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Published in: Molecular Pain 1/2013

Open Access 01-12-2013 | Research

Intraperitoneal administration of AAV9-shRNA inhibits target gene expression in the dorsal root ganglia of neonatal mice

Authors: Akira Machida, Hiroya Kuwahara, Azat Mayra, Takayuki Kubodera, Takashi Hirai, Fumiko Sunaga, Mio Tajiri, Yukihiko Hirai, Takashi Shimada, Hidehiro Mizusawa, Takanori Yokota

Published in: Molecular Pain | Issue 1/2013

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Abstract

Background

There is considerable interest in inducing RNA interference (RNAi) in neurons to study gene function and identify new targets for disease intervention. Although short interfering RNAs (siRNAs) have been used to silence genes in neurons, in vivo delivery of RNAi remains a major challenge, especially by systemic administration. We have developed a highly efficient method for in vivo gene silencing in dorsal root ganglia (DRG) by using short hairpin RNA–expressing single-stranded adeno-associated virus 9 (ssAAV9-shRNA).

Results

Intraperitoneal administration of ssAAV9-shRNA to neonatal mice resulted in highly effective and specific silencing of a target gene in DRG. We observed an approximately 80% reduction in target mRNA in the DRG, and 74.7% suppression of the protein was confirmed by Western blot analysis. There were no major side effects, and the suppression effect lasted for more than three months after the injection of ssAAV9-shRNA.

Conclusions

Although we previously showed substantial inhibition of target gene expression in DRG via intrathecal ssAAV9-shRNA administration, here we succeeded in inhibiting target gene expression in DRG neurons via intraperitoneal injection of ssAAV9-shRNA. AAV9-mediated delivery of shRNA will pave the way for creating animal models for investigating the molecular biology of the mechanisms of pain and sensory ganglionopathies.
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Metadata
Title
Intraperitoneal administration of AAV9-shRNA inhibits target gene expression in the dorsal root ganglia of neonatal mice
Authors
Akira Machida
Hiroya Kuwahara
Azat Mayra
Takayuki Kubodera
Takashi Hirai
Fumiko Sunaga
Mio Tajiri
Yukihiko Hirai
Takashi Shimada
Hidehiro Mizusawa
Takanori Yokota
Publication date
01-12-2013
Publisher
BioMed Central
Published in
Molecular Pain / Issue 1/2013
Electronic ISSN: 1744-8069
DOI
https://doi.org/10.1186/1744-8069-9-36

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