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相关概念视频

Drug-Receptor Interactions01:29

Drug-Receptor Interactions

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Drug-receptor interaction describes the binding of receptors by drugs, but not all drug-receptor interactions result in activation and tissue response. For instance, the binding of agonists activates the receptor to generate a cellular reaction, while antagonists bind to receptors without causing their activation.
Several parameters, such as the drug's affinity for its receptor and its efficacy, which is its ability to activate the receptor, determine the drug's effect on the tissue....
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The Two-State Receptor Model01:29

The Two-State Receptor Model

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The two-state receptor model explains a drug's interaction with receptors, such as G protein-coupled receptors and ligand-gated ion channels, to induce or inhibit a biological response. When no natural ligands are present, a receptor exists in an equilibrium of inactive (Ri) and active (Ra) conformations. The inactive form does not produce a response, while the active form generates a basal effect known as constitutive activity.
The binding affinity of a drug determines its interaction with...
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Drug-Receptor Bonds01:25

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Drug-receptor bonds are formed through various chemical forces when drugs interact with target cells. Covalent bonds, strong and irreversible, are exemplified by DNA-alkylating anticancer agents that inhibit cell division. However, such irreversible drug binding lacks selectivity and can modify the DNA of the surrounding healthy cells. Covalent binding often contributes to tissue toxicity, as seen with chloroform and paracetamol metabolites binding to the liver, causing hepatotoxicity.
In...
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The Equilibrium Binding Constant and Binding Strength02:18

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The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:
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Quantitative Aspects of Drug-Receptor Interaction01:30

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The receptor occupancy theory connects a drug's response to the number of occupied receptors. With higher drug concentrations, more receptors are occupied, leading to increased responses. The formation of drug-receptor complexes involves association and dissociation rates, which reach equilibrium when the forward and backward reactions are equal. The equilibrium association constant (Ka) and its inverse, the equilibrium dissociation constant (Kd), indicate drug affinity. Higher Ka and lower...
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相关实验视频

Updated: Jun 19, 2025

Creating Highly Specific Chemically Induced Protein Dimerization Systems by Stepwise Phage Selection of a Combinatorial Single-Domain Antibody Library
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CBD与CBDP:比较体外受体结合活动

Mehdi Haghdoost1, Scott Young2, Alisha K Holloway3

  • 1Nalu Bio Inc., 38 Keyes Avenue, Suite 117, San Francisco, CA 94129, USA.

International journal of molecular sciences
|July 27, 2024
PubMed
概括

大麻二醇 (CBDP) 和大麻二醇 (CBD) 具有相似的活性,而CBD是一个略强的CB2受体对手. 意想不到的是,CBDP与CBD不同,在片受体中充当积极的全调节器.

关键词:
激进分子的激进分子.它们是对手的对手.在Cannabidiol中使用.大麻比迪醇 (Cannabidiphorol) 是一种大麻素受体的受体大麻素受体

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科学领域:

  • 药理学 药理学是指药理学的学科.
  • 生物化学 生物化学
  • 分子生物学分子生物学

背景情况:

  • 具有七碳基链 (醇) 的植物性大麻素,如大麻二醇 (CBDP),因其被认为比较短链的类似物具有更高的功效而引起了人们的注意.
  • 大麻二醇 (CBDP) 和四大麻二醇 (THCP) 在商业上可用,但它们的生物活性在很大程度上仍未被描述.

研究的目的:

  • 研究与大麻 (CBD) 相比,CBDP的体外受体结合活性和相对强度.
  • 探索CBDP与大麻素,血清素和阿片类受体的相互作用.

主要方法:

  • 在体外受体结合实验中,评估CBDP在CB1 / CB2受体的对抗性,在5HT-1A和多巴胺D2S受体的对抗性,以及在片受体的调制性.
  • 放射性配体结合试验用于确定主要的生物标.
  • 分子对接模拟以阐明受体相互作用的结构机制.

主要成果:

  • CBDP和CBD表现出类似的活性概况,CBD显示出作为CB2受体对手的强度略大 (p <0.05).
  • 鉴定出CB2受体可能是CBDP的主要点,尽管这两种大麻素的效果不如SR144528.
  • CBDP在片受体上表现出意想不到的正调节器 (PAM) 活性,与大麻素的预期负调节器 (NAM) 作用形成鲜明对比.

结论:

  • 与预期相反,CBDP本质上并不比CBD更强大,并且在片受体上表现出明显的相互作用概况.
  • 分子对接表明CBDP和met-enkephalin与mu-opioid受体的联合结合,解释了观察到的PAM效应.
  • 需要进一步的研究才能充分理解CBDP独特受体相互作用的药理学影响.