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1.
Arq. neuropsiquiatr ; 67(3a): 633-638, Sept. 2009. ilus
Article in English | LILACS | ID: lil-523611

ABSTRACT

We previously demonstrated correlation between parasympathetic dysfunction and brain white matter lesions in chronic chagasic patients. OBJECTIVE: To correlate serum functional circulating antibodies with beta adrenergic (Ab-β), muscarinic (Ab-M) or muscarinic and beta adrenergic (Ab-Mβ) activity, the autonomic system function and brain lesions in chronic chagasic patients. METHOD: In fifteen consecutive chagasic patients, the autonomic nervous system was evaluated and brain magnetic resonance imaging (MRI) was performed. The sera of all patients were tested to the presence of circulating functional antibodies. RESULTS: Sera from 11 of 15 chronic chagasic patients had some activity (Ab-β: 7; Ab-M: 1; Ab-Mβ: 3); however, there was no significant correlation between the presence of antibodies and the autonomic system function or the presence of hyperintensities in MRI. CONCLUSION: The mechanism involved in the genesis of hyperintense lesions seen in brain MRI of chronic chagasic patients is still unresolved, although apparently related to parasympathetic dysfunction.


A correlação entre disfunção parassimpática e lesões de substância branca cerebral em pacientes chagásicos já foi previamente demonstrada. OBJETIVO: Correlacionar a presença de anticorpos circulantes funcionais com atividade beta-adrenérgica (Ab-β), muscarínica (Ab-M) ou muscarínica e beta adrenérgica (Ab-Mβ), a presença de disautonomia e lesões de substância branca cerebral em pacientes chagásicos crônicos. MÉTODO: Em quinze pacientes chagásicos consecutivos, foram realizados a avaliação do sistema nervoso autônomo e ressonância magnética (RM) do crânio. O soro dos pacientes foi testado para a presença de anticorpos funcionais circulantes. RESULTADOS: O soro de 11 dos 15 pacientes chagásicos apresentou alguma atividade (Ab-β: 7; Ab-M: 1; Ab-Mβ: 3); porém não houve correlação significativa entre a presença de anticorpos circulantes e disautonomia ou de hiperintensidades à RM. CONCLUSÃO: O mecanismo envolvido na gênese das lesões hiperintensas à RM do crânio dos pacientes chagásicos crônicos não está esclarecida ainda, apesar de aparentemente relacionada à disfunção parassimpática.


Subject(s)
Animals , Female , Humans , Male , Middle Aged , Rabbits , Autonomic Nervous System Diseases , Autoantibodies/blood , Brain , Chagas Disease , Receptors, Adrenergic, beta/immunology , Receptors, Muscarinic/immunology , Autonomic Nervous System Diseases/immunology , Autonomic Nervous System Diseases/pathology , Autonomic Nervous System Diseases/physiopathology , Brain/immunology , Brain/pathology , Chronic Disease , Chagas Disease/immunology , Chagas Disease/pathology , Chagas Disease/physiopathology , Prospective Studies , Trypanosoma cruzi
2.
Rev. Soc. Bras. Med. Trop ; 29(4): 331-9, Jul.-Aug. 1996. tab, graf, ilus
Article in Portuguese | LILACS | ID: lil-187152

ABSTRACT

In this paper, we sought to determine if chronic chagasic patients with cardiopathy could be distinguished from those displaying non-chagasic cardiopathy on the basis of T cell proliferative responses to cruzipain (GP57/51), a major antigen of T. cruzi. Assays were performed with peripheral blood mononuclear cells from 24 individuals classified as follows: normal donors (n = 8), patients with non-chagasic cardiopathy (n = 8), patients with chronic chagasic cardiopathy without morbid associations (n = 8). The analysis of variance indicated that the proliferative responses stimulated by cruzipain were significantly higher in the group of chagasic patients (p = 0.0001). Turkey's multiple comparison test showed that the proliferative index medium from normal and non-chagasic cardiopathy was not significantly different from each other. We conclude that the T cell responses against T. cruzipain, as measured by proliferative indices of cells found in peripheral blood, are exclusively associated with Chagas, disease. In view of the abundance of cruzipain antigen in amastigotes it is possible that these T cell specificities contribute to the heart tissue damage observed in chronic Chagas, disease patients.


Subject(s)
Humans , Animals , Male , Female , Adult , Middle Aged , Antigens, Protozoan/immunology , Cysteine Proteases/immunology , Chagas Cardiomyopathy/immunology , T-Lymphocytes/immunology , Trypanosoma cruzi/immunology , Analysis of Variance , Cells, Cultured , Chronic Disease , Ventricular Dysfunction, Left/immunology , Epitopes, T-Lymphocyte/immunology , Immunity, Cellular
3.
Rev. Soc. Bras. Med. Trop ; 26(3): 163-74, jul.-set. 1993. tab, graf
Article in Portuguese | LILACS | ID: lil-141282

ABSTRACT

Vários trabalhos com eletrocardiograma na doença de Chagas têm sido feitos. Alguns referindo-se a grupos selecionados de casos, outros a estudos longitudinais, relatam as características da mortalidade nas diversas fases da doença. Com o objetivo de avaliar o valor do eletrocardiograma como índice de avaliaçäo terapêutica e de seu comportamento na doença de Chagas desde a fase aguda, no presente trabalho, analisou-se evolutivamente o eletrocardiograma de 42 pacientes (18 mulheres e 24 homens) procedentes da zona rural do Norte de Minas Gerais; predomínio etário foi nas duas primeiras décadas; todos com comprometimento cardíaco; todos receberam tratamento específico. O acompanhamento dos 42 pacientes foi de 9 anos dos quais 3 pacientes tiveram seguimento de 20 anos. Foram analisados 270 eletrocardiogramas. Nós utilizamos os seguiente critérios para a análise do ECG: código de Minnesota modificado para doença de Chagas; WHO/I.S.F.C.TASK FORCE para conduçäo intraventricular e critérios de Pieretti para área eletricamente inativa. Concluímos que as alteraçöes eletrocardiográficas agravam com a evoluçäo da doença e que o eletrocardiograma näo serve de índice de avaliaçäo terapêutica


Subject(s)
Infant , Child, Preschool , Child , Adolescent , Adult , Middle Aged , Humans , Male , Female , Chagas Disease/diagnosis , Electrocardiography , Acute Disease , Age Distribution , Brazil/epidemiology , Chronic Disease , Chagas Disease/epidemiology , Chagas Disease/therapy , Electrocardiography , Follow-Up Studies , Longitudinal Studies , Rural Population/statistics & numerical data
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