摘要
AIM： To evaluate the frequency of the loss of the Adenomatous Polyposis Coil （APC） protein and to compare the APC status with the characteristics of colorectal adenomas. METHODS： Immunohistochemical analysis of the APC protein was performed on 118 adenomas and the results were compared with parameters of malignant potential, location of adenomas, macroscopic appearance and age of the patients. RESULTS： A complete loss of the APC protein was found in 28 （24%） adenomas, while 90 （76%） were APC positive. The mean size of adenomas was 13.5± 14.2 mm （95% CI 10.5-16.5） in APC-positive, and 13.8 ±15.5 mm （95% CI 7.8-19.8） in APC-negative adenomas （P = 0.364）. Statistical analysis revealed no difference between APC-positive and negative adenomas as to the histological type （P = 0.327） and grade of dysplasia （P =0.494）. We found that even advanced adenomas did not differ in their APC status from the non-advanced tumors （P = 0.414）. Finally, no difference was found when the location （P = 0.157）, macroscopic appearance （P = 0.571） and age of patients （P = 0.438） were analysed and compared between both APC positive and negative adenomas. CONCLUSION： Most adenomas expressed full-length APC protein, suggesting that protein expression is not a reliable marker for assessment of APC gene mutation. Complete loss of APC protein did not influence morphology, location, or appearance of adenomas, nor was it affected by the patient＇s age.
瞄准：评估腺瘤结肠息肉病(APC ) 蛋白质的损失的频率并且把 APC 地位与颜色的特征作比较表面的腺瘤。方法：APC 蛋白质的 Immunohistochemical 分析在 118 个腺瘤上被执行，结果与病人的恶意的潜力，腺瘤的地点，宏观的外观和年龄的参数相比。结果：APC 蛋白质的完全的损失在 28 被发现的 A (24%) 腺瘤，当(76%) 90 是 APC 时积极。腺瘤的吝啬的尺寸是 13.5 +/- 14.2 公里(95% CI 10.5-16.5 ) 在 APC 积极，并且 13.8 +/- 在 APC 否定的腺瘤的 15.5 公里(95% CI 7.8-19.8 )(P = 0.364 ) 。统计分析没至于组织学的类型揭示 APC 积极、否定的腺瘤之间的差别(P = 0.327 ) 并且发育异常的等级(P = 0.494 ) 。我们发现甚至先进的腺瘤没与非先进的肿瘤在他们的 APC 地位不同(P = 0.414 ) 。最后，当时，没有差别被发现地点(P = 0.157 ) ，宏观的外观(P = 0.571 ) 并且病人的年龄(P = 0.438 ) 在两个 APC 积极、否定的腺瘤之间被分析并且比较。结论：大多数腺瘤表示了全身的 APC 蛋白质，建议那蛋白质表情不是为对 APC 基因变化的评价的一个可靠标记。APC 蛋白质的完全的损失没影响腺瘤的形态学，地点，或外观，它也不受病人的年龄影响。
基金
Supported by the research project MSM 0021620808
