INVESTORS & MEDIA
Regeneron and Alnylam Report Positive Interim Phase 1 Clinical Data on ALN-APP, an Investigational RNAi Therapeutic for Alzheimer’s Disease and Cerebral Amyloid Angiopathy
- Single Doses of ALN-APP Demonstrated Dose-Dependent, Rapid and Sustained Reduction of sAPPα and sAPPβ in Cerebrospinal Fluid, with Up to 90% at Highest Dose to Date -
- Encouraging Clinical Safety and Tolerability Profile Observed with Single Dosing to Date -
- Results Provide First Demonstration of Gene Silencing by RNAi Therapeutics in the Human Brain Using Alnylam's Proprietary C16 Platform -
Twenty patients have been enrolled in three single-dose cohorts in Part A of the ongoing Phase 1 study in patients with early-onset Alzheimer’s disease. In this study to date, single doses of ALN-APP, which are administered by intrathecal injection, have been well tolerated. All adverse events were mild or moderate in severity, with available cerebrospinal fluid data for white blood cells and protein appearing similar to placebo. Early data for neurofilament light chain from a subset of cohorts (2 of 3 studied) looked comparable to placebo. Patients treated with ALN-APP experienced dose-dependent, rapid and sustained reduction in cerebrospinal fluid of both soluble APPα (sAPPα) and APPβ (sAPPβ), biomarkers of target engagement, with maximum reduction of 84% and 90%, respectively. Median decreases of both biomarkers of greater than 70% was sustained for at least three months at the highest dose tested. Detailed interim results from this study are planned to be reported at an upcoming scientific conference.
“ALN-APP, via its upstream targeting mechanism, has the potential to address the underlying cause of two devastating CNS diseases, Alzheimer’s disease and CAA, which affect many millions of people and their families around the world. Thus, we are excited by these interim clinical data for ALN-APP, which demonstrate rapid, substantial and sustained target protein reduction and encouraging safety and tolerability to date,” said
These early results establish the first human translation of
“Establishing human proof of concept with ALN-APP is a major step in our efforts to expand our organic product engine to extrahepatic tissues like the CNS, a critical goal in our P5x25 strategy,” said
“When we entered into this collaboration, the idea that you could profoundly silence disease-causing genes in the brain was simply a bold dream. The current data suggest that this dream is closer to becoming a reality, offering hope for the many patients suffering from incurable neurological diseases,” said
Further exploration of single-doses of ALN-APP is ongoing in Part A of the Phase 1 study (
In addition to ALN-APP, Regeneron and
About the Phase 1 Study of ALN-APP
The Phase 1 study is a multi-center, randomized, double-blind, placebo-controlled trial designed to evaluate the safety, tolerability, pharmacokinetic, and pharmacodynamic effects of ALN-APP in patients with early-onset Alzheimer’s disease (EOAD). The study is being conducted in two parts: single ascending dose phase and multiple dose phase in patients with EOAD. The planned enrollment for this study is up to 60 patients.
The interim readout of the Phase 1 study of ALN-APP is focused on assessing safety, tolerability and levels of target engagement biomarkers, sAPP and sAPP.
ALN-APP is an investigational, intrathecally administered RNAi therapeutic targeting amyloid precursor protein (APP) in development for the treatment of Alzheimer’s disease (AD) and cerebral amyloid angiopathy (CAA). Genetic mutations that increase production of APP or alter its cleavage cause early-onset AD, early-onset CAA, or both. ALN-APP is designed to decrease APP mRNA in the central nervous system (CNS), to decrease synthesis of APP protein and all downstream intracellular and extracellular APP-derived cleavage products, including amyloid beta (Aβ). Reducing APP protein production is expected to reduce the secretion of Aβ peptides that aggregate into extracellular amyloid deposits and reduce the intraneuronal APP cleavage products that trigger the formation of neurofibrillary tangles and cause neuronal dysfunction in Alzheimer’s disease. ALN-APP is the first program utilizing Alnylam’s proprietary C16-siRNA conjugate technology, which enables enhanced delivery to cells in the CNS. This program is being developed in collaboration between
About Alzheimer’s Disease
Alzheimer’s disease (AD) is the most common neurodegenerative disease and the most common form of dementia, affecting over 30 million people worldwide. AD is characterized by progressive memory loss and cognitive decline, with neuropathological accumulation of amyloid plaques, neurofibrillary tangles, and neuroinflammation, ultimately resulting in significant brain atrophy. Disease progression results in progressive loss of independence, increased caregiver burden, institutionalization, and premature death. Early-onset Alzheimer’s disease (EOAD) refers to a subgroup of AD with symptom onset prior to the age of 65, representing approximately 4% to 6% of all AD. EOAD is the leading cause of dementia in younger individuals and is a significant cause of disability and early mortality. Available treatment options include symptomatic treatment and treatment to reduce amyloid deposits in the brain. There are currently no available treatments that have been shown to halt or reverse the progression of the disease.
About Cerebral Amyloid Angiopathy
Cerebral amyloid angiopathy (CAA) is the second most-common cause of hemorrhagic stroke. CAA is defined by progressive deposition of amyloid beta (Aβ) into the walls of small arteries, arterioles, and capillaries in the brain, causing impaired vascular reactivity, focal tissue damage, and increased risk for intracerebral hemorrhage. CAA has also been shown to be an independent contributor to cognitive impairment. There are currently no available treatment options for CAA.
RNAi (RNA interference) is a natural cellular process of gene silencing that represents one of the most promising and rapidly advancing frontiers in biology and drug development today. Its discovery has been heralded as "a major scientific breakthrough that happens once every decade or so," and was recognized with the award of the 2006 Nobel Prize for Physiology or Medicine. By harnessing the natural biological process of RNAi occurring in our cells, a new class of medicines, known as RNAi therapeutics, is now a reality. Small interfering RNA (siRNA), the molecules that mediate RNAi and comprise
Regeneron (NASDAQ: REGN) is a leading biotechnology company that invents, develops and commercializes life-transforming medicines for people with serious diseases. Founded and led for nearly 35 years by physician-scientists, our unique ability to repeatedly and consistently translate science into medicine has led to nine FDA-approved treatments and numerous product candidates in development, almost all of which were homegrown in our laboratories. Our medicines and pipeline are designed to help patients with eye diseases, allergic and inflammatory diseases, cancer, cardiovascular and metabolic diseases, pain, hematologic conditions, infectious diseases and rare diseases.
Regeneron is accelerating and improving the traditional drug development process through our proprietary VelociSuite® technologies, such as VelocImmune®, which uses unique genetically humanized mice to produce optimized fully human antibodies and bispecific antibodies, and through ambitious research initiatives such as the Regeneron Genetics Center, which is conducting one of the largest genetics sequencing efforts in the world.
For more information, please visit www.Regeneron.com or follow @Regeneron on Twitter.
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This press release discusses investigational RNAi therapeutics and is not intended to convey conclusions about efficacy or safety as to those investigational therapeutics. There is no guarantee that any investigational therapeutics will successfully complete clinical development or gain health authority approval.
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Source: Regeneron Pharmaceuticals, Inc.