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Angelman Syndrome is a rare neurodevelopmental disorder caused by several (epi)genetic alterations. The patients present strong neurological impairment due to the absence of a functional maternal UBE3A gene in neurons. Here, we generated and characterized a new induced pluripotent stem cell (iPSC) line from a female child with Angelman syndrome harbouring a class II deletion. iPSCs were reprogrammed from fibroblasts using Sendai viruses. The new iPSCs express pluripotency markers, are capable of trilineage in vitro differentiation and have the expected imprinting status of Angelman syndrome. These iPSCs are a valuable tool to elucidate the pathophysiological mechanisms associated with this disease.
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http://dx.doi.org/10.1016/j.scr.2022.102757 | DOI Listing |
Commun Biol
September 2025
UNC Neuroscience Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
Angelman syndrome (AS) is a debilitating neurodevelopmental disorder caused by loss of maternally-inherited UBE3A. In neurons, paternally-inherited UBE3A is silenced in cis by a long non-coding RNA called Ube3a-ATS. Here, we found that Neisseria meningitidis Cas9 with two mutations (D15A and H587A) in the nuclease domains (dNmCas9) can unsilence the dormant paternal Ube3a allele in mouse and human neurons when targeted to Snord115 snoRNA genes located in introns of Ube3a-ATS.
View Article and Find Full Text PDFJAMA Pediatr
September 2025
Department of Physical Medicine and Rehabilitation, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.
J Intellect Disabil Res
September 2025
Department of Psychiatry and Behavioral Sciences, Boston Children's Hospital, Boston, Massachusetts, USA.
Background: Angelman syndrome (AS) is a developmental disorder caused by one of four molecular aetiologies. Affected individuals have intellectual disability (ID), limited speech, seizures and sleep problems. Parents of individuals with AS exhibit elevated stress compared to parents of individuals with other IDs.
View Article and Find Full Text PDFMol Psychiatry
August 2025
Department of Neuroscience of Disease, Brain Research Institute, Niigata University, Niigata, 951-8585, Japan.
Individuals with autism spectrum disorder (ASD) have a greater prevalence of deficits in social interactions and repetitive behaviours, which are influenced by hereditary and environmental factors. How environmental factors influence genetically predisposed individuals remains unknown. Here, we provide new evidence of the interplay between social behaviour and environmental influences, by manipulating perceived safety and threat levels in ube3a mutant zebrafish, a mutation that is linked to Angelman syndrome and ASD.
View Article and Find Full Text PDFNucleic Acids Res
August 2025
Roche Pharma Research and Early Development, Neuroscience and Rare Disease discovery and translational area, Roche Innovation Center Basel, Basel 4070, Switzerland.
Angelman syndrome (AS) is a severe neurodevelopmental disorder caused by the loss of neuronal ubiquitin E3 ligase UBE3A, with no available treatment. Restoring UBE3A by downregulating the paternally cis-acting long noncoding antisense transcript (UBE3A-ATS) is a potentially disease modifying strategy. However, developing molecules targeting human UBE3A-ATS is challenging due to its selective expression in mature neurons and lack of sequence conservation across species.
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