Efficient and crucial quality control of HAP1 cell ploidy status

DOI PDF 2 Citations
  • Tobias B. Beigl
    Department of Biomedicine, University of Bergen, 5020 Bergen, Norway
  • Ine Kjosås
    Department of Biological Sciences, University of Bergen, 5020 Bergen, Norway
  • Emilie Seljeseth
    Department of Biological Sciences, University of Bergen, 5020 Bergen, Norway
  • Nina Glomnes
    Department of Biomedicine, University of Bergen, 5020 Bergen, Norway
  • Henriette Aksnes
    Department of Biomedicine, University of Bergen, 5020 Bergen, Norway

Description

<jats:title>ABSTRACT</jats:title> <jats:p>The near-haploid human cell line HAP1 recently became a popular subject for CRISPR/Cas9 editing, since only one allele requires modification. Through the gene-editing service at Horizon Discovery, there are at present more than 7500 edited cell lines available and the number continuously increases. The haploid nature of HAP1 is unstable as cultures become diploid with time. Here, we demonstrated some fundamental differences between haploid and diploid HAP1 cells, hence underlining the need for taking control over ploidy status in HAP1 cultures prior to phenotyping. Consequently, we optimized a procedure to determine the ploidy of HAP1 by flow cytometry in order to obtain diploid cultures and avoid ploidy status as an interfering variable in experiments. Furthermore, in order to facilitate this quality control, we validated a size-based cell sorting procedure to obtain the diploid culture more rapidly. Hence, we provide here two streamlined protocols for quality controlling the ploidy of HAP1 cells and document their validity and necessity.</jats:p> <jats:p>This article has an associated First Person interview with the co-first authors of the paper.</jats:p>

Journal

  • Biology Open

    Biology Open 9 (11), bio057174-, 2020-11-12

    The Company of Biologists

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