Heliyon (Apr 2023)

Copy number analysis from whole-exome sequencing data revealed a novel homozygous deletion in PARK7 leads to severe early-onset Parkinson's disease

  • Mohammad Reza Seyedtaghia,
  • Mohammad Soudyab,
  • Mohammad Shariati,
  • Reza Jafarzadeh Esfehani,
  • Shabnam Vafadar,
  • Neda Shalaei,
  • Vahid Nouri,
  • Michael Zech,
  • Julianne Winkelmann,
  • Ali shoeibi,
  • Ariane Sadr-Nabavi

Journal volume & issue
Vol. 9, no. 4
p. e15393

Abstract

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Parkinson's disease (PD), a neurodegenerative disease characterized by both motor neuron and non-motor neuron symptoms, is the most frequent neurodegenerative disease after Alzheimer's disease. Both genetic and environmental factors take part in disease etiology. Most cases are considered complex multifactorial diseases. About 15% of PD appear in the familial form, and about 5% of all cases arise from a single gene mutation. Among Mendelian causes of PD, PARK7 is one of the autosomal recessive forms due to loss-of-function mutations in both gene alleles. Both single nucleotide variants (SNVs) and copy number variations (CNVs) are observed in PARK7. This study presents an Iranian family with familial PD where some relatives had psychiatric disorders. A homozygous 1617 bp deletion in a female with early-onset PD was detected through copy-number analysis from whole-exome sequencing (WES) data in this consanguineous family. Further investigation by surveying microhomology revealed that the actual size of the deletion is 3,625 bp. This novel CNV that was in the PARK7gene is supposed to co-relation with early-onset PD and infertility in this family.

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