Got a note from Harvard/MIT's George Church re: my story on personal genomics and 23andMe (he's on the 23andMe scientific advisory board and is quoted in the story).
Read MoreNice job on the article. Many of my colleagues agree. However some (including me) are concerned that the message about "œlimitations" of linkage-based chips is not coming through (despite the basic forthrightness of the first three Personal Genomics companies). The limitations are significant for research -- and even more so for diagnostics. Common diseases are not necessarily caused by common DNA variants – but also by DNA variants individually rare but collectively common. Associations can be statistically significant in a research population but have unacceptably high false positives and negatives in the individuals of that population. A good example is one of the oldest success stories in personal genomics -- BRCA1 & 2 which Myriad Genetics offers. Could those gene tests be done with any of the 3 new personal genomics chip assays? Probably not, since the causative alleles are “new†(i.e. less than 100,000 years old) and numerous. The causative alleles are not in linkage disequilibrium with the common alleles on the chips and hence require actual sequencing at Myriad. Despite the various limitations, early adopters may be richly rewarded by their insider-view if/when personal genomics takes off like personal computers. Thanks, --George