Facultad de Ciencias de la Vida

URI permanente para esta comunidad

http://repositorio.unab.cl//handle/ria/2068

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En 2018 se fusionan la Facultad de Ciencias Biológicas, con la Facultad de Ecología y Recursos Naturales y se crea la Facultad de Ciencias de la Vida (Fac.CV)

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Examinando Facultad de Ciencias de la Vida por Materia "17β-estradiol"

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    TRPV1-Estradiol Stereospecific Relationship Underlies Cell Survival in Oxidative Cell Death
    (Frontiers Media S.A., 2020-05) Ramírez Barrantes, R.; Carvajal Zamorano K., K.; Rodríguez, B.; Córdova, C.; Lozano, C.; Simón, F.; Díaz, P.; Muñoz, P.; Marchant, I.; Latorre, R.; Castillo, K.; Olivero, P.
    17β-estradiol is a neuronal survival factor against oxidative stress that triggers its protective effect even in the absence of classical estrogen receptors. The polymodal transient receptor potential vanilloid subtype 1 (TRPV1) channel has been proposed as a steroid receptor implied in tissue protection against oxidative damage. We show here that TRPV1 is sufficient condition for 17β-estradiol to enhance metabolic performance in injured cells. Specifically, in TRPV1 expressing cells, the application of 17β-estradiol within the first 3 h avoided H2O2-dependent mitochondrial depolarization and the activation of caspase 3/7 protecting against the irreversible damage triggered by H2O2. Furthermore, 17β-estradiol potentiates TRPV1 single channel activity associated with an increased open probability. This effect was not observed after the application of 17α-estradiol. We explored the TRPV1-Estrogen relationship also in primary culture of hippocampal-derived neurons and observed that 17β-estradiol cell protection against H2O2-induced damage was independent of estrogen receptors pathway activation, membrane started and stereospecific. These results support the role of TRPV1 as a 17β-estradiol-activated ionotropic membrane receptor coupling with mitochondrial function and cell survival. © Copyright © 2020 Ramírez-Barrantes, Carvajal-Zamorano, Rodriguez, Cordova, Lozano, Simon, Díaz, Muñoz, Marchant, Latorre, Castillo and Olivero.