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| Registros recuperados: 22 | |
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| Lima,Melissa Pires de; Hilst,Luciana Farhat; Mattana,Fernanda Vanessa Rechinbach; Santos,Cid Aimbiré de Moraes; Weffort-Santos,Almeriane Maria. |
| The effects of the alkaloid-rich fraction of Himatanthus lancifolius (Müll. Arg) Woodson on normal marrow cells and leukemic cell lines were investigated. After 48 h exposure, the proliferation assay showed significant cell growth inhibition for Daudi (0.1-10 µg/mL), K-562 (1-10 µg/mL), and REH cells (10-100 µg/mL), yet was inert for normal marrow cells. A similar inhibition profile was observed in clonogenic assays. This alkaloid-rich fraction, in which uleine is the main compound, showed no signs of toxicity to any cells up to 10 µg/mL. Cell feature analyses after induction of differentiation showed maintenance of the initial phenotype. Flow cytometric expression of Annexin-V and 7-AAD in K-562 and Daudi cells has indicated that the cells were not... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apocynaceae; Cell proliferation; Himatanthus lancifolius; Indole alkaloids; Leukemia; Plant extract. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502010000200014 |
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| Lange,A.P.; Almeida,L.Y.; Araújo Silva,C.L.; Scheucher,P.S.; Chahud,F.; Krause,A.; Bohlander,S.K.; Rego,E.M.. |
| Although rare, CALM/AF10 is a chromosomal rearrangement found in immature T-cell acute lymphoblastic leukemia (T-ALL), acute myeloid leukemia, and mixed phenotype acute leukemia of T/myeloid lineages with poor prognosis. Moreover, this translocation is detected in 50% of T-ALL patients with gamma/delta T cell receptor rearrangement, frequently associated with low expression of transcription factor CCAAT/enhancer-binding protein alpha (CEBPA). However, the relevance of CEBPA low expression for CALM/AF10 leukemogenesis has not yet been evaluated. We generated double mutant mice, which express the Lck-CALM/AF10 fusion gene and are haploinsufficient for the Cebpa gene. To characterize the hematopoiesis, we quantified hematopoietic stem cells, myeloid... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leukemia; CEBPA; CALM/AF10; Transgenic mice. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2019000600604 |
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| Garcia-Hernandez,Samanta Celeste; Meneses-Sanchez,Perla; Porchia,Leonardo Martin; Torres-Rasgado,Enrique; Pérez-Fuentes,Ricardo; Gonzalez-Mejia,Martha Elba. |
| Abstract Our objective was to determine the association between the methylenetetrahydrofolate reductase polymorphisms (C677T and A1298C) and the risk of developing acute lymphoblastic leukemia (ALL), chronic myeloid leukemia (CML), acute myeloid leukemia (AML), and multiple myelomas (MM) in Latinos. PubMed, SCOPUS, EBSCO, LILACS, and other Latin-specific databases were searched for case-control studies that investigated the association between these polymorphisms and hematologic malignancies until November 2017. Genotype distributions were extracted and either fixed-effects or random-effects models were used to calculate the pooled crude odds ratios (ORs) for the heterozygous, homozygous, dominant, recessive, and allelic genetic models. No publication bias... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MTHFR; Protective factor; Latin America; Leukemia. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000400549 |
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| Folgueira,M.A.A.K.; Federico,M.H.H.; Roela,R.A.; Maistro,S.; Katayama,M.L.H.; Brentani,M.M.. |
| A close correlation between vitamin D receptor (VDR) abundance and cell proliferation rate has been shown in NIH-3T3 fibroblasts, MCF-7 breast cancer and in HL-60 myeloblastic cells. We have now determined if this association occurs in other leukemic cell lines, U937 and K562, and if VDR content is related to c-myc expression, which is also linked to cell growth state. Upon phorbol myristate acetate (PMA) treatment, cells from the three lineages (HL-60, U937 and K562) differentiated and expressed specific surface antigens. All cell lines analyzed were growth inhibited by PMA and the doubling time was increased, mainly due to an increased fraction of cells in the G0/G1 phase, as determined by flow cytometry measurements of incorporated bromodeoxyuridine and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Receptors; Calcitriol; Cell division; Cell differentiation; Leukemia; Phorbol esters. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000500011 |
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| Kaparou,Maria; Choumerianou,Despoina; Perdikogianni,Chrysoula; Martimianaki,Georgia; Kalmanti,Maria; Stiakaki,Eftichia. |
| It has been suggested that leukemia is characterized by an impaired balance between the proliferation of blood cells and their capacity to undergo apoptosis. The aim of this study was to examine the expression of key molecules related to apoptosis (BCL-2, BAX, FAS, FAS-L) in children with acute lymphoblastic leukemia (ALL). Measurement of BCL-2 and BAX mRNA was performed by quantitative real-time PCR, and membrane expression of FAS and FAS-L was assessed by flow cytometry in bone marrow mononuclear cells, both at diagnosis and at remission following induction chemotherapy. At diagnosis, increased levels of the apoptotic BAX/BCL-2 ratio were observed in children older than 10 years and with higher white blood cell counts. A DNA index < 1.16 was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leukemia; Real-time PCR analysis; Protein. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000100002 |
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| Petrilli,Antonio Sérgio; Cypriano,Monica; Dantas,Lenice Silva; Lee,Lúcia Martino; Luisi,Maria Flávio Augusto Vercillo; Silva,Katia Veronica Torres B.; Pereira,Carlos Alberto Pires. |
| BACKGROUND: The empirical use of antibiotic treatments is widely accepted as a means to treat cancer patients in chemotherapy who have fever and neutropenia. Intravenous monotherapy, with broad spectrum antibiotics, of patients with a high risk of complications is a possible alternative. METHODS: We conducted a prospective open-label, randomized study of patients with lymphoma or leukemia who had fever and neutropenia during chemotherapy. Patients received either monotherapy with ticarcillin/clavulanic acid (T) or ceftriaxone plus amikacin (C+A). RESULTS: Seventy patients who presented 136 episodes were evaluated, 68 in each arm of the study. The mean neutrophil counts at admission were 217cells/mm³ (T) and 201cells/mm³ (C+A). The mean duration of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fever; Neutropenia; Leukemia; Lymphoma; Ticarcillin; Ceftriaxone. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702003000200003 |
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| Razmkhah,Farnaz; Soleimani,Masoud; Ghasemi,Sorayya; Kafi-abad,Sedigheh Amini. |
| Abstract Microvesicles are able to induce the cell of origin’s phenotype in a target cell. MicroRNA-21, as an oncomir, is up-regulated in almost all cancer types such as leukemia which results in cell proliferation. In this study, we examine the ability of leukemia microvesicles to induce proliferation in hematopoietic stem progenitor cells (HSPCs) via microRNA-21 dysregulation. Herein, leukemia microvesicles were isolated from HL-60 and NB-4 cell lines by ultracentrifugation, and then their protein content was measured. Normal HSPCs were isolated from umbilical cord blood samples by a CD-34 antibody. These cells were treated with 20 and 40 μg/mL leukemia microvesicles for 5 and 10 days, respectively. Cell count, CD-34 analysis, and a microRNA-21 gene... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leukemia; Microvesicles; Hematopoietic stem cells; MicroRNA-21. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000300465 |
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| Zanette,D.L.; Rivadavia,F.; Molfetta,G.A.; Barbuzano,F.G.; Proto-Siqueira,R.; Falcão,R.P.; Zago,M.A.; Silva-Jr,W.A.. |
| MicroRNAs (miRNAs) are a class of small endogenous RNAs that play important regulatory roles by targeting mRNAs for cleavage or translational repression. miRNAs act in diverse biological processes including development, cell growth, apoptosis, and hematopoiesis, suggesting their association with cancer. We determined the miRNA expression profile of chronic and acute lymphocytic leukemias (CLL and ALL) using the TaqMan® MicroRNA Assays Human Panel (Applied Biosystems). Pooled leukemia samples were compared to pooled CD19+ samples from healthy individuals (calibrator) by the 2-DDCt method. Total RNA input was normalized based on the Ct values obtained for hsa-miR-30b. The five most highly expressed miRNAs were miR-128b, miR-204, miR-218, miR-331, and... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Non-coding RNA; MicroRNA; Hematopoietic malignancies; Leukemia; MiR-331. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007001100003 |
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| Marques-Salles,Terezinha de Jesus; Soares-Ventura,Eliane Maria; Oliveira,Nathalia Lopes de; Silva,Mariluze; Assis,Reijane; Morais,Vera Lúcia Lins de; Otero,Luize; Fernandez,Teresa; Pombo-de-Oliveira,Maria do Socorro; Muniz,Maria Tereza Cartaxo; Santos,Neide. |
| We report the case of a five-month-old black male infant who had recurrent episodes of respiratory infections and also presented anemia and enlargements of the spleen, liver and lymphnodes. Hematological analysis revealed morphological abnormalities with megaloblastic dyserythropoiesis, while fetal hemoglobin assaying showed normal levels. Conventional and molecular cytogenetic analysis revealed monosomy of chromosome 7. Despite all therapeutic efforts during allogenic bone marrow transplantation, the child died due to generalized infection. The clinical and genetic distinctions between monosomy 7 syndrome and myelodysplastic disorders in childhood are discussed. |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Leukemia; Monosomy 7; Myeloproliferative syndrome. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000100007 |
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| Coelho,F.M.; Maia,M.Q.; Luppi,M.M.; Costa,E.A.; Luiz,A.P.M.F.; Ribeiro,N.A.; Bomfim,M.R.Q.; Fonseca,F.G.; Resende,M.. |
| Blood samples from 1,072 domestic cats of nine administrative regions of Belo Horizonte, MG, were collected and tested using PCR nested for the occurrence of feline leukemia virus (FeLV). Overall occurrence was 47.5% (507/1072) being North (68.1%) and East (54.4%) the most prevalent areas. Epidemiological data showed that FeLV infection was very common among examined cats and breed neither gender nor were predisposing factors for FeLV. The results suggest that the agglomeration of a large number of cats in the same environment can be an important factor for the increase in the rate of transmission of this retrovirus among domestic cats in the studied city. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cat; Feline; Leukemia; Retrovirus; PCR-nested. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352011000300037 |
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| Santos,M.F.M.; Oliveira,F.C.A.C.; Kishimoto,R.K.; Borri,D.; Santos,F.P.S.; Campregher,P.V.; Silveira,P.A.A.; Hamerschlak,N.; Mangueira,C.L.P.; Duarte,F.B.; Crepaldi,A.H.; Salvino,M.A.; Velloso,E.D.R.P.. |
| Cytogenetics is essential in myeloid neoplasms (MN) and pre-analytical variables are important for karyotyping. We assessed the relationship between pre-analytical variables (time from collection to sample processing, material type, sample cellularity, and diagnosis) and failures of karyotyping. Bone marrow (BM, n=352) and peripheral blood (PB, n=69) samples were analyzed from acute myeloid leukemia (n=113), myelodysplastic syndromes (n=73), myelodysplastic syndromes/myeloproliferative neoplasms (n=17), myeloproliferative neoplasms (n=137), and other with conclusive diagnosis (n=6), and reactive disorders/no conclusive diagnosis (n=75). The rate of unsuccessful karyotyping was 18.5% and was associated with the use of PB and a low number of nucleated cells... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cytogenetics; Karyotype; Leukemia; Myelodysplasia; Myeloproliferative disease. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2019000200608 |
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| Paz-y-Miño,César; López-Cortés,Andrés; Muñoz,María José; Castro,Bernardo; Cabrera,Alejandro; Sánchez,María Eugenia. |
| The hRAD54 gene is a key member of the RAD52 epistasis group involved in repair of double-strand breaks (DSB) by homologous recombination (HR). Thus, alterations of the normal function of these genes could generate genetic instability, shifting the normal process of the cell cycle, leading the cells to develop into cancer. In this work we analyzed exon 18 of the hRAD54 gene, which has been previously reported by our group to carry a silent polymorphism, 2290 C/T (Ala730Ala), associated to meningiomas. We performed a PCR-SSCP method to detect the polymorphism in 239 samples including leukemia and normal control population. The results revealed that the 2290 C/T polymorphism has frequencies of 0.1 for the leukemia and 0.1 for the control group. These... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cancer; Leukemia; CML; ALL; HRAD54; 2290 C/T polymorphism. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000400009 |
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| Chen,W.L.; Luo,D.F.; Gao,C.; Ding,Y.; Wang,S.Y.. |
| The familial acute myeloid leukemia related factor gene (FAMLF) was previously identified from a familial AML subtractive cDNA library and shown to undergo alternative splicing. This study used real-time quantitative PCR to investigate the expression of the FAMLF alternative-splicing transcript consensus sequence (FAMLF-CS) in peripheral blood mononuclear cells (PBMCs) from 119 patients with de novo acute leukemia (AL) and 104 healthy controls, as well as in CD34+ cells from 12 AL patients and 10 healthy donors. A 429-bp fragment from a novel splicing variant of FAMLF was obtained, and a 363-bp consensus sequence was targeted to quantify total FAMLF expression. Kruskal-Wallis, Nemenyi, Spearman's correlation, and Mann-Whitney U-tests were used to analyze... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: FAMLF; Gene expression; Leukemia; Real-time polymerase chain reaction; Alternative splicing. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015000700603 |
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| Registros recuperados: 22 | |
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