摘要
目的:研究氟尿嘧啶代谢相关酶在原发性结直肠癌的表达及临床意义。方法:收集北京大学临床肿瘤学院2003年8月至2004年2月收治的经病理确诊的61例原发性结直肠癌患者的标本,应用RT PCR方法检测原发性结直肠癌组织和非肿瘤组织中胸苷酸合成酶(thymidylatesynthase, TS)、二氢胸腺嘧啶脱氢酶(dihydropyrimidinedehydrogenase, DPD)、乳清酸磷酸核糖基转移酶(orotatephosphoribosyltransferase, OPRT)的基因表达。结果:每种酶在肿瘤组织和非肿瘤组织中的基因表达水平存在正相关。肿瘤组织与非肿瘤组织相比,TS和DPD表达近似。结直肠癌肿瘤组织中OPRT表达水平是非肿瘤组织中OPRT表达水平的4. 38倍(P=0. 000),OPRT的表达量在黏液腺癌中是最低的,在低分化腺癌中是最高的。肿瘤组织/非肿瘤组织OPRT表达量的比值(TOPRT/NOPRT)与淋巴结转移(r=0. 36;P=0. 005)、脉管转移(r=0. 26;P=0. 041)和组织学分化(r=-0. 33;P=0. 009)具有相关性。结论:采用RT-PCR法检测三种酶在结直肠癌中的表达切实可行,有良好的临床应用前景。提示OPRT可能是潜在的结直肠癌预后指标。
Objective:To investigate the expression of metabolic enzymes of fluoropyrimidines in primary colorectal cancer. Methods: Sixty-one cases of pathological confirmed primary colorectal cancer were collected in Beijing Cancer Hospital from August 2003 to February 2004. The expressions of thymidylate synthase (TS), dihydropyrimidine dehydrogenase (DPD) and orotate phosphoribosyl transferase (OPRT) were detected in paired tumor tissues and non-cancerous tissues by RT-PCR. Results: Expression of each enzyme in tumor tissues was positively correlated with that in paired non-cancerous tissues respectively. Compared with the expression of each enzyme in cancer with that in non-cancer, OPRT was higher in cancer while that of DPD and TS was comparable. The expression of OPRT was approximately 4.38-folds higher in colorectal cancer tissues than that in non-cancerous tissues (P0.000). The lowest expression of OPRT was found in mucinous carcinoma while the highest levels in poorly-differentiated adenocarcinoma. There were correlations between the ratio of tumor tissues / non-cancerous tissues OPRT expression (T/N) and metastasis to the lymph nodes (r0.36; P0.005), small vessel invasion (r0.26; P0.041) and differentiation (r-0.33; P0.009). Conclusion: The detection of three enzymes by means of RT-PCR is practical and can be used in clinical application. Our results also suggest that OPRT is a potential biomarker in predicating prognosis of colorectal cancer.
出处
《北京大学学报（医学版）》
CAS
CSCD
北大核心
2005年第3期269-272,共4页
Journal of Peking University:Health Sciences
基金
北京大学肿瘤学院基金项目(00 01
04 22)资助~~
