title: A novel c.1135_1138delCTGT mutation in CLN3 leads to juvenile neuronal ceroid lipofuscinosis.
abstract: Neuronal ceroid lipofuscinosis is the most common childhood neurodegenerative disorder in the world, with an incidence of 1 in 100,000 live births. More than 400 mutations in at least 14 different genes are linked to multiple clinical variants. These progressive genetic disorders primarily manifest in the central nervous system due to an extensive loss of neurons, primarily in the cerebral and cerebellar cortices. Juvenile neuronal ceroid lipofuscinosis is the most common form and is primarily due to mutations in CLN3, which encodes a protein of unknown function. The most common such mutation in CLN3 is a 1.02-kb deletion that results in a frameshift and subsequent premature termination codon. Here we describe a patient with juvenile neuronal ceroid lipofuscinosis who has a novel c.1135_1138delCTGT mutation in CLN3. This deletion induces a frameshift and premature termination codon in CLN3 messenger ribonucleic acid that is likely recognized by nonsense-mediated decay and degraded, subsequently leading to decreased CLN3 protein abundance.
authors.affiliation: Department of Ophthalmology and Visual Sciences, Carver College of Medicine, University of Iowa, Iowa City, IA, USA.
authors.forename: Arlene V
authors.initials: AV
authors.lastname: Drack
authors.forename: Jake N
authors.initials: JN
authors.lastname: Miller
authors.forename: David A
authors.initials: DA
authors.lastname: Pearce
mesh_terms: D002648:Child; D005260:Female; D006801:Humans; D008562:Membrane Glycoproteins / Q000235:genetics*; D018832:Molecular Chaperones / Q000235:genetics*; D009472:Neuronal Ceroid-Lipofuscinoses / Q000235:genetics*; D017384:Sequence Deletion
chemical_list: C105199:CLN3 protein, human; D008562:Membrane Glycoproteins; D018832:Molecular Chaperones
keywords: Batten disease; CLN3; juvenile neuronal ceroid lipofuscinosis; neuronal ceroid lipofuscinosis