Expression of the novel gene NM23-H1B in ovarian cancer

Objective:To study the expression of the human novel gene NM23-H1B in ovarian cancer. Methods: Totally 24 samples from patients with epithelial ovarian tumor at different clinical stages and 4 from normal ovaries were examined for NM23-H1B mRNA expression by RT-PCR and Northern blot. Results: All samples expressed NM23-H1B mRNA through RT-PCR, while the level of expression in ovarian tumor was higher than that of normal ovary. The results of Northern blot showed that NM23-H1B was overexpressed in ovarian cancer while lowexpressed in normal ovary or low malignant potential (LMP). The level of expression at early stage cancer(stageⅠand Ⅱ) was higher than those in advanced cancer(stage Ⅲ and Ⅳ). In early stage carcinoma, the expression level was involved in the differentiation of tumor cell, and well-differentiated cancer expressed NM23-H1B mRNA in comparatively higher level. Conclusion: The novel gene NM23-N1B is closely correlated with the ovarian cancer.

EXPRESSION OF NM23-H1 GENE PRODUCT IN NASOPHARYNGEAL CARCINOMA AND ITS CLINICAL SIGNIFICANCE

Objective: The nm23 gene is one of the tumor metastatic suppressor genes. The expression of nm23H1 has been reported to be inversely associated with metastatic potentiality in a number of human carcinomas, including breast, colorectal, gastric, hepatocellular and gallbladder carcinomas. In this study, the immunohistochemical staining of nm23H1 protein in human nasopharyngeal carcinoma (NPC) was examined, and the relationship between nm23H1 and both metastasis and prognosis of patients with NPC was also investigated. Methods: Routine LSAB immunohistochemistry with the nm23H1 monoclonal murine antibody was employed to study the expression of nm23H1 protein in 95 paraffinembedded specimens of NPC treated at our hospital. The clinical pathologic data and results of followup were also retrieved. Comparisons between patients with and without expression of nm23H1 protein with respect to metastasis, locoregional recurrence and survival were performed using Log rank test. Multivariate prognostic analyses were performed by using Cox's regression model. Results: Nm23H1 negative expressive tumors were associated with a higher incidence of lymphnode metastasis (86.7%) than those of nm23H1 positive (48.6%, P<0.01). Nm23H1 negative expressive tumors were associated with a high incidence of recurrence and distant metastasis after radiotherapy (P<0.05). A significant association was found between expression of nm23H1 and prognosis (P<0.01). The expression of nm23H1 indicated favorable prognosis. Conclusion: It was suggested that nm23 H1 negative expression was significantly associated with lymphnode metastasis, recurrence and distant metastasis. Nm23H1 may have value for predicting the prognosis of NPC.

Changes of histology and expression of MMP-2 and nm23-H1 in primary and metastatic gastric cancer

AIM: To investigate the changes of histology and expression of MMP-2 and nm23-H1 in primary and metastatic gastric cancer. METHODS: One hundred and seventy-seven gastric cancer patients with lymph node and/or distal metastasis between 1997 and 2001 were reviewed. Differences in histology of the primary and metastatic gastric cancer were assessed. MMP-2 and nm23-H1 immunoreactivity was compared in 44 patients with tumor infiltration to the serosa layer. RESULTS: Poorly and moderately differentiated metastatic gastric cancer was found in 88.7% (157/177) and primary gastric cancer in 75.7% (134/177) of the patients. The histological type of metastatic gastric cancer that was not completely in accordance with the preponderant histology of primary gastric cancer was observed in 25 patients (14.1%). MMP-2 immunoreactivity in metastatic gastric cancer was significantly stronger than that in primary gastric cancer, while nm23-H1 immunoreactivity showed no difference in primary and metastatic gastric cancer. CONCLUSION: Metastatic gastric cancer presents more aggressive histological morphology and higher MMP-2 immunoreactivity than primary gastric cancer. This heterogeneity may elicit a possible mechanism of gastric cancer metastasis.

VEGFR-3、MMP-9、nm23-H1蛋白在口腔癌组织中的表达及其临床价值研究

目的:探讨血管内皮生长因子受体3(VEGFR-3)、基质金属蛋白酶-9(MMP-9)、nm23-H1蛋白在口腔癌组织中的表达及其临床价值。方法:选取行手术治疗的口腔鳞状细胞癌患者70例,收集癌组织标本。另选取同期体检健康者70例,采集口腔黏膜组织。采用免疫组织化学染色法检测样本组织VEGFR-3、MMP-9、nm23-H1蛋白表达,分析其与患者临床病理特征的相关性。术后随访5年,记录患者生存情况。分析VEGFR-3、MMP-9、nm23-H1蛋白表达与患者术后5年预后的关系。结果:口腔癌组织VEGFR-3、MMP-9蛋白阳性表达率高于口腔黏膜组织,nm23-H1蛋白阳性表达率低于口腔黏膜组织(均P<0.05)。VEGFR-3、MMP-9蛋白阳性表达患者淋巴结转移比例较高(均P<0.05)。nm23-H1蛋白阳性表达患者淋巴结转移、TNM分期Ⅲ期-Ⅳ期及肿瘤浸润深度>5 mm比例较低(均P<0.05)。口腔癌组织VEGFR-3、MMP-9蛋白表达与淋巴结转移呈正相关(均P<0.05)。m23-H1蛋白表达与淋巴结转移、TNM分期、肿瘤浸润深度呈负相关(均P<0.05)。VEGFR-3、MMP-9蛋白阳性表达患者5年生存率低于阴性表达患者(均P<0.05)。m23-H1蛋白阳性表达患者5年生存率高于阴性表达患者(P<0.05)。结论:口腔癌组织VEGFR-3、MMP-9蛋白高表达,nm23-H1蛋白低表达,三者与淋巴结转移以及口腔癌患者预后有关。

THE ASSOCIATION OF THE EXPRESSION OF MTA1, NM23H1 WITH THE INVASION, METASTASIS OF OVARIAN CARCINOMA

Objective. To understanding the molecular mechanisms in invasion andmetastasis of the ovarian carcinoma, we investigate a novel candidate metastasis―associated gene (MTA1) and nm23Hl mRNA expression and mutation in ovarian carcinoma. Methods. Twenty primary ovariancarcinoma specimens, 20 corresponding lymph nodes and 8 normal ovarian was examined for mRNAexpression and mutation of MTA1 and nm23Hl genes by reverse-transcription ploymerase chain reaction(RT―PCR) and RT―PCR―SSCP analysis. The level of the expression was determined by the relativeoptic desity (ROD) of the PCR products. Results. The frequency of MAT1 overexpression was 100% (7/7)in primary ovarian carcinoma with metastasis but only 38.5% (5/13) in those without metastasis(P=0.0103). Overexpression of MAT1 was observed in 87.5% (6/7) of lymph nodes with metastasis butonly 23% (3/13). of lymph nodes without metastasis (P=0.0118). In contrast with MAT1, low expressionof nm23H1 mRNA was seen in 7 of 7 o-varian carcinoma with metastasis but only in 4 of 13(30%) ofthose without metastassis (P=0.0043). Low nm23H1 expression was also seen in 7 of 7 lymph nodes withmetastasis but only in 5 of 13 (38.5%) nonmetastatic lymph nodes (P=0.0102). The ROD ratio of MAT1to nm23Hl increased with the development of metastasis. No mutation of MAT1 and nm23H1 genes wasfound by SSCP analysis. Conclusion. The mRNA expression of MTA1 and nm23H1 is positively andnegatively correlated with lymph node metastasis, respectively. Expression abnormalities but notmutation of the two genes are frequent events related to lymph node metastasis of ovarian cancer.

Expression of nm23 gene in hepatocellular carcinoma tissue and its relation with metastasis

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The Correlation of p53 and nm23－H1 Expression with Invasivenes and Metastasis in Esophageal Carcinoma

Objective:To study the relationship between expression of p53 and nm23-H1 and differentiation,invasiveness and metastasis in human esophageal carcinoma,and the correlation between expression of p53 and nm23-H1.Methods:Expression of p53 and nm23-H1 in 50 patients with squamous cell carcinoma of esophagus was detected by using immunohistochemical S-P methods.Results:35 caes(70%) and 32 cases(64%) of esophageal squamous cell carcinoma were positive for nm23-H1 protein and p53 protein,respectivel.The expression of nm23-H1 was related to lymphatic metastasis(P<0.025),but not related to tumor differentiation,invasiveness,tumor location,tumor length,patient's gender and age（P>0.05).The lymphatic metastasis location positive group had a very lower expression of nm23-H1 and the negative rage was 70.8% ,but the negative group had a higher expression and the positive rate was 65.4% ,The expression of p53 was related to tumor differentiation and invasiveness(P<0.05) ,but not related to lymphatic metastasis,tumor location,tumor length,patient's gender and age(P>0.05).Among the three grups,the high differentiation group had the lowest expression of p53 and the positive rate was 29.2%,but the low differentiation group had the highest positvie rate(71.4%) ,As for tmor invasiveness,the group of outer membrane of esophagus infiltrated had the highest p53 proten positive rate (56%) .but in the group of mucous or submucous layer infiltrated p53 protein was not detectable.The low expression of nm23-H1 and the high expression of p53 were also correlated.The expression of nm23-H1 and p53 were both correlated with TNM stage of esophageal carcinoma (P<0.05).The better esophageal carcinomas differentiated,the lower nm23-H1 expressed and higher p53 expressed.Conclusion Low expression of nm23-H1 and high expression of p53 play an important role in the progression of squamous cell carcinoma of esophagus.Nm 23-H1 might be a gene marker in the prophecy of patients' prognosis and benefit tumor treatment clinically.

The Regulating Effect of the nm23-H1 Gene for PKA Signal Pathway of Lung Cancer Cell and Its Molecular Mechanism

Backgroud and Objective Lung cancer has become the most frenquent malignant tumor in the world which its mortality and morbidity is increasing fastest among all the cancers。

nm23-H1、p53、PCNA表达与大肠癌浸润转移的关系

目的：研究大肠癌中ｎｍ２３－Ｈ１、ｐ５３、ＰＣＮＡ的表达与浸润转移的关系。方法：应用ＬＳＡＢ免疫组织化学方法检测７４例大肠癌中ｎｍ２３－Ｈ１、ｐ５３、ＰＣＮＡ和Ⅳ型原的表达。结果：大肠癌中ｎｍ２３－Ｈ１、ｐ５３和ＰＣＮＡ的阳性率分别为７１．６％、５２．７％和８１．１％。大肠癌中ｎｍ２３－Ｈ１低表达与淋巴结转移有关（Ｐ＜０．０２５），ｎｍ２３－Ｈ１的表达在Ⅳ型胶原表达不同的肠癌中无明显差异（Ｐ＞０．０５）；ｐ５３和ＰＣＮＡ过表达与浸润程度和淋巴结转移有关（Ｐ＜０．０５），ｐ５３和ＰＣＮＡ的表达在Ⅳ型胶原表达不同的肠癌中有非常显著的差异（Ｐ＜０．００５）；大肠癌中ｐ５３过表达与ｎｍ２３－Ｈ１低表达有关（Ｐ＜０．０１）。结论：实验结果揭示ｐ５３基因突变对于ｎｍ２３－Ｈ１基因的失活有一定影响，其作用机制有待深入研究。ｎｍ２３－Ｈ１低表达可能仅在大肠癌转移过程中发挥作用，ｐ５３过表达可在大肠癌浸润转移过程及细胞增殖中起重要作用。

Survivin、MMP-2、nm23-H1、VEGF及其受体Flt-1在结直肠癌中的表达及临床意义

背景与目的:近年来的研究表明,多种生物学指标与结直肠癌发生、发展以及手术后的复发转移、预后有关。本研究旨在探讨人结直肠癌组织中Survivin、MMP-2、nm23-H1、VEGF及其受体Flt-1的表达与各临床病理参数及预后的关系及临床意义。方法:采用免疫组织化学SP法,检测72例结直肠癌组织及其对照癌旁正常黏膜组织中Survivin、MMP-2、nm23-H1、VEGF及其受体Flt-1表达的状况,分析其与临床病理参数及复发转移的关系。结果:在结直肠癌中Survivin、MMP-2、nm23-H1、VEGF及其受体Flt-1的表达率分别为62.5%(45/72)、66.7%(48/72)、55.5%(40/72)、61.1%(44/72)、79.2%(57/72),均显著高于对照癌旁正常黏膜组织(P<0.01)。Survivin表达与浸润深度、淋巴结转移、TNM分期及术后复发转移有关;MMP-2表达与淋巴结转移、TNM分期、术后复发转移有关;nm23-H1表达与淋巴结转移、TNM分期相关;VEGF表达与浸润深度、TNM分期及术后复发转移有关;而受体Flt-1表达与临床病理及预后因素均无关。结论:Survivin、MMP-2、nm23-H1、VEGF与结直肠癌的发生、发展密切相关,联合检测多个相关基因的表达能更准确地判断结直肠癌的生物学特征及预后判断。

nm23-H1基因逆转人高转移大细胞肺癌细胞L9981转移表型的分子机制

背景与目的:nm23-H1基因已被证明是转移抑制基因,转染野生型nm23-H1基因可以逆转肿瘤的恶性转移表型,但是nm23-H1基因抑制或逆转肺癌转移的分子机制却知之甚少,我们在建立转nm23-H1基因的人高转移大细胞肺癌细胞株L9981-nm23-H1的基础上,进一步探讨nm23-H1基因抑制肺癌转移的分子机制。方法:应用MTT法和改良的Boyden小室法分析转基因前后细胞的体外增殖能力及体外侵袭力的变化,体内实验分析转基因前后细胞在裸鼠体内的成瘤性及肺转移能力的改变,同时应用RT-PCR和Westernblot分别检测各组细胞中转移相关基因β-catenin、E-Cadherin、CD44S、CD44V6、MMP-2、TIMP-1、VEGF、基因mRNA及蛋白表达水平。结果:(1)转基因细胞株L9981-nm23-H1的体外增殖能力[(0%vs.(19.5±2.9)%]、克隆形成能力(10.3±0.7vs.21.7±1.3)及侵袭力显著低于L9981细胞(31.0±3.0vs.151.0±6.3)(P<0.01);(2)nm23-H1基因在裸鼠体内的抑瘤率显著增高(82.6%vs.0%),且转染nm23-H1基因的L9981细胞裸鼠体内移植瘤肺转移显著降低(0%vs.100%)(P<0.01);(3)nm23-H1基因能够上调β-catenin、E-Cadherin、TIMP-1基因mRNA及蛋白表达,下调VEGF、CD44V6和MMP-2基因mRNA及蛋白表达(P<0.01);(4)nm23-H1表达上调CD44S基因mRNA表达(P<0.01),而对其蛋白表达?

利用定点突变技术构建突变nm23-H_1和EGFP融合基因

背景与目的以前的研究已经证明nm23H1基因是肿瘤转移抑制基因,但其抑制肿瘤转移的分子机制目前还不完全清楚。基因定点突变技术可以精确地改变基因的特定碱基序列,获得突变蛋白质。本研究的目的是应用基因定点突变技术构建突变型nm23H1增强型绿色荧光蛋白(EGFP)融合基因,为进一步研究肿瘤抑制基因nm23H1的功能、生化作用机制提供理论基础和实验依据。方法以逆转录病毒PLXSN野生型nm23H1EGFP质粒为突变模板,应用QuikChangeTM定点突变方法,简单、快速、高效地引入nm23H1S44A、nm23H1P96S、nm23H1H118F、nm23H1S120G四个点突变和一个联合位点突变nm23H1P96SS120G,构建了突变型nm23H1EGFP融合基因。结果成功构建了nm23H1S44AEGFP、nm23H1P96SEGFP、nm23H1H118FEGFP、nm23H1S120GEGFP、nm23H1P96SS120GEGFP五个突变型nm23H1EGFP融合基因,经DNA序列分析突变的碱基序列与实验设计完全一致。结论成功构建了五个具有不同突变位点的突变型nm23H1EGFP融合基因。QuikChangeTM定点突变技术是一种简单、快速、高效的基因定点突变方法。

Nm23-H1/NDPK-A基因在大肠杆菌中的高效表达及产物纯化的研究

利用聚合酶链反应（ＰＣＲ）技术扩增人二磷酸核苷激酶Ａ亚基（ＮＤＰＫ－Ａ）基因，即ｎｍ２３－Ｈ１／ＮＤＰＫ－Ｋ基因的编码序列，经序列分析后，定向克隆于表达质粒载体ｐＢＶ２２０，在大肠杆菌ＤＨ５α中高效表达出重组人ＮＤＰＫ－Ａ．表达产物为可溶性的非融合蛋白，占菌体总蛋白４２％．斑点ＥＬＩＳＡ法鉴定表明表达产物与ＮＤＰＫ－Ａ标准抗血清呈阳性反应．以ＤＥＡＥ纤维素弱阴离子交换层析、ＣｉｂａｃｒｏｎＢｌｕｅ染料亲和层析结合高效液相排阻色谱技术纯化ｒＮＤＰＫ－Ａ，得纯度为９６．７％的目标蛋白．以反相高效液相色谱法进行酶活性分析，表明纯化的ｒＮＤＰＫ－Ａ能催化ＡＴＰ＋ＵＤＰ＝ＡＤＰ＋ＵＴＰ的反应，比活性为８００Ｕ／ｍｇ蛋白．

PTEN、nm23-H1和Syk在大肠癌中的表达及意义

目的检测PTEN、nm23-H1和Syk蛋白在大肠癌中的表达,探讨其与大肠癌发生、发展、浸润和转移的关系。方法采用免疫组化SP法检测60例大肠癌组织及30例正常大肠黏膜中PTEN、nm23-H1和Syk的表达,分析三者与大肠癌临床病理特征的关系。结果正常大肠黏膜中PTEN、nm23-H1和Syk的阳性表达率分别为90.0%(27/30)、93.3%(28/30)和96.7%(29/30),而在大肠癌组织中分别为36.7%(22/60)、41.7%(25/60)和31.7%(19/60),差异均有统计学意义(P<0.01)。大肠癌中3种蛋白的表达与年龄、性别、肿瘤大小和发生部位均无关(P>0.05),PTEN、Syk表达与大肠癌的浸润程度、淋巴结转移、分化程度及Duke's分期有关,nm23-H1表达与浸润程度、淋巴结转移及Duke's分期有关。大肠癌中3种蛋白表达两两呈正相关。结论 PTEN、nm23-H1和Syk表达与大肠癌发生、发展、浸润及转移密切相关,联合检测是判断大肠癌生物学行为的重要指标。

胃癌及区域淋巴结CD44v6、nm23-H1表达与其病理特征及预后关系的研究

目的:探讨胃癌及其区域淋巴结CD44V6、nm23-H1表达与胃癌病理特征及预后的关系。方法:本研究采用SP免疫组织化学方法对110例胃癌及613枚区域淋巴结组织中的CD44V6、nm23-H1的表达进行检测。结果:在胃癌原发灶和在淋巴结转移灶,CD44V6阳性表达率分别为65.5%和89.4%,nm23-H1阳性表达率分别为39.1%和16.8%。CD44V6、nm23-H1表达率与胃癌的组织学类型、浸润深度、淋巴结转移密切相关。胃癌原发灶CD44V6阳性表达组5年生存率显著低于阴性表达组(P<0.01);nm23-H1阳性表达组5年生存率显著高于阴性表达组(P<0.01)。结论:对胃癌组织进行CD44V6、nm23-H1蛋白的检测,有助于预测胃癌进程和淋巴结转移的诊断,以及评估胃癌患者的预后。

nm23-H1基因对口腔癌Acc-M细胞株的转移能力及化疗敏感性影响的体外研究

目的 通过 nm2 3- H1的转化及导入 Acc- M细胞株 ,建立稳定、高效、低毒的转染方法 ,观察 nm2 3- H1对 Acc- M细胞株侵袭转移能力及化疗敏感性的影响。方法 采用基因转化技术 ,制备高纯度的 nm2 3- H1真核表达质粒。用阳离子脂质体介导的转染技术 ,将 nm2 3- H1基因转染到口腔腺样囊性癌 Acc- M细胞株。用免疫组化技术检测转染前后的 nm2 3- H1的表达。并用 transwell小室和冲刷实验 ,观察转染前后细胞的侵袭、粘附、趋化运动能力的变化。采用 MTT法观察 nm 2 3- H1对 Acc- M化疗敏感性影响。结果 1使用重组的 p CMV - Neo- Bam的真核表达载体 ,将 nm 2 3- H 1转染口腔癌细胞 ,并获得稳定表达。 2 Acc- M细胞株 nm2 3- H 1基因的转染前后表达水平有明显差异。 3转染后的 Acc- M细胞侵袭、粘附、趋化运动能力均显著降低。 4转染前后使用 C- DDP的 L D50 分别为2 .6 4± 0 .4 7,1.85± 0 .4 1(P<0 .0 1)。结论 nm2 3- H1对 Acc- M细胞的侵袭转移能力具有显著抑制作用 。

nm23-H1 基因产物在人鼻咽癌中的表达及其临床意义

目的：ｎｍ２３是一种肿瘤转移抑制基因。它在某些人类肿瘤包括乳腺癌、结肠癌、胃癌、肝癌、膀胱癌等中的表达水平与肿瘤转移呈负相关。本研究检测ｎｍ２３－Ｈ１基因产物在鼻咽癌中的表达，探讨ｎｍ２３－Ｈ１基因的表达与鼻咽癌转移和预后的关系。方法：用ｎｍ２３－Ｈ１单克隆抗体通过免疫组化ＬＳＡＢ法，对９５例鼻咽低分化鳞癌蜡块标本进行研究，用Ｌｏｇｒａｎｋ检验分析ｎｍ２３－Ｈ１基因的表达与鼻咽癌转移、复发和预后的关系。Ｃｏｘ＇ｓ回归模型作多因素预后分析。结果：ｎｍ２３表达阴性组淋巴结转移率（８６．７％）比表达阳性组高（４８．６％，Ｐ＜０．０１），ｎｍ２３表达阴性组放疗后复发、远处转移较表达阳性组高（Ｐ＜０．０５），ｎｍ２３－Ｈ１基因产物的表达与鼻咽癌患者的预后呈正相关（Ｐ＜０．０１）。Ｃｏｘ＇ｓ回归模型多因素分析显示ｎｍ２３－Ｈ１是影响鼻咽癌预后的一个指标（Ｐ＜０．０５）。结论：本研究的结果提示ｎｍ２３－Ｈ１的阴性表达与鼻咽癌的淋巴结转移、复发、远处转移显著相关，ｎｍ２３－Ｈ１可作为预测鼻咽癌预后的一个重要指标。

nm23-H_1基因对人肺癌细胞中细胞外信号调节激酶活性的影响

目的 探讨肿瘤转移抑制基因nm2 3 H1 对人高转移大细胞肺癌细胞株L9981中细胞外信号调节激酶ERK1/2活性的影响。方法 应用特异性识别总ERK1/2 ( p44 /4 2MAPkinase)和双磷酸化ERK1/2( phospho p44 /4 2MAPkinase)的抗体及蛋白印迹法 (Westernblot) ,检测L9981(缺失nm2 3 H1 基因的原代肺癌细胞株 )、L9981 nm 2 3 H1 (转染了nm 2 3 H1 基因的L9981细胞株 )、L9981 PLXSN (转染了空载体的L9981细胞株 )中总ERK1/2和磷酸化ERK1/2的水平。磷酸化ERK 1/2活性应用非放射性免疫沉淀和Westernblot法以及 p44 /4 2MAPkinase分析试剂盒予以检测。 结果 L9981 nm2 3 H1 细胞株中磷酸化ERK 1/2的水平 ,以及ERK1/2活性均显著低于L9981细胞株和L9981 PLXSN细胞株 (P <0 .0 1) ,L9981和L9981 PLXSN细胞株间磷酸化ERK 1/2水平和ERK 1/2活性比较均无显著性差异 (P >0 .0 5 )。三个细胞株间总ERK1/2水平比较均无显著性差异 (P >0 .0 5 )。结论 nm2 3 H1 基因可明显靶向地抑制人高转移肺癌细胞株L9981中ERK 1/2的转录表达和ERK 1/2的活性。推测nm2 3 H1 基因的作用机制可能与其抑制了MAPK/ERK信号传导通路有关。

nm23-H1基因在大肠癌中的表达与肝转移及预后的关系

目的：探讨ｎｍ２３－Ｈ１蛋白表达与大肠癌肝转移及预后的关系。方法：对１０１例大肠癌存档石蜡块进行重新切片，采用ｎｍ２３－Ｈ１单克隆抗体进行免疫组化染色（ＬＳＡＢ法）。结果：ｎｍ２３－Ｈ１蛋白表达与年龄、性别、肿瘤大小、部位、组织类型、浆膜侵犯无关；与Ｄｕｋｅｓ分期、淋巴结转移有关；手术时有肝转移组较无肝转移组低，手术后有肝转移复发组较无肝转移复发组低（Ｐ＜００１）。Ｃｏｘ模型分析显示ｎｍ２３－Ｈ１是大肠癌预后的一个保护性指标。结论：ｎｍ２３－Ｈ１基因对大肠癌肝转移和预后具有重要作用。

nm23-H1表达预测大肠癌转移的价值研究

目的 大肠癌预后取决于是否存在肿瘤转移 ,目前尚无肯定的观测大肠癌细胞恶性潜能的生物学指标。本研究目的在于探讨nm2 3 H1作为预测大肠癌转移指标的潜在价值。方法 采用免疫组织化学链霉菌亲合物素蛋白—生物素酶标 (SP)方法对 5 8例存档大肠癌标本进行nm2 3 H1蛋白表达检测 ,用SSPS统计软件包对nm H1表达与临床病理参数的关系进行分析。结果 正常大肠粘膜和大肠腺瘤nm2 3呈阳性表达 ,6 2 1%大肠癌组织阳性表达。nm2 3表达与肿瘤分级、淋巴结及肝转移负相关 (P值分别为 0 0 10 0 ,0 2 0 87,0 0 0 376 )。nm2 3阳性表达的大肠癌患者预后好(P =0 0 0 0 2 )。结论 nm2 3