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Related Concept Videos

Amyloid Fibrils03:03

Amyloid Fibrils

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Amyloid fibrils are aggregates of misfolded proteins.  Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils. 
Amyloid deposits were observed as early as 1639 in the liver and the spleen.   In 1854, Rudolph Virchow performed iodine staining,...
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Related Experiment Video

Updated: Aug 18, 2025

Fabrication of Amyloid-&#946;-Secreting Alginate Microbeads for Use in Modelling Alzheimer's Disease
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Amyloid-Based Albumin Hydrogels.

Carolina Diaz1,2, Dimitris Missirlis1

  • 1Department of Cellular Biophysics, Max-Planck-Institute for Medical Research, Jahnstr. 29, 69120, Heidelberg, Germany.

Advanced Healthcare Materials
|December 5, 2022
PubMed
Summary
This summary is machine-generated.

Researchers created self-healing hydrogels from bovine serum albumin amyloid fibrils. These biocompatible materials are pH-tunable and support cell growth, offering versatile biomedical applications.

Keywords:
antifoulingcell mechanosensingfibrillar hydrogelsself-assemblysustainable materials

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Area of Science:

  • Biomaterials Science
  • Protein Engineering
  • Nanotechnology

Background:

  • Amyloid fibrils are protein aggregates with unique self-assembly properties.
  • Hydrogels are versatile biomaterials with applications in tissue engineering and drug delivery.
  • Bovine serum albumin (BSA) is an abundant, low-cost, and biocompatible polypeptide.

Purpose of the Study:

  • To develop novel, self-healing hydrogels using BSA-derived amyloid fibrils.
  • To investigate the influence of pH on fibril structure and hydrogel properties.
  • To evaluate the potential of these hydrogels for biomedical applications, including cell culture.

Main Methods:

  • Self-assembly of BSA into amyloid-like fibrils at room temperature.
  • Disulfide bond reduction using tris (2-carboxyethyl) phosphine hydrochloride to induce gelation.
  • Physicochemical characterization of hydrogels, including pH-dependent structural analysis.
  • Functionalization of hydrogel surfaces with fibronectin and assessment of cell adhesion and proliferation.

Main Results:

  • Formation of physically cross-linked, self-healing hydrogels from BSA amyloid fibrils.
  • pH-dependent control over fibril structure and hydrogel surface charge.
  • Successful functionalization with fibronectin, promoting cell adhesion, spreading, and long-term culture.
  • Demonstration of distinct physicochemical properties based on solution pH during self-assembly.

Conclusions:

  • BSA amyloid fibrils provide a simple, versatile, and inexpensive platform for creating advanced hydrogel materials.
  • The pH-tunable nature of these hydrogels allows for tailored physicochemical properties.
  • These albumin-based hydrogels show significant promise for biomedical applications, particularly in cell culture and regenerative medicine.