title: Novel NDE1 homozygous mutation resulting in microhydranencephaly and not microlyssencephaly.
abstract: Lissencephaly is characterized by deficient cortical lamination. Recently homozygous NDE1 mutations were reported in three kindred afflicted with extreme microcephaly with lissencephaly or microlissencephaly. Another severe developmental defect that involves the brain is microhydranencephaly which manifests with microcephaly, motor and mental retardation and brain malformations that include gross dilation of the ventricles with complete absence of the cerebral hemispheres or severe delay in their development. In the three related patients with microhydranencephaly that we had reported previously, we identified a homozygous deletion that encompasses NDE1 exon 2 containing the initiation codon. The mutation is predicted to result in a null allele. Herein we compare the clinical phenotypes of our research patients to those reported as microlissencephaly. The clinical findings in our patients having the fourth NDE1 mutation reported so far widen the spectrum of brain malformations resulting from mutations in NDE1.
authors.affiliation: Department of Molecular Biology and Genetics, Boğaziçi University, KP 301, Bebek, 34342 Istanbul, Turkey.
authors.forename: Ayse
authors.initials: A
authors.lastname: Guven
authors.forename: Aysegul
authors.initials: A
authors.lastname: Gunduz
authors.forename: Tarik M
authors.initials: TM
authors.lastname: Bozoglu
authors.forename: Cengiz
authors.initials: C
authors.lastname: Yalcinkaya
authors.forename: Aslıhan
authors.initials: A
authors.lastname: Tolun
mesh_terms: D000293:Adolescent; D000328:Adult; D000483:Alleles; D001921:Brain / Q000473:pathology; D005091:Exons; D019066:Facies; D005260:Female; D017353:Gene Deletion; D006720:Homozygote; D006801:Humans; D006832:Hydranencephaly / Q000235:genetics*; D008279:Magnetic Resonance Imaging / Q000379:methods; D008831:Microcephaly / Q000235:genetics*; D008869:Microtubule-Associated Proteins / Q000235:genetics*; D008957:Models, Genetic; D009154:Mutation; D010641:Phenotype; D017422:Sequence Analysis, DNA
chemical_list: D008869:Microtubule-Associated Proteins; C525094:Nde1 protein, human