NDLI: Aberrant transcription and post-transcriptional processing of hepatitis C virus non-structural genes in transgenic mice

Content Provider	Springer Nature Link
Author	Desai, Mayura M. Tumurbataar, Batbayar Zhang, Yueqing Chan, Lee Nien Lillian Sun, Jiaren Chan, Teh sheng
Copyright Year	2011
Abstract	Hepatitis C virus (HCV) infection is a leading cause of chronic liver disease worldwide. Since several aspects of the infection remain unresolved, there is a pressing need for a convenient animal model that can mimic the clinical disease and aid the evaluation of treatment strategies. Although some success has been achieved in transgenic approaches for development of rodent models of HCV, transgenic expression of the complete HCV polyprotein or an entire set of the viral non-structural (NS) proteins continues to be a serious challenge. Using northern blot and 5′ rapid amplification of cDNA ends (RACE), we unraveled two possible mechanisms that can impede HCV NS transgene expression in the mouse liver. Several truncated transcripts are produced from alternate transcription start sites along the HCV NS sequence within the murine environment, in vivo. Translation of these shorter transcripts is blocked either by the positioning of a contextual stop codon or through a shift in the reading frame. In addition, the complete NS transcript undergoes trans-splicing through 5′ recombination with a non-transgene-derived, spliced leader sequence that appends a potential stop codon upstream of the translation start. These findings thus demonstrate that HCV NS-derived transgenes are subject to aberrant transcriptional initiation and post-transcriptional processing in the nucleus of a mouse host. Strategies to prevent such aberrant transcription start/RNA processing might be key to the development of a successful HCV transgenic mouse model.
Starting Page	1273
Ending Page	1284
Page Count	12
File Format	PDF
ISSN	09628819
Journal	Transgenic Research
Volume Number	20
Issue Number	6
e-ISSN	15739368
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-02-24
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hepatitis C virus Non-structural proteins Transgenic mouse Aberrant transcription Trans-splicing Human Genetics Animal Genetics and Genomics Plant Sciences Plant Genetics & Genomics Molecular Medicine
Content Type	Text
Resource Type	Article
Subject	Genetics Animal Science and Zoology Biotechnology Agronomy and Crop Science

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