Na+/Ca2+exchanger 1, CNC, DKFZp779F0871, MGC119581 , FLJ37694, FLJ43417, Na+/Ca2+ exchange protein 1, Na+/Ca2+ exchanger, NCX 1, NCX, SLC8A1, SLC8A1 protein , Sodium Calcium Exchanger, Sodium/calcium exchanger 1, Solute carrier family 8 member 1.
In cardiac myocytes, Ca(2+) concentrations alternate between high levels during contraction and low levels during relaxation. The increase in Ca(2+) concentration during contraction is primarily due to release of Ca(2+) from intracellular stores. However, some Ca(2+) also enters the cell through the sarcolemma(plasma membrane). During relaxation, Ca(2+) is sequestered within the intracellular stores. To prevent overloading of intracellular stores, the Ca(2+) that entered across the sarcolemma must be extruded from the cell. The Na(+)-Ca(2+) exchanger is the primary mechanism by which the Ca(2+) is extruded from the cell during relaxation. In the heart, the exchanger may play a key role in digitalis action. The exchanger is the dominant mechanism in returning the cardiac myocyte to its resting state following excitation.[supplied by OMIM].
