Related Experiment Videos
Surface features of human aortic atherosclerosis as seen with scanning electron microscopy
Insights
Scanning human aorta surfaces reveals key features of atherosclerosis, including cell adhesion, tissue remodeling, cholesterol crystals, and potential new blood vessel growth within plaques.
Area of Science:
- Cardiovascular Biology
- Pathology
- Biomedical Imaging
Background:
- Atherosclerosis is a chronic inflammatory disease characterized by plaque buildup in arteries.
- Understanding the surface morphology of atherosclerotic lesions is crucial for elucidating disease mechanisms.
Purpose of the Study:
- To investigate the surface ultrastructure of human atherosclerotic aorta lesions using Scanning Electron Microscopy (SEM).
- To identify key morphological features associated with advanced human atherogenesis.
Main Methods:
- Human aortas (n=9, ages 59-84) were obtained post-mortem.
- Scanning Electron Microscopy (SEM) was employed to examine the lumenal surface of atherosclerotic lesions.
Main Results:
- Observed leukocyte adhesion to the endothelial surface.
- Identified de-endothelialized areas with evidence of elastogenesis and elastolysis.
- Detected abundant extracellular cholesterol-ester crystals.
- Noted cave-like structures suggesting possible capillarization within thrombotic plaques.
Conclusions:
- SEM provides valuable insights into the complex surface topography of human atherosclerotic lesions.
- Detailed morphological analysis aids in interpreting the mechanisms of human atherogenesis.
- Further studies correlating SEM findings with detailed morphology could enhance understanding of plaque development.
Abstract:
Using SEM, we have observed surface structures of atherosclerotic lesions of human aortas obtained from autopsies ranging from 59 to 84 years of age (5 males and 4 females). We have found four major interesting features on the lumenal surface of the aortas: 1) blood cells including leukocytes adhering to the endothelial surface, 2) a de-endothelialized surface showing both elastogenesis and elastolysis, 3) abundant cholesterol-ester crystals in extracellular spaces, and 4) cave-like structures possibly suggesting new capillarization in the thrombotic atherosclerotic plaques. We concluded that SEM has a great value in revealing more interesting surface structures if morphological studies are previously done in detail so that the characteristic shapes can be identified, and perhaps then meaningful interpretations can be made on the mechanism of human atherogenesis.