Amgen: Tezspire Met Both Co-primary Endpoints In Phase 3 Trial For Chronic Rhinosinusitis With Nasal Polyps

Statistically Significant Reduction in Nasal Polyp Size, Nasal Congestion Compared to Placebo

THOUSAND OAKS, Calif., Nov. 7, 2024 /PRNewswire/ -- Amgen (NASDAQ:AMGN) and AstraZeneca today announced positive top-line results from the Phase 3 WAYPOINT trial in patients with chronic rhinosinusitis with nasal polyps (CRSwNP [nasal polyps]). The trial demonstrated patients treated with TEZSPIRE^® (tezepelumab-ekko) had a statistically significant and clinically meaningful reduction in the size of nasal polyps and reduced nasal congestion compared to placebo. The safety profile and tolerability of TEZSPIRE in the trial were consistent with the known profile of the medicine.

WAYPOINT was a randomized, double-blind, placebo-controlled trial evaluating the efficacy and safety of TEZSPIRE administered subcutaneously in adults with severe CRSwNP. Participants in the trial were symptomatic despite treatment with standard of care, intranasal corticosteroids (INCS).¹ CRSwNP is a complex inflammatory condition characterized by persistent inflammation of the nasal mucosa accompanied by soft tissue growths, called nasal polyps, and is most commonly treated with INCS and surgery, if required.^2,3

"Chronic rhinosinusitis with nasal polyps negatively impact patients' daily lives with the obstructions leading to disturbances in smell, taste and sleep, as well as pain and fatigue," said Dr. Joseph Han, vice chair of Rhinology & Endoscopic Sinus and Skull Base Surgery, and Allergy, Otolaryngology-Head and Neck Surgery, Eastern Virginia Medical School, US, and co-primary investigator in the trial. "The impressive data from the WAYPOINT trial demonstrate tezepelumab's potential as a new treatment for patients whose lives are disrupted by this debilitating disease."

"The top-line results from our Phase 3 WAYPOINT study represent a significant step forward in our commitment to enhancing the lives of those affected by chronic rhinosinusitis with nasal polyps," said Jay Bradner, M.D., executive vice president of Research and Development and chief scientific officer at Amgen. "The data highlight tezepelumab's unique capacity to target multiple inflammatory pathways by acting directly at the epithelium, resulting in meaningful symptom relief that can improve patients' daily experiences."

"Patients diagnosed with nasal polyps continue to experience significant burden including repeat surgeries and frequent treatment with high doses of oral corticosteroids, which are associated with serious systemic side effects," said Dr. Brian Lipworth, Professor of Allergy and Pulmonology, Scottish Centre for Respiratory Research, and Tayside Rhinology Ear, Nose and Throat Clinic, Ninewells Hospital University of Dundee in Scotland, UK, and co-primary investigator in the trial. "The tezepelumab data are clinically meaningful and offer patients with nasal polyps hope for a potential new treatment option that may reduce the burden on patients and healthcare systems."

The full results will be shared with regulatory authorities and the scientific community at an upcoming medical meeting.

About the Phase 3 WAYPOINT Trial
WAYPOINT is a double-blind, multi-center, randomized, placebo-controlled, parallel group trial designed to evaluate the efficacy and safety of tezepelumab in adults with severe CRSwNP.¹ Participants received tezepelumab or placebo, administered via subcutaneous injection. The trial also included a post-treatment follow-up period of 12-24 weeks for participants who completed the 52-week treatment period.¹

The co-primary endpoints of the trial were change from baseline in total nasal polyp size, measured by the endoscopic total Nasal Polyp Score, and change from baseline in bi-weekly mean nasal congestion, measured by the participant-reported Nasal Congestion Score evaluated as part of the daily Nasal Polyposis Symptom Diary.¹

Key secondary endpoints included loss of smell; improvement in disease-specific health-related quality of life as measured by SinoNasal Outcome Test (SNOT-22) score; Lund -Mackay score; time to surgery decision and/or systemic corticosteroids for nasal polyposis; time to nasal polyposis surgery decision; time to systemic corticosteroids for nasal polyposis; Nasal Polyposis Symptom Diary total symptom score and pre-bronchodilator FEV1 in patients with comorbid asthma and aspirin-exacerbated respiratory disease/NSAID-exacerbated respiratory disease (NSAID-ERD) at Week 52.¹

About Chronic Rhinosinusitis with Nasal Polyps (CRSwNP [nasal polyps])
CRSwNP is a complex inflammatory disorder characterized by persistent inflammation of the nasal mucosa accompanied by benign growths, called nasal polyps.^2,3 Nasal polyps can block nasal passages and lead to breathing problems, difficulty in sense of smell, nasal discharge, facial pain, sleep disturbance and other adverse effects on quality of life.^4-6

Epithelial dysfunction and inflammation are important characteristics of chronic rhinosinusitis and impede the ability of the epithelium to act as a physical and immunological barrier against the external environment.⁷ Estimates suggest that up to 56% of patients with CRSwNP have comorbid asthma. Thymic stromal lymphopoietin (TSLP) is an epithelial cytokine that has been implicated in shared pathophysiological processes underlying severe asthma and CRSwNP.^6,8

Current treatments for CRSwNP include intranasal and/or systemic corticosteroids, surgery and biologic medication.^4,9-12

About TEZSPIRE^® (tezepelumab-ekko)
TEZSPIRE is a first-in-class human monoclonal antibody that works on the primary source of inflammation: the airway epithelium, which is the first point of contact for viruses, allergens, pollutants and other environmental insults. Specifically, TEZSPIRE targets and blocks TSLP, a key epithelial cytokine that sits at the top of multiple inflammatory cascades and initiates an overreactive immune response to allergic, eosinophilic and other types of airway inflammation associated with severe asthma.^13,14TSLP is released in response to multiple triggers associated with asthma exacerbations, including allergens, viruses and other airborne particles.

Expression of TSLP is increased in the airways of patients with asthma and has been correlated with disease severity.^6,16 Blocking TSLP may prevent the release of pro-inflammatory cytokines by immune cells, resulting in the prevention of asthma exacerbations and improved asthma control.^14-16 By working at the top of the cascade, TEZSPIRE helps stop inflammation at the source and has the potential to treat a broad population of severe asthma patients.^16-18

TEZSPIRE is currently approved for the treatment of severe asthma in the US, EU, Japan, and more than 50 countries across the globe.^19-22 It is approved as a pre-filled, single-use pen and auto-injector for self-administration in the US and EU.^19,20

Beyond severe asthma and CRSwNP, TEZSPIRE is also in development for other potential indications including chronic obstructive pulmonary disease (COPD) and eosinophilic esophagitis (EoE).^{23, 24} In October 2021, tezepelumab was granted Orphan Drug Designation by the FDA for the treatment of EoE. In July 2024, the U.S. FDA granted a Breakthrough Therapy Designation for tezepelumab for the add-on maintenance treatment of patients with moderate to very severe COPD characterised by an eosinophilic phenotype.

About the Amgen and AstraZeneca Collaboration
In 2020, Amgen and AstraZeneca updated the 2012 collaboration agreement for TEZSPIRE. Both companies will continue to share costs and profits equally after payment by AstraZeneca of a mid-single-digit royalty to Amgen. AstraZeneca continues to lead development and Amgen continues to lead manufacturing. All aspects of the collaboration are under the oversight of joint governing bodies. Under the amended agreement, Amgen and AstraZeneca will jointly commercialize TEZSPIRE in North America. Amgen will record product sales in the U.S., with AstraZeneca recording its share of U.S. profits as Collaboration Revenue. Outside of the U.S., AstraZeneca will record product sales, with Amgen recording profit share as Other/Collaboration revenue.

TEZSPIRE^® (tezepelumab-ekko) U.S. Indication

TEZSPIRE is indicated for the add-on maintenance treatment of adult and pediatric patients aged 12 years and older with severe asthma.

TEZSPIRE is not indicated for the relief of acute bronchospasm or status asthmaticus.

TEZSPIRE^® (tezepelumab-ekko) Important Safety Information

CONTRAINDICATIONS

Known hypersensitivity to tezepelumab-ekko or excipients.

WARNINGS AND PRECAUTIONS

Hypersensitivity Reactions

Hypersensitivity reactions were observed in the clinical trials (e.g., rash and allergic conjunctivitis) following the administration of TEZSPIRE. Postmarketing cases of anaphylaxis have been reported. These reactions can occur within hours of administration, but in some instances have a delayed onset (i.e., days). In the event of a hypersensitivity reaction, consider the benefits and risks for the individual patient to determine whether to continue or discontinue treatment with TEZSPIRE.

Acute Asthma Symptoms or Deteriorating Disease

TEZSPIRE should not be used to treat acute asthma symptoms, acute exacerbations, acute bronchospasm, or status asthmaticus.

Abrupt Reduction of Corticosteroid Dosage

Do not discontinue systemic or inhaled corticosteroids abruptly upon initiation of therapy with TEZSPIRE. Reductions in corticosteroid dose, if appropriate, should be gradual and performed under the direct supervision of a physician. Reduction in corticosteroid dose may be associated with systemic withdrawal symptoms and/or unmask conditions previously suppressed by systemic corticosteroid therapy.

Parasitic (Helminth) Infection

It is unknown if TEZSPIRE will influence a patient's response against helminth infections. Treat patients with pre-existing helminth infections before initiating therapy with TEZSPIRE. If patients become infected while receiving TEZSPIRE and do not respond to anti-helminth treatment, discontinue TEZSPIRE until infection resolves.

Live Attenuated Vaccines

The concomitant use of TEZSPIRE and live attenuated vaccines has not been evaluated. The use of live attenuated vaccines should be avoided in patients receiving TEZSPIRE.

ADVERSE REACTIONS

The most common adverse reactions (incidence =3%) are pharyngitis, arthralgia, and back pain.

USE IN SPECIFIC POPULATIONS

There are no available data on TEZSPIRE use in pregnant women to evaluate for any drug-associated risk of major birth defects, miscarriage, or other adverse maternal or fetal outcomes. Placental transfer of monoclonal antibodies such as tezepelumab-ekko is greater during the third trimester of pregnancy; therefore, potential effects on a fetus are likely to be greater during the third trimester of pregnancy.

Please see the full Prescribing Information including Patient Information and Instructions for Use.

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About Amgen
Amgen discovers, develops, manufactures and delivers innovative medicines to help millions of patients in their fight against some of the world's toughest diseases. More than 40 years ago, Amgen helped to establish the biotechnology industry and remains on the cutting-edge of innovation, using technology and human genetic data to push beyond what's known today. Amgen is advancing a broad and deep pipeline that builds on its existing portfolio of medicines to treat cancer, heart disease, osteoporosis, inflammatory diseases and rare diseases.

In 2024, Amgen was named one of the "World's Most Innovative Companies" by Fast Company and one of "America's Best Large Employers" by Forbes, among other external recognitions. Amgen is one of the 30 companies that comprise the Dow Jones Industrial Average^®, and it is also part of the Nasdaq-100 Index^®, which includes the largest and most innovative non-financial companies listed on the Nasdaq Stock Market based on market capitalization.

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SOURCE Amgen