Automated medium- and high-throughput ion channel screening systems promise to jump start the search for ion channel modulating drugs, a vast and promising area of drug discovery. In Vivo Europe Rx looks at Sophion Bioscience, Nanion Technologies, and Xention Discovery, three emerging European firms whose platforms may help return ion channels to the forefront of biotech and pharmaceutical companies' discovery targets.

Historically ion channels have been among the most attractive targets for therapeutic intervention. But discovery of new ion channel drugs has come to a halt because ion channels are difficult to assay, require specialized tools and skills to study adequately, and have historically been impossible to study directly in high-throughput mode-the preferred style of the last decade. Now, a variety of automated assay technologies are coming on the market that should increase throughput, and some drug discovery companies have developed proprietary high-throughput methods for in-house use. With industry now interested more than ever in applying higher-throughput technologies to precedented targets, in a sense, ion channel discovery may become a beneficiary of the failures of genomics, combinatorial chemistry, and high-throughput screening.

The near-dormant global market for urinary incontinence treatments is poised to erupt in the second half of this decade-Novartis' recent acquisition of Pfizer's darifenacin introduces one more global player to the mix. But for existing and novel drug therapies to succeed in the fragmented and particularly underdeveloped European market companies must first recognize the challenges presented by cultural taboo and country-specific regulation.