201
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O'Connor MA, Vella JL, Green WR. Reciprocal relationship of T regulatory cells and monocytic myeloid-derived suppressor cells in LP-BM5 murine retrovirus-induced immunodeficiency. J Gen Virol 2015; 97:509-522. [PMID: 26253145 DOI: 10.1099/jgv.0.000260] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Immunomodulatory cellular subsets, including myeloid-derived suppressor cells (MDSCs) and T regulatory cells (Tregs), contribute to the immunosuppressive tumour microenvironment and are targets of immunotherapy, but their role in retroviral-associated immunosuppression is less well understood. Due to known crosstalk between Tregs and MDSCs in the tumour microenvironment, and also their hypothesized involvement during human immunodeficiency virus/simian immunodeficiency virus infection, studying the interplay between these immune cells during LP-BM5 retrovirus-induced murine AIDS is of interest. IL-10-producing FoxP3+ Tregs expanded after LP-BM5 infection. Following in vivo adoptive transfer of natural Treg (nTreg)-depleted CD4+T-cells, and subsequent LP-BM5 retroviral infection, enriched monocytic MDSCs (M-MDSCs) from these nTreg-depleted mice displayed altered phenotypic subsets. In addition, M-MDSCs from LP-BM5-infected nTreg-depleted mice exhibited increased suppression of T-cell, but not B-cell, responses, compared with M-MDSCs derived from non-depleted LP-BM5-infected controls. Additionally, LP-BM5-induced M-MDSCs modulated the production of IL-10 by FoxP3+ Tregs in vitro. These collective data highlight in vitro and for the first time, to the best of our knowledge, in vivo reciprocal modulation between retroviral-induced M-MDSCs and Tregs, and may provide insight into the immunotherapeutic targeting of such regulatory cells during retroviral infection.
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Affiliation(s)
- Megan A O'Connor
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, NH 03756, USA
| | - Jennifer L Vella
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, NH 03756, USA
| | - William R Green
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, NH 03756, USA.,Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth, Lebanon, NH 03756, USA
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202
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Marvel D, Gabrilovich DI. Myeloid-derived suppressor cells in the tumor microenvironment: expect the unexpected. J Clin Invest 2015; 125:3356-64. [PMID: 26168215 DOI: 10.1172/jci80005] [Citation(s) in RCA: 771] [Impact Index Per Article: 85.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Our understanding of the role of myeloid-derived suppressor cells (MDSCs) in cancer is becoming increasingly complex. In addition to their eponymous role in suppressing immune responses, they directly support tumor growth, differentiation, and metastasis in a number of ways that are only now beginning to be appreciated. It is because of this increasingly complex role that these cells may become an important factor in the treatment of human cancer. In this Review, we discuss the most pertinent and controversial issues of MDSC biology and their role in promoting cancer progression and highlight how these cells may be used in the clinic, both as prognostic factors and as therapeutic targets.
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203
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Involvement of NO-cGMP pathway in anti-hyperalgesic effect of PDE5 inhibitor tadalafil in experimental hyperalgesia. Inflammopharmacology 2015; 23:187-94. [PMID: 26159437 DOI: 10.1007/s10787-015-0240-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Accepted: 06/23/2015] [Indexed: 12/12/2022]
Abstract
The association of elevated level of cyclic guanosine monophosphate (cGMP) with inhibition of hyperalgesia and involvement of nitric oxide (NO)-cGMP pathway in the modulation of pain perception was previously reported. Phosphodiesterases 5 (PDE5) inhibitors, sildenafil and tadalafil (TAD) used in erectile dysfunction, are known to act via the NO-cGMP pathway. TAD exerts its action by increasing the levels of intracellular cGMP. Hence, the present study investigated the effect of TAD 5, 10, or 20 mg/kg, per os (p.o.) or L-NAME 20 mg/kg, intraperitoneally (i.p.) and TAD (20 mg/kg, p.o.) in carrageenan- and diabetes-induced hyperalgesia in rats using hot plate test at 55 ± 2 °C. In carrageenan- and diabetes-induced hyperalgesia, TAD (10 and 20 mg/kg, p.o.) significantly increased paw withdrawal latencies (PWLs) as compared to the control group. L-NAME significantly decreased PWLs as compared to the normal group and aggravated the hyperalgesia. Moreover, significant difference in PWLs of L-NAME and TAD 20 was evident. Co-administration of L-NAME (20 mg/kg) with TAD (20 mg/kg) showed significant difference in PWLs as compared to the TAD (20 mg/kg), indicating L-NAME reversed and antagonized TAD-induced anti-hyperalgesia. This suggested an important role of NO-cGMP pathway in TAD-induced anti-hyperalgesic effect.
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204
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Barone I, Giordano C, Bonofiglio D, Catalano S, Andò S. Phosphodiesterase Type 5 as a Candidate Therapeutic Target in Cancers. CURRENT PATHOBIOLOGY REPORTS 2015. [DOI: 10.1007/s40139-015-0083-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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205
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Pottier C, Wheatherspoon A, Roncarati P, Longuespée R, Herfs M, Duray A, Delvenne P, Quatresooz P. The importance of the tumor microenvironment in the therapeutic management of cancer. Expert Rev Anticancer Ther 2015; 15:943-54. [PMID: 26098949 DOI: 10.1586/14737140.2015.1059279] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Tumor prognosis is generally defined by various tumor parameters. However, it is well known that paracrine, endocrine and cell-cell interactions between the tumor and its microenvironment contribute to its growth. The tumor microenvironment (TME) can also influence disease prognosis and is likely to be considered as an important prognostic factor. In addition, conventional therapies can influence the microenvironment and antitumor immunity. Similarly, the TME will influence the effectiveness of therapy. The purpose of this review is to demonstrate how TME is important in therapeutic management. Key interactions between TME and different cancer therapies as well as their current clinical consequences have been described. More research is needed to establish the important network between tumor cells and their environment to highlight their relationships with conventional therapies and develop global therapeutic strategies.
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Affiliation(s)
- Charles Pottier
- Department of Pathology, University Hospital of Liège, Liège, Belgium
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206
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Datta J, Berk E, Cintolo JA, Xu S, Roses RE, Czerniecki BJ. Rationale for a Multimodality Strategy to Enhance the Efficacy of Dendritic Cell-Based Cancer Immunotherapy. Front Immunol 2015; 6:271. [PMID: 26082780 PMCID: PMC4451636 DOI: 10.3389/fimmu.2015.00271] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 05/15/2015] [Indexed: 02/03/2023] Open
Abstract
Dendritic cells (DC), master antigen-presenting cells that orchestrate interactions between the adaptive and innate immune arms, are increasingly utilized in cancer immunotherapy. Despite remarkable progress in our understanding of DC immunobiology, as well as several encouraging clinical applications – such as DC-based sipuleucel-T for metastatic castration-resistant prostate cancer – clinically effective DC-based immunotherapy as monotherapy for a majority of tumors remains a distant goal. The complex interplay between diverse molecular and immune processes that govern resistance to DC-based vaccination compels a multimodality approach, encompassing a growing arsenal of antitumor agents which target these distinct processes and synergistically enhance DC function. These include antibody-based targeted molecular therapies, immune checkpoint inhibitors, therapies that inhibit immunosuppressive cellular elements, conventional cytotoxic modalities, and immune potentiating adjuvants. It is likely that in the emerging era of “precision” cancer therapeutics, tangible clinical benefits will only be realized with a multifaceted – and personalized – approach combining DC-based vaccination with adjunctive strategies.
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Affiliation(s)
- Jashodeep Datta
- Division of Endocrine and Oncologic Surgery, Department of Surgery, University of Pennsylvania Perelman School of Medicine , Philadelphia, PA , USA
| | - Erik Berk
- Division of Endocrine and Oncologic Surgery, Department of Surgery, University of Pennsylvania Perelman School of Medicine , Philadelphia, PA , USA
| | - Jessica A Cintolo
- Division of Endocrine and Oncologic Surgery, Department of Surgery, University of Pennsylvania Perelman School of Medicine , Philadelphia, PA , USA
| | - Shuwen Xu
- Division of Endocrine and Oncologic Surgery, Department of Surgery, University of Pennsylvania Perelman School of Medicine , Philadelphia, PA , USA
| | - Robert E Roses
- Division of Endocrine and Oncologic Surgery, Department of Surgery, University of Pennsylvania Perelman School of Medicine , Philadelphia, PA , USA
| | - Brian J Czerniecki
- Division of Endocrine and Oncologic Surgery, Department of Surgery, University of Pennsylvania Perelman School of Medicine , Philadelphia, PA , USA ; Rena Rowen Breast Center, Hospital of the University of Pennsylvania , Philadelphia, PA , USA
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207
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Hossain F, Al-Khami AA, Wyczechowska D, Hernandez C, Zheng L, Reiss K, Valle LD, Trillo-Tinoco J, Maj T, Zou W, Rodriguez PC, Ochoa AC. Inhibition of Fatty Acid Oxidation Modulates Immunosuppressive Functions of Myeloid-Derived Suppressor Cells and Enhances Cancer Therapies. Cancer Immunol Res 2015; 3:1236-47. [PMID: 26025381 DOI: 10.1158/2326-6066.cir-15-0036] [Citation(s) in RCA: 343] [Impact Index Per Article: 38.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Accepted: 05/20/2015] [Indexed: 01/28/2023]
Abstract
Myeloid-derived suppressor cells (MDSC) promote tumor growth by inhibiting T-cell immunity and promoting malignant cell proliferation and migration. The therapeutic potential of blocking MDSC in tumors has been limited by their heterogeneity, plasticity, and resistance to various chemotherapy agents. Recent studies have highlighted the role of energy metabolic pathways in the differentiation and function of immune cells; however, the metabolic characteristics regulating MDSC remain unclear. We aimed to determine the energy metabolic pathway(s) used by MDSC, establish its impact on their immunosuppressive function, and test whether its inhibition blocks MDSC and enhances antitumor therapies. Using several murine tumor models, we found that tumor-infiltrating MDSC (T-MDSC) increased fatty acid uptake and activated fatty acid oxidation (FAO). This was accompanied by an increased mitochondrial mass, upregulation of key FAO enzymes, and increased oxygen consumption rate. Pharmacologic inhibition of FAO blocked immune inhibitory pathways and functions in T-MDSC and decreased their production of inhibitory cytokines. FAO inhibition alone significantly delayed tumor growth in a T-cell-dependent manner and enhanced the antitumor effect of adoptive T-cell therapy. Furthermore, FAO inhibition combined with low-dose chemotherapy completely inhibited T-MDSC immunosuppressive effects and induced a significant antitumor effect. Interestingly, a similar increase in fatty acid uptake and expression of FAO-related enzymes was found in human MDSC in peripheral blood and tumors. These results support the possibility of testing FAO inhibition as a novel approach to block MDSC and enhance various cancer therapies.
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Affiliation(s)
- Fokhrul Hossain
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, Louisiana. Department of Biochemistry and Molecular Biology, Louisiana State University Health Sciences Center, New Orleans, Louisiana
| | - Amir A Al-Khami
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, Louisiana
| | - Dorota Wyczechowska
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, Louisiana
| | - Claudia Hernandez
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, Louisiana
| | - Liqin Zheng
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, Louisiana
| | - Krzystoff Reiss
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, Louisiana. Department of Internal Medicine, Louisiana State University Health Sciences Center, New Orleans, Louisiana
| | - Luis Del Valle
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, Louisiana. Department of Pathology, Louisiana State University Health Sciences Center, New Orleans, Louisiana
| | - Jimena Trillo-Tinoco
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, Louisiana
| | - Tomasz Maj
- Department of Surgery, University of Michigan, Ann Arbor, Michigan
| | - Weiping Zou
- Department of Surgery, University of Michigan, Ann Arbor, Michigan
| | - Paulo C Rodriguez
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, Louisiana. Department of Microbiology, Immunology and Parasitology, Louisiana State University Health Sciences Center, New Orleans, Louisiana
| | - Augusto C Ochoa
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, Louisiana. Department of Pediatrics, Louisiana State University Health Sciences Center, New Orleans, Louisiana.
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208
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Modulation of Acid Sphingomyelinase in Melanoma Reprogrammes the Tumour Immune Microenvironment. Mediators Inflamm 2015; 2015:370482. [PMID: 26101462 PMCID: PMC4460251 DOI: 10.1155/2015/370482] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Revised: 04/24/2015] [Accepted: 04/27/2015] [Indexed: 12/30/2022] Open
Abstract
The inflammatory microenvironment induces tumours to acquire an aggressive and immunosuppressive behaviour. Since acid sphingomyelinase (A-SMase) downregulation in melanoma was shown to determine a malignant phenotype, we aimed here to elucidate the role of A-SMase in the regulation of tumour immunogenic microenvironment using in vivo melanoma models in which A-SMase was either downregulated or maintained at constitutively high levels. We found high levels of inflammatory factors in low A-SMase expressing tumours, which also displayed an immunosuppressive/protumoural microenvironment: high levels of myeloid-derived suppressor cells (MDSCs) and regulatory T lymphocytes (Tregs), as well as low levels of dendritic cells (DCs). In contrast, the restoration of A-SMase in melanoma cells not only reduced tumour growth and immunosuppression, but also induced a high recruitment at tumour site of effector immune cells with an antitumoural function. Indeed, we observed a poor homing of MDSCs and Tregs and the increased recruitment of CD8+ and CD4+ T lymphocytes as well as the infiltration of DCs and CD8+/CD44high T lymphocytes. This study demonstrates that change of A-SMase expression in cancer cells is sufficient per se to tune in vivo melanoma growth and that A-SMase levels modulate immune cells at tumour site. This may be taken into consideration in the setting of therapeutic strategies.
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209
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Hossain DMS, Pal SK, Moreira D, Duttagupta P, Zhang Q, Won H, Jones J, D'Apuzzo M, Forman S, Kortylewski M. TLR9-Targeted STAT3 Silencing Abrogates Immunosuppressive Activity of Myeloid-Derived Suppressor Cells from Prostate Cancer Patients. Clin Cancer Res 2015; 21:3771-82. [PMID: 25967142 DOI: 10.1158/1078-0432.ccr-14-3145] [Citation(s) in RCA: 139] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Accepted: 04/21/2015] [Indexed: 12/31/2022]
Abstract
PURPOSE Recent advances in immunotherapy of advanced human cancers underscored the need to address and eliminate tumor immune evasion. The myeloid-derived suppressor cells (MDSC) are important inhibitors of T-cell responses in solid tumors, such as prostate cancers. However, targeting MDSCs proved challenging due to their phenotypic heterogeneity. EXPERIMENTAL DESIGN Myeloid cell populations were evaluated using flow cytometry on blood samples, functional assays, and immunohistochemical/immunofluorescent stainings on specimens from healthy subjects, localized and metastatic castration-resistant prostate cancer patients. RESULTS Here, we identify a population of Lin(-)CD15(HI)CD33(LO) granulocytic MDSCs that accumulate in patients' circulation during prostate cancer progression from localized to metastatic disease. The prostate cancer-associated MDSCs potently inhibit autologous CD8(+) T cells' proliferation and production of IFNγ and granzyme-B. The circulating MDSCs have high levels of activated STAT3, which is a central immune checkpoint regulator. The granulocytic pSTAT3(+) cells are also detectable in patients' prostate tissues. We previously generated an original strategy to silence genes specifically in Toll-like Receptor-9 (TLR9) positive myeloid cells using CpG-siRNA conjugates. We demonstrate that human granulocytic MDSCs express TLR9 and rapidly internalize naked CpG-STAT3siRNA, thereby silencing STAT3 expression. STAT3 blocking abrogates immunosuppressive effects of patients-derived MDSCs on effector CD8(+) T cells. These effects depended on reduced expression and enzymatic activity of Arginase-1, a downstream STAT3 target gene and a potent T-cell inhibitor. CONCLUSIONS Overall, we demonstrate the accumulation of granulocytic MDSCs with prostate cancer progression and the feasibility of using TLR9-targeted STAT3siRNA delivery strategy to alleviate MDSC-mediated immunosuppression.
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Affiliation(s)
- Dewan M S Hossain
- Department of Cancer Immunotherapeutics & Tumor Immunology, Beckman Research Institute at City of Hope, Duarte, California
| | - Sumanta K Pal
- Department of Medical Oncology and Experimental Therapeutics, Beckman Research Institute at City of Hope, Duarte, California.
| | - Dayson Moreira
- Department of Cancer Immunotherapeutics & Tumor Immunology, Beckman Research Institute at City of Hope, Duarte, California
| | - Priyanka Duttagupta
- Department of Cancer Immunotherapeutics & Tumor Immunology, Beckman Research Institute at City of Hope, Duarte, California
| | - Qifang Zhang
- Department of Cancer Immunotherapeutics & Tumor Immunology, Beckman Research Institute at City of Hope, Duarte, California
| | - Haejung Won
- Department of Cancer Immunotherapeutics & Tumor Immunology, Beckman Research Institute at City of Hope, Duarte, California
| | - Jeremy Jones
- Department of Cancer Biology, Beckman Research Institute at City of Hope, Duarte, California
| | - Massimo D'Apuzzo
- Department of Pathology, Beckman Research Institute at City of Hope, Duarte, California
| | - Stephen Forman
- Department of Hematology and Hematopoietic Cell Transplantation, Beckman Research Institute at City of Hope, Duarte, California
| | - Marcin Kortylewski
- Department of Cancer Immunotherapeutics & Tumor Immunology, Beckman Research Institute at City of Hope, Duarte, California.
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210
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Parker KH, Beury DW, Ostrand-Rosenberg S. Myeloid-Derived Suppressor Cells: Critical Cells Driving Immune Suppression in the Tumor Microenvironment. Adv Cancer Res 2015. [PMID: 26216631 DOI: 10.1016/bs.acr.2015.04.002] [Citation(s) in RCA: 372] [Impact Index Per Article: 41.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Myeloid-derived suppressor cells (MDSCs) are a heterogeneous population of immature myeloid cells that suppress innate and adaptive immunity. MDSCs are present in many disease settings; however, in cancer, they are a major obstacle for both natural antitumor immunity and immunotherapy. Tumor and host cells in the tumor microenvironment (TME) produce a myriad of pro-inflammatory mediators that activate MDSCs and drive their accumulation and suppressive activity. MDSCs utilize a variety of mechanisms to suppress T cell activation, induce other immune-suppressive cell populations, regulate inflammation in the TME, and promote the switching of the immune system to one that tolerates and enhances tumor growth. Because MDSCs are present in most cancer patients and are potent immune-suppressive cells, MDSCs have been the focus of intense research in recent years. This review describes the history and identification of MDSCs, the role of inflammation and intracellular signaling events governing MDSC accumulation and suppressive activity, immune-suppressive mechanisms utilized by MDSCs, and recent therapeutics that target MDSCs to enhance antitumor immunity.
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Affiliation(s)
- Katherine H Parker
- Department of Biological Sciences, University of Maryland Baltimore County, Baltimore, Maryland, USA
| | - Daniel W Beury
- Department of Biological Sciences, University of Maryland Baltimore County, Baltimore, Maryland, USA
| | - Suzanne Ostrand-Rosenberg
- Department of Biological Sciences, University of Maryland Baltimore County, Baltimore, Maryland, USA.
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211
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Di Mitri D, Toso A, Alimonti A. Molecular Pathways: Targeting Tumor-Infiltrating Myeloid-Derived Suppressor Cells for Cancer Therapy. Clin Cancer Res 2015; 21:3108-12. [PMID: 25967145 DOI: 10.1158/1078-0432.ccr-14-2261] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 04/13/2015] [Indexed: 11/16/2022]
Abstract
Tumor-infiltrating myeloid-derived suppressor cells (MDSC) are a heterogeneous and immunosuppressive cell subset that blocks the proliferation and the activity of both T and natural killer (NK) cells and promotes tumor vasculogenesis and progression. Recent evidences demonstrate that the recruitment of MDSCs in tumors also blocks senescence induced by chemotherapy promoting chemoresistance. Hence, the need of novel therapeutic approaches that can efficiently target MDSC recruitment and function in cancer. Among them, novel combinatorial treatments of chemotherapy and immunotherapy or treatments that induce depletion of MDSCs in peripheral sites should be taken in consideration.
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Affiliation(s)
- Diletta Di Mitri
- Institute of Oncology Research (IOR), Oncology Institute of Southern Switzerland, Bellinzona, Switzerland
| | - Alberto Toso
- Institute of Oncology Research (IOR), Oncology Institute of Southern Switzerland, Bellinzona, Switzerland
| | - Andrea Alimonti
- Institute of Oncology Research (IOR), Oncology Institute of Southern Switzerland, Bellinzona, Switzerland. Faculty of Biology and Medicine, University of Lausanne UNIL, Lausanne, Switzerland.
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212
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Wang Z, Cheng Q, Tang K, Sun Y, Zhang K, Zhang Y, Luo S, Zhang H, Ye D, Huang B. Lipid mediator lipoxin A4 inhibits tumor growth by targeting IL-10-producing regulatory B (Breg) cells. Cancer Lett 2015; 364:118-24. [PMID: 25979229 DOI: 10.1016/j.canlet.2015.04.030] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 04/15/2015] [Accepted: 04/15/2015] [Indexed: 12/19/2022]
Abstract
Lipoxin A4 (LXA4), an arachidonic acid-derived anti-inflammatory lipid mediator, shows anti-tumor potential by regulating tumor immune microenvironments. However, the underlying molecular and cellular basis of this function remains unclear. IL-10-producing B (Breg) cells display tumor-promoting effects by negatively regulating anti-tumor immunity. Here we show that LXA4 inhibits tumor growth by suppressing the generation of Breg cells in tumor-bearing mice. The administration of LXA4 inhibited the induction of Breg cells. Breg cell deficiency, in turn, resulted in LXA4 losing its anti-tumor properties. Intriguingly, regulatory T (Treg) cells also had a role in this process. Targeting Breg cells by LXA4 decreased the number of Treg cells in draining lymph nodes and tumor tissues as well as enhanced cytotoxic T cell activities. In addition, we further demonstrated that LXA4 inhibited Breg cells through its dephosphorylating STAT3 and ERK. These findings unveil a new anti-tumor mechanism underlying LXA4 targeting Breg cells with potential clinical applications.
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Affiliation(s)
- Zheng Wang
- Department of Biochemistry & Molecular Biology, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, China
| | - Qiong Cheng
- Department of Pathophysiology, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, China
| | - Ke Tang
- State Key Laboratory of Medical Molecular Biology & Department of Immunology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100005, China
| | - Yanling Sun
- Department of Biochemistry & Molecular Biology, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, China
| | - Keke Zhang
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yi Zhang
- State Key Laboratory of Medical Molecular Biology & Department of Immunology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100005, China
| | - Shunqun Luo
- Department of Biochemistry & Molecular Biology, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, China
| | - Huafeng Zhang
- State Key Laboratory of Medical Molecular Biology & Department of Immunology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100005, China
| | - Duyun Ye
- Department of Pathophysiology, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, China
| | - Bo Huang
- Department of Biochemistry & Molecular Biology, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, China; State Key Laboratory of Medical Molecular Biology & Department of Immunology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100005, China.
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213
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Lin D, Lei L, Zhang Y, Hu B, Bao G, Liu Y, Song Y, Liu C, Wu Y, Zhao L, Yu X, Liu H. Secreted IL-1α promotes T-cell activation and expansion of CD11b+Gr1+cells in carbon tetrachloride-induced liver injury in mice. Eur J Immunol 2015; 45:2084-98. [DOI: 10.1002/eji.201445195] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Revised: 03/05/2015] [Accepted: 04/10/2015] [Indexed: 01/28/2023]
Affiliation(s)
- Dandan Lin
- Laboratory of Cellular and Molecular Tumor Immunology; Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University; Suzhou Jiangsu China
| | - Lei Lei
- Laboratory of Cellular and Molecular Tumor Immunology; Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University; Suzhou Jiangsu China
| | - Yinsheng Zhang
- Laboratory of Cellular and Molecular Tumor Immunology; Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University; Suzhou Jiangsu China
| | - Bo Hu
- Laboratory of Cellular and Molecular Tumor Immunology; Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University; Suzhou Jiangsu China
| | - Guangming Bao
- Laboratory of Cellular and Molecular Tumor Immunology; Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University; Suzhou Jiangsu China
| | - Yonghao Liu
- Laboratory of Cellular and Molecular Tumor Immunology; Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University; Suzhou Jiangsu China
| | - Yuan Song
- Laboratory of Cellular and Molecular Tumor Immunology; Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University; Suzhou Jiangsu China
| | - Chunliang Liu
- Laboratory of Cellular and Molecular Tumor Immunology; Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University; Suzhou Jiangsu China
| | - Yan Wu
- Laboratory of Cellular and Molecular Tumor Immunology; Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University; Suzhou Jiangsu China
| | - Lixiang Zhao
- Laboratory of Cellular and Molecular Tumor Immunology; Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University; Suzhou Jiangsu China
| | - Xiao Yu
- Laboratory of Cellular and Molecular Tumor Immunology; Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University; Suzhou Jiangsu China
| | - Haiyan Liu
- Laboratory of Cellular and Molecular Tumor Immunology; Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University; Suzhou Jiangsu China
- Cyrus Tang Hematology Center; Department of Hematology, Collaborative Innovation Center of Hematology, the First Affiliated Hospital of Soochow University, Jiangsu Institute of Hematology and Key Laboratory of Thrombosis and Hemostasis Ministry of Health; Suzhou Jiangsu China
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214
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Sido JM, Yang X, Nagarkatti PS, Nagarkatti M. Δ9-Tetrahydrocannabinol-mediated epigenetic modifications elicit myeloid-derived suppressor cell activation via STAT3/S100A8. J Leukoc Biol 2015; 97:677-88. [PMID: 25713087 PMCID: PMC4370051 DOI: 10.1189/jlb.1a1014-479r] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 01/08/2015] [Accepted: 01/12/2015] [Indexed: 01/12/2023] Open
Abstract
MDSCs are potent immunosuppressive cells that are induced during inflammatory responses, as well as by cancers, to evade the anti-tumor immunity. We recently demonstrated that marijuana cannabinoids are potent inducers of MDSCs. In the current study, we investigated the epigenetic mechanisms through which THC, an exogenous cannabinoid, induces MDSCs and compared such MDSCs with the naïve MDSCs found in BM of BL6 (WT) mice. Administration of THC into WT mice caused increased methylation at the promoter region of DNMT3a and DNMT3b in THC-induced MDSCs, which correlated with reduced expression of DNMT3a and DNMT3b. Furthermore, promoter region methylation was decreased at Arg1 and STAT3 in THC-induced MDSCs, and consequently, such MDSCs expressed higher levels of Arg1 and STAT3. In addition, THC-induced MDSCs secreted elevated levels of S100A8, a calcium-binding protein associated with accumulation of MDSCs in cancer models. Neutralization of S100A8 by use of anti-S100A8 (8H150) in vivo reduced the ability of THC to trigger MDSCs. Interestingly, the elevated S100A8 expression also promoted the suppressive function of MDSCs. Together, the current study demonstrates that THC mediates epigenetic changes to promote MDSC differentiation and function and that S100A8 plays a critical role in this process.
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Affiliation(s)
- Jessica Margaret Sido
- *Department of Pathology, Microbiology, and Immunology, University of South Carolina School of Medicine, Columbia, South Carolina, USA; and WJB Dorn Veterans Affairs Medical Center, Columbia, South Carolina, USA
| | - Xiaoming Yang
- *Department of Pathology, Microbiology, and Immunology, University of South Carolina School of Medicine, Columbia, South Carolina, USA; and WJB Dorn Veterans Affairs Medical Center, Columbia, South Carolina, USA
| | - Prakash S Nagarkatti
- *Department of Pathology, Microbiology, and Immunology, University of South Carolina School of Medicine, Columbia, South Carolina, USA; and WJB Dorn Veterans Affairs Medical Center, Columbia, South Carolina, USA
| | - Mitzi Nagarkatti
- *Department of Pathology, Microbiology, and Immunology, University of South Carolina School of Medicine, Columbia, South Carolina, USA; and WJB Dorn Veterans Affairs Medical Center, Columbia, South Carolina, USA
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215
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Hirano K, Hosoi A, Matsushita H, Iino T, Ueha S, Matsushima K, Seto Y, Kakimi K. The nitric oxide radical scavenger carboxy-PTIO reduces the immunosuppressive activity of myeloid-derived suppressor cells and potentiates the antitumor activity of adoptive cytotoxic T lymphocyte immunotherapy. Oncoimmunology 2015; 4:e1019195. [PMID: 26405569 DOI: 10.1080/2162402x.2015.1019195] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 02/09/2015] [Accepted: 02/09/2015] [Indexed: 12/31/2022] Open
Abstract
Adoptive immunotherapy with cytotoxic T lymphocytes (CTLs) can result in robust and durable antitumor responses. Tumor-infiltrating CTLs produce IFNγ and mediate antitumor activity, but they simultaneously induce counter-regulatory immunosuppressive mechanisms in the tumor by recruiting monocytic myeloid-derived suppressor cells (MDSCs) that limit their proliferation and effector function. Using a murine model of adoptive immunotherapy for B16 melanoma, we developed a strategy to augment CTL activity by downregulating immunosuppression by MDSCs. Intravenous injection of transgenic pmel-1 CTLs into tumor-bearing mice, resulted in their infiltration into the tumor, but this was accompanied by the accumulation of large numbers of monocytic MDSCs (M-MDSCs). These cells hampered CTL function and reduced their numbers in the tumor. We determined that one mechanism responsible for this immunosuppression was the production of nitric oxide (NO) by MDSCs in the tumor. Therefore, mice were given the NO scavenger carboxy-PTIO (C-PTIO) on the day after CTL transfer. This led to the restoration of impaired proliferative capacity and function of the CTLs, resulting in sustained suppression of tumor growth. Thus, we conclude that CTL therapy can be improved by counter-acting immunosuppression. Targeting NO, one mediator of the immunosuppressive activity of M-MDSCs, may be an appropriate strategy to restore impaired CTL function and improve the efficacy of immunotherapy.
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Affiliation(s)
- Kosuke Hirano
- Department of Immunotherapeutics; The University of Tokyo Hospital ; Tokyo, Japan ; Department of Gastrointestinal Surgery; The University of Tokyo Hospital ; Tokyo, Japan
| | - Akihiro Hosoi
- Department of Immunotherapeutics; The University of Tokyo Hospital ; Tokyo, Japan ; Medinet Co. Ltd. ; Kanagawa, Japan
| | - Hirokazu Matsushita
- Department of Immunotherapeutics; The University of Tokyo Hospital ; Tokyo, Japan
| | - Tamaki Iino
- Department of Immunotherapeutics; The University of Tokyo Hospital ; Tokyo, Japan ; Medinet Co. Ltd. ; Kanagawa, Japan
| | - Satoshi Ueha
- Department of Molecular Preventive Medicine; Graduate School of Medicine; The University of Tokyo ; Tokyo, Japan
| | - Kouji Matsushima
- Department of Molecular Preventive Medicine; Graduate School of Medicine; The University of Tokyo ; Tokyo, Japan
| | - Yasuyuki Seto
- Department of Gastrointestinal Surgery; The University of Tokyo Hospital ; Tokyo, Japan
| | - Kazuhiro Kakimi
- Department of Immunotherapeutics; The University of Tokyo Hospital ; Tokyo, Japan
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216
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Sanders KL, Fox BA, Bzik DJ. Attenuated Toxoplasma gondii Stimulates Immunity to Pancreatic Cancer by Manipulation of Myeloid Cell Populations. Cancer Immunol Res 2015; 3:891-901. [PMID: 25804437 DOI: 10.1158/2326-6066.cir-14-0235] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 03/16/2015] [Indexed: 01/08/2023]
Abstract
Suppressive myeloid cells represent a significant barrier to the generation of productive antitumor immune responses to many solid tumors. Eliminating or reprogramming suppressive myeloid cells to abrogate tumor-associated immune suppression is a promising therapeutic approach. We asked whether treatment of established aggressive disseminated pancreatic cancer with the immunotherapeutic attenuated Toxoplasma gondii vaccine strain CPS would trigger tumor-associated myeloid cells to generate therapeutic antitumor immune responses. CPS treatment significantly decreased tumor-associated macrophages and markedly increased dendritic cell infiltration of the pancreatic tumor microenvironment. Tumor-resident macrophages and dendritic cells, particularly cells actively invaded by CPS, increased expression of costimulatory molecules CD80 and CD86 and concomitantly boosted their production of IL12. CPS treatment increased CD4(+) and CD8(+) T-cell infiltration into the tumor microenvironment, activated tumor-resident T cells, and increased IFNγ production by T-cell populations. CPS treatment provided a significant therapeutic benefit in pancreatic tumor-bearing mice. This therapeutic benefit depended on IL12 and IFNγ production, MyD88 signaling, and CD8(+) T-cell populations. Although CD4(+) T cells exhibited activated effector phenotypes and produced IFNγ, CD4(+) T cells as well as natural killer cells were not required for the therapeutic benefit. In addition, CD8(+) T cells isolated from CPS-treated tumor-bearing mice produced IFNγ after re-exposure to pancreatic tumor antigen, suggesting this immunotherapeutic treatment stimulated tumor cell antigen-specific CD8(+) T-cell responses. This work highlights the potency and immunotherapeutic efficacy of CPS treatment and demonstrates the significance of targeting tumor-associated myeloid cells as a mechanism to stimulate more effective immunity to pancreatic cancer.
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Affiliation(s)
- Kiah L Sanders
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire
| | - Barbara A Fox
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire
| | - David J Bzik
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire.
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217
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Gupta P, Wright SE, Srivastava SK. PEITC treatment suppresses myeloid derived tumor suppressor cells to inhibit breast tumor growth. Oncoimmunology 2015; 4:e981449. [PMID: 25949878 DOI: 10.4161/2162402x.2014.981449] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Accepted: 10/22/2014] [Indexed: 01/26/2023] Open
Abstract
Breast tumors are heterogeneous with a complex etiology. The immune system plays a crucial role in the development of tumors and can facilitate tumor growth pleiotropically. Myeloid derived suppressor cells (MDSCs) generate reactive oxygen species (ROS) and cytokines to suppress T cells, dendritic cells and natural killer (NK) cells. Hence, the inhibition of MDSCs could be an important strategy for anticancer therapeutics. Phenethyl isothiocyanate (PEITC), a bioactive compound present in cruciferous vegetables, is known to have anticancer properties. However, the effects of PEITC administration on the immune system have not been previously reported. In the current study, we evaluated the effects of administering PEITC to immunocompromised NOD-SCID IL2Rγ-/- (SCID/NSG) host mice bearing MDA-MB-231 xenografts on MDSCs in the peripheral blood. Our results reveal that oral administration of 12 μmol PEITC attenuated tumor growth by 76%. This was marked tumor-inhibitory phenotype was associated with a significant reduction in the levels of MDSCs bearing the surface markers CD33, CD34 and CD11b in PEITC treated mice, indicating that overall tumor growth suppression by PEITC correlates with inhibition of MDSCs. To the best of our knowledge, this is the first study showing effects of PEITC on MDSCs.
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Affiliation(s)
- Parul Gupta
- Department of Biomedical Sciences and Cancer Biology Center; Texas Tech University Health Sciences Center ; Amarillo, TX USA
| | - Stephen E Wright
- Department of Biomedical Sciences and Cancer Biology Center; Texas Tech University Health Sciences Center ; Amarillo, TX USA ; Department of Internal Medicine; Texas Tech University Health Sciences Center ; Amarillo, TX USA ; Harrington Cancer Center ; Amarillo, TX USA
| | - Sanjay K Srivastava
- Department of Biomedical Sciences and Cancer Biology Center; Texas Tech University Health Sciences Center ; Amarillo, TX USA ; Cancer Preventive Material Development Research Center; College of Korean Medicine; Department of Pathology; Kyunghee University ; Dongdaemun-ku, Seoul, South Korea
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218
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Gebremeskel S, Clattenburg DR, Slauenwhite D, Lobert L, Johnston B. Natural killer T cell activation overcomes immunosuppression to enhance clearance of postsurgical breast cancer metastasis in mice. Oncoimmunology 2015; 4:e995562. [PMID: 25949924 DOI: 10.1080/2162402x.2014.995562] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 12/02/2014] [Indexed: 12/31/2022] Open
Abstract
Metastatic lesions are responsible for over 90% of breast cancer associated deaths. Therefore, strategies that target metastasis are of particular interest. This study examined the efficacy of natural killer T (NKT) cell activation as a post-surgical immunotherapy in a mouse model of metastatic breast cancer. Following surgical resection of orthotopic 4T1 mammary carcinoma tumors, BALB/c mice were treated with NKT cell activating glycolipid antigens (α-GalCer, α-C-GalCer or OCH) or α-GalCer-loaded dendritic cells (DCs). Low doses of glycolipids transiently reduced metastasis but did not increase survival. A high dose of α-GalCer enhanced overall survival, but was associated with increased toxicity and mortality at early time points. Treatment with α-GalCer-loaded DCs limited tumor metastasis, prolonged survival, and provided curative outcomes in ∼45% of mice. However, survival was not increased further by additional DC treatments or co-transfer of expanded NKT cells. NKT cell activation via glycolipid-loaded DCs decreased the frequency and immunosuppressive activity of myeloid derived suppressor cells (MDSCs) in tumor-resected mice. In vitro, NKT cells were resistant to the immunosuppressive effects of MDSCs and were able to reverse the inhibitory effects of MDSCs on T cell proliferation. NKT cell activation enhanced antitumor immunity in tumor-resected mice, increasing 4T1-specific cytotoxic responses and IFNγ production from natural killer (NK) cells and CD8+ T cells. Consistent with increased tumor immunity, mice surviving to day 150 were resistant to a second tumor challenge. This work provides a clear rationale for manipulating NKT cells to target metastatic disease.
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Key Words
- dendritic cells
- metastatic breast cancer
- myeloid derived suppressor cells
- natural killer T cells
- tumor immunotherapy
- α-GalCer, α-galacotosylceramide; ALT, alanine aminotransferase; DC, dendritic cell; FBS, fetal bovine serum; GM-CSF, granulocyte-macrophage colony-stimulating factor; IFNγ, interferon-γ; IL, interleukin; i.p., intraperitoneal; i.v., intravenous; MDSC, myeloid derived suppressor cell; NK cell, natural killer cell; NKT cell, natural killer T cell; RPMI-1640, Roswell Park Memorial Institute medium-1640; TCR, T cell receptor; Th, T helper.
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Affiliation(s)
- Simon Gebremeskel
- Department of Microbiology & Immunology; Dalhousie University ; Halifax, Nova Scotia, Canada ; Beatrice Hunter Cancer Research Institute ; Halifax, Nova Scotia, Canada
| | - Daniel R Clattenburg
- Department of Microbiology & Immunology; Dalhousie University ; Halifax, Nova Scotia, Canada ; Beatrice Hunter Cancer Research Institute ; Halifax, Nova Scotia, Canada
| | - Drew Slauenwhite
- Department of Microbiology & Immunology; Dalhousie University ; Halifax, Nova Scotia, Canada
| | - Lynnea Lobert
- Department of Microbiology & Immunology; Dalhousie University ; Halifax, Nova Scotia, Canada ; Beatrice Hunter Cancer Research Institute ; Halifax, Nova Scotia, Canada
| | - Brent Johnston
- Department of Microbiology & Immunology; Dalhousie University ; Halifax, Nova Scotia, Canada ; Department of Pediatrics; Dalhousie University ; Halifax, Nova Scotia, Canada ; Department of Pathology; Dalhousie University ; Halifax, Nova Scotia, Canada ; Beatrice Hunter Cancer Research Institute ; Halifax, Nova Scotia, Canada
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219
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Exosomal Hsp70 mediates immunosuppressive activity of the myeloid-derived suppressor cells via phosphorylation of Stat3. Med Oncol 2015; 32:453. [PMID: 25603952 DOI: 10.1007/s12032-014-0453-2] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Accepted: 12/11/2014] [Indexed: 01/04/2023]
Abstract
Myeloid-derived suppressor cells (MDSCs), one of the main cell populations, are responsible for regulating the immune response, which accumulates in tumor-bearing mice and humans contributing to cancer development. Exosomes produced by tumor cells have been involved in tumor-associated immune suppression. However, the role of exosomes is unclear in the activation of MDSCs. Here, we have purified tumor-derived exosomes from the supernatants of Renca cell cultures. Transmission electron microscopy was used to confirm their morphology, and Western blot analysis showed that Hsp70 was rich in these isolated exosomes compared with the whole-cell lysates of Renca cells. Then, we demonstrated that there was a more powerful activity of exosomal Hsp70-mediated induction of proinflammation cytokines, tumor growth factors of MDSCs and tumor progression than exosomes pre-incubated with anti-Hsp70 antibody. Furthermore, we show that an interactive exosomal HSP70 and MDSCs determine the suppressive activity of the MDSCs via phosphorylation of Stat3 (p-Stat3). Finally, we show that exosomal Hsp70 triggers p-Stat3 in MDSCs in a TLR2-MyD88-dependent manner. Meanwhile, we also find that there is a more significant increase in the percentage of CD11b+Gr-1+ cells in the mice, which are treated with exosomal Hsp70 than that exosomes pre-incubated with anti-Hsp70 antibody. Hence, we believe that the signaling pathway activation by exosomal Hsp70 within MDSCs may be a significant target in future treatment of renal cell carcinoma.
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220
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Younos IH, Abe F, Talmadge JE. Myeloid-derived suppressor cells: their role in the pathophysiology of hematologic malignancies and potential as therapeutic targets. Leuk Lymphoma 2015; 56:2251-63. [PMID: 25407654 DOI: 10.3109/10428194.2014.987141] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Myeloid-derived suppressor cells (MDSCs) are a heterogeneous population of immature myeloid cells at various stages of differentiation/maturation that have a role in cancer induction and progression. They function as vasculogenic and immunosuppressive cells, utilizing multiple mechanisms to block both innate and adaptive anti-tumor immunity. Recently, their mechanism of action and clinical importance have been defined, and the cross-talk between myeloid cells and cancer cells has been shown to contribute to tumor induction, progression, metastasis and tolerance. In this review, we focus on the role of MDSCs in hematologic malignancies and the therapeutic approaches targeting MDSCs that are currently in clinical studies.
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Affiliation(s)
- Ibrahim H Younos
- a Department of Clinical Pharmacology , Menoufia University , Al-Minufya , Egypt.,b Department of Pharmacology and Clinical Pharmacy , College of Medicine and Health Sciences, Sultan Qaboos University , Muscat , Oman
| | - Fuminori Abe
- c SBI Pharmaceuticals Co., Ltd. , Tokyo 106-6020 , Japan
| | - James E Talmadge
- d Department of Pathology and Microbiology , Nebraska Medical Center , Omaha , NE , USA
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221
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Rieber N, Hartl D. Eat and suppress: The two-faced role of myeloid-derived suppressor cells in tuberculosis. Am J Respir Crit Care Med 2014; 190:975-7. [PMID: 25360727 DOI: 10.1164/rccm.201410-1764ed] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Nikolaus Rieber
- 1 Department of Pediatrics I University of Tübingen Tübingen, Germany
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222
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De Veirman K, Van Valckenborgh E, Lahmar Q, Geeraerts X, De Bruyne E, Menu E, Van Riet I, Vanderkerken K, Van Ginderachter JA. Myeloid-derived suppressor cells as therapeutic target in hematological malignancies. Front Oncol 2014; 4:349. [PMID: 25538893 PMCID: PMC4258607 DOI: 10.3389/fonc.2014.00349] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Accepted: 11/23/2014] [Indexed: 12/29/2022] Open
Abstract
Myeloid-derived suppressor cells (MDSC) are a heterogeneous population of immature myeloid cells that accumulate during pathological conditions such as cancer and are associated with a poor clinical outcome. MDSC expansion hampers the host anti-tumor immune response by inhibition of T cell proliferation, cytokine secretion, and recruitment of regulatory T cells. In addition, MDSC exert non-immunological functions including the promotion of angiogenesis, tumor invasion, and metastasis. Recent years, MDSC are considered as a potential target in solid tumors and hematological malignancies to enhance the effects of currently used immune modulating agents. This review focuses on the characteristics, distribution, functions, cell–cell interactions, and targeting of MDSC in hematological malignancies including multiple myeloma, lymphoma, and leukemia.
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Affiliation(s)
- Kim De Veirman
- Laboratory of Hematology and Immunology, Myeloma Center Brussels, Vrije Universiteit Brussel , Brussels , Belgium
| | - Els Van Valckenborgh
- Laboratory of Hematology and Immunology, Myeloma Center Brussels, Vrije Universiteit Brussel , Brussels , Belgium
| | - Qods Lahmar
- Laboratory of Cellular and Molecular Immunology, Vrije Universiteit Brussel , Brussels , Belgium ; Laboratory of Myeloid Cell Immunology, VIB , Brussels , Belgium
| | - Xenia Geeraerts
- Laboratory of Cellular and Molecular Immunology, Vrije Universiteit Brussel , Brussels , Belgium ; Laboratory of Myeloid Cell Immunology, VIB , Brussels , Belgium
| | - Elke De Bruyne
- Laboratory of Hematology and Immunology, Myeloma Center Brussels, Vrije Universiteit Brussel , Brussels , Belgium
| | - Eline Menu
- Laboratory of Hematology and Immunology, Myeloma Center Brussels, Vrije Universiteit Brussel , Brussels , Belgium
| | - Ivan Van Riet
- Laboratory of Hematology and Immunology, Myeloma Center Brussels, Vrije Universiteit Brussel , Brussels , Belgium
| | - Karin Vanderkerken
- Laboratory of Hematology and Immunology, Myeloma Center Brussels, Vrije Universiteit Brussel , Brussels , Belgium
| | - Jo A Van Ginderachter
- Laboratory of Cellular and Molecular Immunology, Vrije Universiteit Brussel , Brussels , Belgium ; Laboratory of Myeloid Cell Immunology, VIB , Brussels , Belgium
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223
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Botta C, Gullà A, Correale P, Tagliaferri P, Tassone P. Myeloid-derived suppressor cells in multiple myeloma: pre-clinical research and translational opportunities. Front Oncol 2014; 4:348. [PMID: 25538892 PMCID: PMC4258997 DOI: 10.3389/fonc.2014.00348] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Accepted: 11/23/2014] [Indexed: 12/31/2022] Open
Abstract
Immunosuppressive cells have been reported to play an important role in tumor-progression mainly because of their capability to promote immune-escape, angiogenesis, and metastasis. Among them, myeloid-derived suppressor cells (MDSCs) have been recently identified as immature myeloid cells, induced by tumor-associated inflammation, able to impair both innate and adaptive immunity. While murine MDSCs are usually identified by the expression of CD11b and Gr1, human MDSCs represent a more heterogeneous population characterized by the expression of CD33 and CD11b, low or no HLA-DR, and variable CD14 and CD15. In particular, the last two may alternatively identify monocyte-like or granulocyte-like MDSC subsets with different immunosuppressive properties. Recently, a substantial increase of MDSCs has been found in peripheral blood and bone marrow (BM) of multiple myeloma (MM) patients with a role in disease progression and/or drug resistance. Pre-clinical models recapitulating the complexity of the MM-related BM microenvironment (BMM) are major tools for the study of the interactions between MM cells and cells of the BMM (including MDSCs) and for the development of new agents targeting MM-associated immune-suppressive cells. This review will focus on current strategies for human MDSCs generation and investigation of their immunosuppressive function in vitro and in vivo, taking into account the relevant relationship occurring within the MM–BMM. We will then provide trends in MDSC-associated research and suggest potential application for the treatment of MM.
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Affiliation(s)
- Cirino Botta
- Department of Experimental and Clinical Medicine, "Magna Graecia" University and Medical Oncology Unit, T. Campanella Cancer Center, "Salvatore Venuta" University Campus , Catanzaro , Italy
| | - Annamaria Gullà
- Department of Experimental and Clinical Medicine, "Magna Graecia" University and Medical Oncology Unit, T. Campanella Cancer Center, "Salvatore Venuta" University Campus , Catanzaro , Italy
| | | | - Pierosandro Tagliaferri
- Department of Experimental and Clinical Medicine, "Magna Graecia" University and Medical Oncology Unit, T. Campanella Cancer Center, "Salvatore Venuta" University Campus , Catanzaro , Italy
| | - Pierfrancesco Tassone
- Department of Experimental and Clinical Medicine, "Magna Graecia" University and Medical Oncology Unit, T. Campanella Cancer Center, "Salvatore Venuta" University Campus , Catanzaro , Italy ; Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University , Philadelphia, PA , USA
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224
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Lalani AI, Moore CR, Luo C, Kreider BZ, Liu Y, Morse HC, Xie P. Myeloid cell TRAF3 regulates immune responses and inhibits inflammation and tumor development in mice. THE JOURNAL OF IMMUNOLOGY 2014; 194:334-48. [PMID: 25422508 DOI: 10.4049/jimmunol.1401548] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Myeloid cells, including granulocytes, monocytes, macrophages, and dendritic cells, are crucial players in innate immunity and inflammation. These cells constitutively or inducibly express a number of receptors of the TNFR and TLR families, whose signals are transduced by TNFR-associated factor (TRAF) molecules. In vitro studies showed that TRAF3 is required for TLR-induced type I IFN production, but the in vivo function of TRAF3 in myeloid cells remains unknown. In this article, we report the generation and characterization of myeloid cell-specific TRAF3-deficient (M-TRAF3(-/-)) mice, which allowed us to gain insights into the in vivo functions of TRAF3 in myeloid cells. We found that TRAF3 ablation did not affect the maturation or homeostasis of myeloid cells in young adult mice, even though TRAF3-deficient macrophages and neutrophils exhibited constitutive NF-κB2 activation. However, in response to injections with LPS (a bacterial mimic) or polyinosinic-polycytidylic acid (a viral mimic), M-TRAF3(-/-) mice exhibited an altered profile of cytokine production. M-TRAF3(-/-) mice immunized with T cell-independent and -dependent Ags displayed elevated T cell-independent IgG3 and T cell-dependent IgG2b responses. Interestingly, 15- to 22-mo-old M-TRAF3(-/-) mice spontaneously developed chronic inflammation or tumors, often affecting multiple organs. Taken together, our findings indicate that TRAF3 expressed in myeloid cells regulates immune responses in myeloid cells and acts to inhibit inflammation and tumor development in mice.
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Affiliation(s)
- Almin I Lalani
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ 08854; Graduate Program in Cellular and Molecular Pharmacology, Rutgers University, Piscataway, NJ 08854
| | - Carissa R Moore
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ 08854
| | - Chang Luo
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ 08854
| | - Benjamin Z Kreider
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ 08854
| | - Yan Liu
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ 08854
| | - Herbert C Morse
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD 20852; and
| | - Ping Xie
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ 08854; Rutgers Cancer Institute of New Jersey, New Brunswick, NJ 08903
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225
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Immune effects of bevacizumab: killing two birds with one stone. CANCER MICROENVIRONMENT 2014; 8:15-21. [PMID: 25326055 DOI: 10.1007/s12307-014-0160-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Accepted: 10/14/2014] [Indexed: 12/31/2022]
Abstract
Angiogenesis or new vessel formation is essential for tumour growth and progression. Therefore, targeting angiogenesis has been an attractive strategy in the treatment ofcancer. Bevacizumab is a recombinant humanized monoclonal IgG1 antibody thattargets vascular endothelial growth factor-A (VEGF-A) - a key molecular player inangiogenesis. Bevacizumumab has shown clinical efficacy in phase III clinical trials inseveral advanced solid malignancies. The clinical efficacy of bevacizumumab isprimarily due to its antiangiogenic effects; however, there are direct antitumor effectsand immunomodulatory effects. Enhancing the immune system to restore itsantitumour activity has been utilized successfully in clinical setting. In this article we willdiscuss the possible immunomodulatory effects of the most clinically usedantiangiogenic agent; bevacizumumab.
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226
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Arumugam A, Weng Z, Chaudhary SC, Afaq F, Elmets CA, Athar M. Keratin-6 driven ODC expression to hair follicle keratinocytes enhances stemness and tumorigenesis by negatively regulating Notch. Biochem Biophys Res Commun 2014; 451:394-401. [PMID: 25094045 DOI: 10.1016/j.bbrc.2014.07.129] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Accepted: 07/28/2014] [Indexed: 12/18/2022]
Abstract
Over-expression of ornithine decarboxylase (ODC) is known to be involved in the epidermal carcinogenesis. However, the mechanism by which it enhances skin carcinogenesis remains undefined. Recently, role of stem cells localized in various epidermal compartments has been shown in the pathogenesis of skin cancer. To direct ODC expression in distinct epidermal compartments, we have developed keratin 6 (K6)-ODC/SKH-1 and keratin 14 (K14)-ODC/SKH-1 mice and employed them to investigate the role of ODC directed to these epidermal compartments on UVB-induced carcinogenesis. K6-driven ODC over-expression directed to outer root sheath (ORS) of hair follicle was more effective in augmenting tumorigenesis as compared to mice where K14-driven ODC expression was directed to inter-follicular epidermal keratinocytes. Chronically UVB-irradiated K6-ODC/SKH-1 developed 15±2.5 tumors/mouse whereas K14-ODC/SKH-1 developed only 6.8±1.5 tumors/mouse. K6-ODC/SKH-1 showed augmented UVB-induced proliferation and much higher pro-inflammatory responses than K14-ODC/SKH-1 mice. Tumors induced in K6-ODC/SKH-1 were rapidly growing, invasive and ulcerative squamous cell carcinoma (SCC) showing decreased expression of epidermal polarity marker E-cadherin and enhanced mesenchymal marker, fibronectin. Interestingly, the number of CD34/CK15/p63 positive stem-like cells was significantly higher in chronically UVB-irradiated K6-ODC/SKH-1 as compared to K14-ODC/SKH-1 mice. Reduced Notch1 expression was correlated with the expansion of stem cell compartment in these animals. However, other signaling pathways such as DNA damage response or mTOR signaling pathways were not significantly different in tumors induced in these two murine models suggesting the specificity of Notch pathway in this regard. These data provide a novel role of ODC in augmenting tumorigenesis via negatively regulated Notch-mediated expansion of stem cell compartment.
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Affiliation(s)
- Aadithya Arumugam
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL 35294-0019, USA
| | - Zhiping Weng
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL 35294-0019, USA
| | - Sandeep C Chaudhary
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL 35294-0019, USA
| | - Farrukh Afaq
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL 35294-0019, USA
| | - Craig A Elmets
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL 35294-0019, USA; Skin Diseases Research Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Mohammad Athar
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL 35294-0019, USA; Skin Diseases Research Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
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227
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Abstract
Low oxygen tension, hypoxia, is a characteristic of many tumors and associated with the poor prognosis. Hypoxia invites bone marrow derived cells (BMDCs) from bone marrow to the site of tumor. These recruited CXCR4+ BMDCs provide favorable environment for the tumor growth by acquiring pro-angiogenic phenotype such as CD45+VEGFR2+ Endothelial Progenitor Cells (EPC), or CD45+Tie2+ myeloid cells. CD11b+CD13+ myeloid population of the BMDCs modulate tumor progression. These myeloid populations retain immunosuppressive characteristics, for example, myeloid derived suppressor cells (MDSCs), and regulates immune- suppression by inhibiting cytotoxic T cell function. In addition, MDSCs were observed at the premetastatic niche of the distant organs in other tumors. Protumorigenic and prometastatic role of the myeloid cells provides a basis for therapeutic targeting of immunosuppression and thus inhibiting tumor development and metastasis.
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Affiliation(s)
- B R Achyut
- Tumor Angiogenesis Lab, Biochemistry and Molecular Biology Department, Cancer Center, Georgia Regents University, USA
| | - Ali S Arbab
- Tumor Angiogenesis Lab, Biochemistry and Molecular Biology Department, Cancer Center, Georgia Regents University, USA
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228
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Immunological dysregulation in multiple myeloma microenvironment. BIOMED RESEARCH INTERNATIONAL 2014; 2014:198539. [PMID: 25013764 PMCID: PMC4071780 DOI: 10.1155/2014/198539] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Accepted: 05/20/2014] [Indexed: 12/22/2022]
Abstract
Multiple Myeloma (MM) is a systemic hematologic disease due to uncontrolled proliferation of monoclonal plasma cells (PC) in bone marrow (BM). Emerging in other solid and liquid cancers, the host immune system and the microenvironment have a pivotal role for PC growth, proliferation, survival, migration, and resistance to drugs and are responsible for some clinical manifestations of MM. In MM, microenvironment is represented by the cellular component of a normal bone marrow together with extracellular matrix proteins, adhesion molecules, cytokines, and growth factors produced by both stromal cells and PC themselves. All these components are able to protect PC from cytotoxic effect of chemo- and radiotherapy. This review is focused on the role of immunome to sustain MM progression, the emerging role of myeloid derived suppressor cells, and their potential clinical implications as novel therapeutic target.
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229
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Denies S, Cicchelero L, Van Audenhove I, Sanders NN. Combination of interleukin-12 gene therapy, metronomic cyclophosphamide and DNA cancer vaccination directs all arms of the immune system towards tumor eradication. J Control Release 2014; 187:175-82. [PMID: 24887014 DOI: 10.1016/j.jconrel.2014.05.045] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 05/15/2014] [Accepted: 05/23/2014] [Indexed: 11/29/2022]
Abstract
In this work a combination therapy that acts upon the immune suppressive, the innate and specific arms of the immune system is proposed. This combination therapy, which consists of intratumoral interleukin-12 (IL-12) gene therapy, human tyrosinase (hTyr) DNA vaccination and metronomic cyclophosphamide (CPX), was evaluated in a B16-F10 mouse model. The following groups were compared: (1) no treatment, (2) control vector, (3) intratumoral IL-12 gene therapy, (4) intratumoral IL-12 gene therapy+metronomic CPX, (5) intratumoral IL-12 gene therapy+metronomic CPX+hTyr DNA vaccination. Next to clinical efficacy and safety, we characterized acute effects of IL-12 and anti-tumor immune response after a second tumor challenge. All treatment groups showed increased survival and higher cure rates than control groups. Survival of non-cured mice was increased when metronomic CPX was combined with IL-12 gene therapy. Furthermore, mice that received metronomic CPX had significantly lower percentages of regulatory T cells. Addition of the hTyr DNA vaccine increased cure rate and resulted in increased survival compared to other treatment groups. We also demonstrated that the manifest necrosis within days after IL-12 gene therapy is at least partly due to IL-12 mediated activation of NK cells. All cured mice were resistant to a second challenge. A humoral memory response against the tumor cells was observed in all groups that received IL-12 gene therapy, while a cellular memory response was observed only in the vaccinated mice. In conclusion, every component of this combination treatment contributed a unique immunologic trait with associated clinical benefits.
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Affiliation(s)
- Sofie Denies
- Laboratory of Gene Therapy, Department of Nutrition, Genetics and Ethology, Faculty of Veterinary Medicine, Ghent University, Heidestraat 19, B-9820 Merelbeke, Belgium
| | - Laetitia Cicchelero
- Laboratory of Gene Therapy, Department of Nutrition, Genetics and Ethology, Faculty of Veterinary Medicine, Ghent University, Heidestraat 19, B-9820 Merelbeke, Belgium
| | - Isabel Van Audenhove
- Department of Biochemistry, Faculty of Medicine and Health Sciences, Ghent University, Albert Baertsoenkaai 3, B-9000 Gent, Belgium
| | - Niek N Sanders
- Laboratory of Gene Therapy, Department of Nutrition, Genetics and Ethology, Faculty of Veterinary Medicine, Ghent University, Heidestraat 19, B-9820 Merelbeke, Belgium.
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230
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Raval RR, Sharabi AB, Walker AJ, Drake CG, Sharma P. Tumor immunology and cancer immunotherapy: summary of the 2013 SITC primer. J Immunother Cancer 2014; 2:14. [PMID: 24883190 PMCID: PMC4039332 DOI: 10.1186/2051-1426-2-14] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Accepted: 04/10/2014] [Indexed: 01/05/2023] Open
Abstract
Knowledge of the basic mechanisms of the immune system as it relates to cancer has been increasing rapidly. These developments have accelerated the translation of these advancements into medical breakthroughs for many cancer patients. The immune system is designed to discriminate between self and non-self, and through genetic recombination there is virtually no limit to the number of antigens it can recognize. Thus, mutational events, translocations, and other genetic abnormalities within cancer cells may be distinguished as “altered-self” and these differences may play an important role in preventing the development or progression of cancer. However, tumors may utilize a variety of mechanisms to evade the immune system as well. Cancer biologists are aiming to both better understand the relationship between tumors and the normal immune system, and to look for ways to alter the playing field for cancer immunotherapy. Summarized in this review are discussions from the 2013 SITC Primer, which focused on reviewing current knowledge and future directions of research related to tumor immunology and cancer immunotherapy, including sessions on innate immunity, adaptive immunity, therapeutic approaches (dendritic cells, adoptive T cell therapy, anti-tumor antibodies, cancer vaccines, and immune checkpoint blockade), challenges to driving an anti-tumor immune response, monitoring immune responses, and the future of immunotherapy clinical trial design.
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Affiliation(s)
- Raju R Raval
- Department of Radiation Oncology & Molecular Radiation Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Andrew B Sharabi
- Department of Radiation Oncology & Molecular Radiation Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Amanda J Walker
- Department of Radiation Oncology & Molecular Radiation Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Charles G Drake
- Department of Medical Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA ; The Brady Urological Institute, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Padmanee Sharma
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA ; Department of Immunology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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