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相关概念视频

Long-term Potentiation01:35

Long-term Potentiation

Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Long-term Depression01:05

Long-term Depression

Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
Ribosomal RNA Synthesis02:53

Ribosomal RNA Synthesis

Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
Long-term Potentiation01:25

Long-term Potentiation

Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
LTP can occur when presynaptic neurons...
Long-term Depression01:03

Long-term Depression

Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
Calcium Ion Concentration Mechanism
If over time, all...
Long-Term Memory01:18

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...

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Repeated stimulation of feeding mechanoafferents in <i>Aplysia</i> generates responses consistent with the release of food.

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相关实验视频

Updated: Jul 14, 2026

Improved Preparation and Preservation of Hippocampal Mouse Slices for a Very Stable and Reproducible Recording of Long-term Potentiation
09:39

Improved Preparation and Preservation of Hippocampal Mouse Slices for a Very Stable and Reproducible Recording of Long-term Potentiation

Published on: June 26, 2013

长期记忆需要多ADP-ribosylation.

Malka Cohen-Armon1, Leonid Visochek, Ayelet Katzoff

  • 1Neufeld Cardiac Research Institute, Sheba Medical Center, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 69978, Israel. marmon@post.tau.ac.il

Science (New York, N.Y.)
|June 19, 2004
PubMed
概括

在Aplysia神经元中的PolyADP-ribose-polymerase 1激活对于长期记忆形成至关重要. 这一过程通过解密染色体来促进基因转录,有助于在没有DNA损伤的情况下巩固记忆.

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Investigation of Synaptic Tagging/Capture and Cross-capture using Acute Hippocampal Slices from Rodents
11:29

Investigation of Synaptic Tagging/Capture and Cross-capture using Acute Hippocampal Slices from Rodents

Published on: September 4, 2015

Quantifying Subcellular Ubiquitin-proteasome Activity in the Rodent Brain
09:25

Quantifying Subcellular Ubiquitin-proteasome Activity in the Rodent Brain

Published on: May 21, 2019

相关实验视频

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Improved Preparation and Preservation of Hippocampal Mouse Slices for a Very Stable and Reproducible Recording of Long-term Potentiation
09:39

Improved Preparation and Preservation of Hippocampal Mouse Slices for a Very Stable and Reproducible Recording of Long-term Potentiation

Published on: June 26, 2013

Investigation of Synaptic Tagging/Capture and Cross-capture using Acute Hippocampal Slices from Rodents
11:29

Investigation of Synaptic Tagging/Capture and Cross-capture using Acute Hippocampal Slices from Rodents

Published on: September 4, 2015

Quantifying Subcellular Ubiquitin-proteasome Activity in the Rodent Brain
09:25

Quantifying Subcellular Ubiquitin-proteasome Activity in the Rodent Brain

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科学领域:

  • 神经科学是一个神经科学.
  • 分子生物学分子生物学
  • 遗传学 是一个遗传学.

背景情况:

  • 聚ADP-ribose-polymerase 1 (PARP1) 通常与真核细胞中DNA损伤的修复有关.
  • 它在神经元活动中的激活及其在记忆形成中的作用呈现出了新的发现.
  • 将PARP1与记忆巩固联系在一起的分子机制尚未完全理解.

研究的目的:

  • 为了研究PolyADP-ribose-polymerase 1 (PARP1) 在Aplysia的长期记忆背后的神经元过程中的作用.
  • 探索PARP1激活有助于记忆形成的机制.
  • 为了确定PARP1-介导的多ADP-ribosylation是否影响长期记忆所需的基因转录.

主要方法:

  • 利用Aplysia作为研究长期记忆的模型生物.
  • 研究了神经元在学习过程中的PolyADP-ribose-polymerase 1 (PARP1) 的激活.
  • 研究了PARP1活性对染色质结构和基因转录的影响.

主要成果:

  • 聚ADP-ribose-polymerase 1 (PARP1) 在参与长期记忆的Aplysia神经元中被激活.
  • 在学习过程中激活PARP1对于长期记忆的形成至关重要.
  • 通过PARP1的PolyADP-ribosylation导致染色质结构的短暂脱凝.

结论:

  • 在学习过程中PolyADP-ribose-polymerase 1 (PARP1) 激活是Aplysia中长期记忆的关键事件.
  • 通过PARP1介导的染色质解密促进了对记忆巩固所需的基因转录.
  • 这种机制允许记忆形成而不引起DNA链断裂,突出了PARP1在神经元可塑性中的新功能.