Abstract:
BACKGROUND:Double stranded RNA (dsRNA) has multiple anti-tumor mechanisms. Over the past several decades, there have been numerous attempts to utilize synthetic dsRNA to control tumor growth in animal models and clinical trials. Recently, it became clear that intracellular dsRNA is more effective than extracellular dsRNA on promoting apoptosis and orchestrating adaptive immune responses. To overcome the difficulty in delivering a large dose of synthetic dsRNA into tumors, we propose to deliver a RNA replicase-based plasmid DNA, hypothesizing that the dsRNA generated by the replicase-based plasmid in tumor cells will inhibit tumor growth. METHODS:The anti-tumor activity of a plasmid (pSIN-β) that encodes the sindbis RNA replicase genes (nsp1-4) was evaluated in mice with model tumors (TC-1 lung cancer cells or B16 melanoma cells) and compared to a traditional pCMV-β plasmid. RESULTS:In cell culture, transfection of tumor cells with pSIN-β generated dsRNA. In mice with model tumors, pSIN-β more effectively delayed tumor growth than pCMV-β, and in some cases, eradicated the tumors. CONCLUSION:RNA replicase-based plasmid may be exploited to generate intracellular dsRNA to control tumor growth.
journal_name
BMC Cancerjournal_title
BMC cancerauthors
Rodriguez BL,Yu Z,Chung WG,Weiss R,Cui Zdoi
10.1186/1471-2407-11-110subject
Has Abstractpub_date
2011-03-28 00:00:00pages
110issn
1471-2407pii
1471-2407-11-110journal_volume
11pub_type
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