Affordable genetic testing continues to enable scientists to find exciting new discoveries that may help doctors predict, prevent, and treat disease. Two teams of researchers recently published in Nature Genetics (a Japanese team from Kobe University, and a US team from NIH) have collaborated to find that five important genetic variants are linked to Parkinson’s. This debilitating brain disease degrades muscle control through a reduction in brain chemicals and affects 1-2% of those over 65. This research was the largest case of genetic testing for Parkinson’s, ever. With the amount of genetic data that can now be processed quickly and cheaply, studies like these are just the beginning.

These two Genome Wide Association Studies (GWAS) rely on finding important comparisons of single nucleotide polymorphisms (SNPs). 23andMe declared war on Parkinson’s by analyzing SNPs one individual at a time and hope to gather 10,000+ samples total. These two GWAS, however,  have already examined the genetics of many thousands of volunteers. By sifting through this massive amount of data, scientists can glean which genetic markers may indicate increased risks of the disease. It’s only been in the last few years that genetic testing has been cheap enough to facilitate such studies. As whole genome sequencing becomes cheaper, researchers will be able to study more DNA than just SNPs. This may lead to an even better understanding of the links between genes and illness. We live in a very exciting time – there is an ocean of data in our DNA that is going to be explored in the next few years.

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