cJun NH2-terminal kinase 1 (JNK1): roles in metabolic regulation of insulin resistance.
Study Goal
The researchers aimed to investigate the role of JNK1 in high-fat diet-induced obesity and insulin resistance in mice.
Results Summary
The study found that a high-fat diet activated the JNK1 pathway, leading to insulin resistance and obesity in mice, while JNK1 ablation prevented these effects. JNK1's role in insulin resistance was separable from its effects on obesity, suggesting it as a potential drug target for metabolic disorders.
Population
Mice (germ-line Jnk1-ablated and wild-type)
Effective Dosage
Not specified
Duration
Not specified
Interactions
None mentioned
| Intervention | Direction | Endpoint | Population | Dosage | Impact | Claim # |
|---|---|---|---|---|---|---|
Feeding a high-fat diet | increase | the JNK1 signaling pathway | mice | - | causes activation | #1 |
Feeding a high-fat diet | increase | insulin resistance | mice | - | causes | #2 |
Feeding a high-fat diet | increase | obesity | mice | - | causes | #3 |
Germ-line ablation of Jnk1 | decrease | diet-induced obesity | mice | - | prevents | #4 |
Germ-line ablation of Jnk1 | decrease | insulin resistance | mice | - | prevents | #5 |
JNK1 | neutral | insulin resistance | - | - | plays multiple roles in the regulation | #6 |
The cJun NH(2)-terminal kinase isoform JNK1 is implicated in the mechanism of obesity-induced insulin resistance. Feeding a high-fat diet causes activation of the JNK1 signaling pathway, insulin resistance, and obesity in mice. Germ-line ablation of Jnk1 prevents both diet-induced obesity and insulin resistance. Genetic analysis indicates that the effects of JNK1 on insulin resistance can be separated from effects of JNK1 on obesity. Emerging research indicates that JNK1 plays multiple roles in the regulation of insulin resistance, including altered gene expression, hormone/cytokine production, and lipid metabolism. Together, these studies establish JNK1 as a potential pharmacological target for the development of drugs that might be useful for the treatment of insulin resistance, metabolic syndrome, and type 2 diabetes.