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1.
Acta cir. bras ; 20(supl.1): 101-108, 2005.
Article in English | LILACS | ID: lil-414642

ABSTRACT

OBJETIVOS: CD5 é um marcador normalmente expresso nas células T e de forma aberrante nas células B da leucemia linfocítica crônica (LLC) e no linfoma de células do manto (LCM). Outras doenças linfoproliferativas crônicas como a hairy cell leukemia (HCL) e leukemia prolinfocítica de células B (LPL-B), são geralmente CD5 negativas ou expressam fracamente este antígeno. Neste trabalho investigou-se o padrão de expressão do CD5 em 42 pacientes com doenças linfoproliferativas crônicas de células B (DLC-B). METODOS: Investigamos a expressão de CD5 em células leucêmicas de 42 pacientes com DLC-B através da citometria de fluxo. Dados demográficos, tais como idade e sexo, bem como dados clínicos e laboratoriais também foram analisados. RESULTADOS: A imunofenotipagem mostrou que 35 casos foram LLC, 3 LPL-B, 3 HCL e um caso de LMC. O CD5 mostrou-se fortemente expresso em todos os casos de LLC e LMC. Baixa expressão desse antígeno foi observada em um caso de LPL-B, mostrando-se negativamente expresso em todos os casos de HCL. CONCLUSÃO: Nossos resultados demonstram que o padrão de expressão do CD5 pode auxiliar na distinção entre LLC da HCL e LPL-B, sendo no entanto similares na HCL e LCM.


Subject(s)
Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , /blood , Flow Cytometry/methods , Immunophenotyping , Leukemia, Lymphocytic, Chronic, B-Cell/diagnosis , Lymphoma, B-Cell/diagnosis , Lymphoproliferative Disorders/diagnosis , Diagnosis, Differential , Lymphocyte Count , Leukemia, Hairy Cell/blood , Leukemia, Hairy Cell/diagnosis , Leukemia, Lymphocytic, Chronic, B-Cell/blood , Lymphoma, B-Cell/blood , Lymphoma, Mantle-Cell/blood , Lymphoma, Mantle-Cell/diagnosis , Lymphoproliferative Disorders/blood , Biomarkers, Tumor/blood
2.
In. Osorio Solís, Guido. Hematología: diagnóstico y terapéutica. Santiago de Chile, Mediterráneo, 2 ed; 1997. p.222-39, tab.
Monography in Spanish | LILACS | ID: lil-208991
3.
Journal of Community Medicine. 1994; 7 (1): 23-7
in English | IMEMR | ID: emr-32735

ABSTRACT

47 Iraqi patiens with chronic lymphocytic leukemia were investigated for evidence of a complicating auto-immune hemolytic process by the anti-globulin [Coombs'] test, at presentation and prior to the initiation of treatment.The results show 27.6% of the CLL cases had a positive Coombs' test indicating a complicating auto-immune hemolytic process against their red cells. No equal A significant correlation was found to exist between the frequency of the presence of a positive coornbs' test in cll cases and the disease satging. Advanced stages showed more frequent association-all cases having a positive test were of young age group than the remaining cases.-There was a significant association between the lymphocytes percentage and the development of auto-immune hemolytic anemia in CLL patients. While there was no association between this disorder and thrombocytopenia


Subject(s)
Humans , Leukemia, Lymphocytic, Chronic, B-Cell/blood
4.
Bol. Soc. Bras. Hematol. Hemoter ; 15(164): 93-7, set.-dez. 1993. ilus, tab
Article in Portuguese | LILACS | ID: lil-201504

ABSTRACT

O rearranjo gênico da cadeia pesada de imunoglobulina é um fenômeno que ocorre precocemente durante a ontogênese do sistema linfóide B, permitindo a aproximaçäo da regiäo variável (VH) da regiäo juncional (JH, as quais flanqueiam a regiäo de diversidade (DH), de tal modo que o fragmento (VHDHJH, originado desse rearranjo torna-se acessível à amplificaçäo pela reaçäo em cadeia da polimerase (PCR). A partir de linfócitos de sangue periférico de 7 pacientes portadores de LLC, utilizando 2 "primers" complementares a sítios conservados das regiöes VH e JH, foi amplificado um fragmento que após eletroforese em gel de poliacrilamida a 12,5 por cento e coloraçäo pela prata, mostrou ser monoclonal. A presença dessa banda monoclonal foi mantida em diluiçöes sequenciais, as quais envolveram a mistura do DNA tumoral com DNA normal, até inclusive o nível de 1 por cento de DNA tumoral. A técnica da PCR revelada pela prata, mostrou-se sensível na detecçäo de monoclonalidade em pacientes portadores de LLC, sem necessidade do uso de sondas.


Subject(s)
Humans , Male , Female , Middle Aged , Leukemia, Lymphocytic, Chronic, B-Cell/genetics , Lymphocytes/immunology , Polymerase Chain Reaction , DNA Primers , Gene Amplification , Leukemia, Lymphocytic, Chronic, B-Cell/blood
5.
Indian J Cancer ; 1992 Jun; 29(2): 49-55
Article in English | IMSEAR | ID: sea-49312

ABSTRACT

Bleeding time, clot retraction, platelet factor 3 availability and platelet aggregation in response to ADP, epinephrine, collagen and ristocetin were studied in 12 cases of chronic leukemia which included eight of chronic myeloid leukemia, two of chronic lymphatic leukemia and two of CLL related disorders. One or more abnormalities in platelet function were detected in all the cases. Among the cases of CML, bleeding time was prolonged in one, clot retraction was impaired in one and PF3 availability was decreased in one case. Defects in platelet aggregation were variable. Among the cases of CLL and CLL related disorders, bleeding time was prolonged in two, clot retraction was impaired in one and PF3 availability was decreased in three cases. Platelet aggregation responses were significantly impaired in all the cases.


Subject(s)
Blood Platelets/physiology , Chronic Disease , Humans , Leukemia, Lymphocytic, Chronic, B-Cell/blood , Leukemia, Myeloid/blood , Platelet Function Tests
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