Increased fat mass and insulin resistance in mice lacking pancreatic lipase-related protein 1 |
| |
Authors: | Ren Jianke Chen Zheng Zhang Wen Li Limei Sun Ruilin Deng Chunguang Fei Zhaoliang Sheng Zejing Wang Long Sun Xia Wang Zhugang Fei Jian |
| |
Institution: | a Shanghai Research Center for Model Organisms, Pu Dong, Shanghai, Chinab School of Life Science and Technology, Tongji University, Shanghai, Chinac Laboratory of Molecular Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, Chinad Graduate School of Chinese Academy of Sciences, Beijing, China |
| |
Abstract: | Pancreatic triglyceride lipase (PTL) and its cofactor, colipase, are required for efficient dietary triglyceride digestion. In addition to PTL, pancreatic acinar cells synthesize two pancreatic lipase-related proteins (PLRP1 and PLRP2), which have a high degree of sequence and structural homology with PTL. The lipase activity of PLRP2 has been confirmed, whereas no known triglyceride lipase activity has been detected with PLRP1 up to now. To explore the biological functions of PLRP1 in vivo, we generated Plrp1 knockout (KO) mice in our laboratory. Here we show that the Plrp1 KO mice displayed mature-onset obesity with increased fat mass, impaired glucose clearance and the resultant insulin resistance. When fed on high-fat (HF) diet, the Plrp1 KO mice exhibited an increased weight gain, fat mass and severe insulin resistance compared with wild-type mice. Pancreatic juice extracted from Plrp1 KO mice had greater ability to hydrolyze triglyceride than that from the wild-type littermates. We propose that PLRP1 may function as a metabolic inhibitor in vivo of PLT-colipase-mediated dietary triglyceride digestion and provides potential anti-obesity targets for developing new drugs. |
| |
Keywords: | Fat mass Insulin resistance Obesity Pancreatic lipase-related protein 1 Knockout |
本文献已被 ScienceDirect PubMed 等数据库收录! |
|