Related Experiment Videos
S100 proteins in Corpora amylacea from normal human brain
D Hoyaux1, C Decaestecker, C W Heizmann
1Laboratory of Histopathology, Erasmus University Hospital, Faculty of Medicine, Université Libre de Bruxelles CP 620, 808 route de Lennik, 1070, Brussels, Belgium.
Brain Research
|June 6, 2000
Summary
Corpora amylacea (C.A.), or polyglucosan bodies, are linked to brain aging and neurodegeneration. This study found nine S100 proteins within C.A., suggesting a potential inflammatory role in the aging brain.
Area of Science:
- Neuroscience
- Cell Biology
- Biochemistry
Background:
- Corpora amylacea (C.A.), also known as polyglucosan bodies (P.B.), are common in normal brain aging and increase in neurodegenerative diseases.
- C.A. are primarily composed of hexoses and proteins, including aging/stress proteins and advanced glycation end products, which can be proinflammatory.
- S100 proteins are implicated in inflammatory processes, prompting an investigation into their presence in C.A.
Purpose of the Study:
- To investigate the presence and distribution of ten different S100 proteins within Corpora amylacea (C.A.) in the normal human brain.
- To explore the potential involvement of S100 proteins in the inflammatory processes associated with C.A.
Main Methods:
- Immunohistochemistry was employed to detect ten specific S100 proteins (S100A1-A6, S100A8-A9, S100A12, S100B).
- Computer-assisted microscopy was used to quantify the staining intensity of detected S100 proteins within C.A.
Main Results:
- Nine out of ten S100 proteins (all S100A subtypes) were detected in C.A.
- S100A8, S100A9, and S100A12, known inflammatory markers, were found in C.A.
- S100B was notably absent in C.A. despite its presence in astrocytes; S100A1, S100A8, and S100A9 showed the highest staining intensity.
Conclusions:
- The presence of multiple S100 proteins, particularly inflammatory markers, in C.A. suggests a potential role in brain inflammation.
- Further research is warranted to elucidate the specific inflammatory functions of S100 proteins within Corpora amylacea during aging and disease.