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Neurological Sciences

, Volume 40, Issue 2, pp 299–303 | Cite as

A novel homozygous nonsense mutation in CCDC88A gene cause PEHO-like syndrome in consanguineous Saudi family

  • Angham Abdulrahman Abdulkareem
  • Khalid Omar Abulnaja
  • Mohammad M. Jan
  • Sajjad Karim
  • Mahmood Rasool
  • Shakeel Ahmed Ansari
  • Adeel G. Chaudhary
  • Mohammad H. Al-Qahtani
  • Muhammad Imran NaseerEmail author
Original Article

Abstract

Progressive encephalopathy, edema, hypsarrhythmia, and optic atrophy (PEHO) syndrome is an unusual Mendelian phenotype of unidentified origin that causes profound intellectual disability, optic nerve/cerebellar atrophy, epileptic seizures, developmental progress, pedal edema, and early death. Uncharacteristic affected individuals are often classified as having PEHO-like syndrome, although they may be misdiagnosed as having epileptic encephalopathy, a potential result of early birth. In this study, we report a consanguineous Saudi family with a novel homozygous nonsense mutation of the CCDC88A gene causing PEHO-like syndrome. The children were suffering from developmental delay, epilepsy, mental disability, optic nerve/cerebellar atrophy, and pedal edema. Whole exome sequencing was conducted for the members of the family who have the disorder to study the novel mutation. Whole exome sequencing data analysis, confirmed by subsequent Sanger sequencing validation, identified a novel homozygous nonsense mutation c. 1292G > A, which was caused by p.Trp431* stop gain. This mutation was ruled out in 100 unrelated healthy controls. The nonsense homozygous mutation detected in this study has not yet been reported as pathogenic in the literature or various databases. In conclusion, a complete loss of protein function due to premature stop gain was caused by a mutation in exon 12 of CCDC88A. This loss may lead to PEHO phenotype. CCDC88A gene may therefore play an important and critical role for multiple aspects of normal human neurodevelopment.

Keywords

CCDC88A gene PEHO-like syndrome Epilepsy Intellectual disability Saudi family 

Notes

Acknowledgments

The authors also, acknowledge with thanks Science and Technology Unit, King Abdul-Aziz University for technical support.

Author’s contributions

M. I. N. conceived and designed the project. M. I. N. and A. A. A. performed experiments and confirmed these results. M. I. N., M. A. J., and A. G. C. analyzed and interpreted the data. M. I. N. and M. A. J. provided and interpreted phenotypic details for the patients. M. H. A., A. G. C., and K. O. A. advised on the study design and writing of the manuscript. M. I. N wrote the manuscript.

Funding information

This project was funded by the National Plan for Science, Technology and Innovation (MAARIFAH)—King Abdul-Aziz City for Science and Technology—the Kingdom of Saudi Arabia—award number (12-BIO3059-03).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag Italia S.r.l., part of Springer Nature 2018

Authors and Affiliations

  • Angham Abdulrahman Abdulkareem
    • 1
  • Khalid Omar Abulnaja
    • 1
  • Mohammad M. Jan
    • 2
  • Sajjad Karim
    • 1
  • Mahmood Rasool
    • 1
  • Shakeel Ahmed Ansari
    • 1
  • Adeel G. Chaudhary
    • 1
    • 3
    • 4
  • Mohammad H. Al-Qahtani
    • 1
  • Muhammad Imran Naseer
    • 1
    Email author
  1. 1.Center of Excellence in Genomic Medicine Research (CEGMR)King Abdulaziz UniversityJeddahKingdom of Saudi Arabia
  2. 2.Department of Medical GeneticsKing Fahad General HospitalJeddahSaudi Arabia
  3. 3.KACST Technology Innovation Center in Personalized MedicineKing Abdulaziz UniversityJeddahSaudi Arabia
  4. 4.Faculty of Applied Medical SciencesKing Abdulaziz UniversityJeddahSaudi Arabia

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