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- W4366979298 abstract "Lipolysis of stored triglycerides is stimulated via β-adrenergic receptor (β-AR)/3′,5′-cyclic adenosine monophosphate (cAMP) signaling and inhibited via phosphodiesterases (PDEs). In type 2 diabetes, a dysregulation in the storage/lipolysis of triglycerides leads to lipotoxicity. Here, we hypothesize that white adipocytes regulate their lipolytic responses via the formation of subcellular cAMP microdomains. To test this, we investigate real-time cAMP/PDE dynamics at the single-cell level in human white adipocytes with a highly sensitive florescent biosensor and uncover the presence of several receptor-associated cAMP microdomains where cAMP signals are compartmentalized to differentially regulate lipolysis. In insulin resistance, we also detect cAMP microdomain dysregulation mechanisms that promote lipotoxicity, but regulation can be restored by the anti-diabetic drug metformin. Therefore, we present a powerful live-cell imaging technique capable of resolving disease-driven alterations in cAMP/PDE signaling at the subcellular level and provide evidence to support the therapeutic potential of targeting these microdomains." @default.
- W4366979298 created "2023-04-27" @default.
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- W4366979298 date "2023-05-01" @default.
- W4366979298 modified "2023-09-25" @default.
- W4366979298 title "Live-cell imaging identifies cAMP microdomains regulating β-adrenoceptor-subtype-specific lipolytic responses in human white adipocytes" @default.
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- W4366979298 doi "https://doi.org/10.1016/j.celrep.2023.112433" @default.
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