1
|
Spissu P, Contini F, Licciardi M, Leoni L, Fazzini L, Angius S, Perra F, Secchi S, Marchetti M, Montisci R. P314 WHEN TAKO–TSUBO TRAPS… NOT ONLY OCTOPUSES. Eur Heart J Suppl 2022. [DOI: 10.1093/eurheartj/suac012.301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
The case we present involves a 75 years–old woman with no cardiological past medical history, who presented to our attention complaining of sudden onset thoracic pain associated with dyspnea, dry cough, nausea and an episode of vomit. She called 911 rapidly coming to our Hospital. In the Emergency room an EKG showed ST segment depression in the inferior leads and in the blood test a remarkable increase in HS–Troponin level was evident. An echocardiogram showed mid and apical left ventricle segments hypokinesia with moderately reduced Ejection Fraction (45%); notably, right ventricle was increased in dimension with moderate tricuspid regurgitation and mild pulmonary hypertension. Because of this last find, D–dimer was checked and a pulmonary angio– CT was performed which excluded active pulmonary embolism. Next day she underwent coronary angiography which showed no coronary lesion able to explain the clinical and echocardiographic presentation; left ventriculography was also performed showing an increase in end–systolic volume with hypokinesia of the anterolateral, apical and diaphragmatic walls and an Ejection Fraction (EF) of 30%. These findings allowed us to make the diagnosis of Tako–Tsubo syndrome, also known as stress–induced cardiomyopathy. Few days later, a cardiac magnetic resonance (CMR) was performed showing whole apical and antero–lateral mid ventricular hypokinesia with compensatory hyperkinesia of basal segments; T2–weighted sequences were positive at the hypokinetic segments with no specific Late Gadolinium Enhanced (LGE) images. What’s more, an atrial septal defect type “ostium secundum” was clearly evident, causing a left–to–right shunt hemodynamically significant (Qp/Qs of about 2,8) with right atrial and right ventricle dilatation. Pulmonary artery and its main branches were dilated too. After these findings, lady underwent right heart cardiac catheterization that reported a Qp/Qs of 3,24 and a shunt flow of 8,78 L/min, with a cardiac index of 2,5 L/min/m2 and normal pulmonary vascular resistance (0,7 Wood Units). Because of these measures the patient was discharged from our Cardiology Unit and referred to the Interventional Cardiology centre of our city for the percutaneous closure of the hemodynamically significant atrial septal defect.
This case is curious because it shows how things in Cardiology can be deeply and unpredictably connected.
Collapse
Affiliation(s)
- P Spissu
- CLINICAL CARDIOLOGY UNIT, AOU OF CAGLIARI, DEPARTMENT OF MEDICAL SCIENCES AND PUBLIC HEALTH, UNIVERSITY OF CAGLIARI, CAGLIARI
| | - F Contini
- CLINICAL CARDIOLOGY UNIT, AOU OF CAGLIARI, DEPARTMENT OF MEDICAL SCIENCES AND PUBLIC HEALTH, UNIVERSITY OF CAGLIARI, CAGLIARI
| | - M Licciardi
- CLINICAL CARDIOLOGY UNIT, AOU OF CAGLIARI, DEPARTMENT OF MEDICAL SCIENCES AND PUBLIC HEALTH, UNIVERSITY OF CAGLIARI, CAGLIARI
| | - L Leoni
- CLINICAL CARDIOLOGY UNIT, AOU OF CAGLIARI, DEPARTMENT OF MEDICAL SCIENCES AND PUBLIC HEALTH, UNIVERSITY OF CAGLIARI, CAGLIARI
| | - L Fazzini
- CLINICAL CARDIOLOGY UNIT, AOU OF CAGLIARI, DEPARTMENT OF MEDICAL SCIENCES AND PUBLIC HEALTH, UNIVERSITY OF CAGLIARI, CAGLIARI
| | - S Angius
- CLINICAL CARDIOLOGY UNIT, AOU OF CAGLIARI, DEPARTMENT OF MEDICAL SCIENCES AND PUBLIC HEALTH, UNIVERSITY OF CAGLIARI, CAGLIARI
| | - F Perra
- CLINICAL CARDIOLOGY UNIT, AOU OF CAGLIARI, DEPARTMENT OF MEDICAL SCIENCES AND PUBLIC HEALTH, UNIVERSITY OF CAGLIARI, CAGLIARI
| | - S Secchi
- CLINICAL CARDIOLOGY UNIT, AOU OF CAGLIARI, DEPARTMENT OF MEDICAL SCIENCES AND PUBLIC HEALTH, UNIVERSITY OF CAGLIARI, CAGLIARI
| | - M Marchetti
- CLINICAL CARDIOLOGY UNIT, AOU OF CAGLIARI, DEPARTMENT OF MEDICAL SCIENCES AND PUBLIC HEALTH, UNIVERSITY OF CAGLIARI, CAGLIARI
| | - R Montisci
- CLINICAL CARDIOLOGY UNIT, AOU OF CAGLIARI, DEPARTMENT OF MEDICAL SCIENCES AND PUBLIC HEALTH, UNIVERSITY OF CAGLIARI, CAGLIARI
| |
Collapse
|
2
|
Fumanelli J, Elhyka A, Rotella M, Ferretto S, Di Salvo G, Iliceto S, Leoni L. P155 SINGLE CENTER EXPERIENCE ICD IMPLANTATION IN PEDIATRIC AGE. Eur Heart J Suppl 2022. [DOI: 10.1093/eurheartj/suac012.148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Background
Despite sudden cardiac death (SCD) is a rare phenomenon in pediatric age, the use of the implantable defibrillator (ICD) is progressively increasing in consideration of its life–saving role. Our work aims at evaluating our pediatric population to verify the protective role of the device in terms of SCD prevention, acute and chronic complications and to evaluate the role played by the device as a bridge to transplantation.
Methods
The retrospective study includes patients under the age of 18 underwent ICD implantation, following the guidelines and recommendations currently in force, in the time period between March 2000 and July 2020. Each device has been programmed in a personalized way based on age and cardiac pathology. All patients were then followed–up by evaluating the appropriate shocks, the acute and chronic complications, especially the inappropriate shocks.
RESULTS
The study group includes 55 subjects (41 males and 12 females) with a mean age of 14±4 years (range 2–18) and a mean follow–up time of 6.2 years. Thirty subjects had cardiomyopathy (CM), 15 electrical disease (ED) and 10 congenital heart disease (CHD) respectively. We used three different implantation technique (endocavitary, subcutaneous and hybrid technique) depending on the size of the patient and the cardiac anatomy. CHD and CM are mostly implanted in primary prevention. The rate of appropriate shocks in secondary prevention is higher than that in the primary one regardless of the disease (67% vs 33%). Thirty–eight percent of patients received appropriate shock, of which 66.7% were patients who had received defibrillator as a bridge to heart transplant. Two patients (3.6%) received inappropriate shocks on supraventricular tachycardia. There were no acute post–implantation complications. None dysfunctions or ruptures of the shock catheter or episodes of T wave oversensing took place. Peri–procedural and post–transplant mortality is zero.
Conclusions
The study confirmed the protective role of the device, in terms of prevention of sudden cardiac death, and its relevance as bridge to heart transplantation in pediatric age. An implant technique adequate to the size, age and heart disease of the patient associated with an adequate programming of the device significantly reduced inappropriate shocks in our patients.
Collapse
Affiliation(s)
| | - A Elhyka
- AZIENDA OSPEDALE UNIVERSITÀ PADOVA, PADOVA
| | - M Rotella
- AZIENDA OSPEDALE UNIVERSITÀ PADOVA, PADOVA
| | - S Ferretto
- AZIENDA OSPEDALE UNIVERSITÀ PADOVA, PADOVA
| | - G Di Salvo
- AZIENDA OSPEDALE UNIVERSITÀ PADOVA, PADOVA
| | - S Iliceto
- AZIENDA OSPEDALE UNIVERSITÀ PADOVA, PADOVA
| | - L Leoni
- AZIENDA OSPEDALE UNIVERSITÀ PADOVA, PADOVA
| |
Collapse
|
3
|
Elhyka A, Fumanelli J, Di Salvo G, Iliceto S, Leoni L. P170 VALUE OF ELECTROCARDIOGRAPHIC SCREENING FOR EARLY DETECTION OF ARRHYTHMIC AND MALIGNANT HEART DISEASE IN CHILDREN. Eur Heart J Suppl 2022. [DOI: 10.1093/eurheartj/suac012.163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Background
Twelve–lead electrocardiography (ECG) is a tool that can identify cardiac conduction abnormalities that predispose to sudden cardiac death (SCD) in completely asymptomatic subjects. The rate of sudden cardiac death in childhood is estimated at 1–1.5 cases per 100,000 individuals and 10–15% of events occur during physical activity. We evaluated the importance of the electrocardiogram performed in childhood in the early diagnosis of asymptomatic electrocardiographic changes suggestive for electrical or structural heart disease potentially at risk of sudden death.
Materials and Methods
we analyzed 623 patients aged 0–16 years who were referred to the pediatric arrhythmology clinic in Padua Hospital between October 2013 and March 2020. Patients were referred to our second–level clinic after a first electrocardiographic alteration found out in ECG screening performed for sports activity. All patients were evaluated with clinical history and ECG. Then, depending on the suspected pathology, Holter ECG, ergometric test, echocardiogram, MRI were performed for adequate risk stratification.
Results
Of the 623 patients evaluated, 393 (63%) were referred by sports medicine, 179 (29%) by the hospital pediatric clinic or family pediatrician, and 51 patients (8%) were referred for familiarity. 45% of patients (280) were referred for suspected WPW; 124 patients (20%) for many BEV and suspected ARVD; 85 patients (14%) for suspected long QT, 31 patients (5%) for suspected Brugada pattern; 7 patients (1%) for suspected CPVT; 8 patients (1%) for electrocardiographic changes with suspected HCM; 1 patient (0.01%) for suspected short QT and 88 patients (14%) for other arrhythmic disorders not at risk of sudden death. The diagnosis of WPW was confirmed in 280 patients (100%), LQTS in 45 patients (52%), SQTS in 1 patient (100%), S. of Brugada in 8 patients (25%), CPVT in 5 patients (71%), HCM in 8 patients (100%) and ARVD in 6 patients (5%).
Conclusions
Our study demonstrates that electrocardiographic screening in childhood allows early diagnosis and treatment of life–threatening arrhythmic heart disease.
Collapse
Affiliation(s)
- A Elhyka
- AZIENDA OSPEDALE UNIVERSITÀ PADOVA, PADOVA
| | | | - G Di Salvo
- AZIENDA OSPEDALE UNIVERSITÀ PADOVA, PADOVA
| | - S Iliceto
- AZIENDA OSPEDALE UNIVERSITÀ PADOVA, PADOVA
| | - L Leoni
- AZIENDA OSPEDALE UNIVERSITÀ PADOVA, PADOVA
| |
Collapse
|
4
|
Lopes LR, Losi MA, Sheikh N, Laroche C, Charron P, Gimeno J, Kaski JP, Maggioni AP, Tavazzi L, Arbustini E, Brito D, Celutkiene J, Hagege A, Linhart A, Mogensen J, Garcia-Pinilla JM, Ripoll-Vera T, Seggewiss H, Villacorta E, Caforio A, Elliott PM, Beleslin B, Budaj A, Chioncel O, Dagres N, Danchin N, Erlinge D, Emberson J, Glikson M, Gray A, Kayikcioglu M, Maggioni A, Nagy KV, Nedoshivin A, Petronio AS, Hesselink JR, Wallentin L, Zeymer U, Caforio A, Blanes JRG, Charron P, Elliott P, Kaski JP, Maggioni AP, Tavazzi L, Tendera M, Komissarova S, Chakova N, Niyazova S, Linhart A, Kuchynka P, Palecek T, Podzimkova J, Fikrle M, Nemecek E, Bundgaard H, Tfelt-Hansen J, Theilade J, Thune JJ, Axelsson A, Mogensen J, Henriksen F, Hey T, Nielsen SK, Videbaek L, Andreasen S, Arnsted H, Saad A, Ali M, Lommi J, Helio T, Nieminen MS, Dubourg O, Mansencal N, Arslan M, Tsieu VS, Damy T, Guellich A, Guendouz S, Tissot CM, Lamine A, Rappeneau S, Hagege A, Desnos M, Bachet A, Hamzaoui M, Charron P, Isnard R, Legrand L, Maupain C, Gandjbakhch E, Kerneis M, Pruny JF, Bauer A, Pfeiffer B, Felix SB, Dorr M, Kaczmarek S, Lehnert K, Pedersen AL, Beug D, Bruder M, Böhm M, Kindermann I, Linicus Y, Werner C, Neurath B, Schild-Ungerbuehler M, Seggewiss H, Pfeiffer B, Neugebauer A, McKeown P, Muir A, McOsker J, Jardine T, Divine G, Elliott P, Lorenzini M, Watkinson O, Wicks E, Iqbal H, Mohiddin S, O'Mahony C, Sekri N, Carr-White G, Bueser T, Rajani R, Clack L, Damm J, Jones S, Sanchez-Vidal R, Smith M, Walters T, Wilson K, Rosmini S, Anastasakis A, Ritsatos K, Vlagkouli V, Forster T, Sepp R, Borbas J, Nagy V, Tringer A, Kakonyi K, Szabo LA, Maleki M, Bezanjani FN, Amin A, Naderi N, Parsaee M, Taghavi S, Ghadrdoost B, Jafari S, Khoshavi M, Rapezzi C, Biagini E, Corsini A, Gagliardi C, Graziosi M, Longhi S, Milandri A, Ragni L, Palmieri S, Olivotto I, Arretini A, Castelli G, Cecchi F, Fornaro A, Tomberli B, Spirito P, Devoto E, Bella PD, Maccabelli G, Sala S, Guarracini F, Peretto G, Russo MG, Calabro R, Pacileo G, Limongelli G, Masarone D, Pazzanese V, Rea A, Rubino M, Tramonte S, Valente F, Caiazza M, Cirillo A, Del Giorno G, Esposito A, Gravino R, Marrazzo T, Trimarco B, Losi MA, Di Nardo C, Giamundo A, Musella F, Pacelli F, Scatteia A, Canciello G, Caforio A, Iliceto S, Calore C, Leoni L, Marra MP, Rigato I, Tarantini G, Schiavo A, Testolina M, Arbustini E, Di Toro A, Giuliani LP, Serio A, Fedele F, Frustaci A, Alfarano M, Chimenti C, Drago F, Baban A, Calò L, Lanzillo C, Martino A, Uguccioni M, Zachara E, Halasz G, Re F, Sinagra G, Carriere C, Merlo M, Ramani F, Kavoliuniene A, Krivickiene A, Tamuleviciute-Prasciene E, Viezelis M, Celutkiene J, Balkeviciene L, Laukyte M, Paleviciute E, Pinto Y, Wilde A, Asselbergs FW, Sammani A, Van Der Heijden J, Van Laake L, De Jonge N, Hassink R, Kirkels JH, Ajuluchukwu J, Olusegun-Joseph A, Ekure E, Mizia-Stec K, Tendera M, Czekaj A, Sikora-Puz A, Skoczynska A, Wybraniec M, Rubis P, Dziewiecka E, Wisniowska-Smialek S, Bilinska Z, Chmielewski P, Foss-Nieradko B, Michalak E, Stepien-Wojno M, Mazek B, Lopes LR, Almeida AR, Cruz I, Gomes AC, Pereira AR, Brito D, Madeira H, Francisco AR, Menezes M, Moldovan O, Guimaraes TO, Silva D, Ginghina C, Jurcut R, Mursa A, Popescu BA, Apetrei E, Militaru S, Coman IM, Frigy A, Fogarasi Z, Kocsis I, Szabo IA, Fehervari L, Nikitin I, Resnik E, Komissarova M, Lazarev V, Shebzukhova M, Ustyuzhanin D, Blagova O, Alieva I, Kulikova V, Lutokhina Y, Pavlenko E, Varionchik N, Ristic AD, Seferovic PM, Veljic I, Zivkovic I, Milinkovic I, Pavlovic A, Radovanovic G, Simeunovic D, Zdravkovic M, Aleksic M, Djokic J, Hinic S, Klasnja S, Mircetic K, Monserrat L, Fernandez X, Garcia-Giustiniani D, Larrañaga JM, Ortiz-Genga M, Barriales-Villa R, Martinez-Veira C, Veira E, Cequier A, Salazar-Mendiguchia J, Manito N, Gonzalez J, Fernández-Avilés F, Medrano C, Yotti R, Cuenca S, Espinosa MA, Mendez I, Zatarain E, Alvarez R, Pavia PG, Briceno A, Cobo-Marcos M, Dominguez F, Galvan EDT, Pinilla JMG, Abdeselam-Mohamed N, Lopez-Garrido MA, Hidalgo LM, Ortega-Jimenez MV, Mezcua AR, Guijarro-Contreras A, Gomez-Garcia D, Robles-Mezcua M, Blanes JRG, Castro FJ, Esparza CM, Molina MS, García MS, Cuenca DL, de Mallorca P, Ripoll-Vera T, Alvarez J, Nunez J, Gomez Y, Fernandez PLS, Villacorta E, Avila C, Bravo L, Diaz-Pelaez E, Gallego-Delgado M, Garcia-Cuenllas L, Plata B, Lopez-Haldon JE, Pena Pena ML, Perez EMC, Zorio E, Arnau MA, Sanz J, Marques-Sule E. Association between common cardiovascular risk factors and clinical phenotype in patients with hypertrophic cardiomyopathy from the European Society of Cardiology (ESC) EurObservational Research Programme (EORP) Cardiomyopathy/Myocarditis registry. Eur Heart J Qual Care Clin Outcomes 2022; 9:42-53. [PMID: 35138368 PMCID: PMC9745665 DOI: 10.1093/ehjqcco/qcac006] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 02/02/2022] [Accepted: 02/04/2022] [Indexed: 12/15/2022]
Abstract
AIMS The interaction between common cardiovascular risk factors (CVRF) and hypertrophic cardiomyopathy (HCM) is poorly studied. We sought to explore the relation between CVRF and the clinical characteristics of patients with HCM enrolled in the EURObservational Research Programme (EORP) Cardiomyopathy registry. METHODS AND RESULTS 1739 patients with HCM were studied. The relation between hypertension (HT), diabetes (DM), body mass index (BMI), and clinical traits was analysed. Analyses were stratified according to the presence or absence of a pathogenic variant in a sarcomere gene. The prevalence of HT, DM, and obesity (Ob) was 37, 10, and 21%, respectively. HT, DM, and Ob were associated with older age (P<0.001), less family history of HCM (HT and DM P<0.001), higher New York Heart Association (NYHA) class (P<0.001), atrial fibrillation (HT and DM P<0.001; Ob p = 0.03) and LV (left ventricular) diastolic dysfunction (HT and Ob P<0.001; DM P = 0.003). Stroke was more frequent in HT (P<0.001) and mutation-positive patients with DM (P = 0.02). HT and Ob were associated with higher provocable LV outflow tract gradients (HT P<0.001, Ob P = 0.036). LV hypertrophy was more severe in Ob (P = 0.018). HT and Ob were independently associated with NYHA class (OR 1.419, P = 0.017 and OR 1.584, P = 0.004, respectively). Other associations, including a higher proportion of females in HT and of systolic dysfunction in HT and Ob, were observed only in mutation-positive patients. CONCLUSION Common CVRF are associated with a more severe HCM phenotype, suggesting a proactive management of CVRF should be promoted. An interaction between genotype and CVRF was observed for some traits.
Collapse
Affiliation(s)
- Luis R Lopes
- Corresponding author. Tel: +447765109343, , Twitter handle: @LuisRLopesDr
| | - Maria-Angela Losi
- Department of Advanced Biomedical Sciences, University Federico II, Corso Umberto I, 40, Naples 80138, Italy
| | - Nabeel Sheikh
- Department of Cardiology and Division of Cardiovascular Sciences, Guy's and St. Thomas’ Hospitals and King's College London, Strand, London WC2R 2LS, UK
| | - Cécile Laroche
- EORP, European Society of Cardiology, Sophia-Antipolis, France
| | | | | | - Juan P Kaski
- Institute of Cardiovascular Science, University College London, Gower St, London WC1E 6BT, UK,Centre for Inherited Cardiovascular Diseases, Great Ormond Street Hospital, London WC1N 3JH, UK
| | - Aldo P Maggioni
- EORP, European Society of Cardiology, Sophia-Antipolis, France,Maria Cecilia Hospital, GVM Care&Research, Via Corriera, 1, Cotignola 48033 RA, Italy
| | - Luigi Tavazzi
- Maria Cecilia Hospital, GVM Care&Research, Via Corriera, 1, Cotignola 48033 RA, Italy
| | | | - Dulce Brito
- Serviço de Cardiologia, Centro Hospitalar Universitário Lisboa Norte, Lisbon 1169-050, Portugal,CCUL, Faculdade de Medicina, Universidade de Lisboa, Av. Prof. Egas Moniz MB, Lisbon 1649-028, Portugal
| | - Jelena Celutkiene
- Clinic of Cardiac and Vascular Diseases, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Universiteto g. 3, Vilnius 01513, Lithuania,State Research Institute Centre for Innovative Medicine, Vilnius, Lithuania
| | | | - Ales Linhart
- 2nd Department of Internal Cardiovascular Medicine, General University Hospital and First Medical Faculty, Charles University, Opletalova 38, Prague 110 00, Czech Republic
| | - Jens Mogensen
- Department of Cardiology, Odense University Hospital, J. B. Winsløws Vej 4, Odense 5000, Denmark
| | - José Manuel Garcia-Pinilla
- Unidad de Insuficiencia Cardiaca y Cardiopatías Familiares. Servicio de Cardiología. Hospital Universitario Virgen de la Victoria. IBIMA. Málaga and Ciber-Cardiovascular. Instituto de Salud Carlos III. Madrid, Spain
| | - Tomas Ripoll-Vera
- Inherited Cardiovascular Disease Unit Son Llatzer University Hospital & IdISBa, Palma de Mallorca, Spain
| | - Hubert Seggewiss
- Universitätsklinikum Würzburg, Deutsches Zentrum für Herzinsuffizienz (DZHI), Comprehensive Heart Failure Center (CHFC), Am Schwarzenberg 15, Haus 15A, 97078 Wurzburg, Germany
| | - Eduardo Villacorta
- Member of National Centers of expertise for familial cardiopathies (CSUR), Cardiology Department, University Hospital of Salamanca. Institute of Biomedical Research of Salamanca (IBSAL), CIBERCV, Salamanca, Spain
| | | | - Perry M Elliott
- Institute of Cardiovascular Science, University College London, Gower St, London WC1E 6BT, UK,St. Bartholomew's Hospital, Barts Heart Centre, Barts Health NHS Trust, Whitechapel Rd, London E1 1BB, UK
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
5
|
Sasdelli A, Guidetti M, Musio A, Mari G, Battaiola C, Baracco B, Bocedi G, Leoni L, Ravaioli F, Agnelli G, Rossetti C, Sacillotto F, Albanese M, Venerito F, Serra C, Pironi L. Intestinal failure associated liver disease after weaning off home parenteral nutrition: a 12-month follow up. Clin Nutr ESPEN 2021. [DOI: 10.1016/j.clnesp.2021.09.318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
6
|
Di Menna L, Busceti CL, Ginerete RP, D'Errico G, Orlando R, Alborghetti M, Bruno V, Battaglia G, Fornai F, Leoni L, Rampioni G, Visca P, Monn JA, Nicoletti F. The bacterial quorum sensing molecule, 2-heptyl-3-hydroxy-4-quinolone (PQS), inhibits signal transduction mechanisms in brain tissue and is behaviorally active in mice. Pharmacol Res 2021; 170:105691. [PMID: 34044128 DOI: 10.1016/j.phrs.2021.105691] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 04/25/2021] [Accepted: 05/20/2021] [Indexed: 12/29/2022]
Abstract
Interkingdom communication between bacteria and host organisms is one of the most interesting research topics in biology. Quorum sensing molecules produced by Gram-negative bacteria, such as acylated homoserine lactones and quinolones, have been shown to interact with host cell receptors, stimulating innate immunity and bacterial clearance. To our knowledge, there is no evidence that these molecules influence CNS function. Here, we have found that low micromolar concentrations of the Pseudomonas aeruginosa quorum sensing autoinducer, 2-heptyl-3-hydroxy-4-quinolone (PQS), inhibited polyphosphoinositide hydrolysis in mouse brain slices, whereas four selected acylated homoserine lactones were inactive. PQS also inhibited forskolin-stimulated cAMP formation in brain slices. We therefore focused on PQS in our study. Biochemical effects of PQS were not mediated by the bitter taste receptors, T2R4 and T2R16. Interestingly, submicromolar concentrations of PQS could be detected in the serum and brain tissue of adult mice under normal conditions. Levels increased in five selected brain regions after single i.p. injection of PQS (10 mg/kg), peaked after 15 min, and returned back to normal between 1 and 4 h. Systemically administered PQS reduced spontaneous locomotor activity, increased the immobility time in the forced swim test, and largely attenuated motor response to the psychostimulant, methamphetamine. These findings offer the first demonstration that a quorum sensing molecule specifically produced by Pseudomonas aeruginosa is centrally active and influences cell signaling and behavior. Quorum sensing autoinducers might represent new interkingdom signaling molecules between ecological communities of commensal, symbiotic, and pathogenic microorganisms and the host CNS.
Collapse
Affiliation(s)
| | | | | | | | - R Orlando
- IRCCS Neuromed, Pozzilli, Italy; Department of Physiology and Phamacology, Sapienza University, Roma, Italy
| | - M Alborghetti
- Department of Neuroscience, Mental Health, and Sensory Organs, Sapienza University, Italy
| | - V Bruno
- IRCCS Neuromed, Pozzilli, Italy; Department of Physiology and Phamacology, Sapienza University, Roma, Italy
| | - G Battaglia
- IRCCS Neuromed, Pozzilli, Italy; Department of Physiology and Phamacology, Sapienza University, Roma, Italy
| | - F Fornai
- IRCCS Neuromed, Pozzilli, Italy; Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Italy
| | - L Leoni
- Department of Science, Roma Tre University, Roma, Italy
| | - G Rampioni
- Department of Science, Roma Tre University, Roma, Italy; Fondazione Santa Lucia IRCCS, Roma, Italy
| | - P Visca
- Department of Science, Roma Tre University, Roma, Italy; Fondazione Santa Lucia IRCCS, Roma, Italy
| | | | - F Nicoletti
- IRCCS Neuromed, Pozzilli, Italy; Department of Physiology and Phamacology, Sapienza University, Roma, Italy.
| |
Collapse
|
7
|
Sasdelli A, Guidetti M, Pazzeschi C, Musio A, Mari G, Battaiola C, Bocedi G, Baracco B, Ravaioli F, Leoni L, Pironi L. Transition of patients with chronic intestinal failure from paediatric to adult center. Clin Nutr ESPEN 2020. [DOI: 10.1016/j.clnesp.2020.09.253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
8
|
Sasdelli A, Guidetti M, Pazzeschi C, Musio A, Mari G, Battaiola C, Bocedi G, Baracco B, Ravaioli F, Leoni L, Pironi L. Intestinal failure associated liver disease: A one-year prospective study. Clin Nutr ESPEN 2020. [DOI: 10.1016/j.clnesp.2020.09.322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
9
|
Coscarelli C, Leoni L, Força F, Feris F, Nacao N, Fonseca F, Machado M, Raimundo R, Cavalcante C, Pereira P. Cost minimization of 3 methods of acquiring dental radiographic image. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa166.567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
The objective of this study is to develop a complete economic evaluation of 3 diagnostic techniques for interproximal radiographic, comparing the conventional radiographic technique, direct (CMOS) and indirect (PSP) digital techniques in the diagnosis of dental caries, from the perspective of SESC/Brazil (Social Trade Service). A complete cost-minimization economic assessment was performed. Initially, a systematic review was performed and it was verified that the accuracy for the diagnosis is similar between the techniques. The direct medical costs (related to the technique) were estimated by the bottom-up technique, taking into account the value of the clinical hours of the professionals, equipments and materials used. The time horizon was 10 years. The values were discounted at 3% per year, and a sensitivity analysis was prepared into two scenarios (one more pessimistic with costs 20% higher than estimated and one more optimistic with costs 20% lower). Direct digital radiography proved to be the option with the lowest cost (US$ 1.16), followed by semi-direct (US$ 1.35) and conventional (US$ 1.47). Conventional radiography presented the highest cost for the period (US$ 74,943.65), and the use of digital radiographs could promote savings of US$ 6,000.59 and US$ 15,448.35, if used by the semi-direct and direct method. respectively. Regarding the sensitivity analysis, in the most optimistic scenario of the time horizon there would be savings of US$ 4,800.47 (semi-direct digital) to US$ 12,446.09 (direct digital) compared to the traditional technique (films). In the most pessimistic scenario, these values vary in savings over the time horizon from US$ 7,200.71 (semi-direct) to US$ 18,538.02 (direct). It is concluded that the direct radiographic technique was the most cost effective and its incorporation in the SESC units is suggested.
Key messages
Digital dental radiography. Cost minimization analysis. Health technology assessment.
Collapse
Affiliation(s)
- C Coscarelli
- Gerência de Saúde da Divisão de Programas Sociais, SESC Serviço Social do Comércio Administração Regional Rio de Janeiro, Rio de Janeiro, Brazil
| | - L Leoni
- Gerência de Saúde da Divisão de Programas Sociais, SESC Serviço Social do Comércio Administração Regional Minas Gerais, Minas Gerais, Brazil
| | - F Força
- Unidades Móveis, SESC Serviço Social do Comércio Administração Regional Pará, Pará, Brazil
| | - F Feris
- Unidades Móveis, SESC Serviço Social do Comércio Administração Regional Rio de Janeiro, Rio de Janeiro, Brazil
| | - N Nacao
- Gerência de Saúde da Divisão de Programas Sociais, Serviço Social do Comércio Departamento Nacional, Rio de Janeiro, Brazil
| | - F Fonseca
- Gerência de Saúde da Divisão de Programas Sociais, Serviço Social do Comércio Departamento Nacional, Rio de Janeiro, Brazil
| | - M Machado
- Gerência de Saúde da Divisão de Programas Sociais, Serviço Social do Comércio Departamento Nacional, Rio de Janeiro, Brazil
| | - R Raimundo
- Communiy Dentistry Departament, Piracicaba Dental School University of Campinas, São Paulo, Brazil
| | - C Cavalcante
- Communiy Dentistry Departament, Piracicaba Dental School University of Campinas, São Paulo, Brazil
| | - P Pereira
- Communiy Dentistry Departament, Piracicaba Dental School University of Campinas, São Paulo, Brazil
| |
Collapse
|
10
|
Tonelli F, Cotti S, Leoni L, Besio R, Gioia R, Marchese L, Giorgetti S, Villani S, Gistelinck C, Wagener R, Kobbe B, Fiedler I, Larionova D, Busse B, Eyre D, Rossi A, Witten P, Forlino A. Crtap and p3h1 knock out zebrafish support defective collagen chaperoning as the cause of their osteogenesis imperfecta phenotype. Matrix Biol 2020; 90:40-60. [DOI: 10.1016/j.matbio.2020.03.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 03/05/2020] [Accepted: 03/05/2020] [Indexed: 12/15/2022]
|
11
|
Gianstefani S, Cheng CY, Baritussio A, Seguso M, Gallo N, Leoni L, Rizzo S, Perazzolo Marra M, Tarantini G, Plebani M, Basso C, Marcolongo R, Caforio ALP, Iliceto S. P5563Biopsy proven myocarditis: clinical and instrumental predictors of adverse prognosis at presentation. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Myocarditis is an insidious and potentially fatal illness with different clinical presentations and an unpredictable course. Prompt recognition of high risk patients is of paramount importance in preventing major adverse events.
Purpose
To identify predictors of dismal prognosis in a large cohort of patients with biopsy proven myocarditis.
Methods
Univariate analysis was used to identify predictors of death and heart transplant in a prospective cohort of 366 patients with biopsy proven myocarditis (aged 38±17, male 66%) using student's test and contingency tables as appropriate.
Results
At the time of follow up 46 patients (13%) were dead or received heart transplant (DHTX), 283 (77%) were alive (A) and 37 (10%) lost at follow up. Age at presentation was 33±20 y in DHTX v.s 39±15 in A cohort (p=0.057). Clinical features predicting adverse prognosis included female gender (p=0.002), heart failure at presentation (p=0.000), NYHA class II to IV (p=0.000). Clinical and radiographic signs of both left and right heart failure suggested worse outcome (p=0.000) as well as ongoing anticoagulation therapy (p=0.009). On ECG right (R) or left (L) axis deviation was a strong predictor of events (p=0.000). From an echocardiography perspective the presence of mild to severe mitral regurgitation (p=0.03), reduced left ventricular systolic function (FE) (p=0.000), reduced right ventricular fractional area change (FAC) (p=0.035) was strongly correlated to death or heart transplant. On cardiac catheterization the variables predicting unfavourable outcome included reduced left ventricular systolic pressure (LVSP) (p=0.000), reduced mean aortic pressure (mAP) (p=0.002), increased mean right atrial pressure (RAP) (p=0.001), FE on angiography (p=0.000). On cardiac biopsy (Bx) negative predictors were giant cell histology type (p=0.000) and PCR positive for viral genome (p=0.02) particularly for parvovirus B19 (p=0.04), adenovirus (p=0.04), and Epstein Barr virus (EBV) (p=0.03). See Tab 1
Table 1
Conclusion
Female gender, HF like presentation, reduced LV and RV systolic function, R or L axis deviation on ECG, presence of viral PCR or giant cell histology on Bx, reduced LVSP and mAP; increased RAP may be useful parameters to identify high risk patients on presentation. This may increase clinical efforts and surveillance in this subgroup in order to reduce the incidence of major adverse events.
Collapse
Affiliation(s)
- S Gianstefani
- University of Padova, Dept of Cardiac Thoracic and Vascular Sciences, Padua, Italy
| | - C Y Cheng
- University of Padova, Dept of Cardiac Thoracic and Vascular Sciences, Padua, Italy
| | - A Baritussio
- University of Padova, Dept of Cardiac Thoracic and Vascular Sciences, Padua, Italy
| | - M Seguso
- University of Padova, Department of Laboratory Medicine, Padua, Italy
| | - N Gallo
- University of Padova, Department of Laboratory Medicine, Padua, Italy
| | - L Leoni
- University of Padova, Dept of Cardiac Thoracic and Vascular Sciences, Padua, Italy
| | - S Rizzo
- University of Padova, Cardiovascular Pathology, Department of Cardiac, Thoracic and Vascular Sciences, Padua, Italy
| | - M Perazzolo Marra
- University of Padova, Dept of Cardiac Thoracic and Vascular Sciences, Padua, Italy
| | - G Tarantini
- University of Padova, Dept of Cardiac Thoracic and Vascular Sciences, Padua, Italy
| | - M Plebani
- University of Padova, Department of Laboratory Medicine, Padua, Italy
| | - C Basso
- University of Padova, Cardiovascular Pathology, Department of Cardiac, Thoracic and Vascular Sciences, Padua, Italy
| | - R Marcolongo
- University of Padova, Haematology and Clinical Immunology, Department of Medicine, Padua, Italy
| | - A L P Caforio
- University of Padova, Dept of Cardiac Thoracic and Vascular Sciences, Padua, Italy
| | - S Iliceto
- University of Padova, Dept of Cardiac Thoracic and Vascular Sciences, Padua, Italy
| |
Collapse
|
12
|
Caforio A, Marcolongo R, Cheng CY, Gianstefani S, Baritussio A, Seguso M, Gallo N, Leoni L, Rizzo S, Perazzolo Marra M, Tarantini GP, Plebani M, Basso CY, Iliceto S. P4651Biopsy-proven myocarditis: independent predictors of dismal prognosis, relapse and role of immunosuppressive therapy. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.1033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Biopsy-proven myocarditis may be infectious or autoimmune. Risk stratification in biopsy-proven myocarditis and the role of immunosuppressive therapy in autoimmune forms have not been completely defined.
Purpose
To identify clinical, instrumental and immunological predictors of death, cardiac transplantation and relapse in a prospective cohort of 314 biopsy-proven myocarditis patients, and describe the effect of immunosuppressive treatment on secondary outcome measures, e.g. left ventricular ejection fraction (LVEF), in a subgroup of 45 consecutive patients with biopsy-proven autoimmune myocarditis diagnosed in our Cardiology Clinic.
Methods
Univariate and multivariate Cox regression analysis were used to identify predictors of death, heart transplant, and relapse in a cohort of 314 patients with biopsy-proven myocarditis (male 75%, median age 37). Actuarial survival free from death or transplant was calculated by the Kaplan-Meier method.
Results
Actuarial survival free from death or heart transplantation was 83% at 5 years. Among the clinical, instrumental and immunological features at diagnosis, independent predictors of death or heart transplantation by multivariable analysis were a lower transthoracic echocardiographic biplane LVEF% (p=0.001) and high serum titre for anti-nucler (ANA) and anti-cardiac endothelial cell autoantibodies (AECA). The only independent predictor of relapse was previous history of myocarditis. Immunosuppressive therapy was associated with a significantly favorable effect on LVEF (LVEF pre-therapy 37% (26; 50 interquartile range) vs. LVEF post-therapy 59% (48; 65 interquartile range), respectively, p=0.000).
Conclusions
In biopsy-proven myocarditis left ventricular dysfunction at diagnosis and autoimmune pathogenesis are associated with dismal prognosis, immunosuppressive therapy with improved LVEF in autoimmune patients.
Collapse
Affiliation(s)
- A Caforio
- Cardiology,Dept Cardiological Thoracic and Vascular Sciences, Padua University, Padova, Italy
| | - R Marcolongo
- University of Padova, Hematology and Clinical Immunology, Department of Medicine, Padua, Italy
| | - C Y Cheng
- Cardiology,Dept Cardiological Thoracic and Vascular Sciences, Padua University, Padova, Italy
| | - S Gianstefani
- Cardiology,Dept Cardiological Thoracic and Vascular Sciences, Padua University, Padova, Italy
| | - A Baritussio
- Cardiology,Dept Cardiological Thoracic and Vascular Sciences, Padua University, Padova, Italy
| | - M Seguso
- University of Padova, Department of Laboratory Medicine, Padua, Italy
| | - N Gallo
- University of Padova, Department of Laboratory Medicine, Padua, Italy
| | - L Leoni
- Cardiology,Dept Cardiological Thoracic and Vascular Sciences, Padua University, Padova, Italy
| | - S Rizzo
- University of Padova, Cardiac pathology, Dept Cardiological Thoracic and Vascular Sciences, Padua, Italy
| | - M Perazzolo Marra
- Cardiology,Dept Cardiological Thoracic and Vascular Sciences, Padua University, Padova, Italy
| | - G P Tarantini
- Cardiology,Dept Cardiological Thoracic and Vascular Sciences, Padua University, Padova, Italy
| | - M Plebani
- University of Padova, Department of Laboratory Medicine, Padua, Italy
| | - C Y Basso
- University of Padova, Cardiac pathology, Dept Cardiological Thoracic and Vascular Sciences, Padua, Italy
| | - S Iliceto
- Cardiology,Dept Cardiological Thoracic and Vascular Sciences, Padua University, Padova, Italy
| |
Collapse
|
13
|
Paiardini A, Mantoni F, Giardina G, Paone A, Janson G, Leoni L, Rampioni G, Cutruzzolà F, Rinaldo S. A novel bacterial l-arginine sensor controlling c-di-GMP levels in Pseudomonas aeruginosa. Proteins 2018; 86:1088-1096. [PMID: 30040157 DOI: 10.1002/prot.25587] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 07/17/2018] [Accepted: 07/18/2018] [Indexed: 01/16/2023]
Abstract
Nutrients such as amino acids play key roles in shaping the metabolism of microorganisms in natural environments and in host-pathogen interactions. Beyond taking part to cellular metabolism and to protein synthesis, amino acids are also signaling molecules able to influence group behavior in microorganisms, such as biofilm formation. This lifestyle switch involves complex metabolic reprogramming controlled by local variation of the second messenger 3', 5'-cyclic diguanylic acid (c-di-GMP). The intracellular levels of this dinucleotide are finely tuned by the opposite activity of dedicated diguanylate cyclases (GGDEF signature) and phosphodiesterases (EAL and HD-GYP signatures), which are usually allosterically controlled by a plethora of environmental and metabolic clues. Among the genes putatively involved in controlling c-di-GMP levels in P. aeruginosa, we found that the multidomain transmembrane protein PA0575, bearing the tandem signature GGDEF-EAL, is an l-arginine sensor able to hydrolyse c-di-GMP. Here, we investigate the basis of arginine recognition by integrating bioinformatics, molecular biophysics and microbiology. Although the role of nutrients such as l-arginine in controlling the cellular fate in P. aeruginosa (including biofilm, pathogenicity and virulence) is already well established, we identified the first l-arginine sensor able to link environment sensing, c-di-GMP signaling and biofilm formation in this bacterium.
Collapse
Affiliation(s)
- A Paiardini
- Department of Biochemical Sciences "A. Rossi Fanelli", Sapienza University of Rome (I), Roma, Italy.,Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Roma, Italy
| | - F Mantoni
- Department of Biochemical Sciences "A. Rossi Fanelli", Sapienza University of Rome (I), Roma, Italy.,Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Roma, Italy
| | - G Giardina
- Department of Biochemical Sciences "A. Rossi Fanelli", Sapienza University of Rome (I), Roma, Italy.,Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Roma, Italy
| | - A Paone
- Department of Biochemical Sciences "A. Rossi Fanelli", Sapienza University of Rome (I), Roma, Italy
| | - G Janson
- Department of Biochemical Sciences "A. Rossi Fanelli", Sapienza University of Rome (I), Roma, Italy
| | - L Leoni
- Department of Science, University Roma Tre (I), Roma, Italy
| | - G Rampioni
- Department of Science, University Roma Tre (I), Roma, Italy
| | - F Cutruzzolà
- Department of Biochemical Sciences "A. Rossi Fanelli", Sapienza University of Rome (I), Roma, Italy.,Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Roma, Italy
| | - S Rinaldo
- Department of Biochemical Sciences "A. Rossi Fanelli", Sapienza University of Rome (I), Roma, Italy.,Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Roma, Italy
| |
Collapse
|
14
|
Ferretto S, Bozic F, Corrado D, Leoni L. P1156Autonomic nervous system modulation during cryoballon ablation as a prognostic indicator of ablation success in patients with paroxysmal atrial fibrillation. Europace 2018. [DOI: 10.1093/europace/euy015.642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- S Ferretto
- University Hospital of Padova, Cardiac, Vascular and Thoracic Science, Padua, Italy
| | - F Bozic
- University Hospital of Padova, Cardiac, Vascular and Thoracic Science, Padua, Italy
| | - D Corrado
- University Hospital of Padova, Cardiac, Vascular and Thoracic Science, Padua, Italy
| | - L Leoni
- University Hospital of Padova, Cardiac, Vascular and Thoracic Science, Padua, Italy
| |
Collapse
|
15
|
Ferretto S, Testolina M, Nguyen K, Martin M, Susana A, Migliore F, Iliceto S, Leoni L, Bertaglia E. P1234Pocket complications after device-based therapy in patients with chronic heart failure. Europace 2018. [DOI: 10.1093/europace/euy015.715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- S Ferretto
- University Hospital of Padova, Cardiac, Vascular and Thoracic Science, Padua, Italy
| | - M Testolina
- University Hospital of Padova, Cardiac, Vascular and Thoracic Science, Padua, Italy
| | - K Nguyen
- University Hospital of Padova, Cardiac, Vascular and Thoracic Science, Padua, Italy
| | - M Martin
- University Hospital of Padova, Cardiac, Vascular and Thoracic Science, Padua, Italy
| | - A Susana
- University Hospital of Padova, Cardiac, Vascular and Thoracic Science, Padua, Italy
| | - F Migliore
- University Hospital of Padova, Cardiac, Vascular and Thoracic Science, Padua, Italy
| | - S Iliceto
- University Hospital of Padova, Cardiac, Vascular and Thoracic Science, Padua, Italy
| | - L Leoni
- University Hospital of Padova, Cardiac, Vascular and Thoracic Science, Padua, Italy
| | - E Bertaglia
- University Hospital of Padova, Cardiac, Vascular and Thoracic Science, Padua, Italy
| |
Collapse
|
16
|
Ferretto S, Pellizzari F, Valerio E, Milanesi O, Leoni L. P495Wolff-Parkinson-White: clinical management and follow up of symptomatic and asymptomatic pediatric patients. Europace 2017. [DOI: 10.1093/ehjci/eux141.217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
17
|
Padeletti L, Arena G, Iacopino S, Tondo C, Curnis A, Lunati M, Senatore G, Manfrin M, Sciarra L, Porcellini S, Mantica M, Leoni L, Molon G, Verlato R. P896Are Peri-procedural complications and outcomes after cryoballoon ablation of paroxysmal atrial fibrillation influenced by center expertise (high volume vs low volume)? Europace 2017. [DOI: 10.1093/ehjci/eux151.078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
18
|
Hadas D, Maschietto N, Ferretto S, Castaldi B, Quinto L, Milanesi O, Leoni L. P1503The first successful permanent pacemaker implantation via the left superior vena-cava to a collateral of the coronary sinus leading to the left ventricle in a lateral tunnel fontan patient. Europace 2017. [DOI: 10.1093/ehjci/eux158.129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
19
|
Pawar SV, Messina M, Rinaldo S, Cutruzzolà F, Kaever V, Rampioni G, Leoni L. Novel genetic tools to tackle c-di-GMP-dependent signalling in Pseudomonas aeruginosa. J Appl Microbiol 2016; 120:205-17. [PMID: 26497534 DOI: 10.1111/jam.12984] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 10/01/2015] [Accepted: 10/09/2015] [Indexed: 11/30/2022]
Abstract
AIMS To develop new genetic tools for studying 3',5'-cyclic diguanylic acid (c-di-GMP) signalling in Pseudomonas aeruginosa. METHODS AND RESULTS Plasmid pPcdrA::lux, carrying a transcriptional fusion between the c-di-GMP responsive promoter PcdrA and the luxCDABE reporter genes, has been generated and validated in purpose-built P. aeruginosa strains in which c-di-GMP levels can be increased or reduced upon arabinose-dependent induction of c-di-GMP synthetizing or degrading enzymes. CONCLUSIONS The reporter systems described so far were able to detect a decrease in the c-di-GMP levels only in engineered strains overproducing c-di-GMP. Conversely, pPcdrA::lux could be used for studying any process or chemical compound expected to cause both an increase or a decrease with respect to the c-di-GMP levels produced by wild type P. aeruginosa. Another relevant aspect of this study has been the development of novel and improved genetic devices for the fine arabinose-dependent control of c-di-GMP levels in P. aeruginosa. SIGNIFICANCE AND IMPACT OF THE STUDY The genetic tools developed and validated in this study could facilitate investigations tackling the c-di-GMP signalling process on different fields, from cellular physiology to drug-discovery research.
Collapse
Affiliation(s)
| | - M Messina
- Department of Science, University Roma Tre, Rome, Italy
| | - S Rinaldo
- Istituto Pasteur-Fondazione Cenci Bolognetti, Department of Biochemical Sciences, Sapienza University of Rome, Rome, Italy
| | - F Cutruzzolà
- Istituto Pasteur-Fondazione Cenci Bolognetti, Department of Biochemical Sciences, Sapienza University of Rome, Rome, Italy
| | - V Kaever
- Research Core Unit Metabolomics, Institute of Pharmacology, Hannover Medical School, Hannover, Germany
| | - G Rampioni
- Department of Science, University Roma Tre, Rome, Italy
| | - L Leoni
- Department of Science, University Roma Tre, Rome, Italy
| |
Collapse
|
20
|
Costabile G, d'Angelo I, d'Emmanuele di Villa Bianca R, Mitidieri E, Pompili B, Del Porto P, Leoni L, Visca P, Miro A, Quaglia F, Imperi F, Sorrentino R, Ungaro F. Development of inhalable hyaluronan/mannitol composite dry powders for flucytosine repositioning in local therapy of lung infections. J Control Release 2016; 238:80-91. [DOI: 10.1016/j.jconrel.2016.07.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Revised: 07/12/2016] [Accepted: 07/17/2016] [Indexed: 11/28/2022]
|
21
|
Abstract
1. The aim of this study was to identify the most relevant welfare indicators for unloading, lairage, stunning, killing and post-mortem inspection in a poultry slaughter plant. Different indicators were unloading duration, lairage time, environmental variables in the lairage facilities, shackling time and electrical variables used in the water bath. 2. Lairage time did not correlate strongly with dead on arrival. Heat stress was limited by means of ventilation systems, correct cage placement and appropriate stocking density per crate. The acceptable shackling period was about 30 s. 3. The presence of a corneal reflex showed that an animal was alive, while spontaneous wing flapping, spontaneous eye blinking and response to a painful stimulus were regarded as indicators of stunning efficiency. 4. It was concluded that the presence of recent traumatic injuries during the post-mortem inspection could be a valid means to establish whether corrective measures concerning the handling, transport and loading procedures should be taken.
Collapse
Affiliation(s)
- C Grilli
- a School of Biosciences and Veterinary Medicine , University of Camerino , Matelica , Italy
| | | | | | | | | | | |
Collapse
|
22
|
Piffaretti F, Barrettino D, Orsatti P, Leoni L, Stegmaier P. Rollable and implantable intraocular pressure sensor for the continuous adaptive management of glaucoma. Annu Int Conf IEEE Eng Med Biol Soc 2013; 2013:3198-201. [PMID: 24110408 DOI: 10.1109/embc.2013.6610221] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We designed and tested a new rollable and implantable medical device to directly and continuously measure intraocular pressure. Since high intraocular pressure is a leading risk factor for glaucoma, such a system could solve the difficulties encountered in the management of this condition. In fact, glaucoma is one among those pathologies that could most benefit of an adaptive patient-specific medicine device. The presented prototype was realized with standard industrial microelectronic technologies (Flip-Chip on Kapton flexible PCB) and off-the-shelf IC components. Detailed system description and measurements, obtained during in-vitro and laboratory characterizations, are reported.
Collapse
|
23
|
Brady AL, Druschel G, Leoni L, Lim DSS, Slater GF. Isotopic biosignatures in carbonate-rich, cyanobacteria-dominated microbial mats of the Cariboo Plateau, B.C. Geobiology 2013; 11:437-456. [PMID: 23941467 DOI: 10.1111/gbi.12050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Accepted: 07/09/2013] [Indexed: 06/02/2023]
Abstract
Photosynthetic activity in carbonate-rich benthic microbial mats located in saline, alkaline lakes on the Cariboo Plateau, B.C. resulted in pCO2 below equilibrium and δ(13) CDIC values up to +6.0‰ above predicted carbon dioxide (CO2 ) equilibrium values, representing a biosignature of photosynthesis. Mat-associated δ(13) Ccarb values ranged from ~4 to 8‰ within any individual lake, with observations of both enrichments (up to 3.8‰) and depletions (up to 11.6‰) relative to the concurrent dissolved inorganic carbon (DIC). Seasonal and annual variations in δ(13) C values reflected the balance between photosynthetic (13) C-enrichment and heterotrophic inputs of (13) C-depleted DIC. Mat microelectrode profiles identified oxic zones where δ(13) Ccarb was within 0.2‰ of surface DIC overlying anoxic zones associated with sulphate reduction where δ(13) Ccarb was depleted by up to 5‰ relative to surface DIC reflecting inputs of (13) C-depleted DIC. δ(13) C values of sulphate reducing bacteria biomarker phospholipid fatty acids (PLFA) were depleted relative to the bulk organic matter by ~4‰, consistent with heterotrophic synthesis, while the majority of PLFA had larger offsets consistent with autotrophy. Mean δ(13) Corg values ranged from -18.7 ± 0.1 to -25.3 ± 1.0‰ with mean Δ(13) Cinorg-org values ranging from 21.1 to 24.2‰, consistent with non-CO2 -limited photosynthesis, suggesting that Precambrian δ(13) Corg values of ~-26‰ do not necessitate higher atmospheric CO2 concentrations. Rather, it is likely that the high DIC and carbonate content of these systems provide a non-limiting carbon source allowing for expression of large photosynthetic offsets, in contrast to the smaller offsets observed in saline, organic-rich and hot spring microbial mats.
Collapse
Affiliation(s)
- A L Brady
- School of Geography and Earth Sciences, McMaster University, Hamilton, ON, Canada
| | | | | | | | | |
Collapse
|
24
|
Werner W, Herold M, Ruffert K, Merkle K, Brakhage A, Leoni L, Cheson BD. Entwicklungsgeschichte: Bendamustin gestern, heute, morgen. ACTA ACUST UNITED AC 2013; 36 Suppl 1:2-10. [DOI: 10.1159/000346104] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
25
|
Cheson BD, Leoni L. Bendamustine: mechanism of action and clinical data. Clin Adv Hematol Oncol 2011; 9:1-11. [PMID: 22362008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Bendamustine is a chemotherapeutic agent that displays a unique pattern of cytotoxicity compared with conventional alkylating agents. Bendamustine was originally synthesized in the former East German Democratic Republic in the 1960s. It was designed to have both alkylating and antimetabolite properties. The alkylating agent properties are similar to those seen with cyclophosphamide, chlorambucil, and melphalan, and the benzimidazole ring is similar to cladribine. Molecular analyses have revealed that bendamustine differs from other alkylating agents in its mechanism of action. Differences have been observed in regard to its effects on DNA repair and cell cycle progression. Moreover, bendamustine can induce cell death through both apoptotic and nonapoptotic pathways, thereby retaining activity even in cells without a functional apoptotic pathway. Bendamustine has demonstrated significant efficacy in patients with indolent lymphomas and chronic lymphocytic leukemia (CLL), including in patients with disease refractory to conventional alkylating agents and rituximab. The toxicity profile of bendamustine is also superior to that of conventional alkylating agents. Combination therapy with bendamustine and rituximab has demonstrated superior efficacy to a standard rituximab-containing chemotherapy regimen in patients with previously untreated indolent B-cell non-Hodgkin lymphoma, and it is currently being compared against the standard first-line regimen in CLL: fludarabine, cyclophosphamide, and rituximab. Ongoing and planned studies are evaluating new strategies in which bendamustine is being combined with existing agents and with novel therapies to optimize use in different clinical settings.
Collapse
Affiliation(s)
- Bruce D Cheson
- Division of Hematology-Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Hospital, Washington, DC, USA
| | | |
Collapse
|
26
|
Folino AF, Chiusso F, Zanotto G, Vaccari D, Gasparini G, Megna A, Marras E, Mantovan R, Vaglio A, Boscolo G, Biancalana G, Leoni L, Iliceto S, Buja G. Management of alert messages in the remote monitoring of implantable cardioverter defibrillators and pacemakers: an Italian single-region study. Europace 2011; 13:1281-91. [DOI: 10.1093/europace/eur154] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
27
|
Korkina L, Trakhtman P, De Luca C, Leoni L, Raskovic D, Pastore S. Efficacy and safety of biologicals against immune-mediated diseases: do benefits outweigh risks? Drugs Today (Barc) 2010; 46:119-36. [PMID: 20393640 DOI: 10.1358/dot.2010.46.2.1452078] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The success of molecular biology in identifying molecular pathways underlying chronic immune-mediated diseases and the rapid development of gene/cell engineering biotechnologies has resulted in the development of a number of targeted biological drugs, which have revolutionized the therapy of these diseases. Numerous data published over the last 10-15 years demonstrate a dramatic improvement in the clinical efficacy of biologics compared with conventional drugs. However, professional and public concern about serious biological drug-associated adverse events has also been growing steadily. We critically analyze recent literature on the efficacy and safety of biologics in the management of rheumatoid arthritis, psoriasis, psoriatic arthritis and immune thrombocytopenia. Our analysis of benefits, resistance to the therapy, risk of infections, tumors and other serious complications related to chronic administration of biologics is based on the molecular/cellular mechanisms of their interaction with the immune system. We also address whether it is feasible to attenuate the risks associated with biologics without limiting their benefits.
Collapse
Affiliation(s)
- Liudmika Korkina
- Lab. Tissue Engineering & Skin Pathophysiology, Instituto Dermopatico dell'Immacolata (IDI IRCCS), Rome, Italy.
| | | | | | | | | | | |
Collapse
|
28
|
Leoni L, Roman B. MR Imaging of Pancreatic Islets: Tracking Isolation, Transplantation and Function. Curr Pharm Des 2010; 16:1582-94. [DOI: 10.2174/138161210791164171] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2009] [Accepted: 01/18/2010] [Indexed: 11/22/2022]
|
29
|
Arentsen H, Hulsbergen-van de Kaa C, Jansen K, Maj R, Leoni L, Oosterwijk E, Witjes F. 978 PHARMACOKINETICS AND TOXICITY OF INTRAVESICAL TMX-101: A PRECLINICAL STUDY IN PIGS. J Urol 2010. [DOI: 10.1016/j.juro.2010.02.1925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
30
|
Hayashi T, Crain B, Corr M, Chan M, Cottam HB, Maj R, Barberis A, Leoni L, Carson DA. Intravesical Toll-like receptor 7 agonist R-837: optimization of its formulation in an orthotopic mouse model of bladder cancer. Int J Urol 2010; 17:483-90. [PMID: 20337728 DOI: 10.1111/j.1442-2042.2010.02503.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To study the immune response caused by the intravesical administration of the immunomodulator R-837 in various formulations and to estimate its therapeutic potential for bladder cancer. METHODS Female C57BL/6 mice were intravesically treated with different formulations of R-837, a Toll-like receptor 7 agonist used for treating genital warts and skin malignancy. The tested formulation mixtures contained different ratios of lactic acid, a thermosensitive poloxamer polymer (Lutrol F127) and 2-(hydroxypropyl)-beta-cyclodextrin (HPbetaCD). Induction of tumor necrosis factor alpha (TNFalpha) and keratinocyte-derived chemokine (KC) was analyzed by Luminex microbeads assay. The therapeutic potential of intravesical administration of R-837 was assessed in an orthotopic, syngeneic mouse model of bladder cancer using MB49 cells. RESULTS Intravesical administration of R-837 in lactic acid alone induced systemic and bladder TNFalpha and KC in a dose-dependent manner. Formulations including poloxamer decreased systemic absorption of R-837 and significantly reduced systemic and local induction of KC. Addition of HPbetaCD in the poloxamer formulation particularly reversed levels of systemic and local levels of TNFalpha and KC. Histological examination showed that poloxamer-HPbetaCD formulation allowed infiltration of mononuclear cells into urothelium and lamina propria. In studies using orthotopic mouse bladder cancer, the tumor loads in R-837-treated mice were significantly lower than those in vehicle-treated or non-treated mice. CONCLUSION The optimized poloxamer-HPbetaCD formulation of R-837 shows therapeutic potential for bladder cancer while avoiding adverse side-effects.
Collapse
Affiliation(s)
- Tomoko Hayashi
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093-0820, USA.
| | | | | | | | | | | | | | | | | |
Collapse
|
31
|
|
32
|
Sampogna F, Raskovic D, Guerra L, Pedicelli C, Tabolli S, Leoni L, Alessandroni L, Abeni D. Identification of categories at risk for high quality of life impairment in patients with vitiligo. Br J Dermatol 2008; 159:351-9. [DOI: 10.1111/j.1365-2133.2008.08678.x] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
33
|
Behari J, Zeng G, Otruba W, Thompson MD, Muller P, Micsenyi A, Sekhon SS, Leoni L, Monga SPS. R-Etodolac decreases beta-catenin levels along with survival and proliferation of hepatoma cells. J Hepatol 2007; 46:849-57. [PMID: 17275129 PMCID: PMC1924913 DOI: 10.1016/j.jhep.2006.11.017] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2006] [Revised: 11/21/2006] [Accepted: 11/24/2006] [Indexed: 02/02/2023]
Abstract
BACKGROUND/AIMS Inhibition of hepatoma cells by cyclooxygenase (COX)-2-dependent and -independent mechanisms has been shown previously. Here, we examine the effect of Celecoxib, a COX-2-inhibitor and R-Etodolac, an enantiomer of the nonsteroidal anti-inflammatory drug Etodolac, which lacks COX-inhibitory activity, on the Wnt/beta-catenin pathway and human hepatoma cells. METHODS Hep3B and HepG2 cell lines were treated with Celecoxib or R-Etodolac, and examined for viability, DNA synthesis, Wnt/beta-catenin pathway components, and downstream target gene expression. RESULTS Celecoxib at high doses affected beta-catenin protein by inducing its degradation via GSK3beta and APC along with diminished tumor cell proliferation and survival. R-Etodolac at physiological doses caused decrease in total and activated beta-catenin protein secondary to decrease in its gene expression and post-translationally through GSK3beta activation. In addition, increased beta-catenin-E-cadherin was also observed at the membrane. An associated inhibition of beta-catenin-dependent Tcf reporter activity, decreased levels of downstream target gene products glutamine synthetase and cyclin-D1, and decreased proliferation and survival of hepatoma cells was evident. CONCLUSIONS The antitumor effects of Celecoxib (at high concentrations) and R-Etodolac (at physiological doses) on HCC cells were accompanied by the down-regulation of beta-catenin demonstrating a useful therapeutic strategy in hepatocellular cancer.
Collapse
Affiliation(s)
- Jaideep Behari
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Lindhagen E, Rickardson L, Elliott G, Leoni L, Nygren P, Larsson R, Aleskog A. Pharmacological profiling of novel non-COX-inhibiting indole-pyran analogues of etodolac reveals high solid tumour activity of SDX-308 in vitro. Invest New Drugs 2007; 25:297-303. [PMID: 17440681 DOI: 10.1007/s10637-007-9049-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2006] [Accepted: 03/21/2007] [Indexed: 10/23/2022]
Abstract
SDX-308 and SDX-309 are potent indole-pyran analogues of SDX-101 (R-etodolac) which has anti-tumour activity unrelated to cyclooxygenase-2 inhibition. Their cytotoxic activity was further studied herein using a well-characterized human tumour cell-line panel containing ten cell lines, as well as in 58 primary tumour cell samples from a variety of diagnoses. The indole-pyran analogues of SDX-101 were in general considerably more active in both cancer cell lines and primary tumour samples. Low cross-reactivity with standard agents was observed, indicating a unique mechanism of action. No apparent influence on efficacy was observed via classical mechanisms of multidrug-resistance. SDX-101 and SDX-309 showed higher relative activity in haematological compared to solid tumour samples, while SDX-308 had pronounced solid-tumour activity. High SDX-308 cytotoxic efficacy was observed in non-small cell lung cancer, renal cancer and ovarian cancer samples, and also in chronic lymphocytic leukaemia. In conclusion, the indole-pyran analogues showed a favourable pharmacological profile and represent a potentially important new class of drugs for cancer treatment.
Collapse
|
35
|
Lindhagen E, Nissle S, Leoni L, Elliott G, Chao Q, Larsson R, Aleskog A. R-etodolac (SDX-101) and the related indole-pyran analogues SDX-308 and SDX-309 potentiate the antileukemic activity of standard cytotoxic agents in primary chronic lymphocytic leukaemia cells. Cancer Chemother Pharmacol 2006; 60:545-53. [PMID: 17186240 DOI: 10.1007/s00280-006-0400-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2006] [Accepted: 11/28/2006] [Indexed: 10/23/2022]
Abstract
OBJECTIVE SDX-101 is the non-cyclooxygenase 2-inhibiting R-enantiomer of the non-steroid anti-inflammatory drug etodolac, and has anti-tumour activity in chronic lymphocytic leukaemia (CLL). SDX-308 and SDX-309 are more potent, structurally related indole-pyran analogues of SDX-101. The current study was performed to investigate and quantify the cytotoxic potentiating effects resulting from a combination of either SDX-101, SDX-308 or SDX-309 with standard cytotoxic agents used in the CLL treatment today. METHODS The lymphoma cell line U937-gtb was used, together with primary tumour cells isolated from seven CLL patients. Combinations between chlorambucil and each one of the agents etodolac, SDX-101, SDX-308 and SDX-309 were studied. In addition, SDX-309 was combined with fludarabine, doxorubicin or vincristine. Both simultaneous and sequential exposures were explored using the median-effect method. RESULTS Most combinations were additive, which could be of clinical benefit since SDX-101 has been shown to be well tolerated. At the 70% effect level, synergy was observed between SDX-308 and chlorambucil in U937-gtb cells and in two-third of the CLL samples. Since chlorambucil is the most important drug in CLL therapy today and SDX-308 is presently targeted as the lead clinical candidate, this combination would be interesting for further studies. Vincristine and SDX-309 were synergistic in two-fourth of CLL samples. CONCLUSIONS To conclude, the non-COX-inhibiting etodolac-derivatives SDX-101, SDX-308 and SDX-309 are potential candidates for combination treatment of CLL. Especially, SDX-308 in combination with chlorambucil warrants further evaluation.
Collapse
Affiliation(s)
- Elin Lindhagen
- Division of Clinical Pharmacology, Uppsala University, Uppsala, Sweden.
| | | | | | | | | | | | | |
Collapse
|
36
|
Feng R, Anderson G, Xiao G, Elliott G, Leoni L, Mapara MY, Roodman GD, Lentzsch S. SDX-308, a nonsteroidal anti-inflammatory agent, inhibits NF-kappaB activity, resulting in strong inhibition of osteoclast formation/activity and multiple myeloma cell growth. Blood 2006; 109:2130-8. [PMID: 17095620 DOI: 10.1182/blood-2006-07-027458] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Multiple myeloma is characterized by increased osteoclast activity that results in bone destruction and lytic lesions. With the prolonged overall patient survival achieved by new treatment modalities, additional drugs are required to inhibit bone destruction. We focused on a novel and more potent structural analog of the nonsteroidal anti-inflammatory drug etodolac, known as SDX-308, and its effects on osteoclastogenesis and multiple myeloma cells. SDX-101 is another structural analog of etodolac that is already used in clinical trials for the treatment of B-cell chronic lymphocytic leukemia (B-CLL). Compared with SDX-101, a 10-fold lower concentration of SDX-308 induced potent (60%-80%) inhibition of osteoclast formation, and a 10- to 100-fold lower concentration inhibited multiple myeloma cell proliferation. Bone resorption was completely inhibited by SDX-308, as determined in dentin-based bone resorption assays. SDX-308 decreased constitutive and RANKL-stimulated NF-kappaB activation and osteoclast formation in an osteoclast cellular model, RAW 264.7. SDX-308 effectively suppressed TNF-alpha-induced IKK-gamma and IkappaB-alpha phosphorylation and degradation and subsequent NF-kappaB activation in human multiple myeloma cells. These results indicate that SDX-308 effectively inhibits multiple myeloma cell proliferation and osteoclast activity, potentially by controlling NF-kappaB activation signaling. We propose that SDX-308 is a promising therapeutic candidate to inhibit multiple myeloma growth and osteoclast activity and that it should receive attention for further study.
Collapse
Affiliation(s)
- Rentian Feng
- Division of Hematology/Oncology, University of Pittsburgh Cancer Institute, PA 15232, USA
| | | | | | | | | | | | | | | |
Collapse
|
37
|
Marcé S, Balagué O, Colomo L, Martinez A, Höller S, Villamor N, Bosch F, Ott G, Rosenwald A, Leoni L, Esteller M, Fraga MF, Montserrat E, Colomer D, Campo E. Lack of methylthioadenosine phosphorylase expression in mantle cell lymphoma is associated with shorter survival: implications for a potential targeted therapy. Clin Cancer Res 2006; 12:3754-61. [PMID: 16778103 DOI: 10.1158/1078-0432.ccr-05-2780] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE To determine the methylthioadenosine phosphorylase (MTAP) gene alterations in mantle cell lymphoma (MCL) and to investigate whether the targeted inactivation of the alternative de novo AMP synthesis pathway may be a useful therapeutic strategy in tumors with inactivation of this enzyme. EXPERIMENTAL DESIGN MTAP gene deletion and protein expression were studied in 64 and 52 primary MCL, respectively, and the results were correlated with clinical behavior. Five MCL cell lines were analyzed for MTAP expression and for the in vitro sensitivity to L-alanosine, an inhibitor of adenylosuccinate synthetase, and hence de novo AMP synthesis. RESULTS No protein expression was detected in 8 of 52 (15%) tumors and one cell line (Granta 519). Six of these MTAP negative tumors and Granta 519 cell line had a codeletion of MTAP and p16 genes; one case showed a deletion of MTAP, but not p16, and one tumor had no deletions in neither of these genes. Patients with MTAP deletions had a significant shorter overall survival (mean, 16.1 months) than patients with wild-type MTAP (mean, 63.6 months; P < 0.0001). L-Alanosine induced cytotoxicity and activation of the intrinsic mitochondrial-dependent apoptotic pathway in MCL cells. 9-beta-D-Erythrofuranosyladenine, an analogue of 5'-methylthioadenosine, selectively rescued MTAP-positive cells from L-alanosine toxicity. CONCLUSIONS MTAP gene deletion and lack of protein expression are associated with poor prognosis in MCL and might identify patients who might benefit from treatment with de novo AMP synthesis pathway-targeted therapies.
Collapse
MESH Headings
- Base Sequence
- Cell Line, Tumor
- Chromosomes, Human, Pair 11
- Chromosomes, Human, Pair 14
- DNA Primers
- Gene Expression Regulation, Enzymologic
- Gene Expression Regulation, Neoplastic
- Humans
- Lymphoma, Mantle-Cell/enzymology
- Lymphoma, Mantle-Cell/genetics
- Lymphoma, Mantle-Cell/mortality
- Lymphoma, Mantle-Cell/pathology
- Purine-Nucleoside Phosphorylase/deficiency
- Purine-Nucleoside Phosphorylase/genetics
- Retrospective Studies
- Survival Analysis
- Time Factors
- Translocation, Genetic
Collapse
Affiliation(s)
- Silvia Marcé
- Pathology Department, Hematopathology Unit, Hospital Clinic, Institut d'Investigacions Biomèdiques August Pi i Sunyer, University of Barcelona, Barcelona, Spain
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Milani M, Leoni L, Rampioni G, Zennaro E, Ascenzi P, Bolognesi M. The 'active-like' structure of the unphosphorylated response regulator StyR. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305090069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
39
|
Leoni L, Niemeyer C, Bendall H. Genomics, Signaling and Tumor Targeting--Sidney Kimmel Cancer Center Inaugural Conference. 16-18 February 2004, San Diego, CA, USA. IDrugs 2004; 7:312-4. [PMID: 15057632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Affiliation(s)
- Lorenzo Leoni
- Salmedix Inc, 9380 Judicial Drive, San Diego, CA 92121, USA.
| | | | | |
Collapse
|
40
|
Illeil PB, Leoni L, Huang W, Astrow S, Cheeks A, Rusch V, Ladanvi M. O-29 The methylthioadenosine phosphorylase (MTAP) gene is homozygously co-deleted with CDKN2A in most pleural mesotheliomas. Detection by fluorescent in situ hybridization (FISH) and by immunohistochemistry (IHC) using a novel MTAP monoclonal antibody. Lung Cancer 2003. [DOI: 10.1016/s0169-5002(03)91687-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
41
|
Zaunders JJ, Moutouh-de Parseval L, Kitada S, Reed JC, Rought S, Genini D, Leoni L, Kelleher A, Cooper DA, Smith DE, Grey P, Estaquier J, Little S, Richman DD, Corbeil J. Polyclonal proliferation and apoptosis of CCR5+ T lymphocytes during primary human immunodeficiency virus type 1 infection: regulation by interleukin (IL)-2, IL-15, and Bcl-2. J Infect Dis 2003; 187:1735-47. [PMID: 12751031 DOI: 10.1086/375030] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2002] [Accepted: 12/30/2002] [Indexed: 11/04/2022] Open
Abstract
We measured apoptosis of subsets of T lymphocytes by single-cell analysis of caspase activation, to confirm high turnover of chemokine receptor CCR5(+) T cells in subjects with acute, primary human immunodeficiency virus type 1 (HIV-1) infection (PHI). High levels of spontaneous apoptosis, consisting mainly of CD8(+) T lymphocytes, were closely associated with increases in the activation markers Ki-67, CD38, and the HIV coreceptor CCR5 and with decreases in Bcl-2 and the interleukin (IL)-7 receptor at the single-cell level. Increased expression of Ki-67 and CCR5 ex vivo, as well as increased apoptosis, was seen in all T cell receptor beta-chain variable region (TCRBV) subfamilies studied. The addition of IL-2 or IL-15, but not IL-7, significantly inhibited caspase activation, increased Bcl-2 expression, and rapidly initiated proliferation in vitro of CD8(+) T cells expressing CCR5 and multiple TCRBV subfamilies. Furthermore, IL-15 receptor alpha-chain messenger RNA levels were increased in peripheral blood mononuclear cells during PHI. These results suggest that CCR5(+)Ki-67(+)Bcl-2(dim) activated T cells generated during PHI traffic via blood to tissue sites, where the cells may survive and/or further proliferate under the local influence of IL-2 or IL-15. Understanding cytokine effects on CCR5(+) T cells will be important in understanding chronic HIV-1 replication and pathogenesis.
Collapse
Affiliation(s)
- John J Zaunders
- Centre for Immunology, St. Vincent's Hospital, Darlinghurst, New South Wales, Australia
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Rhee CS, Sen M, Lu D, Wu C, Leoni L, Rubin J, Corr M, Carson DA. Wnt and frizzled receptors as potential targets for immunotherapy in head and neck squamous cell carcinomas. Oncogene 2002; 21:6598-605. [PMID: 12242657 DOI: 10.1038/sj.onc.1205920] [Citation(s) in RCA: 148] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2002] [Revised: 07/30/2002] [Accepted: 07/31/2002] [Indexed: 12/20/2022]
Abstract
The diverse receptor-ligand pairs of the Wnt and frizzled (Fz) families play important roles during embryonic development, and thus may be overexpressed in cancers that arise from immature cells. Hence, we investigated the expression and function of five Wnt (Wnt-1, 5a, 7a, 10b, 13) and two Fz (Fz-2, 5) genes in 10 head and neck squamous carcinoma cell lines (HNSCC). In comparison to normal bronchial or oral epithelial cells, all the HNSCC had markedly increased mRNA levels of Wnt-1, 7a, 10b, and 13, as well as Fz-2. Moreover, the levels of Wnt-1, 10b, and Fz-2 proteins were also markedly increased in HNSCC, relative to normal epithelial cells. Treatment of one HNSCC cell line (SNU 1076) with anti-Wnt-1 antibodies reduced the activity of the Wnt/Fz dependent transcription factor LEF/TCF, and diminished the expression of cyclin D1 and beta-catenin proteins. Blocking Wnt-1 signaling also inhibited proliferation and induced apoptosis in these cells. These results show that HNSCC cell lines often overexpress one or more Wnt and Fz genes, and suggest that the growth and survival of a subset of HNSCC may depend on the Wnt/Fz pathway. Hence, the Wnt and Fz receptors may be possible targets for immunotherapy therapy of this common cancer.
Collapse
Affiliation(s)
- Chae-Seo Rhee
- Department of Medicine and The Sam and Rose Stein Institute for Research on Aging, University of California San Diego, La Jolla, California, CA 92093-0663, USA
| | | | | | | | | | | | | | | |
Collapse
|
43
|
Pioletti DP, Leoni L, Genini D, Takei H, Du P, Corbeil J. Gene expression analysis of osteoblastic cells contacted by orthopedic implant particles. J Biomed Mater Res 2002; 61:408-20. [PMID: 12115466 DOI: 10.1002/jbm.10218] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Particles generated from orthopedic implants through years of wear play an essential role in the aseptic loosening of a prosthesis. We have investigated the biocompatibility of these orthopedic particles on different osteoblast-like cells representative of different stages of osteoblast maturation. We found the particles induced a caspase-dependent apoptosis of osteoblasts, with less mature osteoblasts being the most susceptible. An analysis of gene expression was performed on the less mature osteoblasts, which were in contact with the particles. We found that the particles had a profound impact on genes that code for inflammatory cytokines and genes involved in controlling the nuclear architecture. Results from this study suggest that the peri-implant osteolysis after a total joint replacement can be due in part to a decrease of bone formation and not solely to an overstimulation of bone resorption as is generally proposed. Development of new drugs that promote normal bone formation and osteoblast survival would possibly control peri-implant osteolysis, resulting in a better prognosis for patients with orthopedic implants.
Collapse
Affiliation(s)
- Dominique P Pioletti
- Department of Bioengineering, University of California San Diego, 9500 Gilman Drive, La Jolla 92093, USA.
| | | | | | | | | | | |
Collapse
|
44
|
Ojo-Amaize EA, Nchekwube EJ, Cottam HB, Bai R, Verdier-Pinard P, Kakkanaiah VN, Varner JA, Leoni L, Okogun JI, Adesomoju AA, Oyemade OA, Hamel E. Hypoestoxide, a natural nonmutagenic diterpenoid with antiangiogenic and antitumor activity: possible mechanisms of action. Cancer Res 2002; 62:4007-14. [PMID: 12124334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
We have shown previously that hypoestoxide (HE), a natural diterpenoid [a bicyclo (9, 3, 1) pentadecane], is a potent nonsteroidal anti-inflammatory drug. In this report, we demonstrate that HE also inhibits the growth of a variety of human and murine tumor cell lines in vitro at concentrations ranging from 0.3 to 10 microM and was inactive as a mutagen in the Ames test. HE exhibited highly potent (0.3-10 mg/kg dose ranges) activities against B16 melanoma growth in C57BL/6 mice and P388D1 leukemia in C57BL/6 x DBA/2 F(1) mice, respectively. At a low maximal effective dose of 5 mg/kg, HE induced significant in vivo antitumor activities that were better than or comparable with most of the standard chemotherapeutic antiangiogenic agents tested: cortisone acetate, vincristine, bleomycin, Adriamycin, 5-fluorouracil, cyclophosphamide, and etoposide. All of the agents, except vincristine, had much higher maximal effective doses than HE. HE arrested the growth of human Burkitt lymphoma CA46 cells and HeLa (cervical epitheloid carcinoma) cells in the G2-M phase of the cell cycle, which was caused by interference, either direct or indirect, with actin assembly. Thus, the cell cycle arrest occurred at cytokinesis, as demonstrated by an increase in the number of binucleate cells. Moreover, HE inhibited vascular endothelial growth factor-induced cell proliferation in vitro, with an IC(50) of 28.6 microM, and it significantly inhibited basic fibroblast growth factor-induced angiogenesis on the chick chorioallantoic membrane, with an IC50 of 10 microM. Furthermore, HE inhibited endothelial cell migration on vitronectin, collagen, and fibronectin. Besides its activity as a nonsteroidal anti-inflammatory drug, HE also has promise for the chemotherapy of cancer.
Collapse
MESH Headings
- Actins/metabolism
- Angiogenesis Inhibitors/pharmacology
- Angiogenesis Inhibitors/toxicity
- Animals
- Antineoplastic Agents/pharmacology
- Antineoplastic Agents/toxicity
- Cell Adhesion/drug effects
- Cell Cycle/drug effects
- Cell Division/drug effects
- Cell Movement/drug effects
- Chick Embryo
- Diterpenes/pharmacology
- Diterpenes/toxicity
- Endothelium, Vascular/cytology
- Endothelium, Vascular/drug effects
- Growth Inhibitors/pharmacology
- HeLa Cells
- Humans
- Leukemia, Experimental/drug therapy
- Leukemia, Experimental/pathology
- Melanoma, Experimental/drug therapy
- Melanoma, Experimental/pathology
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mice, Inbred DBA
- Mutagenicity Tests
- Neovascularization, Physiologic/drug effects
- Rabbits
- Tubulin/metabolism
- Tumor Cells, Cultured
Collapse
|
45
|
Parreño V, Constantini V, Cheetham S, Blanco Viera J, Saif LJ, Fernández F, Leoni L, Schudel A. First isolation of rotavirus associated with neonatal diarrhoea in guanacos (Lama guanicoe) in the Argentinean Patagonia region. ACTA ACUST UNITED AC 2002. [PMID: 11765807 PMCID: PMC7165783 DOI: 10.1111/j.1439-0450.2001.00486.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Group A rotavirus (RV) and coronavirus (CV) are common viral pathogens associated with neonatal diarrhoea in numerous animal species. The purpose of this work was to investigate the presence of these viral agents in two farm populations of captured guanacos (Lama guanicoe) in the Argentinean Patagonia region, that developed severe diarrhoea outbreaks. Stool and serum samples were analysed for RV and bovine CV antigen and antibody by enzyme‐linked immunosorbent assay. Rotavirus was detected in faeces from two new‐born guanacos with acute diarrhoea, one in each farm. After electrophoretic analysis, each isolated strain, showed a distinctive long dsRNA electropherotype characteristic of group A rotaviruses (4:2:3:2). In addition, 95% (38 of 40) of the sampled animals were positive for RV antibodies, suggesting a high prevalence of RV infection in the populations tested. No evidence of CV circulation by antigen or antibody analysis was observed. To our knowledge, this is the first report of the detection and isolation of RV associated with neonatal diarrhoea in Lama guanicoe.
Collapse
Affiliation(s)
- V Parreño
- Instituto de Virologia, Centro de Investigaciones en Ciencias Veterinarias y Agronomicas, Instituto Nacional de Tecnología Agropecuaria, Castelar, Argentina
| | | | | | | | | | | | | | | |
Collapse
|
46
|
Parreño V, Constantini V, Cheetham S, Blanco Viera J, Saif LJ, Fernández F, Leoni L, Schudel A. First isolation of rotavirus associated with neonatal diarrhoea in guanacos (Lama guanicoe) in the Argentinean Patagonia region. J Vet Med B Infect Dis Vet Public Health 2001; 48:713-20. [PMID: 11765807 PMCID: PMC7165783 DOI: 10.1046/j.1439-0450.2001.00486.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Group A rotavirus (RV) and coronavirus (CV) are common viral pathogens associated with neonatal diarrhoea in numerous animal species. The purpose of this work was to investigate the presence of these viral agents in two farm populations of captured guanacos (Lama guanicoe) in the Argentinean Patagonia region, that developed severe diarrhoea outbreaks. Stool and serum samples were analysed for RV and bovine CV antigen and antibody enzyme-linked immunosorbent assay. Rotavirus was detected in faeces from two new-born guanacos with acute diarrhoea, one in each farm. After electrophoretic analysis, each isolated strain, showed a distinctive long dsRNA electropherotype characteristic of group A rotaviruses (4:2:3:2). In addition, 95% (38 of 40) of the sampled animals were positive for RV antibodies, suggesting a high prevalence of RV infection in the populations tested. No evidence of CV circulation by antigen or antibody analysis was observed. To our knowledge, this is the first report of the detection and isolation of RV associated with neonatal diarrhoea in Lama guanicoe.
Collapse
Affiliation(s)
- V Parreño
- Instituto de Virologia, Centro de Investigaciones en Ciencias Veterinarias y Agronomicas, Instituto Nacional de Tecnología Agropecuaria, Castelar, Argentina
| | | | | | | | | | | | | | | |
Collapse
|
47
|
Leoni L, Desai TA. Nanoporous biocapsules for the encapsulation of insulinoma cells: biotransport and biocompatibility considerations. IEEE Trans Biomed Eng 2001; 48:1335-41. [PMID: 11686632 DOI: 10.1109/10.959329] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This study investigates whether nanoporous micromachined biocapsules, with uniform membrane pore sizes of 24.5-nm, can be used to encapsulate insulin-secreting cells in vitro. This approach to cell encapsulation is based on microfabrication technology whereby immunoisolation membranes are bulk and surface micromachined to present uniform and well-controlled pore sizes as small as 10 nm, tailored surface chemistries, and precise microarchitectures. This study evaluates the behavior of insulinoma cells with micromachined membranes, the effect of matrix configurations within the biocapsule on cell behavior, as well as insulin and glucose transport through the biocapsule membranes.
Collapse
Affiliation(s)
- L Leoni
- Department of Bioengineering, University of Illinois at Chicago, 60607 USA
| | | |
Collapse
|
48
|
Abstract
The ability to create biocompatible well-controlled membranes has been an area of great interest over the last few years, particularly for biosensor applications. The present study describes the fabrication and characterization of novel nanoporous micromachined membranes that exhibit selective permeability and low biofouling. Results indicate that such membranes can be fabricated with uniform pore sizes capable of the simultaneous exclusion of albumin and diffusion of glucose. Compared to polymeric membranes of similar pore size, micromachined silicon membranes allowed more than twice the amount of glucose diffusion after 240 min and complete albumin exclusion. Moreover, membranes exhibit no morphological change or degradability in the presence of biological proteins and fluids at 37 degrees C. The results point to the potential of using such membranes for implantable biosensor applications. With monodisperse pores sizes as small as 10 nm, these membranes offer advantages in their reproducibility, stability, and ability to be integrated in silicon-based biosensing technology.
Collapse
Affiliation(s)
- T A Desai
- Department of Bioengineering, University of Illinois at Chicago, 60607, USA.
| | | | | | | | | |
Collapse
|
49
|
Corbeil J, Sheeter D, Genini D, Rought S, Leoni L, Du P, Ferguson M, Masys DR, Welsh JB, Fink JL, Sasik R, Huang D, Drenkow J, Richman DD, Gingeras T. Temporal Gene Regulation During HIV-1 Infection of Human CD4 + T Cells. Genome Res 2001. [DOI: 10.1101/gr.180201] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
CD4+ T-cell depletion is a characteristic of human immunodeficiency virus type 1 (HIV-1) infection. In this study, modulation of mRNA expression of 6800 genes was monitored simultaneously at eight time points in a CD4+ T-cell line (CEM-GFP) during HIV infection. The responses to infection included: (1) >30% decrease at 72 h after infection in overall host-cell production of monitored mRNA synthesis, with the replacement of host-cell mRNA by viral mRNA, (2) suppression of the expression of selected mitochondrial and DNA repair gene transcripts, (3) increased expression of the proapoptotic gene and its gene p53-induced product Bax, and (4) activation of caspases 2, 3, and 9. The intense HIV-1 transcription resulted in the repression of much cellular RNA expression and was associated with the induction of apoptosis of infected cells but not bystander cells. This choreographed host gene response indicated that the subversion of the cell transcriptional machinery for the purpose of HIV-1 replication is akin to genotoxic stress and represents a major factor leading to HIV-induced apoptosis.
Collapse
|
50
|
Corbeil J, Sheeter D, Genini D, Rought S, Leoni L, Du P, Ferguson M, Masys DR, Welsh JB, Fink JL, Sasik R, Huang D, Drenkow J, Richman DD, Gingeras T. Temporal gene regulation during HIV-1 infection of human CD4+ T cells. Genome Res 2001; 11:1198-204. [PMID: 11435401 PMCID: PMC311116 DOI: 10.1101/gr.gr-1802r] [Citation(s) in RCA: 87] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
CD4(+) T-cell depletion is a characteristic of human immunodeficiency virus type 1 (HIV-1) infection. In this study, modulation of mRNA expression of 6800 genes was monitored simultaneously at eight time points in a CD4(+) T-cell line (CEM-GFP) during HIV infection. The responses to infection included: (1) >30% decrease at 72 h after infection in overall host-cell production of monitored mRNA synthesis, with the replacement of host-cell mRNA by viral mRNA, (2) suppression of the expression of selected mitochondrial and DNA repair gene transcripts, (3) increased expression of the proapoptotic gene and its gene p53-induced product Bax, and (4) activation of caspases 2, 3, and 9. The intense HIV-1 transcription resulted in the repression of much cellular RNA expression and was associated with the induction of apoptosis of infected cells but not bystander cells. This choreographed host gene response indicated that the subversion of the cell transcriptional machinery for the purpose of HIV-1 replication is akin to genotoxic stress and represents a major factor leading to HIV-induced apoptosis.
Collapse
Affiliation(s)
- J Corbeil
- Department of Medicine, University of California San Diego, La Jolla, California 92023, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|