Homozygous Deletion of the Very Low Density Lipoprotein Receptor Gene Causes Autosomal Recessive Cerebellar Hypoplasia with Cerebral Gyral Simplification

• Published in: American journal of human genetics Vol. 77; no. 3; pp. 477 - 483
• Main Authors: Boycott, Kym M., Flavelle, Shauna, Bureau, Alexandre, Glass, Hannah C., Fujiwara, T. Mary, Wirrell, Elaine, Davey, Krista, Chudley, Albert E., Scott, James N., McLeod, D. Ross, Parboosingh, Jillian S.
• Format: Journal Article
• Language: English
• Published: Chicago, IL Elsevier Inc 01.09.2005; University of Chicago Press; Cell Press; The American Society of Human Genetics
• Subjects: Base Sequence; Biological and medical sciences; Canada; Cerebellar Ataxia - genetics; Cerebellum - abnormalities; Cerebellum - pathology; Cerebral Cortex - abnormalities; Cerebral Cortex - pathology; Chromosome aberrations; Chromosome Mapping; Chromosomes, Human, Pair 9 - genetics; Gene Deletion; General aspects. Genetic counseling; Genes; Genes, Recessive - genetics; Genetic Predisposition to Disease - genetics; Haplotypes - genetics; Humans; Intellectual Disability - genetics; Low density lipoprotein receptors; Medical genetics; Medical sciences; Mental retardation; Molecular Sequence Data; Pedigree; Receptors, LDL - genetics; Reelin Protein; Sequence Analysis, DNA; Syndrome; Canada; Cerebellum; Human; Hypoplasia; Homozygosity; Encephalon; Genetic disease; Lipoprotein LDL; Gene; Malformation; Autosomal character; Deletion; Recessive character; Genetics; Biological receptor
• ISSN: 0002-9297; 1537-6605
• DOI: 10.1086/444400

An autosomal recessive syndrome of nonprogressive cerebellar ataxia and mental retardation is associated with inferior cerebellar hypoplasia and mild cerebral gyral simplification in the Hutterite population. An identity-by-descent mapping approach using eight patients from three interrelated Hutterite families localized the gene for this syndrome to chromosome region 9p24. Haplotype analysis identified familial and ancestral recombination events and refined the minimal region to a 2-Mb interval between markers D9S129 and D9S1871. A 199-kb homozygous deletion encompassing the entire very low density lipoprotein receptor ( VLDLR) gene was present in all affected individuals. VLDLR is part of the reelin signaling pathway, which guides neuroblast migration in the cerebral cortex and cerebellum. To our knowledge, this syndrome represents the first human lipoprotein receptor malformation syndrome and the second human disease associated with a reelin pathway defect.