鉴定了一种介导记忆遗忘的恩格拉姆合奏,在牙状转中
Shiqiang Hu1, Jianfan Yang2, Siqi Yin2
1School of Life Sciences, IDG/McGovern Institute for Brain Research, MOE Key Laboratory of Protein Sciences, Tsinghua University, Beijing 100084, China; Peking University, Tsinghua University, National Institute Biological Science Joint Graduate Program, Peking, China.
Neuron
|February 4, 2026
概括
一个新的记忆模型使用了小鼠牙状环中的两个神经元组合来检索记忆和遗忘. 操纵遗忘组合 (Npas4依赖) 允许灵活的回忆,可能是认知障碍的关键.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
- 认知科学 认知科学
背景情况:
- 对于编码和灵活性的记忆电图的细胞组织还不太清楚.
- 现有的模型并不能完全解释记忆如何灵活地被检索或被遗忘.
研究的目的:
- 提出并研究一种使用两个直角神经元组合的新型Engram模型.
- 了解记忆灵活性,检索和遗忘在细胞组装层面的机制.
主要方法:
- 采用了一种小鼠模型,在牙状中具有两种不同的神经元组合 (Fos标记和Npas4依赖).
- 操纵神经元组合的重新激活,以观察对记忆检索和遗忘的影响.
- 研究了Rac1活动在调节忘记合奏中的作用.
主要成果:
- 重新激活Fos标记组合促进记忆检索.
- Npas4依赖组合的重新激活会导致遗忘,反过来转移记忆组合的重新激活.
- 通过Rac1活动针对遗忘组合,可以实现灵活的回忆结果,而不会扰乱学习的信息.
结论:
- 拟议的两组合的engram模型支持通过直角编码来实现内存的灵活性.
- 忘记组合的功能障碍与阿尔茨海默病和自闭症模型中的记忆异常有关.
- 忘记机制,特别是Rac1活动,是认知障碍的潜在治疗标.
相关概念视频
Forgetting
416
Forgetting is an intrinsic aspect of human memory, characterized by the gradual loss or inaccessibility of information over time. Hermann Ebbinghaus, a pioneering psychologist, extensively studied this phenomenon and formulated the forgetting curve. This curve illustrates that memory loss occurs rapidly immediately after learning and then decelerates over time. Several mechanisms contribute to forgetting, including encoding failure, storage decay, retrieval failure, and interference.
Encoding...
Encoding...
416
System of Memory
7.4K
Memory is categorized into three major systems: sensory memory, short-term memory (STM), and long-term memory (LTM). These systems differ in their capacity and the duration for which they can hold information. Sensory memory captures raw sensory input from the environment, holding it for just a few seconds or less. For example, on hearing a brief, loud sound, like a car horn honking, the sound seems to linger in the mind for a moment even after it stops. This is an instance of sensory memory...
7.4K
Working Memory
899
Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this...
899
Long-Term Memory
696
Long-term memory is a relatively permanent type of memory, capable of storing vast amounts of information over extended periods. Its storage capacity is generally considered unlimited.
Long-term memory can be categorized into two primary types: explicit and implicit memory. Explicit memory, also known as declarative memory, involves the conscious recollection of information that we deliberately try to remember, recall, and articulate. This type of memory encompasses specific facts, events, and...
Long-term memory can be categorized into two primary types: explicit and implicit memory. Explicit memory, also known as declarative memory, involves the conscious recollection of information that we deliberately try to remember, recall, and articulate. This type of memory encompasses specific facts, events, and...
696
Traumatic Memory
587
Emotionally traumatic events often lead to memories that are exceptionally vivid and enduring, sometimes persisting with remarkable clarity throughout an individual's life. A classic example of this phenomenon is a person who survives a car accident. Even years later, they may recall every detail of the event with startling accuracy — the screeching of the tires, the jarring impact, and the acrid smell of burning rubber. Such vividness contrasts sharply with how an individual...
587
Repressed Memory
521
Repressed memories are a psychological phenomenon where memories of traumatic events are unconsciously blocked from a person's awareness. This process occurs as a defense mechanism, protecting the mind from the emotional impact of distressing or painful experiences. For example, a person who has experienced childhood trauma may grow up with no conscious recollection of the event. In such cases, the memories are thought to be buried deep within the subconscious, inaccessible to the conscious...
521


