Abstract:
:Emerging studies indicate that DNA damage in cancer cells triggers antitumor immunity, but its intrinsic regulatory mechanism in breast cancer cells remains poorly understood. Here, we show that ZMYND8 is upregulated and inhibits micronucleus formation and DNA damage in breast cancer cells. Loss of ZMYND8 triggered activation of the DNA sensor cyclic guanosine monophosphate-adenosine monophosphate synthase in micronuclei, leading to further activation of the downstream signaling effectors stimulator of interferon genes and NF-kappaB, but not TANK-binding kinase 1 and interferon regulatory factor 3, thereby inducing the expression of interferon-beta and interferon-stimulated genes (ISGs) in breast cancer cells in vitro and tumors in vivo. ZMYND8 knockout (KO) in breast cancer cells promoted infiltration of CD4+ and CD8+ T cells leading to tumor inhibition in syngeneic mouse models, which was significantly attenuated by treatment of anti-CD4/CD8 depleting antibodies or anti-IFNAR1 antibody and in immunodeficient Rag1 KO mice. In human breast tumors, ZMYND8 was negatively correlated with ISGs, CD4, CD8A, CD8B, and the tumor-lymphocyte infiltration phenotype. Collectively, these findings demonstrate that maintenance of genome stability by ZMYND8 causes breast cancer cells to evade cytotoxic T-lymphocyte surveillance which leads to tumor growth.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Wang Y,Luo M,Chen Y,Wang Y,Zhang B,Ren Z,Bao L,Wang Y,Wang JE,Fu YX,Luo W,Wang Ydoi
10.1158/0008-5472.CAN-20-1710subject
Has Abstractpub_date
2020-11-04 00:00:00eissn
0008-5472issn
1538-7445pii
0008-5472.CAN-20-1710pub_type
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