Track topics on Twitter Track topics that are important to you
Insulin resistance is a significant feature of type 2 diabetes mellitus and glucose and lipid metabolism disorders. Activation of NF-κB signaling pathway plays an important role in the formation of insulin resistance. FoxO1 plays a major role in regulating glucose and lipid metabolism, as well as insulin signaling pathway. Previous studies have shown that Progestin and AdipoQ Receptor 3 (PAQR3) suppresses the activity of PI3K/Akt, which is an upstream pathway of FoxO1, and additionally promotes the pathological process of diabetic renal inflammatory fibrosis via activating NF-κB pathway. On this basis, it has caused us great concern whether NF-κB is involved in PAQR3 regulation of FoxO1 under insulin resistance. In this study, we aimed to investigate whether PAQR3 regulates phosphorylation of FoxO1 via NF-κB pathway in palmitic acid (PA)-induced insulin-resistant HepG2 cells, thereby causing glucose and lipid metabolism disorders. We found that PA stimulation and PAQR3 overexpression decreased the phosphorylation of FoxO1 and the expressions of glucokinase (GCK) and low density lipoprotein receptor (LDLR), in addition, promoted the nuclear accumulation of NF-κB. Inhibition of NF-κB pathway increased the phosphorylation of FoxO1 and the expressions of GCK and LDLR which were downregulated by PA stimulation and PAQR3 overexpression. Taken together, in PA-induced insulin-resistant HepG2 cells, PAQR3 might regulate the phosphorylation of FoxO1 and the expressions of GCK and LDLR through NF-κB pathway, thereby regulating the glucose and lipid metabolism disorders induced by insulin resistance.
This article was published in the following journal.
Name: Experimental cell research
The transcription factor forkhead boxO1 (FoxO1) is a key mediator in the insulin signaling pathway and controls multiple physiological functions, including hepatic glucose production (HGP) and pancrea...
Endoplasmic reticulum (ER)-to-Golgi anterograde transport is driven by COPII vesicles mainly composed of a Sec23/Sec24 inner shell and a Sec13/Sec31 outer cage. How COPII vesicles are tethered to the ...
The therapeutic use of silk-derived materials such as fibroin in biomedicine is well-established in Southeast Asian countries. Studies indicated that silk fibroin (SF) peptide enhances insulin sensiti...
Hyperglycemia plays a major role in the development of diabetic macrovascular complications, including atherosclerosis and restenosis, which are responsible for the most of disability and mortality in...
Obesity has become an explicit public health concern because of its relevance to metabolic syndrome. Evidence points to the significance of beige adipocytes in regulating energy expenditure. Here, usi...
Fetuin-A has been identified as a novel physiological regulator of insulin action in vitro, in intact cells and in vivo in animals. Previous research has shown that circulating levels of f...
We are proposing a clinical investigation of the pathogenesis of insulin resistance (IR) in skeletal muscle and adipose tissue (AT), focusing specifically on the contributions of glucose d...
The molecular nature of insulin resistance in human muscle is still incompletely defined. Our data indicate that acetylation of mitochondrial proteins in humans is regulated by muscle cont...
A Basic-clinical Translational Research in Hepatitis B Virus (HBV)-Specific Antigen Peptides and HepG2 Cell Lysate Co-activated Dendritic Cells Combined With Transarterial Chemoembolization (TACE) in HBV-related HCC Treatment (BTRHBVAPHCLCDCCTCHBVHCCT)
The effect of anti-tumor treatment is not satisfying in HBV-related hepatocellular carcinoma (HBV-HCC) for reasons that HBV-HCC carries highly heterogeneous antigens to facilitate cancer c...
We are trying to understand how insulin (a type of hormone in the body that regulates how the body regulates how one metabolizes protein and carbohydrates) and exercise alter proteins invo...
A forkhead box transcription factor that is a major target of INSULIN signaling and regulator of metabolic homeostasis in response to OXIDATIVE STRESS. It binds to the insulin RESPONSE ELEMENT (IRE) and the related Daf-16 family binding element (DBE). Its activity is suppressed by insulin and it also regulates OSTEOBLAST proliferation, controls bone mass, and skeletal regulation of GLUCOSE metabolism. It promotes GLUCONEOGENESIS in HEPATOCYTES and regulates gene expression in ADIPOSE TISSUE. It is also an important CELL DEATH regulator. Chromosomal aberrations involving the FOXO1 gene occur in RHABDOMYOSARCOMA.
A type of pancreatic cell representing about 50-80% of the islet cells. Beta cells secrete INSULIN.
A structurally-related group of signaling proteins that are phosphorylated by the INSULIN RECEPTOR PROTEIN-TYROSINE KINASE. The proteins share in common an N-terminal PHOSPHOLIPID-binding domain, a phosphotyrosine-binding domain that interacts with the phosphorylated INSULIN RECEPTOR, and a C-terminal TYROSINE-rich domain. Upon tyrosine phosphorylation insulin receptor substrate proteins interact with specific SH2 DOMAIN-containing proteins that are involved in insulin receptor signaling.
A syndrome with excessively high INSULIN levels in the BLOOD. It may cause HYPOGLYCEMIA. Etiology of hyperinsulinism varies, including hypersecretion of a beta cell tumor (INSULINOMA); autoantibodies against insulin (INSULIN ANTIBODIES); defective insulin receptor (INSULIN RESISTANCE); or overuse of exogenous insulin or HYPOGLYCEMIC AGENTS.
Diminished effectiveness of INSULIN in lowering blood sugar levels: requiring the use of 200 units or more of insulin per day to prevent HYPERGLYCEMIA or KETOSIS. It can be caused by the presence of INSULIN ANTIBODIES or the abnormalities in insulin receptors (RECEPTOR, INSULIN) on target cell surfaces. It is often associated with OBESITY; DIABETIC KETOACIDOSIS; INFECTION; and certain rare conditions. (from Stedman, 25th ed)
Endocrine disorders are grouped into two categories: hormone imbalance - when a gland produces too much or too little of an endocrine hormone development of lesions (such as nodules or tumors) in the endocrine system, which may or may not affect...