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Passerini L, Amodio G, Bassi V, Vitale S, Mottola I, Di Stefano M, Fanti L, Sgaramella P, Ziparo C, Furio S, Auricchio R, Barera G, Di Nardo G, Troncone R, Gianfrani C, Gregori S. IL-10-producing regulatory cells impact on celiac disease evolution. Clin Immunol 2024; 260:109923. [PMID: 38316201 PMCID: PMC10905269 DOI: 10.1016/j.clim.2024.109923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 01/19/2024] [Accepted: 02/01/2024] [Indexed: 02/07/2024]
Abstract
Celiac Disease (CD) is a T-cell mediated disorder caused by immune response to gluten, although the mechanisms underlying CD progression are still elusive. We analyzed immune cell composition, plasma cytokines, and gliadin-specific T-cell responses in patients with positive serology and normal intestinal mucosa (potential-CD) or villous atrophy (acute-CD), and after gluten-free diet (GFD). We found: an inflammatory signature and the presence of circulating gliadin-specific IFN-γ+ T cells in CD patients regardless of mucosal damage; an increased frequency of IL-10-secreting dendritic cells (DC-10) in the gut and of circulating gliadin-specific IL-10-secreting T cells in potential-CD; IL-10 inhibition increased IFN-γ secretion by gliadin-specific intestinal T cells from acute- and potential-CD. On GFD, inflammatory cytokines normalized, while IL-10-producing T cells accumulated in the gut. We show that IL-10-producing cells are fundamental in controlling pathological T-cell responses to gluten: DC-10 protect the intestinal mucosa from damage and represent a marker of potential-CD.
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Affiliation(s)
- Laura Passerini
- Mechanisms of Peripheral Tolerance Unit, San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), IRCCS San Raffaele Scientific Institute, Via Olgettina 60, Milan 20132, Italy
| | - Giada Amodio
- Mechanisms of Peripheral Tolerance Unit, San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), IRCCS San Raffaele Scientific Institute, Via Olgettina 60, Milan 20132, Italy
| | - Virginia Bassi
- Mechanisms of Peripheral Tolerance Unit, San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), IRCCS San Raffaele Scientific Institute, Via Olgettina 60, Milan 20132, Italy
| | - Serena Vitale
- Institute of Biochemistry and Cell Biology, CNR, Via P. Castellino 111, Naples 80131, Italy
| | - Ilaria Mottola
- Institute of Biochemistry and Cell Biology, CNR, Via P. Castellino 111, Naples 80131, Italy
| | - Marina Di Stefano
- Department of Paediatrics, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, Milan 20132, Italy
| | - Lorella Fanti
- Gastroenterology and Gastrointestinal Endoscopy Unit, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, Milan 20132, Italy
| | - Paola Sgaramella
- Department of Paediatrics, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, Milan 20132, Italy
| | - Chiara Ziparo
- NESMOS Department, School of Medicine and Psychology, Sapienza University of Rome, Sant' Andrea University Hospital, Via di Grottarossa 1035, Rome 00189, Italy
| | - Silvia Furio
- NESMOS Department, School of Medicine and Psychology, Sapienza University of Rome, Sant' Andrea University Hospital, Via di Grottarossa 1035, Rome 00189, Italy
| | - Renata Auricchio
- European Laboratory for the Investigation of Food Induced Diseases (ELFID), Department of Translational Medical Science, Section of Pediatrics, Via Pansini 5, University Federico II, Naples 80131, Italy
| | - Graziano Barera
- Department of Paediatrics, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, Milan 20132, Italy
| | - Giovanni Di Nardo
- NESMOS Department, School of Medicine and Psychology, Sapienza University of Rome, Sant' Andrea University Hospital, Via di Grottarossa 1035, Rome 00189, Italy
| | - Riccardo Troncone
- European Laboratory for the Investigation of Food Induced Diseases (ELFID), Department of Translational Medical Science, Section of Pediatrics, Via Pansini 5, University Federico II, Naples 80131, Italy
| | - Carmen Gianfrani
- Institute of Biochemistry and Cell Biology, CNR, Via P. Castellino 111, Naples 80131, Italy
| | - Silvia Gregori
- Mechanisms of Peripheral Tolerance Unit, San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), IRCCS San Raffaele Scientific Institute, Via Olgettina 60, Milan 20132, Italy.
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Passeri L, Andolfi G, Bassi V, Russo F, Giacomini G, Laudisa C, Marrocco I, Cesana L, Di Stefano M, Fanti L, Sgaramella P, Vitale S, Ziparo C, Auricchio R, Barera G, Di Nardo G, Troncone R, Gianfrani C, Annoni A, Passerini L, Gregori S. Tolerogenic IL-10-engineered dendritic cell-based therapy to restore antigen-specific tolerance in T cell mediated diseases. J Autoimmun 2023; 138:103051. [PMID: 37224733 DOI: 10.1016/j.jaut.2023.103051] [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: 09/09/2022] [Revised: 02/06/2023] [Accepted: 04/21/2023] [Indexed: 05/26/2023]
Abstract
Tolerogenic dendritic cells play a critical role in promoting antigen-specific tolerance via dampening of T cell responses, induction of pathogenic T cell exhaustion and antigen-specific regulatory T cells. Here we efficiently generate tolerogenic dendritic cells by genetic engineering of monocytes with lentiviral vectors co-encoding for immunodominant antigen-derived peptides and IL-10. These transduced dendritic cells (designated DCIL-10/Ag) secrete IL-10 and efficiently downregulate antigen-specific CD4+ and CD8+ T cell responses from healthy subjects and celiac disease patients in vitro. In addition, DCIL-10/Ag induce antigen-specific CD49b+LAG-3+ T cells, which display the T regulatory type 1 (Tr1) cell gene signature. Administration of DCIL-10/Ag resulted in the induction of antigen-specific Tr1 cells in chimeric transplanted mice and the prevention of type 1 diabetes in pre-clinical disease models. Subsequent transfer of these antigen-specific T cells completely prevented type 1 diabetes development. Collectively these data indicate that DCIL-10/Ag represent a platform to induce stable antigen-specific tolerance to control T-cell mediated diseases.
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Affiliation(s)
- Laura Passeri
- Mechanisms of Peripheral Tolerance Unit, San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Grazia Andolfi
- Mechanisms of Peripheral Tolerance Unit, San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Virginia Bassi
- Mechanisms of Peripheral Tolerance Unit, San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy; University of Rome Tor Vergata, Via Cracovia 50, 00133, Rome, Italy
| | - Fabio Russo
- Mechanisms of Peripheral Tolerance Unit, San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Giorgia Giacomini
- Mechanisms of Peripheral Tolerance Unit, San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Cecilia Laudisa
- Mechanisms of Peripheral Tolerance Unit, San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Ilaria Marrocco
- Mechanisms of Peripheral Tolerance Unit, San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Luca Cesana
- Mechanisms of Peripheral Tolerance Unit, San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Marina Di Stefano
- Department of Paediatrics, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Lorella Fanti
- Gastroenterology and Gastrointestinal Endoscopy Unit, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Paola Sgaramella
- Department of Paediatrics, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Serena Vitale
- Institute of Biochemistry and Cell Biology, CNR, via P.Castellino 11, 80131, Naples, Italy
| | - Chiara Ziparo
- NESMOS Department, School of Medicine and Psychology, Sapienza University of Rome, Sant'Andrea University Hospital, Via di Grottarossa 1035, 00189, Rome, Italy
| | - Renata Auricchio
- European Laboratory for the Investigation of Food Induced Diseases (ELFID), Department of Translational Medical Science, Section of Pediatrics, Via Pansini 5, 80131, University Federico II, Naples, Italy
| | - Graziano Barera
- Department of Paediatrics, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Giovanni Di Nardo
- NESMOS Department, School of Medicine and Psychology, Sapienza University of Rome, Sant'Andrea University Hospital, Via di Grottarossa 1035, 00189, Rome, Italy
| | - Riccardo Troncone
- European Laboratory for the Investigation of Food Induced Diseases (ELFID), Department of Translational Medical Science, Section of Pediatrics, Via Pansini 5, 80131, University Federico II, Naples, Italy
| | - Carmen Gianfrani
- Institute of Biochemistry and Cell Biology, CNR, via P.Castellino 11, 80131, Naples, Italy
| | - Andrea Annoni
- Mechanisms of Peripheral Tolerance Unit, San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Laura Passerini
- Mechanisms of Peripheral Tolerance Unit, San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Silvia Gregori
- Mechanisms of Peripheral Tolerance Unit, San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy.
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Di Nardo G, Cremon C, Staiano A, Stanghellini V, Borrelli O, Strisciuglio C, Romano C, Mallardo S, Scarpato E, Marasco G, Salvatore S, Zenzeri L, Felici E, Pensabene L, Sestito S, Francavilla R, Quitadamo P, Baldassarre M, Giorgio V, Tambucci R, Ziparo C, Parisi P, Barbaro MR, Barbara G. Role of inflammation in pediatric irritable bowel syndrome. Neurogastroenterol Motil 2023; 35:e14365. [PMID: 35340083 DOI: 10.1111/nmo.14365] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 02/09/2022] [Accepted: 03/15/2022] [Indexed: 12/14/2022]
Abstract
BACKGROUND IBS affects a large number of children throughout the world and is thought to be the result of disturbed neuroimmune function along with the brain-gut axis. Although the underlying pathophysiologic mechanisms are not clear, the role of low-grade inflammation and mucosal immune activation in IBS symptom generation has become evident also in subsets of pediatric patients. Animal models provided meaningful insight in the causal relationship between abnormal mucosal immune activation and changes in gastrointestinal (GI) sensory-motor function. Likewise, the development of long-standing GI symptoms fulfilling the current criteria for functional GI disorders after infection gastroenteritis and in patients with IBD or celiac disease in remission further supports this hypothesis. Immune activation, its impact on gut sensory-motor function, and potential implications for symptom generation emerged in both children and adults with IBS. PURPOSE The aim of this review is to summarize the main evidence on the presence of low-grade inflammation and immune activation in children with IBS, its possible role in symptom generation, and its potential implication for new therapeutic strategies.
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Affiliation(s)
- Giovanni Di Nardo
- NESMOS Department, Faculty of Medicine and Psychology, Sant'Andrea University Hospital, Sapienza University of Rome, Rome, Italy
| | - Cesare Cremon
- Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | - Annamaria Staiano
- Department of Translational Medical Science, "Federico II", University of Naples, Naples, Italy
| | | | - Osvaldo Borrelli
- Division of Neurogastroenterology and Motility, Department of Paediatric Gastroenterology, UCL Institute of Child Health and Great Ormond Street Hospital, London, UK
| | - Caterina Strisciuglio
- Department of Woman, Child and General and Specialistic Surgery, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Claudio Romano
- Pediatric Gastroenterology Unit, Department of Human Pathology in Adulthood and Childhood "G. Barresi", University of Messina, Messina, Italy
| | - Saverio Mallardo
- Pediatric Department, Santa Maria Goretti Hospital, Sapienza University of Rome, Latina, Italy
| | - Elena Scarpato
- Department of Translational Medical Science, "Federico II", University of Naples, Naples, Italy
| | - Giovanni Marasco
- Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | - Silvia Salvatore
- Pediatric Department, Ospedale "F. Del Ponte", University of Insubria, Varese, Italy
| | - Letizia Zenzeri
- NESMOS Department, Faculty of Medicine and Psychology, Sant'Andrea University Hospital, Sapienza University of Rome, Rome, Italy.,Pediatric Emergency Unit, Santobono-Pausilipon Children's Hospital, Naples, Italy
| | - Enrico Felici
- Pediatric and Pediatric Emergency Unit, "Umberto Bosio" Center for Digestive Diseases, The Children Hospital, AO SS Antonio e Biagio e Cesare Arrigo, Alessandria, Italy
| | - Licia Pensabene
- Department of Medical and Surgical Sciences, Pediatric Unit, University "Magna Graecia" of Catanzaro, Catanzaro, Italy
| | - Simona Sestito
- Department of Medical and Surgical Sciences, Pediatric Unit, University "Magna Graecia" of Catanzaro, Catanzaro, Italy
| | - Ruggiero Francavilla
- Pediatric Section, Department of Interdisciplinary Medicine, University of Bari "Aldo Moro", Bari, Italy
| | - Paolo Quitadamo
- Department of Pediatrics, A.O.R.N. Santobono-Pausilipon, Naples, Italy
| | - Mariella Baldassarre
- Neonatology and Neonatal Intensive Care Unit, Department of Biomedical Science and Human Oncology, University of Bari "Aldo Moro", Bari, Italy
| | | | - Renato Tambucci
- Digestive Endoscopy and Surgery Unit, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Chiara Ziparo
- NESMOS Department, Faculty of Medicine and Psychology, Sant'Andrea University Hospital, Sapienza University of Rome, Rome, Italy
| | - Pasquale Parisi
- NESMOS Department, Faculty of Medicine and Psychology, Sant'Andrea University Hospital, Sapienza University of Rome, Rome, Italy
| | | | - Giovanni Barbara
- Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
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Di Nardo G, Di Serafino M, Gaglione G, Mercogliano C, Masoni L, Villa MP, Parisi P, Ziparo C, Vassallo F, Evangelisti M, Vallone G, Esposito F. Omental Infarction: An Underrecognized Cause of Right-Sided Acute Abdominal Pain in Children. Pediatr Emerg Care 2021; 37:e1555-e1559. [PMID: 33170567 DOI: 10.1097/pec.0000000000002114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
OBJECTIVE To evaluate the prevalence of omental infarction (OI) in children with suspected appendicitis, the role of ultrasonography (US) in its diagnosis and management and the efficacy of conservative management. METHODS Consecutive children with suspected acute appendicitis were prospectively enrolled. Ultrasonography was performed at baseline, during follow-up, before the discharge, and at 15-day intervals until US findings of OI disappeared. All children with a diagnosis of OI were treated conservatively. RESULTS One hundred ninety-nine children (91 male; age range, 3-15 years) were evaluated. Eighty-four patients had acute appendicitis. Omental infarctions were found in 14 children (8 male; mean age, 9.8 ± 2.6 years), with an incidence of 7%. Ultrasonography depicted an echogenic mass consistent with OI in all children. Ultrasonography detected in 8 patients a normal-looking appendix, whereas in other 6 patients, it identified neither appendix nor indirect signs of acute appendicitis. A normal appendix has been detected by US during follow-up in 2 of these 6 patients. During follow-up, US finding of OI disappeared in all cases and no signs of acute appendicitis or other disease occurred. All 14 OIs were treated conservatively, with no reported complications. CONCLUSIONS Omental infarction is an underestimated cause of abdominal pain in children accounting for 7% of patients with suspected appendicitis. Ultrasonography is a useful method for the diagnoses and to guide clinical management of OI. Conservative therapy is a safe option for the management of OI.
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Affiliation(s)
- Giovanni Di Nardo
- From the NESMOS Department, School of Medicine and Psychology, Sapienza University of Rome, Sant'Andrea University Hospital, Rome
| | | | | | - Carmela Mercogliano
- Pediatric Gastroenterology Units, Santobono-Pausilipon Children Hospital, Naples
| | - Luigi Masoni
- General Surgery Unit, Sapienza University of Rome, Sant'Andrea University Hospital, Rome
| | - Maria Pia Villa
- From the NESMOS Department, School of Medicine and Psychology, Sapienza University of Rome, Sant'Andrea University Hospital, Rome
| | - Pasquale Parisi
- From the NESMOS Department, School of Medicine and Psychology, Sapienza University of Rome, Sant'Andrea University Hospital, Rome
| | - Chiara Ziparo
- From the NESMOS Department, School of Medicine and Psychology, Sapienza University of Rome, Sant'Andrea University Hospital, Rome
| | - Francesca Vassallo
- From the NESMOS Department, School of Medicine and Psychology, Sapienza University of Rome, Sant'Andrea University Hospital, Rome
| | - Melania Evangelisti
- From the NESMOS Department, School of Medicine and Psychology, Sapienza University of Rome, Sant'Andrea University Hospital, Rome
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Persechino F, Galli G, Persechino S, Valitutti F, Zenzeri L, Mauro A, Corleto VD, Parisi P, Ziparo C, Evangelisti M, Quatrale G, Di Nardo G. Skin Manifestations and Coeliac Disease in Paediatric Population. Nutrients 2021; 13:3611. [PMID: 34684612 PMCID: PMC8537533 DOI: 10.3390/nu13103611] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 10/12/2021] [Accepted: 10/13/2021] [Indexed: 12/16/2022] Open
Abstract
Celiac disease (CD) is an immune-mediated enteropathy caused by gluten ingestion, affecting approximately 1% of the worldwide population. Extraintestinal symptoms may be present as the first signs of CD, years before the CD diagnosis is made. A great variety of extraintestinal manifestations may be associated with CD. Cutaneous manifestations represent the main extraintestinal manifestations, with dermatitis herpetiformis being the most common in patients with CD. In adults, it has been demonstrated that the role of a gluten-free diet is crucial not only for the recovery of signs and symptoms associated with CD but also for cutaneous manifestations, which often improve after gluten avoidance. In children with CD, the association with skin disorders is well documented regarding dermatitis herpetiformis, but studies considering other dermatological conditions, such as psoriasis and atopic dermatitis, are few. The prevalence and manifestations of dermatological disorders in celiac children are often different from those in adults, explaining the gap between these populations. In addition, the therapeutic role of a gluten-free diet in the improvement in skin alterations is not fully understood in children and in adult population except for dermatitis herpetiformis. Therefore, cutaneous CD symptoms need to be known and recognized by physicians despite their specialties to improve early CD diagnosis, which is critical for a better prognosis. This review describes the current scientific evidence on skin manifestations associated with CD in the pediatric population.
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Affiliation(s)
- Flavia Persechino
- Department of Clinical and Molecular Medicine, Sapienza University of Rome, 00185 Rome, Italy;
| | - Gloria Galli
- Department of Medical-Surgical and Translational Medicine, Sant’Andrea University Hospital, Sapienza University of Rome, 00185 Rome, Italy; (G.G.); (V.D.C.)
| | - Severino Persechino
- Dermatology Unit, NESMOS Department, Faculty of Medicine & Psychology, Sapienza University of Rome, Sant’Andrea University Hospital, 00185 Rome, Italy;
| | - Francesco Valitutti
- Pediatric Unit, AOU San Giovanni di Dio e Ruggi D’Aragona, Salerno, Italy and EBRIS (European Biomedical Research Institute of Salerno), 84121 Salerno, Italy;
| | - Letizia Zenzeri
- Pediatric Emergency Unit, Emergency Pediatric Department, AORN Santobono-Pausilipon Children’s Hospital, 80129 Naples, Italy; (L.Z.); (A.M.)
- Pediatric Unit, NESMOS Department, Faculty of Medicine & Psychology, Sapienza University of Rome, Sant’Andrea University Hospital, 00185 Rome, Italy; (P.P.); (C.Z.); (M.E.); (G.Q.)
| | - Angela Mauro
- Pediatric Emergency Unit, Emergency Pediatric Department, AORN Santobono-Pausilipon Children’s Hospital, 80129 Naples, Italy; (L.Z.); (A.M.)
| | - Vito Domenico Corleto
- Department of Medical-Surgical and Translational Medicine, Sant’Andrea University Hospital, Sapienza University of Rome, 00185 Rome, Italy; (G.G.); (V.D.C.)
| | - Pasquale Parisi
- Pediatric Unit, NESMOS Department, Faculty of Medicine & Psychology, Sapienza University of Rome, Sant’Andrea University Hospital, 00185 Rome, Italy; (P.P.); (C.Z.); (M.E.); (G.Q.)
| | - Chiara Ziparo
- Pediatric Unit, NESMOS Department, Faculty of Medicine & Psychology, Sapienza University of Rome, Sant’Andrea University Hospital, 00185 Rome, Italy; (P.P.); (C.Z.); (M.E.); (G.Q.)
| | - Melania Evangelisti
- Pediatric Unit, NESMOS Department, Faculty of Medicine & Psychology, Sapienza University of Rome, Sant’Andrea University Hospital, 00185 Rome, Italy; (P.P.); (C.Z.); (M.E.); (G.Q.)
| | - Giovanna Quatrale
- Pediatric Unit, NESMOS Department, Faculty of Medicine & Psychology, Sapienza University of Rome, Sant’Andrea University Hospital, 00185 Rome, Italy; (P.P.); (C.Z.); (M.E.); (G.Q.)
| | - Giovanni Di Nardo
- Pediatric Unit, NESMOS Department, Faculty of Medicine & Psychology, Sapienza University of Rome, Sant’Andrea University Hospital, 00185 Rome, Italy; (P.P.); (C.Z.); (M.E.); (G.Q.)
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Quitadamo P, Anselmi F, Caldore M, Caruso F, Bucci C, Monaco C, Tipo E, Gaglione G, Illiceto MT, Esposito F, Dolce P, Ziparo C, Di Nardo G. Foreign body ingestion in children: Beware of disk batteries and multiple magnets. Acta Paediatr 2021; 110:2862-2864. [PMID: 34048089 DOI: 10.1111/apa.15957] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 05/18/2021] [Accepted: 05/25/2021] [Indexed: 01/16/2023]
Affiliation(s)
- Paolo Quitadamo
- Pediatric Gastroenterology Unit Santobono‐Pausilipon Children’s Hospital Naples Italy
| | - Federica Anselmi
- Department of Translational Medical Science (Section of Pediatrics) University "Federico II" Naples Italy
| | - Mariano Caldore
- Pediatric Gastroenterology Unit Santobono‐Pausilipon Children’s Hospital Naples Italy
| | - Flora Caruso
- Pediatric Gastroenterology Unit Santobono‐Pausilipon Children’s Hospital Naples Italy
| | - Cristina Bucci
- Pediatric Gastroenterology Unit Santobono‐Pausilipon Children’s Hospital Naples Italy
| | - Casimiro Monaco
- Pediatric Surgery Unit Santobono‐Pausilipon Children's Hospital Naples Italy
| | - Enzo Tipo
- Emergency Pediatric Department Santobono‐Pausilipon Children's Hospital Naples Italy
| | - Giovanni Gaglione
- Pediatric Surgery Unit Santobono‐Pausilipon Children's Hospital Naples Italy
| | - Maria Teresa Illiceto
- Pediatric Gastroenterology and Endoscopic Unit "Santo Spirito" Hospital Pescara Italy
| | - Francesco Esposito
- Department of Emergency Radiology Santobono‐Pausilipon Children's Hospital Naples Italy
| | - Pasquale Dolce
- Department of Public Health University of Naples Federico II Naples Italy
| | - Chiara Ziparo
- NESMOS Department Chair of Pediatrics Faculty of Medicine and Psychology Sapienza University of Rome Sant'Andrea University Hospital Rome Italy
| | - Giovanni Di Nardo
- NESMOS Department Chair of Pediatrics Faculty of Medicine and Psychology Sapienza University of Rome Sant'Andrea University Hospital Rome Italy
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7
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Mauro A, Zenzeri L, Esposito F, Gaglione G, Strisciuglio C, Pilozzi E, Corleto VD, Ziparo C, Di Nardo G. Isolated intestinal Ganglioneuromatosis: case report and literature review. Ital J Pediatr 2021; 47:80. [PMID: 33785023 PMCID: PMC8008650 DOI: 10.1186/s13052-021-01024-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 03/15/2021] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Intestinal Ganglioneuromatosis (IG) is a rare disorder of the enteric nervous system. In pediatric age it is often associated with genetic syndromes such as Neurofibromatosis 1 (NF1), multiple endocrine neoplasia type 2B (MEN2B) and Cowden syndrome (PTEN mutation), and ganglioneuromas (GNs) may be sometimes the first sign of the disease. Isolated GNs are rare and sporadic. Clinical symptom vary and depend on the size and on the location of the GNs. This disorder affects intestinal motility and it, consequently, causes changes in bowel habits, abdominal pain, occlusive symptoms and rarely lower gastrointestinal bleeding secondary to ulceration of the intestinal mucosa. On the other hand, patients can remain asymptomatic for many years. CASE PRESENTATION We describe a 9-year-old boy referred to our emergency department for right lower quadrant abdominal pain. No familial history for gastrointestinal disorders. No history of fever or weight loss. At physical examination, he had diffused abdominal pain. Abdominal ultrasonography showed a hypoechoic formation measuring 41.8 mm by 35 mm in the right lower quadrant of the abdomen. Routine blood tests were normal, but fecal occult blood test was positive. Abdominal TC confirmed the hypodense formation, of about 5 cm in transverse diameter, in the right hypochondrium that apparently invaginated in the caecum-last ileal loop. Colonoscopy showed in the cecum an invaginated polypoid lesion of the terminal ileal loop. Laparoscopic resection of the polypoid lesion was performed. Histological diagnosis of the large neoplasm observed in the terminal ileum was diffuse ganglioneuromatosis. NF1, RET and PTEN gene tests resulted negative for specific mutations. At the 1 year follow-up, the patient presented good general condition and blood tests, fecal occult blood test, esophagogastroduodenoscopy, colonoscopy and MR-enterography were negative. CONCLUSIONS Only few cases are reported in literature of IG in pediatric age. Although rare, the present case suggests that this disorder must be taken in consideration in every patient with GI symptoms such as abdominal pain, constipation, lower intestinal bleeding, in order to avoid a delayed diagnosis.
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Affiliation(s)
- Angela Mauro
- Pediatric Emergency Unit, AORN Santobono-Pausilipon, Naples, Italy
| | - Letizia Zenzeri
- Pediatric Emergency Unit, AORN Santobono-Pausilipon, Naples, Italy
| | - Francesco Esposito
- Department of Emergency Radiology, AORN Santobono-Pausilipon, Naples, Italy
| | | | - Caterina Strisciuglio
- Department of Woman, Child and General and Specialistic Surgery, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Emanuela Pilozzi
- Department of Clinical and Molecular Medicine, UOC Anatomia Patologica, Sant' Andrea Hospital, University "La Sapienza", Rome, Italy
| | - Vito Domenico Corleto
- Department of Medical-Surgical Sciences and Translational Medicine, Sant'Andrea Hospital, Sapienza University of Rome, Rome, Italy
| | - Chiara Ziparo
- NESMOS Department, Faculty of Medicine and Psychology, Sapienza University of Rome, Pediatric Unit, Sant'Andrea University Hospital, Rome, Italy
| | - Giovanni Di Nardo
- NESMOS Department, Faculty of Medicine and Psychology, Sapienza University of Rome, Pediatric Unit, Sant'Andrea University Hospital, Rome, Italy.
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Esposito F, Di Serafino M, Mauro A, Mercogliano C, Cocco C, Zenzeri L, Ferrara D, Iacobellis F, Evangelisti M, Ziparo C, Di Nardo G. Not only fat: omental infarction and its mimics in children. Clinical and ultrasound findings: a pictorial review. J Ultrasound 2020; 23:621-629. [PMID: 32623635 PMCID: PMC7588577 DOI: 10.1007/s40477-020-00492-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 06/09/2020] [Indexed: 11/30/2022] Open
Abstract
Acute abdominal pain in children is the most common cause of emergency department admissions. Omental infarction is a rare cause of acute abdominal pain in this age group, accounting for approximately 15% of cases in children and 0.024-0.1% of cases of surgery for suspected appendicitis at the same age. Its clinical presentation may mimic similar diseases such as acute appendicitis, epiploic appendagitis, and mesenteric panniculitis. Ultrasound is the modality of choice for the initial evaluation of acute abdominal pain in pediatric patients and it can be used with confidence in the diagnosis and management of omental infarction in children. In this brief review, we focus on the main ultrasound findings and their diagnostic clue for omental infarction and its mimics.
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Affiliation(s)
- Francesco Esposito
- Department of Emergency Radiology, "Santobono-Pausilipon" Children's Hospital, Naples, Italy
| | - Marco Di Serafino
- Department of General and Emergency Radiology, "Antonio Cardarelli" Hospital, Antonio Cardarelli st 9, 80131, Naples, Italy.
| | - Angela Mauro
- Department of Pediatric Emergency, "Santobono-Pausilipon" Children's Hospital, Naples, Italy
| | - Carmela Mercogliano
- Department of Pediatric 2nd Unit, "Santobono-Pausilipon" Children's Hospital, Naples, Italy
| | - Chiara Cocco
- Chair of Pediatrics, NESMOS Department, Faculty of Medicine and Psychology, "Sapienza" University of Rome, "Sant'Andrea" University Hospital, Rome, Italy
| | - Letizia Zenzeri
- Department of Pediatric Emergency, "Santobono-Pausilipon" Children's Hospital, Naples, Italy
| | - Dolores Ferrara
- Department of Emergency Radiology, "Santobono-Pausilipon" Children's Hospital, Naples, Italy
| | - Francesca Iacobellis
- Department of General and Emergency Radiology, "Antonio Cardarelli" Hospital, Antonio Cardarelli st 9, 80131, Naples, Italy
| | - Melania Evangelisti
- Chair of Pediatrics, NESMOS Department, Faculty of Medicine and Psychology, "Sapienza" University of Rome, "Sant'Andrea" University Hospital, Rome, Italy
| | - Chiara Ziparo
- Chair of Pediatrics, NESMOS Department, Faculty of Medicine and Psychology, "Sapienza" University of Rome, "Sant'Andrea" University Hospital, Rome, Italy
| | - Giovanni Di Nardo
- Chair of Pediatrics, NESMOS Department, Faculty of Medicine and Psychology, "Sapienza" University of Rome, "Sant'Andrea" University Hospital, Rome, Italy
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9
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Nardo GD, Esposito G, Ziparo C, Micheli F, Masoni L, Villa MP, Parisi P, Manca MB, Baccini F, Corleto VD. Enteroscopy in children and adults with inflammatory bowel disease. World J Gastroenterol 2020; 26:5944-5958. [PMID: 33132646 PMCID: PMC7584063 DOI: 10.3748/wjg.v26.i39.5944] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 08/08/2020] [Accepted: 09/25/2020] [Indexed: 02/06/2023] Open
Abstract
Inflammatory bowel disease (IBD) includes Crohn’s disease (CD), ulcerative colitis and unclassified entities. CD commonly involves the terminal ileum and colon but at the time of diagnosis it can be confined to the small bowel (SB) in about 30% of the patients, especially in the young ones. Management of isolated SB-CD can be challenging and objective evaluation of the SB mucosa is essential in differentiating CD from other enteropathies to achieve therapeutic decisions and to plan the follow-up. The introduction of cross-sectional imaging techniques and capsule endoscopy (CE) have significantly expanded the ability to diagnose SB diseases providing a non-invasive test for the visualization of the entire SB mucosa. The main CE limitations are the low specificity, the lack of therapeutic capabilities and the impossibility to take biopsies. Device assisted enteroscopy (DAE) enables histological confirmation when traditional endoscopy, capsule endoscopy and cross-sectional imaging are inconclusive and also allows therapeutic interventions such as balloon stricture dilation, intralesional steroid injection, capsule retrieval and more recently stent insertion. In the current review we will discuss technical aspect, indications and safety profile of DAE in children and adults with IBD.
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Affiliation(s)
- Giovanni Di Nardo
- Chair of Pediatrics, Pediatric Gastroenterology and Endoscopy Unit, NESMOS Department, Faculty of Medicine and Psychology, Sapienza University of Rome, Sant’ Andrea University Hospital, Rome 00189, Lazio, Italy
| | - Gianluca Esposito
- Department of Medical-Surgical Sciences and Translational Medicine, Sant’ Andrea Hospital, Sapienza University of Rome, Rome 00189, Lazio, Italy
| | - Chiara Ziparo
- Chair of Pediatrics, Pediatric Gastroenterology and Endoscopy Unit, NESMOS Department, Faculty of Medicine and Psychology, Sapienza University of Rome, Sant’ Andrea University Hospital, Rome 00189, Lazio, Italy
| | - Federica Micheli
- Department of Medical-Surgical Sciences and Translational Medicine, Sant’ Andrea University Hospital, Sapienza University of Rome, Rome 00189, Lazio, Italy
| | - Luigi Masoni
- Department of Surgery, Sapienza University of Rome, Sant’ Andrea University Hospital, Rome 00189, Lazio, Italy
| | - Maria Pia Villa
- Chair of Pediatrics, Pediatric Gastroenterology and Endoscopy Unit, NESMOS Department, Faculty of Medicine and Psychology, Sapienza University of Rome, Sant’ Andrea University Hospital, Rome 00189, Lazio, Italy
| | - Pasquale Parisi
- Chair of Pediatrics, Pediatric Gastroenterology and Endoscopy Unit, NESMOS Department, Faculty of Medicine and Psychology, Sapienza University of Rome, Sant’ Andrea University Hospital, Rome 00189, Lazio, Italy
| | - Maria Beatrice Manca
- Department of Clinical and Surgical Translational Medicine, Anesthesia and Intensive Care Medicine, Sant'Andrea University Hospital, Sapienza University of Rome 00189, Lazio, Italy
| | - Flavia Baccini
- Department of Medical-Surgical Sciences and Translational Medicine, Sant’ Andrea University Hospital, Sapienza University of Rome, Rome 00189, Lazio, Italy
| | - Vito Domenico Corleto
- Department of Medical-Surgical Sciences and Translational Medicine, Sant’ Andrea University Hospital, Sapienza University of Rome, Rome 00189, Lazio, Italy
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Di Nardo G, Esposito F, Ziparo C, Strisciuglio C, Vassallo F, Di Serafino M, Villa MP, Parisi P, Evangelisti M, Pacchiarotti C, Corleto VD. Faecal calprotectin and ultrasonography as non-invasive screening tools for detecting colorectal polyps in children with sporadic rectal bleeding: a prospective study. Ital J Pediatr 2020; 46:66. [PMID: 32434534 PMCID: PMC7238517 DOI: 10.1186/s13052-020-00828-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 05/06/2020] [Indexed: 02/07/2023] Open
Abstract
Background Colorectal polyps are reported in 6,1% of paediatric colonoscopies and in 12% of those performed for lower gastrointestinal bleeding. Although colonoscopy is widely used in paediatric patients, it requires bowel preparation and general anaesthesia or deep sedation, and in rare cases, it can cause complications. Non-invasive screening techniques able to predict polyps in children with isolated and sporadic rectal bleeding may play a key role in the selection of patients needing colonoscopy. Methods We enrolled all children undergoing colonoscopy for isolated and sporadic rectal bleeding to determine the diagnostic accuracy of faecal calprotectin, ultrasonography (US) and digital rectal examination as diagnostic methods for screening colorectal polyps. Results A total of 26 of 59 enrolled patients (44.1%) had colonic polyps, one patient had multiple polyps, and 23% of children had polyps proximal to the splenic flexure. The diagnostic accuracy of faecal calprotectin for detecting colorectal polyps was 96.6%, with a sensitivity of 100%. False-positive faecal calprotectin was shown in 2 patients with non-steroidal anti-inflammatory drug-related lesions. The diagnostic accuracy of ultrasound was 77.9%. Polyps not seen with ultrasound tended to be relatively smaller (1.5 vs 2.3, p = 0.001) and located in the rectum. The combined use of FC, US and digital rectal examination obtained a specificity and PPV of 100%. Conclusions FC combined with US and digital rectal examination is a good and promising non-invasive screening test for detecting colorectal polyps in children with isolated and sporadic rectal bleeding.
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Affiliation(s)
- Giovanni Di Nardo
- Chair of Pediatrics, NESMOS Department, Sapienza University of Rome, Sant'Andrea University Hospital, Via di Grottarossa 1035-1039, 00189, Rome, Italy.
| | - Francesco Esposito
- Pediatric Radiology Unit, Santobono-Pausilipon Children Hospital, Naples, Italy
| | - Chiara Ziparo
- Chair of Pediatrics, NESMOS Department, Sapienza University of Rome, Sant'Andrea University Hospital, Via di Grottarossa 1035-1039, 00189, Rome, Italy
| | - Caterina Strisciuglio
- Department of Woman, Child and General and Specialistic Surgery, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Francesca Vassallo
- Chair of Pediatrics, NESMOS Department, Sapienza University of Rome, Sant'Andrea University Hospital, Via di Grottarossa 1035-1039, 00189, Rome, Italy
| | - Marco Di Serafino
- General and Emergency Radiology Unit, Antonio Cardarelli Hospital, Naples, Italy
| | - Maria Pia Villa
- Chair of Pediatrics, NESMOS Department, Sapienza University of Rome, Sant'Andrea University Hospital, Via di Grottarossa 1035-1039, 00189, Rome, Italy
| | - Pasquale Parisi
- Chair of Pediatrics, NESMOS Department, Sapienza University of Rome, Sant'Andrea University Hospital, Via di Grottarossa 1035-1039, 00189, Rome, Italy
| | - Melania Evangelisti
- Chair of Pediatrics, NESMOS Department, Sapienza University of Rome, Sant'Andrea University Hospital, Via di Grottarossa 1035-1039, 00189, Rome, Italy
| | - Claudia Pacchiarotti
- Chair of Pediatrics, NESMOS Department, Sapienza University of Rome, Sant'Andrea University Hospital, Via di Grottarossa 1035-1039, 00189, Rome, Italy
| | - Vito Domenico Corleto
- Gastroenterology and Gastrointestinal Endoscopy Unit, Sapienza University of Rome, Sant'Andrea University Hospital, Rome, Italy
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De Matteis A, Pagliaro G, Corleto VD, Pacchiarotti C, Di Giulio E, Villa MP, Parisi P, Vassallo F, Ziparo C, Di Nardo G. Eosinophilic Esophagitis in Children: Clinical Findings and Diagnostic Approach. Curr Pediatr Rev 2020; 16:206-214. [PMID: 31584371 PMCID: PMC8193808 DOI: 10.2174/1573396315666191004110549] [Citation(s) in RCA: 9] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 09/02/2019] [Accepted: 09/02/2019] [Indexed: 02/07/2023]
Abstract
Eosinophilic esophagitis (EoE) is an emerging chronic immune and antigen-mediated clinicopathologic disease. During the last 2 decades, the incidence of this condition in children has increased significantly, thanks to practitioners for creating the awareness and higher use of diagnostic endoscopy. We have analysed paediatric literature on EoE focusing on the epidemiology, pathophysiology, clinical findings and diagnostic approach. EoE is pathogenically related to a Th2 inflammation characterized by a mixed IgE and non-IgEmediated reaction to food and/or environmental agents. This leads to esophageal dysfunction and remodeling accompanied by subepithelial fibrosis. EoE can be presented with several range of gastrointestinal symptoms, including regurgitation, vomiting, feeding difficulties or feeding refusal in infants and toddlers, as well as heartburn, dysphagia and food bolus impaction in older children and adults. The diagnostic suspicion is based on the presence of chronic symptoms of esophgeal dysfunction and esophageal eosinophilia characterised histologically by a significant eosinophilic infiltration of the oesophageal mucosa (>15 eosinophils per high powered field). In this review, we will provide an update on clinical presentation and diagnostic approach to EoE in children. We emphasized on the relevant aspects of the new clinical condition termed "PPI responsive esophageal eosinophilia", as entities distinct from EoE and the role of PPI trial in the diagnostic workup, therefore we proposed a new diagnostic algorithm.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Giovanni Di Nardo
- Address correspondence to this author at the Chair of Pediatrics, NESMOS Department, School of Medicine and Psychology, Sapienza University of Rome, Sant’Andrea University Hospital, Via di Grottarossa 1035-1039, 00189 - Rome, Italy; Tel: +393397267637; E-mail:
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12
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Di Nardo G, Aloi M, Cucchiara S, Spada C, Hassan C, Civitelli F, Nuti F, Ziparo C, Pession A, Lima M, La Torre G, Oliva S. Bowel preparations for colonoscopy: an RCT. Pediatrics 2014; 134:249-56. [PMID: 25002661 DOI: 10.1542/peds.2014-0131] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND The ideal preparation regimen for pediatric colonoscopy remains elusive, and available preparations continue to represent a challenge for children. The aim of this study was to compare the efficacy, safety, tolerability, and acceptance of 4 methods of bowel cleansing before colonoscopy in children. METHODS This randomized, investigator-blinded, noninferiority trial enrolled all children aged 2 to 18 years undergoing elective colonoscopy in a referral center for pediatric gastroenterology. Patients were randomly assigned to receive polyethylene glycol (PEG) 4000 with simethicon (PEG-ELS group) or PEG-4000 with citrates and simethicone plus bisacodyl (PEG-CS+Bisacodyl group), or PEG 3350 with ascorbic acid (PEG-Asc group), or sodium picosulfate plus magnesium oxide and citric acid (NaPico+MgCit group). Bowel cleansing was evaluated according to the Boston Bowel Preparation Scale. The primary end point was overall colon cleansing. Tolerability, acceptability, and compliance were also evaluated. RESULTS Two hundred ninety-nine patients were randomly allocated to the 4 groups. In the per-protocol analysis, PEG-CS+Bisacodyl, PEG-Asc, and NaPico+MgCit were noninferior to PEG-ELS in bowel-cleansing efficacy of both the whole colon (P = .910) and colonic segments. No serious adverse events occurred in any group. Rates of tolerability, acceptability, and compliance were significantly higher in the NaPico+MgCit group. CONCLUSIONS Low-volume PEG preparations (PEG-CS+Bisacodyl, PEG-Asc) and NaPico+MgCit are noninferior to PEG-ELS in children, representing an attractive alternative to high-volume regimens in clinical practice. Because of the higher tolerability and acceptability profile, NaPico+MgCit would appear as the most suitable regimen for bowel preparation in children.
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Affiliation(s)
| | - Marina Aloi
- Departments of Pediatrics, Pediatric Gastroenterology Unit, and
| | | | - Cristiano Spada
- Digestive Endoscopy Unit, Università Cattolica del Sacro Cuore, Rome, Italy; and
| | - Cesare Hassan
- Digestive Endoscopy Unit, Università Cattolica del Sacro Cuore, Rome, Italy; and
| | | | - Federica Nuti
- Departments of Pediatrics, Pediatric Gastroenterology Unit, and
| | - Chiara Ziparo
- Departments of Pediatrics, Pediatric Gastroenterology Unit, and
| | - Andrea Pession
- Departments of Paediatrics, Pediatric Gastroenterology and Nutrition Unit, and
| | - Mario Lima
- Pediatric Surgery, S. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Giuseppe La Torre
- Public Health and Infectious Diseases, "Sapienza" University of Rome, Rome, Italy
| | - Salvatore Oliva
- Departments of Pediatrics, Pediatric Gastroenterology Unit, and
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Affiliation(s)
- C. Ziparo
- Consiglio Nazionale delle Ricerche - Istituto dei Sistemi Complessi, via Madonna del Piano 10, I-50019
Sesto Fiorentino, Italy
| | - D. Colognesi
- Consiglio Nazionale delle Ricerche - Istituto dei Sistemi Complessi, via Madonna del Piano 10, I-50019
Sesto Fiorentino, Italy
| | - A. Giannasi
- Consiglio Nazionale delle Ricerche - Istituto dei Sistemi Complessi, via Madonna del Piano 10, I-50019
Sesto Fiorentino, Italy
| | - M. Zoppi
- Consiglio Nazionale delle Ricerche - Istituto dei Sistemi Complessi, via Madonna del Piano 10, I-50019
Sesto Fiorentino, Italy
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Giannasi A, Colognesi D, Fichtner M, Röhm E, Ulivi L, Ziparo C, Zoppi M. Temperature Behavior of the AlH3 Polymorph by in Situ Investigation Using High Resolution Raman Scattering. J Phys Chem A 2011; 115:691-9. [DOI: 10.1021/jp109027h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. Giannasi
- Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi, Via Madonna del Piano 10, I-50019, Sesto Fiorentino, Italy
| | - D. Colognesi
- Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi, Via Madonna del Piano 10, I-50019, Sesto Fiorentino, Italy
| | - M. Fichtner
- Karlsruhe Institute of Technology, Institute of Nanotechnology, Hermann-von-Helmholtz-Platz 1, 76347 Eggenstein-Leopoldshafen, Germany
| | - E. Röhm
- Karlsruhe Institute of Technology, Institute of Nanotechnology, Hermann-von-Helmholtz-Platz 1, 76347 Eggenstein-Leopoldshafen, Germany
| | - L. Ulivi
- Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi, Via Madonna del Piano 10, I-50019, Sesto Fiorentino, Italy
| | - C. Ziparo
- Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi, Via Madonna del Piano 10, I-50019, Sesto Fiorentino, Italy
| | - M. Zoppi
- Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi, Via Madonna del Piano 10, I-50019, Sesto Fiorentino, Italy
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Tombari E, Ziparo C, Salvetti G, Johari GP. Vibrational and configurational heat capacity of poly(vinyl acetate) from dynamic measurements. J Chem Phys 2007; 127:014905. [PMID: 17627367 DOI: 10.1063/1.2747596] [Citation(s) in RCA: 21] [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: 11/14/2022] Open
Abstract
The complex heat capacity C(p) (*) of poly(vinyl acetate) has been measured at 20.95 mrads modulation frequency during the cooling as well as on heating at 24, 8, and 2 Kh and during cooling at 0.5 Kh. The study is complemented with (the rate-dependent) C(p,app) measured during cooling and heating at 60, 24, and 8 Kh. At low temperatures, the real component of C(p) (*) yields the unrelaxed C(p) or C(p,vib), the vibrational part of C(p). It is found to be indistinguishable from C(p,glass) and lies on a line extrapolated to its equilibrium melt's temperature. At T near T(g),DeltaC(p)(=C(p,melt)-C(p,glass)) shows no detectable contribution from C(p,vib). The finding conflicts with a modified entropy theory calculation [E. A. DiMarzio and F. Dowell, J. Appl. Phys. 50, 6061 (1979)], which had predicted that approximately 27% of DeltaC(p) of poly(vinyl acetate) at T near T(g) is vibrational in origin and the remainder configurational. At T<T(g), the real component of C(p) (*) varies more slowly with T than C(p,app).
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Affiliation(s)
- E Tombari
- Istituto per i Processi Chimico-Fisici del CNR, via G. Moruzzi 1, 56124 Pisa, Italy
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