Home Gene Tests May Be Research Bonanza

June 27, 2010— -- Direct-to-consumer genetic tests can yield large amounts of quality data, potentially creating a new method for conducting genetic research, a new study shows.

A study conducted by a genetic test manufacturer, 23andMe, Inc., based in Mountain View, Calif., confirmed nine known gene associations and found four new ones, Nicholas Eriksson, the principal investigator at 23andMe, and colleagues reported online in the journal PLoS Genetics.

"In this paper, we confirm that self-reported data from our customers has the potential to yield data of comparable quality as data gathered using traditional research methods," Anne Wojcicki, president and co-founder of 23andMe, said in a statement.

"We are excited about moving scientific research forward, faster," she added.

Ten years after the mapping of the entire human genome, there's been rapid growth in genome-wide data. Yet much of human genetic variation remains entirely unexplained, the researchers said. That's partially due to challenges with the efficient and coordinated collection of genotype and phenotype data.

The gene-test maker's customer database included about 10,000 participants who were given the option of contributing phenotype data via web-based surveys. So rather than having to recruit cases and controls, the researchers thought they could instead correlate physical characteristics or disease status with voluntarily-contributed genetic data to find single nucleotide polymorphisms (SNPs) linked to a trait or condition.

To test the feasibility of this idea, the 23andMe team decided to assess 22 traits.

In addition to confirming several of these gene associations, they also found four novel SNP associations in hair curl, the photic sneeze reflex, freckling and asparagus anosmia.

For asparagus anosmia -- the inability to detect the scent of certain asparagus metabolites in the urine -- the researchers found a region on chromosome 1 containing a cluster of olfactory receptor genes significantly associated with the ability to smell asparagus metabolites.