利用 STING 信号和自然杀伤细胞克服同源重组缺陷乳腺癌的 PARP 抑制剂抗药性

IF 12.5 1区 医学 Q1 ONCOLOGY Cancer research Pub Date : 2025-03-11 DOI:10.1158/0008-5472.can-24-2531
Flaminia Pedretti, Mohmed Abdalfttah, Benedetta Pellegrino, Francesca Mateo, Paula Martínez-Sanz, Andrea Herencia-Ropero, Andreu Òdena, Pau Clavell-Revelles, Giorgia Casali, Heura Domenech, Laia Monserrat, Dražen Papić, Alba Mas Malavila, Anna Pascual-Reguant, Herena Eixarch, Marta Guzman, Olga Rodriguez, Judit Grueso, Sara Simonetti, Roberta Fasani, Paolo Nuciforo, Carmen Espejo, Stefan Florian, Miguel Ángel Pujana, Lara Nonell, Joan Seoane, Viia Valge-Archer, Mark J. O'Connor, Juan C. Nieto, Holger Heyn, Judith Balmaña, Alba Llop-Guevara, Violeta Serra
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HRD also activates the cyclic GMP–AMP synthase (cGAS)-STimulator of INterferon Genes (STING)-Interferon (IFN) pathway, highlighting the need to understand the impact of cGAS-STING-IFN signaling on PARPi efficacy. In this study, we analyzed a cohort of thirty-five breast cancer (BC) patient-derived xenografts (PDX) and mouse-derived allografts (MDA). PARPi sensitivity correlated with HRD, increased genomic instability, and activation of the cGAS-STING-IFN signaling pathway. Single-cell analyses showed that IFN signaling and IFN-based immune interactions were suppressed in preclinical models with acquired resistance to PARPi, lacking concomitant clonal expansion of functional CD8+ T cells. However, the combination of PARPi and a novel STING agonist (STINGa) increased immune infiltration and resulted in superior antitumor activity in these tumors. Notably, the efficacy of PARPi monotherapy and the combination treatment with a STINGa was dependent on Natural Killer (NK) cells. In agreement, BC patients with BRCA1/BRCA2 mutations and good responses to PARPi showed higher abundancy of CD56+ NK cells in the tumor microenvironment and treatment-engaged CD56bright NK cells in the peripheral immune compartment, compared to those with poor responses. 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Harnessing STING Signaling and Natural Killer Cells overcomes PARP Inhibitor Resistance in Homologous Recombination Deficient Breast Cancer
Homologous recombination deficiency (HRD) contributes to genomic instability and leads to sensitivity to poly ADP-ribose polymerase inhibitors (PARPi). HRD also activates the cyclic GMP–AMP synthase (cGAS)-STimulator of INterferon Genes (STING)-Interferon (IFN) pathway, highlighting the need to understand the impact of cGAS-STING-IFN signaling on PARPi efficacy. In this study, we analyzed a cohort of thirty-five breast cancer (BC) patient-derived xenografts (PDX) and mouse-derived allografts (MDA). PARPi sensitivity correlated with HRD, increased genomic instability, and activation of the cGAS-STING-IFN signaling pathway. Single-cell analyses showed that IFN signaling and IFN-based immune interactions were suppressed in preclinical models with acquired resistance to PARPi, lacking concomitant clonal expansion of functional CD8+ T cells. However, the combination of PARPi and a novel STING agonist (STINGa) increased immune infiltration and resulted in superior antitumor activity in these tumors. Notably, the efficacy of PARPi monotherapy and the combination treatment with a STINGa was dependent on Natural Killer (NK) cells. In agreement, BC patients with BRCA1/BRCA2 mutations and good responses to PARPi showed higher abundancy of CD56+ NK cells in the tumor microenvironment and treatment-engaged CD56bright NK cells in the peripheral immune compartment, compared to those with poor responses. Therefore, these findings propose the combination of PARPi and STINGa as a potential novel strategy to enhance the therapeutic response in patients with acquired PARPi resistance and highlight a pivotal role of NK cells in the PARPi antitumor activity.
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来源期刊
Cancer research
Cancer research 医学-肿瘤学
CiteScore
16.10
自引率
0.90%
发文量
7677
审稿时长
2.5 months
期刊介绍: Cancer Research, published by the American Association for Cancer Research (AACR), is a journal that focuses on impactful original studies, reviews, and opinion pieces relevant to the broad cancer research community. Manuscripts that present conceptual or technological advances leading to insights into cancer biology are particularly sought after. The journal also places emphasis on convergence science, which involves bridging multiple distinct areas of cancer research. With primary subsections including Cancer Biology, Cancer Immunology, Cancer Metabolism and Molecular Mechanisms, Translational Cancer Biology, Cancer Landscapes, and Convergence Science, Cancer Research has a comprehensive scope. It is published twice a month and has one volume per year, with a print ISSN of 0008-5472 and an online ISSN of 1538-7445. Cancer Research is abstracted and/or indexed in various databases and platforms, including BIOSIS Previews (R) Database, MEDLINE, Current Contents/Life Sciences, Current Contents/Clinical Medicine, Science Citation Index, Scopus, and Web of Science.
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