ADRB3 and breast cancer: BC patients showed increased MFI of ADRB3 expression in lymphocytes and myeloid cells compared to healthy controls (10.5 ± 1.6 vs. 3.3 ± 0.5; P < 0.01; 17.5 ± 2.8 vs. 6.3 ± 0.9; P < 0.05, respectively) (Fig. 2K).