Consulta: subjectFacets:"Loss of heterozygosity"
Registros recuperados: 3
Data/hora: 13/06/2024 00:44:13

Detection of mutator phenotype in Brazilian patients with acute and chronic myeloid leukemia
Provedor de dados: 74
Autores: Ayres,Flávio Monteiro; Momotuk,Euza Guimarães; Bastos,Celso da Cunha; Cruz,Aparecido Divino da.
The multisteps of tumorigenesis involve the classic chromosomal instability and the mutator phenotype pathways featured by a predisposition to acquire mutations in tumor suppressor genes and oncogenes. Expansion and contraction of microsatellite sequences due to a deficient mismatch repair system are a marker of the mutator phenotype. Controversial results regarding the extent of microsatellite instability (MSI) have been reported in the development and progression of myeloid malignancies. Here, we investigated MSI and loss of heterozygosity (LOH) frequencies at the microsatellite loci BAT-26, D7S486, D8S135, ANK1, IFNA, TP53 and bcr of 19 Brazilian patients with acute (AML) and chronic myeloid leukemia (CML). One AML patient and one CML patient were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Loss of heterozygosity; Microsatellite instability; Mismatch repair; Mutator phenotype; Myeloid leukemia.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000400003

Acetaldehyde induced developmental and genetic damage in Drosophila melanogaster
Provedor de dados: 46
Autores: Palermo,A.M; Mudry,M.D.
Acetaldehyde (AAld) is a ubiquitous compound in the environment. Exposure may occur in its manufacture or use, in the consumption of alcoholic beverages and through cigarette smoke. It causes distant target effects, including DNA damage, glutathione depletion, enzyme inactivation and cell death. In the present work, its potential teratogenic, mutagenic and recombinagenic effects in somatic cells of D. melanogaster were analyzed. The white/white+ (w/w+) eye mosaic test (Somatic Mutation And Recombination Test, SMART) was applied by mating w/w females with y/Y males. Larvae of 48 ± 4 h were transferred to media with 0.01 %, 0.02 %, 0.05 % and 0.10 % AAld for 12 hs and then moved to regular media until pupation. The emerging w/w+ females were evaluated for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ethanol; Teratogenesis; Mutagenesis; Loss of heterozygosity; Eye-spot test.
Ano: 2015
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332015000300007

Association of loss of heterozygosity with cytogenetic abnormalities in acute myeloid leukemia and myelodysplastic syndrome
Provedor de dados: 56
Autores: Pinheiro,R.F.; Serio,F.M.; Silva,M.R.R.; Briones,M.R.S.; Chauffaille,M.L.L.F.
Deletions on chromosomes 5 and 7 are frequently seen in myelodysplastic syndrome (MDS) and acute myeloid leukemia (AML). It is assumed that these deletions indicate loss of tumor suppressor genes on these chromosomes and until these tumor suppressor genes are identified, the functional consequences of these deletions and the molecular basis of these myeloid disorders cannot be completely understood. We evaluated loss of heterozygosity (LOH) in 44 patients (18 MDS and 26 AML, diagnosed according to WHO classification criteria) at diagnosis, using a four-microsatellite marker panel: an intragenic marker on the 7th intron of gene IRF-1 of the 5q31.1 region and three markers located inside the 7q31.1 region and correlated the LOH with karyotype abnormalities....
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Myelodysplastic syndrome; Acute myeloid leukemia; Cytogenetic abnormalities; Loss of heterozygosity.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008000700010