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Preclinical Development: Overview01:28

Preclinical Development: Overview

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Preclinical development consists of a series of tests that ensure the safety and efficacy of a new therapeutic compound before it is tested in humans. There are four main phases to this process. First, safety pharmacology tests are conducted to ensure the drug does not produce any acutely harmful effects. These tests examine parameters such as bronchoconstriction, cardiac dysrhythmias, blood pressure changes, and ataxia. Next, preliminary toxicological testing is performed to determine the...
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Clinical development focuses on how the drug will interact with the human body and encompasses four key phases of clinical trials, each serving a specific purpose in assessing the safety and effectiveness of new drugs. These phases overlap and build upon one another. Phase I involves a small group of healthy volunteers (typically 20-80 individuals) or, in cases where significant toxicity is expected, patients with the targeted disease, such as cancer or AIDS. The volunteers are tested for...
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Drug Discovery: Overview01:26

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Drug discovery is a multifaceted process involving extensive screening, testing, and optimization of lead compounds to identify potential new drugs for therapeutic use. It combines several approaches, including screening large numbers of natural products, chemical modification of known active molecules, identification of new drug targets, and rational design based on biological mechanisms and drug-receptor structure. These approaches are carried out in both academic research laboratories and...
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Drugs, the chemical agents used in diagnosing, treating, or preventing diseases, undergo a four-phase process of development: pharmaceutic, pharmacokinetics, pharmacodynamics, and therapeutic.
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In Vitro Drug Release Testing: Overview, Development and Validation01:10

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In vitro dissolution and drug release tests assess how quickly and how much of a drug is released from its dosage form into an aqueous medium under standardized laboratory conditions. These tests are essential tools in pharmaceutical development and quality assurance, offering insight into the drug's performance before clinical use.During formulation development, dissolution testing identifies incomplete or inconsistent drug release issues. It also supports decisions on selecting the optimal...
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Drug Regulation01:25

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Drug regulation encompasses the management of drug usage by evaluating its safety and efficacy through assessments conducted by regulatory authorities. Regrettably, the history of drug regulation is marred by several catastrophic events. One such incident is the Elixir Sulfanilamide tragedy, in which the toxic compound diethyl glycol was included in a sweet-tasting medication, leading to numerous fatalities. This event prompted the enactment of the Food, Drug, and Cosmetic Act in 1938. Under...
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药物开发 药物开发

Samar Padder1, Whitaker Cohn1, Jesus J Campagna1

  • 1University of California, Los Angeles (UCLA), Los Angeles, CA, USA.

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PubMed
概括
此摘要是机器生成的。

研究人员在阿尔茨海默氏症 (AD) 模型中发现了新型的小分子,可以提高神经保护性分泌集群蛋白 (sCLU) 的水平. 化合物DL-357减少了tau病理和改善了记忆力,为AD提供了一个有前途的新治疗策略.

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科学领域:

  • 神经科学是一个神经科学.
  • 药理学 药理学是指药理学的学科.
  • 遗传学 是一个遗传学.

背景情况:

  • 集群蛋白 (CLU) 是阿尔茨海默病 (AD) 的关键遗传风险因素.
  • 分泌的异构体 (sCLU) 是神经保护性,而核形式 (nCLU) 是神经毒性.
  • 降低的sCLU水平会加剧AD病理和认知能力下降.

研究的目的:

  • 确定增强sCLU水平的小分子,用于一种新的AD治疗方法.
  • 评估化合物在体外和体内AD模型中的疗效.
  • 研究sCLU增强化合物的治疗潜力,以减轻AD病理.

主要方法:

  • 高通量选确定了sCLU增强化合物.
  • 药用化学优化了候选人的功效和大脑透性.
  • 在AD小鼠模型 (ApoE4TR-5XFAD和3xTg-AD) 中评估了领先候选DDL-357的临床前疗效.
  • 通过蛋白质组学和神经元外生长试验,探索了分子机制.

主要成果:

  • 抑制BET蛋白,但不是HDACs,强烈增加sCLU.
  • 在AD小鼠中,BET抑制剂DDL-357证明了大脑透和增加sCLU.
  • 在3xTg-AD小鼠中,DLL-357降低了酸化和改善了记忆力.
  • 蛋白质组学揭示了DLL-357对参与线粒体健康和突触可塑性的蛋白质进行上调.

结论:

  • 一个新的sCLU增强化合物的类提供了一个有前途的AD治疗策略.
  • DDL-357显示了解决AD驱动因素和支持神经保护的潜力.
  • 进一步开发DDL-357是有必要的,有可能进行更大的临床前研究.