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相关概念视频

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 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 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

Anoosha Attaran1

  • 1The University of Western Ontario, London, ON, Canada.

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概括
此摘要是机器生成的。

使用人性化小鼠和先进生物标志物的新临床前管道的开发可以提高对像帕金森病 (PD) 这样的同核蛋白病变的药物发现的准确性. 这种方法提高了神经退行性疾病治疗结果的预测.

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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.

背景情况:

  • 全球老年人人口正在增长,导致神经退行性疾病的患病率增加,包括同核蛋白病变 (帕金森病,莱维体痴呆症,阿尔茨海默病).
  • 针对同核蛋白病变的药物开发面临着挑战,原因是动物模型的可翻译性差,以及预测治疗成功的认知生物标志物有限.
  • 目前的研究旨在创建一个全面的临床前药物发现管道,整合人性化小鼠,神经化学,成像和认知生物标志物,以提高预测准确度.

研究的目的:

  • 开发和验证用于同核蛋白病变的临床前药物发现管道.
  • 通过使用综合生物标志物,提高治疗疗效和不良反应的预测准确度.
  • 改进临床前发现的转化为神经退行性疾病治疗的临床成功.

主要方法:

  • 在人性化小鼠模型中使用了人性同核素的预制纤维素 (PFF) 注射.
  • 使用基于触摸屏的高通量认知任务来评估认知缺陷.
  • 综合纤维光度测量用于多巴胺动力学,免疫光,光片显微镜和MRI用于病理和解剖评估.
  • 启动了测试治疗干预措施的实验,包括药物,基因操纵和针对α-synuclein (a-Syn) 毒性的疫苗.

主要成果:

  • 注射PFF的小鼠在运动障碍之前在视觉歧视和条件学习任务中表现出显著的认知缺陷.
  • 在注射PFF的自由行为小鼠中观察到改变了多巴胺动力学.
  • 认知和神经化学变化与酸化a-Syn通过皮质 - 状 - thalamic网络传播的增加相关.
  • 核磁共振扫描显示空间缩模式模仿人类同核蛋白病变.
  • 初步数据表明,治疗可以减轻a-Syn毒性并改善认知缺陷.

结论:

  • 建立了一个临床前的管道,整合了人性化的小鼠,认知任务,神经化学监测和成像.
  • 该管道展示了改善治疗疗效和同核蛋白病变的不良影响预测的潜力.
  • 旨在加快针对同核蛋白病变的有效治疗方法的开发,并减少晚期药物失效.