专家点评 Cell Stem Cell︱李亚东/罗艳佳/宋娟等发现改善AD认知情感损害新策略
该研究发现,只需激活大约300个经过SuM环路修饰的ABNs即可改善AD小鼠认知情感障碍(图3)。其创新性在于:在功能上,尽管ABN数量较少,但是靶向少量的ABN即可改善行为;在理论上,提出需要综合改善ABN数量、成熟度和神经元活性才可实现对认知和情感功能拯救;在机制解析上,发现激活SuM环路修饰的ABN提高海马神经网络活性,促进小胶质细胞对淀粉样斑块的吞噬作用,在分子机制上,提供了潜在的蛋白靶点,为临床转化和药物开发提供方向(参考综述,详见“逻辑神经科学”报道(点击阅读):Curr Opin Neurobiol︱UNC 李亚东/罗艳佳/宋娟综述多水平调控成年海马神经发生改善记忆和情感功能)。本研究提出的通过干预觉醒核团(SuM),调控神经发生;进而通过激活ABN改善记忆和情感功能的新策略可能成为干预AD认知和情感损害的新方法。
研究不足:本研究尚存的不足:①只使用了过表达AD模型小鼠,添加APP knock-in模型小鼠可能更好的模拟AD的病理特征;②小胶质细胞吞噬淀粉样蛋白斑块的长期效应尚未确定;③如何利用本研究发现的蛋白靶点进行药物开发和临床转化还有待研究。
段树民(中国科学院院士, 浙江大学教授、医药学部主任,复旦大学脑科学转化研究院院长,上海交通大学松江研究院院长)
记忆的发生和调控机制以及如何改善神经退行性疾病(如AD)的记忆障碍是当今神经科学研究的热点和难点问题。宋娟课题组的最新研究从全新的角度提出调控经过下丘脑SuM神经环路修饰的海马新生神经元可能是改善AD小鼠记忆和情感障碍的新策略,并在机制上做出探索:发现激活SuM修饰的海马新生神经元增强海马突触可塑性,增加小胶质细胞对淀粉样斑块的吞噬作用,扩展了调控海马神经发生改善记忆的机制。
有趣的是,下丘脑SuM核团是重要的促觉醒脑区。我们前期研究发现激活基底前脑胆碱能神经元促觉醒(韩勇,Current biology 2014),而基底前脑胆碱能神经元对海马依赖的记忆编码发挥重要调控作用,且在AD中受损。以上研究提示觉醒系统受损在AD记忆障碍发生中可能发挥重要作用。
黄志力(复旦大学基础医学院教授、药理学系主任,中国睡眠研究会理事长)
觉醒是记忆和情感等行为的生物学基础,觉醒异常会导致记忆和情感障碍。UNC宋娟课题组专注于下丘脑觉醒核团乳头上核(SuM)控记忆的作用和机制研究,在前期发现SuM促进记忆提取(eLife 2020)的基础上,提出SuM通过调控海马神经发生促进学习记忆的作用和新机制(Nat Neurosci 2022; Curr Opin Neurobiol 2023),并将该策略应用于AD认知情感障碍的干预(Cell Stem Cell, 2023)。
AD的觉醒睡眠障碍的发生早于记忆损害,该研究的发现提示干预觉醒系统可能是改善AD记忆障碍的新策略。
原文链接:https://doi.org/10.1016/j.stem.2023.02.006
(照片提供自:宋娟/李亚东团队)
宋娟(左),李亚东(中),罗艳佳(右)
(照片提供自:宋娟/李亚东团队)
课题组招聘(上下滑动查看)
上海交通大学李亚东课题组诚聘副研究员和博士后。
李亚东:(联系方式:yadlee@126.com)上海交通大学松江研究院研究员,独立PI,博士生导师。研究方向:①睡眠觉醒的发生机制和对学习记忆的调控作用。②阿尔兹海默病认知情感障碍的干预策略。③成年海马神经发生的调控和对记忆情感行为的作用。李亚东课题组主要在生理和病理(神经退行性疾病)状态下,研究觉醒调控记忆的作用和机制,使用EEG/EMG记录、在体/离体电生理、高分辨率单/双光子成像、在体多通道钙信号记录、蛋白质组学和光/化学遗传学操控方法等技术,发现了腹侧基底神经节环路中伏隔核和腹侧苍白球两个重要的觉醒核团,为进一步研究觉醒调控记忆的神经环路夯实了基础(Molecular Psychiatry,2021;Nature Communications,2018);揭示了下丘脑觉醒环路促进成年海马神经发生、改善记忆的独特机制,提出了通过提高觉醒水平,促进海马神经发生改善学习记忆的新思路(eLife,2020;Nature Neuroscience,2022;Current Opinion in Neurobiology, 2023),并初步应用于改善AD认知和情感障碍(Cell Stem Cell,2023)。
代表性论著:
Li YD, et al. (2023), Activation of hypothalamic-enhanced adult-born neurons restores cognitive and affective function in Alzheimer's disease, Cell Stem Cell 30 (3)Li YD, et al. (2023), Optimizing memory performance and emotional states: multi-level enhancement of adult hippocampal neurogenesis, Current Opinion in Neurobiology, 2023, 79Li YD, et al. (2022), Hypothalamic modulation of adult hippocampal neurogenesis in mice confers activity-dependent regulation of memory and anxiety-like behavior, Nature Neuroscience 25, 630–645Li YD, et al. (2021), Ventral pallidal GABAergic neurons control wakefulness associated with motivation through the ventral tegmental pathway, Molecular psychiatry 26 (7), 2912-2928Li YD, et al. (2020), Supramammillary nucleus synchronizes with dentate gyrus to regulate spatial memory retrieval through glutamate release, Elife 9, e53129Li YD, et al. (2019), High cortical delta power correlates with aggravated allodynia by activating anterior cingulate cortex GABAergic neurons in neuropathic pain mice, Pain161 (2), 288-299
Luo YJ, Li YD, et al. (2018), Nucleus accumbens controls wakefulness by a subpopulation of neurons expressing dopamine D1 receptors, Nature communications 9 (1), 1576
UNC宋娟课题组诚聘博士后助理研究员
宋娟实验室关注成年海马神经发生和记忆情感行为。使用分子生物学(单细胞测序和蛋白质组学)、神经环路操控、在体电生理和钙信号记录、双光子成像、脑片膜片钳和行为学检测等方法,在健康和疾病(AD、焦虑/抑郁、癫痫等)模型中研究神经环路调控海马神经发生和海马新生神经元调控记忆情感的作用以及胶质细胞和神经元互作。相关研究成果发表在Nature,Nature Neuroscience (2),Cell Stem Cell(2)和Neuron(2)等期刊,并应邀为Trends in Molecular Medicine,Current Opinion in Neurobiology等期刊撰写综述。宋娟课题组经费充足(长期受多项R01项目支持),诚聘神经科学、分子生物学背景博士后。https://songlab.web.unc.eduSong Lab Selected Publications
Li YD, Luo YJ…Song J (2023), Activation of hypothalamic-enhanced adult-born neurons restores cognitive and affective function in Alzheimer's disease, Cell Stem Cell 30 (3)Li YD, Luo YJ…Song J (2022), Hypothalamic modulation of adult hippocampal neurogenesis in mice confers activity-dependent regulation of memory and anxiety-like behavior, Nature Neuroscience 25, 630–645Asrican B, Wooten J…Song J* (2020). Neuropeptides modulate local astrocytes to regulate adult hippocampal neural stem cells. Neuron 108(2):349-366.Li Y… Song J (2020). Supramammillary nucleus synchronizes with dentate gyrus to regulate spatial memory retrieval through glutamate release. eLife doi: 10.7554/eLife.53129.Yeh CY, Asrican B… Song J (2018). Mossy cells control adult neural stem cell quiescence and maintenance through a dynamic balance between direct and indirect pathways. Neuron 99(3):493-510.Bao H, Asrican B, Li W… Song J (2017). Long-range GABAergic inputs regulate neurl stem cell quiescence and control adult hippocampal neurogenesis. Cell Stem Cell 21(5):604-617.Song J… Song H (2013). Parvalbumin interneurons mediate neuronal circuitry-neurogenesis coupling in the adult hippocampus. Nature Neuroscience 16(12):1728-30.Song J… Song H (2012). Neuronal circuitry mechanism regulating adult quiescent neural stem-cell fate decision. Nature 489: 150-154.转载须知:“逻辑神经科学”特邀稿件,本内容著作权归作者和“逻辑神经科学”共同所有,欢迎个人转发分享,未经授权禁止转载,违者必究。
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【3】会议通知︱2023年成瘾与脑科学国际研讨会暨中国药物滥用防治协会成瘾与脑科学分会第一届学术会议(2023年4月9-10日,深圳)【4】会议通知︱2023中国衰老科学大会第一轮通知(2023年4月21-23日,北京)【5】会议通知︱中国神经科学学会神经影像学分会2023学术年会(2023年5月19-21日,广州)【6】学术会议预告︱Novel Insights into Glia Function & Dysfunction(2023年4月24-28日,日本)【7】会议通知︱第六届中国神经科学学会神经退行性疾病分会年会会议通知(2023年4月7-9日,湖南长沙) 参考文献(上下滑动查看) 1. Moreno-Jimenez, E.P., Flor-Garcia, M., Terreros-Roncal, J., Rabano, A., Cafini, F., Pallas-Bazarra, N., Avila, J., and Llorens-Martin, M. (2019). Adult hippocampal neurogenesis is abundant in neurologically healthy subjects and drops sharply in patients with Alzheimer's disease. Nat Med 25, 554-+.
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编辑︱王思珍
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