Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 61
Filtrar
1.
Leukemia ; 31(9): 1928-1935, 2017 09.
Artículo en Inglés | MEDLINE | ID: mdl-28090092

RESUMEN

The genetics behind the progression of myelodysplasia to secondary acute myeloid leukemia (sAML) is poorly understood. In this study, we profiled somatic mutations and their dynamics using next generation sequencing on serial samples from a total of 124 patients, consisting of a 31 patient discovery cohort and 93 patients from two validation cohorts. Whole-exome analysis on the discovery cohort revealed that 29 of 31 patients carry mutations related to at least one of eight commonly mutated pathways in AML. Mutations in genes related to DNA methylation and splicing machinery were found in T-cell samples, which expand at the initial diagnosis of the myelodysplasia, suggesting their importance as early disease events. On the other hand, somatic variants associated with signaling pathways arise or their allelic burdens expand significantly during progression. Our results indicate a strong association between mutations in activated signaling pathways and sAML progression. Overall, we demonstrate that distinct categories of genetic lesions play roles at different stages of sAML in a generally fixed order.


Asunto(s)
Células Clonales/patología , Síndromes Mielodisplásicos/patología , Adulto , Anciano , Anciano de 80 o más Años , Transformación Celular Neoplásica/genética , Metilación de ADN/genética , Progresión de la Enfermedad , Femenino , Humanos , Leucemia Mieloide Aguda , Masculino , Persona de Mediana Edad , Mutación , Síndromes Mielodisplásicos/genética , Transducción de Señal/genética , Empalmosomas/genética
2.
Ann Oncol ; 24(3): 756-60, 2013 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-23117072

RESUMEN

BACKGROUND: This study explored the impact of genetic polymorphisms in cytochrome P450 (CYP) enzymes and transporters on the plasma trough concentration of imatinib mesylate (IM) and clinical response in chronic myeloid leukemia (CML). PATIENTS AND METHODS: In total, 82 patients with CML who had been administered 400 mg IM daily for over 6 months were genotyped for 11 single-nucleotide polymorphisms in nine genes (CYP3A4, CYP3A5, CYP2C9, CYP2C19, CYP2D6, ABCB1, SLC22A1, SLC22A2 and ABCG2) using blood samples. The trough imatinib concentration and clinical responses were assessed 6 months after the initiation of IM therapy. RESULTS: The CC, CA and AA genotypes in ABCG2 421C>A gave significantly different frequencies for the major molecular response (MMR) (P = 0.02). However, no significant differences were found between the genotypes of the CYP enzymes and transporters identified in this study and the imatinib plasma trough concentrations and clinical response frequencies, except for the correlation of ABCG2 with MMR. CONCLUSIONS: The results of the present study may indicate that the ABCG 421C>A genetic polymorphism influences the MMR of imatinib in patients with CML.


Asunto(s)
Antineoplásicos/farmacocinética , Benzamidas/farmacocinética , Leucemia Mielógena Crónica BCR-ABL Positiva/genética , Piperazinas/farmacocinética , Polimorfismo de Nucleótido Simple , Pirimidinas/farmacocinética , Subfamilia B de Transportador de Casetes de Unión a ATP , Miembro 1 de la Subfamilia B de Casetes de Unión a ATP/genética , Transportador de Casetes de Unión a ATP, Subfamilia G, Miembro 2 , Transportadoras de Casetes de Unión a ATP/genética , Adolescente , Adulto , Anciano , Hidrocarburo de Aril Hidroxilasas/genética , Femenino , Frecuencia de los Genes , Genotipo , Humanos , Mesilato de Imatinib , Leucemia Mielógena Crónica BCR-ABL Positiva/tratamiento farmacológico , Leucemia Mielógena Crónica BCR-ABL Positiva/enzimología , Masculino , Persona de Mediana Edad , Proteínas de Neoplasias/genética , Proteínas de Transporte de Catión Orgánico/genética , Transportador 2 de Cátion Orgánico , Resultado del Tratamiento , Adulto Joven
3.
Bone Marrow Transplant ; 45(10): 1540-5, 2010 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-20190848

RESUMEN

Acute GVHD (aGVHD) is an important risk factor for predicting the incidence or severity of chronic GVHD (cGVHD). Transplant outcome can be influenced by the onset time of aGVHD in patients who have received allogeneic PBSC transplants (PBSCTs). The medical records of 134 patients who survived more than 3 months after myeloablative allogeneic PBSCT were retrospectively reviewed. In all, 38 patients (28.4%) developed grade II-IV aGVHD before day +28 (early aGVHD) and 25 patients (18.7%) after day +28 (late aGVHD). The 5-year cumulative incidence of cGVHD was 78.9% in the early-aGVHD group and 56.6% in the late-aGVHD group (P=0.034). The 5-year OS was 51.0% for the early-aGVHD and 80.8% for the late-aGVHD group (P=0.406). Infection was the primary cause of death for the early-aGVHD group (51.4 vs 16.7%, P=0.017), whereas relapse of the primary disease was higher among the patients with late aGVHD, although this was statistically insignificant (58.3 vs 25.7%, P=0.309). In a multivariate analysis, early aGVHD was identified as a risk factor for developing cGVHD (hazard ratio (HR) 2.278, P=0.004). The development of aGVHD early after allogeneic PBSCT increased the risk of cGVHD and infection-related death rate when compared with the late onset of aGVHD.


Asunto(s)
Progresión de la Enfermedad , Enfermedad Injerto contra Huésped/epidemiología , Enfermedad Injerto contra Huésped/fisiopatología , Enfermedad Aguda , Adolescente , Adulto , Enfermedad Crónica , Femenino , Enfermedad Injerto contra Huésped/complicaciones , Enfermedad Injerto contra Huésped/diagnóstico , Enfermedades Hematológicas/mortalidad , Enfermedades Hematológicas/terapia , Humanos , Incidencia , Masculino , Registros Médicos , Persona de Mediana Edad , Infecciones Oportunistas/complicaciones , Infecciones Oportunistas/mortalidad , Trasplante de Células Madre de Sangre Periférica/efectos adversos , Pronóstico , Estudios Retrospectivos , Factores de Riesgo , Índice de Severidad de la Enfermedad , Análisis de Supervivencia , Resultado del Tratamiento , Adulto Joven
4.
Ann Oncol ; 21(3): 525-529, 2010 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-19759184

RESUMEN

BACKGROUND: The polymorphisms in DNA repair genes may contribute to a variation in the DNA repair capacity, thereby affecting the risk of carcinogenesis and prognosis of colorectal cancer. Accordingly, the present study analyzed 14 polymorphisms in DNA repair genes and their impact on the prognosis for patients with colorectal cancer. MATERIALS AND METHODS: Three hundred and ninety-seven consecutive patients with curatively resected colorectal adenocarcinoma were enrolled in the present study. The genomic DNA was extracted from fresh colorectal tissue and 14 polymorphisms of DNA repair genes determined using a real-time PCR genotyping assay. RESULTS: The median age of the patients was 63 years, and 218 (54.9%) patients had colon cancer, while 179 (45.1%) patients had rectal cancer. A multivariate survival analysis, including age, differentiation, carcinoembryonic antigen level, and stage, revealed a better survival for the patients with the combined IVS10+12AG and GG genotype than for the patients with the IVS10+12AA genotype [disease-free survival: hazard ratio (HR) 0.47, 95% confidence interval (CI) 0.30-0.75, P = 0.002; overall survival: HR 0.50, 95% CI 0.26-0.98, P = 0.042]. None of the other polymorphisms was associated with survival. CONCLUSION: The IVS10+12A>G polymorphism in the hMSH2 gene was found to be an independent prognostic marker for patients with colorectal cancer.


Asunto(s)
Adenocarcinoma/genética , Biomarcadores de Tumor/genética , Carcinoma de Células en Anillo de Sello/genética , Neoplasias Colorrectales/genética , Enzimas Reparadoras del ADN/genética , Proteína 2 Homóloga a MutS/genética , Polimorfismo Genético/genética , Adenocarcinoma/patología , Adenocarcinoma/terapia , Adulto , Anciano , Anciano de 80 o más Años , Carcinoma de Células en Anillo de Sello/patología , Carcinoma de Células en Anillo de Sello/terapia , Neoplasias Colorrectales/patología , Neoplasias Colorrectales/terapia , Reparación del ADN , Femenino , Genotipo , Humanos , Persona de Mediana Edad , Recurrencia Local de Neoplasia/genética , Recurrencia Local de Neoplasia/patología , Recurrencia Local de Neoplasia/terapia , Pronóstico , Factores de Riesgo , Tasa de Supervivencia , Adulto Joven
5.
J Hand Surg Eur Vol ; 35(3): 214-9, 2010 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-20007422

RESUMEN

The object of this experimental study was to assess the effect of wrapping human amniotic membrane around a repaired ulnar nerve in a rabbit model of perineural adhesion. Ulnar nerves from 10 white New Zealand rabbits were exposed bilaterally, dissected and repaired. Human amniotic membrane was then wrapped around the repair site in one limb with no such wrap in the neurorrhaphy of the contralateral limb. Three months later, the same nerves were re-explored and removed using microsurgical external neurolysis. Perineural adhesion around the ulnar nerve was evaluated by blinded surgical dissection and scored using a visual 4-point qualitative scale. Extent and grade of fibrosis around repair sites were measured microscopically (x 200) after Masson trichrome staining using measure of the depth of fibrosis and the grading criteria of adhesion. Quantitative morphometric analysis was also performed under light microscopy (x 200) with the aid of a digital counter and virtual slide imaging software (ScanScope T2, Vista, CA, USA). Human amniotic membrane wrapped nerves showed significantly less perineural adhesion and fibrosis than controls (P < 0.05). No nerve healing problems were encountered. This study suggests that human amniotic membrane application can reduce fibrosis and adhesion around neurorrhaphy sites in this animal model.


Asunto(s)
Apósitos Biológicos , Neuropatías Cubitales/terapia , Animales , Fibrosis , Humanos , Conejos , Adherencias Tisulares/patología , Neuropatías Cubitales/patología
6.
Bone Marrow Transplant ; 44(1): 35-41, 2009 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-19139732

RESUMEN

Bone loss is recognized as worsening the quality of life in long-term survivors of Allo-SCT. This study evaluated the risk factors associated with bone loss and the role of zoledronic acid in preventing bone loss in allogeneic recipients. Fifty-three patients who underwent HLA-matched Allo-SCT were evaluated for their bone mineral density (BMD) in the lumbar spine and femoral neck at regular intervals. Zoledronic acid (4 mg) was given i.v. to 18 patients (ZA patients) at 2 months after SCT and then every 3 months until 2 years. Grade 2-4 acute GVHD was associated with bone loss (odds ratio (OR)=4.90, 95% confidence interval (CI)=1.41-16.99; P=0.012) at 1 year after SCT, whereas extensive chronic GVHD and steroid use were both unfavorable prognostic factors (OR=9.00 and 7.22, 95% CI=1.52-53.40 and 1.44-36.22; P=0.016, respectively) in terms of osteopenia/osteoporosis at 2 years after transplantation. The use of zoledronic acid significantly prevented bone loss in the femoral neck as well as the spine (OR=0.18, 95% CI=0.05-0.69, P=0.012). Therefore, BMD measurements and the use of zoledronic acid are recommended in cases of GVHD or long-term steroid use after Allo-SCT to prevent bone loss and threatening skeletal events.


Asunto(s)
Conservadores de la Densidad Ósea/administración & dosificación , Densidad Ósea/efectos de los fármacos , Difosfonatos/administración & dosificación , Enfermedad Injerto contra Huésped/tratamiento farmacológico , Imidazoles/administración & dosificación , Osteoporosis/tratamiento farmacológico , Trasplante de Células Madre , Adolescente , Adulto , Anciano , Enfermedad Crónica , Femenino , Enfermedad Injerto contra Huésped/mortalidad , Neoplasias Hematológicas/mortalidad , Neoplasias Hematológicas/terapia , Humanos , Masculino , Persona de Mediana Edad , Osteoporosis/inducido químicamente , Osteoporosis/mortalidad , Proyectos Piloto , Esteroides/administración & dosificación , Esteroides/efectos adversos , Trasplante Homólogo , Ácido Zoledrónico
7.
Ann Oncol ; 19(8): 1477-1484, 2008 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-18385201

RESUMEN

BACKGROUND: This national survey was undertaken to propose the classification of extranodal natural killer (NK)/T-cell lymphoma (NTCL) subtypes and to clarify a clinical heterogeneity. PATIENTS AND METHODS: Two hundred and eighty patients newly diagnosed as NTCL were enrolled from 22 Korean medical centers. Two subsets were compared: one involving the upper aerodigestive tract (UAT) and another involving the non-upper aerodigestive tract (NUAT) region, which comprises the skin, gastrointestinal tract, and liver or soft tissues. Clinical prognostic factors, survival outcomes, and independent predictors for survival were compared between each subset. RESULTS: NUAT-NTCL (59 patients) had significantly higher proportions of disseminated disease, aggressive biologic features, and unfavorable host reactions compared with UAT-NTCL (221 patients). NUAT-NTCL had shortened 5-year overall survival (OS) (22% versus 41%, P = 0.001). Ann Arbor staging, the International Prognostic Index, and the NTCL prognostic index failed to predict the OS of NUAT-NTCL, but did predict the OS in UAT-NTCL. Independent predictors for OS by multivariate analyses differed between each subset. In the NUAT subset, extranodal sites and regional nodes predicted the OS, while Ann Arbor staging, age, performance status, and lactate dehydrogenase level predicted the OS in the UAT subset. CONCLUSION: NUAT-NTCL may represent a distinctive disease entity in terms of clinical factors, independent predictors, and survival outcomes.


Asunto(s)
Linfoma Extranodal de Células NK-T/clasificación , Neoplasias Nasales/clasificación , Femenino , Neoplasias de Cabeza y Cuello/clasificación , Neoplasias de Cabeza y Cuello/patología , Humanos , Linfoma Extranodal de Células NK-T/patología , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Neoplasias Nasales/patología , Pronóstico
8.
Surg Endosc ; 22(7): 1601-8, 2008 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-18270772

RESUMEN

BACKGROUND: Laparoscopic colorectal resection has become popular. The recently developed da Vinci Surgical System promises to facilitate endoscopic surgery and overcome its disadvantages. This study therefore aimed to compare the short-term results between robotic tumor-specific mesorectal excision (R-TSME) using the da Vinci Surgical System and conventional laparoscopic tumor-specific mesorectal excision (L-TSME) in rectal cancer patients. METHODS: Between April 2006 and February 2007, 36 patients were randomly assigned to receive R-TSME or L-TSME. During the study, 18 patients underwent robotic low anterior resection using the da Vinci Surgical System, and 18 patients had conventional laparoscopic low anterior resection. Patient characteristics, perioperative clinical results, complications, and pathologic details were compared between the two groups. RESULTS: The patient characteristics were not significantly different between the two groups. The mean operating time, hemoglobin change, and conversion rate were not significantly different between the groups. Complications were treated conservatively and did not require surgical intervention in the R-TSME group. The average length of stay was 6.9 +/- 1.3 days in the R-TSME group and 8.7 +/- 1.3 days in the L-TSME group (p < 0.001). The specimen quality of the R-TSME group was acceptable. CONCLUSION: Tumor-specific mesorectal excision was performed safely and effectively using the da Vinci Surgical System and the perioperative outcomes were acceptable.


Asunto(s)
Laparoscopía , Neoplasias del Recto/cirugía , Robótica , Adulto , Anciano , Dolor de Espalda/etiología , Pérdida de Sangre Quirúrgica , Edema/etiología , Femenino , Humanos , Laparoscopía/efectos adversos , Tiempo de Internación , Escisión del Ganglio Linfático , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Neoplasias del Recto/patología
9.
Br J Cancer ; 98(3): 542-6, 2008 Feb 12.
Artículo en Inglés | MEDLINE | ID: mdl-18212754

RESUMEN

The present study was conducted to evaluate the efficacy and safety of a combination regimen of docetaxel plus oxaliplatin in patients with advanced gastric cancer. Patients with previously untreated metastatic or recurrent, measurable gastric cancer received intravenous docetaxel 65 mg m(-2) plus oxaliplatin 120 mg m(-2) on day 1 based on a 3-week cycle. Forty-two patients were enrolled in the current study, among whom 39 were assessable for efficacy and all assessable for toxicity. One complete response and 18 partial responses were confirmed, giving an overall response rate of 45.2% (95% confidence interval (CI); 31.7-59.7%). At a median follow-up of 7.7 months, the median time to progression and median overall survival was 5.7 (95% CI; 4.3-7.2) months and 9.9 (95% CI; 7.8-12.0) months, respectively. Grade 3/4 neutropenia occurred in 11 patients (26.1%) and febrile neutropenia was observed in four patients (9.5%). The common non-haematologic toxicity was fatigue (grade 1/2, 61.9%) and nausea (grade 1/2, 47.7%). The combination of docetaxel and oxaliplatin was found to be well tolerated and effective in patients with advanced gastric cancer.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Compuestos Organoplatinos/administración & dosificación , Neoplasias Gástricas/tratamiento farmacológico , Taxoides/administración & dosificación , Adulto , Anciano , Supervivencia sin Enfermedad , Docetaxel , Femenino , Humanos , Masculino , Persona de Mediana Edad , Oxaliplatino , Análisis de Supervivencia
10.
Bone Marrow Transplant ; 40(10): 919-24, 2007 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-17846602

RESUMEN

The current study aimed to evaluate the efficacy and toxicity of a combination of intravenous busulfan, cyclophosphamide and etoposide (i.v. Bu/Cy/E) as a conditioning regimen prior to autologous hematopoietic stem cell transplantation in patients with non-Hodgkin's lymphoma (NHL). Sixty-four patients with relapsed/refractory (n=36) or high-risk (n=28) lymphoma were enrolled. The high-dose chemotherapy consisted of i.v. Bu (0.8 mg kg(-1) i.v. q 6 h from day -7 to day -5), Cy (50 mg kg(-1) i.v. on day -3 and day -2) and E (400 mg m(-2) i.v. on day -5 and day -4). The median age was 43 (range 18-65) years, and 39 patients were male. Diffuse large B-cell lymphoma (40.6%) was the most common histological subtype. All evaluable patients achieved an engraftment of neutrophils (median, day 12) and platelets (median, day 13). Hepatic veno-occlusive disease was observed in four patients (three mild, one moderate grade), and two patients (3.1%) died from treatment-related complications. At a median follow-up of 16.4 months, 15 patients (23.4%) exhibited a relapse or progression, while 13 patients (20.3%) had died of disease. The estimated 3-year overall and progression-free survival for all patients was 72.1 and 70.1%, respectively. In conclusion, the conditioning regimen of i.v. Bu/Cy/E was well tolerated and seemed to be effective in patients with aggressive NHL.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/administración & dosificación , Trasplante de Células Madre Hematopoyéticas , Linfoma no Hodgkin/tratamiento farmacológico , Acondicionamiento Pretrasplante , Adolescente , Adulto , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Busulfano/administración & dosificación , Busulfano/efectos adversos , Ciclofosfamida/administración & dosificación , Ciclofosfamida/efectos adversos , Etopósido/administración & dosificación , Etopósido/efectos adversos , Femenino , Humanos , Masculino , Persona de Mediana Edad , Resultado del Tratamiento
11.
Bone Marrow Transplant ; 40(8): 779-84, 2007 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-17700602

RESUMEN

GVHD-specific survival (GSS) has been investigated as a potential study end point to describe the clinical course and outcome of chronic GVHD (cGVHD). However, reaching this end point requires a long observation time. We hypothesized that the time to the first flare-up (FFU) of cGVHD (TTF) can be an alternative statistical end point to GSS. This retrospective study included 96 patients with a diagnosis of cGVHD from a cohort of 119 patients with a prior history of acute GVHD. The median TTF was 73 days after the diagnosis of cGVHD. The 2-year cumulative incidences of first, second and third episodes of flare-up (FU) during courses of cGVHD were estimated as 69.5, 46.4 and 22.1%. Those patients who did not have an episode of FU of cGVHD had 96.0% of 2-years GSS rate, while those with 1 and > or =2 episodes had 50.8 and 46.8%, respectively (P=0.001). Shorter TTF was associated with poor GSS and decreased overall survival. The shorter TTF during the course of cGVHD was significantly associated with extensive cGVHD (P=0.002), Hopkins' risk category (P=0.022) and progressive-type cGVHD (P<0.001) in multivariate analysis. We propose that TTF can be an alternative end point to GSS in cGVHD trials.


Asunto(s)
Enfermedad Injerto contra Huésped/etiología , Leucemia/cirugía , Trasplante de Células Madre/efectos adversos , Adolescente , Adulto , Enfermedad Crónica , Estudios de Cohortes , Femenino , Humanos , Masculino , Persona de Mediana Edad , Valor Predictivo de las Pruebas , Pronóstico , Estudios Retrospectivos , Factores de Tiempo
12.
Bone Marrow Transplant ; 40(6): 541-7, 2007 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-17637692

RESUMEN

A regimen of busulfan and cyclophosphamide (BuCy2) is regarded as the standard myeloablative regimen for SCT. This study evaluated the hypothesis that fludarabine can replace cyclophosphamide for myeloablative allogeneic SCT. Ninety-five patients underwent allogeneic SCT from HLA-identical donors, following BuCy2 (n=55) or busulfan+fludarabine (BF, n=40). The efficacy of fludarabine compared to cyclophosphamide was retrospectively evaluated. The BF group exhibited a shorter duration until engraftment (P=0.001), lower incidence of acute and chronic GVHD (P<0.001 and P=0.003, respectively), and non-relapse mortality (NRM) (P=0.039). Furthermore, the event-free survival and overall survival were significantly higher for the BF group compared to the BuCy2 group (P=0.004 and 0.002, respectively). After adjusting for age, the risk status of disease, GVHD prophylaxis and donor type, the BF regimen was found to be an independent favorable risk factor for event-free survival (hazard ratio (HR), 0.181; 95% confidence interval, 0.045-0.720; P=0.016) and overall survival (HR, 0.168; 0.035-0.807; P=0.026). The replacement of cyclophosphamide with fludarabine for myeloablative conditioning seems to be more effective in terms of short-term NRM, and GVHD compared to BuCy2 regimen in allogeneic transplantation.


Asunto(s)
Busulfano/administración & dosificación , Ciclofosfamida/administración & dosificación , Trasplante de Células Madre Hematopoyéticas , Leucemia/terapia , Agonistas Mieloablativos/administración & dosificación , Acondicionamiento Pretrasplante/métodos , Vidarabina/análogos & derivados , Adolescente , Adulto , Arteriopatías Oclusivas/inducido químicamente , Arteriopatías Oclusivas/mortalidad , Busulfano/efectos adversos , Ciclofosfamida/efectos adversos , Infecciones por Citomegalovirus/mortalidad , Supervivencia sin Enfermedad , Femenino , Enfermedad Injerto contra Huésped/mortalidad , Trasplante de Células Madre Hematopoyéticas/efectos adversos , Trasplante de Células Madre Hematopoyéticas/mortalidad , Humanos , Incidencia , Leucemia/mortalidad , Masculino , Persona de Mediana Edad , Agonistas Mieloablativos/efectos adversos , Recurrencia , Estudios Retrospectivos , Factores de Riesgo , Tasa de Supervivencia , Acondicionamiento Pretrasplante/efectos adversos , Trasplante Homólogo , Vidarabina/administración & dosificación , Vidarabina/efectos adversos
14.
Ann Oncol ; 18(6): 1030-6, 2007 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-17426061

RESUMEN

BACKGROUND: The present study analyzed vascular endothelial growth factor (VEGF) gene polymorphisms and their impact on the prognosis for patients with gastric cancer. PATIENTS AND METHODS: Five hundred and three consecutive patients with surgically resected gastric adenocarcinoma were enrolled in the present study. The genomic DNA was extracted from paraffin-embedded tissue and four VEGF (-460T > C, -116G > A, +405G > C, and +936C > T) gene polymorphisms were determined using a polymerase chain reaction-restriction fragment length polymorphism assay. RESULTS: The survival analysis showed no association of three VEGF gene polymorphisms with the prognosis. For the +936C > T polymorphism, the T/T genotype, however, had a worse overall survival (OS) compared with the C/C genotype (P = 0.037). The -460 T/C or C/C genotype was a poor prognostic factor in patients with stage 0 or I gastric cancer (OS: hazard ratio (HR) = 3.96, disease-free survival (DFS): HR = 4.87). In the haplotype analysis, the CACC haplotype was associated with a significantly worse survival when compared with the TGGC haplotype (OS: HR = 1.72, DFS: HR = 1.73). CONCLUSIONS: VEGF gene polymorphisms were found to be an independent prognostic marker for patients with gastric cancer. Consequently, the analysis of VEGF gene polymorphisms can help identify patient subgroups at high risk of a poor disease outcome.


Asunto(s)
Polimorfismo de Nucleótido Simple , Neoplasias Gástricas/genética , Factor A de Crecimiento Endotelial Vascular/genética , Adulto , Anciano , Anciano de 80 o más Años , Cartilla de ADN , Genotipo , Humanos , Persona de Mediana Edad , Pronóstico , Neoplasias Gástricas/mortalidad , Análisis de Supervivencia , Sobrevivientes
15.
Bone Marrow Transplant ; 37(12): 1119-28, 2006 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-16699530

RESUMEN

The current study evaluates the role of quantitative measurement of peripheral lymphocyte subsets, especially CD4+ helper T-cell recovery, in predicting transplant outcomes including overall survival (OS) and non-relapse mortality (NRM) after allogeneic stem cell transplantation. A total of 69 allogeneic recipients were included with following diagnoses: acute myeloid leukemia 42, acute lymphoblastic leukemia 5, chronic myeloid leukemia 15, non-Hodgkin's lymphoma 5 and high-risk myelodysplastic syndrome 2. The peripheral lymphocyte subset counts (CD3+ T cells, CD3+4+ helper T cells, CD3+8+ cytotoxic T cells, CD19+ B cells, and CD56+ natural killer cells) were measured at 3, 6 and 12 months. The CD4+ helper T-cell reconstitution at 3 months was strongly correlated with OS (P<0.0001), NRM (P=0.0007), and opportunistic infections (P=0.0108) at the cutoff value of 200 x 10(6)/l CD4(+) helper T cells. Rapid CD4+ helper T-cell recovery was also associated with a higher CD4+ helper T-cell transplant dose (P=0.006) and donor type (P<0.001). An early CD4+ helper T-cell recovery at 3 months correlated with a subsequent faster helper T-cell recovery until 12 months, yet not with B-cell recovery. In a multivariate analysis, rapid recovery of CD4+ helper T cells at 3 months was a favorable prognostic factor together with higher CD34+ cell transplant dose in terms of OS (P=0.001) and NRM (P=0.005).


Asunto(s)
Donantes de Sangre , Linfocitos T CD4-Positivos , Neoplasias Hematológicas , Transfusión de Linfocitos , Recuperación de la Función , Trasplante de Células Madre , Adolescente , Adulto , Antígenos CD/sangre , Linfocitos B , Linfocitos T CD4-Positivos/trasplante , Supervivencia sin Enfermedad , Femenino , Neoplasias Hematológicas/sangre , Neoplasias Hematológicas/complicaciones , Neoplasias Hematológicas/mortalidad , Neoplasias Hematológicas/terapia , Humanos , Recuento de Linfocitos , Masculino , Persona de Mediana Edad , Infecciones Oportunistas/sangre , Infecciones Oportunistas/etiología , Trasplante de Células Madre/mortalidad , Factores de Tiempo , Trasplante Homólogo , Resultado del Tratamiento
16.
Br J Cancer ; 94(10): 1407-11, 2006 May 22.
Artículo en Inglés | MEDLINE | ID: mdl-16641916

RESUMEN

The present study was conducted to evaluate the efficacy and safety of a combination regimen of capecitabine plus irinotecan in patients with advanced gastric cancer. Patients with previously untreated metastatic or recurrent, measurable gastric cancer received oral capecitabine 1000 mg m(-2) twice daily from day 1 to 14 and intravenous irinotecan 100 mg m(-2) on days 1 and 8, based on a 3-week cycle. Forty-one patients were enrolled in the current study, among whom 38 were assessable for efficacy and 40 assessable for toxicity. Three complete responses and 16 partial responses were confirmed, giving an overall response rate of 46.3%. At a median follow-up of 269 days, the median time to progression and overall survival were 5.1 and 8.6 months, respectively. Grade 3/4 neutropenia occurred in four patients and grade 3 febrile neutropenia was observed in two patients. Grade 3 diarrhoea and grade 2 hand-foot syndrome occurred in six patients and eight patients, respectively. The combination of capecitabine and irinotecan was found to be well tolerated and effective in patients with advanced gastric cancer. Accordingly, this regimen can be regarded as one of first-line treatment options for advanced gastric cancer.


Asunto(s)
Adenocarcinoma/tratamiento farmacológico , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Neoplasias Gástricas/tratamiento farmacológico , Adenocarcinoma/mortalidad , Adenocarcinoma/secundario , Adulto , Anciano , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Camptotecina/administración & dosificación , Camptotecina/efectos adversos , Camptotecina/análogos & derivados , Capecitabina , Desoxicitidina/administración & dosificación , Desoxicitidina/efectos adversos , Desoxicitidina/análogos & derivados , Relación Dosis-Respuesta a Droga , Femenino , Fluorouracilo/análogos & derivados , Humanos , Irinotecán , Neoplasias Hepáticas/tratamiento farmacológico , Neoplasias Hepáticas/mortalidad , Neoplasias Hepáticas/secundario , Masculino , Persona de Mediana Edad , Neoplasias Ováricas/tratamiento farmacológico , Neoplasias Ováricas/mortalidad , Neoplasias Ováricas/secundario , Neoplasias Peritoneales/tratamiento farmacológico , Neoplasias Peritoneales/mortalidad , Neoplasias Peritoneales/secundario , Neoplasias Gástricas/mortalidad , Neoplasias Gástricas/patología , Tasa de Supervivencia
17.
Bone Marrow Transplant ; 37(7): 699-708, 2006 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-16501588

RESUMEN

This study attempts to identify variables that can predict the development of progressive- or quiescent-type chronic GVHD (pq cGVHD) and transplant outcomes after the diagnosis of cGVHD in 99 patients who experienced acute GVHD (aGVHD) after allogeneic SCT. The prognostic significance of various clinical parameters at diagnosis of cGVHD was examined to determine the prognostic factors for GVHD-specific survival (GSS) in patients with pq cGVHD. Among 118 patients who experienced any degree of aGVHD, 99 were evaluated for cGVHD. The incidence of overall and extensive pq cGVHD at 2 years was estimated as 84.4 and 63.1%, respectively. A multivariate analysis showed that severe aGVHD (grade 3, 4) (P=0.022), primary treatment failure (P=0.009) and elevated alkaline phosphatase (P=0.001) were all significant independent factors predicting a higher overall incidence of pq cGVHD. The GSS and probability of systemic immunosuppressive treatment at 2 years after diagnosis of cGVHD were estimated as 55.9 and 51.9%. GVHD-specific survival was significantly associated with performance status (P=0.004) and lymphocytopenia (

Asunto(s)
Enfermedad Injerto contra Huésped/terapia , Trasplante de Células Madre , Enfermedad Aguda , Adolescente , Adulto , Enfermedad Crónica , Estudios de Cohortes , Progresión de la Enfermedad , Femenino , Enfermedad Injerto contra Huésped/diagnóstico , Humanos , Masculino , Persona de Mediana Edad , Valor Predictivo de las Pruebas , Modelos de Riesgos Proporcionales , Estudios Retrospectivos , Factores de Riesgo , Hermanos , Trasplante de Células Madre/efectos adversos , Tasa de Supervivencia , Donantes de Tejidos , Acondicionamiento Pretrasplante , Trasplante Homólogo , Resultado del Tratamiento
18.
Ann Hematol ; 85(4): 257-62, 2006 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-16416337

RESUMEN

The addition of rituximab to cyclophosphamide, doxorubicin, vincristine, and prednisone (CHOP) has been shown to improve the outcome in all age groups with newly diagnosed diffuse large B-cell lymphoma (DLBCL). We conducted a retrospective analysis to evaluate the impact of this combination therapy on DLBCL outcomes in Korea. From October 2001 to June 2004, newly diagnosed DLBCL patients in nine Korean institutes were included. All of these 81 patients were treated with three or more cycles of rituximab plus CHOP (R-CHOP) combination chemotherapy (R group), and followed for a minimum of 12 months. For comparison, a historical cohort of patients was used and analyzed for "Clinicopathologic characteristics of Korean non-Hodgkin's lymphomas (NHLs) based on Revised American Lymphoma (REAL) classification" in 1999. Among the 1,098 NHL patients, the data of 214 DLBCL patients, who were treated with CHOP chemotherapy in first-line, were analyzed (C group). We compared outcomes between the C group and the R group. A total of 295 patients were evaluated (C group, 214; R group, 81). The complete response (CR) rate was higher in R group (73 vs 91%, p=0.001). The 2-year event-free survival (EFS) rate was significantly higher in R group (78 vs 85%, p=0.0194). This survival benefit was maintained in high-risk patients according to the international prognostic index (IPI) (p=0.0039), regardless of age. However, there was no significant difference in low-risk patients. The addition of rituximab to CHOP combination chemotherapy for DLBCLs showed improved outcomes, particularly in high-risk group according to the IPI. Long-term follow-up results will be needed to confirm these results.


Asunto(s)
Anticuerpos Monoclonales/administración & dosificación , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Linfoma de Células B/tratamiento farmacológico , Linfoma de Células B Grandes Difuso/tratamiento farmacológico , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Anticuerpos Monoclonales de Origen Murino , Protocolos de Quimioterapia Combinada Antineoplásica/normas , Estudios de Cohortes , Ciclofosfamida/administración & dosificación , Ciclofosfamida/normas , Ciclofosfamida/uso terapéutico , Interpretación Estadística de Datos , Supervivencia sin Enfermedad , Relación Dosis-Respuesta a Droga , Doxorrubicina/administración & dosificación , Doxorrubicina/normas , Doxorrubicina/uso terapéutico , Esquema de Medicación , Femenino , Humanos , Infusiones Intravenosas , Corea (Geográfico) , Linfoma de Células B/diagnóstico , Linfoma de Células B/radioterapia , Linfoma de Células B Grandes Difuso/diagnóstico , Linfoma de Células B Grandes Difuso/radioterapia , Masculino , Persona de Mediana Edad , Análisis Multivariante , Estadificación de Neoplasias , Prednisona/administración & dosificación , Prednisona/normas , Prednisona/uso terapéutico , Análisis de Regresión , Estudios Retrospectivos , Rituximab , Análisis de Supervivencia , Resultado del Tratamiento , Vincristina/administración & dosificación , Vincristina/normas , Vincristina/uso terapéutico
19.
Bone Marrow Transplant ; 37(1): 101-8, 2006 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-16258533

RESUMEN

Thrombocytopenia (TP) is a frequent complication after allogeneic stem cell transplantation (SCT) and regarded as a poor prognostic factor when assessed beyond day 100. However, little is known about the clinical significance of the platelet recovery pattern before chronic graft-versus-host disease (GVHD) develops. Eighty-five patients undergoing HLA-identical sibling SCT were stratified according to their platelet recovery pattern between day +30 and +90 and the transplant outcomes analyzed, along with the association of each component of the acute GVHD grading system. Fifteen patients (18%) were classified with persistent TP, 33 patients (39%) with unstable TP, and 37 patients (43%) as non-TP. Persistent TP, which was strongly associated with severe acute GVHD (P<0.001), exhibited the worst 2-year OS (P<0.0001) and highest NRM (P<0.0001) and opportunistic infection rates (P<0.0001). In multivariate analyses, the platelet recovery pattern was identified as an independent prognostic factor (P=0.02) together with the disease risk (P=0.02) in terms of OS, and the only independent prognostic factor in terms of NRM (P=0.005) and the incidence of infectious events (P<0.001). Persistent TP was strongly associated with the development of extensive chronic GVHD (P=0.03). The platelet recovery pattern between day +30 and +90 can be used to predict the prognosis of SCT recipients.


Asunto(s)
Plaquetas , Donadores Vivos , Trastornos Linfoproliferativos/mortalidad , Recuperación de la Función , Trasplante de Células Madre , Trombocitopenia/mortalidad , Adolescente , Adulto , Enfermedad Crónica , Femenino , Enfermedad Injerto contra Huésped/etiología , Enfermedad Injerto contra Huésped/mortalidad , Enfermedad Injerto contra Huésped/prevención & control , Prueba de Histocompatibilidad , Humanos , Trastornos Linfoproliferativos/complicaciones , Trastornos Linfoproliferativos/terapia , Masculino , Persona de Mediana Edad , Infecciones Oportunistas/etiología , Infecciones Oportunistas/mortalidad , Pronóstico , Hermanos , Trombocitopenia/etiología , Trasplante Homólogo
20.
Br J Cancer ; 93(10): 1117-21, 2005 Nov 14.
Artículo en Inglés | MEDLINE | ID: mdl-16251869

RESUMEN

We aimed to evaluate the efficacy and safety of concurrent chemoradiotherapy with capecitabine and cisplatin in patients with locally advanced squamous cell carcinoma of the head and neck (SCCHN). In total, 37 patients with stage III or IV SCCHN were enrolled on the study. The chemotherapy consisted of two cycles of intravenous cisplatin of 80 mg m(-2) on day 1 and oral capecitabine 825 mg m(-2) twice daily from day 1 to day 14 at 3-week intervals. The radiotherapy (1.8-2.0 Gy 1 fraction day(-1) to a total dose of 70-70.2 Gy) was delivered to the primary tumour site and neck. The primary tumour sites were as follows: oral cavity (n=6), oropharynx (n=11), hypopharynx (n=8), larynx (n=3), nasopharynx (n=6), and paranasal sinus (n=3). After the chemoradiotherapy, 29 complete responses (78.4%) and 6 partial responses (16.2%) were confirmed. Grade 3 or 4 neutropenia occurred only in two patients, plus grade 3 febrile neutropenia was observed only in one patient. At a median follow-up duration of 19.8 months, the estimated overall survival and progression-free survival rate at 2-year was 76.8 and 57.9%, respectively. Concurrent chemoradiotherapy with capecitabine and cisplatin was found to be well tolerated and effective in patients with locally advanced SCCHN.


Asunto(s)
Carcinoma de Células Escamosas/tratamiento farmacológico , Carcinoma de Células Escamosas/patología , Cisplatino/uso terapéutico , Desoxicitidina/análogos & derivados , Neoplasias de Cabeza y Cuello/tratamiento farmacológico , Neoplasias de Cabeza y Cuello/patología , Adulto , Anciano , Capecitabina , Cisplatino/efectos adversos , Desoxicitidina/efectos adversos , Desoxicitidina/uso terapéutico , Progresión de la Enfermedad , Quimioterapia Combinada , Femenino , Fluorouracilo/análogos & derivados , Humanos , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Tasa de Supervivencia
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA
...