Citation

  • Authors: D'Oto A. et al.
  • Year: 2021
  • Journal: Nat Commun 12 7204
  • Applications: in vitro / DNA / PEIpro
  • Cell type: HEK-293T
    Description: Human embryonic kidney Fibroblast
    Known as: HEK293T, 293T

Method

Plasmids were maxipreped by using NucleoBond Xtra EF kits according to manufacturer’s protocol. Lentivirus was produced by transient transfection of PEI-pro DNA complex (6 µg of TLCV2-RB1, 3 µg of 1-1r, 1 µg RTR, 1 µg of VSVg with 22 µl of PEI pro in 400 µl of DMEM medium) with 5 × 106 HEK293T cells in 10 ml complete medium (DMEM, 100 U/mL penicillin/streptomycin, 1× L-glutamine and 10% FBS) in a 10 cm dish. Virus supernatant was collected every 8–12 h for 3 days, which were passed through a 0.45 μm filter and concentrated by ultracentrifuge at 50,000g for 1.5 h at 4 °C

Abstract

The H3K27me2/me3 histone demethylase KDM6B is essential to neuroblastoma cell survival. However, the mechanism of KDM6B action remains poorly defined. We demonstrate that inhibition of KDM6B activity 1) reduces the chromatin accessibility of E2F target genes and MYCN, 2) selectively leads to an increase of H3K27me3 but a decrease of the enhancer mark H3K4me1 at the CTCF and BORIS binding sites, which may, consequently, disrupt the long-range chromatin interaction of MYCN and E2F target genes, and 3) phenocopies the transcriptome induced by the specific CDK4/6 inhibitor palbociclib. Overexpression of CDK4/6 or Rb1 knockout confers neuroblastoma cell resistance to both palbociclib and the KDM6 inhibitor GSK-J4. These data indicate that KDM6B promotes an oncogenic CDK4/6-pRB-E2F pathway in neuroblastoma cells via H3K27me3-dependent enhancer-promoter interactions, providing a rationale to target KDM6B for high-risk neuroblastoma.

Pubmed