This Week in PNAS

In the early, online edition of the Proceedings of the National Academy of Sciences, French researchers report on the interactions that two Lactobacillus bacteria (believed to have probiotic activity) have with the foodborne pathogen Listeria monocytogenes. In a mouse model of listeriosis infection, their array-based gene and microRNA expression profiling experiments indicate that treatment with Lactobacillus paracasei or L.

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CNN reports that researchers have tied a new variant to opioid addiction risk.

Organoids derived from patients' tumors may help determine what chemotherapy treatment patients would benefit from, according to New Scientist.

An initiative from GenomeAsia 100K hopes to increase the number of South Asians in genetic research, according to NBC News.

In Science this week: genomic analysis of ancient and modern horses indicates population turnover, and more.