إدارة الغذاء والدواء الأمريكية تجيز دواء لمرض الزهايمر
FDA
Today, the U.S. Food and Drug Administration approved Aduhelm (aducanumab) for the treatment of Alzheimer’s, a debilitating disease affecting 6.2 million Americans. Aduhelm was approved using the accelerated approval pathway, which can be used for a drug for a serious or life-threatening illness that provides a meaningful therapeutic advantage over existing treatments. Accelerated approval can be based on the drug’s effect on a surrogate endpoint that is reasonably likely to predict a clinical benefit to patients, with a required post-approval trial to verify that the drug provides the expected clinical benefit.
“Alzheimer’s disease is a devastating illness that can have a profound impact on the lives of people diagnosed with the disease as well as their loved ones,” said Patrizia Cavazzoni, M.D., director of the FDA’s Center for Drug Evaluation and Research. “Currently available therapies only treat symptoms of the disease; this treatment option is the first therapy to target and affect the underlying disease process of Alzheimer’s. As we have learned from the fight against cancer, the accelerated approval pathway can bring therapies to patients faster while spurring more research and innovation.”
Alzheimer’s is an irreversible, progressive brain disorder that slowly destroys memory and thinking skills, and eventually, the ability to carry out simple tasks. While the specific causes of Alzheimer’s disease are not fully known, it is characterized by changes in the brain—including amyloid plaques and neurofibrillary, or tau, tangles—that result in loss of neurons and their connections. These changes affect a person’s ability to remember and think.
Aduhelm represents a first-of-its-kind treatment approved for Alzheimer’s disease. It is the first new treatment approved for Alzheimer’s since 2003 and is the first therapy that targets the fundamental pathophysiology of the disease.
Researchers evaluated Aduhelm’s efficacy in three separate studies representing a total of 3,482 patients. The studies consisted of double-blind, randomized, placebo-controlled dose-ranging studies in patients with Alzheimer’s disease. Patients receiving the treatment had significant dose-and time-dependent reduction of amyloid beta plaque, while patients in the control arm of the studies had no reduction of amyloid beta plaque.
These results support the accelerated approval of Aduhelm, which is based on the surrogate endpoint of reduction of amyloid beta plaque in the brain—a hallmark of Alzheimer’s disease. Amyloid beta plaque was quantified using positron emission tomography (PET) imaging to estimate the brain levels of amyloid beta plaque in a composite of brain regions expected to be widely affected by Alzheimer’s disease pathology compared to a brain region expected to be spared of such pathology.
The prescribing information for Aduhelm includes a warning for amyloid-related imaging abnormalities (ARIA), which most commonly presents as temporary swelling in areas of the brain that usually resolves over time and does not cause symptoms, though some people may have symptoms such as headache, confusion, dizziness, vision changes, or nausea. Another warning for Aduhelm is for a risk of hypersensitivity reactions, including angioedema and urticaria. The most common side effects of Aduhelm were ARIA, headache, fall, diarrhea, and confusion/delirium/altered mental status/disorientation.
Under the accelerated approval provisions, which provide patients suffering from the disease earlier access to the treatment, the FDA is requiring the company, Biogen, to conduct a new randomized, controlled clinical trial to verify the drug’s clinical benefit. If the trial fails to verify clinical benefit, the FDA may initiate proceedings to withdraw approval of the drug.
Aduhelm was granted Fast Track designation, which seeks to expedite the development and review of drugs that are intended to treat serious conditions where initial evidence showed the potential to address an unmet medical need.
Aduhelm is made by Biogen of Cambridge, Massachusetts.
قنا
واشنطن: وافقت إدارة الغذاء والدواء الأمريكية (FDA)، على دواء جديد لمرض الزهايمر للمرة الأولى منذ ما يقرب من 20 عامًا.
وصدرت موافقة إدارة الغذاء والدواء الأمريكية على استخدام عقار Aducanumab أو Aduhelm التجريبي في المراحل المبكرة من علاج مرض الزهايمر، على الرغم من استنتاج لجنة استشارية من إدارة الغذاء والدواء في العام الماضي أنه لا توجد أدلة كافية لدعم فعالية هذا العلاج.
وقد تم تطوير هذا الدواء من قبل شركتي “بيوجين” الأمريكية و”إيساي” اليابانية، للمرضى الذين يعانون من ضعف إدراكي خفيف، وليس الخرف الشديد، ويهدف إلى إبطاء تقدم مرض الزهايمر وليس فقط تخفيف الأعراض.
وجاءت موافقة إدارة الغذاء والدواء على هذا الدواء باستخدام برنامج “الموافقة المعجلة”، الذي يسمح بالموافقة بشكل أسرع على دواء لمرض خطير أو يهدد الحياة على الرغم من أنه قد تكون هناك حاجة إلى مزيد من الدراسة حول فوائد الدواء.
وقالت الدكتورة باتريزيا كافازوني مديرة مركز تقييم الأدوية في إدارة الغذاء والدواء، في بيان صحفي، إنه “كان هناك نقاش عام كبير حول ما إذا كان يجب الموافقة على Aduhelm. كما هو الحال في كثير من الأحيان عندما يتعلق الأمر بتفسير البيانات العلمية، قدم مجتمع الخبراء وجهات نظر مختلفة”.
وأضافت: “في نهاية الأمر، اتبعنا مسار عملنا المعتاد عند اتخاذ قرارات تنظيمية في المواقف التي لا تكون فيها البيانات واضحة”، مشيرة إلى أن إدارة الغذاء والدواء قررت في النهاية استخدام الموافقة المعجلة و”خلصت إلى أن فوائد Aduhelm لمرضى الزهايمر تفوق مخاطر العلاج”.
وتابعت “نتيجة لموافقة إدارة الغذاء والدواء على Aduhelm، فإن مرضى الزهايمر لديهم علاج جديد مهم وحاسم للمساعدة في مكافحة هذا المرض، وستواصل إدارة الغذاء والدواء مراقبة Aduhelm مع وصوله إلى السوق والمرضى”.
