A novel ISLR2-linked autosomal recessive syndrome of congenital hydrocephalus, arthrogryposis and abdominal distension
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ISLR2 (immunoglobulin superfamily containing leucine-rich repeat 2), encodes a protein involved in axon guidance in brain development (hence the other name leucine-rich repeat domain- and immunoglobulin domain-containing axon extension proteins; LINX). A recently described mouse knockout displays hydrocephalus. However, the corresponding phenotype in humans is unknown. Here, we describe a multiplex consanguineous family in which a homozygous truncating variant in ISLR2 segregates with severe congenital hydrocephalus, arthrogryposis multiplex congenita and abdominal distension. We suggest this syndrome may represent the human “knockout” phenotype for ISLR2.
We thank the study family for their enthusiastic participation. We also thank the Genotyping and Sequencing Core Facilities at KFSHRC for their technical support. This work was supported in part by KSCDR grant (FSA). We acknowledge the support of the Saudi Human Genome Program.
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Conflict of interest
Authors declare no conflict of interest.
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