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関連する概念動画

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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関連する実験動画

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

長期記憶には,ポリADP-リボシライゼーションが必要です.

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
まとめ

AplysiaニューロンにおけるPolyADP-リボゼポリメラーゼ1の活性化は,長期記憶形成に不可欠である. このプロセスは,クロマチンを解密することによって遺伝子転写を促進し,DNAの損傷なしに記憶の統合を助けます.

さらに関連する動画

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

関連する実験動画

Last 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

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

科学分野:

  • 神経科学は神経科学である.
  • 分子生物学は分子生物学である.
  • 遺伝学 遺伝学とは

背景:

  • PolyADP-リボース-ポリメラーゼ1 (PARP1) は,通常,真核細胞のDNA損傷修復と関連しています.
  • ニューロンの活動中の活性化と記憶形成における役割は,新しい発見を提示します.
  • PARP1と記憶の統合を結びつける分子メカニズムは完全に理解されていません.

研究 の 目的:

  • Aplysiaにおける長期記憶の基礎となる神経のプロセスにおけるPolyADP-リボゼ-ポリメラーゼ1 (PARP1) の役割を調査する.
  • PARP1の活性化が記憶形成に寄与するメカニズムを探求する.
  • PARP1媒介のポリADPリボシライゼーションが,長期記憶に必要な遺伝子転写に影響を与えるかどうかを決定する.

主な方法:

  • 長期記憶の研究のモデル生物としてアプリシアを活用した.
  • 学習中のニューロンにおけるPolyADP-リボゼ-ポリメラーゼ1 (PARP1) の活性化を研究した.
  • PARP1の活性がクロマチンの構造と遺伝子転写に及ぼす影響を調査した.

主要な成果:

  • PolyADP-リボース-ポリメラーゼ1 (PARP1) は,長期記憶に関与するアプリシアニューロンで活性化されます.
  • 学習中のPARP1の活性化は,長期記憶の形成に不可欠である.
  • PARP1によるPolyADP-リボシライゼーションは,クロマチン構造の一時的な解密につながります.

結論:

  • 学習中のPolyADP-リボゼ-ポリメラーゼ1 (PARP1) アクティベーションは,Aplysiaにおける長期記憶の重要なイベントです.
  • PARP1媒介のクロマチンの解密は,記憶の統合に必要な遺伝子転写を促進します.
  • このメカニズムは,DNA鎖の断裂を誘導することなく記憶形成を可能にし,神経の可塑性におけるPARP1の新しい機能を強調しています.