STING agonism enhances anti-tumor immune responses and therapeutic efficacy of PARP inhibition in BRCA-associated breast cancer

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作者
Constantia Pantelidou
Heta Jadhav
Aditi Kothari
Renyan Liu
Gerburg M. Wulf
Jennifer L. Guerriero
Geoffrey I. Shapiro
机构
[1] Dana-Farber Cancer Institute,Department of Medical Oncology
[2] Beth Israel Deaconess Medical Center and Harvard Medical School,Department of Medicine, Division of Hematology
[3] Harvard Medical School,Oncology and Cancer Research Institute
[4] Dana-Farber Cancer Institute,Ludwig Center for Cancer Research at Harvard
[5] Brigham and Women’s Hospital,Breast Tumor Immunology Laboratory, Department of Cancer Biology
[6] Brigham and Women’s Hospital and Harvard Medical School,Division of Breast Surgery, Department of Surgery
[7] Bayer Pharmaceuticals,Department of Medicine
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摘要
Poly (ADP-ribose) polymerase (PARP) inhibitors exert their efficacy via synthetic lethal effects and by inducing cGAS/STING-mediated immune responses. We demonstrate that compared to monotherapies, combined PARP inhibition and STING agonism results in increased STING pathway activation, greater cytotoxic T-cell recruitment and enhanced dendritic cell activation in BRCA1-deficient breast cancer models. The combination markedly improved anti-tumor efficacy in vivo, with evidence of complete tumor clearance, prolongation of survival and induction of immunologic memory.
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