Identification of CHCHD2 mutations in patients with Alzheimer's disease, amyotrophic lateral sclerosis and frontotemporal dementia in China

Liu,Xixi; Jiao,Bin; Zhang,Weiwei; Xiao,Tingting; Hou,Lihua; Pan,Chuzheng; Tang,Beisha; Shen,Lu

doi:10.3892/mmr.2018.8962

Identification of CHCHD2 mutations in patients with Alzheimer's disease, amyotrophic lateral sclerosis and frontotemporal dementia in China

Authors:
- Xixi Liu
- Bin Jiao
- Weiwei Zhang
- Tingting Xiao
- Lihua Hou
- Chuzheng Pan
- Beisha Tang
- Lu Shen
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Affiliations: Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
Published online on: May 3, 2018 https://doi.org/10.3892/mmr.2018.8962
Pages: 461-466

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Abstract

Recently, the coiled‑coil‑helix‑coiled‑coil‑helix domain 2 (CHCHD2) gene was identified as a possible causative gene for Parkinson's disease (PD). Three other neurodegenerative diseases, Alzheimer's disease (AD), amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD), share significant overlaps with PD in clinical phenotypes, pathological features and genetic heredities, and it is still unclear whether CHCHD2 variants could explain these three diseases. The present study screened all exons of the CHCHD2 gene in a total of 780 patients (511 AD, 181 ALS and 88 FTD) and 500 healthy controls from the Chinese Han population. Two missense variants, 5C>T (Pro2Leu) and 238A>G (Ile80Val), were identified in five unrelated patients with AD while no mutations were observed in patients with ALS or FTD. These mutations have been reported as low‑frequency variants in the ExAC database with frequencies of 0.0075 and 0.000025. Pro2 Leu, however, was also detected in controls and was confirmed to have no significant association with the risk for AD; Ile80Val was not detected in any normal controls, suggesting that the CHCHD2 gene may be associated with AD in the Chinese Han population.

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