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Kyowa Kirin and Amgen Present Positive Late-Breaking Data from Phase 2 Study of KHK4083/AMG 451 in Adult Patients with Moderate-to-Severe Atopic Dermatitis at EADV Congress

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Release Time:2021-10-08
The number of readers:809

TOKYO & THOUSAND OAKS, Calif,--(BUSINESS WIRE)--Kyowa Kirin Co., Ltd. (TSE:4151) and Amgen (NASDAQ: AMGN) today announced that positive data from a Phase 2 study of KHK4083/AMG 451 were presented at the European Academy of Dermatology and Venereology 30th Virtual Congress on Oct. 2, 2021. KHK4083/AMG 451 is a potential first-in-class anti-OX40 fully human monoclonal antibody in development for the treatment of moderate-to-severe atopic dermatitis.

The Phase 2, multicenter, randomized, double-blind, placebo-controlled trial investigated the efficacy and safety of KHK4083 / AMG 451 in adults with moderate-to-severe atopic dermatitis who were not adequately controlled with topical agents. The study met the primary objective, showing statistically greater improvements from baseline in Eczema Area and Severity Index (EASI) score at 16 weeks with all four subcutaneous doses of KHK4083/AMG 451 compared with placebo (600 mg every two weeks (Q2W) = -57.4%*; 600 mg Q4W = -49.7%*; 300 mg Q2W = -61.1%*; 150 mg Q4W = -48.3%*; placebo = -15%).

All treatment groups of patients treated with KHK4083/AMG 451 generally achieved improvements compared to placebo at week 16 for key secondary endpoints, such as achieving at least a 75% reduction from baseline in EASI score (EASI-75) , an Investigator Global Assessment (IGA) score of 0 (clear) or 1 (almost clear) with at least 2-point reduction from baseline (IGA 0/1) and at least a 4-point reduction from baseline in pruritus Numerical Rating Scale (NRS) score (PNRS-4). Efficacy measures continued to improve after week 16 for all KHK4083/AMG 451 doses.

The most commonly reported adverse events that occurred in at least 5% of patients were pyrexia, nasopharyngitis worsening of atopic dermatitis and chills. The events of pyrexia and chills were mild to moderate in intensity and did not lead to treatment discontinuations.

“The Phase 2 results are both positive and exciting. They show improvement across all 4 dose groups compared to placebo, and highlight the potential of OX40 antagonism to help patients,” said the lead investigator of this study, Dr. Emma Guttman-Yassky, MD./PhD., System Chair for the Department of Dermatology and Waldman Professor of Dermatology and Immunology, Icahn School of Medicine at Mount Sinai and Director of the Center for Excellence in Eczema, and the Laboratory of Inflammatory Skin Diseases at Mount Sinai. “I hope that future clinical development data will further elucidate the significance and potential of KHK4083/AMG 451 in the treatment of moderate-to-severe atopic dermatitis.”

“We are very pleased to present data from our Phase 2 study assessing the efficacy and safety of KHK4083/AMG 451 in chronic, recurrent, moderate to severe atopic dermatitis at the EADV congress,” said Yoshifumi Torii, Ph.D., Executive Officer, Vice President, Head of R&D Division of Kyowa Kirin. “The results show inhibition and deletion of the OX40-expressing cells may provide an important new approach to treating moderate-to-severe atopic dermatitis, with the potential to help patients maintain responses.”

“Atopic dermatitis affects over 30 million people a year and is known to have an extremely negative impact on patients’ lives," said David M. Reese, M.D., executive vice president of Research and Development at Amgen. “These data provide strong evidence of the potential of KHK4043/AMG 451 for patients, and we look forward to studying this treatment further in Phase 3 clinical trials, which we expect to begin in the first half of 2022.”

* P<0.001 for KHK4083 vs placebo

About the KHK4083/AMG 451 Phase 2 Study
The Phase 2, multicenter, randomized, double-blind, placebo-controlled trial (NCT03703102) investigated the efficacy and safety of KHK4083/AMG 451 in adults with moderate-to-severe atopic dermatitis who were not adequately controlled with topical agents. The study randomized 274 patients in the U.S., Japan, Canada and Germany across four dose-ranging active treatment groups, which received subcutaneous KHK4083/AMG 451 (600 mg Q2W, 600 mg Q4W, 300 mg Q2W or150 mg Q4W), and a comparator placebo arm.

The primary endpoint was percentage change from baseline in EASI score at week 16. Additional endpoints include achievement of ≥ 75% reduction (improvement) from baseline in EASI score, IGA score of 0 (clear) or 1 (almost clear) with ≥ 2 points reduction from baseline, and ≥ 4 points reduction from baseline in the pruritus numeric rating scale (NRS) score. Patients in the study were followed up to week 56.

The presentation slides are available on the EADV website: https://www.eadvcongress2021.org/

Dr. Emma Guttman-Yassky is the leading investigator of the study and a paid consultant for the KHK4083/AMG 451 development by Kyowa Kirin.

About Atopic Dermatitis
Atopic dermatitis is a chronic inflammatory disease that causes excessively dry, itchy skin that can be painful. Repeated scratching can cause the skin to thicken, harden or become vulnerable to infection. Atopic dermatitis is the most common form of eczema – affecting 1-3% of adults worldwide – and the prevalence is increasing. The disease typically manifests in childhood followed by other allergy symptoms.

About KHK4083/AMG 451
KHK4083/AMG 451 is an anti-OX40 fully human monoclonal antibody engineered with Kyowa Kirin’s patented POTELLIGENT® defucosylation technology to enhance its antibody-dependent cellular cytotoxicity (ADCC) activity. The initial KHK4083/AMG 451 antibody was discovered in collaboration between Kyowa Kirin US Research and La Jolla Institute for Immunology .

KHK4083/AMG 451 targets and inhibits the activity of the OX40 receptor expressed on the surface of effector T-cells, and has been shown to enhance the depletion of activated OX40+ T-cells by ADCC. It has been reported that effector T cells expressing OX40 are present in the lesions of patients with atopic dermatitis and are critical in the disease pathophysiology.

Amgen and Kyowa Kirin Collaboration
On June 1, 2021, Kyowa Kirin and Amgen entered into an agreement to jointly develop and commercialize KHK4083/AMG 451. Under the terms of the agreement, Amgen will lead the development, manufacturing, and commercialization for KHK4083/AMG 451 for all markets globally, except Japan, where Kyowa Kirin will retain all rights. If approved, the companies will co-promote the asset in the United States and Kyowa Kirin has opt-in rights to co-promote in certain other markets including Europe and Asia.

About Kyowa Kirin
Kyowa Kirin strives to create and deliver novel medicines with life-changing value. As a Japan-based Global Specialty Pharmaceutical Company with a more than 70-year heritage, we apply cutting-edge science including expertise in antibody research and engineering, to address the needs of patients and society across multiple therapeutic areas including Nephrology, Oncology, Immunology/Allergy and Neurology. Across our four regions – Japan, Asia Pacific, North America and EMEA/International – we focus on our purpose, to make people smile, and are united by our shared values of commitment to life, teamwork/Wa, innovation, and integrity. You can learn more about the business of Kyowa Kirin at: https://www.kyowakirin.com/.

About Amgen
Amgen is committed to unlocking the potential of biology for patients suffering from serious illnesses by discovering, developing, manufacturing and delivering innovative human therapeutics. This approach begins by using tools like advanced human genetics to unravel the complexities of disease and understand the fundamentals of human biology.

Amgen focuses on areas of high unmet medical need and leverages its expertise to strive for solutions that improve health outcomes and dramatically improve people's lives. A biotechnology pioneer since 1980, Amgen has grown to be one of the world's leading independent biotechnology companies, has reached millions of patients around the world and is developing a pipeline of medicines with breakaway potential.

For more information, visit www.amgen.com and follow us on www.twitter.com/amgen.

Forward-Looking Statements
This news release contains forward-looking statements that are based on the current expectations and beliefs of Amgen. All statements, other than statements of historical fact, are statements that could be deemed forward-looking statements, including any statements on the outcome, benefits and synergies of collaborations, or potential collaborations, with any other company (including BeiGene, Ltd., Kyowa Kirin Co., Ltd., or any collaboration to manufacture therapeutic antibodies against COVID-19), the performance of Otezla® (apremilast) (including anticipated Otezla sales growth and the timing of non-GAAP EPS accretion), the Five Prime Therapeutics, Inc. acquisition, as well as estimates of revenues, operating margins, capital expenditures, cash, other financial metrics, expected legal, arbitration, political, regulatory or clinical results or practices, customer and prescriber patterns or practices, reimbursement activities and outcomes, effects of pandemics or other widespread health problems such as the ongoing COVID-19 pandemic on our business, outcomes, progress, or effects relating to studies of Otezla as a potential treatment for COVID-19, and other such estimates and results. Forward-looking statements involve significant risks and uncertainties, including those discussed below and more fully described in the Securities and Exchange Commission reports filed by Amgen, including our most recent annual report on Form 10-K and any subsequent periodic reports on Form 10-Q and current reports on Form 8-K. Unless otherwise noted, Amgen is providing this information as of the date of this news release and does not undertake any obligation to update any forward-looking statements contained in this document as a result of new information, future events or otherwise.

No forward-looking statement can be guaranteed and actual results may differ materially from those we project. Discovery or identification of new product candidates or development of new indications for existing products cannot be guaranteed and movement from concept to product is uncertain; consequently, there can be no guarantee that any particular product candidate or development of a new indication for an existing product will be successful and become a commercial product. Further, preclinical results do not guarantee safe and effective performance of product candidates in humans. The complexity of the human body cannot be perfectly, or sometimes, even adequately modeled by computer or cell culture systems or animal models. The length of time that it takes for us to complete clinical trials and obtain regulatory approval for product marketing has in the past varied and we expect similar variability in the future. Even when clinical trials are successful, regulatory authorities may question the sufficiency for approval of the trial endpoints we have selected. We develop product candidates internally and through licensing collaborations, partnerships and joint ventures. Product candidates that are derived from relationships may be subject to disputes between the parties or may prove to be not as effective or as safe as we may have believed at the time of entering into such relationship. Also, we or others could identify safety, side effects or manufacturing problems with our products, including our devices, after they are on the market.

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