( Data Presented at Society for Biomolecu...)Lexicon-Genentech Collaboration Yields Potential Therapeutic,Targets,Health

THE WOODLANDS, Texas, April 18, 2007 /PRNewswire-FirstCall/ -- Lexicon Genetics Incorporated announced that data was presented today highlighting potential therapeutic targets related to its collaboration with Genentech, Inc. at the Society for Biomolecular Sciences 13th Annual Conference & Exhibition in Montreal, Canada. These target discoveries were made in a collaboration between Lexicon and Genentech that was initiated in December 2002 and expanded in November 2005 to advance the research, development and commercialization of new biologic drugs. Lexicon has developed antibodies for one of these targets, designated LG842, which it is now advancing through preclinical research.

Data presented today revealed that the deletion or neutralization of LG842, a circulating protein expressed predominantly in adipose tissue, placenta, pancreas and liver, resulted in lower triglycerides and cholesterol in in vivo models.

"Our in vivo studies, recently corroborated by human genetic data, have defined an important new pathway for potential treatments of dyslipidemia and metabolic disorders related to cardiovascular disease," commented Brian P. Zambrowicz, Ph.D., Lexicon's chief scientific officer. "We believe that our collaboration with Genentech has been enormously fruitful. We have been able to elucidate the function of a number of genes that have shown promise in important areas of medicine."

In preclinical studies, treatment with Lexicon's LG842 antibodies was shown to decrease plasma triglycerides and cholesterol. Lexicon has the option to choose six targets from the collaboration to advance into biotherapeutics drug discovery efforts. LG842 was one of the first two targets selected by Lexicon for internal development.

Gene Knockout Technology

Lexicon's proprietary technology allows scientists to create in vivo mode
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