单色多重定量 PCR 端粒长度测量
2024年3月22日
在这里，我们提出了一种使用单色多重定量聚合酶链反应 （MMqPCR） 测定法测量相对端粒长度 （TL） 的方案。MMqPCR 检测是一种可重复、高效且具有成本效益的方法，用于在基于人群的研究中测量人类 DNA 中的 TL。
端粒是染色体末端的重复核蛋白区域，每次细胞分裂时都会缩短，导致整个生命周期中平均端粒长度减少。我们的实验室通过测量端粒长度和基于人群的研究来研究创伤和逆境对细胞衰老的长期和代际影响。对端粒生物学的兴趣正在扩展到测量平均端粒长度之外。
正在开发新方法来评估染色体特异性端粒长度，并研究健康结果与端粒生物学其他方面（如端粒相关蛋白和 DNA 损伤）之间的联系。由实验室 PI Stacy Drury 博士领导的跨学科端粒研究网络致力于通过支持国际合作研究来提高端粒测量的严谨性和可重复性，这些研究记录了分析前因素对端粒测定精度的影响，以及建立使用 QPCR 生成的端粒长度测量值的报告指南。MMQPCR 的精度提高，可以更精细地分析早期逆境和生命历程环境暴露对细胞衰老的影响，例如，通过识别敏感期，在此期间发生的暴露对以后的生活健康结果产生更深远的影响。
概述
本文介绍了一种使用单色多重定量聚合酶链反应（MMqPCR）测定相对端粒长度（TL）的协议。MMqPCR 测定是一种可靠且有效的方法，用于在基于人群的研究中评估人类 DNA 的 TL。
关键研究组成部分
科学领域
- 细胞衰老
- 端粒生物学
- 基于人群的研究
背景
- 端粒在每次细胞分裂时会缩短，影响一生中的平均端粒长度。
- 端粒生物学研究正在扩展到包括特定染色体的端粒长度和健康结果。
- 端粒研究网络旨在提高测量的严谨性和可重复性。
- 分析前因素可能影响端粒测定的精确性。
研究目的
- 测量端粒长度及其对细胞衰老的影响。
- 研究早期逆境对健康结果的影响。
- 制定报告端粒长度测量的指南。
使用的方法
- 从外周血单核细胞制备基因组 DNA 样本。
- 使用 MMqPCR 测量端粒长度。
- 生成标准曲线以实现准确定量。
- 在测定中实施严格的控制和重复。
主要结果
- 使用 MMqPCR 提高了端粒长度测量的精确度。
- 确定了环境暴露影响健康的敏感时期。
- 建立了一个可靠的端粒长度测量协议。
结论
- MMqPCR 测定提供了一种成本效益高的端粒长度分析方法。
- 研究结果有助于理解端粒长度与健康结果之间的关系。
- 未来的研究可以在此协议基础上进一步探索端粒生物学。
常见问题
Executive Industry Relevance
Reliable telomere length quantification is increasingly critical for biopharma teams investigating cellular aging, exposure biology, and translational biomarkers. The MMqPCR protocol delivers standardized, reproducible telomere length data, supporting predictive confidence in early discovery and population-based studies. Its rigorous quality control and reporting guidelines enable robust cross-study comparisons and portfolio-level risk assessment.
Strategic Applications in Biopharma R&D
Early Discovery & Target Validation
- Enables interrogation of cellular aging pathways and their modulation by environmental exposures.
- Supports functional validation of targets linked to telomere maintenance and genome stability.
- Facilitates biological de-risking by quantifying telomere dynamics in diverse cohorts.
- Provides a quantitative readout for hypothesis-driven studies on exposure and disease risk.
Screening & Assay Development
- Delivers a validated, scalable assay for high-throughput telomere length measurement.
- Ensures reproducibility and assay standardization through rigorous control of inter- and intra-plate variation.
- Generates quantitative outputs suitable for screening compound effects on telomere biology.
- Enables platform reuse across studies and populations due to protocol efficiency and cost-effectiveness.
Translational & Preclinical Research
- Aligns telomere length as a translational biomarker for cellular aging and exposure response.
- Supports continuity from discovery through preclinical validation by enabling population-level analyses.
- Provides risk-adjusted data for advancing candidates targeting telomere-associated pathways.
- Enhances predictive de-risking by linking telomere metrics to health outcomes in relevant models.
Pipeline & Workflow Integration
The MMqPCR telomere assay integrates from early discovery through translational research, enabling hypothesis testing, pathway clarification, and biomarker development.
- Discovery Biology: Supports rigorous null hypothesis testing on telomere dynamics and exposure effects.
- Screening: Provides reproducible, quantitative telomere length outputs for compound evaluation.
- Analytics: Delivers standardized measurements and statistical outputs for cross-condition comparison.
- Translational Research: Facilitates biomarker alignment and continuity across population and preclinical studies.
- Enterprise Reuse: Establishes a repeatable, scalable capability for telomere measurement across programs.
Operational & Enterprise Impact
- Scientific Value: Increases predictive confidence and reduces mechanistic ambiguity in cellular aging research.
- Operational Value: Drives standardization, reproducibility, and scalability in telomere assays.
- Strategic Value: Enables informed go/no-go decisions and capital-efficient portfolio management.
- Portfolio Impact: Supports risk-adjusted prioritization and advancement of telomere-targeted assets.
Implementation Considerations
- Requires expertise in quantitative PCR and telomere biology for optimal assay setup and interpretation.
- Demands access to calibrated thermocyclers, multichannel pipettes, and robust data analysis software.
- Necessitates strict cross-team standardization of sample handling and quality control metrics.
- Adaptable to various human DNA sources but may require protocol adjustments for other model systems.
- Dependent on rigorous reporting of intraclass correlation coefficients and quality thresholds for reproducibility.
Biopharma FAQs
Chapters in this video
0:00
Introduction
1:49
Sample and Master Mix Preparation for Telomere Length Measurement Using Monochrome Multiplex Quantitative PCR (MMqPCR)
3:42
Preparation of 96‐Well Plate for Monochrome Multiplex Quantitative PCR (MMqPCR) for Telomere Length Measurement
6:21
Monochrome Multiplex Quantitative PCR (MMqPCR) Data Analysis to Check the Reproducibility of Telomere Length Measurements
