삼출성 흉수에서 악성 감별을 위한 MAGE 유전자 검출의 의의

Diagnostic Utility of MAGE Expression in Exudative Pleural Effusion

  • 김경찬 (계명대학교 의과대학 내과학교실) ;
  • 서창균 (계명대학교 의과대학 내과학교실) ;
  • 박순효 (계명대학교 의과대학 내과학교실) ;
  • 최원일 (계명대학교 의과대학 내과학교실) ;
  • 한승범 (계명대학교 의과대학 내과학교실) ;
  • 전영준 (계명대학교 의과대학 내과학교실) ;
  • 박종욱 (계명대학교 의과대학 면역학교실) ;
  • 전창호 (대구카톨릭대학교 의과대학 임상병리과교실)
  • Kim, Kyung Chan (Department of Internal Medicine, Keimyung University School of Medicine) ;
  • Seo, Chang Gyun (Department of Internal Medicine, Keimyung University School of Medicine) ;
  • Park, Sun Hyo (Department of Internal Medicine, Keimyung University School of Medicine) ;
  • Choi, Won-Il (Department of Internal Medicine, Keimyung University School of Medicine) ;
  • Han, Seung Beom (Department of Internal Medicine, Keimyung University School of Medicine) ;
  • Jeon, Young June (Department of Internal Medicine, Keimyung University School of Medicine) ;
  • Park, Jong-Wook (Department of Immunology, Keimyung University School of Medicine) ;
  • Jeon, Chang-Ho (Department of Laboratory Medicine, School of Medicine, Catholic University of Daegu)
  • 발행 : 2004.02.28

초록

연구배경 : 최근 암에서 발현되는 다양한 종양특이항원들이 밝혀지고 있다. MAGE는 대부분의 암에서 발현되므로 이러한 종양 특이성을 이용하여 암을 진단하려는 연구가 시도되고 있다. 그러나 흉수를 대상으로 MAGE 발현을 검사한 연구는 아직 없었다. 이번 연구는 삼출성 흉수에서 MAGE 유전자의 발현여부를 검사하여 양성과 악성의 감별진단에 도움이 되는지를 알아보고 이를 기존의 세포검사 결과와 비교해 보기 위하여 시행하였다. 방 법 : 2002년 1월 1일부터 동년 6월 30일까지 삼출성 흉수임이 확인된 44명을 대상으로 하였다. 10 mL의 흉수를 채취하여 각각 5 mL씩 세포검사와 MAGE 검사를 시행하였다. MAGE 발현 유무는 RT-PCR 방법을 이용한 commercial kit를 이용하여 판정하였다. 등록된 환자들은 악성과 양성군으로 분류하여 각각 민감도와 특이도를 비교 분석하였다. 결 과 : 연령, 성별, 흉수 내 백혈구 수치, 흉수/혈청 protein 비 및 흉수/혈청 LDH 비 등은 악성과 양성군 간에 유의한 차이가 없었다. MAGE 검사의 민감도는 72.2%, 특이도 96.2%, 양성 예측값 92.9% 그리고 음성 예측값은 83.3%이었으며 세포검사의 민감도는 66.7%, 음성 예측값 81.3%이었다. MAGE 검사와 세포검사의 민감도는 통계적으로 유의한 차이는 없었으며 특이도의 경우 결핵성 흉막염 1례에서 MAGE가 위양성이 나왔다. 결 론 : MAGE 검사는 삼출성 흉수를 가진 환자에서 양성과 악성의 감별진단에 예민하고 특이적인 지표로 평가된다. 또한 악성 흉수를 가진 환자에서 5mL의 흉수를 검사할 경우 MAGE 검사는 세포검사와 동등한 수준의 민감도를 가지는 것으로 판단된다.

Background : In recent years, numerous human tumor specific antigens such as melanoma antigen gene(MAGE) that is recognized by autologous cytotoxic T lymphocytes have been identified. MAGE is expressed in many human malignancies in various organs, such as lung, breast, stomach, esophagus and leukemia. Therefore MAGE has been studied widely for tumor diagnosis and immunotherapy. But, so far there were no clinical studies evaluating the role of MAGE in pleural effusion. We investigated the expression of MAGE in the patients with exudative pleural effusion for it's diagnostic utility and the results were compared with those of cytologic examinations. Methods : Diagnostic thoracentesis was performed in 44 consecutive patients with exudative pleural effusion during 6 months. We examined the expression of MAGE and cytology with the obtained pleural effusion. Expression of MAGE was interpreted by means of a commercial kit using RT-PCR method. Enrolled patients were divided into two groups such as malignant and benign and we analyzed its' sensitivity and specificity. Results : There were no significant differences between two groups in age, sex, white blood cell counts in pleural fluid, pleural fluid/serum protein ratio and pleural fluid/serum LDH ratio. The sensitivity and specificity of MAGE were 72.2% and 96.2% respectively and the positive predictive value and negative predictive value of MAGE were also 92.9% and 83.3% respectively. The sensitivity and negative predictive value of cytologic examinations were 66.7% and 81.3% respectively. There were no significant differences between sensitivities of MAGE and cytologic examinations but false positive result of MAGE was found in 1 case of tuberculous pleurisy. Conclusion : MAGE is a sensitive and specific marker for the differential diagnosis between benign and malignant effusion in patients with exudative pleural effusion. And MAGE would provide the equal sensitivity compared with that of cytologic examination in patients with malignant pleural effusion if 5mL of the pleural fluid is examined.

키워드

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