Cell line authentication has long been recognised as a cornerstone of robust scientific research, yet misidentified and contaminated cell lines continue to undermine the reliability and reproducibility of published studies. Despite increasing awareness and the introduction of authentication guidelines, the question remains: how widespread is the problem in laboratories today?
Our perspective on cell line authentication
In our recent Frontiers perspective piece, colleagues Eleanor Ralston (Senior Scientist – Genomics) and Charlotte Haskayne (Business Manager – Cell Line QC) draw on years’ worth of cell line authentication data processed right here by our expert team. As the UK’s only commercial provider of cell line authentication, we are uniquely positioned to provide a real-world perspective on the current state of cell line quality. Our analysis reveals that cell line misidentification and cross-contamination continue to compromise research quality, despite routine authentication recommendations.
We highlight that despite strict mandates for authentication of cell lines used in research and our commercial data from 2024–2025 shows that cell line errors remain surprisingly common. In 2024 alone, 4.7% of evaluated lines were misidentified and 1.8% were contaminated. Importantly, these numbers come from organisations who routinely authenticate their cell lines; although many laboratories do not undertake this practice, and mistakenly rely on microbial contamination testing instead , suggesting the true scale of the issue may be considerably greater.
Another major concern we identified is the lack of rigorous authentication requests for primary cell lines. During the study period, none of the submitted primary lines met the stringent ASN-0002 standards for full traceability, introducing major risks to experimental reproducibility.
Additionally, while Short Tandem Repeat (STR) profiling is the gold standard for human cell lines, we emphasise that subsequent mixture analysis is essential for identifying any specific contaminants causing inconclusive results. Furthermore, because STR has its limits with non-human samples, researchers must ensure the same routine authentication of these samples via speciation methods, such as CO1 barcoding.
Ultimately, the paper serves as a strong call to action, reminding the scientific community that strict authentication workflows and meticulous traceability are non-negotiable for preserving scientific integrity, protecting research investment and ensuring reproducible, trustworthy results.
Access the full paper
Read the full open-access perspective article to explore our findings in more detail, and discover how routine cell line authentication can help protect the reliability, reproducibility and value of your research. If you’d like to strengthen your own authentication workflow, our team is here to help.
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