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New biologic therapies for Alzheimer's disease (AD) use active transport to deliver drugs across the blood-brain barrier (BBB). This approach enhances amyloid-beta (Aβ) plaque removal, improving treatment efficacy and safety for AD patients.

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Area of Science:

  • Neuroscience
  • Pharmacology
  • Biotechnology

Background:

  • First-generation anti-amyloid-beta (Aβ) therapies show promise for Alzheimer's disease (AD), but efficient amyloid removal is crucial for clinical effect.
  • Delivering large biologic molecules across the blood-brain barrier (BBB) remains a significant challenge in AD drug development.
  • Emerging biologic therapeutics and novel drug delivery methods are being explored to overcome BBB limitations.

Purpose of the Study:

  • To provide an overview of emerging biologic therapeutics for AD.
  • To highlight innovative drug delivery methods for active transport across the BBB.
  • To discuss the potential of enhanced drug delivery for AD treatment.

Main Methods:

  • Focus on active transport mechanisms utilizing antibody fragments targeting the transferrin receptor.
  • Employing receptor-mediated transcytosis to facilitate drug delivery across the BBB.
  • Application of these mechanisms to monoclonal antibodies and antisense oligonucleotides.

Main Results:

  • Demonstrated improved drug distribution in preclinical models with Brainshuttle™ and TransportVehicle™ technologies.
  • Trontinemab, an amyloid-directed Brainshuttle™ antibody fusion, showed proof of concept in humans with AD.
  • Trontinemab exhibited increased brain penetration, amyloid plaque removal, and improved safety in AD patients.

Conclusions:

  • Active transport mechanisms like Brainshuttle™ technology can enable rapid and efficient amyloid clearance in AD.
  • This approach may unlock the full potential of Aβ-targeting monoclonal antibodies for disease modification in AD.
  • Active transport holds promise for improving drug distribution, efficacy, and safety in various large molecule delivery systems.