Effects of Aprotinin on Serum Interleukin-2 and Soluble Interleukin-2 Receptor during Cardiopulmonary Bypass

Cardiopulmonary bypass (CPB) impairs immunedefense function. It has been documented by a lot ofresearch that interleukin--2 and its receptor are of importance in regulating immunity responses. We observed the changes of interleukin--2 (IL--2) and soluble interleukin--2 receptor (IL--ZR) during heart valve(s) replacement operation and effects of aprotinin onthem.1 MATERIALS AND METHODSTwenty patients undergoing heart valve (s) replacement were randomly divided into two groups:control…

Effects of aprotinin on serum interleukin-2 and soluble interleukin-2 receptor during cardiopulmonary bypass

Interleukin-2 and its receptor are of importance in regulating immunity responses. The changes of interleukin-2 (IL-2) and soluble interleukin-2 receptor (IL-2R) during heart valve (s) replacement operation and effects of aprotinin on them were observed. Twenty patients undergoing heart valve (s) replacement were randomly divided into two groups: control group (n=10) and apro- tinin group (n=10). In aprotinin group, 1 000 000 KIU aprotinin was given by vein injection and then 2 000 000 KIU was given as a bolus in prime. Blood samples were collected before CPB, right after CPB and on the 1st, 3rd and 7th postoperative day (POD) for serum IL-2 and sIL-2R determination. Results showed that after CPB, IL-2 was reduced and slL-2R increased. Meanwhile, serum IL-2R was lower in aprotinin group than that of control. It is concluded that the immunity depression after CPB is associated with low level of IL-2 and high level of sIL-2R and aprotinin can ameliorate the situation.