Sequence-dependent and independent inhibition specific for mutant ataxin-3 by small interfering RNA.

Abstract:

:In Machado-Joseph disease (MJD) gene, there is a C/G polymorphism immediately after the CAG repeat; the expanded CAG repeat tract is exclusively followed by C, whereas about half of wild-type alleles are followed by G. Using this C/G polymorphism, we have engineered the small interfering RNA (siRNA) which decreased the expression of mutant ataxin-3, Q79C, by 96.0%, whereas there was minimal reduction on that of the wild type, Q22G (5.9%). Furthermore, unexpectedly, the expression of another wild-type allele, Q22C, was also much less suppressed (22.5%) by this siRNA possibly due to difference of the secondary structure of the target RNA. This is the first report of sequence-independent discrimination of mutant and wild-type alleles by siRNA.

journal_name

Ann Neurol

journal_title

Annals of neurology

authors

Li Y,Yokota T,Matsumura R,Taira K,Mizusawa H

doi

10.1002/ana.20141

keywords:

subject

Has Abstract

pub_date

2004-07-01 00:00:00

pages

124-9

issue

1

eissn

0364-5134

issn

1531-8249

journal_volume

56

pub_type

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