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Kelliher S, Gamba S, Weiss L, Shen Z, Marchetti M, Schieppati F, Scaife C, Madden S, Bennett K, Fortune A, Maung S, Fay M, Ní Áinle F, Maguire P, Falanga A, Kevane B, Krishnan A. Platelet proteomic profiling reveals potential mediators of immunothrombosis and proteostasis in myeloproliferative neoplasms. Blood Adv 2024; 8:4276-4280. [PMID: 38861353 PMCID: PMC11372589 DOI: 10.1182/bloodadvances.2023012016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 05/17/2024] [Accepted: 05/31/2024] [Indexed: 06/13/2024] Open
Affiliation(s)
- Sarah Kelliher
- School of Medicine, University College Dublin, Dublin, Ireland
- Stanford University School of Medicine, Stanford University, Stanford, CA
- Department of Haematology, Mater Misericordiae University Hospital, Dublin, Ireland
- UCD Conway SPHERE Research Group, University College Dublin, Dublin, Ireland
| | - Sara Gamba
- Department of Immunohematology and Transfusion Medicine, Hospital Papa Giovanni XXIII, Bergamo, Italy
| | - Luisa Weiss
- UCD Conway SPHERE Research Group, University College Dublin, Dublin, Ireland
- School of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland
| | - Zhu Shen
- Stanford University School of Medicine, Stanford University, Stanford, CA
| | - Marina Marchetti
- Department of Immunohematology and Transfusion Medicine, Hospital Papa Giovanni XXIII, Bergamo, Italy
| | - Francesca Schieppati
- Department of Immunohematology and Transfusion Medicine, Hospital Papa Giovanni XXIII, Bergamo, Italy
| | - Caitriona Scaife
- UCD Conway Institute for Biomolecular and Biomedical Research, University College Dublin, Dublin, Ireland
| | - Stephen Madden
- Data Science Centre, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Kathleen Bennett
- School of Population Health, RCSI University of Medicine and Health Sciences, Dublin, Ireland
| | - Anne Fortune
- School of Medicine, University College Dublin, Dublin, Ireland
- Department of Haematology, Mater Misericordiae University Hospital, Dublin, Ireland
| | - Su Maung
- School of Medicine, University College Dublin, Dublin, Ireland
- Department of Haematology, Mater Misericordiae University Hospital, Dublin, Ireland
| | - Michael Fay
- School of Medicine, University College Dublin, Dublin, Ireland
- Department of Haematology, Mater Misericordiae University Hospital, Dublin, Ireland
| | - Fionnuala Ní Áinle
- School of Medicine, University College Dublin, Dublin, Ireland
- Department of Haematology, Mater Misericordiae University Hospital, Dublin, Ireland
- UCD Conway SPHERE Research Group, University College Dublin, Dublin, Ireland
- Department of Haematology, Rotunda Hospital, Dublin, Ireland
- School of Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Patricia Maguire
- UCD Conway SPHERE Research Group, University College Dublin, Dublin, Ireland
- School of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland
- UCD Institute for Discovery, University College Dublin, Dublin, Ireland
| | - Anna Falanga
- Department of Immunohematology and Transfusion Medicine, Hospital Papa Giovanni XXIII, Bergamo, Italy
- Department of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
| | - Barry Kevane
- School of Medicine, University College Dublin, Dublin, Ireland
- Department of Haematology, Mater Misericordiae University Hospital, Dublin, Ireland
- UCD Conway SPHERE Research Group, University College Dublin, Dublin, Ireland
| | - Anandi Krishnan
- Stanford University School of Medicine, Stanford University, Stanford, CA
- Department of Biomedical Engineering, Rutgers University, Piscataway, NJ
- Stanford Cancer Institute, Stanford, CA
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Kelliher S, Gamba S, Weiss L, Shen Z, Marchetti M, Schieppati F, Scaife C, Madden S, Bennett K, Fortune A, Maung S, Fay M, Ní Áinle F, Maguire P, Falanga A, Kevane B, Krishnan A. Platelet proteo-transcriptomic profiling validates mediators of thrombosis and proteostasis in patients with myeloproliferative neoplasms. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.10.23.563619. [PMID: 37961700 PMCID: PMC10634751 DOI: 10.1101/2023.10.23.563619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Patients with chronic Myeloproliferative Neoplasms (MPN) including polycythemia vera (PV) and essential thrombocythemia (ET) exhibit unique clinical features, such as a tendency toward thrombosis and hemorrhage, and risk of disease progression to secondary bone marrow fibrosis and/or acute leukemia. Although an increase in blood cell lineage counts (quantitative features) contribute to these morbid sequelae, the significant qualitative abnormalities of myeloid cells that contribute to vascular risk are not well understood. Here, we address this critical knowledge gap via a comprehensive and untargeted profiling of the platelet proteome in a large (n= 140) cohort of patients (from two independent sites) with an established diagnosis of PV and ET (and complement prior work on the MPN platelet transcriptome from a third site). We discover distinct MPN platelet protein expression and confirm key molecular impairments associated with proteostasis and thrombosis mechanisms of potential relevance to MPN pathology. Specifically, we validate expression of high-priority candidate markers from the platelet transcriptome at the platelet proteome (e.g., calreticulin (CALR), Fc gamma receptor (FcγRIIA) and galectin-1 (LGALS1) pointing to their likely significance in the proinflammatory, prothrombotic and profibrotic phenotypes in patients with MPN. Together, our proteo-transcriptomic study identifies the peripherally-derived platelet molecular profile as a potential window into MPN pathophysiology and demonstrates the value of integrative multi-omic approaches in gaining a better understanding of the complex molecular dynamics of disease.
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Affiliation(s)
- Sarah Kelliher
- School of Medicine, University College Dublin, Dublin, Ireland
- Stanford University School of Medicine, Stanford University, Stanford, CA, USA
- Department of Haematology, Mater Misericordiae University Hospital, Dublin, Ireland
- UCD Conway SPHERE Research Group, University College Dublin, Dublin, Ireland
| | - Sara Gamba
- Department of Immunohematology and Transfusion Medicine, Hospital Papa Giovanni XXIII, Bergamo, Italy
| | - Luisa Weiss
- UCD Conway SPHERE Research Group, University College Dublin, Dublin, Ireland
- School of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland
| | - Zhu Shen
- Stanford University School of Medicine, Stanford University, Stanford, CA, USA
| | - Marina Marchetti
- Department of Immunohematology and Transfusion Medicine, Hospital Papa Giovanni XXIII, Bergamo, Italy
| | - Francesca Schieppati
- Department of Immunohematology and Transfusion Medicine, Hospital Papa Giovanni XXIII, Bergamo, Italy
| | - Caitriona Scaife
- UCD Conway Institute for Biomolecular and Biomedical Research, University College Dublin, Dublin, Ireland
| | - Stephen Madden
- Data Science Centre, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Kathleen Bennett
- School of Population Health, RCSI University of Medicine and Health Sciences, Dublin, Ireland
| | - Anne Fortune
- School of Medicine, University College Dublin, Dublin, Ireland
- Department of Haematology, Mater Misericordiae University Hospital, Dublin, Ireland
| | - Su Maung
- School of Medicine, University College Dublin, Dublin, Ireland
- Department of Haematology, Mater Misericordiae University Hospital, Dublin, Ireland
| | - Michael Fay
- School of Medicine, University College Dublin, Dublin, Ireland
- Department of Haematology, Mater Misericordiae University Hospital, Dublin, Ireland
| | - Fionnuala Ní Áinle
- School of Medicine, University College Dublin, Dublin, Ireland
- Department of Haematology, Mater Misericordiae University Hospital, Dublin, Ireland
- UCD Conway SPHERE Research Group, University College Dublin, Dublin, Ireland
- School of Medicine, Royal College of Surgeons in Ireland
| | - Patricia Maguire
- UCD Conway SPHERE Research Group, University College Dublin, Dublin, Ireland
- School of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland
- UCD Institute for Discovery, University College Dublin, Dublin, Ireland
| | - Anna Falanga
- Department of Immunohematology and Transfusion Medicine, Hospital Papa Giovanni XXIII, Bergamo, Italy
- University of Milano-Bicocca, Department of Medicine and Surgery, Monza, Italy
| | - Barry Kevane
- School of Medicine, University College Dublin, Dublin, Ireland
- Department of Haematology, Mater Misericordiae University Hospital, Dublin, Ireland
- UCD Conway SPHERE Research Group, University College Dublin, Dublin, Ireland
| | - Anandi Krishnan
- Stanford University School of Medicine, Stanford University, Stanford, CA, USA
- Rutgers University, Piscataway, NJ
- Stanford Cancer Institute, Stanford, CA, USA
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3
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Bonhoure A, Henry L, Bich C, Blanc L, Bergeret B, Bousquet M, Coux O, Stoebner P, Vidal M. Extracellular
20S
proteasome secreted via microvesicles can degrade poorly folded proteins and inhibit Galectin‐3 agglutination activity. Traffic 2022; 23:287-304. [DOI: 10.1111/tra.12840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 02/22/2022] [Accepted: 02/23/2022] [Indexed: 11/30/2022]
Affiliation(s)
- Anne Bonhoure
- Laboratory of Pathogen Host Interactions Université Montpellier, CNRS Montpellier France
| | - Laurent Henry
- Institut des Biomolécules Max Mousseron Université Montpellier, CNRS Montpellier France
| | - Claudia Bich
- Institut des Biomolécules Max Mousseron Université Montpellier, CNRS Montpellier France
| | - Lionel Blanc
- The Feinstein Institutes for Medical Research Manhasset New York USA
| | - Blanche Bergeret
- Institut des Biomolécules Max Mousseron Université Montpellier, CNRS Montpellier France
| | - Marie‐Pierre Bousquet
- Institut de Pharmacologie et de Biologie Structurale Université Toulouse, CNRS, UPS Toulouse France
| | - Olivier Coux
- Centre de Recherche en Biologie cellulaire de Montpellier Univ. Montpellier, CNRS Montpellier France
| | - Pierre‐Emmanuel Stoebner
- Service de Dermatologie, CHU Nîmes Nîmes France
- Institut de Recherche en Cancérologie de Montpellier (IRCM) Université Montpellier Montpellier France
| | - Michel Vidal
- Laboratory of Pathogen Host Interactions Université Montpellier, CNRS Montpellier France
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Găman MA, Cozma MA, Dobrică EC, Crețoiu SM, Găman AM, Diaconu CC. Liquid Biopsy and Potential Liquid Biopsy-Based Biomarkers in Philadelphia-Negative Classical Myeloproliferative Neoplasms: A Systematic Review. Life (Basel) 2021; 11:677. [PMID: 34357048 PMCID: PMC8304270 DOI: 10.3390/life11070677] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 07/07/2021] [Accepted: 07/09/2021] [Indexed: 12/14/2022] Open
Abstract
Myeloproliferative neoplasms (MPNs) are rare, clonal disorders of the hematopoietic stem cell in which an uncontrolled proliferation of terminally differentiated myeloid cells is noted. Polycythemia vera (PV), essential thrombocythemia (ET) and primary myelofibrosis (PMF) are included in the category of Philadelphia-negative, so-called classical MPNs. The potential applications of liquid biopsy and liquid biopsy-based biomarkers have not been explored in MPNs until now. Thus, a systematic search was computed in PubMed/MEDLINE, Web of Science and The Cochrane Library and, in total, 198 potentially relevant papers were detected. Following the removal of duplicates (n = 85), 113 records were screened. After the exclusion of irrelevant manuscripts based on the screening of their titles and abstracts (n = 81), we examined the full texts of 33 manuscripts. Finally, after we applied the exclusion and inclusion criteria, 27 original articles were included in this review. Overall, the data analyzed in this review point out that liquid biopsy and liquid biopsy-based biomarkers (cell-free DNA, extracellular vesicles, microparticles, circulating endothelial cells) could be used in MPNs for diagnostic and prognostic purposes. Future research is needed to clarify whether this technique can be employed to differentiate between MPN subtypes and secondary causes of erythrocytosis, thrombocytosis and myelofibrosis, as well as to predict the development of thrombosis.
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Affiliation(s)
- Mihnea-Alexandru Găman
- Faculty of Medicine, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania;
- Department of Hematology, Center of Hematology and Bone Marrow Transplantation, Fundeni Clinical Institute, 022328 Bucharest, Romania
| | - Matei-Alexandru Cozma
- Department of Gastroenterology, Colentina Clinical Hospital, 020125 Bucharest, Romania;
| | - Elena-Codruța Dobrică
- Department of Pathophysiology, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania; (E.-C.D.); (A.M.G.)
- Department of Dermatology, “Elias” University Emergency Hospital, 011461 Bucharest, Romania
| | - Sanda Maria Crețoiu
- Department of Cell and Molecular Biology and Histology, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
| | - Amelia Maria Găman
- Department of Pathophysiology, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania; (E.-C.D.); (A.M.G.)
- Clinic of Hematology, Filantropia City Hospital, 200143 Craiova, Romania
| | - Camelia Cristina Diaconu
- Faculty of Medicine, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania;
- Department of Internal Medicine, Clinical Emergency Hospital of Bucharest, 105402 Bucharest, Romania
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Necchi V, Ricci V, Sommi P, Solcia E. CagA Effector Protein in Helicobacter pylori-Infected Human Gastric Epithelium in Vivo: From Bacterial Core and Adhesion/Injection Clusters to Host Cell Proteasome-Rich Cytosol. Toxins (Basel) 2019; 11:toxins11110618. [PMID: 31731531 PMCID: PMC6891489 DOI: 10.3390/toxins11110618] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 10/14/2019] [Accepted: 10/24/2019] [Indexed: 01/13/2023] Open
Abstract
A key role in the carcinogenic action of Helicobacter pylori is played by the effector protein CagA, the first identified oncoprotein of the bacterial world. However, the present knowledge in regard to the bacterial injection of CagA into epithelial cells (through a type IV secretion system) and its intracellular fate is based primarily on experimental studies in vitro. Our study was aimed to investigate, in H. pylori-infected human gastric epithelium, CagA delivery and intracellular distribution in order to identify any in vivo counterpart of the cell injection mechanism described in vitro and any intracellular cytoplasmic site of preferential CagA distribution, thus shedding light on the natural history of CagA in vivo. By transmission electron microscopy and ultrastructural immunocytochemistry (which combine precise molecule localization with detailed analysis of bacterial-host cell interaction and epithelial cell ultrastructure), we investigated endoscopic biopsies of gastric antrum from H. pylori-infected dyspeptic patients. Our findings provide support for CagA direct injection into gastric epithelial cells at bacterial adhesion sites located on the lateral plasma membrane and for its cytosolic intracellular distribution with selective concentration inside peculiar proteasome-rich areas, which might be site not only of CagA degradation but also of CagA-promoted crucial events in gastric carcinogenesis.
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Affiliation(s)
- Vittorio Necchi
- Department of Molecular Medicine, University of Pavia, 27100 Pavia, Italy; (V.N.); (P.S.); (E.S.)
- Centro Grandi Strumenti, University of Pavia, 27100 Pavia, Italy
| | - Vittorio Ricci
- Department of Molecular Medicine, University of Pavia, 27100 Pavia, Italy; (V.N.); (P.S.); (E.S.)
- Correspondence: ; Tel.: +39-0382-987-254; Fax: +39-0382-987-664
| | - Patrizia Sommi
- Department of Molecular Medicine, University of Pavia, 27100 Pavia, Italy; (V.N.); (P.S.); (E.S.)
| | - Enrico Solcia
- Department of Molecular Medicine, University of Pavia, 27100 Pavia, Italy; (V.N.); (P.S.); (E.S.)
- Pathologic Anatomy Unit, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy
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Bec N, Bonhoure A, Henry L, Berry L, Larroque C, Coux O, Stoebner P, Vidal M. Proteasome 19S RP and translation preinitiation complexes are secreted within exosomes upon serum starvation. Traffic 2019; 20:516-536. [DOI: 10.1111/tra.12653] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 04/29/2019] [Accepted: 04/30/2019] [Indexed: 12/23/2022]
Affiliation(s)
- Nicole Bec
- PP2IUniversity of Montpellier, IRCM Montpellier France
- IRBMUniversity of Montpellier CNRS, Montpellier France
| | - Anne Bonhoure
- DIMNPUniversity of Montpellier, CNRS Montpellier France
| | - Laurent Henry
- IBMMUniversity of Montpellier, CNRS Montpellier France
| | | | - Christian Larroque
- PP2IUniversity of Montpellier, IRCM Montpellier France
- ICMInstitut du Cancer de Montpellier Montpellier France
| | - Olivier Coux
- CRBMUniversity of Montpellier, CNRS Montpellier France
| | | | - Michel Vidal
- DIMNPUniversity of Montpellier, CNRS Montpellier France
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7
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Solcia E, Necchi V, Sommi P, Ricci V. Proteasome-Rich PaCS as an Oncofetal UPS Structure Handling Cytosolic Polyubiquitinated Proteins. In Vivo Occurrence, in Vitro Induction, and Biological Role. Int J Mol Sci 2018; 19:ijms19092767. [PMID: 30223470 PMCID: PMC6164709 DOI: 10.3390/ijms19092767] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 09/11/2018] [Indexed: 11/16/2022] Open
Abstract
In this article, we outline and discuss available information on the cellular site and mechanism of proteasome interaction with cytosolic polyubiquitinated proteins and heat-shock molecules. The particulate cytoplasmic structure (PaCS) formed by barrel-like particles, closely reproducing in vivo the high-resolution structure of 26S proteasome as isolated in vitro, has been detected in a variety of fetal and neoplastic cells, from living tissue or cultured cell lines. Specific trophic factors and interleukins were found to induce PaCS during in vitro differentiation of dendritic, natural killer (NK), or megakaryoblastic cells, apparently through activation of the MAPK-ERK pathway. Direct interaction of CagA bacterial oncoprotein with proteasome was shown inside the PaCSs of a Helicobacter pylori-infected gastric epithelium, a finding suggesting a role for PaCS in CagA-mediated gastric carcinogenesis. PaCS dissolution and autophagy were seen after withdrawal of inducing factors. PaCS-filled cell blebs and ectosomes were found in some cells and may represent a potential intercellular discharge and transport system of polyubiquitinated antigenic proteins. PaCS differs substantially from the inclusion bodies, sequestosomes, and aggresomes reported in proteinopathies like Huntington or Parkinson diseases, which usually lack PaCS. The latter seems more linked to conditions of increased cell proliferation/differentiation, implying an increased functional demand to the ubiquitin–proteasome system.
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Affiliation(s)
- Enrico Solcia
- Department of Molecular Medicine, University of Pavia, 27100 Pavia, Italy.
- Pathologic Anatomy Unit, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy.
| | - Vittorio Necchi
- Department of Molecular Medicine, University of Pavia, 27100 Pavia, Italy.
- Centro Grandi Strumenti, University of Pavia, 27100 Pavia, Italy.
| | - Patrizia Sommi
- Department of Molecular Medicine, University of Pavia, 27100 Pavia, Italy.
| | - Vittorio Ricci
- Department of Molecular Medicine, University of Pavia, 27100 Pavia, Italy.
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8
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Cheng J, Liu C, Liu L, Chen X, Shan J, Shen J, Zhu W, Qian C. MEK1 signaling promotes self-renewal and tumorigenicity of liver cancer stem cells via maintaining SIRT1 protein stabilization. Oncotarget 2018; 7:20597-611. [PMID: 26967560 PMCID: PMC4991478 DOI: 10.18632/oncotarget.7972] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 02/02/2016] [Indexed: 12/13/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is the third leading cause of cancer death. This high mortality has been commonly attributed to the presence of residual cancer stem cells (CSCs). Meanwhile, MEK1 signaling is regarded as a key molecular in HCC maintenance and development. However, nobody has figured out the particular mechanisms that how MEK1 signaling regulates liver CSCs self-renewal. In this study, we show that inhibition or depletion of MEK1 can significantly decrease liver CSCs self-renewal and tumor growth both in vitro and vivo conditions. Furthermore, we demonstrate that MEK1 signaling promotes liver CSCs self-renewal and tumorigenicity by maintaining SIRT1 level. Mechanistically, MEK1 signaling keeps SIRT1 protein stabilization through activating SIRT1 ubiquitination, which inhibits proteasomal degradation. Clinical analysis shows that patients co-expression of MEK1 and SIRT1 are associated with poor survival. Our finding indicates that MEK1-SIRT1 can act as a novel diagnostic biomarker and inhibition of MEK1 may be a viable therapeutic option for targeting liver CSCs treatment.
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Affiliation(s)
- Jiamin Cheng
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Chungang Liu
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Limei Liu
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Xuejiao Chen
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Juanjuan Shan
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Junjie Shen
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Wei Zhu
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Cheng Qian
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
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9
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Different Polyubiquitinated Bodies in Human Dendritic Cells: IL-4 Causes PaCS During Differentiation while LPS or IFNα Induces DALIS During Maturation. Sci Rep 2017; 7:1844. [PMID: 28500302 PMCID: PMC5431999 DOI: 10.1038/s41598-017-02090-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 04/05/2017] [Indexed: 01/08/2023] Open
Abstract
Two types of polyubiquitin-reactive cytoplasmic bodies, particulate cytoplasmic structures (PaCS) and dendritic cell (DC) aggresome-like induced structures (DALIS), were analyzed by electron microscopy, immunocytochemistry, immunoblotting, and flow cytometry in DC obtained from human blood monocytes incubated with GM-CSF plus IL-4 (IL4-DC), GM-CSF plus IFNα (IFN-DC), or GM-CSF alone (GM-DC), with or without LPS maturation. PaCS developed as monomorphic aggregates of proteasome-reactive barrel-like particles only in ribosomes-rich cytoplasmic areas of differentiating IL4-DC. In contrast, DALIS formed as vesicular bodies storing K63-linked ubiquitinated proteins by coalescence of increased endosomal structures, in IFN-DC or after LPS maturation of GM-DC. DALIS-forming cells showed incomplete morphological and functional DC-type differentiation when compared to PaCS-forming IL4-DC. PaCS and DALIS may have different function as well as different origin and cytochemistry. DALIS may be a transient accumulation site of potentially antigenic polyubiquitinated proteins during their processing and presentation. PaCS are found under physiologic or pathologic conditions associated with increased/deranged protein synthesis and increased ubiquitin-proteasome activity. Given its high heat-shock protein content PaCS may work as a quality control structure for newly synthesized, cytosolic proteins. This comparative analysis suggests that PaCS and DALIS have distinctive roles in DC.
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