Abstract:
:Gene transfer vectors encoding two or more genes are potentially powerful research tools and are poised to play an increasingly important role in gene therapy applications. Common strategies employed to express more than one transgene per vector include the use of multiple promoters, internal ribosome entry site (IRES) elements, splicing signals and fusion proteins. Of these, the IRES elements and multiple promoters have been most widely used. The use of multiple promoters, however, may be compromised by interference between promoters, promoter silencing and vector rearrangements or deletions. In this study, we demonstrate promoter interference between two internal heterologous promoters in the context of a late-generation lentiviral vector. The interference, involving the human cytomegalovirus-immediate-early promoter and human elongation-factor-1alpha promoter, occurred bidirectionally with both promoters markedly impairing expression of the adjacent transcription unit. The data presented not only highlight the potential for interference between these widely-used promoters, but also the value of a sequential approach to vector construction that allows such effects to be recognized.
journal_name
Gene Therjournal_title
Gene therapyauthors
Curtin JA,Dane AP,Swanson A,Alexander IE,Ginn SLdoi
10.1038/sj.gt.3303105subject
Has Abstractpub_date
2008-03-01 00:00:00pages
384-90issue
5eissn
0969-7128issn
1476-5462pii
3303105journal_volume
15pub_type
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