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Study Identifies Midkine as Direct Inhibitor of Alzheimer’s Amyloid Assembly

A Nature Structural & Molecular Biology paper pinpoints the specific assembly steps blocked, informing small‑molecule mimetic design.

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Overview

  • Scientists report that midkine prevents amyloid‑beta from sticking together and lowers its accumulation in Alzheimer’s disease models.
  • Kinetic modeling of thioflavin T fluorescence data indicates blocked elongation and secondary nucleation, a result corroborated by NMR.
  • Complementary biophysical techniques, including circular dichroism and electron microscopy, characterized the disruption of fibril formation.
  • Genetic deletion of the midkine gene in Alzheimer’s mouse models increased amyloid‑beta assemblies, supporting a protective role in vivo.
  • Research teams from St. Jude and Van Andel, backed by NIH and other funders, now aim to map the binding interface to enable small‑molecule development.