Lexicon Enrolls First Patient in Phase 2b Progress Study of LX9211 in Diabetic Peripheral Neuropathic Pain (DPNP)

The PROGRESS study marks initiation of the late-stage development program for AAK1 inhibitor LX9211, with potential to become the first new, non-opioid drug therapy in high-unmet need neuropathic pain in more than 20 years

LX9211 has previously received Fast Track designation from the U.S. Food and Drug Administration (FDA) for DPNP

THE WOODLANDS, Texas, Nov. 30, 2023 (GLOBE NEWSWIRE) — Lexicon Pharmaceuticals, Inc. (Nasdaq: LXRX) today announced that it has enrolled the first patient in PROGRESS (A Phase 2b, Dose-ranging, Randomized, Double-blind, PlacebO-controlled, Parallel-GRoup, MulticEnter Study with an Open-label Extension in PatientS with Diabetic Peripheral Neuropathic Pain) studying LX9211, a potent, orally-delivered, selective, investigational small molecule inhibitor of adaptor-associated kinase 1 (AAK1).

PROGRESS will enroll adult patients with a diagnosis of type 1 diabetes mellitus (T1DM) or type 2 diabetes mellitus (T2DM) with moderate to severe DPNP. The primary endpoint of PROGRESS is a reduction of Average Daily Pain Score (ADPS), consistent with the primary endpoint achieved in the successful RELIEF-DPN-1 Phase 2a proof-of-concept study and, informed by regulatory feedback, the primary endpoint planned for Phase 3 studies of LX9211 in DPNP. The placebo-controlled treatment period of PROGRESS is intended to identify the optimal dosing for Phase 3 studies. The open-label extension is expected to run in parallel with planned next-stage Phase 3 studies, supporting long-term safety requirements for regulatory approval.

“We are excited about the potential for LX9211 to become a safe and effective treatment for DPNP and pleased to be moving this promising drug candidate into late-stage development with the initiation of PROGRESS,” said Craig Granowitz, M.D., Ph.D., Lexicon’s senior vice president and chief medical officer. “With no new, non-opioid drugs having been approved for the treatment of neuropathic pain in over two decades, this is an area where novel treatment options are urgently needed. We thank the study sites and especially the patients for their participation in this important scientific endeavor.”

Topline data from PROGRESS is expected to be announced in Q2 2025.

LX9211 has previously received Fast Track designation from the FDA for development in DPNP.

About Lexicon Pharmaceuticals

Lexicon is a biopharmaceutical company with a mission of pioneering medicines that transform patients’ lives. Through its Genome5000™ program, Lexicon scientists studied the role and function of nearly 5,000 genes and identified more than 100 protein targets with significant therapeutic potential in a range of diseases. Through the precise targeting of these proteins, Lexicon is pioneering the discovery and development of innovative medicines to treat diseases safely and effectively. Lexicon has advanced multiple medicines to market and has a pipeline of promising drug candidates in heart failure, neuropathic pain, diabetes and metabolism and other indications. For additional information, please visit www.lexpharma.com.

About LX9211

Discovered using Lexicon’s unique approach to gene science, LX9211 is a potent, orally delivered, selective, investigational small molecule inhibitor of adaptor-associated kinase 1 (AAK1). Lexicon identified AAK1 in its target discovery efforts as a promising approach for the treatment of neuropathic pain and identified LX9211 and another development candidate in a neuroscience drug discovery alliance with Bristol-Myers Squibb from which Lexicon holds exclusive development and commercialization rights. Preclinical studies of LX9211 demonstrated central nervous system penetration and reduction in pain behavior in models of neuropathic pain without affecting opiate pathways. LX9211 has received Fast Track designation from the U.S. Food and Drug Administration for development in diabetic peripheral neuropathic pain.

Safe Harbor Statement

This press release contains “forward-looking statements,” including statements relating to the therapeutic and commercial potential, research and clinical development and regulatory status of LX9211. In addition, this press release also contains forward looking statements relating to Lexicon’s financial position and long-term outlook on its business, 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 Lexicon’s ability to meet its capital requirements, successfully commercialize INPEFA^® (sotagliflozin) in heart failure on the timeline and/or at the prices currently contemplated or at all, conduct preclinical and clinical development and obtain necessary regulatory approvals of INPEFA (in other indications), LX9211 and its other drug candidates on its anticipated timelines, 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. Any of these risks, uncertainties and other factors may cause Lexicon’s actual results to be materially different from any future results expressed or implied by such forward-looking statements. 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, 2022 and other subsequent disclosure documents 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.

For Investor Inquiries:
Lisa DeFrancesco
Lexicon Pharmaceuticals, Inc.
lexinvest@lexpharma.com

For Media Inquiries:
Alina Cocuzza
Lexicon Pharmaceuticals, Inc.
acocuzza@lexpharma.com