Brain energy logistics refers to the comprehensive physiological processes governing the generation, distribution, and utilization of energy substrates within the central nervous system. This includes the transport of glucose and ketone bodies across the blood-brain barrier, their subsequent metabolism in neurons and glia, and the efficiency of mitochondrial oxidative phosphorylation. Optimal logistics are essential for sustained cognitive function and preventing neurodegeneration.
Origin
This term synthesizes concepts from neurophysiology, metabolic endocrinology, and transport biology, emphasizing the operational efficiency required by the brain, which consumes a disproportionately high percentage of the body’s total energy. The ‘logistics’ component highlights the systemic requirement for coordinated delivery and waste clearance to maintain the high energy flux of neural tissue.
Mechanism
The system relies heavily on astrocytic-neuronal metabolic coupling, where astrocytes manage glucose uptake and convert it to lactate, which then fuels the neurons. Hormones such as insulin and thyroid hormone are crucial regulators, influencing the expression and activity of glucose transporters and mitochondrial enzymes. Dysfunction in this logistics network, often seen with insulin resistance, leads directly to hypometabolism and cognitive impairment.
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