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    標題: Docosahexaenoic Acid Promotes Dopaminergic Differentiation in Induced Pluripotent Stem Cells and Inhibits Teratoma Formation in Rats With Parkinson-Like Pathology
    作者: Chang, Yuh-Lih
    Chen, Shih-Jen
    Kao, Chung-Lan
    Hung, Shih-Chieh
    Ding, Dah-Ching
    Yu, Cheng-Chia
    Chen, Yi-Jen
    Ku, Hung-Hai
    Lin, Chin-Po
    Lee, Kun-Hsiung
    Chen, Yu-Chih
    Wang, Jhi-Joung
    Hsu, Chuan-Chih
    Chen, Liang-Kung
    Li, Hsin-Yang
    Chiou, Shih-Hwa
    貢獻者: 藥學系
    休閒保健管理系
    關鍵字: Parkinson'S Disease
    Dopamine
    Induced Pluripotent Stem Cells (Ips)
    Dopaminergic Neurons
    Docosahexaenoic Acid (Dha)
    3T-Mri
    日期: 2012-01
    上傳時間: 2014-03-21 16:18:21 (UTC+8)
    出版者: Cognizant Communication Corp
    摘要: Parkinson's disease (PD) is a neurodegenerative disorder characterized by the degeneration of dopaminergic (DA) neurons in the midbrain. Induced pluripotent stem (iPS) cells have shown potential for differentiation and may become a resource of functional neurons for the treatment of PD. However, teratoma formation is a major concern for transplantation-based therapies. This study examined whether functional neurons could be efficiently generated from iPS cells using a five-step induction procedure combined with docosahexaenoic acid (DHA) treatment. We demonstrated that DHA, a ligand for the RXR/Nurr1 heterodimer, significantly activated expression of the Nurr1 gene and the Nurr1-related pathway in iPS cells. DHA treatment facilitated iPS differentiation into tyrosine hydroxylase (TH)-positive neurons in vitro and in vivo and functionally increased dopamine release in transplanted grafts in PD-like animals. Furthermore, DHA dramatically upregulated the endogenous expression levels of neuroprotective genes (Bcl-2, Bcl-xl, brain-derived neurotrophic factor, and glial cell-derived neurotrophic factor) and protected against 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced apoptosis in iPS-derived neuronal precursor cells. DHA-treated iPS cells significantly improved the behavior of 6-hydroxydopamine (6-OHDA)-treated PD-like rats compared to control or eicosapentaenoic acid-treated group. Importantly, the in vivo experiment suggests that DHA induces the differentiation of functional dopaminergic precursors and improves the abnormal behavior of 6-OHDA-treated PD-like rats by 4 months after transplantation. Furthermore, we found that DHA treatment in iPS cell-grafted rats significantly downregulated the mRNA expression of embryonic stem cell-specific genes (Oct-4 and c-Myc) in the graft and effectively blocked teratoma formation. Importantly, 3 Tesla-magnetic resonance imaging and ex vivo green fluorescence protein imaging revealed that no teratomas were present in transplanted grafts of DHA-treated iPS-derived DA neurons 4 months after implantation. Therefore, our data suggest that DHA plays a crucial role in iPS differentiation into functional DA neurons and that this approach could provide a novel therapeutic approach for PD treatment.
    關聯: Cell Transplantation, v.21 n.1 pp.313-332(20)
    Appears in Collections:[藥學系(所)] 期刊論文
    [休閒保健管理系(所)] 期刊論文

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