Detection of lipofuscin-like fluorophore in oxidized human low-density lipoprotein. 4-hydroxy-2-nonenal as a potential source of fluorescent chromophore.
FEBS Lett
; 473(2): 249-53, 2000 May 12.
Article
en En
| MEDLINE
| ID: mdl-10812084
ABSTRACT
It has recently been shown that the lipid peroxidation product 4-hydroxy-2-nonenal (HNE) forms a fluorescent hydroxyiminodihydropyrrole derivative with the epsilon-amino group of lysine residue. In this study, we raised a monoclonal antibody (mAb2C12) directed to the fluorophore-protein conjugate and found that the antibody was specific to the chromophore structure of the compound. Immunohistochemical analysis of atherosclerotic lesions from the human aorta showed that the fluorophore was indeed present in the lesions, in which intense positivity was primarily associated with macrophage-derived foam cells and thickening of the neointima of the arterial walls. Antigenic materials were also detected in the oxidatively modified low-density lipoprotein (LDL) with Cu(2+) and in the oxidatively modified bovine serum albumin with an iron/linoleic acid autoxidation system, indicating that the HNE, which originated from the peroxidation of polyunsaturated fatty acids, could be a potential source of the fluorescent chromophore in oxidized LDL.
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Banco de datos:
MEDLINE
Asunto principal:
Aldehídos
/
Lipofuscina
/
Lipoproteínas LDL
Tipo de estudio:
Diagnostic_studies
Límite:
Aged
/
Animals
/
Child, preschool
/
Humans
/
Male
Idioma:
En
Año:
2000
Tipo del documento:
Article