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Enlivex Announces Issuance of New Patent Application Covering the Use of Allocetra in Patients with Osteoarthritis

1. Enlivex received an Israeli patent for Allocetra™ in osteoarthritis treatment. 2. Clinical trial shows significant improvements in knee pain and function. 3. 72% pain reduction in age-related osteoarthritis patients demonstrates efficacy. 4. The patent secures intellectual property until at least 2040. 5. Osteoarthritis prevalence indicates a strong market opportunity for Enlivex.

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Why Bullish?

Positive trial results and patent issuance signal strong potential for growth. Companies with effective treatments often see stock price increases.

How important is it?

The issuance of a patent and positive trial data enhances Enlivex's market position. This is likely to increase investor confidence and interest in ENLV.

Why Long Term?

Success in clinical trials and patents could enhance Enlivex's market position over years. Historical examples show lasting impacts from successful product launches.

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September 09, 2025 08:00 ET  | Source: Enlivex Therapeutics Ltd Nes-Ziona, Israel, Sept. 09, 2025 (GLOBE NEWSWIRE) -- Enlivex Therapeutics Ltd. (Nasdaq: ENLV, the “Company”), a clinical-stage macrophage reprogramming immunotherapy company, today announced the issuance of an Israeli patent, numbered 290470, titled, “THERAPEUTIC APOPTOTIC CELLS FOR TREATMENT OF OSTEOARTHRITIS”. The patent will provide Enlivex with added intellectual property protection in Israel through at least 2040 with claims covering methods of using Allocetra™ to treat subjects with osteoarthritis. Enlivex recently reported positive three-month topline data from the Phase IIa stage of ENX-CL-05-001, a multi-center, two-stage Phase I/II double-blind, randomized, placebo-controlled clinical trial evaluating Allocetra™ in patients with moderate-to-severe knee osteoarthritis. In the overall modified intention-to-treat (mITT) population, improvements across all efficacy and secondary endpoints, including 24% reduction in knee pain and 26% improvement in knee function, were observed in the AllocetraTM treatment arm vs placebo; moreover, 72% reduction in knee pain and 109% improvement in knee function were observed for age-related primary osteoarthritis patients compared with placebo – a substantial, clinically meaningful and statistically significant effect in commonly used Phase III primary endpoints for knee osteoarthritis clinical trials. Oren Hershkovitz, Ph.D, CEO of Enlivex, commented, “We are very pleased to receive another patent issuance for the use of AllocetraTM as a potential treatment in patients with osteoarthritis. We believe that this issuance provides high assurance that we will be able to obtain similar patents in all major jurisdictions as part of our IP portfolio rollout.” ABOUT KNEE OSTEOARTHRITIS2 Osteoarthritis is by far the most common form of arthritis, affecting more than 32.5 million Americans and more than 300 million individuals worldwide. About half of knees with ACL injuries develop osteoarthritis within 5 to 15 years. 78 million Americans are projected to have osteoarthritis by the year 2040. Symptomatic knee osteoarthritis is particularly prevalent and disabling, with 40% of men and 47% of women developing knee osteoarthritis in their lifetimes. Osteoarthritis accounts for over one million hospitalizations annually in the United States, primarily for total joint replacement. The burden of osteoarthritis is enormous, and the need for treatments that reduce pain and attendant disability for persons with osteoarthritis is critical. There are currently no medications approved by either the U.S. Food and Drug Administration (FDA) or the European Medicines Agency (EMA) that have been demonstrated to arrest, slow or reverse progression of structural damage in the joint. ABOUT ENLIVEX Enlivex is a clinical stage macrophage reprogramming immunotherapy company developing Allocetra™, a universal, off-the-shelf cell therapy designed to reprogram macrophages into their homeostatic state. Resetting non-homeostatic macrophages into their homeostatic state is critical for immune system rebalancing and resolution of life-threatening and life debilitating conditions. For more information, visit https://enlivex.com/. Safe Harbor Statement: This press release contains forward-looking statements, which may be identified by words such as “expects,” “plans,” “projects,” “will,” “may,” “anticipates,” “believes,” “should,” “would,” “could,” “intends,” “estimates,” “suggests,” “has the potential to” and other words of similar meaning, including statements regarding expected cash balances, expected clinical trial results, market opportunities for the results of current clinical studies and preclinical experiments, the effectiveness of, and market opportunities for, ALLOCETRATM programs. All such forward-looking statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Investors are cautioned that forward-looking statements involve risks and uncertainties that may affect Enlivex’s business and prospects, including the risks that Enlivex may not succeed in generating any revenues or developing any commercial products; that the products in development may fail, may not achieve the expected results or effectiveness and/or may not generate data that would support the approval or marketing of these products for the indications being studied or for other indications; that ongoing studies may not continue to show substantial or any activity; and other risks and uncertainties that may cause results to differ materially from those set forth in the forward-looking statements. The results of clinical trials in humans may produce results that differ significantly from the results of clinical and other trials in animals. The results of early-stage trials may differ significantly from the results of more developed, later-stage trials. The development of any products using the ALLOCETRATM product line could also be affected by a number of other factors, including unexpected safety, efficacy or manufacturing issues, additional time requirements for data analyses and decision making, the impact of pharmaceutical industry regulation, the impact of competitive products and pricing and the impact of patents and other proprietary rights held by competitors and other third parties. In addition to the risk factors described above, investors should consider the economic, competitive, governmental, technological and other factors discussed in Enlivex’s filings with the Securities and Exchange Commission, including in the Company’s most recent Annual Report on Form 20-F filed with the Securities and Exchange Commission. The forward-looking statements contained in this press release speak only as of the date the statements were made, and we do not undertake any obligation to update forward-looking statements, except as required under applicable law. ENLIVEX CONTACT Shachar Shlosberger, CFOEnlivex Therapeutics, Ltd.shachar@enlivexpharm.com INVESTOR RELATIONS CONTACT Dave Gentry, CEORedChip Companies Inc.1-407-644-4256ENLV@redchip.com  1According to the OMERACT-OARSI criteria (Outcome Measures in Arthritis Clinical Trials-Osteoarthritis Research Society International) 2Source: The Arthritis Foundation, Disease modification in osteoarthritis; pathways to drug approval, Katz et. Al., Osteoarthritis and Cartilage Open (2) (2020)

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