113 results on '"S Bolis"'
Search Results
2. Protective role of cardiac progenitor cell-derived-exosomes in a new human model of ageing-induced cardiac dysfunction
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E Lazzarini, AM Lodrini, S Bolis, M Arici, S Vagni, S Panella, A Rendon Angel, T Torre, G Vassalli, P Ameri, C Altomare, M Rocchetti, and L Barile
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Physiology ,Physiology (medical) ,Cardiology and Cardiovascular Medicine - Abstract
Funding Acknowledgements Type of funding sources: Foundation. Main funding source(s): Velux Stiftung Background Ageing of cardiomyocytes (CM) involves structural and functional adverse remodelling that finally could result in heart failure (HF) insurgence, which incidence rise along with age (1). Current medical therapies for HF may not always be tolerated in elder patients(2). Having shown that cardiac progenitor cells (CPCs) secrete nanoparticles named exosomes (EXO) enriched of cardioprotective factors(3,4), we are exploring EXO’s capacity to ameliorate senescence-derived modification into CMs. However, human models of in vitro cardiac aging are currently missing(5). Aim This study exploits CMs derived from human induced pluripotent stem cells (hiPSCs) as an in vitro model for cardiac senescence, that will be used as platform to characterize mechanisms involved in cardiac ageing and to test protective effect of CPC-derived EXO. Methods Patient-derived CPCs were reprogrammed into hiPSCs and subsequently expanded and differentiated into cardiomyocytes (hiPSC-CMs). Senescence-like phenotype was induced by short exposure (3 hours) to doxorubicin (DOX) at sub-lethal concentration (0.2 µM), followed by washing and medium change. Following DOX exposure, cells were exposed to EXO, derived from the purification of conditioned culture media of CPCs using an ultracentrifugation-based isolation method and quantified and sized using a NTA counter. Senescence induction was highlighted by protein and gene expression analysis and senescence-associated b-galactosidase (SA-β-gal) assay.Electrical activity of hiPSC-CMs was evaluated recording extracellular field potentials through multi-microelectrode arrays (MEA) and by single cell patch clamp. Metabolic features were analysed with western blot, real time RT-PCR and specific biochemical assays. Results DOX treatment in hiPSC-CMs induced senescence, as confirmed by activation of p21 and p16 pathways and increasing of SA-β-gal staining as compared to untreated cells (CTR). Biochemical and gene expression analysis revealed an increased ROS production and a reduction in mitochondrial potential, which drives a strong decrease in the ATP/AMP ratios. Real Time PCR analysis reveal an increased transcription of molecules related to the senescence associated secretory phenotype in DOX-CMs. Moreover, DOX-CMs showed impaired Ca++ handling, prolonged multicellular QTc and single cell APD, with increased APD variability and delayed afterdepolarizations (DADs) incidence in comparison to CTR. EXO treatment mitigated the senescent phenotype induced by DOX, as shown by a decreased ROS induction, higher mitochondrial potential which drives a restored ATP/AMP ratio. Furthermore, DOX-induced QTc prolongation was prevented by EXO treatment. Conclusion Our hiPSC-CMs based cellular model recapitulates the phenotype of aged CMs in terms of senescence markers, electrical and metabolic proprieties. CPC-derived EXOs limit age-related modifications, highlighting the cardioprotective role of small molecules released by EXO.
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- 2022
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3. Optilearning for job shop problems.
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Bruno Apolloni, S. Bolis, and Anna Maria Zanaboni
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- 1998
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4. Skipping protocols integrating voice and data on a token bus LAN.
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S. Bolis and E. G. Economou
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- 1996
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5. SBP-Net: an integrated voice/data token ring LAN.
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S. Bolis, E. G. Economou, Dennis Mouzakis, and George Philokyprou
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- 1993
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6. Voice and data integration on a unidirectional bus LAN.
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E. G. Economou, S. Bolis, and George Philokyprou
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- 1992
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7. The Utility of Intravenous Immunoglobulin (IVIG) in the Treatment of Anti-Melanoma Differentiation Associated Protein 5 (anti-MDA5) Dermatomyositis (DM)
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S. Bolis, K. Godil, and J.O. Langstengel
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biology ,business.industry ,Melanoma ,Immunology ,medicine ,biology.protein ,MDA5 ,Dermatomyositis ,Antibody ,medicine.disease ,business - Published
- 2020
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8. FBC-Net: a reverse round robin LAN for voice and data traffic.
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E. G. Economou, S. Bolis, and George Philokyprou
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- 1991
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9. Evaluating near-surface ozone levels simulated from MACC global and regional modelling systems in Eastern Mediterranean under the influence of Etesian winds
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D. Melas, E. Solomou, Anastasia Poupkou, S. Bolis, Prodromos Zanis, and Mihalis Lazaridis
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Mediterranean climate ,Atmospheric Science ,Ozone ,010504 meteorology & atmospheric sciences ,Integrated Forecast System ,010501 environmental sciences ,Atmospheric sciences ,01 natural sciences ,Atmospheric composition ,chemistry.chemical_compound ,Eastern mediterranean ,Surface ozone ,chemistry ,Climatology ,Environmental science ,Air quality index ,0105 earth and related environmental sciences - Abstract
The aim of this study is to examine the ability of two modelling systems, a global and a regional, to reproduce the influence of Etesian winds on the ozone zonal distribution over Eastern Mediterranean. Specifically, the results of the global MACC (Monitoring Atmospheric Composition and Climate) reanalysis model (Integrated Forecast System - MOZART (IFS-MOZART)) and an ensemble of MACC regional air quality models (ENS) are compared versus observed data from three background monitoring stations in Central and Eastern Mediterranean (i.e. Gharb (ARB) - Malta, Finokalia (FIN) (Crete) - Greece and Agia Marina (CAO) - Cyprus). Two distinct group of days characterized by different wind flows are used for the evaluation assessment for a 5-month period (May to September) for two years (2011 − 2012). During the selected period, the Etesians are the predominant winds that blow from northern directions over the Aegean Sea, affecting ozone levels. The observed mean ozone concentrations at Eastern Mediterranean stations are about 5 ppbv higher during Etesian days than during non-selected days whereas at the Central Mediterranean station (ARB), the difference between the two groups of days is small. Furthermore, the Eastern Mediterranean stations present generally higher observed ozone levels than the Central Mediterranean station with these differences intensifying during Etesian days. The evaluation results suggest that although the two modelling systems underestimate surface ozone concentrations systematically, they can capture to a certain extend the effect of the Etesian winds on the ozone zonal distribution. Specifically, FIN station which is directly under the influence of the Etesian winds presents higher simulated ozone values compared to the other two stations in agreement with the observations. For both modelling systems, the statistical evaluation metrics are better for the Central Mediterranean station, but there is a considerable improvement for the regional modelling system indicating that the ENS reproduces better the observed ozone values and zonal distribution in comparison to the IFS-MOZART.
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- 2018
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10. Evaluation of Ozone Levels from MACC Global and Regional Modelling Systems Over Eastern Mediterranean—The Influence of Etesian Winds
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S. Bolis, Prodromos Zanis, Ermioni Solomou, Anastasia Poupkou, D. Melas, and Mihalis Lazaridis
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Atmospheric composition ,chemistry.chemical_compound ,Eastern mediterranean ,Geography ,Ozone ,Surface ozone ,chemistry ,Ozone concentration ,Baseline (sea) ,Climatology ,Global model ,Air quality index ,Remote sensing - Abstract
This work focuses on the evaluation of the simulated ozone levels from the global MACC (Monitoring Atmospheric Composition and Climate) reanalysis and an ensemble of MACC regional air quality models with ozone measurements from three baseline stations in Central and Eastern Mediterranean Sea, located in Malta, Greece (island of Crete) and Cyprus. Τhis region and especially the Aegean Sea are under the influence of the Etesian winds that start blowing in late spring and stop in early autumn. The evaluation is performed by calculating statistical metrics for a period of two years (2011–2012) for both models separately for the selected Etesian days and the non-selected days. Moreover, in order to examine whether the stratosphere-troposphere ozone transport contributes to ozone concentrations, four different pressure levels (1013, 850, 700 and 500 hPa) from the global model are also assessed. The analysis reveals that both global reanalysis and the ensemble of regional models underestimate the near surface ozone levels. In general, the underestimation is lower at Malta and Cyprus stations during non-selected days. The ensemble of the regional models presents a better performance compared to the global reanalysis approach.
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- 2016
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11. Moderated Poster session - Genetic, Epigenetic & Integrative480Inhibiting mitochondrial fission with Mdivi-1 directs cardiac differentiation of human induced pluripotent stem cells via protein kinase CK2481A novel role of tristetraprolin in preventing mitochondrial dysfunction in the heart against iron deficiency by optimizing expression of Rieske iron-sulfur protein482Different therapeutic approaches to downregulate the activation of the hepatic interleukin-6/stat3/complement pathway in two models of autoimmune myocarditis483In vitro and in vivo genome engineering of Dilated Cardiomyopathy caused by phospholamban R14 deletion.484Contractile dysfunction of induced pluripotent stem cell-derived cardiomyocytes from a duchenne muscular dystrophy patient485Cigarette smoking increases expression of the G protein-coupled receptor 15 mRNA by change in CpG methylation486Cardiogenic potential of iPSC from cardiac progenitor cells
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E Pianezzi, T Haase, JM Pioner, F Stillitano, F Marino, T Sato, S Lim, P Sivakumaran, D Hernandez, RCB Wong, C Taylor, G Dusting, A Pebay, M Bayeva, HC Chang, JS Shapiro, S Yar, H Ardehali, A Camporeale, L Avalle, S Heymans, B Roman, V Kotelianski, V Poli, I Karakikes, M Nonnenmacher, D Ceholski, L Zhang, JS Hulot, CL Cai, EG Kranias, RJ Hajjar, AW Racca, JM Klaiman, X Guan, L Pabon, V Muskheli, J Macadangdang, DH Kim, DL Mack, MK Childers, C Tesi, C Poggesi, CE Murry, M Regnier, J Krause, C Mueller, J Stenzig, C Roethemeier, PS Wild, S Blankenberg, T Zeller, C Altomare, E Cervio, S Bolis, T Moccetti, GG Camici, L Barile, and GG Vassalli
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Physiology ,Physiology (medical) ,Cardiology and Cardiovascular Medicine - Published
- 2016
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12. Liquid crystals as a matrix to induce an oriented polyfluorene beta-phase
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S Bolis, J Beeckman, P Kockaert, and T Virgili
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- 2014
13. Oxidation of articular cartilage glyceraldehyde-3-phosphate dehydrogenase (G3PDH) occurs in vivo during carrageenin-induced arthritis
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Dennis A. Lowther, Mark S. Baker, and S. Bolis
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Cartilage, Articular ,Immunology ,Arthritis ,Iodoacetates ,Oxidative phosphorylation ,Deoxyglucose ,Carrageenan ,Toxicology ,Oxidative Phosphorylation ,Adenosine Triphosphate ,In vivo ,medicine ,Animals ,Synovial fluid ,Pharmacology (medical) ,Glycolysis ,Glyceraldehyde 3-phosphate dehydrogenase ,Pharmacology ,biology ,Cartilage ,Glyceraldehyde-3-Phosphate Dehydrogenases ,medicine.disease ,Molecular biology ,Iodoacetic Acid ,medicine.anatomical_structure ,Proteoglycan ,Biochemistry ,biology.protein ,Female ,Proteoglycans ,Rabbits ,2,4-Dinitrophenol ,Oxidation-Reduction ,Dinitrophenols - Abstract
Articular cartilage proteoglycan biosynthesis was substantially inhibited by the competitive glycolytic inhibitor 2-deoxyglucose (approximately 65% at 100 mM), but to a much lesser degree (approximately 10%) by the oxidative phosphorylation uncoupler, 2,4-dinitrophenol. These results confirm that articular cartilage proteoglycan synthesis mostly utilises ATP which is generated by glycolysis. In addition, we have utilised the loss of the relatively specific labelling of glyceraldehyde-3-phosphate dehydrogenase (G3PDH) by [3H]-iodoacetic acid to show that rabbit articular G3PDH is oxidised in vivo during the animal model of acute arthritis, carrageenin-induced arthritis, in the same way as we have previously shown that cartilage G3PDH is oxidised after in vitro exposure to sublethal doses of H2O2. The oxidation of rabbit G3PDH in vivo (18 hr post-injection) corresponds with the maximal influx of PMNL cells into the arthritic synovial fluid and with substantial inhibition of proteoglycan core protein synthesis. We propose that H2O2 released from "activated" PMNLs and macrophages is responsible for the "down-regulation" of biosynthetic processes found in cartilage during acute inflammation.
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- 1991
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14. A phase II study of neuroimmunotherapy with subcutaneous low-dose IL-2 plus the pineal hormone melatonin in untreatable advanced hematologic malignancies
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P, Lissoni, S, Bolis, F, Brivio, and L, Fumagalli
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Adult ,Male ,Adolescent ,Antineoplastic Agents, Hormonal ,Neuroimmunomodulation ,Tumor Necrosis Factor-alpha ,Injections, Subcutaneous ,Middle Aged ,Combined Modality Therapy ,Survival Analysis ,Disease-Free Survival ,Drug Administration Schedule ,Neoplasm Proteins ,Treatment Outcome ,Hematologic Neoplasms ,Disease Progression ,Humans ,Immunologic Factors ,Interleukin-2 ,Female ,Aged ,Melatonin - Abstract
Interleukin-2 (IL-2) has proven to be able to generate an effective anticancer immunity against both solid and hematologic malignancies. Moreover, recent advances in the knowledge of psychoneuroimmunology have demonstrated that anticancer immunity is under neuroendocrine control and that the pineal hormone melatonin (MLT) may stimulate the IL-2-dependent anticancer reaction. Finally, preliminary clinical studies have already shown that the concommitant administration of MLT may amplify the efficacy of IL-2 in the treatment of advanced solid neoplasms, whereas there are no data about MLT influence on IL-2 activity in hematologic malignancies. The aim of the present study was to evaluate the efficacy and tolerability of a neuroimmunotherapeutic combination of low-dose IL-2 plus MLT in advanced hematologic malignancies which did not respond to previous standard therapies. The study included 12 evaluable patients. Tumor histotypes were as follows: non-Hodgkin's lymphoma (NHL) 6; Hodgkin's disease (HD), 2; multiple myeloma, 2; acute myelogenous leukemia (ALM), 1 and chronic myelomonocytic leukemia (CMML), 1. IL-2 was injected subcutaneously at a dose of 3 million IU/day for 6 days per week for 4 weeks, corresponding to one cycle. MLT was given orally at 20 mg/day in the evening, without interruption. In non-progressing patients, a second IL-2 cycle was planned after a 3 week-rest period. A partial response was achieved in one patient with multiple myeloma. Stable disease occurred in 7 other patients (NHL, 3; HD, 1; AML, 1; CLLM, 1; multiple myeloma, 1), whereas the other 4 patients progressed. Therefore, lack of progression was obtained in 8 out of 12 (67%) patients, with a median duration of 21+ months (14-30+ months). The treatment was well tolerated in all patients. These preliminary results would suggest that the concomitant administration of low-dose IL-2 plus the pineal hormone MLT may prolong the survival time in untreatable advanced hematologic malignancies, with results comparable to those previously reported using a more toxic immunotherapy, consisting of high-dose IL-2 alone.
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- 2000
15. The ocular surface, the tear film, and the wettability of contact lenses
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C A, Morris, B A, Holden, E, Papas, H J, Griesser, S, Bolis, P, Anderton, and F, Carney
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Contact Lenses ,Surface Properties ,Epithelium, Corneal ,Mucins ,Lipids ,Epithelium ,Tears ,Wettability ,Animals ,Humans ,Methacrylates ,Polymethyl Methacrylate ,Cattle ,Contact Lens Solutions ,Conjunctiva - Published
- 1998
16. Effect of exogenous hyaluronan and hyaluronan oligosaccharides on hyaluronan and aggrecan synthesis and catabolism in adult articular cartilage explants
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H. C. Robinson, Christopher J. Handley, Glendon J. Parker, S. Bolis, B. N. Preston, and Chee Keng Ng
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Adult ,Cartilage, Articular ,Free Radicals ,Biophysics ,Oligosaccharides ,In Vitro Techniques ,Biochemistry ,Glycosaminoglycan ,Hyaluronidase ,medicine ,Animals ,Humans ,Lectins, C-Type ,Aggrecans ,Hyaluronic Acid ,Molecular Biology ,Aggrecan ,Cells, Cultured ,Extracellular Matrix Proteins ,integumentary system ,biology ,Molecular mass ,Dose-Response Relationship, Drug ,Catabolism ,Chemistry ,Cartilage ,Streptomyces ,Culture Media ,carbohydrates (lipids) ,Molecular Weight ,medicine.anatomical_structure ,Proteoglycan ,biology.protein ,Cattle ,Proteoglycans ,medicine.drug ,Explant culture - Abstract
The addition of hyaluronan to the culture medium of explant cultures of articular cartilage was shown to suppress the synthesis of hyaluronan and aggrecan, the major proteoglycan present in cartilage, and resulted in a greater proportion of the newly synthesized aggrecan and hyaluronan appearing in the culture medium. This effect of exogenous hyaluronan on aggrecan and hyaluronan synthesis was concentration-dependent and reversible on removal of the glycosaminoglycan from the culture medium. The addition of tetra- and hexasaccharides derived from Streptomyces sp. hyaluronidase digestion of hyaluronan to explant cultures of articular cartilage did not change the rate of synthesis of aggrecan or hyaluronan or their ultimate distribution between tissue and medium. However, the addition of tetra- and hexasaccharides of hyaluronan resulted in a decrease in the rate of loss of hyaluronan from the tissue but not that of aggrecan, which remained the same as in control cultures. This suppression of the rate of loss of hyaluronan was eliminated on removal of the hyaluronan oligosaccharides from the culture medium. Analysis of the hydrodynamic size of the newly synthesized hyaluronan indicated that the presence of hyaluronan tetra- and hexasaccharides brought about an accumulation of hyaluronan of intermediate molecular mass. Since no radiolabeled hyaluronan was detected in the culture medium, it was concluded that the tetra- and hexasaccharides inhibited the internalization and intracellular catabolism of hyaluronan by the cartilage explant cultures. Regardless of whether hyaluronan or tetra- and hexasaccharides of hyaluronan were added to the culture medium, newly synthesized hyaluronan underwent depolymerization at a rate consistent with a mechanism involving oxygen-derived radicals.
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- 1995
17. [Multiple myeloma. Role of prognostic factors and staging in a therapeutic program]
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S, Bolis, E R, Bregani, F, Rossini, I, Casaroli, E, Lanzi, P, Maffè, L, Baldicchi, L, Borin, S, Mingozzi, and P, Tripputi
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Humans ,Multiple Myeloma ,Prognosis ,Forecasting ,Neoplasm Staging - Abstract
Patients affected with multiple myeloma constitute an heterogeneous population with very different clinical patterns, varying from asymptomatic to very compromised patients with severe and uncontrolled disease. Most common clinical and biological staging systems have been in use for many years. Recently new prognostic factors have been identified; among them, serum levels of beta-2 microglobulin, C-reactive protein and interleukin-6 employed with already known parameters have been useful in the new staging system, permitting a more focalized therapy. As today is not yet possible to define the best treatment schedule, as the most common treatments are incapable to eradicate myeloma neoplastic clone even in responsive patients. Nevertheless extensive use of biologic response modifiers in the last years, as alpha interferon, have added new powerful and hopeful therapeutic tools even if the results need to be confirmed in future trials. It is important to remind the primary role of bone marrow transplantation associated with high dose polychemotherapy even if just a minority of patients is eligible for this therapeutic chance.
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- 1994
18. Atrial flutter followed by sick sinus syndrome as presenting symptoms of B-cell malignant non-Hodgkin lymphoma involving the heart
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S, Bolis, E R, Bregani, F, Rossini, R, Schiavina, and E M, Pogliani
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Heart Neoplasms ,Male ,Sick Sinus Syndrome ,Lymphoma, B-Cell ,Atrial Flutter ,Humans ,Middle Aged - Abstract
A case of non-Hodgkin lymphoma involving the heart is described; the patient suffered for atrial flutter, followed by sick sinus syndrome for one year before diagnosis was made. Although it is not possible to demonstrate primary cardiac onset, the clinical history is highly suggestive. Most recent cases described occurred in immunodeficient patients. Interestingly our patient showed no evidence of immunodeficiency. Our patient received conventional chemotherapy followed by radiotherapy, obtaining complete remission without complications, and remains in this condition after a 3-year follow-up. The patient's good condition may be responsible for this successful outcome.
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- 1993
19. High dose intravenous immunoglobulin (IVIgG) in Evans' syndrome
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S, Bolis, A, Marozzi, F, Rossini, I, Casaroli, E M, Pogliani, and G, Corneo
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Male ,Adolescent ,Humans ,Immunoglobulins, Intravenous ,Anemia, Hemolytic, Autoimmune ,Combined Modality Therapy ,Methylprednisolone - Published
- 1991
20. A case of acute lymphoblastic leukemia in an anti-HIV positive patient
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E M, Pogliani, F, Rossini, P, Pioltelli, E, Lanzi, I, Casaroli, S, Bolis, and G, Corneo
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Male ,Immunocompromised Host ,Humans ,HIV Infections ,Disease Susceptibility ,Burkitt Lymphoma - Published
- 1991
21. Surgery and chemotherapy in the treatment of gastric non-Hodgkin's lymphoma
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F, Rossini, E M, Pogliani, P, Pioltelli, E, Lanzi, I, Casaroli, S, Bolis, and G, Corneo
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Adult ,Aged, 80 and over ,Male ,Lymphoma, Non-Hodgkin ,Antineoplastic Agents ,Middle Aged ,Combined Modality Therapy ,Gastrectomy ,Stomach Neoplasms ,Antineoplastic Combined Chemotherapy Protocols ,Humans ,Female ,Aged ,Retrospective Studies - Abstract
We have retrospectively examined 35 cases of non-Hodgkin's lymphoma (NHL) with gastric involvement at the onset. All patients have completed induction therapy at the time of this report. Histologic specimens have been classified according to the Working Formulation. Patients have undergone surgery and/or chemotherapy. Twenty out of 22 patients with stage I or II disease had surgery. Seventeen out of 20 gastrectomized patients achieved complete remission (11 with stage I and 6 with stage II): Fifteen of these are in their first complete remission with median follow-up of 24 months (range 8-68). Three patients with stage IV had surgery, two of which achieved CR. These data confirm that combined therapy is useful in gastric NHL presenting with stage I and II; no conclusions can be drawn regarding disseminated disease.
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- 1990
22. Scheduling delay protocols integrating voice and data on a bus LAN
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S. Bolis, P.G. Philokyprou, and E.G. Economou
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Voice activity detection ,Voice traffic ,Exploit ,Network packet ,business.industry ,Computer science ,ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS ,Real-time computing ,General Engineering ,Local area network ,Scheduling (computing) ,Transmission time ,business ,Data transmission ,Computer network - Abstract
Two new protocols integrating voice and data on a multiaccess broadcast bus LAN with reverse round robin service are presented. The protocols are based on a collision free scheduling delay access mechanism. According to this mechanism, each station computes its transmission time relying on the activity of the bus. In the first protocol, we use this mechanism for both voice and data traffic. In the second protocol, the data traffic is based on the above mechanism, while, for the voice traffic, we additionally exploit the periodicity of voice. Separation of the two traffic types is achieved by the requirement for sharing the channel alternately in voice and data rounds. The transmission of data packets and voice call packets for setting up calls is assigned to the data round while the transmission of voice packets is assigned to the voice round. The proposed protocols were studied via simulation tools. They satisfy the delay constraint of voice traffic and, at the same time, guarantee a sufficient bandwidth for data traffic. Results obtained under various traffic conditions are given.
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- 1992
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23. G-net: implicit token-passing bus LAN
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E.G. Economou and S. Bolis
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Bus network ,Token passing ,Computer science ,business.industry ,Local area network ,Address bus ,Topology (electrical circuits) ,Local bus ,Electrical and Electronic Engineering ,business ,IEBus ,Control bus ,Computer network - Abstract
An implicit token-passing bus local area network (LAN) that provides a reverse round robin service to the stations is presented. The network, named G-Net, consists of a unidirectional bus folded to create a topology similar to the letter G. The G-Net provides bounded delay, a feature that makes it suitable for voice traffic. The performance of the G-Net, is evaluated via simulation.
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- 1991
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24. Degenerate Critical Points
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Theodore S. Bolis
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General Mathematics ,010102 general mathematics ,Degenerate energy levels ,0101 mathematics ,01 natural sciences ,Mathematical physics ,Mathematics - Published
- 1980
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25. [Non-Hodgkin's lymphomas: staging and therapy]
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F, Rossini, P, Pioltelli, E, Lanzi, I, Casaroli, S, Bolis, E M, Pogliani, and G, Corneo
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Adult ,Aged, 80 and over ,Male ,Adolescent ,Lymphoma, Non-Hodgkin ,Antineoplastic Combined Chemotherapy Protocols ,Humans ,Female ,Middle Aged ,Combined Modality Therapy ,Aged ,Neoplasm Staging - Abstract
Some problems of non-Hodgkin's lymphomas are examined, with special consideration for those related to treatment. Some questions of staging are also considered, together with some particular presentations, such as bulky diseases, central nervous system localizations, lymphoblastic lymphoma. The unique features of this disease in immunocompromised patients and problems related to the growing numbers of older patients eligible for curative treatment are discussed.
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- 1989
26. Bayesian Reliability Theory for Repairable Equipment
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Theodore S. Bolis
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Reliability theory ,symbols.namesake ,Bayes' theorem ,Laplace transform ,Bayesian probability ,symbols ,State (functional analysis) ,Function (mathematics) ,Poisson distribution ,Reliability (statistics) ,Mathematics ,Reliability engineering - Abstract
This report introduces an assumption called instantaneous resurrection which holds that a repaired equipment is returned to the state of an equipment of similar age which has not yet failed, rather than to the state of a new equipment. Under this assumption, the number of failures of an equipment in time t is a Poisson process with leading function - log R(t), where R(t) is the reliability function of the equipment. This fact can be used in the estimation of parameters of various prior distributions via the appropriate Poisson mixtures. The case of the two-way truncated Gamma prior and its limiting forms is discussed in the report.
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- 1980
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27. E3019
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Chen-Te Yen and T. S. Bolis
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General Mathematics - Published
- 1987
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28. E2815
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Leon Gerber, Brian R. Hunt, and Theodore S. Bolis
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General Mathematics - Published
- 1981
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29. E2706
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David L. Lovelady, Theodore S. Bolis, O. P. Lossers, A. Meir, and Ellen Hertz
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General Mathematics - Published
- 1979
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30. E2751
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Paul Monsky, Theodore S. Bolis, and R. K. Oliver
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General Mathematics - Published
- 1981
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31. E2547
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T. S. Bolis and L. Kuipers
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General Mathematics - Published
- 1976
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32. E2721
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Allen Emerson, M. L. J. Hautus, and T. S. Bolis
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General Mathematics - Published
- 1979
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33. E2629
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David P. Robbins and Theodore S. Bolis
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General Mathematics - Published
- 1978
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34. Elementary Problems: E2546-E2551
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Hugh L. Montgomery, David Singmaster, I. J. Schoenberg, Murray S. Klamkin, Richard P. Stanley, and T. S. Bolis
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General Mathematics ,Mathematics - Published
- 1975
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35. E2399
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D. E. Daykin, D. M. Bloom, and T. S. Bolis
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General Mathematics - Published
- 1974
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36. Every finitely generated Fischer group is finite
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Theodore S. Bolis
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Algebra ,Combinatorics ,Conjugacy class ,Group (mathematics) ,Applied Mathematics ,General Mathematics ,Commutator subgroup ,Abelian group ,Moufang loop ,Fischer group ,Commutative property ,Quasigroup ,Mathematics - Abstract
By a simple combinatorial argument, and using a result of Bruck, the Burnside problem is settled affirmatively for the class of Fischer 3-groups. 0. Introduction. In a recent book on cubic forms by Yu. I. Manin [1] the Burnside problem for the class of Fischer 3-groups was posed (cf. p. 39 of [1]). In this note we give a simple combinatorial argument leading to an affirmative settlement of this problem. A result of H. R. Bruck [2] that every finitely generated commutative Moufang loop of period 3 is finite, is essential to our proof. We also need some theorems connecting symmetric quasigroups, Moufang loops and Fischer groups. 1. Definitions. A Fischer group is a pair (G, E) such that (i) G is a group, (ii) E is a generating subset of G, and (iii) x2=l, ixy)3=l and xyx e E for all x, y e E. It is easy to see that £ is a complete conjugacy class of G and that the commutator subgroup G' is generated by the elements of the form xy, ix, y e E). If we define the following operation on E (1) x ° y = xyx then (7, o) becomes a distributive symmetric quasigroup, i.e. we have x ° y=y ° x, x°(x°y)=y, x o (y ° z)=(x ° y) o (x ° z) (x, y, z e E). Moreover if we fix u e E and define x * y = u o (x ° y), x,y e E, we make (E, *) a commutative Moufang loop, i.e. all the axioms for an abelian group hold except associativity, which is replaced by weak associativity (x * y) * (x * z) = x2 * (y * z) (x, y, z e E,x2 = x* x). 2. Some auxiliary results. We mention here some results needed in the proof of our main theorem. Received by the editors April 23, 1973. AMS (MOS) subject classifications (1970). Primary 20F10; Secondary 20N05.
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- 1974
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37. miR-24-3p secreted as extracellular vesicle cargo by cardiomyocytes inhibits fibrosis in human cardiac microtissues.
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Senesi G, Lodrini AM, Mohammed S, Mosole S, Hjortnaes J, Veltrop RJA, Kubat B, Ceresa D, Bolis S, Raimondi A, Torre T, Malatesta P, Goumans MJ, Paneni F, Camici GG, Barile L, Balbi C, and Vassalli G
- Abstract
Background and Aims: Cardiac fibrosis in response to injury leads to myocardial stiffness and heart failure. At the cellular level, fibrosis is triggered by the conversion of cardiac fibroblasts (CF) into extracellular matrix-producing myofibroblasts. miR-24-3p regulates this process in animal models. Here, we investigated whether miR-24-3p plays similar roles in human models., Methods and Results: Gain- and loss-of-function experiments were performed using human induced pluripotent stem cell-derived cardiomyocytes (hCM) and primary hCF under normoxic or ischaemia-simulating conditions. hCM-derived extracellular vesicles (EVs) were added to hCF. Similar experiments were performed using three-dimensional human cardiac microtissues and ex vivo-cultured human cardiac slices.hCF transfection with miR-24-3p mimic prevented TGFβ1-mediated induction of FURIN, CCND1 and SMAD4-miR-24-3p target genes participating in TGFβ1-dependent fibrinogenesis -, regulating hCF-to-myofibroblast conversion. hCM secreted miR-24-3p as EV cargo. hCM-derived EVs modulated hCF activation. Ischaemia-simulating conditions induced miR-24-3p depletion in hCM-EVs and microtissues. Similarly, hypoxia downregulated miR-24-3p in cardiac slices. Analyses of clinical samples revealed decreased miR-24-3p levels in circulating EVs in acute myocardial infarction (AMI) patients, compared with healthy subjects. Post-mortem RNAScope analysis showed miR-24-3p downregulation in myocardium from AMI patients, compared with patients who died from noncardiac diseases. Berberin, a plant-derived agent with miR-24-3p-stimulatory activity, increased miR-24-3p contents in hCM-EVs, downregulated FURIN, CCND1 and SMAD4, and inhibited fibrosis in cardiac microtissues., Conclusions: These findings suggest that hCM may control hCF activation through miR-24-3p secreted as EV cargo. Ischaemia impairs this mechanism, favouring fibrosis., (© The Author(s) 2024. Published by Oxford University Press on behalf of the European Society of Cardiology.)
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- 2024
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38. Comparison of assays measuring extracellular vesicle tissue factor in plasma samples: communication from the ISTH SSC Subcommittee on Vascular Biology.
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Bonifay A, Mackman N, Hisada Y, Sachetto ATA, Hau C, Gray E, Hogwood J, Aharon A, Badimon L, Barile L, Baudar J, Beckmann L, Benedikter B, Bolis S, Bouriche T, Brambilla M, Burrello J, Camera M, Campello E, Ettelaie C, Faille D, Featherby S, Franco C, Guldenpfennig M, Hansen JB, Judicone C, Kim Y, Kristensen SR, Laakmann K, Langer F, Latysheva N, Lucien F, de Menezes EM, Mullier F, Norris P, Nybo J, Orbe J, Osterud B, Paramo JA, Radu CM, Roncal C, Samadi N, Snir O, Suades R, Wahlund C, Chareyre C, Abdili E, Martinod K, Thaler J, Dignat-George F, Nieuwland R, and Lacroix R
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- Humans, Blood Coagulation, COVID-19 blood, COVID-19 diagnosis, COVID-19 immunology, Predictive Value of Tests, Reproducibility of Results, Extracellular Vesicles metabolism, Thromboplastin metabolism
- Abstract
Background: Scientific and clinical interest in extracellular vesicles (EVs) is growing. EVs that expose tissue factor (TF) bind factor VII/VIIa and can trigger coagulation. Highly procoagulant TF-exposing EVs are detectable in the circulation in various diseases, such as sepsis, COVID-19, or cancer. Many in-house and commercially available assays have been developed to measure EV-TF activity and antigen, but only a few studies have compared some of these assays., Objectives: The International Society on Thrombosis and Haemostasis Scientific and Standardization Committee Subcommittee on Vascular Biology initiated a multicenter study to compare the sensitivity, specificity, and reproducibility of these assays., Methods: Platelet-depleted plasma samples were prepared from blood of healthy donors. The plasma samples were spiked either with EVs from human milk or EVs from TF-positive and TF-negative cell lines. Plasma was also prepared from whole human blood with or without lipopolysaccharide stimulation. Twenty-one laboratories measured EV-TF activity and antigen in the prepared samples using their own assays representing 18 functional and 9 antigenic assays., Results: There was a large variability in the absolute values for the different EV-TF activity and antigen assays. Activity assays had higher specificity and sensitivity compared with antigen assays. In addition, there was a large intra-assay and interassay variability. Functional assays that used a blocking anti-TF antibody or immunocapture were the most specific and sensitive. Activity assays that used immunocapture had a lower coefficient of variation compared with assays that isolated EVs by high-speed centrifugation., Conclusion: Based on this multicenter study, we recommend measuring EV-TF using a functional assay in the presence of an anti-TF antibody., Competing Interests: Declaration of competing interests F.D.-G. and R.L. filed a patent on microvesicle fibrinolytic activity licensed to Stago and obtained a common grant within the framework of the excellence program innovative tests to customize antiplatelet therapy in chronic kidney disease with acute coronary syndrome. The remaining authors declare no competing financial interests., (Copyright © 2024. Published by Elsevier Inc.)
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- 2024
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39. Extracellular vesicles from II trimester human amniotic fluid as paracrine conveyors counteracting oxidative stress.
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Senesi G, Guerricchio L, Ghelardoni M, Bertola N, Rebellato S, Grinovero N, Bartolucci M, Costa A, Raimondi A, Grange C, Bolis S, Massa V, Paladini D, Coviello D, Pandolfi A, Bussolati B, Petretto A, Fazio G, Ravera S, Barile L, Balbi C, and Bollini S
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- Humans, Pregnancy, Female, Mice, Animals, Cell Line, Extracellular Vesicles metabolism, Oxidative Stress, Amniotic Fluid metabolism, Amniotic Fluid cytology, Paracrine Communication, Pregnancy Trimester, Second metabolism
- Abstract
Background: We previously demonstrated that the human amniotic fluid (hAF) from II trimester of gestation is a feasible source of stromal progenitors (human amniotic fluid stem cells, hAFSC), with significant paracrine potential for regenerative medicine. Extracellular vesicles (EVs) separated and concentrated from hAFSC secretome can deliver pro-survival, proliferative, anti-fibrotic and cardioprotective effects in preclinical models of skeletal and cardiac muscle injury. While hAFSC-EVs isolation can be significantly influenced by in vitro cell culture, here we profiled EVs directly concentrated from hAF as an alternative option and investigated their paracrine potential against oxidative stress., Methods: II trimester hAF samples were obtained as leftover material from prenatal diagnostic amniocentesis following written informed consent. EVs were separated by size exclusion chromatography and concentrated by ultracentrifugation. hAF-EVs were assessed by nanoparticle tracking analysis, transmission electron microscopy, Western Blot, and flow cytometry; their metabolic activity was evaluated by oximetric and luminometric analyses and their cargo profiled by proteomics and RNA sequencing. hAF-EV paracrine potential was tested in preclinical in vitro models of oxidative stress and dysfunction on murine C2C12 cells and on 3D human cardiac microtissue., Results: Our protocol resulted in a yield of 6.31 ± 0.98 × 10
9 EVs particles per hAF milliliter showing round cup-shaped morphology and 209.63 ± 6.10 nm average size, with relevant expression of CD81, CD63 and CD9 tetraspanin markers. hAF-EVs were enriched in CD133/1, CD326, CD24, CD29, and SSEA4 and able to produce ATP by oxygen consumption. While oxidative stress significantly reduced C2C12 survival, hAF-EV priming resulted in significant rescue of cell viability, with notable recovery of ATP synthesis and concomitant reduction of cell damage and lipid peroxidation activity. 3D human cardiac microtissues treated with hAF-EVs and experiencing H2 O2 stress and TGFβ stimulation showed improved survival with a remarkable decrease in the onset of fibrosis., Conclusions: Our results suggest that leftover samples of II trimester human amniotic fluid can represent a feasible source of EVs to counteract oxidative damage on target cells, thus offering a novel candidate therapeutic option to counteract skeletal and cardiac muscle injury., Competing Interests: Declaration of competing interest The authors have nothing to disclose nor competing interests to declare., (Copyright © 2024 The Authors. Published by Elsevier B.V. All rights reserved.)- Published
- 2024
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40. Transcriptomic signature of stress-induced premature senescence in cardiomyocytes.
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Rendon-Angel A, Lazzarini E, Cascione L, Burrello J, Goshovska Y, Biemmi V, Panella S, Bolis S, Colucci M, Altomare C, Rinaldi A, Torre T, Alimonti A, and Barile L
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- Animals, Gene Expression Profiling, Cells, Cultured, Humans, Stress, Physiological genetics, Gene Expression Regulation, Myocytes, Cardiac metabolism, Myocytes, Cardiac pathology, Transcriptome, Cellular Senescence genetics
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- 2024
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41. Impact of Isolation Methods on Extracellular Vesicle Functionality In Vitro and In Vivo.
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Balbi C, Parisse P, Vondracek H, Lazzarini E, Bolis S, Fertig TE, Gherghiceanu M, Barile L, and Vassalli G
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- Humans, Focal Adhesion Protein-Tyrosine Kinases, Chromatography, Gel, Carcinoma, Choroid Plexus Neoplasms, Extracellular Vesicles
- Abstract
This study compares the impact of two isolation methods, ultracentrifugation (UC) and size exclusion chromatography (SEC), on small extracellular vesicles (sEVs) from primary human cardiac mesenchymal-derived progenitor cells (CPCs). sEV_UC and sEV_SEC exhibit similar size, marker expression, and miRNA cargo, but sEV_UC contains notably higher total protein levels. In vitro assays show that sEV_UC, despite an equal particle count, induces more robust ERK phosphorylation, cytoprotection, and proliferation in iPS-derived cardiomyocytes (iPS-CMs) compared to sEV_SEC. sEV_UC also contains elevated periostin (POSTN) protein levels, resulting in enhanced focal adhesion kinase (FAK) phosphorylation in iPS-CMs. Importantly, this effect persists with treatment with soluble free-sEV protein fraction from SEC (Prote_SEC), indicating that free proteins like POSTN in sEV_UC enhance FAK phosphorylation. In vivo, sEV contamination with soluble proteins doesn't affect cardiac targeting or FAK phosphorylation, underscoring the intrinsic tissue targeting properties of sEV. These findings emphasize the need for standardized sEV isolation methods, as the choice of method can impact experimental outcomes, particularly in vitro., (© 2023 Wiley-VCH GmbH.)
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- 2024
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42. Radioimmunotherapy versus autologous hematopoietic stem cell transplantation in relapsed/refractory follicular lymphoma: a Fondazione Italiana Linfomi multicenter, randomized, phase III trial.
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Ladetto M, Tavarozzi R, Zanni M, Evangelista A, Ferrero S, Tucci A, Botto B, Bolis S, Volpetti S, Zilioli VR, Puccini B, Arcari A, Pavone V, Gaidano G, Corradini P, Tani M, Cavallo F, Milone G, Ghiggi C, Pinto A, Pastore D, Ferreri AJM, Latte G, Patti C, Re F, Benedetti F, Luminari S, Pennese E, Bossi E, Boccomini C, Anastasia A, Bottelli C, Ciccone G, and Vitolo U
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- Humans, Male, Middle Aged, Adolescent, Young Adult, Adult, Aged, Female, Radioimmunotherapy, Rituximab, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Disease-Free Survival, Transplantation, Autologous, Stem Cell Transplantation, Hematopoietic Stem Cell Transplantation, Lymphoma, Follicular radiotherapy
- Abstract
Background: Optimal consolidation for young patilents with relapsed/refractory (R/R) follicular lymphoma (FL) remains uncertain in the rituximab era, with an unclear benefit of autologous stem cell transplantation (ASCT). The multicenter, randomized, phase III FLAZ12 (NCT01827605) trial compared anti-CD20 radioimmunotherapy (RIT) with ASCT as consolidation after chemoimmunotherapy, both followed by rituximab maintenance., Patients and Methods: Patients (age 18-65 years) with R/R FL and without significant comorbidities were enrolled and treated with three courses of conventional, investigator-chosen chemoimmunotherapies. Those experiencing at least a partial response were randomized 1 : 1 to ASCT or RIT before CD34+ collection, and all received postconsolidation rituximab maintenance. Progression-free survival (PFS) was the primary endpoint. The target sample size was 210 (105/group)., Results: Between August 2012 and September 2019, of 164 screened patients, 159 were enrolled [median age 57 (interquartile range 49-62) years, 55% male, 57% stage IV, 20% bulky disease]. The study was closed prematurely because of low accrual. Data were analyzed on 8 June 2023, on an intention-to-treat basis, with a 77-month median follow-up from enrollment. Of the 141 patients (89%), 70 were randomized to ASCT and 71 to RIT. The estimated 3-year PFS in both groups was 62% (hazard ratio 1.11, 95% confidence interval 0.69-1.80, P = 0.6662). The 3-year overall survival also was similar between the two groups. Rates of grade ≥3 hematological toxicity were 94% with ASCT versus 46% with RIT (P < 0.001), and grade ≥3 neutropenia occurred in 94% versus 41%, respectively (P < 0.001). Second cancers occurred in nine patients after ASCT and three after radioimmunotherapy (P = 0.189)., Conclusions: Even if prematurely discontinued, our study did not demonstrate the superiority of ASCT versus RIT. ASCT was more toxic and demanding for patients and health services. Both strategies yielded similar, favorable long-term outcomes, suggesting that consolidation programs milder than ASCT require further investigation in R/R FL., (Copyright © 2023 The Author(s). Published by Elsevier Ltd.. All rights reserved.)
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- 2024
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43. Plasma-derived extracellular vesicles released after endurance exercise exert cardioprotective activity through the activation of antioxidant pathways.
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Lisi V, Senesi G, Bertola N, Pecoraro M, Bolis S, Gualerzi A, Picciolini S, Raimondi A, Fantini C, Moretti E, Parisi A, Sgrò P, Di Luigi L, Geiger R, Ravera S, Vassalli G, Caporossi D, and Balbi C
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- Male, Humans, Young Adult, Adult, Antioxidants metabolism, Reactive Oxygen Species metabolism, Hydrogen Peroxide metabolism, Proteomics, Extracellular Vesicles, Cardiovascular Diseases metabolism
- Abstract
Cardiovascular diseases (CVD) can cause various conditions, including an increase in reactive oxygen species (ROS) levels that can decrease nitric oxide (NO) availability and promote vasoconstriction, leading to arterial hypertension. Physical exercise (PE) has been found to be protective against CVD by helping to maintain redox homeostasis through a decrease in ROS levels, achieved by increased expression of antioxidant enzymes (AOEs) and modulation of heat shock proteins (HSPs). Extracellular vesicles (EVs) circulating in the body are a major source of regulatory signals, including proteins and nucleic acids. Interestingly, the cardioprotective role of EVs released after PE has not been fully described. The aim of this study was to investigate the role of circulating EVs, obtained through Size Exclusion Chromatography (SEC) of plasma samples from healthy young males (age: 26.95 ± 3.07; estimated maximum oxygen consumption rate (VO
2max ): 51.22 ± 4.85 (mL/kg/min)) at basal level (Pre_EVs) and immediately after a single bout of endurance exercise (30' treadmill, 70% heart rate (HR) -Post_EVs). Gene ontology (GO) analysis of proteomic data from isolated EVs, revealed enrichment in proteins endowed with catalytic activity in Post_EVs, compare to Pre_EVs, with MAP2K1 being the most significantly upregulated protein. Enzymatic assays on EVs derived from Pre and Post samples showed increment in Glutathione Reductase (GR) and Catalase (CAT) activity in Post_EVs. At functional level, Post_EVs, but not Pre_EVs, enhanced the activity of antioxidant enzymes (AOEs) and reduced oxidative damage accumulation in treated human iPS-derived cardiomyocytes (hCM) at basal level and under stress conditions (Hydrogen Peroxide (H2 O2 ) treatment), resulting in a global cardioprotective effect. In conclusion, our data demonstrated, for the first time, that a single 30-min endurance exercise is able to alter the cargo of circulating EVs, resulting in cardioprotective effect through antioxidant activity., Competing Interests: Declaration of competing interest Authors declare no conflict of interest., (Copyright © 2023 The Author(s). Published by Elsevier B.V. All rights reserved.)- Published
- 2023
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44. A dynamic clamping approach using in silico IK1 current for discrimination of chamber-specific hiPSC-derived cardiomyocytes.
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Altomare C, Bartolucci C, Sala L, Balbi C, Burrello J, Pietrogiovanna N, Burrello A, Bolis S, Panella S, Arici M, Krause R, Rocchetti M, Severi S, and Barile L
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- Humans, Myocytes, Cardiac, Constriction, Reproducibility of Results, Induced Pluripotent Stem Cells, Atrial Fibrillation
- Abstract
Human induced pluripotent stem cell (hiPSC)-derived cardiomyocytes (CM) constitute a mixed population of ventricular-, atrial-, nodal-like cells, limiting the reliability for studying chamber-specific disease mechanisms. Previous studies characterised CM phenotype based on action potential (AP) morphology, but the classification criteria were still undefined. Our aim was to use in silico models to develop an automated approach for discriminating the electrophysiological differences between hiPSC-CM. We propose the dynamic clamp (DC) technique with the injection of a specific I
K1 current as a tool for deriving nine electrical biomarkers and blindly classifying differentiated CM. An unsupervised learning algorithm was applied to discriminate CM phenotypes and principal component analysis was used to visualise cell clustering. Pharmacological validation was performed by specific ion channel blocker and receptor agonist. The proposed approach improves the translational relevance of the hiPSC-CM model for studying mechanisms underlying inherited or acquired atrial arrhythmias in human CM, and for screening anti-arrhythmic agents., (© 2023. The Author(s).)- Published
- 2023
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45. Identification of a serum and urine extracellular vesicle signature predicting renal outcome after kidney transplant.
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Burrello J, Monticone S, Burrello A, Bolis S, Cristalli CP, Comai G, Corradetti V, Grange C, Orlando G, Bonafè M, La Manna G, Barile L, and Bussolati B
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- Humans, Endothelial Cells, Kidney, Biomarkers urine, Glomerular Filtration Rate, Kidney Transplantation, Extracellular Vesicles, Body Fluids
- Abstract
Background: A long-standing effort is dedicated towards the identification of biomarkers allowing the prediction of graft outcome after kidney transplant. Extracellular vesicles (EVs) circulating in body fluids represent an attractive candidate, as their cargo mirrors the originating cell and its pathophysiological status. The aim of the study was to investigate EV surface antigens as potential predictors of renal outcome after kidney transplant., Methods: We characterized 37 surface antigens by flow cytometry, in serum and urine EVs from 58 patients who were evaluated before, and at 10-14 days, 3 months and 1 year after transplant, for a total of 426 analyzed samples. The outcome was defined according to estimated glomerular filtration rate (eGFR) at 1 year., Results: Endothelial cells and platelets markers (CD31, CD41b, CD42a and CD62P) in serum EVs were higher at baseline in patients with persistent kidney dysfunction at 1 year, and progressively decreased after kidney transplant. Conversely, mesenchymal progenitor cell marker (CD1c, CD105, CD133, SSEEA-4) in urine EVs progressively increased after transplant in patients displaying renal recovery at follow-up. These markers correlated with eGFR, creatinine and proteinuria, associated with patient outcome at univariate analysis and were able to predict patient outcome at receiver operating characteristics curves analysis. A specific EV molecular signature obtained by supervised learning correctly classified patients according to 1-year renal outcome., Conclusions: An EV-based signature, reflecting the cardiovascular profile of the recipient, and the repairing/regenerative features of the graft, could be introduced as a non-invasive tool for a tailored management of follow-up of patients undergoing kidney transplant., (© The Author(s) 2022. Published by Oxford University Press on behalf of the ERA.)
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- 2023
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46. A microfluidic model of human vascularized breast cancer metastasis to bone for the study of neutrophil-cancer cell interactions.
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Crippa M, Talò G, Lamouline A, Bolis S, Arrigoni C, Bersini S, and Moretti M
- Abstract
The organ-specific metastatization of breast cancer to bone is driven by specific interactions between the host microenvironment and cancer cells (CCs). However, it is still unclear the role that circulating immune cells, including neutrophils, play during bone colonization (i.e. pro-tumoral vs. anti-tumoral). Here, we aimed at analyzing the migratory behavior of neutrophils when exposed to breast CCs colonizing the bone and their contribution to the growth of breast cancer micrometastases. Based on our previous bone metastasis models, we designed a microfluidic system that allows to independently introduce human vascularized breast cancer metastatic seeds within a bone-mimicking microenvironment containing osteo-differentiated mesenchymal stromal cells and endothelial cells (ECs). ECs self-assembled into microvascular networks and connected the bone-mimicking microenvironment with the metastatic seed. Compared to controls without CCs, metastatic seeds compromised the architecture of microvascular networks resulting in a lower number of junctions (5.7 ± 1.2 vs. 18.8 ± 4.5, p = 0.025) and shorter network length (10.5 ± 1.0 vs. 13.4 ± 0.8 [mm], p = 0.042). Further, vascular permeability was significantly higher with CCs (2.60 × 10
-8 ± 3.59 × 10-8 vs. 0.53 × 10-8 ± 0.44 × 10-8 [cm/s], p = 0.05). Following metastatic seed maturation, neutrophils were injected into microvascular networks resulting in a higher extravasation rate when CCs were present (27.9 ± 13.7 vs. 14.7 ± 12.4 [%], p = 0.01). Strikingly, the percentage of dying CCs increased in presence of neutrophils, as confirmed by confocal imaging and flow cytometry on isolated cells from the metastatic seeds. The biofabricated metastatic niche represents a powerful tool to analyze the mechanisms of interaction between circulating immune cells and organ-specific micrometastases and to test novel drug combinations targeting the metastatic microenvironment., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2022 The Authors.)- Published
- 2022
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47. Risk stratification of patients with SARS-CoV-2 by tissue factor expression in circulating extracellular vesicles.
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Burrello J, Caporali E, Gauthier LG, Pianezzi E, Balbi C, Rigamonti E, Bolis S, Lazzarini E, Biemmi V, Burrello A, Frigerio R, Martinetti G, Fusi-Schmidhauser T, Vassalli G, Ferrari E, Moccetti T, Gori A, Cretich M, Melli G, Monticone S, and Barile L
- Subjects
- Biomarkers metabolism, Humans, Reproducibility of Results, Risk Assessment methods, SARS-CoV-2, Thromboplastin metabolism, COVID-19 diagnosis, Extracellular Vesicles metabolism
- Abstract
Inflammatory response following SARS-CoV-2 infection results in substantial increase of amounts of intravascular pro-coagulant extracellular vesicles (EVs) expressing tissue factor (CD142) on their surface. CD142-EV turned out to be useful as diagnostic biomarker in COVID-19 patients. Here we aimed at studying the prognostic capacity of CD142-EV in SARS-CoV-2 infection. Expression of CD142-EV was evaluated in 261 subjects admitted to hospital for pneumonia and with a positive molecular test for SARS-CoV-2. The study population consisted of a discovery cohort of selected patients (n = 60) and an independent validation cohort including unselected consecutive enrolled patients (n = 201). CD142-EV levels were correlated with post-hospitalization course of the disease and compared to the clinically available 4C Mortality Score as referral. CD142-EV showed a reliable performance to predict patient prognosis in the discovery cohort (AUC = 0.906) with an accuracy of 81.7%, that was confirmed in the validation cohort (AUC = 0.736). Kaplan-Meier curves highlighted a high discrimination power in unselected subjects with CD142-EV being able to stratify the majority of patients according to their prognosis. We obtained a comparable accuracy, being not inferior in terms of prediction of patients' prognosis and risk of mortality, with 4C Mortality Score. The expression of surface vesicular CD142 and its reliability as prognostic marker was technically validated using different immunocapture strategies and assays. The detection of CD142 on EV surface gains considerable interest as risk stratification tool to support clinical decision making in COVID-19., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 Elsevier Inc. All rights reserved.)
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- 2022
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48. Stress-induced premature senescence is associated with a prolonged QT interval and recapitulates features of cardiac aging.
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Lazzarini E, Lodrini AM, Arici M, Bolis S, Vagni S, Panella S, Rendon-Angel A, Saibene M, Metallo A, Torre T, Vassalli G, Ameri P, Altomare C, Rocchetti M, and Barile L
- Subjects
- Action Potentials, Aged, Animals, Calcium metabolism, Cellular Senescence, Humans, Mice, Myocytes, Cardiac metabolism, Sarcoplasmic Reticulum metabolism, Induced Pluripotent Stem Cells metabolism
- Abstract
Rationale: Aging in the heart is a gradual process, involving continuous changes in cardiovascular cells, including cardiomyocytes (CMs), namely cellular senescence. These changes finally lead to adverse organ remodeling and resulting in heart failure. This study exploits CMs from human induced pluripotent stem cells (iCMs) as a tool to model and characterize mechanisms involved in aging. Methods and Results: Human somatic cells were reprogrammed into human induced pluripotent stem cells and subsequently differentiated in iCMs. A senescent-like phenotype (SenCMs) was induced by short exposure (3 hours) to doxorubicin (Dox) at the sub-lethal concentration of 0.2 µM. Dox treatment induced expression of cyclin-dependent kinase inhibitors p21 and p16, and increased positivity to senescence-associated beta-galactosidase when compared to untreated iCMs. SenCMs showed increased oxidative stress, alteration in mitochondrial morphology and depolarized mitochondrial membrane potential, which resulted in decreased ATP production. Functionally, when compared to iCMs, SenCMs showed, prolonged multicellular QTc and single cell APD, with increased APD variability and delayed afterdepolarizations (DADs) incidence, two well-known arrhythmogenic indexes. These effects were largely ascribable to augmented late sodium current (I
NaL ) and reduced delayed rectifier potassium current (Ikr). Moreover sarcoplasmic reticulum (SR) Ca2+ content was reduced because of downregulated SERCA2 and increased RyR2-mediated Ca2+ leak. Electrical and intracellular Ca2+ alterations were mostly justified by increased CaMKII activity in SenCMs. Finally, SenCMs phenotype was furtherly confirmed by analyzing physiological aging in CMs isolated from old mice in comparison to young ones. Conclusions: Overall, we showed that SenCMs recapitulate the phenotype of aged primary CMs in terms of senescence markers, electrical and Ca2+ handling properties and metabolic features. Thus, Dox-induced SenCMs can be considered a novel in vitro platform to study aging mechanisms and to envision cardiac specific anti-aging approach in humans., Competing Interests: Competing Interests: The authors have declared that no competing interest exists., (© The author(s).)- Published
- 2022
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49. Supervised and unsupervised learning to define the cardiovascular risk of patients according to an extracellular vesicle molecular signature.
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Burrello J, Burrello A, Vacchi E, Bianco G, Caporali E, Amongero M, Airale L, Bolis S, Vassalli G, Cereda CW, Mulatero P, Bussolati B, Camici GG, Melli G, Monticone S, and Barile L
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- Biomarkers, Cross-Sectional Studies, Heart Disease Risk Factors, Humans, Risk Factors, Unsupervised Machine Learning, Cardiovascular Diseases complications, Extracellular Vesicles metabolism, Heart Failure metabolism, Hypertension complications
- Abstract
Cardiovascular (CV) disease represents the most common cause of death in developed countries. Risk assessment is highly relevant to intervene at individual level and implement prevention strategies. Circulating extracellular vesicles (EVs) are involved in the development and progression of CV diseases and are considered promising biomarkers. We aimed at identifying an EV signature to improve the stratification of patients according to CV risk and likelihood to develop fatal CV events. EVs were characterized by nanoparticle tracking analysis and flow cytometry for a standardized panel of 37 surface antigens in a cross-sectional multicenter cohort (n = 486). CV profile was defined by presence of different indicators (age, sex, body mass index, hypertension, hyperlipidemia, diabetes, coronary artery disease, cardiac heart failure, chronic kidney disease, smoking habit, organ damage) and according to the 10-year risk of fatal CV events estimated using SCORE charts of European Society of Cardiology. By combining expression levels of EV antigens using unsupervised learning, patients were classified into 3 clusters: Cluster-I (n = 288), Cluster-II (n = 83), Cluster-III (n = 30). A separate analysis was conducted on patients displaying acute CV events (n = 82). Prevalence of hypertension, diabetes, chronic heart failure, and organ damage (defined as left ventricular hypertrophy and/or microalbuminuria) increased progressively from Cluster-I to Cluster-III. Several EV antigens, including markers for platelets (CD41b-CD42a-CD62P), leukocytes (CD1c-CD2-CD3-CD4-CD8-CD14-CD19-CD20-CD25-CD40-CD45-CD69-CD86), and endothelium (CD31-CD105) were independently associated with CV risk indicators and correlated to age, blood pressure, glucometabolic profile, renal function, and SCORE risk. EV profiling, obtained from minimally invasive blood sampling, allows accurate patient stratification according to CV risk profile., (Copyright © 2022 Elsevier Inc. All rights reserved.)
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- 2022
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50. Response-Adapted Postinduction Strategy in Patients With Advanced-Stage Follicular Lymphoma: The FOLL12 Study.
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Luminari S, Manni M, Galimberti S, Versari A, Tucci A, Boccomini C, Farina L, Olivieri J, Marcheselli L, Guerra L, Ferrero S, Arcaini L, Cavallo F, Kovalchuk S, Skrypets T, Del Giudice I, Chauvie S, Patti C, Stelitano C, Ricci F, Pinto A, Margiotta Casaluci G, Zilioli VR, Merli A, Ladetto M, Bolis S, Pavone V, Chiarenza A, Arcari A, Anastasia A, Dondi A, Mannina D, and Federico M
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- Cyclophosphamide administration & dosage, Doxorubicin administration & dosage, Female, Follow-Up Studies, Humans, Lymphoma, Follicular pathology, Male, Middle Aged, Prednisone administration & dosage, Prognosis, Prospective Studies, Rituximab administration & dosage, Survival Rate, Vincristine administration & dosage, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Induction Chemotherapy mortality, Lymphoma, Follicular drug therapy
- Abstract
Purpose: We compared 2 years of rituximab maintenance (RM) with a response-adapted postinduction approach in patients with follicular lymphoma who responded to induction immunochemotherapy., Methods: We randomly assigned treatment-naïve, advanced-stage, high-tumor burden follicular lymphoma patients to receive standard RM or a response-adapted postinduction approach on the basis of metabolic response and molecular assessment of minimal residual disease (MRD). The experimental arm used three types of postinduction therapies: for complete metabolic response (CMR) and MRD-negative patients, observation; for CMR and MRD-positive (end of induction or follow-up) patients, four doses of rituximab (one per week, maximum three courses) until MRD-negative; and for non-CMR patients, one dose of ibritumomab tiuxetan followed by standard RM. The study was designed as noninferiority trial with progression-free survival (PFS) as the primary end point., Results: Overall, 807 patients were randomly assigned. After a median follow-up of 53 months (range, 1-92 months), patients in the standard arm had a significantly better PFS than those in the experimental arm (3-year PFS 86% v 72%; P < .001). The better PFS of the standard versus experimental arm was confirmed in all the study subgroups except non-CMR patients (n = 65; P = .274). The 3-year overall survival was 98% (95% CI, 96 to 99) and 97% (95% CI, 95 to 99) in the reference and experimental arms, respectively ( P = .238)., Conclusion: A metabolic and molecular response-adapted therapy as assessed in the FOLL12 study was associated with significantly inferior PFS compared with 2-year RM. The better efficacy of standard RM was confirmed in the subgroup analysis and particularly for patients achieving both CMR and MRD-negative., Competing Interests: Stefano LuminariConsulting or Advisory Role: Roche, Gilead Sciences, Celgene, Genmab, Regeneron, IncyteTravel, Accommodations, Expenses: Janssen, Celgene Sara GalimbertiSpeakers' Bureau: Novartis Italy, Jazz Pharmaceuticals, Incyte, AbbVieTravel, Accommodations, Expenses: Jazz Pharmaceuticals, Janssen Oncology, Incyte, Novartis Italy Annibale VersariConsulting or Advisory Role: NovartisTravel, Accommodations, Expenses: Novartis Alessandra TucciConsulting or Advisory Role: Janssen, TakedaTravel, Accommodations, Expenses: Sandoz Luigi MarcheselliUncompensated Relationships: Sandoz SpA Simone FerreroConsulting or Advisory Role: Janssen-Cilag, EUSA Pharma, Clinigen Group, IncyteSpeakers' Bureau: Janssen-Cilag, Servier, EUSA Pharma, GentiliResearch Funding: Gilead Sciences (Inst), MorphoSys (Inst), Janssen (Inst)Travel, Accommodations, Expenses: Roche, Servier, Sanofi, Janssen-Cilag, EUSA Pharma, Gentili Luca ArcainiConsulting or Advisory Role: Roche, Janssen-Cilag, Verastem, Incyte, EUSA Pharma, Celgene/Bristol Myers SquibbSpeakers' Bureau: EUSA PharmaResearch Funding: Gilead SciencesTravel, Accommodations, Expenses: Roche, Celgene, Janssen-Cilag, EUSA Pharma Federica CavalloHonoraria: ServierConsulting or Advisory Role: Gilead Sciences, RocheTravel, Accommodations, Expenses: Celgene Tetiana SkrypetsHonoraria: Takeda Ilaria del GiudiceConsulting or Advisory Role: Tolero Pharmaceuticals, AstraZeneca Stephane ChauvieStock and Other Ownership Interests: DixitHonoraria: Sirtex MedicalSpeakers' Bureau: TERUMO, Sirtex MedicalResearch Funding: Roche Antonello PintoHonoraria: Roche/Genentech, Merck Sharp & Dohme, Bristol Myers Squibb, Celgene, Servier, IncyteConsulting or Advisory Role: Servier, Roche/Genentech, Merck, TakedaSpeakers' Bureau: Roche/Genentech Marco LadettoHonoraria: AbbVie, Amgen, ADC Therapeutics, BeiGene, Celgene, Gentili, Kite/Gilead, Novartis, Incyte, Janssen, Jazz Pharmaceuticals, Regeneron, RocheConsulting or Advisory Role: Jazz Pharmaceuticals, Roche, Janssen, Regeneron, Gilead Sciences, Novartis, IncyteSpeakers' Bureau: IncyteResearch Funding: ADC Therapeutics (Inst), Janssen (Inst) Annalisa ChiarenzaConsulting or Advisory Role: Roche/Genentech Annalisa ArcariConsulting or Advisory Role: Janssen-CilagTravel, Accommodations, Expenses: Janssen-Cilag, Takeda Massimo FedericoConsulting or Advisory Role: Takeda, Menarini, Erytech Pharma, MedivationTravel, Accommodations, Expenses: Takeda Pharmaceutical Taiwan, LTDNo other potential conflicts of interest were reported.
- Published
- 2022
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