De Novo Mutation in Genes Regulating Neural Stem Cell Fate in Human Congenital Hydrocephalus

Authors

Document Type

Article

Abstract

Congenital hydrocephalus (CH), featuring markedly enlarged brain ventricles, is thought to arise from failed cerebrospinal fluid (CSF) homeostasis and is treated with lifelong surgical CSF shunting with substantial morbidity. CH pathogenesis is poorly understood. Exome sequencing of 125 CH trios and 52 additional probands identified three genes with significant burden of rare damaging de novo or transmitted mutations: TRIM71 (p = 2.15 × 10), SMARCC1 (p = 8.15 × 10), and PTCH1 (p = 1.06 × 10). Additionally, two de novo duplications were identified at the SHH locus, encoding the PTCH1 ligand (p = 1.2 × 10). Together, these probands account for ∼10% of studied cases. Strikingly, all four genes are required for neural tube development and regulate ventricular zone neural stem cell fate. These results implicate impaired neurogenesis (rather than active CSF accumulation) in the pathogenesis of a subset of CH patients, with potential diagnostic, prognostic, and therapeutic ramifications.

Medical Subject Headings

Cohort Studies; Exome (genetics); Female; Humans; Hydrocephalus (diagnosis, genetics); Male; Mutation (genetics); Neural Stem Cells (pathology, physiology); Patched-1 Receptor (genetics); Pedigree; Transcription Factors (genetics); Exome Sequencing (methods)

Publication Date

7-25-2018

Publication Title

Neuron

E-ISSN

1097-4199

Volume

99

Issue

2

First Page

302

Last Page

314.e4

PubMed ID

29983323

Digital Object Identifier (DOI)

10.1016/j.neuron.2018.06.019

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