Mallinckrodt Receives Approval in Japan of the CELLEX® Extracorporeal Photopheresis System for Treatment of Chronic Graft Versus Host Disease

Mallinckrodt Receives Approval in Japan of the CELLEX® Extracorporeal Photopheresis System for Treatment of Chronic Graft Versus Host Disease

DUBLIN – January 27, 2021 – Mallinckrodt plc, a global biopharmaceutical company, announced today that Japan's Ministry of Health, Labour and Welfare (MHLW) approved the CELLEX® extracorporeal photopheresis (ECP) system for the treatment of steroid-resistant or intolerant chronic graft versus host disease (cGvHD) in adults.

The approval was based on an open-label study conducted in patients with steroid-resistant or intolerant cGvHD after allogeneic hematopoietic stem cell transplantation at three institutions in Japan. The efficacy rate following evaluation of response and changes in steroid dose 24-weeks after ECP initiation was 66.7 percent (8/12 patients), the primary endpoint of the study. Adverse events were observed in all patients (n=15, 106 events). Most of the adverse events observed were considered as those of the primary disease or associated with long-term treatment with steroids. There were no adverse events unique to this treatment.

“We are very pleased that the CELLEX ECP System has been approved. As a pharmaceutical company focused on improving outcomes for under-served patients with severe and critical conditions, we strive to develop treatment options that address unmet medical needs,” said Masatoyo Gunji, the President of Mallinckrodt Pharma K.K. “Treatment for patients with cGvHD who do not respond to steroids has long been a challenge and is one of the more difficult aspects in treatment of cGvHD. As a new treatment option, we expect the CELLEX ECP System to play an important role in treatment of patients with cGvHD.”

About Chronic Graft Versus Host Disease (cGvHD)
Graft versus host-disease is a common complication of hematopoietic stem cell transplantation (HSCT) resulting in significant morbidity and mortality.1 It can be classified as acute or chronic based on the clinical presentation and the time of occurrence after the transplantation. Signs and symptoms of cGvHD nearly always occur within the first year post transplantation but can occasionally happen several years later.2 In cGvHD, the skin is the most frequently affected organ with manifestations of itchy rash, hyper or hypopigmentation and changes in texture. However, the disease can affect multiple sites, which may have a major impact upon a patient's quality of life.2,3 Chronic GvHD can lead to debilitating consequences, such as joint contractures, loss of sight, end-stage lung disease, or mortality resulting from profound chronic immune suppression leading to recurrent or life-threatening infections.1

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