Systemic administration of a deoxyribozyme to xylosyltransferase-1 mRNA promotes recovery after a spinal cord contusion injury.

Abstract:

:After spinal cord injury, proteoglycans with growth-inhibitory glycosaminoglycan (GAG-) side chains in scar tissue limit spontaneous axonal sprouting/regeneration. Interventions that reduce scar-related inhibition facilitate an axonal growth response and possibly plasticity-based spinal cord repair. Xylosyltransferase-1 (XT-1) is the enzyme that initiates GAG-chain formation. We investigated whether intravenous administration of a deoxyribozyme (DNA enzyme) to XT-1 mRNA (DNAXT-1as) would elicit plasticity after a clinically relevant contusion of the spinal cord in adult rats. Our data showed that systemic DNAXT-1as administration resulted in a significant increase in sensorimotor function and serotonergic axon presence caudal to the injury. DNAXT1as treatment did not cause pathological or toxicological side effects. Importantly, intravenous delivery of DNAXT-1as did not exacerbate contusion-induced neuropathic pain. Collectively, our data demonstrate that DNAXT-1as is a safe neurotherapeutic, which holds promise to become an integral component of therapies that aim to improve the quality of life of persons with spinal cord injury.

journal_name

Exp Neurol

journal_title

Experimental neurology

authors

Oudega M,Chao OY,Avison DL,Bronson RT,Buchser WJ,Hurtado A,Grimpe B

doi

10.1016/j.expneurol.2012.06.006

subject

Has Abstract

pub_date

2012-09-01 00:00:00

pages

170-9

issue

1

eissn

0014-4886

issn

1090-2430

pii

S0014-4886(12)00241-5

journal_volume

237

pub_type

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