S-100ao protein in blood and urine during open-heart surgery.
Concentrations of S100a0 protein and CK-MB were measured by enzyme immunoassay in serial samples of arterial and coronary-sinus blood and urine taken from 26 patients who were undergoing mitral valve surgery. The mean concentration of arterial S100a0 in plasma was 0.32 (SD 0.28) ng/mL at the beginning of anesthesia, increased sharply after reperfusion, peaking [14.4 (SD 6.63) ng/mL] after 45 min of reperfusion, then decreased rapidly. The concentration of creatine kinase (CK) isoenzyme MB in arterial blood plasma was greatest 3 h after reperfusion [107 (SD 54.5) ng/mL]. S100a0 concentrations in urine increased dramatically after reperfusion [16,300 (SD 12,000) ng/h vs 44 (SD 32) ng/h], while CK-MB increased slightly [135 (SD 75) ng/h vs 19 (SD 12) ng/h]. These results suggest that S100a0 in cardiac muscle is released into the bloodstream during open-heart surgery and is discharged into the urine more rapidly than is CK-MB. Determination of S100a0 in plasma or urine thus may be useful for estimating damage to heart muscle during open-heart surgery.
Department of Thoracic Surgery, Nagoya University School of Medicine, Japan.
A
A
Usui
K
K
Kato
T
T
Abe
M
M
Murase
M
M
Tanaka
E
E
Takeuchi
D015415:Biomarkers; D006348:Cardiac Surgical Procedures; D003402:Creatine Kinase / Q000032:analysis; D006331:Heart Diseases / Q000201:enzymology* / Q000601:surgery; D006801:Humans; D007432:Intraoperative Period; D007527:Isoenzymes; D009418:S100 Proteins / Q000032:analysis*
D015415:Biomarkers; D007527:Isoenzymes; C030564:S-100 calcium-binding protein alpha subunit; D009418:S100 Proteins; D003402:Creatine Kinase