Effective treatment of mitochondrial myopathy by nicotinamide riboside, a vitamin B3.

Effective treatment of mitochondrial myopathy by nicotinamide riboside, a vitamin B3.
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DOI:
10.1002/emmm.201403943
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发表时间:
2014-06
影响因子:
11.1
通讯作者:
Suomalainen, Anu
Suomalainen, Anu
中科院分区:
医学1区
文献类型:
--
作者:
Khan, Nahid A.;Auranen, Mari;Paetau, Ilse;Pirinen, Eija;Euro, Liliya;Forsstrom, Saara;Pasila, Lotta;Velagapudi, Vidya;Carroll, Christopher J.;Auwerx, Johan;Suomalainen, Anu

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营养供应是生命和繁殖的主要调节因素,一个复杂的细胞信号网络已经进化到使生物体适应禁食。这些传感器通路监测细胞能量代谢,特别是线粒体ATP生成和NAD+/NADH比值,作为营养状态的主要信号。我们假设这些信号会被线粒体呼吸链疾病所改变,因为NADH的利用和ATP的产生效率低下。口服烟酰胺核苷(NR),一种维生素B3和NAD+前体,先前被证明可以提高小鼠NAD+水平并诱导线粒体生物发生。在这里,我们用NR治疗线粒体肌病小鼠。这种维生素通过强有力地诱导骨骼肌和棕色脂肪组织中的线粒体生物发生,防止线粒体超微结构异常和mtDNA缺失形成,有效地延缓了早期和晚期疾病的进展。NR进一步刺激线粒体未折叠蛋白反应,提示其在线粒体疾病中的保护作用。这些结果表明NR和提高NAD+水平的策略是线粒体肌病的一种有希望的治疗策略。
Nutrient availability is the major regulator of life and reproduction, and a complex cellular signaling network has evolved to adapt organisms to fasting. These sensor pathways monitor cellular energy metabolism, especially mitochondrial ATP production and NAD+/NADH ratio, as major signals for nutritional state. We hypothesized that these signals would be modified by mitochondrial respiratory chain disease, because of inefficient NADH utilization and ATP production. Oral administration of nicotinamide riboside (NR), a vitamin B3 and NAD+ precursor, was previously shown to boost NAD+ levels in mice and to induce mitochondrial biogenesis. Here, we treated mitochondrial myopathy mice with NR. This vitamin effectively delayed early- and late-stage disease progression, by robustly inducing mitochondrial biogenesis in skeletal muscle and brown adipose tissue, preventing mitochondrial ultrastructure abnormalities and mtDNA deletion formation. NR further stimulated mitochondrial unfolded protein response, suggesting its protective role in mitochondrial disease. These results indicate that NR and strategies boosting NAD+ levels are a promising treatment strategy for mitochondrial myopathy.
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