The loss−of−function of the FPR1 allele has been associated with unfavorable survival in patients with breast carcinoma or colorectal cancer after adjuvant chemotherapy, as well as blocking the receptor function with cyclosporin H (CsH) was shown to reduce the efficacy of anti-cancer chemotherapy against carcinogen-induced breast cancer (209, 210). Here, FPR1 is linked to breast carcinoma.