Journal
JOURNAL OF VIROLOGY
Volume 86, Issue 17, Pages 9088-9095Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/JVI.00485-12
Keywords
-
Categories
Funding
- UK Health and Safety Executive
- UK Wellcome Trust
- EU [261387, 222878]
- UK Biotechnology and Biological Sciences Research Council
- Bundesministerium fur Bildung und Forschung [01GU0811, TP2b]
- Deutsche Forschungsgemeinschaft [1230]
- European Union [HEALTH-F5-2009-222878, HEALTH-2010-261387]
- BBSRC [BB/F015526/1] Funding Source: UKRI
- MRC [G0900950] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BB/F015526/1] Funding Source: researchfish
- Great Ormond Street Hospital Childrens Charity [V1259, V1223] Funding Source: researchfish
- Medical Research Council [G0900950B, G0900950] Funding Source: researchfish
- National Institute for Health Research [NF-SI-0611-10001] Funding Source: researchfish
Ask authors/readers for more resources
Gammaretroviral and lentiviral vectors have been used successfully in several clinical gene therapy trials, although powerful enhancer elements have caused insertional mutagenesis and clonal dysregulation. Self-inactivating vectors with internal heterologous regulatory elements have been developed as potentially safer and more effective alternatives. Lentiviral vectors containing a ubiquitous chromatin opening element from the human HNRPA2B1-CBX3 locus (A2UCOE), which allows position-independent, long-term transgene expression, are particularly promising. In a recently described assay, aberrantly spliced mRNA transcripts initiated in the vector A2UCOE sequence were found to lead to upregulation of growth hormone receptor gene (Ghr) expression in transduced murine Bcl-15 cells. Aberrant hybrid mRNA species formed between A2UCOE and a number of other cellular genes were also detected in transduced human PLB-985 myelomonocytic cells. Modification of the A2UCOE by mutation or deletion of recognized and potential cryptic splice donor sites was able to abrogate these splicing events and hybrid mRNA formation in Bcl-15 cells. This modification did not compromise A2UCOE regulatory activity in terms of resistance to CpG methylation and gene silencing in murine P19 embryonic carcinoma cells. These refined A2UCOE regulatory elements are likely to improve intrinsic biosafety and may be particularly useful for a number of clinical applications where robust gene expression is desirable.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available