Mitochondrial haplogroup H1 and ischemic stroke risk
Author Information
Author(s): Rosa Alexandra, Fonseca Benedita V, Krug Tiago, Manso Helena, Gouveia Liliana, Albergaria Isabel, Gaspar Gisela, Correia Manuel, Viana-Baptista Miguel, Simões Rita Moiron, Pinto Amélia Nogueira, Taipa Ricardo, Ferreira Carla, Fontes João Ramalho, Silva Mário Rui, Gabriel João Paulo, Matos Ilda, Lopes Gabriela, Ferro José M, Vicente Astrid M, Oliveira Sofia A
Primary Institution: Instituto Gulbenkian de Ciência, Oeiras, Portugal
Hypothesis
Does mitochondrial DNA variation influence the risk of ischemic stroke in Portuguese patients?
Conclusion
Mitochondrial haplogroup H1 appears to reduce the risk of ischemic stroke in a Portuguese population.
Supporting Evidence
- Haplogroup H1 was significantly less frequent in stroke patients than in controls.
- The pre-HV/HV and U haplogroups were associated with increased stroke risk.
- Specific SNPs in haplogroup H1 were found to influence ischemic stroke risk.
Takeaway
This study found that people with a specific type of mitochondrial DNA, called haplogroup H1, are less likely to have a stroke.
Methodology
The study genotyped 19 mtDNA SNPs in 534 ischemic stroke patients and 499 controls to assess their association with stroke risk.
Potential Biases
There may be risks of misclassification due to the age difference between cases and controls.
Limitations
The study may not account for all potential confounding factors and the sample size for some haplogroups was small.
Participant Demographics
534 ischemic stroke patients under 65 and 499 healthy controls, with a higher mean age in controls.
Statistical Information
P-Value
0.001
Confidence Interval
0.45–0.83
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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