Homozygous mutation in PRUNE1 in an Oji‐Cree male with a complex neurological phenotype

• Published in: American journal of medical genetics. Part A Vol. 173; no. 3; pp. 740 - 743
• Main Authors: Costain, Gregory, Shugar, Andrea, Krishnan, Pradeep, Mahmutoglu, Saadet, Laughlin, Suzanne, Kannu, Peter
• Format: Journal Article
• Language: English
• Published: United States Wiley Subscription Services, Inc 01.03.2017
• Subjects: Brain - pathology; brain structure; Cell adhesion & migration; Cell migration; Child, Preschool; Chromosome Mapping; Cree; DRES17; Exome; Facies; Fetuses; founder effect; Genetic Association Studies; Genomes; High-Throughput Nucleotide Sequencing; Homozygote; HTCD37; Humans; infantile spasms; Magnetic Resonance Imaging; Male; Mutation; Ojibwe; Phenotype; Phenotypes; PRUNE; PRUNE1; whole‐exome sequencing; founder effect; Ojibwe; PRUNE; PRUNE1; HTCD37; brain structure; whole-exome sequencing; infantile spasms; Cree; DRES17
• ISSN: 1552-4825; 1552-4833
• DOI: 10.1002/ajmg.a.38066

The PRUNE1 gene encodes a member of the phosphoesterases (DHH) protein superfamily that is highly expressed in the human fetal brain and involved in the regulation of cell migration. Homozygous or compound heterozygous PRUNE1 mutations were recently identified in five individuals with brain malformations from four families. We present a case of a 2‐year‐old male with a complex neurological phenotype and abnormalities on brain MRI. Re‐annotation of clinical whole‐exome sequencing data revealed a homozygous likely pathogenic variant in PRUNE1 (c.521‐2A>G). These results further delineate a new PRUNE1‐related syndrome, and highlight the importance of periodic data re‐annotation in individuals who remain without a diagnosis after undergoing genome‐wide testing. © 2017 Wiley Periodicals, Inc.