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Case Report

A novel heteroplasmic mitochondrial DNA mutation, A8890G, in a patient with juvenile‑onset metabolic syndrome: A case report

  • Authors:
    • Wei Ye
    • Saihui Chen
    • Sheng Jin
    • Jianxin Lu
  • View Affiliations / Copyright

    Affiliations: Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang 325035, P.R. China
  • Pages: 1060-1066
    |
    Published online on: August 6, 2013
       https://doi.org/10.3892/mmr.2013.1616
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Abstract

Metabolic syndrome (MS) is a complex disorder characterized by a group of metabolic abnormalities. In the present study, the case of an 18‑year‑old male who presented with MS characteristics with central obesity (overweight and a waist circumference of 95 cm) and dyslipidemia (high TG, low HDL levels and low apoA‑I/apoB‑100) was reported. The patient's family has maternally inherited diabetes and a number of the patient's maternal relatives present MS features. For the investigation of the mitochondrial DNA variants in the patient and the patient's family, genomic DNA of all the family members were extracted from peripheral blood using routine methods. Amplification of mitochondrial DNA in 24 overlapping fragments by PCR, direct sequencing and denaturing high‑performance liquid chromatography was utilized for genetic analysis. Sequences were compared to the reference sequence to identify variants. Bioinformatic methods and databases were used to analyze conservation of the variants and to predict the protein secondary structure. With the exception of the patient, five relatives were diagnosed with MS. Moreover, 5 of the 8 family members had been diagnosed with diabetes, hearing loss and mild kidney impairment according to serum biochemical analysis. Further molecular genetic analysis indicated that the MS‑associated variant T16189C was detected in this family. Notably, a heteroplasmic mutation A8890G was detected in the patient in the mitochondrial ATP6 gene, which codes the ATP synthase subunit 6 (ATPase6). A8890G changed the highly conserved ATPase6 Lys122 into Glu122 in the mitochondrial inner membrane. However, this mutation was not detected in other family members. In conclusion, the mutation A8890G may affect the function of ATPase 6 and the production of ATP, thus contributing to juvenile‑onset MS. It was not detected in other family members possibly due to the mitochondrial genetic segregation or production of a new germline mutation in the juvenile‑onset patient.
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Copy and paste a formatted citation
Spandidos Publications style
Ye W, Chen S, Jin S and Lu J: A novel heteroplasmic mitochondrial DNA mutation, A8890G, in a patient with juvenile‑onset metabolic syndrome: A case report. Mol Med Rep 8: 1060-1066, 2013.
APA
Ye, W., Chen, S., Jin, S., & Lu, J. (2013). A novel heteroplasmic mitochondrial DNA mutation, A8890G, in a patient with juvenile‑onset metabolic syndrome: A case report. Molecular Medicine Reports, 8, 1060-1066. https://doi.org/10.3892/mmr.2013.1616
MLA
Ye, W., Chen, S., Jin, S., Lu, J."A novel heteroplasmic mitochondrial DNA mutation, A8890G, in a patient with juvenile‑onset metabolic syndrome: A case report". Molecular Medicine Reports 8.4 (2013): 1060-1066.
Chicago
Ye, W., Chen, S., Jin, S., Lu, J."A novel heteroplasmic mitochondrial DNA mutation, A8890G, in a patient with juvenile‑onset metabolic syndrome: A case report". Molecular Medicine Reports 8, no. 4 (2013): 1060-1066. https://doi.org/10.3892/mmr.2013.1616
Copy and paste a formatted citation
x
Spandidos Publications style
Ye W, Chen S, Jin S and Lu J: A novel heteroplasmic mitochondrial DNA mutation, A8890G, in a patient with juvenile‑onset metabolic syndrome: A case report. Mol Med Rep 8: 1060-1066, 2013.
APA
Ye, W., Chen, S., Jin, S., & Lu, J. (2013). A novel heteroplasmic mitochondrial DNA mutation, A8890G, in a patient with juvenile‑onset metabolic syndrome: A case report. Molecular Medicine Reports, 8, 1060-1066. https://doi.org/10.3892/mmr.2013.1616
MLA
Ye, W., Chen, S., Jin, S., Lu, J."A novel heteroplasmic mitochondrial DNA mutation, A8890G, in a patient with juvenile‑onset metabolic syndrome: A case report". Molecular Medicine Reports 8.4 (2013): 1060-1066.
Chicago
Ye, W., Chen, S., Jin, S., Lu, J."A novel heteroplasmic mitochondrial DNA mutation, A8890G, in a patient with juvenile‑onset metabolic syndrome: A case report". Molecular Medicine Reports 8, no. 4 (2013): 1060-1066. https://doi.org/10.3892/mmr.2013.1616
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