Characteristics to consider when selecting a positive control material for an in vitro assay

Main Article Content

Elijah J. Petersen
Andrew Nguyen
Jeffrey Brown
John T. Elliott
Amy J. Clippinger
John Gordon
Nicole Kleinstreuer
Matthias Roesslein

Abstract

The use of in vitro assays to inform decision-making requires robust and reproducible results across studies, laboratories, and time. Experiments using positive control materials are an integral component of an assay procedure to demonstrate the extent to which the measurement system is performing as expected. This paper reviews ten characteristics that should be considered when selecting a positive control material for an in vitro assay: 1) the biological mechanism of action, 2) ease of preparation, 3) chemical purity, 4) verifiable physical properties, 5) stability, 6) ability to generate responses spanning the dynamic range of the assay, 7) technical or biological interference, 8) commercial availability, 9) user toxicity, and 10) disposability. Examples and a case study of the monocyte activation test are provided to demonstrate the application of these characteristics for identification and selection of potential positive control materials. Because specific positive control materials are often written into testing standards for in vitro assays, selection of the positive control material based on these characteristics can aid in ensuring the long-term relevance and usability of these standards.

Article Details

How to Cite
Petersen, E. J., Nguyen, A., Brown, J., Elliott, J. T., Clippinger, A. J., Gordon, J., Kleinstreuer, N. and Roesslein, M. (2021) “Characteristics to consider when selecting a positive control material for an in vitro assay”, ALTEX - Alternatives to animal experimentation, 38(2), pp. 365-376. doi: 10.14573/altex.2102111.
Section
BenchMarks
References

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