摘要目的 探讨DNA倍体、S期比值(SPF)、增殖指数(PI)在结直肠癌演变过程中的变化及临床意义.方法 应用流式细胞仪检测10例正常结直肠黏膜(正常黏膜组)、12例癌前病变(癌前病变组)、40例结直肠癌(结直肠癌组)及40例癌旁组织(癌旁组织组)DNA倍体、SPF、PI,并进行比较.结果 结直肠癌组DNA二倍体7例,DNA异倍体33例,癌旁组织组分别为35、5例,癌前病变组分别为10、2例,正常黏膜组分别为10、0例,结直肠癌组的DNA倍体分析结果与正常黏膜组、癌前病变组、癌旁组织组比较差异均有统计学意义(P＜0.01).结直肠癌组SPF为35.36±7.45,PI为42.92±6.81,癌旁组织组分别为20.82±5.51、31.34±4.88,癌前病变组分别为21.13±5.07、31.70±5.59,正常黏膜组分别为19.93±3.73、32.01±4.99,结直肠癌组SPF及PI较癌前病变组、癌旁组织组及正常黏膜组明显升高,差异均有统计学意义(P＜0.01).结直肠癌组中,DNA倍体类型与肿瘤的Dukes分期(P=0.027)及分化程度(P=0.030)有相关性.结论 检测DNA倍体、SPF、PI可为结直肠癌的生物学特性的判断、评估预后及制定合理的治疗方案提供依据.

abstractsObjective To study the changes and clinical significance of DNA ploidy,S-phase fraction(SPF),proliferating index(PI) in colorectal carcinoma.Methods In 40 cases of colorectal carcinoma (colorectal carcinoma group ),40 cases corresponding cancer-adjacent tissue (cancer-adjacent tissue group ),12 cases of precancerous lesions (precancerous lesions group) and 10 cases of normal colorectal mucosa coli (normal colorectal mucosa coli group),DNA ploidy,SPF and PI were detected with flow cytometry and compared.Results DNA diploid was 7 cases,DNA heteroploid was 33 cases in colorectal carcinoma group,35,5 cases in cancer-adjacent tissue group,10,2 cases in precancerous lesions group,10,0 case in normal colorectal mucosa coli group,there were significant differences among them(P＜ 0.01 ).SPF and PI in colorectal carcinoma group (35.36 ± 7.45,42.92 ± 6.81 ) were significantly higher than those in cancer-adjacent tissue group (20.82 ±5.51,31.34 ±4.88),precancerous lesions group (21.13 ± 5.07,31.70 ±5.59) and normal colorectal mucosa coli group ( 19.93 ± 3.73,32.01 ± 4.99),there were significant differences among them(P＜ 0.01 ).DNA ploidy was significantly correlated with Dukes staging (P=0.027) and the differentiation of colorectal carcinoma (P =0.030).Conclusions DNA ploidy,SPF,PI may get some molecular biologycharacteristic and proliferation activity of colorectal carcinoma at molecule level,which may be helpful for treatment and evaluation of prognosis of colorectal carcinoma.