Spatial temporal characteristics of Cortical Reorganization after Spinal Cord In...
Spatial temporal characteristics of Cortical Reorganization after Spinal Cord Injury and the role of interneurons and astrocytes
Spinal cord injury (SCI) is followed by functional reorganization of the primary somatosensory cortex (S1), in which the S1 area deprived of inputs is activated by sensory stimulation of surrounding intact regions. Recent data sug...
Spinal cord injury (SCI) is followed by functional reorganization of the primary somatosensory cortex (S1), in which the S1 area deprived of inputs is activated by sensory stimulation of surrounding intact regions. Recent data suggest that reorganization after SCI is a heterogeneous process depending on the time elapsed after injury and the cortical layer under study. This research proposal aims to study the complexity of the cortical reorganization after SCI in terms of spatial-temporal patterns and the involvement of distinct cell types as inhibitory interneurons and astrocytes. This will be achieved by monitoring and manipulating brain activity using in vivo and in vitro electrophysiology, genetically encoded calcium indicators (GCaMP6), chemogenetics (DREADDs) and transgenic mice. A mice model of thoracic SCI will be used throughout the study. First, reorganization of the hindlimb and forelimb S1 cortex at different time points after the injury will be studied by recording in vivo neuronal activity in response to sensory stimulation across all layers of S1 using a vertical multielectrode array. Second, changes in inhibitory transmission induced by SCI will be studied by monitoring intracellular Ca2+ signaling and by in vitro electrophysiology from GFP expressing GABAergic cells. Third, the role of astrocytes in the reorganization after SCI will be studied by using either Gq DREADD to enhance astrocyte activity or IP2R2-/- mice to decrease astrocyte activity while recording in vivo neuronal responses across all layers of S1. Changes in astrocyte activity after SCI will also be determined by monitoring intracellular Ca2+ signals from astrocytes expressing the calcium indicator GCaMP6. Results from this proposal will be a first in understanding the complex network of local plasticity in S1 both in control conditions and after SCI. It will be also relevant to design new therapies for SCI-associated pathologies as neuropathic pain.ver más
Seleccionando "Aceptar todas las cookies" acepta el uso de cookies para ayudarnos a brindarle una mejor experiencia de usuario y para analizar el uso del sitio web. Al hacer clic en "Ajustar tus preferencias" puede elegir qué cookies permitir. Solo las cookies esenciales son necesarias para el correcto funcionamiento de nuestro sitio web y no se pueden rechazar.
Cookie settings
Nuestro sitio web almacena cuatro tipos de cookies. En cualquier momento puede elegir qué cookies acepta y cuáles rechaza. Puede obtener más información sobre qué son las cookies y qué tipos de cookies almacenamos en nuestra Política de cookies.
Son necesarias por razones técnicas. Sin ellas, este sitio web podría no funcionar correctamente.
Son necesarias para una funcionalidad específica en el sitio web. Sin ellos, algunas características pueden estar deshabilitadas.
Nos permite analizar el uso del sitio web y mejorar la experiencia del visitante.
Nos permite personalizar su experiencia y enviarle contenido y ofertas relevantes, en este sitio web y en otros sitios web.