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The case for rejecting the amyloid cascade hypothesis.

Karl Herrup1

  • 11] Division of Life Science, Hong Kong University of Science and Technology, Kowloon, Hong Kong. [2] State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Kowloon, Hong Kong.

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Summary

The amyloid cascade hypothesis for Alzheimer's disease (AD) may be inaccurate. This perspective argues for moving beyond amyloid-beta as the central focus for AD research and diagnosis.

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Area of Science:

  • Neurodegenerative diseases
  • Biochemistry
  • Neuropathology
  • Genetics

Background:

  • The amyloid cascade hypothesis posits that amyloid-beta (Aβ) accumulation drives Alzheimer's disease (AD) pathogenesis.
  • This hypothesis has guided AD research for nearly two decades.
  • However, accumulating data present inconsistencies with the linear structure of the amyloid cascade hypothesis.

Purpose of the Study:

  • To critically evaluate the over-reliance on amyloid-beta in defining and diagnosing Alzheimer's disease.
  • To advocate for a re-evaluation and potential rejection of the amyloid cascade hypothesis.

Main Methods:

  • This is a perspective piece, relying on a review and synthesis of existing scientific literature and data.
  • It involves critical analysis of the amyloid cascade hypothesis in light of current research findings.

Main Results:

  • Growing evidence challenges the central role of amyloid-beta as the sole initiator of AD.
  • The current linear model of the amyloid cascade hypothesis may be insufficient to explain AD's complexity.

Conclusions:

  • There is an over-reliance on amyloid-beta for AD definition and diagnosis.
  • The time has come to reconsider and potentially reject the amyloid cascade hypothesis to advance AD research.