Localization of chloride co-transporters in striatal neurons
Por:
Tapia, Dagoberto, Suarez, Paola, Arias-Garcia, Mario A., Garcia-Vilchis, Brisa, Serrano-Reyes, Miguel, Bargas, Jose, Galarraga, Elvira
Publicada:
1 ene 2019
Categoría:
Neuroscience (miscellaneous)
Resumen:
The ionic driving force for the chloride-permeable GABAA receptor is subject to spatial control and distribution of chloride transporters. NKCC1 and KCC2 are mostly expressed in neurons in a specific manner. In the striatum, the localization of these transporters in identified neurons is unknown. In this study, the expression of these transporters was found to be different between projection neurons and interneurons. NKCC1 immunoreactivity was observed in the soma of adult BAC-D1-eGFP+ and D2-eGFP+ striatal projection neurons (SPNs). KCC2 was not expressed in either projection neuron and immunoreactivity to this transporter was observed only in the neuropile. However, NKCC1 and KCC2 co-transporters were not localized in intracellular biocytin-injected dendrites of SPNs of the direct or indirect pathways (D1-SPNs and D2-SPNs). Experiments with PV Cre transgenic mice transfected with Cre-dependent adeno-associated viruses containing tdTomato in the striatum showed a cell-type-specific distribution of KCC2 chloride transporter co-expression associated with PV interneurons. Thus, depolarizing actions of GABA responses in adult projection neurons can be explained by the expression and somatic localization of the NKCC1 transporters. A somato/dendritic distribution of KCC2 expression was observed only in striatal interneurons and corresponds to the hyperpolarizing action of GABA recorded in these cells. This correlates the different roles for GABA actions in striatal neuronal excitability with the expression of specific chloride transporters.
Filiaciones:
Tapia, Dagoberto:
Neuroscience Division, Cell Physiology Institute, Autonomous National University of Mexico, Mexico City, Mexico
Neuroscience Division, Cell Physiology Institute, Autonomous National University of Mexico, Mexico City, 04510, Mexico
Autonomous Natl Univ Mexico, Neurosci Div, Cell Physiol Inst, Mexico City, DF, Mexico
Suarez, Paola:
Neuroscience Division, Cell Physiology Institute, Autonomous National University of Mexico, Mexico City, 04510, Mexico
Autonomous Natl Univ Mexico, Neurosci Div, Cell Physiol Inst, Mexico City, DF, Mexico
Arias-Garcia, Mario A.:
Neuroscience Division, Cell Physiology Institute, Autonomous National University of Mexico, Mexico City, 04510, Mexico
Autonomous Natl Univ Mexico, Neurosci Div, Cell Physiol Inst, Mexico City, DF, Mexico
Garcia-Vilchis, Brisa:
Neuroscience Division, Cell Physiology Institute, Autonomous National University of Mexico, Mexico City, 04510, Mexico
Autonomous Natl Univ Mexico, Neurosci Div, Cell Physiol Inst, Mexico City, DF, Mexico
Serrano-Reyes, Miguel:
Neuroscience Division, Cell Physiology Institute, Autonomous National University of Mexico, Mexico City, 04510, Mexico
Autonomous Natl Univ Mexico, Neurosci Div, Cell Physiol Inst, Mexico City, DF, Mexico
Bargas, Jose:
Neuroscience Division, Cell Physiology Institute, Autonomous National University of Mexico, Mexico City, 04510, Mexico
Autonomous Natl Univ Mexico, Neurosci Div, Cell Physiol Inst, Mexico City, DF, Mexico
Galarraga, Elvira:
Neuroscience Division, Cell Physiology Institute, Autonomous National University of Mexico, Mexico City, 04510, Mexico
Autonomous Natl Univ Mexico, Neurosci Div, Cell Physiol Inst, Mexico City, DF, Mexico
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