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Neuroprotective effect of NXP031 in the MPTP-induced Parkinson's disease model
Neuroscience Letters ( IF 2.5 ) Pub Date : 2020-10-16 , DOI: 10.1016/j.neulet.2020.135425
Min Kyung Song , Joo Hee Lee , Jinil Kim , Ji Hyun Kim , Soonhye Hwang , Yoon-Seong Kim , Youn-Jung Kim

Parkinson’s disease (PD) is a neurodegenerative disease characterized by the progressive degeneration of dopaminergic neurons in the substantia nigra (SN). Oxidative stress has been identified as one of the major causes of nigrostriatal degeneration in PD. Ascorbic acid plays a role as an efficient antioxidant to protect cells from free radical damage, but it is easily oxidized and loses its antioxidant activity. To overcome this limitation, we have recently developed NXP031, a single-stranded DNA aptamer that binds to ascorbic acid with excellent specificity, reducing its oxidation and increasing its efficacy. This study investigated the neuroprotective effects of NXP031 in 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced PD model. Acute degeneration of nigral dopaminergic neurons was induced by four consecutive treatments of MPTP (20 mg/kg) in male C57BL/6 J mice. NXP031 (Vitamin C/Aptamin C 200 mg/4 mg/kg) was administered intraperitoneally for 5 days following MPTP. We observed that the administration of NXP031 ameliorated MPTP-induced loss of dopaminergic neurons in the SN and exhibited improvement of MPTP-mediated motor impairment. We further found that NXP031 increased plasma ascorbic acid levels and inhibited microglia activation-induced neuroinflammation in the SN, which might contribute to the protective effects of NXP031 on nigrostriatal degeneration. Our findings suggest that NXP031 could be a potential therapeutic intervention in PD.



中文翻译:

NXP031在MPTP诱发的帕金森氏病模型中的神经保护作用

帕金森氏病(PD)是一种神经退行性疾病,其特征是黑质(SN)中的多巴胺能神经元逐渐退化。氧化应激已被认为是PD中黑质纹状体变性的主要原因之一。抗坏血酸起着有效的抗氧化剂的作用,可以保护细胞免受自由基的破坏,但是它很容易被氧化并失去其抗氧化活性。为了克服这一限制,我们最近开发了NXP031,这是一种单链DNA适体,可与抗坏血酸具有出色的特异性,可降低其氧化作用并提高其功效。这项研究调查了NXP031在1-甲基-4-苯基-1,2,3,6-四氢吡啶(MPTP)诱导的PD模型中的神经保护作用。通过在雄性C57BL / 6 J小鼠中连续四次使用MPTP(20 mg / kg),诱导了黑色素多巴胺能神经元的急性变性。MPTP后腹膜内给予NXP031(维生素C /维生素A C 200 mg / 4 mg / kg)5天。我们观察到,NXP031的使用改善了MPTP引起的SN中多巴胺能神经元的丢失,并表现出MPTP介导的运动障碍的改善。我们进一步发现,NXP031增加了血浆中的抗坏血酸水平,并抑制了小胶质细胞活化引起的SN神经炎,这可能有助于NXP031对黑质纹状体变性的保护作用。我们的发现表明,NXP031可能是PD的潜在治疗手段。MPTP后腹膜内给予NXP031(维生素C /维生素A C 200 mg / 4 mg / kg)5天。我们观察到NXP031的使用改善了SN中MPTP引起的多巴胺能神经元的丢失,并表现出MPTP介导的运动障碍的改善。我们进一步发现,NXP031增加了血浆中的抗坏血酸水平,并抑制了小胶质细胞活化引起的SN神经炎,这可能有助于NXP031对黑质纹状体变性的保护作用。我们的发现表明,NXP031可能是PD的潜在治疗手段。MPTP后腹膜内给予NXP031(维生素C /维生素C 200毫克/ 4毫克/千克)。我们观察到,NXP031的使用改善了MPTP引起的SN中多巴胺能神经元的丢失,并表现出MPTP介导的运动障碍的改善。我们进一步发现,NXP031增加了血浆中的抗坏血酸水平,并抑制了小胶质细胞活化引起的SN神经炎,这可能有助于NXP031对黑质纹状体变性的保护作用。我们的发现表明,NXP031可能是PD的潜在治疗手段。我们进一步发现,NXP031增加了血浆中的抗坏血酸水平,并抑制了小胶质细胞活化引起的SN神经炎,这可能有助于NXP031对黑质纹状体变性的保护作用。我们的发现表明,NXP031可能是PD的潜在治疗手段。我们进一步发现,NXP031增加了血浆中的抗坏血酸水平,并抑制了小胶质细胞活化引起的SN神经炎,这可能有助于NXP031对黑质纹状体变性的保护作用。我们的发现表明,NXP031可能是PD的潜在治疗手段。

更新日期:2020-10-29
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