Proteomics identification of carbonylated and HNE-bound brain proteins in Alzheimer's disease.
Free radicals and oxidative stress play a crucial role in the pathophysiology of a wide variety of diseases including cancer and neurodegenerative disorders. Reactive oxygen and reactive nitrogen species can react with biomolecules such as proteins, lipids, nucleic acid, etc. resulting in the formation of protein carbonyls, 3-nitrotyroine, HNE-bound proteins, etc. Such modifications in proteins often lead to functional impairment, and the identification of such oxidatively modified proteins may help in delineating the mechanism of disease 1pathogenesis or progression.In this chapter, we described the protocol for the identification of oxidatively modified proteins, i.e., protein carbonyls and HNE-bound proteins in a given biological sample using three important techniques, i.e., proteomics coupled with mass spectrometry and immunochemical detection. These methods are placed in the context of our studies on Alzheimer's disease.
Sultana
Rukhsana
R
Department of Chemistry, Sanders-Brown Center on Aging, University of Kentuck, Lexington, KY, USA.
Butterfield
D Allan
DA
D000447:Aldehydes / Q000378:metabolism*; D000544:Alzheimer Disease / Q000378:metabolism / Q000503:physiopathology*; D001923:Brain Chemistry; D015853:Cysteine Proteinase Inhibitors / Q000378:metabolism*; D015180:Electrophoresis, Gel, Two-Dimensional / Q000379:methods; D006801:Humans; D007525:Isoelectric Focusing / Q000379:methods; D013058:Mass Spectrometry / Q000379:methods; D015394:Molecular Structure; D009419:Nerve Tissue Proteins / Q000737:chemistry / Q000378:metabolism*; D010084:Oxidation-Reduction; D050050:Protein Carbonylation; D040901:Proteomics / Q000379:methods*
D000447:Aldehydes; D015853:Cysteine Proteinase Inhibitors; D009419:Nerve Tissue Proteins; C027576:4-hydroxy-2-nonenal