First patients dosed in three dermatology trials evaluating Fasenra in bullous pemphigoid, atopic dermatitis and chronic spontaneous urticaria

Fasenra being evaluated in nine eosinophilic diseases beyond severe asthma

The first patients have been dosed in the Phase III Fasenra (benralizumab) clinical trial in bullous pemphigoid (BP), and in two Phase II trials in atopic dermatitis (AD) and chronic spontaneous urticaria (CSU).

These skin diseases are associated with a range of debilitating symptoms that pose a significant medical burden to patients and often negatively impact their quality of life.^1-4

With these milestones achieved, there are now nine Phase II and Phase III trials underway exploring Fasenra’s potential in diseases beyond severe asthma in patients whose disease may be driven by eosinophilic immune dysfunction (EID).

EID is observed across a spectrum of conditions and is characterised by the dysregulation of biological mechanisms involved with eosinophil recruitment and activation that enable eosinophils to infiltrate patients’ blood and tissue to cause and worsen disease in a range of tissues and organ systems throughout the body. Conditions in which EID is observed have complex pathogenic mechanisms which include but may not be limited to eosinophil-mediated organ damage and dysfunction.^5,6

Mene Pangalos, Executive Vice President, BioPharmaceuticals R&D, said: “Bullous pemphigoid, atopic dermatitis, and chronic spontaneous urticaria continue to represent a significant burden to millions of people worldwide. These trials may provide future treatment options as we follow the science to better understand the role of eosinophils in these often debilitating skin diseases. This progress is yet another important step towards our ambition to bring Fasenra to patients beyond severe asthma, through our extensive clinical programme covering a broad range of dermatological, gastrointestinal and systemic inflammatory illnesses.”

Beyond severe asthma, ten clinical trials in nine eosinophilic diseases are now underway or completed to investigate the potential of Fasenra:

Fasenra is currently approved as an add-on maintenance treatment for severe eosinophilic asthma in the US, EU, Japan and other countries¹⁷ and is approved for self-administration in the US¹⁸ and EU.¹⁹ The FDA granted Orphan Drug Designation for Fasenra for EGPA (November 2018),²⁰ HES (February 2019)²¹ and EoE (August 2019).²²

EID
Eosinophilic immune dysfunction (EID) is characterised as the dysregulation of biological mechanisms involved with eosinophil recruitment and activation that may be driving a diverse range of inflammatory diseases. Examples include severe eosinophilic asthma, chronic rhinosinusitis with nasal polyps (CRSwNP), EoE, EGPA, BP, AD and others. These disorders have complex pathogenic mechanisms, including but not limited to eosinophil-mediated organ damage and dysfunction.

AD
Also known as eczema, AD is a chronic disease that causes the skin to become inflamed, irritated, and itchy, which for many patients can be painful and lead to emotional stress and infections.¹ Half of patients with moderate to severe eczema also suffer from asthma, hay fever (allergic rhinitis), and food allergies.¹ AD is associated with elevated levels of blood eosinophils in most patients, and there is a suggestion that higher levels correlate with disease activity.²³

Current treatments seek to clear skin inflammation and itching, improve quality of life, and often include topical creams and lotions, antihistamines, topical and oral corticosteroids (OCS) and biologic medicines that can help to reduce inflammation.²³

BP
BP is a rare, autoimmune, chronic skin disorder characterised by blistering, urticarial lesions (hives) and itching. The disorder typically occurs in elderly patients with an average patient age of 80 years.² Eosinophilic infiltration in the skin is a prominent feature of BP and believed to contribute to the itching and skin blistering observed.²⁴

There are currently no therapies specifically approved for BP, however certain medicines can reduce itching and formation of new blisters, but do not address underlying causes of the disease. The most commonly used treatments are topical and OCS, which are poorly tolerated when taken chronically in the elderly population.²

COPD
COPD is a progressive disease which can cause obstruction of airflow in the lungs resulting in debilitating bouts of breathlessness.²⁵ It affects an estimated 384 million people worldwide²⁶ and is predicted to be the third leading cause of death by 2020.²⁷ Improving lung function, reducing exacerbations and managing daily symptoms such as breathlessness are important treatment goals in the management of COPD.²⁵ Elevated levels of eosinophils in the tissue and blood are thought to be indicated in the pathophysiology of COPD.^28,29

An estimated 40% of moderate to severe COPD patients on triple inhaled therapy - inhaled corticosteroid (ICS)/long-acting muscarinic antagonist (LAMA)/long-acting beta2-agonist (LABA) - remain uncontrolled and continue to experience exacerbations.³⁰ COPD exacerbations, which can significantly impair quality of life and are linked to disease progression, accelerate decline in lung function, and increase hospitalisations and mortality.^31-34

CRSwNP
Chronic rhinosinusitis with nasal polyps (CRSwNP) is characterised by persistent inflammation of the mucous membrane lining the nasal passages and sinuses accompanied by benign growths, called nasal polyps.^35,36 Nasal polyps can block nasal passages and lead to breathing problems, reduction in the sense of smell, nasal discharge, sleep disturbance and other adverse effects on quality of life.^37-39 Eosinophilic infiltration of the tissues is thought to play a role in the disease pathophysiology.^36,37

Current treatments for nasal polyps include intranasal or OCS and surgery to remove polyps, but these often do not address the underlying cause of the disease and the need for repeated interventions can be high.^40,41 Since 2019, other biologic medicines have been approved or recommended to treat nasal polyps.^38,42

CSU
CSU is a dermatological condition where hives, welts, or swelling under the skin form on the skin and last for more than six weeks. Hives are itchy and can occur anywhere on the body including the face, extremities, chest, back or face. Hives range in size from just a few millimetres to several centimetres.³ Eosinophil infiltration into the skin tissues and activation play a role in CSU disease pathophysiology.⁴³

CSU has a significant burden on patients’ quality of life including sleep impairments and overall functioning.⁴ Initial treatment approaches include the use of antihistamines. This approach fails to resolve symptoms in more than half of all CSU patients,⁴⁴ and other treatment methods must be considered. When antihistamines are unsuccessful, patients are often treated with corticosteroids, cyclosporine and the FDA-approved biologic omalizumab.⁴⁴

EoE
EoE is a rare, chronic, inflammatory disease of the esophagus characterised by the accumulation of eosinophils in the esophageal lining tissue. The disease results in injury, fibrosis and dysfunction that if not effectively treated can make eating difficult or uncomfortable, potentially leading to chronic pain, difficulty swallowing, poor growth, malnutrition and weight loss.⁴⁵

Patients also find it necessary to significantly modify their diet and eating behaviors to manage the symptoms of the disease. Currently there are no FDA-approved treatments for EoE.⁴⁵

EG/EGE
EG/EGE are rare, chronic, relapsing diseases characterised by inflammation of the stomach and/or small bowel, which result in a variety of non-specific, debilitating gastrointestinal symptoms such as abdominal pain, nausea, vomiting, satiety (feeling overfull), loss of appetite, and diarrhoea.^46-49 EG/EGE symptoms are primarily related to eosinophilic tissue inflammation, which causes tissue injury and remodelling of the stomach and small bowel lining.⁵⁰

There are no approved treatments.⁴⁹ Disease management includes strict dietary changes with more severe patients receiving locally acting or OCS.^46-48

EGPA
EGPA, formerly known as Churg-Strauss Syndrome, is a rare, chronic autoimmune disease that is caused by inflammation of small to medium-sized blood vessels.⁵¹ EGPA can result in damage to multiple organs, including lungs, skin, heart, gastrointestinal tract and nerves.⁵² The most common symptoms and signs include extreme fatigue, weight loss, muscle and joint pain, rashes, nerve pain, sinus and nasal symptoms, and shortness of breath.^51-53 Without treatment, the disease may be fatal.⁵⁴

Elevated levels of blood and tissue eosinophils play a central role in EGPA disease pathophysiology. All patients with EGPA have very high levels of eosinophils at some point in their disease, both in peripheral blood and in affected tissues or organs.⁵¹ People with EGPA usually have asthma that may have developed as an adult, and often have sinus and nasal symptoms.⁵¹

There are few effective medicines for EGPA. Patients are often treated with chronic high-dose OCS and can experience recurrent relapses when attempting to taper off OCS.^51,54 Mepolizumab is currently the only approved biologic medicine for EGPA.⁵⁵

HES
HES is a group of rare disorders in which high numbers of eosinophils are found in the blood and tissue that can cause progressive organ damage over time, and if left untreated, can be fatal.^56,57 HES most commonly impacts the skin, heart, lungs, gastrointestinal tract and central nervous system.⁵⁷

The symptoms of HES may include cough, fever, fatigue, asthma, difficulty breathing, wheezing, recurrent upper respiratory tract infections, abdominal pain, vomiting, diarrhoea, skin rashes, arthritis, muscle aches and joint pain.⁵⁷

The goal of HES treatment is to reduce eosinophils in the blood and tissues, prevent organ damage and slow disease progression.^57,58 HES treatment typically includes glucocorticoids, immunomodulatory therapies and cytotoxic therapies.⁵⁶

Fasenra
Fasenra (benralizumab) is a monoclonal antibody that binds directly to IL-5 receptor alpha on eosinophils and attracts natural killer cells to induce rapid and near-complete depletion of blood and tissue eosinophils in most patients via apoptosis (programmed cell death).^59,60

Fasenra is currently approved as an add-on maintenance treatment for severe eosinophilic asthma in the US, EU, Japan and other countries,¹⁷ and is approved for self-administration in the US,¹⁸ EU¹⁹ and other countries.

Fasenra is in development for other eosinophilic diseases and chronic obstructive pulmonary disease. The US Food and Drug Administration granted Orphan Drug Designation for Fasenra for EGPA (November 2018),²⁰ HES (February 2019)²¹ and EoE (August 2019).²²

Fasenra was developed by AstraZeneca and is in-licensed from BioWa, Inc., a wholly-owned subsidiary of Kyowa Kirin Co., Ltd., Japan.

AstraZeneca in Respiratory & Immunology
Respiratory & Immunology is one of AstraZeneca’s three therapy areas and is a key growth driver for the Company.

AstraZeneca is an established leader in respiratory care, and its inhaled and biologic medicines reached more than 53 million patients in 2019. Building on a 50-year heritage, the Company aims to transform the treatment of asthma and COPD by focusing on earlier biology-led treatment, eliminating preventable asthma attacks, and removing COPD as a top-three leading cause of death. The Company’s early respiratory research is focused on emerging science involving immune mechanisms, lung damage and abnormal cell-repair processes in disease and neuronal dysfunction.

With common pathways and underlying disease drivers across respiratory and immunology, AstraZeneca is following the science from chronic lung diseases to immunology-driven disease areas. The Company’s growing presence in immunology is focused on five mid- to late-stage franchises with multi-disease potential, in areas including rheumatology (including Systemic Lupus Erythematosus), dermatology, gastroenterology, and systemic eosinophilic-driven diseases. AstraZeneca’s ambition in Respiratory & Immunology is to achieve disease modification and durable remission for millions of patients worldwide.

AstraZeneca
AstraZeneca (LSE/STO/Nasdaq: AZN) is a global, science-led biopharmaceutical company that focuses on the discovery, development and commercialisation of prescription medicines, primarily for the treatment of diseases in three therapy areas - Oncology, Cardiovascular, Renal & Metabolism, and Respiratory & Immunology. Based in Cambridge, UK, AstraZeneca operates in over 100 countries and its innovative medicines are used by millions of patients worldwide. Please visit astrazeneca.com and follow the Company on Twitter @AstraZeneca.

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Veeva ID: Z4-32452

Date of Preparation: April 2021