Best Practices for Authentication of Cell Lines to Ensure Data Reproducibility and Integrity

Area of Science:

• Cell Biology
• Biotechnology
• Research Reproducibility

Background:

• Cell line misidentification and contamination significantly impact research reproducibility.
• Commercial cell lines often lack rigorous authentication, posing a risk to experimental validity.
• Accurate cell line authentication is crucial for reliable scientific data generation.

Purpose of the Study:

• To authenticate a commercially obtained primary rabbit aortic endothelial cell line.
• To establish best practices for cell line authentication in research settings.
• To evaluate the efficacy of various authentication methods, including DNA barcoding.

Main Methods:

• Single tandem repeat (STR) testing, flow cytometry, and polymerase chain reaction (PCR) were employed for initial authentication.
• Cytochrome c oxidase subunit 1 (CO1) DNA Barcoding was performed by an in-house lab and a commercial vendor.
• Fresh rabbit cells served as a positive control for species verification.

Main Results:

• STR and flow cytometry confirmed the absence of human/mouse contamination and indicated non-endothelial origin.
• PCR and vendor analysis revealed the cells were not of rabbit origin.
• CO1 DNA Barcoding definitively identified the cell line as purely bovine, indicating misidentification rather than contamination.

Conclusions:

• The commercially supplied 'rabbit aortic endothelial cells' were misidentified and were of bovine origin.
• CO1 DNA Barcoding is a cost-effective and efficient method for confirming cell line identity.
• This study underscores the importance of rigorous cell line authentication to ensure research integrity.