1
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Wang H, Liu S, Zhan J, Liang Y, Zeng X. Shaping the immune-suppressive microenvironment on tumor-associated myeloid cells through tumor-derived exosomes. Int J Cancer 2024; 154:2031-2042. [PMID: 38500385 DOI: 10.1002/ijc.34921] [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] [Received: 10/11/2023] [Revised: 02/07/2024] [Accepted: 02/23/2024] [Indexed: 03/20/2024]
Abstract
Tumor-associated myeloid cells (TAMCs) play a crucial role in orchestrating the dynamics of the tumor immune microenvironment. This heterogeneous population encompasses myeloid-derived suppressor cells, tumor-associated macrophages and dendritic cells, all of which contribute to the establishment of an immunosuppressive milieu that fosters tumor progression. Tumor-derived exosomes (TEXs), small extracellular vesicles secreted by tumor cells, have emerged as central mediators in intercellular communication within the tumor microenvironment. In this comprehensive review, we explore the intricate mechanisms through which TEXs modulate immune-suppressive effects on TAMCs and their profound implications in cancer progression. We delve into the multifaceted ways in which TEXs influence TAMC functions, subsequently affecting tumor immune evasion. Furthermore, we elucidate various therapeutic strategies aimed at targeting TEX-mediated immune suppression, with the ultimate goal of bolstering antitumor immunity.
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Affiliation(s)
- Hongmei Wang
- Department of Pathology, Medical College, Jinhua Polytechnic, Jinhua, China
- Department of Pathophysiology, School of Basic Medical Sciences, Nanchang University, Nanchang, China
| | - Shanshan Liu
- Department of Pathophysiology, School of Basic Medical Sciences, Nanchang University, Nanchang, China
| | - Jianhao Zhan
- Department of Pathophysiology, School of Basic Medical Sciences, Nanchang University, Nanchang, China
- Department of Clinical Medcine, HuanKui Academy, Nanchang University, Nanchang, China
| | - Yuqing Liang
- Department of Pathophysiology, School of Basic Medical Sciences, Nanchang University, Nanchang, China
| | - Xiaoping Zeng
- Department of Pathology, Medical College, Jinhua Polytechnic, Jinhua, China
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2
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Zhang W, Ou M, Yang P, Ning M. The role of extracellular vesicle immune checkpoints in cancer. Clin Exp Immunol 2024; 216:230-239. [PMID: 38518192 PMCID: PMC11097917 DOI: 10.1093/cei/uxae026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 02/02/2024] [Accepted: 03/21/2024] [Indexed: 03/24/2024] Open
Abstract
Immune checkpoints (ICPs) play a crucial role in regulating the immune response. In the tumor, malignant cells can hijack the immunosuppressive effects of inhibitory ICPs to promote tumor progression. Extracellular vesicles (EVs) are produced by a variety of cells and contain bioactive molecules on their surface or within their lumen. The expression of ICPs has also been detected in EVs. In vitro and in vivo studies have shown that extracellular vesicle immune checkpoints (EV ICPs) have immunomodulatory effects and are involved in tumor immunity. EV ICPs isolated from the peripheral blood of cancer patients are closely associated with the tumor progression and the prognosis of cancer patients. Blocking inhibitory ICPs has been recognized as an effective strategy in cancer treatment. However, the efficacy of immune checkpoint inhibitors (ICIs) in cancer treatment is hindered by the emergence of therapeutic resistance, which limits their widespread use. Researchers have demonstrated that EV ICPs are correlated with clinical response to ICIs therapy and were involved in therapeutic resistance. Therefore, it is essential to investigate the immunomodulatory effects, underlying mechanisms, and clinical significance of EV ICPs in cancer. This review aims to comprehensively explore these aspects. We have provided a comprehensive description of the cellular origins, immunomodulatory effects, and clinical significance of EV ICPs in cancer, based on relevant studies.
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Affiliation(s)
- Weiming Zhang
- Department of Laboratory Medicine, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China
| | - Mingrong Ou
- Department of Laboratory Medicine, Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University, Nanjing Jiangsu, China
| | - Ping Yang
- Department of Laboratory Medicine, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China
| | - Mingzhe Ning
- Department of Laboratory Medicine, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China
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3
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Cela I, Capone E, Trevisi G, Sala G. Extracellular vesicles in glioblastoma: Biomarkers and therapeutic tools. Semin Cancer Biol 2024; 101:25-43. [PMID: 38754752 DOI: 10.1016/j.semcancer.2024.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 03/19/2024] [Accepted: 04/30/2024] [Indexed: 05/18/2024]
Abstract
Glioblastoma (GBM) is the most aggressive tumor among the gliomas and intracranial tumors and to date prognosis for GBM patients remains poor, with a median survival typically measured in months to a few years depending on various factors. Although standardized therapies are routinely employed, it is clear that these strategies are unable to cope with heterogeneity and invasiveness of GBM. Furthermore, diagnosis and monitoring of responses to therapies are directly dependent on tissue biopsies or magnetic resonance imaging (MRI) techniques. From this point of view, liquid biopsies are arising as key sources of a variety of biomarkers with the advantage of being easily accessible and monitorable. In this context, extracellular vesicles (EVs), physiologically shed into body fluids by virtually all cells, are gaining increasing interest both as natural carriers of biomarkers and as specific signatures even for GBM. What makes these vesicles particularly attractive is they are also emerging as therapeutical vehicles to treat GBM given their native ability to cross the blood-brain barrier (BBB). Here, we reviewed recent advances on the use of EVs as biomarker for liquid biopsy and nanocarriers for targeted delivery of anticancer drugs in glioblastoma.
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Affiliation(s)
- Ilaria Cela
- Department of Innovative Technologies in Medicine & Dentistry, University "G. D'Annunzio" of Chieti-Pescara, Chieti, Italy; Center for Advanced Studies and Technology (CAST), University "G. D'Annunzio" of Chieti-Pescara, Chieti, Italy
| | - Emily Capone
- Department of Innovative Technologies in Medicine & Dentistry, University "G. D'Annunzio" of Chieti-Pescara, Chieti, Italy; Center for Advanced Studies and Technology (CAST), University "G. D'Annunzio" of Chieti-Pescara, Chieti, Italy
| | - Gianluca Trevisi
- Department of Neurosciences, Imaging and Clinical Sciences, "G. D'Annunzio" University, Chieti, Italy; Neurosurgical Unit, Santo Spirito Hospital, Pescara 65121, Italy
| | - Gianluca Sala
- Department of Innovative Technologies in Medicine & Dentistry, University "G. D'Annunzio" of Chieti-Pescara, Chieti, Italy; Center for Advanced Studies and Technology (CAST), University "G. D'Annunzio" of Chieti-Pescara, Chieti, Italy.
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4
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Lin H, Liu C, Hu A, Zhang D, Yang H, Mao Y. Understanding the immunosuppressive microenvironment of glioma: mechanistic insights and clinical perspectives. J Hematol Oncol 2024; 17:31. [PMID: 38720342 PMCID: PMC11077829 DOI: 10.1186/s13045-024-01544-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Accepted: 04/10/2024] [Indexed: 05/12/2024] Open
Abstract
Glioblastoma (GBM), the predominant and primary malignant intracranial tumor, poses a formidable challenge due to its immunosuppressive microenvironment, thereby confounding conventional therapeutic interventions. Despite the established treatment regimen comprising surgical intervention, radiotherapy, temozolomide administration, and the exploration of emerging modalities such as immunotherapy and integration of medicine and engineering technology therapy, the efficacy of these approaches remains constrained, resulting in suboptimal prognostic outcomes. In recent years, intensive scrutiny of the inhibitory and immunosuppressive milieu within GBM has underscored the significance of cellular constituents of the GBM microenvironment and their interactions with malignant cells and neurons. Novel immune and targeted therapy strategies have emerged, offering promising avenues for advancing GBM treatment. One pivotal mechanism orchestrating immunosuppression in GBM involves the aggregation of myeloid-derived suppressor cells (MDSCs), glioma-associated macrophage/microglia (GAM), and regulatory T cells (Tregs). Among these, MDSCs, though constituting a minority (4-8%) of CD45+ cells in GBM, play a central component in fostering immune evasion and propelling tumor progression, angiogenesis, invasion, and metastasis. MDSCs deploy intricate immunosuppressive mechanisms that adapt to the dynamic tumor microenvironment (TME). Understanding the interplay between GBM and MDSCs provides a compelling basis for therapeutic interventions. This review seeks to elucidate the immune regulatory mechanisms inherent in the GBM microenvironment, explore existing therapeutic targets, and consolidate recent insights into MDSC induction and their contribution to GBM immunosuppression. Additionally, the review comprehensively surveys ongoing clinical trials and potential treatment strategies, envisioning a future where targeting MDSCs could reshape the immune landscape of GBM. Through the synergistic integration of immunotherapy with other therapeutic modalities, this approach can establish a multidisciplinary, multi-target paradigm, ultimately improving the prognosis and quality of life in patients with GBM.
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Affiliation(s)
- Hao Lin
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, People's Republic of China
- National Center for Neurological Disorders, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
- Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, Shanghai Clinical Medical Center of Neurosurgery, Neurosurgical Institute of Fudan University, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| | - Chaxian Liu
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, People's Republic of China
- National Center for Neurological Disorders, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
- Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, Shanghai Clinical Medical Center of Neurosurgery, Neurosurgical Institute of Fudan University, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| | - Ankang Hu
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, People's Republic of China
- National Center for Neurological Disorders, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
- Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, Shanghai Clinical Medical Center of Neurosurgery, Neurosurgical Institute of Fudan University, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| | - Duanwu Zhang
- Children's Hospital of Fudan University, and Shanghai Key Laboratory of Medical Epigenetics, International Co-Laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, People's Republic of China.
| | - Hui Yang
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, People's Republic of China.
- Institute for Translational Brain Research, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China.
- National Center for Neurological Disorders, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China.
- Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, Shanghai Clinical Medical Center of Neurosurgery, Neurosurgical Institute of Fudan University, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China.
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China.
| | - Ying Mao
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, People's Republic of China.
- National Center for Neurological Disorders, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China.
- Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, Shanghai Clinical Medical Center of Neurosurgery, Neurosurgical Institute of Fudan University, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China.
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China.
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5
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Lu MM, Yang Y. Exosomal PD-L1 in cancer and other fields: recent advances and perspectives. Front Immunol 2024; 15:1395332. [PMID: 38726017 PMCID: PMC11079227 DOI: 10.3389/fimmu.2024.1395332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Accepted: 04/15/2024] [Indexed: 05/12/2024] Open
Abstract
PD-1/PD-L1 signaling is a key factor of local immunosuppression in the tumor microenvironment. Immune checkpoint inhibitors targeting PD-1/PD-L1 signaling have achieved tremendous success in clinic. However, several types of cancer are particularly refractory to the anti-PD-1/PD-L1 treatment. Recently, a series of studies reported that IFN-γ can stimulate cancer cells to release exosomal PD-L1 (exoPD-L1), which possesses the ability to suppress anticancer immune responses and is associated with anti-PD-1 response. In this review, we introduce the PD-1/PD-L1 signaling, including the so-called 'reverse signaling'. Furthermore, we summarize the immune treatments of cancers and pay more attention to immune checkpoint inhibitors targeting PD-1/PD-L1 signaling. Additionally, we review the action mechanisms and regulation of exoPD-L1. We also introduce the function of exoPD-L1 as biomarkers. Finally, we review the methods for analyzing and quantifying exoPD-L1, the therapeutic strategies targeting exoPD-L1 to enhance immunotherapy and the roles of exoPD-L1 beyond cancer. This comprehensive review delves into recent advances of exoPD-L1 and all these findings suggest that exoPD-L1 plays an important role in both cancer and other fields.
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Affiliation(s)
- Man-Man Lu
- Center for Reproductive Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Yu Yang
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
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6
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Yang X, Wang W, Ji T. Metabolic remodeling by the PD-L1 inhibitor BMS-202 significantly inhibits cell malignancy in human glioblastoma. Cell Death Dis 2024; 15:186. [PMID: 38438374 PMCID: PMC10912212 DOI: 10.1038/s41419-024-06553-5] [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] [Received: 08/08/2023] [Revised: 02/03/2024] [Accepted: 02/12/2024] [Indexed: 03/06/2024]
Abstract
Recently, crystallographic studies have demonstrated that BMS-202, a small-molecule compound characterized by a methoxy-1-pyridine chemical structure, exhibits a high affinity to PD-L1 dimerization. However, its roles and mechanisms in glioblastoma (GBM) remain unclear. The objective of this study is to investigate the antitumor activity of BMS-202 and its underlying mechanisms in GBM using multi-omics and bioinformatics techniques, along with a majority of in vitro and in vivo experiments, including CCK-8 assays, flow cytometry, co-immunoprecipitation, siRNA transfection, PCR, western blotting, cell migration/invasion assays and xenografts therapeutic assays. Our findings indicate that BMS-202 apparently inhibits the proliferation of GBM cells both in vitro and in vivo. Besides, it functionally blocks cell migration and invasion in vitro. Mechanistically, it reduces the expression of PD-L1 on the surface of GBM cells and interrupts the PD-L1-AKT-BCAT1 axis independent of mTOR signaling. Taken together, we conclude that BMS-202 is a promising therapeutic candidate for patients with GBM by remodeling their cell metabolism regimen, thus leading to better survival.
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Affiliation(s)
- Xueou Yang
- School of Medicine, Xiamen University, Xiamen, 361003, China
- College of Life Sciences, Guizhou Normal University, 550025, Guiyang, China
| | - Wenjun Wang
- School of Medicine, Xiamen University, Xiamen, 361003, China
| | - Tianhai Ji
- School of Medicine, Xiamen University, Xiamen, 361003, China.
- Department of Pathology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China.
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7
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Obrador E, Moreno-Murciano P, Oriol-Caballo M, López-Blanch R, Pineda B, Gutiérrez-Arroyo JL, Loras A, Gonzalez-Bonet LG, Martinez-Cadenas C, Estrela JM, Marqués-Torrejón MÁ. Glioblastoma Therapy: Past, Present and Future. Int J Mol Sci 2024; 25:2529. [PMID: 38473776 DOI: 10.3390/ijms25052529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Revised: 02/10/2024] [Accepted: 02/16/2024] [Indexed: 03/14/2024] Open
Abstract
Glioblastoma (GB) stands out as the most prevalent and lethal form of brain cancer. Although great efforts have been made by clinicians and researchers, no significant improvement in survival has been achieved since the Stupp protocol became the standard of care (SOC) in 2005. Despite multimodality treatments, recurrence is almost universal with survival rates under 2 years after diagnosis. Here, we discuss the recent progress in our understanding of GB pathophysiology, in particular, the importance of glioma stem cells (GSCs), the tumor microenvironment conditions, and epigenetic mechanisms involved in GB growth, aggressiveness and recurrence. The discussion on therapeutic strategies first covers the SOC treatment and targeted therapies that have been shown to interfere with different signaling pathways (pRB/CDK4/RB1/P16ink4, TP53/MDM2/P14arf, PI3k/Akt-PTEN, RAS/RAF/MEK, PARP) involved in GB tumorigenesis, pathophysiology, and treatment resistance acquisition. Below, we analyze several immunotherapeutic approaches (i.e., checkpoint inhibitors, vaccines, CAR-modified NK or T cells, oncolytic virotherapy) that have been used in an attempt to enhance the immune response against GB, and thereby avoid recidivism or increase survival of GB patients. Finally, we present treatment attempts made using nanotherapies (nanometric structures having active anti-GB agents such as antibodies, chemotherapeutic/anti-angiogenic drugs or sensitizers, radionuclides, and molecules that target GB cellular receptors or open the blood-brain barrier) and non-ionizing energies (laser interstitial thermal therapy, high/low intensity focused ultrasounds, photodynamic/sonodynamic therapies and electroporation). The aim of this review is to discuss the advances and limitations of the current therapies and to present novel approaches that are under development or following clinical trials.
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Affiliation(s)
- Elena Obrador
- Scientia BioTech S.L., 46002 Valencia, Spain
- Department of Physiology, Faculty of Medicine and Odontology, University of Valencia, 46010 Valencia, Spain
| | | | - María Oriol-Caballo
- Scientia BioTech S.L., 46002 Valencia, Spain
- Department of Physiology, Faculty of Medicine and Odontology, University of Valencia, 46010 Valencia, Spain
| | - Rafael López-Blanch
- Scientia BioTech S.L., 46002 Valencia, Spain
- Department of Physiology, Faculty of Medicine and Odontology, University of Valencia, 46010 Valencia, Spain
| | - Begoña Pineda
- Department of Physiology, Faculty of Medicine and Odontology, University of Valencia, 46010 Valencia, Spain
| | | | - Alba Loras
- Department of Medicine, Jaume I University of Castellon, 12071 Castellon, Spain
| | - Luis G Gonzalez-Bonet
- Department of Neurosurgery, Castellon General University Hospital, 12004 Castellon, Spain
| | | | - José M Estrela
- Scientia BioTech S.L., 46002 Valencia, Spain
- Department of Physiology, Faculty of Medicine and Odontology, University of Valencia, 46010 Valencia, Spain
- Department of Physiology, Faculty of Pharmacy, University of Valencia, 46100 Burjassot, Spain
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8
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Schweiger MW, Amoozgar Z, Repiton P, Morris R, Maksoud S, Hla M, Zaniewski E, Noske DP, Haas W, Breyne K, Tannous BA. Glioblastoma extracellular vesicles modulate immune PD-L1 expression in accessory macrophages upon radiotherapy. iScience 2024; 27:108807. [PMID: 38303726 PMCID: PMC10831876 DOI: 10.1016/j.isci.2024.108807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 11/10/2023] [Accepted: 01/02/2024] [Indexed: 02/03/2024] Open
Abstract
Glioblastoma (GBM) is the most aggressive brain tumor, presenting major challenges due to limited treatment options. Standard care includes radiation therapy (RT) to curb tumor growth and alleviate symptoms, but its impact on GBM is limited. In this study, we investigated the effect of RT on immune suppression and whether extracellular vesicles (EVs) originating from GBM and taken up by the tumor microenvironment (TME) contribute to the induced therapeutic resistance. We observed that (1) ionizing radiation increases immune-suppressive markers on GBM cells, (2) macrophages exacerbate immune suppression in the TME by increasing PD-L1 in response to EVs derived from GBM cells which is further modulated by RT, and (3) RT increases CD206-positive macrophages which have the most potential in inducing a pro-oncogenic environment due to their increased uptake of tumor-derived EVs. In conclusion, RT affects GBM resistance by immuno-modulating EVs taken up by myeloid cells in the TME.
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Affiliation(s)
- Markus W. Schweiger
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA
- Neuroscience Program, Harvard Medical School, Boston, MA 02129, USA
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Neurosurgery, 1081 HV Amsterdam, the Netherlands
- Cancer Center Amsterdam, Brain Tumor Center and Liquid Biopsy Center, 1081 HV Amsterdam, the Netherlands
| | - Zohreh Amoozgar
- Department of Radiation Oncology, Edwin L. Steele Laboratories, Massachusetts General Hospital Cancer Center, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Pierre Repiton
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA
- Neuroscience Program, Harvard Medical School, Boston, MA 02129, USA
- Section of Pharmaceutical Sciences, Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, 1205 Geneva, Switzerland
| | - Robert Morris
- Massachusetts General Hospital Cancer Center, Boston, MA 02129, USA
| | - Semer Maksoud
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA
- Neuroscience Program, Harvard Medical School, Boston, MA 02129, USA
| | - Michael Hla
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA
- Neuroscience Program, Harvard Medical School, Boston, MA 02129, USA
| | - Eric Zaniewski
- Massachusetts General Hospital Cancer Center, Boston, MA 02129, USA
| | - David P. Noske
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Neurosurgery, 1081 HV Amsterdam, the Netherlands
- Cancer Center Amsterdam, Brain Tumor Center and Liquid Biopsy Center, 1081 HV Amsterdam, the Netherlands
| | - Wilhelm Haas
- Massachusetts General Hospital Cancer Center, Boston, MA 02129, USA
- Department of Medicine, Harvard Medical School, Boston, MA 02129, USA
| | - Koen Breyne
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA
- Neuroscience Program, Harvard Medical School, Boston, MA 02129, USA
| | - Bakhos A. Tannous
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA
- Neuroscience Program, Harvard Medical School, Boston, MA 02129, USA
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9
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Dai J, Jiang Y, Hu H, Zhang S, Chen Y. Extracellular vesicles as modulators of glioblastoma progression and tumor microenvironment. Pathol Oncol Res 2024; 30:1611549. [PMID: 38379858 PMCID: PMC10876843 DOI: 10.3389/pore.2024.1611549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Accepted: 01/16/2024] [Indexed: 02/22/2024]
Abstract
Glioblastoma is the most aggressive brain tumor with extremely poor prognosis in adults. Routine treatments include surgery, chemotherapy, and radiotherapy; however, these may lead to rapid relapse and development of therapy-resistant tumor. Glioblastoma cells are known to communicate with macrophages, microglia, endothelial cells, astrocytes, and immune cells in the tumor microenvironment (TME) to promote tumor preservation. It was recently demonstrated that Glioblastoma-derived extracellular vesicles (EVs) participate in bidirectional intercellular communication in the TME. Apart from promoting glioblastoma cell proliferation, migration, and angiogenesis, EVs and their cargos (primarily proteins and miRNAs) can act as biomarkers for tumor diagnosis and prognosis. Furthermore, they can be used as therapeutic tools. In this review, the mechanisms of Glioblastoma-EVs biogenesis and intercellular communication with TME have been summarized. Moreover, there is discussion surrounding EVs as novel diagnostic structures and therapeutic tools for glioblastoma. Finally, unclear questions that require future investigation have been reviewed.
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Affiliation(s)
- Jie Dai
- Department of Pathology, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Yong Jiang
- Department of Neurosurgery, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Haoyue Hu
- Department of Medical Oncology, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Shuang Zhang
- Department of Pathology, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Yue Chen
- Department of Pathology, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
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10
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Williams MTS, Guzman ML. Cancer microenvironment and pharmacological interventions. Br J Pharmacol 2024; 181:213-215. [PMID: 38148105 DOI: 10.1111/bph.16279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2023] Open
Affiliation(s)
- Mark T S Williams
- Department of Biological and Biomedical Sciences, Glasgow Caledonian University, Glasgow, UK
| | - Monica L Guzman
- Department of Medicine, Division of Hematology and Oncology, Weill Cornell Medicine, New York, New York, USA
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11
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Zou W, Luo X, Gao M, Yu C, Wan X, Yu S, Wu Y, Wang A, Fenical W, Wei Z, Zhao Y, Lu Y. Optimization of cancer immunotherapy on the basis of programmed death ligand-1 distribution and function. Br J Pharmacol 2024; 181:257-272. [PMID: 36775813 PMCID: PMC11080663 DOI: 10.1111/bph.16054] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 02/04/2023] [Indexed: 02/14/2023] Open
Abstract
Programmed cell death protein-1 (PD-1)/programmed death ligand-1 (PD-L1) immune checkpoint blockade as a breakthrough in cancer immunotherapy has shown unprecedented positive outcomes in the clinic. However, the overall effectiveness of PD-L1 antibody is less than expected. An increasing number of studies have demonstrated that PD-L1 is widely distributed and expressed not only on the cell membrane but also on the inside of the cells as well as on the extracellular vesicles secreted by tumour cells. Both endogenous and exogenous PD-L1 play significant roles in influencing the therapeutic effect of anti-tumour immunity. Herein, we mainly focused on the distribution and function of PD-L1 and further summarized the potential targeted therapeutic strategies. More importantly, in addition to taking the overall expression abundance of PD-L1 as a predictive indicator for selecting corresponding PD-1/PD-L1 monoclonal antibodies (mAbs), we also proposed that personalized combination therapies based on the different distribution of PD-L1 are worth attention to achieve more efficient and effective therapeutic outcomes in cancer patients. LINKED ARTICLES: This article is part of a themed issue on Cancer Microenvironment and Pharmacological Interventions. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v181.2/issuetoc.
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Affiliation(s)
- Wei Zou
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Xin Luo
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Mengyuan Gao
- Department of Biochemistry and Molecular Biology, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Chang Yu
- Department of Biochemistry and Molecular Biology, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Xueting Wan
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Suyun Yu
- Department of Biochemistry and Molecular Biology, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yuanyuan Wu
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
- Jiangsu Joint International Research Laboratory of Chinese Medicine and Regenerative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- Jiangsu Collaborative Innovation Center of Traditional Chinese Medicine (TCM) Prevention and Treatment of Tumor, Nanjing University of Chinese Medicine, Nanjing, China
| | - Aiyun Wang
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
- Jiangsu Joint International Research Laboratory of Chinese Medicine and Regenerative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- Jiangsu Collaborative Innovation Center of Traditional Chinese Medicine (TCM) Prevention and Treatment of Tumor, Nanjing University of Chinese Medicine, Nanjing, China
| | - William Fenical
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, California, USA
| | - Zhonghong Wei
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
- Jiangsu Joint International Research Laboratory of Chinese Medicine and Regenerative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- Jiangsu Collaborative Innovation Center of Traditional Chinese Medicine (TCM) Prevention and Treatment of Tumor, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yang Zhao
- Department of Biochemistry and Molecular Biology, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yin Lu
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
- Jiangsu Joint International Research Laboratory of Chinese Medicine and Regenerative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- Jiangsu Collaborative Innovation Center of Traditional Chinese Medicine (TCM) Prevention and Treatment of Tumor, Nanjing University of Chinese Medicine, Nanjing, China
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12
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Laws MT, Walker EN, Cozzi FM, Ampie L, Jung MY, Burton EC, Brown DA. Glioblastoma may evade immune surveillance through primary cilia-dependent signaling in an IL-6 dependent manner. Front Oncol 2023; 13:1279923. [PMID: 38188300 PMCID: PMC10766829 DOI: 10.3389/fonc.2023.1279923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 11/20/2023] [Indexed: 01/09/2024] Open
Abstract
Glioblastoma is the most common, malignant primary brain tumor in adults and remains universally fatal. While immunotherapy has vastly improved the treatment of several solid cancers, efficacy in glioblastoma is limited. These challenges are due in part to the propensity of glioblastoma to recruit tumor-suppressive immune cells, which act in conjunction with tumor cells to create a pro-tumor immune microenvironment through secretion of several soluble factors. Glioblastoma-derived EVs induce myeloid-derived suppressor cells (MDSCs) and non-classical monocytes (NCMs) from myeloid precursors leading to systemic and local immunosuppression. This process is mediated by IL-6 which contributes to the recruitment of tumor-associated macrophages of the M2 immunosuppressive subtype, which in turn, upregulates anti-inflammatory cytokines including IL-10 and TGF-β. Primary cilia are highly conserved organelles involved in signal transduction and play critical roles in glioblastoma proliferation, invasion, angiogenesis, and chemoradiation resistance. In this perspectives article, we provide preliminary evidence that primary cilia regulate intracellular release of IL-6. This ties primary cilia mechanistically to tumor-mediated immunosuppression in glioblastomas and potentially, in additional neoplasms which have a shared mechanism for cancer-mediated immunosuppression. We propose potentially testable hypotheses of the cellular mechanisms behind this finding.
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Affiliation(s)
- Maxwell T. Laws
- Neurosurgical Oncology Unit, Surgical Neurology Branch, National Institutes of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States
| | - Erin N. Walker
- Neurosurgical Oncology Unit, Surgical Neurology Branch, National Institutes of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States
- University of South Carolina School of Medicine Greenville, Greenville, SC, United States
| | - Francesca M. Cozzi
- Cambridge Brain Tumour Imaging Lab, Division of Neurosurgery, Department of Clinical Neurosciences, University of Cambridge, Addenbroke’s Hospital, Cambridge, United Kingdom
| | - Leonel Ampie
- Neurosurgical Oncology Unit, Surgical Neurology Branch, National Institutes of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States
| | - Mi-Yeon Jung
- Neurosurgical Oncology Unit, Surgical Neurology Branch, National Institutes of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States
| | - Eric C. Burton
- Neurosurgical Oncology Unit, Surgical Neurology Branch, National Institutes of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States
- Neuro-Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, United States
| | - Desmond A. Brown
- Neurosurgical Oncology Unit, Surgical Neurology Branch, National Institutes of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States
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13
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Yu C, Hsieh K, Cherry DR, Nehlsen AD, Resende Salgado L, Lazarev S, Sindhu KK. Immune Escape in Glioblastoma: Mechanisms of Action and Implications for Immune Checkpoint Inhibitors and CAR T-Cell Therapy. BIOLOGY 2023; 12:1528. [PMID: 38132354 PMCID: PMC10741174 DOI: 10.3390/biology12121528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 12/07/2023] [Accepted: 12/12/2023] [Indexed: 12/23/2023]
Abstract
Glioblastoma, the most common primary brain cancer in adults, is characterized by a poor prognosis and resistance to standard treatments. The advent of immunotherapy has revolutionized the treatment of several cancers in recent years but has failed to demonstrate benefit in patients with glioblastoma. Understanding the mechanisms by which glioblastoma exerts tumor-mediated immune suppression in both the tumor microenvironment and the systemic immune landscape is a critical step towards developing effective immunotherapeutic strategies. In this review, we discuss the current understanding of immune escape mechanisms in glioblastoma that compromise the efficacy of immunotherapies, with an emphasis on immune checkpoint inhibitors and chimeric antigen receptor T-cell therapy. In parallel, we review data from preclinical studies that have identified additional therapeutic targets that may enhance overall treatment efficacy in glioblastoma when administered alongside existing immunotherapies.
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Affiliation(s)
| | | | | | | | | | | | - Kunal K. Sindhu
- Department of Radiation Oncology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; (C.Y.); (D.R.C.); (A.D.N.); (L.R.S.); (S.L.)
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14
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Asleh K, Dery V, Taylor C, Davey M, Djeungoue-Petga MA, Ouellette RJ. Extracellular vesicle-based liquid biopsy biomarkers and their application in precision immuno-oncology. Biomark Res 2023; 11:99. [PMID: 37978566 PMCID: PMC10655470 DOI: 10.1186/s40364-023-00540-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 11/06/2023] [Indexed: 11/19/2023] Open
Abstract
While the field of precision oncology is rapidly expanding and more targeted options are revolutionizing cancer treatment paradigms, therapeutic resistance particularly to immunotherapy remains a pressing challenge. This can be largely attributed to the dynamic tumor-stroma interactions that continuously alter the microenvironment. While to date most advancements have been made through examining the clinical utility of tissue-based biomarkers, their invasive nature and lack of a holistic representation of the evolving disease in a real-time manner could result in suboptimal treatment decisions. Thus, using minimally-invasive approaches to identify biomarkers that predict and monitor treatment response as well as alert to the emergence of recurrences is of a critical need. Currently, research efforts are shifting towards developing liquid biopsy-based biomarkers obtained from patients over the course of disease. Liquid biopsy represents a unique opportunity to monitor intercellular communication within the tumor microenvironment which could occur through the exchange of extracellular vesicles (EVs). EVs are lipid bilayer membrane nanoscale vesicles which transfer a plethora of biomolecules that mediate intercellular crosstalk, shape the tumor microenvironment, and modify drug response. The capture of EVs using innovative approaches, such as microfluidics, magnetic beads, and aptamers, allow their analysis via high throughput multi-omics techniques and facilitate their use for biomarker discovery. Artificial intelligence, using machine and deep learning algorithms, is advancing multi-omics analyses to uncover candidate biomarkers and predictive signatures that are key for translation into clinical trials. With the increasing recognition of the role of EVs in mediating immune evasion and as a valuable biomarker source, these real-time snapshots of cellular communication are promising to become an important tool in the field of precision oncology and spur the recognition of strategies to block resistance to immunotherapy. In this review, we discuss the emerging role of EVs in biomarker research describing current advances in their isolation and analysis techniques as well as their function as mediators in the tumor microenvironment. We also highlight recent lung cancer and melanoma studies that point towards their application as predictive biomarkers for immunotherapy and their potential clinical use in precision immuno-oncology.
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Affiliation(s)
- Karama Asleh
- Atlantic Cancer Research Institute, Moncton, New Brunswick, Canada.
| | - Valerie Dery
- Department of Chemistry and Biochemistry, Université de Moncton, Moncton, New Brunswick, Canada
| | - Catherine Taylor
- Atlantic Cancer Research Institute, Moncton, New Brunswick, Canada
| | - Michelle Davey
- Atlantic Cancer Research Institute, Moncton, New Brunswick, Canada
| | | | - Rodney J Ouellette
- Atlantic Cancer Research Institute, Moncton, New Brunswick, Canada
- Department of Chemistry and Biochemistry, Université de Moncton, Moncton, New Brunswick, Canada
- Dr Georges L. Dumont University Hospital, Vitalite Health Network, Moncton, New Brunswick, Canada
- Beatrice Hunter Cancer Research Institute, Halifax, Nova Scotia, Canada
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15
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Van Gool SW, Van de Vliet P, Kampers LFC, Kosmal J, Sprenger T, Reich E, Schirrmacher V, Stuecker W. Methods behind oncolytic virus-based DC vaccines in cancer: Toward a multiphase combined treatment strategy for Glioblastoma (GBM) patients. Methods Cell Biol 2023; 183:51-113. [PMID: 38548421 DOI: 10.1016/bs.mcb.2023.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/02/2024]
Abstract
Glioblastoma (GBM) remains an orphan cancer disease with poor outcome. Novel treatment strategies are needed. Immunotherapy has several modes of action. The addition of active specific immunotherapy with dendritic cell vaccines resulted in improved overall survival of patients. Integration of DC vaccination within the first-line combined treatment became a challenge, and immunogenic cell death immunotherapy during chemotherapy was introduced. We used a retrospective analysis using real world data to evaluate the complex combined treatment, which included individualized multimodal immunotherapy during and after standard of care, and which required adaptations during treatment, and found a further improvement of overall survival. We also discuss the use of real world data as evidence. Novel strategies to move the field of individualized multimodal immunotherapy forward for GBM patients are reviewed.
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Affiliation(s)
| | | | | | | | | | - Ella Reich
- Immun-onkologisches Zentrum Köln, Cologne, Germany
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16
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Xia Z, Tu R, Liu F, Zhang H, Dai Z, Wang Z, Luo P, He S, Xiao G, Feng J, Cheng Q. PD-L1-related IncRNAs are associated with malignant characteristics and immune microenvironment in glioma. Aging (Albany NY) 2023; 15:10785-10810. [PMID: 37837543 PMCID: PMC10599717 DOI: 10.18632/aging.205120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 08/21/2023] [Indexed: 10/16/2023]
Abstract
BACKGROUND The expression of long non-coding RNA (lncRNA) can function as diagnostic and therapeutic biomarker for tumors. This research explores the role of PD-L1-related lncRNAs in affecting malignant characteristics and the immune microenvironment of glioma. METHODS Downloading gene expression profiles and clinicopathological information of glioma from TCGA and CGGA databases, 6 PD-L1-related lncRNAs were identified through correlation analysis, Cox and LASSO regression analysis, establishing the risk score model based on them. Bioinformatics analysis and cell experiments in vitro were adopted to verify the effects of LINC01271 on glioma. RESULTS Risk scores based on 6 PD-L1-related lncRNAs (AL355974.3, LINC01271, AC011899.3, MIR4500HG, LINC02594, AL357055.3) can reflect malignant characteristics and immunotherapy response of glioma. Patients with high LINC01271 expression had a worse prognosis, a higher abundance of M1 subtype macrophages in the immune microenvironment, and a higher degree of tumor malignancy. Experiments in vitro confirmed its positive regulatory effect on the proliferation and migration of glioma cells. CONCLUSIONS The risk score model based on 6 PD-L1-related lncRNAs can reflect the malignant characteristics and prognosis of glioma. LINC01271 can independently be used as a new target for prognosis evaluation and therapy.
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Affiliation(s)
- Zhiwei Xia
- Department of Neurology, Hunan Aerospace Hospital, Changsha 410205, Hunan, P.R. China
| | - Ruxin Tu
- Department of Neurology, Xiangya Hospital, Central South University, Changsha 410008, Hunan Province, P.R. China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, Hunan, P.R. China
| | - Fangkun Liu
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha 410008, Hunan Province, P.R. China
| | - Hao Zhang
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha 410008, Hunan Province, P.R. China
- Department of Neurosurgery, The Second Affiliated Hospital, Chongqing Medical University, Chongqing 400010, P.R. China
| | - Ziyu Dai
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha 410008, Hunan Province, P.R. China
| | - Zeyu Wang
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha 410008, Hunan Province, P.R. China
- MRC Centre for Regenerative Medicine, Institute for Regeneration and Repair, University of Edinburgh, Little France, Edinburgh, EH16 4UU, UK
| | - Peng Luo
- Department of Oncology, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, P.R. China
| | - Shiqing He
- Department of Neurosurgery, Affiliated Nanhua Hospital, Hengyang Medical College, University of South China, Hengyang 421001, Hunan, P.R. China
| | - Gelei Xiao
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha 410008, Hunan Province, P.R. China
| | - Jie Feng
- Department of Neurology, Xiangya Hospital, Central South University, Changsha 410008, Hunan Province, P.R. China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, Hunan, P.R. China
- Hunan Clinical Research Center for Cerebrovascular Disease, Changsha 410008, Hunan Province, P.R. China
| | - Quan Cheng
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha 410008, Hunan Province, P.R. China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, Hunan, P.R. China
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17
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Cumba Garcia LM, Bouchal SM, Bauman MMJ, Parney IF. Advancements and Technical Considerations for Extracellular Vesicle Isolation and Biomarker Identification in Glioblastoma. Neurosurgery 2023; 93:33-42. [PMID: 36749103 DOI: 10.1227/neu.0000000000002393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 12/06/2022] [Indexed: 02/08/2023] Open
Abstract
Extracellular vesicles (EVs) are membrane-bound particles released by all cells. Previous research has found that these microscopic vesicles contribute to intercellular signaling and communication. EVs carry a variety of cargo, including nucleic acids, proteins, metabolites, and lipids. The composition of EVs varies based on cell of origin. Therefore, EVs can serve as an important biomarker in the diagnosis and treatment of various cancers. EVs derived from glioblastoma (GBM) cells carry biomarkers, which could serve as the basis for a potential diagnostic strategy known as liquid biopsy. Multiple EV isolation techniques exist, including ultrafiltration, size exclusion chromatography, flow field-flow fractionation, sequential filtration, differential ultracentrifugation, and density-gradient ultracentrifugation. Recent and ongoing work aims to identify cellular markers to distinguish GBM-derived EVs from those released by noncancerous cells. Strategies include proteomic analysis of GBM EVs, identification of GBM-specific metabolites, and use of Food and Drug Administration-approved 5-aminolevulinic acid-an oral agent that causes fluorescence of GBM cells-to recognize GBM EVs in a patient's blood. In addition, accurately and precisely monitoring changes in EV cargo concentrations could help differentiate between pseudoprogression and GBM recurrence, thus preventing unnecessary surgical interventions.
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Affiliation(s)
- Luz M Cumba Garcia
- Department of Immunology, Mayo Clinic Graduate School of Biomedical Sciences, Rochester, Minnesota, USA
| | - Samantha M Bouchal
- Mayo Clinic Alix School of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Megan M J Bauman
- Mayo Clinic Alix School of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Ian F Parney
- Department of Neurological Surgery, Mayo Clinic, Rochester, Minnesota, USA
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18
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Xu C, Wang P, Guo H, Shao C, Liao B, Gong S, Zhou Y, Yang B, Jiang H, Zhang G, Wu N. MiR-146a-5p deficiency in extracellular vesicles of glioma-associated macrophages promotes epithelial-mesenchymal transition through the NF-κB signaling pathway. Cell Death Discov 2023; 9:206. [PMID: 37391426 DOI: 10.1038/s41420-023-01492-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 06/05/2023] [Accepted: 06/15/2023] [Indexed: 07/02/2023] Open
Abstract
Glioma-associated macrophages (GAMs) are pivotal chains in the tumor immune microenvironment (TIME). GAMs mostly display M2-like phenotypes with anti-inflammatory features related to the malignancy and progression of cancers. Extracellular vesicles derived from immunosuppressive GAMs (M2-EVs), the essential components of the TIME, greatly impact the malignant behavior of GBM cells. M1- or M2-EVs were isolated in vitro, and human GBM cell invasion and migration were reinforced under M2-EV treatment. Signatures of the epithelial-mesenchymal transition (EMT) were also enhanced by M2-EVs. Compared with M1-EVs, miR-146a-5p, considered the key factor in TIME regulation, was deficient in M2-EVs according to miRNA-sequencing. When the miR-146a-5p mimic was added, EMT signatures and the invasive and migratory abilities of GBM cells were correspondingly weakened. Public databases predicted the miRNA binding targets and interleukin 1 receptor-associated kinase 1 (IRAK1) and tumor necrosis factor receptor-associated factor 6 (TRAF6) were screened as miR-146a-5p binding genes. Bimolecular fluorescent complementation and coimmunoprecipitation confirmed interactions between TRAF6 and IRAK1. The correlation between TRAF6 and IRAK1 was evaluated with immunofluorescence (IF)-stained clinical glioma samples. The TRAF6-IRAK1 complex is the switch and the brake that modulates IKK complex phosphorylation and NF-κB pathway activation, as well as the EMT behaviors of GBM cells. Furthermore, a homograft nude mouse model was explored and mice transplanted with TRAF6/IRAK1-overexpressing glioma cells had shorter survival times while mice transplanted with glioma cells with miR-146a-5p overexpression or TRAF6/IRAK1 knockdown lived longer. This work indicated that in the TIME of GBM, the deficiency of miR-146a-5p in M2-EVs enhances tumor EMT through disinhibition of the TRAF6-IRAK1 complex and IKK-dependent NF-κB signaling pathway providing a novel therapeutic strategy targeting the TIME of GBM.
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Affiliation(s)
- Chao Xu
- Chongqing Medical University, Chongqing, China
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
- Chongqing School, University of Chinese Academy of Sciences, Chongqing, China
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
| | - Pan Wang
- Chongqing Medical University, Chongqing, China
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
- Chongqing School, University of Chinese Academy of Sciences, Chongqing, China
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
| | - Haiyan Guo
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Chuan Shao
- Chongqing Medical University, Chongqing, China
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
- Chongqing School, University of Chinese Academy of Sciences, Chongqing, China
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
| | - Bin Liao
- Chongqing Medical University, Chongqing, China
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
| | - Sheng Gong
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
| | - Yanghao Zhou
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
| | - Bingjie Yang
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Haotian Jiang
- Chongqing Medical University, Chongqing, China
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
- Chongqing School, University of Chinese Academy of Sciences, Chongqing, China
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
| | - Gang Zhang
- Chongqing Medical University, Chongqing, China
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
- Chongqing School, University of Chinese Academy of Sciences, Chongqing, China
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
| | - Nan Wu
- Chongqing Medical University, Chongqing, China.
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China.
- Chongqing School, University of Chinese Academy of Sciences, Chongqing, China.
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China.
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19
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Wang J, Liu Y, Liu F, Gan S, Roy S, Hasan I, Zhang B, Guo B. Emerging extracellular vesicle-based carriers for glioblastoma diagnosis and therapy. NANOSCALE 2023. [PMID: 37337814 DOI: 10.1039/d3nr01667f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
Glioblastoma (GBM) treatment is still a big clinical challenge because of its highly malignant, invasive, and lethal characteristics. After treatment with the conventional therapeutic paradigm of surgery combined with radio- and chemotherapy, patients bearing GBMs generally exhibit a poor prognosis, with high mortality and a high disability rate. The main reason is the existence of the formidable blood-brain barrier (BBB), aggressive growth, and the infiltration nature of GBMs. Especially, the BBB suppresses the delivery of imaging and therapeutic agents to lesion sites, and thus this leads to difficulties in achieving a timely diagnosis and treatment. Recent studies have demonstrated that extracellular vesicles (EVs) exhibit favorable merits including good biocompatibility, a strong drug loading capacity, long circulation time, good BBB crossing efficiency, specific targeting to lesion sites, and high efficiency in the delivery of a variety of cargos for GBM therapy. Importantly, EVs inherit physiological and pathological molecules from the source cells, which are ideal biomarkers for molecularly tracking the malignant progression of GBMs. Herein, we start by introducing the pathophysiology and physiology of GBMs, followed by presenting the biological functions of EVs in GBMs with a special focus on their role as biomarkers for GBM diagnosis and as messengers in the modulation of the GBM microenvironment. Furthermore, we provide an update on the recent progress of using EVs in biology, functionality, and isolation applications. More importantly, we systematically summarize the most recent advances of EV-based carriers for GBM therapy by delivering different drugs including gene/RNA-based drugs, chemotherapy drugs, imaging agents, and combinatory drugs. Lastly, we point out the challenges and prospects of future research on EVs for diagnosing and treating GBMs. We hope this review will stimulate interest from researchers with different backgrounds and expedite the progress of GBM treatment paradigms.
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Affiliation(s)
- Jingjing Wang
- Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive Application, Shenzhen Key Laboratory of Flexible Printed Electronics Technology, and School of Science, Harbin Institute of Technology, Shenzhen 518055, China.
- Shenzhen Key Laboratory of Flexible Printed Electronics Technology, Harbin Institute of Technology, Shenzhen 518055, China
| | - Yue Liu
- Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive Application, Shenzhen Key Laboratory of Flexible Printed Electronics Technology, and School of Science, Harbin Institute of Technology, Shenzhen 518055, China.
- Shenzhen Key Laboratory of Flexible Printed Electronics Technology, Harbin Institute of Technology, Shenzhen 518055, China
| | - Fengbo Liu
- Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive Application, Shenzhen Key Laboratory of Flexible Printed Electronics Technology, and School of Science, Harbin Institute of Technology, Shenzhen 518055, China.
- Shenzhen Key Laboratory of Flexible Printed Electronics Technology, Harbin Institute of Technology, Shenzhen 518055, China
| | - Shaoyan Gan
- Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive Application, Shenzhen Key Laboratory of Flexible Printed Electronics Technology, and School of Science, Harbin Institute of Technology, Shenzhen 518055, China.
- Shenzhen Key Laboratory of Flexible Printed Electronics Technology, Harbin Institute of Technology, Shenzhen 518055, China
| | - Shubham Roy
- Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive Application, Shenzhen Key Laboratory of Flexible Printed Electronics Technology, and School of Science, Harbin Institute of Technology, Shenzhen 518055, China.
- Shenzhen Key Laboratory of Flexible Printed Electronics Technology, Harbin Institute of Technology, Shenzhen 518055, China
| | - Ikram Hasan
- Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive Application, Shenzhen Key Laboratory of Flexible Printed Electronics Technology, and School of Science, Harbin Institute of Technology, Shenzhen 518055, China.
- Shenzhen Key Laboratory of Flexible Printed Electronics Technology, Harbin Institute of Technology, Shenzhen 518055, China
| | - Baozhu Zhang
- Department of Oncology, People's Hospital of Shenzhen Baoan District, The Second Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong 518055, China.
| | - Bing Guo
- Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive Application, Shenzhen Key Laboratory of Flexible Printed Electronics Technology, and School of Science, Harbin Institute of Technology, Shenzhen 518055, China.
- Shenzhen Key Laboratory of Flexible Printed Electronics Technology, Harbin Institute of Technology, Shenzhen 518055, China
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20
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Rocha Pinheiro SL, Lemos FFB, Marques HS, Silva Luz M, de Oliveira Silva LG, Faria Souza Mendes dos Santos C, da Costa Evangelista K, Calmon MS, Sande Loureiro M, Freire de Melo F. Immunotherapy in glioblastoma treatment: Current state and future prospects. World J Clin Oncol 2023; 14:138-159. [PMID: 37124134 PMCID: PMC10134201 DOI: 10.5306/wjco.v14.i4.138] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 02/06/2023] [Accepted: 04/12/2023] [Indexed: 04/21/2023] Open
Abstract
Glioblastoma remains as the most common and aggressive malignant brain tumor, standing with a poor prognosis and treatment prospective. Despite the aggressive standard care, such as surgical resection and chemoradiation, median survival rates are low. In this regard, immunotherapeutic strategies aim to become more attractive for glioblastoma, considering its recent advances and approaches. In this review, we provide an overview of the current status and progress in immunotherapy for glioblastoma, going through the fundamental knowledge on immune targeting to promising strategies, such as Chimeric antigen receptor T-Cell therapy, immune checkpoint inhibitors, cytokine-based treatment, oncolytic virus and vaccine-based techniques. At last, it is discussed innovative methods to overcome diverse challenges, and future perspectives in this area.
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Affiliation(s)
- Samuel Luca Rocha Pinheiro
- Instituto Multidisciplinar em Saúde, Universidade Federal da Bahia, Vitória da Conquista 45029-094, Bahia, Brazil
| | - Fabian Fellipe Bueno Lemos
- Instituto Multidisciplinar em Saúde, Universidade Federal da Bahia, Vitória da Conquista 45029-094, Bahia, Brazil
| | - Hanna Santos Marques
- Campus Vitória da Conquista, Universidade Estadual do Sudoeste da Bahia, Vitória da Conquista 45029-094, Bahia, Brazil
| | - Marcel Silva Luz
- Instituto Multidisciplinar em Saúde, Universidade Federal da Bahia, Vitória da Conquista 45029-094, Bahia, Brazil
| | | | | | | | - Mariana Santos Calmon
- Instituto Multidisciplinar em Saúde, Universidade Federal da Bahia, Vitória da Conquista 45029-094, Bahia, Brazil
| | - Matheus Sande Loureiro
- Instituto Multidisciplinar em Saúde, Universidade Federal da Bahia, Vitória da Conquista 45029-094, Bahia, Brazil
| | - Fabrício Freire de Melo
- Instituto Multidisciplinar em Saúde, Universidade Federal da Bahia, Vitória da Conquista 45029-094, Bahia, Brazil
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21
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Neth BJ, Webb MJ, Parney IF, Sener UT. The Current Status, Challenges, and Future Potential of Therapeutic Vaccination in Glioblastoma. Pharmaceutics 2023; 15:pharmaceutics15041134. [PMID: 37111620 PMCID: PMC10141140 DOI: 10.3390/pharmaceutics15041134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/29/2023] [Accepted: 03/30/2023] [Indexed: 04/29/2023] Open
Abstract
Glioblastoma (GBM) is the most common malignant primary brain tumor and confers a dismal prognosis. With only two FDA-approved therapeutics showing modest survival gains since 2005, there is a great need for the development of other disease-targeted therapies. Due, in part, to the profound immunosuppressive microenvironment seen in GBMs, there has been a broad interest in immunotherapy. In both GBMs and other cancers, therapeutic vaccines have generally yielded limited efficacy, despite their theoretical basis. However, recent results from the DCVax-L trial provide some promise for vaccine therapy in GBMs. There is also the potential that future combination therapies with vaccines and adjuvant immunomodulating agents may greatly enhance antitumor immune responses. Clinicians must remain open to novel therapeutic strategies, such as vaccinations, and carefully await the results of ongoing and future trials. In this review of GBM management, the promise and challenges of immunotherapy with a focus on therapeutic vaccinations are discussed. Additionally, adjuvant therapies, logistical considerations, and future directions are discussed.
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Affiliation(s)
- Bryan J Neth
- Department of Neurology, Mayo Clinic, Rochester, MN 55905, USA
| | - Mason J Webb
- Department of Medical Oncology, Mayo Clinic, Rochester, MN 55905, USA
| | - Ian F Parney
- Department of Neurosurgery, Mayo Clinic, Rochester, MN 55905, USA
| | - Ugur T Sener
- Department of Neurology, Mayo Clinic, Rochester, MN 55905, USA
- Department of Medical Oncology, Mayo Clinic, Rochester, MN 55905, USA
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22
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Fendl B, Berghoff AS, Preusser M, Maier B. Macrophage and monocyte subsets as new therapeutic targets in cancer immunotherapy. ESMO Open 2023; 8:100776. [PMID: 36731326 PMCID: PMC10024158 DOI: 10.1016/j.esmoop.2022.100776] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 12/05/2022] [Accepted: 12/11/2022] [Indexed: 02/04/2023] Open
Abstract
The introduction of immune checkpoint inhibitors (ICIs) for the treatment of solid cancers dramatically turned the tables in clinical routine. However, therapy success is still limited with up to 70% of non-responders in patients with ICI treatment. Traditionally, most immunotherapy approaches aim at directly stimulating anti-tumor T cell responses. More recently, tumor-associated macrophages have come into focus due to their predominance in solid tumors. Intensive cross-talk with tumor cells and immune as well as stromal cells within the tumor microenvironment can drive either pro- or anti-tumorigenic macrophage phenotypes. In turn, tumor-associated macrophages strongly shape cytokine and metabolite levels in the tumor microenvironment and thus are central players in anti-tumor immunity. Thus, ambivalent macrophage populations exist which raises therapeutic possibilities to either enhance or diminish their functionality. However, molecular signals controlling tumor-associated macrophage polarization are incompletely understood. Gaining in-depth understanding of monocyte/macrophage properties both in circulation and within distinct tumor microenvironments would (i) allow the development of new therapeutic approaches, and (ii) could additionally aid our understanding of underlying mechanisms limiting current therapy with the option of combinatorial therapies to increase efficacy. In this review, we summarize recent data addressing heterogeneity of tumor-associated macrophage populations and we discuss strategies to target macrophages using known molecular pathways with the potential for straight-forward clinical application.
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Affiliation(s)
- B Fendl
- Division of Oncology, Department of Medicine I, Medical University of Vienna, Vienna, Austria; Christian Doppler Laboratory for Personalized Immunotherapy, Department of Medicine I, Medical University of Vienna, Vienna, Austria
| | - A S Berghoff
- Division of Oncology, Department of Medicine I, Medical University of Vienna, Vienna, Austria; Christian Doppler Laboratory for Personalized Immunotherapy, Department of Medicine I, Medical University of Vienna, Vienna, Austria
| | - M Preusser
- Division of Oncology, Department of Medicine I, Medical University of Vienna, Vienna, Austria; Christian Doppler Laboratory for Personalized Immunotherapy, Department of Medicine I, Medical University of Vienna, Vienna, Austria
| | - B Maier
- CeMM, Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria.
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23
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Aibaidula A(Z, Fain CE, Garcia LC, Wier A, Bouchal SM, Bauman MM, Jung MY, Sarkaria JN, Johnson AJ, Parney IF. Spectral flow cytometry identifies distinct nonneoplastic plasma extracellular vesicle phenotype in glioblastoma patients. Neurooncol Adv 2023; 5:vdad082. [PMID: 37638345 PMCID: PMC10457026 DOI: 10.1093/noajnl/vdad082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/29/2023] Open
Abstract
Background Glioblastoma (GBM) is the most common malignant brain tumor and has a poor prognosis. Imaging findings at diagnosis and in response to treatment are nonspecific. Developing noninvasive assays to augment imaging would be helpful. Plasma extracellular vesicles (EVs) are a promising biomarker source for this. Here, we develop spectral flow cytometry techniques that demonstrate differences in bulk plasma EV phenotype between GBM patients and normal donors that could serve as the basis of a liquid biopsy. Methods Plasma EVs were stained for EV-associated tetraspanins (CD9/CD63/CD81), markers indicating cell of origin (CD11b/CD31/CD41a/CD45), and actin/phalloidin (to exclude cell debris). EVs were analyzed using spectral flow cytometry. Multiparametric analysis using t-distributed stochastic neighbor embedding (t-SNE) and self-organizing maps on flow cytometry data (FlowSOM) was performed comparing GBM and normal donor (ND) plasma EVs. Results Size exclusion chromatography plus spectral-based flow cytometer threshold settings enriched plasma EVs while minimizing background noise. GBM patients had increased CD9+, CD63+, CD81+, and myeloid-derived (CD11b+) EVs. Multiparametric analysis demonstrated distinct surface marker expression profiles in GBM plasma EVs compared to ND EVs. Fifteen plasma EV sub-populations differing in size and surface marker expression were identified, six enriched in GBM patients and two in normal donors. Conclusions Multiparametric analysis demonstrates that GBM patients have a distinct nonneoplastic plasma EV phenotype compared to ND. This simple rapid analysis can be performed without purifying tumor EVs and may serve as the basis of a liquid biopsy.
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Affiliation(s)
- Abudumijiti (Zack) Aibaidula
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, Minnesota, USA
- Department of Neurological Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Cori E Fain
- Department of Immunology, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, Minnesota, USA
| | - Luz Cumba Garcia
- Department of Immunology, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, Minnesota, USA
| | - Annelise Wier
- Department of Neurological Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Samantha M Bouchal
- Department of Neurological Surgery, Mayo Clinic, Rochester, Minnesota, USA
- Mayo Clinic Alix School of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Megan M Bauman
- Department of Neurological Surgery, Mayo Clinic, Rochester, Minnesota, USA
- Mayo Clinic Alix School of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Mi-Yeon Jung
- Department of Neurological Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Jann N Sarkaria
- Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota, USA
| | - Aaron J Johnson
- Department of Immunology, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, Minnesota, USA
| | - Ian F Parney
- Department of Neurological Surgery, Mayo Clinic, Rochester, Minnesota, USA
- Department of Immunology, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, Minnesota, USA
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24
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Musatova OE, Rubtsov YP. Effects of glioblastoma-derived extracellular vesicles on the functions of immune cells. Front Cell Dev Biol 2023; 11:1060000. [PMID: 36960410 PMCID: PMC10028257 DOI: 10.3389/fcell.2023.1060000] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 02/22/2023] [Indexed: 03/09/2023] Open
Abstract
Glioblastoma is the most aggressive variant of glioma, the tumor of glial origin which accounts for 80% of brain tumors. Glioblastoma is characterized by astoundingly poor prognosis for patients; a combination of surgery, chemo- and radiotherapy used for clinical treatment of glioblastoma almost inevitably results in rapid relapse and development of more aggressive and therapy resistant tumor. Recently, it was demonstrated that extracellular vesicles produced by glioblastoma (GBM-EVs) during apoptotic cell death can bind to surrounding cells and change their phenotype to more aggressive. GBM-EVs participate also in establishment of immune suppressive microenvironment that protects glioblastoma from antigen-specific recognition and killing by T cells. In this review, we collected present data concerning characterization of GBM-EVs and study of their effects on different populations of the immune cells (T cells, macrophages, dendritic cells, myeloid-derived suppressor cells). We aimed at critical analysis of experimental evidence in order to conclude whether glioblastoma-derived extracellular vesicles are a major factor in immune evasion of this deadly tumor. We summarized data concerning potential use of GBM-EVs for non-invasive diagnostics of glioblastoma. Finally, the applicability of approaches aimed at blocking of GBM-EVs production or their fusion with target cells for treatment of glioblastoma was analyzed.
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Affiliation(s)
- Oxana E. Musatova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, RAS, Moscow, Russia
| | - Yury P. Rubtsov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, RAS, Moscow, Russia
- N.N.Blokhin Russian Cancer Research Center, Ministry of Health of the Russian Federation, Moscow, Russia
- *Correspondence: Yury P. Rubtsov,
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25
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Tumor-Derived Extracellular Vesicles in Cancer Immunoediting and Their Potential as Oncoimmunotherapeutics. Cancers (Basel) 2022; 15:cancers15010082. [PMID: 36612080 PMCID: PMC9817790 DOI: 10.3390/cancers15010082] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/16/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022] Open
Abstract
The tumor microenvironment (TME) within and around a tumor is a complex interacting mixture of tumor cells with various stromal cells, including endothelial cells, fibroblasts, and immune cells. In the early steps of tumor formation, the local microenvironment tends to oppose carcinogenesis, while with cancer progression, the microenvironment skews into a protumoral TME and the tumor influences stromal cells to provide tumor-supporting functions. The creation and development of cancer are dependent on escape from immune recognition predominantly by influencing stromal cells, particularly immune cells, to suppress antitumor immunity. This overall process is generally called immunoediting and has been categorized into three phases; elimination, equilibrium, and escape. Interaction of tumor cells with stromal cells in the TME is mediated generally by cell-to-cell contact, cytokines, growth factors, and extracellular vesicles (EVs). The least well studied are EVs (especially exosomes), which are nanoparticle-sized bilayer membrane vesicles released by many cell types that participate in cell/cell communication. EVs carry various proteins, nucleic acids, lipids, and small molecules that influence cells that ingest the EVs. Tumor-derived extracellular vesicles (TEVs) play a significant role in every stage of immunoediting, and their cargoes change from immune-activating in the early stages of immunoediting into immunosuppressing in the escape phase. In addition, their cargos change with different treatments or stress conditions and can be influenced to be more immune stimulatory against cancer. This review focuses on the emerging understanding of how TEVs affect the differentiation and effector functions of stromal cells and their role in immunoediting, from the early stages of immunoediting to immune escape. Consideration of how TEVs can be therapeutically utilized includes different treatments that can modify TEV to support cancer immunotherapy.
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26
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Bauman MM, Bouchal SM, Monie DD, Aibaidula A(Z, Singh R, Parney IF. Strategies, considerations, and recent advancements in the development of liquid biopsy for glioblastoma: a step towards individualized medicine in glioblastoma. Neurosurg Focus 2022; 53:E14. [PMID: 36455271 PMCID: PMC9879623 DOI: 10.3171/2022.9.focus22430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 09/19/2022] [Indexed: 12/03/2022]
Abstract
OBJECTIVE Glioblastoma (GBM) is a devasting primary brain tumor with less than a 5% 5-year survival. Treatment response assessment can be challenging because of inflammatory pseudoprogression that mimics true tumor progression clinically and on imaging. Developing additional noninvasive assays is critical. In this article, the authors review various biomarkers that could be used in developing liquid biopsies for GBM, along with strengths, limitations, and future applications. In addition, they present a potential liquid biopsy design based on the use of an extracellular vesicle-based liquid biopsy targeting nonneoplastic extracellular vesicles. METHODS The authors conducted a current literature review of liquid biopsy in GBM by searching the PubMed, Scopus, and Google Scholar databases. Articles were assessed for type of biomarker, isolation methodology, analytical techniques, and clinical relevance. RESULTS Recent work has shown that liquid biopsies of plasma, blood, and/or CSF hold promise as noninvasive clinical tools that can be used to diagnose recurrence, assess treatment response, and predict patient outcomes in GBM. Liquid biopsy in GBM has focused primarily on extracellular vesicles, cell-free tumor nucleic acids, and whole-cell isolates as focal biomarkers. GBM tumor signatures have been generated via analysis of tumor gene mutations, unique RNA expression, and metabolic and proteomic alterations. Liquid biopsies capture tumor heterogeneity, identifying alterations in GBM tumors that may be undetectable via surgical biopsy specimens. Finally, biomarker burden can be used to assess treatment response and recurrence in GBM. CONCLUSIONS Liquid biopsy offers a promising avenue for monitoring treatment response and recurrence in GBM without invasive procedures. Although additional steps must be taken to bring liquid biopsy into the clinic, proof-of-principle studies and isolation methodologies are promising. Ultimately, CSF and/or plasma-based liquid biopsy is likely to be a powerful tool in the neurosurgeon's arsenal in the near future for the treatment and management of GBM patients.
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Affiliation(s)
- Megan M.J. Bauman
- Mayo Clinic Alix School of Medicine, Rochester, Minnesota, USA,Department of Neurological Surgery, Rochester, Minnesota, USA
| | - Samantha M. Bouchal
- Mayo Clinic Alix School of Medicine, Rochester, Minnesota, USA,Department of Neurological Surgery, Rochester, Minnesota, USA
| | - Dileep D. Monie
- Mayo Clinic Alix School of Medicine, Rochester, Minnesota, USA,Department of Neurological Surgery, Rochester, Minnesota, USA
| | - Abudumijiti (Zack) Aibaidula
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, Minnesota, USA
| | - Rohin Singh
- Mayo Clinic Alix School of Medicine, Phoenix, Arizona, USA
| | - Ian F. Parney
- Department of Neurological Surgery, Rochester, Minnesota, USA
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27
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Low JJW, Sulaiman SA, Johdi NA, Abu N. Immunomodulatory effects of extracellular vesicles in glioblastoma. Front Cell Dev Biol 2022; 10:996805. [DOI: 10.3389/fcell.2022.996805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 09/26/2022] [Indexed: 11/18/2022] Open
Abstract
Glioblastoma (GB) is a type of brain cancer that can be considered aggressive. Glioblastoma treatment has significant challenges due to the immune privilege site of the brain and the presentation of an immunosuppressive tumor microenvironment. Extracellular vesicles (EVs) are cell-secreted nanosized vesicles that engage in intercellular communication via delivery of cargo that may cause downstream effects such as tumor progression and recipient cell modulation. Although the roles of extracellular vesicles in cancer progression are well documented, their immunomodulatory effects are less defined. Herein, we focus on glioblastoma and explain the immunomodulatory effects of extracellular vesicles secreted by both tumor and immune cells in detail. The tumor to immune cells, immune cells to the tumor, and intra-immune cells extracellular vesicles crosstalks are involved in various immunomodulatory effects. This includes the promotion of immunosuppressive phenotypes, apoptosis, and inactivation of immune cell subtypes, which affects the central nervous system and peripheral immune system response, aiding in its survival and progression in the brain.
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28
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Tumor-Derived Extracellular Vesicles Predict Clinical Outcomes in Oligometastatic Prostate Cancer and Suppress Antitumor Immunity. Int J Radiat Oncol Biol Phys 2022; 114:725-737. [PMID: 35671867 PMCID: PMC9869345 DOI: 10.1016/j.ijrobp.2022.05.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 05/17/2022] [Accepted: 05/23/2022] [Indexed: 01/26/2023]
Abstract
PURPOSE SABR has demonstrated clinical benefit in oligometastatic prostate cancer. However, the risk of developing new distant metastatic lesions remains high, and only a minority of patients experience durable progression-free response. Therefore, there is a critical need to identify which patients will benefit from SABR alone versus combination SABR and systemic agents. Herein we provide, to our knowledge, the first proof-of-concept of circulating prostate cancer-specific extracellular vesicles (PCEVs) as a noninvasive predictor of outcomes in oligometastatic castration-resistant prostate cancer (omCRPC) treated with SABR. METHODS AND MATERIALS We analyzed the levels and kinetics of PCEVs in the peripheral blood of 79 patients with omCRPC at baseline and days 1, 7, and 14 after SABR using nanoscale flow cytometry and compared with baseline values from cohorts with localized and widely metastatic prostate cancer. The association of omCRPC PCEV levels with oncological outcomes was determined with Cox regression models. RESULTS Levels of PCEVs were highest in mCRPC followed by omCRPC and were lowest in localized prostate cancer. High PCEV levels at baseline predicted a shorter median time to distant recurrence (3.5 vs 6.6 months; P = .0087). After SABR, PCEV levels peaked on day 7, and median overall survival was significantly longer in patients with elevated PCEV levels (32.7 vs 27.6 months; P = .003). This suggests that pretreatment PCEV levels reflect tumor burden, whereas early changes in PCEV levels after treatment predict response to SABR. In contrast, radiomic features of 11C-choline positron emission tomography and computed tomography before and after SABR were not predictive of clinical outcomes. Interestingly, PCEV levels and peripheral tumor-reactive CD8 T cells (TTR; CD8+ CD11ahigh) were correlated. CONCLUSIONS This original study demonstrates that circulating PCEVs can serve as prognostic and predictive markers to SABR to identify patients with "true" omCRPC. In addition, it provides novel insights into the global crosstalk, mediated by PCEVs, between tumors and immune cells that leads to systemic suppression of immunity against CRPC. This work lays the foundation for future studies to investigate the underpinnings of metastatic progression and provide new therapeutic targets (eg, PCEVs) to improve SABR efficacy and clinical outcomes in treatment-resistant CRPC.
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29
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Westphal, M, Pantel K, Ricklefs FL, Maire C, Riethdorf S, Mohme M, Wikman H, Lamszus K. Circulating tumor cells and extracellular vesicles as liquid biopsy markers in neuro-oncology: prospects and limitations. Neurooncol Adv 2022; 4:ii45-ii52. [PMID: 36380859 PMCID: PMC9650476 DOI: 10.1093/noajnl/vdac015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
For many tumor entities, tumor biology and response to therapy are reflected by components that can be detected and captured in the blood stream. The so called “liquid biopsy” has been stratified over time into the analysis of circulating tumor cells (CTC), extracellular vesicles (EVs), and free circulating components such as cell-free nucleic acids or proteins. In neuro-oncology, two distinct areas need to be distinguished, intrinsic brain tumors and tumors metastatic to the brain. For intrinsic brain tumors, specifically glioblastoma, CTCs although present in low abundance, contain highly relevant, yet likely incomplete biological information for the whole tumor. For brain metastases, CTCs can have clinical relevance for patients especially with oligometastatic disease and brain metastasis in cancers like breast and lung cancer. EVs shed from the tumor cells and the tumor environment provide complementary information. Sensitive technologies have become available that are able to detect both, CTCs and EVs in the peripheral blood of patients with intrinsic and metastatic brain tumors despite the blood brain barrier. In reference to glioblastoma EVs, being shed by tumor cells and microenvironment and being more diffusible than CTCs may yield a more complete reflection of the whole tumor compared to low-abundance CTCs representing only a fraction of the multiclonal tumor heterogeneity. We here review the emerging aspects of CTCs and EVs as liquid biopsy biomarkers in neuro-oncology.
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Affiliation(s)
- Manfred Westphal,
- Department of Neurosurgery, Hans-Dietrich Herrmann Laboratory for Brain Tumor Research , Hamburg , Germany
| | - Klaus Pantel
- Institute for Tumor Biology, University of Hamburg Medical Center Eppendorf , Hamburg , Germany
| | - Franz L Ricklefs
- Department of Neurosurgery, Hans-Dietrich Herrmann Laboratory for Brain Tumor Research , Hamburg , Germany
| | - Cecile Maire
- Department of Neurosurgery, Hans-Dietrich Herrmann Laboratory for Brain Tumor Research , Hamburg , Germany
| | - Sabine Riethdorf
- Institute for Tumor Biology, University of Hamburg Medical Center Eppendorf , Hamburg , Germany
| | - Malte Mohme
- Department of Neurosurgery, Hans-Dietrich Herrmann Laboratory for Brain Tumor Research , Hamburg , Germany
| | - Harriet Wikman
- Institute for Tumor Biology, University of Hamburg Medical Center Eppendorf , Hamburg , Germany
| | - Katrin Lamszus
- Department of Neurosurgery, Hans-Dietrich Herrmann Laboratory for Brain Tumor Research , Hamburg , Germany
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30
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Pang L, Khan F, Heimberger AB, Chen P. Mechanism and therapeutic potential of tumor-immune symbiosis in glioblastoma. Trends Cancer 2022; 8:839-854. [PMID: 35624002 PMCID: PMC9492629 DOI: 10.1016/j.trecan.2022.04.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 04/25/2022] [Accepted: 04/26/2022] [Indexed: 12/20/2022]
Abstract
Glioblastoma (GBM) is the most aggressive and lethal form of brain tumor in human adults. Myeloid-lineage cells, including macrophages, microglia, myeloid-derived suppressor cells (MDSCs), and neutrophils, are the most frequent types of cell in the GBM tumor microenvironment (TME) that contribute to tumor progression. Emerging experimental evidence indicates that symbiotic interactions between cancer cells and myeloid cells are critical for tumor growth and immunotherapy resistance in GBM. In this review, we discuss the molecular mechanisms whereby cancer cells shape a myeloid cell-mediated immunosuppressive TME and, reciprocally, how such myeloid cells affect tumor progression and immunotherapy efficiency in GBM. Moreover, we highlight tumor-T cell symbiosis and summarize immunotherapeutic strategies intercepting this co-dependency in GBM.
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Affiliation(s)
- Lizhi Pang
- Department of Neurological Surgery, Lou and Jean Malnati Brain Tumor Institute, Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Fatima Khan
- Department of Neurological Surgery, Lou and Jean Malnati Brain Tumor Institute, Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Amy B Heimberger
- Department of Neurological Surgery, Lou and Jean Malnati Brain Tumor Institute, Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Peiwen Chen
- Department of Neurological Surgery, Lou and Jean Malnati Brain Tumor Institute, Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
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Exosome biopotentiated hydrogel restores damaged skeletal muscle in a porcine model of stress urinary incontinence. NPJ Regen Med 2022; 7:58. [PMID: 36175423 PMCID: PMC9523025 DOI: 10.1038/s41536-022-00240-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 08/05/2022] [Indexed: 11/28/2022] Open
Abstract
Urinary incontinence afflicts up to 40% of adult women in the United States. Stress urinary incontinence (SUI) accounts for approximately one-third of these cases, precipitating ~200,000 surgical procedures annually. Continence is maintained through the interplay of sub-urethral support and urethral sphincter coaptation, particularly during activities that increase intra-abdominal pressure. Currently, surgical correction of SUI focuses on the re-establishment of sub-urethral support. However, mesh-based repairs are associated with foreign body reactions and poor localized tissue healing, which leads to mesh exposure, prompting the pursuit of technologies that restore external urethral sphincter function and limit surgical risk. The present work utilizes a human platelet-derived CD41a and CD9 expressing extracellular vesicle product (PEP) enriched for NF-κB and PD-L1 and derived to ensure the preservation of lipid bilayer for enhanced stability and compatibility with hydrogel-based sustained delivery approaches. In vitro, the application of PEP to skeletal muscle satellite cells in vitro drove proliferation and differentiation in an NF-κB-dependent fashion, with full inhibition of impact on exposure to resveratrol. PEP biopotentiation of collagen-1 and fibrin glue hydrogel achieved sustained exosome release at 37 °C, creating an ultrastructural “bead on a string” pattern on scanning electron microscopy. Initial testing in a rodent model of latissimus dorsi injury documented activation of skeletal muscle proliferation of healing. In a porcine model of stress urinary incontinence, delivery of PEP-biopotentiated collagen-1 induced functional restoration of the external urethral sphincter. The histological evaluation found that sustained PEP release was associated with new skeletal muscle formation and polarization of local macrophages towards the regenerative M2 phenotype. The results provided herein serve as the first description of PEP-based biopotentiation of hydrogels implemented to restore skeletal muscle function and may serve as a promising approach for the nonsurgical management of SUI.
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32
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Himes BT, Fain CE, Tritz ZP, Nesvick CL, Jin-Lee HJ, Geiger PA, Peterson TE, Jung MY, Parney IF. Use of heparin to rescue immunosuppressive monocyte reprogramming by glioblastoma-derived extracellular vesicles. J Neurosurg 2022; 138:1291-1301. [PMID: 36115048 DOI: 10.3171/2022.6.jns2274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 06/17/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The profound immunosuppression found in glioblastoma (GBM) patients is a critical barrier to effective immunotherapy. Multiple mechanisms of tumor-mediated immune suppression exist, and the induction of immunosuppressive monocytes such as myeloid-derived suppressor cells (MDSCs) is increasingly appreciated as a key part of this pathology. GBM-derived extracellular vesicles (EVs) can induce the formation of MDSCs. The authors sought to identify the molecular consequences of these interactions in myeloid cells in order to identify potential targets that could pharmacologically disrupt GBM EV-monocyte interaction as a means to ameliorate tumor-mediated immune suppression. Heparin-sulfate proteoglycans (HSPGs) are a general mechanism by which EVs come into association with their target cells, and soluble heparin has been shown to interfere with EV-HSPG interactions. The authors sought to assess the efficacy of heparin treatment for mitigating the effects of GBM EVs on the formation of MDSCs. METHODS GBM EVs were collected from patient-derived cell line cultures via staged ultracentrifugation and cocultured with monocytes collected from apheresis cones from healthy blood donors. RNA was isolated from EV-conditioned and unconditioned monocytes after 72 hours of coculture, and RNA-sequencing analysis performed. For the heparin treatment studies, soluble heparin was added at the time of EV-monocyte coculture and flow cytometry analysis was performed 72 hours later. After the initial EV-monocyte coculture period, donor-matched T-cell coculture studies were performed by adding fluorescently labeled and stimulated T cells for 5 days of coculture. RESULTS Transcriptomic analysis of GBM EV-treated monocytes demonstrated downregulation of several important immunological and metabolic pathways, with upregulation of the pathways associated with synthesis of cholesterol and HSPG. Heparin treatment inhibited association between GBM EVs and monocytes in a dose-dependent fashion, which resulted in a concomitant reduction in MDSC formation (p < 0.01). The authors further demonstrated that reduced MDSC formation resulted in a partial rescue of immune suppression, as measured by effects on activated donor-matched T cells (p < 0.05). CONCLUSIONS The authors demonstrated that GBM EVs induce broad but reproducible reprogramming in monocytes, with enrichment of pathways that may portend an immunosuppressive phenotype. The authors further demonstrated that GBM EV-monocyte interactions are potentially druggable targets for overcoming tumor-mediated immune suppression, with heparin inhibition of EV-monocyte interactions demonstrating proof of principle.
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Affiliation(s)
| | - Cori E Fain
- 2Department of Immunology, Mayo Clinic, Rochester, Minnesota
| | | | | | | | | | | | | | - Ian F Parney
- 1Department of Neurologic Surgery and.,2Department of Immunology, Mayo Clinic, Rochester, Minnesota
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33
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Zhang C, Zhou Y, Gao Y, Zhu Z, Zeng X, Liang W, Sun S, Chen X, Wang H. Radiated glioblastoma cell-derived exosomal circ_0012381 induce M2 polarization of microglia to promote the growth of glioblastoma by CCL2/CCR2 axis. J Transl Med 2022; 20:388. [PMID: 36058942 PMCID: PMC9441045 DOI: 10.1186/s12967-022-03607-0] [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: 06/23/2022] [Accepted: 08/23/2022] [Indexed: 11/10/2022] Open
Abstract
Background Radiotherapy is the primary therapeutic option for glioblastoma. Some studies proved that radiotherapy increased the release of exosomes from cells. The mechanism by which these exosomes modify the phenotype of microglia in the tumor microenvironment to further determine the fate of irradiated glioblastoma cells remains to be elucidated. Methods We erected the co-culture system of glioblastoma cells and microglia. After radiation, we analyzing the immunophenotype of microglia and the proliferation of radiated glioblastoma cells. By whole transcriptome sequencing, we analyzed of circRNAs in exosomes from glioblastoma cells and microglia. We used some methods, which included RT-PCR, dual-luciferase reporter, et al., to identify how circ_0012381 from radiated glioblastoma cell-derived exosomes regulated the immunophenotype of microglia to further affect the proliferation of radiated glioblastoma cells. Results Radiated glioblastoma cell-derived exosomes markedly induced M2 microglia polarization. These M2-polarized microglia promoted the proliferation of irradiated glioblastoma cells. Circ_0012381 expression was increased in the irradiated glioblastoma cells, and circ_0012381 entered the microglia via exosomes. Circ_0012381 induced M2 microglia polarization by sponging with miR-340-5p to increase ARG1 expression. M2-polarized microglia suppressed phagocytosis and promoted the growth of the irradiated glioblastoma cells by CCL2/CCR2 axis. Compared with the effects of radiotherapy alone, the inhibition of exosomes significantly inhibited the growth of irradiated glioblastoma cells in a zebrafish model. Conclusions Our data suggested that the inhibition of exosome secretion might represent a potential therapeutic strategy to increase the efficacy of radiotherapy in patients with glioblastoma. Supplementary Information The online version contains supplementary material available at 10.1186/s12967-022-03607-0.
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Affiliation(s)
- Chunzhi Zhang
- Department of Radiation Oncology, Tianjin Hospital, Tianjin, 300211, China.
| | - Yuan Zhou
- Tianjin Medical University, Tianjin, 300070, China
| | - Ya Gao
- Department of Pathogenic Biology, Basic Medical College, Tianjin Medical University, Tianjin, 300070, China
| | - Ze Zhu
- Department of Pathogenic Biology, Basic Medical College, Tianjin Medical University, Tianjin, 300070, China
| | - Xianliang Zeng
- Department of Radiation Oncology, Tianjin Hospital, Tianjin, 300211, China
| | - Weizi Liang
- Department of Radiation Oncology, Tianjin Hospital, Tianjin, 300211, China
| | - Songwei Sun
- Department of Radiation Oncology, Tianjin Hospital, Tianjin, 300211, China
| | - Xiuli Chen
- Department of Radiation Oncology, Tianjin Hospital, Tianjin, 300211, China
| | - Hu Wang
- Department of Neuro-Surgery, Tianjin Huanhu Hospital, Tianjin, 300350, China
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Tang Q, Yang S, He G, Zheng H, Zhang S, Liu J, Wei S, Fan Q, Peng X, Li X, Zhang D, Yang L, Li H. Tumor-derived exosomes in the cancer immune microenvironment and cancer immunotherapy. Cancer Lett 2022; 548:215823. [PMID: 35835409 DOI: 10.1016/j.canlet.2022.215823] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 07/04/2022] [Accepted: 07/07/2022] [Indexed: 12/19/2022]
Abstract
Tumor-derived exosomes (TDEs) are key immune regulators in the tumor microenvironment. They have been shown to reshape the immune microenvironment and prevent antitumor immune responses via their immunosuppressive cargo, thereby determining responsiveness to cancer therapy. By delivering suppressive cargo to the immune cells, TDEs directly or indirectly influence the functions and antitumor activities of immune cells. TDE-based therapy is emerging as a cutting-edge and promising strategy for inhibiting tumor progression or enhancing antitumor immunity. Therefore, in this study, we reviewed the mechanism by which TDEs regulate immune cells and their applications in immunotherapy.
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Affiliation(s)
- Qiushi Tang
- Chinese Journal of Practical Surgery, China Medical University, Shenyang, 110001, China
| | - Shuo Yang
- Department of General Surgery, The Fourth Affiliated Hospital, China Medical University, Shenyang, 110032, China; Shenyang Clinical Medical Research Center for Diagnosis, Treatment and Health Management of Early Digestive Cancer, Shenyang, 110032, China
| | - Guangpeng He
- Department of General Surgery, The Fourth Affiliated Hospital, China Medical University, Shenyang, 110032, China; Shenyang Clinical Medical Research Center for Diagnosis, Treatment and Health Management of Early Digestive Cancer, Shenyang, 110032, China
| | - Hongyu Zheng
- Department of General Surgery, The Fourth Affiliated Hospital, China Medical University, Shenyang, 110032, China; Shenyang Clinical Medical Research Center for Diagnosis, Treatment and Health Management of Early Digestive Cancer, Shenyang, 110032, China
| | - Sheng Zhang
- Department of General Surgery, The Fourth Affiliated Hospital, China Medical University, Shenyang, 110032, China; Shenyang Clinical Medical Research Center for Diagnosis, Treatment and Health Management of Early Digestive Cancer, Shenyang, 110032, China
| | - Jiaxing Liu
- Department of General Surgery, The Fourth Affiliated Hospital, China Medical University, Shenyang, 110032, China; Shenyang Clinical Medical Research Center for Diagnosis, Treatment and Health Management of Early Digestive Cancer, Shenyang, 110032, China
| | - Shibo Wei
- Department of General Surgery, The Fourth Affiliated Hospital, China Medical University, Shenyang, 110032, China; Shenyang Clinical Medical Research Center for Diagnosis, Treatment and Health Management of Early Digestive Cancer, Shenyang, 110032, China
| | - Qing Fan
- Department of General Surgery, The Fourth Affiliated Hospital, China Medical University, Shenyang, 110032, China; Shenyang Clinical Medical Research Center for Diagnosis, Treatment and Health Management of Early Digestive Cancer, Shenyang, 110032, China
| | - Xueqiang Peng
- Department of General Surgery, The Fourth Affiliated Hospital, China Medical University, Shenyang, 110032, China; Shenyang Clinical Medical Research Center for Diagnosis, Treatment and Health Management of Early Digestive Cancer, Shenyang, 110032, China
| | - Xinyu Li
- Department of General Surgery, The Fourth Affiliated Hospital, China Medical University, Shenyang, 110032, China; Shenyang Clinical Medical Research Center for Diagnosis, Treatment and Health Management of Early Digestive Cancer, Shenyang, 110032, China
| | - Dewei Zhang
- Department of General Surgery, The Fourth Affiliated Hospital, China Medical University, Shenyang, 110032, China; Shenyang Clinical Medical Research Center for Diagnosis, Treatment and Health Management of Early Digestive Cancer, Shenyang, 110032, China
| | - Liang Yang
- Department of General Surgery, The Fourth Affiliated Hospital, China Medical University, Shenyang, 110032, China; Shenyang Clinical Medical Research Center for Diagnosis, Treatment and Health Management of Early Digestive Cancer, Shenyang, 110032, China.
| | - Hangyu Li
- Department of General Surgery, The Fourth Affiliated Hospital, China Medical University, Shenyang, 110032, China; Shenyang Clinical Medical Research Center for Diagnosis, Treatment and Health Management of Early Digestive Cancer, Shenyang, 110032, China.
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Small extracellular vesicles derived from PD-L1-modified mesenchymal stem cell promote Tregs differentiation and prolong allograft survival. Cell Tissue Res 2022; 389:465-481. [PMID: 35688948 DOI: 10.1007/s00441-022-03650-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 06/02/2022] [Indexed: 11/02/2022]
Abstract
We aimed to explore whether programmed cell death protein-1 ligand (PD-L1) modification on small extracellular vesicles (sEVs) could promote T regulatory cells (Tregs) differentiation. In this study, it was confirmed that under physiological conditions, PD-L1 expression was minimal in the MSCs and absent in the MSC-sEVs. A vector harboring the PD-L1 gene was constructed and transfected into bone marrow mesenchymal stem cells (BM-MSCs). By extracting the sEVs of these modified BM-MSCs and monitoring the expression of the PD-L1 protein, however, PD-L1 expression was substantially increased in the MSCs and concentrated in the sEVs. Then, the rat naïve CD4 + T cells were cocultured with the sEVs derived from the PD-L1-modified MSCs (sEVsPD-L1). By flow cytometry, a higher percentage of Tregs and anti-inflammatory downstream cytokines (including IL-2, IFN-γ, TGF-β, IL-10) was detected in the sEVsPD-L1 group than that in the control group treated by either sEVs in wild type, modified by empty vector, or blank control. Suppressive effect on CD4 + T cell proliferation serves as additional evidence to support the immunoregulation capacity of sEVsPD-L1. The animal model of vascularized composite allograft further confirmed that PD-L1-modified sEVs induce an immune tolerance, by clinically observation, histopathology, T cell fate and cell product. In conclusion, sEVsPD-L1 efficiently promotes Treg cell differentiation in vitro and in vivo, which suggests their therapeutic potential in the treatment of allograft rejection.
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Rahman M, Olson I, Mansour M, Carlstrom LP, Sutiwisesak R, Saber R, Rajani K, Warrington AE, Howard A, Schroeder M, Chen S, Decker PA, Sananikone EF, Zhu Y, Tchkonia T, Parney IF, Burma S, Brown D, Rodriguez M, Sarkaria JN, Kirkland JL, Burns TC. Selective Vulnerability of Senescent Glioblastoma Cells to BCL-XL Inhibition. Mol Cancer Res 2022; 20:938-948. [PMID: 35191501 PMCID: PMC9196639 DOI: 10.1158/1541-7786.mcr-21-0029] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 12/19/2021] [Accepted: 02/14/2022] [Indexed: 01/27/2023]
Abstract
Glioblastoma (GBM) is a rapidly fatal malignancy typically treated with radiation and temozolomide (TMZ), an alkylating chemotherapeutic. These cytotoxic therapies cause oxidative stress and DNA damage, yielding a senescent-like state of replicative arrest in surviving tumor cells. Unfortunately, recurrence is inevitable and may be driven by surviving tumor cells eventually escaping senescence. A growing number of so-called "senolytic" drugs have been recently identified that are defined by their ability to selectively eliminate senescent cells. A growing inventory of senolytic drugs is under consideration for several diseases associated with aging, inflammation, DNA damage, as well as cancer. Ablation of senescent tumor cells after radiation and chemotherapy could help mitigate recurrence by decreasing the burden of residual tumor cells at risk of recurrence. This strategy has not been previously explored for GBM. We evaluated a panel of 10 previously described senolytic drugs to determine whether any could exhibit selective activity against human GBM persisting after exposure to radiation or TMZ. Three of the 10 drugs have known activity against BCL-XL and preferentially induced apoptosis in radiated or TMZ-treated glioma. This senolytic activity was observed in 12 of 12 human GBM cell lines. Efficacy could not be replicated with BCL-2 inhibition or senolytic agents acting against other putative senolytic targets. Knockdown of BCL-XL decreased survival of radiated GBM cells, whereas knockdown of BCL-2 or BCL-W yielded no senolytic effect. IMPLICATIONS These findings imply that molecularly heterogeneous GBM lines share selective senescence-induced BCL-XL dependency increase the significance and translational relevance of the senolytic therapy for latent glioma.
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Affiliation(s)
- Masum Rahman
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota
| | - Ian Olson
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota
| | - Moustafa Mansour
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota
| | | | - Rujapope Sutiwisesak
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota
- Department of Physiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Rehan Saber
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota
| | - Karishma Rajani
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota
| | | | - Adam Howard
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota
| | - Mark Schroeder
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota
| | - Sisi Chen
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota
| | - Paul A. Decker
- Department of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, Minnesota
| | | | - Yi Zhu
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, Minnesota
| | - Tamar Tchkonia
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, Minnesota
| | - Ian F. Parney
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota
| | - Sandeep Burma
- Department of Neurosurgery, Department of Biochemistry and Structural Biology, University of Texas Health Science Center, San Antonio, Texas
| | - Desmond Brown
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota
| | - Moses Rodriguez
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota
| | - Jann N. Sarkaria
- Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota
| | - James L. Kirkland
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, Minnesota
| | - Terry C. Burns
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota
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Liu D, Cheng Y, Qiao S, Liu M, Ji Q, Zhang BL, Mei QB, Zhou S. Nano-Codelivery of Temozolomide and siPD-L1 to Reprogram the Drug-Resistant and Immunosuppressive Microenvironment in Orthotopic Glioblastoma. ACS NANO 2022; 16:7409-7427. [PMID: 35549164 DOI: 10.1021/acsnano.1c09794] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Glioblastoma (GBM) is an invasive cancer with high mortality in central nervous system. Resistance to temozolomide (TMZ) and immunosuppressive microenvironment lead to low outcome of the standardized treatment for GBM. In this study, a 2-deoxy-d-glucose modified lipid polymer nanoparticle loaded with TMZ and siPD-L1 (TMZ/siPD-L1@GLPN/dsb) was prepared to reprogram the TMZ-resistant and immunosuppressive microenvironment in orthotopic GBM. TMZ/siPD-L1@GLPN/dsb simultaneously delivered a large amount of TMZ and siPD-L1 to the deep area of the orthotopic TMZ-resistant GBM tissue. By inhibiting PD-L1 protein expression, TMZ/siPD-L1@GLPN/dsb markedly augmented the percentage of CD3+CD8+IFN-γ+ cells (Teff cells) and reduced the percentage of CD4+CD25+FoxP3+ cells (Treg cells) in orthotopic TMZ-resistant GBM tissue, which enhanced T-cell mediated cytotoxicity on orthotopic TMZ-resistant GBM. Moreover, TMZ/siPD-L1@GLPN/dsb obviously augmented the sensitivity of orthotopic TMZ-resistant GBM to TMZ through decreasing the protein expression of O6-methyl-guanine-DNA methyltransferase (MGMT) in TMZ-resistant GBM cells. Thus, TMZ/siPD-L1@GLPN/dsb markedly restrained the growth of orthotopic TMZ-resistant GBM and extended the survival time of orthotopic GBM rats through reversing a TMZ-resistant and immunosuppressive microenvironment. TMZ/siPD-L1@GLPN/dsb shows potential application to treat orthotopic TMZ-resistant GBM.
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Affiliation(s)
- Daozhou Liu
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
| | - Ying Cheng
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
| | - Sai Qiao
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
| | - Miao Liu
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
| | - Qifeng Ji
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
| | - Bang-Le Zhang
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
| | - Qi-Bing Mei
- Key Laboratory of Gastrointestinal Pharmacology of Chinese Materia Medica of the State Administration of Traditional Chinese Medicine, Fourth Military Medical University, Xi'an 710032, China
| | - Siyuan Zhou
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
- Key Laboratory of Gastrointestinal Pharmacology of Chinese Materia Medica of the State Administration of Traditional Chinese Medicine, Fourth Military Medical University, Xi'an 710032, China
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Pang L, Khan F, Dunterman M, Chen P. Pharmacological targeting of the tumor–immune symbiosis in glioblastoma. Trends Pharmacol Sci 2022; 43:686-700. [PMID: 35534356 PMCID: PMC9288491 DOI: 10.1016/j.tips.2022.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 04/05/2022] [Accepted: 04/08/2022] [Indexed: 10/18/2022]
Abstract
Glioblastoma (GBM) is the most common and highly lethal form of primary brain tumor in adults. The median survival of GBM patients is approximately 14-16 months despite multimodal therapies. Emerging evidence has substantiated the critical role of symbiotic interactions between GBM cells and noncancerous immune cells (e.g., myeloid cells and T cells) in regulating tumor progression and therapy resistance. Approaches to target the tumor-immune symbiosis have emerged as a promising therapeutic strategy for GBM. Here, we review the recent developments for pharmacological targeting of the GBM-immune symbiosis and highlight the role of such strategies to improve the effectiveness of immunotherapies in GBM.
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Pancholi S, Tripathi A, Bhan A, Acharya MM, Pillai P. Emerging Concepts on the Role of Extracellular Vesicles and Its Cargo Contents in Glioblastoma-Microglial Crosstalk. Mol Neurobiol 2022; 59:2822-2837. [PMID: 35212938 PMCID: PMC10058057 DOI: 10.1007/s12035-022-02752-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 01/17/2022] [Indexed: 02/06/2023]
Abstract
Glioblastoma multiforme is the most common, highly aggressive malignant brain tumor which is marked by highest inter- and intra-tumoral heterogeneity. Despite, immunotherapy, and combination therapies developed; the clinical trials often result into large number of failures. Often cancer cells are known to communicate with surrounding cells in tumor microenvironment (TME). Extracellular vesicles (EVs) consisting of diverse cargo mediates this intercellular communication and is believed to modulate the immune function against GBM. Tumor-associated microglia (TAM), though being the resident innate immune cell of CNS, is known to attain pro-tumorigenic M2 phenotype, and this immunomodulation is aided by extracellular vesicle-mediated transfer of oncogenic, immunomodulatory molecules. Besides, oncogenic proteins, long non-coding RNAs (lncRNAs), are believed to carry oncogenic potential, and therefore, understanding the mechanism leading to microglial dysregulation mediated by GBM-derived extracellular vesicle (GDEV) lncRNAs becomes crucial. This review focuses on current understanding of role of GDEV and lncRNA in microglial dysfunction and its potential as a therapeutic target.
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Affiliation(s)
- Sangati Pancholi
- Division of Neurobiology, Department of Zoology, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India
| | - Ashutosh Tripathi
- Louis A. Faillace, MD, Department of Psychiatry and Behavioral Sciences at McGovern Medical School, The University of Texas Health Science Centre at Houston (UT Health), Houston, TX, USA
| | - Arunoday Bhan
- Department of Surgery, City of Hope Medical Centre, Duarte, CA, USA
| | - Munjal M Acharya
- Department of Anatomy and Neurobiology, University of California, Irvine, CA, USA.
- Department of Radiation Oncology, University of California, Irvine, CA, USA.
| | - Prakash Pillai
- Division of Neurobiology, Department of Zoology, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India.
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Wei J, Zhu K, Chen Z, Yang Z, Yang K, Wang Z, Zong S, Cui Y. Triple-color fluorescence co-localization of PD-L1-overexpressing cancer exosomes. Mikrochim Acta 2022; 189:182. [PMID: 35394232 DOI: 10.1007/s00604-022-05278-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 03/16/2022] [Indexed: 11/28/2022]
Abstract
Programed cell death ligand 1 (PD-L1) is a protein biomarker overexpressed on exosomes derived from tumor cells. It plays an important role in tumor diagnosis, screening, evaluation of therapeutic efficacy, and prognosis. In this study, a facile method is presented to detect PD-L1-overexpressing cancer exosomes with high specificity and sensitivity. First, gold nanospheres (GNSs) were attached to the bottom of an eight-well chambered slide by electrostatic adsorption, forming the detection substrate. Then, Cy5-labeled CD63 aptamers (i.e., the capture probes) were modified on the GNSs by Au-S bond. After adding samples containing target exosomes which were stained by membrane dyes DiI in advance, FAM-labeled PD-L1 aptamers (i.e., the immunoprobes) were added to recognize PD-L1 on the target exosomes. By triple-color fluorescence co-localization (TFC) of the Cy5, DiI, and FAM channels, highly sensitive and reliable detection of the PD-L1-overexpressing exosomes was achieved in the concentration range 7.78 × 101 to 7.78 × 104 particles/mL with a detection limit down to 6 particles/mL. The advantages of the proposed detection method include the following; first, the detection substrate is easy to prepare and convenient to clean. Second, the TFC strategy can completely exclude nonspecific reaction sites and thus significantly improves the accuracy. Such a facile and reliable detection method holds a great potential in exosome-based cancer theranostics. In this paper, we proposed a triple-color fluorescence co-localization (TFC) strategy to significantly improve the reliability of exosome detection and the detection substrate is easy to prepare and convenient to clean. In addition, the LOD is down to 6 particles/mL, which is quite low compared with other detection methods.
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Affiliation(s)
- Jinxiu Wei
- Advanced Photonics Center, Southeast University, Nanjing, 210096, Jiangsu, China
| | - Kai Zhu
- Advanced Photonics Center, Southeast University, Nanjing, 210096, Jiangsu, China
| | - Zengwei Chen
- Advanced Photonics Center, Southeast University, Nanjing, 210096, Jiangsu, China
| | - Zhaoyan Yang
- Advanced Photonics Center, Southeast University, Nanjing, 210096, Jiangsu, China
| | - Kuo Yang
- Advanced Photonics Center, Southeast University, Nanjing, 210096, Jiangsu, China
| | - Zhuyuan Wang
- Advanced Photonics Center, Southeast University, Nanjing, 210096, Jiangsu, China
| | - Shenfei Zong
- Advanced Photonics Center, Southeast University, Nanjing, 210096, Jiangsu, China.
| | - Yiping Cui
- Advanced Photonics Center, Southeast University, Nanjing, 210096, Jiangsu, China.
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41
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Jung MY, Aibaidula A, Brown DA, Himes BT, Cumba Garcia LM, Parney IF. Superinduction of immunosuppressive glioblastoma extracellular vesicles by IFN-γ through PD-L1 and IDO1. Neurooncol Adv 2022; 4:vdac017. [PMID: 35990703 PMCID: PMC9389426 DOI: 10.1093/noajnl/vdac017] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Glioblastoma (GBM), the most common primary brain tumor, has a median survival of 15-16 months. Immunotherapy is promising but GBM-mediated immunosuppression remains a barrier. GBMs express the interferon-gamma (IFN-γ)-responsive immunosuppressive molecules PD-L1 and IDO1. Extracellular vesicles (EVs) have also been implicated in GBM-mediated immunosuppression, in part through PD-L1. We therefore sought to determine if GBM IFN-γ exposure increased GBM EV-mediated immunosuppression and mechanisms underlying this.
Methods
Human GBM-derived cells were cultured in the presence/absence of IFN-γ. EV’s were harvested. PD-L1, IDO1, and EV-associated protein expression was assessed. GBM EV’s (+/-IFN-γ) were cultured with healthy donor monocytes. Immunosuppressive myeloid-derived suppressor cell (MDSC) and non-classical monocyte (NCM) frequency was determined. Impact of GBM (+/-IFN-γ) EV-treated monocytes on CD3/CD28-mediated T cell proliferation was assessed. The impact of PD-L1 and IDO1 knockdown in GBM EV’s in this system was evaluated.
Results
IFN-γ exposure increased PD-L1 and IDO1 expression in GBM cells and EV’s without altering EV size or frequency. IFN-γ-exposed GBM EVs induced more MDSC and NCM differentiation in monocytes and these monocytes caused more T cell inhibition than IFN-γ-naive GBM EVs. PD-L1 and/or IDO1 knockdown in GBM cells abrogated the immunosuppressive effects of IFN-γ-exposed GBM EVs on monocytes.
Conclusions
IFN-γ exposure such as might occur during an anti-tumor immune response results in superinduction of GBM EVs’ baseline immunosuppressive effects on monocytes. These effects are mediated by increased PD-L1 and IDO1 expression in GBM EV’s. This data highlights mechanisms of GBM EV-mediated immunosuppression and identifies therapeutic targets (PD-L1, IDO1) to reverse these effects.
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Affiliation(s)
- Mi-Yeon Jung
- Department of Neurological Surgery, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
| | - Abudumijiti Aibaidula
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Desmond A Brown
- Department of Neurological Surgery, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
| | - Benjamin T Himes
- Department of Neurological Surgery, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
- Department of Immunology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
| | - Luz M Cumba Garcia
- Department of Neurological Surgery, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
- Department of Immunology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
| | - Ian F Parney
- Corresponding Author: Ian F. Parney, MD, PhD, Department of Neurological Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA ()
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Li X, Zhong J, Deng X, Guo X, Lu Y, Lin J, Huang X, Wang C. Targeting Myeloid-Derived Suppressor Cells to Enhance the Antitumor Efficacy of Immune Checkpoint Blockade Therapy. Front Immunol 2022; 12:754196. [PMID: 35003065 PMCID: PMC8727744 DOI: 10.3389/fimmu.2021.754196] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 11/30/2021] [Indexed: 12/11/2022] Open
Abstract
Myeloid-derived suppressor cells (MDSCs) are a heterogeneous population of immature myeloid cells that are activated under pathological conditions, such as cancer, or mature myeloid cells that are converted immune-suppressive cells via tumor-derived exosomes, and potently support the tumor processes at different levels. Currently, multiple studies have demonstrated that MDSCs induce immune checkpoint blockade (ICB) therapy resistance through their contribution to the immunosuppressive network in the tumor microenvironment. In addition, non-immunosuppressive mechanisms of MDSCs such as promotion of angiogenesis and induction of cancer stem cells also exert a powerful role in tumor progression. Thus, MDSCs are potential therapeutic targets to enhance the antitumor efficacy of ICB therapy in cases of multiple cancers. This review focuses on the tumor-promoting mechanism of MDSCs and provides an overview of current strategies that target MDSCs with the objective of enhancing the antitumor efficacy of ICB therapy.
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Affiliation(s)
- Xueyan Li
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangdong Geriatric Institute, Guangzhou, China
| | - Jiahui Zhong
- Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xue Deng
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Xuan Guo
- School of Medicine, South China University of Technology, Guangzhou, China
| | - Yantong Lu
- Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Juze Lin
- Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangdong Geriatric Institute, Guangzhou, China
| | - Xuhui Huang
- Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangdong Geriatric Institute, Guangzhou, China
| | - Changjun Wang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangdong Geriatric Institute, Guangzhou, China
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43
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Pediatric brain tumor cell lines exhibit miRNA-depleted, Y RNA-enriched extracellular vesicles. J Neurooncol 2022; 156:269-279. [PMID: 34984645 DOI: 10.1007/s11060-021-03914-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 11/25/2021] [Indexed: 10/19/2022]
Abstract
BACKGROUND Medulloblastoma (MB) and diffuse infiltrative pontine glioma (DIPG) are malignant pediatric tumors. Extracellular vesicles (EVs) and their bioactive cargoes have been implicated in tumorigenesis. Most studies have focused on adult tumors, therefore the role of EVs and the noncoding RNA (ncRNA) landscape in pediatric brain tumors is not fully characterized. The overall aim of this pilot study was to isolate EVs from MB and DIPG patient-derived cell lines and to explore the small ncRNA transcriptome. METHODS EVs from 3 DIPG and 4 MB patient-derived cell lines were analyzed. High-throughput next generation sequencing interrogated the short non-coding RNA (ncRNA) transcriptome. Known and novel miRNAs were quantified. Differential expression analysis, in silico target prediction, and functional gene enrichment were performed. RESULTS EV secretomes from MB and DIPG patient-derived cell lines demonstrated discrete ncRNA biotypes. Notably, miRNAs were depleted and Y RNAs were enriched in EV samples. Hierarchical cluster analysis revealed high discrimination in miRNA expression between DIPG and MB cell lines and RNA-Seq identified novel miRNAs not previously implicated in MB or DIPG pathogenesis. Known and putative target genes of dysregulated miRNAs were identified. Functional annotation analysis of the target genes for differentially expressed EV-and parental-derived miRNAs revealed significant cancer-related pathway involvement. CONCLUSIONS This hypothesis-generating study demonstrated that pediatric brain tumor-derived cell lines secrete EVs comprised of various ncRNA cargoes. Validation of these findings in patient samples may provide new insights into the pediatric brain tumor microenvironment and identification of novel therapeutic candidates.
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Anti-Cancer Role and Therapeutic Potential of Extracellular Vesicles. Cancers (Basel) 2021; 13:cancers13246303. [PMID: 34944923 PMCID: PMC8699603 DOI: 10.3390/cancers13246303] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 12/02/2021] [Accepted: 12/11/2021] [Indexed: 02/07/2023] Open
Abstract
Cell-cell communication is an important mechanism in biological processes. Extracellular vesicles (EVs), also referred to as exosomes, microvesicles, and prostasomes, are microvesicles secreted by a variety of cells. EVs are nanometer-scale vesicles composed of a lipid bilayer and contain biological functional molecules, such as microRNAs (miRNAs), mRNAs, and proteins. In this review, "EVs" is used as a comprehensive term for vesicles that are secreted from cells. EV research has been developing over the last four decades. Many studies have suggested that EVs play a crucial role in cell-cell communication. Importantly, EVs contribute to cancer malignancy mechanisms such as carcinogenesis, proliferation, angiogenesis, metastasis, and escape from the immune system. EVs derived from cancer cells and their microenvironments are diverse, change in nature depending on the condition. As EVs are thought to be secreted into body fluids, they have the potential to serve as diagnostic markers for liquid biopsy. In addition, cells can encapsulate functional molecules in EVs. Hence, the characteristics of EVs make them suitable for use in drug delivery systems and novel cancer treatments. In this review, the potential of EVs as anti-cancer therapeutics is discussed.
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Rasihashemi SZ, Rezazadeh Gavgani E, Majidazar R, Seraji P, Oladghaffari M, Kazemi T, Lotfinejad P. Tumor-derived exosomal PD-L1 in progression of cancer and immunotherapy. J Cell Physiol 2021; 237:1648-1660. [PMID: 34825383 DOI: 10.1002/jcp.30645] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 10/19/2021] [Accepted: 11/09/2021] [Indexed: 12/14/2022]
Abstract
Cancer is a gravely important health issue all over the world and has been spreading fast. In recent years immune checkpoint treatment options have been used extensively as a primary line of treatment for different cancer types. PD-1 and its ligand, PD-L1, are members of the immune-checkpoints superfamily. Anti-PD-L1 and anti-PD-1 antibodies have shown efficacy against different cancer types, but fewer than 30% of patients have shown robust therapeutic responses and, therefore, it is hypothesized that exosomal PD-L1 is the mechanism to blame for failure in primary immune checkpoint therapy. The identical membrane topology of exosomal PD-L1 with tumor cell membrane-type provides the possibility to mimic immunosuppressive effects of tumor cell membrane PD-L1. In this review, it is discussed whether exosomal PD-L1 binds to antibodies and hence resistance to immunotherapy will be developed, and targeting exosome biogenesis inhibition can provide a new strategy to overcome tumor resistance to anti-PD-L1 therapy. Diagnostic and prognostic values of exosomal PD-L1 in different cancer types are discussed. Multiple clinical studies conclude that the level of tumor-derived exosomes (TEXs) as a biomarker for diagnosis could distinguish cancer patients from healthy controls. Elevated exosomal PD-L1 levels may be predictive of advanced disease stages, cancer metastasis, lower response to anti-PD-1/PD-L1 therapy, lower overall survival rates, and poor tumor prognosis. These novel findings of TEXs serve as promising therapeutic targets for early diagnosis and prevention of cancer progression.
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Affiliation(s)
- Seyed Z Rasihashemi
- Department of Cardiothoracic Surgery, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Reza Majidazar
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Parya Seraji
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mobina Oladghaffari
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Tohid Kazemi
- Department of Immunology, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Parisa Lotfinejad
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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The Importance of Exosomal PD-L1 in Cancer Progression and Its Potential as a Therapeutic Target. Cells 2021; 10:cells10113247. [PMID: 34831468 PMCID: PMC8619537 DOI: 10.3390/cells10113247] [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: 10/31/2021] [Revised: 11/16/2021] [Accepted: 11/18/2021] [Indexed: 12/23/2022] Open
Abstract
Binding of programmed cell death ligand 1 (PD-L1) to its receptor programmed cell death protein 1 (PD-1) can lead to the inactivation of cytotoxic T lymphocytes, which is one of the mechanisms for immune escape of tumors. Immunotherapy based on this mechanism has been applied in clinic with some remaining issues such as drug resistance. Exosomal PD-L1 derived from tumor cells is considered to play a key role in mediating drug resistance. Here, the effects of various tumor-derived exosomes and tumor-derived exosomal PD-L1 on tumor progression are summarized and discussed. Researchers have found that high expression of exosomal PD-L1 can inhibit T cell activation in in vitro experiments, but the function of exosomal PD-L1 in vivo remains controversial. In addition, the circulating exosomal PD-L1 has high potential to act as an indicator to evaluate the clinical effect. Moreover, therapeutic strategy targeting exosomal PD-L1 is discussed, such as inhibiting the biogenesis or secretion of exosomes. Besides, some specific methods based on the strategy of inhibiting exosomes are concluded. Further study of exosomal PD-L1 may provide an effective and safe approach for tumor treatment, and targeting exosomal PD-L1 by inhibiting exosomes may be a potential method for tumor treatment.
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Himes BT, Geiger PA, Ayasoufi K, Bhargav AG, Brown DA, Parney IF. Immunosuppression in Glioblastoma: Current Understanding and Therapeutic Implications. Front Oncol 2021; 11:770561. [PMID: 34778089 PMCID: PMC8581618 DOI: 10.3389/fonc.2021.770561] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Accepted: 09/24/2021] [Indexed: 12/12/2022] Open
Abstract
Glioblastoma (GBM) is the most common primary brain tumor in adults an carries and carries a terrible prognosis. The current regiment of surgical resection, radiation, and chemotherapy has remained largely unchanged in recent years as new therapeutic approaches have struggled to demonstrate benefit. One of the most challenging hurdles to overcome in developing novel treatments is the profound immune suppression found in many GBM patients. This limits the utility of all manner of immunotherapeutic agents, which have revolutionized the treatment of a number of cancers in recent years, but have failed to show similar benefit in GBM therapy. Understanding the mechanisms of tumor-mediated immune suppression in GBM is critical to the development of effective novel therapies, and reversal of this effect may prove key to effective immunotherapy for GBM. In this review, we discuss the current understanding of tumor-mediated immune suppression in GBM in both the local tumor microenvironment and systemically. We also discuss the effects of current GBM therapy on the immune system. We specifically explore some of the downstream effectors of tumor-driven immune suppression, particularly myeloid-derived suppressor cells (MDSCs) and other immunosuppressive monocytes, and the manner by which GBM induces their formation, with particular attention to the role of GBM-derived extracellular vesicles (EVs). Lastly, we briefly review the current state of immunotherapy for GBM and discuss additional hurdles to overcome identification and implementation of effective therapeutic strategies.
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Affiliation(s)
- Benjamin T Himes
- Department of Neurologic Surgery, Mayo Clinic, Rochester, MN, United States
| | - Philipp A Geiger
- Department of Neurosurgery, University Hospital Innsbruck, Tirol, Austria
| | | | - Adip G Bhargav
- Department of Neurosurgery, University of Kansas, Kansas City, KS, United States
| | - Desmond A Brown
- Surgical Neurology Branch, National Institutes of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States
| | - Ian F Parney
- Department of Neurologic Surgery, Mayo Clinic, Rochester, MN, United States.,Department of Immunology, Mayo Clinic, Rochester, MN, United States
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Peng M, Ren J, Jing Y, Jiang X, Xiao Q, Huang J, Tao Y, Lei L, Wang X, Yang Z, Yang Z, Zhan Q, Lin C, Jin G, Zhang X, Zhang L. Tumour-derived small extracellular vesicles suppress CD8+ T cell immune function by inhibiting SLC6A8-mediated creatine import in NPM1-mutated acute myeloid leukaemia. J Extracell Vesicles 2021; 10:e12168. [PMID: 34807526 PMCID: PMC8607980 DOI: 10.1002/jev2.12168] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 10/11/2021] [Accepted: 11/08/2021] [Indexed: 12/13/2022] Open
Abstract
Acute myeloid leukaemia (AML) carrying nucleophosmin (NPM1) mutations has been defined as a distinct entity of acute leukaemia. Despite remarkable improvements in diagnosis and treatment, the long-term outcomes for this entity remain unsatisfactory. Emerging evidence suggests that leukaemia, similar to other malignant diseases, employs various mechanisms to evade killing by immune cells. However, the mechanism of immune escape in NPM1-mutated AML remains unknown. In this study, both serum and leukemic cells from patients with NPM1-mutated AML impaired the immune function of CD8+ T cells in a co-culture system. Mechanistically, leukemic cells secreted miR-19a-3p into the tumour microenvironment (TME) via small extracellular vesicles (sEVs), which was controlled by the NPM1-mutated protein/CCCTC-binding factor (CTCF)/poly (A)-binding protein cytoplasmic 1 (PABPC1) signalling axis. sEV-related miR-19a-3p was internalized by CD8+ T cells and directly repressed the expression of solute-carrier family 6 member 8 (SLC6A8; a creatine-specific transporter) to inhibit creatine import. Decreased creatine levels can reduce ATP production and impair CD8+ T cell immune function, leading to immune escape by leukemic cells. In summary, leukemic cell-derived sEV-related miR-19a-3p confers immunosuppression to CD8+ T cells by targeting SLC6A8-mediated creatine import, indicating that sEV-related miR-19a-3p might be a promising therapeutic target for NPM1-mutated AML.
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Affiliation(s)
- Meixi Peng
- Key Laboratory of Laboratory Medical Diagnostics Designated by the Ministry of EducationSchool of Laboratory MedicineChongqing Medical UniversityChongqingChina
| | - Jun Ren
- Key Laboratory of Laboratory Medical Diagnostics Designated by the Ministry of EducationSchool of Laboratory MedicineChongqing Medical UniversityChongqingChina
| | - Yipei Jing
- Key Laboratory of Laboratory Medical Diagnostics Designated by the Ministry of EducationSchool of Laboratory MedicineChongqing Medical UniversityChongqingChina
| | - Xueke Jiang
- Key Laboratory of Laboratory Medical Diagnostics Designated by the Ministry of EducationSchool of Laboratory MedicineChongqing Medical UniversityChongqingChina
| | - Qiaoling Xiao
- Key Laboratory of Laboratory Medical Diagnostics Designated by the Ministry of EducationSchool of Laboratory MedicineChongqing Medical UniversityChongqingChina
| | - Junpeng Huang
- Key Laboratory of Laboratory Medical Diagnostics Designated by the Ministry of EducationSchool of Laboratory MedicineChongqing Medical UniversityChongqingChina
| | - Yonghong Tao
- Key Laboratory of Laboratory Medical Diagnostics Designated by the Ministry of EducationSchool of Laboratory MedicineChongqing Medical UniversityChongqingChina
| | - Li Lei
- Key Laboratory of Laboratory Medical Diagnostics Designated by the Ministry of EducationSchool of Laboratory MedicineChongqing Medical UniversityChongqingChina
| | - Xin Wang
- Department of HematologyThe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Zailin Yang
- Department of Clinical Laboratory The Third Affiliated Hospital of Chongqing Medical UniversityChongqingChina
- Chongqing University Cancer HospitalChongqingChina
| | - Zesong Yang
- Department of HematologyThe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Qian Zhan
- The Center for Clinical Molecular Medical detectionThe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Can Lin
- Key Laboratory of Laboratory Medical Diagnostics Designated by the Ministry of EducationSchool of Laboratory MedicineChongqing Medical UniversityChongqingChina
| | - Guoxiang Jin
- Guangdong Provincial People's HospitalGuangdong Academy of Medical SciencesGuangzhouChina
| | - Xian Zhang
- Immunology ProgramMemorial Sloan Kettering Cancer CenterNew YorkNew YorkUSA
| | - Ling Zhang
- Key Laboratory of Laboratory Medical Diagnostics Designated by the Ministry of EducationSchool of Laboratory MedicineChongqing Medical UniversityChongqingChina
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Singh O, Pratt D, Aldape K. Immune cell deconvolution of bulk DNA methylation data reveals an association with methylation class, key somatic alterations, and cell state in glial/glioneuronal tumors. Acta Neuropathol Commun 2021; 9:148. [PMID: 34496929 PMCID: PMC8425010 DOI: 10.1186/s40478-021-01249-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 08/23/2021] [Indexed: 02/08/2023] Open
Abstract
It is recognized that the tumor microenvironment (TME) plays a critical role in the biology of cancer. To better understand the role of immune cell components in CNS tumors, we applied a deconvolution approach to bulk DNA methylation array data in a large set of newly profiled samples (n = 741) as well as samples from external data sources (n = 3311) of methylation-defined glial and glioneuronal tumors. Using the cell-type proportion data as input, we used dimensionality reduction to visualize sample-wise patterns that emerge from the cell type proportion estimations. In IDH-wildtype glioblastomas (n = 2,072), we identified distinct tumor clusters based on immune cell proportion and demonstrated an association with oncogenic alterations such as EGFR amplification and CDKN2A/B homozygous deletion. We also investigated the immune cluster-specific distribution of four malignant cellular states (AC-like, OPC-like, MES-like and NPC-like) in the IDH-wildtype cohort. We identified two major immune-based subgroups of IDH-mutant gliomas, which largely aligned with 1p/19q co-deletion status. Non-codeleted gliomas showed distinct proportions of a key genomic aberration (CDKN2A/B loss) among immune cell-based groups. We also observed significant positive correlations between monocyte proportion and expression of PD-L1 and PD-L2 (R = 0.54 and 0.68, respectively). Overall, the findings highlight specific roles of the TME in biology and classification of CNS tumors, where specific immune cell admixtures correlate with tumor types and genomic alterations.
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The 3.0 Cell Communication: New Insights in the Usefulness of Tunneling Nanotubes for Glioblastoma Treatment. Cancers (Basel) 2021; 13:cancers13164001. [PMID: 34439156 PMCID: PMC8392307 DOI: 10.3390/cancers13164001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 07/05/2021] [Accepted: 08/03/2021] [Indexed: 12/14/2022] Open
Abstract
Simple Summary Communication between cells helps tumors acquire resistance to chemotherapy and makes the struggle against cancer more challenging. Tunneling nanotubes (TNTs) are long channels able to connect both nearby and distant cells, contributing to a more malignant phenotype. This finding might be useful in designing novel strategies of drug delivery exploiting these systems of connection. This would be particularly important to reach tumor niches, where glioblastoma stem cells proliferate and provoke immune escape, thereby increasing metastatic potential and tumor recurrence a few months after surgical resection of the primary mass. Along with the direct inhibition of TNT formation, TNT analysis, and targeting strategies might be useful in providing innovative tools for the treatment of this tumor. Abstract Glioblastoma (GBM) is a particularly challenging brain tumor characterized by a heterogeneous, complex, and multicellular microenvironment, which represents a strategic network for treatment escape. Furthermore, the presence of GBM stem cells (GSCs) seems to contribute to GBM recurrence after surgery, and chemo- and/or radiotherapy. In this context, intercellular communication modalities play key roles in driving GBM therapy resistance. The presence of tunneling nanotubes (TNTs), long membranous open-ended channels connecting distant cells, has been observed in several types of cancer, where they emerge to steer a more malignant phenotype. Here, we discuss the current knowledge about the formation of TNTs between different cellular types in the GBM microenvironment and their potential role in tumor progression and recurrence. Particularly, we highlight two prospective strategies targeting TNTs as possible therapeutics: (i) the inhibition of TNT formation and (ii) a boost in drug delivery between cells through these channels. The latter may require future studies to design drug delivery systems that are exchangeable through TNTs, thus allowing for access to distant tumor niches that are involved in tumor immune escape, maintenance of GSC plasticity, and increases in metastatic potential.
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