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VanderVeen BN, Cardaci TD, Bullard BM, Madden M, Li J, Velazquez KT, Kubinak JL, Fan D, Murphy EA. Involvement of the gut microbiota in cancer cachexia. Am J Physiol Cell Physiol 2024; 327:C661-C670. [PMID: 38981609 DOI: 10.1152/ajpcell.00327.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Revised: 06/20/2024] [Accepted: 07/02/2024] [Indexed: 07/11/2024]
Abstract
Cancer cachexia, or the unintentional loss of body weight in patients with cancer, is a multiorgan and multifactorial syndrome with a complex and largely unknown etiology; however, metabolic dysfunction and inflammation remain hallmarks of cancer-associated wasting. Although cachexia manifests with muscle and adipose tissue loss, perturbations to the gastrointestinal tract may serve as the frontline for both impaired nutrient absorption and immune-activating gut dysbiosis. Investigations into the gut microbiota have exploded within the past two decades, demonstrating multiple gut-tissue axes; however, the link between adipose and skeletal muscle wasting and the gut microbiota with cancer is only beginning to be understood. Furthermore, the most used anticancer drugs (e.g. chemotherapy and immune checkpoint inhibitors) negatively impact gut homeostasis, potentially exacerbating wasting and contributing to poor patient outcomes and survival. In this review, we 1) highlight our current understanding of the microbial changes that occur with cachexia, 2) discuss how microbial changes may contribute to adipose and skeletal muscle wasting, and 3) outline study design considerations needed when examining the role of the microbiota in cancer-induced cachexia.
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Affiliation(s)
- Brandon N VanderVeen
- Department of Pathology, Microbiology and Immunology, School of Medicine Columbia, University of South Carolina, Columbia, South Carolina, United States
| | - Thomas D Cardaci
- Department of Pathology, Microbiology and Immunology, School of Medicine Columbia, University of South Carolina, Columbia, South Carolina, United States
| | - Brooke M Bullard
- Department of Pathology, Microbiology and Immunology, School of Medicine Columbia, University of South Carolina, Columbia, South Carolina, United States
| | - Michael Madden
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina, United States
| | - Jie Li
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina, United States
| | - Kandy T Velazquez
- Department of Pathology, Microbiology and Immunology, School of Medicine Columbia, University of South Carolina, Columbia, South Carolina, United States
| | - Jason L Kubinak
- Department of Pathology, Microbiology and Immunology, School of Medicine Columbia, University of South Carolina, Columbia, South Carolina, United States
| | - Daping Fan
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina, United States
| | - E Angela Murphy
- Department of Pathology, Microbiology and Immunology, School of Medicine Columbia, University of South Carolina, Columbia, South Carolina, United States
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2
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Wei J, Ning H, Ramos‐Espinosa O, Eickhoff CS, Hou R, Wang Q, Fu M, Liu EY, Fan D, Hoft DF, Liu J. Tristetraprolin mediates immune evasion of mycobacterial infection in macrophages. FASEB Bioadv 2024; 6:249-262. [PMID: 39114448 PMCID: PMC11301268 DOI: 10.1096/fba.2024-00022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 05/15/2024] [Accepted: 05/30/2024] [Indexed: 08/10/2024] Open
Abstract
Immune evasion of Mycobacterium tuberculosis (Mtb) facilitates intracellular bacterial growth. The mechanisms of immune evasion, however, are still not fully understood. In this study, we reveal that tristetraprolin (TTP), one of the best characterized RNA-binding proteins controlling the stability of targeted mRNAs, mediates innate immune evasion of mycobacteria. We found that TTP knockout mice displayed reduced bacterial burden in the early stage after Mtb aerosol challenge. Macrophages deficient in TTP also showed an inhibition in intracellular mycobacterial growth. Live mycobacteria induced TTP protein expression in macrophages, which was blocked by the mTOR inhibitor rapamycin. Rapamycin and AZD8055 specifically blocked 4EBP1 phosphorylation in infected macrophages and suppressed intracellular BCG growth. Rapamycin promoted TTP protein degradation through the ubiquitination pathway, whereas the proteasome inhibitor MG-132 blocked rapamycin function and thus stabilized TTP protein. TTP induction suppressed the expression of iNOS/TNF-α/IL-12/IL-23, and weakened protective immune responses in macrophages, whereas rapamycin enhanced the bactericidal effects through TTP inhibition. Moreover, blocking TTP binding increased the expression of TNF-α and iNOS and suppressed intracellular mycobacterial growth. Overall, our study reveals a novel role for RNA-binding protein TTP in Mtb immune evasion mechanisms and provides a potential target for host-directed therapy against tuberculosis (TB).
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Affiliation(s)
- Jiawei Wei
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal MedicineSaint Louis University School of Medicine, Saint Louis UniversitySt. LouisMissouriUSA
| | - Huan Ning
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal MedicineSaint Louis University School of Medicine, Saint Louis UniversitySt. LouisMissouriUSA
| | - Octavio Ramos‐Espinosa
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal MedicineSaint Louis University School of Medicine, Saint Louis UniversitySt. LouisMissouriUSA
| | - Christopher S. Eickhoff
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal MedicineSaint Louis University School of Medicine, Saint Louis UniversitySt. LouisMissouriUSA
| | - Rong Hou
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal MedicineSaint Louis University School of Medicine, Saint Louis UniversitySt. LouisMissouriUSA
| | - Qinghong Wang
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal MedicineSaint Louis University School of Medicine, Saint Louis UniversitySt. LouisMissouriUSA
| | - Mingui Fu
- Shock/Trauma Research Center, Department of Basic Medical Science, School of MedicineUniversity of Missouri‐Kansas CityKansas CityMissouriUSA
| | - Ethan Y. Liu
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal MedicineSaint Louis University School of Medicine, Saint Louis UniversitySt. LouisMissouriUSA
| | - Daping Fan
- Department of Cell Biology and AnatomyUniversity of South Carolina School of MedicineColumbiaSouth CarolinaUSA
| | - Daniel F. Hoft
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal MedicineSaint Louis University School of Medicine, Saint Louis UniversitySt. LouisMissouriUSA
| | - Jianguo Liu
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal MedicineSaint Louis University School of Medicine, Saint Louis UniversitySt. LouisMissouriUSA
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3
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Nebuloni F, Deroy C, Cook PR, Walsh EJ. Stable diffusion gradients in microfluidic conduits bounded by fluid walls. MICROSYSTEMS & NANOENGINEERING 2024; 10:79. [PMID: 38911344 PMCID: PMC11189932 DOI: 10.1038/s41378-024-00698-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 04/02/2024] [Indexed: 06/25/2024]
Abstract
Assays mimicking in vitro the concentration gradients triggering biological responses like those involved in fighting infections and blood clotting are essential for biomedical research. Microfluidic assays prove especially attractive as they allow precise control of gradient shape allied to a reduction in scale. Conventional microfluidic devices are fabricated using solid plastics that prevent direct access to responding cells. Fluid-walled microfluidics allows the manufacture of circuits on standard Petri dishes in seconds, coupled to simple operating methods; cell-culture medium sitting in a standard dish is confined to circuits by fluid walls made of an immiscible fluorocarbon. We develop and experimentally validate an analytical model of diffusion between two or more aqueous streams flowing at different rates into a fluid-walled conduit with the cross-section of a circular segment. Unlike solid walls, fluid walls morph during flows as pressures fall, with wall shape changing down the conduit. The model is validated experimentally for Fourier numbers < 0.1 using fluorescein diffusing between laminar streams. It enables a priori prediction of concentration gradients throughout a conduit, so allowing rapid circuit design as well as providing bio-scientists with an accurate way of predicting local concentrations of bioactive molecules around responsive and non-responsive cells.
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Affiliation(s)
- Federico Nebuloni
- Department of Engineering Science, Osney Thermo-Fluids Institute, University of Oxford, Oxford, OX2 0ES UK
- Sir William Dunn School of Pathology, University of Oxford, Oxford, OX1 3RE UK
| | - Cyril Deroy
- Department of Engineering Science, Osney Thermo-Fluids Institute, University of Oxford, Oxford, OX2 0ES UK
- Sir William Dunn School of Pathology, University of Oxford, Oxford, OX1 3RE UK
| | - Peter R. Cook
- Sir William Dunn School of Pathology, University of Oxford, Oxford, OX1 3RE UK
| | - Edmond J. Walsh
- Department of Engineering Science, Osney Thermo-Fluids Institute, University of Oxford, Oxford, OX2 0ES UK
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4
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Staroverov SA, Vyrshchikov RD, Bogatyrev VA, Dykman LA. The immunostimulatory roles of gold nanoparticles in immunization and vaccination against Brucella abortus antigens. Int Immunopharmacol 2024; 133:112121. [PMID: 38652965 DOI: 10.1016/j.intimp.2024.112121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/07/2024] [Accepted: 04/17/2024] [Indexed: 04/25/2024]
Abstract
One effective antigen carrier proposed for use in immunization and vaccination is gold nanoparticles. Prior work has shown that gold nanoparticles themselves have adjuvant properties. Currently, gold nanoparticles are used to design new diagnostic tests and vaccines against viral, bacterial, and parasitic infections. We investigated the use of gold nanoparticles as immunomodulators in immunization and vaccination with an antigen isolated from Brucella abortus. Gold nanoparticles with a diameter of 15 nm were synthesized for immunization of animals and were then conjugated to the isolated antigen. The conjugates were used to immunize white BALB/c mice. As a result, high-titer (1:10240) antibodies were produced. The respiratory and proliferative activities of immune cells were increased, as were the serum interleukin concentrations. The minimum antigen amount detected with the produced antibodies was ∼ 0.5 pg. The mice immunized with gold nanoparticles complexed with the B. abortus antigen were more resistant to B. abortus strain 82 than were the mice immunized through other schemes. This fact indicates that animal immunization with this conjugate enhances the effectiveness of the immune response. The results of this study are expected to be used in further work to examine the protective effect of gold nanoparticles complexed with the B. abortus antigen on immunized animals and to develop test systems for diagnosing brucellosis in the laboratory and in the field.
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Affiliation(s)
- Sergey A Staroverov
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Saratov Scientific Centre of the Russian Academy of Sciences (IBPPM RAS), 13 Prospect Entuziastov, Saratov 410049, Russia
| | - Roman D Vyrshchikov
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Saratov Scientific Centre of the Russian Academy of Sciences (IBPPM RAS), 13 Prospect Entuziastov, Saratov 410049, Russia
| | - Vladimir A Bogatyrev
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Saratov Scientific Centre of the Russian Academy of Sciences (IBPPM RAS), 13 Prospect Entuziastov, Saratov 410049, Russia
| | - Lev A Dykman
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Saratov Scientific Centre of the Russian Academy of Sciences (IBPPM RAS), 13 Prospect Entuziastov, Saratov 410049, Russia.
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5
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Parker J, Marten SM, Ó Corcora TC, Rajkov J, Dubin A, Roth O. The effects of primary and secondary bacterial exposure on the seahorse (Hippocampus erectus) immune response. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2024; 153:105136. [PMID: 38185263 DOI: 10.1016/j.dci.2024.105136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 12/21/2023] [Accepted: 01/04/2024] [Indexed: 01/09/2024]
Abstract
Evolutionary adaptations in the Syngnathidae teleost family (seahorses, pipefish and seadragons) culminated in an array of spectacular morphologies, key immune gene losses, and the enigmatic male pregnancy. In seahorses, genome modifications associated with immunoglobulins, complement, and major histocompatibility complex (MHC II) pathway components raise questions concerning their immunological efficiency and the evolution of compensatory measures that may act in their place. In this investigation heat-killed bacteria (Vibrio aestuarianus and Tenacibaculum maritimum) were used in a two-phased experiment to assess the immune response dynamics of Hippocampus erectus. Gill transcriptomes from double and single-exposed individuals were analysed in order to determine the differentially expressed genes contributing to immune system responses towards immune priming. Double-exposed individuals exhibited a greater adaptive immune response when compared with single-exposed individuals, while single-exposed individuals, particularly with V. aestuarianus replicates, associated more with the innate branch of the immune system. T. maritimum double-exposed replicates exhibited the strongest immune reaction, likely due to their immunological naivety towards the bacterium, while there are also potential signs of innate trained immunity. MHC II upregulated expression was identified in selected V. aestuarianus-exposed seahorses, in the absence of other pathway constituents suggesting a possible alternative or non-classical MHC II immune function in seahorses. Gene Ontology (GO) enrichment analysis highlighted prominent angiogenesis activity following secondary exposure, which could be linked to an adaptive immune process in seahorses. This investigation highlights the prominent role of T-cell mediated adaptive immune responses in seahorses when exposed to sequential foreign bacteria exposures. If classical MHC II pathway function has been lost, innate trained immunity in syngnathids could be a potential compensatory mechanism.
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Affiliation(s)
- Jamie Parker
- Marine Evolutionary Biology, Christian-Albrechts-University, D-24118, Kiel, Germany.
| | - Silke-Mareike Marten
- Marine Evolutionary Biology, Christian-Albrechts-University, D-24118, Kiel, Germany
| | - Tadhg C Ó Corcora
- Marine Evolutionary Ecology, GEOMAR Helmholtz Centre for Ocean Research Kiel, D-24105, Kiel, Germany
| | - Jelena Rajkov
- Marine Evolutionary Ecology, GEOMAR Helmholtz Centre for Ocean Research Kiel, D-24105, Kiel, Germany
| | - Arseny Dubin
- Marine Evolutionary Biology, Christian-Albrechts-University, D-24118, Kiel, Germany
| | - Olivia Roth
- Marine Evolutionary Biology, Christian-Albrechts-University, D-24118, Kiel, Germany
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6
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Chen L, Mei W, Song J, Chen K, Ni W, Wang L, Li Z, Ge X, Su L, Jiang C, Liu B, Dai C. CD163 protein inhibits lipopolysaccharide-induced macrophage transformation from M2 to M1 involved in disruption of the TWEAK-Fn14 interaction. Heliyon 2024; 10:e23223. [PMID: 38148798 PMCID: PMC10750081 DOI: 10.1016/j.heliyon.2023.e23223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 11/21/2023] [Accepted: 11/29/2023] [Indexed: 12/28/2023] Open
Abstract
Macrophages play a crucial role in regulating inflammation and innate immune responses, and their polarization into distinct phenotypes, such as M1 and M2, is involved in various diseases. However, the specific role of CD163, a scavenger receptor expressed by macrophages, in the transformation of M2 to M1 macrophages remains unclear. Here, dexamethasone-induced M2 macrophages were treated with lipopolysaccharide (LPS) to induce the transformation of M2 to M1 macrophages. We found that treatment with lipopolysaccharide (LPS) induced the transformation of M2-like macrophages to an M1-like phenotype, as evidenced by increased mRNA levels of Il1b and Tnf, decreased mRNA levels of Cd206 and Il10, and increased TNF-α secretion. Knockdown of CD163 enhanced the phenotypic features of M1 macrophages, while treatment with recombinant CD163 protein (rmCD163) inhibited the LPS-induced M2-to-M1 transformation. Furthermore, LPS stimulation resulted in the activation of P38, ERK, JNK, and NF-κB P65 signaling pathways, and this activation was increased after CD163 knockdown and suppressed after rmCD163 treatment during macrophage transformation. Additionally, we observed that LPS treatment reduced the expression of CD163 in dexamethasone-induced M2 macrophages, leading to a decrease in the CD163-TWEAK complex and an increase in the interaction between TWEAK and Fn14. Overall, our findings suggest that rmCD163 can inhibit the LPS-induced transformation of M2 macrophages to M1 by disrupting the TWEAK-Fn14 interaction and modulating the MAPK-NF-κB pathway.
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Affiliation(s)
- Linjian Chen
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Jinshan Road 2999, Xiamen, 361015, China
| | - Wanchun Mei
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Jinshan Road 2999, Xiamen, 361015, China
| | - Juan Song
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Jinshan Road 2999, Xiamen, 361015, China
| | - Kuncheng Chen
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Jinshan Road 2999, Xiamen, 361015, China
| | - Wei Ni
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Jinshan Road 2999, Xiamen, 361015, China
| | - Lin Wang
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Jinshan Road 2999, Xiamen, 361015, China
| | - Zhaokai Li
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Jinshan Road 2999, Xiamen, 361015, China
| | - Xiaofeng Ge
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Jinshan Road 2999, Xiamen, 361015, China
| | - Liuhang Su
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Jinshan Road 2999, Xiamen, 361015, China
| | - Chenlu Jiang
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Jinshan Road 2999, Xiamen, 361015, China
| | - Binbin Liu
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Jinshan Road 2999, Xiamen, 361015, China
| | - Cuilian Dai
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Jinshan Road 2999, Xiamen, 361015, China
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7
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Leiba J, Sipka T, Begon-Pescia C, Bernardello M, Tairi S, Bossi L, Gonzalez AA, Mialhe X, Gualda EJ, Loza-Alvarez P, Blanc-Potard A, Lutfalla G, Nguyen-Chi ME. Dynamics of macrophage polarization support Salmonella persistence in a whole living organism. eLife 2024; 13:e89828. [PMID: 38224094 PMCID: PMC10830131 DOI: 10.7554/elife.89828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 01/14/2024] [Indexed: 01/16/2024] Open
Abstract
Numerous intracellular bacterial pathogens interfere with macrophage function, including macrophage polarization, to establish a niche and persist. However, the spatiotemporal dynamics of macrophage polarization during infection within host remain to be investigated. Here, we implement a model of persistent Salmonella Typhimurium infection in zebrafish, which allows visualization of polarized macrophages and bacteria in real time at high resolution. While macrophages polarize toward M1-like phenotype to control early infection, during later stages, Salmonella persists inside non-inflammatory clustered macrophages. Transcriptomic profiling of macrophages showed a highly dynamic signature during infection characterized by a switch from pro-inflammatory to anti-inflammatory/pro-regenerative status and revealed a shift in adhesion program. In agreement with this specific adhesion signature, macrophage trajectory tracking identifies motionless macrophages as a permissive niche for persistent Salmonella. Our results demonstrate that zebrafish model provides a unique platform to explore, in a whole organism, the versatile nature of macrophage functional programs during bacterial acute and persistent infections.
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Affiliation(s)
- Jade Leiba
- LPHI, Université de Montpellier, CNRS, INSERMMontpellierFrance
| | - Tamara Sipka
- LPHI, Université de Montpellier, CNRS, INSERMMontpellierFrance
| | | | - Matteo Bernardello
- ICFO - Institute of Photonic Sciences, The Barcelona Institute of Science and TechnologyCastelldefels, BarcelonaSpain
| | - Sofiane Tairi
- LPHI, Université de Montpellier, CNRS, INSERMMontpellierFrance
| | - Lionello Bossi
- Institute for Integrative Biology of the Cell-I2BC, Université Paris-Saclay, CEA, CNRSGif-sur-YvetteFrance
| | - Anne-Alicia Gonzalez
- MGX-Montpellier GenomiX, Université de Montpellier, CNRS, INSERMMontpellierFrance
| | - Xavier Mialhe
- MGX-Montpellier GenomiX, Université de Montpellier, CNRS, INSERMMontpellierFrance
| | - Emilio J Gualda
- ICFO - Institute of Photonic Sciences, The Barcelona Institute of Science and TechnologyCastelldefels, BarcelonaSpain
| | - Pablo Loza-Alvarez
- ICFO - Institute of Photonic Sciences, The Barcelona Institute of Science and TechnologyCastelldefels, BarcelonaSpain
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8
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Hoang TX, Kim JY. Regulatory macrophages in solid organ xenotransplantation. KOREAN JOURNAL OF TRANSPLANTATION 2023; 37:229-240. [PMID: 38115165 PMCID: PMC10772277 DOI: 10.4285/kjt.23.0055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 11/10/2023] [Accepted: 11/24/2023] [Indexed: 12/21/2023] Open
Abstract
Due to a critical organ shortage, pig organs are being explored for use in transplantation. Differences between species, particularly in cell surface glycans, can trigger elevated immune responses in xenotransplantation. To mitigate the risk of hyperacute rejection, genetically modified pigs have been developed that lack certain glycans and express human complement inhibitors. Nevertheless, organs from these pigs may still provoke stronger inflammatory and innate immune reactions than allotransplants. Dysregulation of coagulation and persistent inflammation remain obstacles in the transplantation of pig organs into primates. Regulatory macrophages (Mregs), known for their anti-inflammatory properties, could offer a potential solution. Mregs secrete interleukin 10 and transforming growth factor beta, thereby suppressing immune responses and promoting the development of regulatory T cells. These Mregs are typically induced via the stimulation of monocytes or macrophages with macrophage colony-stimulating factor and interferon gamma, and they conspicuously express the stable marker dehydrogenase/reductase 9. Consequently, understanding the precise mechanisms governing Mreg generation, stability, and immunomodulation could pave the way for the therapeutic use of Mregs generated in vitro. This approach has the potential to reduce the required dosages and durations of anti-inflammatory and immunosuppressive medications in preclinical and clinical settings.
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Affiliation(s)
- Thi Xoan Hoang
- Department of Life Science, Gachon University, Seongnam, Korea
| | - Jae Young Kim
- Department of Life Science, Gachon University, Seongnam, Korea
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9
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Lee YM, Hsu CL, Chen YH, Ou DL, Hsu C, Tan CT. Genomic and Transcriptomic Landscape of an Oral Squamous Cell Carcinoma Mouse Model for Immunotherapy. Cancer Immunol Res 2023; 11:1553-1567. [PMID: 37669022 PMCID: PMC10618654 DOI: 10.1158/2326-6066.cir-23-0133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 06/14/2023] [Accepted: 08/30/2023] [Indexed: 09/06/2023]
Abstract
The immune checkpoint inhibitor (ICI), anti-programmed death-1 (anti-PD-1), has shown moderate efficacy in some patients with head and neck squamous cell carcinoma (HNSCC). Because of this, it is imperative to establish a mouse tumor model to explore mechanisms of antitumor immunity and to develop novel therapeutic options. Here, we examined the 4-nitroquinoline-1-oxide (4NQO)-induced oral squamous cell carcinoma (OSCC) model for genetic aberrations, transcriptomic profiles, and immune cell composition at different pathologic stages. Genomic exome analysis in OSCC-bearing mice showed conservation of critical mutations found in human HNSCC. Transcriptomic data revealed that a key signature comprised of immune-related genes was increased beginning at the moderate dysplasia stages. We first identified that macrophage composition in primary tumors differed across pathologic stages, leading to an oncogenic evolution through a change in the M1/M2 macrophage ratio during tumorigenesis. We treated the 4NQO-induced OSCC-bearing mice with anti-PD-1 and agonistic anti-CD40, which modulated multiple immune responses. The growth of tumor cells was significantly decreased by agonistic anti-CD40 by promoting an increase in the M1/M2 ratio. By examining cross-species genomic conservation in human and mouse tumors, our study demonstrates the molecular mechanisms underlying the development of OSCC and the regulation of contributing immune-related factors, and aims to facilitate the development of suitable ICI-based treatments for patients with HNSCC.
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Affiliation(s)
- Yi-Mei Lee
- Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan
- Stem Cell Core Laboratory, Center of Genomic Medicine, National Taiwan University, Taipei, Taiwan
| | - Chia-Lang Hsu
- Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan
- Graduate Institute of Oncology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yu-Hsin Chen
- Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan
- Stem Cell Core Laboratory, Center of Genomic Medicine, National Taiwan University, Taipei, Taiwan
- Graduate Institute of Oncology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Da-Liang Ou
- Graduate Institute of Oncology, National Taiwan University College of Medicine, Taipei, Taiwan
- YongLin Institute of Health, National Taiwan University, Taipei, Taiwan
| | - Chiun Hsu
- Graduate Institute of Oncology, National Taiwan University College of Medicine, Taipei, Taiwan
- Department of Oncology, National Taiwan University Cancer Center, Taipei, Taiwan
- Department of Oncology, National Taiwan University Hospital, Taipei, Taiwan
| | - Ching-Ting Tan
- Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan
- Stem Cell Core Laboratory, Center of Genomic Medicine, National Taiwan University, Taipei, Taiwan
- Department of Otolaryngology, National Taiwan University College of Medicine, Taipei, Taiwan
- Department of Otolaryngology, National Taiwan University Hospital Hsin-Chu Branch, Hsinchu, Taiwan
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10
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Ji ZZ, Chan MKK, Chan ASW, Leung KT, Jiang X, To KF, Wu Y, Tang PMK. Tumour-associated macrophages: versatile players in the tumour microenvironment. Front Cell Dev Biol 2023; 11:1261749. [PMID: 37965573 PMCID: PMC10641386 DOI: 10.3389/fcell.2023.1261749] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 10/12/2023] [Indexed: 11/16/2023] Open
Abstract
Tumour-Associated Macrophages (TAMs) are one of the pivotal components of the tumour microenvironment. Their roles in the cancer immunity are complicated, both pro-tumour and anti-cancer activities are reported, including not only angiogenesis, extracellular matrix remodeling, immunosuppression, drug resistance but also phagocytosis and tumour regression. Interestingly, TAMs are highly dynamic and versatile in solid tumours. They show anti-cancer or pro-tumour activities, and interplay between the tumour microenvironment and cancer stem cells and under specific conditions. In addition to the classic M1/M2 phenotypes, a number of novel dedifferentiation phenomena of TAMs are discovered due to the advanced single-cell technology, e.g., macrophage-myofibroblast transition (MMT) and macrophage-neuron transition (MNT). More importantly, emerging information demonstrated the potential of TAMs on cancer immunotherapy, suggesting by the therapeutic efficiency of the checkpoint inhibitors and chimeric antigen receptor engineered cells based on macrophages. Here, we summarized the latest discoveries of TAMs from basic and translational research and discussed their clinical relevance and therapeutic potential for solid cancers.
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Affiliation(s)
- Zoey Zeyuan Ji
- Department of Anatomical and Cellular Pathology, State Key Laboratory of Translational Oncology, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Max Kam-Kwan Chan
- Department of Anatomical and Cellular Pathology, State Key Laboratory of Translational Oncology, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Alex Siu-Wing Chan
- Department of Applied Social Sciences, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China
| | - Kam-Tong Leung
- Department of Paediatrics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Xiaohua Jiang
- Key Laboratory for Regenerative Medicine of the Ministry of Education of China, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Ka-Fai To
- Department of Anatomical and Cellular Pathology, State Key Laboratory of Translational Oncology, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Yi Wu
- MOE Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an, China
| | - Patrick Ming-Kuen Tang
- Department of Anatomical and Cellular Pathology, State Key Laboratory of Translational Oncology, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
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11
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Eigenschink M, Wessely I, Dijmarescu M, Förster-Waldl E, Farr A, Kiss H, Berger A, Wisgrill L. Transcriptomic analysis identifies lactoferrin-induced quiescent circuits in neonatal macrophages. Front Immunol 2023; 14:1276173. [PMID: 37868991 PMCID: PMC10590118 DOI: 10.3389/fimmu.2023.1276173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 09/18/2023] [Indexed: 10/24/2023] Open
Abstract
Introduction Upon birth, a hitherto naïve immune system is confronted with a plethora of microbial antigens due to intestinal bacterial colonization. To prevent excessive inflammation and disruption of the epithelial barrier, physiological mechanisms must promote immune-anergy within the neonatal gut. As high concentrations of human lactoferrin (hLF), a transferrin glycoprotein shown to modulate macrophage function, are frequently encountered in colostrum, its direct interaction with intestinal macrophages may satisfy this physiological need. Thus, the primary objective of this study was to investigate transcriptional changes induced by human lactoferrin in neonatal monocyte-derived macrophages. Methods Cord blood-derived monocytes were differentiated with M-CSF in presence or absence of 500 µg/mL hLF for 7 days and afterwards stimulated with 1 ng/mL LPS or left untreated. RNA was then isolated and subjected to microarray analysis. Results Differentiation of cord blood-derived monocytes in presence of hLF induced a distinct transcriptional program defined by cell cycle arrest in the G2/M phase, induction of IL-4/IL-13-like signaling, altered extracellular matrix interaction, and enhanced propensity for cell-cell interaction. Moreover, near-complete abrogation of transcriptional changes induced by TLR4 engagement with LPS was observed in hLF-treated samples. Discussion The global transition towards an M2-like homeostatic phenotype and the acquisition of quiescence elegantly demonstrate the ontogenetical relevance of hLF in attenuating pro-inflammatory signaling within the developing neonatal intestine. The marked anergy towards proinflammatory stimuli such as LPS further underlines the glycoprotein's potential therapeutic relevance.
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Affiliation(s)
- Michael Eigenschink
- Division of Neonatology, Pediatric Intensive Care and Neuropaediatrics, Department of Pediatrics and Adolescent Medicine, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Isabelle Wessely
- Division of Neonatology, Pediatric Intensive Care and Neuropaediatrics, Department of Pediatrics and Adolescent Medicine, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Marco Dijmarescu
- Division of Neonatology, Pediatric Intensive Care and Neuropaediatrics, Department of Pediatrics and Adolescent Medicine, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Elisabeth Förster-Waldl
- Division of Neonatology, Pediatric Intensive Care and Neuropaediatrics, Department of Pediatrics and Adolescent Medicine, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Alex Farr
- Department of Obstetrics and Gynecology, Division of Obstetrics and Feto-Maternal Medicine, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Herbert Kiss
- Department of Obstetrics and Gynecology, Division of Obstetrics and Feto-Maternal Medicine, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Angelika Berger
- Division of Neonatology, Pediatric Intensive Care and Neuropaediatrics, Department of Pediatrics and Adolescent Medicine, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Lukas Wisgrill
- Division of Neonatology, Pediatric Intensive Care and Neuropaediatrics, Department of Pediatrics and Adolescent Medicine, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria
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12
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Chaukimath P, Frankel G, Visweswariah SS. The metabolic impact of bacterial infection in the gut. FEBS J 2023; 290:3928-3945. [PMID: 35731686 DOI: 10.1111/febs.16562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 06/02/2022] [Accepted: 06/21/2022] [Indexed: 08/17/2023]
Abstract
Bacterial infections of the gut are one of the major causes of morbidity and mortality worldwide. The interplay between the pathogen and the host is finely balanced, with the bacteria evolving to proliferate and establish infection. In contrast, the host mounts a response to first restrict and then eliminate the infection. The intestine is a rapidly proliferating tissue, and metabolism is tuned to cater to the demands of proliferation and differentiation along the crypt-villus axis (CVA) in the gut. As bacterial pathogens encounter the intestinal epithelium, they elicit changes in the host cell, and core metabolic pathways such as the tricarboxylic acid (TCA) cycle, lipid metabolism and glycolysis are affected. This review highlights the mechanisms utilized by diverse gut bacterial pathogens to subvert host metabolism and describes host responses to the infection.
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Affiliation(s)
- Pooja Chaukimath
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore, India
| | - Gad Frankel
- Centre for Molecular Bacteriology and Infection and Department of Life Sciences, Imperial College, London, UK
| | - Sandhya S Visweswariah
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore, India
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13
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Kayongo A, Nyiro B, Siddharthan T, Kirenga B, Checkley W, Lutaakome Joloba M, Ellner J, Salgame P. Mechanisms of lung damage in tuberculosis: implications for chronic obstructive pulmonary disease. Front Cell Infect Microbiol 2023; 13:1146571. [PMID: 37415827 PMCID: PMC10320222 DOI: 10.3389/fcimb.2023.1146571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 06/05/2023] [Indexed: 07/08/2023] Open
Abstract
Pulmonary tuberculosis is increasingly recognized as a risk factor for COPD. Severe lung function impairment has been reported in post-TB patients. Despite increasing evidence to support the association between TB and COPD, only a few studies describe the immunological basis of COPD among TB patients following successful treatment completion. In this review, we draw on well-elaborated Mycobacterium tuberculosis-induced immune mechanisms in the lungs to highlight shared mechanisms for COPD pathogenesis in the setting of tuberculosis disease. We further examine how such mechanisms could be exploited to guide COPD therapeutics.
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Affiliation(s)
- Alex Kayongo
- Department of Medicine, Center for Emerging Pathogens, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, United States
- Department of Immunology and Molecular Biology, College of Health Sciences, Makerere University, Kampala, Uganda
- Makerere University College of Health Sciences, Lung Institute, Makerere University, Kampala, Uganda
| | - Brian Nyiro
- Department of Medicine, Center for Emerging Pathogens, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, United States
- Department of Immunology and Molecular Biology, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Trishul Siddharthan
- Division of Pulmonary and Critical Care Medicine, University of Miami, Miami, FL, United States
| | - Bruce Kirenga
- Makerere University College of Health Sciences, Lung Institute, Makerere University, Kampala, Uganda
| | - William Checkley
- Division of Pulmonary and Critical Care Medicine, Johns Hopkins University, Baltimore, MD, United States
- Center for Global Non-Communicable Disease Research and Training, School of Medicine, Johns Hopkins University, Baltimore, MD, United States
| | - Moses Lutaakome Joloba
- Makerere University College of Health Sciences, Lung Institute, Makerere University, Kampala, Uganda
| | - Jerrold Ellner
- Department of Medicine, Center for Emerging Pathogens, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, United States
| | - Padmini Salgame
- Department of Medicine, Center for Emerging Pathogens, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, United States
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14
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Pham HL, Hoang TX, Kim JY. Human Regulatory Macrophages Derived from THP-1 Cells Using Arginylglycylaspartic Acid and Vitamin D3. Biomedicines 2023; 11:1740. [PMID: 37371835 DOI: 10.3390/biomedicines11061740] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 06/15/2023] [Accepted: 06/15/2023] [Indexed: 06/29/2023] Open
Abstract
Regulatory macrophages (Mregs) are unique in that they have anti-inflammatory and immunosuppressive properties. Thus, treating inflammatory diseases using Mregs is an area of active research. Human Mregs are usually generated by culturing peripheral blood monocytes stimulated using a macrophage colony-stimulating factor with interferon (IFN)-γ. Herein, we generated Mregs with an elongated cell morphology from THP-1 cells that were stimulated with phorbol 12-myristate 13-acetate and cultured with both arginylglycylaspartic acid and vitamin D3. These Mregs regulated macrophage function, and respectively downregulated and upregulated the expression of pro-inflammatory and immunosuppressive mediators. They also expressed Mregs-specific markers, such as dehydrogenase/reductase 9, even when exposed to such inflammatory stimulants as IFN-γ, lipopolysaccharide, purified xenogeneic antigen, and xenogeneic cells. The Mregs also exerted anti-inflammatory and anticoagulatory actions in response to xenogeneic cells, as well as exerting immunosuppressive effects on mitogen-induced Jurkat T-cell proliferation. Our method of generating functional Mregs in vitro without cytokines is simple and cost-effective.
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Affiliation(s)
- Hoang Lan Pham
- Department of Life Science, Gachon University, Seongnam 13120, Gyeonggi-Do, Republic of Korea
| | - Thi Xoan Hoang
- Department of Life Science, Gachon University, Seongnam 13120, Gyeonggi-Do, Republic of Korea
| | - Jae Young Kim
- Department of Life Science, Gachon University, Seongnam 13120, Gyeonggi-Do, Republic of Korea
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15
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Edwards C, Oakes RS, Jewell CM. Tuning innate immune function using microneedles containing multiple classes of toll-like receptor agonists. NANOSCALE 2023; 15:8662-8674. [PMID: 37185984 PMCID: PMC10358826 DOI: 10.1039/d3nr00333g] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Microneedle arrays (MNAs) are patches displaying hundreds of micron-scale needles that can penetrate skin. As a result, these arrays efficiently and painlessly access this immune cell-rich niche, motivating significant clinical interest in MNA-based vaccines. Our lab has developed immune polyelectrolyte multilayers (iPEMs), nanostructures built entirely from immune signals employing electrostatic self-assembly. iPEMs consist of positively charged peptide antigen and negatively charged toll-like receptor agonists (TLRas) to assemble these components at ultra-high density since no carrier is needed. Here we used this technology to deliver MNAs with antigen and defined ratios of multiple classes of TLRa. Notably, this approach resulted in facile assembly and corresponding signal transduction through each respective TLR pathway. This control ultimately activated primary antigen presenting cells and drove proliferation of antigen-specific T cells. In related in vivo vaccine studies, application of MNAs resulted in distinct T cells response depending on the number of TLRa classes delivered with MNAs. These MNAs technologies create an opportunity to deliver nanostructured vaccine components at high density, and to probe integration of multiple TLRas in skin to tune immunity.
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Affiliation(s)
- Camilla Edwards
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA.
| | - Robert S Oakes
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA.
- United States Department of Veterans Affairs, VA Maryland Health Care System, Baltimore, MD 21201, USA
| | - Christopher M Jewell
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA.
- United States Department of Veterans Affairs, VA Maryland Health Care System, Baltimore, MD 21201, USA
- Robert E. Fischell Institute for Biomedical Devices, College Park, MD 20742, USA
- Department of Microbiology and Immunology, University of Maryland Medical School, Baltimore, MD 21201, USA
- Marlene and Stewart Greenebaum Cancer Center, Baltimore, MD 21201, USA
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16
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Sheu KM, Guru AA, Hoffmann A. Quantifying stimulus-response specificity to probe the functional state of macrophages. Cell Syst 2023; 14:180-195.e5. [PMID: 36657439 PMCID: PMC10023480 DOI: 10.1016/j.cels.2022.12.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 10/05/2022] [Accepted: 12/22/2022] [Indexed: 01/19/2023]
Abstract
Immune sentinel macrophages initiate responses to pathogens via hundreds of immune response genes. Each immune threat demands a tailored response, suggesting that the capacity for stimulus-specific gene expression is a key functional hallmark of healthy macrophages. To quantify this property, termed "stimulus-response specificity" (SRS), we developed a single-cell experimental workflow and analytical approaches based on information theory and machine learning. We found that the response specificity of macrophages is driven by combinations of specific immune genes that show low cell-to-cell heterogeneity and are targets of separate signaling pathways. The "response specificity profile," a systematic comparison of multiple stimulus-response distributions, was distinctly altered by polarizing cytokines, and it enabled an assessment of the functional state of macrophages. Indeed, the response specificity profile of peritoneal macrophages from old and obese mice showed characteristic differences, suggesting that SRS may be a basis for measuring the functional state of innate immune cells. A record of this paper's transparent peer review process is included in the supplemental information.
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Affiliation(s)
- Katherine M Sheu
- Department of Microbiology, Immunology, and Molecular Genetics, and Institute for Quantitative and Computational Biosciences, University of California, Los Angeles, 611 Charles E. Young Dr S, Los Angeles, CA 90093, USA
| | - Aditya A Guru
- Department of Microbiology, Immunology, and Molecular Genetics, and Institute for Quantitative and Computational Biosciences, University of California, Los Angeles, 611 Charles E. Young Dr S, Los Angeles, CA 90093, USA
| | - Alexander Hoffmann
- Department of Microbiology, Immunology, and Molecular Genetics, and Institute for Quantitative and Computational Biosciences, University of California, Los Angeles, 611 Charles E. Young Dr S, Los Angeles, CA 90093, USA.
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17
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Bradford SD, Witt MR, Povroznik JM, Robinson CM. Interleukin-27 impairs BCG antigen clearance and T cell stimulatory potential by neonatal dendritic cells. CURRENT RESEARCH IN MICROBIAL SCIENCES 2022; 4:100176. [DOI: 10.1016/j.crmicr.2022.100176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
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18
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Akoumianakis I, Polkinghorne M, Antoniades C. Non-canonical WNT signalling in cardiovascular disease: mechanisms and therapeutic implications. Nat Rev Cardiol 2022; 19:783-797. [PMID: 35697779 PMCID: PMC9191761 DOI: 10.1038/s41569-022-00718-5] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/25/2022] [Indexed: 12/15/2022]
Abstract
WNT signalling comprises a diverse spectrum of receptor-mediated pathways activated by a large family of WNT ligands and influencing fundamental biological processes. WNT signalling includes the β-catenin canonical pathway and the non-canonical pathways, namely the planar cell polarity and the calcium-dependent pathways. Advances over the past decade have linked non-canonical WNT signalling with key mechanisms of atherosclerosis, including oxidative stress, endothelial dysfunction, macrophage activation and vascular smooth muscle cell phenotype regulation. In addition, non-canonical WNT signalling is involved in crucial aspects of myocardial biology, from fibrosis to hypertrophy and oxidative stress. Importantly, non-canonical WNT signalling activation has complex effects in adipose tissue in the context of obesity, thereby potentially linking metabolic and vascular diseases. Tissue-specific targeting of non-canonical WNT signalling might be associated with substantial risks of off-target tumorigenesis, challenging its therapeutic potential. However, novel technologies, such as monoclonal antibodies, recombinant decoy receptors, tissue-specific gene silencing with small interfering RNAs and gene editing with CRISPR-Cas9, might enable more efficient therapeutic targeting of WNT signalling in the cardiovascular system. In this Review, we summarize the components of non-canonical WNT signalling, their links with the main mechanisms of atherosclerosis, heart failure and arrhythmias, and the rationale for targeting individual components of non-canonical WNT signalling for the treatment of cardiovascular disease.
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Affiliation(s)
- Ioannis Akoumianakis
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | - Murray Polkinghorne
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | - Charalambos Antoniades
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, UK.
- Acute Vascular Imaging Centre, Radcliffe Department of Medicine, University of Oxford, Oxford, UK.
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19
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Avital G, Kuperwaser F, Pountain AW, Lacey KA, Zwack EE, Podkowik M, Shopsin B, Torres VJ, Yanai I. The tempo and mode of gene regulatory programs during bacterial infection. Cell Rep 2022; 41:111477. [PMID: 36223751 PMCID: PMC9741813 DOI: 10.1016/j.celrep.2022.111477] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 06/10/2022] [Accepted: 09/20/2022] [Indexed: 12/14/2022] Open
Abstract
Innate immune recognition of bacterial pathogens is a key determinant of the ensuing systemic response, and host or pathogen heterogeneity in this early interaction can impact the course of infection. To gain insight into host response heterogeneity, we investigate macrophage inflammatory dynamics using primary human macrophages infected with Group B Streptococcus. Transcriptomic analysis reveals discrete cellular states within responding macrophages, one of which consists of four sub-states, reflecting inflammatory activation. Infection with six additional bacterial species-Staphylococcus aureus, Listeria monocytogenes, Enterococcus faecalis, Yersinia pseudotuberculosis, Shigella flexneri, and Salmonella enterica-recapitulates these states, though at different frequencies. We show that modulating the duration of infection and the presence of a toxin impacts inflammatory trajectory dynamics. We provide evidence for this trajectory in infected macrophages in an in vivo model of Staphylococcus aureus infection. Our cell-state analysis defines a framework for understanding inflammatory activation dynamics in response to bacterial infection.
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Affiliation(s)
- Gal Avital
- Institute for Computational Medicine, NYU Grossman School of Medicine, New York, NY, USA,These authors contributed equally
| | - Felicia Kuperwaser
- Institute for Computational Medicine, NYU Grossman School of Medicine, New York, NY, USA,These authors contributed equally
| | - Andrew W. Pountain
- Institute for Computational Medicine, NYU Grossman School of Medicine, New York, NY, USA
| | - Keenan A. Lacey
- Department of Microbiology, NYU Grossman School of Medicine, New York, NY, USA
| | - Erin E. Zwack
- Department of Microbiology, NYU Grossman School of Medicine, New York, NY, USA
| | - Magdalena Podkowik
- Department of Medicine, Division of Infectious Diseases, NYU Grossman School of Medicine, New York, NY, USA
| | - Bo Shopsin
- Department of Microbiology, NYU Grossman School of Medicine, New York, NY, USA,Department of Medicine, Division of Infectious Diseases, NYU Grossman School of Medicine, New York, NY, USA
| | - Victor J. Torres
- Department of Microbiology, NYU Grossman School of Medicine, New York, NY, USA
| | - Itai Yanai
- Institute for Computational Medicine, NYU Grossman School of Medicine, New York, NY, USA,Department of Biochemistry and Molecular Pharmacology, NYU Grossman School of Medicine, New York, NY, USA,Lead contact,Correspondence:
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20
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Ge MX, Yu Q, Li GH, Yang LQ, He Y, Li J, Kong QP. Multiple time-series expression trajectories imply dynamic functional changes during cellular senescence. Comput Struct Biotechnol J 2022; 20:4131-4137. [PMID: 36016715 PMCID: PMC9379982 DOI: 10.1016/j.csbj.2022.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 08/03/2022] [Accepted: 08/03/2022] [Indexed: 11/25/2022] Open
Abstract
Cellular senescence is a dynamic process driven by epigenetic and genetic changes. Although some transcriptomic signatures of senescent cells have been discovered, how these senescence-related signals change over time remains largely unclear. Here, we profiled the transcriptome dynamics of human dermal fibroblast (HDF) cells in successive stages of growth from proliferation to senescence. Based on time-series expression profile analysis, we discovered four trajectories (C1, C2, C3, C4) that are dynamically expressed as senescence progresses. While some genes were continuously up-regulated (C4) or down-regulated (C2) with aging, other genes did not change linearly with cell proliferation, but remained stable until entering the senescent state (C1, C3). Further analysis revealed that the four modes were enriched in different biological pathways, including regulation of cellular senescence. These findings provide a new perspective on understanding the dynamic regulatory mechanism of cellular senescence.
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21
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Thorenoor N, Floros J. The Lung Alveolar Cell (LAC) miRNome and Gene Expression Profile of the SP-A-KO Mice After Infection With and Without Rescue With Human Surfactant Protein-A2 (1A0). Front Immunol 2022; 13:854434. [PMID: 35844510 PMCID: PMC9283764 DOI: 10.3389/fimmu.2022.854434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 05/24/2022] [Indexed: 11/13/2022] Open
Abstract
Human surfactant protein (SP)-A1 and SP-A2 exhibit differential qualitative and quantitative effects on the alveolar macrophage (AM), including a differential impact on the AM miRNome. Moreover, SP-A rescue (treatment) of SP-A-knockout (KO) infected mice impoves survival. Here, we studied for the first time the role of exogenous SP-A protein treatment on the regulation of lung alveolar cell (LAC) miRNome, the miRNA-RNA targets, and gene expression of SP-A-KO infected mice of both sexes. Toward this, SP-A-KO mice of both sexes were infected with Klebsiella pneumoniae, and half of them were also treated with SP-A2 (1A0). After 6 h of infection/SP-A treatment, the expression levels and pathways of LAC miRNAs, genes, and target miRNA-mRNAs were studied in both groups. We found 1) significant differences in the LAC miRNome, genes, and miRNA-mRNA targets in terms of sex, infection, and infection plus SP-A2 (1A0) protein rescue; 2) an increase in the majority of miRNA-mRNA targets in both study groups in KO male vs. female mice and involvement of the miRNA-mRNA targets in pathways of inflammation, antiapoptosis, and cell cycle; 3) genes with significant changes to be involved in TP-53, tumor necrosis factor (TNF), and cell cycle signaling nodes; 4) when significant changes in the expression of molecules from all analyses (miRNAs, miRNA-mRNA targets, and genes) were considered, two signaling pathways, the TNF and cell cycle, referred to as “integrated pathways” were shown to be significant; 5) the cell cycle pathway to be present in all comparisons made. Because SP-A could be used therapeutically in pulmonary diseases, it is important to understand the molecules and pathways involved in response to an SP-A acute treatment. The information obtained contributes to this end and may help to gain insight especially in the case of infection.
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Affiliation(s)
- Nithyananda Thorenoor
- Department of Pediatrics, College of Medicine, The Pennsylvania State University, Hershey, PA, United States
- Department of Biochemistry and Molecular Biology, College of Medicine, The Pennsylvania State University, Hershey, PA, United States
| | - Joanna Floros
- Department of Pediatrics, College of Medicine, The Pennsylvania State University, Hershey, PA, United States
- Department of Obstetrics and Gynecology, College of Medicine, The Pennsylvania State University, Hershey, PA, United States
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22
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Glutamine Is Required for M1-like Polarization of Macrophages in Response to Mycobacterium tuberculosis Infection. mBio 2022; 13:e0127422. [PMID: 35762591 PMCID: PMC9426538 DOI: 10.1128/mbio.01274-22] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In response to Mycobacterium tuberculosis infection, macrophages mount proinflammatory and antimicrobial responses similar to those observed in M1 macrophages activated by lipopolysaccharide (LPS) and interferon gamma (IFN-γ). A metabolic reprogramming to hypoxia-inducible-factor 1 (HIF-1)-mediated uptake of glucose and its metabolism by glycolysis is required for M1-like polarization, but little is known about other metabolic programs driving the M1-like polarization during infection. We report that glutamine serves as a carbon and nitrogen source for the metabolic reprogramming to M1-like macrophages. Widely targeted metabolite screening identified an association of glutamine and/or glutamate with highly affected metabolic pathways of M1-like macrophages. Moreover, stable isotope-assisted metabolomics of U13C glutamine and U13C glucose revealed that glutamine, rather than glucose, is catabolized in both the oxidative and reductive tricarboxylic acid (TCA) cycles of M1-like macrophages, thereby generating signaling molecules that include succinate, biosynthetic precursors such as aspartate, and itaconate. U15N glutamine-tracing metabolomics further revealed participation of glutamine nitrogen in synthesis of intermediates of purine and pyrimidine metabolism plus amino acids, including aspartate. These findings were corroborated by diminished M1 polarization from chemical inhibition of glutaminase (GLS), the key enzyme in the glutaminolysis pathway, and by genetic deletion of GLS in infected macrophages. Thus, the catabolism of glutamine is an integral component of metabolic reprogramming in activating macrophages and it coordinates with elevated cytosolic glycolysis to satisfy the cellular demand for bioenergetic and biosynthetic precursors of M1-like macrophages. Knowledge of these new immunometabolic features of M1-like macrophages should advance the development of host-directed therapies for tuberculosis.
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The sodium proton exchanger NHE9 regulates phagosome maturation and bactericidal activity in macrophages. J Biol Chem 2022; 298:102150. [PMID: 35716776 PMCID: PMC9293770 DOI: 10.1016/j.jbc.2022.102150] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 06/07/2022] [Accepted: 06/13/2022] [Indexed: 11/23/2022] Open
Abstract
Acidification of phagosomes is essential for the bactericidal activity of macrophages. Targeting machinery that regulates pH within the phagosomes is a prominent strategy employed by various pathogens that have emerged as major threats to public health. Nascent phagosomes acquire the machinery for pH regulation through a graded maturation process involving fusion with endolysosomes. In addition, meticulous coordination between proton pumping and leakage mechanisms is crucial for maintaining optimal pH within the phagosome. However, relative to mechanisms involved in acidifying the phagosome lumen, little is known about proton leakage pathways in this organelle. Sodium proton transporter NHE9 is a known proton leakage pathway located on the endosomes. As phagosomes acquire proteins through fusions with endosomes during maturation, NHE9 seemed a promising candidate for regulating proton fluxes on the phagosome. Here, using genetic and biophysical approaches, we show NHE9 is an important proton leakage pathway associated with the maturing phagosome. NHE9 is highly expressed in immune cells, specifically macrophages; however, NHE9 expression is strongly downregulated upon bacterial infection. We show that compensatory ectopic NHE9 expression hinders the directed motion of phagosomes along microtubules and promotes early detachment from the microtubule tracks. As a result, these phagosomes have shorter run lengths and are not successful in reaching the lysosome. In accordance with this observation, we demonstrate that NHE9 expression levels negatively correlate with bacterial survival. Together, our findings show that NHE9 regulates lumenal pH to affect phagosome maturation, and consequently, microbicidal activity in macrophages.
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24
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IFNγ Regulates NAD+ Metabolism to Promote the Respiratory Burst in Human Monocytes. Blood Adv 2022; 6:3821-3834. [PMID: 35500221 DOI: 10.1182/bloodadvances.2021005776] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 04/12/2022] [Indexed: 11/20/2022] Open
Abstract
IFNγ is an essential and pleiotropic activator of human monocytes, but little is known about the changes in cellular metabolism required for IFNγ-induced activation. We sought to elucidate the mechanisms by which IFNγ reprograms monocyte metabolism to support its immunologic activities. We found that IFNγ increased oxygen consumption rates (OCR) in monocytes, indicative of reactive oxygen species generation by both mitochondria and NADPH oxidase. Transcriptional profiling revealed that this oxidative phenotype was driven by IFNγ-induced reprogramming of NAD+ metabolism, which is dependent on nicotinamide phosphoribosyltransferase (NAMPT)-mediated NAD+ salvage to generate NADH and NADPH for oxidation by mitochondrial complex I and NADPH oxidase, respectively. Consistent with this pathway, monocytes from patients with gain-of-function mutations in STAT1 demonstrated higher than normal OCR. Whereas chemical or genetic disruption of mitochondrial complex I (rotenone treatment or Leigh Syndrome patient monocytes) or NADPH oxidase (DPI treatment or chronic granulomatous disease (CGD) patient monocytes) reduced OCR. Interestingly, inhibition of NAMPT in healthy monocytes completely abrogated the IFNγ-induced oxygen consumption, comparable to levels observed in CGD monocytes. These data identify an IFNγ-induced, NAMPT-dependent, NAD+ salvage pathway that is critical for IFNγ activation of human monocytes.
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25
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Sheu KM, Hoffmann A. Functional Hallmarks of Healthy Macrophage Responses: Their Regulatory Basis and Disease Relevance. Annu Rev Immunol 2022; 40:295-321. [PMID: 35471841 PMCID: PMC10074967 DOI: 10.1146/annurev-immunol-101320-031555] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Macrophages are first responders for the immune system. In this role, they have both effector functions for neutralizing pathogens and sentinel functions for alerting other immune cells of diverse pathologic threats, thereby initiating and coordinating a multipronged immune response. Macrophages are distributed throughout the body-they circulate in the blood, line the mucosal membranes, reside within organs, and survey the connective tissue. Several reviews have summarized their diverse roles in different physiological scenarios and in the initiation or amplification of different pathologies. In this review, we propose that both the effector and the sentinel functions of healthy macrophages rely on three hallmark properties: response specificity, context dependence, and stimulus memory. When these hallmark properties are diminished, the macrophage's biological functions are impaired, which in turn results in increased risk for immune dysregulation, manifested by immune deficiency or autoimmunity. We review the evidence and the molecular mechanisms supporting these functional hallmarks.
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Affiliation(s)
- Katherine M Sheu
- Department of Microbiology, Immunology, and Molecular Genetics and Institute for Quantitative and Computational Biosciences, University of California, Los Angeles, California, USA;
| | - Alexander Hoffmann
- Department of Microbiology, Immunology, and Molecular Genetics and Institute for Quantitative and Computational Biosciences, University of California, Los Angeles, California, USA;
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26
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Braun ML, Tomek MB, Grünwald-Gruber C, Nguyen PQ, Bloch S, Potempa JS, Andrukhov O, Schäffer C. Shut-Down of Type IX Protein Secretion Alters the Host Immune Response to Tannerella forsythia and Porphyromonas gingivalis. Front Cell Infect Microbiol 2022; 12:835509. [PMID: 35223555 PMCID: PMC8869499 DOI: 10.3389/fcimb.2022.835509] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 01/24/2022] [Indexed: 12/26/2022] Open
Abstract
Tannerella forsythia and Porphyromonas gingivalis target distinct virulence factors bearing a structurally conserved C-terminal domain (CTD) to the type IX protein secretion system (T9SS). The T9SS comprises an outer membrane translocation complex which works in concert with a signal peptidase for CTD cleavage. Among prominent T9SS cargo linked to periodontal diseases are the TfsA and TfsB components of T. forsythia’s cell surface (S-) layer, the bacterium’s BspA surface antigen and a set of cysteine proteinases (gingipains) from P. gingivalis. To assess the overall role of the bacterial T9SS in the host response, human macrophages and human gingival fibroblasts were stimulated with T. forsythia and P. gingivalis wild-type bacteria and T9SS signal peptidase-deficient mutants defective in protein secretion, respectively. The immunostimulatory potential of these bacteria was compared by analyzing the mRNA expression levels of the pro-inflammatory mediators IL-6, IL-8, MCP-1 and TNF-α by qPCR and by measuring the production of the corresponding proteins by ELISA. Shot-gun proteomics analysis of T. forsythia and P. gingivalis outer membrane preparations confirmed that several CTD-bearing virulence factors which interact with the human immune system were depleted from the signal peptidase mutants, supportive of effective T9SS shut-down. Three and, more profoundly, 16 hours post stimulation, the T. forsythia T9SS mutant induced significantly less production of cytokines and the chemokine in human cells compared to the corresponding parent strain, while the opposite was observed for the P. gingivalis T9SS mutant. Our data indicate that T9SS shut-down translates into an altered inflammatory response in periodontal pathogens. Thus, the T9SS as a potential novel target for periodontal therapy needs further evaluation.
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Affiliation(s)
- Matthias L. Braun
- Department of NanoBiotechnology, NanoGlycobiology Unit, Universität für Bodenkultur Wien, Vienna, Austria
| | - Markus B. Tomek
- Department of NanoBiotechnology, NanoGlycobiology Unit, Universität für Bodenkultur Wien, Vienna, Austria
| | - Clemens Grünwald-Gruber
- Department of Chemistry, Institute of Biochemistry, Universität für Bodenkultur Wien, Vienna, Austria
| | - Phuong Q. Nguyen
- Competence Center for Periodontal Research, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Susanne Bloch
- Department of NanoBiotechnology, NanoGlycobiology Unit, Universität für Bodenkultur Wien, Vienna, Austria
| | - Jan S. Potempa
- Oral Health and Systemic Disease Group, University of Louisville, Louisville, KY, United States
| | - Oleh Andrukhov
- Competence Center for Periodontal Research, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
- *Correspondence: Christina Schäffer, ; Oleh Andrukhov,
| | - Christina Schäffer
- Department of NanoBiotechnology, NanoGlycobiology Unit, Universität für Bodenkultur Wien, Vienna, Austria
- *Correspondence: Christina Schäffer, ; Oleh Andrukhov,
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27
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Kiritsy MC, McCann K, Mott D, Holland SM, Behar SM, Sassetti CM, Olive AJ. Mitochondrial respiration contributes to the interferon gamma response in antigen-presenting cells. eLife 2021; 10:e65109. [PMID: 34726598 PMCID: PMC8598164 DOI: 10.7554/elife.65109] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 10/28/2021] [Indexed: 12/22/2022] Open
Abstract
The immunological synapse allows antigen-presenting cells (APCs) to convey a wide array of functionally distinct signals to T cells, which ultimately shape the immune response. The relative effect of stimulatory and inhibitory signals is influenced by the activation state of the APC, which is determined by an interplay between signal transduction and metabolic pathways. While pathways downstream of toll-like receptors rely on glycolytic metabolism for the proper expression of inflammatory mediators, little is known about the metabolic dependencies of other critical signals such as interferon gamma (IFNγ). Using CRISPR-Cas9, we performed a series of genome-wide knockout screens in murine macrophages to identify the regulators of IFNγ-inducible T cell stimulatory or inhibitory proteins MHCII, CD40, and PD-L1. Our multiscreen approach enabled us to identify novel pathways that preferentially control functionally distinct proteins. Further integration of these screening data implicated complex I of the mitochondrial respiratory chain in the expression of all three markers, and by extension the IFNγ signaling pathway. We report that the IFNγ response requires mitochondrial respiration, and APCs are unable to activate T cells upon genetic or chemical inhibition of complex I. These findings suggest a dichotomous metabolic dependency between IFNγ and toll-like receptor signaling, implicating mitochondrial function as a fulcrum of innate immunity.
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Affiliation(s)
- Michael C Kiritsy
- Department of Microbiology and Physiological Systems, University of Massachusetts Medical SchoolWorcesterUnited States
| | - Katelyn McCann
- Department of Microbiology and Physiological Systems, University of Massachusetts Medical SchoolWorcesterUnited States
- Immunopathogenesis Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of HealthBethesdaUnited States
| | - Daniel Mott
- Department of Microbiology and Physiological Systems, University of Massachusetts Medical SchoolWorcesterUnited States
| | - Steven M Holland
- Immunopathogenesis Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of HealthBethesdaUnited States
| | - Samuel M Behar
- Department of Microbiology and Physiological Systems, University of Massachusetts Medical SchoolWorcesterUnited States
| | - Christopher M Sassetti
- Department of Microbiology and Physiological Systems, University of Massachusetts Medical SchoolWorcesterUnited States
| | - Andrew J Olive
- Department of Microbiology & Molecular Genetics, College of Osteopathic Medicine, Michigan State UniversityEast LansingUnited States
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28
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Stimulus-specific responses in innate immunity: Multilayered regulatory circuits. Immunity 2021; 54:1915-1932. [PMID: 34525335 DOI: 10.1016/j.immuni.2021.08.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 03/07/2021] [Accepted: 08/16/2021] [Indexed: 12/24/2022]
Abstract
Immune sentinel cells initiate immune responses to pathogens and tissue injury and are capable of producing highly stimulus-specific responses. Insight into the mechanisms underlying such specificity has come from the identification of regulatory factors and biochemical pathways, as well as the definition of signaling circuits that enable combinatorial and temporal coding of information. Here, we review the multi-layered molecular mechanisms that underlie stimulus-specific gene expression in macrophages. We categorize components of inflammatory and anti-pathogenic signaling pathways into five layers of regulatory control and discuss unifying mechanisms determining signaling characteristics at each layer. In this context, we review mechanisms that enable combinatorial and temporal encoding of information, identify recurring regulatory motifs and principles, and present strategies for integrating experimental and computational approaches toward the understanding of signaling specificity in innate immunity.
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29
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Wu H, Wang M, Li X, Shao Y. The Metaflammatory and Immunometabolic Role of Macrophages and Microglia in Diabetic Retinopathy. Hum Cell 2021; 34:1617-1628. [PMID: 34324139 DOI: 10.1007/s13577-021-00580-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 07/17/2021] [Indexed: 12/17/2022]
Abstract
Emergent studies reveal the roles of inflammatory cells and cytokines in the development of diabetic retinopathy (DR), which is gradually portrayed as a chronic inflammatory disease accompanied by metabolic disorder. Through the pathogenesis of DR, macrophages or microglia play a critical role in the inflammation, neovascularization, and neurodegeneration of the retina. Conventionally, macrophages are generally divided into M1 and M2 phenotypes which mainly rely on glycolysis and oxidative phosphorylation, respectively. Recently, studies have found that nutrients (including glucose and lipids) and metabolites (such as lactate), can not only provide energy for cells, but also act as signaling molecules to regulate the function and fate of cells. In this review, we discussed the intrinsic correlations among the metabolic status, polarization, and function of macrophage/microglia in DR. Hyperglycemia and hyperlipidemia could induce M1-like and M2-like macrophages polarization in different phases of DR. Targeting the regulation of microglial metabolic profile might be a promising therapeutic strategy to modulate the polarization and function of macrophages/microglia, thus attenuating the progression of DR.
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Affiliation(s)
- Honglian Wu
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Medical University Eye Hospital, No. 251, Fukang Road, Nankai District, Tianjin, 300384, China.,Tianjin International Joint Research and Development Centre of Ophthalmology and Vision Science, Tianjin Medical University Eye Hospital, No. 251, Fukang Road, Nankai District, Tianjin, 300384, China.,Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, No. 251, Fukang Road, Nankai District, Tianjin, 300384, China
| | - Mengqi Wang
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Medical University Eye Hospital, No. 251, Fukang Road, Nankai District, Tianjin, 300384, China.,Tianjin International Joint Research and Development Centre of Ophthalmology and Vision Science, Tianjin Medical University Eye Hospital, No. 251, Fukang Road, Nankai District, Tianjin, 300384, China.,Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, No. 251, Fukang Road, Nankai District, Tianjin, 300384, China
| | - Xiaorong Li
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Medical University Eye Hospital, No. 251, Fukang Road, Nankai District, Tianjin, 300384, China.,Tianjin International Joint Research and Development Centre of Ophthalmology and Vision Science, Tianjin Medical University Eye Hospital, No. 251, Fukang Road, Nankai District, Tianjin, 300384, China.,Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, No. 251, Fukang Road, Nankai District, Tianjin, 300384, China
| | - Yan Shao
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Medical University Eye Hospital, No. 251, Fukang Road, Nankai District, Tianjin, 300384, China. .,Tianjin International Joint Research and Development Centre of Ophthalmology and Vision Science, Tianjin Medical University Eye Hospital, No. 251, Fukang Road, Nankai District, Tianjin, 300384, China. .,Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, No. 251, Fukang Road, Nankai District, Tianjin, 300384, China.
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30
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Yang F, Cai H, Zhang X, Sun J, Feng X, Yuan H, Zhang X, Xiao B, Li Q. An active marine halophenol derivative attenuates lipopolysaccharide-induced acute liver injury in mice by improving M2 macrophage-mediated therapy. Int Immunopharmacol 2021; 96:107676. [PMID: 34023550 DOI: 10.1016/j.intimp.2021.107676] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 04/09/2021] [Accepted: 04/11/2021] [Indexed: 12/11/2022]
Abstract
2,4',5'-Trihydroxyl-5,2'-dibromo diphenylmethanone (LM49), an active halophenol derivative synthesized by our group, which exhibits a broad spectrum of therapeutic properties, such as antioxidant and anti-inflammatory activities. In this study, we found LM49 could obviously attenuate acute liver injury induced by lipopolysaccharide (LPS) in mice by polarizing macrophages. The protective effect was described by reducing the hepatic inflammation and improving hepatic function using aspartate transaminase (AST) and alanine transaminase (ALT) assay. Further study revealed that LM49 pretreatment induced the Kupffer cells (KCs) to M2 polarization and decreased the production of inflammatory cytokines. The action mechanism in RAW 264.7 macrophages showed that LM49 could induce the activation of JAK1/STAT6 signaling pathway and the inhibition of TLR-4/NF-kB axis. Morever, LM49 also upregulated the expression of SOCS1 and FLK-4, which can promote M2 polarization by cooperating with STAT6 and inhibit M1 formation by reducing JAK1/STAT1. Our results suggested that LM49 could protect against LPS-induced acute liver injury in mice via anti-inflammatory signaling pathways and subsequent induction of M2 Kupffer cells. The results provided the first experimental evidence of active halophenols for the anti-inflammatory therapy by targeting M2 macrophages.
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Affiliation(s)
- Fan Yang
- School of Pharmaceutical Science, Shanxi Medical University, Taiyuan, Shanxi 030001, PR China
| | - HongHong Cai
- School of Pharmaceutical Science, Shanxi Medical University, Taiyuan, Shanxi 030001, PR China
| | - Xuan Zhang
- Shanxi Provincial People's Hospital, Taiyuan, Shanxi 030001, PR China
| | - Jian Sun
- Shanxi Key Laboratory of Innovative Drug for the Treatment of Serious Diseases Basing on the Chronic Inflammation,Shanxi University of Chinese Medicine, Taiyuan 030619, PR China
| | - XiuE Feng
- School of Pharmaceutical Science, Shanxi Medical University, Taiyuan, Shanxi 030001, PR China
| | - HongXia Yuan
- Shanxi Key Laboratory of Innovative Drug for the Treatment of Serious Diseases Basing on the Chronic Inflammation,Shanxi University of Chinese Medicine, Taiyuan 030619, PR China
| | - XiaoYan Zhang
- School of Pharmaceutical Science, Shanxi Medical University, Taiyuan, Shanxi 030001, PR China
| | - BaoGuo Xiao
- Shanxi Key Laboratory of Innovative Drug for the Treatment of Serious Diseases Basing on the Chronic Inflammation,Shanxi University of Chinese Medicine, Taiyuan 030619, PR China
| | - QingShan Li
- School of Pharmaceutical Science, Shanxi Medical University, Taiyuan, Shanxi 030001, PR China; Shanxi Key Laboratory of Innovative Drug for the Treatment of Serious Diseases Basing on the Chronic Inflammation,Shanxi University of Chinese Medicine, Taiyuan 030619, PR China.
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31
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Xu J, Yang N, Xie T, Yang G, Chang L, Yan D, Li T. Summary and comparison of the perforin in teleosts and mammals: A review. Scand J Immunol 2021; 94:e13047. [PMID: 33914954 DOI: 10.1111/sji.13047] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 04/14/2021] [Accepted: 04/23/2021] [Indexed: 12/18/2022]
Abstract
Perforin, a pore-forming glycoprotein, has been demonstrated to play key roles in clearing virus-infected cells and tumour cells due to its ability of forming 'pores' on the cell membranes. Additionally, perforin is also found to be associated with human diseases such as tumours, virus infections, immune rejection and some autoimmune diseases. Until now, plenty of perforin genes have been identified in vertebrates, especially the mammals and teleost fish. Conversely, vertebrate homologue of perforin gene was not identified in the invertebrates. Although recently there have been several reviews focusing on perforin and granzymes in mammals, no one highlighted the current advances of perforin in the other vertebrates. Here, in addition to mammalian perforin, the structure, evolution, tissue distribution and function of perforin in bony fish are summarized, respectively, which will allow us to gain more insights into the perforin in lower animals and the evolution of this important pore-forming protein across vertebrates.
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Affiliation(s)
- Jiahui Xu
- School of Agriculture, Ludong University, Yantai, China
| | - Ning Yang
- School of Agriculture, Ludong University, Yantai, China
| | - Ting Xie
- School of Agriculture, Ludong University, Yantai, China
| | - Guiwen Yang
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Linrui Chang
- School of Agriculture, Ludong University, Yantai, China
| | - Dongchun Yan
- School of Agriculture, Ludong University, Yantai, China
| | - Ting Li
- School of Agriculture, Ludong University, Yantai, China
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32
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Ricketts TD, Prieto-Dominguez N, Gowda PS, Ubil E. Mechanisms of Macrophage Plasticity in the Tumor Environment: Manipulating Activation State to Improve Outcomes. Front Immunol 2021; 12:642285. [PMID: 34025653 PMCID: PMC8139576 DOI: 10.3389/fimmu.2021.642285] [Citation(s) in RCA: 83] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 04/16/2021] [Indexed: 12/12/2022] Open
Abstract
Macrophages are a specialized class of innate immune cells with multifaceted roles in modulation of the inflammatory response, homeostasis, and wound healing. While developmentally derived or originating from circulating monocytes, naïve macrophages can adopt a spectrum of context-dependent activation states ranging from pro-inflammatory (classically activated, M1) to pro-wound healing (alternatively activated, M2). Tumors are known to exploit macrophage polarization states to foster a tumor-permissive milieu, particularly by skewing macrophages toward a pro-tumor (M2) phenotype. These pro-tumoral macrophages can support cancer progression by several mechanisms including immune suppression, growth factor production, promotion of angiogenesis and tissue remodeling. By preventing the adoption of this pro-tumor phenotype or reprogramming these macrophages to a more pro-inflammatory state, it may be possible to inhibit tumor growth. Here, we describe types of tumor-derived signaling that facilitate macrophage reprogramming, including paracrine signaling and activation of innate immune checkpoints. We also describe intervention strategies targeting macrophage plasticity to limit disease progression and address their implications in cancer chemo- and immunotherapy.
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Affiliation(s)
| | | | | | - Eric Ubil
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, United States
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33
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Breyer F, Härtlova A, Thurston T, Flynn HR, Chakravarty P, Janzen J, Peltier J, Heunis T, Snijders AP, Trost M, Ley SC. TPL-2 kinase induces phagosome acidification to promote macrophage killing of bacteria. EMBO J 2021; 40:e106188. [PMID: 33881780 PMCID: PMC8126920 DOI: 10.15252/embj.2020106188] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 03/11/2021] [Accepted: 03/15/2021] [Indexed: 02/05/2023] Open
Abstract
Tumour progression locus 2 (TPL‐2) kinase mediates Toll‐like receptor (TLR) activation of ERK1/2 and p38α MAP kinases in myeloid cells to modulate expression of key cytokines in innate immunity. This study identified a novel MAP kinase‐independent regulatory function for TPL‐2 in phagosome maturation, an essential process for killing of phagocytosed microbes. TPL‐2 catalytic activity was demonstrated to induce phagosome acidification and proteolysis in primary mouse and human macrophages following uptake of latex beads. Quantitative proteomics revealed that blocking TPL‐2 catalytic activity significantly altered the protein composition of phagosomes, particularly reducing the abundance of V‐ATPase proton pump subunits. Furthermore, TPL‐2 stimulated the phosphorylation of DMXL1, a regulator of V‐ATPases, to induce V‐ATPase assembly and phagosome acidification. Consistent with these results, TPL‐2 catalytic activity was required for phagosome acidification and the efficient killing of Staphylococcus aureus and Citrobacter rodentium following phagocytic uptake by macrophages. TPL‐2 therefore controls innate immune responses of macrophages to bacteria via V‐ATPase induction of phagosome maturation.
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Affiliation(s)
| | - Anetta Härtlova
- Biosciences Institute, Newcastle University, Newcastle-upon-Tyne, UK.,Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Teresa Thurston
- Department of Infectious Diseases, MRC Centre for Molecular Bacteriology & Infection, Imperial College London, London, UK
| | | | | | | | - Julien Peltier
- Biosciences Institute, Newcastle University, Newcastle-upon-Tyne, UK
| | - Tiaan Heunis
- Biosciences Institute, Newcastle University, Newcastle-upon-Tyne, UK
| | | | - Matthias Trost
- Biosciences Institute, Newcastle University, Newcastle-upon-Tyne, UK
| | - Steven C Ley
- The Francis Crick Institute, London, UK.,Department of Immunology & Inflammation, Centre for Molecular Immunology & Inflammation, Imperial College London, London, UK
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34
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Mould KJ, Moore CM, McManus SA, McCubbrey AL, McClendon JD, Griesmer CL, Henson PM, Janssen WJ. Airspace Macrophages and Monocytes Exist in Transcriptionally Distinct Subsets in Healthy Adults. Am J Respir Crit Care Med 2021; 203:946-956. [PMID: 33079572 PMCID: PMC8048748 DOI: 10.1164/rccm.202005-1989oc] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 10/15/2020] [Indexed: 01/06/2023] Open
Abstract
Rationale: Macrophages are the most abundant immune cell in the alveoli and small airways and are traditionally viewed as a homogeneous population during health. Whether distinct subsets of airspace macrophages are present in healthy humans is unknown. Single-cell RNA sequencing allows for examination of transcriptional heterogeneity between cells and between individuals. Understanding the conserved repertoire of airspace macrophages during health is essential to understanding cellular programing during disease.Objectives: We sought to determine the transcriptional heterogeneity of human cells obtained from BAL of healthy adults.Methods: Ten subjects underwent bronchoscopy with BAL. Cells from lavage were subjected to single-cell RNA sequencing. Unique cell populations and putative functions were identified. Transcriptional profiles were compared across individuals.Measurements and Main Results: We identify two novel subgroups of resident airspace macrophages-defined by proinflammatory and metallothionein gene expression profiles. We define subsets of monocyte-like cells and compare them with peripheral blood mononuclear cells. Finally, we compare global macrophage and monocyte programing between males and females.Conclusions: Healthy human airspaces contain multiple populations of myeloid cells that are highly conserved between individuals and between sexes. Resident macrophages make up the largest population and include novel subsets defined by inflammatory and metal-binding profiles. Monocyte-like cells within the airspaces are transcriptionally aligned with circulating blood cells and include a rare population defined by expression of cell-matrix interaction genes. This study is the first to delineate the conserved heterogeneity of airspace immune cells during health and identifies two previously unrecognized macrophage subsets.
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Affiliation(s)
- Kara J. Mould
- Department of Medicine
- Department of Biomedical Research, and
| | - Camille M. Moore
- Department of Pediatrics, National Jewish Health, Denver, Colorado
- Department of Medicine, University of Colorado, Aurora, Colorado; and
| | | | | | | | | | - Peter M. Henson
- Department of Biomedical Research, and
- Department of Biostatistics and Informatics, University of Colorado, Denver, Colorado
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35
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Ullmann T, Luckhardt S, Wolf M, Parnham MJ, Resch E. High-Throughput Screening for CEBPD-Modulating Compounds in THP-1-Derived Reporter Macrophages Identifies Anti-Inflammatory HDAC and BET Inhibitors. Int J Mol Sci 2021; 22:ijms22063022. [PMID: 33809617 PMCID: PMC8002291 DOI: 10.3390/ijms22063022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/07/2021] [Accepted: 03/11/2021] [Indexed: 12/25/2022] Open
Abstract
This study aimed to identify alternative anti-inflammatory compounds that modulate the activity of a relevant transcription factor, CCAAT/enhancer binding protein delta (C/EBPδ). C/EBPδ is a master regulator of inflammatory responses in macrophages (Mϕ) and is mainly regulated at the level of CEBPD gene transcription initiation. To screen for CEBPD-modulating compounds, we generated a THP-1-derived reporter cell line stably expressing secreted alkaline phosphatase (SEAP) under control of the defined CEBPD promoter (CEBPD::SEAP). A high-throughput screening of LOPAC®1280 and ENZO®774 libraries on LPS- and IFN-γ-activated THP-1 reporter Mϕ identified four epigenetically active hits: two bromodomain and extraterminal domain (BET) inhibitors, I-BET151 and Ro 11-1464, as well as two histone deacetylase (HDAC) inhibitors, SAHA and TSA. All four hits markedly and reproducibly upregulated SEAP secretion and CEBPD::SEAP mRNA expression, confirming screening assay reliability. Whereas BET inhibitors also upregulated the mRNA expression of the endogenous CEBPD, HDAC inhibitors completely abolished it. All hits displayed anti-inflammatory activity through the suppression of IL-6 and CCL2 gene expression. However, I-BET151 and HDAC inhibitors simultaneously upregulated the mRNA expression of pro-inflammatory IL-1ß. The modulation of CEBPD gene expression shown in this study contributes to our understanding of inflammatory responses in Mϕ and may offer an approach to therapy for inflammation-driven disorders.
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Affiliation(s)
- Tatjana Ullmann
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Theodor-Stern-Kai 7, 60596 Frankfurt am Main, Germany; (S.L.); (M.J.P.); (E.R.)
- Correspondence:
| | - Sonja Luckhardt
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Theodor-Stern-Kai 7, 60596 Frankfurt am Main, Germany; (S.L.); (M.J.P.); (E.R.)
| | - Markus Wolf
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Schnackenburgallee 114, 22525 Hamburg, Germany;
| | - Michael J. Parnham
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Theodor-Stern-Kai 7, 60596 Frankfurt am Main, Germany; (S.L.); (M.J.P.); (E.R.)
- EpiEndo Pharmaceuticals ehf, Eiðistorg 13-15, 170 Seltjarnarnes, Iceland
| | - Eduard Resch
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Theodor-Stern-Kai 7, 60596 Frankfurt am Main, Germany; (S.L.); (M.J.P.); (E.R.)
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36
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Lopez-Bergami P, Barbero G. The emerging role of Wnt5a in the promotion of a pro-inflammatory and immunosuppressive tumor microenvironment. Cancer Metastasis Rev 2021; 39:933-952. [PMID: 32435939 DOI: 10.1007/s10555-020-09878-7] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Wnt5a is the prototypical activator of the non-canonical Wnt pathways, and its overexpression has been implicated in the progression of several tumor types by promoting cell motility, invasion, EMT, and metastasis. Recent evidences have revealed a novel role of Wnt5a in the phosphorylation of the NF-κB subunit p65 and the activation of the NF-κB pathway in cancer cells. In this article, we review the molecular mechanisms and mediators defining a Wnt5a/NF-κB signaling pathway and propose that the aberrant expression of Wnt5a in some tumors drives a Wnt5a/NF-κB/IL-6/STAT3 positive feedback loop that amplifies the effects of Wnt5a. The evidences discussed here suggest that Wnt5a has a double effect on the tumor microenvironment. First, it activates an autocrine ROR1/Akt/p65 pathway that promotes inflammation and chemotaxis of immune cells. Then, Wnt5a activates a TLR/MyD88/p50 pathway exclusively in myelomonocytic cells promoting the synthesis of the anti-inflammatory cytokine IL-10 and a tolerogenic phenotype. As a result of these mechanisms, Wnt5a plays a negative role on immune cell function that contributes to an immunosuppressive tumor microenvironment and would contribute to resistance to immunotherapy. Finally, we summarized the development of different strategies targeting either Wnt5a or the Wnt5a receptor ROR1 that can be helpful for cancer therapy by contributing to generate a more immunostimulatory tumor microenvironment.
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Affiliation(s)
- Pablo Lopez-Bergami
- Centro de Estudios Biomédicos, Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimonides, Hidalgo 775, Buenos Aires, Argentina. .,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.
| | - Gastón Barbero
- Centro de Estudios Biomédicos, Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimonides, Hidalgo 775, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
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37
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Mishra R, Krishnamoorthy P, Kumar H. MicroRNA-30e-5p Regulates SOCS1 and SOCS3 During Bacterial Infection. Front Cell Infect Microbiol 2021; 10:604016. [PMID: 33585275 PMCID: PMC7873556 DOI: 10.3389/fcimb.2020.604016] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 12/10/2020] [Indexed: 12/13/2022] Open
Abstract
Host innate immunity is the major player against continuous microbial infection. Various pathogenic bacteria adopt the strategies to evade the immunity and show resistance toward the various established therapies. Despite the advent of many antibiotics for bacterial infections, there is a substantial need for the host-directed therapies (HDTs) to combat the infection. HDTs are recently being adopted to be useful in eradicating intracellular bacterial infection. Changing the innate immune responses of the host cells alters pathogen's ability to reside inside the cell. MicroRNAs are the small non-coding endogenous molecules and post-transcriptional regulators to target the 3'UTR of the messenger RNA. They are reported to modulate the host's immune responses during bacterial infections. Exploiting microRNAs as a therapeutic candidate in HDTs upon bacterial infection is still in its infancy. Here, initially, we re-analyzed the publicly available transcriptomic dataset of macrophages, infected with different pathogenic bacteria and identified significant genes and microRNAs common to the differential infections. We thus identified and miR-30e-5p, to be upregulated in different bacterial infections which enhances innate immunity to combat bacterial replication by targeting key negative regulators such as SOCS1 and SOCS3 of innate immune signaling pathways. Therefore, we propose miR-30e-5p as one of the potential candidates to be considered for additional clinical validation toward HDTs.
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Affiliation(s)
- Richa Mishra
- Laboratory of Immunology and Infectious Disease Biology, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal, India
| | - Pandikannan Krishnamoorthy
- Laboratory of Immunology and Infectious Disease Biology, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal, India
| | - Himanshu Kumar
- Laboratory of Immunology and Infectious Disease Biology, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal, India.,WPI Immunology, Frontier Research Centre, Osaka University, Osaka, Japan
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38
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Haydar D, Gonzalez R, Garvy BA, Garneau-Tsodikova S, Thamban Chandrika N, Bocklage TJ, Feola DJ. Myeloid arginase-1 controls excessive inflammation and modulates T cell responses in Pseudomonas aeruginosa pneumonia. Immunobiology 2020; 226:152034. [PMID: 33278710 DOI: 10.1016/j.imbio.2020.152034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 08/20/2020] [Accepted: 10/18/2020] [Indexed: 12/24/2022]
Abstract
Regulatory properties of macrophages associated with alternative activation serve to limit the exaggerated inflammatory response during pneumonia caused by Pseudomonas aeruginosa infection. Arginase-1 is an important effector of these macrophages believed to play an essential role in decreasing injury and promoting repair. We investigated the role of arginase-1 in the control of inflammatory immune responses to P. aeruginosa pneumonia in mice that exhibit different immunologic phenotypes. C57BL/6 mice with conditional knockout of the arginase-1 (Arg1) gene from myeloid cells (Arg1ΔM) or BALB/c mice treated with small molecule inhibitors of arginase were infected intratracheally with P. aeruginosa. Weight loss, mortality, bacterial clearance, and lung injury were assessed and compared, as were the characterization of immune cell populations over time post-infection. Myeloid arginase-1 deletion resulted in greater morbidity along with more severe inflammatory responses compared to littermate control mice. Arg1ΔM mice had greater numbers of neutrophils, macrophages, and lymphocytes in their airways and lymph nodes compared to littermate controls. Additionally, Arg1ΔM mice recovered from inflammatory lung injury at a significantly slower rate. Conversely, treatment of BALB/c mice with the arginase inhibitor S-(2-boronoethyl)-l-cysteine hydrochloride (BEC) did not change morbidity as defined by weight loss, but mice at day 10 post-infection treated with BEC had gained significantly more weight back than controls. Neutrophil and macrophage infiltration were similar between groups in the lung parenchyma, and neutrophil migration into the airways was reduced by BEC treatment. Differences seem to lie in the impact on T cell subset disposition. Arg1ΔM mice had increased total CD4+ T cell expansion in the lymph nodes, and increased T cell activation, IFNγ production, and IL-17 production in the lymph nodes, lung interstitium, and airways, while treatment with BEC had no impact on T cell activation or IL-17 production, but reduced the number of T cells producing IFNγ in the lungs. Lung injury scores were increased in the Arg1ΔM mice, but no differences were observed in the mice treated with pharmacologic arginase inhibitors. Overall, myeloid arginase production was demonstrated to be essential for control of damaging inflammatory responses associated with P. aeruginosa pneumonia in C57BL/6 mice, in contrast to a protective effect in the Th2-dominant BALB/c mice when arginase activity is globally inhibited.
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Affiliation(s)
- Dalia Haydar
- University of Kentucky, Department of Pharmacy Practice and Science, 789 S. Limestone Street, Lexington, KY 40536, USA.
| | - Rene Gonzalez
- University of Kentucky, Department of Pharmacy Practice and Science, 789 S. Limestone Street, Lexington, KY 40536, USA.
| | - Beth A Garvy
- University of Kentucky, College of Medicine, Department of Microbiology, Immunology and Molecular Genetics, 800 Rose Street, Lexington, KY 40536, USA.
| | - Sylvie Garneau-Tsodikova
- University of Kentucky, College of Pharmacy, Department of Pharmaceutical Sciences, 789 S. Limestone Street, Lexington, KY 40536, USA.
| | - Nishad Thamban Chandrika
- University of Kentucky, College of Pharmacy, Department of Pharmaceutical Sciences, 789 S. Limestone Street, Lexington, KY 40536, USA.
| | - Therese J Bocklage
- University of Kentucky Healthcare, Pathology and Laboratory Medicine, 800 Rose Street, Lexington, KY 40536, USA.
| | - David J Feola
- University of Kentucky, Department of Pharmacy Practice and Science, 789 S. Limestone Street, Lexington, KY 40536, USA.
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Dakroub A, A. Nasser S, Younis N, Bhagani H, Al-Dhaheri Y, Pintus G, Eid AA, El-Yazbi AF, Eid AH. Visfatin: A Possible Role in Cardiovasculo-Metabolic Disorders. Cells 2020; 9:cells9112444. [PMID: 33182523 PMCID: PMC7696687 DOI: 10.3390/cells9112444] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 10/27/2020] [Accepted: 11/02/2020] [Indexed: 02/07/2023] Open
Abstract
Visfatin/NAMPT (nicotinamide phosphoribosyltransferase) is an adipocytokine with several intriguing properties. It was first identified as pre-B-cell colony-enhancing factor but turned out to possess enzymatic functions in nicotinamide adenine dinucleotide biosynthesis, with ubiquitous expression in skeletal muscles, liver, cardiomyocytes, and brain cells. Visfatin exists in an intracellular (iNAMPT) and extracellular (eNAMPT) form. Intracellularly, visfatin/iNAMPT plays a regulatory role in NAD+ biosynthesis and thereby affects many NAD-dependent proteins such as sirtuins, PARPs, MARTs and CD38/157. Extracellularly, visfatin is associated with many hormone-like signaling pathways and activates some intracellular signaling cascades. Importantly, eNAMPT has been associated with several metabolic disorders including obesity and type 1 and 2 diabetes. In this review, a brief overview about visfatin is presented with special emphasis on its relevance to metabolic diseases. Visfatin/NAMPT appears to be a unique molecule with clinical significance with a prospective promising diagnostic, prognostic, and therapeutic applications in many cardiovasculo-metabolic disorders.
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Affiliation(s)
- Ali Dakroub
- Department of Pharmacology and Toxicology, Faculty of Medicine, American University of Beirut, Beirut P.O. Box 11-0236, Lebanon; (A.D.); (N.Y.); (H.B.); (A.F.E.-Y.)
| | - Suzanne A. Nasser
- Department of Pharmacology and Therapeutics, Beirut Arab University, Beirut P.O. Box 11-5020, Lebanon;
| | - Nour Younis
- Department of Pharmacology and Toxicology, Faculty of Medicine, American University of Beirut, Beirut P.O. Box 11-0236, Lebanon; (A.D.); (N.Y.); (H.B.); (A.F.E.-Y.)
| | - Humna Bhagani
- Department of Pharmacology and Toxicology, Faculty of Medicine, American University of Beirut, Beirut P.O. Box 11-0236, Lebanon; (A.D.); (N.Y.); (H.B.); (A.F.E.-Y.)
| | - Yusra Al-Dhaheri
- Department of Biology, College of Science, United Arab Emirates University, Al-Ain P.O. Box 15551, UAE;
| | - Gianfranco Pintus
- Department of Medical Laboratory Sciences, University of Sharjah, Sharjah P.O. Box 27272, UAE;
- Department of Biomedical Sciences, University of Sassari, Viale San Pietro 43, 07100 Sassari, Italy
| | - Assaad A. Eid
- Department of Anatomy, Cell Biology and Physiological Sciences, Faculty of Medicine, American University of Beirut, Beirut P.O. Box 11-0236, Lebanon;
| | - Ahmed F. El-Yazbi
- Department of Pharmacology and Toxicology, Faculty of Medicine, American University of Beirut, Beirut P.O. Box 11-0236, Lebanon; (A.D.); (N.Y.); (H.B.); (A.F.E.-Y.)
- Department of Pharmacology and Toxicology, Alexandria University, Alexandria 21521, El-Mesallah, Egypt
| | - Ali H. Eid
- Department of Pharmacology and Toxicology, Faculty of Medicine, American University of Beirut, Beirut P.O. Box 11-0236, Lebanon; (A.D.); (N.Y.); (H.B.); (A.F.E.-Y.)
- Department of Basic Medical Sciences, College of Medicine, QU Health, Qatar University, Doha P.O. Box 2713, Qatar
- Biomedical and Pharmaceutical Research Unit, QU Health, Qatar University, Doha P.O. Box 2713, Qatar
- Correspondence: or ; Tel.: +974-4403-3333
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40
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Pro-Inflammatory Role of AQP4 in Mice Subjected to Intrastriatal Injections of the Parkinsonogenic Toxin MPP. Cells 2020; 9:cells9112418. [PMID: 33167342 PMCID: PMC7694382 DOI: 10.3390/cells9112418] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 11/01/2020] [Accepted: 11/02/2020] [Indexed: 12/28/2022] Open
Abstract
Aquaporin-4 (AQP4) is critically involved in brain water and volume homeostasis and has been implicated in a wide range of pathological conditions. Notably, evidence has been accrued to suggest that AQP4 plays a proinflammatory role by promoting release of astrocytic cytokines that activate microglia and other astrocytes. Neuroinflammation is a hallmark of Parkinson’s disease (PD), and we have previously shown that astrocytes in substantia nigra (SN) are enriched in AQP4 relative to cortical astrocytes, and that their complement of AQP4 is further increased following treatment with the parkinsonogenic toxin MPTP (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine). Here, we investigated the effect of Aqp4 deletion on microglial activation in mice subjected to unilateral intrastriatal injection of 1-methyl-4-phenylpyridinium (MPP+, the toxic metabolite of MPTP). Our results show that MPP+ injections lead to a pronounced increase in the expression level of microglial activating genes in the ventral mesencephalon of wild type (WT) mice, but not Aqp4−/− mice. We also show, in WT mice, that MPP+ injections cause an upregulation of nigral AQP4 and swelling of astrocytic endfeet. These findings are consistent with the idea that AQP4 plays a pro-inflammatory role in Parkinson’s disease, secondary to the dysregulation of astrocytic volume homeostasis.
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41
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Kim MJ, You YO, Kang JY, Kim HJ, Kang MS. Weissella cibaria CMU exerts an anti‑inflammatory effect by inhibiting Aggregatibacter actinomycetemcomitans‑induced NF‑κB activation in macrophages. Mol Med Rep 2020; 22:4143-4150. [PMID: 33000248 PMCID: PMC7533440 DOI: 10.3892/mmr.2020.11512] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 05/15/2020] [Indexed: 12/25/2022] Open
Abstract
Periodontitis is a chronic inflammatory disease caused by various periodontal pathogens. Weissella cibaria CMU (oraCMU) is a probiotic that promotes oral health. However, its anti‑inflammatory effects against periodontal pathogens have not yet been investigated. The present study evaluated the anti‑inflammatory effects of live oraCMU against stimulation with the formalin‑inactivated periodontal pathogen Aggregatibacter actinomycetemcomitans in RAW 264.7 macrophages. Cell viability was analyzed by the MTS assay in a dose‑dependent manner (at multiplicities of infection of 0.1, 1, 10, 100 and 1,000). Nitric oxide (NO) was monitored using the Griess test. The mRNA expression of proinflammatory cytokines such as interleukin (IL)1β and IL6 was assessed by reverse transcription‑quantitative PCR. Western blotting was used to examine the effects of oraCMU on the phosphorylation of NF‑κB inhibitor α (IκBα) and IκBα kinase (IKK), the nuclear translocation of the NF‑κB subunit p65 and the expression of inducible NO synthase (iNOS). Live oraCMU had no cytotoxic effects on RAW 264.7 macrophages. In A. actinomycetemcomitans‑stimulated RAW 264.7 macrophages, oraCMU reduced NO production by suppressing iNOS expression and downregulating the mRNA expression of proinflammatory cytokines in a dose‑dependent manner. IKK phosphorylation and IκBα degradation were dose‑dependently inhibited by oraCMU and the nuclear translocation of p65 via the canonical NF‑κB pathway was simultaneously reduced. The results indicated that oraCMU possessed anti‑inflammatory activity associated with the inhibition of NF‑κB signal activation in response to periodontal pathogens. This suggests that oraCMU is a beneficial anti‑inflammatory probiotic that can aid in the maintenance of oral health.
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Affiliation(s)
- Min-Jeong Kim
- Department of Convergence Technology for Food Industry and Dental Research Institute, School of Dentistry, Wonkwang University, Iksan, Jellabukdo 54538, Republic of Korea
| | - Yong-Ouk You
- Department of Oral Biochemistry, School of Dentistry, Wonkwang University, Iksan, Jellabukdo 54538, Republic of Korea
| | - Joo-Yi Kang
- Department of Oral Biochemistry, School of Dentistry, Wonkwang University, Iksan, Jellabukdo 54538, Republic of Korea
| | - Hyun-Jin Kim
- Department of Oral Anatomy and Dental Research Institute, School of Dentistry, Wonkwang University, Iksan, Jellabukdo 54538, Republic of Korea
| | - Mi-Sun Kang
- Research and Development Department, Research Institute, OraPharm Inc., Seoul 04782, Republic of Korea
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42
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Bissonnette EY, Lauzon-Joset JF, Debley JS, Ziegler SF. Cross-Talk Between Alveolar Macrophages and Lung Epithelial Cells is Essential to Maintain Lung Homeostasis. Front Immunol 2020; 11:583042. [PMID: 33178214 PMCID: PMC7593577 DOI: 10.3389/fimmu.2020.583042] [Citation(s) in RCA: 109] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 09/30/2020] [Indexed: 12/22/2022] Open
Abstract
The main function of the lung is to perform gas exchange while maintaining lung homeostasis despite environmental pathogenic and non-pathogenic elements contained in inhaled air. Resident cells must keep lung homeostasis and eliminate pathogens by inducing protective immune response and silently remove innocuous particles. Which lung cell type is crucial for this function is still subject to debate, with reports favoring either alveolar macrophages (AMs) or lung epithelial cells (ECs) including airway and alveolar ECs. AMs are the main immune cells in the lung in steady-state and their function is mainly to dampen inflammatory responses. In addition, they phagocytose inhaled particles and apoptotic cells and can initiate and resolve inflammatory responses to pathogens. Although AMs release a plethora of mediators that modulate immune responses, ECs also play an essential role as they are more than just a physical barrier. They produce anti-microbial peptides and can secrete a variety of mediators that can modulate immune responses and AM functions. Furthermore, ECs can maintain AMs in a quiescent state by expressing anti-inflammatory membrane proteins such as CD200. Thus, AMs and ECs are both very important to maintain lung homeostasis and have to coordinate their action to protect the organism against infection. Thus, AMs and lung ECs communicate with each other using different mechanisms including mediators, membrane glycoproteins and their receptors, gap junction channels, and extracellular vesicles. This review will revisit characteristics and functions of AMs and lung ECs as well as different communication mechanisms these cells utilize to maintain lung immune balance and response to pathogens. A better understanding of the cross-talk between AMs and lung ECs may help develop new therapeutic strategies for lung pathogenesis.
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Affiliation(s)
- Elyse Y Bissonnette
- Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Department of Medicine, Université Laval, Quebec City, QC, Canada
| | - Jean-François Lauzon-Joset
- Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Department of Medicine, Université Laval, Quebec City, QC, Canada
| | - Jason S Debley
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, WA, United States
| | - Steven F Ziegler
- Department of Immunology, Benaroya Research Institute, University of Washington School of Medicine, Seattle, WA, United States
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43
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Kumar A, Singh PK, Zhang K, Kumar A. Toll-like receptor 2 (TLR2) engages endoplasmic reticulum stress sensor IRE1α to regulate retinal innate responses in Staphylococcus aureus endophthalmitis. FASEB J 2020; 34:13826-13838. [PMID: 32813318 PMCID: PMC8033405 DOI: 10.1096/fj.202001393r] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/31/2020] [Accepted: 08/05/2020] [Indexed: 12/18/2022]
Abstract
Endoplasmic reticulum (ER) stress response has been implicated in a variety of pathophysiological conditions, including infectious and inflammatory diseases. However, its contribution in ocular bacterial infections, such as endophthalmitis, which often cause blindness is not known. Here, using a mouse model of Staphylococcus (S.) aureus endophthalmitis, our study demonstrates the induction of inositol-requiring enzyme 1α (IRE1α) and splicing of X-box binding protein-1 (Xbp1) branch of the ER-stress pathway, but not the other classical ER stress sensors. Interestingly, S aureus-induced ER stress response was found to be dependent on Toll-like receptor 2 (TLR2), as evident by reduced expression of IRE1α and Xbp1 mRNA splicing in TLR2 knockout mouse retina. Pharmacological inhibition of IRE1α using 4µ8C or experiments utilizing IRE1α-/- macrophages revealed that IRE1α positively regulates S aureus-induced inflammatory responses. Moreover, IRE1α inhibition attenuated S aureus-triggered NF-κB, p38, and ERK pathways activation and cells treated with these pathway-specific inhibitors reduced Xbp1 splicing, suggesting a positive feedback inhibition. In vivo, inhibition of IRE1α diminished the intraocular inflammation and reduced PMN infiltration in mouse eyes, but, increased the bacterial burden and caused more retinal tissue damage. These results revealed a critical role of the IRE1α/XBP1 pathway as a regulator of TLR2-mediated protective innate immune responses in S aureus-induced endophthalmitis.
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Affiliation(s)
- Ajay Kumar
- Department of Ophthalmology, Visual and Anatomical Sciences/ Kresge Eye Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Pawan Kumar Singh
- Department of Ophthalmology, Visual and Anatomical Sciences/ Kresge Eye Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Kezhong Zhang
- Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI, USA
- Department of Biochemistry, Microbiology, and Immunology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Ashok Kumar
- Department of Ophthalmology, Visual and Anatomical Sciences/ Kresge Eye Institute, Wayne State University School of Medicine, Detroit, MI, USA
- Department of Biochemistry, Microbiology, and Immunology, Wayne State University School of Medicine, Detroit, MI, USA
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Barbero AM, Trotta A, Genoula M, Pino REHD, Estermann MA, Celano J, Fuentes F, García VE, Balboa L, Barrionuevo P, Pasquinelli V. SLAMF1 signaling induces Mycobacterium tuberculosis uptake leading to endolysosomal maturation in human macrophages. J Leukoc Biol 2020; 109:257-273. [PMID: 32991756 DOI: 10.1002/jlb.4ma0820-655rr] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 08/19/2020] [Accepted: 09/02/2020] [Indexed: 01/18/2023] Open
Abstract
Tuberculosis dates back to ancient times but it is not a problem of the past. Each year, millions of people die from tuberculosis. After inhalation of infectious droplet nuclei, Mycobacterium tuberculosis reaches the lungs where it can manipulate the immune system and survive within host macrophages, establishing a persistent infection. The signaling lymphocytic activation molecule family member 1 (SLAMF1) is a self-ligand receptor that can internalize gram-negative bacteria and regulate macrophages' phagosomal functions. In tuberculosis, SLAMF1 promotes Th1-protective responses. In this work, we studied the role of SLAMF1 on macrophages' functions during M. tuberculosis infection. Our results showed that both M. tuberculosis and IFN-γ stimulation induce SLAMF1 expression in macrophages from healthy donor and Tohoku Hospital Pediatrcs-1 cells. Costimulation through SLAMF1 with an agonistic antibody resulted in an enhanced internalization of M. tuberculosis by macrophages. Interestingly, we found that SLAMF1 interacts with M. tuberculosis and colocalizes with the bacteria and with early and late endosomes/lysosomes markers (EEA1 and LAMP2), suggesting that SLAMF1 recognize M. tuberculosis and participate in the endolysosomal maturation process. Notably, increased levels of SLAMF1 were detected in CD14 cells from pleural effusions of tuberculosis patients, indicating that SLAMF1 might have an active function at the site of infection. Taken together, our results provide evidence that SLAMF1 improves the uptake of M. tuberculosis by human monocyte-derived macrophages.
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Affiliation(s)
- Angela María Barbero
- Center for Basic and Applied Research (CIBA), National University of the Northwest of the Province of Buenos Aires (UNNOBA), B6000DNE, Buenos Aires, Argentina.,Center for Research and Transfers of the Northwest of the Province of Buenos Aires (CIT NOBA), UNNOBA-National University of San Antonio de Areco (UNSAdA) - National Scientific and Technical Research Council (CONICET), Buenos Aires, Argentina
| | - Aldana Trotta
- Institute of Experimental Medicine (CONICET-National Academy of Medicine), C1425ASU, Buenos Aires, Argentina
| | - Melanie Genoula
- Institute of Experimental Medicine (CONICET-National Academy of Medicine), C1425ASU, Buenos Aires, Argentina
| | - Rodrigo Emanuel Hernández Del Pino
- Center for Basic and Applied Research (CIBA), National University of the Northwest of the Province of Buenos Aires (UNNOBA), B6000DNE, Buenos Aires, Argentina.,Center for Research and Transfers of the Northwest of the Province of Buenos Aires (CIT NOBA), UNNOBA-National University of San Antonio de Areco (UNSAdA) - National Scientific and Technical Research Council (CONICET), Buenos Aires, Argentina
| | - Martín Andrés Estermann
- Center for Basic and Applied Research (CIBA), National University of the Northwest of the Province of Buenos Aires (UNNOBA), B6000DNE, Buenos Aires, Argentina.,Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Victoria, Clayton, Australia
| | - Josefina Celano
- Center for Basic and Applied Research (CIBA), National University of the Northwest of the Province of Buenos Aires (UNNOBA), B6000DNE, Buenos Aires, Argentina
| | - Federico Fuentes
- Institute of Experimental Medicine (CONICET-National Academy of Medicine), C1425ASU, Buenos Aires, Argentina
| | - Verónica Edith García
- CONICET-University of Buenos Aires, Institute of Biological Chemistry of Exact and Natural Sciences (IQUIBICEN), C1428EHA, Buenos Aires, Argentina.,University of Buenos Aires, School of Sciences, Department of Biological Chemistry, C1428EHA, Buenos Aires, Argentina
| | - Luciana Balboa
- Institute of Experimental Medicine (CONICET-National Academy of Medicine), C1425ASU, Buenos Aires, Argentina
| | - Paula Barrionuevo
- Institute of Experimental Medicine (CONICET-National Academy of Medicine), C1425ASU, Buenos Aires, Argentina
| | - Virginia Pasquinelli
- Center for Basic and Applied Research (CIBA), National University of the Northwest of the Province of Buenos Aires (UNNOBA), B6000DNE, Buenos Aires, Argentina.,Center for Research and Transfers of the Northwest of the Province of Buenos Aires (CIT NOBA), UNNOBA-National University of San Antonio de Areco (UNSAdA) - National Scientific and Technical Research Council (CONICET), Buenos Aires, Argentina
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45
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Cheah JUJ, Low HB, Zhang Y, Yong Kah JC. Light-independent M1 macrophage polarization by photosensitizer-loaded protein corona on gold nanorods. Nanomedicine (Lond) 2020; 15:2329-2344. [PMID: 32945247 DOI: 10.2217/nnm-2020-0249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: To establish a light-independent functionality of gold nanorods (AuNRs) with a human serum (HS) protein corona loaded with photosensitizer Chlorin e6 (AuNR-HS-Ce6) in M1 polarization of macrophages. Methods: RT-qPCR and ELISA were used to determine gene and protein expression, respectively. Uptake of AuNR-HS-Ce6 was determined via flow cytometry, inductively coupled plasma mass spectrometry and fluorescence microscopy. Cell viability was determined using PrestoBlue® cell viability assay. Results: An increase in M1 gene and protein expression was observed in AuNR-HS-Ce6-treated macrophages. Delivery of high Ce6 payload via AuNR-HS-Ce6 was the primary contributor toward M1 polarization. Finally, DLD-1 cells treated with conditioned media from AuNR-HS-Ce6-treated macrophages showed significantly reduced proliferation. Conclusion: Our study suggests an immunomodulatory potential of Ce6 in inducing light-independent M1 polarization outside of its role as a photosensitizer.
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Affiliation(s)
- Joshua U-Jin Cheah
- NUS Graduate School for Integrative Sciences & Engineering, National University of Singapore, 21 Lower Kent Ridge, University Hall, Tan Chin Tuan Wing, #04-02, 119077, Singapore
| | - Heng Boon Low
- Department of Microbiology & Immunology, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Blk MD4, Level 3, 117545, Singapore.,Immunology Programme, Life Sciences Institute, National University of Singapore, 28 Medical Drive, Centre for Life Sciences, Level 3, 117456, Singapore
| | - Yongliang Zhang
- Department of Microbiology & Immunology, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Blk MD4, Level 3, 117545, Singapore.,Immunology Programme, Life Sciences Institute, National University of Singapore, 28 Medical Drive, Centre for Life Sciences, Level 3, 117456, Singapore
| | - James Chen Yong Kah
- NUS Graduate School for Integrative Sciences & Engineering, National University of Singapore, 21 Lower Kent Ridge, University Hall, Tan Chin Tuan Wing, #04-02, 119077, Singapore.,Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, Blk E4, #04-08, 117583, Singapore
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Li X, Cho B, Martin R, Seu M, Zhang C, Zhou Z, Choi JS, Jiang X, Chen L, Walia G, Yan J, Callanan M, Liu H, Colbert K, Morrissette-McAlmon J, Grayson W, Reddy S, Sacks JM, Mao HQ. Nanofiber-hydrogel composite-mediated angiogenesis for soft tissue reconstruction. Sci Transl Med 2020; 11:11/490/eaau6210. [PMID: 31043572 DOI: 10.1126/scitranslmed.aau6210] [Citation(s) in RCA: 144] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 03/15/2019] [Indexed: 12/22/2022]
Abstract
Soft tissue losses from tumor removal, trauma, aging, and congenital malformation affect millions of people each year. Existing options for soft tissue restoration have several drawbacks: Surgical options such as the use of autologous tissue flaps lead to donor site defects, prosthetic implants are prone to foreign body response leading to fibrosis, and fat grafting and dermal fillers are limited to small-volume defects and only provide transient volume restoration. In addition, large-volume fat grafting and other tissue-engineering attempts are hampered by poor vascular ingrowth. Currently, there are no off-the-shelf materials that can fill the volume lost in soft tissue defects while promoting early angiogenesis. Here, we report a nanofiber-hydrogel composite that addresses these issues. By incorporating interfacial bonding between electrospun poly(ε-caprolactone) fibers and a hyaluronic acid hydrogel network, we generated a composite that mimics the microarchitecture and mechanical properties of soft tissue extracellular matrix. Upon subcutaneous injection in a rat model, this composite permitted infiltration of host macrophages and conditioned them into the pro-regenerative phenotype. By secreting pro-angiogenic cytokines and growth factors, these polarized macrophages enabled gradual remodeling and replacement of the composite with vascularized soft tissue. Such host cell infiltration and angiogenesis were also observed in a rabbit model for repairing a soft tissue defect filled with the composite. This injectable nanofiber-hydrogel composite augments native tissue regenerative responses, thus enabling durable soft tissue restoration outcomes.
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Affiliation(s)
- Xiaowei Li
- Translational Tissue Engineering Center, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA.,Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA.,Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Brian Cho
- Department of Plastic and Reconstructive Surgery, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA
| | - Russell Martin
- Translational Tissue Engineering Center, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA.,Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA.,Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Michelle Seu
- Department of Plastic and Reconstructive Surgery, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA
| | - Chi Zhang
- Translational Tissue Engineering Center, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA.,Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA.,Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Zhengbing Zhou
- Translational Tissue Engineering Center, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA.,Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA.,Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Ji Suk Choi
- Translational Tissue Engineering Center, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA.,Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA.,Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Xuesong Jiang
- Translational Tissue Engineering Center, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA.,Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA.,Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Long Chen
- Translational Tissue Engineering Center, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA.,Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA.,Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Gurjot Walia
- Department of Plastic and Reconstructive Surgery, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA
| | - Jerry Yan
- Department of Biomedical Engineering, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Megan Callanan
- Department of Biomedical Engineering, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Huanhuan Liu
- Translational Tissue Engineering Center, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA.,Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA.,Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Kevin Colbert
- Translational Tissue Engineering Center, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA.,Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Justin Morrissette-McAlmon
- Translational Tissue Engineering Center, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA.,Department of Biomedical Engineering, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Warren Grayson
- Translational Tissue Engineering Center, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA.,Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA.,Department of Biomedical Engineering, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Sashank Reddy
- Department of Plastic and Reconstructive Surgery, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA.
| | - Justin M Sacks
- Department of Plastic and Reconstructive Surgery, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA.
| | - Hai-Quan Mao
- Translational Tissue Engineering Center, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA. .,Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA.,Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA.,Department of Biomedical Engineering, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
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47
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Ahmed I, Ismail N. M1 and M2 Macrophages Polarization via mTORC1 Influences Innate Immunity and Outcome of Ehrlichia Infection. JOURNAL OF CELLULAR IMMUNOLOGY 2020; 2:108-115. [PMID: 32719831 DOI: 10.33696/immunology.2.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Human monocytic ehrlichiosis (HME) is an emerging life-threatening tick-borne disease caused by the obligate intracellular bacterium Ehrlichia chaffeensis. HME is often presented as a nonspecific flu-like illness characterized by presence of fever, headache, malaise, and myalgia. However, in some cases the disease can evolve to a severe form, which is commonly marked by acute liver injury followed by multi-organ failure and toxic shock-like syndrome [1-3]. Macrophages and monocytes are the major target cells for Ehrlichia, although this bacterium can infect other cell types such as hepatocytes and endothelial cells [4]. In this article, we discuss how macrophages polarization to M1 or M2 phenotypes dictate the severity of ehrlichiosis and the outcome of infection. We will also discuss the potential mechanisms that regulate such polarization.
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Affiliation(s)
- Ibrahim Ahmed
- Department of Pathology, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Nahed Ismail
- Department of Pathology, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
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48
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Thorenoor N, Kawasawa YI, Gandhi CK, Floros J. Sex-Specific Regulation of Gene Expression Networks by Surfactant Protein A (SP-A) Variants in Alveolar Macrophages in Response to Klebsiella pneumoniae. Front Immunol 2020; 11:1290. [PMID: 32670284 PMCID: PMC7326812 DOI: 10.3389/fimmu.2020.01290] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 05/21/2020] [Indexed: 01/01/2023] Open
Abstract
Surfactant protein A (SP-A) in addition to its surfactant-related functions interacts with alveolar macrophages (AM), the guardian cells of innate immunity in the lungs, and regulates many of its functions under basal condition and in response to various pressures, such as infection and oxidative stress. The human SP-A locus consists of two functional genes, SFTPA1 and SFTPA2, and one pseudogene. The functional genes encode human SP-A1 and SP-A2 proteins, respectively, and each has been identified with several genetic variants. SP-A variants differ in their ability to regulate lung function mechanics and survival in response to bacterial infection. Here, we investigated the effect of hSP-A variants on the AM gene expression profile in response to Klebsiella pneumoniae infection. We used four humanized transgenic (hTG) mice that each carried SP-A1 (6A2, 6A4) or SP-A2 (1A0, 1A3), and KO. AM gene expression profiling was performed after 6 h post-infection. We found: (a) significant sex differences in the expression of AM genes; (b) in response to infection, 858 (KO), 196 (6A2), 494 (6A4), 276 (1A0), and 397 (1A3) genes were identified (P < 0.05) and some of these were differentially expressed with ≥2 fold, specific to either males or females; (c) significant SP-A1 and SP-A2 variant-specific differences in AM gene expression; (d) via Ingenuity Pathway Analysis (IPA), key pathways and molecules were identified that had direct interaction with TP53, TNF, and cell cycle signaling nodes; (e) of the three pathways (TNF, TP-53, and cell cycle signaling nodes) studied here, all variants except SP-A2 (1A3) female, showed significance for at least 2 of these pathways, and KO male showed significance for all three pathways; (f) validation of key molecules exhibited variant-specific significant differences in the expression between sexes and a similarity in gene expression profile was observed between KO and SP-A1. These results reveal for the first time a large number of biologically relevant functional pathways influenced in a sex-specific manner by SP-A variants in response to infection. These data may assist in studying molecular mechanisms of SP-A-mediated AM gene regulation and potentially identify novel therapeutic targets for K. pneumoniae infection.
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Affiliation(s)
- Nithyananda Thorenoor
- Center for Host Defense, Inflammation, and Lung Disease (CHILD) Research, Department of Pediatrics, The Pennsylvania State University College of Medicine, Hershey, PA, United States.,Biochemistry & Molecular Biology, The Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Yuka Imamura Kawasawa
- Pharmacology & Biochemistry & Molecular Biology, Institute for Personalized Medicine, The Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Chintan K Gandhi
- Center for Host Defense, Inflammation, and Lung Disease (CHILD) Research, Department of Pediatrics, The Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Joanna Floros
- Center for Host Defense, Inflammation, and Lung Disease (CHILD) Research, Department of Pediatrics, The Pennsylvania State University College of Medicine, Hershey, PA, United States.,Obstetrics & Gynecology, The Pennsylvania State University College of Medicine, Hershey, PA, United States
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49
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Sun R, Abraham C. IL23 Promotes Antimicrobial Pathways in Human Macrophages, Which Are Reduced With the IBD-Protective IL23R R381Q Variant. Cell Mol Gastroenterol Hepatol 2020; 10:673-697. [PMID: 32474165 PMCID: PMC7490566 DOI: 10.1016/j.jcmgh.2020.05.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 05/14/2020] [Accepted: 05/18/2020] [Indexed: 12/13/2022]
Abstract
BACKGROUND & AIMS Interleukin (IL)23 is a major contributor to inflammatory bowel disease (IBD) pathogenesis and is being pursued as a therapeutic target, both through targeting IL23 alone or in combination with IL12. Unexpected trial outcomes highlight the importance of understanding the cell types through which IL23 regulates immune responses, and how IL23 and IL12 compare in these responses. Macrophages are key players in IBD, and IL23 recently was found to promote inflammatory outcomes in human macrophages. This raises the possibility that IL23 may be required for additional essential macrophage functions, in particular microbial clearance, such that either blocking the IL23 pathway or the IL23R-R381Q IBD-protective variant may reduce macrophage-mediated microbial clearance. METHODS We analyzed protein expression, signaling, bacterial uptake, and intracellular bacterial clearance in human monocyte-derived macrophages through Western blot, flow cytometry, and gentamicin protection. RESULTS Autocrine/paracrine IL23 was critical for optimal levels of pattern-recognition-receptor (PRR)-induced intracellular bacterial clearance in human macrophages. Mechanisms regulated by IL23 included induction of pyruvate dehydrogenase kinase 1-dependent bacterial uptake, and up-regulation of reactive oxygen species through nicotinamide adenine dinucleotide phosphate oxidase members, nitric oxide synthase 2, and autophagy through ATG5 and ATG16L1. Complementing these pathways in IL23R-deficient macrophages restored PRR-induced bacterial uptake and clearance. Janus kinase 2, TYK2, and STAT3 were required for IL23-induced mechanisms. IL23 and IL12 induced antimicrobial pathways to similar levels in human macrophages. Relative to IL23R-R381, transfected IL23R-Q381, or monocyte-derived macrophages from IL23R-Q381 carriers showed reduced bacterial uptake and clearance. CONCLUSIONS We identify that autocrine/paracrine IL23 is required for optimal PRR-enhanced macrophage bacterial uptake and intracellular bacterial clearance, define mechanisms regulating IL23R-induced bacterial clearance, and determine how the IBD-protective IL23R-R381Q variant modulates these processes.
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Affiliation(s)
- Rui Sun
- Section of Digestive Diseases, Department of Internal Medicine, Yale University, New Haven, Connecticut
| | - Clara Abraham
- Section of Digestive Diseases, Department of Internal Medicine, Yale University, New Haven, Connecticut.
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50
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Pathogenic Biohacking: Induction, Modulation and Subversion of Host Transcriptional Responses by Listeria monocytogenes. Toxins (Basel) 2020; 12:toxins12050294. [PMID: 32380645 PMCID: PMC7290974 DOI: 10.3390/toxins12050294] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/01/2020] [Accepted: 05/03/2020] [Indexed: 12/23/2022] Open
Abstract
During infection, the foodborne bacterial pathogen Listeria monocytogenes dynamically influences the gene expression profile of host cells. Infection-induced transcriptional changes are a typical feature of the host-response to bacteria and contribute to the activation of protective genes such as inflammatory cytokines. However, by using specialized virulence factors, bacterial pathogens can target signaling pathways, transcription factors, and epigenetic mechanisms to alter host gene expression, thereby reprogramming the response to infection. Therefore, the transcriptional profile that is established in the host is delicately balanced between antibacterial responses and pathogenesis, where any change in host gene expression might significantly influence the outcome of infection. In this review, we discuss the known transcriptional and epigenetic processes that are engaged during Listeria monocytogenes infection, the virulence factors that can remodel them, and the impact these processes have on the outcome of infection.
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