INS and Sepsis: Although release of tyrosine was affected slightly in the low-dose insulin group in sepsis rats (383.4 ± 12.72 vs. 361.3 ± 16.05, P = 0.26), when the infusion rate of insulin was increased to 4.8 mU.kg-1.min-1, the net release of tyrosine was significantly decreased compared to the LPS and low-dose insulin groups (298.21 ± 11.18 vs. 383.4 ± 12.72, P < 0.01; 298.21 ± 11.18 vs. 361.3 ± 16.05, P < 0.01).