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Engineering T cells to survive and thrive in the hostile tumor microenvironment. CURRENT OPINION IN BIOMEDICAL ENGINEERING 2022. [DOI: 10.1016/j.cobme.2021.100360] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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52
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Tumor-associated macrophages in cancer: recent advancements in cancer nanoimmunotherapies. J Exp Clin Cancer Res 2022; 41:68. [PMID: 35183252 PMCID: PMC8857848 DOI: 10.1186/s13046-022-02272-x] [Citation(s) in RCA: 142] [Impact Index Per Article: 71.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 01/22/2022] [Indexed: 12/21/2022] Open
Abstract
AbstractCancer immunotherapy has emerged as a novel cancer treatment, although recent immunotherapy trials have produced suboptimal outcomes, with durable responses seen only in a small number of patients. The tumor microenvironment (TME) has been shown to be responsible for tumor immune escape and therapy failure. The vital component of the TME is tumor-associated macrophages (TAMs), which are usually associated with poor prognosis and drug resistance, including immunotherapies, and have emerged as promising targets for cancer immunotherapy. Recently, nanoparticles, because of their unique physicochemical characteristics, have emerged as crucial translational moieties in tackling tumor-promoting TAMs that amplify immune responses and sensitize tumors to immunotherapies in a safe and effective manner. In this review, we mainly described the current potential nanomaterial-based therapeutic strategies that target TAMs, including restricting TAMs survival, inhibiting TAMs recruitment to tumors and functionally repolarizing tumor-supportive TAMs to antitumor type. The current understanding of the origin and polarization of TAMs, their crucial role in cancer progression and prognostic significance was also discussed in this review. We also highlighted the recent evolution of chimeric antigen receptor (CAR)-macrophage cell therapy.
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Macrophages as a Therapeutic Target in Metastatic Prostate Cancer: A Way to Overcome Immunotherapy Resistance? Cancers (Basel) 2022; 14:cancers14020440. [PMID: 35053602 PMCID: PMC8773572 DOI: 10.3390/cancers14020440] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/13/2022] [Accepted: 01/15/2022] [Indexed: 02/07/2023] Open
Abstract
Prostate cancer (PC) is the most common malignancy and the fifth cause of cancer death in men. The treatment for localized or locally advanced stages offers a high probability of cure. Even though the therapeutic landscape has significantly improved over the last decade, metastatic PC (mPC) still has a poor prognosis mainly due to the development of therapy resistance. In this context, the use of immunotherapy alone or in combination with other drugs has been explored in recent years. However, T-cell directed immune checkpoint inhibitors (ICIs) have shown limited activity with inconclusive results in mPC patients, most likely due to the highly immunosuppressive PC tumor microenvironment (TME). In this scenario, targeting macrophages, a highly abundant immunosuppressive cell type in the TME, could offer a new therapeutic strategy to improve immunotherapy efficacy. In this review, we summarize the growing field of macrophage-directed immunotherapies and discuss how these could be applied in the treatment of mPC, focusing on their combination with ICIs.
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Scott J, Rees L, Gallimore A, Lauder SN. PI3K Isoform Immunotherapy for Solid Tumours. Curr Top Microbiol Immunol 2022; 436:369-392. [PMID: 36243853 DOI: 10.1007/978-3-031-06566-8_16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Improving the anti-tumour T cell response as a consequence of immunotherapy can result in eradication of tumour burden, however, the majority of patients fail with current treatment regimens and so novel immunotherapies with greater efficacy and improved tolerability are needed. The phosphoinositide-3-kinase (PI3K) family members that are directly involved in cell signalling comprise PI3Kα, PI3Kβ, PI3Kδ and PI3Kγ, with the latter two isoforms expressed primarily by leukocytes. The survival and optimal function of regulatory T cells (Treg) and myeloid-derived suppressor cells (MDSCs) is dependent on PI3Kδ, whereas tumour-associated macrophages (TAMs), use PI3Kγ. Blocking these signalling isoforms can boost development of effective anti-cancer immune responses and result in control of tumour burden. The dependence on different PI3K isoforms in immune cells makes targeting this pathway an attractive approach for tumour immunotherapy. Herein, we discuss how inhibiting specific PI3K isoforms in pro-tumoural Tregs, MDSCS and TAMs can unleash a powerful anti-tumour immune response, driven by CD8+ T cells, capable of controlling tumour burden and consider how the immune response to therapy needs careful investigation, to identify both the correlates of successful treatment and those that impede the generation of robust anti-tumour responses. Furthermore, we review how combination immunotherapy approaches with both PI3K inhibitors and subsequent immune checkpoint blockade can potentiate the efficacy of monotherapy. Finally, we discuss the recent advances in the use of PI3K isoform-specific inhibitors as an immunotherapy for solid tumours in clinical trials.
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Affiliation(s)
- Jake Scott
- Division of Infection and Immunity, Cardiff University School of Medicine, SIURI, Cardiff, C14 4XN, UK
| | - Lauren Rees
- Division of Infection and Immunity, Cardiff University School of Medicine, SIURI, Cardiff, C14 4XN, UK
| | - Awen Gallimore
- Division of Infection and Immunity, Cardiff University School of Medicine, SIURI, Cardiff, C14 4XN, UK
| | - Sarah N Lauder
- Division of Infection and Immunity, Cardiff University School of Medicine, SIURI, Cardiff, C14 4XN, UK.
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55
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Barca C, Foray C, Hermann S, Herrlinger U, Remory I, Laoui D, Schäfers M, Grauer OM, Zinnhardt B, Jacobs AH. The Colony Stimulating Factor-1 Receptor (CSF-1R)-Mediated Regulation of Microglia/Macrophages as a Target for Neurological Disorders (Glioma, Stroke). Front Immunol 2021; 12:787307. [PMID: 34950148 PMCID: PMC8688767 DOI: 10.3389/fimmu.2021.787307] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 11/17/2021] [Indexed: 12/11/2022] Open
Abstract
Immunomodulatory therapies have fueled interest in targeting microglial cells as part of the innate immune response after infection or injury. In this context, the colony-stimulating factor 1 (CSF-1) and its receptor (CSF-1R) have gained attention in various neurological conditions to deplete and reprogram the microglia/macrophages compartment. Published data in physiological conditions support the use of small-molecule inhibitors to study microglia/macrophages dynamics under inflammatory conditions and as a therapeutic strategy in pathologies where those cells support disease progression. However, preclinical and clinical data highlighted that the complexity of the spatiotemporal inflammatory response could limit their efficiency due to compensatory mechanisms, ultimately leading to therapy resistance. We review the current state-of-art in the field of CSF-1R inhibition in glioma and stroke and provide an overview of the fundamentals, ongoing research, potential developments of this promising therapeutic strategy and further application toward molecular imaging.
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Affiliation(s)
- Cristina Barca
- European Institute for Molecular Imaging (EIMI), University of Münster, Münster, Germany
| | - Claudia Foray
- European Institute for Molecular Imaging (EIMI), University of Münster, Münster, Germany
| | - Sven Hermann
- European Institute for Molecular Imaging (EIMI), University of Münster, Münster, Germany
| | - Ulrich Herrlinger
- Division of Clinical Neuro-Oncology, Department of Neurology, University Hospital Bonn, Bonn, Germany.,Centre of Integrated Oncology, University Hospital Bonn, Bonn, Germany
| | - Isabel Remory
- In vivo Cellular and Molecular Imaging laboratory (ICMI), Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Damya Laoui
- Myeloid Cell Immunology Lab, VIB Center for Inflammation Research, Brussels, Belgium.,Lab of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Brussels, Belgium
| | - Michael Schäfers
- European Institute for Molecular Imaging (EIMI), University of Münster, Münster, Germany.,Department of Nuclear Medicine, University Hospital Münster, Münster, Germany
| | - Oliver M Grauer
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Münster, Germany
| | - Bastian Zinnhardt
- European Institute for Molecular Imaging (EIMI), University of Münster, Münster, Germany.,Biomarkers & Translational Technologies (BTT), Pharma Research & Early Development (pRED), F. Hoffmann-La Roche Ltd., Basel, Switzerland
| | - Andreas H Jacobs
- European Institute for Molecular Imaging (EIMI), University of Münster, Münster, Germany.,Centre of Integrated Oncology, University Hospital Bonn, Bonn, Germany.,Department of Geriatrics and Neurology, Johanniter Hospital, Bonn, Germany
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56
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Lee EY, Kim M, Choi BK, Kim DH, Choi I, You HJ. TJP1 Contributes to Tumor Progression through Supporting Cell-Cell Aggregation and Communicating with Tumor Microenvironment in Leiomyosarcoma. Mol Cells 2021; 44:784-794. [PMID: 34764231 PMCID: PMC8627839 DOI: 10.14348/molcells.2021.0130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 09/01/2021] [Accepted: 09/14/2021] [Indexed: 12/22/2022] Open
Abstract
Leiomyosarcoma (LMS) is a mesenchymal malignancy with a complex karyotype. Despite accumulated evidence, the factors contributing to the development of LMS are unclear. Here, we investigated the role of tight-junction protein 1 (TJP1), a membrane-associated intercellular barrier protein during the development of LMS and the tumor microenvironment. We orthotopically transplanted SK-LMS-1 cells and their derivatives in terms of TJP1 expression by intramuscular injection, such as SK-LMS-1 Sh-Control cells and SK-LMS-1 Sh-TJP1. We observed robust tumor growth in mice transplanted with LMS cell lines expressing TJP1 while no tumor mass was found in mice transplanted with SK-LMS-1 Sh-TJP1 cells with silenced TJP1 expression. Tissues from mice were stained and further analyzed to clarify the effects of TJP1 expression on tumor development and the tumor microenvironment. To identify the TJP1-dependent factors important in the development of LMS, genes with altered expression were selected in SK-LMS-1 cells such as cyclinD1, CSF1 and so on. The top 10% of highly expressed genes in LMS tissues were obtained from public databases. Further analysis revealed two clusters related to cell proliferation and the tumor microenvironment. Furthermore, integrated analyses of the gene expression networks revealed correlations among TJP1, CSF1 and CTLA4 at the mRNA level, suggesting a possible role for TJP1 in the immune environment. Taken together, these results imply that TJP1 contributes to the development of sarcoma by proliferation through modulating cell-cell aggregation and communication through cytokines in the tumor microenvironment and might be a beneficial therapeutic target.
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Affiliation(s)
- Eun-Young Lee
- Division of Translational Science, Research Institute, National Cancer Center, Goyang 10408, Korea
- Department of Medical Biotechnology, Yeungnam University, Gyeongsan 38541, Korea
| | - Minjeong Kim
- Division of Translational Science, Research Institute, National Cancer Center, Goyang 10408, Korea
| | - Beom K. Choi
- Biomedicine Production Branch, Research Institute, National Cancer Center, Goyang 10408, Korea
| | - Dae Hong Kim
- Division of Convergence Technology, Research Institute, National Cancer Center, Goyang 10408, Korea
| | - Inho Choi
- Department of Medical Biotechnology, Yeungnam University, Gyeongsan 38541, Korea
| | - Hye Jin You
- Division of Translational Science, Research Institute, National Cancer Center, Goyang 10408, Korea
- Department of Cancer Biomedical Science, National Cancer Center-Graduate School of Cancer Science and Policy (NCC-GCSP), National Cancer Center, Goyang 10408, Korea
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57
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Vanhaesebroeck B, Perry MWD, Brown JR, André F, Okkenhaug K. PI3K inhibitors are finally coming of age. Nat Rev Drug Discov 2021; 20:741-769. [PMID: 34127844 PMCID: PMC9297732 DOI: 10.1038/s41573-021-00209-1] [Citation(s) in RCA: 216] [Impact Index Per Article: 72.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/08/2021] [Indexed: 01/08/2023]
Abstract
Overactive phosphoinositide 3-kinase (PI3K) in cancer and immune dysregulation has spurred extensive efforts to develop therapeutic PI3K inhibitors. Although progress has been hampered by issues such as poor drug tolerance and drug resistance, several PI3K inhibitors have now received regulatory approval - the PI3Kα isoform-selective inhibitor alpelisib for the treatment of breast cancer and inhibitors mainly aimed at the leukocyte-enriched PI3Kδ in B cell malignancies. In addition to targeting cancer cell-intrinsic PI3K activity, emerging evidence highlights the potential of PI3K inhibitors in cancer immunotherapy. This Review summarizes key discoveries that aid the clinical translation of PI3Kα and PI3Kδ inhibitors, highlighting lessons learnt and future opportunities.
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Affiliation(s)
| | - Matthew W D Perry
- Medicinal Chemistry, Research and Early Development, Respiratory & Immunology BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Jennifer R Brown
- CLL Center, Dana-Farber Cancer Institute, Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Fabrice André
- Institut Gustave Roussy, INSERM U981, Université Paris Saclay, Paris, France
| | - Klaus Okkenhaug
- Department of Pathology, University of Cambridge, Cambridge, UK
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58
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Whiteside SK, Grant FM, Gyori DS, Conti AG, Imianowski CJ, Kuo P, Nasrallah R, Sadiyah F, Lira SA, Tacke F, Eil RL, Burton OT, Dooley J, Liston A, Okkenhaug K, Yang J, Roychoudhuri R. CCR8 marks highly suppressive Treg cells within tumours but is dispensable for their accumulation and suppressive function. Immunol Suppl 2021; 163:512-520. [PMID: 33838058 PMCID: PMC8274197 DOI: 10.1111/imm.13337] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 03/12/2021] [Accepted: 03/26/2021] [Indexed: 02/02/2023]
Abstract
CD4+ regulatory T (Treg) cells, dependent upon the transcription factor Foxp3, contribute to tumour immunosuppression but are also required for immune homeostasis. There is interest in developing therapies that selectively target the immunosuppressive function of Treg cells within tumours without disrupting their systemic anti-inflammatory function. High levels of expression of chemokine (C-C motif) receptor 8 (CCR8) discriminate Treg cells within tumours from those found in systemic lymphoid tissues. It has recently been proposed that disruption of CCR8 function using blocking anti-CCR8 antibodies results in reduced accumulation of Treg cells within tumours and disruption of their immunosuppressive function. Here, using Ccr8-/- mice, we show that CCR8 function is not required for Treg cell accumulation or immunosuppression in the context of syngeneic MC38 colorectal adenocarcinoma and B16 melanoma tumours. We observed high levels of CCR8 expression on tumour-infiltrating Treg cells which were abolished in Ccr8-/- mice. High levels of CCR8 marked cells with high levels of suppressive function. However, whereas systemic ablation of Treg cells resulted in strikingly diminished tumour burden, growth of subcutaneously implanted tumours was unaffected by systemic CCR8 loss. Consistently, we observed minimal impact of systemic CCR8 ablation on the frequency, phenotype and function of tumour-infiltrating Treg cells and conventional T (Tconv) function. These findings suggest that CCR8 is not required for Treg cell accumulation and immunosuppressive function within tumours and that depletion of CCR8+ Treg cells rather than blockade of CCR8 function is a more promising avenue for selective immunotherapy.
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Affiliation(s)
- Sarah K. Whiteside
- Department of PathologyUniversity of CambridgeCambridgeUK,Immunology ProgrammeBabraham Research CampusBabraham InstituteCambridgeUK
| | - Francis M. Grant
- Immunology ProgrammeBabraham Research CampusBabraham InstituteCambridgeUK
| | - David S. Gyori
- Department of PhysiologySemmelweis UniversityBudapestHungary
| | | | - Charlotte J. Imianowski
- Department of PathologyUniversity of CambridgeCambridgeUK,Immunology ProgrammeBabraham Research CampusBabraham InstituteCambridgeUK
| | - Paula Kuo
- Department of PathologyUniversity of CambridgeCambridgeUK,Immunology ProgrammeBabraham Research CampusBabraham InstituteCambridgeUK
| | - Rabab Nasrallah
- Immunology ProgrammeBabraham Research CampusBabraham InstituteCambridgeUK
| | - Firas Sadiyah
- Department of PathologyUniversity of CambridgeCambridgeUK,Immunology ProgrammeBabraham Research CampusBabraham InstituteCambridgeUK
| | - Sergio A. Lira
- Mount Sinai School of MedicineImmunology InstituteNew YorkNYUSA
| | - Frank Tacke
- Department of Hepatology & GastroenterologyCampus Virchow‐Klinikum (CVK) and Campus Charité Mitte (CCM)Charité Universitätsmedizin BerlinBerlinGermany
| | - Robert L. Eil
- Department of SurgeryMemorial Sloan Kettering Cancer CenterNew YorkNYUSA
| | - Oliver T. Burton
- Immunology ProgrammeBabraham Research CampusBabraham InstituteCambridgeUK
| | - James Dooley
- Immunology ProgrammeBabraham Research CampusBabraham InstituteCambridgeUK
| | - Adrian Liston
- Immunology ProgrammeBabraham Research CampusBabraham InstituteCambridgeUK
| | | | - Jie Yang
- Department of PathologyUniversity of CambridgeCambridgeUK,Immunology ProgrammeBabraham Research CampusBabraham InstituteCambridgeUK
| | - Rahul Roychoudhuri
- Department of PathologyUniversity of CambridgeCambridgeUK,Immunology ProgrammeBabraham Research CampusBabraham InstituteCambridgeUK
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59
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Piatakova A, Polakova I, Smahelova J, Johari SD, Nunvar J, Smahel M. Distinct Responsiveness of Tumor-Associated Macrophages to Immunotherapy of Tumors with Different Mechanisms of Major Histocompatibility Complex Class I Downregulation. Cancers (Basel) 2021; 13:cancers13123057. [PMID: 34205330 PMCID: PMC8235485 DOI: 10.3390/cancers13123057] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 06/02/2021] [Accepted: 06/16/2021] [Indexed: 01/16/2023] Open
Abstract
Simple Summary Tumor-associated macrophages (TAMs) are one of the major cell subpopulations in the tumor microenvironment (TME) where they can either be pro-tumorigenic or contribute to an anti-tumor immunity. The TME and TAM phenotype were analyzed after combined immuno-therapy (IT) in tumor models characterized by distinct expression of major histocompatibility class I complex (MHC-I) molecules, i.e., tumors induced with TC-1 (MHC-I-proficient), TC-1/A9 (reversibly downregulated), and TC-1/dB2m (irreversibly downregulated) cells. We found out that combined IT highly activated immune reactions in the TME of TC-1 and TC-1/A9 tumors, but the TME of TC-1/dB2m tumors remained almost unchanged. Correspondingly, TAMs from TC-1/A9 tumors were able to destroy tumor cells in vitro, while TAMs isolated from TC-1/dB2m tumors showed profoundly decreased cytotoxicity. Hence, various capabilities of TAMs in tumors with distinct expression of MHC-I molecules should be considered when applying IT, particularly IT focused on TAMs. Abstract Tumor-associated macrophages (TAMs) plentifully infiltrate the tumor microenvironment (TME), but their role in anti-tumor immunity is controversial. Depending on the acquired polarization, they can either support tumor growth or participate in the elimination of neoplastic cells. In this study, we analyzed the TME by RNA-seq and flow cytometry and examined TAMs after ex vivo activation. Tumors with normal and either reversibly or irreversibly decreased expression of major histocompatibility complex class I (MHC-I) molecules were induced with TC-1, TC-1/A9, and TC-1/dB2m cells, respectively. We found that combined immunotherapy (IT), composed of DNA immunization and the CpG oligodeoxynucleotide (ODN) ODN1826, evoked immune reactions in the TME of TC-1- and TC-1/A9-induced tumors, while the TME of TC-1/dB2m tumors was mostly immunologically unresponsive. TAMs infiltrated both tumor types with MHC-I downregulation, but only TAMs from TC-1/A9 tumors acquired the M1 phenotype upon IT and were cytotoxic in in vitro assay. The anti-tumor effect of combined IT was markedly enhanced by a blockade of the colony-stimulating factor-1 receptor (CSF-1R), but only against TC-1/A9 tumors. Overall, TAMs from tumors with irreversible MHC-I downregulation were resistant to the stimulation of cytotoxic activity. These data suggest the dissimilarity of TAMs from different tumor types, which should be considered when utilizing TAMs in cancer IT.
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CSF1/CSF1R Axis Blockade Limits Mesothelioma and Enhances Efficiency of Anti-PDL1 Immunotherapy. Cancers (Basel) 2021; 13:cancers13112546. [PMID: 34067348 PMCID: PMC8196870 DOI: 10.3390/cancers13112546] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/14/2021] [Accepted: 05/18/2021] [Indexed: 12/17/2022] Open
Abstract
Simple Summary CSF1/CSF1R signaling mediates tumor-associated macrophages recruitment and M2 polarization. M2 TAMs are dominant immune populations infiltrating mesothelioma tumors. We evaluated the role of CSF1/CSF1R axis blockade in tumor-infiltrating immune subsets. We also examined the effect of combined anti-CSF1R and anti-PDL1 treatment in mesothelioma progression. We show that CSF1R inhibition impedes mesothelioma progression, abrogates infiltration of TAMs, facilitates an M1 anti-tumor phenotype and activates tumor dendritic and CD8+ T cells. We also show that this inhibitor was able to significantly improve the effectiveness of anti-PDL1 immunotherapy. Abstract Colony-Stimulating Factor 1 (CSF1)/Colony-Stimulating Factor Receptor 1 (CSF1R) signaling orchestrates tumor-associated macrophage (TAM) recruitment and polarization towards a pro-tumor M2 phenotype, the dominant phenotype of TAMs infiltrating mesothelioma tumors. We hypothesized that CSF1/CSF1R inhibition would halt mesothelioma growth by targeting immunosuppressive M2 macrophages and unleashing efficient T cell responses. We also hypothesized that CSF1/CSF1R blockade would enhance the efficacy of a PDL1 inhibitor which directly activates CD8+ cells. We tested a clinically relevant CSF1R inhibitor (BLZ945) in mesothelioma treatment using syngeneic murine models. We evaluated the role of CSF1/CSF1R axis blockade in tumor-infiltrating immune subsets. We examined the effect of combined anti-CSF1R and anti-PDL1 treatment in mesothelioma progression. CSF1R inhibition impedes mesothelioma progression, abrogates infiltration of TAMs, facilitates an M1 anti-tumor phenotype and activates tumor dendritic and CD8+ T cells. CSF1R inhibition triggers a compensatory PD-1/PDL1 upregulation in tumor and immune cells. Combined CSF1R inhibitor with an anti-PDL1 agent was more effective in retarding mesothelioma growth compared to each monotherapy. In experimental mesotheliomas, CSF1R inhibition abrogates tumor progression by limiting suppressive myeloid populations and enhancing CD8+ cell activation and acts synergistically with anti-PDL1.
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Ni Y, Zhou X, Yang J, Shi H, Li H, Zhao X, Ma X. The Role of Tumor-Stroma Interactions in Drug Resistance Within Tumor Microenvironment. Front Cell Dev Biol 2021; 9:637675. [PMID: 34095111 PMCID: PMC8173135 DOI: 10.3389/fcell.2021.637675] [Citation(s) in RCA: 72] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Accepted: 04/19/2021] [Indexed: 02/05/2023] Open
Abstract
Cancer cells resistance to various therapies remains to be a key challenge nowadays. For a long time, scientists focused on tumor cells themselves for the mechanisms of acquired drug resistance. However, recent evidence showed that tumor microenvironment (TME) is essential for regulating immune escape, drug resistance, progression and metastasis of malignant cells. Reciprocal interactions between cancer cells and non-malignant cells within this milieu often reshape the TME and promote drug resistance. Therefore, advanced knowledge about these sophisticated interactions is significant for the design of effective therapeutic approaches. In this review, we highlight cancer-associated fibroblasts (CAFs), tumor-associated macrophages (TAMs), tumor-associated neutrophils (TANs), myeloid-derived suppressor cells (MDSCs), T-regulatory lymphocytes (Tregs), mesenchymal stem cells (MSCs), cancer-associated adipocytes (CAAs), and tumor endothelial cells (TECs) existing in TME, as well as their multiple cross-talk with tumor cells, which eventually endows tumor cells with therapeutic resistance.
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Affiliation(s)
- Yanghong Ni
- Department of Biotherapy, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu, China.,Department of Gynecology and Obstetrics, Development and Related Disease of Women and Children Key Laboratory of Sichuan Province, Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, West China Second Hospital, Sichuan University, Chengdu, China
| | - Xiaoting Zhou
- Department of Biotherapy, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu, China.,Department of Gynecology and Obstetrics, Development and Related Disease of Women and Children Key Laboratory of Sichuan Province, Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, West China Second Hospital, Sichuan University, Chengdu, China
| | - Jia Yang
- Department of Biotherapy, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu, China.,Department of Gynecology and Obstetrics, Development and Related Disease of Women and Children Key Laboratory of Sichuan Province, Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, West China Second Hospital, Sichuan University, Chengdu, China
| | - Houhui Shi
- Department of Biotherapy, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu, China.,Department of Gynecology and Obstetrics, Development and Related Disease of Women and Children Key Laboratory of Sichuan Province, Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, West China Second Hospital, Sichuan University, Chengdu, China
| | - Hongyi Li
- Department of Biotherapy, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu, China.,Department of Gynecology and Obstetrics, Development and Related Disease of Women and Children Key Laboratory of Sichuan Province, Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, West China Second Hospital, Sichuan University, Chengdu, China
| | - Xia Zhao
- Department of Gynecology and Obstetrics, Development and Related Disease of Women and Children Key Laboratory of Sichuan Province, Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, West China Second Hospital, Sichuan University, Chengdu, China
| | - Xuelei Ma
- Department of Biotherapy, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu, China
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Yeung J, Yaghoobi V, Miyagishima D, Vesely MD, Zhang T, Badri T, Nassar A, Han X, Sanmamed MF, Youngblood M, Peyre M, Kalamarides M, Rimm DL, Gunel M, Chen L. Targeting the CSF1/CSF1R Axis is a Potential Treatment Strategy for Malignant Meningiomas. Neuro Oncol 2021; 23:1922-1935. [PMID: 33914067 DOI: 10.1093/neuonc/noab075] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Malignant meningiomas are fatal and lack effective therapy. As M2 macrophages are the most prevalent immune cell type in human meningiomas, we hypothesized that normalizing this immunosuppressive population would be an effective treatment strategy. METHODS We used CIBERSORTX to examine the proportions of 22 immune subsets in human meningiomas. We targeted the colony stimulating factor 1 (CSF1) or CSF1 receptor (CSF1R) axis, an important regulator of macrophage phenotype, using monoclonal antibodies (mAbs) in a novel immunocompetent murine model (MGS1) for malignant meningioma. RNA-seq was performed to identify changes in gene expression in the tumor microenvironment. Mass cytometry was used to delineate changes in immune subsets after treatment. We measured patients' plasma CSF1 levels using ELISA and CSF1R expression using multiplex quantitative immunofluorescence in a human meningioma tissue microarray. RESULTS Human meningiomas are heavily enriched for immunosuppressive myeloid cells. MGS1 recapitulates the tumor microenvironment of human meningiomas, including an abundance of myeloid cells, a paucity of infiltrating T cells, and low programmed-death ligand 1 (PD-L1) expression. Treatment of murine meningiomas with anti-CSF1/CSF1R, but not programmed cell death receptor 1 (PD-1), mAbs abrogate tumor growth. RNA-seq and mass cytometry analyses reveal a myeloid cell reprogramming with limited effect on T cells in the tumor microenvironment. CSF1 plasma levels are significantly elevated in human patients and CSF1R is highly expressed on CD163 + macrophages within the human tumor microenvironment. CONCLUSION Our findings suggests that anti-CSF1/CSF1R antibody treatment may be an effective normalization cancer immunotherapy for malignant meningiomas.
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Affiliation(s)
- Jacky Yeung
- Department of Neurological Surgery, Yale University School of Medicine, New Haven, CT, USA
| | - Vesal Yaghoobi
- Department of Pathology, Yale University School of Medicine, New Haven, CT, USA
| | - Danielle Miyagishima
- Department of Neurological Surgery, Yale University School of Medicine, New Haven, CT, USA
| | - Matthew D Vesely
- Department of Dermatology, Yale University School of Medicine, New Haven, CT, USA.,Department of Immunobiology, Yale University School of Medicine, New Haven, CT, USA
| | - Tianxiang Zhang
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT, USA
| | - Ti Badri
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT, USA
| | - Ala Nassar
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT, USA
| | - Xue Han
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT, USA
| | - Miguel F Sanmamed
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT, USA.,Program of Immunology and Immunotherapy, Center for Applied Medical Research, University of Navarra, Pamplona, Spain
| | - Mark Youngblood
- Department of Neurosurgery, Northwestern University School of Medicine, Chicago, IL, USA
| | - Matthieu Peyre
- Neurosurgery Department, AP-HP Pitié-Salpêtrière University Hospital, Paris, France
| | - Michel Kalamarides
- Neurosurgery Department, AP-HP Pitié-Salpêtrière University Hospital, Paris, France
| | - David L Rimm
- Department of Pathology, Yale University School of Medicine, New Haven, CT, USA
| | - Murat Gunel
- Department of Neurological Surgery, Yale University School of Medicine, New Haven, CT, USA
| | - Lieping Chen
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT, USA
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Xiang X, Wang J, Lu D, Xu X. Targeting tumor-associated macrophages to synergize tumor immunotherapy. Signal Transduct Target Ther 2021; 6:75. [PMID: 33619259 PMCID: PMC7900181 DOI: 10.1038/s41392-021-00484-9] [Citation(s) in RCA: 365] [Impact Index Per Article: 121.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 07/30/2020] [Accepted: 10/15/2020] [Indexed: 02/08/2023] Open
Abstract
The current treatment strategies in advanced malignancies remain limited. Notably, immunotherapies have raised hope for a successful control of these advanced diseases, but their therapeutic responses are suboptimal and vary considerably among individuals. Tumor-associated macrophages (TAMs) are a major component of the tumor microenvironment (TME) and are often correlated with poor prognosis and therapy resistance, including immunotherapies. Thus, a deeper understanding of the complex roles of TAMs in immunotherapy regulation could provide new insight into the TME. Furthermore, targeting of TAMs is an emerging field of interest due to the hope that these strategies will synergize with current immunotherapies. In this review, we summarize recent studies investigating the involvement of TAMs in immune checkpoint inhibition, tumor vaccines and adoptive cell transfer therapies, and discuss the therapeutic potential of targeting TAMs as an adjuvant therapy in tumor immunotherapies.
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Affiliation(s)
- Xiaonan Xiang
- Department of Hepatobiliary and Pancreatic Surgery, Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
- NHC Key Laboratory of Combined Multi-organ Transplantation, Key Laboratory of the Diagnosis and Treatment of Organ Transplantation, CAMS, Hangzhou, China
| | - Jianguo Wang
- Department of Hepatobiliary and Pancreatic Surgery, Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
- NHC Key Laboratory of Combined Multi-organ Transplantation, Key Laboratory of the Diagnosis and Treatment of Organ Transplantation, CAMS, Hangzhou, China
| | - Di Lu
- Department of Hepatobiliary and Pancreatic Surgery, Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
- NHC Key Laboratory of Combined Multi-organ Transplantation, Key Laboratory of the Diagnosis and Treatment of Organ Transplantation, CAMS, Hangzhou, China
| | - Xiao Xu
- Department of Hepatobiliary and Pancreatic Surgery, Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China.
- NHC Key Laboratory of Combined Multi-organ Transplantation, Key Laboratory of the Diagnosis and Treatment of Organ Transplantation, CAMS, Hangzhou, China.
- Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
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64
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Dowlati A, Harvey RD, Carvajal RD, Hamid O, Klempner SJ, Kauh JSW, Peterson DA, Yu D, Chapman SC, Szpurka AM, Carlsen M, Quinlan T, Wesolowski R. LY3022855, an anti-colony stimulating factor-1 receptor (CSF-1R) monoclonal antibody, in patients with advanced solid tumors refractory to standard therapy: phase 1 dose-escalation trial. Invest New Drugs 2021; 39:1057-1071. [PMID: 33624233 DOI: 10.1007/s10637-021-01084-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Accepted: 02/10/2021] [Indexed: 11/24/2022]
Abstract
Background Tumor-associated macrophages (TAMs) promote tumor growth, metastasis, and therapeutic resistance via colony-stimulating factor-1 (CSF-1), acting through CSF-1 receptor (CSF-1R) signaling. This phase 1 study determined the safety, tolerability, pharmacokinetics-pharmacodynamics, immunogenicity, and efficacy of the anti-CSF-1R antibody LY3022855 in solid tumors. Methods Patients with advanced solid tumors refractory to standard therapy were enrolled and treated in 2 dosing cohorts: weight-based (part A) and non-weight-based (part B). Part A patients were assigned to intravenous (IV) dose-escalation cohorts: 2.5 mg/kg once per week (QW), 0.3 mg/kg QW, 0.6 mg/kg QW, 1.25 mg/kg once every 2 weeks (Q2W) and 1.25 mg/kg QW doses of LY3022855. Non-weight-based doses in part B were 100 mg and 150 mg IV QW. Results Fifty-two patients (mean age 58.6 ± 10.4 years) were treated with ≥1 dose of LY3022855 (range: 4-6). Five dose-limiting toxicities (left ventricular dysfunction, anemia, pancreatitis, rhabdomyolysis, and acute kidney injury) occurred in 4 patients. The non-weight-based 100 mg QW dose was established as the RP2D. The most common treatment-emergent adverse events were increase in liver function variables, fatigue, nausea, vomiting, diarrhea, anorexia, pyrexia, increased lipase, amylase, and lactate dehydrogenase. Clearance decreased with increasing dose and weight-based dosing had minimal effect on pharmacokinetics. Serum CSF-1, and IL-34 levels increased at higher doses and more frequent dosing, whereas TAMs and CD14dimCD16bright levels decreased. Three patients achieved stable disease. No responses were seen. Conclusions LY3022855 was well tolerated and showed dose-dependent pharmacokinetics-pharmacodynamics and limited clinical activity in a heterogenous solid tumor population. ClinicalTrials.gov ID NCT01346358 (Registration Date: May 3, 2011).
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Affiliation(s)
- Afshin Dowlati
- Department of Medicine Division of Hematology and Oncology, University Hospitals Seidman Cancer Center and Case Western Reserve University, Cleveland, OH, USA
| | - R Donald Harvey
- Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, GA, USA
| | - Richard D Carvajal
- Department of Medicine, Division of Hematology/Oncology, Columbia University, College of Physicians and Surgeons New York, New York, NY, USA
| | - Omid Hamid
- Department of Hematology/Oncology, The Angeles Clinic and Research Institute, Cedars-Sinai Affiliate, Los Angeles, CA, USA
| | - Samuel J Klempner
- Department of Medicine and Oncology, Massachusetts General Hospital, Boston, MA, USA
| | | | | | - Danni Yu
- Eli Lilly and Company, Indianapolis, IN, USA
| | | | | | | | | | - Robert Wesolowski
- Internal Medicine, Division of Medical Oncology, The Ohio State University Comprehensive Cancer Center, 1310D Lincoln Tower, 1800 Cannon Drive, Columbus, OH, 43210, USA.
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Immune Therapy Resistance and Immune Escape of Tumors. Cancers (Basel) 2021; 13:cancers13030551. [PMID: 33535559 PMCID: PMC7867077 DOI: 10.3390/cancers13030551] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 01/28/2021] [Indexed: 01/05/2023] Open
Abstract
Simple Summary The genetic adaptability of malignant cells and their consequent heterogeneity even within the same patient poses a great obstacle to cancer patient treatment. This review summarizes the data obtained in the last decade on different preclinical mice models as well as on various immunotherapeutic clinical trials in distinct solid and hematopoietic cancers on how the immune system can be implemented in tumor therapy. Moreover, the different intrinsic and extrinsic escape strategies utilized by the tumor to avoid elimination by the immune system are recapitulated together with the different approaches proposed to overcome them in order to succeed and/or to enhance therapy efficacy. Abstract Immune therapy approaches such as checkpoint inhibitors or adoptive cell therapy represent promising therapeutic options for cancer patients, but their efficacy is still limited, since patients frequently develop innate or acquired resistances to these therapies. Thus, one major goal is to increase the efficiency of immunotherapies by overcoming tumor-induced immune suppression, which then allows for immune-mediated tumor clearance. Innate resistance to immunotherapies could be caused by a low immunogenicity of the tumor itself as well as an immune suppressive microenvironment composed of cellular, physical, or soluble factors leading to escape from immune surveillance and disease progression. So far, a number of strategies causing resistance to immunotherapy have been described in various clinical trials, which broadly overlap with the immunoediting processes of cancers. This review summarizes the novel insights in the development of resistances to immune therapy as well as different approaches that could be employed to overcome them.
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66
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Choi YW, Kim YH, Oh SY, Suh KW, Kim Y, Lee G, Yoon JE, Park SS, Lee Y, Park YJ, Kim HS, Park SH, Kim J, Park TJ. Senescent Tumor Cells Build a Cytokine Shield in Colorectal Cancer. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:2002497. [PMID: 33643790 PMCID: PMC7887594 DOI: 10.1002/advs.202002497] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 10/09/2020] [Indexed: 05/25/2023]
Abstract
Cellular senescence can either support or inhibit cancer progression. Here, it is shown that intratumoral infiltration of CD8+ T cells is negatively associated with the proportion of senescent tumor cells in colorectal cancer (CRC). Gene expression analysis reveals increased expression of C-X-C motif chemokine ligand 12 (CXCL12) and colony stimulating factor 1 (CSF1) in senescent tumor cells. Senescent tumor cells inhibit CD8+ T cell infiltration by secreting a high concentration of CXCL12, which induces a loss of CXCR4 in T cells that result in impaired directional migration. CSF1 from senescent tumor cells enhance monocyte differentiation into M2 macrophages, which inhibit CD8+ T cell activation. Neutralization of CXCL12/CSF1 increases the effect of anti-PD1 antibody in allograft tumors. Furthermore, inhibition of CXCL12 from senescent tumor cells enhances T cell infiltration and results in reducing the number and size of tumors in azoxymethane (AOM)/dextran sulfate sodium (DSS)-induced CRC. These findings suggest senescent tumor cells generate a cytokine barrier protecting nonsenescent tumor cells from immune attack and provide a new target for overcoming the immunotherapy resistance of CRC.
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Affiliation(s)
- Yong Won Choi
- Department of Biochemistry and Molecular BiologyAjou University School of MedicineSuwon16499Korea
- Department of Hematology–OncologyAjou University School of MedicineSuwon16499Korea
- Inflamm‐Aging Translational Research CenterAjou University Medical CenterSuwon16499Korea
| | - Young Hwa Kim
- Department of Biochemistry and Molecular BiologyAjou University School of MedicineSuwon16499Korea
- Department of Biomedical SciencesAjou University Graduate School of MedicineSuwon16499Korea
| | - Seung Yeop Oh
- Department of SurgeryAjou University School of MedicineSuwon16499Korea
| | - Kwang Wook Suh
- Department of SurgeryAjou University School of MedicineSuwon16499Korea
| | - Young‐Sam Kim
- Department of Biochemistry and Molecular BiologyAjou University School of MedicineSuwon16499Korea
- Department of Biomedical SciencesAjou University Graduate School of MedicineSuwon16499Korea
| | - Ga‐Yeon Lee
- Department of Biochemistry and Molecular BiologyAjou University School of MedicineSuwon16499Korea
- Department of Biomedical SciencesAjou University Graduate School of MedicineSuwon16499Korea
| | - Jung Eun Yoon
- Department of Biochemistry and Molecular BiologyAjou University School of MedicineSuwon16499Korea
- Department of Biomedical SciencesAjou University Graduate School of MedicineSuwon16499Korea
| | - Soon Sang Park
- Department of Biochemistry and Molecular BiologyAjou University School of MedicineSuwon16499Korea
- Department of Biomedical SciencesAjou University Graduate School of MedicineSuwon16499Korea
| | - Young‐Kyoung Lee
- Department of Biochemistry and Molecular BiologyAjou University School of MedicineSuwon16499Korea
- Inflamm‐Aging Translational Research CenterAjou University Medical CenterSuwon16499Korea
- Department of Biomedical SciencesAjou University Graduate School of MedicineSuwon16499Korea
| | - Yoo Jung Park
- Department of Hematology–OncologyAjou University School of MedicineSuwon16499Korea
| | - Hong Seok Kim
- Department of Molecular MedicineInha University School of MedicineIncheon22212Korea
| | - So Hyun Park
- Department of PathologyAjou University School of MedicineSuwon16499Korea
| | - Jang‐Hee Kim
- Inflamm‐Aging Translational Research CenterAjou University Medical CenterSuwon16499Korea
- Department of PathologyAjou University School of MedicineSuwon16499Korea
| | - Tae Jun Park
- Department of Biochemistry and Molecular BiologyAjou University School of MedicineSuwon16499Korea
- Inflamm‐Aging Translational Research CenterAjou University Medical CenterSuwon16499Korea
- Department of Biomedical SciencesAjou University Graduate School of MedicineSuwon16499Korea
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Activity of tumor-associated macrophage depletion by CSF1R blockade is highly dependent on the tumor model and timing of treatment. Cancer Immunol Immunother 2021; 70:2401-2410. [PMID: 33511454 PMCID: PMC8289806 DOI: 10.1007/s00262-021-02861-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 01/11/2021] [Indexed: 12/29/2022]
Abstract
Tumor-associated macrophages (TAMs) are abundant in solid tumors where they exhibit immunosuppressive and pro-tumorigenic functions. Inhibition of TAM proliferation and survival through CSF1R blockade has been widely explored as a cancer immunotherapy. To further define mechanisms regulating CSF1R-targeted therapies, we systematically evaluated the effect of anti-CSF1R treatment on tumor growth and tumor microenvironment (TME) inflammation across multiple murine models. Despite substantial macrophage depletion, anti-CSF1R had minimal effects on the anti-tumor immune response in mice bearing established tumors. In contrast, anti-CSF1R treatment concurrent with tumor implantation resulted in more robust tumor growth inhibition and evidence of enhanced anti-tumor immunity. Our findings suggest only minor contributions of CSF1R-dependent TAMs to the inflammatory state of the TME in established tumors, that immune landscape heterogeneity across different tumor models can influence anti-CSF1R activity, and that alternative treatment schedules and/or TAM depletion strategies may be needed to maximize the clinical benefit of this approach.
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Zang Y, Dong Q, Lu Y, Dong K, Wang R, Liang Z. Lumican inhibits immune escape and carcinogenic pathways in colorectal adenocarcinoma. Aging (Albany NY) 2021; 13:4388-4408. [PMID: 33493133 PMCID: PMC7906189 DOI: 10.18632/aging.202401] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 11/23/2020] [Indexed: 12/18/2022]
Abstract
Lumican (LUM), a small leucine-rich proteoglycan, is a component of the extracellular matrix. Abnormal LUM expression is potentially associated with cancer progression. In the present study, we confirmed high LUM mRNA expression in colorectal adenocarcinoma (COAD) through the UALCAN database. The Kaplan-Meier method, univariate, and multivariate COX analysis showed that high LUM expression is an independent determinant of poor prognosis in COAD. A COX regression model was constructed based on clinical information and LUM expression. The receiver operating characteristic (ROC) curve indicated that this model was highly accurate in monitoring COAD prognosis. The co-expression network of LUM was determined by LinkedOmics, which showed that LUM expression was closely related to immune escape and the miR200 family. Furthermore, we studied the co-expression network of LUM and found that LUM could promote tumor metastasis and invasion. The Tumor Immune Estimation Resource website showed that LUM was closely related to immune infiltration and correlated with regulatory T cells, tumour-associated macrophages, and dendritic cells. We found that LUM cultivated cancer progression by targeting the miR200 family to promote epithelial-to-mesenchymal transition. These findings suggest that LUM is a potential target for inhibiting immune escape and carcinogenic pathways.
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Affiliation(s)
- Yiqing Zang
- Department of Otorhinolaryngology, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Qiuping Dong
- Department of Cancer Cell Biology, Tianjin's Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - Yi Lu
- Department of Otorhinolaryngology, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Kaiti Dong
- Department of Otorhinolaryngology, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Rong Wang
- Department of Laboratory Medicine, Tianjin Medical University, Tianjin 300060, China
| | - Zheng Liang
- Department of Otorhinolaryngology, Tianjin Medical University General Hospital, Tianjin 300052, China
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CSF1R inhibition depletes tumor-associated macrophages and attenuates tumor progression in a mouse sonic Hedgehog-Medulloblastoma model. Oncogene 2021; 40:396-407. [PMID: 33159168 PMCID: PMC7855734 DOI: 10.1038/s41388-020-01536-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 10/14/2020] [Accepted: 10/21/2020] [Indexed: 12/31/2022]
Abstract
The immune microenvironment of tumors can play a critical role in promoting or inhibiting tumor progression depending on the context. We present evidence that tumor-associated macrophages/microglia (TAMs) can promote tumor progression in the sonic hedgehog subgroup of medulloblastoma (SHH-MB). By combining longitudinal manganese-enhanced magnetic resonance imaging (MEMRI) and immune profiling of a sporadic mouse model of SHH-MB, we found the density of TAMs is higher in the ~50% of tumors that progress to lethal disease. Furthermore, reducing regulatory T cells or eliminating B and T cells in Rag1 mutants does not alter SHH-MB tumor progression. As TAMs are a dominant immune component in tumors and are normally dependent on colony-stimulating factor 1 receptor (CSF1R), we treated mice with a CSF1R inhibitor, PLX5622. Significantly, PLX5622 reduces a subset of TAMs, prolongs mouse survival, and reduces the volume of most tumors within 4 weeks of treatment. Moreover, concomitant with a reduction in TAMs the percentage of infiltrating cytotoxic T cells is increased, indicating a change in the tumor environment. Our studies in an immunocompetent preclinical mouse model demonstrate TAMs can have a functional role in promoting SHH-MB progression. Thus, CSF1R inhibition could have therapeutic potential for a subset of SHH-MB patients.
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70
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Zhang L, Li Z, Skrzypczynska KM, Fang Q, Zhang W, O'Brien SA, He Y, Wang L, Zhang Q, Kim A, Gao R, Orf J, Wang T, Sawant D, Kang J, Bhatt D, Lu D, Li CM, Rapaport AS, Perez K, Ye Y, Wang S, Hu X, Ren X, Ouyang W, Shen Z, Egen JG, Zhang Z, Yu X. Single-Cell Analyses Inform Mechanisms of Myeloid-Targeted Therapies in Colon Cancer. Cell 2020; 181:442-459.e29. [PMID: 32302573 DOI: 10.1016/j.cell.2020.03.048] [Citation(s) in RCA: 704] [Impact Index Per Article: 176.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 01/02/2020] [Accepted: 03/20/2020] [Indexed: 12/15/2022]
Abstract
Single-cell RNA sequencing (scRNA-seq) is a powerful tool for defining cellular diversity in tumors, but its application toward dissecting mechanisms underlying immune-modulating therapies is scarce. We performed scRNA-seq analyses on immune and stromal populations from colorectal cancer patients, identifying specific macrophage and conventional dendritic cell (cDC) subsets as key mediators of cellular cross-talk in the tumor microenvironment. Defining comparable myeloid populations in mouse tumors enabled characterization of their response to myeloid-targeted immunotherapy. Treatment with anti-CSF1R preferentially depleted macrophages with an inflammatory signature but spared macrophage populations that in mouse and human expresses pro-angiogenic/tumorigenic genes. Treatment with a CD40 agonist antibody preferentially activated a cDC population and increased Bhlhe40+ Th1-like cells and CD8+ memory T cells. Our comprehensive analysis of key myeloid subsets in human and mouse identifies critical cellular interactions regulating tumor immunity and defines mechanisms underlying myeloid-targeted immunotherapies currently undergoing clinical testing.
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Affiliation(s)
- Lei Zhang
- Beijing Advanced Innovation Center for Genomics, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Ziyi Li
- BIOPIC and School of Life Sciences, Peking University, Beijing 100871, China
| | - Katarzyna M Skrzypczynska
- Department of Inflammation and Oncology and Genome Analysis Unit, Amgen Research, Amgen Inc., South San Francisco, CA 94080, USA
| | - Qiao Fang
- Beijing Advanced Innovation Center for Genomics, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Wei Zhang
- Department of Gastroenterological Surgery, Peking University People's Hospital, Beijing 100044, China
| | - Sarah A O'Brien
- Department of Inflammation and Oncology and Genome Analysis Unit, Amgen Research, Amgen Inc., South San Francisco, CA 94080, USA
| | - Yao He
- Beijing Advanced Innovation Center for Genomics, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Lynn Wang
- Department of Inflammation and Oncology and Genome Analysis Unit, Amgen Research, Amgen Inc., South San Francisco, CA 94080, USA
| | - Qiming Zhang
- BIOPIC and School of Life Sciences, Peking University, Beijing 100871, China
| | - Aeryon Kim
- Department of Inflammation and Oncology and Genome Analysis Unit, Amgen Research, Amgen Inc., South San Francisco, CA 94080, USA
| | - Ranran Gao
- BIOPIC and School of Life Sciences, Peking University, Beijing 100871, China
| | - Jessica Orf
- Department of Inflammation and Oncology and Genome Analysis Unit, Amgen Research, Amgen Inc., South San Francisco, CA 94080, USA
| | - Tao Wang
- BIOPIC and School of Life Sciences, Peking University, Beijing 100871, China
| | - Deepali Sawant
- Department of Inflammation and Oncology and Genome Analysis Unit, Amgen Research, Amgen Inc., South San Francisco, CA 94080, USA
| | - Jiajinlong Kang
- BIOPIC and School of Life Sciences, Peking University, Beijing 100871, China
| | - Dev Bhatt
- Department of Inflammation and Oncology and Genome Analysis Unit, Amgen Research, Amgen Inc., South San Francisco, CA 94080, USA
| | - Daniel Lu
- Department of Inflammation and Oncology and Genome Analysis Unit, Amgen Research, Amgen Inc., South San Francisco, CA 94080, USA
| | - Chi-Ming Li
- Department of Inflammation and Oncology and Genome Analysis Unit, Amgen Research, Amgen Inc., South San Francisco, CA 94080, USA
| | - Aaron S Rapaport
- Department of Inflammation and Oncology and Genome Analysis Unit, Amgen Research, Amgen Inc., South San Francisco, CA 94080, USA
| | - Kristy Perez
- Department of Inflammation and Oncology and Genome Analysis Unit, Amgen Research, Amgen Inc., South San Francisco, CA 94080, USA
| | - Yingjiang Ye
- Department of Gastroenterological Surgery, Peking University People's Hospital, Beijing 100044, China
| | - Shan Wang
- Department of Gastroenterological Surgery, Peking University People's Hospital, Beijing 100044, China
| | - Xueda Hu
- BIOPIC and School of Life Sciences, Peking University, Beijing 100871, China; Analytical Biosciences Limited, Beijing 100084, China
| | - Xianwen Ren
- BIOPIC and School of Life Sciences, Peking University, Beijing 100871, China
| | - Wenjun Ouyang
- Department of Inflammation and Oncology and Genome Analysis Unit, Amgen Research, Amgen Inc., South San Francisco, CA 94080, USA
| | - Zhanlong Shen
- Department of Gastroenterological Surgery, Peking University People's Hospital, Beijing 100044, China.
| | - Jackson G Egen
- Department of Inflammation and Oncology and Genome Analysis Unit, Amgen Research, Amgen Inc., South San Francisco, CA 94080, USA.
| | - Zemin Zhang
- Beijing Advanced Innovation Center for Genomics, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China; BIOPIC and School of Life Sciences, Peking University, Beijing 100871, China.
| | - Xin Yu
- Department of Inflammation and Oncology and Genome Analysis Unit, Amgen Research, Amgen Inc., South San Francisco, CA 94080, USA.
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Anderson NR, Minutolo NG, Gill S, Klichinsky M. Macrophage-Based Approaches for Cancer Immunotherapy. Cancer Res 2020; 81:1201-1208. [PMID: 33203697 DOI: 10.1158/0008-5472.can-20-2990] [Citation(s) in RCA: 335] [Impact Index Per Article: 83.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/27/2020] [Accepted: 11/12/2020] [Indexed: 11/16/2022]
Abstract
Adoptive cell therapy with genetically modified T cells has generated exciting outcomes in hematologic malignancies, but its application to solid tumors has proven challenging. This gap has spurred the investigation of alternative immune cells as therapeutics. Macrophages are potent immune effector cells whose functional plasticity leads to antitumor as well as protumor function in different settings, and this plasticity has led to notable efforts to deplete or repolarize tumor-associated macrophages. Alternatively, macrophages could be adoptively transferred after ex vivo genetic modification. In this review, we highlight the role of macrophages in solid tumors, the progress made with macrophage-focused immunotherapeutic modalities, and the emergence of chimeric antigen receptor macrophage cell therapy.
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Affiliation(s)
| | | | - Saar Gill
- Department of Hematology Oncology, Abramson Cancer Center, University of Pennsylvania, Philadelphia, Pennsylvania
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Hama N, Kobayashi T, Han N, Kitagawa F, Kajihara N, Otsuka R, Wada H, Lee HK, Rhee H, Hasegawa Y, Yagita H, Baghdadi M, Seino KI. Interleukin-34 Limits the Therapeutic Effects of Immune Checkpoint Blockade. iScience 2020; 23:101584. [PMID: 33205010 PMCID: PMC7648133 DOI: 10.1016/j.isci.2020.101584] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 08/04/2020] [Accepted: 09/16/2020] [Indexed: 01/06/2023] Open
Abstract
Interleukin-34 (IL-34) is an alternative ligand to colony-stimulating factor-1 (CSF-1) for the CSF-1 receptor that acts as a key regulator of monocyte/macrophage lineage. In this study, we show that tumor-derived IL-34 mediates resistance to immune checkpoint blockade regardless of CSF-1 existence in various murine cancer models. Consistent with its immunosuppressive characteristics, the expression of IL-34 in tumors correlates with decreased frequencies of cellular (such as CD8+ and CD4+ T cells and M1-biased macrophages) and molecular (including various cytokines and chemokines) effectors at the tumor microenvironment. Then, a neutralizing antibody against IL-34 improved the therapeutic effects of the immune checkpoint blockade in combinatorial therapeutic models, including a patient-derived xenograft model. Collectively, we revealed that tumor-derived IL-34 inhibits the efficacy of immune checkpoint blockade and proposed the utility of IL-34 blockade as a new strategy for cancer therapy.
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Affiliation(s)
- Naoki Hama
- Division of Immunobiology, Institute for Genetic Medicine, Hokkaido University, Kita-15 Nishi-7, Sapporo 060-0815, Japan
| | - Takuto Kobayashi
- Division of Immunobiology, Institute for Genetic Medicine, Hokkaido University, Kita-15 Nishi-7, Sapporo 060-0815, Japan
| | - Nanumi Han
- Division of Immunobiology, Institute for Genetic Medicine, Hokkaido University, Kita-15 Nishi-7, Sapporo 060-0815, Japan
| | - Fumihito Kitagawa
- Division of Immunobiology, Institute for Genetic Medicine, Hokkaido University, Kita-15 Nishi-7, Sapporo 060-0815, Japan
| | - Nabeel Kajihara
- Division of Immunobiology, Institute for Genetic Medicine, Hokkaido University, Kita-15 Nishi-7, Sapporo 060-0815, Japan
| | - Ryo Otsuka
- Division of Immunobiology, Institute for Genetic Medicine, Hokkaido University, Kita-15 Nishi-7, Sapporo 060-0815, Japan
| | - Haruka Wada
- Division of Immunobiology, Institute for Genetic Medicine, Hokkaido University, Kita-15 Nishi-7, Sapporo 060-0815, Japan
| | - Hee-kyung Lee
- DNA Link, Inc., Biomedical Science Building 117, Seoul National University College of Medicine, 103 Daehakro, Jongro-gu, Seoul 03080, South Korea
| | - Hwanseok Rhee
- DNA Link, Inc., Biomedical Science Building 117, Seoul National University College of Medicine, 103 Daehakro, Jongro-gu, Seoul 03080, South Korea
| | - Yoshinori Hasegawa
- Laboratory of Clinical Omics Research, Depertment of Applied Genomics, Kazusa DNA Research Institute, 2-6-7 Kazusa-kamatari, Kisarazu, Chiba 292-0818, Japan
| | - Hideo Yagita
- Department of Immunology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan
| | - Muhammad Baghdadi
- Division of Immunobiology, Institute for Genetic Medicine, Hokkaido University, Kita-15 Nishi-7, Sapporo 060-0815, Japan
| | - Ken-ichiro Seino
- Division of Immunobiology, Institute for Genetic Medicine, Hokkaido University, Kita-15 Nishi-7, Sapporo 060-0815, Japan
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Razak AR, Cleary JM, Moreno V, Boyer M, Calvo Aller E, Edenfield W, Tie J, Harvey RD, Rutten A, Shah MA, Olszanski AJ, Jäger D, Lakhani N, Ryan DP, Rasmussen E, Juan G, Wong H, Soman N, Smit MAD, Nagorsen D, Papadopoulos KP. Safety and efficacy of AMG 820, an anti-colony-stimulating factor 1 receptor antibody, in combination with pembrolizumab in adults with advanced solid tumors. J Immunother Cancer 2020; 8:jitc-2020-001006. [PMID: 33046621 PMCID: PMC7552843 DOI: 10.1136/jitc-2020-001006] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/30/2020] [Indexed: 12/11/2022] Open
Abstract
Background To determine the safety and efficacy of the anti-colony-stimulating factor 1 receptor (anti-CSF1R) monoclonal antibody AMG 820 in combination with pembrolizumab in patients with select solid tumors. Patients and methods Patients had advanced, refractory mismatch repair-proficient colorectal cancer, pancreatic cancer, or non-small cell lung cancer (NSCLC) with low (<50%) programmed cell death-ligand 1 (PD-L1) expression and were naïve to anti-programmed cell death-1 (PD-1)/PD-L1 or had relapsed/refractory NSCLC after anti-PD-1/PD-L1 treatment with low or high (≥50%) PD-L1 expression; all were anti-CSF1/CSF1R naïve. Patients received 1100 mg or 1400 mg AMG 820 plus 200 mg pembrolizumab intravenously every 3 weeks. The primary endpoints were incidence of dose-limiting toxicities (DLTs) and adverse events (AEs) and objective response rate per immune-related Response Evaluation Criteria in Solid Tumours at the recommended combination dose. Results Overall, 116 patients received ≥1 dose of AMG 820 plus pembrolizumab (18 at 1400 mg AMG 820; 98 at 1100 mg AMG 820). Most patients (64%) were male; the median age was 64 (range 30–86) years. Seven patients had DLTs (1 at 1400 mg AMG 820; 6 at 1100 mg AMG 820). Almost all patients (99.1%) had AEs, 87.9% with grade ≥3 AEs. The most common AEs were increased aspartate aminotransferase (59.5%), fatigue (48.3%), periorbital/face edema (48.3%), and rash/maculopapular rash (37.1%). The best response was immune-related partial response in 3 patients (3%; duration of response 9.2, 10.0, 12.5 months) and immune-related stable disease in 39 patients (34%). None of the completed phase II cohorts met the predefined threshold for efficacy. Post-treatment there was accumulation of serum colony-stimulating factor 1 (CSF1) and interleukin-34, reduction in CSF1-dependent CD16-expressing monocytes, and increased PD-L1 expression and CD4 and CD8 cell numbers in tumor biopsies. Conclusions The recommended combination dose of 1100 mg AMG 820 plus 200 mg pembrolizumab had an acceptable safety profile. Although pharmacodynamic effects were observed, antitumor activity was insufficient for further evaluation of this combination in selected patient populations. Trial registration number NCT02713529
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Affiliation(s)
- Albiruni Ra Razak
- Division of Medical Oncology and Hematology, University Health Network, Princess Margaret Cancer Centre, Toronto, Ontario, Canada
| | - James M Cleary
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | - Victor Moreno
- Early Phase Unit START Madrid-FJD, Servicio de Oncología Médica, Fundación Jiménez Díaz University Hospital, Madrid, Spain
| | - Michael Boyer
- Department of Medical Oncology, Chris O'Brien Lifehouse, Camperdown, New South Wales, Australia
| | - Emiliano Calvo Aller
- Early Phase Clinical Drug Development in Oncology, START Madrid - CIOCC, Centro Integral Oncológico Clara Campal, Madrid, Spain
| | - William Edenfield
- Prisma Health Institute for Translational Oncology Research, Greenville, South Carolina, USA
| | - Jeanne Tie
- Department of Medical Oncology, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | - R Donald Harvey
- Department of Hematology and Medical Oncology, Winship Cancer Institute of Emory University Hospital, Atlanta, Georgia, USA
| | - Annemie Rutten
- GasthuisZusters Antwerpen Sint-Augustinus, Antwerp, Belgium
| | - Manish A Shah
- Department of Medicine, Division of Hematology and Medical Oncology, Solid Tumor Service, Weill Cornell Medicine, New York, New York, USA
| | - Anthony J Olszanski
- Department of Hematology/Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
| | - Dirk Jäger
- Department of Medical Oncology, Nationales Centrum für Tumorerkrankungen Heidelberg, Heidelberg, Germany
| | - Nehal Lakhani
- Developmental Cancer Therapeutics, START Midwest, Grand Rapids, Missouri, USA
| | - David P Ryan
- Department Hematology/Oncology, Massachusetts General Hospital, Boston, Massachusetts, USA
| | | | | | - Hansen Wong
- Amgen Inc, South San Francisco, California, USA
| | | | | | | | - Kyriakos P Papadopoulos
- Clinical Research, South Texas Accelerated Research Therapeutics (START), San Antonio, Texas, USA
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74
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Lauder SN, Smart K, Kersemans V, Allen D, Scott J, Pires A, Milutinovic S, Somerville M, Smart S, Kinchesh P, Lopez-Guadamillas E, Hughes E, Jones E, Scurr M, Godkin A, Friedman LS, Vanhaesebroeck B, Gallimore A. Enhanced antitumor immunity through sequential targeting of PI3Kδ and LAG3. J Immunother Cancer 2020; 8:e000693. [PMID: 33093155 PMCID: PMC7583804 DOI: 10.1136/jitc-2020-000693] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/13/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Despite striking successes, immunotherapies aimed at increasing cancer-specific T cell responses are unsuccessful in most patients with cancer. Inactivating regulatory T cells (Treg) by inhibiting the PI3Kδ signaling enzyme has shown promise in preclinical models of tumor immunity and is currently being tested in early phase clinical trials in solid tumors. METHODS Mice bearing 4T1 mammary tumors were orally administered a PI3Kδ inhibitor (PI-3065) daily and tumor growth, survival and T cell infiltrate were analyzed in the tumor microenvironment. A second treatment schedule comprised PI3Kδ inhibitor with anti-LAG3 antibodies administered sequentially 10 days later. RESULTS As observed in human immunotherapy trials with other agents, immunomodulation by PI3Kδ-blockade led to 4T1 tumor regressor and non-regressor mice. Tumor infiltrating T cells in regressors were metabolically fitter than those in non-regressors, with significant enrichments of antigen-specific CD8+ T cells, T cell factor 1 (TCF1)+ T cells and CD69- T cells, compatible with induction of a sustained tumor-specific T cell response. Treg numbers were significantly reduced in both regressor and non-regressor tumors compared with untreated tumors. The remaining Treg in non-regressor tumors were however significantly enriched with cells expressing the coinhibitory receptor LAG3, compared with Treg in regressor and untreated tumors. This striking difference prompted us to sequentially block PI3Kδ and LAG3. This combination enabled successful therapy of all mice, demonstrating the functional importance of LAG3 in non-regression of tumors on PI3Kδ inhibition therapy. Follow-up studies, performed using additional cancer cell lines, namely MC38 and CT26, indicated that a partial initial response to PI3Kδ inhibition is an essential prerequisite to a sequential therapeutic benefit of anti-LAG3 antibodies. CONCLUSIONS These data indicate that LAG3 is a key bottleneck to successful PI3Kδ-targeted immunotherapy and provide a rationale for combining PI3Kδ/LAG3 blockade in future clinical studies.
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Affiliation(s)
- Sarah Nicol Lauder
- Infection and Immunity, Cardiff University Department of Medicine, Cardiff, UK
| | - Kathryn Smart
- Infection and Immunity, Cardiff University Department of Medicine, Cardiff, UK
| | | | - Danny Allen
- CRUK/MRC Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, UK
| | - Jake Scott
- Infection and Immunity, Cardiff University Department of Medicine, Cardiff, UK
| | - Ana Pires
- Infection and Immunity, Cardiff University Department of Medicine, Cardiff, UK
| | - Stefan Milutinovic
- Infection and Immunity, Cardiff University Department of Medicine, Cardiff, UK
| | - Michelle Somerville
- Infection and Immunity, Cardiff University Department of Medicine, Cardiff, UK
| | - Sean Smart
- CRUK/MRC Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, UK
| | - Paul Kinchesh
- CRUK/MRC Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, UK
| | | | - Ellyn Hughes
- Cancer Biomarker Group, Cancer Research UK Manchester Institute, The University of Manchester, Manchester, UK
| | - Emma Jones
- Infection and Immunity, Cardiff University Department of Medicine, Cardiff, UK
| | - Martin Scurr
- Infection and Immunity, Cardiff University Department of Medicine, Cardiff, UK
| | - Andrew Godkin
- Infection and Immunity, Cardiff University Department of Medicine, Cardiff, UK
| | | | - Bart Vanhaesebroeck
- UCL Cancer Institute, Paul O'Gorman Building, University College London, London, UK
| | - Awen Gallimore
- Infection and Immunity, Cardiff University Department of Medicine, Cardiff, UK
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75
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Kaboli PJ, Zhang L, Xiang S, Shen J, Li M, Zhao Y, Wu X, Zhao Q, Zhang H, Lin L, Yin J, Wu Y, Wan L, Yi T, Li X, Cho CH, Li J, Xiao Z, Wen Q. Molecular Markers of Regulatory T Cells in Cancer Immunotherapy with Special Focus on Acute Myeloid Leukemia (AML) - A Systematic Review. Curr Med Chem 2020; 27:4673-4698. [PMID: 31584362 DOI: 10.2174/0929867326666191004164041] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 08/13/2019] [Accepted: 08/28/2019] [Indexed: 12/16/2022]
Abstract
The next-generation immunotherapy can only be effective if researchers have an in-depth understanding of the function and regulation of Treg cells in antitumor immunity combined with the discovery of new immunity targets. This can enhance clinical efficacy of future and novel therapies and reduces any adverse reactions arising from the latter. This review discusses tumor treatment strategies using regulatory T (Treg) cell therapy in a Tumor Microenvironment (TME). It also discusses factors affecting TME instability as well as relevant treatments to prevent future immune disorders. It is prognosticated that PD-1 inhibitors are risky and their adverse effects should be taken into account when they are administered to treat Acute Myeloid Leukemia (AML), lung adenocarcinoma, and prostate adenocarcinoma. In contrast, Treg molecular markers FoxP3 and CD25 analyzed here have stronger expression in almost all kinds of cancers compared with normal people. However, CD25 inhibitors are more effective compared to FoxP3 inhibitors, especially in combination with TGF-β blockade, in predicting patient survival. According to the data obtained from the Cancer Genome Atlas, we then concentrate on AML immunotherapy and discuss different therapeutic strategies including anti-CD25/IL-2, anti-CTLA-4, anti-IDO, antityrosine kinase receptor, and anti-PI3K therapies and highlight the recent advances and clinical achievements in AML immunotherapy. In order to prognosticate the risk and adverse effects of key target inhibitors (namely against CTLA-4, FoxP3, CD25, and PD-1), we finally analyzed and compared the Cancer Genome Atlas derived from ten common cancers. This review shows that Treg cells are strongly increased in AML and the comparative review of key markers shows that Tregbased immunotherapy is not effective for all kinds of cancer. Therefore, blocking CD25(+)FoxP3(+) Treg cells is suggested in AML more than other kinds of cancer; meanwhile, Treg markers studied in other cancers have also great lessons for AML immunotherapy.
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Affiliation(s)
- Parham Jabbarzadeh Kaboli
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, 646000 Sichuan, China
| | - Lingling Zhang
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, 646000 Sichuan, China
| | - Shixin Xiang
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, 646000 Sichuan, China
| | - Jing Shen
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, 646000 Sichuan, China
| | - Mingxing Li
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, 646000 Sichuan, China
| | - Yueshui Zhao
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, 646000 Sichuan, China
| | - Xu Wu
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, 646000 Sichuan, China
| | - Qijie Zhao
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, 646000 Sichuan, China
| | - Hanyu Zhang
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, 646000 Sichuan, China
| | - Ling Lin
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, 646000 Sichuan, China
| | - Jianhua Yin
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, 646000 Sichuan, China
| | - Yuanlin Wu
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, 646000 Sichuan, China
| | - Lin Wan
- Department of Hematology and Oncology, The Children's Hospital of Soochow, Jiangsu, China
| | - Tao Yi
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China
| | - Xiang Li
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, 646000 Sichuan, China
| | - Chi Hin Cho
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, 646000 Sichuan, China
| | - Jing Li
- Department of Oncology and Hematology, Hospital (T.C.M) Affiliated to Southwest Medical University, Luzhou, Sichuan, China
| | - Zhangang Xiao
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, 646000 Sichuan, China
| | - Qinglian Wen
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, China
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76
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Autio KA, Klebanoff CA, Schaer D, Kauh JSW, Slovin SF, Adamow M, Blinder VS, Brahmachary M, Carlsen M, Comen E, Danila DC, Doman TN, Durack JC, Fox JJ, Gluskin JS, Hoffman DM, Kang S, Kang P, Landa J, McAndrew PF, Modi S, Morris MJ, Novosiadly R, Rathkopf DE, Sanford R, Chapman SC, Tate CM, Yu D, Wong P, McArthur HL. Immunomodulatory Activity of a Colony-stimulating Factor-1 Receptor Inhibitor in Patients with Advanced Refractory Breast or Prostate Cancer: A Phase I Study. Clin Cancer Res 2020; 26:5609-5620. [PMID: 32847933 DOI: 10.1158/1078-0432.ccr-20-0855] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 07/02/2020] [Accepted: 08/20/2020] [Indexed: 11/16/2022]
Abstract
PURPOSE Tumor-associated macrophages correlate with increased invasiveness, growth, and immunosuppression. Activation of the colony-stimulating factor-1 receptor (CSF-1R) results in proliferation, differentiation, and migration of monocytes/macrophages. This phase I study evaluated the immunologic and clinical activity, and safety profile of CSF-1R inhibition with the mAb LY3022855. PATIENTS AND METHODS Patients with advanced refractory metastatic breast cancer (MBC) or metastatic castration-resistant prostate cancer (mCRPC) were treated with LY3022855 intravenously in 6-week cycles in cohorts: (A) 1.25 mg/kg every 2 weeks (Q2W); (B) 1.0 mg/kg on weeks 1, 2, 4, and 5; (C) 100 mg once weekly; (D)100 mg Q2W. mCRPC patients were enrolled in cohorts A and B; patients with MBC were enrolled in all cohorts. Efficacy was assessed by RECIST and Prostate Cancer Clinical Trials Working Group 2 criteria. RESULTS Thirty-four patients (22 MBC; 12 mCRPC) received ≥1 dose of LY3022855. At day 8, circulating CSF-1 levels increased and proinflammatory monocytes CD14DIMCD16BRIGHT decreased. Best RECIST response was stable disease in five patients with MBC (23%; duration, 82-302 days) and three patients with mCRPC (25%; duration, 50-124 days). Two patients with MBC (cohort A) had durable stable disease >9 months and a third patient with MBC had palpable reduction in a nontarget neck mass. Immune-related gene activation in tumor biopsies posttreatment was observed. Common any grade treatment-related adverse events were fatigue, decreased appetite, nausea, asymptomatic increased lipase, and creatine phosphokinase. CONCLUSIONS LY3022855 was well tolerated and showed evidence of immune modulation. Clinically meaningful stable disease >9 months was observed in two patients with MBC.
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Affiliation(s)
- Karen A Autio
- Memorial Sloan Kettering Cancer Center, New York, New York. .,Weill Cornell Medical College, New York, New York
| | - Christopher A Klebanoff
- Memorial Sloan Kettering Cancer Center, New York, New York.,Weill Cornell Medical College, New York, New York.,Parker Institute for Cancer Immunotherapy, New York, New York
| | | | | | - Susan F Slovin
- Memorial Sloan Kettering Cancer Center, New York, New York.,Weill Cornell Medical College, New York, New York
| | - Matthew Adamow
- Memorial Sloan Kettering Cancer Center, New York, New York
| | - Victoria S Blinder
- Memorial Sloan Kettering Cancer Center, New York, New York.,Weill Cornell Medical College, New York, New York
| | | | | | - Elizabeth Comen
- Memorial Sloan Kettering Cancer Center, New York, New York.,Weill Cornell Medical College, New York, New York
| | - Daniel C Danila
- Memorial Sloan Kettering Cancer Center, New York, New York.,Weill Cornell Medical College, New York, New York
| | | | - Jeremy C Durack
- Memorial Sloan Kettering Cancer Center, New York, New York.,Weill Cornell Medical College, New York, New York
| | - Josef J Fox
- Memorial Sloan Kettering Cancer Center, New York, New York.,Weill Cornell Medical College, New York, New York
| | - Jill S Gluskin
- Memorial Sloan Kettering Cancer Center, New York, New York.,Weill Cornell Medical College, New York, New York
| | | | - Suhyun Kang
- Eli Lilly and Company, Indianapolis, Indiana
| | - Praneet Kang
- Memorial Sloan Kettering Cancer Center, New York, New York
| | - Jonathan Landa
- Memorial Sloan Kettering Cancer Center, New York, New York.,Weill Cornell Medical College, New York, New York
| | | | - Shanu Modi
- Memorial Sloan Kettering Cancer Center, New York, New York.,Weill Cornell Medical College, New York, New York
| | - Michael J Morris
- Memorial Sloan Kettering Cancer Center, New York, New York.,Weill Cornell Medical College, New York, New York
| | - Ruslan Novosiadly
- Eli Lilly and Company, New York, New York.,Bristol-Myers Squibb, Princeton, New Jersey
| | - Dana E Rathkopf
- Memorial Sloan Kettering Cancer Center, New York, New York.,Weill Cornell Medical College, New York, New York
| | - Rachel Sanford
- Memorial Sloan Kettering Cancer Center, New York, New York.,Weill Cornell Medical College, New York, New York
| | | | | | - Danni Yu
- Eli Lilly and Company, Indianapolis, Indiana
| | - Phillip Wong
- Memorial Sloan Kettering Cancer Center, New York, New York
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Győri DS, Mócsai A. Osteoclast Signal Transduction During Bone Metastasis Formation. Front Cell Dev Biol 2020; 8:507. [PMID: 32637413 PMCID: PMC7317091 DOI: 10.3389/fcell.2020.00507] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 05/27/2020] [Indexed: 12/18/2022] Open
Abstract
Osteoclasts are myeloid lineage-derived bone-resorbing cells of hematopoietic origin. They differentiate from myeloid precursors through a complex regulation process where the differentiation of preosteoclasts is followed by intercellular fusion to generate large multinucleated cells. Under physiological conditions, osteoclastogenesis is primarily directed by interactions between CSF-1R and macrophage colony-stimulating factor (M-CSF, CSF-1), receptor activator of nuclear factor NF-κB (RANK) and RANK ligand (RANKL), as well as adhesion receptors (e.g., integrins) and their ligands. Osteoclasts play a central role in physiological and pathological bone resorption and are also required for excessive bone loss during osteoporosis, inflammatory bone and joint diseases (such as rheumatoid arthritis) and cancer cell-induced osteolysis. Due to the major role of osteoclasts in these diseases the better understanding of their intracellular signaling pathways can lead to the identification of potential novel therapeutic targets. Non-receptor tyrosine kinases and lipid kinases play major roles in osteoclasts and small-molecule kinase inhibitors are emerging new therapeutics in diseases with pathological bone loss. During the last few years, we and others have shown that certain lipid (such as phosphoinositide 3-kinases PI3Kβ and PI3Kδ) and tyrosine (Src-family and Syk) kinases play a critical role in osteoclast differentiation and function in humans and mice. Some of these signaling pathways shows similarity to immunoreceptor-like receptor signaling and involves important other enzymes (e.g., PLCγ2) and adapter proteins (such as the ITAM-bearing adapters DAP12 and the Fc-receptor γ-chain). Here, we review recently identified osteoclast signaling pathways and their role in osteoclast differentiation and function as well as pathological bone loss associated with osteolytic tumors of the bone. A better understanding of osteoclast signaling may facilitate the design of novel and more efficient therapies for pathological bone resorption and osteolytic skeletal metastasis formation.
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Affiliation(s)
- Dávid S. Győri
- Department of Physiology, Faculty of Medicine, Semmelweis University, Budapest, Hungary
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78
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p110δ PI3K as a therapeutic target of solid tumours. Clin Sci (Lond) 2020; 134:1377-1397. [DOI: 10.1042/cs20190772] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Revised: 05/21/2020] [Accepted: 06/01/2020] [Indexed: 12/12/2022]
Abstract
AbstractFrom the time of first characterization of PI3K as a heterodimer made up of a p110 catalytic subunit and a regulatory subunit, a wealth of evidence have placed the class IA PI3Ks at the forefront of drug development for the treatment of various diseases including cancer. The p110α isoform was quickly brought at the centre of attention in the field of cancer research by the discovery of cancer-specific gain-of-function mutations in PIK3CA gene in a range of human solid tumours. In contrast, p110δ PI3K was placed into the spotlight of immunity, inflammation and haematologic malignancies because of the preferential expression of this isoform in leucocytes and the rare mutations in PIK3CD gene. The last decade, however, several studies have provided evidence showing that the correlation between the PIK3CA mutations and the response to PI3K inhibition is less clear than originally considered, whereas concurrently an unexpected role of p110δ PI3K in solid tumours has being emerging. While PIK3CD is mostly non-mutated in cancer, the expression levels of p110δ protein seem to act as an intrinsic cancer-causing driver in various solid tumours including breast, prostate, colorectal and liver cancer, Merkel-Cell carcinoma, glioblastoma and neurobalstoma. Furthermore, p110δ selective inhibitors are being studied as potential single agent treatments or as combination partners in attempt to improve cancer immunotherapy, with both strategies to shown great promise for the treatment of several solid tumours. In this review, we discuss the evidence implicating the p110δ PI3K in human solid tumours, their impact on the current state of the field and the potential of using p110δ-selective inhibitors as monotherapy or combined therapy in different cancer contexts.
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79
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Kwon Y, Kim M, Kim Y, Jung HS, Jeoung D. Exosomal MicroRNAs as Mediators of Cellular Interactions Between Cancer Cells and Macrophages. Front Immunol 2020; 11:1167. [PMID: 32595638 PMCID: PMC7300210 DOI: 10.3389/fimmu.2020.01167] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 05/12/2020] [Indexed: 02/06/2023] Open
Abstract
Tumor microenvironment consists of cancer cells and various stromal cells such as endothelial cells, cancer-associated fibroblasts (CAFs), myeloid-derived suppressor cells (MDSCs), neutrophils, macrophages, and other innate and adaptive immune cells. Of these innate immune cells, macrophages are an extremely heterogeneous population, and display both pro-inflammatory and anti-inflammatory functions. While M1 macrophages (classically activated macrophages) display anti-tumoral and pro-inflammatory functions, M2 macrophages display pro-tumoral and anti-inflammatory functions. Cellular interactions and molecular factors in the tumor microenvironment affect the polarization of macrophages. We review molecules and immune cells that influence the polarization status of macrophages. Tumor-associated macrophages (TAMs) generally express M2 phenotype, and mediate many processes that include tumor initiation, angiogenesis, and metastasis. A high number of TAMs has been associated with the poor prognosis of cancers. MicroRNAs (miRNAs) have been known to regulate cellular interactions that involve cancer cells and macrophages. Tumor-derived exosomes play critical roles in inducing the M1 or M2-like polarization of macrophages. The roles of exosomal miRNAs from tumor cells in the polarization of macrophages are also discussed and the targets of these miRNAs are presented. We review the effects of exosomal miRNAs from TAMs on cancer cell invasion, growth, and anti-cancer drug resistance. The relevance of exosomal microRNAs (miRNAs) as targets for the development of anti-cancer drugs is discussed. We review recent progress in the development of miRNA therapeutics aimed at elevating or decreasing levels of miRNAs.
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Affiliation(s)
- Yoojung Kwon
- Department of Biochemistry, College of Natural Sciences, Kangwon National University, Chuncheon, South Korea
| | - Misun Kim
- Department of Biochemistry, College of Natural Sciences, Kangwon National University, Chuncheon, South Korea
| | - Youngmi Kim
- Institute of New Frontier Research, College of Medicine, Hallym University, Chuncheon, South Korea
| | - Hyun Suk Jung
- Department of Biochemistry, College of Natural Sciences, Kangwon National University, Chuncheon, South Korea
| | - Dooil Jeoung
- Department of Biochemistry, College of Natural Sciences, Kangwon National University, Chuncheon, South Korea
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80
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Ashrafizadeh M, Farhood B, Eleojo Musa A, Taeb S, Rezaeyan A, Najafi M. Abscopal effect in radioimmunotherapy. Int Immunopharmacol 2020; 85:106663. [PMID: 32521494 DOI: 10.1016/j.intimp.2020.106663] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 05/31/2020] [Accepted: 06/02/2020] [Indexed: 12/20/2022]
Abstract
Abscopal effect is an interesting phenomenon in radiobiology that causes activation of immune system against cancer cells. Traditionally, this phenomenon was known as a suppressor of non-irradiated tumors or metastasis. However, it can be used as a stimulator of the immune system against primary tumor during radiotherapy. Immunotherapy, a novel tumor therapy modality, also triggers immune system against cancer. To date, some immunotherapy types have been developed. However, immune checkpoint blockade is a more common modality and some drugs have been approved by the FDA. Studies have shown that radiotherapy or immunotherapy administered alone have low efficiency for tumor control. However, their combination has a more potent anti-tumor immunity. For this aim, it is important to induce abscopal effect in primary tumors, and also use appropriate drugs to target the mechanisms involved in the exhaustion of cytotoxic CD8+T lymphocytes (CTLs) and natural killer (NK) cells. Among the different radiotherapy techniques, stereotactic body radiation therapy (SBRT) with some few fractionations is the best choice for inducing abscopal effect. On the other hand, programmed cell death 1 (PD-1) is known as one of the best targets for triggering anti-tumor immunity. This combination is known as the best choice among various strategies for radioimmunotherapy. However, there is the need for other strategies to improve the duration of immune system's activity within tumor microenvironment (TME). In this review, we explain the cellular and molecular mechanisms behind abscopal effect by radiotherapy and evaluate the molecular targets which induce potent anti-tumor immunity.
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Affiliation(s)
- Milad Ashrafizadeh
- Department of Basic Science, Faculty of Veterinary Medicine, University of Tabriz, Tabriz, Iran
| | - Bagher Farhood
- Department of Medical Physics and Radiology, Faculty of Paramedical Sciences, Kashan University of Medical Sciences, Kashan, Iran
| | - Ahmed Eleojo Musa
- Department of Medical Physics, Tehran University of Medical Sciences (International Campus), Tehran, Iran
| | - Shahram Taeb
- Ionizing and Non-Ionizing Radiation Protection Research Center (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran
| | - Abolhassan Rezaeyan
- Department of Medical Physics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Masoud Najafi
- Radiology and Nuclear Medicine Department, School of Paramedical Sciences, Kermanshah University of Medical Sciences, Kermanshah, Iran.
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81
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Storz P, Crawford HC. Carcinogenesis of Pancreatic Ductal Adenocarcinoma. Gastroenterology 2020; 158:2072-2081. [PMID: 32199881 PMCID: PMC7282937 DOI: 10.1053/j.gastro.2020.02.059] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 02/03/2020] [Accepted: 02/05/2020] [Indexed: 12/13/2022]
Abstract
Although the estimated time for development of pancreatic ductal adenocarcinoma (PDA) is more than 20 years, PDAs are usually detected at late, metastatic stages. PDAs develop from duct-like cells through a multistep carcinogenesis process, from low-grade dysplastic lesions to carcinoma in situ and eventually to metastatic disease. This process involves gradual acquisition of mutations in oncogenes and tumor suppressor genes, as well as changes in the pancreatic environment from a pro-inflammatory microenvironment that favors the development of early lesions, to a desmoplastic tumor microenvironment that is highly fibrotic and immune suppressive. This review discusses our current understanding of how PDA originates.
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Affiliation(s)
- Peter Storz
- Department of Cancer Biology, Mayo Clinic Comprehensive Cancer Center, Mayo Clinic, Jacksonville, Florida.
| | - Howard C. Crawford
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan, USA, To whom correspondence should be addressed: Peter Storz, Mayo Clinic, Griffin Room 306, 4500 San Pablo Road, Jacksonville, FL 32224. Phone: (904) 953-6909, ; or Howard Crawford, University of Michigan, 4304 Rogel Cancer Center, 1500 E. Medical Center Drive Ann Arbor, MI 48109. Phone: (734) 764-3815,
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82
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Poli A, Fiume R, Mongiorgi S, Zaurito A, Sheth B, Vidalle MC, Hamid SA, Kimber S, Campagnoli F, Ratti S, Rusciano I, Faenza I, Manzoli L, Divecha N. Exploring the controversial role of PI3K signalling in CD4 + regulatory T (T-Reg) cells. Adv Biol Regul 2020; 76:100722. [PMID: 32362560 DOI: 10.1016/j.jbior.2020.100722] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 04/10/2020] [Accepted: 04/16/2020] [Indexed: 02/07/2023]
Abstract
The immune system is a complex network that acts to protect vertebrates from foreign microorganisms and carries out immunosurveillance to combat cancer. In order to avoid hyper-activation of the immune system leading to collateral damage tissues and organs and to prevent self-attack, the network has the intrinsic control mechanisms that negatively regulate immune responses. Central to this negative regulation are regulatory T (T-Reg) cells, which through cytokine secretion and cell interaction limit uncontrolled clonal expansion and functions of activated immune cells. Given that positive or negative manipulation of T-Regs activity could be utilised to therapeutically treat host versus graft rejection or cancer respectively, understanding how signaling pathways impact on T-Regs function should reveal potential targets with which to intervene. The phosphatidylinositol-3-kinase (PI3K) pathway controls a vast array of cellular processes and is critical in T cell activation. Here we focus on phosphoinositide 3-kinases (PI3Ks) and their ability to regulate T-Regs cell differentiation and function.
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Affiliation(s)
- Alessandro Poli
- The FIRC Institute of Molecular Oncology (IFOM), 20139, Milan, Italy
| | - Roberta Fiume
- Department of Biomedical Sciences (DIBINEM), University of Bologna, Via Irnerio, 48, 40126, Bologna, Italy.
| | - Sara Mongiorgi
- Department of Biomedical Sciences (DIBINEM), University of Bologna, Via Irnerio, 48, 40126, Bologna, Italy
| | - Antonio Zaurito
- Center for Translational Cancer Research (TranslaTUM), Klinikum Rechts der Isar, Technische Universität München, 81675, Munich, Germany
| | - Bhavwanti Sheth
- Inositide Laboratory, School of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Life Sciences Building 85, Highfield, Southampton, SO17 1BJ, UK
| | - Magdalena Castellano Vidalle
- Inositide Laboratory, School of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Life Sciences Building 85, Highfield, Southampton, SO17 1BJ, UK
| | - Shidqiyyah Abdul Hamid
- Inositide Laboratory, School of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Life Sciences Building 85, Highfield, Southampton, SO17 1BJ, UK
| | - ScottT Kimber
- Inositide Laboratory, School of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Life Sciences Building 85, Highfield, Southampton, SO17 1BJ, UK
| | - Francesca Campagnoli
- Inositide Laboratory, School of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Life Sciences Building 85, Highfield, Southampton, SO17 1BJ, UK
| | - Stefano Ratti
- Department of Biomedical Sciences (DIBINEM), University of Bologna, Via Irnerio, 48, 40126, Bologna, Italy
| | - Isabella Rusciano
- Department of Biomedical Sciences (DIBINEM), University of Bologna, Via Irnerio, 48, 40126, Bologna, Italy
| | - Irene Faenza
- Department of Biomedical Sciences (DIBINEM), University of Bologna, Via Irnerio, 48, 40126, Bologna, Italy
| | - Lucia Manzoli
- Department of Biomedical Sciences (DIBINEM), University of Bologna, Via Irnerio, 48, 40126, Bologna, Italy
| | - Nullin Divecha
- Inositide Laboratory, School of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Life Sciences Building 85, Highfield, Southampton, SO17 1BJ, UK
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83
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Liu M, Tong Z, Ding C, Luo F, Wu S, Wu C, Albeituni S, He L, Hu X, Tieri D, Rouchka EC, Hamada M, Takahashi S, Gibb AA, Kloecker G, Zhang HG, Bousamra M, Hill BG, Zhang X, Yan J. Transcription factor c-Maf is a checkpoint that programs macrophages in lung cancer. J Clin Invest 2020; 130:2081-2096. [PMID: 31945018 PMCID: PMC7108920 DOI: 10.1172/jci131335] [Citation(s) in RCA: 111] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 01/14/2020] [Indexed: 12/24/2022] Open
Abstract
Macrophages have been linked to tumor initiation, progression, metastasis, and treatment resistance. However, the transcriptional regulation of macrophages driving the protumor function remains elusive. Here, we demonstrate that the transcription factor c-Maf is a critical controller for immunosuppressive macrophage polarization and function in cancer. c-Maf controls many M2-related genes and has direct binding sites within a conserved noncoding sequence of the Csf-1r gene and promotes M2-like macrophage-mediated T cell suppression and tumor progression. c-Maf also serves as a metabolic checkpoint regulating the TCA cycle and UDP-GlcNAc biosynthesis, thus promoting M2-like macrophage polarization and activation. Additionally, c-Maf is highly expressed in tumor-associated macrophages (TAMs) and regulates TAM immunosuppressive function. Deletion of c-Maf specifically in myeloid cells results in reduced tumor burden with enhanced antitumor T cell immunity. Inhibition of c-Maf partly overcomes resistance to anti-PD-1 therapy in a subcutaneous LLC tumor model. Similarly, c-Maf is expressed in human M2 and tumor-infiltrating macrophages/monocytes as well as circulating monocytes of human non-small cell lung carcinoma (NSCLC) patients and critically regulates their immunosuppressive activity. The natural compound β-glucan downregulates c-Maf expression on macrophages, leading to enhanced antitumor immunity in mice. These findings establish a paradigm for immunosuppressive macrophage polarization and transcriptional regulation by c-Maf and suggest that c-Maf is a potential target for effective tumor immunotherapy.
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MESH Headings
- Animals
- Carcinoma, Non-Small-Cell Lung/genetics
- Carcinoma, Non-Small-Cell Lung/immunology
- Carcinoma, Non-Small-Cell Lung/pathology
- Carcinoma, Non-Small-Cell Lung/therapy
- Cell Line, Tumor
- Female
- Gene Expression Regulation, Neoplastic/immunology
- Humans
- Immunity, Cellular
- Lung Neoplasms/immunology
- Lung Neoplasms/pathology
- Lung Neoplasms/therapy
- Macrophage Activation
- Macrophages/immunology
- Macrophages/pathology
- Male
- Mice
- Mice, Knockout
- Monocytes/immunology
- Monocytes/pathology
- Neoplasms, Experimental/genetics
- Neoplasms, Experimental/immunology
- Neoplasms, Experimental/pathology
- Neoplasms, Experimental/therapy
- Proto-Oncogene Proteins c-maf/genetics
- Proto-Oncogene Proteins c-maf/immunology
- T-Lymphocytes/immunology
- T-Lymphocytes/pathology
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Affiliation(s)
- Min Liu
- Division of Immunotherapy, Hiram C. Polk, Jr., MD Department of Surgery, Immuno-Oncology Program, James Graham Brown Cancer Center, University of Louisville, Louisville, Kentucky, USA
| | - Zan Tong
- Division of Immunotherapy, Hiram C. Polk, Jr., MD Department of Surgery, Immuno-Oncology Program, James Graham Brown Cancer Center, University of Louisville, Louisville, Kentucky, USA
| | - Chuanlin Ding
- Division of Immunotherapy, Hiram C. Polk, Jr., MD Department of Surgery, Immuno-Oncology Program, James Graham Brown Cancer Center, University of Louisville, Louisville, Kentucky, USA
| | - Fengling Luo
- Division of Immunotherapy, Hiram C. Polk, Jr., MD Department of Surgery, Immuno-Oncology Program, James Graham Brown Cancer Center, University of Louisville, Louisville, Kentucky, USA
| | - Shouzhen Wu
- Division of Immunotherapy, Hiram C. Polk, Jr., MD Department of Surgery, Immuno-Oncology Program, James Graham Brown Cancer Center, University of Louisville, Louisville, Kentucky, USA
| | - Caijun Wu
- Division of Immunotherapy, Hiram C. Polk, Jr., MD Department of Surgery, Immuno-Oncology Program, James Graham Brown Cancer Center, University of Louisville, Louisville, Kentucky, USA
| | | | | | - Xiaoling Hu
- Division of Immunotherapy, Hiram C. Polk, Jr., MD Department of Surgery, Immuno-Oncology Program, James Graham Brown Cancer Center, University of Louisville, Louisville, Kentucky, USA
| | - David Tieri
- Department of Anatomical Sciences and Neurobiology, and
| | - Eric C. Rouchka
- Department of Computer Engineering and Computer Science, University of Louisville, Louisville, Kentucky, USA
| | - Michito Hamada
- Department of Anatomy and Embryology, University of Tsukuba, Ibaraki, Japan
| | - Satoru Takahashi
- Department of Anatomy and Embryology, University of Tsukuba, Ibaraki, Japan
| | | | - Goetz Kloecker
- Division of Immunotherapy, Hiram C. Polk, Jr., MD Department of Surgery, Immuno-Oncology Program, James Graham Brown Cancer Center, University of Louisville, Louisville, Kentucky, USA
| | - Huang-ge Zhang
- Department of Microbiology and Immunology, School of Medicine
| | - Michael Bousamra
- Department of Cardiovascular Thoracic Surgery, University of Louisville, Louisville, Kentucky, USA
| | | | | | - Jun Yan
- Division of Immunotherapy, Hiram C. Polk, Jr., MD Department of Surgery, Immuno-Oncology Program, James Graham Brown Cancer Center, University of Louisville, Louisville, Kentucky, USA
- Department of Microbiology and Immunology, School of Medicine
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84
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Galon J, Bruni D. Tumor Immunology and Tumor Evolution: Intertwined Histories. Immunity 2020; 52:55-81. [PMID: 31940273 DOI: 10.1016/j.immuni.2019.12.018] [Citation(s) in RCA: 325] [Impact Index Per Article: 81.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 07/01/2019] [Accepted: 12/20/2019] [Indexed: 12/11/2022]
Abstract
Cancer is a complex disease whose outcome depends largely on the cross-talk between the tumor and its microenvironment. Here, we review the evolution of the field of tumor immunology and the advances, in lockstep, of our understanding of cancer as a disease. We discuss the involvement of different immune cells at distinct stages of tumor progression and how immune contexture determinants shaping tumor development are being exploited therapeutically. Current clinical stratification schemes focus on the tumor histopathology and the molecular characteristics of the tumor cell. We argue for the importance of revising these stratification systems to include immune parameters so as to address the immediate need for improved prognostic and/or predictive information to guide clinical decisions.
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Affiliation(s)
- Jérôme Galon
- INSERM, Laboratory of Integrative Cancer Immunology, Equipe Labellisée Ligue Contre le Cancer, Sorbonne Université, Sorbonne Paris Cité, Université Paris Descartes, Université Paris Diderot, Université de Paris; Centre de Recherche des Cordeliers, F-75006 Paris, France.
| | - Daniela Bruni
- INSERM, Laboratory of Integrative Cancer Immunology, Equipe Labellisée Ligue Contre le Cancer, Sorbonne Université, Sorbonne Paris Cité, Université Paris Descartes, Université Paris Diderot, Université de Paris; Centre de Recherche des Cordeliers, F-75006 Paris, France
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85
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Macciò A, Madeddu C. Blocking inflammation to improve immunotherapy of advanced cancer. Immunology 2019; 159:357-364. [PMID: 31821533 DOI: 10.1111/imm.13164] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 11/27/2019] [Accepted: 12/02/2019] [Indexed: 12/19/2022] Open
Abstract
The ability to induce functional reprogramming of regulatory T (Treg) cells in the tumor microenvironment is an extremely important therapeutic opportunity. However, when discussing such an approach, the opposing effect that the activation of the Treg cell compartments may have in inducing the immune inflammatory response and its link with the efficacy of immunotherapy should be considered. In fact, Treg reprogramming has a dual effect: immediate, with mechanisms that activate immunosurveillance, and late, mediated by the macrophage activation that yields an inflammatory status that is deleterious for the antineoplastic efficiency of the immune system response. Persistence of the inflammatory response is associated with specific changes of oxidative and glycolytic metabolic pathways that interfere with conventional T-cell activation and function and may be one of the reasons for the failure of immunotherapy in advanced cancer patients. Therefore, in addition to modulating Treg cell action, the combined use of drugs able to block chronic inflammation mediated mainly by macrophages, to counteract the oxidative stress, and to positively regulate the metabolic derangements, could improve the effectiveness of modern immunotherapy. In conclusion, reprogramming of Treg cells may be an appropriate strategy for treating early stages of neoplastic diseases, whereas other immunosuppressive mechanisms should be the target of a combined immunotherapy approach in more advanced phases of cancer.
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Affiliation(s)
- Antonio Macciò
- Department of Gynecologic Oncology, Azienda Ospedaliera Brotzu, Cagliari, Italy
| | - Clelia Madeddu
- Department of Medical Sciences and Public Health, University of Cagliari, Cagliari, Italy
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86
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Catalano I, Grassi E, Bertotti A, Trusolino L. Immunogenomics of Colorectal Tumors: Facts and Hypotheses on an Evolving Saga. Trends Cancer 2019; 5:779-788. [PMID: 31813455 DOI: 10.1016/j.trecan.2019.10.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 10/14/2019] [Accepted: 10/16/2019] [Indexed: 01/10/2023]
Abstract
Immunotherapy with immune checkpoint inhibitors is an approved treatment option for a subpopulation of patients with colorectal cancers that display microsatellite instability. However, not all individuals within this subgroup respond to immunotherapy, and molecular biomarkers for effective patient stratification are still lacking. In this opinion article, we provide an overview of the different biological parameters that contribute to rendering colorectal cancers with microsatellite instability potentially sensitive to immunotherapy. We critically discuss the reasons why such parameters have limited predictive value and the implications therein. We also consider that a more informed knowledge of response determinants in this tumor subtype could help understand the mechanisms of immunotherapy resistance in microsatellite stable tumors. We conclude that the dynamic nature of the interactions between cancer and immune cells complicates conventional biomarker development and argue that a new generation of adaptive metrics, borrowed from evolutionary genetics, may improve the effectiveness and reliability of clinical decision making.
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Affiliation(s)
- Irene Catalano
- Department of Oncology, University of Torino, 10060 Candiolo, Torino, Italy; Candiolo Cancer Institute - FPO IRCCS, 10060 Candiolo, Torino, Italy
| | - Elena Grassi
- Candiolo Cancer Institute - FPO IRCCS, 10060 Candiolo, Torino, Italy
| | - Andrea Bertotti
- Department of Oncology, University of Torino, 10060 Candiolo, Torino, Italy; Candiolo Cancer Institute - FPO IRCCS, 10060 Candiolo, Torino, Italy
| | - Livio Trusolino
- Department of Oncology, University of Torino, 10060 Candiolo, Torino, Italy; Candiolo Cancer Institute - FPO IRCCS, 10060 Candiolo, Torino, Italy.
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87
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Abstract
New therapies that promote antitumour immunity have been recently developed. Most of these immunomodulatory approaches have focused on enhancing T-cell responses, either by targeting inhibitory pathways with immune checkpoint inhibitors, or by targeting activating pathways, as with chimeric antigen receptor T cells or bispecific antibodies. Although these therapies have led to unprecedented successes, only a minority of patients with cancer benefit from these treatments, highlighting the need to identify new cells and molecules that could be exploited in the next generation of immunotherapy. Given the crucial role of innate immune responses in immunity, harnessing these responses opens up new possibilities for long-lasting, multilayered tumour control.
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88
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Jahchan NS, Mujal AM, Pollack JL, Binnewies M, Sriram V, Reyno L, Krummel MF. Tuning the Tumor Myeloid Microenvironment to Fight Cancer. Front Immunol 2019; 10:1611. [PMID: 31402908 PMCID: PMC6673698 DOI: 10.3389/fimmu.2019.01611] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 06/27/2019] [Indexed: 12/14/2022] Open
Abstract
The tumor microenvironment (TME) of diverse cancer types is often characterized by high levels of infiltrating myeloid cells including monocytes, macrophages, dendritic cells, and granulocytes. These cells perform a variety of functions in the TME, varying from immune suppressive to immune stimulatory roles. In this review, we summarize the different myeloid cell populations in the TME and the intratumoral myeloid targeting approaches that are being clinically investigated, and discuss strategies that identify new myeloid subpopulations within the TME. The TME therapies include agents that modulate the functional activities of myeloid populations, that impact recruitment and survival of myeloid subpopulations, and that functionally reprogram or activate myeloid populations. We discuss the benefits, limitations and potential side effects of these therapeutic approaches.
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Affiliation(s)
| | - Adriana M. Mujal
- Department of Pathology, University of California, San Francisco, San Francisco, CA, United States
| | | | | | | | - Leonard Reyno
- Pionyr Immunotherapeutics, South San Francisco, CA, United States
| | - Matthew F. Krummel
- Department of Pathology, University of California, San Francisco, San Francisco, CA, United States
- ImmunoX Initiative, University of California, San Francisco, San Francisco, CA, United States
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89
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Quaranta V, Schmid MC. Macrophage-Mediated Subversion of Anti-Tumour Immunity. Cells 2019; 8:E747. [PMID: 31331034 PMCID: PMC6678757 DOI: 10.3390/cells8070747] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 07/15/2019] [Accepted: 07/17/2019] [Indexed: 12/12/2022] Open
Abstract
Despite the incredible clinical benefits obtained by the use of immune checkpoint blockers (ICBs), resistance is still common for many types of cancer. Central for ICBs to work is activation and infiltration of cytotoxic CD8+ T cells following tumour-antigen recognition. However, it is now accepted that even in the case of immunogenic tumours, the effector functions of CD8+ T cells are highly compromised by the presence of an immunosuppressive tumour microenvironment (TME) at the tumour site. Tumour-associated macrophages (TAMs) are among the most abundant non-malignant stromal cell types within the TME and they are crucial drivers of tumour progression, metastasis and resistance to therapy. TAMs are able to regulate either directly or indirectly various aspects of tumour immunity, including T cell recruitment and functions. In this review we discuss the mechanisms by which TAMs subvert CD8+ T cell immune surveillance and how their targeting in combination with ICBs represents a very powerful therapeutic strategy.
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Affiliation(s)
- Valeria Quaranta
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Ashton Street, Liverpool L69 3GE, UK
| | - Michael C Schmid
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Ashton Street, Liverpool L69 3GE, UK.
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90
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Lim EL, Okkenhaug K. Phosphoinositide 3-kinase δ is a regulatory T-cell target in cancer immunotherapy. Immunology 2019; 157:210-218. [PMID: 31107985 PMCID: PMC6587315 DOI: 10.1111/imm.13082] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 05/02/2019] [Accepted: 05/16/2019] [Indexed: 12/15/2022] Open
Abstract
Tumour infiltration by regulatory T (Treg) cells contributes to suppression of the anti-tumour immune response, which limits the efficacy of immune-mediated cancer therapies. The phosphoinositide 3-kinase (PI3K) pathway has key roles in mediating the function of many immune cell subsets, including Treg cells. Treg function is context-dependent and depends on input from different cell surface receptors, many of which can activate the PI3K pathway. In this review, we explore how PI3Kδ contributes to signalling through several major immune cell receptors, including the T-cell receptor and co-stimulatory receptors such as CD28 and ICOS, but is antagonized by the immune checkpoint receptors CTLA-4 and PD-1. Understanding how PI3Kδ inhibition affects Treg signalling events will help to inform how best to use PI3Kδ inhibitors in clinical cancer treatment.
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Affiliation(s)
- Ee Lyn Lim
- Laboratory of Experimental ImmunologyImmunology Frontier Research CentreOsaka UniversitySuitaJapan
| | - Klaus Okkenhaug
- Division of ImmunologyDepartment of PathologyUniversity of CambridgeCambridgeUK
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91
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The Emerging Role of Checkpoint Inhibition in Microsatellite Stable Colorectal Cancer. J Pers Med 2019; 9:jpm9010005. [PMID: 30654522 PMCID: PMC6463010 DOI: 10.3390/jpm9010005] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 01/05/2019] [Accepted: 01/11/2019] [Indexed: 12/22/2022] Open
Abstract
Checkpoint inhibitor therapy has introduced a revolution in contemporary anticancer therapy. It has led to dramatic improvements in patient outcomes and has spawned tremendous research into novel immunomodulatory agents and combination therapy that has changed the trajectory of cancer care. However, clinical benefit in patients with colorectal cancer has been generally limited to tumors with loss of mismatch repair function and those with specific germline mutations in the DNA polymerase gene. Unfortunately, tumors with these specific mutator phenotypes are in the minority. Recent pre-clinical and clinical studies have begun to reveal encouraging results suggesting that checkpoint inhibitor therapy can be expanded to an increasing number of colorectal tumors with microsatellite stability and the absence of traditional predictive biomarkers of checkpoint inhibitor response. These studies generally rely on combinations of checkpoint inhibitors with chemotherapy, molecular targeted therapy, radiation therapy, or other novel immunomodulatory agents. This article will review the most current data in microsatellite stable colorectal cancer.
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92
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Lim EL, Cugliandolo FM, Rosner DR, Gyori D, Roychoudhuri R, Okkenhaug K. Phosphoinositide 3-kinase δ inhibition promotes antitumor responses but antagonizes checkpoint inhibitors. JCI Insight 2018; 3:120626. [PMID: 29875319 PMCID: PMC6124416 DOI: 10.1172/jci.insight.120626] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 05/01/2018] [Indexed: 12/17/2022] Open
Abstract
Multiple modes of immunosuppression restrain immune function within tumors. We previously reported that phosphoinositide 3-kinase δ (PI3Kδ) inactivation in mice confers resistance to a range of tumor models by disrupting immunosuppression mediated by regulatory T cells (Tregs). The PI3Kδ inhibitor idelalisib has proven highly effective in the clinical treatment of chronic lymphocytic leukemia and the potential to extend the use of PI3Kδ inhibitors to nonhematological cancers is being evaluated. In this work, we demonstrate that the antitumor effect of PI3Kδ inactivation is primarily mediated through the disruption of Treg function, and correlates with tumor dependence on Treg immunosuppression. Compared with Treg-specific PI3Kδ deletion, systemic PI3Kδ inactivation is less effective at conferring resistance to tumors. We show that PI3Kδ deficiency impairs the maturation and reduces the capacity of CD8+ cytotoxic T lymphocytes (CTLs) to kill tumor cells in vitro, and to respond to tumor antigen-specific immunization in vivo. PI3Kδ inactivation antagonized the antitumor effects of tumor vaccines and checkpoint blockade therapies intended to boost the CD8+ T cell response. These findings provide insights into mechanisms by which PI3Kδ inhibition promotes antitumor immunity and demonstrate that the mechanism is distinct from that mediated by immune checkpoint blockade.
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Affiliation(s)
- Ee Lyn Lim
- Laboratory of Lymphocyte Signalling and Development, The Babraham Institute, Cambridge, United Kingdom
| | - Fiorella M. Cugliandolo
- Laboratory of Lymphocyte Signalling and Development, The Babraham Institute, Cambridge, United Kingdom
| | - Dalya R. Rosner
- Laboratory of Lymphocyte Signalling and Development, The Babraham Institute, Cambridge, United Kingdom
| | - David Gyori
- Laboratory of Lymphocyte Signalling and Development, The Babraham Institute, Cambridge, United Kingdom
| | - Rahul Roychoudhuri
- Laboratory of Lymphocyte Signalling and Development, The Babraham Institute, Cambridge, United Kingdom
| | - Klaus Okkenhaug
- Laboratory of Lymphocyte Signalling and Development, The Babraham Institute, Cambridge, United Kingdom
- Division of Immunology, Department of Pathology, University of Cambridge, Cambridge, United Kingdom
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