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Cardenas AJ, Thomas KS, Broden MW, Ferraro NJ, Pires MM, John CM, Jarvis GA, Criss AK. Neisseria gonorrhoeae scavenges host sialic acid for Siglec-mediated, complement-independent suppression of neutrophil activation. mBio 2024:e0011924. [PMID: 38587424 DOI: 10.1128/mbio.00119-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Accepted: 03/12/2024] [Indexed: 04/09/2024] Open
Abstract
Gonorrhea, caused by the bacterium Neisseria gonorrhoeae (Gc), is characterized by neutrophilic influx to infection sites. Gc has developed mechanisms to resist killing by neutrophils that include modifications to its surface lipooligosaccharide (LOS). One such LOS modification is sialylation: Gc sialylates its terminal LOS sugars with cytidine-5'-monophosphate-N-acetylneuraminic acid, which is scavenged from the host using LOS sialyltransferase (Lst) since Gc cannot make its sialic acid. Sialylation enables sensitive strains of Gc to resist complement-mediated killing in a serum-dependent manner. However, little is known about the contribution of sialylation to complement-independent, direct Gc-neutrophil interactions. In the absence of complement, we found sialylated Gc expressing opacity-associated (Opa) proteins decreased the oxidative burst and granule exocytosis from primary human neutrophils. In addition, sialylated Opa+ Gc survived better than vehicle treated or Δlst Gc when challenged with neutrophils. However, Gc sialylation did not significantly affect Opa-dependent association with or internalization of Gc by neutrophils. Previous studies have implicated sialic acid-binding immunoglobulin-type lectins (Siglecs) in modulating neutrophil interactions with sialylated Gc. Blocking neutrophil Siglecs with antibodies that bind to their extracellular domains eliminated the ability of sialylated Opa+ Gc to suppress the oxidative burst and resist neutrophil killing. These findings highlight a new role for sialylation in Gc evasion of human innate immunity, with implications for the development of vaccines and therapeutics for gonorrhea. IMPORTANCE Neisseria gonorrhoeae, the bacterium that causes gonorrhea, is an urgent global health concern due to increasing infection rates, widespread antibiotic resistance, and its ability to thwart protective immune responses. The mechanisms by which Gc subverts protective immune responses remain poorly characterized. One way N. gonorrhoeae evades human immunity is by adding sialic acid that is scavenged from the host onto its lipooligosaccharide, using the sialyltransferase Lst. Here, we found that sialylation enhances N. gonorrhoeae survival from neutrophil assault and inhibits neutrophil activation, independently of the complement system. Our results implicate bacterial binding of sialic acid-binding lectins (Siglecs) on the neutrophil surface, which dampens neutrophil antimicrobial responses. This work identifies a new role for sialylation in protecting N. gonorrhoeae from cellular innate immunity, which can be targeted to enhance the human immune response in gonorrhea.
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Affiliation(s)
- Amaris J Cardenas
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, Virginia, USA
| | - Keena S Thomas
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, Virginia, USA
| | - Mary W Broden
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, Virginia, USA
| | - Noel J Ferraro
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, USA
| | - Marcos M Pires
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, USA
| | - Constance M John
- VA Medical Center and University of California, San Francisco, San Francisco, California, USA
| | - Gary A Jarvis
- VA Medical Center and University of California, San Francisco, San Francisco, California, USA
| | - Alison K Criss
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, Virginia, USA
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2
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Suárez Vázquez TA, López López N, Salinas Carmona MC. MASTer cell: chief immune modulator and inductor of antimicrobial immune response. Front Immunol 2024; 15:1360296. [PMID: 38638437 PMCID: PMC11024470 DOI: 10.3389/fimmu.2024.1360296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 02/26/2024] [Indexed: 04/20/2024] Open
Abstract
Mast cells have long been recognized for their involvement in allergic pathology through the immunoglobulin E (IgE)-mediated degranulation mechanism. However, there is growing evidence of other "non-canonical" degranulation mechanisms activated by certain pathogen recognition receptors. Mast cells release several mediators, including histamine, cytokines, chemokines, prostaglandins, and leukotrienes, to initiate and enhance inflammation. The chemical nature of activating stimuli influences receptors, triggering mechanisms for the secretion of formed and new synthesized mediators. Mast cells have more than 30 known surface receptors that activate different pathways for direct and indirect activation by microbes. Different bacterial strains stimulate mast cells through various ligands, initiating the innate immune response, which aids in clearing the bacterial burden. Mast cell interactions with adaptative immune cells also play a crucial role in infections. Recent publications revealed another "non-canonical" degranulation mechanism present in tryptase and chymase mast cells in humans and connective tissue mast cells in mice, occurring through the activation of the Mas-related G protein-coupled receptor (MRGPRX2/b2). This receptor represents a new therapeutic target alongside antibiotic therapy. There is an urgent need to reconsider and redefine the biological role of these MASTer cells of innate immunity, extending beyond their involvement in allergic pathology.
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Affiliation(s)
| | | | - Mario César Salinas Carmona
- Department of Immunology, School of Medicine and Dr. Jose Eleuterio Gonzalez University Hospital, Universidad Autónoma de Nuevo León, Monterrey, Mexico
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3
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Wu ML, Xie C, Li X, Sun J, Zhao J, Wang JH. Mast cell activation triggered by SARS-CoV-2 causes inflammation in brain microvascular endothelial cells and microglia. Front Cell Infect Microbiol 2024; 14:1358873. [PMID: 38638822 PMCID: PMC11024283 DOI: 10.3389/fcimb.2024.1358873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 03/15/2024] [Indexed: 04/20/2024] Open
Abstract
SARS-CoV-2-induced excessive inflammation in brain leads to damage of blood-brain barrier, hypoxic-ischemic injury, and neuron degeneration. The production of inflammatory cytokines by brain microvascular endothelial cells and microglia is reported to be critically associated with the brain pathology of COVID-19 patients. However, the cellular mechanisms for SARS-CoV-2-inducing activation of brain cells and the subsequent neuroinflammation remain to be fully delineated. Our research, along with others', has recently demonstrated that SARS-CoV-2-induced accumulation and activation of mast cells (MCs) in mouse lung could further induce inflammatory cytokines and consequent lung damages. Intracerebral MCs activation and their cross talk with other brain cells could induce neuroinflammation that play important roles in neurodegenerative diseases including virus-induced neuro-pathophysiology. In this study, we investigated the role of MC activation in SARS-CoV-2-induced neuroinflammation. We found that (1) SARS-CoV-2 infection triggered MC accumulation in the cerebrovascular region of mice; (2) spike/RBD (receptor-binding domain) protein-triggered MC activation induced inflammatory factors in human brain microvascular endothelial cells and microglia; (3) MC activation and degranulation destroyed the tight junction proteins in brain microvascular endothelial cells and induced the activation and proliferation of microglia. These findings reveal a cellular mechanism of SARS-CoV-2-induced neuroinflammation.
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Affiliation(s)
- Meng-Li Wu
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
| | - Chengzuo Xie
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Xin Li
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
| | - Jing Sun
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Jincun Zhao
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Jian-Hua Wang
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
- University of Chinese Academy of Sciences, Beijing, China
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4
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Picard LK, Niemann JA, Littwitz-Salomon E, Waldmann H, Watzl C. Restriction of Glycolysis Increases Serial Killing Capacity of Natural Killer Cells. Int J Mol Sci 2024; 25:2917. [PMID: 38474166 DOI: 10.3390/ijms25052917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 02/28/2024] [Accepted: 03/01/2024] [Indexed: 03/14/2024] Open
Abstract
Tumor cells rely heavily on glycolysis to meet their high metabolic demands. While this results in nutrient deprivation within the tumor microenvironment and has negative effects on infiltrating immune cells such as natural killer (NK) cells, it also creates a potential target for cancer therapies. Here we use Glupin, an inhibitor of glucose transporters, to study the effect of limited glucose uptake on NK cells and their anti-tumor functions. Glupin treatment effectively inhibited glucose uptake and restricted glycolysis in NK cells. However, acute treatment had no negative effect on NK cell cytotoxicity or cytokine production. Long-term restriction of glucose uptake via Glupin treatment only delayed NK cell proliferation, as they could switch to glutaminolysis as an alternative energy source. While IFN-γ production was partially impaired, long-term Glupin treatment had no negative effect on degranulation. Interestingly, the serial killing activity of NK cells was even slightly enhanced, possibly due to changes in NAD metabolism. This demonstrates that NK cell cytotoxicity is remarkably robust and insensitive to metabolic disturbances, which makes cellular metabolism an attractive target for immune-mediated tumor therapies.
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Affiliation(s)
- Lea Katharina Picard
- Department for Immunology, Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund (IfADo), D-44139 Dortmund, Germany
| | - Jens Alexander Niemann
- Department for Immunology, Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund (IfADo), D-44139 Dortmund, Germany
| | - Elisabeth Littwitz-Salomon
- Institute for Virology, Institute for Translational HIV Research, University Hospital Essen, D-45147 Essen, Germany
| | - Herbert Waldmann
- Max Planck Institute of Molecular Physiology, D-44227 Dortmund, Germany
- Faculty of Chemistry, Chemical Biology, Technical University Dortmund, D-44227 Dortmund, Germany
| | - Carsten Watzl
- Department for Immunology, Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund (IfADo), D-44139 Dortmund, Germany
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5
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Li Q, Tang X, Huang L, Wang T, Huang Y, Jiang S. Anti-allergic effect of vitamin C through inhibiting degranulation and regulating T H 1/T H 2 cell polarization. J Sci Food Agric 2024. [PMID: 38415860 DOI: 10.1002/jsfa.13419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 01/26/2024] [Accepted: 02/26/2024] [Indexed: 02/29/2024]
Abstract
BACKGROUND Food allergy has become a global public health problem. This study aimed to explore the possible anti-allergic effect of vitamin C (VC). A rat basophilic leukemia (RBL)-2H3 cell degranulation model was used to assess the effect of VC on degranulation in vitro, and an ovalbumin (OVA)-induced BALB/c mouse allergy model was used to assess the anti-allergy effect of VC in vivo. RESULTS In vitro, VC significantly attenuated the release of β-hexosaminidase, tryptase and histamine, and also reduced cytokine production (interleukins 4 and 6, tumor necrosis factor α) significantly (P < 0.05), with the inhibitory effect demonstrating a positive correlation with VC dose. In vivo, compared with the OVA group, the levels of serum immunoglobulins E and G1 of the VC low-dose (VCL) group (50 mg kg-1 ) and high-dose (VCH) group (200 mg·kg-1 ) were significantly reduced (P < 0.05). Furthermore, the plasma histamine level was also significantly decreased (P < 0.05). Moreover, TH 2 cell polarization in mice of the VCL and VCH groups was significantly inhibited (P < 0.05), promoting the TH 1/TH 2 cell polarization balance. Additionally, VC treatment enhanced the expression of CD80 (P < 0.05) in spleen and small intestine tissues, while significantly inhibiting the expression of CD86 (P < 0.05); notably, high-dose VC treatment was more effective. CONCLUSION VC exerted an anti-allergic effect through inhibiting degranulation and regulating TH 1/TH 2 cell polarization balance. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Qian Li
- College of Tourism and Culinary Science, Yangzhou University, Yangzhou, People's Republic of China
| | - Xinlei Tang
- College of Tourism and Culinary Science, Yangzhou University, Yangzhou, People's Republic of China
| | - Lu Huang
- College of Tourism and Culinary Science, Yangzhou University, Yangzhou, People's Republic of China
| | - Tao Wang
- College of Tourism and Culinary Science, Yangzhou University, Yangzhou, People's Republic of China
| | - Yutong Huang
- College of Tourism and Culinary Science, Yangzhou University, Yangzhou, People's Republic of China
| | - Songsong Jiang
- College of Tourism and Culinary Science, Yangzhou University, Yangzhou, People's Republic of China
- Key Laboratory of Chinese Cuisine Intangible Cultural Heritage Technology Inheritance, Ministry of Culture and Tourism, Yangzhou, People's Republic of China
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6
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Yang X, Lee D, Kim HW, Park BH, Lim C, Bae EJ. Cannabidiol Inhibits IgE-Mediated Mast Cell Degranulation and Anaphylaxis in Mice. Mol Nutr Food Res 2024; 68:e2300136. [PMID: 38059783 DOI: 10.1002/mnfr.202300136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 08/31/2023] [Indexed: 12/08/2023]
Abstract
SCOPE Cannabidiol (CBD), the most abundant non-psychoactive constituent of the plant Cannabis sativa, is known to possess immune modulatory properties. This study investigates the effects of CBD on mast cell degranulation in human and mouse primary mast cells and passive cutaneous anaphylaxis in mice. METHODS AND RESULTS Mouse bone marrow-derived mast cells and human cord-blood derived mast cells are generated. CBD suppressed antigen-stimulated mast cell degranulation in a concentration-dependent manner. Mechanistically, CBD inhibited both the phosphorylation of FcεRI downstream signaling molecules and calcium mobilization in mast cells, while exerting no effect on FcεRI expression and IgE binding to FcεRI. These suppressive effects are preserved in the mast cells that are depleted of type 1 (CB1) and type 2 (CB2) cannabinoid receptors, as well as in the presence of CB1 agonist, CB2 agonist, CB1 inverse agonist, and CB2 inverse agonist. CBD also inhibited the development of mast cells in a long-term culture. The intraperitoneal administration of CBD suppressed passive cutaneous anaphylaxis in mice as evidenced by a reduction in ear swelling and decrease in the number of degranulated mast cells. CONCLUSION Based on these results, the administration of CBD is a new therapeutic intervention in mast cell-associated anaphylactic diseases.
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Affiliation(s)
- Xiaohui Yang
- School of Pharmacy, Jeonbuk National University, Jeonju, 54896, Republic of Korea
| | - Dohyeon Lee
- School of Pharmacy, Jeonbuk National University, Jeonju, 54896, Republic of Korea
| | - Hyun-Woo Kim
- Korea Zoonosis Research Institute, Jeonbuk National University, Iksan, 54596, Republic of Korea
| | - Byung-Hyun Park
- Department of Biochemistry and Molecular Biology, Jeonbuk National University Medical School, Jeonju, 54896, Republic of Korea
| | - Changjin Lim
- School of Pharmacy, Jeonbuk National University, Jeonju, 54896, Republic of Korea
| | - Eun Ju Bae
- School of Pharmacy, Jeonbuk National University, Jeonju, 54896, Republic of Korea
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7
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Erratum: Approaching hemophagocytic lymphohistiocytosis. Front Immunol 2024; 15:1369687. [PMID: 38318167 PMCID: PMC10839569 DOI: 10.3389/fimmu.2024.1369687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 01/12/2024] [Indexed: 02/07/2024] Open
Abstract
[This corrects the article DOI: 10.3389/fimmu.2023.1210041.].
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8
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Cardenas AJ, Thomas KS, Broden MW, Ferraro NJ, John CM, Pires MM, Jarvis GA, Criss AK. Neisseria gonorrhoeae scavenges host sialic acid for Siglec-mediated, complement-independent suppression of neutrophil activation. bioRxiv 2024:2024.01.17.576097. [PMID: 38293026 PMCID: PMC10827150 DOI: 10.1101/2024.01.17.576097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
Gonorrhea, caused by the bacterium Neisseria gonorrhoeae (Gc), is characterized by neutrophil influx to infection sites. Gc has developed mechanisms to resist killing by neutrophils that include modifications to its surface lipooligosaccharide (LOS). One such LOS modification is sialylation: Gc sialylates its terminal LOS sugars with cytidine-5'-monophosphate-N-acetylneuraminic acid (CMP-NANA) scavenged from the host using LOS sialyltransferase (Lst), since Gc cannot make its own sialic acid. Sialylation enables sensitive strains of Gc to resist complement-mediated killing in a serum-dependent manner. However, little is known about the contribution of sialylation to complement-independent, direct Gc-neutrophil interactions. In the absence of complement, we found sialylated Gc expressing opacity-associated (Opa) proteins decreased the oxidative burst and granule exocytosis from primary human neutrophils. In addition, sialylated Opa+ Gc survived better than vehicle treated or Δlst Gc when challenged with neutrophils. However, Gc sialylation did not significantly affect Opa-dependent association with or internalization of Gc by neutrophils. Previous studies have implicated sialic acid-binding immunoglobulin-type lectins (Siglecs) in modulating neutrophil interactions with sialylated Gc. Blocking neutrophil Siglecs with antibodies that bind to their extracellular domains eliminated the ability of sialylated Opa+ Gc to suppress oxidative burst and resist neutrophil killing. These findings highlight a new role for sialylation in Gc evasion of human innate immunity, with implications for the development of vaccines and therapeutics for gonorrhea.
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Affiliation(s)
- Amaris J Cardenas
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, VA, USA
| | - Keena S. Thomas
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, VA, USA
| | - Mary W. Broden
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, VA, USA
| | - Noel J. Ferraro
- Department of Chemistry, University of Virginia, Charlottesville, VA, USA
| | - Constance M. John
- VA Medical Center and University of California, San Francisco, San Francisco, CA, USA
| | - Marcos M. Pires
- Department of Chemistry, University of Virginia, Charlottesville, VA, USA
| | - Gary A. Jarvis
- VA Medical Center and University of California, San Francisco, San Francisco, CA, USA
| | - Alison K. Criss
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, VA, USA
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9
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Storni F, Vogel M, Bachmann MF, Engeroff P. IgG in the control of FcεRI activation: a battle on multiple fronts. Front Immunol 2024; 14:1339171. [PMID: 38274816 PMCID: PMC10808611 DOI: 10.3389/fimmu.2023.1339171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 12/11/2023] [Indexed: 01/27/2024] Open
Abstract
The rising global incidence of IgE-mediated allergic reactions poses a significant challenge to the quality of life of affected individuals and to healthcare systems, with current treatments being limited in effectiveness, safety, and disease-modifying capabilities. IgE acts by sensitizing the high-affinity IgE receptor FcεRI expressed by mast cells and basophils, tuning these cells for inflammatory degranulation in response to future allergen encounters. In recent years, IgG has emerged as an essential negative regulator of IgE-dependent allergic inflammation. Mechanistically, studies have proposed different pathways by which IgG can interfere with the activation of IgE-mediated inflammation. Here, we briefly summarize the major proposed mechanisms of action by which IgG controls the IgE-FcεRI inflammatory axis and how those mechanisms are currently applied as therapeutic interventions for IgE-mediated inflammation.
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Affiliation(s)
- Federico Storni
- Department of Visceral Surgery and Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Department of BioMedical Research, University of Bern, Bern, Switzerland
| | - Monique Vogel
- Department of Visceral Surgery and Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Department of Rheumatology and Immunology, University Hospital Bern, Bern, Switzerland
| | - Martin F. Bachmann
- Department of BioMedical Research, University of Bern, Bern, Switzerland
- Department of Rheumatology and Immunology, University Hospital Bern, Bern, Switzerland
| | - Paul Engeroff
- Department of Visceral Surgery and Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Department of Rheumatology and Immunology, University Hospital Bern, Bern, Switzerland
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10
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Lazki-Hagenbach P, Kleeblatt E, Fukuda M, Ali H, Sagi-Eisenberg R. The Underlying Rab Network of MRGPRX2-Stimulated Secretion Unveils the Impact of Receptor Trafficking on Secretory Granule Biogenesis and Secretion. Cells 2024; 13:93. [PMID: 38201297 PMCID: PMC10778293 DOI: 10.3390/cells13010093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 12/18/2023] [Accepted: 12/28/2023] [Indexed: 01/12/2024] Open
Abstract
MRGPRX2, the human member of the MAS-related G-protein-coupled receptors (GPCRs), mediates the immunoglobulin E (IgE)-independent responses of a subset of mast cells (MCs) that are associated with itch, pain, neurogenic inflammation, and pseudoallergy to drugs. The mechanisms underlying the responses of MRGPRX2 to its multiple and diverse ligands are still not completely understood. Given the close association between GPCR location and function, and the key role played by Rab GTPases in controlling discrete steps along vesicular trafficking, we aimed to reveal the vesicular pathways that directly impact MRGPRX2-mediated exocytosis by identifying the Rabs that influence this process. For this purpose, we screened 43 Rabs for their functional and phenotypic impacts on MC degranulation in response to the synthetic MRGPRX2 ligand compound 48/80 (c48/80), which is often used as the gold standard of MRGPRX2 ligands, or to substance P (SP), an important trigger of neuroinflammatory MC responses. Results of this study highlight the important roles played by macropinocytosis and autophagy in controlling MRGPRX2-mediated exocytosis, demonstrating a close feedback control between the internalization and post-endocytic trafficking of MRGPRX2 and its triggered exocytosis.
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Affiliation(s)
- Pia Lazki-Hagenbach
- Department of Cell and Developmental Biology, Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel; (P.L.-H.); (E.K.)
| | - Elisabeth Kleeblatt
- Department of Cell and Developmental Biology, Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel; (P.L.-H.); (E.K.)
| | - Mitsunori Fukuda
- Laboratory of Membrane Trafficking Mechanisms, Department of Integrative Life Sciences, Graduate School of Life Sciences, Tohoku University, Aobayama, Aoba-ku, Sendai 980-8578, Miyagi, Japan;
| | - Hydar Ali
- Department of Basic and Translational Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA;
| | - Ronit Sagi-Eisenberg
- Department of Cell and Developmental Biology, Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel; (P.L.-H.); (E.K.)
- Sagol School of Neuroscience, Tel Aviv University, Tel Aviv 6997801, Israel
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11
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Pedicini L, Smith J, Savic S, McKeown L. Rab46: a novel player in mast cell function. Discov Immunol 2023; 3:kyad028. [PMID: 38567292 PMCID: PMC10917158 DOI: 10.1093/discim/kyad028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 11/01/2023] [Accepted: 12/18/2023] [Indexed: 04/04/2024]
Abstract
Mast cells are infamous for mediating allergic and inflammatory diseases due to their capacity of rapidly releasing a wide range of inflammatory mediators stored in cytoplasmic granules. However, mast cells also have several important physiological roles that involve selective and agonist-specific release of these active mediators. While a filtering mechanism at the plasma membrane could regulate the selective release of some cargo, the plethora of stored cargo and the diversity of mast cell functions suggests the existence of granule subtypes with distinct trafficking pathways. The molecular mechanisms underlying differential trafficking and exocytosis of these granules are not known, neither is it clear how granule trafficking is coupled to the stimulus. In endothelial cells, a Rab GTPase, Rab46, responds to histamine but not thrombin signals, and this regulates the trafficking of a subpopulation of endothelial-specific granules. Here, we sought to explore, for the first time, if Rab46 plays a role in mast cell function. We demonstrate that Rab46 is highly expressed in human and murine mast cells, and Rab46 genetic deletion has an effect on mast cell degranulation that depends on both stimuli and mast cell subtype. This initial insight into the contribution of Rab46 to mast cell function and the understanding of the role of Rab46 in stimuli-dependent trafficking in other cell types necessitates further investigations of Rab46 in mast cell granular trafficking so that novel and specific therapeutic targets for treatment of the diverse pathologies mediated by mast cells can be developed.
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Affiliation(s)
- Lucia Pedicini
- Leeds Institute of Cardiovascular and Metabolic Medicine, Faculty of Medicine and Health, University of Leeds, Leeds LS2 9JT, UK
| | - Jessica Smith
- Leeds Institute of Cardiovascular and Metabolic Medicine, Faculty of Medicine and Health, University of Leeds, Leeds LS2 9JT, UK
| | - Sinisa Savic
- Department of Clinical Immunology and Allergy, St James’s University Hospital, Leeds, UK
- National Institute for Health Research-Leeds Biomedical Research Centre and Leeds Institute of Rheumatic and Musculoskeletal Medicine, Wellcome Trust Brenner Building, St James’s University Hospital, Leeds, UK
| | - Lynn McKeown
- Leeds Institute of Cardiovascular and Metabolic Medicine, Faculty of Medicine and Health, University of Leeds, Leeds LS2 9JT, UK
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12
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Sugiyama Y, Kawarai S, Ansai S, Bist P, Abraham SN, Maruo T. Cutaneous anaphylactoid reaction to polyoxyethylene hydrogenated castor oil in dogs. Vet Dermatol 2023. [PMID: 38111025 DOI: 10.1111/vde.13228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 08/07/2023] [Accepted: 12/05/2023] [Indexed: 12/20/2023]
Abstract
BACKGROUND Polyoxyethylene hydrogenated castor oil (HCO ethoxylates) is a nonionic surfactant used as an excipient for ointments and injections in human and veterinary drugs. Several polyethylene glycol (PEG) derivatives can be obtained depending on the number of moles of ethylene oxide (EO). HCO ethoxylates have the potential to cause anaphylactoid reactions. There is little published information about these types of reactions in dogs. OBJECTIVE To determine the potential for HCO-ethoxylate-containing drugs to cause anaphylactoid reactions in dogs, employing intradermal testing (IDT) with various concentrations of HCO ethoxylates (HCO-25, -40, -60 and -80). ANIMALS Four healthy male laboratory dogs. MATERIALS AND METHODS We performed IDT with drugs containing HCO ethoxylates and HCO ethoxylates alone to determine threshold concentrations. The IDT scores and threshold concentrations were compared. Analysis of skin biopsies from IDT sites was used to measure the percentage of degranulated mast cells. The effect of histamine at IDT sites was investigated by pre-treatment with an antihistamine. RESULTS All HCO-ethoxylate-containing drugs caused a wheal-and-flare reaction. The threshold concentrations (0.001% and 0.00001%) of each HCO-ethoxylate depended on the number of moles of EO (p < 0.05). Mast cell degranulation was enhanced by all HCO ethoxylates. The HCO-60-induced reaction was suppressed by an oral antihistamine. CONCLUSIONS AND CLINICAL RELEVANCE The threshold concentration can serve as a consideration for developing safe new drug formulations and for clinical decision-making around using drugs containing PEG derivatives. IDT is useful to predict the risk of adverse effects. Antihistamines could demonstrate a prophylactic effect.
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Affiliation(s)
- Yukina Sugiyama
- Laboratory of Small Animal Clinics, Veterinary Teaching Hospital, Azabu University, Sagamihara, Kanagawa, Japan
- Sugiyama Veterinary Clinic, Shizuoka, Japan
| | - Shinpei Kawarai
- Laboratory of Small Animal Clinics, Veterinary Teaching Hospital, Azabu University, Sagamihara, Kanagawa, Japan
| | - Shinichi Ansai
- Division of Dermatology and Dermatopathology, Nippon Medical School, Musashi Kosugi Hospital, Kawasaki, Kanagawa, Japan
| | - Pradeep Bist
- Program in Emerging Infectious Diseases, Duke-National University of Singapore, Singapore City, Singapore
| | - Soman N Abraham
- Program in Emerging Infectious Diseases, Duke-National University of Singapore, Singapore City, Singapore
- Department of Pathology, Duke University Medical Center, Durham, North Carolina, USA
- Department of Immunology, Duke University Medical Center, Durham, North Carolina, USA
- Department of Molecular Genetics & Microbiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Takuya Maruo
- Laboratory of Veterinary Radiology, Department of Veterinary Medicine, School of Veterinary Medicine, Azabu University, Sagamihara, Kanagawa, Japan
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Choi BY, Yang EM, Jung HW, Shin MK, Jo J, Cha HY, Park HS, Kang HC, Ye YM. Anti-heat shock protein 10 IgG in chronic spontaneous urticaria: Relation with miRNA-101-5p and platelet-activating factor. Allergy 2023; 78:3166-3177. [PMID: 37415527 DOI: 10.1111/all.15810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 06/02/2023] [Accepted: 06/06/2023] [Indexed: 07/08/2023]
Abstract
BACKGROUND Anti-heat shock protein (HSP) autoantibodies are detected in autoimmune diseases. We sought to ascertain whether anti-HSP10 IgG is present in patients with CSU and to elucidate the role of HSP10 in CSU pathogenesis. METHOD Using a human proteome microarray, six potential autoantibodies had higher expression in 10 CSU samples compared with 10 normal controls (NCs). Among them, HSP10 IgG autoantibody was quantified by immune dot-blot assay in sera from 86 CSU patients and 44 NCs. The serum levels of HSP10 and microRNA-101-5p were measured in CSU patients and NCs. The effects of HSP10 and miR-101-5p on mast cell degranulation in response to IgE, compound 48/80, and platelet-activating factor (PAF) were investigated. RESULTS CSU patients had higher IgG positivity to HSP10 (40.7% vs. 11.4%, p = .001), lower serum HSP10 levels (5.8 ± 3.6 vs. 12.2 ± 6.6 pg/mL, p < .001) than in NCs, and their urticaria severity was associated with anti-HSP10 IgG positivity, while HSP10 levels were related to urticaria control status. MiR-101-5p was increased in CSU patients. PAF enhanced IL4 production in PBMCs from CSU patients. IL-4 upregulated miR-101-5p and reduced HSP10 expression in keratinocytes. Transfection of miR-101-5p reduced HSP10 expression in keratinocytes. MiR-101-5p promoted PAF-induced mast cell degranulation, while HSP10 specifically prevented it. CONCLUSION A new autoantibody, anti-HSP10 IgG was detected in CSU patients, which showed a significant correlation with UAS7 scores. A decreased serum HSP10 level was associated with upregulation of miR-101-5p due to increased IL-4 and PAF in CSU patients. Modulation of miR-101-5p and HSP10 may be a novel therapeutic approach for CSU.
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Affiliation(s)
- Bo Youn Choi
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, South Korea
| | - Eun-Mi Yang
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, South Korea
| | - Hae-Won Jung
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, South Korea
| | - Min-Kyoung Shin
- Department of Pharmacology, Ajou University School of Medicine, Suwon, South Korea
- Center for Convergence Research of Neurological Disorders, Ajou University School of Medicine, Suwon, South Korea
| | - Junghyun Jo
- Department of Pharmacology, Ajou University School of Medicine, Suwon, South Korea
- Center for Convergence Research of Neurological Disorders, Ajou University School of Medicine, Suwon, South Korea
| | - Hyun-Young Cha
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, South Korea
| | - Hae-Sim Park
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, South Korea
| | - Ho-Chul Kang
- Department of Physiology, Ajou University School of Medicine, Suwon, South Korea
| | - Young-Min Ye
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, South Korea
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Liu J, Qing L, He Y, Zhu Q, Xu W, Wu J. The involvement of transient receptor potential channels in mast cell activation by microbubbles. J Cell Mol Med 2023; 27:3628-3636. [PMID: 37680043 PMCID: PMC10660621 DOI: 10.1111/jcmm.17947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 08/25/2023] [Accepted: 08/29/2023] [Indexed: 09/09/2023] Open
Abstract
This study was to explore the activation of mast cells by microbubbles, with the focus on transient receptor potential (TRP) channels mediated degranulation and calcium influx. Bone marrow-derived mast cells (BMMCs) were primarily obtained from femurs in mice and induced differentiation for 4 weeks. After the purity identification, BMMCs were contacted by homogeneous microbubbles with the diameter of 1 mm for 1 h. β-hexosaminidase and histamine levels in supernatants were assessed by enzyme-linked immunosorbent assay (ELISA) and the CD63 expression was tested by flow cytometry. The intracellular calcium binding with Fluo-4 AM dyes in BMMCs was observed under the fluorescence microscope and the mean fluorescence intensity was quantitatively measured by flow cytometry. β-hexosaminidase release, histamine concentration, CD63 expression and calcium influx were significantly increased in BMMCs group upon microbubble stimulation compared to the control groups. After preconditioning with the available inhibitors and microbubble contact, only transient receptor potential vanilloid 1 (TRPV1) and TRPV4 inhibitors robustly suppressed the microbubble-induced degranulation. Likewise, the elevated fluorescence intensity of cytosolic calcium level was also significantly weaken. The results demonstrated microbubble stimulus effectively promoted BMMCs degranulation, which could be substantially restrained by inhibitors targeted for blocking TRPV1 or TRPV4 channel. The alternation of intracellular calcium level in BMMCs was consistent with the changes of degranulation capacity. It's suggested that the activation of BMMCs by microbubbles may involve specific TRP calcium dependent channels.
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Affiliation(s)
- Jia Liu
- Department of Dermatology, Changhai HospitalSecond Military Medical University (The First Affiliated Hospital of Naval Medical University)ShanghaiChina
| | - Long Qing
- Department of Naval Diving Medicine, Naval Medical CenterNaval Medical UniversityShanghaiChina
| | - Yufei He
- Department of Dermatology, Changhai HospitalSecond Military Medical University (The First Affiliated Hospital of Naval Medical University)ShanghaiChina
| | - Qihui Zhu
- Department of Dermatology, Changhai HospitalSecond Military Medical University (The First Affiliated Hospital of Naval Medical University)ShanghaiChina
| | - Weigang Xu
- Department of Diving and Hyperbaric Medical Research, Naval Medical CenterNaval Medical UniversityShanghaiChina
| | - Jianhua Wu
- Department of Dermatology, Changhai HospitalSecond Military Medical University (The First Affiliated Hospital of Naval Medical University)ShanghaiChina
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Gigon L, Fettrelet T, Miholic M, McLeish KR, Yousefi S, Stojkov D, Simon HU. Syntaxin-4 and SNAP23 are involved in neutrophil degranulation, but not in the release of mitochondrial DNA during NET formation. Front Immunol 2023; 14:1272699. [PMID: 37885878 PMCID: PMC10599146 DOI: 10.3389/fimmu.2023.1272699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 09/26/2023] [Indexed: 10/28/2023] Open
Abstract
Neutrophils are a specialized subset of white blood cells, which have the ability to store pre-formed mediators in their cytoplasmic granules. Neutrophils are well-known effector cells involved in host protection against pathogens through diverse mechanisms such as phagocytosis, degranulation, extracellular traps, and oxidative burst. In this study, we provide evidence highlighting the significance of the SNARE proteins syntaxin-4 and synaptosomal-associated protein (SNAP) 23 in the release of azurophilic granules, specific granules, and the production of reactive oxygen species in human neutrophils. In contrast, the specific blockade of either syntaxin-4 or SNAP23 did not prevent the release of mitochondrial dsDNA in the process of neutrophil extracellular trap (NET) formation. These findings imply that degranulation and the release of mitochondrial dsDNA involve at least partially distinct molecular pathways in neutrophils.
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Affiliation(s)
- Lea Gigon
- Institute of Pharmacology, University of Bern, Bern, Switzerland
| | | | - Marta Miholic
- Institute of Pharmacology, University of Bern, Bern, Switzerland
- Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - Kenneth R. McLeish
- Department of Medicine, University of Louisville School of Medicine, Louisville, KY, United States
| | - Shida Yousefi
- Institute of Pharmacology, University of Bern, Bern, Switzerland
| | - Darko Stojkov
- Institute of Pharmacology, University of Bern, Bern, Switzerland
| | - Hans-Uwe Simon
- Institute of Pharmacology, University of Bern, Bern, Switzerland
- Institute of Biochemistry, Brandenburg Medical School, Neuruppin, Germany
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16
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McGrouther DA. Hand infection: a management approach based on a new understanding of combined bacterial and neutrophil mediated tissue damage. J Hand Surg Eur Vol 2023; 48:838-848. [PMID: 37218740 DOI: 10.1177/17531934231174819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Concepts of tissue damage from sepsis are rooted in the works of Pasteur regarding colonization by microorganisms, and Lister's observation of avoiding suppuration by their exclusion. The reactive inflammation has been considered a beneficial defence mechanism. A more complex biology is now unfolding of pathogenic mechanisms with toxins produced by the organisms now being placed in a broad category of virulence factors. Neutrophils are key cells in providing innate immunity and their trafficking to sites of infection results in entry to the extracellular space where they attack pathogens by release of the contents of neutrophil granules and neutrophil extracellular traps. There is now considerable evidence that much of the tissue damage in infection is due to excessive host innate immunological reaction; a hyperinflammatory response, whether localized or systemic. In addition to traditional surgical methods of drainage and decompression there is now a focus on dilution of inflammatory mediators. This emerging knowledge can potentially alter the way we approach hand infections.
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Sanchez MB, Vasconcelos Cordoba B, Pavlovsky C, Moiraghi B, Varela A, Custidiano R, Fernandez I, Freitas MJ, Ventriglia MV, Bendek G, Mariano R, Mela Osorio MJ, Pavlovsky MA, García de Labanca A, Foncuberta C, Giere I, Vera M, Juni M, Mordoh J, Sanchez Avalos JC, Levy EM, Bianchini M. In-depth characterization of NK cell markers from CML patients who discontinued tyrosine kinase inhibitor therapy. Front Immunol 2023; 14:1241600. [PMID: 37818372 PMCID: PMC10561287 DOI: 10.3389/fimmu.2023.1241600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 09/07/2023] [Indexed: 10/12/2023] Open
Abstract
Introduction Treatment-free remission (TFR) in patients with chronic myeloid leukemia in chronic phase is considered a safe option if suitable molecular monitoring is available. However, the question arises as to which factors can contribute to the maintenance of TFR, and immunologic surveillance of the remaining leukemic cells is believed to be one of them. Argentina Stop Trial is an open-label, single-arm, multicenter trial assessing TFR after tyrosine kinase inhibitors interruption, that after more than 4 years showed a successful TFR rate of 63%. Methods In this context, we set up an immunological study by flow cytometry in order to analyze specific NK cell subsets from peripheral blood patient samples both at the time of discontinuation as well as during the subsequent months. Results At the time of discontinuation, patients show a mature NK cell phenotype, probably associated to TKI treatment. However, 3 months after discontinuation, significant changes in several NK cell receptors occurred. Patients with a higher proportion of CD56dim NK and PD-1+ NK cells showed better chances of survival. More interestingly, non-relapsing patients also presented a subpopulation of NK cells with features associated with the expansion after cytomegalovirus infection (expression of CD57+NKG2C+), and higher proportion of NKp30 and NKp46 natural cytotoxicity receptors, which resulted in greater degranulation and associated with better survival (p<0.0001). Discussion This NK cell subset could have a protective role in patients who do not relapse, thus further characterization could be useful for patients in sustained deep molecular response.
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Affiliation(s)
- María Belén Sanchez
- Centro de Investigaciones Oncológicas, Fundación Cáncer (CIO-FUCA), Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina
| | - Bianca Vasconcelos Cordoba
- Centro de Investigaciones Oncológicas, Fundación Cáncer (CIO-FUCA), Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina
| | - Carolina Pavlovsky
- Hematology Department, Fundación para combatir la leucemia (FUNDALEU), Buenos Aires, Argentina
| | - Beatriz Moiraghi
- Hematology Department, Hospital José María Ramos Mejía, Buenos Aires, Argentina
| | - Ana Varela
- Hematology Department, Hospital José María Ramos Mejía, Buenos Aires, Argentina
| | - Rosario Custidiano
- Hematology Department, Instituto Alexander Fleming, Buenos Aires, Argentina
| | - Isolda Fernandez
- Hematology Department, Fundación para combatir la leucemia (FUNDALEU), Buenos Aires, Argentina
| | | | | | - Georgina Bendek
- Hematology Department, Hospital Italiano, Buenos Aires, Argentina
| | - Romina Mariano
- Hematology Department, Hospital San Martín, Paraná, Entre Ríos, Argentina
| | - María José Mela Osorio
- Hematology Department, Fundación para combatir la leucemia (FUNDALEU), Buenos Aires, Argentina
| | - Miguel Arturo Pavlovsky
- Hematology Department, Fundación para combatir la leucemia (FUNDALEU), Buenos Aires, Argentina
| | | | - Cecilia Foncuberta
- Hematology Department, Instituto Alexander Fleming, Buenos Aires, Argentina
| | - Isabel Giere
- Hematology Department, Fundación para combatir la leucemia (FUNDALEU), Buenos Aires, Argentina
| | - Masiel Vera
- Hematology Department, Instituto Alexander Fleming, Buenos Aires, Argentina
| | - Mariana Juni
- Hematology Department, Fundación para combatir la leucemia (FUNDALEU), Buenos Aires, Argentina
| | - José Mordoh
- Centro de Investigaciones Oncológicas, Fundación Cáncer (CIO-FUCA), Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina
| | | | - Estrella Mariel Levy
- Centro de Investigaciones Oncológicas, Fundación Cáncer (CIO-FUCA), Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina
| | - Michele Bianchini
- Centro de Investigaciones Oncológicas, Fundación Cáncer (CIO-FUCA), Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina
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Vorobjeva NV, Chelombitko MA, Sud’ina GF, Zinovkin RA, Chernyak BV. Role of Mitochondria in the Regulation of Effector Functions of Granulocytes. Cells 2023; 12:2210. [PMID: 37759432 PMCID: PMC10526294 DOI: 10.3390/cells12182210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 09/03/2023] [Accepted: 09/04/2023] [Indexed: 09/29/2023] Open
Abstract
Granulocytes (neutrophils, eosinophils, and basophils) are the most abundant circulating cells in the innate immune system. Circulating granulocytes, primarily neutrophils, can cross the endothelial barrier and activate various effector mechanisms to combat invasive pathogens. Eosinophils and basophils also play an important role in allergic reactions and antiparasitic defense. Granulocytes also regulate the immune response, wound healing, and tissue repair by releasing of various cytokines and lipid mediators. The effector mechanisms of granulocytes include the production of reactive oxygen species (ROS), degranulation, phagocytosis, and the formation of DNA-containing extracellular traps. Although all granulocytes are primarily glycolytic and have only a small number of mitochondria, a growing body of evidence suggests that mitochondria are involved in all effector functions as well as in the production of cytokines and lipid mediators and in apoptosis. It has been shown that the production of mitochondrial ROS controls signaling pathways that mediate the activation of granulocytes by various stimuli. In this review, we will briefly discuss the data on the role of mitochondria in the regulation of effector and other functions of granulocytes.
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Affiliation(s)
- Nina V. Vorobjeva
- Department Immunology, Biology Faculty, Lomonosov Moscow State University, 119234 Moscow, Russia;
| | - Maria A. Chelombitko
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia; (M.A.C.); (R.A.Z.)
- The Russian Clinical Research Center for Gerontology, Ministry of Healthcare of the Russian Federation, Pirogov Russian National Research Medical University, 129226 Moscow, Russia
| | - Galina F. Sud’ina
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia; (M.A.C.); (R.A.Z.)
| | - Roman A. Zinovkin
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia; (M.A.C.); (R.A.Z.)
- The Russian Clinical Research Center for Gerontology, Ministry of Healthcare of the Russian Federation, Pirogov Russian National Research Medical University, 129226 Moscow, Russia
| | - Boris V. Chernyak
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia; (M.A.C.); (R.A.Z.)
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Abstract
Amyotrophic lateral sclerosis (ALS) is a chronic, progressive neurodegenerative disease characterized by the loss of motor neurons. Dysregulated peripheral immunity has been identified as a hallmark of ALS. Neutrophils, as the front-line responders of innate immunity, contribute to host defense through pathogen clearance. However, they can concurrently play a detrimental role in chronic inflammation. With the unveiling of novel functions of neutrophils in neurodegenerative diseases, it becomes essential to review our current understanding of neutrophils and to recognize the gap in our knowledge about their role in ALS. Thus, a detailed comprehension of the biological processes underlying neutrophil-induced pathogenesis in ALS may assist in identifying potential cell-based therapeutic strategies to delay disease progression.
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Affiliation(s)
- Wen Cao
- Department of Neurology, Peking University Third Hospital, Beijing, China
- Beijing Key Laboratory of Biomarker and Translational Research in Neurodegenerative Disorders, Beijing, China
- Key Laboratory for Neuroscience, National Health Commission/Ministry of Education, Peking University, Beijing, China
| | - Dongsheng Fan
- Department of Neurology, Peking University Third Hospital, Beijing, China
- Beijing Key Laboratory of Biomarker and Translational Research in Neurodegenerative Disorders, Beijing, China
- Key Laboratory for Neuroscience, National Health Commission/Ministry of Education, Peking University, Beijing, China
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20
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Tsai Z, Carver KA, Gong HH, Kosai K, Deng JC, Worley MJ. Detailed Mechanisms Underlying Neutrophil Bactericidal Activity against Streptococcus pneumoniae. Biomedicines 2023; 11:2252. [PMID: 37626748 PMCID: PMC10452576 DOI: 10.3390/biomedicines11082252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 07/28/2023] [Accepted: 08/02/2023] [Indexed: 08/27/2023] Open
Abstract
Neutrophils are an essential cellular component of innate immunity and control bacterial infections through a combination of intracellular and extracellular killing methods. Although the importance of neutrophils has been established, the exact methods used to handle particular bacterial challenges and the efficiency of bacterial killing remain not well understood. In this study, we addressed how neutrophils eliminate Streptococcus pneumoniae (Spn), a leading cause of community acquired and post-influenza bacterial pneumonia. We analyzed killing methods with variable bacterial:neutrophil concentrations and following priming with PAM3CSK4 (P3CSK), an agonist for Toll-like-receptor 2 (TLR2). Our results show that murine neutrophils display surprisingly weak bactericidal activity against Spn, employing a predominantly extracellular mode of killing at lower concentrations of bacteria, whereas challenges with higher bacterial numbers induce both extracellular and intracellular elimination modes but require TLR2 activation. TLR2 activation increased reactive oxygen species (ROS) and neutrophil extracellular trap (NET) formation in response to Spn. Despite this, supernatants from P3CSK-stimulated neutrophils failed to independently alter bacterial replication. Our study reveals that unstimulated neutrophils are capable of eliminating bacteria only at lower concentrations via extracellular killing methods, whereas TLR2 activation primes neutrophil-mediated killing using both intracellular and extracellular methods under higher bacterial burdens.
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Affiliation(s)
- Zachary Tsai
- Division of Pulmonary and Critical Care Medicine, University of Michigan School of Medicine, Ann Arbor, MI 48105, USA (K.A.C.); (K.K.); (M.J.W.)
| | - Kyle A. Carver
- Division of Pulmonary and Critical Care Medicine, University of Michigan School of Medicine, Ann Arbor, MI 48105, USA (K.A.C.); (K.K.); (M.J.W.)
- Research Service and Pulmonary Section, Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, MI 48105, USA;
| | - Henry H. Gong
- Research Service and Pulmonary Section, Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, MI 48105, USA;
| | - Kosuke Kosai
- Division of Pulmonary and Critical Care Medicine, University of Michigan School of Medicine, Ann Arbor, MI 48105, USA (K.A.C.); (K.K.); (M.J.W.)
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8523, Japan
| | - Jane C. Deng
- Division of Pulmonary and Critical Care Medicine, University of Michigan School of Medicine, Ann Arbor, MI 48105, USA (K.A.C.); (K.K.); (M.J.W.)
- Research Service and Pulmonary Section, Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, MI 48105, USA;
| | - Matthew J. Worley
- Division of Pulmonary and Critical Care Medicine, University of Michigan School of Medicine, Ann Arbor, MI 48105, USA (K.A.C.); (K.K.); (M.J.W.)
- Research Service and Pulmonary Section, Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, MI 48105, USA;
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Huang Y, Zhu Z, Li W, Ge Y, Li Y, Wang J, Peng X, Lin L, Li J, Liu CY, Li L. ELK4 exerts opposite roles in cytokine/chemokine production and degranulation in activated mast cells. Front Immunol 2023; 14:1171380. [PMID: 37529050 PMCID: PMC10389778 DOI: 10.3389/fimmu.2023.1171380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 06/14/2023] [Indexed: 08/03/2023] Open
Abstract
The proliferative potential of mast cells after activation for 3-4h was found to be decreased, which suggests that mast cell degranulation and cell proliferation are differentially regulated. ELK4, a member of the ternary complex factor (TCF) subfamily of Ets transcription factors, is one of the downstream effectors of MAPK signaling that is critical for cell proliferation. And Elk4 has been identified to be vital for macrophage activation in response to zymosan and the transcriptional response to 12-O-tetrade canoyl phorbol-13-acetate (TPA) stimulation in fibroblast. However, the effect of ELK4 on the mast cell transcriptional response to FcϵRI and GPCR mediated activation and its potential functional significance in mast cells remain unclear. Here, we showed that ELK4 expression is downregulated in activated mast cells. Elk4 knockout suppresses cell proliferation and impedes the cell cycle in bone marrow-derived mast cells (BMMCs), which is associated with decreased transcription of cell cycle genes. Additionally, the transcriptional activation of cytokines and chemokines is diminished while mast cell degranulation is enhanced in Elk4 knockout BMMCs. Mechanistically, ELK4 might positively modulate Hdc, Ccl3 and Ccl4 transcription by interacting with MITF and negatively regulate the transcription of degranulation-related genes by complexing with SIRT6. Overall, our study identifies a new physiological role of the transcription factor ELK4 in mast cell proliferation and activation.
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Affiliation(s)
- Yuji Huang
- Department of Laboratory Medicine, Shanghai General Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Zhehui Zhu
- Department of Colorectal Surgery, Shanghai Engineering Research Center of Colorectal Cancer Minimally Invasive Technology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Weize Li
- Department of Laboratory Medicine, Shanghai General Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Yiqin Ge
- Department of Laboratory Medicine, Shanghai General Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Yanning Li
- Department of Laboratory Medicine, Shanghai General Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Juan Wang
- Department of Laboratory Medicine, Shanghai General Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Xia Peng
- Department of Laboratory Medicine, Shanghai General Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Lihui Lin
- Department of Laboratory Medicine, Shanghai General Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Jia Li
- Department of Laboratory Medicine, Shanghai General Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Chen-Ying Liu
- Department of Colorectal and Anal Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Li Li
- Department of Laboratory Medicine, Shanghai General Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
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Cross-Najafi AA, Farag K, Isidan A, Li W, Zhang W, Lin Z, Walsh JR, Lopez K, Park Y, Higgins NG, Cooper DK, Ekser B, Li P. Co-expression of HLA-E and HLA-G on genetically modified porcine endothelial cells attenuates human NK cell-mediated degranulation. Front Immunol 2023; 14:1217809. [PMID: 37529053 PMCID: PMC10387534 DOI: 10.3389/fimmu.2023.1217809] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 06/30/2023] [Indexed: 08/03/2023] Open
Abstract
Natural killer (NK) cells play an important role in immune rejection in solid organ transplantation. To mitigate human NK cell activation in xenotransplantation, introducing inhibitory ligands on xenografts via genetic engineering of pigs may protect the graft from human NK cell-mediated cytotoxicity and ultimately improve xenograft survival. In this study, non-classical HLA class I molecules HLA-E and HLA-G were introduced in an immortalized porcine liver endothelial cell line with disruption of five genes (GGTA1, CMAH, β4galNT2, SLA-I α chain, and β-2 microglobulin) encoding three major carbohydrate xenoantigens (αGal, Neu5Gc, and Sda) and swine leukocyte antigen class I (SLA-I) molecules. Expression of HLA-E and/or HLA-G on pig cells were confirmed by flow cytometry. Endogenous HLA-G molecules as well as exogenous HLA-G VL9 peptide could dramatically enhance HLA-E expression on transfected pig cells. We found that co-expression of HLA-E and HLA-G on porcine cells led to a significant reduction in human NK cell activation compared to the cells expressing HLA-E or HLA-G alone and the parental cell line. NK cell activation was assessed by analysis of CD107a expression in CD3-CD56+ population gated from human peripheral blood mononuclear cells. CD107a is a sensitive marker of NK cell activation and correlates with NK cell degranulation and cytotoxicity. HLA-E and/or HLA-G on pig cells did not show reactivity to human sera IgG and IgM antibodies. This in vitro study demonstrated that co-expression of HLA-E and HLA-G on genetically modified porcine endothelial cells provided a superior inhibition in human xenoreactive NK cells, which may guide further genetic engineering of pigs to prevent human NK cell mediated rejection.
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Affiliation(s)
- Arthur A. Cross-Najafi
- Transplant Division, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Kristine Farag
- Transplant Division, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Abdulkadir Isidan
- Transplant Division, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Wei Li
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Wenjun Zhang
- Transplant Division, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Zhansong Lin
- Ragon Institute of Massachusetts General Hospital (MGH), Massachusetts Institute of Technology (MIT), and Harvard, Cambridge, MA, United States
| | - Julia R. Walsh
- Transplant Division, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Kevin Lopez
- Transplant Division, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Yujin Park
- Transplant Division, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Nancy G. Higgins
- Transplant Immunology, Indiana University Health, Indianapolis, IN, United States
| | - David K.C. Cooper
- Center for Transplantation Sciences, Massachusetts General Hospital/Harvard Medical School, Cambridge, MA, United States
| | - Burcin Ekser
- Transplant Division, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Ping Li
- Transplant Division, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
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Hicks NJ, Crozier RWE, MacNeil AJ. JNK signaling during IL-3-mediated differentiation contributes to the c-kit-potentiated allergic inflammatory capacity of mast cells. J Leukoc Biol 2023; 114:92-105. [PMID: 37141385 DOI: 10.1093/jleuko/qiad050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 04/24/2023] [Accepted: 05/01/2023] [Indexed: 05/06/2023] Open
Abstract
Mast cells are leukocytes that mediate various aspects of immunity and drive allergic hypersensitivity pathologies. Mast cells differentiate from hematopoietic progenitor cells in a manner that is largely IL-3 dependent. However, molecular mechanisms, including the signaling pathways that control this process, have yet to be thoroughly investigated. Here, we examine the role of the ubiquitous and critical mitogen-activated protein kinase signaling pathway due to its position downstream of the IL-3 receptor. Hematopoietic progenitor cells were harvested from the bone marrow of C57BL/6 mice and differentiated to bone marrow-derived mast cells in the presence of IL-3 and mitogen-activated protein kinase inhibitors. Inhibition of the JNK node of the mitogen-activated protein kinase pathway induced the most comprehensive changes to the mature mast cell phenotype. Bone marrow-derived mast cells differentiated during impaired JNK signaling expressed impaired c-kit levels on the mast cell surface, first detected at week 3 of differentiation. Following 1 wk of inhibitor withdrawal and subsequent stimulation of IgE-sensitized FcεRI receptors with allergen (TNP-BSA) and c-kit receptors with stem cell factor, JNK-inhibited bone marrow-derived mast cells exhibited impediments in early-phase mediator release through degranulation (80% of control), as well as late-phase secretion of CCL1, CCL2, CCL3, TNF, and IL-6. Experiments with dual stimulation conditions (TNP-BSA + stem cell factor or TNP-BSA alone) showed that impediments in mediator secretion were found to be mechanistically linked to reduced c-kit surface levels. This study is the first to implicate JNK activity in IL-3-mediated mast cell differentiation and also identifies development as a critical and functionally determinative period.
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Affiliation(s)
- Natalie J Hicks
- Department of Health Sciences, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario, L2S 3A1, Canada
| | - Robert W E Crozier
- Department of Health Sciences, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario, L2S 3A1, Canada
| | - Adam J MacNeil
- Department of Health Sciences, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario, L2S 3A1, Canada
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24
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Chinnici A, Beneforti L, Pegoraro F, Trambusti I, Tondo A, Favre C, Coniglio ML, Sieni E. Approaching hemophagocytic lymphohistiocytosis. Front Immunol 2023; 14:1210041. [PMID: 37426667 PMCID: PMC10324660 DOI: 10.3389/fimmu.2023.1210041] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 06/08/2023] [Indexed: 07/11/2023] Open
Abstract
Hemophagocytic Lymphohistiocytosis (HLH) is a rare clinical condition characterized by sustained but ineffective immune system activation, leading to severe and systemic hyperinflammation. It may occur as a genetic or sporadic condition, often triggered by an infection. The multifaceted pathogenesis results in a wide range of non-specific signs and symptoms, hampering early recognition. Despite a great improvement in terms of survival in the last decades, a considerable proportion of patients with HLH still die from progressive disease. Thus, prompt diagnosis and treatment are crucial for survival. Faced with the complexity and the heterogeneity of syndrome, expert consultation is recommended to correctly interpret clinical, functional and genetic findings and address therapeutic decisions. Cytofluorimetric and genetic analysis should be performed in reference laboratories. Genetic analysis is mandatory to confirm familial hemophagocytic lymphohistiocytosis (FHL) and Next Generation Sequencing is increasingly adopted to extend the spectrum of genetic predisposition to HLH, though its results should be critically discussed with specialists. In this review, we critically revise the reported laboratory tools for the diagnosis of HLH, in order to outline a comprehensive and widely available workup that allows to reduce the time between the clinical suspicion of HLH and its final diagnosis.
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Affiliation(s)
- Aurora Chinnici
- Department of Neurosciences, Psychology, Drug Research and Child Health (NEUROFARBA), University of Florence, Florence, Italy
- Department of Pediatric Hematology Oncology, Meyer Children’s Hospital IRCCS, Florence, Italy
| | - Linda Beneforti
- Department of Neurosciences, Psychology, Drug Research and Child Health (NEUROFARBA), University of Florence, Florence, Italy
- Department of Pediatric Hematology Oncology, Meyer Children’s Hospital IRCCS, Florence, Italy
| | - Francesco Pegoraro
- Department of Pediatric Hematology Oncology, Meyer Children’s Hospital IRCCS, Florence, Italy
- Department of Health Sciences, University of Florence, Florence, Italy
| | - Irene Trambusti
- Department of Pediatric Hematology Oncology, Meyer Children’s Hospital IRCCS, Florence, Italy
| | - Annalisa Tondo
- Department of Pediatric Hematology Oncology, Meyer Children’s Hospital IRCCS, Florence, Italy
| | - Claudio Favre
- Department of Pediatric Hematology Oncology, Meyer Children’s Hospital IRCCS, Florence, Italy
| | - Maria Luisa Coniglio
- Department of Pediatric Hematology Oncology, Meyer Children’s Hospital IRCCS, Florence, Italy
| | - Elena Sieni
- Department of Pediatric Hematology Oncology, Meyer Children’s Hospital IRCCS, Florence, Italy
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25
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Wang Z, Zhao X, Zhou H, Che D, Du X, Ye D, Zeng W, Geng S. Activation of ryanodine-sensitive calcium store drives pseudo-allergic dermatitis via Mas-related G protein-coupled receptor X2 in mast cells. Front Immunol 2023; 14:1207249. [PMID: 37404822 PMCID: PMC10315577 DOI: 10.3389/fimmu.2023.1207249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 05/30/2023] [Indexed: 07/06/2023] Open
Abstract
Mast cell (MC) activation is implicated in the pathogenesis of multiple immunodysregulatory skin disorders. Activation of an IgE-independent pseudo-allergic route has been recently found to be mainly mediated via Mas-Related G protein-coupled receptor X2 (MRGPRX2). Ryanodine receptor (RYR) regulates intracellular calcium liberation. Calcium mobilization is critical in the regulation of MC functional programs. However, the role of RYR in MRGPRX2-mediated pseudo-allergic skin reaction has not been fully addressed. To study the role of RYR in vivo, we established a murine skin pseudo-allergic reaction model. RYR inhibitor attenuated MRGPRX2 ligand substance P (SP)-induced vascular permeability and neutrophil recruitment. Then, we confirmed the role of RYR in an MC line (LAD2 cells) and primary human skin-derived MCs. In LAD2 cells, RYR inhibitor pretreatment dampened MC degranulation (detected by β-hexosaminidase retlease), calcium mobilization, IL-13, TNF-α, CCL-1, CCL-2 mRNA, and protein expression activated by MRGPRX2 ligands, namely, compound 48/80 (c48/80) and SP. Moreover, the inhibition effect of c48/80 by RYR inhibitor was verified in skin MCs. After the confirmation of RYR2 and RYR3 expression, the isoforms were silenced by siRNA-mediated knockdown. MRGPRX2-induced LAD2 cell exocytosis and cytokine generation were substantially inhibited by RYR3 knockdown, while RYR2 had less contribution. Collectively, our finding suggests that RYR activation contributes to MRGPRX2-triggered pseudo-allergic dermatitis, and provides a potential approach for MRGPRX2-mediated disorders.
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Affiliation(s)
| | | | | | | | | | | | - Weihui Zeng
- *Correspondence: Songmei Geng, ; Weihui Zeng,
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26
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Yang BG, Kim AR, Lee D, An SB, Shim YA, Jang MH. Degranulation of Mast Cells as a Target for Drug Development. Cells 2023; 12:1506. [PMID: 37296626 PMCID: PMC10253146 DOI: 10.3390/cells12111506] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 05/26/2023] [Accepted: 05/28/2023] [Indexed: 06/12/2023] Open
Abstract
Mast cells act as key effector cells of inflammatory responses through degranulation. Mast cell degranulation is induced by the activation of cell surface receptors, such as FcεRI, MRGPRX2/B2, and P2RX7. Each receptor, except FcεRI, varies in its expression pattern depending on the tissue, which contributes to their differing involvement in inflammatory responses depending on the site of occurrence. Focusing on the mechanism of allergic inflammatory responses by mast cells, this review will describe newly identified mast cell receptors in terms of their involvement in degranulation induction and patterns of tissue-specific expression. In addition, new drugs targeting mast cell degranulation for the treatment of allergy-related diseases will be introduced.
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Affiliation(s)
- Bo-Gie Yang
- Research Institute, GI Biome Inc., Seongnam 13201, Republic of Korea; (A.-R.K.); (D.L.); (S.B.A.)
| | - A-Ram Kim
- Research Institute, GI Biome Inc., Seongnam 13201, Republic of Korea; (A.-R.K.); (D.L.); (S.B.A.)
| | - Dajeong Lee
- Research Institute, GI Biome Inc., Seongnam 13201, Republic of Korea; (A.-R.K.); (D.L.); (S.B.A.)
| | - Seong Beom An
- Research Institute, GI Biome Inc., Seongnam 13201, Republic of Korea; (A.-R.K.); (D.L.); (S.B.A.)
| | - Yaein Amy Shim
- Research Institute, GI Innovation Inc., Songpa-gu, Seoul 05855, Republic of Korea;
| | - Myoung Ho Jang
- Research Institute, GI Innovation Inc., Songpa-gu, Seoul 05855, Republic of Korea;
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27
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Ye X, Liu X, Luo X, Sun F, Qin C, Ding L, Zhu W, Zhang H, Zhou H, Chen Z. Characterization of the Molecular Diversity and Degranulation Activity of Mastoparan Family Peptides from Wasp Venoms. Toxins (Basel) 2023; 15:toxins15050331. [PMID: 37235365 DOI: 10.3390/toxins15050331] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 04/21/2023] [Accepted: 04/22/2023] [Indexed: 05/28/2023] Open
Abstract
Wasp stings have become an increasingly serious public health problem because of their high incidence and mortality rates in various countries and regions. Mastoparan family peptides are the most abundant natural peptides in hornet venoms and solitary wasp venom. However, there is a lack of systematic and comprehensive studies on mastoparan family peptides from wasp venoms. In our study, for the first time, we evaluated the molecular diversity of 55 wasp mastoparan family peptides from wasp venoms and divided them into four major subfamilies. Then, we established a wasp peptide library containing all 55 known mastoparan family peptides by chemical synthesis and C-terminal amidation modification, and we systematically evaluated their degranulation activities in two mast cell lines, namely the RBL-2H3 and P815 cell lines. The results showed that among the 55 mastoparans, 35 mastoparans could significantly induce mast cell degranulation, 7 mastoparans had modest mast cell degranulation activity, and 13 mastoparans had little mast cell degranulation activity, suggesting functional variation in mastoparan family peptides from wasp venoms. Structure-function relationship studies found that the composition of amino acids in the hydrophobic face and amidation in the C-terminal region are critical for the degranulation activity of mastoparan family peptides from wasp venoms. Our research will lay a theoretical foundation for studying the mechanism underlying the degranulation activity of wasp mastoparans and provide new evidence to support the molecular design and molecular optimization of natural mastoparan peptides from wasp venoms in the future.
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Affiliation(s)
- Xiangdong Ye
- Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, College of Basic Medicine, Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan 442000, China
- Hubei Key Laboratory of Wudang Local Chinese Medicine Research, Hubei University of Medicine, Shiyan 442000, China
| | - Xin Liu
- Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, College of Basic Medicine, Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan 442000, China
| | - Xudong Luo
- Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, College of Basic Medicine, Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan 442000, China
- Hubei Key Laboratory of Wudang Local Chinese Medicine Research, Hubei University of Medicine, Shiyan 442000, China
| | - Fang Sun
- Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, College of Basic Medicine, Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan 442000, China
- Hubei Key Laboratory of Wudang Local Chinese Medicine Research, Hubei University of Medicine, Shiyan 442000, China
| | - Chenhu Qin
- Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, College of Basic Medicine, Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan 442000, China
- Hubei Key Laboratory of Wudang Local Chinese Medicine Research, Hubei University of Medicine, Shiyan 442000, China
| | - Li Ding
- Department of Clinical Laboratory, Dongfeng Hospital, Hubei University of Medicine, Shiyan 442000, China
| | - Wen Zhu
- Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, College of Basic Medicine, Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan 442000, China
- Hubei Key Laboratory of Wudang Local Chinese Medicine Research, Hubei University of Medicine, Shiyan 442000, China
| | - Huajun Zhang
- Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, College of Basic Medicine, Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan 442000, China
| | - Haimei Zhou
- Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, College of Basic Medicine, Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan 442000, China
| | - Zongyun Chen
- Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, College of Basic Medicine, Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan 442000, China
- Hubei Key Laboratory of Wudang Local Chinese Medicine Research, Hubei University of Medicine, Shiyan 442000, China
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28
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Wakasugi-Onogi S, Ma S, Ruhee RT, Tong Y, Seki Y, Suzuki K. Sulforaphane Attenuates Neutrophil ROS Production, MPO Degranulation and Phagocytosis, but Does Not Affect NET Formation Ex Vivo and In Vitro. Int J Mol Sci 2023; 24:ijms24108479. [PMID: 37239829 DOI: 10.3390/ijms24108479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/01/2023] [Accepted: 05/06/2023] [Indexed: 05/28/2023] Open
Abstract
Sulforaphane has several effects on the human body, including anti-inflammation, antioxidation, antimicrobial and anti-obesity effects. In this study, we examined the effect of sulforaphane on several neutrophil functions: reactive oxygen species (ROS) production, degranulation, phagocytosis, and neutrophil extracellular trap (NET) formation. We also examined the direct antioxidant effect of sulforaphane. First, we measured neutrophil ROS production induced by zymosan in whole blood in the presence of 0 to 560 µM sulforaphane. Second, we examined the direct antioxidant activity of sulforaphane using a HOCl removal test. In addition, inflammation-related proteins, including an azurophilic granule component, were measured by collecting supernatants following ROS measurements. Finally, neutrophils were isolated from blood, and phagocytosis and NET formation were measured. Sulforaphane reduced neutrophil ROS production in a concentration-dependent manner. The ability of sulforaphane to remove HOCl is stronger than that of ascorbic acid. Sulforaphane at 280 µM significantly reduced the release of myeloperoxidase from azurophilic granules, as well as that of the inflammatory cytokines TNF-α and IL-6. Sulforaphane also suppressed phagocytosis but did not affect NET formation. These results suggest that sulforaphane attenuates neutrophil ROS production, degranulation, and phagocytosis, but does not affect NET formation. Moreover, sulforaphane directly removes ROS, including HOCl.
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Affiliation(s)
| | - Sihui Ma
- Health Nutrition, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Ruheea Taskin Ruhee
- Research Fellow of Japan Society for the Promotion of Sciences, Tokyo 102-0083, Japan
| | - Yishan Tong
- Graduate School of Sport Sciences, Waseda University, Tokorozawa 359-1192, Japan
| | - Yasuhiro Seki
- Graduate School of Sport Sciences, Waseda University, Tokorozawa 359-1192, Japan
| | - Katsuhiko Suzuki
- Faculty of Sport Sciences, Waseda University, Tokorozawa 359-1192, Japan
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29
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Baran J, Sobiepanek A, Mazurkiewicz-Pisarek A, Rogalska M, Gryciuk A, Kuryk L, Abraham SN, Staniszewska M. Mast Cells as a Target-A Comprehensive Review of Recent Therapeutic Approaches. Cells 2023; 12:cells12081187. [PMID: 37190096 DOI: 10.3390/cells12081187] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/04/2023] [Accepted: 04/16/2023] [Indexed: 05/17/2023] Open
Abstract
Mast cells (MCs) are the immune cells distributed throughout nearly all tissues, mainly in the skin, near blood vessels and lymph vessels, nerves, lungs, and the intestines. Although MCs are essential to the healthy immune response, their overactivity and pathological states can lead to numerous health hazards. The side effect of mast cell activity is usually caused by degranulation. It can be triggered by immunological factors, such as immunoglobulins, lymphocytes, or antigen-antibody complexes, and non-immune factors, such as radiation and pathogens. An intensive reaction of mast cells can even lead to anaphylaxis, one of the most life-threatening allergic reactions. What is more, mast cells play a role in the tumor microenvironment by modulating various events of tumor biology, such as cell proliferation and survival, angiogenesis, invasiveness, and metastasis. The mechanisms of the mast cell actions are still poorly understood, making it difficult to develop therapies for their pathological condition. This review focuses on the possible therapies targeting mast cell degranulation, anaphylaxis, and MC-derived tumors.
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Affiliation(s)
- Joanna Baran
- Centre for Advanced Materials and Technologies CEZAMAT, Warsaw University of Technology, 02-822 Warsaw, Poland
| | - Anna Sobiepanek
- Faculty of Chemistry, Warsaw University of Technology, 00-664 Warsaw, Poland
| | - Anna Mazurkiewicz-Pisarek
- Centre for Advanced Materials and Technologies CEZAMAT, Warsaw University of Technology, 02-822 Warsaw, Poland
| | - Marta Rogalska
- Centre for Advanced Materials and Technologies CEZAMAT, Warsaw University of Technology, 02-822 Warsaw, Poland
| | - Aleksander Gryciuk
- Centre for Advanced Materials and Technologies CEZAMAT, Warsaw University of Technology, 02-822 Warsaw, Poland
| | - Lukasz Kuryk
- Department of Virology, National Institute of Public Health NIH-NRI, 00-791 Warsaw, Poland
| | - Soman N Abraham
- Department of Pathology, Duke University Medical Center, Durham, NC 27710, USA
| | - Monika Staniszewska
- Centre for Advanced Materials and Technologies CEZAMAT, Warsaw University of Technology, 02-822 Warsaw, Poland
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30
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Oliver C. Commentary on Classic Article. J Histochem Cytochem 2023; 71:227-228. [PMID: 37016585 PMCID: PMC10149893 DOI: 10.1369/00221554231166740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 03/14/2023] [Indexed: 04/06/2023] Open
Affiliation(s)
- Constance Oliver
- Constance Oliver, Department of Cell and Molecular Biology and Pathogenic Bioagents, Ribeirão Preto Medical School, University of Sao Paulo, Avenida Bandeirantes 3900, Ribeirão Preto, Sao Paulo 14049-900, Brazil. E-mail:
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31
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Proaño-Pérez E, Ollé L, Guo Y, Aparicio C, Guerrero M, Muñoz-Cano R, Martin M. MITF Downregulation Induces Death in Human Mast Cell Leukemia Cells and Impairs IgE-Dependent Degranulation. Int J Mol Sci 2023; 24. [PMID: 36834926 DOI: 10.3390/ijms24043515] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/03/2023] [Accepted: 02/07/2023] [Indexed: 02/12/2023] Open
Abstract
Activating mutations in KIT (CD117) have been associated with several diseases, including gastrointestinal stromal tumors and mastocytosis. Rapidly progressing pathologies or drug resistance highlight the need for alternative treatment strategies. Previously, we reported that the adaptor molecule SH3 binding protein 2 (SH3BP2 or 3BP2) regulates KIT expression at the transcriptional level and microphthalmia-associated transcription factor (MITF) expression at the post-transcriptional level in human mast cells and gastrointestinal stromal tumor (GIST) cell lines. Lately, we have found that the SH3BP2 pathway regulates MITF through miR-1246 and miR-5100 in GIST. In this study, miR-1246 and miR-5100 were validated by qPCR in the SH3BP2-silenced human mast cell leukemia cell line (HMC-1). MiRNA overexpression reduces MITF and MITF-dependent target expression in HMC-1. The same pattern was observed after MITF silencing. In addition, MITF inhibitor ML329 treatment reduces MITF expression and affects the viability and cell cycle progression in HMC-1. We also examine whether MITF downregulation affected IgE-dependent mast cell degranulation. MiRNA overexpression, MITF silencing, and ML329 treatment reduced IgE-dependent degranulation in LAD2- and CD34+-derived mast cells. These findings suggest MITF may be a potential therapeutic target for allergic reactions and deregulated KIT mast-cell-mediated disorders.
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Guo Y, Negre J, Eitzen G. GEF-H1 Transduces FcεRI Signaling in Mast Cells to Activate RhoA and Focal Adhesion Formation during Exocytosis. Cells 2023; 12. [PMID: 36831204 DOI: 10.3390/cells12040537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 02/01/2023] [Accepted: 02/03/2023] [Indexed: 02/11/2023] Open
Abstract
When antigen-stimulated, mast cells release preformed inflammatory mediators stored in cytoplasmic granules. This occurs via a robust exocytosis mechanism termed degranulation. Our previous studies revealed that RhoA and Rac1 are activated during mast cell antigen stimulation and are required for mediator release. Here, we show that the RhoGEF, GEF-H1, acts as a signal transducer of antigen stimulation to activate RhoA and promote mast cell spreading via focal adhesion (FA) formation. Cell spreading, granule movement, and exocytosis were all reduced in antigen-stimulated mast cells when GEF-H1 was depleted by RNA interference. GEF-H1-depleted cells also showed a significant reduction in RhoA activation, resulting in reduced stress fiber formation without altering lamellipodia formation. Ectopic expression of a constitutively active RhoA mutant restored normal morphology in GEF-H1-depleted cells. FA formation during antigen stimulation required GEF-H1, suggesting it is a downstream target of the GEF-H1-RhoA signaling axis. GEF-H1 was activated by phosphorylation in conjunction with antigen stimulation. Syk kinase is linked to the FcεRI signaling pathway and the Syk inhibitor, GS-9973, blocked GEF-H1 activation and also suppressed cell spreading, granule movement, and exocytosis. We concluded that during FcεRI receptor stimulation, GEF-H1 transmits signals to RhoA activation and FA formation to facilitate the exocytosis mechanism.
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33
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Reiff DD, Zhang M, Cron RQ. DOCK2 Mutation and Recurrent Hemophagocytic Lymphohistiocytosis. Life (Basel) 2023; 13. [PMID: 36836791 DOI: 10.3390/life13020434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/23/2023] [Accepted: 01/31/2023] [Indexed: 02/05/2023] Open
Abstract
Hemophagocytic lymphohistiocytosis (HLH) is a syndrome resulting from uncontrolled hyper-inflammation, excessive immune system activation, and elevated levels of inflammatory cytokines. HLH can be caused by the inability to downregulate activated macrophages by natural killer (NK) and CD8 cytotoxic T cells through a process reliant on perforin and granzyme B to initiate apoptosis. Homozygous genetic mutations in this process result in primary HLH (pHLH), a disorder that can lead to multi-system organ failure and death in infancy. Heterozygous, dominant-negative, or monoallelic hypomorphic mutations in these same genes can cause a similar syndrome in the presence of an immune trigger, leading to secondary HLH (sHLH). A genetic mutation in a potential novel HLH-associated gene, dedicator of cytokinesis 2 (DOCK2), was identified in a patient with recurrent episodes of sHLH and hyperinflammation in the setting of frequent central line infections. He required baseline immune suppression for the prevention of sHLH, with increased anti-cytokine therapies and corticosteroids in response to flares and infections. Using a foamy-virus approach, the patient's DOCK2 mutation and wild-type (WT) control DOCK2 cDNA were separately transduced into a human NK-92 cell line. The NK-cell populations were stimulated with NK-sensitive K562 erythroleukemia target cells in vitro and degranulation and cytolysis were measured using CD107a expression and live/dead fixable cell dead reagent, respectively. Compared to WT, the patient's DOCK2 mutation was found to cause significantly decreased NK cell function, degranulation, and cytotoxicity. This study speaks to the importance of DOCK2 and similar genes in the pathogenesis of sHLH, with implications for its diagnosis and treatment.
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Kataoka H, Tanaka K, Tazuya-Murayama K, Yamashita T, Nishikawa JI. [Effects of Coarse and Fine Atmospheric Particulate Matter on a Mast Cell Line]. YAKUGAKU ZASSHI 2023; 143:159-170. [PMID: 36724929 DOI: 10.1248/yakushi.22-00168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We investigated the cytotoxicity on a mast cell line (C57 cells) of water-soluble extracts of coarse (>3 µm, PM>3) and fine (0.05-3 µm, PM0.05-3) atmospheric particulates collected from April 2016 to March 2019 in Fukuoka, Japan. We examined the direct cytotoxicity with punched-out membrane filter fragments of PM>3 and PM0.05-3 collected from April 2019 to March 2021, without extraction of the components. Also, cell proliferation and degranulation assays were conducted under conditions which caused no cytotoxicity with water-soluble extracts of PM>3 from FY2016 and PM>3 direct samples from FY2019. The findings revealed the significant direct cytotoxicity of many PM>3 and all PM0.05-3 samples, with higher cytotoxicity for PM0.05-3 (FY2019-2020). These results were different from the cytotoxicity effects of water-soluble extracts of PM>3 and PM0.05-3 samples (FY2016) in previous studies. In addition, inhibition of cell proliferation and induction of degranulation were significantly induced in a few PM>3 samples, showing a correlation with the suspended particulate matter (SPM) concentrations. This method using punched-out membrane filters is convenient and useful for assessing the direct effects of atmospheric particles on a small scale.
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Affiliation(s)
- Hiromi Kataoka
- Hygiene Chemistry Laboratory, Department of Pharmacy, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University
| | - Kaori Tanaka
- Hygiene Chemistry Laboratory, Department of Pharmacy, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University
| | | | - Taku Yamashita
- Hygiene Chemistry Laboratory, Department of Pharmacy, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University
| | - Jun-Ichi Nishikawa
- Hygiene Chemistry Laboratory, Department of Pharmacy, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University
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Sawane K, Nagatake T, Hosomi K, Kunisawa J. Anti-allergic property of dietary phytoestrogen secoisolariciresinol diglucoside through microbial and β-glucuronidase-mediated metabolism. J Nutr Biochem 2023; 112:109219. [PMID: 36375731 DOI: 10.1016/j.jnutbio.2022.109219] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 04/03/2022] [Accepted: 09/27/2022] [Indexed: 11/13/2022]
Abstract
Phytoestrogens play pivotal roles in controlling not only the endocrine system but also inflammatory metabolic disorders. However, the effects of dietary phytoestrogens on allergic diseases and underlying mechanisms remain unclear. In this study, we revealed the unique metabolic conversion of phytoestrogen to exert anti-allergic properties, using an ovalbumin-induced allergic rhinitis mouse model. We found that dietary secoisolariciresinol diglucoside (SDG), a phytoestrogen abundantly present in flaxseed, alleviated allergic rhinitis by the microbial conversion to enterodiol (ED). We also found that ED circulated mainly in the glucuronide form (EDGlu) in blood, and deconjugation of EDGlu to ED aglycone occurred in the nasal passage; this activity was enhanced after the induction of allergic rhinitis, which was mediated by β-glucuronidase. We further found that IgE-mediated degranulation was inhibited by ED aglycone, but not by EDGlu, in a G protein-coupled receptor 30 (GPR30)-dependent manner. These results provide new insights into the anti-allergic properties of phytoestrogens and their metabolism in vivo for the development of novel therapeutic strategies against allergic rhinitis.
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Affiliation(s)
- Kento Sawane
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Osaka, Japan; Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Takahiro Nagatake
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Osaka, Japan; Laboratory of Functional Anatomy, Department of Life Sciences, School of Agriculture, Meiji University, Kanagawa, Japan; Laboratory of Gut Environmental System, Collaborative Research Center for Health and Medicine, NIBIOHN
| | - Koji Hosomi
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Osaka, Japan; Laboratory of Gut Environmental System, Collaborative Research Center for Health and Medicine, NIBIOHN
| | - Jun Kunisawa
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Osaka, Japan; Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan; Laboratory of Gut Environmental System, Collaborative Research Center for Health and Medicine, NIBIOHN; Graduate School of Medicine, Graduate School of Science and Graduate School of Dentistry, Osaka University, Osaka, Japan; Division of Mucosal Immunology, Department of Microbiology and Immunology and International Research and Development Center for Mucosal Vaccines, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.
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36
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Crozier RWE, Yousef M, Coish JM, Fajardo VA, Tsiani E, MacNeil AJ. Carnosic acid inhibits secretion of allergic inflammatory mediators in IgE-activated mast cells via direct regulation of Syk activation. J Biol Chem 2023; 299:102867. [PMID: 36608933 PMCID: PMC10068559 DOI: 10.1016/j.jbc.2022.102867] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 12/22/2022] [Accepted: 12/29/2022] [Indexed: 01/09/2023] Open
Abstract
Mast cells are essential regulators of inflammation most recognized for their central role in allergic inflammatory disorders. Signaling via the high-affinity immunoglobulin E (IgE) receptor, FcεRI, leads to rapid degranulation of preformed granules and the sustained release of newly-synthesized pro-inflammatory mediators. Our group recently established rosemary extract (RE) as a potent regulator of mast cell functions, attenuating MAPK and NF-κB signaling. Carnosic acid (CA)-a major polyphenolic constituent of RE-has been shown to exhibit anti-inflammatory effects in other immune cell models, but its role as a potential modulator of mast cell activation is undefined. Therefore, we sought here to determine the modulatory effects of CA in a mast cell model of allergic inflammation. We sensitized bone marrow-derived mast cells (BMMCs) with anti-trinitrophenyl (TNP) IgE and activated with allergen (TNP-BSA) under stem cell factor (SCF) potentiation, in addition to treatment with CA. Our results indicate that CA significantly inhibits allergen-induced early phase responses including Ca2+ mobilization, ROS production, and subsequent degranulation. We also show CA treatment reduced late phase responses, including the release of all cytokines and chemokines examined following IgE stimulation, and corresponding gene expression excepting that of CCL2. Importantly, we determined that CA mediates its inhibitory effects through modulation of tyrosine kinase Syk and downstream effectors TAK1 (Ser412) and Akt (Ser473) as well as NF-κB signaling, while phosphorylation of FcεRI (γ chain) and MAPK proteins remained unaltered. These novel findings establish CA as a potent modulator of mast cell activation, warranting further investigation as a putative anti-allergy therapeutic.
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Affiliation(s)
- Robert W E Crozier
- Department of Health Sciences, Brock University, St Catharines, Ontario, L2S 3A1, Canada
| | - Michael Yousef
- Department of Health Sciences, Brock University, St Catharines, Ontario, L2S 3A1, Canada
| | - Jeremia M Coish
- Department of Health Sciences, Brock University, St Catharines, Ontario, L2S 3A1, Canada
| | - Val A Fajardo
- Department of Kinesiology, Brock University, St Catharines, Ontario, L2S 3A1, Canada
| | - Evangelia Tsiani
- Department of Health Sciences, Brock University, St Catharines, Ontario, L2S 3A1, Canada
| | - Adam J MacNeil
- Department of Health Sciences, Brock University, St Catharines, Ontario, L2S 3A1, Canada.
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37
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Makwana P, Hungund SP, Pradeep ANR. Dipteran endoparasitoid Exorista bombycis utilizes antihemocyte components against host defense of silkworm Bombyx mori. Arch Insect Biochem Physiol 2023; 112:e21976. [PMID: 36205611 DOI: 10.1002/arch.21976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/07/2022] [Accepted: 09/17/2022] [Indexed: 06/16/2023]
Abstract
Dipteran endoparasitoids avoid host immune response; however, antidefense components from the Dipterans are unknown. Infestation of commercial silkworm Bombyx mori Linnaeus (Lepidoptera: Bombycidae) by endoparasitoid Exorista bombycis Louis (Diptera: Tachinidae) induced immune reactions, cytotoxicity, granulation, degranulation, and augmented release of cytotoxic marker enzyme lactate dehydrogenase (LDH), and degranulation-mediator enzyme β-hexosaminidase in hemocytes. In this study, by reverse phase high-performance liquid chromatography, fractions of E. bombycis larval tissue protein with antihemocytic activity are separated. From the fraction, peptides of hemocyte aggregation inhibitor protein (HAIP) and pyridoxamine phosphate oxidase (PNPO) are identified by mass spectrometry. Interacting partners of HAIP and PNPO are retrieved that further enhance the virulence of the parasitoid. PNPO and HAIP genes showed a four- to seven fold increase in expression in the integument of the parasitoid larva. Together, the dipteran endoparasitoid E. bombycis exploit antihemocyte activity to inhibit host defense reactions in addition to defense evasion contemplated.
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Affiliation(s)
- Pooja Makwana
- Seribiotech Research Laboratory, CSB-Kodathi Campus, Bangalore, Karnataka, India
- Biotechnology Division, Central Sericultural Research & Training Institute, Berhampore, West Bengal, India
| | - Shambhavi P Hungund
- Seribiotech Research Laboratory, CSB-Kodathi Campus, Bangalore, Karnataka, India
| | - Appukuttan Nair R Pradeep
- Seribiotech Research Laboratory, CSB-Kodathi Campus, Bangalore, Karnataka, India
- Biotechnology Division, Central Sericultural Research & Training Institute, Berhampore, West Bengal, India
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38
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Yoshii M, Kitazaki A, Ozawa K. Effects of Simvastatin on RBL-2H3 Cell Degranulation. Biol Pharm Bull 2023; 46:874-882. [PMID: 37394638 DOI: 10.1248/bpb.b22-00591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Hypercholesterolemia is a major complication of arteriosclerosis. Mast cells in arteriosclerosis plaques induce inflammatory reactions and promote arterial sclerosis. In this study, we evaluated the pharmacological effects of simvastatin (SV)-3-hydroxy-3-methylglutaryl-CoA (HMG-CoA) reductase inhibitors on the degranulation of rat basophilic leukemia (RBL)-2H3 cells, which are commonly used as mast cell models. SV significantly decreased the degranulation induced by three types of stimulation: antigen antibody reaction (Ag-Ab), thapsigargin (Tg) serosal endoplasmic reticulum calcium ATPase (SERCA) inhibitor, and A23187 calcium ionophore. SV had a stronger inhibitory effect on degranulation induced by Ag-Ab stimulation than the other two stimulations. However, SV did not inhibit increase of intracellular Ca2+ concentrations. Mevalonate or geranylgeraniol co-treatment with SV completely prevented the inhibitory effect of SV on the degranulation induced by these stimulations. Immunoblotting results showed that SV inhibited protein kinase C (PKC) delta translocation induced by Ag-Ab but not by Tg or A23187. SV induced a reduction in active Rac1, and actin filament rearrangement. In conclusion, SV inhibits RBL-2H3 cell degranulation by inhibiting downstream signaling pathways, including the sequential degranulation pathway. These inhibitory effects were completely reversed by the addition of geranylgeraniol and might be induced by changes in the translocation of the small guanosine 5'-triphosphatase (GTPase) families Rab and Rho, which are related to vesicular transport PKC delta translocation and actin filament formation, respectively. These changes are caused by the inhibition of HMG-CoA reductase by SV following the synthesis of geranylgeranyl pyrophosphates, which play important roles in the activation of small GTPases, Rab.
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Affiliation(s)
- Michiko Yoshii
- Department of Pharmacotherapy, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Ai Kitazaki
- School of Pharmaceutical Sciences, Hiroshima University
| | - Koichiro Ozawa
- Department of Pharmacotherapy, Graduate School of Biomedical and Health Sciences, Hiroshima University
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39
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Makarov MS, Storozheva MV. Regulation of Human Platelet Adhesion with Ascorbic Acid. Bull Exp Biol Med 2022; 174:280-282. [PMID: 36598667 DOI: 10.1007/s10517-023-05690-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Indexed: 01/05/2023]
Abstract
Morphofunctional characteristics of human platelets in the presence of 0.1-5 mM ascorbic acid were studied. The platelet ability to form lamellae and the preservation of granules in platelets in suspension and during adhesion were evaluated. Ascorbic acid in concentrations of 0.1-1 mM induced no visible changes in platelet structure and did not affect their adhesion activity, but suppressed lamella growth and degranulation in adherent platelets in a dose-dependent manner. The maximum preservation of granules was revealed in the presence of 0.5 mM ascorbic acid (55% in 1 h from the moment of adhesion). In the presence of 2-5 mM ascorbic acid, spontaneous activation and degranulation of platelets was observed. Thus, ascorbic acid is capable of both suppressing and stimulating platelet activity. In concentrations of 0.5-1 mM ascorbic acid can be used to stabilize granules in adherent platelets.
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Affiliation(s)
- M S Makarov
- N. V. Sklifosovsky Research Institute of Emergency Medicine, Moscow Health Department, Moscow, Russia.
| | - M V Storozheva
- N. V. Sklifosovsky Research Institute of Emergency Medicine, Moscow Health Department, Moscow, Russia
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40
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Maskarinec SA, McKelvy M, Boyle K, Hotchkiss H, Duarte ME, Addison B, Amato N, Khandelwal S, Arepally GM, Lee GM. Neutrophil functional heterogeneity is a fixed phenotype and is associated with distinct gene expression profiles. J Leukoc Biol 2022; 112:1485-1495. [PMID: 35916035 PMCID: PMC9701148 DOI: 10.1002/jlb.4a0322-164r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 06/30/2022] [Accepted: 07/18/2022] [Indexed: 01/04/2023] Open
Abstract
Differences in the ability of neutrophils to perform relevant effector functions has been identified in a variety of disease states. Although neutrophil functional heterogeneity is increasingly recognized during disease, few studies have examined neutrophil functional heterogeneity during periods of health. In this study, we systematically characterize neutrophil functional heterogeneity in a cohort of healthy human subjects using a range of biologically relevant agonists including immune complexes, bacterial ligands, and pathogens. With repeated testing over several years, we show that neutrophil functional capability represents a fixed phenotype for each individual. This neutrophil phenotype is preserved across a range of agonists and extends to a variety of effector functions including degranulation, neutrophil extracellular trap release, reactive oxygen species generation, phagocytosis, and bacterial killing. Using well-phenotyped healthy human subjects, we demonstrate that neutrophil functional heterogeneity is characterized by differences in neutrophil gene expression patterns. Altogether, our findings demonstrate that while neutrophil function is highly heterogeneous among healthy subjects, each individual's functional capability represents a fixed phenotype defined by a distinct neutrophil gene expression profile. These findings may be relevant during disease states where the ability to perform relevant neutrophil effector functions may impact disease course and/or clinical outcome.
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Affiliation(s)
| | - Margaret McKelvy
- Division of Hematology, Duke University Medical Center, Durham, NC
| | - Kimberly Boyle
- Division of Hematology, Duke University Medical Center, Durham, NC
| | - Halie Hotchkiss
- Division of Infectious Diseases, Duke University Medical Center, Durham, NC
| | | | - Bechtler Addison
- Division of Infectious Diseases, Duke University Medical Center, Durham, NC
| | - Nicholas Amato
- Division of Hematology, Duke University Medical Center, Durham, NC
| | | | | | - Grace M. Lee
- Division of Hematology, Duke University Medical Center, Durham, NC
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41
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Wu S, Zhang R, Liu Y, Gao J, Wu Y, Tu C, Chen H, Yuan J. In Vitro Effect of Flavonoids on Basophils Degranulation and Intestinal Epithelial Barrier Damage Induced by ω-5 Gliadin-Derived Peptide. Foods 2022; 11. [PMID: 36496664 DOI: 10.3390/foods11233857] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 11/23/2022] [Accepted: 11/26/2022] [Indexed: 12/02/2022] Open
Abstract
Flavonoids have antioxidant, anti-inflammatory and immunomodulatory properties, and may alleviate food allergic reactions and intestinal inflammation induced by ω-5 gliadin, a main allergen of wheat food allergy in children. In this study, a human basophil KU812 cell degranulation model and a Caco-2 monolayer cell model were constructed in vitro to evaluate the effects of four flavonoids on the allergenicity of ω-5 gliadin peptides and ω-5 gliadin peptide-induced barrier damage in Caco-2 intestinal epithelial monolayers. The results show that baicalein, luteolin, isorhamnetin and naringenin can significantly inhibit the degranulation of KU812 cells stimulated by ω-5 gliadin-derived peptide P4 and the release of IL-6 and TNF-α. In addition, the four flavonoids significantly inhibited the ω-5 gliadin-derived peptide P4 to induce the release of IL-6, IL-8 in Caco-2 cells, inhibited the release of zonulin, and significantly increase the expression of tight junction proteins Occludin and ZO-1 in the Caco-2 cell monolayer. In conclusion, baicalein, luteolin, isorhamnetin and naringenin inhibit degranulation stimulated by wheat allergen and enhance intestinal barrier functions, which supports the potential pharmaceutical application of the four flavonoids treatment for wheat food allergy.
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LaSalle TJ, Gonye ALK, Freeman SS, Kaplonek P, Gushterova I, Kays KR, Manakongtreecheep K, Tantivit J, Rojas-Lopez M, Russo BC, Sharma N, Thomas MF, Lavin-Parsons KM, Lilly BM, Mckaig BN, Charland NC, Khanna HK, Lodenstein CL, Margolin JD, Blaum EM, Lirofonis PB, Revach OY, Mehta A, Sonny A, Bhattacharyya RP, Parry BA, Goldberg MB, Alter G, Filbin MR, Villani AC, Hacohen N, Sade-Feldman M. Longitudinal characterization of circulating neutrophils uncovers phenotypes associated with severity in hospitalized COVID-19 patients. Cell Rep Med 2022; 3:100779. [PMID: 36208629 PMCID: PMC9510054 DOI: 10.1016/j.xcrm.2022.100779] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 08/02/2022] [Accepted: 09/21/2022] [Indexed: 01/21/2023]
Abstract
Mechanisms of neutrophil involvement in severe coronavirus disease 2019 (COVID-19) remain incompletely understood. Here, we collect longitudinal blood samples from 306 hospitalized COVID-19+ patients and 86 controls and perform bulk RNA sequencing of enriched neutrophils, plasma proteomics, and high-throughput antibody profiling to investigate relationships between neutrophil states and disease severity. We identify dynamic switches between six distinct neutrophil subtypes. At days 3 and 7 post-hospitalization, patients with severe disease display a granulocytic myeloid-derived suppressor cell-like gene expression signature, while patients with resolving disease show a neutrophil progenitor-like signature. Humoral responses are identified as potential drivers of neutrophil effector functions, with elevated severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-specific immunoglobulin G1 (IgG1)-to-IgA1 ratios in plasma of severe patients who survived. In vitro experiments confirm that while patient-derived IgG antibodies induce phagocytosis in healthy donor neutrophils, IgA antibodies predominantly induce neutrophil cell death. Overall, our study demonstrates a dysregulated myelopoietic response in severe COVID-19 and a potential role for IgA-dominant responses contributing to mortality.
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Affiliation(s)
- Thomas J LaSalle
- Center for Cancer Research, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA; Program in Health Sciences and Technology, Harvard Medical School & Massachusetts Institute of Technology, Boston, MA, USA.
| | - Anna L K Gonye
- Center for Cancer Research, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Samuel S Freeman
- Center for Cancer Research, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA; Department of Biomedical Informatics, Harvard Medical School, Boston, MA, USA
| | | | - Irena Gushterova
- Center for Cancer Research, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Kyle R Kays
- Department of Emergency Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Kasidet Manakongtreecheep
- Center for Cancer Research, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA; Center for Immunology and Inflammatory Diseases, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Jessica Tantivit
- Center for Cancer Research, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA; Center for Immunology and Inflammatory Diseases, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Maricarmen Rojas-Lopez
- Department of Medicine, Harvard Medical School, Boston, MA, USA; Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Department of Microbiology, Harvard Medical School, Boston, MA, USA
| | - Brian C Russo
- Department of Medicine, Harvard Medical School, Boston, MA, USA; Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Department of Microbiology, Harvard Medical School, Boston, MA, USA
| | - Nihaarika Sharma
- Center for Cancer Research, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Molly F Thomas
- Center for Cancer Research, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA; Center for Immunology and Inflammatory Diseases, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Department of Medicine, Harvard Medical School, Boston, MA, USA; Department of Gastroenterology, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA
| | | | - Brendan M Lilly
- Department of Emergency Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Brenna N Mckaig
- Department of Emergency Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Nicole C Charland
- Department of Emergency Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Hargun K Khanna
- Department of Emergency Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Carl L Lodenstein
- Department of Emergency Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Justin D Margolin
- Department of Emergency Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Emily M Blaum
- Center for Cancer Research, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Paola B Lirofonis
- Center for Cancer Research, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Or-Yam Revach
- Center for Cancer Research, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Arnav Mehta
- Center for Cancer Research, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA; Department of Medicine, Harvard Medical School, Boston, MA, USA; Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Abraham Sonny
- Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Roby P Bhattacharyya
- Broad Institute of MIT and Harvard, Cambridge, MA, USA; Department of Medicine, Harvard Medical School, Boston, MA, USA; Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Blair Alden Parry
- Department of Emergency Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Marcia B Goldberg
- Broad Institute of MIT and Harvard, Cambridge, MA, USA; Department of Medicine, Harvard Medical School, Boston, MA, USA; Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Department of Microbiology, Harvard Medical School, Boston, MA, USA; Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Galit Alter
- Ragon Institute of MGH, MIT and Harvard, Cambridge, MA, USA
| | - Michael R Filbin
- Broad Institute of MIT and Harvard, Cambridge, MA, USA; Department of Emergency Medicine, Massachusetts General Hospital, Boston, MA, USA; Department of Emergency Medicine, Harvard Medical School, Boston, MA, USA
| | - Alexandra-Chloé Villani
- Center for Cancer Research, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA; Center for Immunology and Inflammatory Diseases, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Nir Hacohen
- Center for Cancer Research, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA; Department of Medicine, Harvard Medical School, Boston, MA, USA.
| | - Moshe Sade-Feldman
- Center for Cancer Research, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA; Department of Medicine, Harvard Medical School, Boston, MA, USA.
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43
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Alam SB, Wagner A, Willows S, Kulka M. Quercetin and Resveratrol Differentially Decrease Expression of the High-Affinity IgE Receptor (FcεRI) by Human and Mouse Mast Cells. Molecules 2022; 27:molecules27196704. [PMID: 36235240 PMCID: PMC9573482 DOI: 10.3390/molecules27196704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 09/24/2022] [Accepted: 09/28/2022] [Indexed: 11/05/2022]
Abstract
Mast cells (MC) synthesize and store proinflammatory mediators and are centrally important in atopic diseases such as asthma and atopic dermatitis. Quercetin a and resveratrol are plant derived polyphenolic compounds with anti-inflammatory properties that inhibit MC degranulation and mediator release. However, the underlying mechanism of these inhibitory effects on MC is poorly understood and it is unclear whether this is a general effect on all MC phenotypes. We have characterized and compared the effects of quercetin with resveratrol on human (LAD2) and mouse (MC/9 and BMMC) MC mediator release, receptor expression and FcεRI signaling to better understand the mechanisms involved in quercetin and resveratrol-mediated inhibition of MC activation. Quercetin significantly decreased the expression of FcεRI by BMMC and MC/9, although the effects on MC/9 were associated with a significant reduction in cell viability. Quercetin also inhibited antigen-stimulated TNF release by BMMC. Although neither quercetin nor resveratrol significantly altered antigen-stimulated BMMC degranulation or downstream signaling events such as phosphorylation of spleen tyrosine kinase (SYK) or extracellular signal-regulated kinase 1/2 (ERK), resveratrol inhibited ERK phosphorylation and FcεRI- stimulated degranulation in LAD2. Our data suggests that quercetin and resveratrol inhibit human and mouse MC differentially and that these effects are associated with modification of FcεRI expression, signaling (phosphorylation of SYK and ERK) and mediator release.
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Affiliation(s)
- Syed Benazir Alam
- Nanotechnology Research Center, National Research Council, Edmonton, AB T6G 2M9, Canada
- Correspondence:
| | - Ashley Wagner
- Nanotechnology Research Center, National Research Council, Edmonton, AB T6G 2M9, Canada
| | - Steven Willows
- Nanotechnology Research Center, National Research Council, Edmonton, AB T6G 2M9, Canada
| | - Marianna Kulka
- Nanotechnology Research Center, National Research Council, Edmonton, AB T6G 2M9, Canada
- Medical Microbiology and Immunology, University of Alberta, Edmonton, AB T6G 2E1, Canada
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Buttgereit T, Pfeiffenberger M, Frischbutter S, Krauß PL, Chen Y, Maurer M, Buttgereit F, Gaber T. Inhibition of Complex I of the Respiratory Chain, but Not Complex III, Attenuates Degranulation and Cytokine Secretion in Human Skin Mast Cells. Int J Mol Sci 2022; 23:11591. [PMID: 36232895 DOI: 10.3390/ijms231911591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/23/2022] [Accepted: 09/26/2022] [Indexed: 11/07/2022] Open
Abstract
The mechanisms of mast cell (MC) degranulation and MC-driven skin symptoms are well-described. In contrast, data about the role of mitochondrial respiration for immune functions of human skin MCs are lacking. Oxygen consumption rate (OCR) in primary human skin MCs during IgE-mediated activation in the absence of glucose was examined using a metabolic flux analyzer. Effects of the inhibition of mitochondrial complex I (by rotenone A) and III (by myxothiazol) on degranulation and cytokine secretion (IL-4, IL-5, IL-6, IL-13, TNF-α, and GM-CSF) were explored by the β-hexosaminidase release assay and multiplex ELISA. IgE-mediated activation rapidly increased the mitochondrial OCR and extracellular acidification; the contribution of non-mitochondrial oxygen consumption remained unchanged at lower levels. Both myxothiazol and rotenone A reduced OCR, the mitochondrial parameters, and extracellular acidification; however, myxothiazol did not affect degranulation and cytokine secretion. In contrast, degranulation and the secretion of IL-6, IL-13, TNF-α, and GM-CSF were reduced by rotenone A, whereas the secretion of IL-4 and IL-5 was not significantly affected. The inhibitors did not affect cell viability. Our results highlight the important role played by mitochondrial respiration in primary human skin MCs and allow for a conclusion on a hierarchy of their effector functions. Drugs targeting specific pathways in mitochondria may provide future options to control MC-driven skin symptoms.
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Abstract
Mast cells are evolutionarily old cells and the principal effectors in allergic responses and inflammation. They are seeded from the yolk sac during embryogenesis or are derived from hematopoietic progenitors and are therefore related to other leukocyte subsets, even though they form a separate clade in the hematopoietic system. Herein, we systematically bundle information from several recent high-throughput endeavors, especially those comparing MCs with other cell types, and combine such information with knowledge on the genes’ functions to reveal groups of neuronal markers specifically expressed by MCs. We focus on recent advances made regarding human tissue MCs, but also refer to studies in mice. In broad terms, genes hyper-expressed in MCs, but largely inactive in other myelocytes, can be classified into subcategories such as traffic/lysosomes (MLPH and RAB27B), the dopamine system (MAOB, DRD2, SLC6A3, and SLC18A2), Ca2+-related entities (CALB2), adhesion molecules (L1CAM and NTM) and, as an overall principle, the transcription factors and modulators of transcriptional activity (LMO4, PBX1, MEIS2, and EHMT2). Their function in MCs is generally unknown but may tentatively be deduced by comparison with other systems. MCs share functions with the nervous system, as they express typical neurotransmitters (histamine and serotonin) and a degranulation machinery that shares features with the neuronal apparatus at the synapse. Therefore, selective overlaps are plausible, and they further highlight the uniqueness of MCs within the myeloid system, as well as when compared with basophils. Apart from investigating their functional implications in MCs, a key question is whether their expression in the lineage is due to the specific reactivation of genes normally silenced in leukocytes or whether the genes are not switched off during mastocytic development from early progenitors.
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Affiliation(s)
- Magda Babina
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Immunology and Allergology IA, 12203 Berlin, Germany
- Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt Universität zu Berlin, Institute of Allergology, Hindenburgdamm 30, 12203 Berlin, Germany
- Correspondence:
| | - Kristin Franke
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Immunology and Allergology IA, 12203 Berlin, Germany
- Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt Universität zu Berlin, Institute of Allergology, Hindenburgdamm 30, 12203 Berlin, Germany
| | - Gürkan Bal
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Immunology and Allergology IA, 12203 Berlin, Germany
- Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt Universität zu Berlin, Institute of Allergology, Hindenburgdamm 30, 12203 Berlin, Germany
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Bong SK, Park NJ, Lee SH, Lee JW, Kim AT, Liu X, Kim SM, Yang MH, Kim YK, Kim SN. Trifuhalol A Suppresses Allergic Inflammation through Dual Inhibition of TAK1 and MK2 Mediated by IgE and IL-33. Int J Mol Sci 2022; 23:ijms231710163. [PMID: 36077570 PMCID: PMC9456157 DOI: 10.3390/ijms231710163] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 08/30/2022] [Accepted: 09/01/2022] [Indexed: 11/16/2022] Open
Abstract
The activation and degranulation of immune cells play a pivotal role in allergic inflammation, a pathological condition that includes anaphylaxis, pruritus, and allergic march-related diseases. In this study, trifuhalol A, a phlorotannin isolated from Agarum cribrosum, inhibited the degranulation of immune cells and the biosynthesis of IL-33 and IgE in differentiated B cells and keratinocytes, respectively. Additionally, trifuhalol A suppressed the IL-33 and IgE-mediated activation of RBL-2H3 cells through the regulation of the TAK1 and MK2 pathways. Hence, the effect of trifuhalol A on allergic inflammation was evaluated using a Compound 48/80-induced systemic anaphylaxis mouse model and a house dust mite (HDM)-induced atopic dermatitis (AD) mouse model. Trifuhalol A alleviated anaphylactic death and pruritus, which appeared as an early-phase reaction to allergic inflammation in the Compound 48/80-induced systemic anaphylaxis model. In addition, trifuhalol A improved symptoms such as itching, edema, erythema, and hyperkeratinization in HDM-induced AD mice as a late-phase reaction. Moreover, the expression of IL-33 and thymic stromal lymphopoietin, inflammatory cytokines secreted from activated keratinocytes, was significantly reduced by trifuhalol A administration, resulting in the reduced infiltration of immune cells into the skin and a reduction in the blood levels of IgE and IL-4. In summarizing the above results, these results confirm that trifuhalol A is a potential therapeutic candidate for the regulation of allergic inflammation.
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Affiliation(s)
- Sim-Kyu Bong
- Natural Products Research Institute, Korea Institute of Sceience and Technology (KIST), Gangneung 25451, Korea
| | - No-June Park
- Natural Products Research Institute, Korea Institute of Sceience and Technology (KIST), Gangneung 25451, Korea
- Division of Bio-Medical Science and Technology, KIST School, University of Science and Technology, Seoul 02792, Korea
| | - Sang Heon Lee
- Natural Products Research Institute, Korea Institute of Sceience and Technology (KIST), Gangneung 25451, Korea
| | - Jin Woo Lee
- Natural Products Research Institute, Korea Institute of Sceience and Technology (KIST), Gangneung 25451, Korea
| | - Aaron Taehwan Kim
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA
| | - Xiaoyong Liu
- Haizhibao Deutschland GmbH, Heiliggeistgasse 28, 85354 Freising, Germany
| | - Sang Moo Kim
- Department of Marine Food Science and Technology, Gangneung-Wonju National University, 7 Jukheon-gil, Gangneung 25457, Korea
| | - Min Hye Yang
- College of Pharmacy, Pusan National University, Busan 46241, Korea
| | - Yong Kee Kim
- College of Pharmacy, Sookmyung Women's University, Seoul 04310, Korea
| | - Su-Nam Kim
- Natural Products Research Institute, Korea Institute of Sceience and Technology (KIST), Gangneung 25451, Korea
- Division of Bio-Medical Science and Technology, KIST School, University of Science and Technology, Seoul 02792, Korea
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Wang Z, Li Z, Bal G, Franke K, Zuberbier T, Babina M. β-arrestin-1 and β-arrestin-2 Restrain MRGPRX2-Triggered Degranulation and ERK1/2 Activation in Human Skin Mast Cells. Front Allergy 2022; 3:930233. [PMID: 35910860 PMCID: PMC9337275 DOI: 10.3389/falgy.2022.930233] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 06/24/2022] [Indexed: 12/19/2022] Open
Abstract
As a novel receptor that efficiently elicits degranulation upon binding to one of its numerous ligands, MRGPRX2 has moved to the center of attention in mast cell (MC) research. Indeed, MRGPRX2 is believed to be a major component of pseudo-allergic reactions to drugs and of neuropeptide-elicited MC activation in skin diseases alike. MRGPRX2 signals via G proteins which organize downstream events ultimately leading to granule discharge. Skin MCs require both PI3K and ERK1/2 cascades for efficient exocytosis. β-arrestins act as opponents of G proteins and lead to signal termination with or without subsequent internalization. We recently demonstrated that ligand-induced internalization of MRGPRX2 requires the action of β-arrestin-1, but not of β-arrestin-2. Here, by using RNA interference, we find that both isoforms counter skin MC degranulation elicited by three MRGPRX2 agonists but not by FcεRI-aggregation. Analyzing whether this occurs through MRGPRX2 stabilization under β-arrestin attenuation, we find that reduction of β-arrestin-1 indeed leads to increased MRGPRX2 abundance, while this is not observed for β-arrestin-2. This led us speculate that β-arrestin-2 is involved in signal termination without cellular uptake of MRGPRX2. This was indeed found to be the case, whereby interference with β-arrestin-2 has an even stronger positive effect on ERK1/2 phosphorylation compared to β-arrestin-1 perturbation. Neither β-arrestin-1 nor β-arrestin-2 had an impact on AKT phosphorylation nor affected signaling via the canonical FcεRI-dependent route. We conclude that in skin MCs, β-arrestin-2 is chiefly involved in signal termination, whereas β-arrestin-1 exerts its effects by controlling MRGPRX2 abundance.
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Affiliation(s)
- Zhao Wang
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Immunology and Allergology IA, Berlin, Germany.,Institute for Allergology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Berlin Institute of Health, Humboldt-Universität zu Berlin, Berlin, Germany.,Department of Dermatology, The Second Affiliated Hospital, Northwest Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Zhuoran Li
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Immunology and Allergology IA, Berlin, Germany.,Institute for Allergology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Berlin Institute of Health, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Gürkan Bal
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Immunology and Allergology IA, Berlin, Germany.,Institute for Allergology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Berlin Institute of Health, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Kristin Franke
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Immunology and Allergology IA, Berlin, Germany.,Institute for Allergology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Berlin Institute of Health, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Torsten Zuberbier
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Immunology and Allergology IA, Berlin, Germany.,Institute for Allergology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Berlin Institute of Health, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Magda Babina
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Immunology and Allergology IA, Berlin, Germany.,Institute for Allergology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Berlin Institute of Health, Humboldt-Universität zu Berlin, Berlin, Germany
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48
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Babaei S, Fathi AN, Babaei S, Babaei S, Baazm M, Sakhaie H. Effect of bromelain on mast cell numbers and degranulation in diabetic rat wound healing. J Wound Care 2022; 31:S4-S11. [PMID: 36004940 DOI: 10.12968/jowc.2022.31.sup8.s4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Many studies have revealed the prominent roles of mast cells in wound healing, including inflammatory reactions, angiogenesis and extracellular matrix reabsorption. In the present study, we aimed to assess the probable therapeutic features of bromelain on wound contraction and mast cell degranulation in wound healing in experimental diabetic animals. METHOD Male rats were grouped as control, vehicle and experiment. Skin wounds were generated in all groups. Treatments were applied with distilled water and with bromelain (BR) intraperitoneally in the vehicle and experimental groups, respectively. Following skin wound generation, animals were euthanised on days 3, 5, 7 and 15. We gathered 16,800 microscopic images to count the mast cells and degranulation level (Image J software). The wound contraction index was assessed both microscopically (Image J software) and macroscopically (time-lapse photography). The meshwork evaluation method was used to assess wound healing. RESULTS Time-lapse photography revealed that the BR significantly (p<0.05) accelerated wound contraction and healing. BR significantly (p<0.05) increased the total number of mast cells in all experimental groups on days 5 and 7. The count of grade III (degranulated) mast cells was reduced significantly (p<0.05) on days 5 and 7 in experimental groups compared to control and vehicle groups. CONCLUSION In this study, the rate of wound healing was accelerated considerably following BR administration. In addition, this agent decreased the count of degranulated mast cells, leading to wound contraction and healing.
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Affiliation(s)
- Saeid Babaei
- Department of Anatomical sciences, Faculty of Medicine, Arak University of Medical Sciences, Arak, Iran
| | - Amene Nikgoftar Fathi
- Department of Anatomical sciences, Faculty of Medicine, Arak University of Medical Sciences, Arak, Iran
| | - Sepehr Babaei
- Faculty of Veterinary Medicine. Azad University of Karaj, Karaj, Iran
| | - Soroush Babaei
- Faculty of Veterinary Medicine. Azad University of Karaj, Karaj, Iran
| | - Maryam Baazm
- Department of Anatomical sciences, Faculty of Medicine, Arak University of Medical Sciences, Arak, Iran
| | - Hassan Sakhaie
- Department of Anatomical sciences, Faculty of Medicine, Arak University of Medical Sciences, Arak, Iran
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49
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Kim G, Itoh S, Ito Y, Ohya S, Hida S. Identification of responsible amino acid residues in Staphylococcal superantigen-like 12 for the activation of mast cells. Genes Cells 2022; 27:559-567. [PMID: 35801715 DOI: 10.1111/gtc.12973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 07/04/2022] [Accepted: 07/06/2022] [Indexed: 11/30/2022]
Abstract
Staphylococcal superantigen-like 12 (SSL12) is reported to evoke the degranulation in murine mast cells. The allelic variant of SSL12 in the genome of reference strain NCTC8325 induced the degranulation of murine mast cells, that of MRSA252 strain did not, nevertheless relatively high sequence similarity (82%). To identify responsible amino acid residues of SSL12 for mast cell activation, we created a series of domain swap mutants and amino acid substitution mutants between the active and inactive variants. The mutants that harbored oligonucleotide/oligosaccharide binding (OB)-fold domain of the active variant activated mast cells. The replacement at position 56 (L56F) in the OB-fold domain diminished the mast cell stimulatory activity, and the combinatorial substitutions L56F/K92E, L56F/D95S, and L56F/S100V abolished the stimulatory activities of the mutant that harbored OB-fold domain of the active variant and the intact active variant. These indicate that the responsive elements of SSL12 for mast cell activation are in the OB-fold of SSL12, and L56 would be an essential amino acid residue for the activation of mast cells. The findings would contribute to the understanding of the molecular mechanism of SSL12 for mast cell activation and the development of toxoids preventing allergic inflammations associated with S. aureus. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Gwangdong Kim
- Department of Molecular and Cellular Health Sciences, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan.,Department of Pharmacology, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Saotomo Itoh
- Department of Molecular and Cellular Health Sciences, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan
| | - Yuma Ito
- Department of Molecular and Cellular Health Sciences, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan
| | - Susumu Ohya
- Department of Pharmacology, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Shigeaki Hida
- Department of Molecular and Cellular Health Sciences, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan
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50
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Cederberg RA, Franks SE, Wadsworth BJ, So A, Decotret LR, Hall MG, Shi R, Hughes MR, McNagny KM, Bennewith KL. Eosinophils Decrease Pulmonary Metastatic Mammary Tumor Growth. Front Oncol 2022; 12:841921. [PMID: 35756626 PMCID: PMC9213661 DOI: 10.3389/fonc.2022.841921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 05/16/2022] [Indexed: 11/13/2022] Open
Abstract
Metastatic breast cancer is challenging to effectively treat, highlighting the need for an improved understanding of host factors that influence metastatic tumor cell colonization and growth in distant tissues. The lungs are a common site of breast cancer metastasis and are host to a population of tissue-resident eosinophils. Eosinophils are granulocytic innate immune cells known for their prominent roles in allergy and Th2 immunity. Though their presence in solid tumors and metastases have been reported for decades, the influence of eosinophils on metastatic tumor growth in the lungs is unclear. We used transgenic mouse models characterized by elevated pulmonary eosinophils (IL5Tg mice) and eosinophil-deficiency (ΔdblGATA mice), as well as antibody-mediated depletion of eosinophils, to study the role of eosinophils in EO771 mammary tumor growth in the lungs. We found that IL5Tg mice exhibit reduced pulmonary metastatic colonization and decreased metastatic tumor burden compared to wild-type (WT) mice or eosinophil-deficient mice. Eosinophils co-cultured with tumor cells ex vivo produced peroxidase activity and induced tumor cell death, indicating that eosinophils are capable of releasing eosinophil peroxidase (EPX) and killing EO771 tumor cells. We found that lung eosinophils expressed phenotypic markers of activation during EO771 tumor growth in the lungs, and that metastatic growth was accelerated in eosinophil-deficient mice and in WT mice after immunological depletion of eosinophils. Our results highlight an important role for eosinophils in restricting mammary tumor cell growth in the lungs and support further work to determine whether strategies to trigger local eosinophil degranulation may decrease pulmonary metastatic growth.
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Affiliation(s)
- Rachel A Cederberg
- Integrative Oncology, BC Cancer, Vancouver, BC, Canada.,Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
| | | | - Brennan J Wadsworth
- Integrative Oncology, BC Cancer, Vancouver, BC, Canada.,Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Alvina So
- Integrative Oncology, BC Cancer, Vancouver, BC, Canada
| | - Lisa R Decotret
- Integrative Oncology, BC Cancer, Vancouver, BC, Canada.,Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Michael G Hall
- Integrative Oncology, BC Cancer, Vancouver, BC, Canada.,Interdisciplinary Oncology Program, University of British Columbia, Vancouver, BC, Canada
| | - Rocky Shi
- Integrative Oncology, BC Cancer, Vancouver, BC, Canada.,Interdisciplinary Oncology Program, University of British Columbia, Vancouver, BC, Canada
| | - Michael R Hughes
- Biomedical Research Centre, University of British Columbia, Vancouver, BC, Canada
| | - Kelly M McNagny
- Biomedical Research Centre, University of British Columbia, Vancouver, BC, Canada.,Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Kevin L Bennewith
- Integrative Oncology, BC Cancer, Vancouver, BC, Canada.,Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada.,Interdisciplinary Oncology Program, University of British Columbia, Vancouver, BC, Canada
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