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1.
Ann Oncol ; 22(5): 1094-1101, 2011 May.
Artículo en Inglés | MEDLINE | ID: mdl-21084429

RESUMEN

BACKGROUND: Safety and efficacy of gemcitabine plus docetaxel (GD) and capecitabine plus docetaxel (CD) were compared in patients with metastatic breast cancer, where the alternate crossover monotherapy (GD→C or CD→G) was predetermined. PATIENTS AND METHODS: Patients were randomly assigned to 3-week cycles of either gemcitabine 1000 mg/m(2) on days 1 and 8 plus docetaxel 75 mg/m(2) on day 1 or capecitabine 1000 mg/m(2) twice daily on days 1-14 plus docetaxel 75 mg/m(2) day 1. Upon progression, patients received crossover monotherapy. Primary end point was time to progression (TtP). Secondary end points evaluated overall response rate (ORR), overall survival (OS), and adverse events (AEs). RESULTS: Despite over-accrual of 475 patients, the trial matured with only 324 of 385 planned TtP events due to patient discontinuations. Human epidermal growth factor receptor 2 status was not captured in this study. More CD patients (28%) discontinued due to AEs than GD patients (18.0%, P = 0.009). TtP [hazard ratio (HR) = 1.101, 95% confidence interval (CI) 0.885-1.370, P = 0.387] and OS (HR = 1.031, 95% CI 0.830-1.280, P = 0.785) were not significantly different comparing GD and CD. ORR was not statistically different (P = 0.239) comparing GD (72 of 207, 34.8%) and CD (78 of 191, 40.8%). TtP, OS, and ORR were not significantly different comparing crossover groups. GD caused greater fatigue, hepatotoxicity, neutropenia, and thrombocytopenia but not febrile neutropenia; CD caused more hand-foot syndrome, gastrointestinal toxicity, and mucositis. CONCLUSIONS: GD and CD produced similar efficacy and toxicity profiles consistent with prior clinical experience.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Neoplasias de la Mama/tratamiento farmacológico , Adulto , Anciano , Anciano de 80 o más Años , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Neoplasias de la Mama/mortalidad , Neoplasias de la Mama/patología , Capecitabina , Estudios Cruzados , Desoxicitidina/administración & dosificación , Desoxicitidina/análogos & derivados , Supervivencia sin Enfermedad , Docetaxel , Femenino , Fluorouracilo/administración & dosificación , Fluorouracilo/análogos & derivados , Humanos , Estimación de Kaplan-Meier , Persona de Mediana Edad , Metástasis de la Neoplasia , Taxoides/administración & dosificación , Gemcitabina
2.
Leuk Lymphoma ; 42(5): 913-22, 2001.
Artículo en Inglés | MEDLINE | ID: mdl-11697646

RESUMEN

Between 1991 and 1999, 67 patients with acute non-lymphocytic leukemia (ANLL) in complete remission received high dose cytarabine (HiDAC) 3 gm/m2 q12h x 12 doses followed by daunorubicin 45 mg/m2/day x 3 days as consolidation therapy. Five year actuarial event free survival (EFS) was 34% +/- 6%. Age was significantly associated with EFS. EFS was 60% +/- 15% in patients age 20 to 29, 48% +/- 16% in patients age 30 to 39, 23% +/- 10% in patients age 40 to 49, 31% +/- 11% in patients age 50 to 59, and 0% in patients age > or = 60. Contrary to other reports which have used different HiDAC regimens, we found no relationship between cytogenetics and EFS. Cytogenetics were defined as favorable risk: t(8;21), inv (16), and del (16); neutral risk: normal or t(15;17); and unfavorable risk: any abnormality not included in favorable risk or neutral risk. EFS was 29% +/- 17% in patients with favorable cytogenetics, 37% +/- 14% in patients with neutral cytogenetics, and 31% +/- 12% in patients with unfavorable cytogenetics. These differences were not statistically significant. Because of the successful use of allogeneic transplantation at relapse in patients with matched related donors, five year actuarial survival (S) in this series was 40% +/- 6%. Five year actuarial survival was 57% +/- 9% for patients age < or = 44 and 25% +/- 8% for patients age > or = 45. This difference is statistically significant, p < .025. Clinicians should be cautious about making clinical decisions regarding consolidation therapy of ANLL on the basis of the presence or absence of cytogenetic abnormalities as the importance of cytogenetics may depend on the specific therapy which is employed.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/administración & dosificación , Leucemia Mieloide Aguda/diagnóstico , Leucemia Mieloide Aguda/tratamiento farmacológico , Análisis Actuarial , Adulto , Factores de Edad , Citarabina/administración & dosificación , Análisis Citogenético , Daunorrubicina/administración & dosificación , Supervivencia sin Enfermedad , Femenino , Humanos , Leucemia Mieloide Aguda/mortalidad , Masculino , Persona de Mediana Edad , Pronóstico , Estudios Retrospectivos , Factores de Riesgo
3.
Bone Marrow Transplant ; 28(3): 265-70, 2001 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-11535994

RESUMEN

A retrospective single center study was performed to evaluate the safety and efficacy of valacyclovir for prevention of cytomegalovirus (CMV) infection (reactivation) after allogeneic stem cell transplantation (SCT). We compared a group of 31 patients at risk for CMV reactivation (donor, recipient or both seropositive for CMV) who received valacyclovir at an oral dose of 1 g three times a day for CMV prophylaxis with a matched cohort of 31 patients who did not receive the drug or any other form of CMV prophylaxis. Valacyclovir was used as primary prophylaxis in 12 patients and as secondary prophylaxis (after a prior CMV reactivation was effectively treated with either ganciclovir or foscarnet and without CMV antigenemia at the start of valacyclovir) in the remaining 19 patients. The two treatment groups were well matched for the donor-recipient CMV serological status and other pre-transplant characteristics. CMV reactivation was detected by blood antigenemia testing using a commercially available immunofluorescence assay for CMV lower matrix protein pp65 in circulating leukocytes. For primary prophylaxis, 3/12 patients who received valacyclovir reactivated CMV compared to 24/31 patients in the control group (P < 0.001). For secondary prophylaxis, 5/19 valacyclovir patients reactivated compared to 16/24 control patients (P < 0.05). Valacyclovir was well tolerated except for infrequent and mild gastrointestinal side-effects. There was no difference in the incidence of CMV disease in the two groups. Prophylaxis with valacyclovir appears to be safe and efficacious in preventing both primary and secondary CMV reactivation in at-risk patients after allogeneic SCT. Larger prospective randomized studies will be required to confirm these observations.


Asunto(s)
Aciclovir/análogos & derivados , Aciclovir/administración & dosificación , Infecciones por Citomegalovirus/prevención & control , Trasplante de Células Madre Hematopoyéticas/efectos adversos , Valina/análogos & derivados , Valina/administración & dosificación , Aciclovir/toxicidad , Adulto , Antivirales/administración & dosificación , Antivirales/toxicidad , Estudios de Cohortes , Seguridad de Productos para el Consumidor , Infecciones por Citomegalovirus/inducido químicamente , Infecciones por Citomegalovirus/tratamiento farmacológico , Femenino , Humanos , Masculino , Persona de Mediana Edad , Fosfoproteínas/sangre , Estudios Retrospectivos , Equivalencia Terapéutica , Trasplante Homólogo/efectos adversos , Valaciclovir , Valina/toxicidad , Proteínas de la Matriz Viral/sangre , Activación Viral/efectos de los fármacos
4.
Nature ; 412(6849): 812-5, 2001 Aug 23.
Artículo en Inglés | MEDLINE | ID: mdl-11518964

RESUMEN

After the 1987 Whittier Narrows and 1994 Northridge earthquakes revealed that blind thrust faults represent a significant threat to metropolitan Los Angeles, a network of 250 continuously recording global positioning system (GPS) stations was deployed to monitor displacements associated with deep slip on both blind and surface faults. Here we augment this GPS data with interferometric synthetic aperture radar imagery to take into account the deformation associated with groundwater pumping and strike-slip faulting. After removing these non-tectonic signals, we are left with 4.4 mm yr-1 of uniaxial contraction across the Los Angeles basin, oriented N 36 degrees E (perpendicular to the major strike-slip faults in the area). This indicates that the contraction is primarily accommodated on thrust faults rather than on the northeast-trending strike-slip faults. We have found that widespread groundwater and oil pumping obscures and in some cases mimics the tectonic signals expected from the blind thrust faults. In the 40-km-long Santa Ana basin, groundwater withdrawal and re-injection produces 12 mm yr-1 of long-term subsidence, accompanied by an unprecedented seasonal oscillation of 55 mm in the vertical direction and 7 mm horizontally.

5.
Leuk Lymphoma ; 40(5-6): 521-8, 2001 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-11426525

RESUMEN

Between 9/86 and 6/98, 22 patients with relapsed or refractory high grade lymphoma received intensified preparative therapy and underwent autologous transplantation at a single institution. Two intensified preparative regimens were used--cyclophosphamide, etoposide, total body irradiation (CY-VP-TBI) (N=17) and cyclophosphamide, BCNU, etoposide (CBV) (N=5). For all patients undergoing autologous transplantation, 5 year actuarial survival (S) and 5 year event free survival (EFS) were only 18% +/- 8%. Treatment related mortality was 14% overall but only 8% in patients receiving G-CSF or GM-CSF. Survival was significantly inferior to the survival observed in a concurrent series of patients with intermediate grade lymphoma, 34% +/- 6%, p < .05. Using high dose therapy in conjunction with autologous transplantation at the time of relapse may not be as valuable a strategy in high-grade lymphoma as in intermediate grade lymphoma although most studies combine the two disorders. Alternative strategies for the use of transplantation in high grade lymphoma, such as the use of transplantation as consolidation therapy, need to be investigated.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/administración & dosificación , Trasplante de Células Madre Hematopoyéticas , Linfoma no Hodgkin/terapia , Terapia Combinada , Humanos , Linfoma no Hodgkin/patología , Recurrencia , Estudios Retrospectivos , Terapia Recuperativa , Análisis de Supervivencia , Trasplante Autólogo , Irradiación Corporal Total
6.
Leuk Lymphoma ; 41(3-4): 343-52, 2001 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-11378547

RESUMEN

Between September 1986 and June 1998, 32 patients with relapsed or refractory intermediate or high grade lymphoma received intensified preparative therapy and underwent allogeneic transplantation at a single institution. Patients were considered for allogeneic transplantation if they failed to respond to initial therapy, failed to respond to salvage therapy, relapsed after autologous transplantation, had bone marrow involvement, or failed attempts to harvest autologous stem cells. Patients had a median age of 39 years and had generally received at least two chemotherapy regimens. Five year actuarial survival (S) was 16% +/- 6%; median survival was 4 months. Survival was significantly worse in patients who had received high intensity brief duration chemotherapy prior to transplantation and was also significantly worse in patients who did not receive total body irradiation (TBI). This likely reflects the fact that the patients with the most resistant disease had required local radiotherapy and could not receive TBI. While treatment related mortality played a major role in limiting the effectiveness of allogeneic transplantation, in this heavily pre-treated population of patients with resistant disease, only 39% of patients achieved a complete response following allogeneic transplantation, and in only 40% of that group was long term disease free survival achieved.


Asunto(s)
Trasplante de Células Madre Hematopoyéticas/métodos , Linfoma no Hodgkin/terapia , Acondicionamiento Pretrasplante/métodos , Análisis Actuarial , Adolescente , Adulto , Niño , Supervivencia sin Enfermedad , Femenino , Trasplante de Células Madre Hematopoyéticas/mortalidad , Trasplante de Células Madre Hematopoyéticas/normas , Humanos , Linfoma no Hodgkin/mortalidad , Masculino , Persona de Mediana Edad , Recurrencia , Estudios Retrospectivos , Tasa de Supervivencia , Acondicionamiento Pretrasplante/mortalidad , Acondicionamiento Pretrasplante/normas , Trasplante Homólogo/métodos , Trasplante Homólogo/mortalidad , Trasplante Homólogo/normas , Resultado del Tratamiento
7.
Leuk Lymphoma ; 41(1-2): 97-103, 2001 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-11342361

RESUMEN

Between September 1986 and June 1998, 157 patients with low grade, intermediate grade, or high grade lymphoma underwent autologous transplantation at a single institution. Two preparative regimens were used: cyclophosphamide, etoposide, total body irradiation (CY-VP-TBI) (N=110) and cyclophosphamide, BCNU, etoposide (CBV) (N=47). The two groups were not significantly different with respect to source of stem cells, gender, stage at presentation, incidence of prior bone marrow involvement, sensitivity to salvage therapy, or histologic grade of lymphoma. The CBV group was significantly older, 49% of patients over age 50, as compared to 26% of patients over age 50 for the CY-VP-TBI group. Response rates and the incidence of fatal toxicity were similar for the two groups. Five year actuarial survival was 31% +/- 9% for CBV and 38% +/- 5% for CY-VP-TBI, p =.85. In a multivariate analysis, in which preparative regimen, age, histologic grade of lymphoma, and sensitivity to salvage therapy were the independent variables, TBI was not significantly associated with survival, and the direction of the trend was for TBI to be less effective than CBV. TBI does not appear to be an essential component of preparative therapy for autologous transplantation in patients with lymphoma.


Asunto(s)
Linfoma no Hodgkin/terapia , Acondicionamiento Pretrasplante/métodos , Trasplante Autólogo/métodos , Irradiación Corporal Total/normas , Adolescente , Adulto , Anciano , Protocolos de Quimioterapia Combinada Antineoplásica/administración & dosificación , Terapia Combinada , Femenino , Trasplante de Células Madre Hematopoyéticas/métodos , Trasplante de Células Madre Hematopoyéticas/mortalidad , Trasplante de Células Madre Hematopoyéticas/normas , Humanos , Linfoma no Hodgkin/complicaciones , Linfoma no Hodgkin/mortalidad , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Tasa de Supervivencia , Acondicionamiento Pretrasplante/mortalidad , Acondicionamiento Pretrasplante/normas , Trasplante Autólogo/mortalidad , Trasplante Autólogo/normas , Resultado del Tratamiento , Irradiación Corporal Total/mortalidad
8.
Bone Marrow Transplant ; 25(7): 717-22, 2000 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-10745256

RESUMEN

The objective of this study was to describe the outcome of allogeneic stem cell transplantation (alloSCT) in a series of patients with B cell chronic lymphocytic leukemia (B-CLL). Twenty-three B-CLL patients were transplanted between 1988 and 1997 using stem cells from a related (n = 20) or an unrelated donor (n = 3). The median age of the patients was 46 years, and the median number of prior chemotherapy regimens received was two. At transplantation, 14 patients had chemorefractory disease and 12 of these were refractory to fludarabine. The preparative regimens included total body irradiation (TBI) in 22 of the 23 cases. All patients received graft-versus-host disease (GVHD) prophylaxis with cyclosporine and methotrexate. Twenty patients (87%) achieved a complete remission (CR). The incidence of grade II-IV acute GVHD was 54%. Fourteen (61%) patients are alive and disease-free, including two with unrelated donors, at a median of 26 months (range, 9-115 months). Nine patients (39%) have died, one of whom had progressive B-CLL. The only favorable prognostic factor for failure-free survival (FFS) and overall survival (OS) after alloSCT was the use of a cyclophosphamide/TBI rather than an etoposide/cyclophosphamide/TBI regimen (P = 0.03). The projected 5-year FFS, OS, and relapse rates after alloSCT were 65% (95% CI, 48-88%), 62% (95% CI, 43-88%), and 5% (95%, CI 0-13%), respectively. These findings demonstrate the potential of high-dose therapy and alloSCT for inducing and maintaining a remission in patients with advanced or chemorefractory B-CLL. The low relapse rate may be due to an allogeneic graft-versus-leukemia effect.


Asunto(s)
Trasplante de Células Madre Hematopoyéticas , Leucemia Linfocítica Crónica de Células B/terapia , Adulto , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Estudios de Cohortes , Supervivencia sin Enfermedad , Femenino , Enfermedad Injerto contra Huésped/epidemiología , Humanos , Leucemia Linfocítica Crónica de Células B/mortalidad , Leucemia Linfocítica Crónica de Células B/patología , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Recurrencia , Inducción de Remisión , Estudios Retrospectivos , Análisis de Supervivencia , Trasplante Homólogo , Resultado del Tratamiento
9.
Bone Marrow Transplant ; 25(3): 257-62, 2000 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-10673696

RESUMEN

Between September 1986 and June 1998, 99 patients with relapsed or refractory IGL received intensified preparative therapy and underwent autologous transplantation at a single institution. Two intensified preparative regimens were used: cyclophosphamide, etoposide, total body irradiation (CY-VP-TBI) (n = 66) and cyclophosphamide, BCNU, etoposide (CBV) (n = 33). As clinical features and results were not different for the two preparative regimens, results were combined. For all patients undergoing autologous transplantation, 5-year actuarial overall survival (OS) was 34% +/- 6%; 5-year event-free survival (EFS) was 26% +/- 5%. For patients who responded to primary therapy, salvage therapy, or both, OS was 42% +/- 7%; for non-responders to prior therapy, OS was 14% +/- 7%, P < 0.025. OS was better among patients responding to salvage therapy (50% +/- 9%), than among patients who had a complete response to initial therapy, but failed to respond or were untested/unevaluable with respect to salvage therapy (26% +/- 10%; P < 0.025). On multivariate analysis, response to salvage therapy was associated with survival following autologous transplantation (P < 0. 005). Treatment related mortality was 9% overall and only 6% after G-CSF and GM-CSF were introduced into routine clinical practice. High-intensity preparative therapy is highly effective, with acceptable treatment-related mortality, in patients with IGL who have responded to induction therapy, salvage therapy, or both. The best responses are observed in patients responding to salvage therapy. Randomized prospective studies will be needed to further define the role of intensified preparative regimens. Bone Marrow Transplantation (2000) 25, 257-262.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Linfoma no Hodgkin/terapia , Adolescente , Adulto , Anciano , Carmustina/administración & dosificación , Terapia Combinada , Ciclofosfamida/administración & dosificación , Supervivencia sin Enfermedad , Etopósido/administración & dosificación , Femenino , Trasplante de Células Madre Hematopoyéticas , Humanos , Masculino , Persona de Mediana Edad , Recurrencia , Terapia Recuperativa , Tasa de Supervivencia , Trasplante Autólogo , Resultado del Tratamiento , Irradiación Corporal Total
10.
Leuk Lymphoma ; 35(1-2): 91-8, 1999 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-10512166

RESUMEN

To determine the long-term results of high-dose chemotherapy and stem cell support in relapsed or primary refractory Hodgkin disease patients. One hundred and thirty-one patients with relapsed or primary refractory Hodgkin's disease were treated with a dose-intensive therapy protocol consisting of etoposide (2400 mg/m2 continuous intravenous infusion) cyclophosphamide (7200 mg/m2 intravenously), and carmustine (300-600 mg/m2 intravenously) CBVi. All patients had previously failed conventional chemoradiotherapy. Severe toxicities were related to infectious, hepatic, and pulmonary complications. Fatal, regimen-related toxicity was 19%; liver and lung dysfunction, as well as infection, were the most frequent problems. Ninety-one (69%) of the patients achieved a complete response (CR) (95% CI = 59% to 75%) after CBVi and autologous stem cell infusion. With a median follow-up of 5.1 years (range 3.0 to 9.5 years), overall and event-free survival are 44% (95% CI = 33% to 47%) and 38% (95% CI = 28% to 46%) respectively. While univariate analysis did not reveal a statistically significant variable to predict a better response, responsiveness to therapy demonstrated a trend. We conclude that CBVi is an effective therapy for relapsed or refractory Hodgkin's disease, producing long-term, durable remissions.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Trasplante de Células Madre Hematopoyéticas , Enfermedad de Hodgkin/terapia , Adolescente , Adulto , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Carmustina/administración & dosificación , Terapia Combinada , Ciclofosfamida/administración & dosificación , Relación Dosis-Respuesta a Droga , Etopósido/administración & dosificación , Humanos , Infusiones Intravenosas , Persona de Mediana Edad , América del Norte , Recurrencia , Trasplante Autólogo , Resultado del Tratamiento
11.
Bone Marrow Transplant ; 23(3): 227-33, 1999 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-10084253

RESUMEN

Between 1985 and 1996, 51 patients with relapsed or refractory small cleaved cell lymphoma (SCCL) received high-dose chemotherapy +/- TBI in conjunction with autologous (ABMT) (36 patients) or allogeneic transplantation (15 patients). Patients were eligible for ABMT if the bone marrow biopsy done prior to the planned transplant did not reveal microscopic involvement with SCCL. Patients receiving ABMT had a median age of 48 years, had received a median of 2.5 chemotherapy regimens prior to transplantation, and were transplanted a median of 35.5 months from diagnosis. Among patients receiving ABMT, 5 year actuarial survival was 56+/-11%. Median survival was 126+ months, and median survival from diagnosis was 191 months. Univariate and multivariate analysis identified sensitive disease as the best predictor of a favorable response. Five-year actuarial survival was 66+/-12% for patients with sensitive disease at the time of transplant as compared to 29+/-17% for patients with resistant disease, P = 0.015. Median survival in patients with sensitive disease at the time of ABMT was 126+ months. By univariate analysis, survival was significantly better for patients receiving ABMT as compared to patients receiving allogeneic transplants. Median survival following allogeneic transplantation was 5 months; 5 year actuarial survival was 15+/-13%. In a multivariate analysis, which considered autologous vs allogeneic transplantation, sensitive vs resistant disease, <3 vs > or = 3 prior treatments, and prior bone marrow involvement, allogeneic transplantation was significantly associated with poor survival. Treatment-related mortality occurred in eight of 15 patients receiving allogeneic transplantation and limited the effectiveness of this therapy. High-dose therapy in conjunction with ABMT is effective therapy for patients with SCCL whose disease is sensitive to chemotherapy and whose marrows are microscopically free of disease. Because of possible selection bias, it has not been proven that this approach increases survival in these patients. Treatment-related mortality limits the effectiveness of allogeneic transplantation in SCCL.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Trasplante de Médula Ósea , Linfoma Folicular/terapia , Adulto , Protocolos de Quimioterapia Combinada Antineoplásica/administración & dosificación , Trasplante de Médula Ósea/mortalidad , Terapia Combinada , Supervivencia sin Enfermedad , Femenino , Enfermedad Injerto contra Huésped/prevención & control , Humanos , Terapia de Inmunosupresión , Tablas de Vida , Linfoma Folicular/tratamiento farmacológico , Linfoma Folicular/mortalidad , Masculino , Persona de Mediana Edad , Análisis Multivariante , Estudios Retrospectivos , Terapia Recuperativa , Análisis de Supervivencia , Acondicionamiento Pretrasplante , Trasplante Autólogo , Trasplante Homólogo , Resultado del Tratamiento , Irradiación Corporal Total
12.
Bone Marrow Transplant ; 24(12): 1359-61, 1999 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-10627649

RESUMEN

A 31-year-old female with lymphoblastic lymphoma developed myasthenia gravis (MG) 26 months after receiving an allogeneic bone marrow transplant (BMT) from an HLA-identical sister. She presented with classic symptoms and electromyographic evidence of the disorder approximately 2 weeks after electing to abruptly discontinue her immunosuppressive medications. She initially responded to steroids and acetylcholinesterase inhibitors. Her subsequent course has been characterized by episodes of moderately severe weakness that respond to intravenous immunoglobulin and prednisone. This case of post-transplant MG is only the second reported to have occurred in association with BMT for lymphoblastic lymphoma. Potential risk factors for the development of post-transplant MG are discussed including underlying hematological disorder, HLA phenotype, family history of MG, the presence of chronic GVHD, and recent cessation of immune suppression.


Asunto(s)
Trasplante de Médula Ósea/efectos adversos , Miastenia Gravis/etiología , Leucemia-Linfoma Linfoblástico de Células Precursoras/terapia , Adulto , Inhibidores de la Colinesterasa/uso terapéutico , Salud de la Familia , Femenino , Humanos , Inmunosupresores/uso terapéutico , Leucemia-Linfoma Linfoblástico de Células Precursoras/sangre , Trasplante Homólogo
14.
Clin Infect Dis ; 23(5): 1012-9, 1996 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-8922795

RESUMEN

Infections caused by Nocardia species have been infrequently described in bone marrow transplant (BMT) recipients. We reviewed six cases of nocardiosis occurring in our population of BMT recipients and the four cases previously reported in the literature. The rate of nocardial infection at our institution was 0.2% (1 of 554) among autologous BMT recipients and 1.7% (5 of 302) among allogeneic BMT recipients (odds ratio, 9.3 [95% confidence interval, 1.1-80.1]; P = .046). All 10 patients had received immunosuppressive medications, and all but one allogeneic BMT recipient had acute or chronic graft-vs.-host disease (GVHD). Four patients had extensive exposure to soil or dust before nocardiosis developed. Seventy percent of the patients died, but death was less often due to progressive nocardial infection than to complications of GVHD and associated invasive infection with Aspergillus species. Three patients had nocardiosis despite receiving prophylaxis with trimethoprim-sulfamethoxazole (TMP-SMZ) on an intermittent basis two or three times a week. These data show that nocardial infection is an important if infrequent complication of bone marrow transplantation and is associated with a high rate of invasive fungal infection. TMP-SMZ prophylaxis given intermittently does not reliably protect against infection.


Asunto(s)
Trasplante de Médula Ósea/efectos adversos , Nocardiosis/prevención & control , Nocardia/aislamiento & purificación , Combinación Trimetoprim y Sulfametoxazol/farmacología , Adulto , Resultado Fatal , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Nocardiosis/tratamiento farmacológico , Nocardiosis/fisiopatología
15.
J Prosthet Dent ; 76(4): 356-62, 1996 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-8897290

RESUMEN

Currently available impression materials were not designed for disinfection or sterilization, and it is conceivable that disinfectants may adversely affect impressions. This study evaluated the accuracy and dimensional stability of polyether (Permadyne/Impregum) and polyvinyl siloxane (Express) impression materials retained by their adhesives in two different acrylic resin tray designs (perforated and nonperforated) when the materials were immersed for either 30 or 60 minutes in three high-level disinfectants. Distilled water and no solution served as controls. A stainless steel test analog similar to ADA specification No. 19 was used. A total of 400 impressions were made with all combinations of impression materials, tray designs, disinfectant, and soaking times. Samples were evaluated microscopically before and after immersion and 48 hours after soaking. Results indicated that these two impression materials were dimensionally stable. Because the results emphasized the stability and accuracy of the impression complex under various conditions, dentists can perform disinfection procedures similar to the protocol of this study without concern for clinically significant distortion of the impression.


Asunto(s)
Desinfectantes Dentales/química , Materiales de Impresión Dental/química , Análisis de Varianza , Clorofenoles/química , Éteres/química , Glutaral/química , Ensayo de Materiales , Polivinilos/química , Resinas Sintéticas/química , Siloxanos/química
16.
Leuk Lymphoma ; 23(1-2): 93-8, 1996 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-9021690

RESUMEN

High dose cytosine arabinoside (ARA-C) has produced long term relapse free survival in 26% to 49% of patients when used as consolidation therapy of acute non-lymphocytic leukemia (ANLL) in first remission. However, the optimal consolidation regimen has not been defined. In this pilot study we attempted to confirm and extend our previous studies of high dose consolidation therapy by administering two cycles of consolidation chemotherapy to patients with ANLL in first remission. The first cycle was high dose ARA-C 3 gm/m2 over 1 hour every 12 hours for 12 doses followed by daunorubicin 45 mg/m2/day for three days. The second cycle was etoposide 75 mg/m2/day for 10 days and mitoxantrone 12 mg/m2/day for three days. Twenty-three patients received high dose consolidation chemotherapy, 13 of whom received the proposed two cycles. The major reason for not receiving the planned second consolidation cycle was life threatening toxicity, primarily fungal infection, during the first consolidation cycle. By actuarial estimate, 46% of patients receiving consolidation chemotherapy were projected to be relapse free at 36 months. There were no deaths during consolidation. Survival was not improved in patients receiving etoposide and mitoxantrone as the second cycle of consolidation therapy as compared to patients receiving only one cycle of consolidation therapy.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Leucemia-Linfoma Linfoblástico de Células Precursoras/tratamiento farmacológico , Adulto , Citarabina/uso terapéutico , Daunorrubicina/uso terapéutico , Relación Dosis-Respuesta a Droga , Etopósido/uso terapéutico , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Mitoxantrona/uso terapéutico , Proyectos Piloto , Estudios Prospectivos , Inducción de Remisión/métodos , Terapia Recuperativa
17.
Ann Intern Med ; 124(1 Pt 1): 75; author reply 77, 1996 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-7503488
18.
J Clin Oncol ; 13(7): 1742-50, 1995 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-7602364

RESUMEN

PURPOSE: Clinicopathologic features of 44 patients with well-documented T-cell-rich B-cell lymphomas (TCRBCLs) were reviewed to determine if there were distinguishing clinical characteristics and to evaluate the responsiveness to therapy. PATIENTS AND METHODS: Forty-one patients had de novo TCRBCL, while three patients had a prior diagnosis of diffuse large B-cell lymphoma. Seventeen TCRBCLs were identified from a retrospective analysis of 176 lymphomas diagnosed before 1988 as peripheral T-cell lymphoma (PTCLs). The initial pathologic diagnosis was incorrect in 36 of 44 cases (82%), usually due to the absence of adequate immunophenotypic and/or genotypic studies at the initial study. RESULTS: The median age of patients was 53 years (range, 17 to 92), and the male-to-female ratio was 1.4:1. B symptoms were present in 22 of 41 patients (54%); splenomegaly was detected in 11 patients (25%). Clinical stage at diagnosis was as follows: I (n = 8), II (n = 6), III (n = 15), IV (n = 14), and unstaged (n = 1). Although therapy was heterogeneous, the disease-free survival (DFS) and overall survival (OS) rates at 3 years for patients with de novo TCRBCL were 29% and 46%, respectively. A complete response (CR) to combination chemotherapy for intermediate-grade lymphomas was observed in 16 of 26 patients (62%); 11 of these patients (42%) had a continuous CR, compared with one of 14 patients (7%) who received radiation therapy or therapy for low-grade lymphoma or Hodgkin's disease (HD) (P < .05). However, there was no difference in OS between patients who received chemotherapy for intermediate-grade lymphoma versus other therapies (49% v 48%) due to a high response rate to salvage therapies, including seven patients without disease after marrow transplantation. CONCLUSION: TCRBCLs are difficult to recognize without immunoperoxidase studies. Patients with TCRBCL have clinical features similar to patients with other large B-cell lymphomas, except they may have more splenomegaly and advanced-stage disease; they should receive combination chemotherapy directed at large-cell lymphomas.


Asunto(s)
Linfoma de Células B/patología , Linfoma no Hodgkin/patología , Linfoma de Células T/patología , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Trasplante de Médula Ósea , Femenino , Humanos , Linfoma de Células B/mortalidad , Linfoma de Células B/terapia , Linfoma no Hodgkin/mortalidad , Linfoma no Hodgkin/terapia , Linfoma de Células T/mortalidad , Linfoma de Células T/terapia , Masculino , Persona de Mediana Edad
19.
J Prosthet Dent ; 73(6): 534-41, 1995 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-11791264

RESUMEN

The objective of this investigation was to determine whether titanium could be used to cast reproducible multiple-unit dental restorations. A metal analog was machined to simulate preparations for a three-unit fixed partial denture. Castings were made with four different sprue designs at three temperatures. Marginal accuracy and porosity were evaluated. A total of 70 titanium castings were made with an argon/electric arc/vacuum/pressure casting machine. Ten castings were made in the conventional manner by use of gold-palladium alloy as a control to compare the marginal gap. The results revealed that the porosity was less when a large individual sprue (6-gauge) was used. It was also noted that the lower pattern burnout temperatures of 910 degrees C and 920 degrees C exhibited significantly smaller marginal gaps than did the higher temperature of 930 degrees C.


Asunto(s)
Revestimiento para Colado Dental/química , Titanio/química , Análisis de Varianza , Argón , Técnica de Colado Dental/instrumentación , Diseño de Dentadura , Dentadura Parcial Fija , Electricidad , Aleaciones de Oro/química , Calor , Humanos , Ensayo de Materiales , Paladio/química , Porosidad , Presión , Estadística como Asunto , Estadísticas no Paramétricas , Propiedades de Superficie , Vacio
20.
Bone Marrow Transplant ; 15(3): 401-5, 1995 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-7599565

RESUMEN

We performed a sequential study comparing two regimens, cyclosporine-methotrexate (CsA-MTX) and cyclosporine-methotrexate-methylprednisolone (CsA-MTX-MP) for graft-versus-host disease (GVHD) prophylaxis in patients undergoing matched unrelated donor bone marrow transplantation (MUD BMT). Study end-points were the development of GVHD, various infectious complications and survival. Twenty nine patients with malignant hematologic disease without HLA-compatible family donors were treated between May 1990 and November 1993. All donors were volunteers from the National Marrow Donor Program (NMDP) serologically HLA-A-A, B and DR identical. MLC reactivity and high resolution DR DNA typing were not used to exclude donors. Sixteen patients received CsA-MTX and 13 patients received CsA-MTX-MP. CsA and MTX doses were the same in both groups: CsA 1.5 mg/kg i.v. over 2h every 12h beginning the day prior to transplant (day-1) and MTX 10 mg/m2 i.v. bolus on days +1, +3 and +6 with leucovorin on days +2, +4 and +7. MP was administered at a dose of 0.25 mg/kg i.v. every 12h beginning on day +7 and increased to 0.5 mg/kg on day +14. Beginning on day +35 MP and CsA were tapered 5% per week with targeted discontinuation at 6 months. Both groups were comparable for primary disease, preparative regimen, recipient age (median 33 VS 33 years), donor age (median 39 vs 39.5 years), donor-recipient sex, donor ABO mismatch and serologic CMV positivity. All patients received similar supportive care.(ABSTRACT TRUNCATED AT 250 WORDS)


Asunto(s)
Trasplante de Médula Ósea , Ciclosporina/uso terapéutico , Enfermedad Injerto contra Huésped/prevención & control , Metotrexato/uso terapéutico , Metilprednisolona/uso terapéutico , Adolescente , Adulto , Niño , Preescolar , Quimioterapia Combinada , Femenino , Histocompatibilidad , Humanos , Incidencia , Infecciones/epidemiología , Infecciones/mortalidad , Masculino , Tasa de Supervivencia
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