What QC Documentation Should Accompany a Custom Cell Line?

A complete package has seven parts:

1. Genotype — junction or edit sequence, with the method used.
2. Zygosity — homozygous, heterozygous, or mixed, with the assay (digital PCR or sequencing).
3. Copy number / integration — single or multiple, verified.
4. Expression — target transcript and protein, plus the reporter or effector where relevant.
5. Identity — STR profile or equivalent, and species confirmation.
6. Sterility — mycoplasma, and any additional testing agreed.
7. Stability — passage number at delivery, growth characteristics, and storage records.

If a supplier cannot produce items 1–3 for an edited line, the line cannot support a claim.

The third row is the one most often missing from supplier documentation and most often responsible for irreproducible reporter lines.

• • Which clone(s), and how many were screened? A single clone is a single sample.
• • Matched control line from the same campaign — essential for any comparison.
• • Karyotype if the line will be cultured long-term or used for fragile edits.
• • Functional validation — not just expression, but the assay the line was built for.
• • Raw data, not only conclusions: sequencing traces, ddPCR plots, blot images.

Suppliers who hold this information can usually provide it; those who do not are telling you something.

Additional items apply:

• • Pluripotency markers and differentiation capacity, with the assay used.
• • Differentiation protocol and efficiency, plus marker validation of the derived cells.
• • Batch records for organoids, since batch variability is intrinsic to the system.

Copy this into a procurement email:

• • Edit description and genomic coordinates
• • Junction/edit sequence with method
• • Zygosity with method and primer/probe sequences
• • Copy number with method
• • Transcript and protein data with controls
• • STR profile and species
• • Mycoplasma result and date
• • Passage number at delivery, freezing records
• • Matched parental or non-targeting control
• • Functional validation relevant to the intended assay

Every engineered line ships with the seven-part package above, plus matched controls from the same campaign, raw sequencing and ddPCR data, and — where the project requires it — functional validation in the assay the line was built for.

Describe your intended use; we will confirm which documentation your application requires and deliver it with the line. Contact EDITGENE to request a project consultation or quote.

Documentation requirements depend on the intended use: research, publication, regulated preclinical work, or clinical manufacturing each demand different evidence.

A document set describes the line at delivery; continued culture changes it, and re-verification at the passage of use remains the user's responsibility.

• • American Type Culture Collection. Cell line authentication and misidentification guidance.
• • Geraghty RJ, et al. Guidelines for the use of cell lines in biomedical research. British Journal of Cancer. 2014;111:1021–1046.
• • Sentmanat MF, et al. A survey of validation strategies for CRISPR-Cas9 editing. Scientific Reports. 2018;8:888.