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Stroke and brain atrophy in chronic Chagas disease patients: A new theory proposition

Abstract

Chagas disease (CD) remains a major cause of cardiomyopathy and stroke in developing countries. Brain damage in CD has been attributed exclusively to the effects of structural heart disease on the brain, including cardioembolism and low cardiac output symptoms. However, CD patients also develop stroke and brain atrophy independently of cardiac disease severity. Chronic inflammation directed against T. cruzi may act as a trigger for endothelial damage, platelet activation, acceleration of atherosclerosis and apoptosis, all of which lead to stroke and brain atrophy. In the present article, evidence supporting this new theory is presented, along with considerations towards mechanistically-based targeted treatment.

Key words:
Chagas disease; American trypanosomiasis; cognition; cerebrovascular disorders; pathogenesis.

Resumo

A doença de Chagas (DC) permanence uma causa importante de cardiomiopatia e acidente vascular cerebral em países em desenvolvimento. A lesão cerebral na DC tem sido atribuída aos efeitos da doença cardíaca estrutural no cérebro, incluindo cardioembolia e sintomas de baixo débito cardíaco. No entanto, pacientes com DC desenvolvem acidente vascular cerebral e atrofia cerebral independentemente da gravidade da cardiomiopatia. Inflamação crônica direcionada contra o T. cruzi pode agir como desencadeante de lesão endotelial, ativação plaquetária, aceleração de aterosclerose e apoptose, todos predispondo a acidente vascular cerebral e atrofia cerebral. Nesse artigo, as evidências que dão suporte a esta nova teoria são apresentadas, juntamente com argumentos direcionados a um tratamento baseado no mecanismo do dano cerebral.

Palavras-chave:
doença de Chagas; Tripanossomíase americana; cognição; doenças cerebrovasculares; patogênese.

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Publication Dates

  • Publication in this collection
    Jan-Mar 2009

History

  • Received
    11 Jan 2009
  • Accepted
    12 Feb 2009
Academia Brasileira de Neurologia, Departamento de Neurologia Cognitiva e Envelhecimento R. Vergueiro, 1353 sl.1404 - Ed. Top Towers Offices, Torre Norte, São Paulo, SP, Brazil, CEP 04101-000, Tel.: +55 11 5084-9463 | +55 11 5083-3876 - São Paulo - SP - Brazil
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