Hepatic Phosphoserine Aminotransferase 1 Regulates Insulin Sensitivity in Mice via Tribbles Homolog 3
文献类型：期刊论文
| 作者 | Yu, Junjie; Xiao, Fei; Guo, Yajie; Deng, Jiali; Liu, Bin; Zhang, Qian; Li, Kai; Wang, Chunxia; Chen, Shanghai（陈上海）; Guo, Feifan（郭非凡）
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| 刊名 | DIABETES
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| 出版日期 | 2015 |
| 卷号 | 64期号:5页码:1591-1602 |
| 通讯作者 | Guo, FF (reprint author), Chinese Acad Sci, Grad Sch, Shanghai Inst Biol Sci, Key Lab Nutr & Metab,Inst Nutr Sci, Shanghai, Peoples R China. |
| 英文摘要 | Phosphoserine aminotransferase 1 (PSAT1) is an enzyme participating in serine synthesis. A role of PSAT1 in the regulation of insulin sensitivity, however, is unknown. In this study, we showed that hepatic PSAT1 expression and liver serine levels are reduced in genetically engineered leptin receptor-deficient (db/db) mice and high-fat diet (HFD)-induced diabetic mice. Additionally, overexpression of PSAT1 by adenovirus expressing PSAT1 improved insulin signaling and insulin sensitivity in vitro and in vivo under normal conditions. Opposite effects were observed when PSAT1 was knocked down by adenovirus expressing small hairpin RNA specific for PSAT1 (Ad-shPSAT1). Importantly, overexpression of PSAT1 also significantly ameliorated insulin resistance in diabetic mice. In addition, PSAT1 inhibited the expression of hepatic tribbles homolog 3 (TRB3) in vitro and in vivo, and adenoviruses expressing small hairpin RNA against TRB3-mediated inhibition of TRB3 reversed the attenuated insulin sensitivity in Ad-shPSAT1 mice. Interestingly, we found that serine mediates PSAT1 regulation of TRB3 expression and insulin signaling in vitro. These results identify a novel function for hepatic PSAT1 in regulating insulin sensitivity and provide important insights in targeting PSAT1 for treating insulin resistance and type 2 diabetes. Our results also suggest that nonessential amino acid serine may play an important role in regulating insulin sensitivity. |
| 类目[WOS] | Endocrinology & Metabolism |
| 研究领域[WOS] | Endocrinology & Metabolism |
| 关键词[WOS] | SERINE BIOSYNTHESIS ; AMINO-ACID ; LIPID-METABOLISM ; ER STRESS ; RESISTANCE ; GLUCOSE ; PATHWAY ; LIVER ; GLYCOGEN ; KINASE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000353431200015 |
| 公开日期 | 2016-02-26 |
| 版本 | 出版稿 |
| 源URL | [http://202.127.25.144/handle/331004/419]  |
| 专题 | 中国科学院上海生命科学研究院营养科学研究所_代谢的遗传与营养调控研究组 |
| 推荐引用方式 GB/T 7714 | Yu, Junjie,Xiao, Fei,Guo, Yajie,et al. Hepatic Phosphoserine Aminotransferase 1 Regulates Insulin Sensitivity in Mice via Tribbles Homolog 3[J]. DIABETES,2015,64(5):1591-1602. |
| APA | Yu, Junjie.,Xiao, Fei.,Guo, Yajie.,Deng, Jiali.,Liu, Bin.,...&Guo, Feifan.(2015).Hepatic Phosphoserine Aminotransferase 1 Regulates Insulin Sensitivity in Mice via Tribbles Homolog 3.DIABETES,64(5),1591-1602. |
| MLA | Yu, Junjie,et al."Hepatic Phosphoserine Aminotransferase 1 Regulates Insulin Sensitivity in Mice via Tribbles Homolog 3".DIABETES 64.5(2015):1591-1602. |
入库方式： OAI收割
来源：上海营养与健康研究所
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