Clene Reports Topline Results Demonstrating Survival Signal for CNM-Au8® in Healey ALS Platform Trial
- Category: Small Molecules
- Published on Monday, 03 October 2022 18:39
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The primary endpoint of adjusted ALSFRS-R and secondary endpoints of CAFS and SVC were not met at 24 weeks
Prespecified exploratory analyses of the secondary survival endpoint for the 30 mg dose demonstrated a >90% reduction in risk of death or risk of death/permanently assisted ventilation at 24 weeks
Survival signal consistent with prior results from the Phase 2 RESCUE-ALS trial
Clene will continue the open-label extension of CNM-Au8 in the Healey ALS Platform Trial and is in discussions with the Healey & AMG ALS Center to design and offer an Expanded Access Protocol (EAP) of CNM-Au8 30mg for eligible participants of closed regimens and others
Clene is pursuing multiple paths, including ongoing discussions with potential strategic partners, in its goal of marketing authorization
SALT LAKE CITY, UT, USA I October 03, 2022 I Clene Inc. (Nasdaq: CLNN) (along with its subsidiaries, “Clene”) and its wholly owned subsidiary Clene Nanomedicine Inc., a clinical-stage biopharmaceutical company focused on revolutionizing the treatment of neurodegenerative disease, today announced topline study results showing a survival benefit in the Healey ALS Platform trial of CNM-Au8®, an investigational gold nanocrystal suspension, in participants with amyotrophic lateral sclerosis (ALS).
The primary endpoint of slope of change in ALS Functional Rating Scale Revised (ALSFRS-R) scores adjusted for mortality was not significant (2% slowing, 95% CI: -20% to +19%) at 24 weeks. Secondary endpoints of Combined Assessment of Function and Survival (CAFS) and slow vital capacity (SVC) were also not met at 24 weeks across the combined 30 mg and 60 mg CNM-Au8 doses.
The prespecified exploratory analyses of the secondary survival endpoint demonstrated a >90% reduction in risk of death alone or in risk of death/permanently assisted ventilation at 24 weeks, when adjusted for baseline imbalances in risk (p=0.028 to p=0.075, unadjusted for multiple comparisons) with the CNM-Au8 30 mg dose. These survival results were statistically consistent for the 30 mg dose between the regimen only and full analysis sets, which included shared placebo from other regimens participating in the Healey ALS Platform trial (Regimens A, B, and D). This survival signal is consistent with results previously reported by Clene in the Phase 2 RESCUE-ALS trial with CNM-Au8.
The full analyses, including data on biomarkers of neurodegeneration and exploratory efficacy results, are expected later in 2022. The open-label extension will continue to follow participants and provide data updates in the future. Clene is in discussions with the Healey & AMG ALS Center to offer a broader EAP of CNM-Au8 30 mg for eligible participants of closed regimens and others.
Based on these topline findings, Clene has selected the CNM-Au8 30 mg dose for continued development in ALS. The CNM-Au8 60 mg dose did not demonstrate a survival benefit.
CNM-Au8 was well-tolerated, and there were no drug-related serious adverse events or significant safety findings reported.
“There remains a high unmet medical need for treatments for people living with ALS. The potential survival benefit with CNM-Au8 at 30 mg is encouraging. Additional pre-specified exploratory analyses of both the RCT and open-label extension part of the study will be shared once available,” said Merit Cudkowicz, M.D., MSc, principal investigator and sponsor of the Healey ALS Platform Trial, director of the Sean M. Healey & AMG Center for ALS, chief of the Department of Neurology at Massachusetts General Hospital, and the Julieanne Dorn Professor of Neurology at Harvard Medical School. “We are thankful to the many people who participated in this study. We will learn from these results and continue to use these data to inform future advances in ALS trial design,” she concluded.
Robert Glanzman, M.D., FAAN, Clene’s Chief Medical Officer, said, "We are very pleased to see a survival benefit in a broad population of people who had already been living with ALS for up to three years. Importantly, this is the second Phase 2 study demonstrating a survival benefit following CNM-Au8 treatment. CNM-Au8’s mechanism of enabling energy metabolism and efficiency may not be reflected in the slope of ALSFRS-R change after only 24 weeks of treatment. These Healey ALS Platform Trial results support advancement of the CNM-Au8 30 mg dose. We look forward to discussions with U.S. regulatory authorities at an End of Phase 2 meeting for our CNM-Au8 development program in ALS.”
Rob Etherington, Clene’s President and CEO, added, “The survival results from this trial together with the consistent benefit seen in the open-label extension of the Phase 2 RESCUE-ALS trial, based on up to 31.5 months of long-term follow-up, support the rationale for treating neuronal and glial energetic failure with CNM-Au8. We have now completed multiple Phase 2 studies in ALS and MS, building a body of evidence demonstrating that CNM-Au8 supports cellular energy production, improving myelination and neuronal viability. We believe supporting brain energetic capacity translates to patient benefit, including survival. We will work closely with regulatory health authorities, ALS experts, and patient representatives to determine the proper path for FDA and EMA approval. Clene remains committed to advancing CNM-Au8 clinical programs to the ultimate goal of FDA approval. To support this effort, Clene is pursuing paths, including strategic partnerships, and is in dialogue with various potential partners.”
Michael Hotchkin, Clene’s Chief Development Officer, concluded, “We thank the ALS community for its support of the Healey ALS Platform trial. Furthermore, we thank the site investigators for their research excellence and dedication to patients, and we thank Dr. Cudkowicz and the team at the Healey & AMG ALS center for their leadership and for the development of the platform trial. Most importantly, we thank people living with ALS who participated in the study and their families for their effort and willingness to engage in clinical research.”
About the Healey ALS Platform Trial
The Healey ALS Platform Trial is a perpetual multi-center, randomized, double-blind, placebo-controlled program designed to evaluate the efficacy and safety of multiple investigational products utilizing a shared placebo group in people living with amyotrophic lateral sclerosis (ALS). In the CNM-Au8 regimen, 161 participants were randomized to 30 mg CNM-Au8, 60 mg CNM-Au8, or placebo as adjunct to standard of care for a 24-week treatment period. Active drug was offered to all participants who were eligible and elected to continue into the open-label extension. The primary outcome of the trial was the change in disease severity over time as measured by ALSFRS-R through 24 weeks accounting for mortality (analyzed using a Bayesian shared parameter model). Prespecified secondary efficacy endpoints included the Combined Assessment of Function and Survival joint rank test (CAFS), change in respiratory function as measured by slow vital capacity (SVC), and overall survival. For more information, please see ClinicalTrials.gov Identifier: NCT04297683.
CNM-Au8 is Clene’s lead asset in mid- and late-stage clinical development for the treatment of multiple sclerosis and amyotrophic lateral sclerosis. An oral suspension of gold nanocrystals, CNM-Au8 was developed to protect neuronal health and function by increasing energy production and utilization. The catalytically active nanocrystals of CNM-Au8 drive critical cellular energy producing reactions that enable neuroprotection and remyelination by increasing neuronal and glial resilience to disease-relevant stressors. CNM-Au8® is a federally registered trademark of Clene Nanomedicine, Inc.
Clene is a clinical-stage biopharmaceutical company focused on revolutionizing the treatment of neurodegenerative disease by targeting energetic failure, an underlying cause of many neurological diseases. The company is based in Salt Lake City, Utah, with R&D and manufacturing operations in Maryland. For more information, please visit www.clene.com or follow us on Twitter, LinkedIn and Facebook.