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Immunohistochemical Study of COX-2, VEGF, CD34 and MMP-9 Expression in Colonic Adenocarcinoma

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(1)대한외과학회지:제 68 권 제4호 Vol. 68, No. 4, Aril, 2005. □ 원. 저 □. 대장선암종에서 COX-2, VEGF, CD34 및 MMP-9 발현에 대한 면역조직화학 연구 중앙대학교 의과대학 외과학교실, 1병리학교실 1. 1. 박 용 검․이 인 성 ․유 재 형. to tumor progression and metastasis of colonic adenocarcinoma. (J Korean Surg Soc 2005;68:319-326). Immunohistochemical Study of COX-2, VEGF, CD34 and MMP-9 Expression in Colonic Adenocarcinoma. Key Words: COX-2, VEGF, CD34, MMP-9, Adenocarcinoma, Colon 중심 단어: COX-2, VEGF, CD34, MMP-9, 선암종, 대장. Yong Keum Park, M.D., In Sung Lee, M.D.1 and Jae Hyung Yoo, M.D.1. ꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏ. Departments of Surgery, 1Pathology, College of Medicine, Chung-Ang University, Seoul, Korea. Purpose: The aim of this study was to analyse expression of COX-2, VEGF, CD34 and MMP-9 in colonic adenocarcinoma, and correlate this expression with clinicopathologic parameters. Methods: Tumor sections of 66 consecutive patients undergoing potentially curative surgery for an adenocarcinoma of the colon were immunohistochemically stained using antihuman-COX-2, VEGF, CD34 and MMP-9 antibodies. For the evaluation of COX-2, VEGF and MMP-2 expression, those cases showing the respective antigen expression in more than 10% of the tumor cells were considered to be positive. Microvessel density (MVD) by CD34 expression was evaluated as the number of vessels per high-power field(X200). The mean value for the three fields were recorded as the MVD for each tumor. Results: Although COX-2 expression was not correlated with any clinicopathologic factors, it showed the increased expression according to T-stage, lymph node metastasis and clinical staging. Microvessel density with CD34 expression was correlated with lymph node metastasis and clinical staging. MMP-9 expression was correlated with clinical stage. Microvessel density was correlated with COX-2, VEGF and MMP-9 expression. Conclusion: This results indicate that angiogenesis is a complex process that involves multiple factors including COX-2, VEGF, CD34 & MMP-9, and suggest that microvessel density with COX-2 and MMP-9 expression are related. 서. 론. Cyclooxygenase (COX)는 arachidonic acid를 기질로 하여 신속한 자동비활성화과정을 통하여 prostaglandin (PG)을 합 성하는경로에서 첫 번째로 중요한 속도조절효소로, COX를 생산하는 유전자에는 COX-1과 COX-2의 두 가지 형태가 있 다. COX-1은 위, 콩팥, 혈소판, 혈관내피세포 등에 존재하 며, 이러한 장기의 분화과정이나, 위점막의 완전함, 혈소판 의 응집 및 신장기능의 항상성을 유지하기 위해 자연적으 로 발현되는 기본유전자이며,(1) COX-2는 사이토카인,(2) 암유발촉진자,(3) 성장인자 등(4)의 자극에 의해 발현되는 유전자로 염증이나 암조직에 존재하는 종양세포, 염증세포 및 혈관내피세포 등에서 생성되는 PG의 양을 조절하는 역 할을 한다. VEGF (vascular endothelial growth factor)는 분자 량이 32∼42 Kd의 당단백질로 조직허혈에 의해 유도되는 성장인자로 혈관내피세포에 특이성을 나타내어 내피세포 의 증식과 화학주성을 초래하며, 부수적으로 단백분해효소 와 matrix metalloproteinase (MMP) 등이 분비되어 기저막의 파괴와 간질의 융해가 일어나고 궁극적으로 모세혈관의 발 아와 더불어 관상구조로 팽창되어 신생혈관의 기능을 하게 된다.(5) 신생혈관형성은 암조직에 영양분과 산소의 공급을 위한 필수적인 현상이며, 종양세포나 종양조직 내에 침투한 염 증세포에서 분비되는 여러 가지 단백질과 효소의 복합적인 경로에 의해 조절될 것이라는 가능성이 제시된 후,(6) arachidonic acid로부터 PG 합성에 관여하는 촉매제인 COX-2 가 vascular endothelial growth factor (VEGF), platelet-derived. 책임저자:박용검, 서울시 용산구 한강로 3가 65 ꂕ 140-757, 중대부속 용산병원 외과 Tel: 02-748-9871, Fax: 02-793-1042 E-mail: [email protected] 접수일:2004년 11월 26일, 게재승인일:2005년 2월 1일. 319.

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