List of contaminated cell lines

Cell line contamination, often resulting from the inadvertent growth of a different cell type, has been a longstanding challenge in biological research. These issues compromise the authenticity of experiments, leading to questionable results and scientific conclusions. While the implications of using contaminated cell lines are profound, the problem has remained largely underreported. This article aims to provide an in-depth exploration of known contaminated cell lines, detailing their origins, implications, and the efforts made to mitigate these challenges.

Historical Context

Cell lines are crucial for biomedical research, acting as models for studying cellular mechanisms and drug testing. However, as early as the 1960s, researchers identified contamination issues, with HeLa cells being one of the most notorious perpetrators<ref> Gartler, S. M. (1968). Apparent HeLa cell contamination of human heteroploid cell lines. Nature, 217(5130), 750-751.</ref>.

Notable Contaminated Cell Lines

The following list encompasses some of the most recognized contaminated cell lines, though it's important to note that the actual number is believed to be much higher.

• Intestinal 407 - Originally believed to be derived from embryonic human intestine but later found to be contaminated with HeLa cells<ref>Lucey, B. P., Nelson-Rees, W. A., & Hutchins, G. M. (2009). Henrietta Lacks, HeLa cells, and cell culture contamination. Archives of pathology & laboratory medicine, 133(9), 1463-1467.</ref>.
• Chang liver - A cell line thought to have originated from a human liver, but later found to be from a HeLa derivative.
• KB - Initially considered a cell line from human carcinoma, it was subsequently revealed to be derived from HeLa cells.

Implications of Using Contaminated Cell Lines

The ramifications of utilizing contaminated cell lines in research are multifold:

• Misleading scientific data: Research outcomes based on these cell lines can be distorted, leading to incorrect conclusions.
• Waste of resources: Financial and human resources expended on experiments involving contaminated cell lines yield no genuine scientific advancements.
• Reputation damage: Publications based on contaminated cell lines can harm the credibility of journals and researchers.

Efforts to Address Contamination

Given the severe implications, various strategies have been employed to tackle the problem:

• Authentication protocols: Many journals now mandate cell line authentication before accepting research for publication<ref>Barallon, R., Bauer, S. R., Butler, J., Capes-Davis, A., Dirks, W. G., Elmore, E., ... & Nims, R. W. (2010). Recommendation of short tandem repeat profiling for authenticating human cell lines, stem cells, and tissues. In vitro cellular & developmental biology. Animal, 46(9), 727-732.</ref>.
• Cell line databases: Repositories, such as the International Cell Line Authentication Committee (ICLAC), list known misidentified cell lines to caution researchers.

Conclusion

The issue of cell line contamination underscores the necessity for meticulous laboratory practices, regular cell line authentication, and ongoing vigilance. As science progresses, the importance of ensuring the purity and authenticity of cell lines remains paramount for maintaining the integrity and reliability of biomedical research.

References

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