The Energetic Cost of Adrenergic Signaling in Primary Human Fibroblasts
This study quantifies the temporal dynamics and metabolic flexibility of adrenergic signaling in primary human fibroblasts, revealing that norepinephrine initially triggers a rapid glycolytic surge followed by a sustained increase in oxidative phosphorylation to drive cellular energy expenditure, a process that is significantly impaired in cells with mitochondrial defects.