Ompenaclid

Positive biomarker data in patient aged 1-3 add to consistent, robust microdystrophin and transduction levels across all treated ages Patient aged 3 years at dosing had expression level at 122.3% compared to control With a differentiated novel construct and proactive short course immune modulation regimen, RGX-202 continues to demonstrate encouraging safety profile with no SAEs or AESIs Phase III portion of AFFINITY DUCHENNE® trial enrolling ambulatory patients aged 1 and above, on track for BLA submission mid-2026 ROCKVILLE, Md., March 19, 2025 /PRNewswire/ -- REGENXBIO Inc. (Nasdaq: RGNX) today reported new, positive interim data from two additional patients in the Phase I/II portion of the AFFINITY DUCHENNE® trial of RGX-202, a differentiated investigational gene therapy for Duchenne muscular dystrophy (Duchenne). Results were presented at the 2025 Muscular Dystrophy Association (MDA) Clinical & Scientific Conference. "RGX-202 is the only next generation gene therapy for Duchenne in a pivotal phase trial. The new data from the age 1-3 cohort builds on the favorable safety and efficacy profile seen in ages 4 and older and reinforces the potential of RGX-202 to serve a wide age range of patients," said Steve Pakola, M.D., Chief Medical Officer of REGENXBIO. "The consistent, robust microdystrophin levels seen across the age range as well as the functional improvements previously reported support RGX-202's potential to alter the course of this devastating disease. We look forward to sharing additional Phase I/II functional data in the first half of 2025. We also continue to rapidly advance the pivotal trial towards completing enrollment this year and BLA submission mid-2026." "Patients with Duchenne continue to be in need of treatment options that could meaningfully impact the course of disease," said Carolina Tesi-Rocha, M.D., Stanford Children's Hospital. "The microdystrophin expression and biomarker data presented represent key indicators of potential therapeutic effect. Combined with the safety and functional data to date, I am highly encouraged by the profile of RGX-202." AFFINITY DUCHENNE Phase I/II Interim Data Updates Biomarker Data New biomarker data from two patients who received the pivotal dose of RGX-202 were presented at MDA and continue to support consistent, robust expression and transduction of RGX-202 microdystrophin across all ages. In a patient aged 3 at dosing, microdystrophin expression was measured to be 122.3% compared to control. Patients under 4 years old have no access to gene therapy, and REGENXBIO is the only gene therapy sponsor recruiting patients in this age group in the U.S. In a patient aged 7 years old, RGX-202 microdystrophin expression was measured to be 31.5% compared to control. In all patients, RGX-202 was appropriately localized to the sarcolemma, demonstrating the differentiated construct with the CT-Domain is appropriately targeting the muscle. RGX-202 microdystrophin expression results in ambulatory patients aged 8+ are the highest reported microdystrophin levels across approved or investigational gene therapies. To support a Biologics License Application (BLA) using the accelerated approval pathway, the primary endpoint in the pivotal phase of AFFINITY DUCHENNE is the proportion of participants whose RGX-202 microdystrophin expression is ≥10% at Week 12. RGX-202 also continues to demonstrate the highest reported vector genome copies (4.9-55.4) measured by qPCR across approved or investigational gene therapies. Safety and Tolerability Data As of February 21, 2025, RGX-202 was well tolerated with no serious adverse events (SAEs) and no AEs of special interest (AESIs). Common drug-related AEs included nausea, vomiting and fatigue. All resolved and are typically anticipated with gene therapy administration. A thorough, proactive, short-course immune modulation regimen in combination with industry-leading product purity levels of more than 80% full capsids may contribute to the favorable safety profile seen in patients receiving RGX-202 to date. As reported in November 2024, the first five participants in the Phase I/II portion of the AFFINITY DUCHENNE trial all showed functional improvements that exceeded external natural history controls, demonstrating evidence of RGX-202 positively impacting disease trajectory. (press release). Patients demonstrated stable or improved function on the North Star Ambulatory Assessment (NSAA) and timed function tests. REGENXBIO plans to share additional interim functional data in the first half of 2025. About RGX-202 RGX-202 is a potential best-in-class investigational gene therapy designed for improved function and outcomes in Duchenne. RGX-202 is the only gene therapy approved or in late-stage development for Duchenne with a differentiated microdystrophin construct that encodes key regions of naturally occurring dystrophin, including the C-Terminal (CT) domain. In preclinical studies, the CT domain has been shown to protect the muscle from contraction-induced stress and improve its ability to repair itself. Additional design features may potentially improve gene expression, increase protein translation efficiency and reduce immunogenicity. RGX-202 is designed to support the delivery and targeted expression of microdystrophin throughout skeletal and heart muscle using the NAV® AAV8 vector and a well-characterized muscle-specific promoter (Spc5-12). RGX-202 is manufactured using REGENXBIO's proprietary, high-yielding NAVXpress™ suspension-based platform process. About Duchenne Muscular Dystrophy Duchenne is a severe, progressive, degenerative muscle disease, affecting 1 in 3,500 to 5,000 boys born each year worldwide. Duchenne is caused by mutations in the Duchenne gene which encodes for dystrophin, a protein involved in muscle cell structure and signaling pathways. Without dystrophin, muscles throughout the body degenerate and become weak, eventually leading to loss of movement and independence, required support for breathing, cardiomyopathy and premature death. ABOUT REGENXBIO Inc. REGENXBIO is a biotechnology company on a mission to improve lives through the curative potential of gene therapy. Since its founding in 2009, REGENXBIO has pioneered the field of AAV gene therapy. REGENXBIO is advancing a late-stage pipeline of one-time treatments for rare and retinal diseases, including RGX-202 for the treatment of Duchenne; clemidsogene lanparvovec (RGX-121) for the treatment of MPS II and RGX-111 for the treatment of MPS I, both in partnership with Nippon Shinyaku; and surabgene lomparvovec (ABBV-RGX-314) for the treatment of wet AMD and diabetic retinopathy, in collaboration with AbbVie. Thousands of patients have been treated with REGENXBIO's AAV platform, including those receiving Novartis' ZOLGENSMA®. REGENXBIO's investigational gene therapies have the potential to change the way healthcare is delivered for millions of people. For more information, please visit . FORWARD-LOOKING STATEMENTS This press release includes "forward-looking statements," within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These statements express a belief, expectation or intention and are generally accompanied by words that convey projected future events or outcomes such as "believe," "may," "will," "estimate," "continue," "anticipate," "assume," "design," "intend," "expect," "could," "plan," "potential," "predict," "seek," "should," "would" or by variations of such words or by similar expressions. The forward-looking statements include statements relating to, among other things, REGENXBIO's future operations, clinical trials, costs and cash flow. REGENXBIO has based these forward-looking statements on its current expectations and assumptions and analyses made by REGENXBIO in light of its experience and its perception of historical trends, current conditions and expected future developments, as well as other factors REGENXBIO believes are appropriate under the circumstances. However, whether actual results and developments will conform with REGENXBIO's expectations and predictions is subject to a number of risks and uncertainties, including the timing of enrollment, commencement and completion and the success of clinical trials conducted by REGENXBIO, its licensees and its partners, the timing of commencement and completion and the success of preclinical studies conducted by REGENXBIO and its development partners, the timing or likelihood of payments from AbbVie or Nippon Shinyaku, the monetization of any priority review voucher, the timely development and launch of new products, the ability to obtain and maintain regulatory approval of product candidates, the ability to obtain and maintain intellectual property protection for product candidates and technology, trends and challenges in the business and markets in which REGENXBIO operates, the size and growth of potential markets for product candidates and the ability to serve those markets, the rate and degree of acceptance of product candidates, and other factors, many of which are beyond the control of REGENXBIO. Refer to the "Risk Factors" and "Management's Discussion and Analysis of Financial Condition and Results of Operations" sections of REGENXBIO's Annual Report on Form 10-K for the year ended December 31, 2024, which will be filed with the U.S. Securities and Exchange Commission (SEC) in the first quarter of 2025, and comparable "risk factors" sections of REGENXBIO's Quarterly Reports on Form 10-Q and other filings, which have been filed with the SEC and are available on the SEC's website at . All of the forward-looking statements made in this press release are expressly qualified by the cautionary statements contained or referred to herein. The actual results or developments anticipated may not be realized or, even if substantially realized, they may not have the expected consequences to or effects on REGENXBIO or its businesses or operations. Such statements are not guarantees of future performance and actual results or developments may differ materially from those projected in the forward-looking statements. Readers are cautioned not to rely too heavily on the forward-looking statements contained in this press release. These forward-looking statements speak only as of the date of this press release. Except as required by law, REGENXBIO does not undertake any obligation, and specifically declines any obligation, to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. Zolgensma® is a registered trademark of Novartis Gene Therapies. All other trademarks referenced herein are registered trademarks of REGENXBIO. CONTACTS: Dana Cormack Corporate Communications [email protected] George E. MacDougall Investor Relations [email protected] SOURCE REGENXBIO Inc. 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Merck KGaA on Thursday reported its annual results for 2024, although investors eager for an update on a potential deal with SpringWorks Therapeutics were left frustrated. The German drugmaker simply reaffirmed that it is in advanced discussions about a possible acquisition of SpringWorks, although there is no certainty that an agreement will be signed. Rumours of a transaction between the parties first surfaced on February 10, with Merck confirming later the same day that talks were ongoing. A purchase of SpringWorks would give Merck the oral gamma secretase inhibitor Ogsiveo (nirogacestat), which is approved for desmoid tumours, as well as the MEK inhibitor mirdametinib, currently under review by the FDA for neurofibromatosis type 1-associated plexiform neurofibromas.The acquisition of SpringWorks would revitalise Merck's pipeline, following a number of recent setbacks, including the failure of a pair of Phase III studies for its lead oncology candidate xevinapant. While the company's healthcare segment posted 5% growth last year to €8.5 billion ($9.2 billion), driven by oncology — which was up 10.5% to €2 billion — it is heavily reliant on its 20-year-old drug Erbitux.Erbitux biosimilars on the horizonThe anti-EGFR monoclonal antibody generated sales in 2024 of €1.2 billion, up 13.3% over the prior year. Merck noted that growth for Erbitux was led by Latin America, particularly Mexico, as well as Europe and China, tempered by negative pricing effects in Japan.Asked on an analyst call about the growth potential of Erbitux, particularly in China, Peter Guenter — CEO of Merck's healthcare unit — noted that sales of the product are forecast to increase this year, with biosimilars not expected to launch before 2026. Guenter indicated that China, which accounts for about 25% of Erbitux revenue, is "an important growth driver, but actually the brand is very dynamic across the world."While Erbitux faces competition in China from Simcere Pharmaceutical's Enlituo, Guenter clarified that the product — approved last June — is not classified as a biosimilar, but rather a non-comparable biologic. "And that has, of course, relatively important implications in terms of, you know, lack of substitution," Guenter explained, as well as inclusion on the reimbursement drug list and volume-based procurement programme.Merck's other key drug, the multiple sclerosis (MS) therapy Mavenclad, achieved blockbuster status in 2024 for the first time, posting an 11.1% increase in revenue to €1.1 billion. Meanwhile, its older MS treatment Rebif declined 11.6% to €626 million in line with the wider interferon market.For the current year, the firm expects sales in its healthcare unit to be between €8.3 billion and €8.9 billion, representing organic growth of up to 5%.Pipeline questions continueMerck also disclosed Thursday that the oral TLR7/8 inhibitor enpatoran failed to meet the primary endpoint of the systemic lupus erythematosus cohort of the mid-stage WILLOW study. Despite what Guenter called "a near miss" in the trial, the company plans further development of the drug, given "promising responses" in patient subgroups and the totality of data, including positive results from the cutaneous lupus erythematosus arm of WILLOW.Guenter explained "the good news is that we see clear responses in predefined subpopulations. So we can really say that the drug clearly hits the target." These subgroups include patients with skin manifestations within the lupus cluster, those with a strong interferon gene signature and also those with high steroid use at baseline.Meanwhile, chief financial officer Helene von Roeder noted that Inspirna "informed [us] about negative top-line data" from an ongoing Phase II trial of ompenaclid in RAS-mutated advanced or metastatic colorectal cancer. The SLC6A8 inhibitor — also known as RGX-202 — was the focus of a licensing agreement between the parties last year. However, von Roeder indicated that the mid-stage failure means "we will not exercise the US option" on the drug, but will instead record an impairment charge of around €15 million in the current quarter.