A study published in *Nature Medicine* (2005) reveals that obesity and high-fat diets (HFD) induce chronic, subacute inflammation in the liver through the activation of NF-κB and downstream cytokine production, leading to both local and systemic insulin resistance. Using transgenic mice, researchers selectively activated NF-κB in hepatocytes by expressing constitutively active IKK-β, resulting in a type 2 diabetes phenotype characterized by hyperglycemia, profound hepatic insulin resistance, and moderate systemic insulin resistance. The liver of these mice showed increased production of proinflammatory cytokines such as IL-6, IL-1β, and TNF-α, similar to that observed in HFD-fed mice. Insulin resistance was improved by neutralizing IL-6 or inhibiting IKK-β with salicylates. Hepatic expression of the IκBα superrepressor (LISR) reversed the insulin resistance phenotype in both LIKK and wild-type mice. These findings suggest that lipid accumulation in the liver leads to subacute hepatic inflammation, which causes insulin resistance both locally and systemically. The study also shows that liver-specific inhibition of NF-κB reduces insulin resistance and inflammation, indicating a critical role for the liver in the development of insulin resistance associated with obesity and metabolic syndrome. The results highlight the importance of NF-κB and IL-6 in the pathogenesis of insulin resistance and suggest that targeting these pathways could be a potential therapeutic strategy for metabolic disorders.A study published in *Nature Medicine* (2005) reveals that obesity and high-fat diets (HFD) induce chronic, subacute inflammation in the liver through the activation of NF-κB and downstream cytokine production, leading to both local and systemic insulin resistance. Using transgenic mice, researchers selectively activated NF-κB in hepatocytes by expressing constitutively active IKK-β, resulting in a type 2 diabetes phenotype characterized by hyperglycemia, profound hepatic insulin resistance, and moderate systemic insulin resistance. The liver of these mice showed increased production of proinflammatory cytokines such as IL-6, IL-1β, and TNF-α, similar to that observed in HFD-fed mice. Insulin resistance was improved by neutralizing IL-6 or inhibiting IKK-β with salicylates. Hepatic expression of the IκBα superrepressor (LISR) reversed the insulin resistance phenotype in both LIKK and wild-type mice. These findings suggest that lipid accumulation in the liver leads to subacute hepatic inflammation, which causes insulin resistance both locally and systemically. The study also shows that liver-specific inhibition of NF-κB reduces insulin resistance and inflammation, indicating a critical role for the liver in the development of insulin resistance associated with obesity and metabolic syndrome. The results highlight the importance of NF-κB and IL-6 in the pathogenesis of insulin resistance and suggest that targeting these pathways could be a potential therapeutic strategy for metabolic disorders.