Prof. Dr. Gabriela Riemekasten hosted the 5th International Symposium on Regulatory Autoantibodies in Lübeck. Many guests, including international guests, accepted the invitation to the Hanseatic city. Once again this year, numerous interesting presentations were given on the topic of GPCRs and their causal relationship in patients was discussed. The methods for eliminating pathogenic autoantibodies and their effects on specific clinical pictures were presented with impressive images. CellTrend and the founded association for biomedical research Duska Dragun e.V. were among the proud sponsors of this symposium.