LX2931 Phase 2 Data to be Presented at the American College of Rheumatology Conference

THE WOODLANDS, Texas, Nov. 9, 2011 /PRNewswire/ -- Lexicon Pharmaceuticals, Inc. (Nasdaq: LXRX), a biopharmaceutical company focused on discovering breakthrough treatments for human disease, announced today that Dr. Roy Fleischmann from the University of Texas Southwestern Medical Center will be presenting data from Lexicon's LX2931 Phase 2 proof-of-concept clinical trial at the annual meeting of the American College of Rheumatology on Wednesday, November 9, 2011 in Chicago, Illinois.  LX2931 is an orally-administered small molecule designed to inhibit sphingosine-1-phosphate lyase (S1P), an enzyme in a pathway known to be important in regulating the immune response.  

Results from the Phase 2a study demonstrated a favorable safety profile at all doses tested and suggested that patients with rheumatoid arthritis treated with 150 mg of LX2931 once daily showed improvement in the primary efficacy endpoint of the study, the percentage of patients achieving an American College of Rheumatology 20 (ACR20) response at week 12.

For more information on this program or to download a copy of the presentation, please visit www.lexpharma.com.

About Lexicon

Lexicon is a biopharmaceutical company focused on discovering breakthrough treatments for human disease.  Lexicon currently has four drug programs in mid-stage development for diabetes, irritable bowel syndrome, carcinoid syndrome and rheumatoid arthritis, all of which were discovered by Lexicon's research team.  Lexicon has used its proprietary gene knockout technology to identify more than 100 promising drug targets.  Lexicon has focused drug discovery efforts on these biologically-validated targets to create its extensive pipeline of clinical and preclinical programs.  For additional information about Lexicon and its programs, please visit www.lexpharma.com.

Safe Harbor Statement

This press release contains "forward-looking statements," including statements relating to Lexicon's clinical development of LX2931, including characterizations of the results of and projected timing of clinical trials of LX2931, and the potential therapeutic and commercial potential of LX2931. This press release also contains forward-looking statements relating to Lexicon's growth and future operating results, discovery and development of products, strategic alliances and intellectual property, as well as other matters that are not historical facts or information.  All forward-looking statements are based on management's current assumptions and expectations and involve risks, uncertainties and other important factors, specifically including those relating to Lexicon's ability to successfully conduct clinical development of LX2931 and preclinical and clinical development of its other potential drug candidates, advance additional candidates into preclinical and clinical development, obtain necessary regulatory approvals, achieve its operational objectives, obtain patent protection for its discoveries and establish strategic alliances, as well as additional factors relating to manufacturing, intellectual property rights, and the therapeutic or commercial value of its drug candidates, that may cause Lexicon's actual results to be materially different from any future results expressed or implied by such forward-looking statements.  Unless specifically indicated otherwise, results were not statistically significant. Information identifying such important factors is contained under "Risk Factors" in Lexicon's annual report on Form 10-K for the year ended December 31, 2010, as filed with the Securities and Exchange Commission.  Lexicon undertakes no obligation to update or revise any such forward-looking statements, whether as a result of new information, future events or otherwise.

SOURCE Lexicon Pharmaceuticals, Inc.