Brain Nat8l Knockdown Suppresses Spongiform Leukodystrophy in an Aspartoacylase-Deficient Canavan Disease Mouse Model

Peter Bannerman, Fuzheng Guo, Olga Chechneva, Travis Burns, Xiaoqing Zhu, Yan Wang, Bokyung Kim, Naveen K. Singhal, Jennifer A. McDonough, David E Pleasure

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Canavan disease, a leukodystrophy caused by loss-of-function ASPA mutations, is characterized by brain dysmyelination, vacuolation, and astrogliosis (“spongiform leukodystrophy”). ASPA encodes aspartoacylase, an oligodendroglial enzyme that cleaves the abundant brain amino acid N-acetyl-L-aspartate (NAA) to L-aspartate and acetate. Aspartoacylase deficiency results in a 50% or greater elevation in brain NAA concentration ([NAAB]). Prior studies showed that homozygous constitutive knockout of Nat8l, the gene encoding the neuronal NAA synthesizing enzyme N-acetyltransferase 8-like, prevents aspartoacylase-deficient mice from developing spongiform leukodystrophy. We now report that brain Nat8l knockdown elicited by intracerebroventricular/intracisternal administration of an adeno-associated viral vector carrying a short hairpin Nat8l inhibitory RNA to neonatal aspartoacylase-deficient AspaNur7/Nur7 mice lowers [NAAB] and suppresses development of spongiform leukodystrophy. Prior studies demonstrated that constitutive Nat8l knockout prevents aspartoacylase-deficient mice from developing spongiform leukodystrophy. Bannerman et al. now report that neonatal intracerebroventricular/intracisternal administration of an adeno-associated viral vector carrying an Nat8l inhibitory short hairpin RNA preserves motor function and suppresses spongiform leukodystrophy in 3-month-old aspartoacylase-deficient mice.

Original languageEnglish (US)
Pages (from-to)793-800
Number of pages8
JournalMolecular Therapy
Volume26
Issue number3
DOIs
StatePublished - Mar 7 2018

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Keywords

  • Canavan disease
  • leukodystrophy
  • Nat8l knockdown

ASJC Scopus subject areas

  • Molecular Medicine
  • Molecular Biology
  • Genetics
  • Pharmacology
  • Drug Discovery

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