Publication details

Loss of histone macroH2A1 in hepatocellular carcinoma cells promotes paracrine-mediated chemoresistance and CD4(+)CD25(+)FoxP3(+) regulatory T cells activation


LO RE Oriana MAZZA Tommaso GIALLONGO Sebastiano SANNA Paola RAPPA Francesca LUONG Tu Vinh Luong VOLTI Giovanni DVOŘÁKOVÁ Adéla ROSKAMS Tania VAN HAELE Matthias TSOCHATZIS Emmanuel VINCIGUERRA Manlio

Year of publication 2020
Type Article in Periodical
Magazine / Source THERANOSTICS
MU Faculty or unit

Faculty of Medicine

Keywords hepatocellular carcinoma; histone macroH2A1; adaptive immune system; chemoresistance
Description Rationale: Loss of histone macroH2A1 induces appearance of cancer stem cells (CSCs)-like cells in hepatocellular carcinoma (HCC). How CSCs interact with the tumor microenvironment and the adaptive immune system is unclear. Methods: We screened aggressive human HCC for macroH2A1 and CD44 CSC marker expression. We also knocked down (KD) macroH2A1 in HCC cells, and performed integrated transcriptomic and secretomic analyses. Results: Human HCC showed low macroH2A1 and high CD44 expression compared to control tissues. MacroH2A1 KD CSC-like cells transferred paracrinally their chemoresistant properties to parental HCC cells. MacroH2A1 KD conditioned media transcriptionally reprogrammed parental HCC cells activated regulatory CD4(+)/CD25(+)/FoxP3(+) T cells (Tregs). Conclusions: Loss of macroH2A1 in HCC cells drives cancer stem-cell propagation and evasion from immune surveillance.
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