Your browser doesn't support javascript.
Mostrar: 20 | 50 | 100
Resultados 1 - 5 de 5
Filtros adicionais

País/Região como assunto
Intervalo de ano
Biol Blood Marrow Transplant ; 23(1): 172-175, 2017 01.
Artigo em Inglês | MEDLINE | ID: mdl-27777142


Steroid refractory acute graft-versus-host-disease of the gut is a serious complication associated with high mortality after allogeneic stem cell transplantation. Treatment options are limited and not predictably effective. We describe the treatment of steroid-refractory acute graft-versus-host-disease with vedolizumab, an antibody directed against integrin α4ß7, in 6 patients. All patients responded, and 4 of 6 patients are alive with a median follow-up of 10 months.

Anticorpos Monoclonais Humanizados/uso terapêutico , Doença Enxerto-Hospedeiro/tratamento farmacológico , Integrinas/efeitos dos fármacos , Enteropatias/tratamento farmacológico , Adulto , Feminino , Fármacos Gastrointestinais/uso terapêutico , Doença Enxerto-Hospedeiro/patologia , Transplante de Células-Tronco Hematopoéticas/efeitos adversos , Humanos , Masculino , Pessoa de Meia-Idade , Terapia de Salvação/métodos , Esteroides/uso terapêutico , Transplante Homólogo , Resultado do Tratamento
J Allergy Clin Immunol ; 139(1): 232-245, 2017 01.
Artigo em Inglês | MEDLINE | ID: mdl-27577878


BACKGROUND: Primary immunodeficiency diseases (PIDDs) are clinically and genetically heterogeneous disorders thus far associated with mutations in more than 300 genes. The clinical phenotypes derived from distinct genotypes can overlap. Genetic etiology can be a prognostic indicator of disease severity and can influence treatment decisions. OBJECTIVE: We sought to investigate the ability of whole-exome screening methods to detect disease-causing variants in patients with PIDDs. METHODS: Patients with PIDDs from 278 families from 22 countries were investigated by using whole-exome sequencing. Computational copy number variant (CNV) prediction pipelines and an exome-tiling chromosomal microarray were also applied to identify intragenic CNVs. Analytic approaches initially focused on 475 known or candidate PIDD genes but were nonexclusive and further tailored based on clinical data, family history, and immunophenotyping. RESULTS: A likely molecular diagnosis was achieved in 110 (40%) unrelated probands. Clinical diagnosis was revised in about half (60/110) and management was directly altered in nearly a quarter (26/110) of families based on molecular findings. Twelve PIDD-causing CNVs were detected, including 7 smaller than 30 Kb that would not have been detected with conventional diagnostic CNV arrays. CONCLUSION: This high-throughput genomic approach enabled detection of disease-related variants in unexpected genes; permitted detection of low-grade constitutional, somatic, and revertant mosaicism; and provided evidence of a mutational burden in mixed PIDD immunophenotypes.

Síndromes de Imunodeficiência/genética , Adolescente , Adulto , Idoso , Criança , Pré-Escolar , Variações do Número de Cópias de DNA , Feminino , Genômica , Sequenciamento de Nucleotídeos em Larga Escala , Humanos , Lactente , Masculino , Pessoa de Meia-Idade , Adulto Jovem
Exp Hematol Oncol ; 5: 8, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26949571


BACKGROUND: The chromosomal translocation t(11;19)(q23;p13) with a breakpoint within subband 19p13.1 is found mainly in acute myeloid leukemia (AML) and results in the MLL-ELL fusion gene. Variations in the structure of MLL-ELL seem to influence the leukemogenic potency of the fusion in vivo and may lie behind differences in clinical features. The number of cases reported so far is very limited and the addition of more information about MLL-ELL variants is essential if the possible clinical significance of rare fusions is to be determined. CASE PRESENTATION: Cytogenetic and molecular genetic analyses were done on the bone marrow cells of a 20-month-old boy with an unusual form of myelomonocytic AML with multiple myeloid sarcomas infiltrating bone and soft tissues. The G-banding analysis together with FISH yielded the karyotype 47,XY, +6,t(8;19;11)(q24;p13;q23). FISH analysis also demonstrated that MLL was split. RNA-sequencing showed that the translocation had generated an MLL-ELL chimera in which exon 9 of MLL (nt 4241 in sequence with accession number NM_005933.3) was fused to exon 6 of ELL (nt 817 in sequence with accession number NM_006532.3). RT-PCR together with Sanger sequencing verified the presence of the above-mentioned fusion transcript. CONCLUSIONS: Based on our findings and information on a few previously reported patients, we speculate that young age, myelomonoblastic AML, and the presence of extramedullary disease may be typical of children with rare MLL-ELL fusion transcripts.

J Natl Cancer Inst ; 104(16): 1251-9, 2012 Aug 22.
Artigo em Inglês | MEDLINE | ID: mdl-22855780


BACKGROUND: Previous nested case-control studies suggest that a prediagnostic biomarker of allergy, IgE, is inversely associated with the risk of glioma, but these findings are inconsistent. The purpose of our study was to assess this association and determine how long before glioma diagnosis it may be observed. METHODS: We conducted a nested case-control study using serum specimens from the Janus Serum Bank cohort in Norway. Blood donors who were subsequently diagnosed with glioma (n = 594 case subjects), between January 1, 1974 to December 31, 2007, were matched with subjects without glioma (n = 1177 control subjects) for date of blood collection, 2-year age interval at blood collection, and sex. Respiratory allergen-specific and total IgE levels in the serum were measured using fluorescent assays. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated using conditional logistic regression models stratified on sex and glioblastoma, the most common glioma subtype. Data were stratified on time from blood collection to tumor diagnosis to assess how long before glioma diagnosis the association could be observed. RESULTS: Among women, testing positive for allergen-specific IgE (>0.35 kU(A)/L) was associated with decreased risk of glioblastoma compared with testing negative (≤0.35 kU(A)/L; OR = 0.46, 95% CI = 0.23 to 0.93). Among both sexes combined, testing positive for total IgE (>100 kU/L) was associated with decreased risk of glioma compared with testing negative (≤100 kU/L; OR = 0.75, 95% CI = 0.56 to 0.99), and simultaneously testing positive for allergen-specific IgE and total IgE was associated with a borderline statistically significantly decreased risk of glioblastoma and glioma compared with simultaneously testing negative for these types of IgE. Testing positive for total IgE at least 20 years before diagnosis was associated with decreased risk of glioma compared with testing negative (OR = 0.54, 95% CI = 0.30 to 0.99). CONCLUSION: An inverse association between IgE levels and risk of glioma was detected; the association was present at least 20 years before tumor diagnosis.

Neoplasias Encefálicas/epidemiologia , Neoplasias Encefálicas/prevenção & controle , Glioma/epidemiologia , Glioma/prevenção & controle , Imunoglobulina E/sangue , Adulto , Neoplasias Encefálicas/imunologia , Estudos de Casos e Controles , Feminino , Glioblastoma/epidemiologia , Glioma/imunologia , Humanos , Hipersensibilidade/imunologia , Masculino , Pessoa de Meia-Idade , Noruega/epidemiologia , Estudos Prospectivos , Projetos de Pesquisa , Fatores Sexuais , Fatores de Tempo
Pediatr Hematol Oncol ; 27(1): 31-45, 2010 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-20121553


The number of circulating B-cells in peripheral blood plateaus between 2 and 24 months of age, and thereafter declines gradually. How this reflects the kinetics of the precursor B-cell pool in the bone marrow is of clinical interest, but has not been studied thoroughly in humans. The authors analyzed bone marrow (n = 37) from healthy children and adults (flow cytometry) searching for age-related changes in the total precursor B-cell compartment. In an age-matched cohort (n = 25) they examined age-related global gene expression changes (Affymetrix) in unsorted bone marrow with special reference to the recombination activating gene 1, RAG1. Subsequently, they searched the entire gene set for transcripts correlating to the RAG1 profile to discover other known and possibly new precursor B-cell related transcripts. Both methods disclosed a marked, transient increase of total precursor B-cells at 6-20 months, followed by a rapid decrease confined to the first 2 years. The decline thereafter was considerably slower, but continued until adulthood. The relative composition of total precursor B-cells, however, did not change significantly with age. The authors identified 54 genes that were highly correlated to the RAG1 profile (r >or= .9, p < 1 x 10(-8)). Of these 54 genes, 15 were characteristically B-lineage associated like CD19, CD79, VPREB, EBF1, and PAX5; the remaining 39 previously not described as distinctively B-lineage related. The marked, transient increase in precursor B-cells and RAG1 transcriptional activity is not reflected by a similar peak in B-cells in peripheral blood, whereas the sustained plateau concurs in time.

Envelhecimento/sangue , Subpopulações de Linfócitos B , Pré-Escolar , Regulação da Expressão Gênica no Desenvolvimento , Células-Tronco Hematopoéticas , Lactente , Contagem de Linfócitos , Adolescente , Adulto , Envelhecimento/imunologia , Medula Óssea/crescimento & desenvolvimento , Exame de Medula Óssea , Linhagem da Célula , Criança , Estudos de Coortes , Feminino , Citometria de Fluxo , Perfilação da Expressão Gênica , Proteínas de Homeodomínio/biossíntese , Proteínas de Homeodomínio/genética , Humanos , Recém-Nascido , Masculino , RNA Mensageiro/genética , Transcrição Genética , Adulto Jovem