Recent research has shown that the interaction of sphingosine-1-phosphate with its receptors (S1PR1–S1PR5) has an essential role in regulating immune responses, not only through the control of immune-cell trafficking but also through effects on immune-cell function. Understanding these effects holds promise for the use of S1PR ligands as immunomodulatory therapeutics.
- Juan Rivera
- Richard L. Proia
- Ana Olivera