Another previous report demonstrated that FPR signalling initiated by Cpd43, a dual agonist for FPR1 and FPR2, makes CD4 T cells more apoptotic and inhibits the proliferation of fibroblast‐like synoviocytes, then attenuating the CIA mouse RA model via FPR2.36 Here, FPR1 is linked to rheumatoid arthritis.