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This study investigates PMN310, an antibody targeting toxic amyloid-beta oligomers (AβO) in Alzheimer's disease (AD). PRECISE-AD evaluates its safety and efficacy, aiming to offer a new therapy for early AD by potentially reducing ARIA risks.

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Area of Science:

  • Neuroscience
  • Immunology
  • Pharmacology

Background:

  • Toxic amyloid-beta oligomers (AβO) are key drivers in Alzheimer's disease (AD) progression.
  • PMN310 is a novel humanized IgG1 monoclonal antibody targeting a specific epitope on AβO.
  • PMN310's design avoids binding to amyloid plaques, potentially mitigating the risk of amyloid-related imaging abnormalities (ARIA).

Purpose of the Study:

  • To evaluate the safety, tolerability, pharmacokinetics (PK), pharmacodynamics (PD), and preliminary efficacy of PMN310 in patients with early AD.
  • To assess the effects of multiple intravenous infusions of PMN310.
  • To investigate the potential of PMN310 as a therapeutic agent for early-stage Alzheimer's disease.

Main Methods:

  • PRECISE-AD (NCT06750432) is a Phase 2, placebo-controlled, multiple-ascending dose study.
  • 128 patients with Stage 3 or 4 AD will receive 12 infusions of PMN310 (350, 700, or 1400 mg) or placebo every 28 days.
  • Safety assessments include MRI for ARIA detection; biomarkers (plasma and CSF) and cognitive outcomes (CDR-SB, ADAS-cog) will be monitored over 12 months.

Main Results:

  • The study is powered to detect at least one ARIA event.
  • The sample size provides sufficient power for statistically meaningful insights into PMN310's effects on biomarkers and clinical outcomes.

Conclusions:

  • PRECISE-AD is the first study to investigate a monoclonal antibody targeting only AβO.
  • The study will provide crucial data on the impact of PMN310 on AD pathology biomarkers and clinical outcomes.