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. 2023 May 17;14:1148209. doi: 10.3389/fimmu.2023.1148209

Figure 10.

Figure 10

Obesity and consumption of foods high in advanced glycation end-products (red circles, AGEs) create a pro-inflammatory state through dysregulated arginine metabolism (increasing arginase activity and production of ADMA, in red) and activating RAGE-mediated, NF-kB inflammation (pink star). ADMA also inhibits endothelial NOS (eNOS) and increases NF-kB activity. GLP-1 production is spurred by consumption of L-arginine (green circles) and when it binds its receptor, it activates protein kinase A (blue octagon). This activity blunts RAGE-mediated inflammation and production of ADMA (blue T-lines). The GLP-1 pathway is also a target of treatments for diabetes and obesity. GLP-1 is rapidly degraded by DPP-4, and DPP-4 inhibitors (gliptins) are used to increase GLP-1. GLP-1 receptor agonists (exenatide and liraglutide) are also available (148). Figure modified from article 147 Open access (Journal of Immunology Research) permissible to re-use under a CC-BY 4.0 license).