Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan.
Biomedical Research Core, Tohoku University Graduate School of Medicine, Sendai 980-0872, Japan.
Int J Mol Sci. 2022 Aug 24;23(17):9572. doi: 10.3390/ijms23179572.
Mitochonic Acid 5 (MA-5) enhances mitochondrial ATP production, restores fibroblasts from mitochondrial disease patients and extends the lifespan of the disease model "Mitomouse". Additionally, MA-5 interacts with mitofilin and modulates the mitochondrial inner membrane organizing system (MINOS) in mammalian cultured cells. Here, we used the nematode to investigate whether MA-5 improves the Duchenne muscular dystrophy (DMD) model. Firstly, we confirmed the efficient penetration of MA-5 in the mitochondria of MA-5 also alleviated symptoms such as movement decline, muscular tone, mitochondrial fragmentation and Ca accumulation of the DMD model. To assess the effect of MA-5 on mitochondria perturbation, we employed a low concentration of rotenone with or without MA-5. MA-5 significantly suppressed rotenone-induced mitochondria reactive oxygen species (ROS) increase, mitochondrial network fragmentation and nuclear destruction in body wall muscles as well as endogenous ATP levels decline. In addition, MA-5 suppressed rotenone-induced degeneration of dopaminergic cephalic (CEP) neurons seen in the Parkinson's disease (PD) model. Furthermore, the application of MA-5 reduced mitochondrial swelling due to the null mutation. These results indicate that MA-5 has broad mitochondrial homing and MINOS stabilizing activity in metazoans and may be a therapeutic agent for these by ameliorating mitochondrial dysfunction in DMD and PD.
线粒体酸 5(MA-5)可增强线粒体 ATP 产生,修复来自线粒体疾病患者的成纤维细胞,并延长疾病模型“Mitomouse”的寿命。此外,MA-5可与肌联蛋白相互作用,并调节哺乳动物培养细胞中的线粒体内膜组织系统(MINOS)。在这里,我们使用线虫来研究 MA-5 是否可以改善杜氏肌营养不良症(DMD)模型。首先,我们证实 MA-5 可以有效地穿透线虫的线粒体,并且 MA-5 还可以缓解 DMD 模型的运动能力下降、肌肉张力、线粒体碎片化和 Ca 积累等症状。为了评估 MA-5 对线粒体扰动的影响,我们使用了低浓度的鱼藤酮和/或 MA-5。MA-5 显著抑制了鱼藤酮诱导的线虫体壁肌肉中线粒体活性氧(ROS)增加、线粒体网络碎片化和核破坏以及内源性 ATP 水平下降。此外,MA-5 抑制了帕金森病(PD)模型中鱼藤酮诱导的多巴胺能头(CEP)神经元变性。此外,MA-5 抑制了由于 null 突变导致的线粒体肿胀。这些结果表明,MA-5 在后生动物中有广泛的线粒体归巢和 MINOS 稳定活性,并且可能通过改善 DMD 和 PD 中的线粒体功能障碍成为这些疾病的治疗剂。