Complete sequence analysis of mitochondrial DNA and telomere length in aplastic anemia

Cui,Xing; Wang,Junqiang; Cai,Zhiguo; Wang,Jingyi; Liu,Kui; Cui,Siyuan; Zhang,Jie; Luo,Yaqin; Wang,Xin; Li,Weiwei; Jing,Jingyan

doi:10.3892/ijmm.2014.1898

Complete sequence analysis of mitochondrial DNA and telomere length in aplastic anemia

Authors:
- Xing Cui
- Junqiang Wang
- Zhiguo Cai
- Jingyi Wang
- Kui Liu
- Siyuan Cui
- Jie Zhang
- Yaqin Luo
- Xin Wang
- Weiwei Li
- Jingyan Jing
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Affiliations: Post-doctoral Research Station, Shandong University, Jinan, P.R. China, Department of Health Care, The Second Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, P.R. China, Department of Medicine, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, P.R. China, Department of Hematology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, P.R. China, Department of Hematology, Shandong Province Hospital of Shandong University, Jinan, P.R. China, Department of Traditional Chinese Medicine, Linyi People's Hospital, Linyi, P.R. China, Department of Chinese Integrative Medicine, Qingdao Cancer Hospital, Qingdao, Shandong, P.R. China
Published online on: August 13, 2014 https://doi.org/10.3892/ijmm.2014.1898
Pages: 1309-1314

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Abstract

The present study was primarily undertaken to examine the hypothesis that mitochondrial DNA (mtDNA) mutations and telomere length may be associated with aplastic anemia (AA). Our study included a single institution analysis of 40 patients presenting with AA first diagnosed at the Affiliated Hospital of Shandong, University of Traditional Chinese Medicine between 2010 and 2013. Bone marrow and oral epithelial samples were collected from patients with AA (n=40) for mtDNA mutation and telomere length determinations. Bone marrow specimens were collected from 40 healthy volunteers as controls for the examination of telomere length. The mitochondrial genome was amplified by polymerase chain reaction (PCR), and the products were used for sequencing and analysis. We detected 146 heteroplasmic mutations in 18 genes from 40 patients with AA, including 39 silent mutations and 28 frameshift mutations. We used the gamma globin gene (HBG) as the control gene in real-time PCR to survey the relative telomere length measurements of the patients with AA and the healthy volunteers. Telomere length was expressed as the relative T/S value. We observed a negative correlation between the mtDNA non-silent mutation and the white blood cell (WBC) count, hemoglobin and platelet count. Of note, there was a positive correlation between the relative T/S value and WBC count, hemoglobin and platelet count, and a negative correlation between the non-silent mutation and the relative T/S value. We conclude that the functional impairment of the mitochondrial respiratory chain induced by mutation and telomere length shortening may play an important role in the process of hematopoietic failure in patients with AA. Additionally, mtDNA mutations and telomere length shortening influenced each other.

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