Mueller 2012 PLoS One
| Mueller EE, Brunner SM, Mayr JA, Stanger O, Sperl W, Kofler B (2012) Functional differences between mitochondrial haplogroup T and haplogroup H in HEK293 cybrid cells. PLoS One 7:e52367. |
Mueller EE, Brunner SM, Mayr JA, Stanger O, Sperl W, Kofler B (2012) PLoS One
Abstract: Epidemiological case-control studies have revealed associations between mitochondrial haplogroups and the onset and/or progression of various multifactorial diseases. For instance, mitochondrial haplogroup T was previously shown to be associated with vascular diseases, including coronary artery disease and diabetic retinopathy. In contrast, haplogroup H, the most frequent haplogroup in Europe, is often found to be more prevalent in healthy control subjects than in patient study groups. However, justifications for the assumption that haplogroups are functionally distinct are rare. Therefore, we attempted to compare differences in mitochondrial function between haplogroup H and T cybrids.
Mitochondrial haplogroup H and T cybrids were generated by fusion of HEK293 cells devoid of mitochondrial DNA with isolated thrombocytes of individuals with the respective haplogroups. These cybrid cells were analyzed for oxidative phosphorylation (OXPHOS) enzyme activities, mitochondrial DNA (mtDNA) copy number, growth rate and susceptibility to reactive oxygen species (ROS). We observed that haplogroup T cybrids have higher survival rate when challenged with hydrogen peroxide, indicating a higher capability to cope with oxidative stress.
The results of this study show that functional differences exist between HEK293 cybrid cells which differ in mitochondrial genomic background.
• O2k-Network Lab: AT Salzburg Sperl W
Labels: MiParea: Respiration, mtDNA;mt-genetics
Stress:Oxidative stress;RONS Organism: Human Tissue;cell: Blood cells, HEK Preparation: Intact cells
Coupling state: OXPHOS
