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関連する概念動画

Structure-Activity Relationships and Drug Design01:28

Structure-Activity Relationships and Drug Design

1.8K
Drug design is a dynamic field that involves discovering and developing new medications based on specific biological targets. This process heavily relies on structure-activity relationships (SAR) and quantitative structure-activity relationships (QSAR) to guide the design and optimization of efficient drugs.
SAR studies the intricate relationship between a drug's chemical structure and biological activity. It focuses on understanding how modifications to a drug's structure can influence...
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Causality in Epidemiology01:21

Causality in Epidemiology

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Causality or causation is a fundamental concept in epidemiology, vital for understanding the relationships between various factors and health outcomes. Despite its importance, there's no single, universally accepted definition of causality within the discipline. Drawing from a systematic review, causality in epidemiology encompasses several definitions, including production, necessary and sufficient, sufficient-component, counterfactual, and probabilistic models. Each has its strengths and...
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Local Anesthetics: Chemistry and Structure-Activity Relationship01:30

Local Anesthetics: Chemistry and Structure-Activity Relationship

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Local anesthetics (LAs) are drugs that induce a temporary loss of sensation in a limited body area, preventing pain. Cocaine was the first local anesthetic discovered in the late 19th century. Cocaine is a benzoic acid ester obtained from the leaves of coca shrubs and was often used for its psychotropic effects. Cocaine was first isolated in 1860 by Albert Niemann. Sigmund Freud studied the physiological actions of cocaine. Carl Koller later introduced it into clinical practice in 1884 as a...
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Bioequivalence Experimental Study Designs: Completely Randomized and Randomized Block Designs01:20

Bioequivalence Experimental Study Designs: Completely Randomized and Randomized Block Designs

248
Body:Bioequivalence experimental study designs are crucial methodologies used in evaluating and comparing the bioavailability of different drug products. These designs are categorized into various types: completely randomized, randomized block, repeated measures, cross and carry-over, and Latin square designs.Completely randomized designs involve randomly allocating treatments to all subjects participating in the experiment. This allocation is achieved by assigning unique random numbers to...
248
Cholinergic Antagonists: Chemistry and Structure-Activity Relationship01:29

Cholinergic Antagonists: Chemistry and Structure-Activity Relationship

2.8K
Cholinergic antagonists bind to cholinergic receptors and limit the effects of acetylcholine and other cholinergic agonists. Based on the specific cholinergic receptor affinity, these antagonists are classified as muscarinic or nicotinic. Anticholinergics interrupt parasympathetic innervations while sympathetic innervations remain uninterrupted. Muscarinic antagonists are also called 'muscarinic antagonists', 'antimuscarinics', or 'parasympatholytics'. Nicotinic...
2.8K
Adrenergic Agonists: Chemistry and Structure-Activity Relationship01:16

Adrenergic Agonists: Chemistry and Structure-Activity Relationship

3.9K
Adrenergic agonists' structure-activity relationship (SAR) determines their selectivity and efficacy. These agonists comprise a phenylethylamine moiety with an aromatic ring and an ethylamine side chain.
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of...
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関連する実験動画

Updated: Feb 3, 2026

Comparing Eye-tracking Data of Children with High-functioning ASD, Comorbid ADHD, and of a Control Watching Social Videos
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ADHD、ASDと脳構造の因果関係：メンデルランダム化研究

Yilu Zhao1, Yamin Zhang1, Tao Li1

  • 1Affiliated Mental Health Center and Hangzhou Seventh People's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China; Nanhu Brain-computer Interface Institute, Hangzhou, Zhejiang, China; MOE Frontier Science Center for Brain Science and Brain-machine Integration, Zhejiang University, Hangzhou, Zhejiang, China; State Key Laboratory of Brain-machine Intelligence, Zhejiang University, Hangzhou, Zhejiang, China.

Progress in neuro-psychopharmacology & biological psychiatry
|February 1, 2026
PubMed
まとめ

この研究は、注意欠陥・多動性障害（ADHD）および自閉症スペクトラム障害（ASD）に関連する特定の脳構造の違いを明らかにします。所見は前頭葉を強調しています。

キーワード:
注意欠陥・多動性障害自閉症スペクトラム障害脳構造メンデルランダム化

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Using Brain Activation nir-HEG/Q-EEG and Execution Measures CPTs in a ADHD Assessment Protocol
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Comparing Eye-tracking Data of Children with High-functioning ASD, Comorbid ADHD, and of a Control Watching Social Videos
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Transcranial Magnetic Stimulation for Investigating Causal Brain-behavioral Relationships and their Time Course
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科学分野:

  • 神経科学
  • 遺伝学
  • 精神医学

背景:

  • ADHDおよびASDなどの神経発達障害（NDD）は、世界的な健康上の大きな課題である。
  • NDDでは脳構造の変化が観察されているが、因果関係は不明確なままである。
  • 脳構造の変化の遺伝的基盤を理解することは、NDDの研究にとって重要である。

研究 の 目的:

  • 脳構造（灰白質および白質）とADHDおよびASDのリスクとの因果関係を調査する。
  • これらのNDDの病態生理に関与する特定の脳領域および白質線維束を特定する。
  • 脳構造とNDDの関係における脳機能の潜在的な媒介的役割を探る。

主な方法:

  • 2サンプルのメンデルランダム化（MR）解析を利用した。
  • 脳構造およびNDDに関する最新のゲノムワイド関連研究（GWAS）の結果を用いた。
  • 機能的MRI（fMRI）GWASデータを組み込んだ媒介解析を実施した。

主要な成果:

  • 前頭回上部の表面積の増加は、ADHDのリスク増加と因果関係がある。
  • 眼窩前頭皮質の表面積の増加は、ASDのリスク低下と関連している。
  • 特定の白質線維束、特に前頭下後頭葉線維束（IFO）および内包後部（RLIC）は、それぞれADHDおよびASDと因果関係がある。
  • 逆因果関係（NDDが脳の変化を引き起こす）の証拠は見つからなかった。
  • 脳機能は、脳構造の変化とNDDリスクの関係を媒介する。

結論:

  • 前頭葉は、ADHDおよびASDの神経生物学において重要な役割を果たしている。
  • 特定の白質経路は、これらのNDDの発症に因果関係を持って関与している。
  • 本研究結果は、遺伝学、脳構造、機能、およびNDDの複雑な相互作用に関する新たな洞察を提供する。
  • 神経科学、遺伝学、精神医学