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Vanillin induces adipocyte differentiation in 3T3-L1 cells by activating extracellular signal regulated kinase 42/44.

机译:香兰素通过激活细胞外信号调节激酶42/44诱导3T3-L1细胞的脂肪细胞分化。

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AIMS: To investigate the effect of vanillin, a dietary component, on adipocyte differentiation and the mechanism involved in the process using 3T3-L1 murine preadipocytes. MAIN METHODS: The effect of vanillin on adipocyte differentiation was detected by Oil Red O analysis. The activation of extracellular signal regulated kinase 42/44 (ERK 42/44), Akt, expression of the key regulator of adipocyte differentiation peroxisome proliferators-activated receptor (PPARgamma) and its target gene glucose transporter 4 (GLUT4) were detected by western blotting. Glucose uptake assay was used to determine the insulin sensitivity of adipocytes differentiated by vanillin treatment. To confirm the role of ERK 42/44 and Akt, Oil Red O analysis was performed with cells differentiated in the presence or absence of ERK inhibitor U0126 or Akt kinase 1/2 inhibitor. KEY FINDINGS: Vanillin induced adipocyte differentiation in 3T3-L1 cells in a dose dependent manner and also increased the expression levels of PPARgamma and its target gene GLUT4. The adipocytes differentiated by vanillin exhibited insulin sensitivity as demonstrated by a significant increase in glucose uptake. Vanillin treatment activated the phosphorylation of ERK 42/44 during the initial phase of adipocyte differentiation but there was no significant change in the Akt phosphorylation status. SIGNIFICANCE: The data show that vanillin induces adipocyte differentiation in 3T3-L1 cells by activating ERK42/44 and these adipocytes are insulin sensitive in nature.
机译:目的:研究膳食成分香草醛对脂肪细胞分化的影响,以及使用3T3-L1鼠前脂肪细胞参与该过程的机制。主要方法:通过油红O分析检测香兰素对脂肪细胞分化的影响。通过western blotting检测细胞外信号调节激酶42/44(ERK 42/44)的活化,Akt,脂肪细胞分化过氧化物酶体增殖物激活受体(PPARgamma)及其靶基因葡萄糖转运蛋白4(GLUT4)关键调节剂的表达。 。葡萄糖摄取测定用于确定通过香草醛处理分化的脂肪细胞的胰岛素敏感性。为了确认ERK 42/44和Akt的作用,在有或没有ERK抑制剂U0126或Akt激酶1/2抑制剂的情况下对分化的细胞进行了油红O分析。主要发现:香兰素以剂量依赖性方式诱导3T3-L1细胞中的脂肪细胞分化,并且还增加了PPARgamma及其靶基因GLUT4的表达水平。香草醛分化的脂肪细胞表现出胰岛素敏感性,如葡萄糖摄取的显着增加所证明。香兰素处理在脂肪细胞分化的初始阶段激活了ERK 42/44的磷酸化,但Akt磷酸化状态没有明显变化。意义:数据表明,香兰素通过激活ERK42 / 44诱导3T3-L1细胞的脂肪细胞分化,并且这些脂肪细胞本质上对胰岛素敏感。

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