SGK1 (Serum/Glucocorticoid Regulated Kinase 1): SGK1 is a serine/threonine kinase regulated by glucocorticoids, playing roles in cell survival, ion transport, and metabolic regulation. It assists the body in responding to stress and controls ion channel activity, especially in the kidneys, affecting sodium and water balance. Dysregulation of SGK1 has been associated with hypertension, diabetic nephropathy, and certain cancers.