1
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Arfan S, Thway K, Jones RL, Huang PH. Molecular Heterogeneity in Leiomyosarcoma and Implications for Personalised Medicine. Curr Treat Options Oncol 2024; 25:644-658. [PMID: 38656686 DOI: 10.1007/s11864-024-01204-5] [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] [Accepted: 04/04/2024] [Indexed: 04/26/2024]
Abstract
OPINION STATEMENT Leiomyosarcoma (LMS) is one of the more common subtypes of soft tissue sarcomas (STS), accounting for about 20% of cases. Differences in anatomical location, risk of recurrence and histomorphological variants contribute to the substantial clinical heterogeneity in survival outcomes and therapy responses observed in patients. There is therefore a need to move away from the current one-size-fits-all treatment approach towards a personalised strategy tailored for individual patients. Over the past decade, tissue profiling studies have revealed key genomic features and an additional layer of molecular heterogeneity among patients, with potential utility for optimal risk stratification and biomarker-matched therapies. Furthermore, recent studies investigating intratumour heterogeneity and tumour evolution patterns in LMS suggest some key features that may need to be taken into consideration when designing treatment strategies and clinical trials. Moving forward, national and international collaborative efforts to aggregate expertise, data, resources and tools are needed to achieve a step change in improving patient survival outcomes in this disease of unmet need.
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Affiliation(s)
- Sara Arfan
- Division of Molecular Pathology, The Institute of Cancer Research, 15 Cotswold Road, Sutton, SM2 5NG, UK
| | - Khin Thway
- Division of Molecular Pathology, The Institute of Cancer Research, 15 Cotswold Road, Sutton, SM2 5NG, UK
- The Royal Marsden NHS Foundation Trust, Fulham Road, London, SW3 6JJ, UK
| | - Robin L Jones
- The Royal Marsden NHS Foundation Trust, Fulham Road, London, SW3 6JJ, UK
- Division of Clinical Studies, The Institute of Cancer Research, 15 Cotswold Road, Sutton, SM2 5NG, UK
| | - Paul H Huang
- Division of Molecular Pathology, The Institute of Cancer Research, 15 Cotswold Road, Sutton, SM2 5NG, UK.
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2
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Li S, Wang G, Ren Y, Liu X, Wang Y, Li J, Liu H, Yang J, Xing J, Zhang Y, He C, Xu S, Hou X, Li N. Expression and function of VISTA on myeloid cells. Biochem Pharmacol 2024; 222:116100. [PMID: 38428824 DOI: 10.1016/j.bcp.2024.116100] [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: 10/23/2023] [Revised: 02/04/2024] [Accepted: 02/27/2024] [Indexed: 03/03/2024]
Abstract
V-domain containing Ig Suppressor of T cell Activation (VISTA) is predominantly expressed on myeloid cells and functions as a ligand/receptor/soluble molecule. In inflammatory responses and immune responses, VISTA regulates multiple functions of myeloid cells, such as chemotaxis, phagocytosis, T cell activation. Since inflammation and immune responses are critical in many diseases, VISTA is a promising therapeutic target. In this review, we will describe the expression and function of VISTA on different myeloid cells, including neutrophils, monocytes, macrophages, dendritic cells (DCs), myeloid-derived suppressor cells (MDSCs). In addition, we will discuss whether the functions of VISTA on these cells impact the disease processing.
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Affiliation(s)
- Siyu Li
- Health Science Center, Ningbo University, Ningbo, China.
| | - Geng Wang
- Health Science Center, Ningbo University, Ningbo, China.
| | - Yan Ren
- Health Science Center, Ningbo University, Ningbo, China.
| | - Xinyue Liu
- Health Science Center, Ningbo University, Ningbo, China.
| | - Yixuan Wang
- Health Science Center, Ningbo University, Ningbo, China.
| | - Jianing Li
- Health Science Center, Ningbo University, Ningbo, China.
| | - Hua Liu
- Health Science Center, Ningbo University, Ningbo, China.
| | - Jiaqiang Yang
- Health Science Center, Ningbo University, Ningbo, China.
| | - Jingjun Xing
- Health Science Center, Ningbo University, Ningbo, China.
| | - Yanru Zhang
- Health Science Center, Ningbo University, Ningbo, China.
| | - Canxia He
- Health Science Center, Ningbo University, Ningbo, China.
| | - Suling Xu
- Department of Dermatology, the First Affiliated Hospital of Ningbo University, Ningbo, China.
| | - Xin Hou
- Health Science Center, Ningbo University, Ningbo, China.
| | - Na Li
- Health Science Center, Ningbo University, Ningbo, China; Department of Dermatology, the First Affiliated Hospital of Ningbo University, Ningbo, China.
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3
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Bolognesi MM, Antoranz A, Bosisio FM, Cattoretti G. Quantitative multiplex immunohistochemistry with colorimetric staining (QUIVER) may still benefit from MILAN. Acta Neuropathol Commun 2023; 11:91. [PMID: 37287032 DOI: 10.1186/s40478-023-01585-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 05/18/2023] [Indexed: 06/09/2023] Open
Affiliation(s)
- Maddalena M Bolognesi
- Pathology, Department of Medicine and Surgery, Università di Milano-Bicocca, Via Cadore 48, Monza, MI, Italy
| | - Asier Antoranz
- Translational Cell and Tissue Research Unit, Department of Imaging and Pathology, KU Leuven, Leuven, Belgium
- The Laboratory for Precision Cancer Medicine, Translational Cell and Tissue Research Unit, Department of Imaging and Pathology, KU Leuven, Leuven, Belgium
| | - Francesca Maria Bosisio
- Translational Cell and Tissue Research Unit, Department of Imaging and Pathology, KU Leuven, Leuven, Belgium
| | - Giorgio Cattoretti
- Pathology, Department of Medicine and Surgery, Università di Milano-Bicocca, Via Cadore 48, Monza, MI, Italy.
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4
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Dall’Olio L, Bolognesi M, Borghesi S, Cattoretti G, Castellani G. BRAQUE: Bayesian Reduction for Amplified Quantization in UMAP Embedding. ENTROPY (BASEL, SWITZERLAND) 2023; 25:e25020354. [PMID: 36832720 PMCID: PMC9955093 DOI: 10.3390/e25020354] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 02/01/2023] [Accepted: 02/10/2023] [Indexed: 06/09/2023]
Abstract
Single-cell biology has revolutionized the way we understand biological processes. In this paper, we provide a more tailored approach to clustering and analyzing spatial single-cell data coming from immunofluorescence imaging techniques. We propose Bayesian Reduction for Amplified Quantization in UMAP Embedding (BRAQUE) as an integrative novel approach, from data preprocessing to phenotype classification. BRAQUE starts with an innovative preprocessing, named Lognormal Shrinkage, which is able to enhance input fragmentation by fitting a lognormal mixture model and shrink each component towards its median, in order to help further the clustering step in finding more separated and clear clusters. Then, BRAQUE's pipeline consists of a dimensionality reduction step performed using UMAP, and a clustering performed using HDBSCAN on UMAP embedding. In the end, clusters are assigned to a cell type by experts, using effects size measures to rank markers and identify characterizing markers (Tier 1), and possibly characterize markers (Tier 2). The number of total cell types in one lymph node detectable with these technologies is unknown and difficult to predict or estimate. Therefore, with BRAQUE, we achieved a higher granularity than other similar algorithms such as PhenoGraph, following the idea that merging similar clusters is easier than splitting unclear ones into clear subclusters.
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Affiliation(s)
- Lorenzo Dall’Olio
- Department of Physics and Astronomy, University of Bologna, 40127 Bologna, Italy
| | - Maddalena Bolognesi
- Department of Medicine and Surgery, University of Milano Bicocca, 20900 Monza, Italy
| | - Simone Borghesi
- Department of Mathematics and Applications, University of Milano Bicocca, 20126 Milan, Italy
| | - Giorgio Cattoretti
- Department of Medicine and Surgery, University of Milano Bicocca, 20900 Monza, Italy
| | - Gastone Castellani
- Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, 40127 Bologna, Italy
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5
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Guillot A, Kohlhepp MS, Tacke F. Multiplex Immunostaining to Spatially Resolve the Cellular Landscape in Human and Mouse Livers. Methods Mol Biol 2023; 2669:245-255. [PMID: 37247065 DOI: 10.1007/978-1-0716-3207-9_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Histological techniques based on tissue colorations (e.g., hematoxylin-eosin, Sirius red) and immunostaining remain gold standard methodologies for diagnostic or phenotyping purposes in liver disease research and clinical hepatology. With the development of -omics technologies, greater information can be extracted from tissue sections. We describe a sequential immunostaining protocol consisting of repetitive cycles of immunostaining and chemically induced antibody stripping that can be readily applied to various formalin-fixed tissues (liver or other organs, mouse or human) and does not require specific equipment or commercial kits. Importantly, the combination of antibodies can be adapted according to specific clinical or scientific needs.
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Affiliation(s)
- Adrien Guillot
- Charité Universitätsmedizin Berlin, Department of Hepatology & Gastroenterology, Berlin, Germany
| | - Marlene Sophia Kohlhepp
- Charité Universitätsmedizin Berlin, Department of Hepatology & Gastroenterology, Berlin, Germany
| | - Frank Tacke
- Charité Universitätsmedizin Berlin, Department of Hepatology & Gastroenterology, Berlin, Germany.
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6
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Ciccimarra R, Bolognesi MM, Zoboli M, Cattoretti G, Stellari FF, Ravanetti F. The normal and fibrotic mouse lung classified by spatial proteomic analysis. Sci Rep 2022; 12:8742. [PMID: 35610327 PMCID: PMC9130283 DOI: 10.1038/s41598-022-12738-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 05/03/2022] [Indexed: 12/25/2022] Open
Abstract
Single cell classification is elucidating homeostasis and pathology in tissues and whole organs. We applied in situ spatial proteomics by multiplex antibody staining to routinely processed mouse lung, healthy and during a fibrosis model. With a limited validated antibody panel (24) we classify the normal constituents (alveolar type I and II, bronchial epithelia, endothelial, muscular, stromal and hematopoietic cells) and by quantitative measurements, we show the progress of lung fibrosis over a 4 weeks course, the changing landscape and the cell-specific quantitative variation of a multidrug transporter. An early decline in AT2 alveolar cells and a progressive increase in stromal cells seems at the core of the fibrotic process.
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Affiliation(s)
| | | | - Matteo Zoboli
- Department of Veterinary Science, Università di Parma, Parma, Italy
| | - Giorgio Cattoretti
- Department of Medicine and Surgery, Università di Milano-Bicocca, Monza, Italy
| | - Franco F Stellari
- Corporate Preclinical R&D, Chiesi Farmaceutici S.P.A., Largo Belloli 11/A, 43122, Parma, Italy.
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7
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Assi T, Mir O. Hyperprogressive disease in leiomyosarcoma: a threat to the use of single-agent anti-PD-(L)1 therapy? Immunotherapy 2022; 14:271-274. [DOI: 10.2217/imt-2021-0297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
- Tarek Assi
- Department of Cancer Medicine, Gustave Roussy, Villejuif, France
| | - Olivier Mir
- Department of Ambulatory Cancer Care, Gustave Roussy, Villejuif, France
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8
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Mascadri F, Bolognesi MM, Pilla D, Cattoretti G. Rejuvenated Vintage Tissue Sections Highlight Individual Antigen Fate During Processing and Long-term Storage. J Histochem Cytochem 2021; 69:659-667. [PMID: 34541944 PMCID: PMC8504260 DOI: 10.1369/00221554211047287] [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] [Indexed: 01/22/2023] Open
Abstract
Antigen-bearing proteins become progressively unavailable to immunodetection after prolonged storage of routine sections, exposed to a variety of agents, such as moisture, oxygen, and temperature. By proteomic analysis, the antigens are retained in the sections and definitely in the tissue block, pointing to fixation-independent, storage time–dependent protein modifications. Based on previous experience, we hypothesized that a combined exposure to a reducing agent and to chemicals favoring protein conformation changes would reverse the masking in aged sections. Disaccharides, lactose and sucrose, and a surfactant, added to a standard antigen retrieval buffer, reverse the negative changes in aged sections. Furthermore, they provide enhanced access to antigens in freshly cut sections, but not universally, revealing additional factors, besides heat and calcium chelation, required for antigen retrieval of individual proteins:
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Affiliation(s)
- Francesco Mascadri
- Pathology, Department of Medicine and Surgery, Università di Milano-Bicocca, Monza, Italy
| | - Maddalena M Bolognesi
- Pathology, Department of Medicine and Surgery, Università di Milano-Bicocca, Monza, Italy
| | - Daniela Pilla
- Department of Pathology, ASST Monza, Ospedale San Gerardo, Monza, Italy
| | - Giorgio Cattoretti
- Pathology, Department of Medicine and Surgery, Università di Milano-Bicocca, Monza, Italy.,Department of Pathology, ASST Monza, Ospedale San Gerardo, Monza, Italy
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9
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van Oost S, Meijer DM, Kuijjer ML, Bovée JVMG, de Miranda NFCC. Linking Immunity with Genomics in Sarcomas: Is Genomic Complexity an Immunogenic Trigger? Biomedicines 2021; 9:1048. [PMID: 34440251 PMCID: PMC8391750 DOI: 10.3390/biomedicines9081048] [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: 07/21/2021] [Revised: 08/14/2021] [Accepted: 08/16/2021] [Indexed: 11/16/2022] Open
Abstract
Sarcomas comprise a collection of highly heterogeneous malignancies that can be grossly grouped in the categories of sarcomas with simple or complex genomes. Since the outcome for most sarcoma patients has barely improved in the last decades, there is an urgent need for improved therapies. Immunotherapy, and especially T cell checkpoint blockade, has recently been a game-changer in cancer therapy as it produced significant and durable treatment responses in several cancer types. Currently, only a small fraction of sarcoma patients benefit from immunotherapy, supposedly due to a general lack of somatically mutated antigens (neoantigens) and spontaneous T cell immunity in most cancers. However, genomic events resulting from chromosomal instability are frequent in sarcomas with complex genomes and could drive immunity in those tumors. Improving our understanding of the mechanisms that shape the immune landscape of sarcomas will be crucial to overcoming the current challenges of sarcoma immunotherapy. This review focuses on what is currently known about the tumor microenvironment in sarcomas and how this relates to their genomic features. Moreover, we discuss novel therapeutic strategies that leverage the tumor microenvironment to increase the clinical efficacy of immunotherapy, and which could provide new avenues for the treatment of sarcomas.
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Affiliation(s)
- Siddh van Oost
- Department of Pathology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (S.v.O.); (D.M.M.); (M.L.K.); (N.F.C.C.d.M.)
| | - Debora M. Meijer
- Department of Pathology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (S.v.O.); (D.M.M.); (M.L.K.); (N.F.C.C.d.M.)
| | - Marieke L. Kuijjer
- Department of Pathology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (S.v.O.); (D.M.M.); (M.L.K.); (N.F.C.C.d.M.)
- Centre for Molecular Medicine Norway (NCMM), Faculty of Medicine, University of Oslo, 0318 Oslo, Norway
| | - Judith V. M. G. Bovée
- Department of Pathology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (S.v.O.); (D.M.M.); (M.L.K.); (N.F.C.C.d.M.)
| | - Noel F. C. C. de Miranda
- Department of Pathology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (S.v.O.); (D.M.M.); (M.L.K.); (N.F.C.C.d.M.)
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10
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Ozaniak A, Vachtenheim J, Lischke R, Bartunkova J, Strizova Z. Novel Insights into the Immunotherapy of Soft Tissue Sarcomas: Do We Need a Change of Perspective? Biomedicines 2021; 9:biomedicines9080935. [PMID: 34440139 PMCID: PMC8393686 DOI: 10.3390/biomedicines9080935] [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: 06/30/2021] [Revised: 07/19/2021] [Accepted: 07/27/2021] [Indexed: 12/19/2022] Open
Abstract
Soft tissue sarcomas (STSs) are rare mesenchymal tumors. With more than 80 histological subtypes of STSs, data regarding novel biomarkers of strong prognostic and therapeutic value are very limited. To date, the most important prognostic factor is the tumor grade, and approximately 50% of patients that are diagnosed with high-grade STSs die of metastatic disease within five years. Systemic chemotherapy represents the mainstay of metastatic STSs treatment for decades but induces response in only 15–35% of the patients, irrespective of the histological subtype. In the era of immunotherapy, deciphering the immune cell signatures within the STSs tumors may discriminate immunotherapy responders from non-responders and different immunotherapeutic approaches could be combined based on the predominant cell subpopulations infiltrating the STS tumors. Furthermore, understanding the immune diversity of the STS tumor microenvironment (TME) in different histological subtypes may provide a rationale for stratifying patients according to the TME immune parameters. In this review, we introduce the most important immune cell types infiltrating the STSs tumors and discuss different immunotherapies, as well as promising clinical trials, that would target these immune cells to enhance the antitumor immune responses and improve the prognosis of metastatic STSs patients.
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Affiliation(s)
- Andrej Ozaniak
- Third Department of Surgery, First Faculty of Medicine, Charles University and University Hospital Motol, 150 06 Prague, Czech Republic; (A.O.); (J.V.J.); (R.L.)
| | - Jiri Vachtenheim
- Third Department of Surgery, First Faculty of Medicine, Charles University and University Hospital Motol, 150 06 Prague, Czech Republic; (A.O.); (J.V.J.); (R.L.)
| | - Robert Lischke
- Third Department of Surgery, First Faculty of Medicine, Charles University and University Hospital Motol, 150 06 Prague, Czech Republic; (A.O.); (J.V.J.); (R.L.)
| | - Jirina Bartunkova
- Department of Immunology, Second Faculty of Medicine, Charles University and University Hospital Motol, 150 06 Prague, Czech Republic;
| | - Zuzana Strizova
- Department of Immunology, Second Faculty of Medicine, Charles University and University Hospital Motol, 150 06 Prague, Czech Republic;
- Correspondence: ; Tel.: +420-604712471
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11
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De Wispelaere W, Annibali D, Tuyaerts S, Lambrechts D, Amant F. Resistance to Immune Checkpoint Blockade in Uterine Leiomyosarcoma: What Can We Learn from Other Cancer Types? Cancers (Basel) 2021; 13:cancers13092040. [PMID: 33922556 PMCID: PMC8122870 DOI: 10.3390/cancers13092040] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 04/19/2021] [Accepted: 04/20/2021] [Indexed: 12/23/2022] Open
Abstract
The onset of immune checkpoint blockade (ICB) therapy over the last decade has transformed the therapeutic landscape in oncology. ICB has shown unprecedented clinical activity and durable responses in a variety of difficult-to-treat cancers. However, despite these promising long-term responses, a majority of patients fail to respond to single-agent therapy, demonstrating primary or acquired resistance. Uterine leiomyosarcoma (uLMS) is a rare high-risk gynecological cancer with very limited treatment options. Despite research indicating a strong potential for ICB in uLMS, a clinical trial assessing the response to immunotherapy with single-agent nivolumab in advanced-stage uLMS showed no clinical benefit. Many mechanisms of resistance to ICB have been characterized in a variety of tumor types, and many more continue to be uncovered. However, the mechanisms of resistance to ICB in uLMS remain largely unexplored. By elucidating and targeting mechanisms of resistance, treatments can be tailored to improve clinical outcomes. Therefore, in this review we will explore what is known about the immunosuppressive microenvironment of uLMS, link these data to possible resistance mechanisms extrapolated from other cancer types, and discuss potential therapeutic strategies to overcome resistance.
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Affiliation(s)
- Wout De Wispelaere
- Department of Oncology, KU Leuven (University of Leuven) and Leuven Cancer Institute (LKI), 3000 Leuven, Belgium; (W.D.W.); (D.A.); (S.T.)
| | - Daniela Annibali
- Department of Oncology, KU Leuven (University of Leuven) and Leuven Cancer Institute (LKI), 3000 Leuven, Belgium; (W.D.W.); (D.A.); (S.T.)
- Division of Oncogenomics, Antoni Van Leeuwenhoek—Netherlands Cancer Institute (AvL-NKI), 1066 CX Amsterdam, The Netherlands
| | - Sandra Tuyaerts
- Department of Oncology, KU Leuven (University of Leuven) and Leuven Cancer Institute (LKI), 3000 Leuven, Belgium; (W.D.W.); (D.A.); (S.T.)
- Laboratory of Medical and Molecular Oncology (LMMO), Department of Medical Oncology, Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), 1090 Brussels, Belgium
| | - Diether Lambrechts
- Laboratory for Translational Genetics, Department of Human Genetics, KU Leuven (University of Leuven), 3000 Leuven, Belgium;
- VIB Center for Cancer Biology, Flemish Institute for Biotechnology (VIB), 3000 Leuven, Belgium
| | - Frédéric Amant
- Department of Oncology, KU Leuven (University of Leuven) and Leuven Cancer Institute (LKI), 3000 Leuven, Belgium; (W.D.W.); (D.A.); (S.T.)
- Centre for Gynecologic Oncology Amsterdam (CGOA), Antoni Van Leeuwenhoek—Netherlands Cancer Institute, University Medical Center (UMC), 1066 CX Amsterdam, The Netherlands
- Department of Obstetrics and Gynecology, University Hospitals Leuven (UZ Leuven), 3000 Leuven, Belgium
- Correspondence:
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12
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Bolognesi MM, Mascadri F, Furia L, Faretta M, Bosisio FM, Cattoretti G. Antibodies validated for routinely processed tissues stain frozen sections unpredictably. Biotechniques 2021; 70:137-148. [PMID: 33541132 DOI: 10.2144/btn-2020-0149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background: Antibody validation for tissue staining is required for reproducibility; criteria to ensure validity have been published recently. The majority of these recommendations imply the use of routinely processed (formalin-fixed, paraffin-embedded) tissue. Materials & methods: We applied to lightly fixed frozen sections a panel of 126 antibodies validated for formalin-fixed, paraffin-embedded tissue with extended criteria. Results: Less than 30% of the antibodies performed as expected with all fixations. 35% preferred one fixation over another, 13% gave nonspecific staining and 23% did not stain at all. Conclusion: Individual antibody variability of the paratope's fitness for the fixed antigen may be the cause. Revalidation of established antibody panels is required when they are applied to sections whose fixation and processing are different from the tissue where they were initially validated.
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Affiliation(s)
- Maddalena M Bolognesi
- Pathology, Department of Medicine & Surgery, Università di Milano-Bicocca, Via Cadore 48, Monza 20900, Italy
| | - Francesco Mascadri
- Pathology, Department of Medicine & Surgery, Università di Milano-Bicocca, Via Cadore 48, Monza 20900, Italy
| | - Laura Furia
- Department of Experimental Oncology, European Institute of Oncology, Via Adamello 16, Milan 20139, Italy
| | - Mario Faretta
- Department of Experimental Oncology, European Institute of Oncology, Via Adamello 16, Milan 20139, Italy
| | - Francesca M Bosisio
- Laboratory of Translational Cell & Tissue Research, KU Leuven, Herestraat 49, Leuven 3000, Belgium
| | - Giorgio Cattoretti
- Pathology, Department of Medicine & Surgery, Università di Milano-Bicocca, Via Cadore 48, Monza 20900, Italy.,Department of Pathology, Ospedale San Gerardo, ASST-Monza, Via Pergolesi 33, Monza 20900, Italy
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13
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Bolognesi MM, Bosisio FM, Cattoretti G. Unidentified Variables May Account for Variability in Multiplexing Results. J Histochem Cytochem 2020; 68:351-353. [PMID: 32391736 DOI: 10.1369/0022155420911050] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
| | | | - Giorgio Cattoretti
- Pathology, Department of Medicine and Surgery, Università di Milano-Bicocca, Monza, Italy
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14
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Bosisio FM, Antoranz A, van Herck Y, Bolognesi MM, Marcelis L, Chinello C, Wouters J, Magni F, Alexopoulos L, Stas M, Boecxstaens V, Bechter O, Cattoretti G, van den Oord J. Functional heterogeneity of lymphocytic patterns in primary melanoma dissected through single-cell multiplexing. eLife 2020; 9:53008. [PMID: 32057296 PMCID: PMC7053517 DOI: 10.7554/elife.53008] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 02/14/2020] [Indexed: 01/08/2023] Open
Abstract
In melanoma, the lymphocytic infiltrate is a prognostic parameter classified morphologically into 'brisk', 'non-brisk' and 'absent' entailing a functional association that has never been proved. Recently, it has been shown that lymphocytic populations can be very heterogeneous, and that anti-PD-1 immunotherapy supports activated T cells. Here, we characterize the immune landscape in primary melanoma by high-dimensional single-cell multiplex analysis in tissue sections (MILAN technique) followed by image analysis, RT-PCR and shotgun proteomics. We observed that the brisk and non-brisk patterns are heterogeneous functional categories that can be further sub-classified into active, transitional or exhausted. The classification of primary melanomas based on the functional paradigm also shows correlation with spontaneous regression, and an improved prognostic value when compared to that of the brisk classification. Finally, the main inflammatory cell subpopulations that are present in the microenvironment associated with activation and exhaustion and their spatial relationships are described using neighbourhood analysis.
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Affiliation(s)
- Francesca Maria Bosisio
- Laboratory of Translational Cell and Tissue Research, KU Leuven, Leuven, Belgium.,Pathology, Department of Medicine & Surgery, Università degli studi di Milano-Bicocca, Milan, Italy
| | - Asier Antoranz
- ProtATonce Ltd, Athens, Greece.,National Technical University of Athens, Athens, Greece
| | | | | | - Lukas Marcelis
- Laboratory of Translational Cell and Tissue Research, KU Leuven, Leuven, Belgium
| | - Clizia Chinello
- Pathology, Department of Medicine & Surgery, Università degli studi di Milano-Bicocca, Milan, Italy
| | - Jasper Wouters
- Laboratory of Translational Cell and Tissue Research, KU Leuven, Leuven, Belgium
| | - Fulvio Magni
- Pathology, Department of Medicine & Surgery, Università degli studi di Milano-Bicocca, Milan, Italy
| | - Leonidas Alexopoulos
- ProtATonce Ltd, Athens, Greece.,National Technical University of Athens, Athens, Greece
| | | | | | - Oliver Bechter
- Laboratory of Experimental Oncology, KU Leuven, Leuven, Belgium
| | - Giorgio Cattoretti
- Pathology, Department of Medicine & Surgery, Università degli studi di Milano-Bicocca, Milan, Italy
| | - Joost van den Oord
- Laboratory of Translational Cell and Tissue Research, KU Leuven, Leuven, Belgium
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