小鼠子宫颈癌爪垫皮下移植后侵袭程度和转移间的关系

将小鼠子宫颈癌14号瘤细胞移植于小鼠爪垫皮下,在不同间隔时间切除一批荷瘤动物的后下肢(含原发瘤),所有小鼠均于瘤细胞接种后26d处死。观察肿瘤在局部的侵袭程度及肺,淋巴结出现转移的时间及程度.结果表明,瘤细胞在移植后2d开始侵袭,3和5d侵袭达Ⅱ～Ⅲ级,7、9和11d侵袭达Ⅲ～Ⅳ级。肿瘤移植后7d出现淋巴结转移,9d发生肺转移。11d肺和淋巴结转移占80％。可见局部肿瘤达到Ⅲ级侵袭方出现转移。     

THE INTERRELATIONSHIP BETWEEN TUMOR CELLS＇ ELECTROPHORETIC MOBILITY，ADHESIVE AND INVASIVE ABILITIES，AND THEIR METASTATIC POTE

ＴＨＥＩＮＴＥＲＲＥＬＡＴＩＯＮＳＨＩＰＢＥＴＷＥＥＮＴＵＭＯＲＣＥＬＬＳ＇ＥＬＥＣＴＲＯＰＨＯＲＥＴＩＣＭＯＢＩＬＩＴＹ，ＡＤＨＥＳＩＶＥＡＮＤＩＮＶＡＳＩＶＥＡＢＩＬＩＴＩＥＳ，ＡＮＤＴＨＥＩＲＭＥＴＡＳＴＡＴＩＣＰＯＴＥＮＴＩＡＬＧａｏＪｉｎ（...     

宫颈鳞癌和宫颈腺癌卵巢转移比较及危险因素分析

[目的]探讨宫颈鳞癌与宫颈腺癌卵巢转移的特点及高危因素.[方法]分析2004年1月- 2010年1月625例术后病理诊断为宫颈鳞癌和腺癌患者的临床病理资料,其中鳞癌355例,平均年龄50.5岁;腺癌270例,平均年龄49.5岁.比较宫颈鳞癌和腺癌卵巢转移发生率及患者年龄、肥胖、月经情况、组织学类型、分化程度、宫旁浸润、子宫内膜受侵、肿瘤大小、临床分期、淋巴结转移与卵巢转移之间的关系.[结果]625例患者中22例(3.5％)有卵巢转移,宫颈腺癌卵巢转移发生率( 17/270,6.3％)显著高于宫颈鳞癌(5/355,1.4％,P＜ 0.01).41～50岁、绝经前、Ⅱb、肿瘤直径＞4 cm的宫颈腺癌患者卵巢转移发生率均显著高于宫颈鳞癌.宫颈低分化腺癌卵巢转移率高于宫颈低分化鳞癌(P＜0.05).子宫内膜浸润、淋巴结转移与宫颈鳞癌及腺癌卵巢转移均相关,而宫旁浸润与宫颈腺癌卵巢转移相关.临床分期Ⅱb期是宫颈鳞癌卵巢转移的独立显著变量,肿瘤超过4cm是宫颈腺癌卵巢转移的独立显著变量.[结论]宫颈腺癌卵巢转移发生率高于宫颈鳞癌,宫颈鳞癌卵巢转移发生率与临床分期密切相关,而宫颈腺癌卵巢转移与肿瘤大小密切相关.     

Maspin基因在不同转移习性的人鼻咽癌细胞株中表达水平的研究

目的:在mRNA和蛋白水平检测5种不同转移习性的人鼻咽癌细胞株中Maspin基因表达的差异,探讨Maspin基因与已知转移习性人鼻咽癌细胞株之间的相关性,为鼻咽癌发生转移的可能机制及临床预测转移风险提供理论基础。方法:体外培养SUNE-1-5-8F、SUNE-1、CNE-2Z、CNE-1、SUNE-1-6-10B 5株不同转移习性的人鼻咽癌细胞株。用RT-PCR及Western blot 2种方法在mRNA和蛋白水平检测5种人鼻咽癌细胞株中Maspin基因表达情况。结果:Maspin基因在SUNE-1-5-8F、SUNE-1、CNE-1及SUNE-1-6-10B细胞株均有不同程度表达,差异无统计学意义（P>0.05）,在CNE-2Z细胞株中不表达,且在mRNA和蛋白水平Maspin基因表达具有一致性;Maspin基因在不同转移习性人鼻咽癌细胞株中mRNA和蛋白表达量总体存在差异（P<0.05）,但表达量不随鼻咽癌细胞株转移习性增高而降低（P>0.05）。结论:Maspin基因在不同转移习性的人鼻咽癌细胞株中mRNA和蛋白表达量不同;Maspin基因可能与人鼻咽癌细胞株的转移潜能无相关性。     

Macrophage migration inhibitory factor enhances neoplastic cell invasion by inducing the expression of matrix metalloproteinase 9 and interleukin-8 in nasopharyngeal carcinoma cell lines

Background Nasopharyngeal carcinoma (NPC) shows highly invasive and metastatic features. This study aims to investigate macrophage migration inhibitory factor (MIF)-induced invasion of NPC cells in vitro and the effects on matrix metalloproteinases (MMPs) and interleukin-8 (IL-8), and to study the mechanism of tumor cell invasion and metastasis in the early stage of NPC. Methods Two nasopharyngeal carcinoma cell lines, CNE-1 and CNE-2, were adopted in this study. The NPC cell invasion and migration were evaluated by microinvasion assay. The variation of expression percentages of MMP2- or MMP9-positive cells was detected by flow cytometry in two cell lines with or without MIF treatment. Western blotting and RT-PCR were used to assay the protein and mRNA expressions of MMP2 and MMP9. The IL-8 concentration secreted by NPC cells was compared with the cells with different treatments using ELISA. Results After treating with MIF for 48 hours, the cell numbers of CNE-1 and CNE-2 which went through the 8-μm filter membrane were increased. Compared with non-MIF treated NPC cells, significant difference could be found both in CNE-1(P=0.005) and CNE-2 cells (P=0.001) . The percentages of MMP9-positive cells were significantly increased in both CNE-1 ［from （28.5±2.5）% to （82.4±3.5）%, P=0.001］ and CNE-2 ［from （32.8±3.5）% to （86.1±1.6）%, P=0.002］. The relative intensity of MMP9 protein expression was also enhanced in both cell lines (CNE-1: from 83.1±6.0 to 242.9±22.9, P=0.002; CNE-2: from 84.4±4.3 to 278.9±29.7, P=0.003). Correspondingly, the increased MMP9 mRNA expression level was significantly detectable in both cell lines.The concentration of IL-8 in the supernatant of CNE-2 was higher ［(1201.8±593.3） pg/ml］ after treatment. It was also remarkably higher than that in the supernatant of CNE-2 without treatment (P=0.026). However, there was no significant difference in the concentration variation of IL-8 in CNE-1 (P=0.581), while the IL-8 mRNA level was only enhanced in CNE-2. Conclusions MIF can induce potent invasion of NPC cell lines in vitro, and the infiltrating lymphocytes in NPC might be responsible for the invasion and metastasis of tumor cells. MIF cytokine which is secreted by these infiltrating lymphocytes might contribute to the invasion as well as metastasis of NPC in the early stages by induction of MMP9 and IL-8 in an indirect pathway.     

Metastatic ovarian squamous cell carcinoma

Ovarian squamous cell carcinoma is usually associated with germ cell tumours (dermoid cyst) or endometriosis in primary cancer. While tumour metastasis to the ovary is common and often bilateral in over 50 percent of cases, metastatic cervical squamous cell carcinoma to the ovary is infrequent compared to adenocarcinoma from other extraovarian primaries and the cervix. We report two cases of unilateral metastatic ovarian squamous cell carcinoma from the uterine cervix in two women aged 38 years and 48 years, respectively. They presented with abdominopelvic masses, clinically thought to be tuberculosis and primary ovarian tumour, respectively. Both had laparotomy which revealed multinodular ovarian masses with extensive extra-ovarian involvement of the corpus and uterine cervix by tumour and omental seedlings. Tissue microscopy showed total replacement of ovarian stroma by tumour with necrotic foci and containing infiltrating nests and cords of malignant squamous cells with prominent intercellular bridges. No evidence of teratoma or endometriosis was seen in the histology sections. They were both diagnosed with metastatic ovarian squamous cell carcinoma with advanced stage disease primary in the uterine cervix. Ovarian metastatic squamous cell carcinoma from the uterine cervix may occur with advanced stage cervical carcinoma. Unilateral multinodular ovarian mass with extensive extra-ovarian tumour involvement should raise suspicion of metastasis rather than of primary tumour. Early and prompt diagnosis is desirable in the management of these patients.     

长非编码MALAT1基因在人鼻咽癌细胞株的表达及生物学意义

目的探讨MALAT1在鼻咽癌细胞细胞株中的表达及生物学功能。方法通过Real-time PCR检测MALAT1基因在鼻炎
癌细胞株5-8F、C666-1、CNE-1、CNE-2、HONE-1、6-10B及永生化鼻咽上皮细胞NP69株中的表达;采用RNAi技术和RNA激活
技术,构建MALAT1慢病毒干扰载体和激活载体载体并稳定转染鼻咽癌细胞株CNE-1,采用CCK8、平板克隆、划痕等试验分析
MALAT1基因对CNE-1细胞生物学行为的影响。结果MALAT1在高转移的鼻咽癌细胞株中高表达,在正常鼻咽上皮细胞低
表达;经激活过表达MALAT1 后,CNE-1 细胞的上皮性标志物E-Cadherin 的表达显著下调,间质细胞标志物Vimentin 表达上
调,侵袭转移能力明显增强（P<0.05）。结论MALAT1基因上调能够促进鼻咽癌CNE-1细胞的增殖、侵袭和转移能力。
     

癌细胞侵袭和淋巴道转移过程中血液变学的观察

Mouse transplantable hepatoma (H22) was used as an experimental model for lymphatic metastasis. The tumor cells were transplanted subcutaneously into right footpads of inbred 615-strain mice. The hemorheological changes during invasion and lymphatic metastasis in mice were observed. The results of histological examination showed that tumor invasion was divided into early, middle and late invasive stages, and the metastasis was divided into early, middle, late and final metastasis periods. Tumor invasion began 3 days after tumor transplantation, and the late stage of invasion was found at 9 days. Metastasis began 6 days after transplantation; at 19 days metastasis to lymph nodes in the right side reached grade IV. Metastasis to lymph nodes in the left side appeared 14 days after tumor transplantation. In the early and middle invasive stages only plasma viscosity increased significantly, while other hemorheological values were unchanged. The blood viscosity and aggregation of red blood cells decreased significantly after the metastatic late stage. The hematocrit of red blood cells began to decrease in the final stage of metastasis, and in the meantime, the rigidity of red blood cells began to increase, while plasma viscosity showed no changes after the late metastatic stage. The results and mechanism of hemorheological changes are discussed.     

miRNA-143对人鼻咽癌细胞CNE-2Z增殖、迁移和侵袭的影响

目的 探讨miRNA-143对鼻咽癌细胞CNE-2Z增殖、迁移和侵袭的影响.方法 利用荧光定量PCR检测人永生化鼻咽上皮细胞(NP69)、高分化鼻咽癌细胞(CNE-1)、低分化鼻咽癌细胞(CNE-2Z)中miRNA-143的表达水平.利用感染慢病毒的方式建立稳定过表达miRNA-143的CNE-2Z细胞,并用荧光定量PCR法进行检测.通过CCK-8法检测过表达miRNA-143对CNE-2Z细胞增殖的影响,通过Transwell迁移和侵袭试验分析过表达miRNA-143对CNE-2Z细胞迁移和侵袭的影响.结果 低分化鼻咽癌细胞(CNE-2Z)中miRNA-143的表达水平显著低于CNE-1和NP69细胞(P<0.01).稳定过表达miRNA-143的CNE-2Z细胞(CNE-2Z/miR-143)中miRNA-143的表达水平显著高于CNE-2Z细胞(P<0.01)和慢病毒对照组细胞(CNE-2Z/miR-NC)(P<0.01).细胞增殖能力检测显示,与CNE-2Z组和CNE-2Z/miR-NC组相比,CNE-2Z/miR-143组在72 h和96 h时细胞活力显著降低(P<0.05,P<0.01).Transwell迁移和侵袭试验结果显示,CNE-2Z/miR-143组与CNE-2Z组和CNE-2Z/miR-NC组相比细胞迁移和侵袭能力显著下降(P<0.01).结论 miR-143能够抑制鼻咽癌细胞CNE-2Z的增殖、迁移和侵袭能力,提示其可能对鼻咽癌的诊断、治疗及预后评价有重要意义.     

Intensity of cervical inflammatory reaction as a risk factor for recurrence of carcinoma of the uterine cervix in stages IB and IIA.

CONTEXT AND OBJECTIVE: Inflammatory reaction intensity has been indicated as a possible recurrence risk factor in carcinoma of the uterine cervix. Some authors observed greater risk with weak inflammatory reaction, while others described the opposite. This study aimed to evaluate risk factors for initial-stage uterine cervix carcinoma recurrence (IB and IIA), considering inflammatory reaction intensity. DESIGN AND SETTING: Retrospective cohort at Hospital do Cancer A. C. Camargo. METHODS: 289 patients with diagnosed uterine cervix carcinoma (stages IB and IIA) who underwent radical surgery between 1980 and 1999 were studied. Data were collected from medical records. Histological sections from tumors and lymph nodes could be reviewed in 247 cases. Five-year disease-free survival rates were calculated using the Kaplan-Meier method and curves were compared using the log-rank test. Cox's proportional-hazards model was used for multivariate analysis. Recurrence risk was estimated using hazard ratios (HR). RESULTS: Forty-three recurrences were found. Multivariate analysis identified the following independent recurrence risk factors: number of metastatic pelvic lymph nodes (one lymph node: HR = 3.3 [1.3-8.3]; two or three: HR = 5.3 [1.5-18.6]; four or more: HR = 7.6 [1.7-33.2]), tumor invasion depth (deepest third: HR = 2.1 [1.1-4.1]) and inflammatory reaction intensity in the uterine cervix (absent or slight: HR = 2.5 [1.1-5.7]). CONCLUSION: This study identified that absent or slight inflammatory reaction was an independent risk factor for recurrence. The other risk factors were the number of metastatic pelvic lymph nodes and invasion of the deepest third of the uterine cervix.     

细胞粘附分子在大肠癌浸润转移中的表达及其临床意义

目的:研究细胞粘附分子(CAMs)在大肠癌浸润转移过程中的作用。方法:应用免疫组化LSAB法,检测CAMs家族CEA,CD44s及CD44v9在正常肠上皮、大肠癌原发灶组织中表达的改变。结果:大肠癌细胞中CAMs的分布极性发生了明显改变;癌细胞的表达强度与正常肠上皮明显不同;在原发灶组中,CEA和CD44s的表达呈显著正相关,CD44v9的表达与肿瘤的分化程度和Dukes分期密切相关。结论:CAMs以分布极性的变动以及表达程度的改变影响着癌细胞的侵袭表型,在大肠癌浸润转移的过程中起着重要作用。CD44s和CD44v9有可能作为新的肿瘤标志物,用于癌症的辅助诊断或转移潜能的筛选。     

鼻咽癌细胞株中乳腺癌转移抑制基因表达的研究

目的:检测乳腺癌转移抑制(BRMS1)基因在不同转移习性的人鼻咽癌细胞株中的表达情况。方法:应用免疫组织化学法和逆转录聚合酶链式反应法在mRNA和蛋白2方面检测人鼻咽癌细胞株高分化磷癌、低分化磷癌、低分化细胞株、高成瘤高转移性细胞株、低成瘤低转移性细胞株中BRMS1的表达。结果:5种细胞株中BRMS1的蛋白表达皆为阳性,在不同转移习性的细胞株中其表达强度明显不同。4种细胞株中扩增出BRMS1 mRNA,而BRMS1 mRNA在高转移性细胞株中未扩增出,高分化鳞癌、低分化鳞癌、低分化细胞株BRMS1mRNA表达水平均显著高于低成瘤低转移性细胞株(P<0.01)。结论:BRMS1的表达与细胞株的转移能力有明显相关性,表明BRMS1可能作为鼻咽癌细胞转移的重要指标。     

转染人乳头瘤病毒的宫颈癌U14移植同系小鼠后的生长特性和转移规律

目的 :探讨转染人乳头瘤病毒 (HPV)的小鼠宫颈癌U1 4移植同系小鼠后生长特性和转移规律。方法 :用电穿孔法及阳离子脂质体将HPV 1 6型的早期基因E6 ,E7分别转染小鼠宫颈癌U1 4,筛选、鉴定表达E6 ,E7的转化细胞即E6 +U1 4,E7+U1 4,然后分别经皮下和腹腔移植于同系小鼠 ,观察其生长特性和转移规律。结果 :皮下移植野生型U1 4,E6 +U1 4及E7+U1 4后 ,出瘤时间分别为 5～ 7d ,1 1～ 1 4d及 8～ 1 0d (P <0 .0 5 ) ;平均生存期分别为 2 9d ,43 .3d及 3 5d ;淋巴转移率分别为 90 % ,3 0 %及 40 % ;肺转移率分别为 6 0 % ,1 0 %及 2 0 %。腹腔内移植后 ,荷瘤小鼠平均寿命分别为 1 4.2d ,2 0 .6d及 1 8.3d ;未发现淋巴和肺转移。结论 :转染HPV的小鼠宫颈癌U1 4移植同系小鼠后 ,显示出与移植野生型不同的生长特性和转移规律。该模型为研究以HPVE6 ,E7为靶的免疫或其他方法治疗宫颈癌提供了有价值的动物模型。     

Effect of tumor suppressor gene KAI1 on the biological behaviors of human colorectal carcinoma]

OBJECTIVE: To determine whether the expression of tumor suppressor gene KAI1 can suppress the invasive or metastatic ability of colorectal carcinoma cells. METHODS: KAI1 cDNA was transfected into highly malignant colorectal carcinoma cell line LoVo, which had low levels of endogenous KAI1 expression. The expressions of KAI1 mRNA and protein were determined by immunohistochemistry and in situ hybridization, and the biological behaviors of the KAI1-transfected LoVo cells were investigated by cell-cell adhesion, cell-matrix adhesion and invasion assays. RESULTS: KAI1 expression significantly suppressed the metastatic potential of KAI1-transfected LoVo cells, whose metastasis suppression was correlated with the increased adhesion to homotypic cells and reduced tumor adhesion to extracellular matrix components. KAI1 expression significantly suppressed the in vitro cell invasion in KAI1-transfected LoVo cells. CONCLUSION: KAI1 might function as inhibitor of colorectal carcinoma metastasis.     

DCE-MRI双室模型和IVIM模型各参数对宫颈癌的诊断价值及参数间的相关性

目的：分析动态对比增强磁共振成像（DCE-MRI）双室模型（CC）与体素内不相干运动（IVIM）两种模型各参数对宫颈癌的诊断价值，并探讨CC及IVIM模型灌注相关参数的相关性。方法：2016年4月至2018年12月间温州医科大学附属第二医院育英儿童医院病理确诊的宫颈癌32 例和健康对照14 例，所有患者于治疗前行MRI检查，包括IVIM及DCE-MRI序列，获得CC模型各参数：血流量（Fp）、血浆容积分数（Vp）、血管外细胞外间隙容积分数（Ve）、渗透率表面积产物（PS）。IVIM模型各参数：真扩散系数（D）、假扩散系数（D*）、灌注分数（f），以及两者的乘积（fD*）。比较上述参数在宫颈癌及正常宫颈的差异，并进行ROC曲线分析。采用Spearman法分析两种模型灌注参数的相关性。结果：CC模型各参数（Vp、Ve、PS）在宫颈癌和正常宫颈组织间的差异有统计学意义（P ＜0.05），CC模型各参数ROC曲线下面积为0.546～0.852，其中CC-PS的AUC值＞0.8，CC-Ve的AUC值＞0.7。IVIM模型各参数（D、D*、f、fD*）在宫颈癌和正常宫颈组织间的差异有统计学意义（P ＜0.05）。IVIM模型各参数ROC曲线下面积为0.642～0.953，其中IVIM-D、IVIM-f及IVIMfD*的AUC值＞0.8。在宫颈癌中，IVIM-f、IVIM-fD*与CC-Ve存在轻度的相关关系（0.3＜r ≤0.5）。结论：CC模型及IVIM模型定量参数对宫颈癌微循环的评价及诊断价值较高，宫颈癌IVIM灌注相关参数有潜力作为非侵入性检查方法评价肿块的微循环状态。     

构建大肠癌转移动物模型的研究进展

建立合适的动物模型是研究结直肠癌发病及转移机制的重要方式之一。理想的肿瘤转移模型应当具备:肿瘤成瘤潜伏期短、转移率高、病死率低或死亡等不良事件发生较晚,并且能共模拟结直肠癌临床生物学等特点。直接将结直肠癌细胞注射入循环系统的实验性转移模型是快速建立肝、肺转移的方法。而原位或皮下移植瘤的自发性转移模型则能反映肿瘤突破基底层侵袭扩散的转移早期过程。如何选择应由研究的目的来决定。     

葡萄糖调节蛋白78在卵巢癌侵袭转移中的作用

目的探讨葡萄糖调节蛋白78（GRP78）在卵巢癌侵袭转移中的作用。方法免疫组织化学法检测60例卵巢浆液性癌和40例卵巢浆液性囊腺瘤组织中GRP78的表达情况,Western blotting法检测GRP78的表达水平,分析GRP78的表达与卵巢浆液性癌临床病理指标之间的关系。采用Transwell小室法检测HO-8910细胞和HO-8910PM细胞侵袭、迁移能力;分别使用shRNA-GRP78干扰和pcDNA-GRP78过表达GRP78检测HO-8910PM细胞和HO-8910细胞侵袭、迁移能力的变化。结果免疫组织化学结果显示,GRP78在卵巢浆液性癌组织中的阳性表达率为90%,明显高于卵巢浆液性囊腺瘤的25%（P＜0.01）。GRP78在卵巢浆液性癌组织中表达水平高于卵巢浆液性囊腺瘤组织。GRP78表达水平高的卵巢浆液性癌病人,临床病理分级、分期更高,糖类抗原125水平更高,且发生淋巴结转移、盆腔转移、盆腔外转移的病人比例更高（P＜0.01）。体外研究结果显示,GRP78在高转移潜能的HO-8910PM细胞中的表达明显高于低转移潜能的HO-8910细胞（P＜0.01）。在HO-8910细胞中过表达GRP78可明显促进细胞的侵袭、迁移能力,而在HO-8910PM细胞中干扰GRP78的表达可明显降低细胞的侵袭、迁移潜能（P＜0.01）。结论卵巢癌组织中GRP78可促进卵巢癌细胞的侵袭、迁移能力。     

小鼠子宫颈癌转移模型及形态学研究

小鼠子宫颈癌(U_(14))移植于成年鼠。新生鼠的背部及爪垫皮下、腹腔。分别于第12h～38d处死行组织学及电镜检查。结果:(1)新生鼠皮下组在移植后第12h已见淋巴管中癌细胞栓,第42h肺泡壁毛细血管中见癌细胞栓,第2～3d肺组织已见明显的癌转移。提示新生鼠皮下移植是癌转移最迅速的动物模型。(2)癌在新生鼠皮下组织侵袭过程中未见明显潜伏期。(3)宿主年龄是癌浸润与转移的重要因素。(4)针吸细胞学检查对腹水癌病例并不安全。     

EGFR反义RNA的转染对人类鼻咽癌CNE－2细胞EGFR的表达下调及恶性表型的抑制

目的 利用反义RNA抑制靶基因表达的策略，下调EGFR的表达而探讨对人类低分化鼻咽癌CNE-2细胞的恶性表型的抑制性效应。方法 将人EGFR的N-端1．35kb片段反向构建人逆转录病毒表达载体pLXSN中，并用脂质体介导转染人鼻咽癌CNE-2细胞，G418筛选并分离阳性克隆，将两个EGFR反义cDNA转染的克隆细胞命名为CNE-2／AS4和CNE-2／AS8，而空载体转染的细胞命名为CNE-2／pLXSN。125I-EGF配体结合分析细胞膜上EGFR的表达，台盼蓝染色法测定细胞生长的改变，并用软琼脂集落形成实验检测细胞转化，最后，将筛选的各组阳性克隆细胞分别注射人裸鼠皮下，不同时间观察肿瘤生长的抑制改变及肿瘤的转移状况。结果配体结合实验结果显示。两个选择的克隆CNE-2／AS4和CNE-2／AS8细胞表面EGFR的数量分别较未转染细胞CNE-2下降18％、45％，表明EGFR反义RNA的表达下词了细胞膜上EGFR的表达；同时，EGFR反义RNA表达的CNE-2细胞生长速率和软琼脂生长能力也较对照组细胞明显降低。注射入裸鼠皮下后，EGFR反义RNA表达的阳性克隆细胞表现出肿瘤生长减慢。淋巴结和肺转移能力也明显降低。结论这些实验结果提示EGFR反义cDNA转染的CNE-2细胞能下调：EGFR的过量表达并部分抑制鼻咽癌的恶性表型，这为进一步阐明：EGFR在鼻咽癌的发生、演化中的功能作用提供了有用的工具。     

T淋巴瘤侵袭转移诱导因子1在甲状腺癌中的表达

目的探讨T淋巴瘤侵袭转移诱导因子l（Tlymphoma invasion and metastasis inducing factorl，Tiam 1）表达与甲状腺癌侵袭转移的关系。方法采用免疫组织化学S—P法检测Tiam 1在甲状腺癌及其淋巴结转移癌石蜡组织标本中表达。结果淋巴结转移癌组织中Tiam 1表达显著高于甲状腺癌原发灶中的表达（P〈0．05）；伴发转移的甲状腺癌组织比未发生转移的甲状腺癌组织Tiam 1表达明显增强（P〈0，05）；甲状腺髓样癌、未分化癌组织中Tiam1表达显著高于在乳头状癌、滤泡癌中的表达（P〈0．05）；高临床分期（ⅡI、IV期）甲状腺癌组织中Tiam 1表达明显高于其在低临床分期（I、Ⅱ期）中的表达（P〈0，05）。结论Tiam 1表达与甲状腺癌侵袭转移密切相关，提示Tiam 1在甲状腺癌侵袭转移中起重要作用。