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Updated: Aug 9, 2026

Rapid Generation of Amyloid from Native Proteins In vitro
05:48

Rapid Generation of Amyloid from Native Proteins In vitro

Published on: December 5, 2013

Extracellular matrix influences the biogenesis of amyloid precursor protein in microglial cells

U Mönning1, R Sandbrink, A Weidemann

  • 1Center for Molecular Biology Heidelberg, University of Heidelberg, Federal Republic of Germany.

The Journal of Biological Chemistry
|March 31, 1995
PubMed

Insights

Beta amyloid precursor protein (APP) is involved in central nervous system immune responses. Microglia interaction with extracellular matrix impacts APP processing, potentially initiating amyloidogenesis in Alzheimer's disease.

Area of Science:

  • Neuroscience
  • Immunology
  • Cell Biology

Background:

  • Beta amyloid precursor protein (APP) is implicated in central nervous system (CNS) immune responses.
  • Microglia are the primary immune effector cells in the CNS.

Purpose of the Study:

  • To investigate the role of APP in microglial immune responses.
  • To analyze APP expression and processing in microglia upon interaction with the extracellular environment.

Main Methods:

  • Utilized the murine microglial cell line BV-2.
  • Examined APP secretion, biogenesis, and catabolism in response to extracellular matrix components (fibronectin, laminin, collagen).
  • Assessed microglial mobility and actin cytoskeleton organization.

Main Results:

  • Extracellular matrix components differentially regulate APP processing in microglia.
  • Fibronectin increased APP secretion and decreased cellular APP.
  • Laminin and collagen decreased APP secretion, leading to cellular APP accumulation and C-terminal fragment buildup.
  • APP dysregulation correlated with impaired microglial mobility and actin network disorganization.

Conclusions:

  • Microglia-extracellular matrix interactions significantly influence APP metabolism.
  • Altered APP processing in microglia may contribute to initial amyloidogenesis events in Alzheimer's disease.
  • APP plays a crucial role in regulating microglial functions like migration and target recognition.

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