小窝蛋白-1在肾透明细胞癌中的表达及其临床意义

目的 探讨小窝蛋白-1(cw-1)表迭在肾透明细胞癌(RCCC)的生物学行为关系及其临床意义.方法 采用免疫组化PV-9000法检测74例RCCC标本和14例正常肾组织中cav-1的表述情况,并分析其与肿瘤临床分期、病理组织学分级等参数间的关系.结果 cav-1在正常肾组织100%阳性表达;在KCCC中cav-1阳性表达率为39.2%(29/74).cav-1阳性表达率在不同的KCCC临床分期或不同组织学分级中的差异有显著性(P<0.01).结论 cav-1在低分级、低分期RCCC中呈缺失性表达,cav-1在高分级、高分期ECCC呈相对高表达.car-1的表达与RCCC的生物学行为有明显关系,可望作为反映RCCC发展变化有用的生物学标记.     

食管鳞癌组织中hMLH1基因微卫星变异检测

目的:探讨食管鳞癌及不典型增生组织中hMLH1基因微卫星变异。方法:采用PCR-变性聚丙烯酰胺凝胶电泳-银染技术,对40例食管鳞癌、40例正常及26例不典型增生组织中hMLH1基因所在区域的3个微卫星位点D3S1561、D3S1289及D3S1448进行检测,分析其微卫星不稳定(MSI)及杂合性缺失(LOH)状况。结果:在不典型增生组织中三个位点的MSI总阳性率为65.0%,高于在癌组织的30.0％(P<0.05);前者的LOH总阳性率为7.6％,与后者的7.5％比较差异无统计学意义(P>0.05)。癌组织的MSI及LOH与不典型增生组织的MSI及LOH的r分别为0.623和1(P均<0.05)。结论:错配修复缺陷参与了食管鳞癌的发生过程,且是早期分子事件;在食管鳞癌发生发展过程中,hMLH1基因的LOH并非一个常见和重要的事件。     

CD44+/CD24-细胞在乳腺癌组织及细胞系中的数量与分布

Objective To study the distribution and quantity of CD44VCD24- cells in breast cancer tissue and the cell lines,and as well as its correlation with the expression of various breast cancer markers and molecular subtyping of breast carcinoma.Methods The expression of CD44 / CD24,estrogen receptor,progesterone receptor,HER2,human estrogen-induced protein PS2,bcl-2 and nm23 in 60 cases of invasive ductal carcinoma of breast were studied by either single or double immunohistochemical staining.The co-expression of CD44 and CD24 in 3 breast cancer cell lines (MCF-7,MDA-MB-468,and MDA-MB- 231) was also examined.Results The quantity and distribution of CD44 + /CD24- cells varied greatly and no specific patterns were identified.The percentage of CD44 + /CD24- in breast cancer was 65%.The amount of CD44+/CD24- cells did not correlate with the age of patients,lymph node metastasis,tumor　 size,molecular subtypes and expression of various breast cancer markers in breast carcinoma.The proportion of CD44+/CD24- cells in MCF-7,MDA-MB-468,and MDA-MB-231 cell lines was < 1%,5% and > 80% ,respectively.Conclusions CD44+ /CD24- cells are demonstrated in certain breast cancer tissues and cell lines.However,there is no relationship obtained between the quantity or the distribution of these cells and the molecular subtyping or the clinicopathologic parameters in breast cancer.     

Bmi-1在宫颈癌组织中的表达及相关性研究

目的 检测不同宫颈病变中Bmi-1的表达,探讨其与宫颈癌各临床病理因素的关系及意义.方法 以宫颈癌、慢性宫颈炎组织为材料,采用免疫组化染色法检测Bmi-1蛋白表达水平,并用原位杂交法检测Bmi-1 mRNA表达水平.结果 免疫组化结果显示,Bmi-1蛋白在宫颈癌组织中的表达明显高于慢性宫颈炎组织(P<0.05).原位杂交结果显示,宫颈癌组织的Bmi-1 mRNA表达水平明显高于慢性宫颈炎组织(P<0.05).Bmi-1的表达与宫颈癌肿瘤分级、临床分期等密切相关(P<0.05),而与患者的年龄、病理分型等无关(P>0.05).结论 Bmi-1在宫颈癌组织的表达状态与其发生发展关系密切,可作为反映宫颈癌生物学行为的有效指标之一. Abstract： Objective To investigate the expression and its clinicopathologic significance of Bmi-1 in different cervical diseases. Methods Immunocytochemistry was used to examined Bmi-1 protein expression in cervical carcinoma and chronic cervicitis tissue. The mRNA expression of Bmi-1 was examined by in situ hybridzation. Results Immunocytochemistry demonstrated that the levels of Bmi-1 protein in cervical carcinoma samples were significantly higher than those in chronic cervicitis tissues(P<0.05).In situ hybridration results shows that the levels of Bmi-1 mRNA in cervical carcinoma samples were significantly higher than those in chronic cervicitis tissues(P<0.05).Expression of Bmi-1 was correlated with tumor grading and clinical stage(P<0.05). On the other hand, it was not correlated with age or pathological type(P>0.05). Conclusions Overexpression of Bmi-1 in cervical carcinoma enhances carcinogenesis and invasion. It's possible that Bmi-1 serves as a good prognostic factor to indicate biologic behavior of cervical carcinoma.     

浅谈乳腺癌抗血管化治疗中低分子肝素的作用

在乳腺癌的发生、发展过程中,微血管生成起着至关重要的作用,而VEGF和MVD与微血管生成密切相关。LMWH能通过降低VEGF和MVD而起到抑制乳腺癌血管生成的作用。     

p16、Ki-67双染在子宫颈上皮内病变病理诊断和分级中的应用

目的: 探讨p16 和Ki-67免疫组织化学（免疫组化）双染在子宫颈（以下简称宫颈）上皮内病变病理诊断和分级中的应用价值。方法: 应用免疫组化双染检测15例子宫颈不成熟鳞状化生(immature metaplasia,IM)、32例低级别鳞状上皮内病变即子宫颈上皮内瘤变Ⅰ级（cervical intraepithelial neoplasia Ⅰ,CINⅠ）、90例高级别鳞状上皮内病变即CIN Ⅱ和CIN Ⅲ患者的病理组织中p16 和Ki-67蛋白的共表达情况,分析其与宫颈上皮内病变临床病理诊断及分级间的关系。结果: 在单染切片中,p16在IM组织中呈阴性;在CIN Ⅰ组织中呈不连续、片状或斑片状分布,阳性强度弱,阳性细胞分布于鳞状上皮层下1/3;而在CIN Ⅱ和CIN Ⅲ组织中呈鳞状上皮中下2/3甚至全层连续、弥漫强阳性,p16在IM及CIN Ⅰ~Ⅲ组织中的阳性率分别为6.67%、62.50%、88.89%、95.56%,4组间比较差异有统计学意义(P<0.05)。Ki-67在IM组织中主要表达于鳞状上皮基底层和旁基底层;在CIN Ⅰ组织中则主要表达于鳞状上皮层的下1/3;在CIN Ⅱ、CIN Ⅲ组织中Ki-67阳性细胞可分布于鳞状上皮的中下2/3甚至全层,IM及CIN Ⅰ~Ⅲ组织中Ki-67指数均值分别为7.21%、16.41%、33.54%、50.32%,4组间比较差异有统计学意义(P<0.05)。在双染切片中,双染不会导致Ki-67阳性信号的缺失,p16阳性区域中,Ki-67指数均值为36.47%;p16阴性区域中,Ki-67指数均值为10.53%,且随着宫颈上皮内病变级别增加,p16和Ki-67共表达的例数逐渐增多, 在IM、CIN Ⅰ级、CIN Ⅱ级、CIN Ⅲ级组织中共表达率分别为0、51.35%、85.45%、99.42%,组间比较差异有统计学意义（P<0.05）。结论: p16、Ki-67在子宫颈鳞状上皮内病变中的共表达与 CIN 级别呈正相关,免疫组化双染对宫颈上皮内病变的诊断和分级具有重要价值。