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Asynchronous expression of myeloid antigens in leukemic cells in a PML/RARalpha transgenic mouse model BJMBR
Santana,B.A.A.; Pintão,M.C.; Lima,R.S. Abreu e; Scheucher,P.S.; Santos,G.A.S.; Garcia,A.B.; Falcão,R.P.; Rego,E.M..
Acute promyelocytic leukemia (APL) is characterized by the expansion of blasts that resemble morphologically promyelocytes and harbor a chromosomal translocation involving the retinoic acid receptor a (RARa) and the promyelocytic leukemia (PML) genes on chromosomes 17 and 15, respectively. The expression of the PML/RARa fusion gene is essential for APL genesis. In fact, transgenic mice (TM) expressing PML/RARa develop a form of leukemia that mimics the hematological findings of human APL. Leukemia is diagnosed after a long latency (approximately 12 months) during which no hematological abnormality is detected in peripheral blood (pre-leukemic phase). In humans, immunophenotypic analysis of APL blasts revealed distinct features; however, the precise...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Acute promyelocytic leukemia; Acute myelogenous leukemia; Transgenic mice; Flow cytometry; Leukemogenesis.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000500008
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Microsatellite instability and cytogenetic survey in myeloid leukemias BJMBR
Ribeiro,E.M.S.F.; Rodriguez,J.M.; Cóser,V.M.; Sotero,M.G.; Fonseca Neto,J.M.; Pasquini,R.; Cavalli,I.J..
Microsatellites are short tandem repeat sequences dispersed throughout the genome. Their instability at multiple genetic loci may result from mismatch repair errors and it occurs in hereditary nonpolyposis colorectal cancer. This instability is also found in many sporadic cancers. In order to evaluate the importance of this process in myeloid leukemias, we studied five loci in different chromosomes of 43 patients, 22 with chronic myelocytic leukemia (CML) in the chronic phase, 7 with CML in blast crisis, and 14 with acute myeloid leukemia (AML), by comparing leukemic DNA extracted from bone marrow and constitutional DNA obtained from buccal epithelial cells. Only one of the 43 patients (2.1%), with relapsed AML, showed an alteration in the allele length at...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Genomic instability; Mismatch repair errors; Cytogenetics; Leukemogenesis.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000200003
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