A Study to Determine the Biodistribution, Safety, and Tolerability of a Microdose of Radiolabeled BIIB080 Co-administered With BIIB080 in Healthy Adults

Biogen

Status and phase: Enrolling; Phase 1

Conditions: Healthy Volunteer

Treatments: Drug: BIIB080; Drug: [89Zr]Zr-DFO-BIIB080

Study type: Interventional

Funder types: Industry

Identifiers

NCT06454721

247HV101

Details and patient eligibility

About

In this study, researchers will learn more about a study drug called BIIB080. BIIB080 is currently a drug under investigation for treatment of Alzheimer's disease. The main question researchers are trying to answer in this study is how radiolabeled BIIB080 distributes in the brain and spinal cord. To help answer this question, researchers will use positron emission tomography (PET) scanner that can detect radiolabeled BIIB080 after a single injection of a small dose of radiolabeled BIIB080 ([89Zr]Zr-DFO-BIIB080) and a dose of BIIB080 together via an intrathecal (IT) injection in healthy volunteers. Researchers will also learn about the safety of injecting radiolabeled BIIB080 and BIIB080 together.

Enrollment: 5 estimated patients

Sex: All

Ages: 18 to 65 years old

Volunteers: Accepts Healthy Volunteers

Inclusion and exclusion criteria

Key Inclusion Criteria:

• Must be healthy adult and have a body mass index (BMI) 18 through 30 kilograms per square meter (kg/m^2).
• Males must practice highly effective contraception and females must be of no childbearing potential.

Key Exclusion Criteria:

• Conditions that influence cerebrospinal fluid (CSF) kinetics e.g., significant scoliosis or a physical disability that limits mobility.
• Contraindication to:
• Magnetic resonance imaging (MRI) scan: e.g., indwelling ferrous metal, implanted medical devices, or claustrophobia.
• Radiation/PET scan: e.g., inability to lie flat or still for the duration of the scan) or intolerance to previous nuclear medicine scans.
• Lumbar Puncture (LP, spinal tap): e.g., current use of a medication that prolongs coagulation times, including aspirin, known disorders of the coagulation cascade, platelet function, or platelet count, low white blood cell counts, chronic low back pain; prior lumbar spine surgery, anatomical factors at or near the spinal tap site, clinical signs of raised intracranial pressure (e.g., headache, or focal neurologic signs).
• Findings from the screening MRI that may interfere with participant safety or the scientific integrity of the study e.g., Chiari malformation, high grade spinal stenosis, hydrocephalus, or neural tube defect.
• Abnormal Laboratory Values e.g., liver functions, anemia, abnormal blood coagulation profile.
• Cardiac, endocrinologic, hematologic, hepatic, immunologic, metabolic, urologic, pulmonary, neurologic, dermatologic, psychiatric, renal, or malignant disease.
• Severe allergic or anaphylactic reactions/ systemic hypersensitivity to BIIB080 or any component of the study treatment.
• Alcohol or substance abuse.
• Plans to undergo elective procedures or surgeries during the study.
• Enrollment in any other drug, biologic, device, or clinical study within 30 days or 5 half-lives, whichever is longer, prior to Check-in.
• Use of any prescription medication (except hormone therapy), over-the-counter medication (excluding acetaminophen), or dietary and herbal supplements (e.g., St. John's wort) within 28 days of the of dosing and during the study.

NOTE: Other protocol defined Inclusion/Exclusion criteria may apply.

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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5 participants in 1 patient group

[89Zr]Zr-DFO-BIIB080 + BIIB080

Experimental group

Description:

Participants will receive a single injection of a small dose of radiolabeled BIIB080 (\[89Zr\]Zr-DFO-BIIB080) along with a dose of BIIB080 together via an intrathecal (IT) injection.

Treatment:

Drug: [89Zr]Zr-DFO-BIIB080

Drug: BIIB080