Reduced gluconeogenesis and lactate clearance in Huntington's disease

被引:33
作者
Josefsen, Knud [1 ]
Nielsen, Signe M. B. [2 ]
Campos, Andre
Seifert, Thomas [4 ]
Hasholt, Lis [2 ]
Nielsen, Jorgen E. [2 ,3 ]
Norremolle, Anne [2 ]
Skotte, Niels H. [2 ]
Secher, Niels H. [4 ]
Quistorff, Bjorn [5 ]
机构
[1] Rigshosp, Bartholin Inst, Copenhagen Bioctr, DK-2200 Copenhagen N, Denmark
[2] Univ Copenhagen, Dept Cellular & Mol Med, Neurogenet Sect, Copenhagen, Denmark
[3] Rigshosp, Memory Disorders Res Grp, Neurogenet Clin, DK-2200 Copenhagen N, Denmark
[4] Rigshosp, Dept Anaesthesia, Copenhagen Muscle Res Ctr, DK-2200 Copenhagen N, Denmark
[5] Univ Copenhagen, Dept Biomed Sci, Nucl Magnet Resonance Ctr, Copenhagen, Denmark
关键词
Glucose; Exercise; Liver perfusion; Gluconeogenesis; Brain metabolism; TRANSGENIC MOUSE MODEL; PITUITARY-ADRENAL AXIS; EXPANDED CAG REPEAT; HEPATIC GLUCONEOGENESIS; ENERGY-METABOLISM; MAXIMAL EXERCISE; GENE; MUSCLE; BRAIN; DYSREGULATION;
D O I
10.1016/j.nbd.2010.08.009
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
We studied systemic and brain glucose and lactate metabolism in Huntington's disease (HD) patients in response to ergometer cycling. Following termination of exercise, blood glucose increased abruptly in control subjects, but no peak was seen in any of the HD patients (2.0 +/- 0.5 vs. 0.0 +/- 0.2 mM, P<2 x 10(-6)). No difference was seen in brain metabolism parameters. Reduced hepatic glucose output in the HD mouse model R6/2 following a lactate challenge, combined with reduced phosphoenolpyruvate carboxykinase and increased pyruvate kinase activity in the mouse liver suggest a reduced capacity for gluconeogenesis in HD, possibly contributing to the clinical symptoms of HD. We propose that blood glucose concentration in the recovery from exercise can be applied as a liver function test in HD patients. (C) 2010 Elsevier Inc. All rights reserved.
引用
收藏
页码:656 / 662
页数:7
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