Increased White Matter Aerobic Glycolysis in Multiple Sclerosis

作者：Matthew R. Brier, Bradley Judge, Chunwei Ying, Amber Salter, Hongyu An, Aakash Patel, Qing Wang, Yong Wang, Anne H. Cross, Robert T. Naismith, Tammie L.S. Benzinger, Manu S. Goyal · 发表于：Annals of Neurology · 年份：2024 · DOI：10.1002/ana.27165 · 被引用次数：8 · 研究领域：Multiple Sclerosis Research Studies、Amyotrophic Lateral Sclerosis Research、Neurogenesis and neuroplasticity mechanisms

OBJECTIVE: Despite treatments which reduce relapses in multiple sclerosis (MS), many patients continue to experience progressive disability accumulation. MS is associated with metabolic disruptions and cerebral metabolic stress predisposes to tissue injury and possibly impaired remyelination. Additionally, myelin homeostasis is metabolically expensive and reliant on glycolysis. We investigated cerebral metabolic changes in MS and when in the disease course they occurred, and assessed their relationship with microstructural changes. METHODS: This study used combined fluorodeoxyglucose (FDG) positron emission tomography (PET) and magnetic resonance imaging (MRI) to measure cerebral metabolic rate of glucose and oxygen, thereby quantifying glycolysis. Twelve healthy controls, 20 patients with relapsing MS, and 13 patients with non-relapsing MS were studied. Relapsing patients with MS were treatment naïve and scanned pre- and post-initiation of high efficacy disease modifying therapy. RESULTS: In normal appearing white matter, we observed increased glucose utilization and reduced oxygen utilization in newly diagnosed MS, consistent with increased glycolysis. Increased glycolysis was greater in patients with a longer disease duration course and higher disability. Among newly diagnosed patients, different treatments had differential impacts on glucose utilization. Last, whereas hypermetabolism within lesions was clearly associated with inflammation, no such relationship was found w...