Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 205
Filtrar
Mais filtros

Base de dados
País/Região como assunto
Tipo de documento
Intervalo de ano de publicação
1.
Hum Reprod ; 34(6): 1083-1094, 2019 06 04.
Artigo em Inglês | MEDLINE | ID: mdl-31116405

RESUMO

STUDY QUESTION: How efficacious is transplantation of ovarian cortex previously exposed to chemotherapy? SUMMARY ANSWER: Prior exposure to chemotherapy did not disrupt the function of cryopreserved ovarian tissue after transplantation. WHAT IS KNOWN ALREADY: Ovarian tissue cryopreservation (OTC) followed by ovarian tissue transplantation (OTT) is an efficacious technique for restoration of female fertility. At least 130 children have been born following this procedure. To date, little is known about the efficacy of OTT in patients exposed to cancer chemotherapy prior to OTC. STUDY DESIGN, SIZE, DURATION: This study evaluates the recovery of ovarian function and fertility in 31 consecutive patients who had received OTT, between 2005 and 2015. PARTICIPANTS/MATERIALS, SETTING, METHODS: Thirty one patients, wanting children, were transplanted with autologous ovarian cortex, among which 22 patients (71%) had been exposed to chemotherapy before OTC. Recovery of ovarian function was considered total once menstruation occurred. Ovarian function recovery (OFR), ovarian graft survival, and incidence of pregnancy were related to previous chemotherapy exposure, type of chemotherapy and graft characteristics (number of grafted fragments and follicular density). MAIN RESULTS AND ROLE OF CHANCE: The amount of ovarian tissue collected was the only parameter to show any significant change between patients with versus without previous chemotherapy. At 1 year after OTT, the cumulative incidence of OFR was 83% (93% in patients exposed to chemotherapy and 67% in others (P = 0.14)). A low follicular density (<0.3 foll/mm2) in the transplant and a low number of grafted fragments (<16) were significantly associated with a delayed OFR. Graft survival at 2 years after OTT was 77%. It was significantly lower in patients exposed to bifunctional alkylating agents before ovarian cryopreservation and in patients with a low follicular density. The proportion of women who succeeded in having at least one live birth was 23% in the total population, 0% (0/9) in the group 'no previous chemotherapy', and 32% (7/22) in the group 'previous chemotherapy'. The cumulative incidence of pregnancy (Kaplan-Meier) at 3 years after OTT was 36% overall and 49% in case of previous chemotherapy, with no difference related to previous chemotherapy exposure. In total there were 13 pregnancies and 8 births in 7 patients. LIMITATIONS, REASONS FOR CAUTION: The pathology in the two groups of patients was not comparable. In the group of patients who had chemotherapy before OTC, there were 95% of hematological malignancies. In the group of patients who did not have chemotherapy before OTC only 1 out of 9 patients had a malignant hematological disease while 44% had some pathology affecting the ovaries. Few women are available for study and only large changes are likely to have statistical significance. WIDER IMPLICATIONS OF THE FINDINGS: These results suggest that prior cancer chemotherapy should no longer be considered a limitation to cryopreservation of ovarian tissue and current recommendations in this regard should be revised. STUDY FUNDING/COMPETING INTEREST(S): This study was supported by the Agence de la Biomédecine (France's biomedical office). There are no competing interests to report. TRIAL REGISTRATION NUMBER: NCT02184806.


Assuntos
Antineoplásicos Alquilantes/efeitos adversos , Criopreservação , Preservação da Fertilidade/métodos , Neoplasias/tratamento farmacológico , Ovário/transplante , Adolescente , Adulto , Autoenxertos/efeitos dos fármacos , Autoenxertos/fisiologia , Autoenxertos/transplante , Coeficiente de Natalidade , Sobreviventes de Câncer/estatística & dados numéricos , Feminino , Sobrevivência de Enxerto , Humanos , Nascido Vivo , Menstruação/fisiologia , Ovário/efeitos dos fármacos , Ovário/fisiologia , Gravidez , Recuperação de Função Fisiológica/efeitos dos fármacos , Fatores de Tempo , Transplante Autólogo/métodos , Resultado do Tratamento , Adulto Jovem
2.
Ann Oncol ; 25(11): 2224-2229, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-25193988

RESUMO

BACKGROUND: The aim of this study was to investigate the impact of the high-dose regimen on the outcome of patients with follicular lymphoma (FL) having had autologous stem-cell transplantation (ASCT) in a recent time period. PATIENTS: Between 1995 and 2007, 2233 patients with FL had their first ASCT with either a total body irradiation (TBI)-containing regimen or carmustin, etoposide, cytarabine and melphalan (BEAM), of which 47% were autografted in first remission. RESULTS: After a median observation time of 73 months (interquartile range 30-107), 5- and 10-year non-relapse mortality (NRM) was similar (6% and 10% in both groups). No significant NRM differences became evident after multivariate adjustment for confounders. Secondary malignancies were observed in 9.7% and 7.9% of the patients after TBI and BEAM (P = 0.19), which were treatment-related myelodysplastic syndromes/acute myelogenous leukaemia (t-MDS/AML) in 3.4% and 2.8% (P = 0.57). The median time to t-MDS/AML was around 50 months in both groups. Because of a lower relapse incidence, TBI was associated with better event-free survival reaching statistical significance in the patients transplanted in first remission but not in those transplanted beyond first remission. CONCLUSIONS: In patients with FL who received TBI-based ASCT after 1995 increased NRM and t-MDS/AML risks did not emerge compared with BEAM while disease control was at least equivalent.


Assuntos
Linfoma Folicular/tratamento farmacológico , Linfoma Folicular/radioterapia , Recidiva Local de Neoplasia/tratamento farmacológico , Recidiva Local de Neoplasia/radioterapia , Adolescente , Adulto , Idoso , Anticorpos Monoclonais Murinos/administração & dosagem , Anticorpos Monoclonais Murinos/efeitos adversos , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Carmustina/administração & dosagem , Carmustina/efeitos adversos , Terapia Combinada , Citarabina/administração & dosagem , Citarabina/efeitos adversos , Intervalo Livre de Doença , Feminino , Humanos , Linfoma Folicular/patologia , Masculino , Melfalan/administração & dosagem , Melfalan/efeitos adversos , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/patologia , Podofilotoxina/administração & dosagem , Podofilotoxina/efeitos adversos , Indução de Remissão , Rituximab , Transplante de Células-Tronco , Transplante Autólogo , Irradiação Corporal Total , Adulto Jovem
4.
Leukemia ; 21(9): 1907-14, 2007 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-17611565

RESUMO

Fifty-four percent of adults with acute lymphoblastic leukemia (ALL) who entered the LALA-94 trial experienced a first relapse. We examined the outcome of these 421 adult patients. One hundred and eighty-seven patients (44%) achieved a second complete remission (CR). The median disease-free survival (DFS) was 5.2 months with a 5-year DFS at 12%. Factors predicting a better outcome after relapse were any transplant performed in second CR (P<0.0001), a first CR duration >1 year (P=0.04) and platelet level >100 x 10(9)/l at relapse (P=0.04). Risk groups defined at diagnosis and treatment received in first CR did not influence the outcome after relapse. The best results were obtained in a subset of patients who were eligible for allogeneic stem cell transplantation (SCT). Geno-identical allogeneic SCT was performed in 55 patients, and 3 patients received donor lymphocyte infusions. Forty-four transplantations were performed from an unrelated donor (of which four were cord blood). We conclude that most adult patients with recurring ALL could not be rescued using current available therapies, although allogeneic SCT remains the best therapeutic option.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Transplante de Células-Tronco Hematopoéticas , Leucemia-Linfoma Linfoblástico de Células Precursoras/tratamento farmacológico , Leucemia-Linfoma Linfoblástico de Células Precursoras/mortalidade , Adolescente , Adulto , Terapia Combinada , Intervalo Livre de Doença , Estudos de Viabilidade , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico , Recidiva , Indução de Remissão , Fatores de Risco , Transplante Homólogo , Resultado do Tratamento
5.
Mycoses ; 51(3): 270-2, 2008 May.
Artigo em Inglês | MEDLINE | ID: mdl-18399909

RESUMO

Disseminated Geotrichum capitatum infection is uncommon, and has been reported exclusively in immunocompromised patients. The prognosis is poor with a mortality rate of approximately 50-75%. We report a case of disseminated G. capitatum infection in a severely neutropenic patient who was receiving chemotherapy for acute myeloblastic leukaemia. G. capitatum was isolated from blood cultures, skin lesions, bronchoalveolar lavage fluid, throat swabs and stools. The infection was successfully cured with a combination of voriconazole and caspofungin.


Assuntos
Equinocandinas/uso terapêutico , Geotricose/tratamento farmacológico , Geotrichum/isolamento & purificação , Hospedeiro Imunocomprometido , Pirimidinas/uso terapêutico , Triazóis/uso terapêutico , Antifúngicos/uso terapêutico , Caspofungina , Combinação de Medicamentos , Geotricose/diagnóstico , Geotricose/imunologia , Humanos , Lipopeptídeos , Masculino , Pessoa de Meia-Idade , Voriconazol
6.
J Clin Invest ; 101(10): 2290-6, 1998 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-9593785

RESUMO

Human chronic myelogenous leukemia (CML) is characterized by a translocation between chromosomes 9 and 22 that results in a BCR-ABL fusion gene coding for chimeric proteins. The junctional region of the BCR-ABLb3a2 molecule represents a potential leukemia-specific antigen which could be recognized by cytotoxic T lymphocytes (CTL). In fact, we identified a junctional nonapeptide (SSKALQRPV) which binds to HLA-A2.1 molecules. This peptide, as well as those binding to HLA-A3, -A11, and -B8 molecules (previously identified by others), elicits primary CTL responses in vitro from PBLs of both healthy donors and CML patients. Such CTL recognize HLA-matched, BCR-ABL-positive leukemic cells, implying efficient natural processing and presentation of these junctional peptides. Specific CTL were found at high frequency in 5 of 21 CML patients, suggesting that these epitopes are, to some extent, immunogenic in vivo during the course of the disease. These peptides could be useful for the development of specific immunotherapy in CML patients.


Assuntos
Proteínas de Fusão bcr-abl/imunologia , Linfócitos T Citotóxicos/metabolismo , Ligação Competitiva , Sobrevivência Celular/imunologia , Epitopos/química , Epitopos/imunologia , Proteínas de Fusão bcr-abl/genética , Antígenos HLA-A/imunologia , Antígenos HLA-A/metabolismo , Humanos , Leucemia Mielogênica Crônica BCR-ABL Positiva , Complexo Principal de Histocompatibilidade/imunologia , Fragmentos de Peptídeos/imunologia , Fragmentos de Peptídeos/uso terapêutico , Ligação Proteica/imunologia , Proteínas Recombinantes de Fusão/imunologia , Células Tumorais Cultivadas
7.
Leukemia ; 20(5): 793-9, 2006 May.
Artigo em Inglês | MEDLINE | ID: mdl-16541140

RESUMO

Chronic myeloid leukemia (CML) relapse after allogeneic stem cell transplantation (SCT) is a relatively frequent situation, which is correlated to disease status, time from diagnosis to transplant and T-cell depletion. We evaluated the potential for early minimal residual disease (MRD) BCR-ABL quantification to predict relapse of CML patients receiving allogeneic SCT. Minimal residual disease was analyzed by real-time quantitative reverse transcriptase-polymerase chain reaction (RQ-PCR) at day 100 (d100) in 38 patients with >1 year follow-up after conventional non-T-cell-depleted SCT. Normal ABL control values from 1724 follow-up blood samples were used to define an RQ-PCR amplifiability index and the limits of reliable use of BCR-ABL ratios. We then compared the 14 patients with a high-level d100 BCR-ABL/ABL ratio (> or = 10(-4)) to that of the 24 patients with a negative/low-level ratio (<10(-4)). Despite being comparable for all classical parameters, the incidence of relapse was significantly higher in the high MRD group (11/14 (79%)) compared to that of the low/negative MRD group (7/24 (29%)) (P = 0.009), with d100 MRD values representing an independent risk factor of relapse and disease-free survival, but not of overall survival, in multivariate analysis. These data should facilitate risk-adapted post-transplant immunosuppression and/or tyrosine kinase inhibitor therapy based on an early evaluation of MRD.


Assuntos
Proteínas de Fusão bcr-abl/genética , Leucemia Mielogênica Crônica BCR-ABL Positiva/genética , Leucemia Mielogênica Crônica BCR-ABL Positiva/terapia , Transplante de Células-Tronco/efeitos adversos , Adolescente , Adulto , DNA Complementar/genética , Feminino , Seguimentos , Humanos , Células K562 , Leucemia Mielogênica Crônica BCR-ABL Positiva/diagnóstico , Masculino , Pessoa de Meia-Idade , Valor Preditivo dos Testes , RNA/genética , Recidiva , Reação em Cadeia da Polimerase Via Transcriptase Reversa/métodos , Fatores de Risco , Sensibilidade e Especificidade , Taxa de Sobrevida , Transplante Homólogo , Resultado do Tratamento
8.
Leukemia ; 20(2): 336-44, 2006 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-16357838

RESUMO

To evaluate the results of autologous stem cell transplantation (ASCT) in a large population of adults with acute lymphoblastic leukemia (ALL) in first complete remission (CR), we performed an individual data-based overview of the last three trials from the LALA group. Overall, 349 patients with ALL prospectively randomized in the consecutive LALA-85, -87, and -94 trials to receive either ASCT or chemotherapy as post-CR treatment were analyzed. Eligibility criteria were 15-50-year-old patients without sibling donors in both LALA-85/87 trials and 15-55-year-old patients with high-risk ALL and no sibling donors in the LALA-94 trial. Intent-to-treat analysis, which compared 175 patients from the ASCT arm to 174 patients from the chemotherapy arm, showed that ASCT was associated with a lower cumulative incidence of relapse (66 vs 78% at 10 years; P=0.05), without significant gain in disease-free or overall survival. Despite a possible lack of statistical power, a nested case-control analysis performed in 85 patient pairs adjusted for time to transplant and prognostic covariates confirmed these intent-to-treat results in patients actually transplanted. Of interest, the reduced relapse risk after ASCT translated in better disease-free survival in the 300 rapid responders who reached CR after the first induction course.


Assuntos
Transplante de Células-Tronco de Sangue Periférico , Leucemia-Linfoma Linfoblástico de Células Precursoras/terapia , Adulto , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Intervalo Livre de Doença , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Leucemia-Linfoma Linfoblástico de Células Precursoras/diagnóstico , Leucemia-Linfoma Linfoblástico de Células Precursoras/tratamento farmacológico , Estudos Prospectivos , Recidiva , Indução de Remissão , Fatores de Risco , Análise de Sobrevida , Transplante Autólogo
9.
Leukemia ; 20(12): 2155-61, 2006 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-17039234

RESUMO

Adult patients with acute lymphoblastic leukemia (ALL) and t(1;19)/E2A-PBX1 or t(4;11)/MLL-AF4 have a poor outcome. We have evaluated the impact of an intensified post-remission therapy using a high-dose chemotherapy course followed by allogeneic or autologous SCT on the outcome of 58 patients with t(1;19)/E2A-PBX1 (E2A group, n=24) or t(4;11)/MLL-AF4 (MLL group, n=34) treated in the LALA-94 multicenter prospective study. Patients in the MLL group had higher WBC counts and more frequent DIC. CR rates achieved by MLL and E2A groups were similar to other B-cell ALL (87, 82 and 86% respectively). While in CR, patients with a donor were assigned to alloSCT (n=22), the remaining patients with were randomized between autoSCT (n=15) or chemotherapy (n=8). Five-year overall survival was 31 and 45% for E2A and MLL groups, respectively. In both groups, DFS was higher in the alloSCT arm as compared to autoSCT and chemotherapy arms. The results of this study show that chemotherapy intensification did not overcome the poor prognosis of adults with t(1;19)/E2A-PBX1. Allogeneic SCT should thus be offered in first CR to patients with t(1;19)/E2A-PBX1 or t(4;11)/MLL-AF4. New therapeutic approaches are needed for patients without donor.


Assuntos
Linfoma de Burkitt/genética , Linfoma de Burkitt/terapia , Transplante de Células-Tronco Hematopoéticas , Translocação Genética , Adolescente , Adulto , Fatores de Transcrição Hélice-Alça-Hélice Básicos/genética , Cromossomos Humanos Par 1/genética , Cromossomos Humanos Par 11/genética , Cromossomos Humanos Par 19/genética , Cromossomos Humanos Par 4/genética , Proteínas de Ligação a DNA/genética , Feminino , Histona-Lisina N-Metiltransferase , Humanos , Masculino , Pessoa de Meia-Idade , Proteína de Leucina Linfoide-Mieloide/genética , Proteínas Nucleares/genética , Fator de Transcrição 1 de Leucemia de Células Pré-B , Estudos Prospectivos , Proteínas Proto-Oncogênicas/genética , Fatores de Elongação da Transcrição , Transplante Homólogo
10.
Rev Mal Respir ; 24(2): 145-54, 2007 Feb.
Artigo em Francês | MEDLINE | ID: mdl-17347602

RESUMO

The high frequency of pulmonary complications of haematological malignancy and the increasing number of patients treated for these disorders make it important that the respiratory physician has a structured diagnostic approach according to: 1 the immune deficiency due to the malignancy and/or the treatment administered; 2 the factors that can modify the risk of infection (anti infection prophylaxis and/or pre-emptive treatment); 3 co-morbidities; 4 extra-pulmonary manifestations. Two main situations can be identified: The patient is aplasic: Initially the pneumonias are predominantly of bacterial origin but may be fungal if the neutropenia is prolonged. The respiratory physician is faced with two problems: 1 the diagnosis of pneumonia; this may be helped by CT scanning; 2 The choice of antibiotics; this will depend on previous investigations. The patient is not aplasic: The lung disease may have many causes, mainly infectious but also drug related, tumoral, haemorrhagic or embolic. The main problem is the correct choice of investigations to establish an aetiological diagnosis. The collection of data according to a pre-established protocol based on simple factors (study of the notes and clinical examination) is one of the key elements for improving the prognosis of these patients whose management should be multidisciplinary following a pre-defined plan.


Assuntos
Neoplasias Hematológicas/complicações , Pneumopatias/diagnóstico , Pneumopatias/etiologia , Humanos
11.
Cancer Radiother ; 21(5): 365-372, 2017 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-28532617

RESUMO

PURPOSE: Dynamic conformal radiotherapy with helical TomoTherapy® (HT) offers a more quantitative paradigm for total body irradiation. Treatment planning, delivery, dose verification of the first French experiences of total body irradiation using helical TomoTherapy® are presented. MATERIALS AND METHODS: Patients planned for total body irradiation at our institution from February 2012 to May 2013 were reported. Total body irradiation consisted in a single fraction of 2Gy. Planning target volume was divided in two due to the limited translation length of the table. Delivery quality assurance was performed with cylindrical phantom, ionization chamber and films. Thermoluminescent dosimeters and radiochromic films were used for in vivo dosimetry and junction region heterogeneity assessment. RESULTS: Six patients were included. One finally did not receive the treatment but dosimetric data were analyzed. Planned V95% was covered by D95% and V2% did not exceed D107% for five of the six patients. The mean relative difference between measured and calculated absolute dose of the Delivery quality assurance was always less than 2.5% (mean value±SD: 1%±0.67%). Gamma index (3%; 3mm) was less than 1 for at least 93% of the points (value±SD: 97.4±1.6% and 96.6±2.5% for upper and lower part of treatment respectively). Difference between in vivo measured and calculated dose was above 5% for only two out of 15 points (maximum: 10.2%, mean: 0.73±4.6%). Junction region heterogeneity was in average 5.8±1%. The total treatment session of total body irradiation lasted 120min, with a mean beam on time of 17.2±0.6 and 11.2±1.6min for upper and lower part of the body respectively. CONCLUSION: Total body irradiation using helical TomoTherapy® guaranteed high dose homogeneity throughout the body and dose verification was achievable, showing small difference between planned and delivered doses.


Assuntos
Neoplasias/radioterapia , Radioterapia de Intensidade Modulada , Irradiação Corporal Total , Adulto , Idoso , Feminino , França , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Adulto Jovem
12.
Transfus Clin Biol ; 24(2): 76-82, 2017 Jun.
Artigo em Francês | MEDLINE | ID: mdl-28476210

RESUMO

The not-for-profit issue has been debated in November 2016 in Paris; this issue is one of the four canonical pillars of ethical blood donation. It is intimately bound to benevolence though it is distinct, as not-for-profit calls for institutions while benevolence calls for individuals. It is indeed intended that voluntary blood donors do not benefit from their donation and are thus non-remunerated. Not-for-profit is essential since it refers to the public character of blood as a putative public resource aimed at being shared as a tribute of solidarity. A central question however is linked to the capacity- or not -of public sectors to ensure that blood components are universally available, with special mention to plasma derived drugs, without the contribution of the for profit, private sector.


Assuntos
Beneficência , Doadores de Sangue/ética , Transfusão de Sangue/ética , Academias e Institutos , França , Humanos , Motivação
13.
J Natl Cancer Inst ; 76(6): 1317-9, 1986 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-3520075

RESUMO

Peripheral blood lymphocytes (PBL) and epidermal cells (EC) of 44 patients to be grafted with bone marrow from an HLA-identical sibling have been used as stimulator cells in primary cultures with effector PBL of one or several potential donors. Proliferative responses against PBL did not differ from those obtained with effector cells cultured in medium alone, whereas EC induced clearly positive proliferation in 21/53 (40%) of the pairs tested. Evaluation of 30 patients followed for more than 3 months after the graft shows that a high level of response in the mixed epidermal cell lymphocyte reaction is directly correlated with the incidence of acute graft-versus-host disease.


Assuntos
Transplante de Medula Óssea , Epiderme/imunologia , Doença Enxerto-Hospedeiro/etiologia , Teste de Histocompatibilidade/métodos , Leucemia/terapia , Linfócitos/imunologia , Doença Aguda , Doença Enxerto-Hospedeiro/imunologia , Antígenos HLA/imunologia , Humanos
14.
Transfus Clin Biol ; 23(3): 168-74, 2016 Sep.
Artigo em Francês | MEDLINE | ID: mdl-27424281

RESUMO

Voluntariness stands for one of the four pillars of ethics in blood donation; it is, however, more related to tradition than to legislation. Because it seems necessary to apply "marketing" techniques to blood collection in order to meet the needs in blood components, both in terms of quantity and quality, one wonders if this may be at the expense of this principle of voluntariness. This seminar-belonging actually to a series of seminars in Ethics in Transfusion Medicine-aimed at questioning the possible weakness of voluntariness in the field of blood donation. To achieve this goal, specialists of numerous disciplines in medical sciences, law and humanities gathered to discuss all related issues to voluntariness in blood donation.


Assuntos
Doadores de Sangue/ética , Medicina Transfusional/ética , Voluntários , Altruísmo , Atitude Frente a Saúde , Doadores de Sangue/legislação & jurisprudência , Doadores de Sangue/psicologia , Segurança do Sangue , Transfusão de Sangue/economia , Transfusão de Sangue/ética , Transfusão de Sangue/legislação & jurisprudência , Necessidades e Demandas de Serviços de Saúde , Humanos , Motivação , Comunicação Persuasiva , Poder Psicológico , Remuneração , Valores Sociais
15.
Biochim Biophys Acta ; 492(2): 426-32, 1977 Jun 24.
Artigo em Inglês | MEDLINE | ID: mdl-884140

RESUMO

A hemoglobin of high electrophoretic mobility was detected in a French male suffering from an acute leukemia; this hemoglobin was also present in his family. The variant was unstable and possessed an abnormal beta chain, in which a glycyl residue in position 64 (E8) was replaced by an aspartyl residue. This variant constitutes a new case of Hb J Calabria. Since the substituted E8 residue is in close spatial contact with that at B6, it was of interest to compare the properties of Hb J Calabria with those of other hemoglobins bearing substitutions at the same site.


Assuntos
Hemoglobina J , Hemoglobinas Anormais , Leucemia/sangue , Adulto , Idoso , Aminoácidos/análise , Ácido Aspártico , Feminino , Glicina , Hemoglobina J/fisiologia , Hemoglobinas Anormais/fisiologia , Heterozigoto , Humanos , Focalização Isoelétrica , Masculino , Oxigênio/sangue , Fragmentos de Peptídeos/análise
16.
J Clin Oncol ; 6(2): 227-31, 1988 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-3276822

RESUMO

Twenty-seven patients ranging in age from 15 to 36 years participated in a pilot study, and underwent allogeneic bone marrow transplantation (BMT) for acute lymphoblastic leukemia (ALL) in first complete remission (CR) in four French centers. All patients were grafted from human leukocyte antigen/mixed leukocyte culture (HLA/MLC) identical sibling after conditioning regimen consisting of cyclophosphamide and total body irradiation (TBI). Sixteen patients are alive in persistent first remission, with a median follow-up of 56 months (range, 41 to 82 months). The 6-year Kaplan-Meier probability of disease-free survival (DFS) is 59%. Only three patients relapsed (5, 7, and 7 months after transplantation). These interesting results have led us to propose, in accord with a French multicentric protocol, allogeneic BMT for adults under 40 years of age during the first CR of ALL.


Assuntos
Transplante de Medula Óssea , Leucemia Linfoide/terapia , Adolescente , Adulto , Azatioprina/uso terapêutico , Doença Enxerto-Hospedeiro/tratamento farmacológico , Humanos , Leucemia Linfoide/imunologia , Leucemia Linfoide/patologia , Projetos Piloto , Prognóstico
17.
J Clin Oncol ; 12(12): 2580-7, 1994 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-7989932

RESUMO

PURPOSE: Optimal postremission therapy remains controversial in adult patients with acute lymphoblastic leukemia (ALL). In a large multicentric trial (LALA87), we compared allogeneic bone marrow transplantation (BMT) with other postremission therapies (chemotherapy or autologous transplantation) using the result of the human leukocyte antigen (HLA) typing as a random allocation. PATIENTS AND METHODS: Patient eligibility requirements were as follows: (1) inclusion in LALA87 trial, (2) complete response to induction or salvage therapy, (3) age 15 to 40 years, and (4) at least one potential sibling donor. Patients with an HLA-identical sibling were assigned to the BMT group, while patients without a sibling donor constituted the control group. Allogeneic transplantation was scheduled for patients in the BMT group; in the control group, patients were randomly allocated to receive chemotherapy or autologous transplantation. RESULTS: Of 284 eligible points, 257 entered the study: 116 were allocated to the BMT group and 141 to the control group. The 5-year survival rates were not statistically significantly different between the two groups. When only patients with high-risk ALL were considered (those with [1] Philadelphia chromosome [Ph1] ALL, [2] null or undifferentiated ALL, or [3] c-ALL with either age greater than 35 years or WBC count > 30 x 10(9)/L or time to achieve complete remission > 4 weeks), overall survival (P = .03) and disease-free-survival (P = .01) were better for the BMT group compared with the control group (5-year overall survival rates, 44% v 20%; 5-year disease-free survival rates, 39% v 14%). CONCLUSION: Allogeneic transplantation does not improve survival in patients with standard-risk ALL and should be recommended only for patients with adverse prognostic factors.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Transplante de Medula Óssea , Leucemia-Linfoma Linfoblástico de Células Precursoras/terapia , Adolescente , Adulto , Ciclofosfamida/administração & dosagem , Feminino , Teste de Histocompatibilidade , Humanos , Masculino , Leucemia-Linfoma Linfoblástico de Células Precursoras/mortalidade , Prednisona/administração & dosagem , Prognóstico , Indução de Remissão , Taxa de Sobrevida , Transplante Autólogo , Transplante Homólogo , Vincristina/administração & dosagem
18.
J Clin Oncol ; 5(3): 426-35, 1987 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-3546617

RESUMO

In order to evaluate the effectiveness and reproducibility of T cell depletion in human leukocyte antigen (HLA)-matched bone marrow graft to prevent graft-v-host disease (GVHD), our multicentric study (nine different centers) investigated 62 consecutive patients with poor prognosis leukemia or hematosarcoma from June 1984 to November 1985. The data were updated October 1, 1986, and the mean follow-up was 18 +/- 4.3 months. T cells were depleted with a combination of 3-pan-T cell monoclonal antibodies (CD2 "D66"; CD5 "A50"; CD7 "I21") with a single incubation of rabbit complement (C'). The average number of T cells infused was 0.66 X 10(6) +/- 0.56/kg body weight. Twenty-six patients received chemoprophylaxis for GVHD, 16 received methotrexate, and ten received cyclosporin A. Only a single case of severe (greater than grade II) GVHD was observed, yet the incidence of graft failure was 19%. Factors that might have influenced the occurrence of graft failure appear to be the lack of radiotherapy in the conditioning regimen; the conditioning regimen itself (fractionated total body irradiation [TBI], 12 Gy, v single dose is better than TBI, 10 Gy, but still not statistically significant); and the age of the patients (high-risk after 30 years of age). In contrast, neither the number of nucleated cells reinfused nor the level of T cell depletion (provided the T cells were below critical numbers) seemed to have an influence, nor did chemoprophylaxis for GVHD or splenectomy in chronic granulocytic leukemia (CGL) patients. The survival of graft failure patients was very poor (one of 11; survival at 15 months of the initial graft). Thus, our study demonstrates the reproducibility and high effectiveness in preventing GVHD by immunodepletion of T cells in a large-scale multicentric assay, in which compliance with the protocol of immunodepletion was reasonably good. This study thus provides interesting clues to overcoming graft rejection.


Assuntos
Anticorpos Monoclonais/farmacologia , Transplante de Medula Óssea , Proteínas do Sistema Complemento/farmacologia , Doença Enxerto-Hospedeiro/prevenção & controle , Neoplasias/terapia , Adolescente , Adulto , Medula Óssea/imunologia , Criança , Pré-Escolar , Feminino , Rejeição de Enxerto , Humanos , Lactente , Leucemia/terapia , Depleção Linfocítica , Masculino , Prognóstico , Linfócitos T/imunologia
19.
J Clin Oncol ; 11(10): 1990-2001, 1993 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-8410124

RESUMO

PURPOSE: In a prospective multicenter study, we analyzed the benefits of allogeneic bone marrow transplantation (BMT) in a nonselected group of adult patients with acute lymphoblastic leukemia (ALL) and, by a randomized trial, evaluated the effectiveness of autologous BMT over chemotherapy as postremission therapy in patients younger than 50 years who were not candidates for allogeneic BMT. PATIENTS AND METHODS: After induction therapy that randomized patients to receive one of two anthracycline-containing regimens, either daunorubicin (DNR) or zorubicin (ZRB), patients were assigned to postremission treatment according to age and results of HLA typing. Patients younger than 40 years with an HLA-identical sibling (group 1) were scheduled to receive cyclophosphamide 60 mg/kg on days 1 and 2, total-body irradiation (TBI), and allogeneic BMT. Patients older than 50 years (group 2) received the chemotherapy arm composed of three monthly consolidation courses (DNR or ZRB, cytarabine, and asparaginase) followed by maintenance chemotherapy (modified L10 regimen). The remaining population (group 3) was randomly assigned to receive, after the three 1-month consolidation courses, either the chemotherapy arm or autologous BMT following a conditioning regimen similar to that of group 1. RESULTS: Of the 572 assessable patients, 436 achieved complete remission (78% +/- 2% for DNR v 74% +/- 3% for ZRB; P = .3). The estimated 3-year disease-free survival (DFS) rate for the 116 patients included in group 1 was 43% +/- 5%. Both autologous BMT (95 patients) and chemotherapy (96 patients) produced comparable 3-year DFS rates (39% +/- 5% v 32% +/- 5%) and survival durations (49% +/- 5% v 42% +/- 5%). However, late relapses after 36 months were mainly observed in the chemotherapy arm. CONCLUSION: This first interim analysis did not demonstrate a benefit of this autologous BMT procedure over classical maintenance chemotherapy in patients with ALL who received consolidation chemotherapy.


Assuntos
Transplante de Medula Óssea , Leucemia-Linfoma Linfoblástico de Células Precursoras/terapia , Adolescente , Adulto , Antineoplásicos/efeitos adversos , Antineoplásicos/uso terapêutico , Terapia Combinada , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Leucemia-Linfoma Linfoblástico de Células Precursoras/tratamento farmacológico , Leucemia-Linfoma Linfoblástico de Células Precursoras/imunologia , Estudos Prospectivos , Indução de Remissão , Análise de Sobrevida , Resultado do Tratamento
20.
J Clin Oncol ; 10(12): 1865-9, 1992 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-1453201

RESUMO

PURPOSE: We retrospectively analyzed the outcome of children with acute myeloid leukemia (AML) in first complete remission (CR) who received HLA-identical bone marrow transplantation (BMT) in 13 French transplant centers. PATIENTS AND METHODS: Seventy-four children were treated from June 1979 through December 1990. The conditioning regimen included total-body irradiation (TBI) in 54 cases and busulfan in 20. Prophylaxis of graft-versus-host disease (GVHD) consisted of cyclosporine (CycloA) plus methotrexate (MTX) for 38 patients, MTX for 17, CycloA for 18, and T depletion without other prophylaxis for one. The mean value of the interval from diagnosis to transplantation was 167 days. RESULTS: Sixteen patients died of transplant-related complications, 12 relapsed, and 46 are alive in continuous remission with a median follow-up of 46 months. We examined results obtained over three successive periods: 1979 to 1982 (n = 14 children), 1983 to 1986 (n = 29), and 1987 to 1990 (n = 31). Probabilities of event-free survival (EFS) were 43%, 48%, and 82% for the three successive periods, respectively (P < .02). This improvement in EFS was linked to a decreased risk of transplant-related mortality: 36%, 36%, and 3%, respectively (P < .01). Other factors associated with a better EFS in the univariate analysis were a short time interval from diagnosis to transplant (< 120 days), the absence of significant (grade > or = 2) acute GVHD, and the absence of chronic GVHD. In the multivariate analysis, two factors had a favorable impact on long-term survival: the year of transplantation (years 1987 to 1990 v others) and the absence of acute GVHD. CONCLUSION: The outcome for children receiving allogeneic BMT in first CR of AML has improved in France during recent years.


Assuntos
Transplante de Medula Óssea , Leucemia Mieloide/cirurgia , Doença Aguda , Adolescente , Análise de Variância , Transplante de Medula Óssea/efeitos adversos , Criança , Pré-Escolar , Ciclosporina/uso terapêutico , Feminino , Doença Enxerto-Hospedeiro/etiologia , Doença Enxerto-Hospedeiro/prevenção & controle , Humanos , Lactente , Masculino , Metotrexato/uso terapêutico , Análise de Regressão , Estudos Retrospectivos , Transplante Homólogo , Resultado do Tratamento
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA