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http://dx.doi.org/10.1007/s10059-009-0120-1

Proteomic Analysis of the Triglyceride-Rich Lipoprotein-Laden Foam Cells  

Lu, Yanjun (Department of Biochemistry and Molecular Biology, Tongji Medical College, Huazhong University of Science and Technology)
Guo, Jianli (Department of Biochemistry and Molecular Biology, Tongji Medical College, Huazhong University of Science and Technology)
Di, Yong (Department of Biochemistry and Molecular Biology, Tongji Medical College, Huazhong University of Science and Technology)
Zong, Yiqiang (Department of Biochemistry and Molecular Biology, Tongji Medical College, Huazhong University of Science and Technology)
Qu, Shen (Department of Biochemistry and Molecular Biology, Tongji Medical College, Huazhong University of Science and Technology)
Tian, Jun (Department of Biochemistry and Molecular Biology, Tongji Medical College, Huazhong University of Science and Technology)
Publication Information
Molecules and Cells / v.28, no.3, 2009 , pp. 175-181 More about this Journal
Abstract
In hypertriglyceridaemic individuals, atherosclerogenesis is associated with the increased concentrations of very low density lipoprotein (VLDL) and VLDL-associated remnant particles. In vitro studies have suggested that VLDL induces foam cells formation. To reveal the changes of the proteins expression in the process of foam cells formation induced by VLDL, we performed a proteomic analysis of the foam cells based on the stimulation of differentiated THP-1 cells with VLDL. Using two-dimensional gel electrophoresis (2-DE) and matrix-assisted laser-desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) analysis, 14 differentially expressed proteins, containing 8 up-regulated proteins and 6 down-regulated proteins were identified. The proteins are involved in energy metabolism, oxidative stress, cell growth, differentiation and apoptosis, such as adipose differentiation-related protein (ADRP), enolase, S100A11, heat shock protein 27 and so on. In addition, the expression of some selected proteins was confirmed by Western blot and RT-PCR analysis. The results suggest that VLDL not only induces lipid accumulation, but also brings about foam cells diverse characteristics by altering the expression of various proteins.
Keywords
atherosclerogenesis; foam cell; proteomics; THP-1 cell; very low density lipoprotein;
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