BACKGROUND: Akt is activated by phosphorylation and plays an important role in cell survival and maintenance of structure. METHODS: We investigated whether phosphorylated Akt was characteristically expressed in human endometrium in vivo and whether insulin-like growth factor-I (IGF-I) can activate Akt using cultured decidualized human stromal cells in vitro, using immunohistochemistry and Western blotting analysis. RESULTS: The levels of phosphorylated Akt protein increased markedly in the decidual tissues from ectopic pregnancy. The expression of phosphorylated Akt protein in stromal cells increased with the decidualization. The decidual cells showed strong cytoplasmic staining for phosphorylated Akt. However, cultured decidualized human stromal cells diminished phosphorylated Akt expression compared to control cells. IGF-I administration to decidualized human stromal cells significantly recovered pAkt expression. The effect of IGF-I on decidualized human stromal cells was blocked by an inhibitor of phosphatidylinositol-3 kinase (PI3K) (LY294,002). These results suggest that IGF-I may activate Akt via PI3K in human endometrium and decidua. The expression of phosphorylated Akt in stromal cells was only detected in the functional layer, where tissue remodelling occurs during menstruation or implantation. CONCLUSIONS: Akt activation may be involved in cell survival and extracellular matrix remodelling in human endometrium and decidua.
BACKGROUND:Akt is activated by phosphorylation and plays an important role in cell survival and maintenance of structure. METHODS: We investigated whether phosphorylated Akt was characteristically expressed in human endometrium in vivo and whether insulin-like growth factor-I (IGF-I) can activate Akt using cultured decidualized human stromal cells in vitro, using immunohistochemistry and Western blotting analysis. RESULTS: The levels of phosphorylated Akt protein increased markedly in the decidual tissues from ectopic pregnancy. The expression of phosphorylated Akt protein in stromal cells increased with the decidualization. The decidual cells showed strong cytoplasmic staining for phosphorylated Akt. However, cultured decidualized human stromal cells diminished phosphorylated Akt expression compared to control cells. IGF-I administration to decidualized human stromal cells significantly recovered pAkt expression. The effect of IGF-I on decidualized human stromal cells was blocked by an inhibitor of phosphatidylinositol-3 kinase (PI3K) (LY294,002). These results suggest that IGF-I may activate Akt via PI3K in human endometrium and decidua. The expression of phosphorylated Akt in stromal cells was only detected in the functional layer, where tissue remodelling occurs during menstruation or implantation. CONCLUSIONS:Akt activation may be involved in cell survival and extracellular matrix remodelling in human endometrium and decidua.
Authors: A Villavicencio; A Goyeneche; C Telleria; K Bacallao; F Gabler; A Fuentes; M Vega Journal: Gynecol Oncol Date: 2009-07-23 Impact factor: 5.482
Authors: Romina Fornes; Paulina Ormazabal; Carlos Rosas; Fernando Gabler; David Vantman; Carmen Romero; Margarita Vega Journal: Mol Med Date: 2009-12-04 Impact factor: 6.354
Authors: Yanira Franco-Murillo; José Antonio Miranda-Rodríguez; Erika Rendón-Huerta; Luis F Montaño; Gerardo Velázquez Cornejo; Lucila Poblano Gómez; Francisco Javier Valdez-Morales; Ignacio Gonzalez-Sanchez; Marco Cerbón Journal: Reprod Sci Date: 2014-09-06 Impact factor: 3.060