1 cells with 150 nM siRNA-I results in a 92\% decrease in the c-myc mRNA level and an 83\% decrease in the protein level. In SK-N-MC cells, 150 nM siRNA-I causes a 60\% decrease in the c-myc mRNA level and a 55\% decrease in the protein level. The reduction of the c-myc mRNA level correlates with the inhibition of cell proliferation; 150 nM siRNA-I causes a 2.5-fold reduction in the SK-N-MC proliferation rate and a 15-fold decrease in the proliferation rate and complete arrest of cell division in KB-3-1 cells. siRNA-I has little effect on proliferation of the IMR-32 cells that overexpress the N-myc but not the c-myc gene, demonstrating that siRNA-I antiproliferation activity is mediated by specific block of c-myc expression. This article was published in Oligonucleotides and referenced in Journal of Carcinogenesis & Mutagenesis

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