Overexpression of porcine lipoprotein-associated phospholipase A2 in swine.
Lipoprotein-associated phospholipase A 2 (Lp-PLA2) is associated with the risk of vascular disease. It circulates in human blood predominantly in association with low-density lipoprotein cholesterol (LDL-C) and hydrolyses oxidized phospholipids into pro-inflammatory products. However, in the mouse circulation, it predominantly binds to high-density lipoprotein cholesterol (HDL-C) and exhibits anti-inflammatory properties. To further investigate the effects of Lp-PLA2 in the circulation, we generated over-expressed Lp-PLA2 transgenic swine. The eukaryotic expression plasmid of porcine Lp-PLA2 which driven by EF1α promoter was constructed and generate transgenic swine via SCNT. The expression and activity of Lp-PLA2 in transgenic swine were evaluated, and the total cholesterol (TC), HDL-C, LDL-C and triglyceride (TG) levels in the fasting and fed states were also assessed. Compared with wild-type swine controls, the transgenic swine exhibited elevated Lp-PLA2 mRNA levels and activities, and the activity did not depend on the feeding state. The TC, HDL-C and LDL-C levels were not significantly increased. There was no change in the TG levels in the fasting state between transgenic and control pigs. However, in the fed state, the TG levels of transgenic swine were slightly increased compared with the control pigs and were significantly elevated compared with the fasting state. In addition, inflammatory gene (interleukin [IL]-6, monocyte chemotactic protein [MCP]-1 and tumor necrosis factor [TNF]-α) mRNA levels in peripheral blood mononuclear cells (PBMCs) were significantly increased. The results demonstrated that Lp-PLA2 is associated with triglycerides which may be helpful for understanding the relationship of this protein with cardiovascular disease.
Jilin Provincial Key Laboratory of Animal Embryo Engineering, College of Animal Sciences, Jilin University, China.
Xiaochun
X
Tang
Jilin Provincial Key Laboratory of Animal Embryo Engineering, College of Animal Sciences, Jilin University, China.
Gangqi
G
Wang
Jilin Provincial Key Laboratory of Animal Embryo Engineering, College of Animal Sciences, Jilin University, China.
Xingxing
X
Liu
Jilin Provincial Key Laboratory of Animal Embryo Engineering, College of Animal Sciences, Jilin University, China.
Xiaolei
X
Han
Jilin Provincial Key Laboratory of Animal Embryo Engineering, College of Animal Sciences, Jilin University, China.
Zhuang
Z
Li
Jilin Provincial Key Laboratory of Animal Embryo Engineering, College of Animal Sciences, Jilin University, China.
Guangyao
G
Ran
Jilin Provincial Key Laboratory of Animal Embryo Engineering, College of Animal Sciences, Jilin University, China.
Zhanjun
Z
Li
Jilin Provincial Key Laboratory of Animal Embryo Engineering, College of Animal Sciences, Jilin University, China.
Qi
Q
Song
Jilin Provincial Key Laboratory of Animal Embryo Engineering, College of Animal Sciences, Jilin University, China.
Yuan
Y
Ji
Jilin Provincial Key Laboratory of Animal Embryo Engineering, College of Animal Sciences, Jilin University, China.
Haijun
H
Wang
Institute of Cardiovascular Sciences and Key Laboratory of Molecular Cardiovascular Sciences, Peking University Health Science Center, China.
Yuhui
Y
Wang
Jilin Provincial Key Laboratory of Animal Embryo Engineering, College of Animal Sciences, Jilin University, China.
Hongsheng
H
Ouyang
Jilin Provincial Key Laboratory of Animal Embryo Engineering, College of Animal Sciences, Jilin University, China. Electronic address: pdx@jlu.edu.cn.
Daxin
D
Pang
D043203:1-Alkyl-2-acetylglycerophosphocholine Esterase / Q000235:genetics* / Q000276:immunology*; D000818:Animals; D030801:Animals, Genetically Modified / Q000235:genetics / Q000276:immunology; D002478:Cells, Cultured; D016207:Cytokines / Q000276:immunology*; D007963:Leukocytes, Mononuclear / Q000276:immunology*; D013552:Swine / Q000235:genetics* / Q000276:immunology*; D015854:Up-Regulation / Q000235:genetics
D016207:Cytokines; D043203:1-Alkyl-2-acetylglycerophosphocholine Esterase
Lipoprotein-associated phospholipase A 2; Transgenic swine; Triglyceride