Novel Chemically-modified DNAzyme targeting Integrin alpha-4 RNA transcript as a potential molecule to reduce inflammation in multiple sclerosis.

Abstract:

:Integrin alpha-4 (ITGA4) is a validated therapeutic target for multiple sclerosis (MS) and Natalizumab, an antibody targeting ITGA4 is currently approved for treating MS. However, there are severe side effects related to this therapy. In this study, we report the development of a novel DNAzyme that can efficiently cleave the ITGA4 transcript. We designed a range of DNAzyme candidates across various exons of ITGA4. RNV143, a 30mer arm-loop-arm type DNAzyme efficiently cleaved 84% of the ITGA4 mRNA in human primary fibroblasts. RNV143 was then systematically modified by increasing the arm lengths on both sides of the DNAzymes by one, two and three nucleotides each, and incorporating chemical modifications such as inverted-dT, phosphorothioate backbone and LNA-nucleotides. Increasing the arm length of DNAzyme RNV143 did not improve the efficiency however, an inverted-dT modification provided the most resistance to 3' → 5' exonuclease compared to other modifications tested. Our results show that RNV143A could be a potential therapeutic nucleic acid drug molecule towards the treatment for MS.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Chakravarthy M,Aung-Htut MT,Le BT,Veedu RN

doi

10.1038/s41598-017-01559-w

subject

Has Abstract

pub_date

2017-05-09 00:00:00

pages

1613

issue

1

issn

2045-2322

pii

10.1038/s41598-017-01559-w

journal_volume

7

pub_type

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