Anoxia-Induced NF-kB-Dependent Upregulation of NCX1 Contributes to Ca Refilling Into Endoplasmic Reticulum in Cortical Neurons

Background and Purpose—The 3 gene products of the Na /Ca exchanger (NCX), viz, NCX1, NCX2, and NCX3, may play a pivotal role in the pathophysiology of brain ischemia. The aim of this study was to investigate the transductional and posttranslational mechanisms involved in the expression of these isoforms during oxygen and glucose deprivation and their role in endoplasmic reticulum Ca refilling in cortical neurons. Methods—NCX1, NCX2, and NCX3 transcript and protein expression was evaluated in primary cortical neurons by reverse transcriptase–polymerase chain reaction and Western blot. NCX currents (INCX) and cytosolic Ca 2