Role Of Trypanosoma Cruzi Peroxiredoxins In Mitochondrial Bioenergetics

Trypanosoma cruzi cytosolic (TcCPx) and mitochondrial tryparedoxin peroxidase (TcMPx) play a fundamental role in H 2O 2 detoxification. Herein, mitochondrial bioenergetics was evaluated in cells that overexpressed TcCPx (CPx) and TcMPx (MPx) and in pTEX. In MPx, a higher expression was observed for TcCPx, and the same correlation was true for CPx. Differences in H 2O 2 release among the overexpressing cells were detected when the mitochondrial respiratory chain was inhibited using antimycin A or thenoyltrifluoroacetone. MPx had higher O 2 consumption rates than pTEX and CPx, especially in the presence of oligomycin. In all of the cells, the mitochondrial membrane potential and the ATP levels were similar. Because of the mild uncoupling that was observed in MPx, the presence or induction of a proton transporter in the mitochondrial membrane is suggested when TcMPx is expressed at higher levels. Our results show a possible interplay between the cytosolic and mitochondrial antioxidant systems in a trypanosomatid. © Springer Science+Business Media, LLC 2011.434419424Barros, M.H., Bandy, B., Tahara, E.B., Kowaltowski, A.J., (2004) J Biol Chem, 279, pp. 49883-49888Boveris, A., Stoppani, A.O.M., (1977) Experientia, 33, pp. 1306-1308Boveris, A., Sies, H., Martino, E.E., Docampo, R., Turrens, J.F., Stoppani, A.O., (1980) Biochem J, 188, pp. 643-648Cadenas, E., (2004) Mol Asp Med, 25, pp. 17-26Castellani, O., Ribeiro, L., Fernandes, F., (1967) J Protozool, 14, pp. 447-451Castro, H., Sousa, C., Santosm, N., Budde, H., Cordeiro-Da-Silva, A., Flohé, L., Tomás, A.M., (2004) Mol Biochem Parasitol, 36, pp. 137-147Castro, H., Romao, S., Carvalho, S., Teixeira, F., Sousa, C., Tomás, A.M., (2010) PLoS One, 5 (E1), p. 2607Jms, D., Lowry, C.V., Kja, D., (1995) Arch Biochem Biophys, 317, pp. 1-6Facundo, H.T., De Paula, J.G., Kowaltowski, A.J., (2007) Free Radical Biol Med, 42, pp. 1039-1048Finzi, J.K., Chiavegatto, C.W., Corat, K.F., Lopez, J.A., Cabrera, O.G., Mielniczki-Pereira, A.A., Colli, W., Gadelha, F.R., (2004) Mol Biochem Parasitol, 133, pp. 37-43Hernandez, F., Turrens, J., (1998) Mol Biochem Parasitol, 93, pp. 135-137Jo, S.H., Son, M.K., Koh, H.J., Lee, S.M., Song, I.H., Kim, Y.O., Lee, Y.S., Huh, T.L., (2001) J Biol Chem, 276, pp. 16168-16176Kowaltowski, A.J., Costa, A.D., Vercesi, A.E., (1998) FEBS Lett, 425, pp. 213-216Kowaltowski, A., Souza-Pinto, N., Castilho, R., Vercesi, A., (2009) Free Radical Biol Med, 47, pp. 333-343Mehta, A., Shaha, C., (2004) J Biol Chem, 279, pp. 117798-117813Meziane-Cherif, D., Kmi, A., Sergheraert, C., Tartar, A., Dubremetz, J.F., Ouaissi, M.A., (1994) Exp Parasitol, 79, pp. 536-541Mielniczki-Pereira, A., Chiavegatto, C., Lopez, J., Colli, W., Alves, M.J., Gadelha, F.R., (2007) Acta Trop, 101, pp. 54-60Monteiro, G., Kowaltowski, A.J., Barros, M.H., Netto, L.E., (2004) Arch Biochem Biophys, 425, pp. 14-24Nogueira, F.B., Krieger, M.A., Nirdé, P., Goldenberg, S., Romanha, A.J., Smf, M., (2006) Acta Trop, 100, pp. 119-132Piacenza, L., Irigoin, F., Alvarez, M.N., Peluffo, G., Taylor, M., Kelly, J., Wilkinson, S.R., Radi, R., (2007) Biochem J, 403, pp. 323-334Piacenza, L., Peluffo, G., Alvarez, M.N., Kelly, J.M., Wilkinson, S.R., Radi, R., (2008) Biochem J, 410, pp. 359-368Piacenza, L., Zago, M.P., Peluffo, G., Alvarez, M.N., Basombrio, M.A., Radi, R., (2009) Int J Parasitol, 39, pp. 1455-1464Piñeyro, M.D., Parodi-Talice, A., Arcari, T., Robello, C., (2008) Gene, 408, pp. 45-50Prathalingham, S.R., Wilkinson, S.R., Horn, D., Kelly, J.M., (2007) Antimicrob Agents Chemother, 51, pp. 755-758Tian, W., Brausntein, L.D., Pang, J., Stuhlmeier, K.M., Xi, Q., Tian, X., Stanton, R.C., (1998) J Biol Chem, 273, pp. 10609-10617Vercesi, A.E., Bernardes, C.F., Hoffmann, M.E., Gadelha, F.R., Docampo, R., (1991) J Biol Chem, 266, pp. 14431-14434Vercesi, A.E., Hoffmann, M.E., Bernardes, C.F., Docampo, R., (1993) J Med Braz Biol Res, 26, pp. 355-363Vercesi, A.E., Kowaltowski, A.J., Oliveira, H.C., Castilho, R.F., (2006) Front Biosci, 11, pp. 2554-2564Wiese, A.G., Pacifici, R.E., Davies, K.J., (1995) Arch Biochem Biophys, 318, pp. 231-240Wilkinson, S.R., Temperton, N.J., Mondragon, A., Kelly, J.M., (2000) J Biol Chem, 275, pp. 8220-8225Wilkinson, S.R., Meyer, D.J., Taylor, M.C., Bromley, E.V., Miles, M.A., Kelly, J.M., (2002) J Biol Chem, 277, pp. 17062-17071Wilkinson, S.R., Horn, D., Prathalingam, S.R., Kelly, J.M., (2003) J Biol Chem, 278, pp. 31640-31646Wilkinson, S.R., Taylor, M.C., Horn, D., Kelly, J.M., Cheeseman, I., (2008) PNAS, 105, pp. 5022-502