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Inholz K, Anderl JL, Klawitter M, Goebel H, Maurits E, Kirk CJ, Fan RA, Basler M. Proteasome composition in immune cells implies special immune‐cell‐specific immunoproteasome function. Eur J Immunol 2024; 54:e2350613. [PMID: 38458995 DOI: 10.1002/eji.202350613] [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: 06/16/2023] [Revised: 12/11/2023] [Accepted: 12/12/2023] [Indexed: 03/10/2024]
Abstract
Immunoproteasomes are a special class of proteasomes, which can be induced with IFN-γ in an inflammatory environment. In recent years, it became evident that certain immune cell types constitutively express high levels of immunoproteasomes. However, information regarding the basal expression of proteolytically active immunoproteasome subunits in different types of immune cells is still rare. Hence, we quantified standard proteasome subunits (β1c, β2c, β5c) and immunoproteasome subunits (LMP2, MECL-1, LMP7) in the major murine (CD4+ T cells, CD8+ T cells, CD19+ B cells, CD11c+ dendritic cells, CD49d+ natural killer cells, Ly-6G+ neutrophils) and human immune cell (CD4+ T cells, CD8+ T cells, CD19+ B cells, CD1c+CD141+ myeloid dendritic cells, CD56+ natural killer cells, granulocytes) subsets. The different human immune cell types were isolated from peripheral blood and the murine immune cell subsets from spleen. We found that proteasomes of most immune cell subsets mainly consist of immunoproteasome subunits. Our data will serve as a reference and guideline for immunoproteasome expression and imply a special role of immunoproteasomes in immune cells.
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Affiliation(s)
- Katharina Inholz
- Biotechnology Institute Thurgau (BITg) at the University of Konstanz, Kreuzlingen, Switzerland
- Division of Immunology, Department of Biology, University of Konstanz, Konstanz, Germany
| | - Janet L Anderl
- Department of Research, Kezar Life Sciences, South San Francisco, California, USA
| | - Moritz Klawitter
- Division of Immunology, Department of Biology, University of Konstanz, Konstanz, Germany
| | - Heike Goebel
- Division of Immunology, Department of Biology, University of Konstanz, Konstanz, Germany
| | - Elmer Maurits
- Leiden Institute of Chemistry, Leiden University, Leiden, the Netherlands
| | - Christopher J Kirk
- Department of Research, Kezar Life Sciences, South San Francisco, California, USA
| | - R Andrea Fan
- Department of Research, Kezar Life Sciences, South San Francisco, California, USA
| | - Michael Basler
- Biotechnology Institute Thurgau (BITg) at the University of Konstanz, Kreuzlingen, Switzerland
- Division of Immunology, Department of Biology, University of Konstanz, Konstanz, Germany
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Liu Q, Shen J, Wang J, Xia J, Yin J, Cheng G, Qian X, Jiang Y, Ge X, Wang Q. PR-957 retards rheumatoid arthritis progression and inflammation by inhibiting LMP7-mediated CD4 + T cell imbalance. Int Immunopharmacol 2023; 124:110860. [PMID: 37716163 DOI: 10.1016/j.intimp.2023.110860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/10/2023] [Accepted: 08/23/2023] [Indexed: 09/18/2023]
Abstract
OBJECTIVE Low molecular mass polypeptide 7 (LMP7) is an immunoproteasome subunit that regulates T cell amplification, differentiation, and inflammation and is involved in rheumatoid arthritis (RA) progression. This study intended to apply PR-957 (an anti-LMP7 agent) for RA treatment in vitro and in vivo and evaluate its interaction with LMP7-mediated CD4+ T cell imbalance. METHODS Peripheral blood mononuclear cells (PBMCs) were obtained from 30 RA patients and 30 healthy controls. RA fibroblast-like synoviocytes (RA-FLSs) and CD4+ T cells were isolated from RA patients and then cocultured with PR-957 and/or LMP7 overexpression adenovirus (Ad-LMP7). Collagen-induced arthritis (CIA) mice were constructed and then treated with PR-957 and/or Ad-LMP7. RESULTS LMP7 was higher in RA patients (versus healthy controls) and positively correlated with T helper (Th)1 cells, the Th1/Th2 ratio, Th17 cells, and the Th17/Treg ratio but not with Th2 or T regulatory (Treg) cells. PR-957 reduced Th1 and Th17 cells but increased Th2 and Treg cells in RA-CD4+ T cells, and this effect was partially reversed by Ad-LMP7 transfection. Interestingly, when cocultured with RA-CD4+ T cells, PR-957 increased RA-FLS apoptosis and decreased its invasive ability, viability, and inflammation, as suggested by IL-6, CCL2, MMP1, and MMP3; however, these phenomena were weakened in RA-FLSs without RA-CD4+ T cell coculture. In addition, Ad-LMP7 transfection attenuated the above effects of PR-957. In CIA mice, PR-957 decreased the arthritis score, synovial hyperproliferation and articular injury, inflammation in the synovium and serum, and the imbalance of Th1/Th2 and Th17/Treg in the spleen, and these effects were attenuated by Ad-LMP7. CONCLUSION PR-957 ameliorates RA progression and inflammation by repressing LMP7-mediated CD4+ T cell imbalance.
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Affiliation(s)
- Qingyang Liu
- Department of Clinical Laboratory, Wuxi Ninth People's Hospital Affiliated to Soochow University, Wuxi 214000, Jiangsu, China
| | - Jin Shen
- Department of Clinical Laboratory, Wuxi Ninth People's Hospital Affiliated to Soochow University, Wuxi 214000, Jiangsu, China
| | - Jian Wang
- Department of Joint Surgery, Wuxi Ninth People's Hospital Affiliated to Soochow University, Wuxi 214000, Jiangsu, China
| | - Jinjun Xia
- Department of Clinical Laboratory, Wuxi Ninth People's Hospital Affiliated to Soochow University, Wuxi 214000, Jiangsu, China
| | - Jian Yin
- Department of Clinical Laboratory, Wuxi Ninth People's Hospital Affiliated to Soochow University, Wuxi 214000, Jiangsu, China
| | - Guowei Cheng
- Department of Clinical Laboratory, Wuxi Ninth People's Hospital Affiliated to Soochow University, Wuxi 214000, Jiangsu, China
| | - Ximing Qian
- Department of Clinical Laboratory, Wuxi Ninth People's Hospital Affiliated to Soochow University, Wuxi 214000, Jiangsu, China
| | - Yun Jiang
- Department of Clinical Laboratory, Wuxi Ninth People's Hospital Affiliated to Soochow University, Wuxi 214000, Jiangsu, China
| | - Xin Ge
- Department of Critical Care Medicine, Wuxi Ninth People's Hospital Affiliated to Soochow University, Wuxi 214000, Jiangsu, China.
| | - Qiubo Wang
- Department of Clinical Laboratory, Wuxi Ninth People's Hospital Affiliated to Soochow University, Wuxi 214000, Jiangsu, China.
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Rochman M, Rochman Y, Caldwell JM, Mack LE, Besse JA, Manes NP, Yoon SH, Shoda T, Nita-Lazar A, Rothenberg ME. The minichromosome maintenance complex drives esophageal basal zone hyperplasia. JCI Insight 2023; 8:e172143. [PMID: 37490338 PMCID: PMC10544209 DOI: 10.1172/jci.insight.172143] [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: 05/08/2023] [Accepted: 07/19/2023] [Indexed: 07/27/2023] Open
Abstract
Eosinophilic esophagitis (EoE) is a chronic gastrointestinal disorder characterized by food antigen-driven eosinophilic inflammation and hyperproliferation of esophageal mucosa. By utilizing a large-scale, proteomic screen of esophageal biopsies, we aimed to uncover molecular drivers of the disease. Proteomic analysis by liquid chromatography-tandem mass spectrometry identified 402 differentially expressed proteins (DEPs) that correlated with the EoE transcriptome. Immune cell-related proteins were among the most highly upregulated DEPs in EoE compared with controls, whereas proteins linked to epithelial differentiation were primarily downregulated. Notably, in the inflamed esophageal tissue, all 6 subunits of the minichromosome maintenance (MCM) complex, a DNA helicase essential for genomic DNA replication, were significantly upregulated at the gene and protein levels. Furthermore, treating esophageal epithelial cells with a known inhibitor of the MCM complex (ciprofloxacin) blocked esophageal epithelial proliferation. In a murine model of EoE driven by overexpression of IL-13, ciprofloxacin treatment decreased basal zone thickness and reduced dilated intercellular spaces by blocking the transition of epithelial cells through the S-phase of the cell cycle. Collectively, a broad-spectrum proteomic screen has identified the involvement of the MCM complex in EoE and has highlighted MCM inhibitors as potential therapeutic agents for the disease.
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Affiliation(s)
- Mark Rochman
- Division of Allergy and Immunology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Yrina Rochman
- Division of Allergy and Immunology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Julie M. Caldwell
- Division of Allergy and Immunology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Lydia E. Mack
- Division of Allergy and Immunology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - John A. Besse
- Division of Allergy and Immunology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Nathan P. Manes
- Functional Cellular Networks Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland, USA
| | - Sung Hwan Yoon
- Functional Cellular Networks Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland, USA
| | - Tetsuo Shoda
- Division of Allergy and Immunology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Aleksandra Nita-Lazar
- Functional Cellular Networks Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland, USA
| | - Marc E. Rothenberg
- Division of Allergy and Immunology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
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Oliveri F, Keller SJ, Goebel H, Alvarez Salinas GO, Basler M. The ubiquitin-like modifier FAT10 is degraded by the 20S proteasome in vitro but not in cellulo. Life Sci Alliance 2023; 6:e202201760. [PMID: 37012049 PMCID: PMC10070814 DOI: 10.26508/lsa.202201760] [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: 10/07/2022] [Revised: 03/23/2023] [Accepted: 03/23/2023] [Indexed: 04/05/2023] Open
Abstract
Ubiquitin-independent protein degradation via the 20S proteasome without the 19S regulatory particle has gained increasing attention over the last years. The degradation of the ubiquitin-like modifier FAT10 by the 20S proteasome was investigated in this study. We found that FAT10 was rapidly degraded by purified 20S proteasomes in vitro, which was attributed to the weak folding of FAT10 and the N-terminally disordered tail. To confirm our results in cellulo, we established an inducible RNA interference system in which the AAA-ATPase Rpt2 of the 19S regulatory particle is knocked down to impair the function of the 26S proteasome. Using this system, degradation of FAT10 in cellulo was strongly dependent on functional 26S proteasome. Our data indicate that in vitro degradation studies with purified proteins do not necessarily reflect biological degradation mechanisms occurring in cells and, therefore, cautious data interpretation is required when 20S proteasome function is studied in vitro.
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Affiliation(s)
- Franziska Oliveri
- Division of Immunology, Department of Biology, University of Konstanz, Konstanz, Germany
| | | | - Heike Goebel
- Division of Immunology, Department of Biology, University of Konstanz, Konstanz, Germany
| | | | - Michael Basler
- Division of Immunology, Department of Biology, University of Konstanz, Konstanz, Germany;
- Biotechnology Institute Thurgau https://ror.org/0546hnb39 at the University of Konstanz, Kreuzlingen, Switzerland
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del Rio Oliva M, Mellett M, Basler M. Immunoproteasome inhibition attenuates experimental psoriasis. Front Immunol 2022; 13:1075615. [PMID: 36591277 PMCID: PMC9798438 DOI: 10.3389/fimmu.2022.1075615] [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: 10/20/2022] [Accepted: 11/29/2022] [Indexed: 12/23/2022] Open
Abstract
Introduction Psoriasis is an autoimmune skin disease associated with multiple comorbidities. The immunoproteasome is a special form of the proteasome expressed in cells of hematopoietic origin. Methods The therapeutic use of ONX 0914, a selective inhibitor of the immunoproteasome, was investigated in Card14ΔE138+/- mice, which spontaneously develop psoriasis-like symptoms, and in the imiquimod murine model. Results In both models, treatment with ONX 0914 significantly reduced skin thickness, inflammation scores, and pathological lesions in the analyzed skin tissue. Furthermore, immunoproteasome inhibition normalized the expression of several pro-inflammatory genes in the ear and significantly reduced the inflammatory infiltrate, accompanied by a significant alteration in the αβ+ and γδ+ T cell subsets. Discussion ONX 0914 ameliorated psoriasis-like symptoms in two different murine psoriasis models, which supports the use of immunoproteasome inhibitors as a therapeutic treatment in psoriasis.
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Affiliation(s)
- Marta del Rio Oliva
- Division of Immunology, Department of Biology, University of Konstanz, Konstanz, Germany
| | - Mark Mellett
- Department of Dermatology, University Hospital Zürich (USZ), Zürich, Switzerland
- Faculty of Medicine, University of Zürich (UZH), Zürich, Switzerland
| | - Michael Basler
- Division of Immunology, Department of Biology, University of Konstanz, Konstanz, Germany
- Biotechnology Institute Thurgau at the University of Konstanz, Kreuzlingen, Switzerland
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Protective Effects of Herba Houttuyniae Aqueous Extract against OVA-Induced Airway Hyperresponsiveness and Inflammation in Asthmatic Mice. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:7609785. [PMID: 36408342 PMCID: PMC9674414 DOI: 10.1155/2022/7609785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 09/26/2022] [Accepted: 09/28/2022] [Indexed: 11/13/2022]
Abstract
Herba Houttuyniae is the well-knownfood-medicine herb with the special taste and smell. It is also widely used in south China for prevention of various chronic pulmonary inflammatory diseases including asthma. However, the active ingredients and therapeutic mechanism of this herb remain obscure. In this study, network pharmacology technology was employed to investigate the effects of Herba Houttuyniae aqueous extract (HHAE) on OVA-induced airway hyperresponsiveness and inflammation. The results showed that six compounds (isoramanone, kaempferol, 1-methyl-2-nonacosyl-4-quinolone, C09747, spinasterol, and quercetin) were found to be mainly responsible for the therapeutic effects of the herb, which totally regulated the expressions of 168 asthma-related proteins. All those targets involved in the signal transduction of the prolactin signaling pathway, central carbon metabolism in cancer, EGFR tyrosine kinase inhibitor resistance, endocrine resistance, and VEGF signaling pathway. The in vivo experiment also revealed that orally administrated with HHAE alleviated airway hyperresponsiveness and inflammation in OVA-induced asthmatic mice. It significantly decreased the counts of neutrophils, eosinophils, and lymphocytes as well as the levels of IL-1β, IL-4, IL-6, and IL-13 in BALF of asthmatic mice. Mechanically, HHAE downregulated both the mRNA and protein expressions of p38 MAPK, PI3K, AKT, and VEGF in the lung tissues of asthmatic mice. Therefore, HHAE improved OVA-induced airway hyperresponsiveness and inflammation in mice and could be a potential supplement for asthma treatment.
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