高脂、炎癥狀態(tài)下Api6在巨噬細胞中的表達研究
[Abstract]:Objective apoptosis inhibitor 6 (Apoptosis Inhibitor 6 (Api6), also known as AIM or Sp 偽, is a new member of scavenger receptor rich cysteine residue family, which plays an important role in immune response and tumorigenesis. However, the role of Api6 as a scavenger receptor in lipid metabolism has not been further studied. In this study, human THP-1 mononuclear / macrophages and mouse RAW264.7 macrophages were used to investigate 1 hyperlipidemia and 2 hyperlipidemia and / or inflammation. The expression of scavenger receptor SR-AG CD36 and Api6 in macrophages was found to be related to the expression of LXR beta and Api6 under hyperlipidemia and / or inflammation. Materials and methods 1. LDLs were extracted from human fresh plasma and oxidized to form oxLDL.The hyperlipidemia model was established by oxLDL stimulation cells, inflammatory model was established by lipopolysaccharide (LPS) stimulation cells, and lipid accumulation of macrophages was observed by oil red O staining. 2. The Balb/c mouse peritoneal macrophage mRNAs were extracted, the full length of Api6cDNA was obtained by reverse transcription amplification, and the plasmid pCDNA3.1 / Api6.3 was constructed into the pCDNA3.1 plasmid. Real-time fluorescence quantitative PCR (real-time quantitative PCR) was used to detect the expression of mRNA in two kinds of macrophages. Result 1. It was found that 200 ng/ml LPS and 100 渭 g/ml oxLDL could induce abnormal lipid accumulation in two kinds of macrophages cultured in vitro. PCDNA3.1/Api6 plasmid was successfully constructed and transient transfection of RAW264.7 macrophages was carried out. The expression of Api6 was up-regulated by 12500 times. Under hyperlipidemia, the expression of scavenger receptor SRA in RAW264.7 cells and THP-1 cells was increased by 6 times, 2.5 times and 6 times, respectively. However, the expression of Api6 in RAW264.7 cells was not significantly up-regulated under the same treatment condition, but the expression of Api6 in THP-1 cells was increased by 2.7 times when inflammation and hyperlipidemia were present at the same time. LXR receptor agonist T0901317 could up-regulate the expression of ABCA1 and ABCG1 genes of LXR target genes in RAW264.7 cells by 22 times and 7 times respectively. The expression of ABCA1 and ABCG1 genes in THP-1 macrophages were all up-regulated by 9 times. However, LXR receptor agonist T0901317 did not change the expression of Api6 in RAW264.7 cells. However, the expression of Api6 in THP-1 cells increased by 2 times. The change trend of Api6 expression level was related to the expression of LXR 偽 under various conditions. Conclusion 200 ng/ml LPS and 100 渭 g/ml oxLDL could induce abnormal lipid accumulation in cultured RAW264.7 and THP-1 cells. The expression level of Api6 was significantly related to the expression of nuclear receptor LXR receptor 偽 subtype under the condition of inflammation and hyperlipidemia. Due to the lack of LXR 偽 receptor, the basic expression of Api6 in murine macrophage cell line RAW264.7 in vitro was low, so it could be used as carrier cell. To establish a cell model of overexpression of Api6 to study the role of Api6 in lipid metabolism.
【學位授予單位】:重慶醫(yī)科大學
【學位級別】:碩士
【學位授予年份】:2010
【分類號】:R364.2
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