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Chibaya, Loretah; Murphy, Katherine C; DeMarco, Kelly D; Gopalan, Sneha; Liu, Haibo; Parikh, Chaitanya N; Lopez-Diaz, Yvette; Faulkner, Melissa; Li, Junhui; Morris, 4th, John P; Ho, Yu-Jui; Chana, Sachliv K; Simon, Janelle; Luan, Wei; Kulick, Amanda; de Stanchina, Elisa; Simin, Karl; Zhu, Lihua Julie; Fazzio, Thomas G; Lowe, Scott W; Ruscetti, Marcus
Nature cancer, 06/2023, Letnik: 4, Številka: 6Journal Article
Immunotherapies that produce durable responses in some malignancies have failed in pancreatic ductal adenocarcinoma (PDAC) due to rampant immune suppression and poor tumor immunogenicity. We and others have demonstrated that induction of the senescence-associated secretory phenotype (SASP) can be an effective approach to activate anti-tumor natural killer (NK) cell and T cell immunity. In the present study, we found that the pancreas tumor microenvironment suppresses NK cell and T cell surveillance after therapy-induced senescence through enhancer of zeste homolog 2 (EZH2)-mediated epigenetic repression of proinflammatory SASP genes. EZH2 blockade stimulated production of SASP chemokines CCL2 and CXCL9/10, leading to enhanced NK cell and T cell infiltration and PDAC eradication in mouse models. EZH2 activity was also associated with suppression of chemokine signaling and cytotoxic lymphocytes and reduced survival in patients with PDAC. These results demonstrate that EZH2 represses the proinflammatory SASP and that EZH2 inhibition combined with senescence-inducing therapy could be a powerful means to achieve immune-mediated tumor control in PDAC.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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