Effect of docosahexaenoic acid on the differentiation of neural steam cells

二十二碳六烯酸对神经蒸汽细胞分化的影响

• 批准号: 17590205
• 负责人: HASHIMOTO Michio
• 金额: $ 2.24万
• 依托单位: Shimane University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17590205/
• 关键词: Neural steam cells; Docosahexaenoic acid; Neurogenesis; Memory and learning; Dementia; 分化誘導能; 海馬; 学習・記憶; ラット

Docosahexaaenoic acid (DHA), one of the main structural lipids in the mammalian brain, plays crucial roles in the development and function of brain neurons. We previously reported that chronic administration of DHA enhances long-term memory in young and aged rats, and dietary DHA has preventive and ameliorative effects on the impairment of spatial cognition learning ability in amyloid b-infused rats. These findings suggest that DHA plays crucial roles in the development and function of the CNS throughout life. In this study, we examined the 1) effect of DHA on neural differentiation of neural stem cells (NSCs) in vivo and in vitro, and 2) on the expression of basic helix-loop-helix (bHLH) transcriptional factors of the cultured cells.<Methods> NSCs obtained from 15.5-day-old rat embryos were propagated as neurospheres and cultured under differential conditions with or without DHA. Total RNA was prepared from each culture with or without DHA, and was performed RT-PCR (Hes1, Hes5, neurog … More enin1, Mash1 or NeuroD).<Results and Conclusions> 1) DHA significantly increased the number of Tuj 1-positive neurons compared with the control on cultured NSCs, and the newborn neurons in the DHA groups were morphologically more mature than in the control, DHA significantly decreased the incorporation ratio of 5-bromo-2-deoxyuridine, the mitotic division marker, during the first 24h periods. Furthermore, dietary administration of DHA significantly increased the number of 5-bromo-2-deoxyuridine(+)/NeuN(+) newborn neurons in the granule cell layer of the dentate gyrus in adult rats. These results suggested that DHA effectively promotes nuerogenesis both in vitro and in vivo.2) Treatment of NSCs with DHA decreased the expression of Hes1 mRNA compared with that of control, suggesting that DHA stimulates neuronal differentiation by modulating expression levels of bHLH transcription factors.The present study suggests that DHA has the new property of modulating hippocampal function regulated by neurogenesis. Less

二十二碳六烯酸（DHA）是哺乳动物大脑中的主要结构脂质之一，在大脑神经元的发育和功能中起着至关重要的作用。我们之前报道过，长期服用DHA可以增强年轻和老年大鼠的长期记忆，膳食DHA对淀粉样蛋白b输注的大鼠的空间认知学习能力损害具有预防和改善作用。这些研究结果表明，DHA 在整个生命过程中中枢神经系统的发育和功能中发挥着至关重要的作用。在本研究中，我们检测了 1) DHA 对体内和体外神经干细胞 (NSC) 神经分化的影响，以及 2) 对培养细胞的碱性螺旋-环-螺旋 (bHLH) 转录因子表达的影响。<方法> 将 15.5 日龄大鼠胚胎中获得的 NSC 作为神经球进行增殖，并在有或无 DHA 的不同条件下培养。从含有或不含 DHA 的每种培养物中制备总 RNA，并进行 RT-PCR（Hes1、Hes5、neurog … 更多 enin1、Mash1 或 NeuroD）。 <结果与结论> 1) 与对照组相比，DHA 培养的 NSC 中 Tuj 1 阳性神经元的数量显着增加，并且 DHA 组中新生神经元的形态学上比对照组更加成熟，DHA 显着降低了掺入 在第一个 24 小时期间，有丝分裂标记 5-溴-2-脱氧尿苷的比率。此外，饮食中给予DHA显着增加了成年大鼠齿状回颗粒细胞层中5-溴-2-脱氧尿苷(+)/NeuN(+)新生神经元的数量。这些结果表明DHA在体外和体内均能有效促进神经发生。2）与对照相比，用DHA处理NSCs后Hes1 mRNA的表达降低，表明DHA通过调节bHLH转录因子的表达水平刺激神经元分化。本研究表明DHA具有调节神经发生调节的海马功能的新特性。较少的

项目成果

地域在住高齢者の認知機能とビタミンEの関連

社区老年人认知功能与维生素E的关系

• 发表时间: 2006
• 期刊: 島根県立看護短期大学紀要 12
• 作者: 山下一也;他
• 通讯作者: 他

Nobiletin restoring β-amyloid-impaired CREB phosphorylation rescues memory deterioration in Alzheimer's disease model rats

• DOI: 10.1016/j.neulet.2006.02.077
• 发表时间: 2006-06-12
• 期刊: NEUROSCIENCE LETTERS
• 影响因子: 2.5
• 作者: Matsuzaki, Kentaro;Yamakuni, Tohru;Ohizumi, Asushi
• 通讯作者: Ohizumi, Asushi

Contribution of the suprachiasmatic nucleus to the formation of a time memory for heat exposure in rats.

视交叉上核对大鼠热暴露时间记忆形成的贡献。

• 期刊: J Physiol Sci (in press)
• 作者: Shido O;et al.;Maruyama M et al.
• 通讯作者: Maruyama M et al.

Docosahexaenoic acid-induced amelioration on impairment of memory learning in amyloid β-infused rats relates to the decreases of amyloid β and cholesterol levels in detergent-insoluble membrane fractions

• DOI: 10.1016/j.bbalip.2005.11.011
• 发表时间: 2005-12-30
• 期刊: BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR AND CELL BIOLOGY OF LIPIDS
• 影响因子: 4.8
• 作者: Hashimoto, M;Hossain, S;Shido, O
• 通讯作者: Shido, O

Myosin light chain kinase and Rho-kinase participate in P2Y receptor-mediated acceleration of permeability through the endothelial cell layer.

肌球蛋白轻链激酶和 Rho 激酶参与 P2Y 受体介导的内皮细胞层通透性加速。

• 发表时间: 2005
• 期刊: Journal of Pharmacy and Pharmacology 57
• 作者: Naoko Tanaka;et al.
• 通讯作者: et al.