The Role of PI3/Akt Pathway in the Protective Effect of Insulin against Corticosterone Cell Death Induction in Hippocampal Cell Culture
Maryam Moosavi, Nader Maghsoudi, Saleh Zahedi-Asl, Nasser Naghdi, Mitra Yousefpour, Ian Andrew Trounce
NEUROENDOCRINOLOGY | KARGER | Published : 2008
Corticosterone induces neuroanatomical and neurochemical changes in the hippocampus that are associated with cognitive impairments. In the present study corticosterone induced cell death in primary hippocampal neurons cultured in Neurobasal + B27 medium. Insulin prevents neuronal cell death induced in a concentration dependent manner. The neuroprotective effect of insulin was reversed by LY294002, a phosphatidylinositol 3'-kinase (PI3 kinase) inhibitor, whereas the mitogen-activated protein kinase (MAPK) inhibitor PD98059, an upstream blocker of MAPK had no effect. Western blot analyses showed that insulin induced the activation of protein kinase B (Akt). These results suggest that insulin c..View full abstract
This work was supported by a grant from the Neuroscience Research Center of Shahid Beheshti University, M. C.