Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2009.1156.1159SafariM. GhahariL. 1220091216The aim of this study was to study the changes of inducible and constitutive Nitric Oxide Synthase (NOS) after brain injury. In order to brain injury 42 wistar rats were submitted and divided in 7 groups. Nitric oxide synthase activities were assayed at different times after injury. Present results showed that a significant increase of iNOS and cNOS activity 8 h after lesion. In conclusion, both isoformes of NOS increase at different time after brain injury.]]>Bredt, D.S. and S.H. Synder,199087682685Cherian, L., J.C. Goodman and C.S. Robertson,20008321712178Clark, R.S., P.M. Kochanek, M.A. Schwarz, J.K. Schiding and D.C. Turner et al.,199639784790Dewitt, D.S., T.G. Smith, D.J. Deyo, K.R. Miller, T. Uchida and D.S. Prough,199714223233Delwing, D., D. Delwing, C.S. Bavaresco and A. Wyse,20081193120127Diaz- Ruiz, A., A. Ibarra, F.P. Severiano, G.C. Sahagun, I. Grijvalva and C. Rios,2002319129132Diaz-Ruiz, A., H. Salgado-Ceballos, S. Montes, V. Maldonado, L. Tristan, M. Alcaraz-Zubeldia and C. Rios,2007325763Dinerman, J.L., T.M. Dawson, M.J. Schell, A. Snowman and S.H. Snyder,19949142144218Ficker, E., M. Taglialatela, B.A. Wible, C.M. Henley and A.M. Brown,199426610681072Gham, C., S. Holmins and T. Mathiesen,20025013191326Henley, C.M., C. Muszynski, L. Cherian and C.S. Robertson,199613487496Hierholzer, C., B. Herbrecht, J. Menezes, J. Kane and J. MacMicking et al.,1998187917928Huttemann, M., I. Lee, C.W. Kreipke and T. Petrov,2008151148154Hu, W.H., F. Li, W. Qiang, H.Y. Wang and G.Q. Wang et al.,1992121224Leone, A.M., R.M., Palmer, R.G. Knowles, P.L. Francis, D.S. Ashton and S. Moncada,19912662379023795Hu, W.H., F. Li, W.A. Qiang, F. Li and M.F. Jen et al.,200817183197Liu, D., W. Thangnipon and D.J. Mc Adoo,1991547344348Lowry, O.H., H.T. Graham, F.B. Harris, M.K. Priebat, A.R. Marks and R.U. Bragma,1954112116126Martinez-Murillo, R., A.P. Fernandez, J. Serrano, J. Rodrigo, E. Salas, M. Mourelle and A. Martinez,2007415149153Matsumoto, T., J.S. Pollock, M. Nakane and U. Forstermann,199373199203Paxinos, G. and C. Watson,20055th Edn.,Sakomoto, K.I., H. Fujisawa, H. Koizomi, E. Tsuchida, H. Ito, D. Sadamitsu and T. Maekawa,199714349353Sardo, P., G.D. Ferraro, G. Giovanni, S. Galati and V. La Grutta,2002325179182Sparapani, M., R.O. Dall, O. Gandolfi, E. Ciani and A. Contestabile,1997148157166Xu, M., Y.K. Ng and S.K. Leong,2000161472480Yamada, K. and T. Nabeshima,19976812341243Ziaja, M., J. Payka, A. Machowska and P.M. Plonka,20072418451854