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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 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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The pharmacokinetic phase...
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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 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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薬物開発

Sharon Cohen1, Simon Ducharme2, Jared R Brosch3

  • 1Toronto Memory Program, Toronto, ON, Canada.

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まとめ
この要約は機械生成です。

ミベルシラン、RNA干渉治療薬は、アルツハイマー病初期の患者において良好な安全性を示し、アミロイド前駆体タンパク質を減少させました。複数の用量でsAPPβをさらに低下させ、アルツハイマー病および脳アミロイド血管症の治療の可能性を支持しました。

キーワード:
RNA干渉アルツハイマー病ミベルシランAPPsAPPβ第1相試験安全性有効性脳アミロイド血管症

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科学分野:

  • 神経科学
  • 薬理学
  • 遺伝学

背景:

  • ミベルシランは、中枢神経系(CNS)を標的とする開発中のRNA干渉(RNAi)治療薬です。
  • 以前の研究では、単回ミベルシラン投与がアミロイドβ前駆体タンパク質(APP)を効果的に低下させることが示されています。
  • 本研究では、若年発症アルツハイマー病(EOAD)患者を対象とした第1相試験の暫定的な安全性および薬力学的データを報告します。

研究 の 目的:

  • 単回および反復用量漸増投与(MAD)のミベルシランの安全性と忍容性を若年発症アルツハイマー病(EOAD)患者で評価すること。
  • 脳脊髄液(CSF)の可溶性APPベータ(sAPPβ)レベルに対するミベルシランの薬力学的効果を評価すること。
  • アルツハイマー病に対する中枢神経系標的RNAi治療薬の初期臨床データを提供すること。

主な方法:

  • EOAD患者を、ミベルシラン(25-100mg)またはプラセボの単回髄注投与に無作為化しました。
  • 一部の患者は、ウォッシュアウト後にオープンラベルでミベルシラン(6ヶ月ごとに50mg)の反復用量漸増投与を受けました。
  • 安全性は有害事象(AE)の頻度によって評価され、薬力学はCSF sAPPβレベルの変化によって評価されました。

主要な成果:

  • SADコホートでは、ほとんどのAEは軽度から中等度でした。ピーク時のCSF sAPPβ減少は、1ヶ月目に-84.5%で、10ヶ月目まで-61.1%で持続しました。MADコホートでは、重篤または重度のAEは報告されませんでした。MADでの最初のミベルシラン投与後、CSF sAPPβは-63.7%減少し、2回目の投与でさらに減少しました(-83.8%)。

結論:

  • EOAD患者において、ミベルシランの単回および反復投与は一般的に忍容性が良好でした。
  • ミベルシランは、CSF sAPPβの強力で持続的かつ用量依存的な減少を示しました。
  • 結果は、アルツハイマー病および脳アミロイド血管症に対するミベルシランのさらなる調査を支持します。