Where does target validation fit into the drug discovery pipeline?靶点验证在药物发现流程中处于什么位置？

Question

BlackTom AI · Accepted Answer

Target validation is performed early in the drug discovery pipeline, typically before any lead identification work begins.

1. Relevant knowledge points and concepts
- Target validation: experimental and computational work to confirm that modulating a molecular target (protein, receptor, enzyme, pathway) produces a desired therapeutic effect and is safe/druggable.
- Drug discovery stages: target discovery/validation → hit identification → lead optimization → preclinical development → clinical trials → regulatory approval → post‑market surveillance.
- Validation methods: genetic (knockout/knockdown), pharmacological (tool compounds), biochemical assays, cellular models, animal models, biomarker development.

2. Step‑by‑step reasoning process
- Start with a disease hypothesis and candidate molecular targets (target discovery).
- Perform target validation to demonstrate causality between target modulation and disease phenotype, and to assess feasibility for small molecules/biologics.
- Only after sufficient validation do researchers invest in high‑throughput screens or rational design to find hits and then identify leads.
- Therefore, validation logically precedes lead identification to reduce later-stage attrition and wasted resources.

3. Calculations/intermediate steps
- No numerical calculations are required. The logical sequence and experimental evidence form the “steps”: disease → target discovery → validation → hit/lead identification.

4. Why the correct answer is correct
- Answer a states validation occurs “early… before lead identification,” which matches standard drug discovery practice: validation minimizes risk and ensures any leads discovered will act on a relevant, druggable target.

5. Why other options are incorrect
- b (post‑market surveillance): That stage assesses long‑term safety/effectiveness of marketed drugs, not initial target validation.
- c (after clinical trials): Clinical trials test safety/efficacy of drug candidates; target validation must already have been done to justify the trials.
- d (only after a drug candidate has been selected): Validation is needed to select and prioritize candidates; doing it only after candidate selection would be too late and inefficient.

6. Conclusion
- Target validation belongs early in the process, before lead identification. This confirms the provided correct answer: a. Early in the drug discovery process, before lead identification.

Where does target validation fit into the drug discovery pipeline?靶点验证在药物发现流程中处于什么位置？Single choice

Similar Questions

What would be the most suitable approach in target validation if you have a disease model and a diverse library of compounds?如果你拥有疾病模型和多样化的化合物库，靶点验证中最合适的方法是什么？

What is a reverse approach in the context of target validation?在目标验证的背景下，什么是反向方法？

What is a forward approach in the context of target validation?在目标验证的背景下，什么是前瞻性方法？

Is it important to use diverse techniques to validate targets?

What encompasses a pharmacological approach to target validation?什么样的药理学方法用于靶点验证？

Is it important to use diverse techniques to validate targets?使用多样化技术验证靶点重要吗？

What encompasses a pharmacological approach to target validation?

Is it important to use diverse techniques to validate targets?

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