Deleterious effects of neuronal accumulation of glycogen in flies and mice.

Deleterious effects of neuronal accumulation of glycogen in flies and mice.
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DOI:
10.1002/emmm.201200241
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发表时间:
2012-08
影响因子:
11.1
通讯作者:
Guinovart, Joan J.
Guinovart, Joan J.
中科院分区:
医学1区
文献类型:
--
作者:
Duran, Jordi;Florencia Tevy, Maria;Garcia-Rocha, Mar;Calbo, Joaquim;Milan, Marco;Guinovart, Joan J.

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在生理条件下,大多数神经元使糖原合成酶(GS)处于非活性状态,并且不显示可检测的糖原水平。然而,神经元中异常的糖原积累是患有拉福拉病或其他聚葡萄糖疾病的患者的标志。尽管这些疾病与参与糖原代谢的基因突变有关,但糖原积累的作用仍然难以捉摸。在这里,我们生成了表达 GS 活性形式的小鼠和果蝇模型,以迫使神经元积累糖原。我们提供的证据表明,小鼠和果蝇神经元中糖原的逐渐积累会导致神经元损失、运动缺陷和寿命缩短。我们的结果强调神经元中糖原的积累是神经变性的直接原因。
Under physiological conditions, most neurons keep glycogen synthase (GS) in an inactive form and do not show detectable levels of glycogen. Nevertheless, aberrant glycogen accumulation in neurons is a hallmark of patients suffering from Lafora disease or other polyglucosan disorders. Although these diseases are associated with mutations in genes involved in glycogen metabolism, the role of glycogen accumulation remains elusive. Here, we generated mouse and fly models expressing an active form of GS to force neuronal accumulation of glycogen. We present evidence that the progressive accumulation of glycogen in mouse and Drosophila neurons leads to neuronal loss, locomotion defects and reduced lifespan. Our results highlight glycogen accumulation in neurons as a direct cause of neurodegeneration.
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影响因子: 3.5
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