ZC4H2, an XLID gene, is required for the generation of a specific subset of CNS interneurons

Pietro Chiurazzi, Giovanni Neri, Melanie May, Kyu-Seok Hwang, Judith Miles, Charlie Williams, Tejasvi Niranjan, Stephen G. Kahler, Katharina Steindl, Peter J. Van Der Spek, Sigrid Swagemakers, Jennifer Mueller, Shannon Stefl, Emil Alexov, Jeong-Im Ryu, Jung-Hwa Choi, Hyun-Taek Kim, Patrick Tarpey, Lynda Holloway, Cindy SkinnerRoger E. Stevenson, Richard I. Dorsky, Tao Wang, Charles E. Schwartz, Cheol-Hee Kim

Risultato della ricerca: Contributo in rivistaArticolo in rivista

21 Citazioni (Scopus)

Abstract

Miles-Carpenter syndrome (MCS) was described in 1991 as an XLID syndrome with fingertip arches and contractures and mapped to proximal Xq. Patients had microcephaly, short stature, mild spasticity, thoracic scoliosis, hyperextendable MCP joints, rocker-bottom feet, hyperextended elbows and knees. A mutation, p.L66H, in ZC4H2, was identified in a XLID resequencing project. Additional screening of linked families and next generation sequencing of XLID families identified three ZC4H2 mutations: p.R18K, p.R213W and p.V75in15aa. The families shared some relevant clinical features. In silico modeling of the mutant proteins indicated all alterations would destabilize the protein. Knockout mutations in zc4h2 were created in zebrafish and homozygous mutant larvae exhibited abnormal swimming, increased twitching, defective eye movement and pectoral fin contractures. Because several of the behavioral defects were consistent with hyperactivity, we examined the underlying neuronal defects and found that sensory neurons and motoneurons appeared normal. However, we observed a striking reduction in GABAergic interneurons. Analysis of cell-type-specificmarkers showed a specific loss of V2 interneurons in the brain and spinal cord, likely arising from mis-specification of neural progenitors. Injected human wt ZC4H2 rescued the mutant phenotype. Mutant zebrafish injectedwith human p.L66H or p.R213W mRNA failed to be rescued, while the p.R18K mRNA was able to rescue the interneuron defect. Our findings clearly support ZC4H2 as a novel XLID gene with a required function in interneuron development. Loss of function of ZC4H2 thus likely results in altered connectivity ofmany brain and spinal circuits.
Lingua originaleEnglish
pagine (da-a)4848-4861
Numero di pagine14
RivistaHUMAN MOLECULAR GENETICS
Volume24
DOI
Stato di pubblicazionePubblicato - 2015

Keywords

  • Animals
  • COS Cells
  • Carrier Proteins
  • Cell Line
  • Central Nervous System
  • Chlorocebus aethiops
  • Computational Biology
  • Female
  • Gene Expression
  • Genes, X-Linked
  • Humans
  • Interneurons
  • Intracellular Signaling Peptides and Proteins
  • Male
  • Mutation
  • Nuclear Proteins
  • Organ Specificity
  • Pedigree
  • Zebrafish

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