1. Academic Validation
  2. ATF4 Gene Network Mediates Cellular Response to the Anticancer PAD Inhibitor YW3-56 in Triple-Negative Breast Cancer Cells

ATF4 Gene Network Mediates Cellular Response to the Anticancer PAD Inhibitor YW3-56 in Triple-Negative Breast Cancer Cells

  • Mol Cancer Ther. 2015 Apr;14(4):877-88. doi: 10.1158/1535-7163.MCT-14-1093-T.
Shu Wang 1 Xiangyun Amy Chen 1 Jing Hu 1 Jian-Kang Jiang 2 Yunfei Li 1 Ka Yim Chan-Salis 1 Ying Gu 1 Gong Chen 3 Craig Thomas 2 B Franklin Pugh 1 Yanming Wang 4
Affiliations

Affiliations

  • 1 Center for Eukaryotic Gene Regulation, Department of Biochemistry and Molecular Biology, Pennsylvania State University, State College, Pennsylvania.
  • 2 National Center for Advancing Translational Sciences, National Institutes of Health, Bethesda, Maryland.
  • 3 Department of Chemistry, Pennsylvania State University, State College, Pennsylvania.
  • 4 Center for Eukaryotic Gene Regulation, Department of Biochemistry and Molecular Biology, Pennsylvania State University, State College, Pennsylvania. yuw12@psu.edu.
Abstract

We previously reported that a pan-PAD inhibitor, YW3-56, activates p53 target genes to inhibit Cancer growth. However, the p53-independent Anticancer activity and molecular mechanisms of YW3-56 remain largely elusive. Here, gene expression analyses found that ATF4 target genes involved in endoplasmic reticulum (ER) stress response were activated by YW3-56. Depletion of ATF4 greatly attenuated YW3-56-mediated activation of the mTORC1 regulatory genes SESN2 and DDIT4. Using the ChIP-exo method, high-resolution genomic binding sites of ATF4 and CEBPB responsive to YW3-56 treatment were generated. In human breast Cancer cells, YW3-56-mediated cell death features mitochondria depletion and Autophagy perturbation. Moreover, YW3-56 treatment effectively inhibits the growth of triple-negative breast Cancer xenograft tumors in nude mice. Taken together, we unveiled the Anticancer mechanisms and therapeutic potentials of the pan-PAD inhibitor YW3-56.

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