Jurkat T-cell lines exhibit marked genomic instability affecting karyotype, mutational profile, gene expression,...

Area of Science:

• Biomedical research
• Cellular therapy development
• Immunology

Background:

• The Jurkat cell line is a standard T-cell model for biomedical research.
• It is frequently used for preclinical characterization of cellular therapies, including CAR T-cells.

Purpose of the Study:

• To characterize genomic, transcriptomic, and functional features of Jurkat clone E6-1 cells from multiple sources.
• To compare these features with Jurkat E6-1 cells from the ATCC.
• To assess the impact of observed variations on research reproducibility.

Main Methods:

• Chromosomal microarray analysis to identify karyotypic heterogeneity.
• Whole exome sequencing to determine mutational profiles.
• Transcriptomic profiling to assess gene expression variations.
• Immunophenotyping and cytokine production assays to evaluate functional differences.

Main Results:

• Marked karyotypic heterogeneity was observed both between and within Jurkat E6-1 populations.
• Whole exome sequencing revealed shared and unique mutational profiles.
• Transcriptomic profiles and immunophenotypes varied significantly between cell populations.
• Functional assays showed substantial variations in cytokine production.

Conclusions:

• Jurkat E6-1 cells exhibit significant genomic instability and heterogeneity.
• These genomic changes correlate with differences in protein expression and cytokine production.
• Researchers must monitor cell passage number, characterize cell lines, and refresh stocks for accurate and reproducible results.