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Ann Thorac Surg 2001;71:801-806
© 2001 The Society of Thoracic Surgeons

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Original article: cardiovascular

Proinflammatory cytokines in cerebrospinal fluid in repair of thoracoabdominal aorta

^a Department of Cardiovascular Surgery, Hokkaido University School of Medicine, Sapporo, Japan
^b Department of Clinical Laboratory Medicine, Hokkaido University School of Medicine, Sapporo, Japan

Accepted for publication September 14, 2000.

Address reprint requests to Dr Kunihara, Department of Cardiovascular Surgery, Hokkaido University School of Medicine, N14, W5, Kita-ku, Sapporo, Japan 0608648
e-mail: kunihara{at}med.hokudai.ac.jp

Background. Little is known about alterations of cytokine levels in cerebrospinal fluid (CSF) during thoracoabdominal aortic surgery. We measured perioperative CSF cytokine levels to determine their clinical significances.

Methods. Perioperative serum and CSF levels of cytokine were measured in 15 adult patients undergoing repair of the descending thoracic aorta (n = 4) or thoracoabdominal aorta (n = 11). All patients underwent prosthetic replacement and perioperative CSF drainage. Serum and CSF levels of tumor necrosis factor-, Interleukin- (IL-) 1ß, IL-6, IL-8, IL-10, and IL-12 were measured before operation and at 0, 6, 12, 18, 24, 48, and 72 hours postoperatively using enzyme-linked immunosorbent assays.

Results. There were no hospital deaths, but 1 patient suffered paraplegia. Cerebrospinal fluid IL-8 levels peaked at immediately after operation (751.7 ± 42.1 pg/mL versus preoperative levels, 54.9 ± 24.6 pg/mL; p < 0.001), and the higher levels persisted for 72 hours. In contrast, serum IL-8 levels did not change and remained lower than CSF levels. The patient with paraplegia had the highest CSF IL-8 levels throughout the study period. Serum and CSF levels of tumor necrosis factor-, IL-1ß, IL-6, and IL-12 did not significantly change. Serum and CSF levels of IL-10 were significantly elevated after operation compared with preoperative levels. In contrast to IL-8, serum IL-10 levels surpassed CSF levels.

Conclusions. Cerebrospinal fluid IL-8 levels are significantly elevated in thoracoabdominal aortic operation, and may be the most sensitive to the inflammatory response in the ischemic spinal cord injury. Persistent elevation of CSF IL-8 levels may be predictive of further development of neurologic deficits, and a reduction of proinflammatory cytokine levels may be a beneficial effect of CSF drainage, but this requires further investigation.

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