Ube3a reinstatement identifies distinct developmental windows in a murine Angelman syndrome model

J Clin Invest. 2015 May;125(5):2069-76. doi: 10.1172/JCI80554. Epub 2015 Apr 13.


Angelman syndrome (AS) is a severe neurodevelopmental disorder that results from loss of function of the maternal ubiquitin protein ligase E3A (UBE3A) allele. Due to neuron-specific imprinting, the paternal UBE3A copy is silenced. Previous studies in murine models have demonstrated that strategies to activate the paternal Ube3a allele are feasible; however, a recent study showed that pharmacological Ube3a gene reactivation in adulthood failed to rescue the majority of neurocognitive phenotypes in a murine AS model. Here, we performed a systematic study to investigate the possibility that neurocognitive rescue can be achieved by reinstating Ube3a during earlier neurodevelopmental windows. We developed an AS model that allows for temporally controlled Cre-dependent induction of the maternal Ube3a allele and determined that there are distinct neurodevelopmental windows during which Ube3a restoration can rescue AS-relevant phenotypes. Motor deficits were rescued by Ube3a reinstatement in adolescent mice, whereas anxiety, repetitive behavior, and epilepsy were only rescued when Ube3a was reinstated during early development. In contrast, hippocampal synaptic plasticity could be restored at any age. Together, these findings suggest that Ube3a reinstatement early in development may be necessary to prevent or rescue most AS-associated phenotypes and should be considered in future clinical trial design.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Age Factors
  • Angelman Syndrome / embryology
  • Angelman Syndrome / genetics*
  • Angelman Syndrome / physiopathology
  • Angelman Syndrome / therapy
  • Animals
  • Anxiety / genetics
  • Anxiety / physiopathology
  • Anxiety / therapy
  • Cerebellum / embryology
  • Cerebellum / physiopathology
  • Cerebral Cortex / embryology
  • Cerebral Cortex / physiopathology
  • Disease Models, Animal
  • Epilepsy / genetics
  • Epilepsy / physiopathology
  • Epilepsy / therapy
  • Female
  • Gene Expression Regulation, Developmental*
  • Genes, Synthetic
  • Genomic Imprinting
  • Hippocampus / embryology
  • Hippocampus / physiopathology
  • Male
  • Mice
  • Movement Disorders / genetics
  • Movement Disorders / physiopathology
  • Movement Disorders / therapy
  • Neuronal Plasticity
  • Phenotype
  • Recombinant Fusion Proteins / biosynthesis
  • Recombinant Fusion Proteins / genetics
  • Stereotyped Behavior / physiology
  • Tamoxifen / pharmacology
  • Ubiquitin-Protein Ligases / biosynthesis
  • Ubiquitin-Protein Ligases / deficiency
  • Ubiquitin-Protein Ligases / genetics
  • Ubiquitin-Protein Ligases / physiology*


  • Recombinant Fusion Proteins
  • Tamoxifen
  • Ube3a protein, mouse
  • Ubiquitin-Protein Ligases