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Acute promyelocytic leukemia: the study of t(15;17) translocation by fluorescent in situ hybridization, reverse transcriptase-polymerase chain reaction and cytogenetic techniques BJMBR
Chauffaille,M.L.L.F.; Figueiredo,M.S.; Beltrani,R.; Antunes,S.V.; Yamamoto,M.; Kerbauy,J..
Acute promyelocytic leukemia (AML M3) is a well-defined subtype of leukemia with specific and peculiar characteristics. Immediate identification of t(15;17) or the PML/RARA gene rearrangement is fundamental for treatment. The objective of the present study was to compare fluorescent in situ hybridization (FISH), reverse transcriptase-polymerase chain reaction (RT-PCR) and karyotyping in 18 samples (12 at diagnosis and 6 after treatment) from 13 AML M3 patients. Bone marrow samples were submitted to karyotype G-banding, FISH and RT-PCR. At diagnosis, cytogenetics was successful in 10 of 12 samples, 8 with t(15;17) and 2 without. FISH was positive in 11/12 cases (one had no cells for analysis) and positivity varied from 25 to 93% (mean: 56%). RT-PCR was done...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acute promyelocytic leukemia; Karyotype; FISH; RT-PCR; PML/RARA genem rearrangement.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000600006
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Fludarabine induces apoptosis in chronic lymphocytic leukemia - the role of P53, Bcl-2, Bax, Mcl-1, and Bag-1 proteins BJMBR
Faria,J.R.; Yamamoto,M.; Faria,R.M.D.; Kerbauy,J.; Oliveira,J.S.R..
The expression of P53, Bcl-2, Bax, Bag-1, and Mcl-1 proteins in CD5/CD20-positive B-chronic lymphocytic leukemia (B-CLL) cells from 30 typical CLL patients was evaluated before and after 48 h of incubation with 10-6 M fludarabine using multiparametric flow cytometric analysis. Protein expression was correlated with annexin V expression, Rai modified clinical staging, lymphocyte doubling time, and previous treatment. Our main goal was to determine the predictive value of these proteins in CLL cells in terms of disease evolution. Bcl-2 expression decreased from a median fluorescence index (MFI) of 331.71 ± 42.2 to 245.81 ± 52.2 (P < 0.001) after fludarabine treatment, but there was no difference between viable cells (331.57 ± 44.6 MFI) and apoptotic cells...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chronic lymphocytic leukemia; Apoptosis; Fludarabine; P53; Bcl-2; Bax; Mcl-1; Bag-1.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000300003
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Fungal infections in marrow transplant recipients under antifungal prophylaxis with fluconazole BJMBR
Oliveira,J.S.R.; Kerbauy,F.R.; Colombo,A.L.; Bahia,D.M.M.; Pinheiro,G.S.; Silva,M.R.R.; Ribeiro,M.S.S.; Raineri,G.; Kerbauy,J..
Fungal infection is one of the most important causes of morbidity and mortality in bone marrow transplant (BMT) recipients. The growing incidence of these infections is related to several factors including prolonged granulocytopenia, use of broad-spectrum antibiotics, conditioning regimens, and use of immunosuppression to avoid graft-versus-host disease (GvHD). In the present series, we report five cases of invasive mold infections documented among 64 BMT recipients undergoing fluconazole antifungal prophylaxis: 1) A strain of Scedosporium prolificans was isolated from a skin lesion that developed on day +72 after BMT in a chronic myeloid leukemic patient. 2) Invasive pulmonary aspergillosis (Aspergillus fumigatus) was diagnosed on day +29 in a patient...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bone marrow transplantation; Fungal infections; Fluconazole prophylaxis.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000700005
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Karyotype of cryopreserved bone marrow cells BJMBR
Chauffaille,M.L.L.F.; Pinheiro,R.F.; Stefano,J.T.; Kerbauy,J..
The analysis of chromosomal abnormalities is important for the study of hematological neoplastic disorders since it facilitates classification of the disease. The ability to perform chromosome analysis of cryopreserved malignant marrow or peripheral blast cells is important for retrospective studies. In the present study, we compared the karyotype of fresh bone marrow cells (20 metaphases) to that of cells stored with a simplified cryopreservation method, evaluated the effect of the use of granulocyte-macrophage colony-stimulating factor (GM-CSF) as an in vitro mitotic index stimulator, and compared the cell viability and chromosome morphology of fresh and cryopreserved cells whenever possible (sufficient metaphases for analysis). Twenty-five bone marrow...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Cryopreservation; Karyotype; Bone marrow cells.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000700004
Registros recuperados: 4
Primeira ... 1 ... Última
 

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