Retinoic Acid and Arsenic Trioxide Induce Lasting Differentiation and Demethylation of Target Genes in APL Cells
Authors
Affiliations
Acute promyelocytic leukemia (APL) is characterized by arrested differentiation of promyelocytes. Patients treated with all-trans retinoic acid (ATRA) alone experience relapse, while patients treated with ATRA and arsenic trioxide (ATO) are often relapse-free. This suggests sustained changes have been elicited by the combination therapy. To understand the lasting effects of the combination therapy, we compared the effects of ATRA and ATO on NB4 and ATRA-resistant NB4-MR2 APL cells during treatment versus post treatment termination. After treatment termination, NB4 cells treated with ATRA or ATO reverted to non-differentiated cells, while combination-treated cells remained terminally differentiated. This effect was diminished in NB4-MR2 cells. This suggests combination treatment induced more permanent changes. Combination treatment induced higher expression of target genes (e.g., transglutaminase 2 and retinoic acid receptor beta), which in NB4 cells was sustained post treatment termination. To determine whether sustained epigenetic changes were responsible, we quantified the enrichment of histone modifications by chromatin immunoprecipitation, and CpG methylation by bisulfite-pyrosequencing. While ATRA and combination treatment induced similar histone acetylation enrichment, combination treatment induced greater demethylation of target genes, which was sustained. Therefore, sustained demethylation of target genes by ATRA and ATO combination treatment is associated with lasting differentiation and gene expression changes.
Targeting CBP and p300: Emerging Anticancer Agents.
Masci D, Puxeddu M, Silvestri R, La Regina G Molecules. 2024; 29(19).
PMID: 39407454 PMC: 11482477. DOI: 10.3390/molecules29194524.
Systems Biology for Drug Target Discovery in Acute Myeloid Leukemia.
Novikova S, Tolstova T, Kurbatov L, Farafonova T, Tikhonova O, Soloveva N Int J Mol Sci. 2024; 25(9).
PMID: 38731835 PMC: 11083274. DOI: 10.3390/ijms25094618.
Combined treatment of All-trans retinoic acid with Tamoxifen suppresses ovarian cancer.
Xu R, Yang X, Tang B, Mao Y, Jiang F Cancer Chemother Pharmacol. 2024; 94(2):259-270.
PMID: 38714534 PMC: 11390921. DOI: 10.1007/s00280-024-04671-7.
Mechanistic update of Trisenox in blood cancer.
Ananta , Benerjee S, Tchounwou P, Kumar S Curr Res Pharmacol Drug Discov. 2023; 5:100166.
PMID: 38074774 PMC: 10701371. DOI: 10.1016/j.crphar.2023.100166.
Jambrovics K, Poliska S, Scholtz B, Uray I, Balajthy Z Int J Mol Sci. 2023; 24(13).
PMID: 37446117 PMC: 10341930. DOI: 10.3390/ijms241310938.