Diagnostic Utility of Pleural Fluid Soluble Triggering Receptor Expressed on Myeloid Cells 1 Protein in Patients with Exudative Pleural Effusion

삼출성흉수에서 Soluble Triggering Receptor Expressed on Myeloid Cells 1 Proteion의 진단적 유용성

  • Sim, Yun Su (Department of Internal Medicine, Ewha Womans University College of Medicine) ;
  • Lee, Jin Hwa (Department of Internal Medicine, Ewha Womans University College of Medicine) ;
  • Cheun, En Mi (Department of Internal Medicine, Ewha Womans University College of Medicine) ;
  • Chang, Jung Hyun (Department of Internal Medicine, Ewha Womans University College of Medicine)
  • 심윤수 (이화여자대학교 의과대학 내과학교실) ;
  • 이진화 (이화여자대학교 의과대학 내과학교실) ;
  • 천은미 (이화여자대학교 의과대학 내과학교실) ;
  • 장중현 (이화여자대학교 의과대학 내과학교실)
  • Received : 2007.03.26
  • Accepted : 2007.05.28
  • Published : 2007.06.30

Abstract

Background: Triggering receptor expressed on myeloid cells 1 protein (TREM-1) is a cell surface molecule expressed on neutrophils and monocytes, and it plays an important role in myeloid cell-activated inflammatory response. The aim of this study was to investigate the diagnostic efficiency of soluble (s) TREM-1 in the patients who had pleural effusion from various causes. Methods: Forty-five patients with exudative pleural effusion were included in this study. The level of sTREM-1 was measured in both the serum and pleural fluids by immunoblot assay with using human-sTREM-1 antibody. Results: The pleural fluid sTREM-1 was significantly different in the three groups of exudative pleural effusion (p=0.011). Particularly, the patients with parapneumonic effusion were found to have significantly higher pleural fluid levels of sTREM-1 than patients with tuberculous (p<0.05) and malignant effusion, respectively (p<0.05). However, the serum sTREM-1 did not show a significant difference in the three groups. In order to evaluate the diagnostic utility of pleural fluid sTREM-1, the receiver operating characteristic (ROC) curve was constructed and the area under the curve (AUC) was 0.818 (p=0.001). Using a cutoff value of 103.5 pg/mL for the pleural fluid sTREM-1, the sensitivity and specificity were 73% and 81%, respectively, for differentiating parapneumonic effusion from tuberculous or malignant effusions. Conclusion: Pleural fluid sTREM-1 can be an additional marker for making the differential diagnosis of pleural effusion.

배 경: TREM-1은 중성구, 단핵구, 대식세포 표면에 존재하는 세포표면수용체로, 세균에 의해 그 발현이 증가하여 여러 염증전달물질을 증폭시키는 역할을 한다. 저자들은 삼출성흉수를 가진 환자의 혈청과 흉수에서 soluble (s) TREM-1을 측정하여 흉수의 원인진단에 대한 유용성을 알아보고자 하였다. 방 법: 2003년 3월부터 2006년 12월까지 삼출성흉수로 입원한 환자 45명을 대상으로 하여, 혈청과 흉수에서 human sTREM-1 항체를 사용하여 면역점적법(immunoblot assay)으로 sTREM-1을 측정하였다. 원인질환에 따라 결핵성, 부폐렴성, 악성흉수로 나누어 비교하였다. 결 과: 혈청 sTREM-1은 원인질환 별로 유의한 차이를 보이지 않았으나, 흉수 sTREM-1은 원인질환별로 유의한 차이를 보였으며(p=0.011), 특히 부폐렴성흉수의 sTREM-1이 결핵성흉수와(p<0.05) 악성흉수보다 유의하게 높았다(p<0.05). 부폐렴성흉수를 진단하는 데 흉수 sTREM-1의 유용성을 평가하고자 ROC 곡선을 그린 결과 곡선밑면적은 0.818이고 (p=0.001), 흉수 sTREM-1의 cutoff 값을 103.5pg/mL로 하였을 때 민감도가 73%, 특이도가 81%이었다. 결 론: 흉수의 sTREM-1은 삼출성흉수 중 부폐렴성흉수를 진단하는 유용한 지표로 판단된다.

Keywords

References

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