ドロソフィラの嫌悪的な学習中にネガティブなバレンスの情報を伝達するグリア
Tomoyuki Miyashita1, Kanako Murakami1,2, Emi Kikuchi1
1Learning and Memory Project, Tokyo Metropolitan Institute of Medical Science, Tokyo 156-8506, Japan.
まとめ
覆い状腺 (EG) は,グルタミン酸をキノコ体 (MBs) に放出することによって,ドロソフィラの嫌悪情報を伝達する. このグルタミン酸の放出は 関連学習に不可欠であり 条件付けの過程で誤った関連を防止します
科学分野:
- 神経科学
- グリアル生物学
- 動物 の 行動
背景:
- ドロソフィラの嫌悪的な嗅覚条件付けは,ショックの情報をキノコ体 (MBs) に伝達する必要があります.
- この嫌悪的バレンスの伝達のための正確な細胞メカニズムは,まだ完全に理解されていません.
研究 の 目的:
- ドロソフィラの嗅覚学習の過程で嫌悪的な情報を伝達するエンスチングリア (EG) の役割を調査する.
- EGが関連学習に寄与する分子メカニズムを解明する.
主な方法:
- ドロソフィラのモデルを使って 嫌悪的な嗅覚条件を研究した.
- 封じ込めグリア (EG) で操作された膀外細胞症.
- EG活性化とグルタミン酸シグナルの学習と記憶への影響を評価した.
主要な成果:
- ショックは,MBsを取り巻くアシスングリア (EG) から膀性グルタミン酸エクソサイトスを誘発する.
- EGエクソシトーシスをブロックすると,嫌悪的な学習が妨げられ,EGを活性化すると,嫌悪的な刺激が置かれます.
- EGからのグルタミン酸は,MBのNMDA受容体と結合し,匂いの露出中にCa2+の流入を可能にします.
- EGエクソサイトーシスはドーパミンの放出を引き起こし,不適切な結合を防ぐ.
結論:
- 包膜腺 (EG) は,膀性グルタミン酸放出経由で負のバレンスの情報を伝達するために重要である.
- このメカニズムはドロソフィラの嗅覚システムにおける 関連学習に不可欠です
- EGは,嫌悪的バレンスをシグナルし,ドーパミンの放出を調節することによって,学習に多面的な役割を果たします.
関連する概念動画
Negative Regulator Molecules
32.1K
Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
32.1K
Robbers Cave
13.6K
During the 1950s, the landmark Robbers Cave experiment demonstrated that when groups must compete with one another, intergroup conflict, hostility, and even violence may result. At the Oklahoman summer camp, two troops of boys—termed the Rattlers and the Eagles—took part in a week-long tournament. During this time, their negativity culminated in derogatory name-calling, fistfights, and even vandalism and destruction of property. However, this work also revealed that such tension...
13.6K
Stereotype Threat and Self-fulfilling Prophecies
28.1K
When we hold a stereotype about a person, we have expectations that he or she will fulfill that stereotype. A self-fulfilling prophecy is an expectation held by a person that alters his or her behavior in a way that tends to make it true. When we hold stereotypes about a person, we tend to treat the person according to our expectations. This treatment can influence the person to act according to our stereotypic expectations, thus confirming our stereotypic beliefs. Research by Rosenthal and...
28.1K
Classical Conditioning
14.2K
Associative learning, a core principle in behavioral psychology, involves forming connections between events and facilitating learned responses. This concept is vividly illustrated by classical conditioning, a process extensively studied by the Russian physiologist Ivan Pavlov. Pavlov's pioneering research on dogs' digestive systems led to the discovery that behaviors can be learned through association, laying the groundwork for classical conditioning.
Ivan Pavlov observed that dogs...
Ivan Pavlov observed that dogs...
14.2K
Avoidance Learning and Learned Helplessness
4.2K
Avoidance learning and learned helplessness are critical concepts in understanding behavioral responses to negative stimuli.
Avoidance learning occurs when an organism learns that a specific behavior can prevent an unpleasant outcome. For example, a student who receives a bad grade may start studying harder to avoid future poor grades. This behavior persists even when the negative outcome is no longer present. Avoidance learning is powerful because it maintains behavior in the absence of the...
Avoidance learning occurs when an organism learns that a specific behavior can prevent an unpleasant outcome. For example, a student who receives a bad grade may start studying harder to avoid future poor grades. This behavior persists even when the negative outcome is no longer present. Avoidance learning is powerful because it maintains behavior in the absence of the...
4.2K
Understanding Deception
266
Deception is a pervasive aspect of human communication. Empirical studies have shown that most individuals engage in some form of deceit on a daily basis, with approximately 20% of social exchanges involving deceptive elements. Lying follows a developmental trajectory, peaking during adolescence and declining with age, possibly due to the maturation of cognitive control and social accountability.Cognitive and Social Factors in Deception DetectionDespite its prevalence, accurately detecting...
266


