Chemomab Completes Successful End-of-Phase 2 Meeting and Aligns with FDA on Clear and Efficient Path to Potential Regulatory Approval for Nebokitug (CM-101) in Primary Sclerosing Cholangitis
Chemomab Therapeutics (Nasdaq: CMMB) has successfully completed its End-of-Phase 2 Meeting with the FDA, securing alignment on a single Phase 3 registration study design for nebokitug in Primary Sclerosing Cholangitis (PSC). The Phase 3 trial will require approximately 350 PSC patients and focus on time-to-first-event of well-characterized PSC clinical events, without requiring liver biopsies or additional confirmatory studies.
The streamlined approval pathway could potentially make nebokitug the first FDA-approved treatment for PSC. The trial design is supported by published PSC data linking biomarker improvements seen in the Phase 2 SPRING trial with reduced clinical events. The company expects to report topline data from the SPRING trial's open label extension by the end of Q1 and potentially launch the Phase 3 program before year-end.
The company is currently in discussions with potential strategic partners while preparing for the Phase 3 trial, which is estimated to require about two years for participants to experience clinically-meaningful events.
Chemomab Therapeutics (Nasdaq: CMMB) ha completato con successo il suo incontro di fine fase 2 con la FDA, ottenendo un allineamento su un unico design di studio di registrazione di fase 3 per nebokitug nella Colangite Sclerotizzante Primaria (PSC). Il trial di fase 3 richiederà circa 350 pazienti affetti da PSC e si concentrerà sul tempo fino al primo evento di eventi clinici ben caratterizzati della PSC, senza richiedere biopsie epatiche o ulteriori studi di conferma.
Il percorso di approvazione semplificato potrebbe potenzialmente rendere nebokitug il primo trattamento approvato dalla FDA per la PSC. Il design dello studio è supportato da dati pubblicati sulla PSC che collegano i miglioramenti dei biomarcatori osservati nel trial di fase 2 SPRING con eventi clinici ridotti. L'azienda prevede di riportare i dati principali dall'estensione in aperto del trial SPRING entro la fine del primo trimestre e potenzialmente di lanciare il programma di fase 3 prima della fine dell'anno.
L'azienda è attualmente in discussione con potenziali partner strategici mentre si prepara per il trial di fase 3, che si stima richiederà circa due anni affinché i partecipanti sperimentino eventi clinicamente significativi.
Chemomab Therapeutics (Nasdaq: CMMB) ha completado con éxito su reunión de fin de fase 2 con la FDA, asegurando un alineamiento sobre un único diseño de estudio de registro de fase 3 para nebokitug en Colangitis Esclerosante Primaria (PSC). El ensayo de fase 3 requerirá aproximadamente 350 pacientes con PSC y se centrará en el tiempo hasta el primer evento de eventos clínicos bien caracterizados de PSC, sin requerir biopsias hepáticas ni estudios de confirmación adicionales.
La vía de aprobación simplificada podría potencialmente convertir a nebokitug en el primer tratamiento aprobado por la FDA para la PSC. El diseño del ensayo está respaldado por datos publicados sobre la PSC que vinculan las mejoras en los biomarcadores observadas en el ensayo de fase 2 SPRING con la reducción de eventos clínicos. La empresa espera informar los datos principales de la extensión de etiqueta abierta del ensayo SPRING para finales del primer trimestre y potencialmente lanzar el programa de fase 3 antes de fin de año.
La empresa está actualmente en conversaciones con posibles socios estratégicos mientras se prepara para el ensayo de fase 3, que se estima que requerirá aproximadamente dos años para que los participantes experimenten eventos clínicamente significativos.
Chemomab Therapeutics (Nasdaq: CMMB)는 FDA와의 2상 종료 회의를 성공적으로 완료하고, nebokitug의 1건의 3상 등록 연구 설계에 대한 일치를 확보했습니다. 3상 임상시험은 약 350명의 PSC 환자를 필요로 하며, 간 생검이나 추가 확인 연구를 요구하지 않고 PSC 임상 사건의 첫 번째 사건까지의 시간을 중심으로 진행됩니다.
이 간소화된 승인 경로는 nebokitug가 PSC에 대해 FDA에서 승인된 최초의 치료제가 될 가능성이 있습니다. 연구 설계는 2상 SPRING 시험에서 관찰된 바이오마커 개선과 임상 사건 감소를 연결하는 PSC 데이터에 의해 뒷받침됩니다. 회사는 SPRING 시험의 개방형 확장에서 주요 데이터를 1분기 말까지 보고할 것으로 예상하며, 연말 전에 3상 프로그램을 시작할 수 있을 것으로 보입니다.
회사는 현재 3상 시험을 준비하면서 잠재적 전략적 파트너와 논의 중이며, 참가자들이 임상적으로 의미 있는 사건을 경험하는 데 약 2년이 걸릴 것으로 예상하고 있습니다.
Chemomab Therapeutics (Nasdaq: CMMB) a réussi à compléter sa réunion de fin de phase 2 avec la FDA, obtenant un alignement sur un seul design d'étude d'enregistrement de phase 3 pour nebokitug dans la Cholangite Sclérose Primaire (PSC). L'essai de phase 3 nécessitera environ 350 patients atteints de PSC et se concentrera sur le temps jusqu'au premier événement de bien caractérisés événements cliniques de PSC, sans nécessiter de biopsies hépatiques ou d'études de confirmation supplémentaires.
Le chemin d'approbation simplifié pourrait potentiellement faire de nebokitug le premier traitement approuvé par la FDA pour la PSC. Le design de l'essai est soutenu par des données publiées sur la PSC liant les améliorations des biomarqueurs observées dans l'essai SPRING de phase 2 à une réduction des événements cliniques. L'entreprise prévoit de rapporter les données principales de l'extension en ouvert de l'essai SPRING d'ici la fin du premier trimestre et pourrait potentiellement lancer le programme de phase 3 avant la fin de l'année.
L'entreprise est actuellement en discussions avec des partenaires stratégiques potentiels tout en se préparant pour l'essai de phase 3, qui devrait nécessiter environ deux ans pour que les participants expérimentent des événements cliniquement significatifs.
Chemomab Therapeutics (Nasdaq: CMMB) hat erfolgreich sein End-of-Phase-2-Meeting mit der FDA abgeschlossen und eine Übereinstimmung über ein einziges Design einer Phase-3-Registrierungsstudie für nebokitug bei der Primären Sklerosierenden Cholangitis (PSC) erzielt. Die Phase-3-Studie wird etwa 350 PSC-Patienten benötigen und sich auf die Zeit bis zum ersten Ereignis von gut charakterisierten PSC-Klinikevents konzentrieren, ohne Leberbiopsien oder zusätzliche Bestätigungsstudien zu erfordern.
Der vereinfachte Genehmigungsweg könnte nebokitug potenziell zur ersten von der FDA genehmigten Behandlung für PSC machen. Das Studiendesign wird durch veröffentlichte PSC-Daten unterstützt, die Verbesserungen von Biomarkern aus der Phase-2-SPRING-Studie mit reduzierten klinischen Ereignissen verknüpfen. Das Unternehmen erwartet, bis Ende des ersten Quartals die Hauptdaten aus der offenen Verlängerung der SPRING-Studie zu berichten und möglicherweise das Phase-3-Programm vor Jahresende zu starten.
Das Unternehmen befindet sich derzeit in Gesprächen mit potenziellen strategischen Partnern, während es sich auf die Phase-3-Studie vorbereitet, die voraussichtlich etwa zwei Jahre dauern wird, bis die Teilnehmer klinisch relevante Ereignisse erleben.
- FDA agreement on single Phase 3 trial design without need for additional confirmatory studies
- Potential to become first FDA-approved treatment for PSC
- No liver biopsies required for Phase 3 trial
- Phase 3 design supported by positive biomarker data from Phase 2 SPRING trial
- Phase 3 trial requires large patient enrollment (approximately 350)
- Extended trial duration (estimated 2 years) for meaningful clinical events
- Strategic partnership still pending
Insights
The FDA's agreement to Chemomab's innovative Phase 3 trial design for nebokitug represents a groundbreaking development in PSC drug development. This is the first time the FDA has accepted clinical events as primary endpoints for PSC treatment approval, marking a paradigm shift from traditional approaches that relied heavily on surrogate markers and liver biopsies.
The streamlined approval pathway through a single Phase 3 trial has several critical implications:
- Significant cost reduction and accelerated time-to-market by eliminating the need for additional confirmatory studies
- Lower patient burden and improved trial feasibility by avoiding invasive liver biopsies
- Potential for broader label claims based on disease progression events rather than narrow symptom-specific endpoints
The trial design is particularly derisked due to the correlation between nebokitug's Phase 2 biomarker improvements and published data linking these improvements to reduced clinical events. The planned enrollment of 350 patients with an estimated two-year event timeline suggests a well-powered study capable of demonstrating statistical significance.
The company's active discussions with potential strategic partners take on heightened significance given this regulatory clarity. For potential partners, the streamlined pathway reduces development costs and risks while potentially accelerating market entry. The PSC market represents a substantial opportunity, as it currently lacks any FDA-approved treatments for this progressive, often fatal liver disease.
The inclusion of interim analysis possibilities through biomarker data collection provides additional strategic flexibility and potential early indicators of efficacy. This could be particularly valuable for maintaining investor confidence during the extended trial period and potentially attracting strategic partnerships.
Single Positive Phase 3 Trial Designed to Support Full Regulatory Approval, For the First Time Providing Regulatory Clarity in PSC and Positioning Nebokitug to Potentially Become the First FDA-Approved Treatment for PSC
No Liver Biopsies or Additional Confirmatory Studies Required—Phase 3 Trial Endpoint Is Based on Well-Characterized Clinical Events Associated with PSC Disease Progression
Derisked Phase 3 Program Leverages Published PSC Data Associating Reductions in Clinical Events with the Types of Biomarker Improvements Seen in Nebokitug Phase 2 SPRING Trial
Advancing Discussions with Potential Strategic Partners Post-FDA Feedback While Preparing for Nebokitug Phase 3 Trial
TEL AVIV, Israel, Feb. 19, 2025 (GLOBE NEWSWIRE) -- Chemomab Therapeutics Ltd. (Nasdaq: CMMB) (Chemomab), a clinical stage biotechnology company developing innovative therapeutics for fibro-inflammatory diseases with high unmet need, today announced the successful completion of its End-of-Phase 2 Meeting with the U.S. Food and Drug Administration (FDA) and alignment with FDA on the design of a single Phase 3 registration study for its lead product candidate nebokitug (CM-101) for the treatment of primary sclerosing cholangitis (PSC). Nebokitug is the drug name recently assigned to CM-101 by the International Nonproprietary Names (INN) program of the World Health Organization.
“Successful completion of this major milestone is a huge achievement for Chemomab, for patients and for the larger community combatting PSC, a debilitating and often lethal disorder that has no FDA-approved therapies,” said Adi Mor, PhD, co-founder and Chief Executive Officer of Chemomab. “The design of our Phase 3 trial provides, for the first time, regulatory clarity on a streamlined path to potential full regulatory approval based on a single pivotal trial that does not require liver biopsy and includes the most relevant primary efficacy endpoint in PSC. This design allows us to significantly accelerate the potential timeline to full approval since there is no need for additional confirmatory studies. This is also the first time that FDA has agreed to the use of a primary endpoint for PSC comprised of clinical events associated with disease progression, which we and leading experts believe is practical, feasible and well-aligned with clinical practice and the natural history of the disease.”
Dr. Mor continued, “Importantly, key publications have shown that the reductions in PSC biomarkers in our nebokitug Phase 2 SPRING trial, especially the Enhanced Liver Fibrosis (ELF) and liver stiffness elastography measures, are associated with reductions in clinical events, increasing our confidence in the relevance of this approach for nebokitug and decreasing risk. We are looking forward to reporting topline data from the open label extension portion of the SPRING trial, which is primarily intended to provide additional data on nebokitug’s long term safety, before the end of the first quarter. The company is currently in active discussions with potential strategic partners while laying the groundwork for the Phase 3 program, which we could potentially launch before the end of the year.”
Christopher Bowlus, MD, the Lena Valente Professor and Chief of the Division of Gastroenterology and Hepatology at the University of California Davis School of Medicine, commented, “Until now, the pathway to drug approval in PSC has been problematic due to the lack of validated surrogate endpoints and clarity around primary efficacy endpoints for PSC registration trials. This has been a major hinderance to the development of effective therapies for PSC. I am delighted that the FDA and Chemomab have aligned on a Phase 3 trial design that focuses on the clinical events that we encounter in caring for PSC patients. These events are clinically relevant and impact our patients’ lives. The agreed composite endpoint approach for the nebokitug trial enhances our chances of efficiently and accurately identifying the potential clinical benefits of this promising new drug. Our patients with PSC are in urgent need of disease-modifying treatments, and I look forward to the launch of the nebokitug Phase 3 trial.”
The PSC pivotal trial design is focused on a set of clinically meaningful events that occur over time as the disease progresses. The trial’s primary endpoint will assess changes in the time-to-first-event of any one of a number of well-characterized PSC clinical events. Chemomab plans to enroll approximately 350 PSC patients to collect the requisite number of clinical events needed to demonstrate statistically significant changes between the treatment and placebo arms. It is estimated that in the absence of intervention, participants would require on average about two years to experience a clinically-meaningful event. The trial will also capture data on key biomarkers such as elastography, ELF score and cholangiography as additional indicators of clinical outcomes, which allows for possible inclusion of an interim analysis during the study.
Chemomab Chief Medical Officer Matt Frankel, MD, noted, “We are very pleased with the strong engagement and collaborative spirit expressed by FDA during our End-of-Phase 2 meeting. The planned study is an events-driven design that is similar to the approach used in many oncology registration trials. This design eliminates the need for invasive liver biopsies and costly, difficult-to-execute confirmatory studies. The results of this trial could also support ex-U.S. global marketing authorizations. Furthermore, given the potentially disease-modifying activity demonstrated by nebokitug, the focus on disease progression-related events may allow us to achieve a broad label in PSC, in contrast to more limited symptom-related endpoints such as pruritus.”
About the Nebokitug Phase 3 Trial for the Treatment of PSC
The trial is a randomized placebo-controlled (2:1 active to placebo ratio) clinical event-driven study. Patients in the active treatment arm will receive 20 mg/kg of nebokitug administered intravenously every three weeks. The primary endpoint is the time-to-first clinical event. The endpoint is a composite encompassing multiple, equally-weighted adverse clinical events associated with PSC disease progression, which may include acute cholangitis, biliary strictures requiring intervention, portal hypertension, hepatic decompensation, elevated MELD score (a measure associated with the need for liver transplant), liver transplantation, cholangiocarcinoma and death. Enrolled patients remain in the trial until they experience an event, and the trial continues until the requisite number of events has been collected. It is estimated that in the absence of intervention, participants would require on average about two years to achieve a clinically meaningful event. Clinical events will be assessed in a blinded fashion by an independent clinical endpoint adjudication committee. Approximately 350 PSC patients will be enrolled in the trial, and the study population will be enriched for patients with moderate and advanced disease. Chemomab expects to leverage the strong relationships with global clinical investigators it developed during its successful Phase 2 SPRING study to facilitate enrollment in the nebokitug pivotal trial.
About Nebokitug (CM-101)
Nebokitug is a first-in-class dual activity monoclonal antibody that neutralizes CCL24, a soluble protein that helps drive the inflammatory and fibrotic pathways central to PSC and other fibro-inflammatory diseases. By inhibiting CCL24, nebokitug blocks both immune cell recruitment and fibroblast activation, thereby interrupting the self-reinforcing fibro-inflammatory cycle that results in fibrosis. In clinical and preclinical studies, nebokitug has been shown to have a favorable safety profile, with the potential to treat multiple severe and life-threatening fibro-inflammatory diseases. Chemomab has reported positive results from four clinical trials of nebokitug in patients, including the Phase 2 SPRING trial in patients with PSC. This study achieved the primary safety endpoint and nebokitug-treated patients with moderate to advanced disease showed improvements on a wide range of disease-related secondary endpoints. A consistent pattern of greater improvement on the secondary endpoints was observed in the study arm receiving the higher 20 mg/kg dose of nebokitug. The open label extension portion of the SPRING trial is continuing, with results expected in the first quarter of 2025. Nebokitug has received FDA and EMA Orphan Drug and FDA Fast Track designations for the treatment of PSC in adults.
About Primary Sclerosing Cholangitis
PSC is a rare, debilitating progressive liver disease characterized by inflammation and fibrosis (scarring) of the bile ducts that can lead to cirrhosis of the liver, liver failure and death. PSC also increases the risk of various cancers, which account for about half of PSC-related mortality. PSC affects an estimated 30,000 patients in the U.S. and about 80,000 worldwide. The underlying cause of PSC is unknown, but about
Forward-Looking Statements
This press release contains forward-looking statements within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995 that involve substantial risks and uncertainties. All statements other than statements of historical facts contained in this press release, including statements regarding our future financial condition, results of operations, business strategy and plans, and objectives of management for future operations, as well as statements regarding industry trends, are forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as “estimate,” “intend,” “may,” “plan,” “potentially,” “will” or the negative of these terms or other similar expressions. We have based these forward-looking statements largely on our current expectations and projections about future events and trends that we believe may affect our financial condition, results of operations, business strategy and financial needs. These forward-looking statements are subject to a number of risks, uncertainties and assumptions, including, among other things: the risk that certain acknowledgements from the End-of-Phase 2 (EOP2) meeting with the FDA in connection with PSC regulatory approval will not materialize into a pathway for regulatory approval; that certain conclusions and assumptions drawn from the EOP2 meeting with the FDA discussed in the presentation will prove incorrect and adversely affect the ability for nebokitug to become an FDA fully approved therapy; the risk that the full data set from the nebokitug study or data generated in further clinical trials of nebokitug will not be consistent with the topline results of the nebokitug Phase 2 PSC trial; failure to obtain, or delays in obtaining, regulatory approvals for nebokitug in the U.S., Europe or other territories; failure to successfully commercialize nebokitug, if approved by applicable regulatory authorities, in the U.S., Europe or other territories, or to maintain U.S., European or other territory regulatory approval for nebokitug if approved; uncertainties in the degree of market acceptance of nebokitug by physicians, patients, third-party payors and others in the healthcare community; nebokitug development of unexpected safety or efficacy concerns related to nebokitug; failure to successfully conduct future clinical trials for nebokitug, including due to the Company's potential inability to enroll or retain sufficient patients to conduct and complete the trials or generate data necessary for regulatory approval, among other things; risks that the Company's clinical studies will be delayed or that serious side effects will be identified during drug development; failure of third parties on which the Company is dependent to manufacture sufficient quantities of nebokitug for commercial or clinical needs, to conduct the Company's clinical trials; changes in laws and regulations applicable to the Company's business and failure to comply with such laws and regulations; business or economic disruptions due to catastrophes or other events, including natural disasters or public health crises; and uncertainties with respect to the Company's need and ability to access future capital; and the intensity and duration of the current war in Israel, and its impact on our operations in Israel. These risks are not exhaustive. You should carefully consider the risks and uncertainties described in the “Risk Factors” sections of our 20-F for the year ended December 31, 2023. New risk factors emerge from time to time, and it is not possible for our management to predict all risk factors, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in, or implied by, any forward-looking statements. You should not rely upon forward-looking statements as predictions of future events. Except as required by law, we undertake no obligation to update publicly any forward-looking statements for any reason after the date of this press release. Before you invest, you should read the documents we have filed and will file with the SEC for more complete information about us. You may get these documents for free by visiting EDGAR on the SEC website at www.sec.gov. This press release shall not constitute an offer to sell or the solicitation of an offer to buy these securities, nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation, or sale would be unlawful prior to registration or qualification under the securities law of any such state or jurisdiction.
About Chemomab Therapeutics Ltd.
Chemomab is a clinical stage biotechnology company developing innovative therapeutics for fibro-inflammatory diseases with high unmet need. Based on the unique role of the soluble protein CCL24 in promoting fibrosis and inflammation, Chemomab developed nebokitug (CM-101), a first-in-class dual activity monoclonal antibody that neutralizes CCL24 and has demonstrated disease-modifying potential. In clinical and preclinical studies, nebokitug has been shown to have a favorable safety profile and has been generally well-tolerated, with the potential to treat multiple severe and life-threatening fibro-inflammatory diseases. Chemomab has reported positive results from four clinical trials of nebokitug in patients. Based on recent positive data from its Phase 2 SPRING trial in primary sclerosing cholangitis (PSC), the company is preparing for potential initiation of a PSC nebokitug Phase 3 pivotal trial. Data from the SPRING trial open label extension will be reported in the first quarter of 2025. Nebokitug has received FDA and EMA Orphan Drug and FDA Fast Track designations for the treatment of PSC. Chemomab’s nebokitug program for the treatment of systemic sclerosis has an open U.S. IND. For more information, visit: chemomab.com.
Contacts:
Media and Investors:
Barbara Lindheim
Consulting Vice President, Investor & Public Relations,
Strategic Communications
Phone: +1 917-355-9234
barbara.lindheim@chemomab.com
IR@chemomab.com
FAQ
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