関連する実験動画
Updated: Jun 13, 2026

13:07
One-channel Cell-attached Patch-clamp Recording
Published on: June 9, 2014
NMDA受容体依存カルシウム流入と遺伝子発現をEphB受容体を通して調節する
Mari A Takasu1, Matthew B Dalva, Richard E Zigmond
1Division of Neuroscience, Children's Hospital, and the Department of Neurobiology, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA.
まとめ
EphB受容体へのエフリンB2結合は,ニューロン内のNMDA受容体経由でカルシウムの侵入を促進します. このプロセスはチロシンリン酸化を伴い,NMDA受容体の活性とシナプス発達の遺伝子発現を刺激します.
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.
- 細胞生物学 細胞生物学
背景:
- NMDA受容体を通してのタンパク質の相互作用とカルシウムシグナル伝達は,中枢神経系のシナプス性可塑性にとって極めて重要です.
- EphB受容体チロシンキナーゼは,刺激性シナプスで発見され,NMDA受容体と相互作用します.
研究 の 目的:
- EphB受容体がNMDA受容体の機能を調節するメカニズムを解明する.
- エフリンB2-EphBシグナル伝達がNMDA受容体の活性と下流の遺伝子発現を調節する役割を調査する.
主な方法:
- 主要な皮質ニューロン培養は,タンパク質の相互作用と信号伝達経路を研究するために使用されました.
- エフリンB2刺激は,NMDA受容体のカルシウム流入とチロシンリン酸化への影響を評価するために適用されました.
- Srcファミリーのチロシンキナーゼは,エフリンB2効果のメディエーターとして調査されました.
主要な成果:
- EphB受容体のエフリンB2活性化により,NMDA受容体依存カルシウム流入が強化された.
- エフリンB2治療は,SrcファミリーキナーゼによるNMDA受容体チロシンリン酸化を誘導した.
- これらのシグナリングイベントは,強化されたNMDA受容体依存遺伝子発現につながった.
結論:
- EphB受容体のエフリンB2刺激は,NMDA受容体の機能を調節し,カルシウムシグナル伝達と遺伝子発現に影響を与えます.
- これは,シナプスリモデリングにおける活動独立 (エフリンB2/EphB) と活動依存 (NMDA受容体) 信号を統合するメカニズムを提供します.
関連する概念動画
Epigenetic Regulation
Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
Cell Specific Gene Expression
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
Exon Recombination
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon has three reading...
Exon shuffling follows “splice frame rules.” Each exon has three reading...
Receptor Downregulation in MVBs
Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR activation may...
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR activation may...
Epigenetic Regulation
Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
X-chromosome...
Role of Ephrin-Eph Signalling in Intestinal Stem Cell Renewal
Erythropoietin-producing hepatocellular carcinoma receptor (Eph) and its ligand, Eph receptor-interacting protein (Ephrin) were first discovered in the human carcinoma cell line, hence the name. Ephrin-Eph interaction guides cells to reach their appropriate location in adult tissues. They also play an essential role in the immune system by helping in immune cell migration, adhesion, and activation. Based on their structure and function, Eph is divided into two classes — EphA and EphB.

