INTRODUCTIONThe mechanism that DNA hypomethylation leads toactivation of oncogene and occurrence of malignantneoplasm is being increasingly recognized byresearchers. Normal DNA methylation playsimportant role in stabi...INTRODUCTIONThe mechanism that DNA hypomethylation leads toactivation of oncogene and occurrence of malignantneoplasm is being increasingly recognized byresearchers. Normal DNA methylation playsimportant role in stabilizing the phenotype of cell.DNA methylation status reduction and/or patternalteration are related to activation and abnormallyhigh expression of some oncogenes and cellularmalignancy[1-6]. c-fms oncogene encodes for colonystimulating factor 1 receptor (CSF-1R)[7], c-fms/CSF-1R was highly expressed in hepatocellularcarcinoma (HCC) tissue, but the mechanismremained obscure[8,9].展开更多
目的:观察丹参酮ⅡA对ApoE基因敲除小鼠主动脉粥样斑块形成及对腹腔巨噬细胞胆固醇逆向转运相关基因的影响。方法:20只Apo E-/-小鼠随机分成模型组、丹参酮ⅡA组,10只C57BL/6J小鼠作为空白对照组。模型组、丹参酮ⅡA组给予高脂饲料喂养...目的:观察丹参酮ⅡA对ApoE基因敲除小鼠主动脉粥样斑块形成及对腹腔巨噬细胞胆固醇逆向转运相关基因的影响。方法:20只Apo E-/-小鼠随机分成模型组、丹参酮ⅡA组,10只C57BL/6J小鼠作为空白对照组。模型组、丹参酮ⅡA组给予高脂饲料喂养,空白组给予普通饲料。丹参酮ⅡA组每日灌胃丹参酮ⅡA(30mg/kg),模型组、空白对照组灌胃予等量生理盐水。检测各组小鼠血清TG、TC、HDL-C、LDL-C水平。油红O染色法观察各组小鼠主动脉脂质沉积情况,HE染色观察小鼠主动脉结构变化及动脉粥样硬化程度,采用RT-PCR和Western blot法检测腹腔巨噬细胞ABCA1、ABCG1、CD36的m RNA和蛋白表达,流式细胞术检测巨噬细胞CD36含量。结果:模型组小鼠血清HDL-C水平显著低于空白对照组,血清TG、TC、LDL-C水平显著高于空白对照组;组织形态学显示,模型组小鼠主动脉管腔中明显可见粥样斑块形成,管壁沉积大量脂质,腹腔巨噬细胞ABCA1 m RNA和蛋白表达显著低于空白对照组,ABCG1表达变化不明显,CD36 m RNA和蛋白表达显著高于空白对照组。与模型组比较,丹参酮ⅡA组小鼠血脂水平及动脉损伤水平明显改善;丹参酮ⅡA组巨噬细胞ABCA1基因和蛋白表达显著高于模型组,CD36基因和蛋白表达显著低于模型组,两组ABCG1表达差异无统计学意义。结论:丹参酮ⅡA对Apo E-/-小鼠主动脉斑块形成具有良好的抑制的作用,其机制可能与调控ABCA1及CD36等与巨噬细胞胆固醇流出相关基因及血脂有关。展开更多
Objective： To investigate the molecular mechanisms and effective target ponits of lipid-lowering drug, Rhizoma Curcumae Longae, and study the effect of curcumin on the expression of low density lipoprotein （LDL） re...Objective： To investigate the molecular mechanisms and effective target ponits of lipid-lowering drug, Rhizoma Curcumae Longae, and study the effect of curcumin on the expression of low density lipoprotein （LDL） receptors in macrophages in mice. Methods. Macrophages in mice were treated with curcumin, which was purified from the ethanolly extraction of Rhizoma Curcumae Longae for 24 h. The LDL receptors expressed in the macrophages were determined by enzyme-linked immunosorbent assay （ELISA） and assay of Dil labeled LDL uptake by flow cytometer. Results： It was found for the first time that 10 μmol/L-50 μmol/L curcumin could obviously up-regulate the expression of LDL receptor in macrophages in mice, and a dose-effect relationship was demonstrated. Conclusion： One of the lipid-lowering mechanisms of traditional Chinese medicine, Rhizoma Curcumae Longae, was completed by the effect of curcumin through the up-regulation of the expression of LDL receptor.展开更多
基金Supported by the Natural Science Foundation of Guangdong Province, No 990422
文摘INTRODUCTIONThe mechanism that DNA hypomethylation leads toactivation of oncogene and occurrence of malignantneoplasm is being increasingly recognized byresearchers. Normal DNA methylation playsimportant role in stabilizing the phenotype of cell.DNA methylation status reduction and/or patternalteration are related to activation and abnormallyhigh expression of some oncogenes and cellularmalignancy[1-6]. c-fms oncogene encodes for colonystimulating factor 1 receptor (CSF-1R)[7], c-fms/CSF-1R was highly expressed in hepatocellularcarcinoma (HCC) tissue, but the mechanismremained obscure[8,9].
文摘目的:观察丹参酮ⅡA对ApoE基因敲除小鼠主动脉粥样斑块形成及对腹腔巨噬细胞胆固醇逆向转运相关基因的影响。方法:20只Apo E-/-小鼠随机分成模型组、丹参酮ⅡA组,10只C57BL/6J小鼠作为空白对照组。模型组、丹参酮ⅡA组给予高脂饲料喂养,空白组给予普通饲料。丹参酮ⅡA组每日灌胃丹参酮ⅡA(30mg/kg),模型组、空白对照组灌胃予等量生理盐水。检测各组小鼠血清TG、TC、HDL-C、LDL-C水平。油红O染色法观察各组小鼠主动脉脂质沉积情况,HE染色观察小鼠主动脉结构变化及动脉粥样硬化程度,采用RT-PCR和Western blot法检测腹腔巨噬细胞ABCA1、ABCG1、CD36的m RNA和蛋白表达,流式细胞术检测巨噬细胞CD36含量。结果:模型组小鼠血清HDL-C水平显著低于空白对照组,血清TG、TC、LDL-C水平显著高于空白对照组;组织形态学显示,模型组小鼠主动脉管腔中明显可见粥样斑块形成,管壁沉积大量脂质,腹腔巨噬细胞ABCA1 m RNA和蛋白表达显著低于空白对照组,ABCG1表达变化不明显,CD36 m RNA和蛋白表达显著高于空白对照组。与模型组比较,丹参酮ⅡA组小鼠血脂水平及动脉损伤水平明显改善;丹参酮ⅡA组巨噬细胞ABCA1基因和蛋白表达显著高于模型组,CD36基因和蛋白表达显著低于模型组,两组ABCG1表达差异无统计学意义。结论:丹参酮ⅡA对Apo E-/-小鼠主动脉斑块形成具有良好的抑制的作用,其机制可能与调控ABCA1及CD36等与巨噬细胞胆固醇流出相关基因及血脂有关。
文摘Objective： To investigate the molecular mechanisms and effective target ponits of lipid-lowering drug, Rhizoma Curcumae Longae, and study the effect of curcumin on the expression of low density lipoprotein （LDL） receptors in macrophages in mice. Methods. Macrophages in mice were treated with curcumin, which was purified from the ethanolly extraction of Rhizoma Curcumae Longae for 24 h. The LDL receptors expressed in the macrophages were determined by enzyme-linked immunosorbent assay （ELISA） and assay of Dil labeled LDL uptake by flow cytometer. Results： It was found for the first time that 10 μmol/L-50 μmol/L curcumin could obviously up-regulate the expression of LDL receptor in macrophages in mice, and a dose-effect relationship was demonstrated. Conclusion： One of the lipid-lowering mechanisms of traditional Chinese medicine, Rhizoma Curcumae Longae, was completed by the effect of curcumin through the up-regulation of the expression of LDL receptor.
