Poly (ADP-Ribose) Polymerase 1 Induces Cyclic GMP-AMP Synthase-stimulator of Interferon Genes Pathway Dysregulation to Promote Immune Escape of Colorectal Cancer Cells

被引:0
|
作者
Xia, Jianhong [1 ]
Shen, Yue [1 ]
Jiang, Qian [1 ]
Li, Xin [1 ]
Yan, Yan [1 ]
Xu, Zhi [2 ]
Zhou, Liqing [1 ]
机构
[1] Xuzhou Med Univ, Huaian Hosp, Dept Radiat Oncol, 60 South Huaihai Rd, Huaian 223001, Peoples R China
[2] ICON Publ Ltd Co ICON Plc, Med Affairs, Beijing, Peoples R China
关键词
colorectal cancer; PARP-1; cGAS; STING; immune evasion;
D O I
10.1097/CJI.0000000000000543
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Colorectal cancer (CRC) ranks third globally in cancer incidence and mortality, posing a significant human concern. Recent advancements in immunotherapy are noteworthy. This study explores immune modulation for CRC treatment. Initially targeting poly (ADP-ribose) polymerase 1 (PARP-1), a gene overexpressed in CRC tissues per The Cancer Genome Atlas, we examined its correlation with immune cell infiltration using the Tumor Immune Estimation Resource tool. Quantitative reverse transcription polymerase chain reaction assessed PARP-1 mRNA and inflammation-related gene expression in tumor tissues and cells. Assessing CD8+ T-cell proliferation and cytotoxicity towards HCT116 cells involved carboxyfluorescein diacetate succinimidyl ester and lactate dehydrogenase kits. Chemotaxis was gauged using a Transwell system in a CD8+ T-cell coculture setup, with immunofluorescence revealing cyclic GMP-AMP synthase (cGAS) and stimulator of interferon genes (STING) levels in HCT116 cells. Enzyme-linked immunosorbent assay kits measured CD8+ T-cell cytokine secretion. The findings suggested that PARP-1 was overexpressed in CRC tissues and cells and this overexpression was positively correlated with Treg cell infiltration. Overexpression of PARP-1 could significantly reduce the proportion of cGAS and STING-positive cells in HCT116 cells, dampen the proliferation, tumor-killing capacity, and chemotaxis of CD8+ T cells, and inhibit the secretion of related cytokines. The introduction of STING agonists could reverse the effects caused by overexpressed PARP-1. In vivo experiments affirmed the independent anti-tumor effects of PARP-1 inhibitors and STING agonists, synergistically inhibiting tumor growth. Silencing PARP-1 in HCT116 cells potentially boosts CD8+ T-cell activity against these cells through the cGAS-STING pathway.
引用
收藏
页码:35 / 45
页数:11
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