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Intracellular cytokine expression characteristics of activated T lymphocytes in patients with acute myeloid leukemia / 中国实验血液学杂志
Journal of Experimental Hematology ; (6): 1161-1164, 2007.
Artigo em Chinês | WPRIM | ID: wpr-318767
ABSTRACT
T lymphocytes are an integral part of the effective immune response against various tumors, but they are frequently functionally unresponsive in tumor-bearing patients. This study was aimed to investigate the T lymphocyte function of patients with acute myeloid leukemia (AML) in different status through analyzing intracellular cytokine characteristics of T lymphocytes in AML patients. The T lymphocytes from 18 de nuevo AML patients in different status and 10 healthy controls were stimulated with phorbol 12-myristate 13-acetate (PMA) and ionomycin in the presence of monensin, and were stained with fluorescent McAbs CD4-PITC, CD8-FITC and IFNgamma-PE, ILA-PE, then their T lymphocytes were analyzed by flow cytometry. The results showed that IFN-gamma level in CD4+ and CD8+ T cells of de novo AML patients was significantly lower as compared with healthy controls (p<0.05), while IL-4 level in CD4+ and CD8+ T cells was low too, there was no significant difference between de novo AML patients and healthy controls. In AML patients in clinical remission, IFNgamma level in CD8+ T cells was significantly higher than that in de novo AML patients (p<0.05), but there was no significant difference as compared with healthy controls (p>0.05). In relapsed AML patients, IFNgamma level in CD4+ and CD8+ T cells was significantly lower than that in healthy controls and in AML patients with CR (p<0.05), while IL-4 level was significantly higher than that in healthy controls and de nuevo AML patients (p<0.05). It is concluded that the cytokine secretion in T cell subsets of AML patients in different status is changed. Correspondingly, the Th1/Tc1 level is low after stimulating CD4+ and CD8+ T cells in peripheral blood of de novo AML patients, but not different from healthy controls. Though the Th1 level in T cells of AML patients in complete remission is low, but Tc1 response is even enhanced as high as the healthy controls. The Th2/Tc2-like response of CD4+ and CD8+ T cells in relapsed AML patients obviously increases when compared with Th1/Tc1-like response.
Assuntos
Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Leucemia Mieloide Aguda / Linfócitos T CD4-Positivos / Interleucina-4 / Interferon gama / Linfócitos T CD8-Positivos / Secreções Corporais / Alergia e Imunologia / Metabolismo Limite: Humanos Idioma: Chinês Revista: Journal of Experimental Hematology Ano de publicação: 2007 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Leucemia Mieloide Aguda / Linfócitos T CD4-Positivos / Interleucina-4 / Interferon gama / Linfócitos T CD8-Positivos / Secreções Corporais / Alergia e Imunologia / Metabolismo Limite: Humanos Idioma: Chinês Revista: Journal of Experimental Hematology Ano de publicação: 2007 Tipo de documento: Artigo