摘要
目的观察直肠癌组织及其远端黏膜组织中P53蛋白表达及微血管分布,并从分子病理学水平探讨直肠癌的安全远侧切缘。方法对45例中低位直肠癌下缘进行标记,PET/CT检查并结合半定量免疫组织化学方法检测直肠癌及其远端黏膜组织中P53和CD34蛋白的表达。结果直肠癌及其远端黏膜组织中均可见P53蛋白表达及微血管分布,直肠癌组织中P53蛋白表达及微血管密度(MVD)明显高于直肠癌远端黏膜组织(P<0.01)。直肠癌远端黏膜组织中P53蛋白表达及MVD随着距离增大而减少,但有统计学意义的改变只在直肠癌远端1.5cm内。正常直肠组织中仍有P53蛋白表达和微血管分布。除直肠癌组织及其远端0.5cm段黏膜组织中MVD与肿瘤直径有关(P<0.05)外,直肠癌及其远端黏膜组织中P53蛋白表达及MVD分布与肿瘤直径、分期以及分化程度均无关。结论从分子病理学角度说明2cm的直肠癌远端长度是安全的远侧切缘。
Objective To observe the expressions of P53 and CD34 in rectal cancer and distal mucosa and to explore the safe distal margin of radical surgery for rectal cancer at molecular pathologic level. Methods Forty-five cases of rectal cancer were marked before operation, and then the cases were detected by PET/CT. P53 and CD34 expressions in rectal tissues were detected by immunohistochemistry technique. Results P53 expression and microvessel density （MVD） in rectal cancer were significantly higher than those in distal mucosa, which in distal mucosa were decreased along the anal direction. P53 and CD34 were still found in the normal rectal tissue. P53 expression and MVD were not significantly different between in more than 1.5 cm distal rectal mucosa and in normal rectal tissue. Besides MVD was related to size of tumor in rectal cancer and distal 0.5 cm rectal mueosa tissue, P53 and CD34 in rectal cancer and distal mucosa rectal tissue were not associated with tumor diameter, stage and differentiation of rectal cancer. Conclusion From the molecular pathologic view, the resection of 2.0 cm rectal distal tissue should be safe for excision of rectal cancer.
出处
《中国普外基础与临床杂志》
CAS
2008年第9期641-645,共5页
Chinese Journal of Bases and Clinics In General Surgery
基金
福建省自然科学基金计划资助项目(编号:C0410044)~~
