Making RNAi work in therapeutic application is tricky, and here, Derek Lowe reports on a paper published in Nature last week that does a good job demonstrating just how much researchers don't know. They used RNAi to knock down VEGF, whose overactivation leads to macular degeneration.

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The Atlantic reports that genetic counselors are coping with an influx of patients seeking advice on their direct-to-consumer genetic test results.

A small study finds differences between three genomic prostate cancer tests, Medscape reports.

In Nature this week: shared genetic architecture for asthma and allergic diseases, and more.

A survey of Canadians finds them to be divided on genetically modified food, the Ottawa Citizen reports.