Adipocyte-specific deletion of PIP5K1c reduces diet-induced obesity and insulin resistance by increasing energy expenditure

Lipids in Health and Disease

Sheng Guo¹  Ying Huang²  Puxin Chen²  Liping Deng²  Miaoling Huang²  Cuishan Yang³  Xiaohong Huang³  Guan Huang⁴  Feng Chen⁵ 

[1] Department of Medical Administration, Shenzhen Clinical Medical College, Guangzhou University of Chinese Medicine, Longgang District Central Hospital of Shenzhen, 518116, Shenzhen, Guangdong, China;Department of Metabolism and Endocrinology, Shenzhen Clinical Medical College, Guangzhou University of Chinese Medicine, Longgang District Central Hospital of Shenzhen, 518116, Shenzhen, Guangdong, China;Department of Nursing, Shenzhen Clinical Medical College, Guangzhou University of Chinese Medicine, Longgang District Central Hospital of Shenzhen, 518116, Shenzhen, Guangdong, China;Department of Pathology, Shenzhen Clinical Medical College, Guangzhou University of Chinese Medicine, Longgang District Central Hospital of Shenzhen, 518116, Shenzhen, Guangdong, China;Department of Plastic Surgy, Shenzhen Clinical Medical College, Guangzhou University of Chinese Medicine; Longgang District Central Hospital of Shenzhen, 518116, Shenzhen, Guangdong, China;

关键词: Obesity;    PIP5K1c;    Adipose tissue;    Energy expenditure;    Adipogenesis;   

DOI  :  10.1186/s12944-021-01616-4

来源: Springer

【 摘 要 】

BackgroundPhosphatidylinositol 4-phosphate 5-kinase type I c (PIP5K1c) catalyses the synthesis of phospholipid phosphatidylinositol 4,5-bisphosphate (PIP2) by phosphorylating phosphatidylinositol 4 phosphate, which plays multiple roles in regulating focal adhesion formation, invasion, and cell migration signal transduction cascades. Here, a new physiological mechanism of PIP5K1c in adipocytes and systemic metabolism is reported.MethodsAdipose-specific conditional knockout mice were generated to delete the PIP5K1c gene in adipocytes. In addition, in vitro research investigated the effect of PIP5K1c deletion on adipogenesis.ResultsDeletion of PIP5K1c in adipocytes significantly alleviated high fat diet (HFD)-induced obesity, hyperlipidaemia, hepatic steatosis, and insulin resistance. PIP5K1c deficiency in adipocytes also decreased adipocyte volume in HFD-induced obese mice, whereas no significant differences were observed in body weight and adipose tissue weight under normal chow diet conditions. PIP5K1c knockout in adipocytes significantly enhanced energy expenditure, which protected mice from HFD-induced weight gain. In addition, adipogenesis was markedly impaired in mouse stromal vascular fraction (SVF) from PIP5K1c-deleted mice.ConclusionUnder HFD conditions, PIP5K1c regulates adipogenesis and adipose tissue homeostasis. Together, these data indicate that PIP5K1c could be a novel potential target for regulating fat accumulation, which could provide novel insight into the treatment of obesity.

【 授权许可】

CC BY