WRN and cancer: Quantification of the frequency of chromatin bridges and micronuclei revealed that WRN depletion did not affect baseline levels of these aberrant nuclear morphologies in the MSS CRC cancer models SK-CO-1 and SW480, while the frequency of both chromatin bridges and micronuclei was strongly increased upon WRN knock-down in the MSI-H CRC cell lines HCT 116 and RKO (Figure 5B and C).