| Journal: | Memorias do Instituto Oswaldo Cruz |
| Database: | PERIÓDICA |
| System number: | 000413839 |
| ISSN: | 0074-0276 |
| Authors: | Irion, Camila Iansen1 Paredes, Bruno Diaz1 Brasil, Guilherme Visconde1 Cunha, Sandro Torrentes da1 Paula, Luis Felipe1 Carvalho, Alysson Roncally1 Carvalho, Antonio Carlos Campos de1 Goldenberg, Regina Coeli dos Santos1 Carvalho, Adriana Bastos;1 |
| Institutions: | 1Universidade Federal do Rio de Janeiro, Rio de Janeiro. Brasil |
| Year: | 2017 |
| Season: | Ago |
| Volumen: | 112 |
| Number: | 8 |
| Pages: | 551-560 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | Chagas disease is a public health problem caused by infection with the protozoan Trypanosoma cruzi. There is currently no effective therapy for Chagas disease. Although there is some evidence for the beneficial effect of bone marrow-derived cells in chagasic disease, the mechanisms underlying their effects in the heart are unknown. Reports have suggested that bone marrow cells are recruited to the chagasic heart; however, studies using chimeric mouse models of chagasic cardiomyopathy are rare. OBJECTIVES The aim of this study was to investigate the migration of bone marrow cells to the heart after T. cruzi infection in a model of chagasic disease in chimeric mice. METHODS To obtain chimerical mice, wild-type (WT) C57BL6 mice were exposed to full body irradiation (7 Gy), causing bone marrow ablation. Then, bone marrow cells from green fluorescent protein (GFP)-transgenic mice were infused into the mice. Graft effectiveness was confirmed by flow cytometry. Experimental mice were divided into four groups: (i) infected chimeric (iChim) mice; (ii) infected WT (iWT) mice, both of which received 3 × 104 trypomastigotes of the Brazil strain; (iii) non-infected chimeric (Chim) mice; and (iv) non-infected WT mice. FINDINGS At one-month post-infection, iChim and iWT mice showed first degree atrioventricular block with decreased heart rate and treadmill exercise parameters compared to those in the non-infected groups. MAIN CONCLUSIONS iChim mice showed an increase in parasitaemia, myocarditis, and the presence of amastigote nests in the heart tissue compared to iWT mice. Flow cytometry analysis did not detect haematopoietic progenitor cells in the hearts of infected mice. Furthermore, GFP+ cardiomyocytes were not detected in the tissues of chimeric mice |
| Disciplines: | Medicina |
| Keyword: | Medicina experimental, Microbiología, Enfermedad de Chagas, Médula ósea, Migración celular, Corazón, Modelos animales, Ratones |
| Keyword: | Medicine, Experimental medicine, Microbiology, Chagas disease, Bone marrow, Cell migration, Heart, Animal models, Mice |
| Full text: | Texto completo (Ver HTML) |
