Inside of a recent review, we reported the identification plus the characterization of a different atypical opioid receptor with special adverse regulatory properties to opioid peptides.1 Our effects showed that ACKR3/CXCR7, hitherto called an atypical scavenger receptor for chemokines CXCL12 and CXCL11, can be a broad-spectrum scavenger for opioid