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Murtas C, Bruschi M, Spinelli S, Kajana X, Verrina EE, Angeletti A, Caridi G, Candiano G, Feriozzi S, Prunotto M, Ghiggeri GM. Novel biomarkers and pathophysiology of membranous nephropathy: PLA2R and beyond. Clin Kidney J 2024; 17:sfad228. [PMID: 38213493 PMCID: PMC10783244 DOI: 10.1093/ckj/sfad228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Indexed: 01/13/2024] Open
Abstract
Research on membranous nephropathy truly exploded in the last 15 years. This happened because of the application of new techniques (laser capture microdissection, mass spectrometry, protein G immunoprecipitation, arrays) to the study of its pathogenesis. After the discovery of PLA2R as the major target antigen, many other antigens were identified and others are probably ongoing. Clinical and pathophysiology rebounds of new discoveries are relevant in terms of diagnosis and prognosis and it is time to make a first assessment of the innovative issues. In terms of classification, target antigens can be divided into: 'membrane antigens' and 'second wave' antigens. The first group consists of antigens constitutionally expressed on the podocyte membrane (as PLA2R) that may become a target of an autoimmune process because of perturbation of immune-tolerance. 'Second wave' antigens are antigens neo-expressed by the podocyte or by infiltrating cells after a stressing event: this allows the immune system to produce antibodies against them that intensify and maintain glomerular damage. With this abundance of target antigens it is not possible, at the moment, to test all antibodies at the bedside. In the absence of this possibility, the role of histological evaluation is still irreplaceable.
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Affiliation(s)
- Corrado Murtas
- Nephrology and Dialysis Unit, Ospedale Belcolle, ASL Viterbo, Viterbo, Italy
| | - Maurizio Bruschi
- Department of Experimental Medicine (DIMES) University of Genoa, Italy
- Nephrology, Dialysis and Transplantation Unit, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Sonia Spinelli
- Nephrology, Dialysis and Transplantation Unit, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Xhuliana Kajana
- Nephrology, Dialysis and Transplantation Unit, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Enrico E Verrina
- Nephrology, Dialysis and Transplantation Unit, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Andrea Angeletti
- Nephrology, Dialysis and Transplantation Unit, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Gianluca Caridi
- Nephrology, Dialysis and Transplantation Unit, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Giovanni Candiano
- Nephrology, Dialysis and Transplantation Unit, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Sandro Feriozzi
- Nephrology and Dialysis Unit, Ospedale Belcolle, ASL Viterbo, Viterbo, Italy
| | - Marco Prunotto
- Institute of Pharmaceutical Sciences of Western Switzerland, School of Pharmaceutical Sciences, University of Geneva, Geneva, Switzerland
| | - Gian Marco Ghiggeri
- Nephrology, Dialysis and Transplantation Unit, IRCCS Istituto Giannina Gaslini, Genova, Italy
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2
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Kajana X, Spinelli S, Garbarino A, Balagura G, Bartolucci M, Petretto A, Pavanello M, Candiano G, Panfoli I, Bruschi M. Identification of Central Nervous System Oncologic Disease Biomarkers in EVs from Cerebrospinal Fluid (CSF) of Pediatric Patients: A Pilot Neuro-Proteomic Study. Biomolecules 2023; 13:1730. [PMID: 38136601 PMCID: PMC10741637 DOI: 10.3390/biom13121730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 11/17/2023] [Accepted: 11/28/2023] [Indexed: 12/24/2023] Open
Abstract
Cerebrospinal fluid (CSF) is a biochemical-clinical window into the brain. Unfortunately, its wide dynamic range, low protein concentration, and small sample quantity significantly limit the possibility of using it routinely. Extraventricular drainage (EVD) of CSF allows us to solve quantitative problems and to study the biological role of extracellular vesicles (EVs). In this study, we implemented bioinformatic analysis of our previous data of EVD of CSF and its EVs obtained from congenital hydrocephalus with the aim of identifying a comprehensive list of potential tumor and non-tumor biomarkers of central nervous system diseases. Among all proteins identified, those enriched in EVs are associated with synapses, synaptosomes, and nervous system diseases including gliomas, embryonal tumors, and epilepsy. Among these EV-enriched proteins, given the broad consensus present in the recent scientific literature, we validated syntaxin-binding protein 1 (STXBP1) as a marker of malignancy in EVD of CSF and its EVs from patients with pilocytic astrocytoma and medulloblastoma. Our results show that STXBP1 is negatively enriched in EVs compared to non-tumor diseases and its downregulation correlates with adverse outcomes. Further experiments are needed to validate this and other EV markers in the blood of pediatric patients for translational medicine applications.
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Affiliation(s)
- Xhuliana Kajana
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy (S.S.)
| | - Sonia Spinelli
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy (S.S.)
| | - Andrea Garbarino
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy (S.S.)
| | - Ganna Balagura
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, University of Genoa, 16132 Genoa, Italy
| | - Martina Bartolucci
- Proteomics and Clinical Metabolomics Unit at the Core Facilities, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (M.B.)
| | - Andrea Petretto
- Proteomics and Clinical Metabolomics Unit at the Core Facilities, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (M.B.)
| | - Marco Pavanello
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy (S.S.)
| | - Giovanni Candiano
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy (S.S.)
| | - Isabella Panfoli
- Department of Pharmacy (DIFAR), School of Medical and Pharmaceutical Sciences, University of Genoa, 16132 Genoa, Italy
| | - Maurizio Bruschi
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy (S.S.)
- Department of Experimental Medicine (DIMES), University of Genoa, 16132 Genoa, Italy
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La Porta E, Exacoustos O, Lugani F, Angeletti A, Chiarenza DS, Bigatti C, Spinelli S, Kajana X, Garbarino A, Bruschi M, Candiano G, Caridi G, Mancianti N, Calatroni M, Verzola D, Esposito P, Viazzi F, Verrina E, Ghiggeri GM. Microplastics and Kidneys: An Update on the Evidence for Deposition of Plastic Microparticles in Human Organs, Tissues and Fluids and Renal Toxicity Concern. Int J Mol Sci 2023; 24:14391. [PMID: 37762695 PMCID: PMC10531672 DOI: 10.3390/ijms241814391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 09/17/2023] [Accepted: 09/17/2023] [Indexed: 09/29/2023] Open
Abstract
Plastic pollution became a main challenge for human beings as demonstrated by the increasing dispersion of plastic waste into the environment. Microplastics (MPs) have become ubiquitous and humans are exposed daily to inhalation or ingestion of plastic microparticles. Recent studies performed using mainly spectroscopy or spectrometry-based techniques have shown astounding evidence for the presence of MPs in human tissues, organs and fluids. The placenta, meconium, breast milk, lung, intestine, liver, heart and cardiovascular system, blood, urine and cerebrovascular liquid are afflicted by MPs' presence and deposition. On the whole, obtained data underline a great heterogeneity among different tissue and organs of the polymers characterized and the microparticles' dimension, even if most of them seem to be below 50-100 µm. Evidence for the possible contribution of MPs in human diseases is still limited and this field of study in medicine is in an initial state. However, increasing studies on their toxicity in vitro and in vivo suggest worrying effects on human cells mainly mediated by oxidative stress, inflammation and fibrosis. Nephrological studies are insufficient and evidence for the presence of MPs in human kidneys is still lacking, but the little evidence present in the literature has demonstrated histological and functional alteration of kidneys in animal models and cytotoxicity through apoptosis, autophagy, oxidative stress and inflammation in kidney cells. Overall, the manuscript we report in this review recommends urgent further study to analyze potential correlations between kidney disease and MPs' exposure in human.
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Affiliation(s)
- Edoardo La Porta
- UO Nephrology Dialysis and Transplant, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (E.L.P.); (O.E.); (F.L.); (A.A.); (D.S.C.); (C.B.); (E.V.)
- UOSD Dialysis IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (G.C.); (G.C.)
| | - Ottavia Exacoustos
- UO Nephrology Dialysis and Transplant, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (E.L.P.); (O.E.); (F.L.); (A.A.); (D.S.C.); (C.B.); (E.V.)
| | - Francesca Lugani
- UO Nephrology Dialysis and Transplant, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (E.L.P.); (O.E.); (F.L.); (A.A.); (D.S.C.); (C.B.); (E.V.)
| | - Andrea Angeletti
- UO Nephrology Dialysis and Transplant, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (E.L.P.); (O.E.); (F.L.); (A.A.); (D.S.C.); (C.B.); (E.V.)
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (S.S.); (X.K.); (A.G.); (M.B.)
| | - Decimo Silvio Chiarenza
- UO Nephrology Dialysis and Transplant, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (E.L.P.); (O.E.); (F.L.); (A.A.); (D.S.C.); (C.B.); (E.V.)
| | - Carolina Bigatti
- UO Nephrology Dialysis and Transplant, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (E.L.P.); (O.E.); (F.L.); (A.A.); (D.S.C.); (C.B.); (E.V.)
| | - Sonia Spinelli
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (S.S.); (X.K.); (A.G.); (M.B.)
| | - Xhuliana Kajana
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (S.S.); (X.K.); (A.G.); (M.B.)
| | - Andrea Garbarino
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (S.S.); (X.K.); (A.G.); (M.B.)
| | - Maurizio Bruschi
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (S.S.); (X.K.); (A.G.); (M.B.)
- Department of Experimental Medicine (DIMES), University of Genoa, 16132 Genoa, Italy
| | - Giovanni Candiano
- UOSD Dialysis IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (G.C.); (G.C.)
| | - Gianluca Caridi
- UOSD Dialysis IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (G.C.); (G.C.)
| | - Nicoletta Mancianti
- Nephrology, Dialysis and Transplantation Unit, Department of Emergency-Urgency and Transplantation, University Hospital of Siena, 53100 Siena, Italy;
| | - Marta Calatroni
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, 20072 Milan, Italy;
- Nephrology and Dialysis Division, IRCCS Humanitas Research Hospital, Rozzano, 20089 Milan, Italy
| | - Daniela Verzola
- Department of Internal Medicine, University of Genoa, 16132 Genoa, Italy; (D.V.); (P.E.); (F.V.)
| | - Pasquale Esposito
- Department of Internal Medicine, University of Genoa, 16132 Genoa, Italy; (D.V.); (P.E.); (F.V.)
- Division of Nephrology, Dialysis and Transplantation IRCCS Ospedale Policlinico San Martino, 16132 Genoa, Italy
| | - Francesca Viazzi
- Department of Internal Medicine, University of Genoa, 16132 Genoa, Italy; (D.V.); (P.E.); (F.V.)
- Division of Nephrology, Dialysis and Transplantation IRCCS Ospedale Policlinico San Martino, 16132 Genoa, Italy
| | - Enrico Verrina
- UO Nephrology Dialysis and Transplant, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (E.L.P.); (O.E.); (F.L.); (A.A.); (D.S.C.); (C.B.); (E.V.)
- UOSD Dialysis IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (G.C.); (G.C.)
| | - Gian Marco Ghiggeri
- UO Nephrology Dialysis and Transplant, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (E.L.P.); (O.E.); (F.L.); (A.A.); (D.S.C.); (C.B.); (E.V.)
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (S.S.); (X.K.); (A.G.); (M.B.)
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Angeletti A, Bruschi M, Kajana X, La Porta E, Spinelli S, Caridi G, Lugani F, Verrina EE, Ghiggeri GM. Biologics in steroid resistant nephrotic syndrome in childhood: review and new hypothesis-driven treatment. Front Immunol 2023; 14:1213203. [PMID: 37705972 PMCID: PMC10497215 DOI: 10.3389/fimmu.2023.1213203] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 08/14/2023] [Indexed: 09/15/2023] Open
Abstract
Nephrotic syndrome affects about 2-7 per 100,000 children yearly and accounts for less than 15% of end stage kidney disease. Steroids still represent the cornerstone of therapy achieving remission in 75-90% of the cases The remaining part result as steroid resistant nephrotic syndrome, characterized by the elevated risk of developing end stage kidney disease and frequently presenting disease recurrence in case of kidney transplant. The pathogenesis of nephrotic syndrome is still far to be elucidated, however, efficacy of immune treatments provided the basis to suggest the involvement of the immune system in the pathogenesis of the disease. Based on these substrates, more immune drugs, further than steroids, were administered in steroid resistant nephrotic syndrome, such as antiproliferative and alkylating agents or calcineurin inhibitors. However, such treatments failed in inducing a sustained remission. In last two decades, the developments of monoclonal antibodies, including the anti-CD20 rituximab and inhibitor of B7-1 abatacept, represented a valid opportunity of treatment. However, also the effectiveness of biologics resulted limited. We here propose a new hypothesis-driven treatment based on the combining administration of rituximab with the anti-CD38 monoclonal antibody daratumumab (NCT05704400), sustained by the hypothesis to target the entire B-cells subtypes pool, including the long-lived plasmacells.
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Affiliation(s)
- Andrea Angeletti
- Division of Nephrology, Dialysis, Transplantation, IRCCS Istituto Giannina Gaslini, Genova, Italy
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Maurizio Bruschi
- Division of Nephrology, Dialysis, Transplantation, IRCCS Istituto Giannina Gaslini, Genova, Italy
- Department of Experimental Medicine (DIMES), University of Genoa, Genoa, Italy
| | - Xhuliana Kajana
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Edoardo La Porta
- Division of Nephrology, Dialysis, Transplantation, IRCCS Istituto Giannina Gaslini, Genova, Italy
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Sonia Spinelli
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Gianluca Caridi
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Francesca Lugani
- Division of Nephrology, Dialysis, Transplantation, IRCCS Istituto Giannina Gaslini, Genova, Italy
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Enrico Eugenio Verrina
- Division of Nephrology, Dialysis, Transplantation, IRCCS Istituto Giannina Gaslini, Genova, Italy
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Gian Marco Ghiggeri
- Division of Nephrology, Dialysis, Transplantation, IRCCS Istituto Giannina Gaslini, Genova, Italy
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, Genova, Italy
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Angeletti A, Bruschi M, Kajana X, Lugani F, Candiano G, Ghiggeri GM. Anti-Neu5Gc Antibodies do not Affect Response to Human or Chimeric Monoclonal Anti-CD20 Antibodies in Children with Nephrotic Syndrome. J Am Soc Nephrol 2022; 33:1985-1987. [PMID: 35999046 PMCID: PMC9678026 DOI: 10.1681/asn.2022070755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- Andrea Angeletti
- Division of Nephrology, Dialysis, Transplantation, IRCCS Istituto Giannina Gaslini, Genova, Italy
- Division of Nephrology, Dialysis, Transplantation, Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Maurizio Bruschi
- Division of Nephrology, Dialysis, Transplantation, Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Xhuliana Kajana
- Division of Nephrology, Dialysis, Transplantation, Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Francesca Lugani
- Division of Nephrology, Dialysis, Transplantation, IRCCS Istituto Giannina Gaslini, Genova, Italy
- Division of Nephrology, Dialysis, Transplantation, Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Giovanni Candiano
- Division of Nephrology, Dialysis, Transplantation, Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Gian Marco Ghiggeri
- Division of Nephrology, Dialysis, Transplantation, IRCCS Istituto Giannina Gaslini, Genova, Italy
- Division of Nephrology, Dialysis, Transplantation, Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, Genova, Italy
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Bruschi M, Angeletti A, Kajana X, Moroni G, Sinico RA, Fredi M, Vaglio A, Cavagna L, Pratesi F, Migliorini P, Locatelli F, Pazzola G, Pesce G, Bagnasco M, Manfredi A, Ramirez GA, Esposito P, Negrini S, Bui F, Trezzi B, Emmi G, Cavazzana I, Binda V, Fenaroli P, Pisani I, Montecucco C, Santoro D, Scolari F, Volpi S, Mosca M, Tincani A, Candiano G, Verrina E, Franceschini F, Ravelli A, Prunotto M, Meroni PL, Ghiggeri GM. Evidence for charge-based mimicry in anti dsDNA antibody generation. J Autoimmun 2022; 132:102900. [PMID: 36087539 DOI: 10.1016/j.jaut.2022.102900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 08/22/2022] [Accepted: 08/23/2022] [Indexed: 11/29/2022]
Abstract
Mechanisms for the generation of anti-dsDNA autoantibodies are still not completely elucidated. One theory states that dsDNA interacts for mimicry with antibodies raised versus other antigens but molecular features for mimicry are unknown. Here we show that, at physiological acid-base balance, anti-Annexin A1 binds IgG2 dsDNA in a competitive and dose-dependent way with Annexin A1 and that the competition between the two molecules is null at pH 9. On the other hand, these findings also show that dsDNA and Annexin A1 interact with their respective antibodies on a strictly pH-dependent basis: in both cases, the binding was minimal at pH 4 and maximal at pH9-10. The anionic charge of dsDNA is mainly conferred by the numerous phosphatidic residues. The epitope binding site of Annexin A1 for anti-Annexin A1 IgG2 was here characterized as a string of 34 amino acids at the NH2 terminus, 10 of which are anionic. Circulating levels of anti-dsDNA and anti-Annexin A1 IgG2 antibodies were strongly correlated in patients with systemic lupus erythematosus (n 496) and lupus nephritis (n 425) stratified for age, sex, etc. These results show that dsDNA competes with Annexin A1 for the binding with anti-Annexin A1 IgG2 on a dose and charged mediated base, being able to display an inhibition up to 75%. This study provides the first demonstration that dsDNA may interact with antibodies raised versus other anionic molecules (anti-Annexin A1 IgG2) because of charge mimicry and this interaction may contribute to anti-dsDNA antibodies generation.
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Affiliation(s)
- Maurizio Bruschi
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Andrea Angeletti
- Division of Nephrology, Dialysis and Transplantation, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Xhuliana Kajana
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Gabriella Moroni
- Department of Biomedical Sciences, Humanitas University and IRCCS Humanitas Research Hospital, Milan, Italy
| | | | - Micaela Fredi
- Rheumatology and Clinical Immunology, ASST Spedali Civili and University of Brescia, Italy
| | - Augusto Vaglio
- Department of Biomedical, Experimental and Clinical Sciences "Mario Serio", University of Florence, And Nephrology and Dialysis Unit, Meyer Children's Hospital, Florence, Italy
| | - Lorenzo Cavagna
- Division of Rheumatology, University and IRCCS Policlinico S. Matteo, Pavia, Italy
| | - Federico Pratesi
- Clinical Immunology Unit, Department of Internal Medicine, University of Pisa, Italy
| | - Paola Migliorini
- Clinical Immunology Unit, Department of Internal Medicine, University of Pisa, Italy
| | - Francesco Locatelli
- Division of Rheumatology, University and IRCCS Policlinico S. Matteo, Pavia, Italy
| | - Giulia Pazzola
- Nephrology and Dialysis, Arciospedale Santa Maria Nuova, Reggio Emilia, Italy
| | - Giampaola Pesce
- Medical and Radiometabolic Therapy Unit, Department of Internal Medicine, University of Genoa, Italy
| | - Marcello Bagnasco
- Medical and Radiometabolic Therapy Unit, Department of Internal Medicine, University of Genoa, Italy
| | - Angelo Manfredi
- Unit of Internal Medicine and Immunology, IRCCS Ospedale San Raffaele, Milan, Italy
| | | | - Pasquale Esposito
- Unit of Nephrology, Dialysis and Transplantation, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
| | - Simone Negrini
- Department of Internal Medicine, University of Genoa, Italy
| | - Federica Bui
- Division of Nephrology, University of Genoa and Policlinico San Martino, Genoa, Italy
| | - Barbara Trezzi
- Department of Medicine and Surgery, University of Milan, Bicocca, Italy
| | - Giacomo Emmi
- Lupus Clinic Department of Biomedicine, University of Florence, University Hospital Careggi, Florence, Italy
| | - Ilaria Cavazzana
- Rheumatology and Clinical Immunology, ASST Spedali Civili and University of Brescia, Italy
| | - Valentina Binda
- Department of Biomedical Sciences, Humanitas University and IRCCS Humanitas Research Hospital, Milan, Italy
| | - Paride Fenaroli
- Nephrology Unit, University Hospital, University of Parma, Parma, Italy
| | - Isabella Pisani
- Nephrology Unit, University Hospital, University of Parma, Parma, Italy
| | | | - Domenico Santoro
- Nephrology and Dialysis Unit, University of Messina and G Martino Hospital, Messina, Italy
| | - Francesco Scolari
- Division of Nephrology and Dialysis, University of Brescia and Ospedale di Montichiari, Brescia, Italy
| | - Stefano Volpi
- Division of Pediatric Rheumatology, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Marta Mosca
- Rheumatologu Unit, Department of Clinical and Experimental Medicine, University of Pisa, Italy
| | - Angela Tincani
- Rheumatology and Clinical Immunology, ASST Spedali Civili and University of Brescia, Italy
| | - Giovanni Candiano
- Laboratory of Molecular Nephrology, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Enrico Verrina
- Division of Nephrology, Dialysis and Transplantation, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Franco Franceschini
- Rheumatology and Clinical Immunology, ASST Spedali Civili and University of Brescia, Italy
| | - Angelo Ravelli
- Division of Pediatric Rheumatology, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Marco Prunotto
- School of Pharmaceutical Sciences, University of Geneva, Geneva, Switzerland
| | - Pier Luigi Meroni
- Experimental Laboratory of Immunological and Rheumatologic Researches, IRCCS Istituto Auxologico Italiano, Milan, Italy.
| | - Gian Marco Ghiggeri
- Division of Nephrology, Dialysis and Transplantation, IRCCS Istituto Giannina Gaslini, Genoa, Italy.
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7
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Angeletti A, Bruschi M, Colucci M, Kajana X, Porta EL, Caridi G, Lugani F, Ravani P, Vivarelli M, Cravedi P, Ghiggeri GM. Circulating anti-rituximab antibodies do not affect response, to rituximab in Steroid-Dependent Nephrotic Syndrome. Kidney Int Rep 2022; 7:2509-2512. [DOI: 10.1016/j.ekir.2022.08.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/08/2022] [Accepted: 08/15/2022] [Indexed: 11/29/2022] Open
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La Porta E, Bruschi M, Candiano G, Petretto A, Bartolucci M, Kajana X, Zaza G, Granata S, Panfoli I, Vidal E, Ghiggeri GM, Verrina EE. FC 101PROTEOMIC PROFILE OF MESOTHELIAL EXOSOMES ISOLATED FROM PERITONEAL DIALYSIS EFFLUENT OF CHILDREN WITH FOCAL SEGMENTAL GLOMERULOSCLEROSIS. Nephrol Dial Transplant 2021. [DOI: 10.1093/ndt/gfab141.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background and Aims
Peritoneal dialysis (PD) is the worldwide preferred dialysis treatment for children affected by end stage kidney disease. However, due to the unphysiological composition of PD fluids, the peritoneal mesothelium of these patients may undergo structural and functional alterations, which may cause fibrosis. Several factors may accelerate this process and primary kidney disease may have a causative role. In particular, patients affected by corticosteroid resistant focal segmental glomerulosclerosis (FSGS), a rare glomerular disease leading to nephrotic syndrome, seems more prone to develop peritoneal fibrosis. The mechanism causing this predisposition is still unrecognized. To better define this condition, we carried out, for the first time, a new comprehensive comparative proteomic mass spectrometry analysis of mesothelial exosomes from peritoneal dialysis effluent (PDE).
Method
We enrolled 12 paediatric patients on PD. Half of them affected by FSGS and the others affected by other disorders (NO FSGS). Exosomes from mesothelial peritoneal cells were isolated by centrifugation and, using a biotinylated antibody and streptavidin magnetic beads. Exosome size was determined by dynamic light scattering, and antigen profile of exosomes was assayed by western blot. Mass spectrometry data were analyzed by unsupervised hierarchical clustering using multidimensional scaling, in order to identify outliers and dissimilarity between samples. The normalized data were used to construct a co-expression network using the weighted gene co-expression network analysis (WGCNA). A weighted adjacency matrix was constructed, and transformed into a topological overlap matrix, which measures the network connectivity of all proteins. To identify the relationship between each module and each clinical trait, we used module eigengenes (MEs) and calculated the correlation between MEs and the clinical traits. To identify the hub proteins of modules that maximize the discrimination between FSGS and NO FSGS samples, we applied T-test, and non-linear support vector machine (SVM) learning. Finally, gene set enrichment analysis was done to build a functional proteins network based on their Gene Ontology (GO) annotations extracted from the Gene Ontology Consortium.
Results
Our omic study demonstrated that SVM allowed a complete distinction of the whole proteomic exosome mesothelial content of FSGS versus NO FSGS (100% accuracy). Out of the 2490 identified proteins, 40% (995) were involved in endothelial to mesenchymal transition /fibrosis and in the TGF-B pathway. The WGCNA analysis highlighted a total of 40 proteins were that maximize the discrimination between FSGS and NO FSGS patients (Figure 1A). Their expression profile is reported in a heatmap diagram (Figure 1B).
Additionally, we performed GO enrichment analysis (Figure 2) and the algorithm identified that some of the discriminative proteins (TIMP1, CTHRC1, SPARC, CHMP4B, COL5A2, ANXA13, FNC2 and CENP-E) were also highly correlated to the peritoneal dialysis vintage, fibrosis, EMT and PM disease.
Conclusion
Our data demonstrated, for the first time, that mesothelial cells of FSGS are more prone to activate a pro-fibrotic machinery with exosomes having a primary role in this process. Moreover, they indicated that identified FSGS-associated element in mesothelial exosome protein could be employed as potential new biomarkers of mesothelial integrity. Finally, results highlighted that FSGS should be treated with more biocompatible dialysis solution, reduce the length of time on PD and personalize type and regimens of PD to minimize the risk of rapid loss of peritoneal membrane.
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Affiliation(s)
- Edoardo La Porta
- Iclas-GVM Group, Cardionephrology, Rapallo (GE), Italy
- University of Genoa, DIMI, Genova, Italy
- IRCCS Istituto Giannina Gaslini, Dialysis Unit, italy
| | - Maurizio Bruschi
- IRCCS Istituto Giannina Gaslini, Laboratory of Molecular Nephrology, Genova, Italy
| | - Giovanni Candiano
- IRCCS Istituto Giannina Gaslini, Laboratory of Molecular Nephrology, Genova, Italy
| | - Andrea Petretto
- IRCCS Istituto Giannina Gaslini, Laboratory of Mass Spectrometry - Core Facilities, Genova, Italy
| | - Martina Bartolucci
- IRCCS Istituto Giannina Gaslini, Laboratory of Mass Spectrometry - Core Facilities, Genova, Italy
| | - Xhuliana Kajana
- IRCCS Istituto Giannina Gaslini, Laboratory of Molecular Nephrology, Genova, Italy
| | - Gianluigi Zaza
- University Hospital of Verona, Renal Unit, Department of Medicine
| | - Simona Granata
- University Hospital of Verona, Renal Unit, Department of Medicine
| | | | - Enrico Vidal
- University-Hospital of Padova, Pediatric Nephrology, Dialysis and Transplant Unit, Department for Woman‘s and Child’s Health, Padova, Italy
| | - Gian Marco Ghiggeri
- IRCCS Istituto Giannina Gaslini, Division of Nephrology, Dialysis and Transplantation, Genova, Italy
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