The phenotypic spectrum of PCDH12 associated disorders - Five new cases and review of the literature

Research output: Contribution to journalReview articleInvitedpeer-review

Contributors

  • Walid Fazeli - , University of Cologne, University of Bonn (Author)
  • Daniel Bamborschke - , University of Cologne (Author)
  • Abubakar Moawia - , University of Cologne (Author)
  • Somayeh Bakhtiari - , Phoenix Children's Hospital, University of Arizona (Author)
  • Abbas Tafakhori - , Tehran University of Medical Sciences (Author)
  • Matthias Giersdorf - , University of Cologne (Author)
  • Andreas Hahn - , Justus Liebig University Giessen (Author)
  • Anja Weik - , CeGaT GmbH (Author)
  • Kirsten Kolzter - , Cologne City Clinics (Author)
  • Sajad Shafiee - , Mazandaran University of Medical Sciences (Author)
  • Sheng Chih Jin - , Washington University St. Louis (Author)
  • Friederike Körber - , University of Cologne (Author)
  • Min Ae Lee-Kirsch - , Department of Paediatrics (Author)
  • Hossein Darvish - , Golestan University of Medical Sciences (Author)
  • Sebahattin Cirak - , University of Cologne (Author)
  • Michael C. Kruer - , Phoenix Children's Hospital, University of Arizona (Author)
  • Anne Koy - , University of Cologne (Author)

Abstract

PCDH12 is a member of the non-clustered protocadherin family of calcium-dependent cell adhesion proteins, which are involved in the regulation of brain development and endothelial adhesion. To date, only 15 families have been reported with PCDH12 associated disease. The main features previously associated with PCDH12 deficiency are developmental delay, movement disorder, epilepsy, microcephaly, visual impairment, midbrain malformations, and intracranial calcifications. Here, we report novel clinical features such as onset of epilepsy after infancy, episodes of transient developmental regression, and dysplasia of the medulla oblongata associated with three different novel truncating PCDH12 mutations in five cases (three children, two adults) from three unrelated families. Interestingly, our data suggests a clinical overlap with interferonopathies, and we show an elevated interferon score in two pediatric patients. This case series expands the genetic and phenotypic spectrum of PCDH12 associated diseases and highlights the broad clinical variability.

Details

Original languageEnglish
Pages (from-to)7-13
Number of pages7
JournalEuropean journal of paediatric neurology
Volume36
Publication statusPublished - Jan 2022
Peer-reviewedYes

External IDs

PubMed 34773825

Keywords

Keywords

  • Brain malformation, Epilepsy, Interferonopathy, Intracranial calcification, Movement disorder, PCDH12

Library keywords