CCNE1 and infection: In order to analyse whether T. gondii-triggered host cell cycle S-phase arrest in HUVEC was related to host cell cyclin E1 overexpression and how early in the parasite intracellular development occurred, we focused on analysing the role of MYR1 and HCE1 in inducing S-phase arrest, by performing infections with TgΔmyr1- and TgΔhce1 tachyzoites.