RADNOR, Pa.--The Wyeth-Ayerst Research Division of American Home Products has entered into a new pharmacogenomics alliance in the field of preclinical toxicology with Gene Logic. The two companies will collaborate using Gene Logic's proprietary gene expression and bioinformatics technologies and Wyeth's compounds and toxicology expertise to develop a database of gene expression profiles predictive of different classes of drug toxicity. The alliance expands and accelerates the development of Gene Logic's Toxicology EXPRESS database.