Eicosapentaenoic acid modifies lipid composition in caveolae and induces translocation of endothelial nitric oxide synthase
Li, Qiurong; Zhang, Qiang; Wang, Meng; Zhao, Sumin; Ma, Jian; Luo, Nan; Li, Ning; Li, Yousheng; Xu, Guowang; Li, Jieshou; Li JS(黎介寿); Li JS(黎介寿)
KeywordEicosapentaenoic Acid Polyunsaturated Fatty Acids Caveolae Fatty Acid Composition Phospholipids Enos
Source PublicationBIOCHIMIE
Indexed BySCI
Funding Project1808
Contribution Rank2;4
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS SubjectBiochemistry & Molecular Biology
WOS Research AreaBiochemistry & Molecular Biology
AbstractEndothelial nitric oxide synthase (eNOS) plays a crucial role in the regulation of a variety of cardiovascular functions. Many studies have shown that dietary n-3 polyunsaturated fatty acids (PUFAs) have beneficial effects on coronary atherosclerosis. However, the mechanisms of n-3 PUFAs regulation in eNOS activation remain unknown. In the present study we investigated the effects of eicosapentaenoic acid (EPA, 20:5 n-3) on subcellular distribution of eNOS and lipid composition of caveolae. We demonstrated for the first time that EPA treatment profoundly altered lipid composition and fatty acyl substitutions of phospholipids in caveolae. We found that caveolin-1 was solely located in caveolae fractions in control cells, and EPA treatment displaced caveolin-1 from caveolae. eNOS was detected in the caveolin-enriched fractions and noncaveolae fractions in control cells. EPA treatment induced the translocation of eNOS from caveolae fractions to soluble fractions. P-eNOS was also distributed in both fractions. After EPA treatment, the level of p-eNOS in each fraction was increased but the distribution of which was unaffected. Moreover, the results of immunofluorescence confirmed that EPA could redistribute caveolin-1 and eNOS in plasma membrane. eNOS activity in HUVEC cells was increased after EPA treatment, which was in a dose dependent manner. And incubation with 50 mu M EPA had the maximum effect on eNOS activity. Our results suggested that eNOS translocation was paralleled by a stimulated capacity for NO production in the cells. We found that total Akt and p-Akt were primarily presented in heavy membranes in control cells, and the relative level of p-Akt increased but the distribution did not change after EPA treatment. The distribution of CaM was slightly changed after EPA treatment.
WOS IDWOS:000243630100015
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Cited Times:58[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLi JS(黎介寿); Li JS(黎介寿)
Affiliation1.Jinling Hosp, Inst Gen Surg, Nanjing 210002, Peoples R China
2.Chinese Acad Sci, Inst Chem Phys, Natl Chromatog Res & Anal Ctr, Dalian 116011, Peoples R China
3.Nanjing Univ, Sch Med, Nanjing 210093, Peoples R China
Recommended Citation
GB/T 7714
Li, Qiurong,Zhang, Qiang,Wang, Meng,et al. Eicosapentaenoic acid modifies lipid composition in caveolae and induces translocation of endothelial nitric oxide synthase[J]. BIOCHIMIE,2007,89(1):169-177.
APA Li, Qiurong.,Zhang, Qiang.,Wang, Meng.,Zhao, Sumin.,Ma, Jian.,...&黎介寿.(2007).Eicosapentaenoic acid modifies lipid composition in caveolae and induces translocation of endothelial nitric oxide synthase.BIOCHIMIE,89(1),169-177.
MLA Li, Qiurong,et al."Eicosapentaenoic acid modifies lipid composition in caveolae and induces translocation of endothelial nitric oxide synthase".BIOCHIMIE 89.1(2007):169-177.
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