Homozygous deletion of the very low density lipoprotein receptor gene causes autosomal recessive cerebellar hypoplasia with cerebral gyral simplification.
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.
Boycott
Kym M
KM
Department of Medical Genetics, Alberta Children's Hospital and University of Calgary, Alberta, Canada.
Flavelle
Shauna
S
Bureau
Alexandre
A
Glass
Hannah C
HC
Fujiwara
T Mary
TM
Wirrell
Elaine
E
Davey
Krista
K
Chudley
Albert E
AE
Scott
James N
JN
McLeod
D Ross
DR
Parboosingh
Jillian S
JS
D001483:Base Sequence; D002170:Canada; D002524:Cerebellar Ataxia / Q000235:genetics*; D002531:Cerebellum / Q000002:abnormalities* / Q000473:pathology; D002540:Cerebral Cortex / Q000002:abnormalities* / Q000473:pathology; D002874:Chromosome Mapping; D002899:Chromosomes, Human, Pair 9 / Q000235:genetics*; D017353:Gene Deletion; D005808:Genes, Recessive / Q000235:genetics; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D006239:Haplotypes / Q000235:genetics; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D008969:Molecular Sequence Data; D010375:Pedigree; D011973:Receptors, LDL / Q000235:genetics*; D000091042:Reelin Protein; D017422:Sequence Analysis, DNA; D013577:Syndrome
D011973:Receptors, LDL; D000091042:Reelin Protein; C036053:VLDL receptor; C000717127:RELN protein, human