E-Cadherin、CD44v6在肾脏恶性肿瘤中的表达及意义

目的探讨E—Cadherin和CD44v6在。肾脏恶性肿瘤中的表达及临床意义。方法选择肾脏恶性肿瘤组织30例和正常肾组织10例,采用免疫组织化学法检测肾脏恶性肿瘤组织和正常肾组织中E—Cadherin、CD44v6的表达,比较两组之间的差异,并分析E—Cadherin和CD44v6与肾脏恶性肿瘤的临床分期、病理分级及淋巴结转移的关系。结果肾脏恶性肿瘤组织E—Cadherin表达显著低于对照组（P〈0．01）,CD44v6表达显著高于对照组（-P〈0．05）。E—Cadherin表达在不同病理分级之间差异不显著（P〉0．05）,CD44v6表达在不同病理分级之间差异显著（P〈0．01）。E—Cadherin、CD44v6表达在不同临床分期之间比较差异有统计学意义（P〈0．05）：E—Cad—herin在有淋巴结转移的肾脏恶性肿瘤组织表达显著低于无淋巴结转移（P〈0．05）。结论E—Cadherin表达下调和CD44v6升高在肾脏恶性肿瘤的发生、发展、浸润等过程中发挥重要的作用。     

EGFR、ER、E-Cadherin在乳腺癌中的表达及其临床意义

目的 观察研究表皮生长因子受体(EGFR)、雌激素(ER) 、E-Cadherin在乳腺癌中的表达及其临床意义.方法 应用免疫组织化学检测77例乳腺癌组织中EGFR、ER、E-Cadherin的表达.结果 77例乳腺癌中,EGFR、ER 、E-Cadherin的阳性表达率分别为29.9％(23/77)、70.1％(54/77)、94.8％(73/77).ER与患者年龄有统计学意义(P＜0.05).结论 ER、E-Cadherin在乳腺癌组织中的高表达与乳腺癌的发生发展密切相关,多种标志物的联合检测可以为乳腺癌的诊疗和评估预后提供新的方法和思路.     

Ubenimex Activates the E-Cadherin-mediated Adhesion of a Breast Cancer Cell Line YMB-S

It has been reported that ubenimex, a biological response modifier, has a direct anti-tumor effect. To clarify the mechanism involved, we examined the effects of ubenimex on the growth and adhesive property of a breast cancer cell line YMB-S. The cells proliferate in a floating manner without aggregation in normal complete medium. Ubenimex induced cell-cell and cell-surface adhesion of the cells accompanied with growth suppression. E-Cadherin localized at cell-cell contact sites of adhered cells, and anti-E-cadherin antibody inhibited the adhesion. Both Western blot analysis and binding assay disclosed that there was no apparent difference between E-cadherin levels of the cells before and after the treatment with ubenimex. These results indicate that ubenimex inhibits the proliferation of YMB-S cells and augments cell-to-cell adhesion through the induction of E-cadherin -mediated adhesion resulting from the functional activation of pre-expressed but inefficient E-cadherin.     

胃癌原发灶与转移灶E-钙黏附素mRNA表达水平的比较研究

目的　评价E 钙黏附素 (E CD)mRNA在胃癌原发灶、淋巴结转移灶和腹腔液中的表达水平及其与胃癌生物学行为的关系。方法　采用逆转录聚合酶链反应 (RT PCR)对 35例进展期胃癌癌旁正常黏膜、原发癌组织、转移淋巴结和腹腔液中E CDmRNA水平进行检测 ,并与胃癌的生物学行为和腹膜转移相关因素进行比较。结果　全组癌旁正常黏膜、原发癌组织、转移淋巴结和腹腔液均检出E CDmRNA。与癌旁正常黏膜相比 ,胃癌原发组织E CDmRNA表达水平明显减弱 (P <0 .0 1) ,在浸润型、未分化型、弥漫状生长、侵透浆膜和Ⅲ、Ⅳ期胃癌中 ,其表达水平明显降低 (P <0 .0 5 )。随着淋巴结转移数目增加 ,胃癌原发灶中E CDmRNA表达水平也显著降低 (P <0 .0 5 ) ,但淋巴结转移灶中E CDmRNA表达明显增高 ,与其分化程度无关。转移淋巴结与相应原发灶的E CDmRNA表达指数差值在浸润型、未分化型、弥漫状生长、侵透浆膜、淋巴结转移严重及Ⅲ、Ⅳ期胃癌组织中明显增高 (P <0 .0 5 )。腹腔液中E CDmRNA表达指数在侵透浆膜、腱状及多彩型浆膜、ECC阳性者明显增高 (P <0 .0 1)。结论　胃癌原发灶的E CDmRNA表达水平降低 ,且表达水平与胃癌的恶性生物学行为呈正相关 ;胃癌转移淋巴结的E CDmRNA表达水平增高 ,并与胃癌的恶性生物学行为呈负相关。     

nm 23H1 和E-Cadherin 基因产物在卵巢浆液性囊腺癌中的表达

 目的　探讨肿瘤转移抑制基因 nm23H1和粘附分子 E- Cadherin与卵巢浆液性囊腺癌临床及生物学行为之间的关系。方法　用免疫组化 SP法常规步骤检测 nm23H1和 E- Cadherin基因产物在组织中的表达。结果　 48例肿瘤原发灶和相应淋巴结中 ,nm23H1蛋白表达阳性率 64.58% (31 /48) ;E- Cadherin蛋白阳性率为 45.83% (2 2 /48)。二种基因蛋白表达与临床分期明显负相关 (P<0 .0 5)。 nm23H1蛋白表达与组织学分级负相关 (P<0 .0 0 5)。同一标本中 ,二种基因产物表达有较好相关性和一致性。结论　nm23H1和 E- Cadherin基因在卵巢浆液性囊腺癌的发展转移中起有重要作用。对这 2种基因的共同检测 ,可能会增加研究结果分析的客观性和准确性。     

Ras Farnesylation Inhibitor FTI-277 Restores the E-Cadherin/Catenin Cell Adhesion System in Human Cancer Cells and Reduces Cancer Metastasis

The E-cadherin/catenin cell adhesion system is often down-regulated in epithelial tumors. This is thought to play an important role in cancer invasion and metastasis, and restoration of this system may suppress metastatic spread of cancer. In this study, the effects of a Ras farnesylation inhibitor (FTI-277) on E-cadherin-mediated cell-cell adhesion and metastatic potential were examined. In cell aggregation assays, FTI-277 stimulated aggregation of colon, liver and breast cancer cells. In vitro cultures of cancer cells showed that FIT-277 induced strong cell-cell contact. Immunoblotting analysis showed that FTI-277 increased E-cadherin/catenin (α, β and γ) expression and strongly stabilized E-cadherin/catenin with the actin cytoskeleton. Northern blotting studies indicated that the observed increase in the E-cadherin/catenin protein content was due to increased expression of their genes. After inoculation of the spleens of mice with severe combined immunodeficiency (SCID) with cancer cells, FTI-277 treatment for 3 weeks markedly reduced splenic primary tumor growth and the rate of liver metastasis compared with control counterparts. Our data demonstrate that FTI-277 can activate functioning of the E-cadherin-mediated cell adhesion system, which is associated with suppression of cancer cell metastasis. Therefore, selective inhibition of Ras activation may be useful for preventing cancer metastasis.     

钙粘素在上皮性卵巢肿瘤中的表达

目的：检测Ｅ－钙粘素（Ｅ－Ｃｄ）在卵巢上皮性肿瘤的表达情况,并了解Ｅ－Ｃｄ表达的临床意义。方法;用特异性抗Ｅ－Ｃｄ单克隆抗体,以ＳＰ免疫组化阖,检测７８例卵巢上皮性肿瘤中Ｅ－Ｃｄ表达,结合临床病理情况,进行统计学。结果：１）卵巢粘液性中Ｅ－Ｃｄ表达。２）分化程序降低,Ｅ－Ｃｄ表达率有降低的趋热,但差异无显著性。３）有转移灶者Ｅ－Ｃｄ表达率低。结果：Ｅ－Ｃｄ表达是卵巢粘液性肿瘤的特征,Ｅ－Ｃｄ表达降     

上皮型钙粘蛋白与涎腺肿瘤生物学行为的相关性研究

目的研究上皮型钙粘蛋白(Epithelial Cadherin,E-Cad)在涎腺肿瘤分化、浸润、转移等过程中的表达变化。方法复旦大学附属肿瘤医院口腔颌面部涎腺肿瘤石蜡标本115例,其中良性肿瘤、恶性肿瘤、涎腺慢性炎症分别为50例、57例、8例。用抗E-Cad单克隆抗体作Envision免疫细胞组织化学二步法,完成病理切片,做定量病理分析。结果 E-Cad在良性肿瘤的表达强度高于恶性肿瘤(P=0.017);E-Cad的表达强度与肿瘤的浸润能力明显相关,其中E-Cad在无浸润组的表达强度显著高于包膜外组(P=0.002)。结论 E-Cad在细胞膜外的表达水平与涎腺肿瘤的性质和浸润能力有一定的相关性,在鉴别涎腺肿瘤的良恶性以及涎腺肿瘤包膜是否受到肿瘤细胞的侵袭的过程中有一定的辅助作用,但敏感性并不强,需要与其他鉴别手段结合应用。     

Evaluation of endometrial scratching on intrauterine insemination outcome and endometrial receptivity

Objective

Evaluation of endometrial scratching on pregnancy rates after IUI and comparing levels and distribution of IL-6 (inflammatory molecule) and E-Cadherin (adhesion molecule) by immunohistochemistry.

KAI1/CD82和E-Cadherin蛋白在卵巢上皮性癌中表达的临床意义

目的：探讨肿瘤转移抑制基因KAI1和粘附分子钙粘蛋白基因E Cadherin的表达与卵巢上皮性癌临床病理因素的相关性。方法：对66例肿瘤标本应用免疫组织化学SP法检测KAI1/CD82和E Cadherin蛋白在卵巢上皮性癌组织中的表达,生物学统计采用χ2检验法。结果： KAI1/CD82蛋白表达的阳性率为57.58%（38/66）;E Cadherin蛋白阳性率为46.97%（31/66）。两种基因蛋白表达与肿瘤临床分期及淋巴结转移密切相关,差异有统计学意义（P<0.05）;KAI1/CD82蛋白的表达与肿瘤的组织学分级呈负相关（P<0.05）。在同一标本中,二者表达有较好的相关性和一致性,差异具有统计学意义（P<0.05）。结论：KAI1/CD82和E Cadherin蛋白的表达与卵巢上皮性癌的演进和转移密切相关,检测其表达异常对判断肿瘤的分化、临床进展以及推测预后有一定的参考价值。