関連する実験動画

Updated: Feb 2, 2026

Identification of Dopamine D1-Alpha Receptor Within Rodent Nucleus Accumbens by an Innovative RNA In Situ Detection Technology

Identification of Dopamine D1-Alpha Receptor Within Rodent Nucleus Accumbens by an Innovative RNA In Situ Detection Technology

Published on: March 27, 2018

報酬の行動はヒポカンプス・アキュンベンス・シナプスの強さによって制御されます

Tara A LeGates¹, Mark D Kvarta^1,2, Jessica R Tooley³

¹Department of Physiology, University of Maryland School of Medicine, Baltimore, MD, USA.

|November 28, 2018

まとめ

ヒッポカンプス・ヌクレウス・アクンベンズ (NAc) シナプスにおける長期的増強 (LTP) は,報酬に関連する行動を誘発する. ストレスがこのシナプス的な可塑性を損なうことでアネドニアを引き起こしますが抗うつ薬はこの効果を逆転させることができます

科学分野:

神経科学
行動神経科学
シナプスの可塑性

背景:

報酬の処理は生存と動機づけの行動に不可欠です
報酬経路の調節不良は依存症やうつ病 (アネドニア) などの症状に関わっている
核アキュンベンスの (NAc) 殻へのヒポカンプスの入力が報酬に関連する活動に不可欠です.

研究の目的:

ヒッポカンプス-NAcシナプスの長期増強 (LTP) のメカニズムを調査する.
この部位のシナプス可塑性が報酬に関連する行動に寄与するかどうかを判断する
慢性的なストレスと抗うつ薬の治療がヒポカンプス-NAcのシナプス可塑性と報酬行動に与える影響を調べる

主な方法:

マウスにおける高周波刺激を用いたヒポカンプス-NAcシナプスのLTP誘導.
報酬行動の尺度として条件付きの場所の好み (CPP) の評価.
慢性的なストレスと抗うつ薬の治療後のシナプス強さとLTPの評価

主要な成果:

高周波刺激により,海馬とNAcのシナプスでドーパミン依存のLTPが誘発された.
これらのシナプスでのLTP誘導は,条件付きの場所偏好 (CPP) を誘導した.
慢性的なストレスはシナプスの強さを低下させ,LTPを低下させ,抗うつ薬の治療はこれらの変化を逆転させました.

結論:

ヒポカンプス-NAcシナプスは活動に依存した可塑性を示す.
hippocampus-NAcシナプスのシナプス強さは,文脈的な報酬行動に不可欠です.
ヒッポカンプス-NAcのシナプス可塑性の調節は,アネドニアの治療目標である可能性があります.

さらに関連する動画

Analysis of Gene Expression Changes in the Rat Hippocampus After Deep Brain Stimulation of the Anterior Thalamic Nucleus

Analysis of Gene Expression Changes in the Rat Hippocampus After Deep Brain Stimulation of the Anterior Thalamic Nucleus

Published on: March 8, 2015

Studying Food Reward and Motivation in Humans

Studying Food Reward and Motivation in Humans

Published on: March 19, 2014

関連する概念動画

The Synapse

The Synapse

Neurons communicate with one another by passing on their electrical signals to other neurons. A synapse is the location where two neurons meet to exchange signals. At the synapse, the neuron that sends the signal is called the presynaptic cell, while the neuron that receives the message is called the postsynaptic cell. Note that most neurons can be both presynaptic and postsynaptic, as they both transmit and receive information.

The Nucleus

The Nucleus

The nucleus is a membrane-bound organelle that acts as a control center in a eukaryotic cell. It contains chromosomal DNA, which controls gene expression and precisely regulates the production of proteins within the cell. In contrast, the DNA inside the mitochondria and chloroplast only carries out functions that are specific to those organelles.
Arrangement of DNA within Nucleus
The regulation of gene expression inside the nucleus is dependent on many factors, including the DNA structure. The...

The Nucleus

The Nucleus

The nucleus is a membrane-bound organelle that acts as a control center in a eukaryotic cell. It contains chromosomal DNA, which controls gene expression and precisely regulates the production of proteins within the cell. In contrast, the DNA inside the mitochondria and chloroplast only carries out functions that are specific to those organelles.
Arrangement of DNA within Nucleus
The regulation of gene expression inside the nucleus is dependent on many factors, including the DNA structure. The...

Acid Strength and Molecular Structure

Acid Strength and Molecular Structure

Binary Acids and Bases
In the absence of any leveling effect, the acid strength of binary compounds of hydrogen with nonmetals (A) increases as the H-A bond strength decreases down a group in the periodic table. For group 17, the order of increasing acidity is HF < HCl < HBr < HI. Likewise, for group 16, the order of increasing acid strength is H2O < H2S < H2Se < H2Te. Across a row in the periodic table, the acid strength of binary hydrogen compounds increases with increasing...

Regulated mRNA Transport

Regulated mRNA Transport

In eukaryotes, transcription and translation are compartmentalized; an mRNA is first synthesized in the nucleus and then selectively transported to the cytoplasm for protein synthesis. Before transport, a pre-mRNA undergoes several steps of post-transcriptional modifications including splicing, 5' capping, and the addition of a poly-adenine tail. Various proteins bind to the pre-mRNA during these modifications. The mRNA transport takes place with the help of multiple proteins playing...

Strength of Cement

Strength of Cement

Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...