@mariovitali , you might like this study.
https://www.ncbi.nlm.nih.gov/pmc/ar...wl41GfHPP_KFKJWpLQiHXTZFY4tCNCKTygLRT7f2iLljc
Of great interest in neurotrauma and neurodegenerative disorders are the α-amino-3-hydroxy-5-methyl-4-isoxazoleproprionic acid (AMPA)-type glutamate receptors, which are composed of a number of subunits. Normally, AMPA receptors contain a GluR2 subunit, which makes them impermeable to calcium.[
9] Under certain physiological conditions and a growing number of pathological conditions, the endoplasmic reticulum rapidly manufactures special GluR2-lacking AMPA receptors that are calcium permeable, as is the case with N-methyl-D-aspartate (NMDA) receptors.[
163] These are transported to the synaptic membrane and inserted in the active receptor site, rendering the synapse significantly more sensitive to excitatory activation. In certain circumstances, these special AMPA receptors can lead to progressive neurodegeneration over long periods of time.