Why does RMCE improve target validation in hPSCs?

RMCE enables precise, locus-specific transgene insertion at the AAVS1 safe harbor, generating isogenic lines free of random integrations. This reduces variability in functional assays and supports accurate assessment of gene overexpression or knockdown effects. The method yields characterized lines in 15 days, accelerating target hypothesis testing.

How does independent variable isolation support discovery pipeline efficiency?

By using RMCE to insert transgenes at a defined locus, researchers isolate the effect of the introduced sequence from positional or copy-number variability. This independent variable control enhances reproducibility across experiments and enables reliable comparison between conditions. The approach reduces confounding factors that can obscure target mechanism interpretation.

What quantitative measurements enable RMCE line characterization?

Flow cytometry quantifies the percentage of cells expressing the donor transgene (e.g., tdT) and loss of the cassette marker (e.g., GFP), confirming RMCE efficiency. PCR validates full cassette exchange and absence of random integrations in the donor and flippase vectors. These orthogonal readouts ensure line quality before downstream use.

Why do dual selection requirements matter for cross-functional collaboration?

Positive selection with puromycin enriches for RMCE donor insertion, while negative selection with FIAU eliminates random integrations and selects for FRT-mediated recombination. This two-step process ensures that resulting lines are both transgene-positive and integration-free, increasing confidence in data sharing across teams. The standardized protocol supports reproducible handoff between discovery and preclinical groups.

What statistical analysis is required before implementing RMCE in screening workflows?

Implementation requires confirmation of transfection efficiency above 30% to ensure sufficient editing yield. Flow cytometry data must demonstrate uniform, high-purity populations of RMCE-positive cells (e.g., GFP-negative, tdT-positive) across replicates. Consistency in selection timing and agent concentration is critical to maintain statistical power in comparative screens.

Snelle en efficiënte generatie van recombinant humaan pluripotente stamcellen door Recombinase-gemedieerde Cassette Exchange in de AAVS1 Locus

10K weergaven

Geciteerd door 3

11:36 min

20 november 2016

10.3791/54718-v

20 november 2016

10K weergaven

Laura Ordovás^*¹ , Ruben Boon^*¹ , Mariaelena Pistoni¹ , Yemiao Chen¹ , Rangarajan Sambathkumar¹ , Nicky Helsen¹ , Jolien Vanhove¹ , Pieter Berckmans¹ , Qing Cai¹ , Kim Vanuytsel¹ , Susanna Raitano¹ , Catherine M. Verfaillie¹

¹Stem Cell Institute, Katholieke Universiteit Leuven

^* These authors contributed equally

Hier melden wij een snelle en efficiënte gen-editing methode op basis van RMCE in de AAVS1 locus van menselijke pluripotente stamcellen (hPSCs), die verbetert eerder beschreven systemen. Met deze techniek kan isogene lijnen snel en betrouwbaar worden gegenereerd voor goede vergelijkende studies vergemakkelijkt-gemedieerde transgenese onderzoek met hPSCs.