Abstract
The protective role of cyclophosphamide was studied in this work. Young male Calomys callosus were infected with Trypanosoma cruzi and allowed to age. Cyclophosphamide therapy was administered to animals during acute and late chronic phases of infection. Esophageal neurons were counted, displaying enhanced neuronal loss for the young and treated infected groups. For aged and cyclophosphamide treated animals, a protection was observed through a reduced loss of neurons as compared to the young and infected groups. Enhanced nitric oxide concentrations were observed for young animals as compared to aged counterparts. Splenocyte proliferation was reduced during the acute phase in comparison with those found in the chronic phase. Morphometry of neuronal body displayed a significant reduction concerning the area, perimeter, diameter and volume for aged animals as compared to young groups. These results indicate that the protective effects of cyclophosphamide together with process of neuroplasty of peripheral nervous system could lead to a protection against neuronal loss.
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