Press release: New Phase 3 data presented at WORLDSymposium™ reinforce Nexviazyme® (avalglucosidase alfa) as potential new standard of care for all people living with late-onset Pompe disease
New Phase 3 datapresented at WORLDSymposium™reinforce Nexviazyme®(avalglucosidase alfa) as potential new standard of care for all people living with late-onset Pompe disease
Paris, February 24, 2023. Today, at WORLDSymposiumTM, data from the Phase 3 COMET study long-term extension showed sustained treatment effect of Nexviazyme® (avalglucosidase alfa) over nearly three years in late-onset Pompe disease (LOPD) patients who were treatment-naïve as well as those who switched from long-time standard of care, alglucosidase alfa, during the 96-week extension period. Additionally, a separate analysis of respiratory function showed clinical benefit over two years for patients who switched to Nexviazyme regardless of prior response to alglucosidase alfa.
Priya S. Kishnani, MD
C.L. and Su Chen Professor of Pediatrics; Medical Director, YT and Alice Chen Pediatrics Genetics and Genomics Center; and Division Chief, Medical Genetics, Duke University Medical Center
“The results presented at the 2023 WORLDSymposiumcontinue to build on the datafrom the clinical trialson the value and long-term impact Nexviazymemayprovide for a wide variety of people living with late-onset Pompe disease, from newly diagnosed patients to those who have been previously treated with alglucosidase alfa. Further, when examining patients treated with Nexviazyme who switched from using alglucosidase alfa, these data show clinical benefit bothfor patients who were stableonalglucosidase alfa andthose who experienced sub-optimal response or decline.”
Global Head of Specialty Care, Sanofi
“These long-term data over nearly three years add to the robust body of evidence that consistently shows the clinical benefit and durability of effect of treatment with Nexviazyme forboth treatment-experienced and treatment-naïve people living withlate-onset Pompe disease.We continue to learn from our 20 years of experience in Pompe disease and build on our findings in an effort to advance the standard of care.”
Nexviazyme is a monotherapy approved in the US and other markets for the treatment of LOPD. It is also approved for infantile-onset Pompe disease (IOPD) in certain markets outside of the US.
Nexviazyme maintained treatment effect at 145 weeks
The Phase 3 COMET trial enrolled 100 previously untreated LOPD patients who were randomized to receive either Nexviazyme (20 mg/kg) or alglucosidase alfa (20 mg/kg) every two weeks for 49 weeks during the double-blind primary analysis period. During the open-label extension period, long-term efficacy and safety outcomes were assessed up to 145 weeks in patients who continued their treatment with Nexviazyme (n=51), as well as those who switched to treatment with Nexviazyme from alglucosidase alfa (n=44) at the conclusion of the primary analysis period (Week 49).
After nearly three years (145 weeks), changes from baseline (least squares mean [standard error]) showed:
- Patients who received continuous Nexviazyme treatment for 145 weeks experienced sustained improvements in respiratory and motor function, showing a 1.40 (1.21) point improvement in forced vital capacity (FVC) percent-predicted and an average increase of 20.65 (9.60) meters in walking distance as measured by the six-minute walk test (6MWT), respectively, compared to baseline.
- Patients who switched from alglucosidase alfa to Nexviazyme treatment during the extension period experienced stabilization of treatment effect, showing a 1.18 (1.32) point improvement in FVC percent-predicted and an average increase of 0.29 (10.42) meters in walking distance (6MWT), compared to baseline.
The safety profile during treatment with Nexviazyme was comparable between both study groups (those who started Nexviazyme in the primary analysis period and those who switched to Nexviazyme during the extension period). No new safety signals were observed in patients who switched from alglucosidase alfa to Nexviazyme during the extension period. Across both Nexviazyme treatment groups, five patients discontinued treatment during the extension period due to six adverse events (AEs); four were treatment-related (ocular hyperemia, erythema, urticaria, respiratory distress), and two were non-treatment-related (acute myocardial infarction, pancreatic adenocarcinoma).
Clinical benefits seen over two years for patients who switched to Nexviazyme
Subgroup analyses were also performed to assess respiratory function outcomes for the 44 patients who switched to Nexviazyme in the long-term extension period of the Phase 3 COMET study. Patients were divided into two subgroups, responders (n=14) and non-responders (n=30) based on individual responses to initial treatment with alglucosidase alfa, as measured by the change in FVC percent-predicted (ΔFVC %predicted/year) pre- (baseline-week 49) and post-switch (week 49-week 145). Findings showed clinical benefits over two years following switch to Nexviazyme regardless of prior response to alglucosidase alfa:
- Patients who responded to alglucosidase alfa treatment in the primary analysis period had increased respiratory function (ΔFVC slope, 4.67±1.28%/yr, p<0.001), which was maintained throughout the extension period with Nexviazyme treatment (ΔFVC slope, 0.14±0.94%/yr, p=0.88).
- Patients who did not respond to alglucosidase alfa treatment in the primary analysis period had reduced respiratory function while taking alglucosidase alfa (ΔFVC slope, -2.12±0.87%/yr, p=0.016); however, switching to Nexviazyme halted this decline in the extension period (ΔFVC slope, 0.15±0.61%/yr, p=0.81).
About Pompe disease
People living with Pompe disease have low levels of the enzyme acid alpha-glucosidase (GAA), which results in build-up of glycogen in muscle cells throughout the body, leading to irreversible damage to skeletal and cardiac muscles.
Pompe disease can present as infantile-onset Pompe disease (IOPD), the most severe form of the disease with rapid onset in infancy, or late-onset Pompe disease (LOPD), which progressively damages muscles over time. If left untreated, IOPD can lead to heart failure and death within the first year of life, while people living with LOPD may require mechanical ventilation to help with breathing or a wheelchair to assist with mobility as the disease progresses.
About Nexviazyme (avalglucosidase alfa)
Nexviazyme (avalglucosidase alfa) is an enzyme replacement therapy (ERT) designed to target the mannose-6-phosphate (M6P) receptor, the key pathway for uptake and transport of ERT. Nexviazyme aims to help improve uptake and enhance glycogen clearance in target tissues with an average 15-fold higher level of M6P moieties as compared to alglucosidase alfa, the comparator therapy in the pivotal study. Nexviazyme is approved in multiple markets around the world for the treatment of people living with Pompe disease, including the United States, the European Union, Japan, Canada, Switzerland, Australia, Brazil, Argentina, Taiwan, the United Arab Emirates, South Korea and the United Kingdom, with specific indications varying by country. In Europe, the medicine is marketed under the brand name Nexviadyme.
We are an innovative global healthcare company, driven by one purpose: we chase the miracles of science to improve people’s lives. Our team, across some 100 countries, is dedicated to transforming the practice of medicine by working to turn the impossible into the possible. We provide potentially life-changing treatment options and life-saving vaccine protection to millions of people globally, while putting sustainability and social responsibility at the center of our ambitions.
Sanofi is listed on EURONEXT: SAN and NASDAQ: SNY
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