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Kohl LM, Sumpter TL. Melanomas and mast cells: an ambiguous relationship. Melanoma Res 2024; 34:1-8. [PMID: 37924526 DOI: 10.1097/cmr.0000000000000932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2023]
Abstract
Mast cells (MCs) accumulate in a broad range of tumors, including melanomas. While MCs are potent initiators of immunity in infection, and in allergic inflammation, the function of MCs in anti-melanoma immunity is unclear. MCs have the potential to release tumoricidal cytokines and proteases, to activate antigen-presenting cells and to promote anti-tumor adaptive immunity. However, within the immunosuppressive tumor microenvironment (TME), MC activation may promote angiogenesis and contribute to tumor growth. In this review, the relationship between MCs and melanomas is discussed with a focus on the impact of the TME on MC activation.
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Affiliation(s)
- Lisa M Kohl
- Department of Dermatology, University of Heidelberg, Heidelberg, Germany
- Departments of Dermatology
| | - Tina L Sumpter
- Departments of Dermatology
- Immunology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
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2
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Alda S, Ceausu RA, Gaje PN, Raica M, Cosoroaba RM. Mast Cell: A Mysterious Character in Skin Cancer. In Vivo 2024; 38:58-68. [PMID: 38148067 PMCID: PMC10756458 DOI: 10.21873/invivo.13410] [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: 07/24/2023] [Revised: 09/17/2023] [Accepted: 09/25/2023] [Indexed: 12/28/2023]
Abstract
Cutaneous malignancies represent a real concern and burden for the healthcare system, not only due to their increased frequency, but also due to the significant number of deaths attributed to these types of cancer. The genesis of tumors, their progression and metastasis are highly complex and researched subjects; apparently, mast cells (MCs) constitute an important piece in the complicated jigsaw puzzle of cancer. This article reviews the current knowledge of the roles MCs might play in the development of cutaneous malignancies. Besides their well-known and studied role in allergic reactions, MCs are linked to multiple and various disorders, including cancer. MCs exhibit incredible heterogeneity, being able to secrete numerous mediators that influence the tumor microenvironment and tumor cells. They are involved in many physiological and pathological processes, such as inflammation and angiogenesis. In this context, it is paramount to explore the advancements made so far in elucidating the roles that MCs have in skin cancer because they might provide valuable therapeutic targets in the future. Controversial and conflicting results were obtained across the studies examined.
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Affiliation(s)
- Silvia Alda
- Department of Microscopic Morphology/Histology, Angiogenesis Research Center Timişoara, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania
| | - Raluca Amalia Ceausu
- Department of Microscopic Morphology/Histology, Angiogenesis Research Center Timişoara, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania;
| | - Pusa Nela Gaje
- Department of Microscopic Morphology/Histology, Angiogenesis Research Center Timişoara, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania
| | - Marius Raica
- Department of Microscopic Morphology/Histology, Angiogenesis Research Center Timişoara, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania
| | - Raluca Mioara Cosoroaba
- Department of Management, Legislation and Communication in Dental Medicine, First Department of Dentistry, Faculty of Dental Medicine, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania
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3
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Guo X, Sun M, Yang P, Meng X, Liu R. Role of mast cells activation in the tumor immune microenvironment and immunotherapy of cancers. Eur J Pharmacol 2023; 960:176103. [PMID: 37852570 DOI: 10.1016/j.ejphar.2023.176103] [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: 06/08/2023] [Revised: 09/25/2023] [Accepted: 10/04/2023] [Indexed: 10/20/2023]
Abstract
The mast cell is an important cellular component that plays a crucial role in the crosstalk between innate and adaptive immune responses within the tumor microenvironment (TME). Recently, numerous studies have indicated that mast cells related to tumors play a dual role in regulating cancers, with conflicting results seemingly determined by the degranulation medium. As such, mast cells are an ignored but very promising potential target for cancer immunotherapy based on their immunomodulatory function. In this review, we present a comprehensive overview of the roles and mechanisms of mast cells in diverse cancer types. Firstly, we evaluated the infiltration density and location of mast cells on tumor progression. Secondly, mast cells are activated by the TME and subsequently release a range of inflammatory mediators, cytokines, chemokines, and lipid products that modulate their pro-or anti-tumor functions. Thirdly, activated mast cells engage in intercellular communication with other immune or stromal cells to modulate the immune status or promote tumor development. Finally, we deliberated on the clinical significance of targeting mast cells as a therapeutic approach to restrict tumor initiation and progression. Overall, our review aims to provide insights for future research on the role of mast cells in tumors and their potential as therapeutic targets for cancer treatment.
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Affiliation(s)
- Xinxin Guo
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China; Xiangnan University, Chenzhou, China
| | - Mingjun Sun
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
| | - Peiyan Yang
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
| | - Xingchen Meng
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
| | - Ran Liu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China.
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4
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Protease Profile of Tumor-Associated Mast Cells in Melanoma. Int J Mol Sci 2022; 23:ijms23168930. [PMID: 36012196 PMCID: PMC9408654 DOI: 10.3390/ijms23168930] [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: 07/26/2022] [Revised: 08/07/2022] [Accepted: 08/08/2022] [Indexed: 12/13/2022] Open
Abstract
Mast cells (MCs) produce a variety of mediators, including proteases—tryptase, chymase, and carboxypeptidases—which are important for the immune response. However, a detailed assessment of the mechanisms of biogenesis and excretion of proteases in melanoma has yet to be carried out. In this study, we present data on phenotype and secretory pathways of proteases in MCs in the course of melanoma. The development of melanoma was found to be accompanied by the appearance in the tumor-associated MC population of several pools with a predominant content of one or two specific proteases with a low content or complete absence of others. Elucidation of the molecular and morphological features of the expression of MC proteases in melanoma allows us a fresh perspective of the pathogenesis of the disease, and can be used to clarify MCs classification, the disease prognosis, and evaluate the effectiveness of ongoing antitumor therapy.
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5
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Atiakshin DA, Kostin AA, Trotsenko ID, Shishkina VV, Tiemann M, Buchwalow IB. Carboxypeptidase A3 in the structure of the protease phenotype of mast cells: cytophysiological aspects. RUDN JOURNAL OF MEDICINE 2022. [DOI: 10.22363/2313-0245-2022-26-1-9-33] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Carboxypeptidase A3 (CPA3) is a specific protease of mast cells (MC) with variable expression and appears to be one of the preformed components of the secretome. CPA3 is involved in regulation of the state of a specifi tissue microenvironment and components of the integrative-buffer metabolic environment in adaptive and pathological processes; it affects implementation of the innate immunity, mechanisms of angiogenesis, processes of the extracellular matrix remodeling, etc. CPA3 identification using protocols of multiplex immunohistochemistry allows specifying details of the organ-specific mast cell population features, including the protease phenotype, mechanisms of biogenesis with cytoand histotopographic criteria, and features of secretory pathways. Numerous biological effects of CPA3, including participation in the regulation of the pulmonary parenchyma and systemic blood flow, in biogenesis and remodeling of the fibrous component of the extracellular matrix, in epigenetic reprogramming, determine the importance of fundamental investigation of the physiological activity of protease and its involvement in the implementation of pathological processes. Further studies will contribute to the detection of the translational value of the mast cell CPA3 expression features as a prognostic factor and a promising molecular target for treatment of socially significant diseases.
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6
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Leveque E, Rouch A, Syrykh C, Mazières J, Brouchet L, Valitutti S, Espinosa E, Lafouresse F. Phenotypic and Histological Distribution Analysis Identify Mast Cell Heterogeneity in Non-Small Cell Lung Cancer. Cancers (Basel) 2022; 14:cancers14061394. [PMID: 35326546 PMCID: PMC8946292 DOI: 10.3390/cancers14061394] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 03/04/2022] [Accepted: 03/07/2022] [Indexed: 02/04/2023] Open
Abstract
Simple Summary During the fight against tumor, some cells of the immune system such as cytotoxic lymphocytes eliminate tumoral cells while others such as tumor-associated macrophages favor tumor development. Mast cells (MCs) are multifaceted immune cells whose role in cancer is still poorly understood. Moreover, MCs are poorly characterized in the context of cancer and their presence in the tumor microenvironment has been reported to be either associated with good or bad prognosis. In this pilot study we characterized tumor-associated MCs (TAMCs) in lung cancer. We showed that TAMCs exhibited a typical phenotype and can be classified in two subsets according to alphaE integrin (CD103) expression. CD103+ TAMCs appeared more mature, more prone to interact with CD4+ T cells, and located closer to cancer cells than their CD103− counterpart. This study revealed that a high frequency of total TAMC correlated with better overall survival and progression free survival in patients and underlined MC heterogeneity in cancer. Abstract Mast cells (MCs) are multifaceted innate immune cells often present in the tumor microenvironment (TME). However, MCs have been only barely characterized in studies focusing on global immune infiltrate phenotyping. Consequently, their role in cancer is still poorly understood. Furthermore, their prognosis value is confusing since MCs have been associated with good and bad (or both) prognosis depending on the cancer type. In this pilot study performed on a surgical cohort of 48 patients with Non-Small Cell Lung Cancer (NSCLC), we characterized MC population within the TME and in matching non-lesional lung areas, by multicolor flow cytometry and confocal microscopy. Our results showed that tumor-associated MCs (TAMCs) harbor a distinct phenotype as compared with MCs present in non-lesional counterpart of the lung. Moreover, we found two TAMCs subsets based on the expression of CD103 (also named alphaE integrin). CD103+ TAMCs appeared more mature, more prone to interact with CD4+ T cells, and located closer to cancer cells than their CD103− counterpart. In spite of these characteristics, we did not observe a prognosis advantage of a high frequency of CD103+ TAMCs, while a high frequency of total TAMC correlated with better overall survival and progression free survival. Together, this study reveals that TAMCs constitute a heterogeneous population and indicates that MC subsets should be considered for patients’ stratification and management in future research.
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Affiliation(s)
- Edouard Leveque
- Centre de Recherche en Cancérologie de Toulouse (CRCT), UMR1037, INSERM, UMR5071, CNRS, Université Toulouse 3, 31037 Toulouse, France; (E.L.); (A.R.); (S.V.); (E.E.)
| | - Axel Rouch
- Centre de Recherche en Cancérologie de Toulouse (CRCT), UMR1037, INSERM, UMR5071, CNRS, Université Toulouse 3, 31037 Toulouse, France; (E.L.); (A.R.); (S.V.); (E.E.)
- Thoracic Surgery Department, Hôpital Larrey, CHU Toulouse, 31000 Toulouse, France;
| | - Charlotte Syrykh
- Department of Pathology, Institut Universitaire du Cancer—Oncopole de Toulouse, 31059 Toulouse, France;
| | - Julien Mazières
- Thoracic Oncology Department, Hôpital Larrey, CHU Toulouse, 31000 Toulouse, France;
| | - Laurent Brouchet
- Thoracic Surgery Department, Hôpital Larrey, CHU Toulouse, 31000 Toulouse, France;
| | - Salvatore Valitutti
- Centre de Recherche en Cancérologie de Toulouse (CRCT), UMR1037, INSERM, UMR5071, CNRS, Université Toulouse 3, 31037 Toulouse, France; (E.L.); (A.R.); (S.V.); (E.E.)
- Department of Pathology, Institut Universitaire du Cancer—Oncopole de Toulouse, 31059 Toulouse, France;
| | - Eric Espinosa
- Centre de Recherche en Cancérologie de Toulouse (CRCT), UMR1037, INSERM, UMR5071, CNRS, Université Toulouse 3, 31037 Toulouse, France; (E.L.); (A.R.); (S.V.); (E.E.)
| | - Fanny Lafouresse
- Centre de Recherche en Cancérologie de Toulouse (CRCT), UMR1037, INSERM, UMR5071, CNRS, Université Toulouse 3, 31037 Toulouse, France; (E.L.); (A.R.); (S.V.); (E.E.)
- Correspondence:
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7
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Atiakshin DA, Kostin AA, Trotsenko ID, Shishkina VV, Tiemann M, Buchwalow IB. Carboxypeptidase A3 in the structure of the protease phenotype of mast cells: cytophysiological aspects. RUDN JOURNAL OF MEDICINE 2022. [DOI: 10.22363/2313-0245-2022-26-1-9-32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Carboxypeptidase A3 (CPA3) is a specific protease of mast cells (MC) with variable expression and appears to be one of the preformed components of the secretome. CPA3 is involved in regulation of the state of a specifi tissue microenvironment and components of the integrative-buffer metabolic environment in adaptive and pathological processes; it affects implementation of the innate immunity, mechanisms of angiogenesis, processes of the extracellular matrix remodeling, etc. CPA3 identification using protocols of multiplex immunohistochemistry allows specifying details of the organ-specific mast cell population features, including the protease phenotype, mechanisms of biogenesis with cyto- and histotopographic criteria, and features of secretory pathways. Numerous biological effects of CPA3, including participation in the regulation of the pulmonary parenchyma and systemic blood flow, in biogenesis and remodeling of the fibrous component of the extracellular matrix, in epigenetic reprogramming, determine the importance of fundamental investigation of the biological activity and regulation of pathological processes of CPA3. Further studies will contribute to the detection of the true value of the mast cell CPA3 expression features as a prognostic factor and a promising molecular target for treatment of socially significant diseases.
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8
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Atiakshin D, Kostin A, Trotsenko I, Samoilova V, Buchwalow I, Tiemann M. Carboxypeptidase A3—A Key Component of the Protease Phenotype of Mast Cells. Cells 2022; 11:cells11030570. [PMID: 35159379 PMCID: PMC8834431 DOI: 10.3390/cells11030570] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/04/2022] [Accepted: 02/05/2022] [Indexed: 11/16/2022] Open
Abstract
Carboxypeptidase A3 (CPA3) is a specific mast cell (MC) protease with variable expression. This protease is one of the preformed components of the secretome. During maturation of granules, CPA3 becomes an active enzyme with a characteristic localization determining the features of the cytological and ultrastructural phenotype of MC. CPA3 takes part in the regulation of a specific tissue microenvironment, affecting the implementation of innate immunity, the mechanisms of angiogenesis, the processes of remodeling of the extracellular matrix, etc. Characterization of CPA3 expression in MC can be used to refine the MC classification, help in a prognosis, and increase the effectiveness of targeted therapy.
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Affiliation(s)
- Dmitri Atiakshin
- Research and Educational Resource Center for Immunophenotyping, Digital Spatial Profiling and Ultrastructural Analysis Innovative Technologies, Peoples’ Friendship University of Russia, Miklukho-Maklaya Str. 6, 117198 Moscow, Russia; (D.A.); (A.K.); (I.T.)
- Research Institute of Experimental Biology and Medicine, Burdenko Voronezh State Medical University, Studencheskaya Str. 10, 394036 Voronezh, Russia
| | - Andrey Kostin
- Research and Educational Resource Center for Immunophenotyping, Digital Spatial Profiling and Ultrastructural Analysis Innovative Technologies, Peoples’ Friendship University of Russia, Miklukho-Maklaya Str. 6, 117198 Moscow, Russia; (D.A.); (A.K.); (I.T.)
| | - Ivan Trotsenko
- Research and Educational Resource Center for Immunophenotyping, Digital Spatial Profiling and Ultrastructural Analysis Innovative Technologies, Peoples’ Friendship University of Russia, Miklukho-Maklaya Str. 6, 117198 Moscow, Russia; (D.A.); (A.K.); (I.T.)
| | - Vera Samoilova
- Institute for Hematopathology, Fangdieckstr. 75a, 22547 Hamburg, Germany; (V.S.); (M.T.)
| | - Igor Buchwalow
- Research and Educational Resource Center for Immunophenotyping, Digital Spatial Profiling and Ultrastructural Analysis Innovative Technologies, Peoples’ Friendship University of Russia, Miklukho-Maklaya Str. 6, 117198 Moscow, Russia; (D.A.); (A.K.); (I.T.)
- Institute for Hematopathology, Fangdieckstr. 75a, 22547 Hamburg, Germany; (V.S.); (M.T.)
- Correspondence: ; Tel.: +49-(040)-7070-85317; Fax: +49-(040)-7070-85110
| | - Markus Tiemann
- Institute for Hematopathology, Fangdieckstr. 75a, 22547 Hamburg, Germany; (V.S.); (M.T.)
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Pejler G, Alanazi S, Grujic M, Adler J, Olsson AK, Sommerhoff CP, Rabelo Melo F. Mast Cell Tryptase Potentiates Neutrophil Extracellular Trap Formation. J Innate Immun 2021; 14:433-446. [PMID: 34937018 PMCID: PMC9485958 DOI: 10.1159/000520972] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 10/26/2021] [Indexed: 11/26/2022] Open
Abstract
Previous research has indicated an intimate functional communication between mast cells (MCs) and neutrophils during inflammatory conditions, but the nature of such communication is not fully understood. Activated neutrophils are known to release DNA-containing extracellular traps (neutrophil extracellular traps [NETs]) and, based on the known ability of tryptase to interact with negatively charged polymers, we here hypothesized that tryptase might interact with NET-contained DNA and thereby regulate NET formation. In support of this, we showed that tryptase markedly enhances NET formation in phorbol myristate acetate-activated human neutrophils. Moreover, tryptase was found to bind vividly to the NETs, to cause proteolysis of core histones and to cause a reduction in the levels of citrullinated histone-3. Secretome analysis revealed that tryptase caused increased release of numerous neutrophil granule compounds, including gelatinase, lactoferrin, and myeloperoxidase. We also show that DNA can induce the tetrameric, active organization of tryptase, suggesting that NET-contained DNA can maintain tryptase activity in the extracellular milieu. In line with such a scenario, DNA-stabilized tryptase was shown to efficiently degrade numerous pro-inflammatory compounds. Finally, we showed that tryptase is associated with NET formation in vivo in a melanoma setting and that NET formation in vivo is attenuated in mice lacking tryptase expression. Altogether, these findings reveal that NET formation can be regulated by MC tryptase, thus introducing a novel mechanism of communication between MCs and neutrophils.
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Affiliation(s)
- Gunnar Pejler
- Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
- *Gunnar Pejler,
| | - Sultan Alanazi
- Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
| | - Mirjana Grujic
- Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
| | - Jeremy Adler
- Department of Immunology, Genetics and Pathology − BioVis, Uppsala University, Uppsala, Sweden
| | - Anna-Karin Olsson
- Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
| | | | - Fabio Rabelo Melo
- Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
- **Fabio Rabelo Melo,
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Elieh Ali Komi D, Jalili A. The emerging role of mast cells in skin cancers: involved cellular and molecular mechanisms. Int J Dermatol 2021; 61:792-803. [PMID: 34570900 DOI: 10.1111/ijd.15895] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 07/26/2021] [Accepted: 08/17/2021] [Indexed: 02/04/2023]
Abstract
Skin cancers are the most common cancers worldwide. They can be divided into nonmelanoma skin cancers (NMSC) including basal cell carcinoma (BCC), squamous cell carcinoma (SCC), and less common lymphomas and merkel cell carcinoma, and melanomas. Melanomas comprise less than 5% of skin cancer rate but are responsible for more than 90% of skin cancer death. Mast cells (MCs) are multifunctional cells that play an important role in inflammatory and allergic reactions. They attract other key players of the immune system by releasing cytokines. Healthy human skin comprises MCs under physiological status, and the number can increase under certain conditions including skin malignancies postulating their possible role in pathogenesis of and immunity against skin cancers. MCs respond to cytokines released by tumor stromal cells, release mediators (including histamine and tryptase), and induce the neovascularization, degradation of extracellular matrix (ECM), and induce mitogenesis. However, MCs may use molecular mechanisms to exert immunosuppressive activity including releasing complement C3, lower expression of CD40L, and overexpression of enzymes with vitamin D3 metabolizing activity including CYP27A1 and CYP27B1. This review summarizes the current knowledge on the role of MCs in pathogenesis and immunity against skin cancers.
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Affiliation(s)
- Daniel Elieh Ali Komi
- Cellular and Molecular Research Center, Cellular and Molecular Medicine Institute, Urmia University of Medical Sciences, Urmia, Iran
| | - Ahmad Jalili
- Department of Dermatology, Bürgenstock Medical Center, Obbürgen, Switzerland
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11
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Mast Cells and Skin and Breast Cancers: A Complicated and Microenvironment-Dependent Role. Cells 2021; 10:cells10050986. [PMID: 33922465 PMCID: PMC8146516 DOI: 10.3390/cells10050986] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/18/2021] [Accepted: 04/20/2021] [Indexed: 12/24/2022] Open
Abstract
Mast cells are important sentinel cells in host defense against infection and major effector cells in allergic disease. The role of these cells in cancer settings has been widely debated. The diverse range of mast cell functions in both immunity and tissue remodeling events, such as angiogenesis, provides multiple opportunities for mast cells to modify the tumor microenvironment. In this review, we consider both skin and breast cancer settings to address the controversy surrounding the importance of mast cells in the host response to tumors. We specifically address the key mediators produced by mast cells which impact tumor development. The role of environmental challenges in modifying mast cell responses and opportunities to modify mast cell responses to enhance anti-tumor immunity are also considered. While the mast cell's role in many cancer contexts is complicated and poorly understood, the activities of these tissue resident and radioresistant cells can provide important opportunities to enhance anti-cancer responses and limit cancer development.
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12
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Mast Cell β-Tryptase Is Enzymatically Stabilized by DNA. Int J Mol Sci 2020; 21:ijms21145065. [PMID: 32709152 PMCID: PMC7404274 DOI: 10.3390/ijms21145065] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 07/09/2020] [Accepted: 07/14/2020] [Indexed: 01/09/2023] Open
Abstract
Tryptase is a tetrameric serine protease located within the secretory granules of mast cells. In the secretory granules, tryptase is stored in complex with negatively charged heparin proteoglycans and it is known that heparin is essential for stabilizing the enzymatic activity of tryptase. However, recent findings suggest that enzymatically active tryptase also can be found in the nucleus of murine mast cells, but it is not known how the enzmatic activity of tryptase is maintained in the nuclear milieu. Here we hypothesized that tryptase, as well as being stabilized by heparin, can be stabilized by DNA, the rationale being that the anionic charge of DNA could potentially substitute for that of heparin to execute this function. Indeed, we showed that double-stranded DNA preserved the enzymatic activity of human β-tryptase with a similar efficiency as heparin. In contrast, single-stranded DNA did not have this capacity. We also demonstrated that DNA fragments down to 400 base pairs have tryptase-stabilizing effects equal to that of intact DNA. Further, we showed that DNA-stabilized tryptase was more efficient in degrading nuclear core histones than heparin-stabilized enzyme. Finally, we demonstrated that tryptase, similar to its nuclear localization in murine mast cells, is found within the nucleus of primary human skin mast cells. Altogether, these finding reveal a hitherto unknown mechanism for the stabilization of mast cell tryptase, and these findings can have an important impact on our understanding of how tryptase regulates nuclear events.
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13
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Grujic M, Hellman L, Gustafson AM, Akula S, Melo FR, Pejler G. Protective role of mouse mast cell tryptase Mcpt6 in melanoma. Pigment Cell Melanoma Res 2020; 33:579-590. [PMID: 31894627 PMCID: PMC7317424 DOI: 10.1111/pcmr.12859] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 12/17/2019] [Accepted: 12/27/2019] [Indexed: 12/11/2022]
Abstract
Tryptase-positive mast cells populate melanomas, but it is not known whether tryptase impacts on melanoma progression. Here we addressed this and show that melanoma growth is significantly higher in tryptase-deficient (Mcpt6-/- ) versus wild-type mice. Histochemical analysis showed that mast cells were frequent in the tumor stroma of both wild-type and Mcpt6-/- mice, and also revealed their presence within the tumor parenchyma. Confocal microscopy analysis revealed that tryptase was taken up by the tumor cells. Further, tryptase-positive granules were released from mast cells and were widely distributed within the tumor tissue, suggesting that tryptase could impact on the tumor microenvironment. Indeed, gene expression analysis showed that the absence of Mcpt6 caused decreased expression of numerous genes, including Cxcl9, Tgtp2, and Gbp10, while the expression of 5p-miR3098 was enhanced. The levels of CXCL9 were lower in serum from Mcpt6-/- versus wild-type mice. In further support of a functional impact of tryptase on melanoma, recombinant tryptase (Mcpt6) was taken up by cultured melanoma cells and caused reduced proliferation. Altogether, our results indicate a protective role of mast cell tryptase in melanoma growth.
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Affiliation(s)
- Mirjana Grujic
- Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
| | - Lars Hellman
- Department of Cell and Molecular Biology, Uppsala University, Uppsala, Sweden
| | - Ann-Marie Gustafson
- Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
| | - Srinivas Akula
- Department of Cell and Molecular Biology, Uppsala University, Uppsala, Sweden
| | - Fabio Rabelo Melo
- Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
| | - Gunnar Pejler
- Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden.,Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden
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