Abstract
This study was carried out to examine the development of acute myocarditis in Trypanosoma cruzi-infected BALB/c mice after they were treated with low doses of cylophosphamide or gamma irradiation. It has been claimed that, in mice, such treatments temporarily interfere with the host-immune suppressor network, but cause no immunodepression. A severe extensive and diffuse acute myocarditis developed in the treated mice infected with T. cruzi, whereas a slight to moderate focal or occasionally diffuse acute myocarditis developed in control mice infected with T. cruzi. It is very likely that the transient abolition of T-suppressor activity facilitates the anti-myocardium immune response in the acute phase of experimental Chagas' disease in mice.
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- Andrade Z. A., Andrade S. G., Sadigursky M. Enhancement of chronic Trypanosoma cruzi myocarditis in dogs treated with low doses of cyclophosphamide. Am J Pathol. 1987 Jun;127(3):467–473. [PMC free article] [PubMed] [Google Scholar]
- Andrade Z. A. Mechanisms of myocardial damage in Trypanosoma cruzi infection. Ciba Found Symp. 1983;99:214–233. doi: 10.1002/9780470720806.ch12. [DOI] [PubMed] [Google Scholar]
- Askenase P. W., Hayden B. J., Gershon R. K. Augmentation of delayed-type hypersensitivity by doses of cyclophosphamide which do not affect antibody responses. J Exp Med. 1975 Mar 1;141(3):697–702. doi: 10.1084/jem.141.3.697. [DOI] [PMC free article] [PubMed] [Google Scholar]
- BRENER Z. Therapeutic activity and criterion of cure on mice experimentally infected with Trypanosoma cruzi. Rev Inst Med Trop Sao Paulo. 1962 Nov-Dec;4:389–396. [PubMed] [Google Scholar]
- Camargo M. E. Fluorescent antibody test for the serodiagnosis of American trypanosomiasis. Technical modification employing preserved culture forms of Trypanosoma cruzi in a slide test. Rev Inst Med Trop Sao Paulo. 1966 Sep-Oct;8(5):227–235. [PubMed] [Google Scholar]
- Gill H. K., Dhaliwal J. S., Sukumaran K. D., Liew F. Y. Effect of irradiation on the precursor, activated and memory suppressor T cells for delayed-type hypersensitivity to sheep erythrocytes in mice. Immunology. 1984 Dec;53(4):669–675. [PMC free article] [PubMed] [Google Scholar]
- Howard J. G., Hale C., Liew F. Y. Immunological regulation of experimental cutaneous leishmaniasis. IV. Prophylactic effect of sublethal irradiation as a result of abrogation of suppressor T cell generation in mice genetically susceptible to Leishmania tropica. J Exp Med. 1981 Mar 1;153(3):557–568. doi: 10.1084/jem.153.3.557. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Köberle F. Chagas' disease and Chagas' syndromes: the pathology of American trypanosomiasis. Adv Parasitol. 1968;6:63–116. doi: 10.1016/s0065-308x(08)60472-8. [DOI] [PubMed] [Google Scholar]
- Lagrange P. H., Mackaness G. B., Miller T. E. Potentiation of T-cell-mediated immunity by selective suppression of antibody formation with cyclophosphamide. J Exp Med. 1974 Jun 1;139(6):1529–1539. doi: 10.1084/jem.139.6.1529. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Rossi M. A., Gonçalves S., Ribeiro-dos-Santos R. Experimental Trypanosoma cruzi cardiomyopathy in BALB/c mice. The potential role of intravascular platelet aggregation in its genesis. Am J Pathol. 1984 Feb;114(2):209–216. [PMC free article] [PubMed] [Google Scholar]
- Schwartz A., Askenase P. W., Gershon R. K. Regulation of delayed-type hypersensitivity reactions by cyclophosphamide-sensitive T cells. J Immunol. 1978 Oct;121(4):1573–1577. [PubMed] [Google Scholar]
- Teixeira A. R., Teixeira G., Macêdo V., Prata A. Trypanosoma cruzi-sensitized T-lymphocyte mediated 51CR release from human heart cells in Chagas' disease. Am J Trop Med Hyg. 1978 Nov;27(6):1097–1107. doi: 10.4269/ajtmh.1978.27.1097. [DOI] [PubMed] [Google Scholar]
- Turk J. L., Parker D., Poulter L. W. Functional aspects of the selective depletion of lymphoid tissue by cyclophosphamide. Immunology. 1972 Oct;23(4):493–501. [PMC free article] [PubMed] [Google Scholar]

