In the article titled “Sphingosine-1-Phosphate Signaling in Immune Cells and Inflammation: Roles and Therapeutic Potential” [1], there was an error in the “FTY720 and Lymphopenia” section, where the sentence “p-FTY720 causes continued cAMP signaling that is not dependent on S1P1R redistribution and induces functional antagonism of Ca2+ signaling after transient stimulation” should be corrected to “p-FTY720 causes continued cAMP signaling that is not dependent on S1PR1 redistribution and induces functional antagonism of Ca2+ signaling after transient stimulation.”