The selectable marker neo gene down-regulates gene expression from retroviral vectors containing an internal ribosome entry site
نویسندگان
چکیده
منابع مشابه
Internal ribosome entry site-based vectors for combined gene therapy.
Gene therapy appears as a promising strategy to treat incurable diseases. In particular, combined gene therapy has shown improved therapeutic efficiency. Internal ribosome entry sites (IRESs), RNA elements naturally present in the 5' untranslated regions of a few mRNAs, constitute a powerful tool to co-express several genes of interest. IRESs are translational enhancers allowing the translation...
متن کاملEnhanced gene expression from retroviral vectors
BACKGROUND Retroviruses are widely used to transfer genes to mammalian cells efficiently and stably. However, genetic elements required for high-level gene expression are incompatible with standard systems. The retroviral RNA genome is produced by cellular transcription and post-transcriptional processing within packaging cells: Introns present in the retroviral genomic transcript are removed b...
متن کاملGene expression from transcriptionally disabled retroviral vectors.
Retroviral vectors are used for the efficient transfer of foreign genes into mammalian cells. We report here the construction of murine retrovirus-based vectors carrying the full-length cDNA for human hypoxanthine phosphoribosyltransferase (HPRT; EC 2.4.2.8) and from which the enhancer sequences, the "CAAT box," and the "TATA box" in the long terminal repeats (LTRs) have been deleted. After inf...
متن کاملRetroviral vectors containing putative internal ribosome entry sites: development of a polycistronic gene transfer system and applications to human gene therapy.
Recombinant retroviral vectors producing multicistronic mRNAs were constructed. Picornavirus putative internal ribosome entry sites (IRES) were used to confer cap-independent translation of an internal cistron. Internal cistrons were engineered by ligation of various lengths of the IRES of encephalomyocarditis (EMC) virus or polio virus to the E. coli chloramphenicol acetyltransferase (CAT) gen...
متن کاملNew insights into internal ribosome entry site elements relevant for viral gene expression.
A distinctive feature of positive-strand RNA viruses is the presence of high-order structural elements at the untranslated regions (UTR) of the genome that are essential for viral RNA replication. The RNA of all members of the family Picornaviridae initiate translation internally, via an internal ribosome entry site (IRES) element present in the 5' UTR. IRES elements consist of cis-acting RNA s...
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ژورنال
عنوان ژورنال: Gene Therapy
سال: 1998
ISSN: 0969-7128,1476-5462
DOI: 10.1038/sj.gt.3300762