Arrowhead Research this week announced that it has received clearance from regulators in Hong Kong to begin a phase IIa trial of its siRNA-based hepatitis B treatment ARC-520.

The single-dose, dose-escalation trial is designed to determine the drug's ability to suppress hepatitis B surface antigen in combination with the oral antiviral agent entecavir in chronic HBV patients.

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In Nature this week: omic analysis of permafrost microbes, hookworm genome, and more.

Biologists turn to environmental DNA sampling to determine whether elusive or invasive species are shedding DNA in a given area.

Rob Knight writes at Scientific American that microbiome studies are about to break out of the laboratory.

Harold Varmus, the director of the National Cancer Institute, has announced that he is stepping down after nearly five years.