Proteomic analysis of human macrophages exposed to hypochlorite-oxidized low-density lipoprotein.
Biochim Biophys Acta
; 1794(3): 446-58, 2009 Mar.
Article
en En
| MEDLINE
| ID: mdl-19103313
ABSTRACT
The invasion of monocytes through the endothelial wall of arteries and their transformation from macrophage into form cells has been implicated as a critical initiating event in atherogenesis. Human THP-1 monocytic cells can be induced to differentiate into macrophages by phorbol myristate acetate (PMA) treatment, and can be converted into foam cells by exposure to oxidized low-density lipoprotein (oxLDL). To identify proteins potentially involved in atherosclerotic processes, we performed a proteomic analysis of THP-1 macrophages exposed to oxLDL generated by treatment with native LDL with hypochlorous acid/hypochlorite (HOCl/OCl(-)). We detected more than a thousand proteins, of which 104 differentially expressed proteins were identified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF) and the NCBI database. The largest differences in expression were observed for bifunctional purine biosynthesis protein, vacuolar protein sorting 33A, breast carcinoma amplified sequence, adenine phosphoribosyltransferase, and tropomyosin alpha 3 chain. Interestingly, many apoptotic proteins such as lamin B1, poly (ADP-ribose) polymerase, Bcl-2 related protein A1 and vimentin were identified by MALDI-TOF analysis. Identities were confirmed by matching the sequence of several tryptic peptides using MALDI-TOF/TOF MS, Western blot analyses and immunofluorescent microscopy. The data described here will contribute to establishing a functional profile of the human macrophage proteome. Furthermore, the proteins identified in this study are attractive candidates for further biomarkers involved in the pathogenesis of atherosclerosis.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Ácido Hipocloroso
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Proteómica
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Células Espumosas
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Lipoproteínas LDL
Límite:
Humans
Idioma:
En
Revista:
Biochim Biophys Acta
Año:
2009
Tipo del documento:
Article