PCAF通过调控FOXO1活性参与3T3-L1前脂肪细胞分化

Journal of Tianjin Medical University(2015)

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Abstract
目的:在3T3-L1细胞模型中,探讨组蛋白乙酰转移酶PCAF对脂肪细胞分化调控的分子机制。方法:应用Real-time PCR和Western blot检测PCAF在3T3-L1细胞分化过程中的表达;应用重组慢病毒感染细胞,shRNA干扰或过表达PCAF,通过Oil-Red-O染色法观察PCAF表达量变化对细胞分化的影响;应用ChIP on chip和PCR array的方法筛选PCAF调控的下游基因和通路;应用Western blot和ChIP qPCR对潜在目的基因进行验证。结果:PCAF在3T3-L1细胞分化过程中表达升高;PCAF表达下调会抑制脂肪细胞的分化;PCAF可以在细胞分化不同时间点诱导PDPK1和FOXO1的表达,并间接影响了FOXO1磷酸化。结论:组蛋白乙酰转移酶PCAF通过胰岛素通路(PI3K/PDPK1/AKT/FOXO1)参与对脂肪细胞分化的转录调控。
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Key words
P300/CBP associated factor,3T3-L1 cell line,FOXO1,transcriptional control
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