Genetic testing may be even worse than flat screens when it comes to the speed at which they become out of date. Last fall, I took a genetic test for a recently identified genetic variation linked to a significantly increased risk of type 2 diabetes. With a family history of the disease and other risk factors, I was curious about my own genetic status. Fortunately, I didn’t have that high-risk allele–but given my family history, I likely have other disease-linked variants.
At the Beyond Genome conference in San Francisco yesterday, I discovered that the test I took a year ago now screens for four genetic variants that boost risk for the disease. Those new additions are part of a flood of genome-wide association screens that have been reported over the past year. The rate may slow down as variants with the biggest impact on common diseases are identified.
The test I took was focused on a single disease, type 2 diabetes. Genome-wide screens, such as those offered by Navigenics, DeCode, and 23andMe, offer updates–either included in the initial fee or for an annual subscription–to their customers as additional information becomes available.
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