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INTRODUCTION: The prognosis of diffuse large B-cell lymphoma (DLBCL) patients with refractory or multiply relapsed (R/R) disease is disappointing. Pixantrone is currently approved as third or fourth line regimen, with encouraging results, even if long-term follow-up data are limited. METHODS: In this post-hoc analysis of our observational study, we retrospectively investigated disease outcome and clinical characteristics of 16 R/R DLBCL patients who achieved a complete response with pixantrone. RESULTS: Pixantrone was administered as third or fourth line in 12/16 (75%) and 4/16 (25%) cases. After a median follow-up of 24 months, 14/16 patients (87.5%) were alive (causes of death were progressive disease and secondary acute myeloid leukemia, one case each). Median progression-free survival was 23.8 months, median duration of response was 17.8 months and median overall survival (OS) was not reached (2-years OS was 84%). A significant proportion of patients achieved a long-lasting response >12 months (7/16 cases). Response to prior therapy did not influence long-term remission after pixantrone. CONCLUSION: In this real-life experience, pixantrone demonstrated long-term efficacy in a cohort of R/R DLBCL cases who had previously received at least two prior regimens; many of whom had characteristics associated with poor prognosis.
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Linfoma de Células B Grandes Difuso , Linfoma no Hodgkin , Humanos , Estudios Retrospectivos , Linfoma no Hodgkin/tratamiento farmacológico , Linfoma de Células B Grandes Difuso/diagnóstico , Linfoma de Células B Grandes Difuso/tratamiento farmacológico , Linfoma de Células B Grandes Difuso/etiología , Isoquinolinas/uso terapéutico , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversosRESUMEN
Phytoplasmas are obligate, phloem-restricted phytopathogens that are disseminated by phloem-sap-sucking insects. Phytoplasma infection severely impairs assimilate translocation in host plants and might be responsible for massive changes in phloem physiology. Methods to study phytoplasma- induced changes thus far provoked massive, native occlusion artifacts in sieve tubes. Hence, phytoplasma-phloem relationships were investigated here in intact Vicia faba host plants using a set of vital fluorescent probes and confocal laser-scanning microscopy. We focused on the effects of phytoplasma infection on phloem mass-flow performance and evaluated whether phytoplasmas induce sieve-plate occlusion. Apparently, phytoplasma infection brings about Ca(2+) influx into sieve tubes, leading to sieve-plate occlusion by callose deposition or protein plugging. In addition, Ca(2+) influx may confer cell wall thickening of conducting elements. In conclusion, phytoplasma effectors may cause gating of sieve-element Ca(2+) channels leading to sieve-tube occlusion with presumptive dramatic effects on phytoplasma spread and photoassimilate distribution.
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Calcio/metabolismo , Floema/metabolismo , Floema/microbiología , Phytoplasma/patogenicidad , Vicia faba/metabolismo , Vicia faba/microbiología , Microscopía ConfocalRESUMEN
Bois Noir is an emergent disease of grapevine that has been associated to a phytoplasma belonging to the XII-A stolbur group. In plants, phytoplasmas have been found mainly in phloem sieve elements, from where they spread moving through the pores of plates, accumulating especially in source leaves. To examine the expression of grapevine genes involved in sucrose transport and metabolism, phloem tissue, including sieve element/companion cell complexes and some parenchyma cells, was isolated from healthy and infected leaves by means of laser microdissection pressure catapulting (LMPC). Site-specific expression analysis dramatically increased sensitivity, allowing us to identify specific process components almost completely masked in whole-leaf analysis. Our findings showed decreased phloem loading through inhibition of sucrose transport and increased sucrose cleavage activity, which are metabolic changes strongly suggesting the establishment of a phytoplasma-induced switch from carbohydrate source to sink. The analysis focused at the infection site also showed a differential regulation and specificity of two pathogenesis-related thaumatin-like genes (TL4 and TL5) of the PR-5 family.
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Microdisección , Floema/microbiología , Phytoplasma/fisiología , Hojas de la Planta/microbiología , Sacarosa/metabolismo , Vitis/genética , Vitis/microbiología , Transporte Biológico/genética , Perfilación de la Expresión Génica , Regulación de la Expresión Génica de las Plantas , Rayos Láser , Floema/citología , Floema/genética , ARN de Planta/genética , ARN de Planta/metabolismo , Vitis/citología , Vitis/metabolismoRESUMEN
Phloem and xylem tissues are necessary for the allocation of nutrients and photoassimilates. However, how the long-distance transport of carbon (C) and nitrogen (N) is coordinated with the central metabolism is largely unknown. To better understand how the genetic and environmental factors influence C and N transport, we analysed the metabolite profiles of phloem exudates and xylem saps of five Arabidopsis thaliana accessions grown in low or non-limiting N supply. We observed that xylem saps were composed of 46 or 56% carbohydrates, 27 or 45% amino acids, and 5 or 13% organic acids in low or non-limiting N supply, respectively. In contrast, phloem exudates were composed of 76 or 86% carbohydrates, 7 or 18% amino acids, and 5 or 6% organic acids. Variation in N supply impacted amino acid, organic acid and sugar contents. When comparing low N and non-limiting N, the most striking differences were variations of glutamine, aspartate, and succinate abundance in the xylem saps and citrate and fumarate abundance in phloem exudates. In addition, we observed a substantial variation of metabolite content between genotypes, particularly under high N. The content of several organic acids, such as malate, citrate, fumarate, and succinate was affected by the genotype alone or by the interaction between genotype and N supply. This study confirmed that the response of the transport of nutrients in the phloem and the xylem to N availability is associated with the regulation of the central metabolism and could be an adaptive trait.
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Arabidopsis , Floema , Aminoácidos/metabolismo , Arabidopsis/metabolismo , Transporte Biológico , Carbohidratos/análisis , Citratos/análisis , Citratos/metabolismo , Fumaratos/análisis , Fumaratos/metabolismo , Nutrientes , Floema/metabolismo , Succinatos/análisis , Succinatos/metabolismo , Xilema/metabolismoRESUMEN
INTRODUCTION: The aim of this study was to evaluate the effects of a low-dose exposure to nickel, as it is present in urban air, on thyroid hormones and on thyrotropin in outdoor workers exposed to urban pollutants. MATERIALS AND METHODS: A total of 164 outdoor workers were studied and divided by sex and smoking habit. Each worker underwent measurement of urinary nickel and of blood triiodothyronine, L-thyroxine, and thyrotropin levels. The statistical analysis was performed. RESULTS: Statistical analysis shows a significant and positive correlation between urinary nickel and L-thyroxine, both in total sample and in males. DISCUSSION AND CONCLUSION: The study suggests that occupational exposure to a low dose of nickel may affect thyroid function in municipal police workers. These data may provide information on other categories of outdoor workers with similar exposure.
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Exposición Profesional , Tiroxina , Masculino , Humanos , Níquel/orina , Policia , Exposición Profesional/efectos adversos , Exposición Profesional/análisis , Tirotropina , Hormonas TiroideasRESUMEN
OBJECTIVE: The aim of this study is to evaluate whether the exposure to a low dose of nickel could determinate a variation in levels of progesterone in outdoor workers. MATERIALS AND METHODS: Two hundred sixty one subjects were divided by sex, task, age, seniority, and cigarette smoking habit. For each workers was evaluated the dose of blood progesterone and urinary nickel.The statistical analysis was performed. RESULTS: The Pearson correlation showed a statistically significant correlation between urinary nickel levels and progesterone. The multiple linear regression showed a significant correlation between progesterone and urinary nickel in the total sample and in the subgroups of smokers and workers with tasks of traffic direction. CONCLUSIONS: The results of our study suggest that occupational exposure to low doses of nickel present in urban pollution may influence to progesterone levels in outdoor workers.
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Contaminantes Atmosféricos , Contaminantes Ambientales , Exposición Profesional , Contaminantes Atmosféricos/análisis , Humanos , Níquel , Exposición Profesional/efectos adversos , Exposición Profesional/análisis , Policia , ProgesteronaRESUMEN
Thousands of sieve tube exudate proteins (STEP) have now been identified and predicted to fulfill a diversity of functions. However, most STEPs should be considered putative, since methods to collect sieve tube exudates have many technical drawbacks, and advanced functional characterization will be required to distinguish contaminant from bonafide proteins, and determine the latter's location and activity in sieve elements (SE). One major challenge is to develop new approaches to elucidate the function of these SE proteins, which in turn, is expected to shed light on intriguing aspects of SE cell biology.
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Floema/metabolismo , Proteínas de Plantas/metabolismo , Plantas/metabolismo , Modelos BiológicosRESUMEN
In our systematic research we identified four studies concerning the onset of neurological adverse events following vaccination and two excluding this association. A 33-year-old Italian man, belonging to the Italian Army was hospitalized because he suffered from vertigo, nausea and sudden right hearing loss not classified (NDD), that set in 24 h after the administration of tetanus-diphtheria and meningococcal vaccines. Some neurological events arising after vaccination are very difficult to treat. In our case, the functional recovery on low and medium frequencies was possible about 6 months after the morbid event.
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Vacuna contra Difteria y Tétanos/efectos adversos , Pérdida Auditiva Sensorineural/etiología , Pérdida Auditiva Súbita/etiología , Vacunas Meningococicas/efectos adversos , Vacunación/efectos adversos , Adulto , Humanos , MasculinoRESUMEN
OBJECTIVE: Nonlymphoma-associated bcl-2/IgH rearrangements (NLABRs) are frequently amplified by PCR in blood of lymphoma-free subjects (LFS), but the temporal kinetics and phenotypic nature of NLABR-positive cells are unknown. To address these issues we prospectively monitored a panel of NLABR-positive LFS. METHODS: LFS have been studied by nested PCR, real-time PCR, and DNA sequencing. Cell selection studies were also performed to define the nature of NLABR-bearing clones. RESULTS: Of 125 donors, 16 (12.8%) were found to be bcl-2/IgH positive and were monitored at least every 6 months for a median time of 22 months (range 6-50). In half of the subjects the same NLABR detected initially was again reamplified at follow-up thrice or more. In 5, the same NLABR was constantly amplified in every follow-up sample. With a median follow-up of 22 months (range 9-50), no stable disappearance of a recurrent clone has been so far recorded. Real-time PCR indicated that persistent NLABR-positive clones are stable over time in the same subject. Cell separation studies indicate that NLABRs belong to CD19+, CD5-, CD23-, CD10+/- cells. CONCLUSIONS: Our results indicate that NLABR-positive clones are persistent populations phenotypically related to follicular lymphoma (FL). This suggests the existence of a FL-related clonal expansion of undetermined significance, which might be either a premalignant or a nonmalignant counterpart of FL.
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Cadenas Pesadas de Inmunoglobulina/genética , Leucocitos Mononucleares/metabolismo , Linfoma Folicular/genética , Proteínas Proto-Oncogénicas c-bcl-2/genética , Translocación Genética , Adulto , Anciano , Anciano de 80 o más Años , Separación Celular , Células Clonales , Femenino , Estudios de Seguimiento , Humanos , Cadenas Pesadas de Inmunoglobulina/metabolismo , Inmunofenotipificación , Masculino , Persona de Mediana Edad , Reacción en Cadena de la Polimerasa/métodos , Proteínas Proto-Oncogénicas c-bcl-2/metabolismoRESUMEN
PURPOSE: To evaluate the rate and onset of intraoperative and postoperative complications post-phacoemulsification. METHODS: One hundred sixty-two eyes of 145 patients with uveitis who underwent phacoemulsification between 2006 and 2009 were identified through surgical record review. Fifty-nine eyes of 46 patients met the inclusion criteria. Hazard ratio (HR) and Kaplan-Meier survival probability were calculated for each class of uveitis. RESULTS: Macular edema (ME) resulted to be associated to chronic postoperative inflammation (r = 0.6; p = 0.00) and mostly related to patients who presented more than one postoperative relapse/year (r = 0.2; p = 0.02). Fuchs uveitis resulted to be a risk factor for posterior capsule opacification (PCO) (HR 3.36 IC95%1.0-10.5; p = 0.03). Hypotony and elevated intraocular pressure (IOP) were detected in the anterior uveitis group (0.02 EY). CONCLUSION: The HR to develop ME was significantly related to chronic anterior uveitis. PCO and elevated IOP are most frequent in Fuchs uveitis. The postoperative visual acuity result was good among all the uveitis groups.
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Complicaciones Intraoperatorias , Facoemulsificación/efectos adversos , Complicaciones Posoperatorias , Uveítis/complicaciones , Adulto , Anciano , Anciano de 80 o más Años , Opacificación Capsular/etiología , Femenino , Estudios de Seguimiento , Humanos , Estimación de Kaplan-Meier , Implantación de Lentes Intraoculares , Edema Macular/etiología , Masculino , Persona de Mediana Edad , Hipertensión Ocular/etiología , Modelos de Riesgos Proporcionales , Seudofaquia/fisiopatología , Factores de Riesgo , Agudeza Visual/fisiología , Adulto JovenRESUMEN
AIM: To assess the attitude and practice of contact lens (CL) wearers among teenage school students and to evaluate how much the teenagers adhere to the CL care procedures according to the proper care of CL guidelines. METHODS: A cross-sectional descriptive study of Italian teenagers from high schools in Rome who wear CL. We inquired about the different aspects of CL care through a questionnaire. RESULTS: We investigated 3,106 students from high schools in Rome (2% of all Roman high school students), 293 of whom wore CL (9%); 151 (52%) of participants responded, 42 (27.8%) male and 109 (72.8%) female. The mean age was 16.4 ± 1.6 years. 79.5% of students were daily users. 45.7% wore CL more than nine hours/day. 87.4% wore soft CL. 33.1% wore disposable CL; 7.9% weekly CL, 55% monthly CL. Thirty-four percent wore disposable lenses twice or more. 14.5% of students did not wash their hands before handling CL and 52.3% wore CL after it had fallen in the sink. 39.7% rubbed and cleaned CL before storing it. 10% used expired lens care solutions. Only 31.1% changed CL cases every three months. 38.4% wore CL in a swimming pool. 61.6% were having problems: redness (13.9%), itching (7.9%), and foreign body sensation (29.1%). CONCLUSION: Many students don't properly care for their CL. Education regarding proper care and management of CL among users is advised in view of frequency of symptoms and complications reported.
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Soluciones para Lentes de Contacto/uso terapéutico , Lentes de Contacto , Conductas Relacionadas con la Salud , Conocimientos, Actitudes y Práctica en Salud , Estudiantes/psicología , Adolescente , Estudios Transversales , Femenino , Humanos , Higiene , Italia , Masculino , Cooperación del Paciente , Errores de Refracción/terapia , Encuestas y CuestionariosRESUMEN
Phytoplasmas are among the most recently discovered plant pathogenic microorganisms so, many traits of the interactions with host plants and insect vectors are still unclear and need to be investigated. At now, it is impossible to determine the precise sequences leading to the onset of the relationship with the plant host cell. It is still unclear how phytoplasmas, located in the phloem sieve elements, exploit host cell to draw nutrition for their metabolism, growth and multiplication. In this work, basing on microscopical observations, we give insight about the structural interactions established by phytoplasmas and the sieve element plasma membrane, cytoskeleton, sieve endoplasmic reticulum, speculating about a possible functional role.
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Interacciones Huésped-Patógeno , Phytoplasma/fisiología , Solanum lycopersicum/microbiología , Animales , Adhesión Bacteriana , Membrana Celular/microbiología , Insectos Vectores/microbiología , Solanum lycopersicum/ultraestructura , Microscopía Electrónica de Transmisión , Modelos Biológicos , Phytoplasma/ultraestructura , Enfermedades de las Plantas/microbiologíaRESUMEN
BACKGROUND: Few studies in the literature have examined the effects of benzene on blood cells. AIM: The aim of this study was to evaluate the possible correlation between the blood benzene levels and the blood cell counts. MATERIALS AND METHODS: From a population of 2658 workers, we studied a group of 215 subjects. Each worker underwent blood sampling for the assessment of the blood benzene levels and the blood cell counts. The Mann-Whitney U test for two-mode variables and the Kruskal-Wallis test for more-than-two-mode variables were performed on all subjects. We estimated the Pearson correlation index between the variables in the total sample and the subgroups divided according to sex, the smoking habit, and job. After the main confounding factors were evaluated, multiple linear regression was performed on both the total sample and the subgroups. RESULTS: A significant inverse correlation was found among the blood benzene levels and the white blood cells, lymphocytes, and neutrophils in traffic policemen, motorcyclists, and other outdoor workers. We did not find any significant correlation with any other parameters of blood cell count. DISCUSSION AND CONCLUSIONS: Our results, which must be considered preliminary, indicate that increased blood benzene levels in outdoor workers lead to decreased counts of white blood cells, neutrophils, and lymphocytes, because of possible immune effects. These are worth investigating in the future by specific immune tests.
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Contaminantes Atmosféricos/análisis , Benceno/análisis , Recuento de Células Sanguíneas , Exposición Profesional/análisis , Policia , Adulto , Ciudades , Monitoreo del Ambiente , Femenino , Humanos , Modelos Lineales , Masculino , Persona de Mediana Edad , Fumar/sangre , Salud UrbanaRESUMEN
PURPOSE: To investigate the correlation between best-corrected visual acuity (BCVA), the foveal inner segment/outer segment (IS/OS) junction or ellipsoid portion of inner segment (EPIS/ellipsoid zone), and the cone outer segment tips (COST) line or interdigitation zone integrity in eyes with uveitic macular edema (ME). METHOD: A retrospective observational study involving all patients from January 2012 to December 2013 with uveitic ME was performed. All patients underwent BCVA using Snellen charts spectral-domain optical coherence tomography (SD-OCT) examination using Spectralis OCT (Heidelberg Engineering, Heidelberg, Germany). RESULTS: Fifty-two eyes from 45 patients were included in this study. Multivariate analysis showed a negative correlation between BCVA and the central retinal subfield thickness (CST), the cystoid pattern of edema, and the interdigitation zone interruption. Univariate logistic analysis showed a strong correlation between the ellipsoid zone and the interdigitation zone integrity. CONCLUSIONS: The ellipsoid zone defect, the interdigitation zone interruption, and the CST are correlated with poor vision. Visual acuity is also strongly affected by the cystoid pattern. The interdigitation zone integrity appears to be the most important factor in the visual prognosis of uveitic ME.
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Edema Macular/patología , Segmento Interno de las Células Fotorreceptoras Retinianas/patología , Segmento Externo de las Células Fotorreceptoras Retinianas/patología , Uveítis/patología , Agudeza Visual/fisiología , Adolescente , Adulto , Anciano , Niño , Femenino , Humanos , Edema Macular/epidemiología , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Uveítis/epidemiología , Adulto JovenRESUMEN
Phytoplasmas, biotrophic wall-less prokaryotes, only reside in sieve elements of their host plants. The essentials of the intimate interaction between phytoplasmas and their hosts are poorly understood, which calls for research on potential ultrastructural modifications. We investigated modifications of the sieve-element ultrastructure induced in tomato plants by 'Candidatus Phytoplasma solani,' the pathogen associated with the stolbur disease. Phytoplasma infection induces a drastic re-organization of sieve-element substructures including changes in plasma membrane surface and distortion of the sieve-element reticulum. Observations of healthy and stolbur-diseased plants provided evidence for the emergence of structural links between sieve-element plasma membrane and phytoplasmas. One-sided actin aggregates on the phytoplasma surface also inferred a connection between phytoplasma and sieve-element cytoskeleton. Actin filaments displaced from the sieve-element mictoplasm to the surface of the phytoplasmas in infected sieve elements. Western blot analysis revealed a decrease of actin and an increase of ER-resident chaperone luminal binding protein (BiP) in midribs of phytoplasma-infected plants. Collectively, the studies provided novel insights into ultrastructural responses of host sieve elements to phloem-restricted prokaryotes.
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Grapevine can be severely affected by phytoplasmas, which are phytopathogenic Mollicutes invading the sieve elements of the host plant. The biochemical and molecular relationships between phytoplasmas and their hosts remain largely unexplored. Equally unknown is an interesting aspect of the pathogen-plant interaction called "recovery," which is a spontaneous remission of symptoms in previously symptomatic plants. Recovered plants develop resistance mechanisms correlated with ultrastructural and biochemical changes in the sieve elements. Callose as well as sugars are involved in several plant defense processes and signaling. In the present work we have examined the possible involvement of callose, as well as callose synthase, sugar transporter, and cell wall invertase genes, during the infection and after "recovery" of grapevine from bois noir (BN). Ultrastructural investigation of leaf tissue showed that callose accumulated in the sieve elements of diseased grapevine; moreover, two genes encoding for callose synthase were up-regulated in the infected leaves. Regarding sucrose, expression analysis showed that sucrose transport and cleavage were severely affected by BN phytoplasma, which induced the establishment of a carbohydrate sink in the source leaf, and was analogous to other obligate biotrophs that acquire most of their nutrients from the host plant. Interestingly, whereas in recovered plants the transcript level of sucrose synthase was similar to healthy plants, sucrose transporters as well as cell wall invertase were expressed to a greater degree in recovered leaves than in healthy ones. Recovered plants seem to acquire structural and molecular changes leading to increases in sucrose transport ability and defense signaling.
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BACKGROUND: Caloric restriction in obese diabetic patients quickly improves glucose control, independently from weight loss. However, the early effects of a very-low-calorie diet (VLCD) on insulin sensitivity and insulin secretion in morbidly obese patients with type 2 diabetes are still unclear. OBJECTIVE: The objective was to study the relative contributions of insulin sensitivity, insulin secretion, or both to improvement in glucose metabolism, after 1 wk of caloric restriction, in severely obese diabetic patients. DESIGN: Hyperglycemic clamps were performed in 14 severely obese (BMI, in kg/m(2): >40) patients with type 2 diabetes in good glucose control (glycated hemoglobin < 7.5%) before and after 7 d of a VLCD (400 kcal/d). RESULTS: The VLCD caused a 3.22 ± 0.56% weight loss (P < 0.001), 42.0% of which was fat loss, accompanied by decreases in fasting plasma glucose (P < 0.05) and triglycerides (P < 0.01). In parallel, the Disposition Index, which measures the body's capability to dispose of a glucose load, increased from 59.0 ± 6.3 to 75.5 ± 6.3 mL· min(-1) · m(-2) body surface area (P < 0.01), because of improvements in indexes of both first- and second-phase insulin secretion (P < 0.02), but with no changes in insulin sensitivity (P = 0.33). CONCLUSION: The marked improvement in metabolic profile, observed in severely obese patients with type 2 diabetes after a 7-d VLCD, was primarily due to the amelioration of ß cell function, whereas no contribution of insulin sensitivity was shown. This trial was registered at www.clinicaltrials.gov as NCT01447524.
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Restricción Calórica , Diabetes Mellitus Tipo 2/dietoterapia , Células Secretoras de Insulina/metabolismo , Obesidad Mórbida/dietoterapia , Administración Oral , Glucemia/análisis , Índice de Masa Corporal , Colesterol/sangre , Creatinina/sangre , Diabetes Mellitus Tipo 2/complicaciones , Diabetes Mellitus Tipo 2/fisiopatología , Ingestión de Energía , Femenino , Humanos , Hipoglucemiantes/administración & dosificación , Insulina/sangre , Insulina/metabolismo , Resistencia a la Insulina , Secreción de Insulina , Masculino , Persona de Mediana Edad , Obesidad Mórbida/complicaciones , Obesidad Mórbida/fisiopatología , Triglicéridos/sangre , Pérdida de PesoAsunto(s)
Proteínas de Arabidopsis/fisiología , Arabidopsis/fisiología , Proteínas de Transporte de Membrana/fisiología , Adaptación Fisiológica , Arabidopsis/crecimiento & desarrollo , Arabidopsis/metabolismo , Proteínas de Arabidopsis/genética , Carbohidratos , Pared Celular/metabolismo , Congelación , Proteínas de Transporte de Membrana/genética , Floema/metabolismo , Xilema/metabolismoRESUMEN
In this randomized multicenter study of 136 patients, 6 courses of CHOP (cyclo-phosphamide/doxorubicin/vincristine/prednisone) followed by rituximab (CHOP-R) were compared with rituximab-supplemented high-dose sequential chemotherapy with autografting (R-HDS) to assess the value of intensified chemo-therapy as a first-line treatment for high-risk follicular lymphoma (FL) after the introduction of monoclonal antibodies. The analysis was intention to treat with event-free survival (EFS) as the primary endpoint. Complete remission (CR) was 62% with CHOP-R and 85% with R-HDS (P < .001). At a median follow-up (MFU) of 51 months, the 4-year EFS was 28% and 61%, respectively (P < .001), with no difference in overall survival (OS). Molecular remission (MR) was achieved in 44% of CHOP-R and 80% of R-HDS patients (P < .001), and was the strongest independent outcome predictor. Patients relapsing after CHOP-R underwent salvage R-HDS in 71% of cases. Salvage R-HDS had an 85% CR rate and a 68% 3-year EFS (MFU, 30 months). We conclude that (1) achieving MR is critical for effective disease control, regardless of which treatment is used; (2) R-HDS ensures superior disease control and molecular outcome than CHOP-R, but no OS improvement; and (3) CHOP-R failures have a good outcome after salvage R-HDS, suggesting that relapsed/refractory FL could be the most appropriate setting for R-HDS-like treatments. This trial was registered at www.clinicaltrials.gov as no. NCT00435955.
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Anticuerpos Monoclonales/administración & dosificación , Anticuerpos Monoclonales/uso terapéutico , Protocolos de Quimioterapia Combinada Antineoplásica/administración & dosificación , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Linfoma Folicular/diagnóstico , Linfoma Folicular/tratamiento farmacológico , Adolescente , Adulto , Anticuerpos Monoclonales/efectos adversos , Anticuerpos Monoclonales de Origen Murino , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Estudios de Factibilidad , Femenino , Humanos , Inmunoterapia , Estimación de Kaplan-Meier , Masculino , Persona de Mediana Edad , Modelos de Riesgos Proporcionales , Estudios Prospectivos , Factores de Riesgo , Rituximab , Terapia Recuperativa , Análisis de Supervivencia , Trasplante Autólogo , Insuficiencia del Tratamiento , Resultado del TratamientoRESUMEN
Molecular remission (MR) is associated with improved outcome in mantle cell lymphoma (MCL). If MR is not achieved, patients are at high risk of relapse. We retrospectively describe the molecular and clinical follow-ups of 4 patients with molecular relapses (M-rels) who were treated with rituximab. The 4 patients received rituximab-supplemented, high-dose sequential chemotherapy and autologous stem cell transplantation as induction treatment and achieved clinical remission and MR. M-rel was defined as polymerase chain reaction (PCR) positivity in 2 consecutive samples in the absence of clinical relapse. M-rels occurred at 3, 6, 39, and 52 months and were always confirmed by direct sequencing of the clonal rearrangement. Minimal residual disease was monitored by qualitative and real-time quantitative PCR. All patients received 4 courses of rituximab, with 2 additional infusions if PCR positivity remained. After 4-6 courses of rituximab, all patients re-entered MR. No clinical relapses were recorded at 3, 6, 18, and 62 months from treatment, although 1 patient had a second M-rel that was sensitive to rituximab. Our results indicate that rituximab is active against residual MCL cells and suggest that molecularly tailored maintenance therapy needs to be investigated in clinical trials.