Methods of inhibiting or reducing tumor growth are disclosed. A composition containing at least one selected oncolytic virus is administered within a tumor of a patient. The virus kills cancerous cells and induces a systemic and lasting anti-tumor immunity that is also compatible with other cancer treatments. Also disclosed are methods of creating synthetic viruses for targeting cancerous tumors.
Screening assay for hepatitis C virus antiviral agents
申请人:——
公开号:US20030148267A1
公开(公告)日:2003-08-07
The invention includes methods of identifying compounds that increase the mutation rate of hepatitis C virus. The invention can be used to screen libraries of test compounds, including both nucleoside analogs and non-nucleoside analogs. The methods include: 1) contacting a test cell with a candidate compound, wherein the test cell contains a nucleic acid molecule comprising an infectious hepatitis C viral genome, a ribozyme, and an inducible promoter operably linked to the first and second nucleotide sequences, the ribozyme being configured to remove a 3′ sequence unnecessary for replication of the infectious hepatitis C viral genome from a transcript initiated by the inducible promote; and 2) the detection of an increase in hepatitis C virus quasispecies produced by the cell in the presence of the candidate compound. Detection of an increase in quasispecies can be accomplished by, e.g., sequencing HCV nucleic acid molecules isolated from the test cell.
Induction of viral mutation by incorporation of miscoding ribonucleoside analogs into viral RNA
申请人:——
公开号:US20030119764A1
公开(公告)日:2003-06-26
The present invention is directed to the identification and use of ribonucleoside analogs to induce the mutation of an RNA virus, including BVDV, HIV and HCV, or a virus which otherwise replicates through an RNA intermediate. The increase in the mutation rate of the virus results in reduced viability of progeny generations of the virus, thereby inhibiting viral replication. In addition to these methods and related compositions, the invention provides methods and combinatorial chemistry libraries for screening ribonucleoside analogs for mutagenic potential.
Mutagenesis methods using ribavirin and/or RNA replicases
申请人:Coia Gregory
公开号:US20050266453A1
公开(公告)日:2005-12-01
The use of RNA-replicases for introducing mutations into and selecting for improved RNA molecules is described. The use of ribavirin, or a derivative/analogue thereof, in methods for introducing one or more mutations during replication or transcription of a target nucleic acid molecule is also described. These methods can be used to screen for nucleic acids, or proteins encoded thereby, with altered or new activity. Also provided are kits comprising ribavirin, or a derivative/analogue thereof, for use in mutagenesis procedures.
The present invention relates to the field of evolution of nucleic acids in vivo and provides methods and compositions for introducing diversity into gene products. The present invention allows generation of new sequences that have desirable properties by virtue of high frequency mutation events within a cell. The high frequency mutation of a polynucleotide sequence results in, the production of a large population of new sequence variants. Appropriate selection and/or screening permits identification and isolation of mutant forms of the polynucleotide sequence as well as products resulting from expression of the mutant sequences.