title: The heteroplasmic 15059G>A mutation in the mitochondrial cytochrome b gene and essential hypertension in type 2 diabetes.
abstract: OBJECTIVE
  The long-term stress of high blood pressure levels increases the risk of a variety of macro- and microvascular complications of type 2 diabetes (T2D). The etiology of essential hypertension (EH) has been explored in depth, but the pathophysiology is multifactorial, complex, and poorly understood. Recent findings showed a role of inherited mutations in mitochondrial DNA (mtDNA) in maternally inherited forms of hypertension. However, an impact of somatic mtDNA mutations in the development of EH is significantly less investigated. In this study, we examined whether the level of heteroplasmy for the 15059G>A mutation in the mitochondrial cytochrome b gene is associated with EH in T2D.
  
  
  METHODS
  The heteroplasmy level in mtDNA isolated from blood of 189 diabetic participants randomly selected from general population (124 of whom had EH) was quantified using a real-time PCR.
  
  
  RESULTS
  The 15059G>A heteroplasmy exceeding 39% was found to be significantly associated with a higher risk of EH (odds ratio 1.96; P (Fisher) 0.032).
  
  
  CONCLUSIONS
  There is the first evidence reporting association between the mtDNA 15059G>A mutation heteroplasmy and EH in T2D.
authors.affiliation: Department of Molecular Diagnostics, National Research Center GosNIIgenetika, 117545 Moscow, Russia.
authors.forename: Alexey G
authors.initials: AG
authors.lastname: Nikitin
authors.forename: Elena Y
authors.initials: EY
authors.lastname: Lavrikova
authors.forename: Dimitry A
authors.initials: DA
authors.lastname: Chistiakov
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D045303:Cytochromes b / Q000235:genetics*; D004252:DNA Mutational Analysis; D004272:DNA, Mitochondrial / Q000235:genetics*; D003924:Diabetes Mellitus, Type 2 / Q000453:epidemiology / Q000235:genetics* / Q000503:physiopathology; D003925:Diabetic Angiopathies / Q000453:epidemiology / Q000235:genetics* / Q000503:physiopathology; D005260:Female; D006801:Humans; D006973:Hypertension / Q000453:epidemiology / Q000235:genetics* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D009031:Moscow / Q000453:epidemiology; D009154:Mutation; D018384:Oxidative Stress / Q000235:genetics*; D010375:Pedigree; D010641:Phenotype; D012307:Risk Factors
chemical_list: D004272:DNA, Mitochondrial; D045303:Cytochromes b