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Memórias do Instituto Oswaldo Cruz

Print version ISSN 0074-0276On-line version ISSN 1678-8060

Mem. Inst. Oswaldo Cruz vol.90 no.4 Rio de Janeiro July/Aug. 1995 

Characterization of T cell clones from chagasic patients: predominance of CD8 surface phenotype in clones from patients with pathology

Washington R. Cuna1 

Celeste Rodriguez Cuna1 

Facultad de Medicina, Instituto Boliviano de Biología de Altura, Departamento de Parasitologia, La Paz, Bolivia


Human Chagas' disease, caused by the protozoan Trypanosoma cruzi, is associated with pathological processes whose mechanisms are not known. To address this question, T cell lines were developed from chronic chagasic patients peripheral blood mononuclear cells (PBMC) and cloned. These T cell clones (TCC) were analyzed phenotypically with monoclonal antibodies by the use of a fluorescence microscope. The surface phenotype of the TCC from the asymptomatic patient were predominantly CD4 positive (86%). On the contrary, the surface phenotype CD8 was predominant in the TCC from the patients suffering from cardiomegaly with right bundle branch block (83%), bradycardia with megacolon (75 %) and bradycardia (75%). Future studies will be developed in order to identify the antigens eliciting these T cell subpopulations.

Key words: Trypanosoma cruzi; T cell clones; asymptomatic; pathology


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