Related Experiment Video
Updated: Jul 31, 2025
Characterizing Individual Protein Aggregates by Infrared Nanospectroscopy and Atomic Force Microscopy
Published on: September 12, 2019
Intermediate antiparallel beta structure in amyloid plaques revealed by infrared spectroscopic imaging
Brooke Holcombe1, Abigail Foes1, Siddhartha Banerjee1
1Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, AL 35401, USA.
Alzheimer's disease (AD) amyloid plaques were found to contain antiparallel beta-sheet structures, connecting in-vitro findings to AD pathology. This study used infrared imaging to reveal protein structures within plaques.
Area of Science:
- Neuroscience
- Biochemistry
- Medical Imaging
Background:
- Alzheimer's disease (AD) is characterized by amyloid beta (Aβ) plaque aggregation.
- In-vitro studies show mature amyloid fibrils have parallel beta-sheet structures.
- Intermediate Aβ structures, like antiparallel beta-sheets, are known but their presence in AD plaques is unconfirmed.
Conclusions:
- Antiparallel beta-sheet structures are present in Alzheimer's disease amyloid plaques.
- IR imaging is an effective tool for analyzing protein structures in ex-vivo tissues.
- This research links in-vitro amyloid structure to in-vivo AD pathology.
More Related Videos
10:04Imaging Amyloid Tissues Stained with Luminescent Conjugated Oligothiophenes by Hyperspectral Confocal Microscopy and Fluorescence Lifetime Imaging
Published on: October 20, 2017
09:31Visualization of Amyloid β Deposits in the Human Brain with Matrix-assisted Laser Desorption/Ionization Imaging Mass Spectrometry
Published on: March 7, 2019
