Through a genome-wide study, the research revealed two locations with strong links to early stroke risk.
people with blood types A are more likely to suffer a stroke before the age of 60 compared to other individuals with different blood types – advances a investigation. As the Science Alert website points out, blood types describe multiple chemical factors present in red blood cells of the blood.
Among the best known are the so-called A and Bwhich can appear together, as AB, separately, as A or B, or not be present at all, as O. However, even within these groups there are subtle variations caused by mutations in the responsible genes.
A scientific study published last year showed a relationship between the A1 subgroup gene and the likelihood of a Early strokethat is, before 60 years.
During the investigation, the scientists compiled data referring to 48 studies genetic tests, which included information on 17 thousand people who had already suffered from strokes and 600 thousand people who did not suffer from these episodes — all participants being between 19 and 59 years old.
Through a genome study, the research revealed two locations with strong links to early stroke risk.
One coincided with local where are the genes for blood type. A second analysis of specific types of blood type genes came to a person whose encoded genome for a variation group A had a 16 percent greater likelihood of an early stroke compared to the population of other blood types.
Individuals with the gene for the group O1the risk was 12% lower.
However, the researchers pointed out that the increased risk of early stroke in people with A blood types is small, so there is no need for a extra surveillance or more frequent analyses.
“We still don’t know why type A blood confers a higher risk,” he admitted. Steven Kittner, author and vascular neurologist at the University of Maryland. “But it probably has something to do with the blood clotting factorssuch as platelets and the cells that line blood vessels, as well as other circulating proteins, as they all play a role in the development of blood clots“.
Despite the discovery apparently alarming, it is important to put these numbers in perspective. Every year in the United States of America, less than 800,000 people suffer strokes. Most occur in people aged 65 and over, with risks doubling every decade after the 55 years.
In addition, the study included people who lived in North America, Europe, Japan, Pakistan and Australia, with people of non-European descent only representing 35% of participants. As such, future investigations with a more diverse sample could help clarify the meaning of the results.
ZAP // 
