Fig. 2. Proposed model of how PKCβ activation causes adipose dysfunction by initiating a mitochondrial axis involving p66shc, leading to adipocyte hypertrophy, oxidative stress, and
inflammation. PKCβ activation by HFD-induced or genetic obesity initiates a signaling cascade causing mitochondrial dysfunction, which results in downregulation of autophagy and
contributes to obesity and insulin resistance. Dysfunctional mitochondria may create a vicious cycle of PKCβ activation, further jeopardizing mitochondrial function. Mitochondrial
dysfunction can activate PKCβ in two ways: (i) by interfering with oxidation of fatty acyl-CoA and consequently causing accumulation of intracellular lipid and diacylglycerol,
and (ii) by generation of reactive oxygen species that activate PKCβ. Such mechanisms are capable of causing or maintaining PKCβ activation and adipose tissue dysfunction
in obesity, potentially linking obesity to associated disorders.
Fig. 2. Proposed model of how PKCβ activation causes adipose dysfunction by initiating a mitochondrial axis involving p66shc, leading to adipocyte hypertrophy, oxidative stress, andinflammation. PKCβ activation by HFD-induced or genetic obesity initiates a signaling cascade causing mitochondrial dysfunction, which results in downregulation of autophagy andcontributes to obesity and insulin resistance. Dysfunctional mitochondria may create a vicious cycle of PKCβ activation, further jeopardizing mitochondrial function. Mitochondrialdysfunction can activate PKCβ in two ways: (i) by interfering with oxidation of fatty acyl-CoA and consequently causing accumulation of intracellular lipid and diacylglycerol,and (ii) by generation of reactive oxygen species that activate PKCβ. Such mechanisms are capable of causing or maintaining PKCβ activation and adipose tissue dysfunctionin obesity, potentially linking obesity to associated disorders.
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