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Dual LSD1 and HDAC6 Inhibition Induces Doxorubicin Sensitivity in Acute Myeloid Leukemia Cells

Cancers, ISSN: 2072-6694, Vol: 14, Issue: 23
2022
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Study Results from Koc University in the Area of Acute Myeloid Leukemia Published (Dual LSD1 and HDAC6 Inhibition Induces Doxorubicin Sensitivity in Acute Myeloid Leukemia Cells)

2022 DEC 23 (NewsRx) -- By a News Reporter-Staff News Editor at NewsRx Hematology Daily -- Researchers detail new data in acute myeloid leukemia. According

Article Description

Defects in epigenetic pathways are key drivers of oncogenic cell proliferation. We developed a LSD1/HDAC6 multitargeting inhibitor (iDual), a hydroxamic acid analogue of the clinical candidate LSD1 inhibitor GSK2879552. iDual inhibits both targets with IC values of 540, 110, and 290 nM, respectively, against LSD1, HDAC6, and HDAC8. We compared its activity to structurally similar control probes that act by HDAC or LSD1 inhibition alone, as well as an inactive null compound. iDual inhibited the growth of leukemia cell lines at a higher level than GSK2879552 with micromolar IC values. Dual engagement with LSD1 and HDAC6 was supported by dose dependent increases in substrate levels, biomarkers, and cellular thermal shift assay. Both histone methylation and acetylation of tubulin were increased, while acetylated histone levels were only mildly affected, indicating selectivity for HDAC6. Downstream gene expression (CD11b, CD86, p21) was also elevated in response to iDual treatment. Remarkably, iDual synergized with doxorubicin, triggering significant levels of apoptosis with a sublethal concentration of the drug. While mechanistic studies did not reveal changes in DNA repair or drug efflux pathways, the expression of AGPAT9, ALOX5, BTG1, HIPK2, IFI44L, and LRP1, previously implicated in doxorubicin sensitivity, was significantly elevated.

Bibliographic Details

Bulut, Ipek; Lee, Adam; Cevatemre, Buse; Ruzic, Dusan; Belle, Roman; Kawamura, Akane; Gul, Sheraz; Nikolic, Katarina; Ganesan, A; Acilan, Ceyda

MDPI AG

Medicine; Biochemistry, Genetics and Molecular Biology

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