A gene variant linked to active personality traits are also linked to human longevity. This derivative of a dopamine-receptor gene -- called the DRD4 7R allele -- appears in significantly higher rates in people more than 90 years old and is linked to lifespan increases in mouse studies. People who carry this variant gene, Moyzis said, seem to be more motivated to pursue social, intellectual and physical activities. The variant is also linked to attention-deficit/hyperactivity disorder and addictive and risky behaviors. "While the genetic variant may not directly influence longevity," Moyzis said, "it is associated with personality traits that have been shown to be important for living a longer, healthier life. It is as simple as being social and being involved in physical activities." This is a really cool research topic, certain people that carry this gene have potential to live longer. While it's evident that the variant can contribute to longevity, Moyzis said further studies must take place to identify any immediate clinical benefits from the research. "However, it is clear that individuals with this gene variant are already more likely to be responding to the well-known medical adage to get more physical activity," he added. I think this is a useful finding for the people with this gene.
http://www.sciencedaily.com/releases/2013/01/130103151515.htm
How would one go about being tested for this gene? I think this is really cool, but I am also confused. If this gene is associated with "risky behaviors," wouldn't those behaviors actually shorten someone's life span? Also, has this gene been tested on any other animals, or been identified in actual humans? If this study can be proven true I think this is a huge step in man kind. Every day we come discover new ways to lengthen our life spans, and I am very excited to see what new discoveries will be made in the future.
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