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Clinical Microbiology Reviews, April 1999, p. 210-223, Vol. 12, No. 2
0893-8512/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Chagas' Disease and the Autoimmunity Hypothesis

Felipe Kierszenbaum*

Department of Microbiology, Michigan State University, East Lansing, Michigan 48824

The notion that the pathology of Chagas' disease has an autoimmune component was initially based on the finding of circulating antibodies binding heart tissue antigens in patients and mice chronically infected with Trypanosoma cruzi. Later, T lymphocytes reactive with heart or nerve tissue antigens were found in chagasic mice and patients, extending the concept to include cell-mediated immunity. However, there is disagreement about whether the observed immunologic autoreactivities are triggered by T. cruzi epitopes and then affect host tissue antigens by virtue of molecular mimicry or are elicited by host antigens exposed to lymphocytes after tissue damage caused by the parasite. There is also disagreement about the relevance of immunologic autoreactivities to the pathogenesis of Chagas' disease because of the lack of reproducibility of some key reports supporting the autoimmunity hypothesis, conflicting data from independent laboratories, conclusions invalidated by advances in our understanding of the immunologic mechanisms underlying cell lysis, and, last but not least, a lack of direct, incontrovertible evidence that cross-reacting antibodies or autoreactive cells mediate the typical pathologic changes associated with human Chagas' disease. The data and views backing and questioning the autoimmunity hypothesis for Chagas' disease are summarized in this review.

* Mailing address: Department of Microbiology, Michigan State University, East Lansing, MI 48824-1101. Phone: (517) 355-6460. Fax: (517) 353-8957. E-mail: kierszen{at}pilot.msu.edu.

Clinical Microbiology Reviews, April 1999, p. 210-223, Vol. 12, No. 2
0893-8512/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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