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Researchers at Nanjing University have found miRNA signatures in blood serum, says an article in Tech Review. In work published in Cell Research, they sequenced miRNA in the blood of people with lung cancer, colorectal cancer, and diabetes and found specific expression patterns. "Whatever the reason, microRNAs are stable in the serum and are resistant to ribonuclease digestion," says lead author Chen-Yu Zhang.

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The US Department of Justice has proposed a rule change to enable DNA to be collected from migrants, the Associated Press reports.

Bernard Fisher, a surgeon who changed how breast cancer is treated, has died at 101, the New York Times reports.

Washington Post columnist writes that she is skeptical about DNA-based diets.

In PNAS this week: recurrent inactivation of DEPDC5 in gastrointestinal stromal tumors, taxonomic reliability of GenBank sequences, and more.