相关实验视频
Updated: May 23, 2026

11:03
Conditional Genetic Transsynaptic Tracing in the Embryonic Mouse Brain
Published on: December 22, 2014
生成一种合成记忆痕迹
Aleena R Garner1, David C Rowland, Sang Youl Hwang
1Department of Cell Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.
概括
在恐惧调节过程中,小鼠通过人工激活特定的神经元形成混合记忆. 这种人工神经网络激活对于记忆回忆至关重要,证明了它在记忆编码中的作用.
科学领域:
- 神经科学是一个神经科学.
- 记忆研究 记忆研究
- 行为神经科学 行为神经科学
背景情况:
- 语境恐惧记忆对于生存至关重要.
- 了解记忆编码的神经基础是神经科学的一个关键挑战.
- 人工神经激活为探测记忆形成提供了一个新的工具.
研究的目的:
- 为了研究如何人工激活一个竞争的神经表现如何影响在小鼠的上下文恐惧记忆编码.
- 为了确定人工神经刺激是否可以创建混合记忆表示.
- 探索重新激活人工刺激网络以获取记忆的必要性.
主要方法:
- 利用基于c-fos的转基因方法在小鼠神经元中表达hM(3) D(q) DREADD受体.
- 人工激活特定的神经元组合使用外部连接体在一个不同的背景下,在恐惧调节.
- 根据人工刺激的神经元模式评估记忆检索和特异性.
主要成果:
- 当一组神经元在单独的环境中在条件化过程中被人工激活时,小鼠形成了混合记忆表示.
- 恢复记忆需要人工刺激网络的重新激活.
- 形成的记忆是特定于神经元在学习过程中人工激活的空间模式.
- 类似的人工刺激,当它不是初始条件的一部分时,记忆力受损.
结论:
- 神经元组合的人工激活可以直接影响和塑造上下文恐惧记忆的编码.
- 这项研究提供了与人工诱导的神经活动相关的记忆痕迹特异性的证据.
- 这些发现突出了针对性神经刺激技术在剖析记忆机制方面的潜力.
相关概念视频
Synthetic Biology
Synthetic biology is an interdisciplinary science that involves using principles from disciplines such as engineering, molecular biology, cell biology, and systems biology. It involves remodeling existing organisms from nature or constructing completely new synthetic organisms for applications such as protein or enzyme production, bioremediation, value-added macromolecule production, and the addition of desirable traits to crops, to name a few.
Golden rice
Golden rice is a genetically modified...
Golden rice
Golden rice is a genetically modified...
Long-Term Memory
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...
System of Memory
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...
Next-generation Sequencing
The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features.
Methods of Nuclear Reprogramming
Nuclear reprogramming is a process of transforming one cell type into an unrelated cell type by epigenetic changes that alter the cell’s original gene expression pattern. Such epigenetic changes force cells to express a different set of genes, which play a significant role in inducing transformation into other cell types. Nuclear reprogramming offers applications in reproductive cloning for livestock propagation and regenerative medicine — developing patient-specific cells for injury repair.
Transcription
Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...

