By Bernadette Toner and Turna Ray

SAN FRANCISCO — A Novartis official said yesterday that the company has identified a genetic marker that it plans to market as a companion diagnostic for a COX-2 inhibitor that was previously withdrawn from several non-US markets due to liver toxicity issues.

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The US Food and Drug Administration has new guidelines that enable some gene and cell therapies to undergo expedited review, according to the New York Times.

Using gene drives to control invasive species might be too risky, an initial advocate of the approach says.

Researchers have grown tumors in 3D cell cultures to better understand cancer, the Economist reports.

In Science this week: intellectual property experts argue patent battles such as the one over CRISPR are wasteful, and more.