Abstract
Monoclonal antibodies of the Orthoclone series were used to identify total T lymphocytes (OKT3) and their helper-inducer (OKT4) and cytotoxic-suppressor (OKT8) subsets in 25 patients with chronic Chagas' disease and 25 healthy controls. No significant difference in the number of total T cells (OKT3 +) circulating in the peripheral blood of patients and controls was found. However, in contrast to normal subjects, chagasic patients show quantitative alterations in both helper (OKT4 +) and suppressor (OKT8 +) T cell subsets. The chagasic patients have abnormal helper/suppressor ratios, with low and high values scattered around the mean. Surprisingly, high ratios were found within females while almost all males have low ratio values. These findings suggest that the putative immunoregulatory disfunctions in patients with chronic chagasic cardiomyopathy may involve both helper and suppressor T cell subsets.
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