目的研究拟探讨瘦素(leptin)对长链脂酰辅酶A家族成员长链脂酰辅A合成酶5(acyl-CoA synthetase long chain family member 5,ACSL5)的调控作用及机制,并探究其对乳腺癌细胞迁移和侵袭的影响。方法免疫荧光实验检测瘦素受体的表达;划痕...目的研究拟探讨瘦素(leptin)对长链脂酰辅酶A家族成员长链脂酰辅A合成酶5(acyl-CoA synthetase long chain family member 5,ACSL5)的调控作用及机制,并探究其对乳腺癌细胞迁移和侵袭的影响。方法免疫荧光实验检测瘦素受体的表达;划痕愈合实验和Transwell实验检测细胞迁移、侵袭能力;采用PCR芯片数据分析瘦素下游靶基因,生物信息学方法分析ACSL5在乳腺癌中的表达、与患者分期及预后关系;RT-qPCR检测不同浓度瘦素处理后ACSL5的表达;慢病毒转染构建过表达ACSL5稳转株;Western blot检测上皮-间质转化(epithelial-mesenchymal transition,EMT)相关蛋白表达及AMPK-α、p-AMPK-α的表达。结果瘦素促进MCF-7细胞体外迁移和侵袭及EMT;ACSL5是瘦素下游靶基因,在乳腺癌中显著低表达且与患者预后相关;瘦素通过其受体OBR下调ACSL5的表达;瘦素激活AMPK通路下调ACSL5促进乳腺癌MCF-7细胞迁移和侵袭及EMT。结论瘦素可能通过激活AMPK通路下调ACSL5,增强乳腺癌细胞的迁移和侵袭能力并促进其EMT进程,从而促进乳腺癌恶性进展。展开更多
Obesity is a severely public health problem the whole society faces, and it is correlated closely with many diseases, such as diabetesⅡ, hypertension, coronary heart disease,gallstone, and so on. Therefore it threate...Obesity is a severely public health problem the whole society faces, and it is correlated closely with many diseases, such as diabetesⅡ, hypertension, coronary heart disease,gallstone, and so on. Therefore it threatens people’s survival quality severely. Obesity is a multiple-factor disease including genetic, metabolic and behavioral factor, and the gene is the main determining factor. With the development of molecular biology technique, people have founded several genes involved in obesity. Among these genes, the research on obese gene is the most profound. The protein leptin is the expression product of the obese gene. This review elucidates the structure, the main biological function, the mechanism of leptin and it’s relationship with obesity.展开更多
L eptin是 ob基因表达的脂肪组织源激素 ,其主要作用是减少体脂、控制体重和调节机体能量平衡。它的产生和代谢受到遗传和体内外环境因素的调控和影响。运动训练可减低 ob m RNA的表达和血 leptin浓度 ,训练所致的体脂量下降是产生这种...L eptin是 ob基因表达的脂肪组织源激素 ,其主要作用是减少体脂、控制体重和调节机体能量平衡。它的产生和代谢受到遗传和体内外环境因素的调控和影响。运动训练可减低 ob m RNA的表达和血 leptin浓度 ,训练所致的体脂量下降是产生这种作用的重要决定因素。单次运动对 lepin表达和其血中浓度的效应 ,有减低与无影响的研究结果。运动的这些效应可能依赖于运动负荷量和热能消耗量 ,也与一些激素和代谢物有关。展开更多
文摘目的研究拟探讨瘦素(leptin)对长链脂酰辅酶A家族成员长链脂酰辅A合成酶5(acyl-CoA synthetase long chain family member 5,ACSL5)的调控作用及机制,并探究其对乳腺癌细胞迁移和侵袭的影响。方法免疫荧光实验检测瘦素受体的表达;划痕愈合实验和Transwell实验检测细胞迁移、侵袭能力;采用PCR芯片数据分析瘦素下游靶基因,生物信息学方法分析ACSL5在乳腺癌中的表达、与患者分期及预后关系;RT-qPCR检测不同浓度瘦素处理后ACSL5的表达;慢病毒转染构建过表达ACSL5稳转株;Western blot检测上皮-间质转化(epithelial-mesenchymal transition,EMT)相关蛋白表达及AMPK-α、p-AMPK-α的表达。结果瘦素促进MCF-7细胞体外迁移和侵袭及EMT;ACSL5是瘦素下游靶基因,在乳腺癌中显著低表达且与患者预后相关;瘦素通过其受体OBR下调ACSL5的表达;瘦素激活AMPK通路下调ACSL5促进乳腺癌MCF-7细胞迁移和侵袭及EMT。结论瘦素可能通过激活AMPK通路下调ACSL5,增强乳腺癌细胞的迁移和侵袭能力并促进其EMT进程,从而促进乳腺癌恶性进展。
文摘Obesity is a severely public health problem the whole society faces, and it is correlated closely with many diseases, such as diabetesⅡ, hypertension, coronary heart disease,gallstone, and so on. Therefore it threatens people’s survival quality severely. Obesity is a multiple-factor disease including genetic, metabolic and behavioral factor, and the gene is the main determining factor. With the development of molecular biology technique, people have founded several genes involved in obesity. Among these genes, the research on obese gene is the most profound. The protein leptin is the expression product of the obese gene. This review elucidates the structure, the main biological function, the mechanism of leptin and it’s relationship with obesity.
