التفاصيل البيبلوغرافية
| العنوان: |
DDAH-1 maintains endoplasmic reticulum-mitochondria contacts and protects dopaminergic neurons in Parkinson’s disease |
| المؤلفون: |
Yichen Zhao, Weiwei Shen, Minjie Zhang, Min Guo, Yunxiao Dou, Sida Han, Jintai Yu, Mei Cui, Yanxin Zhao |
| المصدر: |
Cell Death and Disease, Vol 15, Iss 6, Pp 1-15 (2024) |
| بيانات النشر: |
Nature Publishing Group, 2024. |
| سنة النشر: |
2024 |
| المجموعة: |
LCC:Cytology |
| مصطلحات موضوعية: |
Cytology, QH573-671 |
| الوصف: |
Abstract The loss of dopaminergic neurons in the substantia nigra is a hallmark of pathology in Parkinson’s disease (PD). Dimethylarginine dimethylaminohydrolase-1 (DDAH-1) is the critical enzyme responsible for the degradation of asymmetric dimethylarginine (ADMA) which inhibits nitric oxide (NO) synthase and has been implicated in neurodegeneration. Mitochondrial dysfunction, particularly in the mitochondria-associated endoplasmic reticulum membrane (MAM), plays a critical role in this process, although the specific molecular target has not yet been determined. This study aims to examine the involvement of DDAH-1 in the nigrostriatal dopaminergic pathway and PD pathogenesis. The distribution of DDAH-1 in the brain and its colocalization with dopaminergic neurons were observed. The loss of dopaminergic neurons and aggravated locomotor disability after rotenone (ROT) injection were showed in the DDAH-1 knockout rat. l-arginine (ARG) and NO donors were employed to elucidate the role of NO respectively. In vitro, we investigated the effects of DDAH-1 knockdown or overexpression on cell viability and mitochondrial functions, as well as modulation of ADMA/NO levels using ADMA or ARG. MAM formation was assessed by the Mitofusin2 oligomerization and the mitochondrial ubiquitin ligase (MITOL) phosphorylation. We found that DDAH-1 downregulation resulted in enhanced cell death and mitochondrial dysfunctions, accompanied by elevated ADMA and reduced NO levels. However, the recovered NO level after the ARG supplement failed to exhibit a protective effect on mitochondrial functions and partially restored cell viability. DDAH-1 overexpression prevented ROT toxicity, while ADMA treatment attenuated these protective effects. The declines of MAM formation in ROT-treated cells were exacerbated by DDAH-1 downregulation via reduced MITOL phosphorylation, which was reversed by DDAH-1 overexpression. Together, the abundant expression of DDAH-1 in nigral dopaminergic neurons may exert neuroprotective effects by maintaining MAM formation and mitochondrial function probably via ADMA, indicating the therapeutic potential of targeting DDAH-1 for PD. |
| نوع الوثيقة: |
article |
| وصف الملف: |
electronic resource |
| اللغة: |
English |
| تدمد: |
2041-4889 |
| Relation: |
https://doaj.org/toc/2041-4889 |
| DOI: |
10.1038/s41419-024-06772-w |
| URL الوصول: |
https://doaj.org/article/4264c15967d0484381131ccc6b2a65d8 |
| رقم الانضمام: |
edsdoj.4264c15967d0484381131ccc6b2a65d8 |
| قاعدة البيانات: |
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