HUVECs were treated with LPS for 48 h, and cells in control group were not given any treatment, and then LPS-treated HUVECs were transfected with si-NC, si-HULC, si-HULC + anti-miR-NC or si-HULC + anti-miR-204-5p. (A) MiR-204-5p expression was detected by qRT-PCR. (B,C) The cell viability and apoptosis were evaluated by using MTT and Flow cytometry assays, respectively. (D,E) Western blot assay was performed to examine the protein levels of Bcl-2, Bax, cleaved-caspase3, TNFα, IL-6, IL-8 and IL-1β. (F–H) ROS, SOD and MDA productions were determined by using DCFH-DA method and a commercial kit. *P<0.05.