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Treating Cells as Reagents to Design Reproducible Assays.

Terry L Riss1, Richard A Moravec1, Sarah J Duellman1

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|September 17, 2021
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Summary

Reproducible high-throughput cell-based assays require consistent cell sources and standardized cell culture practices. Implementing standard operating procedures (SOPs) and cell authentication minimizes variability for reliable experimental data.

Keywords:
assay reproducibilitycell line authenticationcell number controlsphenotypic drift

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Area of Science:

  • Cell Biology
  • Assay Development
  • Biotechnology

Background:

  • Reproducibility in high-throughput cell-based assays is critical for reliable experimental outcomes.
  • In vitro cell behavior and compound responsiveness are influenced by various factors, necessitating a deeper understanding for assay development.
  • Variability in cell performance and responsiveness can arise from inconsistent cell sourcing, handling, and experimental conditions.

Purpose of the Study:

  • To outline strategies for enhancing the reproducibility of high-throughput cell-based assays.
  • To emphasize the importance of understanding in vitro cell behavior and factors influencing compound responsiveness.
  • To provide guidance on implementing standardized practices for consistent and reliable cell-based assay results.

Main Methods:

  • Adoption of good cell culture practices and establishment of detailed standard operating procedures (SOPs) for cell handling.
  • Implementation of cell line authentication and documentation of cell source to ensure data integrity.
  • Utilization of standardized subculture procedures or cryopreserved cells to mitigate biological variability like phenotypic drift.
  • Application of multiplex methods for real-time measurement of cell viability and number to address dispensing inconsistencies and edge effects.

Main Results:

  • Standardized SOPs, including cell source documentation and authentication, reduce variability and improve peer acceptance of data.
  • Mitigation of biological variability through standardized subculturing or cryopreservation enhances experimental consistency.
  • Multiplex methods enable data normalization and identification of proliferation or cytotoxicity, improving assay accuracy.

Conclusions:

  • Adherence to good cell culture practices and standardized procedures is fundamental for reproducible cell-based assays.
  • Cell line authentication and consistent cell handling are essential for generating reliable and acceptable experimental data.
  • Multiplex cell counting serves as a valuable internal control for normalizing data and assessing cellular responses in assays.