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A Tailored HPLC Purification Protocol That Yields High-purity Amyloid Beta 42 and Amyloid Beta 40 Peptides, Capable of Oligomer Formation
Published on: March 27, 2017
Purification and polypeptide composition of corpora amylacea from aged human brain
1INRS-Santé, Université du Québec, Pointe-Claire, Canada.
Journal of Neuroscience Methods
|January 1, 1990
Summary
Corpora amylacea (CA), or polyglucosan bodies, are found in aging brains. Researchers developed a method to isolate pure CA, revealing approximately 4% protein content with specific abundant polypeptide bands.
Area of Science:
- Neuroscience
- Biochemistry
- Aging Research
Background:
- Corpora amylacea (CA) are polyglucosan bodies that accumulate in the brain, a common occurrence with aging.
- While protein presence in CA is known, its specific nature and composition have remained largely uncharacterized.
Purpose of the Study:
- To develop a method for isolating highly pure corpora amylacea (CA) from human brain tissue.
- To analyze the protein content and composition of purified CA preparations.
Main Methods:
- Utilized sucrose gradient fractionation and Percoll density centrifugation to isolate CA.
- Employed SDS-PAGE (Sodium dodecyl sulfate-polyacrylamide gel electrophoresis) for protein analysis.
Main Results:
- Successfully obtained highly pure preparations of corpora amylacea (CA).
- Determined that protein constitutes approximately 4% of the isolated CA by weight.
- Identified several polypeptide bands via SDS-PAGE, with prominent bands at 133, 94, 42, and 24 kDa.
Conclusions:
- Established a reliable method for obtaining pure CA suitable for detailed biochemical analysis.
- Characterized the protein components of CA, providing a foundation for future research into their function and origin.
