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Prymaczok NC, De Francesco PN, Mazzetti S, Humbert-Claude M, Tenenbaum L, Cappelletti G, Masliah E, Perello M, Riek R, Gerez JA. Cell-to-cell transmitted alpha-synuclein recapitulates experimental Parkinson's disease. NPJ Parkinsons Dis 2024; 10:10. [PMID: 38184623 PMCID: PMC10771530 DOI: 10.1038/s41531-023-00618-6] [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: 06/28/2022] [Accepted: 12/08/2023] [Indexed: 01/08/2024] Open
Abstract
Parkinson's disease is characterized by a progressive accumulation of alpha-Synuclein (αSyn) neuronal inclusions called Lewy bodies in the nervous system. Lewy bodies can arise from the cell-to-cell propagation of αSyn, which can occur via sequential steps of secretion and uptake. Here, by fusing a removable short signal peptide to the N-terminus of αSyn, we developed a novel mouse model with enhanced αSyn secretion and cell-to-cell transmission. Expression of the secreted αSyn in the mouse brain was under the control of a novel hybrid promoter in combination with adeno-associated virus serotype 9 (AAV9). This combination of promoter and viral vector induced a robust expression in neurons but not in the glia of injected mice. Biochemical characterization of the secreted αSyn revealed that, in cultured cells, this protein is released to the extracellular milieu via conventional secretion. The released αSyn is then internalized and processed by acceptor cells via the endosome-lysosome pathway indicating that the secreted αSyn is cell-to-cell transmitted. The secreted αSyn is aggregation-prone and amyloidogenic, and when expressed in the brain of wild-type non-transgenic mice, it induces a Parkinson's disease-like phenotype that includes a robust αSyn pathology in the substantia nigra, neuronal loss, neuroinflammation, and motor deficits, all the key features of experimental animal models of Parkinson's disease. In summary, a novel animal model of Parkinson's disease based on enhanced cell-to-cell transmission of αSyn was developed. The neuron-produced cell-to-cell transmitted αSyn triggers all phenotypic features of experimental Parkinson's disease in mice.
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Affiliation(s)
- Natalia Cecilia Prymaczok
- Institute of Molecular Physical Science, Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, Switzerland
| | - Pablo Nicolas De Francesco
- Laboratory of Neurophysiology of the Multidisciplinary Institute of Cell Biology (IMBICE), dependent of the Argentine Research Council (CONICET), Scientific Research Commission and University of La Plata Buenos Aires, La Plata, Argentina
| | - Samanta Mazzetti
- Department of Biosciences, Università degli Studi di Milano, Milano, Italy
- Fondazione Grigioni per il Morbo di Parkinson, Milano, Italy
| | - Marie Humbert-Claude
- Laboratory of Neurotherapies and NeuroModulation, Clinical Neuroscience Department, Center for Neuroscience Research, Lausanne University Hospital, Lausanne, Switzerland
| | - Liliane Tenenbaum
- Laboratory of Neurotherapies and NeuroModulation, Clinical Neuroscience Department, Center for Neuroscience Research, Lausanne University Hospital, Lausanne, Switzerland
| | - Graziella Cappelletti
- Department of Biosciences, Università degli Studi di Milano, Milano, Italy
- Fondazione Grigioni per il Morbo di Parkinson, Milano, Italy
| | - Eliezer Masliah
- Division of Neurosciences, National Institute on Aging/NIH, 7201, Wisconsin Ave, Bethesda, MD, USA
| | - Mario Perello
- Laboratory of Neurophysiology of the Multidisciplinary Institute of Cell Biology (IMBICE), dependent of the Argentine Research Council (CONICET), Scientific Research Commission and University of La Plata Buenos Aires, La Plata, Argentina
| | - Roland Riek
- Institute of Molecular Physical Science, Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, Switzerland
| | - Juan Atilio Gerez
- Institute of Molecular Physical Science, Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, Switzerland.
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2
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Mazzetti S, Giampietro F, Calogero AM, Isilgan HB, Gagliardi G, Rolando C, Cantele F, Ascagni M, Bramerio M, Giaccone G, Isaias IU, Pezzoli G, Cappelletti G. Linking acetylated α-Tubulin redistribution to α-Synuclein pathology in brain of Parkinson's disease patients. NPJ Parkinsons Dis 2024; 10:2. [PMID: 38167511 PMCID: PMC10761989 DOI: 10.1038/s41531-023-00607-9] [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: 02/07/2023] [Accepted: 11/24/2023] [Indexed: 01/05/2024] Open
Abstract
Highly specialized microtubules in neurons are crucial to both health and disease of the nervous system, and their properties are strictly regulated by different post-translational modifications, including α-Tubulin acetylation. An imbalance in the levels of acetylated α-Tubulin has been reported in experimental models of Parkinson's disease (PD) whereas pharmacological or genetic modulation that leads to increased acetylated α-Tubulin successfully rescues axonal transport defects and inhibits α-Synuclein aggregation. However, the role of acetylation of α-Tubulin in the human nervous system is largely unknown as most studies are based on in vitro evidence. To capture the complexity of the pathological processes in vivo, we analysed post-mortem human brain of PD patients and control subjects. In the brain of PD patients at Braak stage 6, we found a redistribution of acetylated α-Tubulin, which accumulates in the neuronal cell bodies in subcortical structures but not in the cerebral cortex, and decreases in the axonal compartment, both in putamen bundles of fibres and in sudomotor fibres. High-resolution and 3D reconstruction analysis linked acetylated α-Tubulin redistribution to α-Synuclein oligomerization and to phosphorylated Ser 129 α-Synuclein, leading us to propose a model for Lewy body (LB) formation. Finally, in post-mortem human brain, we observed threadlike structures, resembling tunnelling nanotubes that contain α-Synuclein oligomers and are associated with acetylated α-Tubulin enriched neurons. In conclusion, we support the role of acetylated α-Tubulin in PD pathogenesis and LB formation.
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Affiliation(s)
- Samanta Mazzetti
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy.
- Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy.
| | | | - Alessandra Maria Calogero
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy
- Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy
| | | | - Gloria Gagliardi
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy
| | - Chiara Rolando
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy
| | - Francesca Cantele
- Department of Chemistry, Università degli Studi di Milano, Milan, Italy
| | - Miriam Ascagni
- Unitech NOLIMITS, Università degli Studi di Milano, Milan, Italy
| | - Manuela Bramerio
- S. C. Divisione Oncologia Falck and S. C. Divisione Anatomia Patologica, Ospedale Niguarda Ca' Granda, Milan, Italy
| | - Giorgio Giaccone
- Unit of Neuropathology and Neurology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Ioannis Ugo Isaias
- Parkinson Institute, ASST G. Pini-CTO, Milan, Milan, Italy
- Department of Neurology, University Hospital of Würzburg and the Julius Maximilian University of Würzburg, 97080, Würzburg, Germany
| | - Gianni Pezzoli
- Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy
| | - Graziella Cappelletti
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy.
- Center of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, Milan, Italy.
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3
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Calogero AM, Basellini MJ, Isilgan HB, Longhena F, Bellucci A, Mazzetti S, Rolando C, Pezzoli G, Cappelletti G. Acetylated α-Tubulin and α-Synuclein: Physiological Interplay and Contribution to α-Synuclein Oligomerization. Int J Mol Sci 2023; 24:12287. [PMID: 37569662 PMCID: PMC10418364 DOI: 10.3390/ijms241512287] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/26/2023] [Accepted: 07/28/2023] [Indexed: 08/13/2023] Open
Abstract
Emerging evidence supports that altered α-tubulin acetylation occurs in Parkinson's disease (PD), a neurodegenerative disorder characterized by the deposition of α-synuclein fibrillary aggregates within Lewy bodies and nigrostriatal neuron degeneration. Nevertheless, studies addressing the interplay between α-tubulin acetylation and α-synuclein are lacking. Here, we investigated the relationship between α-synuclein and microtubules in primary midbrain murine neurons and the substantia nigra of post-mortem human brains. Taking advantage of immunofluorescence and Proximity Ligation Assay (PLA), a method allowing us to visualize protein-protein interactions in situ, combined with confocal and super-resolution microscopy, we found that α-synuclein and acetylated α-tubulin colocalized and were in close proximity. Next, we employed an α-synuclein overexpressing cellular model and tested the role of α-tubulin acetylation in α-synuclein oligomer formation. We used the α-tubulin deacetylase HDAC6 inhibitor Tubacin to modulate α-tubulin acetylation, and we evaluated the presence of α-synuclein oligomers by PLA. We found that the increase in acetylated α-tubulin significantly induced α-synuclein oligomerization. In conclusion, we unraveled the link between acetylated α-tubulin and α-synuclein and demonstrated that α-tubulin acetylation could trigger the early step of α-synuclein aggregation. These data suggest that the proper regulation of α-tubulin acetylation might be considered a therapeutic strategy to take on PD.
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Affiliation(s)
- Alessandra Maria Calogero
- Department of Biosciences, Università degli Studi di Milano, 20133 Milan, Italy; (M.J.B.); (H.B.I.); (S.M.); (C.R.)
- Fondazione Grigioni per il Morbo di Parkinson, 20125 Milan, Italy;
| | - Milo Jarno Basellini
- Department of Biosciences, Università degli Studi di Milano, 20133 Milan, Italy; (M.J.B.); (H.B.I.); (S.M.); (C.R.)
| | - Huseyin Berkcan Isilgan
- Department of Biosciences, Università degli Studi di Milano, 20133 Milan, Italy; (M.J.B.); (H.B.I.); (S.M.); (C.R.)
| | - Francesca Longhena
- Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy; (F.L.); (A.B.)
| | - Arianna Bellucci
- Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy; (F.L.); (A.B.)
| | - Samanta Mazzetti
- Department of Biosciences, Università degli Studi di Milano, 20133 Milan, Italy; (M.J.B.); (H.B.I.); (S.M.); (C.R.)
- Fondazione Grigioni per il Morbo di Parkinson, 20125 Milan, Italy;
| | - Chiara Rolando
- Department of Biosciences, Università degli Studi di Milano, 20133 Milan, Italy; (M.J.B.); (H.B.I.); (S.M.); (C.R.)
| | - Gianni Pezzoli
- Fondazione Grigioni per il Morbo di Parkinson, 20125 Milan, Italy;
- Parkinson Institute, ASST-Pini-CTO, 20126 Milan, Italy
| | - Graziella Cappelletti
- Department of Biosciences, Università degli Studi di Milano, 20133 Milan, Italy; (M.J.B.); (H.B.I.); (S.M.); (C.R.)
- Center of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, 20133 Milan, Italy
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4
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Basellini MJ, Kothuis JM, Comincini A, Pezzoli G, Cappelletti G, Mazzetti S. Pathological Pathways and Alpha-Synuclein in Parkinson's Disease: A View from the Periphery. FRONT BIOSCI-LANDMRK 2023; 28:33. [PMID: 36866559 DOI: 10.31083/j.fbl2802033] [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: 12/20/2022] [Revised: 02/03/2023] [Accepted: 02/15/2023] [Indexed: 02/28/2023]
Abstract
Alpha-synuclein inclusions are the distinctive trait of brain areas affected by neurodegeneration in Parkinson's disease (PD). Nevertheless, PD is now considered as a multisystemic disorder, since alpha-synuclein pathology has been described also outside the central nervous system. In this regard, the early, non-motor autonomic symptoms point out an important role for the peripheral nervous system during disease progression. On this basis, we propose a review of the alpha-synuclein-related pathological processes observed at peripheral level in PD, starting from molecular mechanisms, through cellular processes to systemic modifications. We discuss their relevance in the etiopathogenesis of the disease, suggesting they are concurrent players in the development of PD, and that the periphery is an easily-accessible window to look at what is occurring in the central nervous system.
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Affiliation(s)
- Milo Jarno Basellini
- Department of Biosciences, Università degli Studi di Milano, 20133 Milan, Italy.,Department of Biochemistry and Molecular Biology, Faculty of Biology, Universitat de Barcelona, 08028 Barcelona, Spain
| | | | | | - Gianni Pezzoli
- Fondazione Grigioni per il Morbo di Parkinson, 20125 Milan, Italy
| | - Graziella Cappelletti
- Department of Biosciences, Università degli Studi di Milano, 20133 Milan, Italy.,Center of Excellence of Neurodegenerative Diseases, Università degli Studi di Milano, 20133 Milan, Italy
| | - Samanta Mazzetti
- Department of Biosciences, Università degli Studi di Milano, 20133 Milan, Italy.,Fondazione Grigioni per il Morbo di Parkinson, 20125 Milan, Italy
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5
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Mazzetti S, Calogero AM, Pezzoli G, Cappelletti G. Cross-talk between α-synuclein and the microtubule cytoskeleton in neurodegeneration. Exp Neurol 2023; 359:114251. [PMID: 36243059 DOI: 10.1016/j.expneurol.2022.114251] [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: 05/17/2022] [Revised: 10/03/2022] [Accepted: 10/06/2022] [Indexed: 12/30/2022]
Abstract
Looking at the puzzle that depicts the molecular determinants in neurodegeneration, many pieces are lacking and multiple interconnections among key proteins and intracellular pathways still remain unclear. Here we focus on the concerted action of α-synuclein and the microtubule cytoskeleton, whose interplay, indeed, is emerging but remains largely unexplored in both its physiology and pathology. α-Synuclein is a key protein involved in neurodegeneration, underlying those diseases termed synucleinopathies. Its propensity to interact with other proteins and structures renders the identification of neuronal death trigger extremely difficult. Conversely, the unbalance of microtubule cytoskeleton in terms of structure, dynamics and function is emerging as a point of convergence in neurodegeneration. Interestingly, α-synuclein and microtubules have been shown to interact and mediate cross-talks with other intracellular structures. This is supported by an increasing amount of evidence ranging from their direct interaction to the engagement of in-common partners and culminating with their respective impact on microtubule-dependent neuronal functions. Last, but not least, it is becoming even more clear that α-synuclein and tubulin work synergically towards pathological aggregation, ultimately resulting in neurodegeneration. In this respect, we supply a novel perspective towards the understanding of α-synuclein biology and, most importantly, of the link between α-synuclein with microtubule cytoskeleton and its impact for neurodegeneration and future development of novel therapeutic strategies.
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Affiliation(s)
- Samanta Mazzetti
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy; Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy
| | | | - Gianni Pezzoli
- Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy
| | - Graziella Cappelletti
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy; Center of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, Milano, Italy.
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Mazzetti S, Cannistraci R, Scifo C, Acone L, Alonge S, Foti M, Tarantini R, Lattuada G, Perseghin G, Mortara A. P240 SHORT–TERM EFFECT OF SGLT2I ON ECHOCARDIOGRAPHIC PARAMETERS IN HFREF PATIENTS TREATED WITH ARNI. Eur Heart J Suppl 2022. [DOI: 10.1093/eurheartj/suac012.232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
Background
Treatment with Sacubitril / Valsartan (ARNI) in patients with heart failure and reduced ejection fraction (HFrEF) promotes significant improvement of left ventricular remodeling along with positive outcomes in terms of hospitalization for heart failure, quality of life and mortality. In a previous study we demonstrated that ARNI significantly modifies myocardial longitudinal strain (GLS), one of the most reliable markers of myocardial contractility. It is still debated whether this effect remains unchanged regardless of the presence of diabetes and if it can be further increased by SGLT2 inhibitors, which in turn have been shown to reduce hospitalizations for heart failure and cardiovascular mortality.
Purpose
of this ongoing study is to measure, in HFrEF patients with or without T2DM, treated with ARNI and SGLT2i, short–term changes (6 months follow up) of the main echocardiographic parameters, including GLS Methods We enrolled 40 outpatients (32 male, age 65 + 10 years, EF 29,7 + 6,5%) on optimized medical treatment with class I medications, including ARNI at the maximum tolerated dose (starting dose 75 + 15mg, maximum titrated dose 190 + 10mg). Population was then divided into three groups: group 1 (20 pts) without T2DM; group 2 (11 pts) with T2DMI; group 3 (9 pts) with T2DM on SGLT2i treatment (4 with empaglifozin 10 mg, 5 with dapaglifozin 10 mg). No hemodynamic or metabolic complications related with therapy were observed, and no patients needed discontinuation or down–titration of therapy All patient underwent echocardiographic study at baseline and after six–month follow–up.
Conclusions
This ongoing study confirms that, in HFrEF patients, ARNI positively modifies left ventricular contraction and remodeling, and this effect is still verified regardless of the presence of T2DM. The association with SGLT2i, conversely, does not appear to provide further positive benefits on remodeling.
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Affiliation(s)
- S Mazzetti
- POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI PAVIA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, MONZA
| | - R Cannistraci
- POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI PAVIA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, MONZA
| | - C Scifo
- POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI PAVIA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, MONZA
| | - L Acone
- POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI PAVIA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, MONZA
| | - S Alonge
- POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI PAVIA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, MONZA
| | - M Foti
- POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI PAVIA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, MONZA
| | - R Tarantini
- POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI PAVIA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, MONZA
| | - G Lattuada
- POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI PAVIA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, MONZA
| | - G Perseghin
- POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI PAVIA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, MONZA
| | - A Mortara
- POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI PAVIA, POLICLINICO DI MONZA, MONZA; UNIVERSITÀ DEGLI STUDI DI MILANO BICOCCA, MONZA
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Mazzetti S, Barichella M, Giampietro F, Giana A, Calogero AM, Amadeo A, Palazzi N, Comincini A, Giaccone G, Bramerio M, Caronni S, Cereda V, Cereda E, Cappelletti G, Rolando C, Pezzoli G. Astrocytes expressing Vitamin D-activating enzyme identify Parkinson's disease. CNS Neurosci Ther 2022; 28:703-713. [PMID: 35166042 PMCID: PMC8981451 DOI: 10.1111/cns.13801] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 12/21/2021] [Accepted: 12/26/2021] [Indexed: 12/16/2022] Open
Abstract
Introduction Astrocytes are involved in Parkinson's disease (PD) where they could contribute to α‐Synuclein pathology but also to neuroprotection via α‐Synuclein clearance. The molecular signature underlying their dual role is still elusive. Given that vitamin D has been recently suggested to be protective in neurodegeneration, the aim of our study was to investigate astrocyte and neuron vitamin D pathway alterations and their correlation with α‐Synuclein aggregates (ie, oligomers and fibrils) in human brain obtained from PD patients. Methods The expression of vitamin D pathway components CYP27B1, CYP24A1, and VDR was examined in brains obtained from PD patients (Braak stage 6; n = 9) and control subjects (n = 4). We also exploited proximity ligation assay to identified toxic α‐Synuclein oligomers in human astrocytes. Results We found that vitamin D‐activating enzyme CYP27B1 identified a subpopulation of astrocytes exclusively in PD patients. CYP27B1 positive astrocytes could display neuroprotective features as they sequester α‐Synuclein oligomers and are associated with Lewy body negative neurons. Conclusion The presence of CYP27B1 astrocytes distinguishes PD patients and suggests their contribution to protect neurons and to ameliorate neuropathological traits.
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Affiliation(s)
- Samanta Mazzetti
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy.,Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy
| | - Michela Barichella
- Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy.,Parkinson Institute, ASST "G.Pini-CTO," Milan, Milan, Italy
| | | | - Angelica Giana
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy.,Parkinson Institute, ASST "G.Pini-CTO," Milan, Milan, Italy
| | | | - Alida Amadeo
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy.,Center of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, Milan, Italy
| | - Nicola Palazzi
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy
| | | | - Giorgio Giaccone
- Unit of Neuropathology and Neurology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Manuela Bramerio
- S. C. Divisione Oncologia Falck and S. C. Divisione Anatomia Patologica, Ospedale Niguarda Ca' Granda, Milan, Italy
| | - Serena Caronni
- Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy.,Parkinson Institute, ASST "G.Pini-CTO," Milan, Milan, Italy
| | - Viviana Cereda
- Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy.,Parkinson Institute, ASST "G.Pini-CTO," Milan, Milan, Italy
| | - Emanuele Cereda
- Clinical Nutrition and Dietetics Unit, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
| | - Graziella Cappelletti
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy.,Center of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, Milan, Italy
| | - Chiara Rolando
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy
| | - Gianni Pezzoli
- Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy.,Parkinson Institute, ASST "G.Pini-CTO," Milan, Milan, Italy
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8
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Barbieri F, Bosio AG, Pattarozzi A, Tonelli M, Bajetto A, Verduci I, Cianci F, Cannavale G, Palloni LMG, Francesconi V, Thellung S, Fiaschi P, Mazzetti S, Schenone S, Balboni B, Girotto S, Malatesta P, Daga A, Zona G, Mazzanti M, Florio T. Chloride intracellular channel 1 activity is not required for glioblastoma development but its inhibition dictates glioma stem cell responsivity to novel biguanide derivatives. J Exp Clin Cancer Res 2022; 41:53. [PMID: 35135603 PMCID: PMC8822754 DOI: 10.1186/s13046-021-02213-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 12/07/2021] [Indexed: 11/10/2022]
Abstract
Abstract
Background
Chloride intracellular channel-1 (CLIC1) activity controls glioblastoma proliferation. Metformin exerts antitumor effects in glioblastoma stem cells (GSCs) inhibiting CLIC1 activity, but its low potency hampers its translation in clinical settings.
Methods
We synthesized a small library of novel biguanide-based compounds that were tested as antiproliferative agents for GSCs derived from human glioblastomas, in vitro using 2D and 3D cultures and in vivo in the zebrafish model. Compounds were compared to metformin for both potency and efficacy in the inhibition of GSC proliferation in vitro (MTT, Trypan blue exclusion assays, and EdU labeling) and in vivo (zebrafish model), migration (Boyden chamber assay), invasiveness (Matrigel invasion assay), self-renewal (spherogenesis assay), and CLIC1 activity (electrophysiology recordings), as well as for the absence of off-target toxicity (effects on normal stem cells and toxicity for zebrafish and chick embryos).
Results
We identified Q48 and Q54 as two novel CLIC1 blockers, characterized by higher antiproliferative potency than metformin in vitro, in both GSC 2D cultures and 3D spheroids. Q48 and Q54 also impaired GSC self-renewal, migration and invasion, and displayed low systemic in vivo toxicity. Q54 reduced in vivo proliferation of GSCs xenotransplanted in zebrafish hindbrain. Target specificity was confirmed by recombinant CLIC1 binding experiments using microscale thermophoresis approach. Finally, we characterized GSCs from GBMs spontaneously expressing low CLIC1 protein, demonstrating their ability to grow in vivo and to retain stem-like phenotype and functional features in vitro. In these GSCs, Q48 and Q54 displayed reduced potency and efficacy as antiproliferative agents as compared to high CLIC1-expressing tumors. However, in 3D cultures, metformin and Q48 (but not Q54) inhibited proliferation, which was dependent on the inhibition dihydrofolate reductase activity.
Conclusions
These data highlight that, while CLIC1 is dispensable for the development of a subset of glioblastomas, it acts as a booster of proliferation in the majority of these tumors and its functional expression is required for biguanide antitumor class-effects. In particular, the biguanide-based derivatives Q48 and Q54, represent the leads to develop novel compounds endowed with better pharmacological profiles than metformin, to act as CLIC1-blockers for the treatment of CLIC1-expressing glioblastomas, in a precision medicine approach.
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9
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De Mattia C, Calderoni F, Colombo P, Defeudis A, Giannini V, Mazzetti S, Regge D, Rizzetto F, Vanzulli A, Torresin A. CT textural features in multi-center analysis: an example of tuning effort. Phys Med 2021. [DOI: 10.1016/s1120-1797(22)00282-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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10
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Cartelli D, Mazzetti S, Lombardi R, Cazzato D, Andelic M, Marchi M, Salvi E, D'Amato I, Cappelletti G, Lauria G. Ricolinostat induces microtubule acetylation and neurite regeneration in cellular models of diabetic and chemotheraphy-induced neuropathy. J Neurol Sci 2021. [DOI: 10.1016/j.jns.2021.119951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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11
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Amadeo A, Pizzi S, Comincini A, Modena D, Calogero AM, Madaschi L, Faustini G, Rolando C, Bellucci A, Pezzoli G, Mazzetti S, Cappelletti G. The Association between α-Synuclein and α-Tubulin in Brain Synapses. Int J Mol Sci 2021; 22:ijms22179153. [PMID: 34502063 PMCID: PMC8430732 DOI: 10.3390/ijms22179153] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 06/28/2021] [Revised: 08/17/2021] [Accepted: 08/19/2021] [Indexed: 12/14/2022] Open
Abstract
α-synuclein is a small protein that is mainly expressed in the synaptic terminals of nervous tissue. Although its implication in neurodegeneration is well established, the physiological role of α-synuclein remains elusive. Given its involvement in the modulation of synaptic transmission and the emerging role of microtubules at the synapse, the current study aimed at investigating whether α-synuclein becomes involved with this cytoskeletal component at the presynapse. We first analyzed the expression of α-synuclein and its colocalization with α-tubulin in murine brain. Differences were found between cortical and striatal/midbrain areas, with substantia nigra pars compacta and corpus striatum showing the lowest levels of colocalization. Using a proximity ligation assay, we revealed the direct interaction of α-synuclein with α-tubulin in murine and in human brain. Finally, the previously unexplored interaction of the two proteins in vivo at the synapse was disclosed in murine striatal presynaptic boutons through multiple approaches, from confocal spinning disk to electron microscopy. Collectively, our data strongly suggest that the association with tubulin/microtubules might actually be an important physiological function for α-synuclein in the synapse, thus suggesting its potential role in a neuropathological context.
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Affiliation(s)
- Alida Amadeo
- Department of Biosciences, University of Milan, Via Celoria 26, 20126 Milano, Italy; (S.P.); (A.C.); (D.M.); (A.M.C.); (C.R.); (S.M.)
- Center of Excellence on Neurodegenerative Diseases, University of Milan, Via Celoria 26, 20126 Milano, Italy
- Correspondence: (A.A.); (G.C.); Tel.: +39-025-031-4885 (A.A.); +39-025-031-4752 (G.C.)
| | - Sara Pizzi
- Department of Biosciences, University of Milan, Via Celoria 26, 20126 Milano, Italy; (S.P.); (A.C.); (D.M.); (A.M.C.); (C.R.); (S.M.)
| | - Alessandro Comincini
- Department of Biosciences, University of Milan, Via Celoria 26, 20126 Milano, Italy; (S.P.); (A.C.); (D.M.); (A.M.C.); (C.R.); (S.M.)
| | - Debora Modena
- Department of Biosciences, University of Milan, Via Celoria 26, 20126 Milano, Italy; (S.P.); (A.C.); (D.M.); (A.M.C.); (C.R.); (S.M.)
| | - Alessandra Maria Calogero
- Department of Biosciences, University of Milan, Via Celoria 26, 20126 Milano, Italy; (S.P.); (A.C.); (D.M.); (A.M.C.); (C.R.); (S.M.)
| | - Laura Madaschi
- UNITECH NOLIMITS, University of Milan, Via Celoria 26, 20133 Milan, Italy;
| | - Gaia Faustini
- Division of Pharmacology, Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy; (G.F.); (A.B.)
| | - Chiara Rolando
- Department of Biosciences, University of Milan, Via Celoria 26, 20126 Milano, Italy; (S.P.); (A.C.); (D.M.); (A.M.C.); (C.R.); (S.M.)
| | - Arianna Bellucci
- Division of Pharmacology, Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy; (G.F.); (A.B.)
| | - Gianni Pezzoli
- Fondazione Grigioni per il Morbo di Parkinson, Via Zuretti 35, 20125 Milano, Italy;
| | - Samanta Mazzetti
- Department of Biosciences, University of Milan, Via Celoria 26, 20126 Milano, Italy; (S.P.); (A.C.); (D.M.); (A.M.C.); (C.R.); (S.M.)
- Fondazione Grigioni per il Morbo di Parkinson, Via Zuretti 35, 20125 Milano, Italy;
| | - Graziella Cappelletti
- Department of Biosciences, University of Milan, Via Celoria 26, 20126 Milano, Italy; (S.P.); (A.C.); (D.M.); (A.M.C.); (C.R.); (S.M.)
- Center of Excellence on Neurodegenerative Diseases, University of Milan, Via Celoria 26, 20126 Milano, Italy
- Correspondence: (A.A.); (G.C.); Tel.: +39-025-031-4885 (A.A.); +39-025-031-4752 (G.C.)
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12
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Salemi M, Mazzetti S, De Leonardis M, Giampietro F, Medici V, Poloni TE, Cannarella R, Giaccone G, Pezzoli G, Cappelletti G, Ferri R. Poly (ADP-ribose) polymerase 1 and Parkinson's disease: A study in post-mortem human brain. Neurochem Int 2021; 144:104978. [PMID: 33516746 DOI: 10.1016/j.neuint.2021.104978] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 01/06/2021] [Accepted: 01/23/2021] [Indexed: 02/07/2023]
Abstract
Poly (ADP-ribose) polymerase 1 (PARP1) is crucial in both maintenance of genome integrity and cell death. PARP1 activation has been very recently linked to Parkinson's disease (PD) and its role in inducing the pathologic accumulation of α-Synuclein demonstrated in a PD mouse model. The objective of this study was to investigate the presence and localization of PARP1 in PD brain. PARP1 localization was assessed by immunostaining and confocal microscopy in post-mortem human brains obtained from PD patients (Braak stage VI) compared to controls. PARP1 positive nuclei in substantia nigra, mainly in dopaminergic neurons but also in astrocytes and oligodendrocytes, were decreased in PD. The same alteration was observed in several areas that are affected in PD pathology, namely the dorsal motor nucleus of vagus, frontal and cingulate cortex, whereas no changes in PARP1 staining were detectable in the inferior olivary nucleus that is unaffected in PD. In addition, PARP1 co-localizes with α-Synuclein that is accumulated in the cytoplasm and in Lewy bodies of PD tissue sections. Our data reveal previously unknown changes of PARP1 localization in the brain of PD patients, in both neurons and glia, supporting its widespread involvement in this pathology and its potential use as a therapeutic target.
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Affiliation(s)
| | - Samanta Mazzetti
- Fondazione Grigioni per il Morbo di Parkinson, via Zuretti 35, I-20135, Milan, Italy
| | | | | | - Valentina Medici
- Department of Neurology and Neuropathology, Golgi-Cenci Foundation, Abbiategrasso, Milan, Italy
| | - Tino Emanuele Poloni
- Department of Neurology and Neuropathology, Golgi-Cenci Foundation, Abbiategrasso, Milan, Italy
| | - Rossella Cannarella
- Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
| | - Giorgio Giaccone
- Unit of Neuropathology and Neurology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Gianni Pezzoli
- Fondazione Grigioni per il Morbo di Parkinson, via Zuretti 35, I-20135, Milan, Italy
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13
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Mazzetti S, Basellini MJ, Ferri V, Cassani E, Cereda E, Paolini M, Calogero AM, Bolliri C, De Leonardis M, Sacilotto G, Cilia R, Cappelletti G, Pezzoli G. α-Synuclein oligomers in skin biopsy of idiopathic and monozygotic twin patients with Parkinson's disease. Brain 2020; 143:920-931. [PMID: 32025699 PMCID: PMC7089656 DOI: 10.1093/brain/awaa008] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 11/22/2019] [Accepted: 12/02/2019] [Indexed: 12/18/2022] Open
Abstract
A variety of cellular processes, including vesicle clustering in the presynaptic compartment, are impaired in Parkinson’s disease and have been closely associated with α-synuclein oligomerization. Emerging evidence proves the existence of α-synuclein-related pathology in the peripheral nervous system, even though the presence of α-synuclein oligomers in situ in living patients remains poorly investigated. In this case-control study, we show previously undetected α-synuclein oligomers within synaptic terminals of autonomic fibres in skin biopsies by means of the proximity ligation assay and propose a procedure for their quantification (proximity ligation assay score). Our study revealed a significant increase in α-synuclein oligomers in consecutive patients with Parkinson’s disease compared to consecutive healthy controls (P < 0.001). Proximity ligation assay score (threshold value > 96 using receiver operating characteristic) was found to have good sensitivity, specificity and positive predictive value (82%, 86% and 89%, respectively). Furthermore, to disclose the role of putative genetic predisposition in Parkinson’s disease aetiology, we evaluated the differential accumulation of oligomers in a unique cohort of 19 monozygotic twins discordant for Parkinson’s disease. The significant difference between patients and healthy subjects was confirmed in twins. Intriguingly, although no difference in median values was detected between consecutive healthy controls and healthy twins, the prevalence of healthy subjects positive for proximity ligation assay score was significantly greater in twins than in the consecutive cohort (47% versus 14%, P = 0.019). This suggests that genetic predisposition is important, but not sufficient, in the aetiology of the disease and strengthens the contribution of environmental factors. In conclusion, our data provide evidence that α-synuclein oligomers accumulate within synaptic terminals of autonomic fibres of the skin in Parkinson’s disease for the first time. This finding endorses the hypothesis that α-synuclein oligomers could be used as a reliable diagnostic biomarker for Parkinson’s disease. It also offers novel insights into the physiological and pathological roles of α-synuclein in the peripheral nervous system.
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Affiliation(s)
- Samanta Mazzetti
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy.,Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy
| | - Milo J Basellini
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy.,Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy
| | - Valentina Ferri
- Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy.,Parkinson Institute, ASST 'Gaetano Pini-CTO', Milan, Italy
| | - Erica Cassani
- Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy.,Parkinson Institute, ASST 'Gaetano Pini-CTO', Milan, Italy
| | - Emanuele Cereda
- Clinical Nutrition and Dietetics Unit, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
| | - Matilde Paolini
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy
| | - Alessandra M Calogero
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy.,Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy
| | - Carlotta Bolliri
- Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy.,Parkinson Institute, ASST 'Gaetano Pini-CTO', Milan, Italy
| | - Mara De Leonardis
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy
| | | | - Roberto Cilia
- Parkinson Institute, ASST 'Gaetano Pini-CTO', Milan, Italy
| | - Graziella Cappelletti
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy.,Center of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, Milan, Italy
| | - Gianni Pezzoli
- Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy.,Parkinson Institute, ASST 'Gaetano Pini-CTO', Milan, Italy
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14
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Mazzetti S, De Leonardis M, Gagliardi G, Calogero AM, Basellini MJ, Madaschi L, Costa I, Cacciatore F, Spinello S, Bramerio M, Cilia R, Rolando C, Giaccone G, Pezzoli G, Cappelletti G. Phospho-HDAC6 Gathers Into Protein Aggregates in Parkinson's Disease and Atypical Parkinsonisms. Front Neurosci 2020; 14:624. [PMID: 32655357 PMCID: PMC7324673 DOI: 10.3389/fnins.2020.00624] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Accepted: 05/19/2020] [Indexed: 01/10/2023] Open
Abstract
HDAC6 is a unique histone deacetylase that targets cytoplasmic non-histone proteins and has a specific ubiquitin-binding activity. Both of these activities are required for HDAC6-mediated formation of aggresomes, which contain misfolded proteins that will ultimately be degraded via autophagy. HDAC6 deacetylase activity is increased following phosphorylation on serine 22 (phospho-HDAC6). In human, HDAC6 localizes in neuronal Lewy bodies in Parkinson’s disease (PD) and in oligodendrocytic Papp–Lantos bodies in multiple system atrophy (MSA). However, the expression of phospho-HDAC6 in post-mortem human brains is currently unexplored. Here, we evaluate and compare the distribution of HDAC6 and its phosphorylated form in human brains obtained from patients affected by three forms of parkinsonism: two synucleinopathies (PD and MSA) and a tauopathy (progressive supranuclear palsy, PSP). We find that both HDAC6 and its phosphorylated form localize with pathological protein aggregates, including α-synuclein-positive Lewy bodies in PD and Papp–Lantos bodies in MSA, and phospho-tau-positive neurofibrillary tangles in PSP. We further find a direct interaction of HDAC6 with α-synuclein with proximity ligation assay (PLA) in neuronal cell of PD patients. Taken together, our findings suggest that both HDAC6 and phospho-HDAC6 regulate the homeostasis of intra-neuronal proteins in parkinsonism.
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Affiliation(s)
- Samanta Mazzetti
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy.,Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy
| | - Mara De Leonardis
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy
| | - Gloria Gagliardi
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy
| | - Alessandra Maria Calogero
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy.,Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy
| | | | - Laura Madaschi
- UNITECH NO LIMITS, Università degli Studi di Milano, Milan, Italy
| | - Ilaria Costa
- Imaging TDU, IFOM Foundation, The FIRC Institute of Molecular Oncology, Milan, Italy
| | - Francesca Cacciatore
- Unit of Neuropathology and Neurology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Sonia Spinello
- Unit of Neuropathology and Neurology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Manuela Bramerio
- S. C. Divisione Oncologia Falck and S. C. Divisione Anatomia Patologica, Ospedale Niguarda Ca' Granda, Milan, Italy
| | - Roberto Cilia
- Parkinson Institute, ASST "G.Pini-CTO," Milan, Italy
| | - Chiara Rolando
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy
| | - Giorgio Giaccone
- Unit of Neuropathology and Neurology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Gianni Pezzoli
- Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy.,Parkinson Institute, ASST "G.Pini-CTO," Milan, Italy
| | - Graziella Cappelletti
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy.,Center of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, Milan, Italy
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15
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Calogero AM, Mazzetti S, Pezzoli G, Cappelletti G. Neuronal microtubules and proteins linked to Parkinson's disease: a relevant interaction? Biol Chem 2020; 400:1099-1112. [PMID: 31256059 DOI: 10.1515/hsz-2019-0142] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [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: 01/31/2019] [Accepted: 06/24/2019] [Indexed: 12/13/2022]
Abstract
Neuronal microtubules are key determinants of cell morphology, differentiation, migration and polarity, and contribute to intracellular trafficking along axons and dendrites. Microtubules are strictly regulated and alterations in their dynamics can lead to catastrophic effects in the neuron. Indeed, the importance of the microtubule cytoskeleton in many human diseases is emerging. Remarkably, a growing body of evidence indicates that microtubule defects could be linked to Parkinson's disease pathogenesis. Only a few of the causes of the progressive neuronal loss underlying this disorder have been identified. They include gene mutations and toxin exposure, but the trigger leading to neurodegeneration is still unknown. In this scenario, the evidence showing that mutated proteins in Parkinson's disease are involved in the regulation of the microtubule cytoskeleton is intriguing. Here, we focus on α-Synuclein, Parkin and Leucine-rich repeat kinase 2 (LRRK2), the three main proteins linked to the familial forms of the disease. The aim is to dissect their interaction with tubulin and microtubules in both physiological and pathological conditions, in which these proteins are overexpressed, mutated or absent. We highlight the relevance of such an interaction and suggest that these proteins could trigger neurodegeneration via defective regulation of the microtubule cytoskeleton.
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Affiliation(s)
- Alessandra M Calogero
- Department of Biosciences, Università degli Studi di Milano, via Celoria 26, I-20133 Milan, Italy
| | - Samanta Mazzetti
- Department of Biosciences, Università degli Studi di Milano, via Celoria 26, I-20133 Milan, Italy.,Fondazione Grigioni per il Morbo di Parkinson, via Zuretti 35, I-20135 Milan, Italy
| | - Gianni Pezzoli
- Fondazione Grigioni per il Morbo di Parkinson, via Zuretti 35, I-20135 Milan, Italy.,Parkinson Institute, ASST "G.Pini-CTO", via Bignami 1, I-20133 Milan, Italy
| | - Graziella Cappelletti
- Department of Biosciences, Università degli Studi di Milano, via Celoria 26, I-20133 Milan, Italy.,Center of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, via Balzaretti, I-20133 Milan, Italy
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16
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Giannini V, Mazzetti S, Bertotto I, Chiarenza C, Cauda S, Delmastro E, Bracco C, Di Dia A, Leone F, Medico E, Pisacane A, Ribero D, Stasi M, Regge D. Predicting locally advanced rectal cancer response to neoadjuvant therapy with 18F-FDG PET and MRI radiomics features. Eur J Nucl Med Mol Imaging 2019; 46:878-888. [PMID: 30637502 DOI: 10.1007/s00259-018-4250-6] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [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: 10/01/2018] [Accepted: 12/26/2018] [Indexed: 12/12/2022]
Abstract
PURPOSE Pathological complete response (pCR) following neoadjuvant chemoradiotherapy or radiotherapy in locally advanced rectal cancer (LARC) is reached in approximately 15-30% of cases, therefore it would be useful to assess if pretreatment of 18F-FDG PET/CT and/or MRI texture features can reliably predict response to neoadjuvant therapy in LARC. METHODS Fifty-two patients were dichotomized as responder (pR+) or non-responder (pR-) according to their pathological tumor regression grade (TRG) as follows: 22 as pR+ (nine with TRG = 1, 13 with TRG = 2) and 30 as pR- (16 with TRG = 3, 13 with TRG = 4 and 1 with TRG = 5). First-order parameters and 21 second-order texture parameters derived from the Gray-Level Co-Occurrence matrix were extracted from semi-automatically segmented tumors on T2w MRI, ADC maps, and PET/CT acquisitions. The role of each texture feature in predicting pR+ was assessed with monoparametric and multiparametric models. RESULTS In the mono-parametric approach, PET homogeneity reached the maximum AUC (0.77; sensitivity = 72.7% and specificity = 76.7%), while PET glycolytic volume and ADC dissimilarity reached the highest sensitivity (both 90.9%). In the multiparametric analysis, a logistic regression model containing six second-order texture features (five from PET and one from T2w MRI) yields the highest predictivity in distinguish between pR+ and pR- patients (AUC = 0.86; sensitivity = 86%, and specificity = 83% at the Youden index). CONCLUSIONS If preliminary results of this study are confirmed, pretreatment PET and MRI could be useful to personalize patient treatment, e.g., avoiding toxicity of neoadjuvant therapy in patients predicted pR-.
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Affiliation(s)
- V Giannini
- Imaging Unit, Candiolo Cancer Institute, FPO-IRCCS, Strada Provinciale 142 km 3.95, 10060, Candiolo, TO, Italy. .,Department of Surgical Sciences, University of Turin, 10124, Turin, Italy.
| | - S Mazzetti
- Imaging Unit, Candiolo Cancer Institute, FPO-IRCCS, Strada Provinciale 142 km 3.95, 10060, Candiolo, TO, Italy.,Department of Surgical Sciences, University of Turin, 10124, Turin, Italy
| | - I Bertotto
- Imaging Unit, Candiolo Cancer Institute, FPO-IRCCS, Strada Provinciale 142 km 3.95, 10060, Candiolo, TO, Italy
| | - C Chiarenza
- Imaging Unit, Candiolo Cancer Institute, FPO-IRCCS, Strada Provinciale 142 km 3.95, 10060, Candiolo, TO, Italy
| | - S Cauda
- Nuclear Medicine Unit, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Italy
| | - E Delmastro
- Radiation Therapy Unit, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Italy
| | - C Bracco
- Medical Physics Unit, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Italy
| | - A Di Dia
- Medical Physics Unit, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Italy
| | - F Leone
- Medical Oncology Unit, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Italy
| | - E Medico
- Laboratory of Oncogenomics, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Italy
| | - A Pisacane
- Pathology Unit, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Italy
| | - D Ribero
- Hepatobilio-Pancreatic and Colorectal Surgery Unit, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Italy
| | - M Stasi
- Medical Physics Unit, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Italy
| | - D Regge
- Imaging Unit, Candiolo Cancer Institute, FPO-IRCCS, Strada Provinciale 142 km 3.95, 10060, Candiolo, TO, Italy.,Department of Surgical Sciences, University of Turin, 10124, Turin, Italy
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17
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Mazzetti S, Giannini V, Di Dia A, Bracco C, Bresciani S, Cauda S, Varetto T, Mastro ED, Gabriele P, Regge D, Stasi M. 228. Predicting neoadjuvant therapy response in locally advanced rectal cancer using texture features. Phys Med 2018. [DOI: 10.1016/j.ejmp.2018.04.239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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18
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Mazzetti S, Giannini V, Di Dia A, Bracco C, Bresciani S, Cauda S, Varetto T, Del Mastro E, Gabriele P, Regge D, Stasi M. 16. Predicting neoadjuvant therapy response in locally advanced rectal cancer using texture features. Phys Med 2018. [DOI: 10.1016/j.ejmp.2018.04.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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19
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Mazzetti S, Giannini V, Russo F, Regge D. Computer-aided diagnosis of prostate cancer using multi-parametric MRI: comparison between PUN and Tofts models. Phys Med Biol 2018; 63:095004. [PMID: 29570456 DOI: 10.1088/1361-6560/aab956] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Computer-aided diagnosis (CAD) systems are increasingly being used in clinical settings to report multi-parametric magnetic resonance imaging (mp-MRI) of the prostate. Usually, CAD systems automatically highlight cancer-suspicious regions to the radiologist, reducing reader variability and interpretation errors. Nevertheless, implementing this software requires the selection of which mp-MRI parameters can best discriminate between malignant and non-malignant regions. To exploit functional information, some parameters are derived from dynamic contrast-enhanced (DCE) acquisitions. In particular, much CAD software employs pharmacokinetic features, such as K trans and k ep, derived from the Tofts model, to estimate a likelihood map of malignancy. However, non-pharmacokinetic models can be also used to describe DCE-MRI curves, without any requirement for prior knowledge or measurement of the arterial input function, which could potentially lead to large errors in parameter estimation. In this work, we implemented an empirical function derived from the phenomenological universalities (PUN) class to fit DCE-MRI. The parameters of the PUN model are used in combination with T2-weighted and diffusion-weighted acquisitions to feed a support vector machine classifier to produce a voxel-wise malignancy likelihood map of the prostate. The results were all compared to those for a CAD system based on Tofts pharmacokinetic features to describe DCE-MRI curves, using different quality aspects of image segmentation, while also evaluating the number and size of false positive (FP) candidate regions. This study included 61 patients with 70 biopsy-proven prostate cancers (PCa). The metrics used to evaluate segmentation quality between the two CAD systems were not statistically different, although the PUN-based CAD reported a lower number of FP, with reduced size compared to the Tofts-based CAD. In conclusion, the CAD software based on PUN parameters is a feasible means with which to detect PCa, without affecting segmentation quality, and hence it could be successfully applied in clinical settings, improving the automated diagnosis process and reducing computational complexity.
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Affiliation(s)
- S Mazzetti
- Department of Surgical Sciences, University of Torino, 10124 Turin, Italy. Department of Radiology, Candiolo Cancer Institute-FPO, IRCCS, 10060 Candiolo, Turin, Italy
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Annovazzi L, Mellai M, Bovio E, Mazzetti S, Pollo B, Schiffer D. Microglia immunophenotyping in gliomas. Oncol Lett 2017; 15:998-1006. [PMID: 29399160 PMCID: PMC5772881 DOI: 10.3892/ol.2017.7386] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2017] [Accepted: 09/12/2017] [Indexed: 12/26/2022] Open
Abstract
Microglia, once assimilated to peripheral macrophages, in gliomas has long been discussed and currently it is hypothesized to play a pro-tumor role in tumor progression. Uncertain between M1 and M2 polarization, it exchanges signals with glioma cells to create an immunosuppressive microenvironment and stimulates cell proliferation and migration. Four antibodies are currently used for microglia/macrophage identification in tissues that exhibit different cell forms and cell localization. The aim of the present work was to describe the distribution of the different cell forms and to deduce their significance on the basis of what is known on their function from the literature. Normal resting microglia, reactive microglia, intermediate and bumpy forms and macrophage-like cells can be distinguished by Iba1, CD68, CD16 and CD163 and further categorized by CD11b, CD45, c-MAF and CD98. The number of microglia/macrophages strongly increased from normal cortex and white matter to infiltrating and solid tumors. The ramified microglia accumulated in infiltration areas of both high- and low-grade gliomas, when hypertrophy and hyperplasia occur. In solid tumors, intermediate and bumpy forms prevailed and there is a large increase of macrophage-like cells in glioblastoma. The total number of microglia cells did not vary among the three grades of malignancy, but macrophage-like cells definitely prevailed in high-grade gliomas and frequently expressed CD45 and c-MAF. CD98+ cells were present. Microglia favors tumor progression, but many aspects suggest that the phagocytosing function is maintained. CD98+ cells can be the product of fusion, but also of phagocytosis. Microglia correlated with poorer survival in glioblastoma, when considering CD163+ cells, whereas it did not change prognosis in isocitrate dehydrogenase-mutant low grade gliomas.
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Affiliation(s)
- Laura Annovazzi
- Research Center, Policlinico di Monza Foundation, I-13100 Vercelli, Italy
| | - Marta Mellai
- Research Center, Policlinico di Monza Foundation, I-13100 Vercelli, Italy
| | - Enrica Bovio
- Research Center, Policlinico di Monza Foundation, I-13100 Vercelli, Italy
| | - Samanta Mazzetti
- Neuropathology Unit, Istituto Neurologico 'Carlo Besta' IRCCS Foundation, I-20133 Milano, Italy
| | - Bianca Pollo
- Neuropathology Unit, Istituto Neurologico 'Carlo Besta' IRCCS Foundation, I-20133 Milano, Italy
| | - Davide Schiffer
- Research Center, Policlinico di Monza Foundation, I-13100 Vercelli, Italy
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Pollo B, Scaranzin S, Mazzetti S, Calatozzolo C, Farinotti M, Marando A, Silvani A, Di Meco F, Patanè M. P03.19 AQP4 in brain metastasis: its role and cross talk with the brain microenvironment. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox036.134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Vignati A, Mazzetti S, Giannini V, Russo F, Bollito E, Porpiglia F, Stasi M, Regge D. Texture features on T2-weighted magnetic resonance imaging: new potential biomarkers for prostate cancer aggressiveness. Phys Med Biol 2015; 60:2685-701. [PMID: 25768265 DOI: 10.1088/0031-9155/60/7/2685] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
To explore contrast (C) and homogeneity (H) gray-level co-occurrence matrix texture features on T2-weighted (T2w) Magnetic Resonance (MR) images and apparent diffusion coefficient (ADC) maps for predicting prostate cancer (PCa) aggressiveness, and to compare them with traditional ADC metrics for differentiating low- from intermediate/high-grade PCas. The local Ethics Committee approved this prospective study of 93 patients (median age, 65 years), who underwent 1.5 T multiparametric endorectal MR imaging before prostatectomy. Clinically significant (volume ≥0.5 ml) peripheral tumours were outlined on histological sections, contoured on T2w and ADC images, and their pathological Gleason Score (pGS) was recorded. C, H, and traditional ADC metrics (mean, median, 10th and 25th percentile) were calculated on the largest lesion slice, and correlated with the pGS through the Spearman correlation coefficient. The area under the receiver operating characteristic curve (AUC) assessed how parameters differentiate pGS = 6 from pGS ≥ 7. The dataset included 49 clinically significant PCas with a balanced distribution of pGS. The Spearman ρ and AUC values on ADC were: -0.489, 0.823 (mean); -0.522, 0.821 (median); -0.569, 0.854 (10th percentile); -0.556, 0.854 (25th percentile); -0.386, 0.871 (C); 0.533, 0.923 (H); while on T2w they were: -0.654, 0.945 (C); 0.645, 0.962 (H). AUC of H on ADC and T2w, and C on T2w were significantly higher than that of the mean ADC (p = 0.05). H and C calculated on T2w images outperform ADC parameters in correlating with pGS and differentiating low- from intermediate/high-risk PCas, supporting the role of T2w MR imaging in assessing PCa biological aggressiveness.
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Affiliation(s)
- A Vignati
- Department of Radiology of Candiolo Cancer Institute-FPO, IRCCS, Strada Provinciale 142 km 3.95, 10060 Candiolo, Italy
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Pollo B, Mazzetti S, Patane M, Calatozzolo C, Di Meco F, Silvani A. ME-16 * IS AQUAPORIN4 (AQP4) INVOLVED IN ADULT HUMAN MEDULLOBLASTOMA DISSEMINATION OR IN A BENEFICIAL BARRIER FORMATION? Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou261.15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Pollo B, Mazzetti S, Patane M, Calatozzolo C, Cacciatore F, Silvani A, Di Meco F, Nunziata R. O1.04 * ROLE OF AQUAPORIN4 IN HUMAN BRAIN METASTASES: STUDY OF 60 CASES. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou174.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mazzetti S, Calatozzolo C, Patane M, Farinotti M, Nunziata R, Lodrini S, Bianca P. O1.06 * NOVEL MARKERS OF MENINGIOMA AGGRESSIVENESS - A STUDY OF MENINGIOMA VERSUS PERITUMORAL NERVOUS TISSUE. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou174.6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Calatozzolo C, Patane M, Mazzetti S, Eoli M, Farinotti M, Nunziata R, Finocchiaro G, Pollo B. O8.06 * ATRX AND TERT EXPRESSION IN RELAPSING LOW GRADE GLIOMA. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou174.67] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Patane M, Calatozzolo C, Mazzetti S, Nunziata R, Spinello S, Farinotti M, Finocchiaro G, Pollo B. P17.71 * ROLE OF ATRX AND TERT EXPRESSION AS DIAGNOSTIC AND PROGNOSTIC FACTORS ON ANAPLASTIC GLIOMAS. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou174.400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Giannini V, Vignati A, Mirasole S, Mazzetti S, Russo F, Stasi M, Regge D. MR-T2-weighted signal intensity: a new imaging biomarker of prostate cancer aggressiveness. Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization 2014. [DOI: 10.1080/21681163.2014.910476] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Mazzetti S, Bracco C, Regge D, Caivano R, Russo F, Stasi M. Choline-containing compounds quantification by 1H NMR spectroscopy using external reference and noise measurements. Phys Med 2013; 29:677-83. [DOI: 10.1016/j.ejmp.2012.07.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 06/22/2012] [Accepted: 07/01/2012] [Indexed: 11/26/2022] Open
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Mazzetti S, Gliozzi AS, Bracco C, Russo F, Regge D, Stasi M. Comparison between PUN and Tofts models in the quantification of dynamic contrast-enhanced MR imaging. Phys Med Biol 2012. [PMID: 23202297 DOI: 10.1088/0031-9155/57/24/8443] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Dynamic contrast-enhanced study in magnetic resonance imaging (DCE-MRI) is an important tool in oncology to visualize tissues vascularization and to define tumour aggressiveness on the basis of an altered perfusion and permeability. Pharmacokinetic models are generally used to extract hemodynamic parameters, providing a quantitative description of the contrast uptake and wash-out. Empirical functions can also be used to fit experimental data without the need of any assumption about tumour physiology, as in pharmacokinetic models, increasing their diagnostic utility, in particular when automatic diagnosis systems are implemented on the basis of an MRI multi-parametric approach. Phenomenological universalities (PUN) represent a novel tool for experimental research and offer a simple and systematic method to represent a set of data independent of the application field. DCE-MRI acquisitions can thus be advantageously evaluated by the extended PUN class, providing a convenient diagnostic tool to analyse functional studies, adding a new set of features for the classification of malignant and benign lesions in computer aided detection systems. In this work the Tofts pharmacokinetic model and the class EU1 generated by the PUN description were compared in the study of DCE-MRI of the prostate, evaluating complexity of model implementation, goodness of fitting results, classification performances and computational cost. The mean R² obtained with the EU1 and Tofts model were equal to 0.96 and 0.90, respectively, and the classification performances achieved by the EU1 model and the Tofts implementation discriminated malignant from benign tissues with an area under the receiver operating characteristic curve equal to 0.92 and 0.91, respectively. Furthermore, the EU1 model has a simpler functional form which reduces implementation complexity and computational time, requiring 6 min to complete a patient elaboration process, instead of 8 min needed for the Tofts model analysis.
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Affiliation(s)
- S Mazzetti
- Institute for Cancer Research and Treatment, Strada Provinciale 142, km 3.95, 10060 Candiolo, Torino, Italy.
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Russo F, Mazzetti S, Grignani G, De Rosa G, Aglietta M, Anselmetti GC, Stasi M, Regge D. In vivo characterisation of soft tissue tumours by 1.5-T proton MR spectroscopy. Eur Radiol 2011; 22:1131-9. [DOI: 10.1007/s00330-011-2350-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2011] [Revised: 10/07/2011] [Accepted: 10/15/2011] [Indexed: 12/25/2022]
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Mazzetti S, Wolff C, Yocum A, Reidy P, Douglass M, Cochran M, Douglass M. Effect of maximal and slow versus recreational muscle contractions on energy expenditure in trained and untrained men. J Sports Med Phys Fitness 2011; 51:381-392. [PMID: 21904276] [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: 05/31/2023]
Abstract
AIM The primary purpose of this study was to compare energy expenditure among resistance exercise protocols using maximally explosive or slow contractions versus recreational in trained and untrained men. METHODS Seven trained (21.9±2.1 yrs) and seven untrained men (20.1±2.2 yrs) performed three nearly identical exercise protocols, and a no-exercise (CONTROL) session in a randomly assigned, counterbalanced order. Subjects performed three sets of squats, dumbbell-row, deadlift, bench press, lat-pulldown, shoulder press, arm curls and dips using either recreational (REC), 2s (SLOW) or maximally explosive contractions (MAX). Expired air was collected continuously for 15 min before, ~37-43 min during, and 2 hr postexercise. Finger prick samples (25 µL) were collected and analyzed for blood lactate (BL) (mmol.L-1) before, immediately after, and during 120 min of recovery. RESULTS Rates of energy expenditure were significantly (P≤0.05) greater for MAX than SLOW and REC during all exercises and +5 min after exercise in trained men, and MAX was greater than REC during all exercises except deadlift in untrained men. In trained men, total kcal were significantly greater (P≤0.05) with MAX (507±48) compared to REC (431±47), but not in untrained. Conversely, BL was significantly greater (P≤0.05) after SLOW compared to REC in trained and untrained men, while BL was only greater after MAX versus REC in trained men. CONCLUSION For whole-body resistance exercise programs, maximally explosive contractions optimize energy expenditure in trained men, but slow contractions are recommended for untrained exercisers. Therefore, contraction intensity should be considered a program design variable for exercise prescriptions aimed to improve general health and fitness.
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Affiliation(s)
- S Mazzetti
- Laboratory for Human Performance, Salisbury University, Salisbury, MD, USA.
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Gliozzi AS, Mazzetti S, Delsanto PP, Regge D, Stasi M. Phenomenological universalities: a novel tool for the analysis of dynamic contrast enhancement in magnetic resonance imaging. Phys Med Biol 2011; 56:573-86. [PMID: 21212471 DOI: 10.1088/0031-9155/56/3/004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Dynamic contrast enhancement in magnetic resonance imaging (DCE-MRI) is a promising tool for the clinical diagnosis of tumors, whose implementation may be improved through the use of suitable hemodynamic models. If one prefers to avoid assumptions about the tumor physiology, empirical fitting functions may be adopted. For this purpose, in this paper we discuss the exploitation of a recently proposed phenomenological universalities (PUN) formalism. In fact, we show that a novel PUN class may be used to describe the time-signal intensity curves in both healthy and tumoral tissues, discriminating between the two cases and thus potentially providing a convenient diagnostic tool. The proposed approach is applied to analysis of the DCE-MRI data relative to a study group composed of ten patients with spine tumors.
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Affiliation(s)
- A S Gliozzi
- Physics Department, Politecnico di Torino, Torino, Italy.
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Mora B, Base E, Schmid W, Andreas M, Weber U, Junreitmaier M, Foerster F, Hiesmayr M, Tschernich HD, Guldbrand D, Goetzsche O, Eika B, Fumagalli S, Francini S, Gabbai D, Pedri S, Casalone Rinaldi M, Makhanian Y, Sollami R, Tarantini F, Marchionni N, Azcarate PM, Castano S, Rodriguez-Manero M, Arraiza M, Levy B, Barba J, Rabago G, Bastarrika G, Rus H, Radoi M, Ciurea C, Boda D, Erdei T, Denes M, Mihalcz A, Kardos A, Foldesi CS, Temesvari A, Lengyel M, Cameli M, Lisi M, Righini F, Ballo P, Henein M, Mondillo S, Nistri S, Galderisi M, Ballo PC, Pagliani L, Olivotto I, Santoro A, Papesso B, Innelli P, Cecchi F, Mondillo S, Hristova K, Katova TZ, Kostova V, Simova Y, Nesheva N, Ivanovic B, Tadic MT, Simic DS, Rao CM, Aguglia D, Casciola G, Imbesi C, Marvelli A, Sgro M, Benedetto D, Tripepi G, Zoccali C, Benedetto FA, Mantziari L, Kamperidis V, Damvopoulou E, Ventoulis I, Giannakoulas G, Paraskevaidis S, Vassilikos V, Karvounis H, Styliadis IH, Sonder TK, Loegstrup BB, Lambrechtsen J, Van Bortel LM, Segers P, Egstrup K, Tho A, Moceri P, Bertora D, Gibelin P, Cho EJ, Choi KY, Kim BJ, Kim DB, Jang SW, Park CS, Jung HO, Jeon HK, Youn HJ, Kim JH, Donal E, Coquerel N, Bodi S, Thebault C, Kervio G, Carre F, Daly MJ, Fairley SL, Doherty R, Ashfield K, Kirkpatrick R, Smith B, Buchanan J, Hill L, Dixon LJ, Rosca M, O' Connor K, Magne J, Romano G, Calin A, Popescu BA, Beladan CC, Pierard L, Ginghina C, Lancellotti P, Bochenek T, Wita K, Tabor Z, Grabka M, Elzbieciak M, Trusz-Gluza M, Moreau O, Thebault C, Kervio G, Leclercq C, Donal E, Sahlen A, Shahgaldi K, Aminoff A, Aagaard P, Manouras A, Winter R, Ehrenborg E, Braunschweig F, Bedetti G, Gargani L, Pizzi C, Sicari R, Picano E, Ballo P, Nistri S, Innelli P, Galderisi M, Mondillo S, Zhang J, Zhang HB, Duan YY, Chen LL, Li J, Liu LW, Zhu T, Li HL, Su HL, Zhou XD, Ruiz Ortiz M, Mesa Rubio D, Delgado Ortega M, Romo Penas E, Toledano Degado F, Leon Del Pino C, Lopez Aguilera J, Villanueva Fernandez E, Cejudo Diaz Del Campo L, Suarez De Lezo J, Abergel E, Simon M, Dehant P, Bogino E, Jimenez M, Verdier JC, Chauvel C, Albertsen AE, Nielsen JC, Mortensen PT, Egeblad H, Nasr GM, Tawfik S, Omar A, Olofsson M, Boman K, Sonder TK, Loegstrup BB, Lambrechtsen J, Segers P, Van Bortel LM, Egstrup K, Rezzoug N, Vaes B, Degryse J, Vanoverschelde JL, Pasquet AA, Poggio D, Bonadies M, Pacher V, Mazzetti S, Grillo M, D'elia E, Khouri T, Specchia G, Mornos C, Rusinaru D, Cozma D, Ionac A, Petrescu L, Rotzak R, Rosenman Y, Patterson RD, Ratnatheepan S, Bogle RG, Goebel B, Gjesdal O, Kottke D, Otto S, Jung C, Edvardsen T, Figulla HR, Poerner TC, Otsuka T, Suzuki M, Yoshikawa H, Hashimoto G, Itou N, Ono T, Yamamoto M, Osaki T, Tsuchida T, Sugi K, Wolber T, Haegeli L, Huerlimann D, Brunckhorst C, Duru F, Wu ZM, Shu XH, Dong LL, Fan B, Ge JB, Greutmann M, Tobler D, Biaggi P, Mah M, Crean A, Oechslin EN, Silversides CK, Ivanovic B, Tadic MT, Simic DS, Giusca S, Jurcut R, Ghiorghiu I, Coman IM, Popescu BA, Amzulescu M, Ionescu R, Delcroix M, Voigt JU, Ginghina C, Piatkowski R, Kochanowski J, Scislo P, Grabowski M, Marchel M, Roik M, Kosior D, Opolski G, Maceira Gonzalez AM, Cosin-Sales J, Dalli E, Igual B, Monmeneu JV, Lopez-Lereu P, Estornell J, Ruvira J, Sotillo J, Stevanovic A, Toncev A, Dimkovic S, Dekleva M, Paunovic N, Toncev D, Sekularac N, Yildirimturk O, Helvacioglu FF, Tayyareci Y, Yurdakul S, Demiroglu ICC, Aytekin S, Pinedo Gago M, Amat Santos I, Revilla Orodea A, Lopez Diaz J, Arnold R, De La Fuente Galan L, Recio Platero A, Gomez Salvador I, Puerto Sanz A, San Roman Calvar JA, Yotti R, Bermejo J, Mombiela T, Benito Y, Sanchez PL, Solis J, Prieto R, Fernandez-Aviles F, Zilberszac R, Gabriel H, Graf S, Mundigler G, Maurer G, Rosenhek R, Zito C, Salvia J, Longordo C, Donato D, Alati E, Miceli M, Pardeo A, Arcidiaco S, Oreto G, Carerj S, Kamperidis V, Hadjimiltiades S, Sianos G, Anastasiadis K, Grosomanidis V, Efthimiadis G, Karvounis H, Parcharidis G, Styliadis IH, Yousry M, Rickenlund A, Petrini J, Gustafsson T, Liska J, Hamsten A, Eriksson P, Franco-Cereceda A, Eriksson MJ, Caidahl K, Mizia-Stec K, Pysz P, Jasinski M, Drzewiecka-Gerber A, Krejca M, Bochenek A, Wos S, Gasior Z, Trusz-Gluza M, Tendera M, Yildirimturk O, Helvacioglu FF, Tayyareci Y, Yurdakul S, Demiroglu ICC, Aytekin S, Niki K, Sugawara M, Takamisawa I, Watanabe H, Sumiyoshi T, Hosoda S, Ida T, Takanashi S, Olsen NT, Sogaard P, Jons C, Mogelvang R, Larsson HBW, Goetze JP, Nielsen OW, Fritz-Hansen T, Sayar N, Orhan AL, Erer HB, Eren M, Atmaca H, Yilmaz HY, Cakmak N, Altay S, Terzi S, Yesilcimen K, Garcia Orta R, Moreno E, Lopez M, Uribe I, Vidal M, Ruiz-Lopez MF, Gonzalez-Molina M, Oyonarte JM, Lopez S, Azpitarte J, Szymanski C, Levine RA, Zheng H, Handschumacher MD, Tawakol A, Hung J, Le Ven F, Etienne Y, Jobic Y, Frachon I, Castellant P, Fatemi M, Blanc JJ, Rusinaru D, Tribouilloy C, Grigioni F, Avierinos JF, Barbieri A, Buiciuc O, Enriquez-Sarano M, Said K, Farag AK, El-Ramly M, Rizk H, Iorio A, Pinamonti B, Bobbo M, Merlo M, Massa L, Faganello G, Di Lenarda A, Sinagra G, Margato R, Ribeiro H, Ferreira C, Matias A, Fontes P, Moreira JI, Milan A, Puglisi E, Magnino C, Fabbri A, Leone D, Vairo A, Crudo V, Iannaccone A, Milazzo V, Veglio F, Maroz-Vadalazhskaya N, Ostrovskiy I, Zito C, Imbalzano E, Saitta A, Oreto G, Cusma-Piccione M, Di Bella G, Nava R, Ferro M, Falanga G, Carerj S, Frigy A, Buzogany J, Szabados CS, Dan L, Carasca E, Ikonomidis I, Lekakis J, Tzortzis S, Kremastinos DT, Papadopoulos C, Paraskevaidis I, Triantafyllidi H, Trivilou P, Venetsanou K, Anastasiou-Nana M, Wierzbowska-Drabik K, Kurpesa M, Trzos E, Rechcinski T, Mozdzan M, Kasprzak JD, Kosmala W, Kotwica T, Przewlocka-Kosmala M, Mysiak A, Skultetyova D, Filipova S, Chnupa P, Mantziari L, Pechlivanidis G, Giannakoulas G, Dimitroula H, Karvounis H, Styliadis IH, Milan A, Puglisi E, Magnino C, Fabbri A, Leone D, Vairo A, Iannaccone A, Crudo V, Milazzo V, Veglio F, Tsai WC, Liu YW, Lin CC, Huang YY, Tsai LM, Park SM, Kim YH, Shin SM, Shim WJ, Gonzalez Mansilla A, Torres Macho J, Sanchez Sanchez V, Diez P, Delgado J, Borruel S, Saenz De La Calzada C, Pyxaras S, Valentincic M, Barbati G, Lo Giudice F, Perkan A, Magnani S, Merlo M, Pinamonti B, Sinagra G, Palecek T, Ambroz D, Jansa P, Lindner J, Vitovec M, Polacek P, Jiratova K, Linhart A, Baskurt M, Dogan GM, Abaci O, Kaya A, Kucukoglu S, Duszanska A, Kukulski T, Skoczylas I, Majsnerowska A, Nowowiejska-Wiewiora A, Streb W, Szulik M, Polonski L, Kalarus Z, Yerly PO, Prella M, Joly A, Nicod L, Aubert JD, Aebischer N, Dores H, Leal S, Rosario I, Correia MJ, Monge J, Grilo AM, Arroja I, Fonseca C, Aleixo A, Silva A, Perez-David E, Sanchez-Alegre M, Yotti R, Gomez Anta I, De La Torre J, Alarcon J, Garcia Robles JA, Lafuente J, Bermejo J, Fernandez-Aviles F, Garcia Alonso CJ, Vallejo Camazon N, Gonzalez Guardia A, Nunez R, Bosch Carabante C, Mateu L, Gual Capllonch F, Ferrer Sistach E, Lopez Ayerbe J, Bayes Genis A, Tomaszewski A, Kutarski A, Tomaszewski M, Bramos D, Kalantaridou A, Takos D, Skaltsiotis E, Trika C, Tsirikos N, Pamboukas C, Kottis G, Toumanidis S, Aggeli C, Felekos I, Roussakis G, Kazazaki C, Lampropoulos K, Lagoudakou S, Stergiou C, Pitsavos C, Stefanadis C, Kihara C, Murata K, Wada Y, Tanaka T, Uchida K, Okuda S, Susa T, Matsuzaki M, Shahgaldi K, Manouras A, Abrahamsson A, Gudmundsson P, Brodin L, Winter R, Knebel F, Schattke S, Sanad W, Schimke I, Schroeckh S, Brechtel L, Lock J, Makauskiene R, Baumann G, Borges AC, Moelmen-Hansen HE, Wisloff U, Aamot IL, Stoylen A, Ingul CB, Estensen ME, Beitnes JO, Grindheim G, Henriksen T, Aaberge L, Smiseth OA, Gullestad L, Aakhus S, Gargani L, Agoston G, Moggi Pignone A, Capati E, Badano L, Moreo A, Bombardieri S, Varga A, Sicari R, Picano E, Carrideo M, Faricelli S, Corazzini A, Ippedico R, Ruggieri B, Di Blasio A, D'angelo E, Di Baldassarre A, Ripari P, Gallina S, Kentrschynskyj A, Rickenlund A, Caidahl K, Hylander B, Jacobson S, Pagels A, Eriksson MJ, Dumitrescu SI, Tintoiu I, Greere V, Cristian G, Chiriac L, Pinte F, Droc I, Neagoe G, Stanciu S, Voicu VA, Kuch-Wocial A, Pruszczyk P, Szmigielski CA, Szulc M, Styczynski G, Sinski M, Kaczynska A, Ryabikov A, Malyutina S, Halcox J, Bobak M, Nikitin YU, Marmot M, Barbosa D, Kiss G, Orderud F, Amundsen B, Jasaityte R, Loeckx D, Claus P, Torp H, D'hooge J, Kuhl JT, Lonborg J, Fuchs A, Andersen M, Vejlstrup N, Engstrom T, Moller JE, Kofoed KF, Smith LA, Bhan A, Paul M, Monaghan MJ, Zaborska B, Stec S, Sikora-Frac M, Krynski T, Kulakowski P, Pushparajah K, Dashwood D, Barlow A, Nugent K, Miller O, Simpson J, Valeur N, Ersboll MK, Kjaergaard J, Greibe R, Risum N, Hassager C, Sogaard P, Kober L, Sahlen A, Manouras A, Shahgaldi K, Winter R, Brodin L, Popovic D, Nedeljkovic I, Petrovic M, Vujisic-Tesic B, Arandjelovic A, Stojiljkovic S, Stojiljkovic S, Jakovljevic B, Damjanovic S, Ostojic M, Agrios IA, Bramos DB, Skaltsiotis HS, Takos DT, Kaladaridis A, Vasiladiotis NV, Kottis GK, Antoniou AA, Pamboucas CP, Toumanidis STT, Locorotondo G, Porto I, Paraggio L, Fedele E, Barchetta S, De Caterina AR, Rebuzzi AG, Crea F, Galiuto L, Lipiec P, Szymczyk E, Michalski B, Wozniakowski B, Stefanczyk L, Rotkiewicz A, Shim A, Kasprzak JD, Vainer J, Habets J, Lousberg A, Pont De C, Waltenberger J, Farouk H, Heshmat H, Adel A, El Chilali K, Baghdady Y, Sorour K, Gustafsson U, Larsson M, Bjallmark A, Lindqvist P, A'roch R, Haney M, Waldenstrom A, Mladenovic Z, Tavciovski D, Mijailovic Z, Djordjevic - Dikic A, Obradovic S, Matunovic R, Jovic Z, Djuric P, Torp H, Aase S, Dalen H, Sarkola T, Redington AN, Keeley F, Bradley T, Jaeggi E, Sahlen H, Winter R, Brodin L, Sahlen A, Olsen NT, Risum N, Jons C, Mogelvang R, Valeur N, Fritz-Hansen T, Sogaard P. Poster session IV * Friday 10 December 2010, 14:00-18:00. European Journal of Echocardiography 2010. [DOI: 10.1093/ejechocard/jeq146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Gullo F, Mazzetti S, Maffezzoli A, Dossi E, Lecchi M, Amadeo A, Krajewski J, Wanke E. Orchestration of "presto" and "largo" synchrony in up-down activity of cortical networks. Front Neural Circuits 2010; 4:11. [PMID: 20461235 PMCID: PMC2866559 DOI: 10.3389/fncir.2010.00011] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2010] [Accepted: 03/21/2010] [Indexed: 01/09/2023] Open
Abstract
It has been demonstrated using single-cell and multiunit electrophysiology in layer III entorhinal cortex and disinhibited hippocampal CA3 slices that the balancing of the up-down activity is characterized by both GABAA and GABAB mechanisms. Here we report novel results obtained using multi-electrode array (60 electrodes) simultaneous recordings from reverberating postnatal neocortical networks containing 19.2 ± 1.4% GABAergic neurons, typical of intact tissue. We observed that in each spontaneous active-state the total number of spikes in identified clusters of excitatory and inhibitory neurons is almost equal, thus suggesting a balanced average activity. Interestingly, in the active-state, the early phase is sustained by only 10% of the total spikes and the firing rate follows a sigmoidal regenerative mode up to peak at 35 ms with the number of excitatory spikes greater than inhibitory, therefore indicating an early unbalance. Concentration-response pharmacology of up- and down-state lifetimes in clusters of excitatory (n = 1067) and inhibitory (n = 305) cells suggests that, besides the GABAA and GABAB mechanisms, others such as GAT-1-mediated uptake, Ih, INaP and IM ion channel activity, robustly govern both up- and down-activity. Some drugs resulted to affect up- and/or down-states with different IC50s, providing evidence that various mechanisms are involved. These results should reinforce not only the role of synchrony in CNS networks, but also the recognized analogies between the Hodgkin–Huxley action potential and the population bursts as basic mechanisms for originating membrane excitability and CNS network synchronization, respectively.
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Affiliation(s)
- Francesca Gullo
- Department of Biotechnologies and Biosciences, University of Milano-Bicocca Milan, Italy
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Vitellaro-Zuccarello L, Mazzetti S, Madaschi L, Bosisio P, Fontana E, Gorio A, De Biasi S. Chronic erythropoietin-mediated effects on the expression of astrocyte markers in a rat model of contusive spinal cord injury. Neuroscience 2007; 151:452-66. [PMID: 18065151 DOI: 10.1016/j.neuroscience.2007.11.004] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [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: 06/27/2007] [Revised: 11/02/2007] [Accepted: 11/06/2007] [Indexed: 12/11/2022]
Abstract
Using a standardized rat model of contusive spinal cord injury (SCI; [Gorio A, Gokmen N, Erbayraktar S, Yilmaz O, Madaschi L, Cichetti C, Di Giulio AM, Vardar E, Cerami A, Brines M (2002) Recombinant human erythropoietin counteracts secondary injury and markedly enhances neurological recovery from experimental spinal cord trauma. Proc Natl Acad Sci U S A 99:9450-9455]), we previously showed that the administration of recombinant human erythropoietin (rhEPO) improves both tissue sparing and locomotory outcome. In the present study, to better understand rhEPO-mediated effects on chronic astrocyte response to SCI in rat, we have used immunocytochemical methods combined with confocal and electron microscopy to investigate, 1 month after injury, the effects of a single rhEPO administration on the expression of a) aquaporin 4 (AQP4), the main astrocytic water channel implicated in edema development and resolution, and two molecules (dystrophin and syntrophin) involved in its membrane anchoring; b) glial fibrillary acidic protein (GFAP) and vimentin as markers of astrogliosis; c) chondroitin sulfate proteoglycans of the extracellular matrix which are upregulated after SCI and can inhibit axonal regeneration and influence neuronal and glial properties. Our results show that rhEPO administration after SCI modifies astrocytic response to injury by increasing AQP4 immunoreactivity in the spinal cord, but not in the brain, without apparent modifications of dystrophin and syntrophin distribution. Attenuation of astrogliosis, demonstrated by the semiquantitative analysis of GFAP labeling, was associated with a reduction of phosphacan/RPTP zeta/beta, whereas the levels of lecticans remained unchanged. Finally, the relative volume of a microvessel fraction was significantly increased, indicating a pro-angiogenetic or a vasodilatory effect of rhEPO. These changes were consistently associated with remarkable reduction of lesion size and with improvement in tissue preservation and locomotor recovery, confirming previous observations and underscoring the potentiality of rhEPO for the therapeutic management of SCI.
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Affiliation(s)
- L Vitellaro-Zuccarello
- Dipartimento di Scienze Biomolecolari e Biotecnologie, Università degli Studi di Milano, Via Celoria, 26 I-20133 Milano, Italy.
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Mazzetti S, Ortino B, Inverardi F, Frassoni C, Amadeo A. PSA-NCAM in the developing and mature thalamus. Brain Res Bull 2006; 71:578-86. [PMID: 17292800 DOI: 10.1016/j.brainresbull.2006.11.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2006] [Revised: 11/28/2006] [Accepted: 11/30/2006] [Indexed: 11/28/2022]
Abstract
The polysialylated form of the neural cell adhesion molecule (PSA-NCAM) is involved in several morphogenetic processes of the central nervous system. In the present study the expression of PSA-NCAM has been investigated in the rat thalamus during embryonic and postnatal development using light and electron microscopic immunocytochemical techniques. At all the examined ages, PSA-NCAM staining in the thalamus was mainly observed along neuronal plasmatic membranes and absent in astrocytes identified by labelling with cytoskeletal (vimentin and glial fibrillary acidic protein) and membrane (GABA transporter-3) markers. At embryonic day 14 the immunoreactivity was restricted to the dorsal thalamic mantle and to the region of reticular thalamic migration and subsequently it extended throughout the whole thalamic primordium. PSA-NCAM labelling remained intense and homogeneously distributed along perinatal period, but from P4 it began to decrease selectively, persisting throughout adulthood only in the reticular nucleus, ventral lateral geniculate nucleus and midline and intralaminar nuclei. The expression of this adhesion molecule differed in areas characterized by the presence of neurons containing distinct calcium binding proteins, as PSA-NCAM labelling was intense around calretinin-positive neurons, whereas it decreased in some calbindin-immunoreactive regions. These findings show evidence of a selective neuronal expression of PSA-NCAM in developing thalamus, supporting its suggested role in cell migration and synaptogenesis as it occurs in the cerebral cortex. In adulthood PSA-NCAM could instead be a marker of thalamic nuclei that retain a potential for synaptic plasticity.
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Affiliation(s)
- Samanta Mazzetti
- Dipartimento di Scienze Biomolecolari e Biotecnologie, Università degli Studi di Milano, Via Celoria 26, 20133 Milano, Italy.
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Vitellaro-Zuccarello L, Mazzetti S, Madaschi L, Bosisio P, Gorio A, De Biasi S. Erythropoietin-mediated preservation of the white matter in rat spinal cord injury. Neuroscience 2006; 144:865-77. [PMID: 17141961 DOI: 10.1016/j.neuroscience.2006.10.023] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.3] [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: 07/26/2006] [Revised: 10/12/2006] [Accepted: 10/12/2006] [Indexed: 12/21/2022]
Abstract
We investigated the effect of a single administration of recombinant human erythropoietin (rhEPO) on the preservation of the ventral white matter of rats at 4 weeks after contusive spinal cord injury (SCI), a time at which functional recovery is significantly improved in comparison to the controls [Gorio A, Necati Gokmen N, Erbayraktar S, Yilmaz O, Madaschi L, Cichetti C, Di Giulio AM, Enver Vardar E, Cerami A, Brines M (2002) Recombinant human erythropoietin counteracts secondary injury and markedly enhances neurological recovery from experimental spinal cord trauma. Proc Natl Acad Sci U S A 99:9450-9455; Gorio A, Madaschi L, Di Stefano B, Carelli S, Di Giulio AM, De Biasi S, Coleman T, Cerami A, Brines M (2005) Methylprednisolone neutralizes the beneficial effects of erythropoietin in experimental spinal cord injury. Proc Natl Acad Sci U S A 102:16379-16384]. Specifically, we examined, by morphological and cytochemical methods combined with light, confocal and electron microscopy, i) myelin preservation, ii) activation of adult oligodendrocyte progenitors (OPCs) identified for the expression of NG2 transmembrane proteoglycan, iii) changes in the amount of the chondroitin sulfate proteoglycans neurocan, versican and phosphacan and of their glycosaminoglycan component labeled with Wisteria floribunda lectin, and iv) ventral horn density of the serotonergic plexus as a marker of descending motor control axons. Injured rats received either saline or a single dose of rhEPO within 30 min after SCI. The results showed that the significant improvement of functional outcome observed in rhEPO-treated rats was associated with a better preservation of myelin in the ventral white matter. Moreover, the significant increase of both the number of NG2-positive OPCs and the labeling for Nogo-A, a marker of differentiated oligodendrocytes, suggested that rhEPO treatment could result in the generation of new myelinating oligodendrocytes. Sparing of fiber tracts in the ventral white matter was confirmed by the increased density of the serotonergic plexus around motor neurons. As for chondroitin sulfate proteoglycans, only phosphacan, increased in saline-treated rats, returned to normal levels in rhEPO group, probably reflecting a better maintenance of glial-axolemmal relationships along nerve fibers. In conclusion, this investigation expands previous studies supporting the pleiotropic neuroprotective effect of rhEPO on secondary degenerative response and its therapeutic potential for the treatment of SCI and confirms that the preservation of the ventral white matter, which contains descending motor pathways, may be critical for limiting functional deficit.
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Affiliation(s)
- L Vitellaro-Zuccarello
- Dipartimento di Scienze Biomolecolari e Biotecnologie, Università degli Studi di Milano, Via Celoria 26, I-20133 Milano, Italy.
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Vitellaro-Zuccarello L, Bosisio P, Mazzetti S, Monti C, De Biasi S. Differential expression of several molecules of the extracellular matrix in functionally and developmentally distinct regions of rat spinal cord. Cell Tissue Res 2006; 327:433-47. [PMID: 17036229 DOI: 10.1007/s00441-006-0289-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [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: 01/25/2006] [Accepted: 06/16/2006] [Indexed: 12/22/2022]
Abstract
We have examined the regional distribution of several chondroitin sulfate proteoglycans (neurocan, brevican, versican, aggrecan, phosphacan), of their glycosaminoglycan moieties, and of tenascin-R in the spinal cord of adult rat. The relationships of these molecules with glial and neuronal populations, identified with appropriate markers, were investigated by using multiple fluorescence labeling combined with confocal microscopy. The results showed that the distribution of the examined molecules was similar at all spinal cord levels but displayed area-specific differences along the dorso-ventral axis, delimiting functionally and developmentally distinct areas. In the gray matter, laminae I and II lacked perineuronal nets (PNNs) of extracellular matrix and contained low levels of chondroitin sulfate glycosaminoglycans (CS-GAGs), brevican, and tenascin-R, possibly favoring the maintenance of local neuroplastic properties. Conversely, CS-GAGs, brevican, and phosphacan were abundant, with numerous thick PNNs, in laminae III-VIII and X. Motor neurons (lamina IX) were surrounded by PNNs that contained all molecules investigated but displayed various amounts of CS-GAGs. Double-labeling experiments showed that the presence of PNNs could not be unequivocally related to specific classes of neurons, such as motor neurons or interneurons identified by their expression of calcium-binding proteins (parvalbumin, calbindin, calretinin). However, a good correlation was found between PNNs rich in CS-GAGs and the neuronal expression of the Kv3.1b subunit of the potassium channel, a marker of fast-firing neurons. This observation confirms the correlation between the electrophysiological properties of these neurons and the specific composition of their microenvironment.
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Affiliation(s)
- Laura Vitellaro-Zuccarello
- Dip. Scienze Biomolecolari e Biotecnologie, Università degli Studi di Milano, Via Celoria 26, 20133 Milan, Italy.
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Librizzi L, Mazzetti S, Pastori C, Frigerio S, Salmaggi A, Buccellati C, Di Gennaro A, Folco G, Vitellaro-Zuccarello L, de Curtis M. Activation of cerebral endothelium is required for mononuclear cell recruitment in a novel in vitro model of brain inflammation. Neuroscience 2006; 137:1211-9. [PMID: 16359809 DOI: 10.1016/j.neuroscience.2005.10.041] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [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: 07/14/2005] [Revised: 10/11/2005] [Accepted: 10/14/2005] [Indexed: 01/30/2023]
Abstract
Brain inflammation is a common event in the pathogenesis of several neurological diseases. It is unknown whether leukocyte/endothelium interactions are sufficient to promote homing of blood-borne cells into the brain compartment. The role of mononuclear cells and endothelium was analyzed in a new experimental model, the isolated guinea-pig brain maintained in vitro by arterial perfusion. This preparation allows one to investigate early steps of brain inflammation that are impracticable in vivo. We demonstrate by confocal microscopy analysis that in vitro co-perfusion of pro-inflammatory agents and pre-activated fluorescent mononuclear cells induced endothelial expression of selectins and intracellular adhesion molecule-1 in correspondence of arrested mononuclear cells, and correlates with a moderate increase in blood-brain barrier permeability. Separate perfusion of pro-inflammatory agents and mononuclear cells induced neither mononuclear cell adhesion nor adhesion molecule expression. We demonstrate that co-activation of mononuclear cells and cerebral endothelium is an essential requirement for cell arrest and adhesion in the early stages of experimental cerebral inflammation.
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Affiliation(s)
- L Librizzi
- Dipartimento di Neurofisiologia Sperimentale, Istituto Nazionale Neurologico, Via Celoria, 11 20133 Milano, Italy
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Balducci D, Mazzetti S, Morandi O, Tonni M, Lancini G, Becchetti A, Pancaldi R, Vittoria A. Saphenectomy: from day-surgery to the outpatient's department. Phlebology 2005. [DOI: 10.1258/0268355054985785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Gallagher P, Trappe S, Harber M, Creer A, Mazzetti S, Trappe T, Alkner B, Tesch P. Effects of 84-days of bedrest and resistance training on single muscle fibre myosin heavy chain distribution in human vastus lateralis and soleus muscles. ACTA ACUST UNITED AC 2005; 185:61-9. [PMID: 16128698 DOI: 10.1111/j.1365-201x.2005.01457.x] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.5] [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: 11/29/2022]
Abstract
AIM This investigation determined the effects of 84 days of bedrest on the composition of myosin heavy chain (MHC) in single skeletal muscle fibres with and without a resistance-training countermeasure programme. METHODS Muscle biopsies were obtained from the m. vastus lateralis (VL) and m. soleus (SOL) before and after 84 days of bedrest. While control (BR) subjects (VL n = 9; SOL n = 3) refrained from exercise, BRE subjects (VL n = 8; SOL n = 3) performed knee extensor and plantar flexor resistance exercise every third day. Approximately 110 fibres per sample were analysed for MHC composition using SDS-PAGE. RESULTS BR-VL had 16 and 14% decreases (P < 0.05) in MHC I and IIa fibres, respectively. There were 10% increases (P < 0.05) in MHC I/IIa, IIa/IIx, I/IIa/IIx, and a approximately 30% increase (P < 0.05) in total hybrid fibres. BRE-VL showed a 15% reduction (P < 0.05) in MHC I fibres, no change in MHC IIa fibres, and a 13% increase (P < 0.05) in total hybrids. BR-SOL had a 19% decrease (P < 0.05) in MHC I fibres with a 22% increase in total hybrids. BRE-SOL showed no change in MHC composition across all fibre types. CONCLUSION These data suggest that the exercise countermeasures programme prevented MHC shifts in the SOL and mitigated MHC shifts in the VL. Furthermore, in the VL it appears that the resistance training programme employed in this investigation during bedrest, emphasized the use of MHC IIa phenotype muscle fibres.
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Affiliation(s)
- P Gallagher
- Human Performance Laboratory, Ball State University, Muncie, IN 47306, USA
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Vitellaro-Zuccarello L, Mazzetti S, Bosisio P, Monti C, De Biasi S. Distribution of Aquaporin 4 in rodent spinal cord: relationship with astrocyte markers and chondroitin sulfate proteoglycans. Glia 2005; 51:148-59. [PMID: 15789430 DOI: 10.1002/glia.20196] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [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: 12/15/2022]
Abstract
Water balance between cells and extracellular compartments is essential for proper functioning of the central nervous system, as demonstrated by its perturbations in pathological conditions. Aquaporin 4 (AQP4) is the predominant water channel in brain and spinal cord, where it is present mainly on astrocytic endfeet contacting vessels. A role in water homeostasis control has been proposed also for the extracellular matrix, that in brain consists mainly of chondroitin sulfate proteoglycans (CSPGs). Using cytochemical and immunocytochemical techniques, we investigated their distribution in rodent spinal cord, to better understand the role of these two classes of molecules. The results show that in spinal gray matter AQP4 labeling is intense in all perivascular profiles and (1) displays a marked dorsoventral gradient in the neuropil; and (2) coexists extensively with glial glutamate transporter-1 (GLT-1) but scarcely with glial fibrillary acidic protein (GFAP). In white matter the overlap between AQP4, GLT-1, and GFAP is almost complete. Ultrastructural examination shows that AQP4-labeled astrocytic processes surround blood vessels, neuronal perikarya and processes, and both asymmetric and symmetric synapses, indicating that the protein may be involved in the regulation of water fluxes around both inhibitory and excitatory synapses. CSPGs, visualized by labeling with Wisteria floribunda agglutinin, show a distribution complementary to that of AQP4, being absent or weekly expressed in AQP4-enriched areas. These findings suggest that different mechanisms may contribute to the regulation of water homeostasis in different spinal cord regions.
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Mazzetti S, Frigerio S, Gelati M, Salmaggi A, Vitellaro-Zuccarello L. Lycopersicon esculentum lectin: an effective and versatile endothelial marker of normal and tumoral blood vessels in the central nervous system. Eur J Histochem 2005; 48:423-8. [PMID: 15718209 DOI: 10.4081/916] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The binding of Lycopersicon esculentum lectin (LEA) to the vascular endothelium was studied in the central nervous system of rat, mouse and guinea pig at different developmental ages, and in a gliosarcoma model. Our observations showed that LEA consistently stained the entire vascular tree in the spinal cord and in the brain of all animal species at all developmental ages investigated. In the tumor model, the staining of the vascular network was very reproducible, enabled an easy identification of vascular profiles and displayed a higher efficiency when compared to two other commonly used vascular marker (EHS laminin and PECAM-1). Moreover, our results showed that LEA staining was comparable in both vibratome and paraffin sections and could be easily combined with other markers in double labeling experiments. These observations indicate that LEA staining may represent an effective and versatile endothelial marker for the study of the vasculature of the central nervous system in different animal species and experimental conditions.
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Affiliation(s)
- S Mazzetti
- Dipartimento di Scienze Biomolecolari e Biotecnologie, Università degli Studi di Milano, Italy
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Abstract
Isolated organ preparations represent valuable models for biomedical research, provided that the functional and morphological integrity of vascular and parenchymal compartments is preserved. In this investigation, we have studied the molecular organization of the cerebral microvessels in the isolated guinea-pig brain maintained in vitro by arterial perfusion, a preparation previously proposed as a model of blood-brain barrier (BBB). Using lectin cytochemistry and immunohistochemistry, we examined the microvasculature of the cerebral cortex after 5 h in vitro to assess: (a) the structure of the endothelial glycocalyx at microscopical and ultrastructural level; (b) the distribution of the junctional molecules occludin, ZO-1, PECAM-1 and vinculin; (c) the distribution of basal lamina molecules, such as collagen type IV, laminin and heparan sulfate proteoglycan. All these components of microvessel wall have been previously shown to be vulnerable to ischemic conditions and their organization could be altered in consequence of the transient hypoxia associated with the brain isolation procedure. Our observations demonstrate that the distribution pattern of the molecules considered (i) is comparable to that shown in the cerebral microvasculature of other mammals and (ii) is similar in brains maintained in vitro and in control brains perfused in situ with fixative. The complex of our observation indicates that the molecular organization of the cerebral microvessels is preserved in isolated guinea-pig brain, thus indicating that these preparations can be used to study the cerebrovascular structure and blood-brain barrier function in a variety of experimental conditions.
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Affiliation(s)
- Samanta Mazzetti
- Dipartimento di Scienze Biomolecolari e Biotecnologie, Università degli Studi di Milano, via Celoria 26, 20133 Milan, Italy
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Parisi A, Pasquale R, Lucchini R, Farinacci F, Mazzetti S, Guerci L. Tace: Treatment of Unresecable Hcc. Tumori 2002. [DOI: 10.1177/030089160208800462] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- A Parisi
- Unità del Fegato, Azienda Ospedaliera S Maria, Terni, Italy
| | - R Pasquale
- Unità del Fegato, Azienda Ospedaliera S Maria, Terni, Italy
| | - R Lucchini
- Unità del Fegato, Azienda Ospedaliera S Maria, Terni, Italy
| | - F Farinacci
- Unità del Fegato, Azienda Ospedaliera S Maria, Terni, Italy
| | - S Mazzetti
- Unità del Fegato, Azienda Ospedaliera S Maria, Terni, Italy
| | - L Guerci
- Unità del Fegato, Azienda Ospedaliera S Maria, Terni, Italy
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47
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Lippa M, Tonni MP, Pancaldi R, Balducci D, Morandi O, Mazzetti S, Diana DR, Beschi M, Bruni GC. [Conservative treatment using mesalazine in ischemic colitis]. MINERVA GASTROENTERO 1997; 43:163-5. [PMID: 16501487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The authors propose the conservative treatment of ischemic colitis using slow-release mesalazine and enema. The excellent tolerability of the treatment and the good level of therapeutic efficacy was confirmed in 13 cases treated without signs of recurrence of disease.
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Affiliation(s)
- M Lippa
- USSL 18, Presidio Ospedaliero di Montichiari, Brescia
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48
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Balducci D, Postiglione V, Pancaldi R, Lippa M, Tonni MP, Morandi O, Mazzetti S, Beschi M, Diana DR, Vergallo A, Bruni GC. [Prosthetic repair of inguinal and crural hernias]. MINERVA CHIR 1997; 52:1069-75. [PMID: 9432581] [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: 02/05/2023]
Abstract
335 inguino-femoral hernias were repaired with polypropylene mesh from December 1991 through December 1995. Eleven patients underwent mesh reinforced Bassini, 167 modified Lichtenstein's technique and 108 Trabucco's repair. Forty-three patients were treated under regional anesthesia. Bilateral hernia was diagnosed in 33 patients and in 20 out of 33 the surgical procedure was entirely performed under regional anesthesia. Early complications referred were 32 scrotal hematomas which spontaneously healed. Two patients showed a recidive hernia and were retreated with and additional mesh; plug rejection (early experience) was referred in one patient who was reoperated on employing a mesh. The indications for the more suitable technique were directly deducted from Nyhus' hernia classification. The authors finally point out the: 1) importance of regional inguinal anesthesia; 2) correct cutting and application of the mesh in the inguinal canal; 3) internal inguinal ring repair; 4) bilateral hernia repair under regional anesthesia.
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Affiliation(s)
- D Balducci
- Divisione di Chirurgia Generale, Ospedale Civile di Montichiari, Brescia
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49
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Pouchè A, Biasca F, Piccinelli A, Mazzetti S, Pinelli D, Giulini SM, Tiberio G, Ascari E. [Intra- and postoperative changes in blood viscosity]. Ann Ital Chir 1991; 62:133-8; discussion 138-9. [PMID: 1755591] [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: 12/28/2022]
Abstract
Blood and plasma viscosity has been controlled in a group of patients undergone to aorto-iliac reconstruction and in a group of control after thyroidectomy, cholecystectomy, and hernioplasty. The hemodilution induced by intraoperative infusion in the vascular reconstruction produced an important decrease of hematic and plasmatic viscosity which lasted for several days after the operation. Removing the hemodilution effect by a mathematical correction of the viscosity measured values to a standard haematocrit, it has demonstrated as surgical operation, apart from its entity, promoted an increase of the viscosity which persisted long in the postoperative course. For what it concerns the risk of postoperative thrombosis from one side protective effect of hemodilution is confirmed, from the other, in absence of the hemodilution, it would be useful to continue the antithrombotic prophylaxis longer the perioperative time as usual.
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Affiliation(s)
- A Pouchè
- Clinica Chirurgica dell'Università degli Studi di Brescia
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