This Week in PNAS

In this week's PNAS, research led by Stanford University scientists studied antibodies to β-amyloid (Aβ) proteins on a large scale. Using peptide arrays on plasma samples and cerebrospinal fluid of patients with Alzheimer's disease, they found natural antibodies against known toxic Aβ and amyloidogenic non-Aβ peptides and that these antibodies decrease with age and advancing Alzheimer's.

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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.