77 results on '"Panzeri C"'
Search Results
2. Poligoni a tutto tondo. Didattica della geometria nella scuola del primo ciclo
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Montagnoli, Laura, Dal Fabbro, M., Crespi, S., and Panzeri, C.
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Geometria ,Didattica ,Rappresentazione ,Gioco ,Settore MAT/04 - MATEMATICHE COMPLEMENTARI - Published
- 2020
3. A Rock Physics Workflow to Simulate Matrix Mineralogy Effects on AVO Models
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Panzeri, C., primary, Ciurlo, B., additional, and Finis, F. De, additional
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- 2020
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4. First case of compound heterozygosity in ALS2 gene in infantile-onset ascending spastic paralysis with bulbar involvement
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Sztriha, L, Panzeri, C, Kálmánchey, R, Szabó, N, Endreffy, E, Túri, S, Baschirotto, C, Bresolin, N, Vekerdy, Z, and Bassi, M T
- Published
- 2008
5. The role of disodium pamidronate in the management of bone pain due to malignancy
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Groff, L, Zecca, E, De Conno, F, Brunelli, C, Boffi, R, Panzeri, C, Cazzaniga, M, and Ripamonti, C
- Published
- 2001
6. Approccio genetico alla diagnosi della malattia parodontale: ruolo dell’igienista
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Baldini, A, Visconti, S, Panzeri, C, BALDINI, ALBERTO, Panzeri, C., Baldini, A, Visconti, S, Panzeri, C, BALDINI, ALBERTO, and Panzeri, C.
- Published
- 2010
7. Approccio genetico alla diagnosi della malattia parodontale: ruolo dell’igienista
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BALDINI, ALBERTO, Visconti, S, Panzeri, C., Baldini, A, Visconti, S, and Panzeri, C
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periodontal disease ,MED/28 - MALATTIE ODONTOSTOMATOLOGICHE - Published
- 2010
8. Un metodo di indagine sulla safety culture per la sicurezza dei servizi sanitari in Italia
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Brusoni, Manuela, Deriu, P. L., Panzeri, C., and Trinchero, Elisabetta
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ITALIA ,SSN ,INDAGINE ,SAFETY CULTURE ,SERVIZI SANITARI - Published
- 2009
9. Poco...Molto...Moltissimo...Per una storia del clima
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Capotondi L. and Giorgioni M. e Panzeri C
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paloeclima ,tempo gerologico ,geologia - Published
- 2008
10. Eight novel mutations in SPG4 gene in a large sample of patients with hereditary spastic paraplegia
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Martinuzzi, A., Crippa, F., Panzeri, C., Arnoldi, A., Redaelli, F., Tonelli, A., Baschirotto, C., Mostacciuolo, Ml, Daga, A., D Angelo, Mg, Profice, P., Comi, G., Galbiati, S., Lamperti, C., Pandolfo, M., Meola, G., Musumeci, O., Toscano, A., Trevisan, C., Bresolin, N., and Maria Teresa Bassi
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SPG4 gene ,Settore MED/26 - Neurologia ,hereditary spastic paraplegia - Published
- 2006
11. Molecular and clinic characterization of a large cohort of Italian patients with Hereditary Spastic Paraplegia (HSP)
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Martinuzzi, A, Rossetto, Mg, Crippa, F., Panzeri, C., Musumeci, Olimpia, Vazza, G., Toscano, Antonio, Comi, Gp, G. D., ANGELO ML MOSTACCIOLO, Trevisan, C., Siciliano, G., Giovanni, M., Profice, P., Daga, A., Pandolfo, M., and BRESOLIN MT BASSI, N.
- Published
- 2006
12. Nitric oxide inhibition of Drp1-mediated mitochondrial fission is critical for myogenic differentiation
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De Palma, C, Falcone, S, Pisoni, S, Cipolat, S, Panzeri, C, Pambianco, S, Pisconti, A, Allevi, R, Bassi, M, Cossu, G, Pozzan, T, Moncada, S, Scorrano, L, Brunelli, S, Clementi, E, Bassi, MT, BRUNELLI, SILVIA, Clementi, E., De Palma, C, Falcone, S, Pisoni, S, Cipolat, S, Panzeri, C, Pambianco, S, Pisconti, A, Allevi, R, Bassi, M, Cossu, G, Pozzan, T, Moncada, S, Scorrano, L, Brunelli, S, Clementi, E, Bassi, MT, BRUNELLI, SILVIA, and Clementi, E.
- Abstract
During myogenic differentiation the short mitochondria of myoblasts change into the extensively elongated network observed in myotubes. The functional relevance and the molecular mechanisms driving the formation of this mitochondrial network are unknown. We now show that mitochondrial elongation is required for myogenesis to occur and that this event depends on the cellular generation of nitric oxide (NO). Inhibition of NO synthesis in myogenic precursor cells leads to inhibition of mitochondrial elongation and of myogenic differentiation. This is due to the enhanced activity, translocation and docking of the pro-fission GTPase dynamin-related protein-1 (Drp1) to mitochondria, leading also to a latent mitochondrial dysfunction that increased sensitivity to apoptotic stimuli. These effects of NO inhibition were not observed in myogenic precursor cells containing a dominant-negative form of Drp1. Both NO-dependent repression of Drp1 action and maintenance of mitochondrial integrity and function were mediated through the soluble guanylate cyclase. These data uncover a novel level of regulation of differentiation linking mitochondrial morphology and function to myogenic differentiation. © 2010 Macmillan Publishers Limited All rights reserved.
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- 2010
13. A novel mutation in KCNQ2 associated with BFNC, drug resistant epilepsy, and mental retardation.
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Borgatti R, Zucca C, Cavallini A, Ferrario M, Panzeri C, Castaldo P, Soldovieri MV, Baschirotto C, Bresolin N, Bernardina BD, Taglialatela M, Bassi MT, Borgatti, R, Zucca, C, Cavallini, A, Ferrario, M, Panzeri, C, Castaldo, P, Soldovieri, M V, and Baschirotto, C
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- 2004
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14. Relacao entre serapilheira acumulada, caracteristicas fitossociologicas e pedologicas em quatro capoeiras de bracatinga (Mimosa scabrella Bentham) na regiao metropolitana de Curitiba-PR
- Author
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ZILLER, S. R., RIBASKI, J., NEVES, E. J. M., WISNIEWSKI, C., CURCIO, G. R., RACHWAL, M. F. G., MARTINS, C. M., SOUZA, S. L. de, PANZERI, C. G., MASCHIO, W., and JORGE RIBASKI, CPATSA.
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Vegetação ,forestry ,Floresta ,Bracatinga ,vegetation ,Curitiba ,Mimosa Scabrella ,Parana ,Serapilheira ,ecosystems ,plant ecology ,Fitossociologia ,Ecossistema florestal ,Brazil - Abstract
O objetivo deste trabalho foi quantificar a serapilheira acumulada sobre o solo e os macronutrientes nela armazenados, relacionando-os às características fitossociológicas do sub-bosque de quatro capoeiras de bracatinga e características de solos derivados de diferentes litologias. Made available in DSpace on 2018-08-11T00:39:22Z (GMT). No. of bitstreams: 1 ArquivosdeBiologiaeTecnologiav.39n.4p.9119211996.pdf: 6900457 bytes, checksum: 2319bf536078653372191c7f36423ab8 (MD5) Previous issue date: 2000-03-31
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- 1996
15. Identification of Taxine Derivatives in Biological Fluids from a Patient after Attempted Suicide by Ingestion of Yew (Taxus baccata) Leaves
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Persico, A., primary, Bacis, G., additional, Uberti, F., additional, Panzeri, C., additional, Di Lorenzo, C., additional, Moro, E., additional, and Restani, P., additional
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- 2011
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16. Nitric oxide inhibition of Drp1-mediated mitochondrial fission is critical for myogenic differentiation
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De Palma, C, primary, Falcone, S, additional, Pisoni, S, additional, Cipolat, S, additional, Panzeri, C, additional, Pambianco, S, additional, Pisconti, A, additional, Allevi, R, additional, Bassi, M T, additional, Cossu, G, additional, Pozzan, T, additional, Moncada, S, additional, Scorrano, L, additional, Brunelli, S, additional, and Clementi, E, additional
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- 2010
- Full Text
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17. Autoantibodies to amphiphysin I and amphiphysin II in a patient with sensory-motor neuropathy
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Perego, L, Previtali, S, Nemni, R, Longhi, R, Carandente, O, Saibene, A, Sciolla, R, Villa, A, Gai, P, Panzeri, C, Dell'Antonio, G, Quattrini, A, Folli, F, Previtali, SC, Folli, F., VILLA, ANTONELLO, Perego, L, Previtali, S, Nemni, R, Longhi, R, Carandente, O, Saibene, A, Sciolla, R, Villa, A, Gai, P, Panzeri, C, Dell'Antonio, G, Quattrini, A, Folli, F, Previtali, SC, Folli, F., and VILLA, ANTONELLO
- Abstract
A proportion of patients with peripheral neuropathies has circulating autoantibodies directed against neural antigens. In some cases, autoantibodies may play a pathogenic role. We studied a patient with a progressive sensory-motor axonal neuropathy of unknown etiology, looking for circulating autoantibodies against neural antigens and we showed that the patient's serum contained anti-amphiphysin I (AMP I) and amphiphysin II (AMP II) autoantibodies. A sural nerve biopsy revealed an axonal neuropathy. Indirect immunofluorescence experiments with the patient's serum showed a staining of rat axons due to alpha-AMP I autoantibodies and a specific labelling of cytoplasm and Schmidt-Lanterman incisures of Schwann cells due to alpha-AMP II autoantibodies. In conclusion we identified a patient affected by a sensory-motor neuropathy with autoantibodies against both AMP I and AMP II.
- Published
- 2002
18. The first ALS2 missense mutation associated with JPLS reveals new aspects of alsin biological function
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Panzeri, C., primary
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- 2006
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19. Junctional adhesion molecule, a novel member of the immunoglobulin superfamily that distributes at intercellular junctions and modulates monocyte transmigration
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Martìn Padura, I, Lostaglio, S, Schneemann, M, Williams, L, Romano, M, Fruscella, P, Panzeri, C, Stoppacciaro, A, Ruco, L, Villa, A, Simmons, D, Dejana, E, Dejana, E., VILLA, ANTONELLO, Martìn Padura, I, Lostaglio, S, Schneemann, M, Williams, L, Romano, M, Fruscella, P, Panzeri, C, Stoppacciaro, A, Ruco, L, Villa, A, Simmons, D, Dejana, E, Dejana, E., and VILLA, ANTONELLO
- Abstract
Tight junctions are the most apical components of endothelial and epithelial intercellular cleft. In the endothelium these structures play an important role in the control of paracellular permeability to circulating cells and solutes. The only known integral membrane protein localized at sites of membrane-membrane interaction of tight junctions is occludin, which is linked inside the cells to a complex network of cytoskeletal and signaling proteins. We report here the identification of a novel protein (junctional adhesion molecule [JAM]) that is selectively concentrated at intercellular junctions of endothelial and epithelial cells of different origins. Confocal and immunoelectron microscopy shows that JAM codistributes with tight junction components at the apical region of the intercellular cleft. A cDNA clone encoding JAM defines a novel immunoglobulin gene superfamily member that consists of two V-type Ig domains. An mAb directed to JAM (BV11) was found to inhibit spontaneous and chemokine-induced monocyte transmigration through an endothelial cell monolayer in vitro. Systemic treatment of mice with BV11 mAb blocked monocyte infiltration upon chemokine administration in subcutaneous air pouches. Thus, JAM is a new component of endothelial and epithelial junctions that play a role in regulating monocyte transmigration.
- Published
- 1998
20. Autoantibodies to Amphiphysin I and Amphiphysin II in a Patient with Sensory-Motor Neuropathy
- Author
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Perego, L., primary, Previtali, S.C., additional, Nemni, R., additional, Longhi, R., additional, Carandente, O., additional, Saibene, A., additional, Sciolla, R., additional, Villa, A., additional, Gai, P., additional, Panzeri, C., additional, Dell’Antonio, G., additional, Quattrini, A., additional, and Folli, F., additional
- Published
- 2002
- Full Text
- View/download PDF
21. P-selectin is expressed on the oolemma of human and hamster oocytes following sperm adhesion and is also detected on the equatorial region of acrosome-reacted human spermatozoa
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Fusi, F, Montesano, M, Bernocchi, N, Panzeri, C, Ferrara, F, Villa, A, Bronson, R, Fusi, FM, VILLA, ANTONELLO, Bronson, RA, Fusi, F, Montesano, M, Bernocchi, N, Panzeri, C, Ferrara, F, Villa, A, Bronson, R, Fusi, FM, VILLA, ANTONELLO, and Bronson, RA
- Abstract
Selectins are a family of adhesive molecules, involved in the interactions between leukocytes and endothelium and in platelet adhesion. P-selectin, one of the members of this family, is stored in alpha-granules and dense granules of platelets as well as in Weibel-Palade bodies of endothelial cells, and it is rapidly redistributed to the cell surface after activation. It recognizes carbohydrate structures as ligands, in particular sialyl-Lewis(x), which is part of the CD15 antigen. In this work we studied P-selectin expression on gametes. While zona-free human and hamster oocytes did not react with a monoclonal antibody directed against P-selectin, oocytes from both species displayed a reactivity with this antibody following their contact with human spermatozoa, as demonstrated both by covasphere binding and indirect immunofluorescence. Artificial activation of zona-intact human oocytes by means of the calcium lonophore A23187 induced the expression on the oolemma of a moiety reacting with anti-P-selectin antibody as well. P-selectin also appeared to be expressed on the sperm surface following the acrosome reaction, as demonstrated by a flow cytometric study of reactivity of spermatozoa with the anti-P-selectin antibody, using the expression of CD46 as a marker of the acrosome reaction. The localization of the P-selectin moiety on the equatorial region of the plasma membrane of acrosome reacted spermatozoa was confirmed by transmission electron microscopy using immunogold labelling. We suggest that P-selectin might be involved in gamete interactions
- Published
- 1996
22. Transient overexpression of human H- and L-ferritin chains in COS cells
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CORSI, Barbara, primary, PERRONE, Federica, additional, BOURGEOIS, Monique, additional, BEAUMONT, Carole, additional, PANZERI, C. Maria, additional, COZZI, Anna, additional, SANGREGORIO, Romina, additional, SANTAMBROGIO, Paolo, additional, ALBERTINI, Alberto, additional, AROSIO, Paolo, additional, and LEVI, Sonia, additional
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- 1998
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23. Integrins and adhesion molecules: P-selectin is expressed on the oolemma of human and hamster oocytes following sperm adhesion and is also detected on the equatorial region of acrosome-reacted human spermatozoa
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Fusi, F.M., primary, Montesano, M., additional, Bernocchi, N., additional, Panzeri, C., additional, Ferrara, F., additional, Villa, A., additional, and Bronson, R.A., additional
- Published
- 1996
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24. Palliative care in a national cancer center: results in 1987 vs. 1993 vs. 2000.
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De Conno F, Panzeri C, Brunelli C, Saita L, Ripamonti C, De Conno, Franco, Panzeri, Cristina, Brunelli, Cinzia, Saita, Luigi, and Ripamonti, Carla
- Abstract
In the last few years, palliative care for advanced and terminal cancer patients has undergone considerable evolution. We determined the characteristics of patients admitted to the 4-bed Palliative Care Unit (PCU) of the National Cancer Institute (NCI) of Milan in 1987, 1993 and 2000 to evaluate how our diagnostic and therapeutic approaches have changed over the years. We reviewed the charts of every patient admitted to the PCU in 1987, 1993, and the first ten months of 2000. We recorded demographic data; the primary tumor sites; the main reason for admission; the types of therapies administered (oncologic, analgesic, surgical, neurosurgical analgesic procedures, and supportive therapy); the type and number of cardiological, radiological and endoscopic examinations, as well as specialist consultations; the duration of stay and eventual death on the Unit. There were no significant differences regarding gender, age, primary tumor site and death in hospital of the patients admitted during these years. The time spent in hospital increased over time (P = 0.006). A significant increase was observed in the percentage of patients admitted for supportive therapy (P < 0.001) and investigation concerning the stage of the disease (P < 0.001). There was a significant decrease in admission for invasive analgesic procedures (P < 0.001), as well as for pain diagnosis and/or uncontrolled pain. Uncontrolled pain remained the most frequent reason for admission. Over the years, during hospitalization, 7% to 12% of the patients underwent radiotherapy,1% to 9% had computerized tomography, and 4% to 8% had palliative surgery. More than 50% of the patients received intravenous hydration; a few patients received hypodermoclysis in 1987. Over time, there was a significant increase in "as needed" administration of nonsteroidal anti-inflammatory drugs and a significant reduction in their regular administration (from 24% in 1987 and 1993 to 3% in 2000) (P < 0.001). The use of codeine, tramadol and methadone increased (P < 0.001), whereas the use of oral morphine, buprenorphine and oxycodone decreased in 2000 (P < 0.001). There was a reduction in the use of antidepressants (no significant constant trend) and a significant increase in the use of anticonvulsants, laxatives and pamidronate (P < 0.001). Regularly administered hypnotics decreased in 1993 and increased in 2000 (P < 0.001). Over these years, no significant differences were found in the routes of opioid administration, in route switching and in the mean maximum oral opioid dose (ranging from 108 to 126 mg/day). The percentage of patients undergoing percutaneous cordotomy significantly decreased in 1993 and 2000 (P < 0.001). Over time, there was an increase in requests for specialist consultations, which was significant for neurological, cardiological and oncological consults (P < 0.001). Although the characteristics of the patients admitted to the PCU did not change over these years, there have been significant modifications in our therapeutic approaches, above all in the use of supportive therapy, adjuvant drugs, opioids and neurosurgical invasive procedures. Moreover, a major collaborative interaction with other specialists of the NCI took place with the aim to tailor treatment for each single patient. [ABSTRACT FROM AUTHOR]
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- 2003
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25. Modifiche del trattamento tributario degli interessi sui titoli pubblici e redditività delle aziende di credito
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DI MAJO, Antonio, PANZERI C, PISANTI C, ROSSI P., AA.VV., DI MAJO, Antonio, Panzeri, C, Pisanti, C, and Rossi, P.
- Published
- 1983
26. Identification of a novel cadherin (vascular endothelial cadherin-2) located at intercellular junctions in endothelial cells.
- Author
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Telo', P, Breviario, F, Huber, P, Panzeri, C, and Dejana, E
- Abstract
Endothelial cells express two major cadherins, VE- and N-cadherins, but only the former consistently participates in adherens junction organization. In heart microvascular endothelial cells, we identified a new member of the cadherin superfamily using polymerase chain reaction. The entire putative coding sequence was determined. Similarly to protocadherins, while the extracellular domain presented homology with other members of the cadherin superfamily, the intracellular region was unrelated either to cadherins or to any other known protein. We propose for this new protein the name of vascular endothelial cadherin-2. By Northern blot analysis, the mRNA was present only in cultured endothelial cell lines but not in other cell types such as NIH 3T3, Chinese hamster ovary, or L cells. In addition, mRNA was particularly abundant in highly vascularized organs such as lung or kidney. In endothelial cells and transfectants, this cadherin was unable to bind catenins and presented a weak association with the cytoskeleton. This new molecule shares some functional properties with VE-cadherin and other members of the cadherin family. In Chinese hamster ovary transfectants it promoted homotypic Ca2+ dependent aggregation and adhesion and clustered at intercellular junctions. However, in contrast to VE-cadherin, it did not modify paracellular permeability, cell migration, and density-dependent cell growth. These observations suggest that different cadherins may promote homophilic cell-to-cell adhesion but that the functional consequences of this interaction depend on their binding to specific intracellular signaling/cytoskeletal proteins.
- Published
- 1998
27. Normal P0 glycoprotein rescues pathological effects of mutant P0 in a transgenic mouse model of CMT1B
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Stefano Carlo Previtali, Quattrini, A., Fasolini, M., Imperiale, D., Panzeri, C., Villa, A., Messing, A., Canal, N., Wrabetz, L., and Feltri, M. L.
28. Eight novel mutations in SPG4 in a large sample of patients with hereditary spastic paraplegia
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Crippa, F., Panzeri, C., Martinuzzi, A., Arnoldi, A., Redaelli, F., Tonelli, A., Baschirotto, C., Vazza, G., Mostacciuolo, M. L., Daga, A., Orso, G., Profice, P., Trabacca, A., D'Angelo, M., G, ., Comi, G. P, Galbiati, S., Lamperti, C., Bonato, S., Pandolfo, M., Meola, G., Musumeci, Olimpia, Toscano, Antonio, Trevisan, C. P., Bresolin, N., and Bassi, M. T
- Subjects
Adult ,Male ,Pathology ,medicine.medical_specialty ,Spastin ,Hereditary spastic paraplegia ,DNA Mutational Analysis ,PROTEIN ,INTERACTS ,FREQUENT ,medicine.disease_cause ,Exon ,chemistry.chemical_compound ,GENE MUTATIONS ,PARAPARESIS ,SPECTRUM ,FORM ,Degenerative disease ,Arts and Humanities (miscellaneous) ,GENE-MUTATIONS ,medicine ,Humans ,Gene ,Aged ,Adenosine Triphosphatases ,Family Health ,Genetics ,Mutation ,Spastic Paraplegia, Hereditary ,Genetic heterogeneity ,business.industry ,Exons ,Middle Aged ,medicine.disease ,Italy ,chemistry ,Female ,Neurology (clinical) ,business ,DNA - Abstract
Background Hereditary spastic paraplegia (HSP) is a group of genetically heterogeneous disorders characterized by progressive spasticity of the lower limbs. Mutations in the SPG4 gene, which encodes spastin protein, are responsible for up to 45% of autosomal dominant cases. Objective To search for disease-causing mutations in a large series of Italian patients with HSP. Design Samples of DNA were analyzed by direct sequencing of all exons in SPG4 . Samples from a subset of patients were also analyzed by direct sequencing of all exons in SPG3A, SPG6, SPG10 , and SPG13 . Setting Molecular testing facility in Italy. Patients Sixty unrelated Italian patients with pure (n = 50) and complicated (n = 10) HSP. Main Outcome Measures Mutations in SPG4, SPG3A, SPG6, SPG10 , and SPG13 . Results We identified 12 different mutations, 8 of which were novel, in 13 patients. No mutations of any of the other HSP genes tested were found in 15 patients with sporadic pure HSP who did not have mutations in the SPG4 gene. Conclusions The overall rate of mutation in the SPG4 gene within our sample was 22%, rising to 26% when only patients with pure HSP were considered. The negative result obtained in 15 patients without mutations in SPG4 in whom 4 other genes were analyzed ( SPG3A, SPG6, SPG10 , and SPG13 ) indicate that these genes are not frequently mutated in sporadic pure HSP.
29. The role of somatostatin and octreotide in bowel obstruction: Pre-clinical and clinical results
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Carla Ripamonti, Panzeri, C., Groff, L., Galeazzi, G., and Boffi, R.
30. A research method in safety culture for the safety of health services in Italy,Un metodo di indagine sulla safety culture per la sicurezza dei servizi sanitari in Italia
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Brusoni, M., Deriu, P. L., Panzeri, C., and Elisabetta Trinchero
31. Nitric oxide inhibition of Drp1-mediated mitochondrial fission is critical for myogenic differentiation
- Author
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Sara Cipolat, C. De Palma, Emilio Clementi, S. Pisoni, Giulio Cossu, Silvia Brunelli, Sarah Pambianco, Chris Panzeri, Sestina Falcone, Salvador Moncada, Tullio Pozzan, Addolorata Pisconti, Raffaele Allevi, Maria Teresa Bassi, Luca Scorrano, De Palma, C, Falcone, S, Pisoni, S, Cipolat, S, Panzeri, C, Pambianco, S, Pisconti, A, Allevi, R, Bassi, M, Cossu, G, Pozzan, T, Moncada, S, Scorrano, L, Brunelli, S, and Clementi, E
- Subjects
Mitochondria, Muscle/*metabolism/physiology/ultrastructure ,Cellular differentiation ,Apoptosis ,Mitochondrion ,Muscle Development ,GTP Phosphohydrolases ,GTP Phosphohydrolase ,Myoblasts ,chemistry.chemical_compound ,Mice ,0302 clinical medicine ,Myocyte ,Cyclic GMP ,0303 health sciences ,Microscopy, Confocal ,ATP synthase ,Myogenesis ,Cell Differentiation ,Cell biology ,Mitochondrial fission ,Signal transduction ,Myoblasts/*cytology/metabolism/ultrastructure ,Guanylate Cyclase/metabolism ,Microtubule-Associated Proteins ,Nitric Oxide/biosynthesis/*metabolism ,Dynamins ,Myoblast ,Mitochondrial Proteins/metabolism ,Cell Respiration ,Immunoblotting ,Microtubule-Associated Proteins/*metabolism ,Biology ,Nitric Oxide ,Article ,Nitric oxide ,Mitochondrial Proteins ,03 medical and health sciences ,Microscopy, Electron, Transmission ,Mitochondrial Protein ,Animals ,ddc:612 ,Molecular Biology ,030304 developmental biology ,Muscle Development/*physiology ,Animal ,Microtubule-Associated Protein ,Apoptosi ,Cell Biology ,Mitochondria, Muscle ,Cyclic GMP/metabolism ,chemistry ,Guanylate Cyclase ,biology.protein ,GTP Phosphohydrolases/*metabolism ,030217 neurology & neurosurgery - Abstract
During myogenic differentiation the short mitochondria of myoblasts change into the extensively elongated network observed in myotubes. The functional relevance and the molecular mechanisms driving the formation of this mitochondrial network are unknown. We now show that mitochondrial elongation is required for myogenesis to occur and that this event depends on the cellular generation of nitric oxide (NO). Inhibition of NO synthesis in myogenic precursor cells leads to inhibition of mitochondrial elongation and of myogenic differentiation. This is due to the enhanced activity, translocation and docking of the pro-fission GTPase dynamin-related protein-1 (Drp1) to mitochondria, leading also to a latent mitochondrial dysfunction that increased sensitivity to apoptotic stimuli. These effects of NO inhibition were not observed in myogenic precursor cells containing a dominant-negative form of Drp1. Both NO-dependent repression of Drp1 action and maintenance of mitochondrial integrity and function were mediated through the soluble guanylate cyclase. These data uncover a novel level of regulation of differentiation linking mitochondrial morphology and function to myogenic differentiation. © 2010 Macmillan Publishers Limited All rights reserved.
- Published
- 2010
32. A novel mutation in KCNQ2 associated with BFNC, drug resistant epilepsy, and mental retardation
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Maurizio Taglialatela, Renato Borgatti, Pasqualina Castaldo, M. T. Bassi, C Baschirotto, Claudio Zucca, B. Dalla Bernardina, M Ferrario, Nereo Bresolin, Maria Virginia Soldovieri, Chris Panzeri, Anna Cavallini, Borgatti, R, Zucca, C, Cavallini, A, Ferrario, M, Panzeri, C, Castaldo, Pasqualina, Soldovieri, Mv, Baschirotto, C, Bresolin, N, Dalla Bernardina, B, Taglialatela, Maurizio, and Bassi, Mt
- Subjects
Male ,Protein Conformation ,Mutant ,Drug Resistance ,medicine.disease_cause ,Epilepsy ,Cricetinae ,Convulsion ,Missense mutation ,Benign familial neonatal seizures ,KCNQ2 ,Genetics ,Mutation ,Magnetic Resonance Imaging ,Pedigree ,Phenotype ,Potassium Channels, Voltage-Gated ,Anticonvulsants ,Female ,medicine.symptom ,Ion Channel Gating ,Adult ,medicine.medical_specialty ,Protein subunit ,Molecular Sequence Data ,Mutation, Missense ,CHO Cells ,Biology ,Quadriplegia ,Structure-Activity Relationship ,Cricetulus ,Intellectual Disability ,Internal medicine ,medicine ,Animals ,Humans ,KCNQ2 Potassium Channel ,Point Mutation ,Homomeric ,Amino Acid Sequence ,Ion Transport ,Infant, Newborn ,medicine.disease ,Epilepsy, Benign Neonatal ,Protein Subunits ,Endocrinology ,BFNC ,Amino Acid Substitution ,epilepsy ,Epilepsies, Partial ,Neurology (clinical) - Abstract
Background: Benign familial neonatal convulsion (BFNC) is a rare autosomal dominant disorder caused by mutations in two genes, KCNQ2 and KCNQ3, encoding for potassium channel subunits underlying the M-current. This current limits neuronal hyperexcitability by causing spike-frequency adaptation. Methods: The authors describe a BFNC family with four affected members: two of them exhibit BFNC only while the other two, in addition to BFNC, present either with a severe epileptic encephalopathy or with focal seizures and mental retardation. Results: All affected members of this family carry a novel missense mutation in the KCNQ2 gene (K526N), disrupting the tri-dimensional conformation of a C-terminal region of the channel subunit involved in accessory protein binding. When heterologously expressed in CHO cells, potassium channels containing mutant subunits in homomeric or heteromeric configuration with wild-type KCNQ2 and KCNQ3 subunits exhibit an altered voltage-dependence of activation, without changes in intracellular trafficking and plasma membrane expression. Conclusion: The KCNQ2 K526N mutation may affect M-channel function by disrupting the complex biochemical signaling involving KCNQ2 C-terminus. Genetic rather than acquired factors may be involved in the pathophysiology of the phenotypic variability of the neurologic symptoms associated with BFNC in the described family.
- Published
- 2004
33. Autoantibodies to amphiphysin I and amphiphysin II in a patient with sensory-motor neuropathy
- Author
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Alessandro Saibene, R. Longhi, Orazio Carandente, R. Sciolla, Angelo Quattrini, R. Nemni, Stefano C. Previtali, C. Panzeri, Lucia Perego, P. Gai, Franco Folli, Antonello Villa, Giacomo Dell'Antonio, Perego, L, Previtali, S, Nemni, R, Longhi, R, Carandente, O, Saibene, A, Sciolla, R, Villa, A, Gai, P, Panzeri, C, Dell'Antonio, G, Quattrini, A, and Folli, F
- Subjects
Male ,Hereditary Sensory and Autonomic Neuropathie ,Blotting, Western ,Neural Conduction ,Fluorescent Antibody Technique ,Nerve Tissue Proteins ,Motor Neuron ,Pathogenesis ,AMPHIPHYSIN I ,Medicine ,Humans ,Hereditary Sensory and Autonomic Neuropathies ,AMPHIPHYSIN II ,Aged ,Autoantibodies ,Motor Neurons ,Sensory motor ,biology ,business.industry ,Autoantibody ,Autoantibodie ,Peripheral ,Neurology ,Nerve Tissue Protein ,Immunology ,biology.protein ,Neural antigens ,Neurology (clinical) ,Antibody ,business - Abstract
A proportion of patients with peripheral neuropathies has circulating autoantibodies directed against neural antigens. In some cases, autoantibodies may play a pathogenic role. We studied a patient with a progressive sensory-motor axonal neuropathy of unknown etiology, looking for circulating autoantibodies against neural antigens and we showed that the patient’s serum contained anti-amphiphysin I (AMP I) and amphiphysin II (AMP II) autoantibodies. A sural nerve biopsy revealed an axonal neuropathy. Indirect immunofluorescence experiments with the patient’s serum showed a staining of rat axons due to α-AMP I autoantibodies and a specific labelling of cytoplasm and Schmidt-Lanterman incisures of Schwann cells due to α-AMP II autoantibodies. In conclusion we identified a patient affected by a sensory-motor neuropathy with autoantibodies against both AMP I and AMP II.
- Published
- 2002
34. Junctional adhesion molecule, a novel member of the immunoglobulin superfamily that distributes at intercellular junctions and modulates monocyte transmigration
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Paolo Fruscella, Markus Schneemann, Elisabetta Dejana, Antonella Stoppacciaro, Maria Romano, Antonello Villa, David Simmons, Ines Martin-Padura, Lisa Williams, Carla Panzeri, Luigi Ruco, Susan Lostaglio, Martìn Padura, I, Lostaglio, S, Schneemann, M, Williams, L, Romano, M, Fruscella, P, Panzeri, C, Stoppacciaro, A, Ruco, L, Villa, A, Simmons, D, and Dejana, E
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Intercellular cleft ,Male ,Junctional Adhesion Molecules ,tight junctions ,Occludin ,Cell junction ,Monocytes ,Mice ,0302 clinical medicine ,Cell Movement ,Cloning, Molecular ,Skin ,0303 health sciences ,Tight junction ,Tight Junction ,Antibodies, Monoclonal ,Articles ,Cell biology ,Cingulin ,Antigen ,COS Cells ,monocyte ,Junctional Adhesion Molecule C ,Junctional Adhesion Molecule A ,Immunoglobulin gene ,DNA, Complementary ,endothelium ,Molecular Sequence Data ,Immunoglobulins ,Biology ,Transfection ,Cell Line ,03 medical and health sciences ,COS Cell ,Immunoglobulin ,Cell Adhesion ,Animals ,Amino Acid Sequence ,Antigens ,epithelium ,inflammation ,monocyte tight junctions ,030304 developmental biology ,Epithelial Cell ,Base Sequence ,Animal ,Epithelial Cells ,Cell Biology ,Rats ,Cell Adhesion Molecule ,Rats, Inbred Lew ,Rat ,Cell Adhesion Molecules ,030217 neurology & neurosurgery - Abstract
Tight junctions are the most apical components of endothelial and epithelial intercellular cleft. In the endothelium these structures play an important role in the control of paracellular permeability to circulating cells and solutes. The only known integral membrane protein localized at sites of membrane–membrane interaction of tight junctions is occludin, which is linked inside the cells to a complex network of cytoskeletal and signaling proteins. We report here the identification of a novel protein (junctional adhesion molecule [JAM]) that is selectively concentrated at intercellular junctions of endothelial and epithelial cells of different origins. Confocal and immunoelectron microscopy shows that JAM codistributes with tight junction components at the apical region of the intercellular cleft. A cDNA clone encoding JAM defines a novel immunoglobulin gene superfamily member that consists of two V-type Ig domains. An mAb directed to JAM (BV11) was found to inhibit spontaneous and chemokine-induced monocyte transmigration through an endothelial cell monolayer in vitro. Systemic treatment of mice with BV11 mAb blocked monocyte infiltration upon chemokine administration in subcutaneous air pouches. Thus, JAM is a new component of endothelial and epithelial junctions that play a role in regulating monocyte transmigration.
- Published
- 1998
35. P-selectin is expressed on the oolemma of human and hamster oocytes following sperm adhesion and is also detected on the equatorial region of acrosome-reacted human spermatozoa
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F M, Fusi, M, Montesano, N, Bernocchi, C, Panzeri, F, Ferrara, A, Villa, R A, Bronson, Fusi, F, Montesano, M, Bernocchi, N, Panzeri, C, Ferrara, F, Villa, A, and Bronson, R
- Subjects
Sperm-Ovum Interactions ,Male ,Oocyte ,Sperm-Ovum Interaction ,Animal ,Flow Cytometry ,Spermatozoa ,P-Selectin ,Cricetinae ,Oocytes ,Cell Adhesion ,Animals ,Humans ,Female ,Acrosome - Abstract
Selectins are a family of adhesive molecules, involved in the interactions between leukocytes and endothelium and in platelet adhesion. P-selectin, one of the members of this family, is stored in alpha-granules and dense granules of platelets as well as in Weibel-Palade bodies of endothelial cells, and it is rapidly redistributed to the cell surface after activation. It recognizes carbohydrate structures as ligands, in particular sialyl-Lewis(x), which is part of the CD15 antigen. In this work we studied P-selectin expression on gametes. While zona-free human and hamster oocytes did not react with a monoclonal antibody directed against P-selectin, oocytes from both species displayed a reactivity with this antibody following their contact with human spermatozoa, as demonstrated both by covasphere binding and indirect immunofluorescence. Artificial activation of zona-intact human oocytes by means of the calcium lonophore A23187 induced the expression on the oolemma of a moiety reacting with anti-P-selectin antibody as well. P-selectin also appeared to be expressed on the sperm surface following the acrosome reaction, as demonstrated by a flow cytometric study of reactivity of spermatozoa with the anti-P-selectin antibody, using the expression of CD46 as a marker of the acrosome reaction. The localization of the P-selectin moiety on the equatorial region of the plasma membrane of acrosome reacted spermatozoa was confirmed by transmission electron microscopy using immunogold labelling. We suggest that P-selectin might be involved in gamete interactions.
- Published
- 1996
36. Variant reclassification over time decreases the level of diagnostic uncertainty in monogenic obesity: Experience from two centres.
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Morandi A, Fornari E, Corradi M, Umano GR, Olivieri F, Piona C, Maguolo A, Panzeri C, Emiliani F, Cirillo G, Cavarzere P, Miraglia Del Giudice E, and Maffeis C
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- Humans, Child, Female, Male, Adolescent, Genetic Testing methods, Uncertainty, Italy epidemiology, Genetic Variation, Genetic Predisposition to Disease, Pediatric Obesity diagnosis, Pediatric Obesity genetics, Pediatric Obesity epidemiology
- Abstract
Background: The diagnosis of monogenic obesity is burdened by frequent variants of uncertain significance (VUS). We describe our real-life approach of variant reassessment over time and we assess whether inconclusive variants are decreasing in monogenic obesity., Methods: We tested for monogenic obesity (genes: LEPR, POMC, ADCY3, PCSK1, CARTPT, SIM1, MRAP2, LEP, NTRK2, BDNF, KSR2, MAGEL2, SH2B1, MC4R, MC3R) in 101 children/adolescents (11.7 [7.3-13.7] years, 3.6 [3.3-4.0] z-BMI) in Verona and 183 (11.3 [8.4-12.2] years, 3.2 [2.7-3.9] z-BMI) in Naples from January 2020 to February 2023. In March-July 2024 we reassessed the baseline variants by updated software interpretation and literature renavigation., Results: We initially found 20 VUS, 4 Likely Pathogenic (LP), 5 Likely Benign (LB) and 1 benign variant in 33 individuals. At follow-up, 6 VUS were reclassified as benign/LB, one LP as pathogenic and 3 LB as benign. Overall, 10/30 variants (6/18 in Verona, 3/11 in Naples and a variant found in both centres) were reclassified, leading to a less uncertain report for 13 of 33 variant-carrying patients. Monogenic obesity was diagnosed in 3 probands in Verona and 4 in Naples, carrying variants at MC4R or NTRK2., Conclusion: Our variant reassessment was effective to improve classification certainty for the 39% of patients and suggested that the molecular diagnosis of monogenic obesity is becoming more accurate over time., (© 2024 The Author(s). Pediatric Obesity published by John Wiley & Sons Ltd on behalf of World Obesity Federation.)
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- 2024
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37. Potential Micronutrient Deficiencies in the First 1000 Days of Life: The Pediatrician on the Side of the Weakest.
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Panzeri C, Pecoraro L, Dianin A, Sboarina A, Arnone OC, Piacentini G, and Pietrobelli A
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- Humans, Infant, Infant, Newborn, Nutritional Status, Infant Nutritional Physiological Phenomena, Child Development, Micronutrients deficiency, Dietary Supplements
- Abstract
Purpose of Review: This study is to examine potential micronutrient deficiencies and any need for supplementation in children following specific diet plans in the first 1000 days of life., Recent Findings: Optimal nutrition in the first 1000 days of life has a lifelong positive impact on child development. Specific intrauterine and perinatal factors, pathological conditions, and dietary restrictions can represent potential risk factors for micronutrient deficiencies in the first 1000 days of life, which can have negative systemic consequences. Preterm and low-birth-weight infants are intrinsically at risk because of immature body systems. Children affected by cystic fibrosis are prone to malnutrition because of intestinal malabsorption. The risk of micronutrient deficiency can increase in various situations, including but not limited to children following selective dietary regimens (vegetarian and vegan diets and children affected by specific neuropsychiatric conditions) or specific dietary therapies (children affected by food allergies or specific metabolic disorders and children following restricted diet as a part of therapeutic approach, i.e., ketogenic diet for epilepsy). In light of this situation, the micronutrient status in these categories of children should be investigated in order to tailor strategies specific to the individual's metabolic needs, with a particular focus on deficiencies which can impair or delay the physical and cognitive development of children, namely, vitamin B12, vitamin D and folic acid, as well as oligo-elements such as iron, zinc, calcium, sodium, magnesium, and phosphorus, and essential fatty acids such as omega-3. Identification of micronutrient deficiency in the first 1000 days of life and timely supplementation proves essential to prevent their long-term consequences., (© 2024. The Author(s).)
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- 2024
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38. Prospective clinical study on the incidence of catheter-related complications in a neurological intensive care unit: 4 years of experience.
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Bolis D, D'Arrigo S, Bartesaghi A, Panzeri C, Pelegalli P, Steffanoni A, Scoppettuolo G, and Pittiruti M
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- Humans, Incidence, Prospective Studies, Risk Factors, Intensive Care Units, Postoperative Complications, Retrospective Studies, Catheterization, Central Venous adverse effects, Catheter-Related Infections diagnosis, Catheter-Related Infections epidemiology, Catheter-Related Infections etiology, Central Venous Catheters adverse effects, Catheterization, Peripheral adverse effects
- Abstract
Introduction: Over the past decades, significant efforts have been made to reduce early and late catheter-related complications in critically ill patients, using approaches based on bundles of evidence-based interventions., Methods: In this prospective clinical study, the authors evaluated the incidence of catheter-related complications in their neuro-intensive care unit during a 4-year period, adopting systematically the GAVeCeLT bundles for the insertion and management of all central venous access devices: centrally inserted central catheters (CICCs), peripherally inserted central catheters (PICCs) and femorally inserted central catheters (FICCs). All early/immediate and late complications were recorded., Results: On 486 central lines (328 CICCs, 149 PICCs and 9 FICCs), the only clinically relevant early/immediate complication was primary tip malposition (1%). In regards late infective complications, the authors did not record any case of catheter-related bloodstream infection; though, they observed one case of central line associated blood stream infection (one CICC; 0.14/1000 catheter days), and 15 cases of catheter colonization (12 CICCs and 3 PICCs; 2.09 episodes/1000 catheter days). Late non-infective complications were few: 14 accidental dislodgments (2.9%), 18 irreversible lumen occlusions (3.7%), and no episodes of symptomatic catheter-related thrombosis or tip migration., Conclusion: The systematic adoption of the GAVeCeLT bundles for CVAD insertion and maintenance was associated with a minimization of catheter-related complications. The strict adherence to the recommendations included in these bundles was the major determinant for clinical success., Competing Interests: Declaration of conflicting interestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
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- 2024
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39. Parental perception of SIDS prevention measures: where are we at?
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Pecoraro L, Panzeri C, Nisi F, Lauriola S, Piacentini G, and Pietrobelli A
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- Humans, Perception, Parents, Sudden Infant Death prevention & control
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- 2023
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40. Efficacy of sofosbuvir-based therapies in HIV/HCV infected patients and persons who inject drugs.
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Puoti M, Panzeri C, Rossotti R, and Baiguera C
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- Coinfection drug therapy, Coinfection virology, Drug Therapy, Combination, HIV-1 isolation & purification, Hepacivirus isolation & purification, Humans, Sofosbuvir, Uridine Monophosphate therapeutic use, Antiviral Agents therapeutic use, HIV Infections drug therapy, HIV Infections virology, Hepatitis C drug therapy, Hepatitis C virology, Substance Abuse, Intravenous virology, Uridine Monophosphate analogs & derivatives
- Abstract
In the era of Directly Acting anti HCV Antivirals treatment of hepatitis C is successful in the majority of persons treated. However, treatment of persons with HIV or who inject drugs remains challenging because of special issues: drug-drug interactions with antiretroviral, psychiatric and drug substitution therapies, treatment adherence, impact of treatment on HIV disease course or on risk of bacterial infections. Sofosbuvir induced sustained virologic response in 91% of 23 HIV/HCV coinfected persons treated in combination with ribavirin and pegylated interferon, in 83% of 497 treated in combination with ribavirin and in all 50 patients infected with HCV GT1 treated in combination with ledipasvir and ribavirin. The rates of efficacy in HCV-HIV coinfected were almost the same as those observed in HCV monoinfected suggesting that the efficacy of sofosbuvir is not reduced by HIV coinfection. There are no data on the efficacy of sofosbuvir in injection drugs users. The pangenotypic activity, the high barrier to resistance, the modest potential for drug-drug interactions makes sofosbuvir a reference drug for the treatment of these two special populations., (Copyright © 2014 Editrice Gastroenterologica Italiana S.r.l. All rights reserved.)
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- 2014
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41. Optimizing treatment in HIV/HCV coinfection.
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Puoti M, Rossotti R, Travi G, Panzeri C, Morreale M, Chiari E, Cocca G, Orso M, and Moioli MC
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- Anti-Retroviral Agents therapeutic use, Coinfection drug therapy, Drug Interactions, Drug Therapy, Combination, Hepacivirus genetics, Hepatitis C virology, Humans, Interferons therapeutic use, Oligopeptides therapeutic use, Proline analogs & derivatives, Proline therapeutic use, Ribavirin therapeutic use, Antiviral Agents therapeutic use, HIV Infections drug therapy, Hepatitis C drug therapy
- Abstract
Sustained virological response (SVR) to anti-hepatitis C virus (HCV) treatment is an outcome that can improve life expectancy in persons with human immunodeficiency virus (HIV) infection. Results of anti-HCV treatment are poor, and less than 50% of treated patients show SVR to peginterferon plus ribavirin combination therapy; in infections from HCV genotype 1 this proportion is less than 40%. Pilot studies have demonstrated that Boceprevir or Telaprevir in combination with peginterferon plus ribavirin are able to increase the SVR rate from 45% to 74% with Telaprevir, and from 26% to 61% with Boceprevir in persons never treated for hepatitis C. Interim data seem to indicate a high rate of HCV RNA undetectability on treatment also in patients without sustained response to peginterferon plus ribavirin. Both Telaprevir and Boceprevir have drug-drug interactions with antiretrovirals, and options for concurrent antiretroviral therapy are restricted. There are also several new anti-HCV drugs under study with the potential for more tolerable effective future regimens. The indication for treatment in a patient with HCV/HIV coinfection should take into account the priority of treatment, the probability of sustained response, the potential toxicities, the concurrent antiretroviral therapy options, the patient's motivation, and the sustainability of current and future therapies., (Copyright © 2013 Editrice Gastroenterologica Italiana S.r.l. Published by Elsevier Ltd. All rights reserved.)
- Published
- 2013
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42. Extracorporeal life support in a severe Taxus baccata poisoning.
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Panzeri C, Bacis G, Ferri F, Rinaldi G, Persico A, Uberti F, and Restani P
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- Adult, Anti-Arrhythmia Agents poisoning, Bradycardia complications, Extracorporeal Membrane Oxygenation adverse effects, Foodborne Diseases, Heart-Assist Devices adverse effects, Humans, Male, Phloroglucinol analogs & derivatives, Plant Leaves poisoning, Plant Poisoning etiology, Seizures complications, Tachycardia, Ventricular complications, Taxaceae, Taxoids, Alkaloids poisoning, Plant Poisoning diagnosis, Plant Poisoning therapy, Taxus poisoning
- Abstract
Introduction: Yew (Taxus baccata) is a conifer known to be toxic since ancient times. Taxine A and taxine B, the toxic alkaloids of Taxus, block cardiac sodium and calcium channels causing nausea, vomiting, abdominal pain, cardiac arrhythmias, respiratory distress, coma, seizures, and death in yew poisoning., Case Report: A 44-year-old male farmer was admitted to the hospital because of a suspected myocardial infarction. First bradycardia and then ventricular tachycardia were present and a severe right ventricular dilatation with biventricular dysfunction was observed but with normal coronary arteriography. He was resistant to conventional therapy and, 6 h after hospital admission, extracorporeal support with membrane oxygenation was applied. The patient recovered. Nine days later, a large number of yew leaves were unexpectedly observed in his feces. Botanical and laboratory analysis confirmed the poisoning. Blood (651 ng/mL) and urinary (5.6 mcg/mL) levels of 3,5-dimethoxyphenol (metabolite of taxicatine) were greater than previously reported in lethal cases. The patient was transferred to a psychiatric unit 17 days after admission., Conclusions: Intensive treatment of severe cardiovascular symptoms with antiarrhythmic drugs, temporary pacemaker, intra-aortic balloon pump, extracorporeal membrane oxygenation, and extracorporeal life support can be life-saving even after a potentially lethal ingestion of T. baccata leaves.
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- 2010
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43. Characterization of two novel SETX mutations in AOA2 patients reveals aspects of the pathophysiological role of senataxin.
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Airoldi G, Guidarelli A, Cantoni O, Panzeri C, Vantaggiato C, Bonato S, Grazia D'Angelo M, Falcone S, De Palma C, Tonelli A, Crimella C, Bondioni S, Bresolin N, Clementi E, and Bassi MT
- Subjects
- Adult, Apoptosis, Camptothecin pharmacology, DNA Damage, DNA Helicases, Female, Homozygote, Humans, Hydrogen Peroxide pharmacology, Male, Middle Aged, Mitomycin pharmacology, Multifunctional Enzymes, Pedigree, Apraxia, Ideomotor genetics, Ataxia genetics, Eye Diseases genetics, Mutation, RNA Helicases genetics
- Abstract
Ataxia with oculomotor apraxia (AOA) type 2 (AOA2 MIM 606002) is a recessive subtype of AOA characterized by cerebellar atrophy, oculomotor apraxia, early loss of reflexes, and peripheral neuropathy. Various mutations either in homozygous or compound heterozygous condition were so far identified in the associated gene SETX (MIM 608465). SETX encodes a large protein called senataxin with a DNA-RNA helicase domain and a putative N-terminus protein interaction domain. Here, we report the identification of two novel homozygous mutations in SETX gene, c.340_342delCTT (p.L114Del) and c.1669C > T (p.R557X), in two AOA2 families. The characterization of the mutant lymphoblastoid cell lines for sensitivity to oxidative DNA-damaging agents indicates that the p.L114Del deletion confers an increased sensitivity to H2O2, camptothecin, and mitomycin C, previously found to induce death in lymphoblasts harbouring other SETX mutations; the cells carrying the nonsense mutation display instead values within the normal range. Further analysis of a neuronal cell model SKNBE, transfected with the mutant senataxin proteins, reveals increased sensitivity also to staurosporine and excitotoxicity associated with the p.L114Del mutant only. We also demonstrate that the sensitizing effect of p.L114Del on apoptosis can be reversed by senataxin silencing. The ability of a single amino acid deletion to sensitize cells to death by different agents, compared to the lack of effect of a whole protein deletion, seems to exclude a protective role played by the native protein while suggesting that a specific mutation confers to the protein the ability to enhance the toxic effect of various cell damaging agents.
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- 2010
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44. Endothelial nitric oxide synthase overexpression by neuronal cells in neurodegeneration: a link between inflammation and neuroprotection.
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De Palma C, Falcone S, Panzeri C, Radice S, Bassi MT, and Clementi E
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- Amyotrophic Lateral Sclerosis enzymology, Amyotrophic Lateral Sclerosis genetics, Amyotrophic Lateral Sclerosis physiopathology, Cell Death genetics, Cell Line, Tumor, Cell Survival genetics, Cytoprotection genetics, Encephalitis physiopathology, Guanine Nucleotide Exchange Factors genetics, Guanine Nucleotide Exchange Factors metabolism, Humans, Nerve Degeneration physiopathology, Neurodegenerative Diseases physiopathology, Neurons pathology, Nitric Oxide biosynthesis, Oxidative Stress drug effects, Oxidative Stress genetics, Peroxynitrous Acid biosynthesis, Proto-Oncogene Proteins c-akt genetics, Proto-Oncogene Proteins c-akt metabolism, Receptors, Lysosphingolipid agonists, Receptors, Lysosphingolipid genetics, Receptors, Lysosphingolipid metabolism, Transfection, Tumor Necrosis Factor-alpha immunology, Tumor Necrosis Factor-alpha pharmacology, Encephalitis enzymology, Nerve Degeneration enzymology, Neurodegenerative Diseases enzymology, Neurons enzymology, Nitric Oxide Synthase Type III metabolism
- Abstract
The roles of neuronal and inducible nitric oxide synthases in neurones have been extensively investigated; by contrast, the biological significance of endothelial nitric oxide synthase (eNOS) overexpression that occurs in several pathological conditions has not yet been studied. We have started addressing this issue in a cell model of neurodegeneration, i.e. human SKNBE neuroblastoma cells transfected with a mutant form of alsin, a protein causing an early-onset type of amyotrophic lateral sclerosis, ALS2. We found that eNOS, which is endogenously expressed by these cells, was activated by tumour necrosis factor-alpha (TNF-alpha), a proinflammatory cytokine that plays important roles in ALS2 and several neurodegenerative diseases. The TNF-alpha-dependent eNOS activation occurred through generation, by sphingosine-kinase-1, of sphingosine-1-phosphate, stimulation of its membrane receptors and activation of Akt, as determined using small interference RNA and dominant negative constructs specific for the enzymes and receptors. eNOS activation by TNF-alpha conferred cytoprotection from excitotoxicity and neurotoxic cues such as reactive oxygen species, endoplasmic reticulum stress, DNA damage, and mutated alsin itself. Our results suggest that overexpression of eNOS by neurones is a broad-range protective mechanism activated during damage and establish a link of pathophysiological relevance between this enzyme and inflammation accompanying neurodegenerative diseases. These findings also question the concept that high NO output in the presence of oxidative stress leads always to peroxynitrite formation contributing to neurodegeneration.
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- 2008
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45. Cryptogenic epileptic syndromes related to SCN1A: twelve novel mutations identified.
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Zucca C, Redaelli F, Epifanio R, Zanotta N, Romeo A, Lodi M, Veggiotti P, Airoldi G, Panzeri C, Romaniello R, De Polo G, Bonanni P, Cardinali S, Baschirotto C, Martorell L, Borgatti R, Bresolin N, and Bassi MT
- Subjects
- Adolescent, Adult, Age of Onset, Child, Child, Preschool, Chromosome Deletion, Epilepsies, Myoclonic diagnosis, Epilepsies, Myoclonic genetics, Epilepsies, Partial diagnosis, Epilepsies, Partial genetics, Epilepsy diagnosis, Epilepsy, Generalized diagnosis, Epilepsy, Generalized genetics, Female, Follow-Up Studies, Genetic Carrier Screening, Genotype, Humans, Infant, Male, NAV1.1 Voltage-Gated Sodium Channel, Phenotype, Point Mutation, Seizures, Febrile diagnosis, Seizures, Febrile genetics, DNA Mutational Analysis, Epilepsy genetics, Nerve Tissue Proteins genetics, Sodium Channels genetics
- Abstract
Background: Sodium channel alpha 1 subunit gene, SCN1A, is the gene encoding the neuronal voltage-gated sodium channel alpha 1 subunit (Na(v)1.1) and is mutated in different forms of epilepsy. Mutations in this gene were observed in more than 70% of patients with severe myoclonic epilepsy of infancy (SMEI) and were also found in different types of infantile epileptic encephalopathy., Objective: To search for disease-causing mutations in SCN1A in patients with cryptogenic epileptic syndromes (ie, syndromes with an unknown cause)., Design: Clinical characterization and molecular genetic analysis of a cohort of patients., Setting: University hospitals, rehabilitation centers, and molecular biology laboratories., Patients: Sixty unrelated patients with cryptogenic epileptic syndromes., Main Outcome Measures: Samples of DNA were analyzed for mutations and for large heterozygous deletions encompassing the SCN1A gene. A search for microdeletions in the SCN1A gene was also performed in the subset of patients with SMEI/SMEI-borderland who had negative results at the point mutation screening., Results: No large deletions at the SCN1A locus were found in any of the patients analyzed. In contrast, 13 different point mutations were identified in 12 patients: 10 with SMEI, 1 with generalized epilepsy with febrile seizures plus, and 1 with cryptogenic focal epilepsy. An additional search for SCN1A intragenic microdeletions in the remaining patients with SMEI/SMEI-borderland and no point mutations was also negative., Conclusions: These results confirm the role of the SCN1A gene in different types of epilepsy, including cryptogenic epileptic syndromes. However, large deletions encompassing SCN1A were not common disease-causing rearrangements in this group of epilepsies.
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- 2008
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46. A clinical, genetic, and biochemical characterization of SPG7 mutations in a large cohort of patients with hereditary spastic paraplegia.
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Arnoldi A, Tonelli A, Crippa F, Villani G, Pacelli C, Sironi M, Pozzoli U, D'Angelo MG, Meola G, Martinuzzi A, Crimella C, Redaelli F, Panzeri C, Renieri A, Comi GP, Turconi AC, Bresolin N, and Bassi MT
- Subjects
- ATPases Associated with Diverse Cellular Activities, Adolescent, Adult, Base Sequence, Child, Child, Preschool, Codon, Nonsense, Cohort Studies, DNA Mutational Analysis, DNA, Complementary genetics, Electron Transport Complex I genetics, Electron Transport Complex I metabolism, Female, Fibroblasts metabolism, Genes, Recessive, Haplotypes, Humans, Italy, Male, Middle Aged, Mitochondria, Muscle metabolism, Molecular Sequence Data, Pedigree, Point Mutation, Sequence Deletion, Spastic Paraplegia, Hereditary metabolism, Metalloendopeptidases genetics, Mutation, Spastic Paraplegia, Hereditary genetics
- Abstract
Mutations in the SPG7 gene encoding a mitochondrial protein termed paraplegin, are responsible for a recessive form of hereditary spastic paraparesis. Only few studies have so far been performed in large groups of hereditary spastic paraplegia (HSP) patients to determine the frequency of SPG7 mutations. Here, we report the result of a mutation screening conducted in a large cohort of 135 Italian HSP patients with the identification of six novel point mutations and one large intragenic deletion. Sequence analysis of the deletion breakpoint, together with secondary structure predictions of the deleted region, indicate that a complex rearrangement, likely caused by extensive secondary structure formation mediated by the short interspersed nuclear element (SINE) retrotransposons, is responsible for the deletion event. Biochemical studies performed on fibroblasts from three mutant patients revealed mild and heterogeneous mitochondrial dysfunctions that would exclude a specific association of a complex I defect with the pathology at the fibroblast level. Overall, our data confirm that SPG7 point mutations are rare causes of HSP, in both sporadic and familial forms, while underlying the puzzling and intriguing aspects of histological and biochemical consequences of paraplegin loss., (Copyright 2008 Wiley-Liss, Inc.)
- Published
- 2008
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47. Eight novel mutations in SPG4 in a large sample of patients with hereditary spastic paraplegia.
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Crippa F, Panzeri C, Martinuzzi A, Arnoldi A, Redaelli F, Tonelli A, Baschirotto C, Vazza G, Mostacciuolo ML, Daga A, Orso G, Profice P, Trabacca A, D'Angelo MG, Comi GP, Galbiati S, Lamperti C, Bonato S, Pandolfo M, Meola G, Musumeci O, Toscano A, Trevisan CP, Bresolin N, and Bassi MT
- Subjects
- Adult, Aged, DNA Mutational Analysis methods, Exons, Family Health, Female, Humans, Italy, Male, Middle Aged, Spastic Paraplegia, Hereditary classification, Spastin, Adenosine Triphosphatases genetics, Mutation, Spastic Paraplegia, Hereditary genetics
- Abstract
Background: Hereditary spastic paraplegia (HSP) is a group of genetically heterogeneous disorders characterized by progressive spasticity of the lower limbs. Mutations in the SPG4 gene, which encodes spastin protein, are responsible for up to 45% of autosomal dominant cases., Objective: To search for disease-causing mutations in a large series of Italian patients with HSP., Design: Samples of DNA were analyzed by direct sequencing of all exons in SPG4. Samples from a subset of patients were also analyzed by direct sequencing of all exons in SPG3A, SPG6, SPG10, and SPG13., Setting: Molecular testing facility in Italy., Patients: Sixty unrelated Italian patients with pure (n = 50) and complicated (n = 10) HSP., Main Outcome Measures: Mutations in SPG4, SPG3A, SPG6, SPG10, and SPG13., Results: We identified 12 different mutations, 8 of which were novel, in 13 patients. No mutations of any of the other HSP genes tested were found in 15 patients with sporadic pure HSP who did not have mutations in the SPG4 gene., Conclusions: The overall rate of mutation in the SPG4 gene within our sample was 22%, rising to 26% when only patients with pure HSP were considered. The negative result obtained in 15 patients without mutations in SPG4 in whom 4 other genes were analyzed (SPG3A, SPG6, SPG10, and SPG13) indicate that these genes are not frequently mutated in sporadic pure HSP.
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- 2006
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48. Functional analysis of novel KCNQ2 and KCNQ3 gene variants found in a large pedigree with benign familial neonatal convulsions (BFNC).
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Bassi MT, Balottin U, Panzeri C, Piccinelli P, Castaldo P, Barrese V, Soldovieri MV, Miceli F, Colombo M, Bresolin N, Borgatti R, and Taglialatela M
- Subjects
- Animals, Base Sequence, CHO Cells, Cricetinae, Family Health, Female, Humans, Male, Molecular Sequence Data, Mutation, Pedigree, Epilepsy, Benign Neonatal genetics, Genetic Variation, KCNQ2 Potassium Channel genetics, KCNQ3 Potassium Channel genetics
- Abstract
Benign familial neonatal convulsion (BFNC) is a rare autosomal dominant disorder caused by mutations in KCNQ2 and KCNQ3, two genes encoding for potassium channel subunits. A large family with nine members affected by BFNC is described in the present study. All affected members of this family carry a novel deletion/insertion mutation in the KCNQ2 gene (c.761_770del10insA), which determines a premature truncation of the protein. In addition, in the family of the proposita's father, a novel sequence variant (c.2687A>G) in KCNQ3 leading to the p.N821S amino acid change was detected. When heterologously expressed in Chinese hamster ovary cells, KCNQ2 subunits carrying the mutation failed to form functional potassium channels in homomeric configuration and did not affect channels formed by KCNQ2 and/or KCNQ3 subunits. On the other hand, homomeric and heteromeric potassium channels formed by KCNQ3 subunits carrying the p.N821S variant were indistinguishable from those formed by wild-type KCNQ3 subunits. Finally, the current density of the cells mimicking the double heterozygotic condition for both KCNQ2 and KCNQ3 alleles of the proband was decreased by approximately 25% when compared to cells expressing only wild-type alleles. Collectively, these results suggest that, in the family investigated, the KCNQ2 mutation is responsible for the BFNC phenotype, possibly because of haplo-insufficiency, whereas the KCNQ3 variant is functionally silent, a result compatible with its lack of segregation with the BFNC phenotype.
- Published
- 2005
- Full Text
- View/download PDF
49. Expression of CD4 on human peripheral blood neutrophils.
- Author
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Biswas P, Mantelli B, Sica A, Malnati M, Panzeri C, Saccani A, Hasson H, Vecchi A, Saniabadi A, Lusso P, Lazzarin A, and Beretta A
- Subjects
- Blood Cells, CD4 Antigens genetics, CD4 Antigens metabolism, Case-Control Studies, Flow Cytometry, HIV Envelope Protein gp120 metabolism, HIV Infections immunology, Humans, Immunophenotyping, Leukocytes, Mononuclear immunology, RNA, Messenger analysis, CD4 Antigens analysis, HIV Infections pathology, Neutrophils immunology
- Abstract
CD4, the primary receptor for entry of HIV, is known to be expressed on T cells and monocytes/macrophages; healthy natural killer (NK) lymphocytes; in vitro human herpesvirus 6 (HHV6)-infected CD8+, NK, and gammadelta T lymphocytes; CD34+ progenitor cells; and a subset of eosinophils and basophils. We here report the unconventional expression of CD4 at the surface of peripheral blood neutrophils derived from 4 of 51 (7.8%) HIV-1-infected and 3 of 25 (12%) uninfected donors, with similar frequency within the 2 groups. The percentage of CD4+ neutrophils ranged from 39% to 97% of the total neutrophil population. Both surface and cytoplasmic forms of CD4 were present in neutrophils. Quantitative RNA polymerase chain reaction (PCR) revealed that neutrophils contain levels of CD4 mRNA comparable to those of peripheral blood mononuclear cells derived from the same donor. The conformation of CD4 expressed at the surface of neutrophils was similar to that of CD4 expressed on T lymphocytes as determined by the binding of monoclonal antibodies specific for conformational epitopes and the binding of recombinant HIV-1 gp120. Thus, our data provide evidence that neutrophils express endogenous CD4 and bind HIV. Owing to their abundance in peripheral blood, CD4+ neutrophils may influence significantly the biodistribution of HIV delivering it to sites of inflammation or to additional tissue reservoirs.
- Published
- 2003
- Full Text
- View/download PDF
50. Age-related differences in patients admitted to a palliative home care service.
- Author
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De Conno F, Boffi R, Brunelli C, and Panzeri C
- Subjects
- Age Factors, Aged, Aged, 80 and over, Eligibility Determination, Female, Humans, Male, Middle Aged, Prospective Studies, Survival Analysis, Health Services Accessibility, Neoplasms therapy, Palliative Care, Terminal Care
- Abstract
Aims: The aim of the study was to investigate possible differences in access to the service, symptomatology and therapy in relation to age among terminal cancer patients admitted to a home care program. We examined prospectively all 116 terminal cancer patients enrolled in a home care program in 1998, comparing those up to 70 years of age (48 patients) with those above 70 (68 patients). We also compared the age-related characteristics of this population with those of all 348 patients enrolled in the program in 1989-1991. There were no significant differences between the two age groups of the 1998 population in terms of symptoms, tumor site or medication, although NSAID use tended to be greater in older patients, and opioid and anti-emetic use greater in younger patients. Patients up to 70 years of age had significantly shorter survival from admission to home care than those over 70, and a greater proportion had metastases. There were no such significant age-related differences as regards survival and the presence of metastases in patients enrolled 10 years before. In conclusion, among terminally ill cancer patients referred to a palliative home care service in Milan, mostly treated at the National Cancer Institute, the 10-year admission trend showed that palliative care is made available increasingly later, particularly to those up to 70 years of age, in contrast to current recommendations.
- Published
- 2002
- Full Text
- View/download PDF
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