[HTML][HTML] The circulating metabolome of human starvation

ML Steinhauser, BA Olenchock, J O'Keefe, M Lun… - JCI insight, 2018 - ncbi.nlm.nih.gov
ML Steinhauser, BA Olenchock, J O'Keefe, M Lun, KA Pierce, H Lee, L Pantano, A Klibanski…
JCI insight, 2018ncbi.nlm.nih.gov
The human adaptive starvation response allows for survival during long-term caloric
deprivation. Whether the physiology of starvation is adaptive or maladaptive is context
dependent: activation of pathways by caloric restriction may promote longevity, yet in the
context of caloric excess, the same pathways may contribute to obesity. Here, we performed
plasma metabolite profiling of longitudinally collected samples during a 10-day, 0-calorie
fast in humans. We identify classical milestones in adaptive starvation, including the early …
Abstract
The human adaptive starvation response allows for survival during long-term caloric deprivation. Whether the physiology of starvation is adaptive or maladaptive is context dependent: activation of pathways by caloric restriction may promote longevity, yet in the context of caloric excess, the same pathways may contribute to obesity. Here, we performed plasma metabolite profiling of longitudinally collected samples during a 10-day, 0-calorie fast in humans. We identify classical milestones in adaptive starvation, including the early consumption of gluconeogenic amino acids and the subsequent surge in plasma nonesterified fatty acids that marks the shift from carbohydrate to lipid metabolism, and demonstrate findings, including (a) the preferential release of unsaturated fatty acids and an associated shift in plasma lipid species with high degrees of unsaturation and (b) evidence that acute, starvation-mediated hypoleptinemia may be a driver of the transition from glucose to lipid metabolism in humans.
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