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1.
J Mol Cell Cardiol ; 187: 65-79, 2024 02.
Artículo en Inglés | MEDLINE | ID: mdl-38181546

RESUMEN

BACKGROUND: Vascular calcification (VC) is a prevalent independent risk factor for adverse cardiovascular events and is associated with diabetes, hypertension, chronic kidney disease, and atherosclerosis. However, the mechanisms regulating the osteogenic differentiation of vascular smooth muscle cells (VSMC) are not fully understood. METHODS: Using hydrogels of tuneable stiffness and lysyl oxidase-mediated stiffening of human saphenous vein ex vivo, we investigated the role of substrate stiffness in the regulation of VSMC calcification. RESULTS: We demonstrate that increased substrate stiffness enhances VSMC osteogenic differentiation and VSMC calcification. We show that the effects of substrate stiffness are mediated via a reduction in the level of actin monomer within the nucleus. We show that in cells interacting with soft substrate, elevated levels of nuclear actin monomer repress osteogenic differentiation and calcification by repressing YAP-mediated activation of both TEA Domain transcription factor (TEAD) and RUNX Family Transcription factor 2 (RUNX2). CONCLUSION: This work highlights for the first time the role of nuclear actin in mediating substrate stiffness-dependent VSMC calcification and the dual role of YAP-TEAD and YAP-RUNX2 transcriptional complexes.


Asunto(s)
Actinas , Calcificación Vascular , Humanos , Subunidad alfa 1 del Factor de Unión al Sitio Principal/genética , Músculo Liso Vascular , Osteogénesis , Células Cultivadas , Miocitos del Músculo Liso
2.
J Clin Pediatr Dent ; 37(4): 397-402, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-24046989

RESUMEN

OBJECTIVE: To evaluate the applicability as a sealant of a new self-adhering flowable resin composite (Vertise Flow, Kerr, VF) by assessing shear bond strength (SBS) to unground enamel and microleakage (microLKG) in sealed pits and fissures. STUDY DESIGN: Marketed sealants to be used in combination with phosphoric acid (Guardian Seal, Kerr, GS) or with a self-etch adhesive (Adper Prompt-L-Pop/Clinpro Sealant, 3M ESPE, CS) were compared to VF. For SBS testing on unground enamel 10 molars per group were used. For microLKG assessment, pits and fissures sealing was performed in 12 molars per group. The sealed teeth were immersed in a 50% weight silver nitrate solution for 24 hours and the extent of interfacial leakage was measured. Between-group differences in SBS were assessed using One-Way Analysis of Variance (ANOVA), followed by Tukey test (p < 0.05). microLKG data were analyzed with Kruskall-Wallis ANOVA (p > 0.05). RESULTS: SBS of VF was statistically similar to that measured by CS and higher than that of GS. Interfacial leakage was similar in the three groups. CONCLUSIONS: The finding of satisfactory bond strength and sealing ability of VF when compared to the marketed sealants encourages the use of VF in pit and fissure sealing.


Asunto(s)
Resinas Compuestas , Recubrimiento Dental Adhesivo , Selladores de Fosas y Fisuras , Cementos de Resina , Análisis de Varianza , Esmalte Dental , Filtración Dental/prevención & control , Análisis del Estrés Dental , Humanos , Resistencia al Corte , Estadísticas no Paramétricas , Viscosidad
3.
Int J Comput Dent ; 13(4): 331-40, 2010.
Artículo en Inglés, Alemán | MEDLINE | ID: mdl-21323013

RESUMEN

TriLuxe ceramic blocks for chairside CAD/CAM procedures are color layered to allow natural esthetics, and only require subsequent glazing. The purpose of this study was to compare color repeatability of different batches of TriLuxe blocks. The three commercially available shades (1M2C, 2M2C, 3M2C) of TriLuxe blocks for the Cerec CAD/CAM system were examined. For each of the three colors, three different batches were tested, 5 blocks each. The measurements were made using a spectrophotometer equipped with an integrating sphere using the CIELab* colorimetric system. One-way ANOVA showed that the factor "Production Batch" was not statistically significant. Regarding deltaE, none of the 315 color comparisons (neither within the same shade, nor between specimens of the same batch, nor between specimens from different batches) exceeded the proposed deltaE = 3.3 threshold for clinical acceptability. All the different batches of the different shades of VITA TriLuxe blocks for the Cerec system showed the high degree of color correspondence necessary in industrially prefabricated CAD/CAM blocks.


Asunto(s)
Diseño Asistido por Computadora , Porcelana Dental , Diseño de Prótesis Dental , Coloración de Prótesis , Color , Colorimetría , Coronas , Incrustaciones , Reproducibilidad de los Resultados , Espectrofotometría
4.
Clin Exp Rheumatol ; 26(1): 103-8, 2008.
Artículo en Inglés | MEDLINE | ID: mdl-18328154

RESUMEN

OBJECTIVE: In patients with rheumatoid arthritis (RA), long-term therapy with anti-tumor necrosis factor (TNF) antibodies sensitizes the pituitary gland and improves adrenal androgen secretion in prednisolone-naïve patients. However, whether this is similar in psoriatic arthritis (PsA) is not known. The aim of this study was to assess the effect of 12 weeks of etanercept treatment upon the function of the HPA axis in patients with PsA. METHODS: Eleven prednisolone-naïve patients (mean age 47.3+/-8.9 years) with PsA were included. We measured serum levels of adrenocorticotropic hormone (ACTH), 17-hydroxyprogesterone (17OHP), cortisol, and androstenedione (ASD), at baseline and at 4 and 12 weeks after initiation of anti-TNF therapy (etanercept, 50 mg every week as a single dose by sc. injection). Clinical improvement was assessed using the Disease Activity Score-28 (DAS-28). RESULTS: Mean levels of serum ACTH, serum cortisol, serum 17OHP and serum ASD did not markedly change during 12 weeks of etanercept treatment. Similarly, the ratio of serum cortisol divided by serum ACTH did not change during 12 weeks of anti-TNF treatment. However, an increase of serum cortisol relative to serum 17OHP or ASD was related to clinical improvement. This indicates that improvement was linked to higher serum cortisol levels relative to others adrenal hormones. CONCLUSION: This is the first study to demonstrate baseline serum levels and the course of HPA axis-related hormones in patients with PsA. An increase of serum cortisol relative to others adrenocortical hormones (i.e., androstenedione and ACTH) was accompanied by clinical improvement.


Asunto(s)
Antirreumáticos/uso terapéutico , Artritis Psoriásica/sangre , Artritis Psoriásica/tratamiento farmacológico , Hidrocortisona/sangre , Inmunoglobulina G/uso terapéutico , Receptores del Factor de Necrosis Tumoral/uso terapéutico , 17-alfa-Hidroxiprogesterona/sangre , Hormona Adrenocorticotrópica/sangre , Adulto , Androstenodiona/sangre , Antirreumáticos/farmacología , Etanercept , Femenino , Humanos , Sistema Hipotálamo-Hipofisario/efectos de los fármacos , Inmunoglobulina G/farmacología , Masculino , Persona de Mediana Edad , Sistema Hipófiso-Suprarrenal/efectos de los fármacos
5.
Oper Dent ; 43(1): 90-100, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-29284101

RESUMEN

OBJECTIVE: To assess the efficacy of dedicated finishing/polishing systems on roughness and gloss of VITA Suprinity and IPS e.max CAD. METHOD: A total of 24 blocks of Suprinity and 24 of e.max were cut into a wedge shape using an InLab MC-XL milling unit. After crystallization, the 24 Suprinity wedges were divided into four subgroups: group A.1: Suprinity Polishing Set Clinical used for 30 seconds and group A.2: for 60 seconds; group A.3: VITA Akzent Plus Paste; and group A.4: spray. The 24 e.max wedges (group B) were divided into four subgroups according to the finishing procedure: group B.1: Optrafine Ceramic Polishing System for 30 seconds and group B.2: for 60 seconds; group B.3: IPS e.max CAD Crystall/Glaze paste; and group B.4: spray. After finishing/polishing, gloss was assessed with a glossmeter and roughness evaluated with a profilometer. Results were analyzed by applying a two-way analysis of variance for gloss and another for roughness (α=0.05). One specimen per each subgroup was observed with a scanning electron microscope. RESULTS: For roughness, materials and surface were significant factors ( p<0.001). Suprinity exhibited significantly lower roughness than e.max. Also the Material-Surface Treatment interaction was statistically significant ( p=0.026). For gloss, both material and surface treatment were significant factors ( p<0.001). VITA Suprinity showed significantly higher gloss than e.max. Also the Material-Surface Treatment interaction was statistically significant ( p<0.001). CONCLUSIONS: Manual finishing/polishing for 60 seconds and glazing paste are the most effective procedures in lowering the roughness of CAD/CAM silica-based glass ceramics. Manual finishing/polishing for 60 seconds allows milled silica-based glass ceramics to yield a higher gloss. VITA Suprinity displayed higher polishability than IPS e.max CAD.


Asunto(s)
Cerámica , Diseño Asistido por Computadora , Pulido Dental , Porcelana Dental , Restauración Dental Permanente/métodos , Circonio , Cerámica/uso terapéutico , Porcelana Dental/uso terapéutico , Humanos , Técnicas In Vitro , Litio , Silicatos , Propiedades de Superficie , Circonio/uso terapéutico
6.
Oper Dent ; 42(2): 175-184, 2017.
Artículo en Inglés | MEDLINE | ID: mdl-27723423

RESUMEN

OBJECTIVES: To evaluate surface roughness and gloss of feldspathic ceramic blocks for chairside CAD/CAM systems before and after finishing and polishing. METHODS: VITA Mark II ceramic blocks for the CEREC CAD/CAM system were cut perpendicularly in order to obtain a total of 70 specimens (14 × 18 × 3 mm). The flat surface was roughened using a grinder/polisher with dry 120-grit silicone-carbide paper. Surface roughness and gloss were measured using a digital profilometer (Ra) and a glossmeter (GU), respectively. Specimens were randomly divided into seven groups (n=10) based on the finishing/polishing system as follows: 1) Identoflex NGPorcelain Polisher (INP), 2) Identoflex Diamond Ceramic Polisher (IDP), 3) Hiluster Polishing System (HPS), 4) OptraFine (OF), 5) Identoflex Lucent (IL), 6) VITA Akzent Glaze Spray (AGS), and 7) VITA Shading Paste and Liquid (SPL). Surface analysis was repeated after the finishing/polishing treatment, and the obtained data were compared to the baseline in order to evaluate the ΔRa and ΔGU. Results were statistically analyzed. The surface morphology was observed by scanning electron microscopy. RESULTS: The mean surface roughness of polished systems increased in the order (statistical groups designated) SPLa < ILa < OFab < IDPbc < AGSbc < INPbc < HPSc and mean gloss decreased in the order AGSa > SPLa > OFab > ILabc > HPSbcd > INPcd > IDPd. CONCLUSIONS: The smoothest surface of CAD/CAM feldspathic ceramic blocks was achieved using the furnace-based glaze systems VITA Akzent Glaze Spray and VITA Shading Paste and Liquid and manual systems Identoflex Lucent and OptraFine.


Asunto(s)
Cerámica/química , Diseño Asistido por Computadora , Pulido Dental/métodos , Porcelana Dental/química , Ensayo de Materiales , Microscopía Electrónica de Rastreo , Propiedades de Superficie
7.
J Dent Res ; 96(13): 1490-1497, 2017 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-28771388

RESUMEN

Biomechanical integrity of endodontically treated teeth (ETT) is often compromised. Degree of hard tissue loss and type of final prosthetic restoration should be carefully considered when making a treatment plan. The objective of this prospective clinical trial was to assess the influence of the type of prosthetic restoration as well as the degree of hard tissue loss on 7-y clinical performance of ETT restored with fiber posts. Two groups ( n = 60) were defined depending on the type of prosthetic restoration needed: 1) single unit porcelain-fused-to-metal (PFM) crowns (SCs) and 2) 3- to 4-unit PFM fixed dental prostheses (FDPs), with 1 healthy and 1 endodontically treated and fiber post-restored abutment. Within each group, samples were divided into 2 subgroups ( n = 30) according to the amount of residual coronal tissues after abutment buildup and final preparation: A) >50% of coronal residual structure or B) equal to or <50% of coronal residual structure. The clinical outcome was assessed based on clinical and intraoral radiographic examinations at the recalls after 6, 12, 24, 36, 48, and 84 mo. Data were analyzed by Kaplan-Meier log-rank test and Cox regression analysis ( P < 0.05). The overall 7-y survival rate of ETT restored with fiber post and either SCs or FDPs was 69.2%. The highest 84-mo survival rate was recorded in group 1A (90%), whereas teeth in group 2B exhibited the lowest performance (56.7% survival rate). The log-rank test detected statistically significant differences in survival rates among the groups ( P = 0.048). Cox regression analysis revealed that the amount of residual coronal structure ( P = 0.041; hazard ratio [HR], 2.026; 95% confidence interval [CI] for HR, 1.031-3.982) and the interaction between the type of prosthetic restoration and the amount of residual coronal structure ( P = 0.024; HR, 1.372; 95% CI for HR, 1.042-1.806) were statistically significant factors for survival ( ClinicalTrials.gov NCT01532947).


Asunto(s)
Coronas , Dentadura Parcial Fija , Técnica de Perno Muñón , Diente no Vital/rehabilitación , Adolescente , Adulto , Anciano , Fracaso de la Restauración Dental , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Resultado del Tratamiento
8.
Bone Marrow Transplant ; 52(1): 114-119, 2017 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-27668762

RESUMEN

Carbapenemase-producing Klebsiella pneumoniae (KPC-Kp) infections are an emerging cause of death after hematopoietic stem cell transplantation (HSCT). In allogeneic transplants, mortality rate may rise up to 60%. We retrospectively evaluated 540 patients receiving a transplant from an auto- or an allogeneic source between January 2011 and October 2015. After an Institutional increase in the prevalence of KPC-Kp bloodstream infections (BSI) in June 2012, from July 2012, 366 consecutive patients received the following preventive measures: (i) weekly rectal swabs for surveillance; (ii) contact precautions in carriers (iii) early-targeted therapy in neutropenic febrile carriers. Molecular typing identified KPC-Kp clone ST512 as the main clone responsible for colonization, BSI and outbreaks. After the introduction of these preventive measures, the cumulative incidence of KPC-Kp BSI (P=0.01) and septic shocks (P=0.01) at 1 year after HSCT was significantly reduced. KPC-Kp infection-mortality dropped from 62.5% (pre-intervention) to 16.6% (post-intervention). Day 100 transplant-related mortality and KPC-Kp infection-related mortality after allogeneic HSCT were reduced from 22% to 10% (P=0.001) and from 4% to 1% (P=0.04), respectively. None of the pre-HSCT carriers was excluded from transplant. These results suggest that active surveillance, contact precautions and early-targeted therapies, may efficiently control KPC-Kp spread and related mortality even after allogeneic HSCT.


Asunto(s)
Proteínas Bacterianas/biosíntesis , Neoplasias Hematológicas , Trasplante de Células Madre Hematopoyéticas , Infecciones por Klebsiella , Klebsiella pneumoniae , Choque Séptico , beta-Lactamasas/biosíntesis , Adolescente , Adulto , Anciano , Aloinjertos , Autoinjertos , Femenino , Estudios de Seguimiento , Neoplasias Hematológicas/mortalidad , Neoplasias Hematológicas/terapia , Humanos , Infecciones por Klebsiella/genética , Infecciones por Klebsiella/mortalidad , Infecciones por Klebsiella/terapia , Klebsiella pneumoniae/genética , Klebsiella pneumoniae/metabolismo , Klebsiella pneumoniae/patogenicidad , Masculino , Persona de Mediana Edad , Choque Séptico/genética , Choque Séptico/mortalidad , Choque Séptico/terapia
9.
Clin Exp Rheumatol ; 24(1 Suppl 40): S60-6, 2006.
Artículo en Inglés | MEDLINE | ID: mdl-16466626

RESUMEN

Cutaneous lesions are frequent in medium-sized and small vessel systemic vasculitides. The classic cutaneous manifestation of vasculitis is palpable purpura; however the clinical manifestations greatly depend on the size of the vessels affected. They usually do not affect prognosis but relapsing or intractable forms have been described. When skin manifestations are only one of the clinical signs of vasculitis, treatment with corticosteroids and, when indicated, an immunosuppressant, is mandatory, which usually leads to the rapid disappearance of cutaneous lesions. Conversely, when skin lesions are isolated, the diagnosis can be more challenging, but initial treatment may be less aggressive, e.g., dapsone or colchicine, reserving corticosteroids only for those patients in whom the former are ineffective. Erythema nodosum (EN) is the most frequent septal panniculitis. In general it is characterized by the sudden eruption of one or more erythematous and tender nodules or plaques located mainly over the extensor sides of lower extremities. EN resolves with complete "restitutio ad integrum" of the skin in 3-6 weeks. Relapses are uncommon but in patients with idiophatic, streptococcal or EN associated with other upper respiratory tract infections they are more frequent. The main treatment of EN is that of the underlying associated conditions, if demonstrated. Aspirin and other NSAIDs in full doses are often sufficient.


Asunto(s)
Eritema Nudoso/complicaciones , Enfermedades de la Piel/etiología , Vasculitis/complicaciones , Crioglobulinemia/etiología , Humanos , Vasculitis por IgA/etiología , Enfermedades de la Piel/tratamiento farmacológico
10.
Reumatismo ; 58(4): 301-9, 2006.
Artículo en Italiano | MEDLINE | ID: mdl-17216019

RESUMEN

The recommendations for the management of osteoarthritis (OA) of the hip were proposed by EULAR in 2005. Among the most important objectives of the expert charged to provide these recommendations were their wide dissemination and implementation. Thus, the information generated can be used by each individual country to produce their own set of management guidelines and algorithms for treatment in primary care. According with that previously executed for the EU-LAR recommendation 2003 for the knee, the Italian Society of Rheumatology (SIR) has organised a Consensus on the EULAR recommendations 2005 for the management of hip OA. To obtain an acceptability as large as possible, the group of experts was composed by many physicians interested in the management of hip OA, including Orthopaedics, Rheumatologists, Physiatrists, and General Practitioners. Main aim of the Consensus was to analyse the acceptability and applicability of the recommendations according to own experience and local situations in the Italy. The results of this Consensus have demonstrated that a large majority of the EULAR recommendations are endorsed by the Italian experts. Furthermore, the final document of the Italian Consensus clearly indicated the need that the specialists involved in the management of hip OA strongly encourage the dissemination of the EULAR 2005 recommendations also in Italy.


Asunto(s)
Osteoartritis de la Cadera/terapia , Guías de Práctica Clínica como Asunto , Atención Primaria de Salud/organización & administración , Unión Europea , Humanos , Italia , Sociedades Médicas
11.
Biofabrication ; 8(1): 015020, 2016 Mar 24.
Artículo en Inglés | MEDLINE | ID: mdl-27011300

RESUMEN

Cell therapy represents a promising option for revascularization of ischemic tissues. However, injection of dispersed cells is not optimal to ensure precise homing into the recipient's vasculature. Implantation of cell-engineered scaffolds around the occluded artery may obviate these limitations. Here, we employed the synthetic polymer polycaprolactone for fabrication of 3D woodpile- or channel-shaped scaffolds by a computer-assisted writing system (pressure assisted micro-syringe square), followed by deposition of gelatin (GL) nanofibers by electro-spinning. Scaffolds were then cross-linked with natural (genipin, GP) or synthetic (3-glycidyloxy-propyl-trimethoxy-silane, GPTMS) agents to improve mechanical properties and durability in vivo. The composite scaffolds were next fixed by crown inserts in each well of a multi-well plate and seeded with adventitial progenitor cells (APCs, 3 cell lines in duplicate), which were isolated/expanded from human saphenous vein surgical leftovers. Cell density, alignment, proliferation and viability were assessed 1 week later. Data from in vitro assays showed channel-shaped/GPTMS-crosslinked scaffolds confer APCs with best alignment and survival/growth characteristics. Based on these results, channel-shaped/GPTMS-crosslinked scaffolds with or without APCs were implanted around the femoral artery of mice with unilateral limb ischemia. Perivascular implantation of scaffolds accelerated limb blood flow recovery, as assessed by laser Doppler or fluorescent microspheres, and increased arterial collaterals around the femoral artery and in limb muscles compared with non-implanted controls. Blood flow recovery and perivascular arteriogenesis were additionally incremented by APC-engineered scaffolds. In conclusion, perivascular application of human APC-engineered scaffolds may represent a novel option for targeted delivery of therapeutic cells in patients with critical limb ischemia.


Asunto(s)
Arteriopatías Oclusivas/terapia , Arterias/crecimiento & desarrollo , Enfermedad Arterial Periférica/patología , Enfermedad Arterial Periférica/terapia , Trasplante de Células Madre/instrumentación , Andamios del Tejido , Adventicia/citología , Animales , Arteriopatías Oclusivas/patología , Arterias/patología , Células Cultivadas , Diseño de Equipo , Análisis de Falla de Equipo , Humanos , Ratones , Neovascularización Fisiológica/fisiología , Implantación de Prótesis/instrumentación , Ingeniería de Tejidos/instrumentación , Ingeniería de Tejidos/métodos , Resultado del Tratamiento
12.
Aliment Pharmacol Ther ; 22(5): 453-61, 2005 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-16128684

RESUMEN

BACKGROUND: The potential clinical implications of autoimmunity during treatment with infliximab are unclear. AIM: To determine the frequency and correlation of autoantibody formation in patients with Crohn's disease treated with infliximab in a routine clinical setting. METHODS: Sixty-three patients with refractory/inflammatory (31) and/or fistulising Crohn's disease (32), received an infliximab infusion at a dose 5 mg/kg in weeks 0, 2 and 6, and were evaluated for the development of antinuclear, anti-double-stranded DNA, anti-Sm, anti-RNP, anti-SSA, anti-SSB and antihistone antibodies. The correlates with pharmacological treatments, the response to infliximab and adverse events were evaluated. RESULTS: Antinuclear antibodies were found in five of the 63 patients (8%) at baseline and in 26 (42%) after 10 weeks (P < 0.001). Of the 26 antinuclear antibody-positive patients who were further subtyped, nine of 63 (17%) had anti-double-stranded DNA (P = 0.003), and 1.5% were extractable nuclear antigen (ENA) and antihistone-positive. Five patients were initially positive for anticardiolipin antibodies and two more patients became positive during infliximab treatment. New autoantibody formation was more frequent in the patients with inflammatory/refractory disease than in those with fistulising disease (17 vs. 7; P = 0.02). One patient developed drug-induced lupus without major organ damage. CONCLUSIONS: Autoantibody formation occurs in 42% of patients (8% of these patients were positive before infliximab treatment) with Crohn's disease receiving induction treatment with infliximab, but the clinical significance of this remains to be determined.


Asunto(s)
Anticuerpos Monoclonales/uso terapéutico , Autoanticuerpos/análisis , Enfermedad de Crohn/tratamiento farmacológico , Fármacos Gastrointestinales/uso terapéutico , Adolescente , Adulto , Anciano , Anticuerpos Monoclonales/efectos adversos , Estudios de Cohortes , Enfermedad de Crohn/inmunología , Resistencia a Medicamentos , Femenino , Fármacos Gastrointestinales/efectos adversos , Humanos , Infliximab , Masculino , Persona de Mediana Edad , Estudios Prospectivos
13.
Dent Mater ; 31(8): e151-6, 2015 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-26008238

RESUMEN

OBJECTIVE: Chipping and/or delamination represent a clinical failure of porcelain fused to zirconia (PFZ) prostheses. Causes and solutions have not been completely clarified. The present study was aimed at evaluating the effects of number of firings on the flexural strength of PFZ specimen. METHODS: Forty-five zirconia specimens in shape of bars were cut, sintered and divided in 3 groups (n=15). Group 1: veneering ceramic was layered "in bulk" and fired. Group 2: veneering ceramic was layered in three layers, individually fired. Group 3: veneering ceramic was layered in five layers, individually fired. Each layer thickness was controlled by the use of calibrated molds. The total veneering ceramic thickness for all the specimens was 1.2mm, and the total thickness of the specimen of 2.0mm. Three-point bending test was performed. Fracture load was recorded in Newton and MPa value was calculated taking into account the bi-layered nature of the specimen. Data were statistically analyzed. RESULTS: Specimens obtained with on single firing cycle obtained a statistically significant (p<0.001) lower flexural strength (54.61±8.98MPa) than specimens veneered with 3 or 5 firing cycles. The last two obtained very similar results (77.63±13.17MPa and 73.62±12.38MPa respectively) and the differences was not statistically significant. SIGNIFICANCE: In bi-layered PFZ specimen, three to five layers and firings determine higher flexural resistance when compared to a single firing. Thus, a 3-layers veneering procedure is recommended to increase flexural resistance. If a 5-layer procedure is necessary to improve esthetics, it does not decrease flexural resistance.


Asunto(s)
Porcelana Dental/química , Coronas con Frente Estético , Circonio/química , Recubrimiento Dental Adhesivo , Materiales Dentales/química , Análisis del Estrés Dental , Calor , Ensayo de Materiales , Docilidad , Estrés Mecánico , Propiedades de Superficie
14.
Leukemia ; 29(5): 1143-52, 2015 May.
Artículo en Inglés | MEDLINE | ID: mdl-25371177

RESUMEN

Genomic loss of the mismatched human leukocyte antigen (HLA) is a recently described mechanism of leukemia immune escape and relapse after allogeneic hematopoietic stem cell transplantation (HSCT). Here we first evaluated its incidence, risk factors and outcome in 233 consecutive transplants from partially HLA-mismatched related and unrelated donors (MMRD and MMUD, respectively). We documented 84 relapses, 23 of which with HLA loss. All the HLA loss relapses occurred after MMRD HSCT, and 20/23 in patients with acute myeloid leukemia. Upon MMRD HSCT, HLA loss variants accounted for 33% of the relapses (23/69), occurring later than their 'classical' counterparts (median: 307 vs 88 days, P<0.0001). Active disease at HSCT increased the risk of HLA loss (hazard ratio (HR): 10.16; confidence interval (CI): 2.65-38.92; P=0.001), whereas older patient ages had a protective role (HR: 0.16; CI: 0.05-0.46; P=0.001). A weaker association with HLA loss was observed for graft T-cell dose and occurrence of chronic graft-versus-host disease. Outcome after 'classical' and HLA loss relapses was similarly poor, and second transplantation from a different donor appeared to provide a slight advantage for survival. In conclusion, HLA loss is a frequent mechanism of evasion from T-cell alloreactivity and relapse in patients with myeloid malignancies transplanted from MMRDs, warranting routine screening in this transplantation setting.


Asunto(s)
Antígenos HLA/inmunología , Trasplante de Células Madre Hematopoyéticas/métodos , Leucemia Mieloide Aguda/inmunología , Leucemia Mieloide Aguda/terapia , Adolescente , Adulto , Anciano , Femenino , Enfermedad Injerto contra Huésped/inmunología , Prueba de Histocompatibilidad , Humanos , Incidencia , Leucemia Mieloide Aguda/epidemiología , Masculino , Persona de Mediana Edad , Mutación , Modelos de Riesgos Proporcionales , Recurrencia , Estudios Retrospectivos , Factores de Riesgo , Adulto Joven
15.
Leukemia ; 29(2): 396-405, 2015 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-24897508

RESUMEN

Hematopoietic stem cell transplantation (HSCT) from human leukocyte antigen (HLA) haploidentical family donors is a promising therapeutic option for high-risk hematologic malignancies. Here we explored in 121 patients, mostly with advanced stage diseases, a sirolimus-based, calcineurin-inhibitor-free prophylaxis of graft-versus-host disease (GvHD) to allow the infusion of unmanipulated peripheral blood stem cell (PBSC) grafts from partially HLA-matched family donors (TrRaMM study, Eudract 2007-5477-54). Conditioning regimen was based on treosulfan and fludarabine, and GvHD prophylaxis on antithymocyte globulin Fresenius (ATG-F), rituximab and oral administration of sirolimus and mycophenolate. Neutrophil and platelet engraftment occurred in median at 17 and 19 days after HSCT, respectively, and full donor chimerism was documented in patients' bone marrow since the first post-transplant evaluation. T-cell immune reconstitution was rapid, and high frequencies of circulating functional T-regulatory cells (Treg) were documented during sirolimus prophylaxis. Incidence of acute GvHD grade II-IV was 35%, and occurrence and severity correlated negatively with Treg frequency. Chronic GvHD incidence was 47%. At 3 years after HSCT, transpant-related mortality was 31%, relapse incidence 48% and overall survival 25%. In conclusion, GvHD prophylaxis with sirolimus-mycophenolate-ATG-F-rituximab promotes a rapid immune reconstitution skewed toward Tregs, allowing the infusion of unmanipulated haploidentical PBSC grafts.


Asunto(s)
Enfermedad Injerto contra Huésped/inmunología , Enfermedad Injerto contra Huésped/prevención & control , Antígenos HLA/inmunología , Trasplante de Células Madre de Sangre Periférica , Sirolimus/uso terapéutico , Linfocitos T Reguladores/inmunología , Administración Oral , Adolescente , Adulto , Anciano , Anticuerpos Monoclonales de Origen Murino/uso terapéutico , Suero Antilinfocítico/uso terapéutico , Plaquetas/citología , Busulfano/análogos & derivados , Busulfano/uso terapéutico , Niño , Femenino , Humanos , Inmunosupresores/uso terapéutico , Masculino , Persona de Mediana Edad , Ácido Micofenólico/análogos & derivados , Ácido Micofenólico/uso terapéutico , Neutrófilos/citología , Estudios Prospectivos , Rituximab , Linfocitos T/inmunología , Donantes de Tejidos , Acondicionamiento Pretrasplante , Resultado del Tratamiento , Vidarabina/análogos & derivados , Vidarabina/uso terapéutico , Adulto Joven
16.
Immunol Lett ; 74(1): 41-4, 2000 Sep 15.
Artículo en Inglés | MEDLINE | ID: mdl-10996626

RESUMEN

Cytokines are crucial factors in the activation and development of immune response, including responses against tumor cells. Interleukin (IL)-2, a T-cell growth factor, has been largely used to activate T and NK cells in vivo and to maintain such an activation for therapeutic purposes. When given to patients, IL-2 was shown to cause clinical responses, especially in metastatic melanoma and renal cancer patients, though its mechanism of action could not be completely elucidated. Cytokines (IL-2, IL-12, GM-CSF) are also used as natural adjuvants of vaccines of various formulation to help in activating and maintaining an antitumor immune response. This review summarizes findings deriving from the use of cytokines in cancer therapy and provides insights into future approaches when a more appropriate use of cytokines, together with new vaccines, is likely to improve clinical outcome.


Asunto(s)
Adyuvantes Inmunológicos , Vacunas contra el Cáncer/inmunología , Citocinas/inmunología , Citocinas/uso terapéutico , Neoplasias/tratamiento farmacológico , Neoplasias/inmunología , Animales , Vacunas contra el Cáncer/uso terapéutico , Quimioterapia Adyuvante , Ensayos Clínicos como Asunto , Humanos , Inmunoterapia Activa , Neoplasias/terapia
17.
Leuk Lymphoma ; 41(1-2): 147-50, 2001 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-11342366

RESUMEN

Hyperhomocysteinemia (HH) has been associated with cardiovascular and autoimmune diseases and oxidative cell damage. Myelodysplastic syndromes (MDS) are associated with autoimmunity (AI) and increased oxidative stress. We tested the association of HH and oxidative stress in 33 MDS patients, by measuring plasma homocysteine and malondialdehyde (MDA). HH was found in 42% of cases, (4/5) cases with associated cardiovascular events (CVE)(80%), and 9/15 cases with associated AI (60%). Thus in MDS, HH was significantly associated with AI/CVE (chi(2) : p=0.0011), and this association seems to be specific, as demonstrated by the comparison of MDS presenting AI/CVE with the ischemic cardiopathy/rheumatoid arthritis control group (13/20, 65% vs 19/69, 27%; chi(2) : p=0.0021). The levels of MDA indicated increased oxidative stress. Our data may suggest that in a subset of MDS, HH may simultaneously contribute to bone marrow myelodysplasia, CVE and AI pathogenesis, possibly through oxidative cell damage.


Asunto(s)
Hiperhomocisteinemia/complicaciones , Síndromes Mielodisplásicos/complicaciones , Análisis de Varianza , Autoinmunidad/fisiología , Enfermedades Cardiovasculares/sangre , Enfermedades Cardiovasculares/etiología , Estudios de Casos y Controles , Ayuno , Homocisteína/sangre , Humanos , Peroxidación de Lípido , Malondialdehído/sangre , Síndromes Mielodisplásicos/sangre , Síndromes Mielodisplásicos/inmunología , Estrés Oxidativo/fisiología
18.
Curr Med Res Opin ; 13(6): 343-55, 1995.
Artículo en Inglés | MEDLINE | ID: mdl-8829892

RESUMEN

The local tolerability, safety and efficacy of meloxicam 15 mg suppositories were compared with piroxicam 20 mg suppositories over a 3-week period in a single-blind, randomized study in patients with osteoarthritis. Patients were randomized 2:1 to receive meloxicam (n = 216) or piroxicam (n = 109). More than 90% of patients and investigators assessed local tolerability of both treatments as good or very good (primary endpoint). There was no significant difference between the groups. Global efficacy was reported by approximately 80% of patients in both groups to be good or very good. Pain on movement and at rest and joint mobility showed statistically significant improvements compared with baseline with both meloxicam and piroxicam; there were no statistically significant differences between treatment groups. Piroxicam and meloxicam suppositories were equally well tolerated, with no serious adverse events recorded in either treatment group. Local adverse events occurred in 11.9% of patients receiving piroxicam and 6.9% of those receiving meloxicam. Overall, gastrointestinal adverse events were the most frequent of all 11.9% of piroxicam-treated patients). In both groups, about 90% of global tolerability assessments were classified, by the investigator and the patient, as either very good or good. In conclusion, meloxicam 15 mg suppositories showed excellent local tolerability accompanied by good safety and efficacy in osteoarthritis, which was comparable to that of an established non-steroidal anti-inflammatory drug (NSAID) administered by the rectal route, and to that previously observed with oral formulations of meloxicam 15 mg.


Asunto(s)
Osteoartritis/tratamiento farmacológico , Piroxicam/administración & dosificación , Tiazinas/administración & dosificación , Tiazoles/administración & dosificación , Adulto , Anciano , Anciano de 80 o más Años , Relación Dosis-Respuesta a Droga , Esquema de Medicación , Tolerancia a Medicamentos , Femenino , Humanos , Masculino , Meloxicam , Persona de Mediana Edad , Piroxicam/efectos adversos , Rango del Movimiento Articular/efectos de los fármacos , Método Simple Ciego , Tiazinas/efectos adversos , Tiazoles/efectos adversos , Resultado del Tratamiento
19.
Clin Exp Rheumatol ; 21(6): 759-62, 2003.
Artículo en Inglés | MEDLINE | ID: mdl-14740456

RESUMEN

We report a patient with longstanding systemic lupus erythematosus (SLE) who developed pure red cell aplasia (PRCA). This condition is rare in connective tissue diseases and is reported in 32 previous cases of SLE in literature. Our patient recovered, apparently in response to treatment with high dosage of corticosteroids, but relapse occurred when the prednisone dosage was tapered down to 10 mg/day. The patient was successfully treated with cyclosporin A with no recurrence of the disease in the last 2 years.


Asunto(s)
Ciclosporina/administración & dosificación , Lupus Eritematoso Sistémico/complicaciones , Lupus Eritematoso Sistémico/tratamiento farmacológico , Aplasia Pura de Células Rojas/complicaciones , Aplasia Pura de Células Rojas/tratamiento farmacológico , Adulto , Relación Dosis-Respuesta a Droga , Esquema de Medicación , Femenino , Estudios de Seguimiento , Humanos , Infusiones Intravenosas , Lupus Eritematoso Sistémico/diagnóstico , Aplasia Pura de Células Rojas/diagnóstico , Medición de Riesgo , Índice de Severidad de la Enfermedad , Resultado del Tratamiento
20.
Clin Exp Rheumatol ; 21(4): 459-64, 2003.
Artículo en Inglés | MEDLINE | ID: mdl-12942697

RESUMEN

OBJECTIVE: To validate a translated Italian version of the Fibromyalgia Impact Questionnaire (FIQ). METHODS: The Italian version of the FIQ was administered to 50 patients affected by fibromyalgia (FM) (48 patients filled out the questionnaire again 10 days later) together with the Italian version of the Stanford Health Assessment Questionnaire (HAQ), the Medical Outcomes Survey Short Form-36 (SF-36), and a tender point count (TPC) obtained by summing the score (0-3) of each tender point tested by thumb palpation. All patients were asked about the severity of pain today (10 cm visual analog scale) and the duration of symptoms. Test-retest reliability was assessed using Spearman correlations. Internal consistency was evaluated with Cronbach's alpha of reliability. Construct validity of the FIQ was evaluated by correlations between the HAQ and subscales of the SF-36 as well as the TPC. RESULTS: The mean duration of symptoms was 6.5 years and the mean age of the participants was 57.4 years. Test-retest reliability was between 0.74 and 0.95 for physical functioning as well as for the total FIQ and other components. Internal consistency was 0.90 for the overall FIQ. Significant correlations were obtained between the FIQ items, the HAQ and the SF-36. CONCLUSIONS: The Italian FIQ is a reliable and valid instrument for detecting and measuring functional disability and health status in Italian patients with FM.


Asunto(s)
Actividades Cotidianas , Fibromialgia/diagnóstico , Calidad de Vida , Perfil de Impacto de Enfermedad , Encuestas y Cuestionarios , Adulto , Anciano , Evaluación de la Discapacidad , Femenino , Fibromialgia/epidemiología , Humanos , Italia , Masculino , Persona de Mediana Edad , Reproducibilidad de los Resultados , Sensibilidad y Especificidad , Índice de Severidad de la Enfermedad , Traducciones
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