Dupixent® (dupilumab) Significantly Reduced COPD Exacerbations in Second Positive Phase 3 Trial, Accelerating FDA Submission and Confirming Potential to Become First Approved Biologic for This Serious Disease

• NOTUS trial met its primary endpoint with overwhelming efficacy, showing Dupixent significantly reduced exacerbations by 34% compared to placebo in patients with moderate-to-severe COPD with evidence of type 2 inflammation (i.e., blood eosinophils ≥300 cells per μL), confirming results from the landmark BOREAS pivotal trial
• Dupixent rapidly and significantly improved lung function (139 mL in FEV₁) compared to placebo (57 mL in FEV₁) at 12 weeks
• Supplemental BLA submission planned by end of 2023
• Approximately 300,000 people in the United States live with uncontrolled COPD with evidence of type 2 inflammation; no new treatment approaches approved for more than a decade

TARRYTOWN, N.Y. and PARIS, Nov. 27, 2023 (GLOBE NEWSWIRE) -- Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) and Sanofi today announced that the second Dupixent^® (dupilumab) investigational Phase 3 chronic obstructive pulmonary disease (COPD) trial (NOTUS) showed that Dupixent significantly reduced (34%) exacerbations, confirming positive results from the landmark Phase 3 BOREAS trial. The NOTUS trial also confirmed that treatment with Dupixent led to rapid and significant improvements in lung function by 12 weeks and were sustained at 52 weeks.

The NOTUS trial evaluated the investigational use of Dupixent compared to placebo in adults currently on maximal standard-of-care inhaled therapy (triple therapy) with uncontrolled COPD and evidence of type 2 inflammation (i.e., blood eosinophils ≥300 cells per μL). These results were from an interim analysis and, given the overwhelming positive efficacy of the primary endpoint, will be considered the primary analysis of the trial. Regeneron and Sanofi plan to submit the data from this replicate trial, along with positive results from the Phase 3 BOREAS trial to the U.S. Food and Drug Administration (FDA) by the end of the year.

“We are highly encouraged by these remarkable results from NOTUS showing a 34% reduction in COPD exacerbations compared to placebo, confirming the unprecedented results from our first Phase 3 trial, BOREAS,” said George D. Yancopoulos, M.D., Ph.D., Board Co-Chair, President and Chief Scientific Officer at Regeneron, and a principal inventor of Dupixent. “These results demonstrate the important role of type 2 inflammation in yet another chronic and debilitating disease, and the ability of Dupixent to address this inflammation. We are working to submit these data rapidly to the FDA.”

Earlier this year, the FDA granted Breakthrough Therapy designation for Dupixent as an add-on maintenance treatment in adult patients with uncontrolled COPD associated with a history of exacerbations and an eosinophilic phenotype based on the positive results from BOREAS.

“This is the first and only time an investigational biologic in COPD has shown a significant and clinically meaningful reduction in exacerbations in two Phase 3 trials and we are pleased that we can potentially deliver Dupixent faster to patients in need where no new advancements have been identified in over a decade,” said Naimish Patel, M.D., Head of Global Development, Immunology and Inflammation at Sanofi. “These data validate our belief that Dupixent has the potential to transform the treatment of moderate-to-severe COPD and given the significant unmet needs for patients with uncontrolled COPD, we are not stopping with Dupixent. Our second program in COPD, itepekimab, continues with data expected in 2025. If positive, Dupixent and itepekimab could emerge as treatments for approximately 80% of those suffering from moderate-to-severe COPD with recurrent exacerbations.”

The NOTUS trial included 935 adults who were current or former smokers aged 40 to 85 years and randomized to receive Dupixent (n=470) or placebo (n=465), which was added to maximal standard-of-care inhaled therapy. Patients receiving Dupixent compared to placebo experienced:

• 34% reduction in moderate or severe acute COPD exacerbations over 52 weeks (p=0.0002), the primary endpoint.
• Improved lung function from baseline by 139 mL at 12 weeks compared to 57 mL for placebo (p=0.0001), with the benefit versus placebo sustained at week 52 (115 mL for Dupixent versus 54 mL for placebo, p=0.0182).

The safety results were generally consistent with the known safety profile of Dupixent in its approved indications. Overall rates of adverse events (AE) were 67% for Dupixent and 66% for placebo. AEs more commonly observed with Dupixent (≥5% and ≥1% imbalance) compared to placebo included COVID-19 (9.4% Dupixent, 8.2% placebo), nasopharyngitis (6.2% Dupixent, 5.2% placebo) and headache (7.5% Dupixent, 6.5% placebo). AEs more commonly observed with placebo compared to Dupixent included COPD (7.8% placebo, 4.9% Dupixent). AEs leading to deaths were 2.6% for Dupixent and 1.5% for placebo.

Detailed results from the NOTUS trial are planned for presentation at a future scientific forum.

The efficacy results in NOTUS were consistent with the previously announced results in BOREAS. BOREAS results showed:

• 30% reduction in moderate or severe acute COPD exacerbations over 52 weeks (p=0.0005), the primary endpoint.
• Improved lung function from baseline by 160 mL at 12 weeks compared to 77 mL for placebo (p<0.0001), with the benefit versus placebo sustained through week 52 (p=0.0003).

The safety results in NOTUS were also consistent with those previously announced in BOREAS. Overall rates of AEs in BOREAS were 77% for Dupixent and 76% for placebo. AEs more commonly observed with Dupixent compared to placebo included headache (8.1% Dupixent, 6.8% placebo), diarrhea (5.3% Dupixent, 3.6% placebo) and back pain (5.1% Dupixent, 3.4% placebo). AEs more commonly observed with placebo compared to Dupixent included upper respiratory tract infection (9.8% placebo, 7.9% Dupixent), hypertension (6.0% placebo, 3.6% Dupixent) and COVID-19 (5.7% placebo, 4.1% Dupixent). AEs leading to deaths were 1.5% for Dupixent and 1.7% for placebo.

The European Medicines Agency is reviewing Regeneron and Sanofi’s application for Dupixent for the treatment of uncontrolled COPD with type 2 inflammation; this application is based on results from the BOREAS trial. Discussions with other regulatory authorities around the world are ongoing.

The safety and efficacy of Dupixent in COPD are currently under clinical investigation and have not been evaluated by any regulatory authority.

About COPD
COPD is a respiratory disease that damages the lungs and causes progressive lung function decline. Symptoms include persistent cough, breathlessness and excessive mucus production that may not only impair the ability to perform routine daily activities, but can also lead to anxiety, depression and sleep disturbances. COPD is also associated with a significant health and economic burden due to recurrent acute exacerbations that require systemic corticosteroid treatment and/or lead to hospitalization. Smoking and exposure to noxious particles are key risk factors for COPD, but even individuals who quit smoking can still develop or continue having the disease. In the United States, approximately 300,000 people live with uncontrolled COPD with evidence of type 2 inflammation.

About the Dupixent COPD Phase 3 Trial Program
NOTUS and BOREAS are replicate, randomized, Phase 3, double-blind, placebo-controlled trials that evaluated the efficacy and safety of Dupixent in adults who were current or former smokers with moderate-to-severe COPD aged 40 to 85 years in NOTUS and 40 to 80 years in BOREAS. Enrolling a total of 1,874 patients, all patients in NOTUS and BOREAS had evidence of type 2 inflammation, as measured by blood eosinophils ≥300 cells per µL. Patients with a diagnosis or history of asthma were excluded from the trials.

During the 52-week treatment period, patients in NOTUS and BOREAS received Dupixent or placebo every two weeks added to a maximal standard-of-care inhaled triple therapy of inhaled corticosteroids (ICS), long-acting beta agonists (LABA), and long-acting muscarinic antagonists (LAMA). Double maintenance therapy, which included LABA and LAMA, was allowed if ICS was contraindicated.

The primary endpoint for NOTUS and BOREAS evaluated the annualized rate of acute moderate or severe COPD exacerbations. Moderate exacerbations were defined as those requiring systemic steroids and/or antibiotics. Severe exacerbations were defined as those: requiring hospitalization; requiring more than a day of observation in an emergency department or urgent care facility; or resulting in death. Key secondary endpoints included change from baseline in lung function (assessed by pre-bronchodilator forced expiratory volume [FEV₁]) at 12 and 52 weeks.

Data from BOREAS were published in the New England Journal of Medicine.

About Regeneron and Sanofi’s COPD Clinical Research Program
Regeneron and Sanofi are motivated to transform the treatment paradigm of COPD by examining the role different types of inflammation play in the disease progression through the investigation of two potentially first-in-class biologics, Dupixent and itepekimab.

Dupixent inhibits the signaling of the interleukin-4 (IL-4) and interleukin-13 (IL-13) pathways and the program focuses on a specific population of people with evidence of type 2 inflammation. Itepekimab is a fully human monoclonal antibody that binds to and inhibits interleukin-33 (IL-33), an initiator and amplifier of broad inflammation in COPD. Across both programs, four Phase 3 trials are ongoing and designed to inform next-generation treatments for people with COPD who might not have other options.

Itepekimab is currently under clinical investigation and its safety and efficacy have not been evaluated by any regulatory authority.

About Dupixent
Dupixent, which was invented using Regeneron’s proprietary VelocImmune^® technology, is a fully human monoclonal antibody that inhibits the signaling of the interleukin-4 (IL-4) and interleukin-13 (IL-13) pathways and is not an immunosuppressant. The Dupixent development program has shown significant clinical benefit and a decrease in type 2 inflammation in Phase 3 trials, establishing that IL-4 and IL-13 are key and central drivers of the type 2 inflammation that plays a major role in multiple related and often co-morbid diseases. These diseases include approved indications for Dupixent, such as atopic dermatitis, asthma, chronic rhinosinusitis with nasal polyposis (CRSwNP), eosinophilic esophagitis (EoE) and prurigo nodularis.

Dupixent has received regulatory approvals in one or more countries around the world for use in certain patients with atopic dermatitis, asthma, CRSwNP, EoE or prurigo nodularis in different age populations. Dupixent is currently approved for one or more of these indications in more than 60 countries, including in Europe, the U.S. and Japan. Approximately 750,000 patients are being treated with Dupixent globally.

About Regeneron’s VelocImmune^® Technology
Regeneron’s VelocImmune technology utilizes a proprietary genetically engineered mouse platform endowed with a genetically humanized immune system to produce optimized fully human antibodies. When Regeneron’s co-Founder, President and Chief Scientific Officer George D. Yancopoulos was a graduate student with his mentor Frederick W. Alt in 1985, they were the first to envision making such a genetically humanized mouse, and Regeneron has spent decades inventing and developing VelocImmune and related VelociSuite^® technologies. Dr. Yancopoulos and his team have used VelocImmune technology to create a substantial portion of all original, FDA-approved or authorized fully human monoclonal antibodies. This includes REGEN-COV^® (casirivimab and imdevimab), Dupixent, Libtayo^® (cemiplimab-rwlc), Praluent^® (alirocumab), Kevzara^® (sarilumab), Evkeeza^® (evinacumab-dgnb) and Inmazeb^® (atoltivimab, maftivimab and odesivimab-ebgn).

Dupilumab Development Program
Dupilumab is being jointly developed by Regeneron and Sanofi under a global collaboration agreement. To date, dupilumab has been studied across more than 60 clinical trials involving more than 10,000 patients with various chronic diseases driven in part by type 2 inflammation.

In addition to the currently approved indications, Regeneron and Sanofi are studying dupilumab in a broad range of diseases driven by type 2 inflammation or other allergic processes in Phase 3 trials, including pediatric EoE, chronic spontaneous urticaria, chronic pruritus of unknown origin, chronic obstructive pulmonary disease with evidence of type 2 inflammation and bullous pemphigoid. These potential uses of dupilumab are currently under clinical investigation, and the safety and efficacy in these conditions have not been fully evaluated by any regulatory authority.

U.S. INDICATIONS

DUPIXENT is a prescription medicine used:

• to treat adults and children 6 months of age and older with moderate-to-severe eczema (atopic dermatitis or AD) that is not well controlled with prescription therapies used on the skin (topical), or who cannot use topical therapies. DUPIXENT can be used with or without topical corticosteroids. It is not known if DUPIXENT is safe and effective in children with atopic dermatitis under 6 months of age.
• with other asthma medicines for the maintenance treatment of moderate-to-severe eosinophilic or oral steroid dependent asthma in adults and children 6 years of age and older whose asthma is not controlled with their current asthma medicines. DUPIXENT helps prevent severe asthma attacks (exacerbations) and can improve your breathing. DUPIXENT may also help reduce the amount of oral corticosteroids you need while preventing severe asthma attacks and improving your breathing. DUPIXENT is not used to treat sudden breathing problems. It is not known if DUPIXENT is safe and effective in children with asthma under 6 years of age.
• with other medicines for the maintenance treatment of chronic rhinosinusitis with nasal polyposis (CRSwNP) in adults whose disease is not controlled. It is not known if DUPIXENT is safe and effective in children with chronic rhinosinusitis with nasal polyposis under 18 years of age.
• to treat adults and children 12 years of age and older, who weigh at least 88 pounds (40 kg), with eosinophilic esophagitis (EoE). It is not known if DUPIXENT is safe and effective in children with eosinophilic esophagitis under 12 years of age and who weigh at least 88 pounds (40 kg).
• to treat adults with prurigo nodularis (PN). It is not known if DUPIXENT is safe and effective in children with prurigo nodularis under 18 years of age.

IMPORTANT SAFETY INFORMATION

Donotuse if you are allergic to dupilumab or to any of the ingredients in DUPIXENT^®.

Before usingDUPIXENT,tellyourhealthcareprovideraboutall yourmedicalconditions,includingif you:

• have eye problems.
• have a parasitic (helminth) infection.
• are scheduled to receive any vaccinations. You should not receive a “live vaccine” right before and during treatment with DUPIXENT.
• are pregnant or plan to become pregnant. It is not known whether DUPIXENT will harm your unborn baby.
  • A pregnancy registry for women who take DUPIXENT during pregnancy collects information about the health of you and your baby. To enroll or get more information call 1-877-311-8972 or go to https://mothertobaby.org/ongoing-study/dupixent/.
• are breastfeeding or plan to breastfeed. It is not known whether DUPIXENT passes into your breast milk.

Tell your healthcare provider about all the medicines you take, including prescription and over-the- counter medicines, vitamins, and herbal supplements.

Especially tell your healthcare provider if you are taking oral, topical, or inhaled corticosteroid medicines; have asthma and use an asthma medicine; or have atopic dermatitis, chronic rhinosinusitis with nasal polyposis, eosinophilic esophagitis, or prurigo nodularis and also have asthma. Do not change or stop your corticosteroid medicine or other asthma medicine without talking to your healthcare provider. This may cause other symptoms that were controlled by the corticosteroid medicine or other asthma medicine to come back.

DUPIXENTcancauseserious sideeffects,including:

• Allergic reactions. DUPIXENT can cause allergic reactions that can sometimes be severe. Stop using DUPIXENT and tell your healthcare provider or get emergency help right away if you get any of the following signs or symptoms: breathing problems or wheezing, swelling of the face, lips, mouth, tongue or throat, fainting, dizziness, feeling lightheaded, fast pulse, fever, hives, joint pain, general ill feeling, itching, skin rash, swollen lymph nodes, nausea or vomiting, or cramps in your stomach-area.
• Eye problems. Tell your healthcare provider if you have any new or worsening eye problems, including eye pain or changes in vision, such as blurred vision. Your healthcare provider may send you to an ophthalmologist for an exam if needed.
• Inflammationof yourbloodvessels. Rarely, this can happen in people with asthma who receive DUPIXENT. This may happen in people who also take a steroid medicine by mouth that is being stopped or the dose is being lowered. It is not known whether this is caused by DUPIXENT. Tell your healthcare provider right away if you have: rash, chest pain, worsening shortness of breath, a feeling of pins and needles or numbness of your arms or legs, or persistent fever.
• Joint aches and pain. Some people who use DUPIXENT have had trouble walking or moving due to their joint symptoms, and in some cases needed to be hospitalized. Tell your healthcare provider about any new or worsening joint symptoms. Your healthcare provider may stop DUPIXENT if you develop joint symptoms.

Themostcommon sideeffectsinclude:

• Eczema: injection site reactions, eye and eyelid inflammation, including redness, swelling, and itching, sometimes with blurred vision, cold sores in your mouth or on your lips, and high count of a certain white blood cell (eosinophilia).
• Asthma: injection site reactions, high count of a certain white blood cell (eosinophilia), pain in the throat (oropharyngeal pain), and parasitic (helminth) infections.
• Chronic Rhinosinusitis with Nasal Polyposis: injection site reactions, eye and eyelid inflammation, including redness, swelling, and itching, sometimes with blurred vision, high count of a certain white blood cell (eosinophilia), gastritis, joint pain (arthralgia), trouble sleeping (insomnia), and toothache.
• Eosinophilic Esophagitis: injection site reactions, upper respiratory tract infections, cold sores in your mouth or on your lips, and joint pain (arthralgia).
• Prurigo Nodularis: eye and eyelid inflammation, including redness, swelling, and itching, sometimes with blurred vision, herpes virus infections, common cold symptoms (nasopharyngitis), dizziness, muscle pain, and diarrhea.

Tell your healthcare provider if you have any side effect that bothers you or that does not go away. These are not all the possible side effects of DUPIXENT. Call your doctor for medical advice about side effects. You are encouraged to report negative side effects of prescription drugs to the FDA. Visit www.fda.gov/medwatch, or call 1-800-FDA-1088.

Use DUPIXENT exactly as prescribed by your healthcare provider. It’s an injection given under the skin (subcutaneous injection). Your healthcare provider will decide if you or your caregiver can inject DUPIXENT. Do not try to prepare and inject DUPIXENT until you or your caregiver have been trained by your healthcare provider. In children 12 years of age and older, it’s recommended DUPIXENT be administered by or under supervision of an adult. In children 6 months to less than 12 years of age, DUPIXENT should be given by a caregiver.

PleaseseeaccompanyingfullPrescribingInformationincludingPatientInformation.

About Regeneron
Regeneron is a leading biotechnology company that invents, develops, and commercializes life-transforming medicines for people with serious diseases. Founded and led for 35 years by physician-scientists, Regeneron’s unique ability to repeatedly and consistently translate science into medicine has led to numerous FDA-approved treatments and product candidates in development, almost all of which were homegrown in Regeneron’s laboratories. Regeneron’s medicines and pipeline are designed to help patients with eye diseases, allergic and inflammatory diseases, cancer, cardiovascular and metabolic diseases, hematologic conditions, infectious diseases, and rare diseases.

Regeneron is accelerating and improving the traditional drug development process through its proprietary VelociSuite^® technologies, such as VelocImmune^®, which uses unique genetically humanized mice to produce optimized fully human antibodies and bispecific antibodies, and through ambitious research initiatives such as the Regeneron Genetics Center^®, which is conducting one of the largest genetics sequencing efforts in the world.

For additional information about Regeneron, please visit www.regeneron.com or follow Regeneron on LinkedIn.

About Sanofi
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.

Regeneron Forward-Looking Statements and Use of Digital Media
This press release includes forward-looking statements that involve risks and uncertainties relating to future events and the future performance of Regeneron Pharmaceuticals, Inc. (“Regeneron” or the “Company”), and actual events or results may differ materially from these forward-looking statements. Words such as “anticipate,” “expect,” “intend,” “plan,” “believe,” “seek,” “estimate,” variations of such words, and similar expressions are intended to identify such forward-looking statements, although not all forward-looking statements contain these identifying words. 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Sanofi Disclaimers or Forward-Looking Statements
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