Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
, 438 (4), 647-52

DZNep, Inhibitor of S-adenosylhomocysteine Hydrolase, Down-Regulates Expression of SETDB1 H3K9me3 HMTase in Human Lung Cancer Cells

Affiliations

DZNep, Inhibitor of S-adenosylhomocysteine Hydrolase, Down-Regulates Expression of SETDB1 H3K9me3 HMTase in Human Lung Cancer Cells

Ju-Kyung Lee et al. Biochem Biophys Res Commun.

Abstract

3-Deazaneplanocin A (DZNep), an epigenetic anticancer drug, leads to the indirect suppression of S-adenosyl methionine-dependent cellular methylations by inhibiting S-adenosyl homocystein (AdoHcy) hydrolase. Although it is well known that DZNep targets the degradation of EZH2 protein, H3K27me3 HMTase, there are still uncertainties about the regulation of other types of HMTases during cell death. In this study, we describe that SETDB1 gene expression was regulated by DZNep treatment in human lung cancer cells. We confirm that DZNep induced growth inhibition and increased the dead cell population of lung cancer cells. DZNep treatment affected histone methylations, including H3K27me3 and H3K9me3, but not H3K4me3. Reduced levels of H3K27me3 and H3K9me3 were related with the decreased EZH2 and SETDB1 proteins. Real time PCR analysis showed that SETDB1 gene expression was decreased by DZNep treatment, but no effect was observed for EZH2 gene expression. We cloned the promoter region of SETDB1 and SUV39H1 genes, and performed luciferase assays. The promoter activity of SETDB1 gene was down regulated by DZNep treatment, whereas no effect on SUV39H1 promoter activity was observed. In conclusion, we suggest that DZNep regulates not only on H3K27me3 HMTase EZH2, but also H3K9 HMTase SETDB1 gene expression at the transcription level, implicating that the mechanism of action of DZNep targets multiple HMTases during the death of lung cancer cells.

Keywords: 3-Deazaneplanocin A; AdoHcy; AdoMet; DZNep; EED; EZH2; H3K27me3; H3K9me3; Lung cancer cells; MTT; PRC2; S-adenosyl homocystein; S-adenosyl-methionine; SETDB1; SUZ12; dimethyl thiozolyl-2′,5′-diphenyl-2-H-tetrazolium bromide; embryonic ectoderm development; enhancer of zeste homolog 2; polycomb repressor complex 2; suppressor of zeste 12; trimethylation of histone H3 at lysine 27; trimethylation of histone H3 at lysine 9.

Similar articles

See all similar articles

Cited by 23 PubMed Central articles

See all "Cited by" articles

Publication types

MeSH terms

Feedback