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Zanchi C, Locatelli M, Cerullo D, Aumiller V, Corna D, Rottoli D, Schubert S, Noris M, Tomasoni S, Remuzzi G, Zoja C, Benigni A. Efficacy of GalNAc C3 siRNAs in factor H-deficient mice with C3 glomerulopathy. Mol Immunol 2024; 168:10-16. [PMID: 38368725 DOI: 10.1016/j.molimm.2024.02.010] [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: 11/03/2023] [Revised: 01/17/2024] [Accepted: 02/12/2024] [Indexed: 02/20/2024]
Abstract
Complement alternative pathway (AP) dysregulation drives C3 glomerulopathy (C3G), a rare renal disorder characterized by glomerular C3 deposition and glomerular damage, for which no effective treatments are available. Blockade of complement C3 is emerging as a viable therapeutic option. In an earlier study we showed that SLN500, a small interfering RNA targeting liver C3 synthesis, was able to limit AP dysregulation and glomerular C3d deposits in mice with partial factor H (FH) deficiency (Cfh+/- mice). Here, we assessed the pharmacological effects of SLN501 - an optimized SLN500 version - in mice with complete FH deficiency (Cfh-/- mice) that exhibit a more severe C3G phenotype. SLN501 effectively prevented liver C3 synthesis, thus limiting AP dysregulation, glomerular C3d deposits and the development of ultrastructural alterations. These data provide firm evidence of the use of siRNA-mediated liver C3 gene silencing as a potential therapy for treating C3G patients with either partial or complete FH loss of function.
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Affiliation(s)
- Cristina Zanchi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Monica Locatelli
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Domenico Cerullo
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | | | - Daniela Corna
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Daniela Rottoli
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | | | - Marina Noris
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Susanna Tomasoni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Giuseppe Remuzzi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Carlamaria Zoja
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Ariela Benigni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy.
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Locatelli M, Rottoli D, Mahmoud R, Abbate M, Corna D, Cerullo D, Tomasoni S, Remuzzi G, Zoja C, Benigni A, Macconi D. Endothelial Glycocalyx of Peritubular Capillaries in Experimental Diabetic Nephropathy: A Target of ACE Inhibitor-Induced Kidney Microvascular Protection. Int J Mol Sci 2023; 24:16543. [PMID: 38003732 PMCID: PMC10671403 DOI: 10.3390/ijms242216543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 11/08/2023] [Accepted: 11/10/2023] [Indexed: 11/26/2023] Open
Abstract
Peritubular capillary rarefaction is a recurrent aspect of progressive nephropathies. We previously found that peritubular capillary density was reduced in BTBR ob/ob mice with type 2 diabetic nephropathy. In this model, we searched for abnormalities in the ultrastructure of peritubular capillaries, with a specific focus on the endothelial glycocalyx, and evaluated the impact of treatment with an angiotensin-converting enzyme inhibitor (ACEi). Mice were intracardially perfused with lanthanum to visualise the glycocalyx. Transmission electron microscopy analysis revealed endothelial cell abnormalities and basement membrane thickening in the peritubular capillaries of BTBR ob/ob mice compared to wild-type mice. Remodelling and focal loss of glycocalyx was observed in lanthanum-stained diabetic kidneys, associated with a reduction in glycocalyx components, including sialic acids, as detected through specific lectins. ACEi treatment preserved the endothelial glycocalyx and attenuated the ultrastructural abnormalities of peritubular capillaries. In diabetic mice, peritubular capillary damage was associated with an enhanced tubular expression of heparanase, which degrades heparan sulfate residues of the glycocalyx. Heparanase was also detected in renal interstitial macrophages that expressed tumor necrosis factor-α. All these abnormalities were mitigated by ACEi. Our findings suggest that, in experimental diabetic nephropathy, preserving the endothelial glycocalyx is important in order to protect peritubular capillaries from damage and loss.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Ariela Benigni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy; (M.L.); (D.R.); (R.M.); (M.A.); (D.C.); (D.C.); (S.T.); (G.R.); (C.Z.); (D.M.)
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Trionfini P, Romano E, Varinelli M, Longaretti L, Rizzo P, Giampietro R, Caroli A, Aiello S, Todeschini M, Casiraghi F, Remuzzi G, Benigni A, Tomasoni S. Hypoimmunogenic Human Pluripotent Stem Cells as a Powerful Tool for Liver Regenerative Medicine. Int J Mol Sci 2023; 24:11810. [PMID: 37511568 PMCID: PMC10380710 DOI: 10.3390/ijms241411810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/13/2023] [Accepted: 07/19/2023] [Indexed: 07/30/2023] Open
Abstract
Induced pluripotent stem cells (iPSC) have huge potential as cell therapy for various diseases, given their potential for unlimited self-renewal and capability to differentiate into a wide range of cell types. Although autologous iPSCs represents the ideal source for patient-tailored regenerative medicine, the high costs of the extensive and time-consuming production process and the impracticability for treating acute conditions hinder their use for broad applications. An allogeneic iPSC-based strategy may overcome these issues, but it carries the risk of triggering an immune response. So far, several approaches based on genome-editing techniques to silence human leukocyte antigen class I (HLA-I) or II (HLA-II) expression have been explored to overcome the immune rejection of allogeneic iPSCs. In this study, we employed the CRISPR/Cas9 (clustered regularly interspaced short palindromic repeats/CRISPR associated protein 9) system to delete the β2-Microglobulin (B2M) and the Class II Major Histocompatibility Complex Transactivator (CIITA) genes, essential for the correct surface expression of HLA-I and HLA-II proteins. The resulting hypoimmunogenic iPSC line has a normal karyotype, expresses the pluripotency stem cell markers, and is capable of differentiating into the three embryonic germ layers. Furthermore, we showed that it specifically retains the ability to differentiate towards different liver cells, such as endothelial-like cells, hepatocyte-like cells, and hepatic stellate-like cells. Our results indicate that hypoimmunogenic iPSCs could give a new cost-effective and off-the-shelf opportunity for cell therapy in liver diseases.
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Affiliation(s)
- Piera Trionfini
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy
| | - Elena Romano
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy
| | - Marco Varinelli
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy
| | - Lorena Longaretti
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy
| | - Paola Rizzo
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy
| | - Roberta Giampietro
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy
| | - Annalina Caroli
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy
| | - Sistiana Aiello
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy
| | - Marta Todeschini
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy
| | - Federica Casiraghi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy
| | - Giuseppe Remuzzi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy
| | - Ariela Benigni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy
| | - Susanna Tomasoni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy
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Perico L, Todeschini M, Casiraghi F, Mister M, Pezzotta A, Peracchi T, Tomasoni S, Trionfini P, Benigni A, Remuzzi G. Long-term adaptive response in COVID-19 vaccine recipients and the effect of a booster dose. Front Immunol 2023; 14:1123158. [PMID: 36926327 PMCID: PMC10011096 DOI: 10.3389/fimmu.2023.1123158] [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: 12/13/2022] [Accepted: 02/16/2023] [Indexed: 03/08/2023] Open
Abstract
We examined the immune response in subjects previously infected with SARS-CoV2 and infection-naïve 9 months after primary 2-dose COVID-19 mRNA vaccination and 3 months after the booster dose in a longitudinal cohort of healthcare workers. Nine months after primary vaccination, previously infected subjects exhibited higher residual antibody levels, with significant neutralizing activity against distinct variants compared to infection-naïve subjects. The higher humoral response was associated with higher levels of receptor binding domain (RBD)-specific IgG+ and IgA+ memory B cells. The booster dose increased neither neutralizing activity, nor the B and T cell frequencies. Conversely, infection-naïve subjects needed the booster to achieve comparable levels of neutralizing antibodies as those found in previously infected subjects after primary vaccination. The neutralizing titer correlated with anti-RBD IFNγ producing T cells, in the face of sustained B cell response. Notably, pre-pandemic samples showed high Omicron cross-reactivity. These data show the importance of the booster dose in reinforcing immunological memory and increasing circulating antibodies in infection-naïve subjects.
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Affiliation(s)
- Luca Perico
- Department of Molecular Medicine, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Marta Todeschini
- Department of Molecular Medicine, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Federica Casiraghi
- Department of Molecular Medicine, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Marilena Mister
- Department of Molecular Medicine, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Anna Pezzotta
- Department of Molecular Medicine, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Tobia Peracchi
- Department of Molecular Medicine, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Susanna Tomasoni
- Department of Molecular Medicine, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Piera Trionfini
- Department of Molecular Medicine, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Ariela Benigni
- Department of Molecular Medicine, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Giuseppe Remuzzi
- Department of Molecular Medicine, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
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Benigni A, Tomasoni S. Editorial: Women in renal pharmacology: 2021. Front Pharmacol 2022; 13:1054354. [PMID: 36339608 PMCID: PMC9634563 DOI: 10.3389/fphar.2022.1054354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 10/11/2022] [Indexed: 11/13/2022] Open
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Conti S, Remuzzi G, Benigni A, Tomasoni S. Imaging the Kidney with an Unconventional Scanning Electron Microscopy Technique: Analysis of the Subpodocyte Space in Diabetic Mice. Int J Mol Sci 2022; 23:ijms23031699. [PMID: 35163622 PMCID: PMC8836024 DOI: 10.3390/ijms23031699] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 01/25/2022] [Accepted: 01/30/2022] [Indexed: 02/04/2023] Open
Abstract
Transmission electron microscopy (TEM) remains the gold standard for renal histopathological diagnoses, given its higher resolving power, compared with light microscopy. However, it imposes several limitations on pathologists, including longer sample preparation time and a small observation area. To overcome these, we introduced a scanning electron microscopy (SEM) technique for imaging resin-embedded semi-thin sections of renal tissue. We developed a rapid tissue preparation protocol for experimental models and human biopsies which, alongside SEM digital imaging acquisition of secondary electrons (SE–SEM), enables fast electron microscopy examination, with a resolution similar to that achieved by TEM. We used this unconventional SEM imaging approach to investigate the subpodocyte space (SPS) in BTBR ob/ob mice with type 2 diabetes. Analysis of semi-thin sections with secondary electrons revealed that the SPS had expanded in volume and covered large areas of the glomerular basement membrane, forming wide spaces between the podocyte body and the underlying filtering membrane. Our results show that SE–SEM is a valuable tool for imaging the kidney at the ultrastructural level, filling the magnification gap between light microscopy and TEM, and reveal that in diabetic mice, the SPS is larger than in normal controls, which is associated with podocyte damage and impaired kidney function.
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Locatelli M, Zoja C, Conti S, Cerullo D, Corna D, Rottoli D, Zanchi C, Tomasoni S, Remuzzi G, Benigni A. Empagliflozin protects glomerular endothelial cell architecture in experimental diabetes through the VEGF-A/caveolin-1/PV-1 signaling pathway. J Pathol 2022; 256:468-479. [PMID: 35000230 DOI: 10.1002/path.5862] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 11/29/2021] [Accepted: 01/06/2022] [Indexed: 11/09/2022]
Abstract
In addition to having blood glucose-lowering effects, inhibitors of sodium glucose cotransporter 2 (SGLT2) afford renoprotection in diabetes. We sought to investigate which components of the glomerular filtration barrier could be involved in the antiproteinuric and renoprotective effects of SGLT2 inhibition in diabetes. BTBR ob/ob mice that develop a type 2 diabetic nephropathy received a standard diet with or without empagliflozin for 10 weeks, starting at 8 weeks of age, when animals had developed albuminuria. Empagliflozin caused marked decreases in blood glucose levels and albuminuria but did not correct glomerular hyperfiltration. The protective effect of empagliflozin against albuminuria was not due to a reduction in podocyte damage since empagliflozin did not affect the larger podocyte filtration slit pore size nor the defective expression of nephrin and nestin. Empagliflozin did not reduce the thickening of the GBM. In BTBR ob/ob mice, the most profound abnormality seen using electron microscopy was in the endothelial aspect of the glomerular capillary, with significant loss of endothelial fenestrations. Remarkably, empagliflozin ameliorated the subverted microvascular endothelial ultrastructure. Caveolae and bridging diaphragms between adjacent endothelial fenestrae were seen in diabetic mice and associated with increased expression of caveolin-1 and the appearance of PV-1. These endothelial abnormalities were limited by the SGLT2 inhibitor. While no expression of SGLT2 was found in glomerular endothelial cells, SGLT2 was expressed in the podocytes of diabetic mice. VEGF-A which is a known stimulus for endothelial caveolin-1 and PV-1 was increased in podocytes of BTBR ob/ob mice and normalized by SGLT2 inhibitor treatment. Thus, empagliflozin's protective effect on the glomerular endothelium of diabetic mice could be due to a limitation of the paracrine signaling of podocyte-derived VEGF-A that resulted in a reduction of the abnormal endothelial caveolin-1 and PV-1, with the consequent preservation of glomerular endothelial function and permeability. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Monica Locatelli
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Carlamaria Zoja
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Sara Conti
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Domenico Cerullo
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Daniela Corna
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Daniela Rottoli
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Cristina Zanchi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Susanna Tomasoni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Giuseppe Remuzzi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Ariela Benigni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
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Perico L, Morigi M, Pezzotta A, Corna D, Brizi V, Conti S, Zanchi C, Sangalli F, Trionfini P, Buttò S, Xinaris C, Tomasoni S, Zoja C, Remuzzi G, Benigni A, Imberti B. Post-translational modifications by SIRT3 de-2-hydroxyisobutyrylase activity regulate glycolysis and enable nephrogenesis. Sci Rep 2021; 11:23580. [PMID: 34880332 PMCID: PMC8655075 DOI: 10.1038/s41598-021-03039-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 11/26/2021] [Indexed: 01/07/2023] Open
Abstract
Abnormal kidney development leads to lower nephron number, predisposing to renal diseases in adulthood. In embryonic kidneys, nephron endowment is dictated by the availability of nephron progenitors, whose self-renewal and differentiation require a relatively repressed chromatin state. More recently, NAD+-dependent deacetylase sirtuins (SIRTs) have emerged as possible regulators that link epigenetic processes to the metabolism. Here, we discovered a novel role for the NAD+-dependent deacylase SIRT3 in kidney development. In the embryonic kidney, SIRT3 was highly expressed only as a short isoform, with nuclear and extra-nuclear localisation. The nuclear SIRT3 did not act as deacetylase but exerted de-2-hydroxyisobutyrylase activity on lysine residues of histone proteins. Extra-nuclear SIRT3 regulated lysine 2-hydroxyisobutyrylation (Khib) levels of phosphofructokinase (PFK) and Sirt3 deficiency increased PFK Khib levels, inducing a glycolysis boost. This altered Khib landscape in Sirt3−/− metanephroi was associated with decreased nephron progenitors, impaired nephrogenesis and a reduced number of nephrons. These data describe an unprecedented role of SIRT3 in controlling early renal development through the regulation of epigenetics and metabolic processes.
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Affiliation(s)
- Luca Perico
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Marina Morigi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Anna Pezzotta
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Daniela Corna
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Valerio Brizi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Sara Conti
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Cristina Zanchi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Fabio Sangalli
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Piera Trionfini
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Sara Buttò
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Christodoulos Xinaris
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Susanna Tomasoni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Carlamaria Zoja
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Giuseppe Remuzzi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Ariela Benigni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Barbara Imberti
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy.
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Romano E, Trionfini P, Giampietro R, Benigni A, Tomasoni S. Generation of a homozygous CIITA knockout iPS cell line using the CRISPR-Cas9 system. Stem Cell Res 2021; 57:102580. [PMID: 34688128 PMCID: PMC8665218 DOI: 10.1016/j.scr.2021.102580] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 09/28/2021] [Accepted: 10/17/2021] [Indexed: 01/19/2023] Open
Abstract
Human induced pluripotent stem cells (iPSCs) have great promise in regenerative medicine. However, several limitations, including immune-incompatibility, have raised concerns regarding their clinical application. Recent studies have shown that human iPSCs and their derivatives lose their immunogenicity when major histocompatibility complex (MHC) class I and II genes are inactivated and CD47 is over-expressed. In this study, we used CRISPR-Cas9 technology to generate an isogenic iPSC line with a homozygous frameshift mutation in the MHC II transactivator (CIITA) gene. The CIITA-/- iPSCs exhibit typical morphology of pluripotent cells, normal karyotype, expression of pluripotency markers and differentiation capacity in the three germ layers.
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Affiliation(s)
- Elena Romano
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Piera Trionfini
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy.
| | - Roberta Giampietro
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Ariela Benigni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Susanna Tomasoni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy.
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Perico L, Tomasoni S, Peracchi T, Perna A, Pezzotta A, Remuzzi G, Benigni A. COVID-19 and lombardy: TESTing the impact of the first wave of the pandemic. EBioMedicine 2020; 61:103069. [PMID: 33130396 PMCID: PMC7581396 DOI: 10.1016/j.ebiom.2020.103069] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 09/25/2020] [Accepted: 09/28/2020] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Italy was the first western country to experience a large Coronavirus Disease 2019 (COVID-19) outbreak and the province of Bergamo experienced one of the deadliest COVID-19 outbreaks in the world. Following the peak of the epidemic in mid-March, the curve has slowly fallen thanks to the strict lockdown imposed by the Italian government on 9th March 2020. METHODS We performed a cross-sectional study to assess the prevalence of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) infection in 423 workers in Bergamo province who returned to the workplace after the end of the Italian lockdown on 5th May 2020. To this end, we performed an enzyme-linked immunosorbent assay (ELISA) to detect the humoral response against SARS-CoV-2 and a nasopharyngeal swab to assess the presence of SARS-CoV-2 RNA by real-time reverse transcription polymerase chain reaction (rRT-PCR). As a secondary aim of the study, we validated a lateral flow immunochromatography assay (LFIA) for the detection of anti-SARS-CoV-2 antibodies. FINDINGS ELISA identified 38.5% positive subjects, of whom 51.5% were positive for both IgG and IgM, 47.3% were positive only for IgG, but only 1.2% were positive for IgM alone. Only 23 (5.4%) participants tested positive for SARS-CoV-2 by rRT-PCR, although with high cycle thresholds (between 34 and 39), indicating a very low residual viral load that was not able to infect cultured cells. All these rRT-PCR positive subjects had already experienced seroconversion. When the ELISA was used as the comparator, the estimated specificity and sensitivity of the rapid LFIA for IgG were 98% and 92%, respectively. INTERPRETATION the prevalence of SARS-CoV-2 infection in the province of Bergamo reached 38.5%, significantly higher than has been reported for most other regions worldwide. Few nasopharyngeal swabs tested positive in fully recovered subjects, though with a very low SARS-CoV-2 viral load, with implications for infectivity and discharge policies for positive individuals in the post-pandemic period. The rapid LFIA used in this study is a valuable tool for rapid serologic surveillance of COVID-19 for population studies. FUNDING The study was supported by Regione Lombardia, Milano Serravalle - Milano Tangenziali S.p.A., Brembo S.p.A, and by MEI System.
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Affiliation(s)
- Luca Perico
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Susanna Tomasoni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Tobia Peracchi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Annalisa Perna
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Anna Pezzotta
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Giuseppe Remuzzi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy; Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy.
| | - Ariela Benigni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
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11
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Remuzzi A, Conti S, Ene-Iordache B, Tomasoni S, Rizzo P, Benigni A, Remuzzi G. Role of ultrastructural determinants of glomerular permeability in ultrafiltration function loss. JCI Insight 2020; 5:137249. [PMID: 32641585 DOI: 10.1172/jci.insight.137249] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 02/12/2020] [Accepted: 05/27/2020] [Indexed: 11/17/2022] Open
Abstract
The epithelial filtration slit is a crucial component of the glomerular capillary membrane, which is essential for maintaining glomerular filtration function. Though chronic kidney diseases are an immense clinical problem, the mechanisms through which structural alterations reduce glomerular water filtration have not yet been understood completely. To investigate the mechanisms underlying filtration function loss, we studied rats with spontaneously occurring progressive kidney disease, either treated with angiotensin II antagonist or untreated, combining high-resolution electron microscopy of the glomerular capillary wall with theoretical water filtration modeling. Under pathological conditions, epithelial filtration pores and the extension of the subpodocyte space were larger than in normal controls. Numerical analyses indicated that these ultrastructural changes increased hydraulic resistance of the glomerular capillary wall by extending coverage of the filtration barrier by the subpodocyte space, with the changes in hydrodynamic forces acting on podocytes likely being responsible for their detachment. Angiotensin II inhibition normalized the subpodocyte space's hydraulic resistance, restored mechanical podocyte load, and preserved CD151-α3 integrin complex assembly, improving podocyte adherence and survival. Our results show that ultrastructural changes in podocytes are major determinants of the hydraulic resistance of the glomerular capillary wall and highlight the mechanism of podocyte loss in kidney disease progression, as well as the mechanisms underlying angiotensin II inhibition.
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Affiliation(s)
| | - Sara Conti
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | | | - Susanna Tomasoni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Paola Rizzo
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Ariela Benigni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Giuseppe Remuzzi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy.,L. Sacco Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
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12
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Romano E, Trionfini P, Ciampi O, Benigni A, Tomasoni S. Generation of PKD1 mono-allelic and bi-allelic knockout iPS cell lines using CRISPR-Cas9 system. Stem Cell Res 2020; 47:101881. [PMID: 32592954 DOI: 10.1016/j.scr.2020.101881] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 05/29/2020] [Accepted: 06/16/2020] [Indexed: 11/20/2022] Open
Abstract
Autosomal dominant polycystic kidney disease (ADPKD) is the most common hereditary kidney disease, characterised by the development of multiple fluid-filled cysts in the kidneys and other organs. PKD1 and PKD2 are the two major causative genes encoding for polycystin-1 and polycystin-2, respectively. Here, we report the generation of two isogenic induced pluripotent stem cell (iPSC) lines with either heterozygous or compound heterozygous mutations in the PKD1 gene using CRISPR-Cas9 technology. The PKD1+/- and PKD1-/- iPSCs maintain stem cell-like morphology, normal karyotype, pluripotency and differentiation capacity in the three germ layers.
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Affiliation(s)
- Elena Romano
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Piera Trionfini
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Osele Ciampi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Ariela Benigni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Susanna Tomasoni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy.
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13
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Trionfini P, Ciampi O, Todeschini M, Ascanelli C, Longaretti L, Perico L, Remuzzi G, Benigni A, Tomasoni S. CRISPR-Cas9-Mediated Correction of the G189R-PAX2 Mutation in Induced Pluripotent Stem Cells from a Patient with Focal Segmental Glomerulosclerosis. CRISPR J 2020; 2:108-120. [PMID: 30998089 DOI: 10.1089/crispr.2018.0048] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Focal segmental glomerulosclerosis (FSGS) is defined by focal (involving few glomeruli) and segmental sclerosis of the glomerular tuft that manifests with nephrotic syndrome. Mutations in genes involved in the maintenance of structure and function of podocytes have been found in a minority of these patients. A family with adult-onset autosomal dominant FSGS was recently found to carry a new germline missense heterozygous mutation (p.G189R) in the octapeptide domain of the transcription factor PAX2. Here, we efficiently corrected this point mutation in patient-derived induced pluripotent stem cells (iPSCs) by means of CRISPR-Cas9-based homology-directed repair. The iPSC lines were differentiated into podocytes, which were tested for their motility. Editing the PAX2 p.G189R mutation restored podocyte motility, which was altered in podocytes derived from patient iPSCs.
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Affiliation(s)
- Piera Trionfini
- 1 Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy; University of Milan, Milan, Italy
| | - Osele Ciampi
- 1 Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy; University of Milan, Milan, Italy
| | - Marta Todeschini
- 1 Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy; University of Milan, Milan, Italy
| | - Camilla Ascanelli
- 1 Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy; University of Milan, Milan, Italy
| | - Lorena Longaretti
- 1 Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy; University of Milan, Milan, Italy
| | - Luca Perico
- 1 Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy; University of Milan, Milan, Italy
| | - Giuseppe Remuzzi
- 1 Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy; University of Milan, Milan, Italy.,2 L. Sacco' Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
| | - Ariela Benigni
- 1 Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy; University of Milan, Milan, Italy
| | - Susanna Tomasoni
- 1 Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy; University of Milan, Milan, Italy
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14
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Benigni A, Cassis P, Conti S, Perico L, Corna D, Cerullo D, Zentilin L, Zoja C, Perna A, Lionetti V, Giacca M, Trionfini P, Tomasoni S, Remuzzi G. Sirt3 Deficiency Shortens Life Span and Impairs Cardiac Mitochondrial Function Rescued by Opa1 Gene Transfer. Antioxid Redox Signal 2019; 31:1255-1271. [PMID: 31269804 DOI: 10.1089/ars.2018.7703] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Aims: Sirtuins, a family of NAD+-dependent deacetylases, are recognized as nondispensable regulators of aging processes. Sirtuin 3 (SIRT3) is the main mitochondrial deacetylase that maintains mitochondrial bioenergetics, an essential prerequisite for healthy aging. In this study, using Sirt3 knockout (Sirt3-/-) mice, we sought to establish whether Sirt3 deficiency affected life span, an endpoint that has never been tested formally in mammals, and uncover the mechanisms involved in organ damage associated with aging. Results:Sirt3-/- mice experienced a shorter life span than wild-type mice and severe cardiac damage, characterized by hypertrophy and fibrosis, as they aged. No alterations were found in organs other than the heart. Sirt3 deficiency altered cardiac mitochondrial bioenergetics and caused hyperacetylation of optic atrophy 1 (OPA1), a SIRT3 target. These changes were associated with aberrant alignment of trans-mitochondrial cristae in cardiomyocytes, and cardiac dysfunction. Gene transfer of deacetylated Opa1 restored cristae alignment in Sirt3-/- mice, ameliorated cardiac reserve capacity, and protected the heart against hypertrophy and fibrosis. The translational relevance of these findings is in the data showing that SIRT3 silencing in human-induced pluripotent stem cell-derived cardiomyocytes led to mitochondrial dysfunction and altered contractile phenotype, both rescued by Opa1 gene transfer. Innovation: Our findings indicate that future approaches to heart failure could include SIRT3 as a plausible therapeutic target. Conclusion: SIRT3 has a major role in regulating mammalian life span. Sirt3 deficiency leads to cardiac abnormalities, due to defective trans-mitochondrial cristae alignment and impaired mitochondrial bioenergetics. Correcting cardiac OPA1 hyperacetylation through gene transfer diminished heart failure in Sirt3-/- mice during aging. Antioxid. Redox Signal. 31, 1255-1271.
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Affiliation(s)
- Ariela Benigni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Paola Cassis
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Sara Conti
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Luca Perico
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Daniela Corna
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Domenico Cerullo
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Lorena Zentilin
- Molecular Medicine Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy
| | - Carlamaria Zoja
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Annalisa Perna
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Vincenzo Lionetti
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy.,UOS Anesthesia and Intensive Care, Fondazione Toscana "G. Monasterio", Pisa, Italy
| | - Mauro Giacca
- Molecular Medicine Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy.,Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
| | - Piera Trionfini
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Susanna Tomasoni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Giuseppe Remuzzi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy.,L. Sacco' Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
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15
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Trionfini P, Ciampi O, Romano E, Benigni A, Tomasoni S. Generation of two isogenic knockout PKD2 iPS cell lines, IRFMNi003-A-1 and IRFMNi003-A-2, using CRISPR/Cas9 technology. Stem Cell Res 2019; 42:101667. [PMID: 31830647 DOI: 10.1016/j.scr.2019.101667] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 11/11/2019] [Accepted: 11/21/2019] [Indexed: 10/25/2022] Open
Abstract
Autosomal dominant polycystic kidney disease (ADPKD) is the most prevalent inherited renal disease, characterized by multiple cysts that can lead to kidney failure resulting in end-stage renal disease. ADPKD is mainly caused by mutations in either the PKD1 and PKD2 genes, encoding for polycystin-1 and polycystin-2, respectively. In order to clarify the disease mechanisms, here we describe the generation of two isogenic induced pluripotent stem cell (iPSC) lines in which the PKD2 gene was deleted using CRISPR/Cas9 technology. The PKD2-/- iPSCs expressed the main pluripotency markers, were able to differentiate into the three germ layers and had a normal karyotype.
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Affiliation(s)
- Piera Trionfini
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano, 87, 24126 Bergamo, Italy
| | - Osele Ciampi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano, 87, 24126 Bergamo, Italy
| | - Elena Romano
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano, 87, 24126 Bergamo, Italy
| | - Ariela Benigni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano, 87, 24126 Bergamo, Italy
| | - Susanna Tomasoni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano, 87, 24126 Bergamo, Italy.
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16
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Ciampi O, Bonandrini B, Derosas M, Conti S, Rizzo P, Benedetti V, Figliuzzi M, Remuzzi A, Benigni A, Remuzzi G, Tomasoni S. Engineering the vasculature of decellularized rat kidney scaffolds using human induced pluripotent stem cell-derived endothelial cells. Sci Rep 2019; 9:8001. [PMID: 31142801 PMCID: PMC6541625 DOI: 10.1038/s41598-019-44393-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 05/15/2019] [Indexed: 01/18/2023] Open
Abstract
Generating new kidneys using tissue engineering technologies is an innovative strategy for overcoming the shortage of donor organs for transplantation. Here we report how to efficiently engineer the kidney vasculature of decellularized rat kidney scaffolds by using human induced pluripotent stem cell (hiPSCs)-derived endothelial cells (hiPSC-ECs). In vitro, hiPSC-ECs responded to flow stress by acquiring an alignment orientation, and attached to and proliferated on the acellular kidney sections, maintaining their phenotype. The hiPSC-ECs were able to self-organize into chimeric kidney organoids to form vessel-like structures. Ex vivo infusion of hiPSC-ECs through the renal artery and vein of acellular kidneys resulted in the uniform distribution of the cells in all the vasculature compartments, from glomerular capillaries to peritubular capillaries and small vessels. Ultrastructural analysis of repopulated scaffolds through transmission and scanning electron microscopy demonstrated the presence of continuously distributed cells along the vessel wall, which was also confirmed by 3D reconstruction of z-stack images showing the continuity of endothelial cell coverage inside the vessels. Notably, the detection of fenestrae in the endothelium of glomerular capillaries but not in the vascular capillaries was clear evidence of site-specific endothelial cell specialisation.
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Affiliation(s)
- Osele Ciampi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126, Bergamo, Italy
| | - Barbara Bonandrini
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126, Bergamo, Italy.,Department of Chemistry, Materials and Chemical Engineering Giulio Natta, Politecnico di Milano, 20133, Milan, Italy
| | - Manuela Derosas
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126, Bergamo, Italy
| | - Sara Conti
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126, Bergamo, Italy
| | - Paola Rizzo
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126, Bergamo, Italy
| | - Valentina Benedetti
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126, Bergamo, Italy
| | - Marina Figliuzzi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126, Bergamo, Italy
| | - Andrea Remuzzi
- Department of Industrial Engineering, Bergamo University, 24044, Dalmine, Bergamo, Italy
| | - Ariela Benigni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126, Bergamo, Italy
| | - Giuseppe Remuzzi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126, Bergamo, Italy.,L. Sacco Department of Biomedical and Clinical Sciences, University of Milan, 20122, Milan, Italy
| | - Susanna Tomasoni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126, Bergamo, Italy.
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17
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Ciampi O, Romano E, Benigni A, Tomasoni S. Generation of two isogenic iPS cell lines (IRFMNi002-A and IRFMNi002-B) from a patient affected by Focal Segmental Glomerulosclerosis carrying a heterozygous c.565G>A mutation in PAX2 gene. Stem Cell Res 2018; 33:175-179. [PMID: 30399566 PMCID: PMC6288238 DOI: 10.1016/j.scr.2018.10.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 10/05/2018] [Accepted: 10/24/2018] [Indexed: 11/23/2022] Open
Abstract
Focal Segmental Glomerulosclerosis (FSGS) is the typical renal histologic lesion in familial steroid-resistant nephrotic syndrome, for which there is currently no treatment. Dysfunction of the glomerular podocyte, a specialized cell that forms the glomerular filtration barrier, is central in the pathogenesis of FSGS. Here, we reported the generation of two isogenic iPS cell lines from a patient affected by FSGS, carrying the c.565G > A mutation in the PAX2 gene. The iPS cell lines we generated expressed pluripotency markers at the mRNA and protein levels and differentiated into all three germ layers. These iPSCs will be instrumental in understanding FSGS pathogenesis.
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Affiliation(s)
- Osele Ciampi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Elena Romano
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Ariela Benigni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Susanna Tomasoni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy.
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18
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Benedetti V, Brizi V, Guida P, Tomasoni S, Ciampi O, Angeli E, Valbusa U, Benigni A, Remuzzi G, Xinaris C. Engineered Kidney Tubules for Modeling Patient-Specific Diseases and Drug Discovery. EBioMedicine 2018; 33:253-268. [PMID: 30049385 PMCID: PMC6085557 DOI: 10.1016/j.ebiom.2018.06.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 05/25/2018] [Accepted: 06/06/2018] [Indexed: 12/18/2022] Open
Abstract
The lack of engineering systems able to faithfully reproduce complex kidney structures in vitro has made it difficult to efficiently model kidney diseases and development. Using polydimethylsiloxane (PDMS) scaffolds and a kidney-derived cell line we developed a system to rapidly engineer custom-made 3D tubules with typical renal epithelial properties. This system was successfully employed to engineer patient-specific tubules, to model polycystic kidney disease (PKD) and test drug efficacy, and to identify a potential new pharmacological treatment. By optimizing our system we constructed functional ureteric bud (UB)-like tubules from human induced pluripotent stem cells (iPSCs), and identified a combination of growth factors that induces budding morphogenesis like embryonic kidneys do. Finally, we applied this assay to investigate budding defects in UB-like tubules derived from a patient with a PAX2 mutation. Our system enables the modeling of human kidney disease and development, drug testing and discovery, and lays the groundwork for engineering anatomically correct kidney tissues in vitro and developing personalized medicine applications.
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Affiliation(s)
- Valentina Benedetti
- IRCCS - Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Valerio Brizi
- IRCCS - Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Patrizia Guida
- Nanomed Laboratories, Dipartimento di Fisica, Università di Genova, 16146 Genova, Italy
| | - Susanna Tomasoni
- IRCCS - Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Osele Ciampi
- IRCCS - Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Elena Angeli
- Nanomed Laboratories, Dipartimento di Fisica, Università di Genova, 16146 Genova, Italy
| | - Ugo Valbusa
- Nanomed Laboratories, Dipartimento di Fisica, Università di Genova, 16146 Genova, Italy
| | - Ariela Benigni
- IRCCS - Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Giuseppe Remuzzi
- IRCCS - Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy; 'L. Sacco' Department of Biomedical and Clinical Sciences, University of Milan, 20157 Milan, Italy; Unit of Nephrology and Dialysis, Azienda Socio-Sanitaria Territoriale (ASST) Papa Giovanni XXIII, 24127 Bergamo, Italy
| | - Christodoulos Xinaris
- IRCCS - Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy.
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19
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Aiello S, Rocchetta F, Longaretti L, Faravelli S, Todeschini M, Cassis L, Pezzuto F, Tomasoni S, Azzollini N, Mister M, Mele C, Conti S, Breno M, Remuzzi G, Noris M, Benigni A. Extracellular vesicles derived from T regulatory cells suppress T cell proliferation and prolong allograft survival. Sci Rep 2017; 7:11518. [PMID: 28912528 PMCID: PMC5599553 DOI: 10.1038/s41598-017-08617-3] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Accepted: 07/11/2017] [Indexed: 12/28/2022] Open
Abstract
We have previously shown that rat allogeneic DC, made immature by adenoviral gene transfer of the dominant negative form of IKK2, gave rise in-vitro to a unique population of CD4+CD25− regulatory T cells (dnIKK2-Treg). These cells inhibited Tcell response in-vitro, without needing cell-to-cell contact, and induced kidney allograft survival prolongation in-vivo. Deep insight into the mechanisms behind dnIKK2-Treg-induced suppression of Tcell proliferation remained elusive. Here we document that dnIKK2-Treg release extracellular vesicles (EV) riched in exosomes, fully accounting for the cell-contact independent immunosuppressive activity of parent cells. DnIKK2-Treg-EV contain a unique molecular cargo of specific miRNAs and iNOS, which, once delivered into target cells, blocked cell cycle progression and induced apoptosis. DnIKK2-Treg-EV-exposed T cells were in turn converted into regulatory cells. Notably, when administered in-vivo, dnIKK2-Treg-EV prolonged kidney allograft survival. DnIKK2-Treg-derived EV could be a tool for manipulating the immune system and for discovering novel potential immunosuppressive molecules in the context of allotransplantation.
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Affiliation(s)
- Sistiana Aiello
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Ricerche Trapianti Chiara Cucchi de Alessandri e Gilberto Crespi Ranica, Bergamo, Italy
| | - Federica Rocchetta
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Ricerche Trapianti Chiara Cucchi de Alessandri e Gilberto Crespi Ranica, Bergamo, Italy
| | - Lorena Longaretti
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Ricerche Trapianti Chiara Cucchi de Alessandri e Gilberto Crespi Ranica, Bergamo, Italy
| | - Silvia Faravelli
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Ricerche Trapianti Chiara Cucchi de Alessandri e Gilberto Crespi Ranica, Bergamo, Italy
| | - Marta Todeschini
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Ricerche Trapianti Chiara Cucchi de Alessandri e Gilberto Crespi Ranica, Bergamo, Italy
| | - Linda Cassis
- Institut Hospital del Mar d'Investigacions Mèdiques, Barcelona, Spain
| | - Francesca Pezzuto
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Ricerche Trapianti Chiara Cucchi de Alessandri e Gilberto Crespi Ranica, Bergamo, Italy
| | - Susanna Tomasoni
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Ricerche Trapianti Chiara Cucchi de Alessandri e Gilberto Crespi Ranica, Bergamo, Italy
| | - Nadia Azzollini
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Ricerche Trapianti Chiara Cucchi de Alessandri e Gilberto Crespi Ranica, Bergamo, Italy
| | - Marilena Mister
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Ricerche Trapianti Chiara Cucchi de Alessandri e Gilberto Crespi Ranica, Bergamo, Italy
| | - Caterina Mele
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Ricerche Trapianti Chiara Cucchi de Alessandri e Gilberto Crespi Ranica, Bergamo, Italy
| | - Sara Conti
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Ricerche Trapianti Chiara Cucchi de Alessandri e Gilberto Crespi Ranica, Bergamo, Italy
| | - Matteo Breno
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Ricerche Trapianti Chiara Cucchi de Alessandri e Gilberto Crespi Ranica, Bergamo, Italy
| | - Giuseppe Remuzzi
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Ricerche Trapianti Chiara Cucchi de Alessandri e Gilberto Crespi Ranica, Bergamo, Italy.,Unit of Nephrology and Dialyisis Azienda Socio Sanitaria Territoriale (ASST) Papa Giovanni XXIII, Bergamo, Italy.,Unit of Nephrology and Dialyisis, Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
| | - Marina Noris
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Ricerche Trapianti Chiara Cucchi de Alessandri e Gilberto Crespi Ranica, Bergamo, Italy.
| | - Ariela Benigni
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Ricerche Trapianti Chiara Cucchi de Alessandri e Gilberto Crespi Ranica, Bergamo, Italy
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20
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Zanchi C, Macconi D, Trionfini P, Tomasoni S, Rottoli D, Locatelli M, Rudnicki M, Vandesompele J, Mestdagh P, Remuzzi G, Benigni A, Zoja C. MicroRNA-184 is a downstream effector of albuminuria driving renal fibrosis in rats with diabetic nephropathy. Diabetologia 2017; 60:1114-1125. [PMID: 28364255 PMCID: PMC5423990 DOI: 10.1007/s00125-017-4248-9] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 02/23/2017] [Indexed: 02/01/2023]
Abstract
AIMS/HYPOTHESIS Renal fibrosis is a common complication of diabetic nephropathy and is a major cause of end-stage renal disease. Despite the suggested link between renal fibrosis and microRNA (miRNA) dysregulation in diabetic nephropathy, the identification of the specific miRNAs involved is still incomplete. The aim of this study was to investigate miRNA profiles in the diabetic kidney and to identify potential downstream targets implicated in renal fibrosis. METHODS miRNA expression profiling was investigated in the kidneys of 8-month-old Zucker diabetic fatty (ZDF) rats during overt nephropathy. Localisation of the most upregulated miRNA was established by in situ hybridisation. The candidate miRNA target was identified by in silico analysis and its expression documented in the diabetic kidney associated with fibrotic markers. Cultured tubule cells served to assess which of the profibrogenic stimuli acted as a trigger for the overexpressed miRNA, and to investigate underlying epigenetic mechanisms. RESULTS In ZDF rats, miR-184 showed the strongest differential upregulation compared with lean rats (18-fold). Tubular localisation of miR-184 was associated with reduced expression of lipid phosphate phosphatase 3 (LPP3) and collagen accumulation. Transfection of NRK-52E cells with miR-184 mimic reduced LPP3, promoting a profibrotic phenotype. Albumin was a major trigger of miR-184 expression. Anti-miR-184 counteracted albumin-induced LPP3 downregulation and overexpression of plasminogen activator inhibitor-1. In ZDF rats, ACE-inhibitor treatment limited albuminuria and reduced miR-184, with tubular LPP3 preservation and tubulointerstitial fibrosis amelioration. Albumin-induced miR-184 expression in tubule cells was epigenetically regulated through DNA demethylation and histone lysine acetylation and was accompanied by binding of NF-κB p65 subunit to miR-184 promoter. CONCLUSIONS/INTERPRETATION These results suggest that miR-184 may act as a downstream effector of albuminuria through LPP3 to promote tubulointerstitial fibrosis, and offer the rationale to investigate whether targeting miR-184 in association with albuminuria-lowering drugs may be a new strategy to achieve fully anti-fibrotic effects in diabetic nephropathy.
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Affiliation(s)
- Cristina Zanchi
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Daniela Macconi
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Piera Trionfini
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Susanna Tomasoni
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Daniela Rottoli
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Monica Locatelli
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Michael Rudnicki
- Medical University Innsbruck, Department of Internal Medicine IV-Nephrology and Hypertension, Innsbruck, Austria
| | | | | | - Giuseppe Remuzzi
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
- Unit of Nephrology and Dialysis, Azienda Socio Sanitaria Territoriale (ASST) Papa Giovanni XXIII, Bergamo, Italy
- Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
| | - Ariela Benigni
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy
| | - Carlamaria Zoja
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano 87, 24126, Bergamo, Italy.
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21
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Tomasoni S, Trionfini P, Azzollini N, Zentilin L, Giacca M, Aiello S, Longaretti L, Cozzi E, Baldan N, Remuzzi G, Benigni A. AAV9-mediated engineering of autotransplanted kidney of non-human primates. Gene Ther 2017; 24:308-313. [PMID: 28346435 DOI: 10.1038/gt.2017.21] [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] [Received: 12/06/2016] [Revised: 02/21/2017] [Accepted: 03/16/2017] [Indexed: 11/09/2022]
Abstract
Ex vivo gene transfer to the graft before transplantation is an attractive option for circumventing systemic side effects of chronic antirejection therapy. Gene delivery of the immunomodulatory protein cytotoxic T-lymphocyte-associated protein 4-immunoglobulin (CTLA4-Ig) prevented chronic kidney rejection in a rat model of allotransplantation without the need for systemic immunosuppression. Here we generated adeno-associated virus type 2 (AAV2) and AAV9 vectors encoding for LEA29Y, an optimized version of CTLA4-Ig. Both LEA29Y vectors were equally efficient for reducing T-cell proliferation in vitro. Serotype 9 was chosen for in vivo experiments owing to a lower frequency of preformed antibodies against the AAV9 capsid in 16 non-human primate tested sera. AAV9-LEA29Y was able to transduce the kidney of non-human primates in an autotransplantation model. Expression of LEA29Y mRNA by renal cells translated into the production of the corresponding protein, which was confined to the graft but not detected in serum. Results in non-human primates represent a step forward in maintaining the portability of this strategy into clinics.
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Affiliation(s)
- S Tomasoni
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Bergamo, Italy
| | - P Trionfini
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Bergamo, Italy
| | - N Azzollini
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Bergamo, Italy
| | - L Zentilin
- Molecular Medicine Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy
| | - M Giacca
- Molecular Medicine Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy.,Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
| | - S Aiello
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Bergamo, Italy
| | - L Longaretti
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Bergamo, Italy
| | - E Cozzi
- Department of Cardiac, Thoracic and Vascular Sciences, Transplant Immunology Unit, Padua University Hospital, Padova, Italy.,Consortium for Research in Organ Transplantation (CORIT), Padua, Italy
| | - N Baldan
- Department of Surgical, Oncological and Gastroenterological Sciences, Padua University Hospital, Padova, Italy
| | - G Remuzzi
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Bergamo, Italy.,Unit of Nephrology and Dialysis, Azienda Socio-Sanitaria Territoriale (ASST) Papa Giovanni XXIII, Bergamo, Italy.,Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
| | - A Benigni
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Bergamo, Italy
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22
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Xinaris C, Benedetti V, Novelli R, Abbate M, Rizzo P, Conti S, Tomasoni S, Corna D, Pozzobon M, Cavallotti D, Yokoo T, Morigi M, Benigni A, Remuzzi G. Functional Human Podocytes Generated in Organoids from Amniotic Fluid Stem Cells. J Am Soc Nephrol 2015; 27:1400-11. [PMID: 26516208 DOI: 10.1681/asn.2015030316] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 08/03/2015] [Indexed: 12/11/2022] Open
Abstract
Generating kidney organoids using human stem cells could offer promising prospects for research and therapeutic purposes. However, no cell-based strategy has generated nephrons displaying an intact three-dimensional epithelial filtering barrier. Here, we generated organoids using murine embryonic kidney cells, and documented that these tissues recapitulated the complex three-dimensional filtering structure of glomerular slits in vivo and accomplished selective glomerular filtration and tubular reabsorption. Exploiting this technology, we mixed human amniotic fluid stem cells with mouse embryonic kidney cells to establish three-dimensional chimeric organoids that engrafted in vivo and grew to form vascularized glomeruli and tubular structures. Human cells contributed to the formation of glomerular structures, differentiated into podocytes with slit diaphragms, and internalized exogenously infused BSA, thus attaining in vivo degrees of specialization and function unprecedented for donor stem cells. In conclusion, human amniotic fluid stem cell chimeric organoids may offer new paths for studying renal development and human podocyte disease, and for facilitating drug discovery and translational research.
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Affiliation(s)
- Christodoulos Xinaris
- IRCCS-Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy;
| | - Valentina Benedetti
- IRCCS-Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Rubina Novelli
- IRCCS-Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Mauro Abbate
- IRCCS-Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Paola Rizzo
- IRCCS-Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Sara Conti
- IRCCS-Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Susanna Tomasoni
- IRCCS-Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Daniela Corna
- IRCCS-Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Michela Pozzobon
- Stem Cells and Regenerative Medicine Laboratory, Foundation Institute of Pediatric Research Fondazione Città della Speranza, Padua, Italy
| | - Daniela Cavallotti
- IRCCS-Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Takashi Yokoo
- The Jikei University School of Medicine, Tokyo, Japan
| | - Marina Morigi
- IRCCS-Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Ariela Benigni
- IRCCS-Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Giuseppe Remuzzi
- IRCCS-Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy; Unit of Nephrology and Dialysis, Azienda Ospedaliera Papa Giovanni XXIII, Bergamo, Italy; and Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
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23
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Remuzzi A, Sangalli F, Macconi D, Tomasoni S, Cattaneo I, Rizzo P, Bonandrini B, Bresciani E, Longaretti L, Gagliardini E, Conti S, Benigni A, Remuzzi G. Regression of Renal Disease by Angiotensin II Antagonism Is Caused by Regeneration of Kidney Vasculature. J Am Soc Nephrol 2015; 27:699-705. [PMID: 26116358 DOI: 10.1681/asn.2014100971] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [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: 10/07/2014] [Accepted: 05/04/2015] [Indexed: 12/31/2022] Open
Abstract
Chronic renal insufficiency inexorably progresses in patients, such as it does after partial renal ablation in rats. However, the progression of renal diseases can be delayed by angiotensin II blockers that stabilize renal function or increase GFR, even in advanced phases of the disease. Regression of glomerulosclerosis can be induced by angiotensin II antagonism, but the effect of these treatments on the entire vascular tree is unclear. Here, using microcomputed tomography and scanning electron microscopy, we compared the size and extension of kidney blood vessels in untreated Wistar rats with those in untreated and angiotensin II antagonist-treated Munich Wistar Frömter (MWF) rats that spontaneously develop kidney disease with age. The kidney vasculature underwent progressive rarefaction in untreated MWF rats, substantially affecting intermediate and small vessels. Microarray analysis showed increased Tgf-β and endothelin-1 gene expression with age. Notably, 10-week inhibition of the renin-angiotensin system regenerated kidney vasculature and normalized Tgf-β and endothelin-1 gene expression in aged MWF rats. These changes were associated with reduced apoptosis, increased endothelial cell proliferation, and restoration of Nrf2 expression, suggesting mechanisms by which angiotensin II antagonism mediates regeneration of capillary segments. These results have important implications in the clinical setting of chronic renal insufficiency.
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Affiliation(s)
- Andrea Remuzzi
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso Bergamo, Italy; Department of Industrial Engineering, Bergamo University, Dalmine (Bergamo), Italy; and
| | - Fabio Sangalli
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso Bergamo, Italy
| | - Daniela Macconi
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso Bergamo, Italy
| | - Susanna Tomasoni
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso Bergamo, Italy
| | - Irene Cattaneo
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso Bergamo, Italy
| | - Paola Rizzo
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso Bergamo, Italy
| | - Barbara Bonandrini
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso Bergamo, Italy
| | - Elena Bresciani
- Department of Industrial Engineering, Bergamo University, Dalmine (Bergamo), Italy; and
| | - Lorena Longaretti
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso Bergamo, Italy
| | - Elena Gagliardini
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso Bergamo, Italy
| | - Sara Conti
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso Bergamo, Italy
| | - Ariela Benigni
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso Bergamo, Italy
| | - Giuseppe Remuzzi
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso Bergamo, Italy; Unit of Nephrology and Dialysis, Azienda Ospedaliera Papa Giovanni XXIII, Bergamo, Italy
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24
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Imberti B, Tomasoni S, Ciampi O, Pezzotta A, Derosas M, Xinaris C, Rizzo P, Papadimou E, Novelli R, Benigni A, Remuzzi G, Morigi M. Renal progenitors derived from human iPSCs engraft and restore function in a mouse model of acute kidney injury. Sci Rep 2015; 5:8826. [PMID: 25744951 PMCID: PMC4351529 DOI: 10.1038/srep08826] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Accepted: 02/05/2015] [Indexed: 12/19/2022] Open
Abstract
Acute kidney injury (AKI) is one of the most relevant health issues, leading to millions of deaths. The magnitude of the phenomenon remarks the urgent need for innovative and effective therapeutic approaches. Cell-based therapy with renal progenitor cells (RPCs) has been proposed as a possible strategy. Studies have shown the feasibility of directing embryonic stem cells or induced Pluripotent Stem Cells (iPSCs) towards nephrogenic intermediate mesoderm and metanephric mesenchyme (MM). However, the functional activity of iPSC-derived RPCs has not been tested in animal models of kidney disease. Here, through an efficient inductive protocol, we directed human iPSCs towards RPCs that robustly engrafted into damaged tubuli and restored renal function and structure in cisplatin-mice with AKI. These results demonstrate that iPSCs are a valuable source of engraftable cells with regenerative activity for kidney disease and create the basis for future applications in stem cell-based therapy.
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Affiliation(s)
- Barbara Imberti
- 1] IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, ITALY [2] Fondazione IRCCS - Policlinico San Matteo, 27100 Pavia, ITALY
| | - Susanna Tomasoni
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, ITALY
| | - Osele Ciampi
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, ITALY
| | - Anna Pezzotta
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, ITALY
| | - Manuela Derosas
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, ITALY
| | - Christodoulos Xinaris
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, ITALY
| | - Paola Rizzo
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, ITALY
| | - Evangelia Papadimou
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, ITALY
| | - Rubina Novelli
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, ITALY
| | - Ariela Benigni
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, ITALY
| | - Giuseppe Remuzzi
- 1] IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, ITALY [2] Unit of Nephrology and Dialysis, Azienda Ospedaliera Papa Giovanni XXIII, 24127 Bergamo, ITALY
| | - Marina Morigi
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, ITALY
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25
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Papadimou E, Morigi M, Iatropoulos P, Xinaris C, Tomasoni S, Benedetti V, Longaretti L, Rota C, Todeschini M, Rizzo P, Introna M, Grazia de Simoni M, Remuzzi G, Goligorsky MS, Benigni A. Direct reprogramming of human bone marrow stromal cells into functional renal cells using cell-free extracts. Stem Cell Reports 2015; 4:685-98. [PMID: 25754206 PMCID: PMC4400646 DOI: 10.1016/j.stemcr.2015.02.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Revised: 02/03/2015] [Accepted: 02/04/2015] [Indexed: 12/15/2022] Open
Abstract
The application of cell-based therapies in regenerative medicine is gaining recognition. Here, we show that human bone marrow stromal cells (BMSCs), also known as bone-marrow-derived mesenchymal cells, can be reprogrammed into renal proximal tubular-like epithelial cells using cell-free extracts. Streptolysin-O-permeabilized BMSCs exposed to HK2-cell extracts underwent morphological changes—formation of “domes” and tubule-like structures—and acquired epithelial functional properties such as transepithelial-resistance, albumin-binding, and uptake and specific markers E-cadherin and aquaporin-1. Transmission electron microscopy revealed the presence of brush border microvilli and tight intercellular contacts. RNA sequencing showed tubular epithelial transcript abundance and revealed the upregulation of components of the EGFR pathway. Reprogrammed BMSCs integrated into self-forming kidney tissue and formed tubular structures. Reprogrammed BMSCs infused in immunodeficient mice with cisplatin-induced acute kidney injury engrafted into proximal tubuli, reduced renal injury and improved function. Thus, reprogrammed BMSCs are a promising cell resource for future cell therapy. BMSCs cross lineage boundaries toward renal cells via cell-extract reprogramming Reprogrammed BMSCs acquire proximal tubular-like epithelial cell properties Reprogrammed BMSCs integrate into proximal tubuli and protect mice from AKI
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Affiliation(s)
- Evangelia Papadimou
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy.
| | - Marina Morigi
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Paraskevas Iatropoulos
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri," Clinical Research Center for Rare Diseases "Aldo e Cele Daccò," 24020 Ranica, Italy
| | - Christodoulos Xinaris
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Susanna Tomasoni
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Valentina Benedetti
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Lorena Longaretti
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Cinzia Rota
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Marta Todeschini
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri," Clinical Research Center for Rare Diseases "Aldo e Cele Daccò," 24020 Ranica, Italy
| | - Paola Rizzo
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
| | - Martino Introna
- Laboratory of Cellular Therapy "G. Lanzani," USC Hematology, 24122 Bergamo, Italy
| | - Maria Grazia de Simoni
- Department of Neuroscience, IRCCS - Istituto di Ricerche Farmacologiche "Mario Negri," 20156 Milan, Italy
| | - Giuseppe Remuzzi
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy; IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri," Clinical Research Center for Rare Diseases "Aldo e Cele Daccò," 24020 Ranica, Italy; Unit of Nephrology and Dialysis, Azienda Ospedaliera Papa Giovanni XXIII, 24127 Bergamo, Italy.
| | - Michael S Goligorsky
- Department of Medicine, Renal Research Institute, New York Medical College, 15 Dana Road, BSB C-06, Valhalla, NY 10595, USA
| | - Ariela Benigni
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, 24126 Bergamo, Italy
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Locatelli M, Buelli S, Pezzotta A, Corna D, Perico L, Tomasoni S, Rottoli D, Rizzo P, Conti D, Thurman JM, Remuzzi G, Zoja C, Morigi M. Shiga toxin promotes podocyte injury in experimental hemolytic uremic syndrome via activation of the alternative pathway of complement. J Am Soc Nephrol 2014; 25:1786-98. [PMID: 24578132 DOI: 10.1681/asn.2013050450] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Shiga toxin (Stx)-producing Escherichia coli is the offending agent of postdiarrhea-associated hemolytic uremic syndrome (HUS), a disorder of glomerular ischemic damage and widespread microvascular thrombosis. We previously documented that Stx induces glomerular complement activation, generating C3a responsible for microvascular thrombosis in experimental HUS. Here, we show that the presence of C3 deposits on podocytes is associated with podocyte damage and loss in HUS mice generated by the coinjection of Stx2 and LPS. Because podocyte adhesion to the glomerular basement membrane is mediated by integrins, the relevance of integrin-linked kinase (ILK) signals in podocyte dysfunction was evaluated. Podocyte expression of ILK increased after the injection of Stx2/LPS and preceded the upregulation of Snail and downregulation of nephrin and α-actinin-4. Factor B deficiency or pretreatment with an inhibitory antibody to factor B protected mice against Stx2/LPS-induced podocyte dysregulation. Similarly, pretreatment with a C3a receptor antagonist limited podocyte loss and changes in ILK, Snail, and α-actinin-4 expression. In cultured podocytes, treatment with C3a reduced α-actinin-4 expression and promoted ILK-dependent nuclear expression of Snail and cell motility. These results suggest that Stx-induced activation of the alternative pathway of complement and generation of C3a promotes ILK signaling, leading to podocyte dysfunction and loss in Stx-HUS.
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Affiliation(s)
- Monica Locatelli
- IRCCS - Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Bergamo, Italy
| | - Simona Buelli
- IRCCS - Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Bergamo, Italy
| | - Anna Pezzotta
- IRCCS - Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Bergamo, Italy
| | - Daniela Corna
- IRCCS - Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Bergamo, Italy
| | - Luca Perico
- IRCCS - Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Bergamo, Italy
| | - Susanna Tomasoni
- IRCCS - Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Bergamo, Italy
| | - Daniela Rottoli
- IRCCS - Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Bergamo, Italy
| | - Paola Rizzo
- IRCCS - Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Bergamo, Italy
| | - Debora Conti
- IRCCS - Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Bergamo, Italy
| | - Joshua M Thurman
- Division of Nephrology and Hypertension, University of Colorado Denver School of Medicine, Aurora, Colorado; and
| | - Giuseppe Remuzzi
- IRCCS - Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Bergamo, Italy; Unit of Nephrology and Dialysis, Azienda Ospedaliera Papa Giovanni XXIII, Bergamo, Italy
| | - Carlamaria Zoja
- IRCCS - Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Bergamo, Italy
| | - Marina Morigi
- IRCCS - Istituto di Ricerche Farmacologiche "Mario Negri," Centro Anna Maria Astori, Bergamo, Italy;
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Gagliardini E, Perico N, Rizzo P, Buelli S, Longaretti L, Perico L, Tomasoni S, Zoja C, Macconi D, Morigi M, Remuzzi G, Benigni A. Angiotensin II contributes to diabetic renal dysfunction in rodents and humans via Notch1/Snail pathway. Am J Pathol 2013; 183:119-30. [PMID: 23707238 DOI: 10.1016/j.ajpath.2013.03.025] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Revised: 02/26/2013] [Accepted: 03/19/2013] [Indexed: 01/13/2023]
Abstract
In nondiabetic rat models of renal disease, angiotensin II (Ang II) perpetuates podocyte injury and promotes progression to end-stage kidney disease. Herein, we wanted to explore the role of Ang II in diabetic nephropathy by a translational approach spanning from in vitro to in vivo rat and human studies, and to dissect the intracellular pathways involved. In isolated perfused rat kidneys and in cultured human podocytes, Ang II down-regulated nephrin expression via Notch1 activation and nuclear translocation of Snail. Hairy enhancer of split-1 was a Notch1-downstream gene effector that activated Snail in cultured podocytes. In vitro changes of the Snail/nephrin axis were similar to those in renal biopsy specimens of Zucker diabetic fatty rats and patients with advanced diabetic nephropathy, and were normalized by pharmacological inhibition of the renin-angiotensin system. Collectively, the present studies provide evidence that Ang II plays a relevant role in perpetuating glomerular injury in experimental and human diabetic nephropathy via persistent activation of Notch1 and Snail signaling in podocytes, eventually resulting in down-regulation of nephrin expression, the integrity of which is crucial for the glomerular filtration barrier.
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Affiliation(s)
- Elena Gagliardini
- Mario Negri Institute of Pharmacology Research, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy
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Tomasoni S, Longaretti L, Rota C, Morigi M, Conti S, Gotti E, Capelli C, Introna M, Remuzzi G, Benigni A. Transfer of growth factor receptor mRNA via exosomes unravels the regenerative effect of mesenchymal stem cells. Stem Cells Dev 2012; 22:772-80. [PMID: 23082760 DOI: 10.1089/scd.2012.0266] [Citation(s) in RCA: 257] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Bone marrow-mesenchymal stem cells (BM-MSC) ameliorate renal dysfunction and repair tubular damage of acute kidney injury by locally releasing growth factors, including the insulin-like growth factor-1 (IGF-1). The restricted homing of BM-MSC at the site of injury led us to investigate a possible gene-based communication mechanism between BM-MSC and tubular cells. Human BM-MSC (hBM-MSC) released microparticles and exosomes (Exo) enriched in mRNAs. A selected pattern of transcripts was detected in Exo versus parental cells. Exo expressed the IGF-1 receptor (IGF-1R), but not IGF-1 mRNA, while hBM-MSC contained both mRNAs. R- cells lacking IGF-1R exposed to hBM-MSC-derived Exo acquired the human IGF-1R transcript that was translated in the corresponding protein. Transfer of IGF-1R mRNA from Exo to cisplatin-damaged proximal tubular cells (proximal tubular epithelial cell [PTEC]) increased PTEC proliferation. Coincubation of damaged PTEC with Exo and soluble IGF-1 further enhanced cell proliferation. These findings suggest that horizontal transfer of the mRNA for IGF-1R to tubular cells through Exo potentiates tubular cell sensitivity to locally produced IGF-1 providing a new mechanism underlying the powerful renoprotection of few BM-MSC observed in vivo.
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Affiliation(s)
- Susanna Tomasoni
- Mario Negri Institute for Pharmacological Research, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy.
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Macconi D, Tomasoni S, Romagnani P, Trionfini P, Sangalli F, Mazzinghi B, Rizzo P, Lazzeri E, Abbate M, Remuzzi G, Benigni A. MicroRNA-324-3p promotes renal fibrosis and is a target of ACE inhibition. J Am Soc Nephrol 2012; 23:1496-505. [PMID: 22822076 DOI: 10.1681/asn.2011121144] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
The contribution of microRNA (miRNA) to the pathogenesis of renal fibrosis is not well understood. Here, we investigated whether miRNA modulates the fibrotic process in Munich Wistar Fromter (MWF) rats, which develop spontaneous progressive nephropathy. We analyzed the expression profile of miRNA in microdissected glomeruli and found that miR-324-3p was the most upregulated. In situ hybridization localized miR-324-3p to glomerular podocytes, parietal cells of Bowman's capsule, and most abundantly, cortical tubules. A predicted target of miR-324-3p is prolyl endopeptidase (Prep), a serine peptidase involved in the metabolism of angiotensins and the synthesis of the antifibrotic peptide N-acetyl-seryl-aspartyl-lysyl-proline (Ac-SDKP). In cultured tubular cells, transient transfection with a miR-324-3p mimic reduced Prep protein and activity, validating Prep as a target of this miRNA. In MWF rats, upregulation of miR-324-3p associated with markedly reduced expression of Prep in both glomeruli and tubules, low urine Ac-SDKP, and increased deposition of collagen. ACE inhibition downregulated glomerular and tubular miR-324-3p, promoted renal Prep expression, increased plasma and urine Ac-SDKP, and attenuated renal fibrosis. In summary, these results suggest that dysregulation of the miR-324-3p/Prep pathway contributes to the development of fibrosis in progressive nephropathy. The renoprotective effects of ACE inhibitors may result, in part, from modulation of this pathway, suggesting that it may hold other potential therapeutic targets.
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Affiliation(s)
- Daniela Macconi
- Mario Negri Institute for Pharmacological Research, Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Via Stezzano, 87-24126 Bergamo, Italy.
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Mele C, Iatropoulos P, Donadelli R, Calabria A, Maranta R, Cassis P, Buelli S, Tomasoni S, Piras R, Krendel M, Bettoni S, Morigi M, Delledonne M, Pecoraro C, Abbate I, Capobianchi MR, Hildebrandt F, Otto E, Schaefer F, Macciardi F, Ozaltin F, Emre S, Ibsirlioglu T, Benigni A, Remuzzi G, Noris M. MYO1E mutations and childhood familial focal segmental glomerulosclerosis. N Engl J Med 2011; 365:295-306. [PMID: 21756023 PMCID: PMC3701523 DOI: 10.1056/nejmoa1101273] [Citation(s) in RCA: 201] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND Focal segmental glomerulosclerosis is a kidney disease that is manifested as the nephrotic syndrome. It is often resistant to glucocorticoid therapy and progresses to end-stage renal disease in 50 to 70% of patients. Genetic studies have shown that familial focal segmental glomerulosclerosis is a disease of the podocytes, which are major components of the glomerular filtration barrier. However, the molecular cause in over half the cases of primary focal segmental glomerulosclerosis is unknown, and effective treatments have been elusive. METHODS We performed whole-genome linkage analysis followed by high-throughput sequencing of the positive-linkage area in a family with autosomal recessive focal segmental glomerulosclerosis (index family) and sequenced a newly discovered gene in 52 unrelated patients with focal segmental glomerulosclerosis. Immunohistochemical studies were performed on human kidney-biopsy specimens and cultured podocytes. Expression studies in vitro were performed to characterize the functional consequences of the mutations identified. RESULTS We identified two mutations (A159P and Y695X) in MYO1E, which encodes a nonmuscle class I myosin, myosin 1E (Myo1E). The mutations in MYO1E segregated with focal segmental glomerulosclerosis in two independent pedigrees (the index family and Family 2). Patients were homozygous for the mutations and did not have a response to glucocorticoid therapy. Electron microscopy showed thickening and disorganization of the glomerular basement membrane. Normal expression of Myo1E was documented in control human kidney-biopsy specimens in vivo and in glomerular podocytes in vitro. Transfection studies revealed abnormal subcellular localization and function of the A159P-Myo1E mutant. The Y695X mutation causes loss of calmodulin binding and of the tail domains of Myo1E. CONCLUSIONS MYO1E mutations are associated with childhood-onset, glucocorticoid-resistant focal segmental glomerulosclerosis. Our data provide evidence of a role of Myo1E in podocyte function and the consequent integrity of the glomerular filtration barrier.
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Affiliation(s)
- Caterina Mele
- Mario Negri Institute for Pharmacological Research, Clinical Research Center for Rare Diseases ‘Aldo e Cele Daccò’, Ranica, Bergamo, Italy
| | - Paraskevas Iatropoulos
- Mario Negri Institute for Pharmacological Research, Clinical Research Center for Rare Diseases ‘Aldo e Cele Daccò’, Ranica, Bergamo, Italy
| | - Roberta Donadelli
- Mario Negri Institute for Pharmacological Research, Clinical Research Center for Rare Diseases ‘Aldo e Cele Daccò’, Ranica, Bergamo, Italy
| | - Andrea Calabria
- Department of Medicine, Surgery and Dentistry, Università degli Studi di Milano, Milan, Italy
| | - Ramona Maranta
- Mario Negri Institute for Pharmacological Research, Clinical Research Center for Rare Diseases ‘Aldo e Cele Daccò’, Ranica, Bergamo, Italy
| | - Paola Cassis
- Mario Negri Institute for Pharmacological Research, Clinical Research Center for Rare Diseases ‘Aldo e Cele Daccò’, Ranica, Bergamo, Italy
| | - Simona Buelli
- Mario Negri Institute for Pharmacological Research, Centro Anna Maria Astori Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Susanna Tomasoni
- Mario Negri Institute for Pharmacological Research, Centro Anna Maria Astori Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Rossella Piras
- Mario Negri Institute for Pharmacological Research, Clinical Research Center for Rare Diseases ‘Aldo e Cele Daccò’, Ranica, Bergamo, Italy
| | - Mira Krendel
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, Syracuse, NY, USA
| | - Serena Bettoni
- Mario Negri Institute for Pharmacological Research, Clinical Research Center for Rare Diseases ‘Aldo e Cele Daccò’, Ranica, Bergamo, Italy
| | - Marina Morigi
- Mario Negri Institute for Pharmacological Research, Centro Anna Maria Astori Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Massimo Delledonne
- Center of Functional Genomics, Department of Biotechnologies, University of Verona, Verona Italy
| | - Carmine Pecoraro
- Department of Nephrology and Dialysis ‘Santobono’ Hospital, Napoli, Italy
| | | | | | - Friedhelm Hildebrandt
- Department of Pediatrics, University of Michigan, Ann Arbor MI, USA
- Howard Hughes Medical Institute, University of Michigan, Ann Arbor MI, USA
| | - Edgar Otto
- Department of Pediatrics, University of Michigan, Ann Arbor MI, USA
| | - Franz Schaefer
- Pediatric Nephrology Division, Center for Pediatrics and Adolescent Medicine, Heidelberg, Germany
| | - Fabio Macciardi
- Department of Medicine, Surgery and Dentistry, Università degli Studi di Milano, Milan, Italy
| | - Fatih Ozaltin
- Department of Pediatric Nephrology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Sevinc Emre
- Department of Pediatric Nephrology, Instanbul Medical Faculty, Instanbul University, Instanbul, Turkey
| | - Tulin Ibsirlioglu
- Department of Pediatric Nephrology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Ariela Benigni
- Mario Negri Institute for Pharmacological Research, Centro Anna Maria Astori Science and Technology Park Kilometro Rosso, Bergamo, Italy
| | - Giuseppe Remuzzi
- Mario Negri Institute for Pharmacological Research, Clinical Research Center for Rare Diseases ‘Aldo e Cele Daccò’, Ranica, Bergamo, Italy
- Mario Negri Institute for Pharmacological Research, Centro Anna Maria Astori Science and Technology Park Kilometro Rosso, Bergamo, Italy
- Unit of Nephrology and Dialysis, Ospedali Riuniti di Bergamo, Bergamo Italy
| | - Marina Noris
- Mario Negri Institute for Pharmacological Research, Clinical Research Center for Rare Diseases ‘Aldo e Cele Daccò’, Ranica, Bergamo, Italy
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Noris M, Cassis P, Azzollini N, Cavinato R, Cugini D, Casiraghi F, Aiello S, Solini S, Cassis L, Mister M, Todeschini M, Abbate M, Benigni A, Trionfini P, Tomasoni S, Mele C, Garlanda C, Polentarutti N, Mantovani A, Remuzzi G. The Toll-IL-1R member Tir8/SIGIRR negatively regulates adaptive immunity against kidney grafts. J Immunol 2009; 183:4249-60. [PMID: 19734209 DOI: 10.4049/jimmunol.0803549] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Members of the TLR/IL-1R superfamily mediate ischemia/reperfusion injury and initiate immune response in transplanted organs. In this study, we tested the hypothesis that Toll-IL-1R8 (TIR8), a negative regulator of TLR/IL-1R highly expressed in the kidney, modulates immune cell activation underlying kidney rejection. In a mouse model of fully mismatched kidney allotransplantation in which the graft is spontaneously accepted, intragraft Tir8 expression was enhanced compared with naive kidneys. Targeted deletion of Tir8 in the graft exerted a powerful antitolerogenic action leading to acute rejection. Similarly, in a mouse model of kidney graft acceptance induced by costimulation blockade, most Tir8(-/-) grafts were acutely rejected. Despite similar levels of TLR4, IL-1R, and their ligands, the posttransplant ischemia/reperfusion-induced inflammatory response was more severe in Tir8(-/-) than in Tir8(+/+) grafts and was followed by expansion and maturation of resident dendritic cell precursors. In vitro, Tir8(-/-) dendritic cell precursors acquired higher allostimulatory activity and released more IL-6 upon stimulation with a TLR4 ligand and TNF-alpha than Tir8(+/+) cells, which may explain the increased frequency of antidonor-reactive T cells and the block of regulatory T cell formation in recipients of a Tir8(-/-) kidney. Thus, TIR8 acts locally as a key regulator of allogeneic immune response in the kidney. Tir8 expression and/or signaling in donor tissue are envisaged as a novel target for control of innate immunity and amelioration of graft survival.
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Affiliation(s)
- Marina Noris
- Transplant Research Center Chiara Cucchi De Alessandri & Gilberto Crespi, Mario Negri Institute for Pharmacological Research, via Camozzi 3, 24020 Ranica, Bergamo, Italy.
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Trionfini P, Tomasoni S, Galbusera M, Motto D, Longaretti L, Corna D, Remuzzi G, Benigni A. Adenoviral-mediated gene transfer restores plasma ADAMTS13 antigen and activity in ADAMTS13 knockout mice. Gene Ther 2009; 16:1373-9. [PMID: 19675594 DOI: 10.1038/gt.2009.98] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
ADAMTS13 is a plasma metalloprotease that regulates the size of the von Willebrand factor (VWF) multimers. Genetic or acquired deficiency of ADAMTS13 causes thrombotic thrombocytopenic purpura (TTP) in humans. Plasma infusion is the treatment of choice for patients with congenital ADAMTS13 deficiency. However, this practice exposes patients to the risk of infections, allergies and fluid volume overload. The search for alternative treatments is required. Here, we tested the ability of systemically administered adenovirus encoding human ADAMTS13 to restore the deficient protein in the circulation of Adamts13(-/-) mice. Injection of the adenovirus efficiently transduced the liver, kidney, lung, heart and spleen, resulting in the secretion of ADAMTS13 into plasma. A reduced area of thrombi was observed when blood from Ad-ADAMTS13-treated mice was perfused over a collagen-coated surface in a parallel plate flow chamber compared with blood of Ad-betaGal-treated controls. The secreted ADAMTS13 protein was functionally active even after 2 months from injection. The data provide the proof of principle for developing a novel therapy for the correction of ADAMTS13 deficiency in patients with hereditary TTP.
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Affiliation(s)
- P Trionfini
- Department of Molecular Medicine, Mario Negri Institute for Pharmacological Research, Bergamo, Italy
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Abbate M, Zoja C, Corna D, Rottoli D, Zanchi C, Azzollini N, Tomasoni S, Berlingeri S, Noris M, Morigi M, Remuzzi G. Complement-mediated dysfunction of glomerular filtration barrier accelerates progressive renal injury. J Am Soc Nephrol 2008; 19:1158-67. [PMID: 18354030 DOI: 10.1681/asn.2007060686] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Intrarenal complement activation leads to chronic tubulointerstitial injury in animal models of proteinuric nephropathies, making this process a potential target for therapy. This study investigated whether a C3-mediated pathway promotes renal injury in the protein overload model and whether the abnormal exposure of proximal tubular cells to filtered complement could trigger the resulting inflammatory response. Mice with C3 deficiency were protected to a significant degree against the protein overload-induced interstitial inflammatory response and tissue damage, and they had less severe podocyte injury and less proteinuria. When the same injury was induced in wild-type (WT) mice, antiproteinuric treatment with the angiotensin-converting enzyme inhibitor lisinopril reduced the amount of plasma protein filtered, decreased the accumulation of C3 by proximal tubular cells, and protected against interstitial inflammation and damage. For determination of the injurious role of plasma-derived C3, as opposed to tubular cell-derived C3, C3-deficient kidneys were transplanted into WT mice. Protein overload led to the development of glomerular injury, accumulation of C3 in podocytes and proximal tubules, and tubulointerstitial changes. Conversely, when WT kidneys were transplanted into C3-deficient mice, protein overload led to a more mild disease and abnormal C3 deposition was not observed. These data suggest that the presence of C3 increases the glomerular filtration barrier's susceptibility to injury, ultrafiltered C3 contributes more to tubulointerstitial damage induced by protein overload than locally synthesized C3, and local C3 synthesis is irrelevant to the development of proteinuria. It is speculated that therapies targeting complement combined with interventions to minimize proteinuria would more effectively prevent the progression of renal disease.
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Affiliation(s)
- Mauro Abbate
- Mario Negri Institute for Pharmacological Research, Via Gavazzeni 11, 24125 Bergamo, Italy.
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Tomasoni S, Remuzzi G, Benigni A. Allograft Rejection: Acute and Chronic Studies. Contributions to Nephrology 2008; 159:122-134. [DOI: 10.1159/000125672] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Imberti B, Morigi M, Tomasoni S, Rota C, Corna D, Longaretti L, Rottoli D, Valsecchi F, Benigni A, Wang J, Abbate M, Zoja C, Remuzzi G. Insulin-like growth factor-1 sustains stem cell mediated renal repair. J Am Soc Nephrol 2007; 18:2921-8. [PMID: 17942965 DOI: 10.1681/asn.2006121318] [Citation(s) in RCA: 221] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
In mice with cisplatin-induced acute kidney injury, administration of bone marrow-derived mesenchymal stem cells (MSC) restores renal tubular structure and improves renal function, but the underlying mechanism is unclear. Here, we examined the process of kidney cell repair in co-culture experiments with MSC and cisplatin-injured proximal tubular epithelial cells (PTEC). Exposure of PTEC to cisplatin markedly reduced cell viability at 4 days, but co-culture with MSC provided a protective effect by promoting tubular cell proliferation. This effect was mediated by insulin-like growth factor-1 (IGF-1), highly expressed by MSC as mRNA and protein, since blocking the growth factor's function with a specific antibody attenuated cell proliferation of PTEC. Confirming this, knocking down IGF-1 expression in MSC by small interfering-RNA also resulted in a significant decrease in PTEC proliferation and increased apoptosis. Furthermore, in the murine model of cisplatin-induced kidney injury, administering IGF-1 gene-silenced MSC limited their protective effect on renal function and tubular structure. These findings indicate that MSC exert beneficial effects on tubular cell repair in acute kidney injury by producing the mitogenic and pro-survival factor IGF-1.
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Affiliation(s)
- Barbara Imberti
- Mario Negri Institute for Pharmacological Research, Azienda Ospedaliera, Ospedali Riuniti di Bergamo, Bergamo, Italy
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Aiello S, Cassis P, Cassis L, Tomasoni S, Benigni A, Pezzotta A, Cavinato RA, Cugini D, Azzollini N, Mister M, Longaretti L, Thomson AW, Remuzzi G, Noris M. DnIKK2-transfected dendritic cells induce a novel population of inducible nitric oxide synthase-expressing CD4+CD25- cells with tolerogenic properties. Transplantation 2007; 83:474-84. [PMID: 17318081 DOI: 10.1097/01.tp.0000251808.91901.c3] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND We previously documented that rat bone marrow-derived dendritic cells (DCs), transfected with an adenovirus encoding a dominant negative form of IKK2 (dnIKK2), have impaired allostimulatory capacity and generate CD4 T cells with regulatory function. Here we investigate the potency, the phenotype, and the mechanism of action of dnIKK2-DC-induced regulatory cells and we evaluated their tolerogenic properties in vivo. METHODS Brown Norway (BN) transfected dnIKK2-DCs were cultured with Lewis (LW) lymphocytes in primary mixed lymphocyte reaction (MLR). CD4 T cells were purified from primary MLR and incubated in secondary coculture MLR with LW lymphocytes. Phenotypic characterization was performed by fluorescence-activated cell sorting and real-time polymerase chain reaction. The tolerogenic potential of CD4 T cells pre-exposed to dnIKK2-DCs was evaluated in vivo in a model of kidney allotransplantation. RESULTS CD4 T cells pre-exposed to dnIKK2-DCs were CD4CD25 and expressed interleukin (IL)-10, transforming growth factor-beta, interferon-gamma, IL-2, and inducible nitric oxide synthase (iNOS). These cells (dnIKK2-Treg), cocultured (at up to 1:10 ratio) with a primary MLR, suppressed T-cell proliferation to alloantigens. The regulatory effect was cell-to-cell contact-independent since it was also observed in a transwell system. A nitric oxide synthase inhibitor significantly reverted dnIKK2-Treg-mediated suppression, whereas neutralizing antibodies to IL-10 and TGF-beta had no significant effect. DnIKK2-Treg given in vivo to LW rats prolonged the survival of a kidney allograft from BN rats (the donor rat strain used for generating DCs). CONCLUSIONS DnIKK2-Treg is a unique population of CD4CD25 T cells expressing high levels of iNOS. These cells potently inhibit T-cell response in vitro and induce prolongation of kidney allograft survival in vivo.
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Affiliation(s)
- Sistiana Aiello
- Transplant Research Center, Chiara Cucchi de Alessandri e Gilberto Crespi, Mario Negri Institute for Pharmacological Research, Bergamo, Italy
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Benigni A, Zoja C, Tomasoni S, Campana M, Corna D, Zanchi C, Gagliardini E, Garofano E, Rottoli D, Ito T, Remuzzi G. Transcriptional Regulation of Nephrin Gene by Peroxisome Proliferator–Activated Receptor-γ Agonist: Molecular Mechanism of the Antiproteinuric Effect of Pioglitazone. J Am Soc Nephrol 2006; 17:1624-32. [PMID: 16687628 DOI: 10.1681/asn.2005090983] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
The renoprotective potential of the peroxisome proliferator-activated receptor-gamma (PPAR-gamma) agonist pioglitazone was explored in an immune model of progressive nephropathy, passive Heymann nephritis (PHN), compared with that of an angiotensin II receptor antagonist, taken as standard therapy for renoprotection. PHN rats received orally vehicle, pioglitazone (10 mg/kg twice daily), or candesartan (1 mg/kg twice daily) from months 2 to 8. Pioglitazone reduced proteinuria as effectively as candesartan and limited renal functional and structural changes. Kidneys from untreated PHN rats showed lower nephrin mRNA and protein than controls, both restored by pioglitazone. The effect was seen both early and late during the course of the disease. Whether the antiproteinuric effect of pioglitazone could be due to its effect on nephrin gene transcription also was investigated. HK-2 cells were transfected with plasmids that harbor the luciferase gene under portions (2-kb or 325-bp) of human nephrin gene promoter that contain putative peroxisome proliferator-responsive elements (PPRE) and incubated with pioglitazone (10 muM). Transcriptional activity of luciferase gene was highly increased by pioglitazone, with the strongest expression achieved with the 325-bp fragment. Increase in luciferase activity was prevented by bisphenol A diglycidyl ether, a PPAR-gamma synthetic antagonist. Electrophoretic mobility shift assay experiments showed a direct interaction of PPAR/retinoid X receptor heterodimers to PPRE present in the enhancer region of the nephrin promoter. In conclusion, pioglitazone exerts an antiproteinuric effect in immune-mediated glomerulonephritis as angiotensin II receptor antagonist does. Enhancement of nephrin gene transcription through specific PPRE in its promoter discloses a novel mechanism of renoprotection for PPAR-gamma agonists.
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Affiliation(s)
- Ariela Benigni
- Mario Negri Institute for Pharmacological Research, Azienda Ospedaliera, Ospedali Riuniti di Bergamo, Via Gavazzeni 11, Bergamo 24125, Italy, and Osaka University School of Medicine, Suita, Japan.
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Benigni A, Tomasoni S, Turka LA, Longaretti L, Zentilin L, Mister M, Pezzotta A, Azzollini N, Noris M, Conti S, Abbate M, Giacca M, Remuzzi G. Adeno-associated virus-mediated CTLA4Ig gene transfer protects MHC-mismatched renal allografts from chronic rejection. J Am Soc Nephrol 2006; 17:1665-72. [PMID: 16641148 DOI: 10.1681/asn.2006010090] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Short-term results of renal transplantation have improved considerably in the past 20 yr; however, similar improvements in long-term outcome have not been achieved. The primary cause of late graft loss is chronic rejection that might be treated by gene therapeutic approaches. Ideally, one would like to impair locally the contact between transplant antigen and the host immune system without compromising the generalized immune competence of the recipient. This can be achieved by local expression of the therapeutic protein in the site of interest using gene therapy. Here it is shown that chronic allograft rejection can be prevented effectively by local delivery of recombinant adeno-associated virus (AAV) vectors that encode the CTLA4Ig immunosuppressant protein to the donor kidney in a fully MHC-mismatched rat strain combination. AAV CTLA4Ig prevented progressive proteinuria and protected transplant kidneys from renal structural injury. A population of anergic T cells with regulatory activity, which eventually were responsible for the induction of tolerance, were found in recipient lymph nodes and in the graft as long as 120 d after transplantation. These data indicate that AAV-mediated CTLA4Ig gene transfer to donor graft represents a promising tool to prevent the onset of chronic rejection and circumvent the unwanted systemic adverse effects of the administration of immunomodulatory protein.
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Affiliation(s)
- Ariela Benigni
- Mario Negri Institute for Pharmacological Research, 11-24125 Bergamo, Italy
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Tomasoni S, Aiello S, Cassis L, Noris M, Longaretti L, Cavinato RA, Azzollini N, Pezzotta A, Remuzzi G, Benigni A. Dendritic Cells Genetically Engineered with Adenoviral Vector Encoding dnIKK2 Induce the Formation of Potent CD4+ T-Regulatory Cells. Transplantation 2005; 79:1056-61. [PMID: 15880043 DOI: 10.1097/01.tp.0000161252.17163.31] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Immature dendritic cells (DC), characterized by low expression of both major histocompatibility complex class II antigens and co-stimulatory molecules, can be instrumental in the induction of peripheral tolerance. Because nuclear factor (NF)-kappa B is central to DC maturation, the authors engineered DC with an adenoviral vector (Adv) encoding for a kinase-defective dominant negative form of IKK2 (dnIKK2) to block NF-kappa B activation and inhibit DC maturation. METHODS DC were obtained by culturing bone marrow from Brown Norway (BN) rats with granulocyte-macrophage colony-stimulating factor and interleukin-4 for 11 days. To block NF-kappa B activation, at day 9, cells were transfected with AdV-dnIKK2. At day 11, cells were used as stimulators in primary mixed leukocyte reaction (MLR) with naive Lewis rat lymphocytes as responders. CD4+ T cells were purified from primary MLR and tested in secondary MLR with allogeneic mature DC and in co-culture MLR with naive lymphocytes. The tolerogenic potential of dnIKK2-DC was evaluated in vivo in a model of rat kidney allotransplantation. RESULTS DnIKK2-DC were immature and lacked any allostimulatory activity. T cells preexposed to allogeneic dnIKK2-DC were hyporesponsive to a secondary stimulation with mature DC and acquired potent regulatory properties, inhibiting naive T-cell proliferation toward allogeneic stimuli. Pretransplant infusion of allogeneic donor dnIKK2-DC prolonged the survival of a kidney allograft from the same allogeneic donor, without the need for immunosuppressive therapy. CONCLUSIONS Allogeneic DC, rendered immature by dnIKK2 transfection, induce in vitro differentiation of naive T cells into CD4+ T-regulatory cells, effective at low ratios with target cells, rendering them applicable for cellular therapy of immune-mediated abnormalities and for preventing transplant rejection.
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Affiliation(s)
- Susanna Tomasoni
- Transplant Research Center Chiara Cucchi de Alessandri e Gilberto Crespi, Mario Negri Institute for Pharmacological Research, Bergamo, Italy
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Benigni A, Gagliardini E, Tomasoni S, Abbate M, Ruggenenti P, Kalluri R, Remuzzi G. Selective impairment of gene expression and assembly of nephrin in human diabetic nephropathy. Kidney Int 2004; 65:2193-200. [PMID: 15149332 DOI: 10.1111/j.1523-1755.2004.00636.x] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Recent disclosure of podocyte proteins has unraveled previously rather mysterious mechanisms that govern glomerular perm-selectivity in health and disease. Here we addressed the role of nephrin, CD2-associated protein (CD2AP), and podocin together with the integrity of the slit diaphragm in the pathogenesis of proteinuria of patients with diabetes and nephropathy. METHODS Nephrin mRNA and protein expression were evaluated in parallel in adult diabetic patients by in situ hybridization and immunohistochemistry. For comparison, nondiabetic patients with minimal change nephrosis and normal control patients were evaluated. CD2AP and podocin expression by immunohistochemistry was also assessed. The filtration slit was analyzed by morphometry and transmission electron microscopy. RESULTS Extracellular nephrin mRNA and protein were markedly reduced in diabetic patients. No changes were found in patients with minimal change versus controls. CD2AP and podocin were comparable in all subjects. Ultrastructural analysis showed in diabetic patients a remarkable reduction in the percentage of electron dense slit diaphragms, despite a frequency of the filtration slits comparable to control patients. CONCLUSION Down-regulation of nephrin and loss of the electron dense structure of slit diaphragm indicate a novel mechanism accounting for proteinuria in diabetic nephropathy. To the extent that glomerular protein trafficking contributes to renal disease progression, our findings may have clinical relevance. Reduction of nephrin in the context of normal expression of CD2AP and podocin can be taken reasonably as a specific marker of renal disease in diabetes. Therapies targeted at correcting podocyte nephrin might be of value for diabetic medicine.
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Affiliation(s)
- Ariela Benigni
- Mario Negri Institute for Pharmacological Research, Negri Bergamo Laboratories, Bergamo, Italy
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Tomasoni S, Benigni A. The goal of intragraft gene therapy. Contrib Nephrol 2004; 146:143-150. [PMID: 15567928 DOI: 10.1159/000082074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
Despite the impressive results of one-year survival rates, organ transplantation still faces major problems. Current anti-rejection drugs reduce systemic immunity nonselectively and increase the risk of infection and cancer on the long term. Theoretically, selective inhibition of alloimmune response can be achieved at the organ level by intragraft transfer of genes with immunomodulatory properties. In the last decade, gene therapy emerged as a new strategy in renal, heart and liver transplantation, showing promising results in experimental animals, almost in controlling acute rejection. The success of gene therapy in the transplant medicine is strongly dependent on the efficiency of the delivery system that allows local transfer and expression of the therapeutic gene in the target organ or tissue. The main findings concerning the suitability of gene therapy in preventing graft rejection will be discussed here.
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Affiliation(s)
- Susanna Tomasoni
- Mario Negri Institute for Pharmacological Research, Bergamo, Italy
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Morigi M, Imberti B, Zoja C, Corna D, Tomasoni S, Abbate M, Rottoli D, Angioletti S, Benigni A, Perico N, Alison M, Remuzzi G. Mesenchymal stem cells are renotropic, helping to repair the kidney and improve function in acute renal failure. J Am Soc Nephrol 2004; 15:1794-804. [PMID: 15213267 DOI: 10.1097/01.asn.0000128974.07460.34] [Citation(s) in RCA: 519] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Injury to a target organ can be sensed by bone marrow stem cells that migrate to the site of damage, undergo differentiation, and promote structural and functional repair. This remarkable stem cell capacity prompted an investigation of the potential of mesenchymal and hematopoietic stem cells to cure acute renal failure. The model of renal injury induced in mice by the anticancer agent cisplatin was chosen. Injection of mesenchymal stem cells of male bone marrow origin remarkably protected cisplatin-treated syngeneic female mice from renal function impairment and severe tubular injury. Y chromosome-containing cells localized in the context of the tubular epithelial lining and displayed binding sites for Lens culinaris lectin, indicating that mesenchymal stem cells engraft the damaged kidney and differentiate into tubular epithelial cells, thereby restoring renal structure and function. Mesenchymal stem cells markedly accelerated tubular proliferation in response to cisplatin-induced damage, as revealed by higher numbers of Ki-67-positive cells within the tubuli with respect to cisplatin-treated mice that were given saline. Hematopoietic stem cells failed to exert beneficial effects. These results offer a strong case for exploring the possibility that mesenchymal stem cells by virtue of their renotropic property and tubular regenerative potential may have a role in the treatment of acute renal failure in humans.
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Affiliation(s)
- Marina Morigi
- Mario Negri Institute for Pharmacological Research, Bergamo, Italy.
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Abstract
The success of gene therapy strongly depends on an efficient delivery system to allow local transfer and expression of the therapeutic gene in the target organ or tissue. Vector systems have been improved and many show promise. There are two different categories of delivery vehicles: non-viral and viral vectors, both with advantages and disadvantages that must be taken into consideration in view of the final aim. Compared to other solid organs, the kidney offers the main advantage of access by different routes that dictate different sites of transfection. Thus, the choice of the delivery vehicle and administration route has to take account which cells are to be specifically targeted by the gene transfer approach. This concept will be discussed in the first part of the review. Using a gene therapy approach, improvements of renal function and interstitial inflammation have been achieved in experimental models of glomerulonephritis and tubulo-interstitial damage. Gene therapy applied to renal transplantation has shown promising results in rodents, almost controlling acute rejection. Finally, the development of animal models resembling the clinical features of human genetic renal disorders offers a first step towards new treatments among which gene therapy could become reality in the near future. The main findings concerning the suitability of gene therapy for slowing the progression of kidney diseases, and preventing acute renal graft rejection, or treating genetic disorders, are discussed.
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Affiliation(s)
- S Tomasoni
- Mario Negri Institute for Pharmacological Research, Via Gavazzeni 11, 24125 Bergamo, Italy.
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Donadelli R, Zanchi C, Morigi M, Buelli S, Batani C, Tomasoni S, Corna D, Rottoli D, Benigni A, Abbate M, Remuzzi G, Zoja C. Protein overload induces fractalkine upregulation in proximal tubular cells through nuclear factor kappaB- and p38 mitogen-activated protein kinase-dependent pathways. J Am Soc Nephrol 2004; 14:2436-46. [PMID: 14514721 DOI: 10.1097/01.asn.0000089564.55411.7f] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Investigated was the effect of high albumin concentrations on proximal tubular cell expression of fractalkine. Human proximal tubular cells (HK-2) were incubated with human serum albumin (HSA), which induced a dose-dependent increase in fractalkine mRNA associated with increased levels of both membrane-bound and soluble forms of the protein. To evaluate the role of nuclear factor kappaB (NF-kappaB) activation in HSA-induced fractalkine mRNA, HK-2 cells were infected with a recombinant adenovirus encoding the natural inhibitor of NF-kappaB, IkBalpha; a 43% reduction of fractalkine mRNA levels resulted. Similarly, when cells were infected with the recombinant adenovirus expressing dominant negative mutant of the IkB kinase 2, a 55% inhibition of fractalkine mRNA was achieved. p38 mitogen-activated protein kinase was activated by HSA and was involved in NF-kappaB-dependent transcription of fractalkine. In kidneys of mice with bovine serum albumin overload proteinuria, fractalkine mRNA levels were 2.3-fold greater than those of controls. Fractalkine expression was also induced in tubular epithelial cells in this model. Anti-CXCR1 antibody treatment limited interstitial accumulation of mononuclear cells. Protein overload is a promoter of fractalkine gene induction mediated by NF-kappaB and p38 activation in proximal tubular cells. Fractalkine might contribute to direct mononuclear cells into peritubular interstitium and enhance their adhesion property, which in turn would favor inflammation and disease progression.
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Affiliation(s)
- Roberta Donadelli
- Mario Negri Institute for Pharmacological Research and Unit of Nephrology and Dialysis, Azienda Ospedaliera, Ospedali Riuniti di Bergamo, Bergamo, Italy
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Tomasoni S, Longaretti L, Azzollini N, Gagliardini E, Mister M, Buehler T, Remuzzi G, Benigni A. Favorable effect of cotransfection with TGF-beta and CTLA4Ig of the donor kidney on allograft survival. Am J Nephrol 2004; 24:275-83. [PMID: 15057025 DOI: 10.1159/000077611] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2003] [Accepted: 02/12/2004] [Indexed: 12/20/2022]
Abstract
BACKGROUND/AIMS Gene transfer of viral interleukin 10 (vIL-10) or transforming growth factor beta (TGF-beta) successfully prolonged liver and heart graft survival. Here we assessed whether injection of adenovirus (Ad) coding vIL-10 (AdvIL-10) or TGF-beta3 (AdTGF-beta3) prolonged kidney allograft survival. Since we previously demonstrated that transfection of the donor kidney with CTLA4Ig significantly prolonged allograft survival, we also evaluated the effect of a combined injection of AdvIL-10 or AdTGF-beta3 with the AdCTLA4Ig. METHODS Adenoviral vectors or saline were ex vivo injected into the renal artery of Brown Norway (RT.1n) donor kidneys subsequently grafted into Lewis (RT.1(l)) rats. Graft survival, transgene expression, graft cell infiltration, and histological changes were assessed. RESULTS Allografts of saline or Ad-beta-galactosidase controls were promptly rejected (mean survival time +/- SE 7.6 +/- 0.2 and 7.8 +/- 0.3 days, respectively). AdvIL-10 significantly prolonged survival only in 2 out of 9 animals (23.2 +/- 9.9 days), with vIL-10 expression detected on day 4. Survival was prolonged in 1 out of 5 animals by AdTGF-beta3 (14.4 +/- 5.3 days) despite the fact that the transgene was still observed after 14 days. While the combined injection of AdvIL-10 with AdCTLA4Ig did not protect the kidney from rejection (17.4 +/- 4.6 days), AdTGF-beta3 added to AdCTLA4Ig consistently prolonged the allograft lifespan in all animals (70.6 +/- 39.6 days), inducing indefinite survival in 1 animal which showed long-term gene expression and T cells hyporesponsive to alloantigens. CONCLUSION Overexpression of AdTGF-beta3 concomitant with the blockade of the CD28/B7 pathway by AdCTLA4Ig induces strong immunosuppression that occasionally allows the acceptance of a fully major histocompatibility complex mismatched renal graft.
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Affiliation(s)
- Susanna Tomasoni
- Mario Negri Institute for Pharmacological Research, Institute for Pharmacological Research, Bergamo, Italy
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47
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Polentarutti N, Rol GP, Muzio M, Bosisio D, Camnasio M, Riva F, Zoja C, Benigni A, Tomasoni S, Vecchi A, Garlanda C, Mantovani A. Unique pattern of expression and inhibition of IL-1 signaling by the IL-1 receptor family member TIR8/SIGIRR. Eur Cytokine Netw 2003; 14:211-8. [PMID: 14715412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2023]
Abstract
TIR8, also known as single Ig IL-1R-related molecule (SIGIRR), is a member of the IL-1 receptor family. The present study was designed to investigate the expression and function of TIR8. TIR8 was mainly expressed in mouse and human epithelial tissues such as kidney, lung and gut. Resting and activated T and B lymphocytes and monocytes-macrophages expressed little or no TIR8, with the exception of the mouse GG2EE macrophage line. In the kidney, the organ with highest mRNA levels, TIR8 expression was confined to epithelial cells and, in situ, to tubular epithelium. A variety of signals failed to regulate TIR8 expression, but LPS reduced TIR8 mRNA transcripts. An NF-kB driven reporter system was used to investigate the function of TIR8. TIR8 did not activate NF-kB expression alone or in concert with IL-1R1. In contrast, TIR8 inhibited signaling from the IL-1R complex. Inhibition required the intracellular portion of TIR8 but the extracellular domain was dispensable for blocking activity. Thus, TIR8 is a unique member of the IL-1R family, with a distinct pattern of epithelial expression, including the kidney and mucosae, and an inhibitory function on IL-1 signaling.
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Affiliation(s)
- Nadia Polentarutti
- Dept. Immunology and Cell Biology, Mario Negri Institute for Pharmacological Research, Milan, 20157, Italy
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Gagliardini E, Benigni A, Tomasoni S, Abbate M, Kalluri R, Remuzzi G. Targeted downregulation of extracellular nephrin in human IgA nephropathy. Am J Nephrol 2003; 23:277-86. [PMID: 12853730 DOI: 10.1159/000072281] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2003] [Accepted: 06/09/2003] [Indexed: 11/19/2022]
Abstract
BACKGROUND The identification of nephrin and CD2AP, podocyte proteins which modulate the properties of glomerular barrier selectivity, has made it possible to unravel the mechanisms undergoing foot process effacement and proteinuria. Here we explored the role of nephrin and CD2AP together with the integrity of the slit diaphragm in the pathogenesis of proteinuria in patients with acquired glomerular diseases. METHODS Nephrin mRNA and protein expression were systematically evaluated in 28 renal biopsy samples from adult patients with primary glomerular disease and proteinuria by in situ hybridization and immunohistochemistry using antibodies directed against extra- and intracellular nephrin and compared with biopsy samples from normal controls. CD2AP protein expression by immunohistochemistry was also assessed. Morphometrical analysis of the filtration slit was performed by transmission electron microscopy. RESULTS Nephrin mRNA and expression of the extracellular nephrin were markedly reduced in IgA nephropathy. No changes were found in patients with minimal change nephrosis and focal segmental glomerulosclerosis. The staining of intracellular nephrin and CD2AP did not change among patients. A comparable frequency of the filtration slits was observed in all patient groups, except in minimal change disease patients, due to extensive foot process effacement. The percentage of slit diaphragms with a filamentous image was markedly reduced in IgA nephropathy, but was comparable to controls in minimal change disease. Slit pore width showed a tendency to decrease both in patients with minimal change disease and IgA nephropathy. CONCLUSIONS These results indicate that the ultrastructure of the filtration slit diaphragm is altered in patients with IgA nephropathy as a consequence of targeted downregulation of extracellular nephrin. Further studies are needed to evaluate the pathophysiological meaning of nephrin abnormality in IgA nephropathy and how these changes can be modulated by antiproteinuric therapy.
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Affiliation(s)
- Elena Gagliardini
- Mario Negri Institute for Pharmacological Research, Negri Bergamo Laboratories, Bergamo, Italy.
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Abbate M, Zoja C, Morigi M, Rottoli D, Angioletti S, Tomasoni S, Zanchi C, Longaretti L, Donadelli R, Remuzzi G. Transforming growth factor-beta1 is up-regulated by podocytes in response to excess intraglomerular passage of proteins: a central pathway in progressive glomerulosclerosis. Am J Pathol 2002; 161:2179-93. [PMID: 12466133 PMCID: PMC1850904 DOI: 10.1016/s0002-9440(10)64495-1] [Citation(s) in RCA: 111] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Chronic diseases of the kidney have a progressive course toward organ failure. Common pathway mechanisms of progressive injury, irrespectively of the etiology of the underlying diseases, include glomerular capillary hypertension and enhanced passage of plasma proteins across the glomerular capillary barrier because of impaired permselective function. These changes are associated with podocyte injury and glomerular sclerosis. Direct evidence for causal roles is lacking, particularly for the link between intraglomerular protein deposition and sclerosing reaction. Because transforming growth factor-beta1 (TGF-beta1) is the putative central mediator of scarring, we hypothesized that TGF-beta1 can be up-regulated by protein overload of podocytes thereby contributing to sclerosis. In rats with renal mass reduction, protein accumulation in podocytes as a consequence of enhanced transcapillary passage preceded podocyte dedifferentiation and injury, increase in TGF-beta1 expression in podocytes, and TGF-beta1-dependent activation of mesangial cells. Angiotensin-converting enzyme inhibitor prevented both accumulation of plasma proteins and TGF-beta1 overexpression in podocytes and sclerosis. Albumin load on podocytes in vitro caused loss of the synaptopodin differentiation marker and enhanced TGF-beta1 mRNA and protein. Conditioned medium of albumin-stimulated podocytes induced a sclerosing phenotype in mesangial cells, an effect mimicked by TGF-beta1 and blocked by anti-TGF-beta1 antibodies. Thus, the passage of excess plasma proteins across the glomerular capillary wall is the trigger of podocyte dysfunction and of a TGF-beta1-mediated mechanism underlying sclerosis. Agents to reduce TGF-beta1, possibly combined with angiotensin blockade, should have priority in novel approaches to treatment of progressive nephropathies.
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Affiliation(s)
- Mauro Abbate
- Mario Negri Institute for Pharmacological Research, Via Gavazzeni 11, 24125 Bergamo, Italy.
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Zoja C, Angioletti S, Donadelli R, Zanchi C, Tomasoni S, Binda E, Imberti B, te Loo M, Monnens L, Remuzzi G, Morigi M. Shiga toxin-2 triggers endothelial leukocyte adhesion and transmigration via NF-kappaB dependent up-regulation of IL-8 and MCP-1. Kidney Int 2002; 62:846-56. [PMID: 12164866 DOI: 10.1046/j.1523-1755.2002.00503.x] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND Shiga toxin (Stx)-producing E. coli is a causative agent of the epidemic form of hemolytic uremic syndrome (HUS), the most common cause of acute renal failure in children. Endothelial injury and leukocyte activation are instrumental to the development of microangiopathic lesions. To obtain more insight into the mechanisms favoring endothelium-leukocyte interaction, we studied (1) the effect of Stx-2 on leukocyte adhesion and transmigration in human endothelial cells under flow; (2) the effect of Stx-2 on endothelial expression of monocyte chemoattractant protein-1 (MCP-1) and interleukin-8 (IL-8) and their functional role in the adhesive phenomena; and (3) the role of nuclear factor-kappaB (NF-kappaB) in endothelial chemokine expression. METHODS For adhesion experiments, human umbilical vein endothelial cells (HUVEC) and human glomerular endothelial cells (GEC) were incubated for 24 hours with Stx-2 (25 pmol/L), with or without anti-IL-8 or MCP-1 antibodies, and then exposed to leukocyte suspension under flow (1.5 dynes/cm2). IL-8 and MCP-1 expression was evaluated in Stx-2 treated endothelial cells (6 hours) by Northern blot. NF-kappaB activity was assessed by electrophoretic mobility shift assay. The role of NF-kappaB in Stx-induced chemokines was evaluated by transfecting HUVEC with an adenovirus coding for IkappaBalpha. RESULTS Stx-2 significantly enhanced the number of leukocytes that adhered and then migrated across the endothelium. Stx-2 increased the expression of IL-8 and MCP-1, which was preceded by NF-kappaB activation. Blocking of endothelial IL-8 and MCP-1 with corresponding antibodies significantly inhibited Stx-induced leukocyte adhesion and migration either in HUVEC or GEC. Adenovirus-mediated gene transfer of IkappaBalpha down-regulated IL-8 and MCP-1 mRNA and also inhibited the adhesion and transmigration of leukocytes in Stx-treated HUVEC. CONCLUSIONS Stx-2 via a transcriptional activation mechanism specifically mediated by NF-kappaB up-regulates endothelial MCP-1 and IL-8. Both chemokines are important modulators of leukocyte adhesion and transmigration under flow. These findings might be relevant to understand the nature of microvascular lesions in HUS and open future perspectives for better treatment of microvascular thrombosis.
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Affiliation(s)
- Carla Zoja
- Mario Negri Institute for Pharmacological Research, Azienda Ospedaliera, Ospedali Riuniti di Bergamo, Via Gavazzeni 11, 24125 Bergamo, Italy.
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