肿瘤转移抑制基因nm23-H1 mRNA在乳腺癌中的转录表达

目的探讨nm23-H1基因mRNA在乳腺癌组织中的表达及其与临床的关系.方法采用半定量RT-PCR方法,检测30例乳腺癌组织nm23-H1的表达.结果①淋巴结阳性的原发灶组织nm23-H1 mRNA表达明显低于淋巴结阴性的原发灶组织,Ⅲ期乳腺癌组织nm23-H1 mRNA水平较Ⅰ、Ⅱ期的明显低.②多因素分析发现淋巴结转移与nm23-H1mRNA的表达有显著性相关.结论 nm23-H1基因mRNA表达强度与淋巴结转移呈负相关.在乳腺癌转移过程中,nm23-H1 mRNA起重要的作用.     

环孢素A对人滋养细胞nm23-H1表达的调控作用

目的:探讨环孢素A（CsA）对人滋养细胞系Bewo的23号非转移性基因（nometastatic gene23）H1型即nm23-H1表达的调控作用，为治疗滋养细胞疾病提供新的依据。方法:将Bewo细胞分为对照组（加溶媒）、环孢素组加入终浓度由10-2 μmol/L-10 μmol/L环孢素A。分别于48 h后用RT-PCR检测nm23-H1基因mRNA表达水平，于72 h后用In cell Western分析nm23-H1蛋白表达水平。结果:与对照组相比，nm23-H1的表达水平随环孢素A浓度10-2 μmol/L-1 μmol/L呈现降低趋势，其中1.0 μmol/L环孢素A nm23-H1 mRNA和蛋白水平均明显降低（P＜0.05， P＜0.01）；当浓度升高至10 μmol/L时，nm23-H1则呈升高趋势。结论:低浓度环孢素A可通过降调节nm23-H1的表达，继而改善滋养细胞的侵袭力。     

nm23-H1基因在儿童急性淋巴细胞白血病的表达及其对化疗疗效的影响

目的探讨儿童急性淋巴细胞白血病（ALL）不同阶段、不同类型患者nm23-H1基因的表达水平及其对化疗疗效的影响。方法研究对象为2006.12～2008.05哈尔滨市儿童医院血液科、哈尔滨医科大学附属第一医院儿科住院的ALL患儿。应用半定量逆转录-聚合酶链反应（RT-PCR）的方法,检测儿童急性淋巴白血病初治患者、缓解患者、难治患者、复发患者及正常对照儿童nm23-H1基因的表达;观察nm23-H1基因与疗效的关系。结果（1）初治患者nm23-H1表达水平明显高于正常对照组（P〈0.01）和完全缓解组（P〈0.01）;完全缓解后nm23-H1表达水平与对照组无明显差异（P〉0.05）,复发/难治组患者nm23-H1表达水平高于正常对照组（P〈0.01）和完全缓解组（P〈0.01）,与初治患者无明显差异（P〉0.05）;（2）40例初治患者nm23-H1阳性26例,nm23-H1阴性14例,nm23-H1阳性患者的完全缓解（CR）率与nm23-H1阴性患者无明显差异（分别为73.1%、92.9%,P〉0.05）,但完全缓解患者治疗前nm23-H1表达水平低于未缓解患者（P〈0.01）。结论nm23-H1的表达水平随儿童ALL的病情发展而变化,nm23-H1可以作为判断疗效、预测复发、评估预后的一个因素;nm23-H1高表达可能是儿童ALL的不利因素,nm23-H1高表达者疗效差,易耐药,易复发,预后差。     

乳腺癌组织中uPA、uPAR及nm23-H1的表达

目的　观察乳腺癌组织中uPA、uPAR、nm2 3 H1的表达并探讨与腋窝淋巴结转移的关系。方法　用免疫组化EnVi sion两步法检测 6 9例乳腺癌组织中uPA、uPAR和nm2 3 H1表达的分布情况 ,观察其与肿瘤的分化程度以及与腋窝淋巴结转移的关系。结果　 (1)uPA阳性表达定位于癌细胞胞质 ;uPAR和nm2 3 H1阳性表达定位于癌细胞胞膜及胞质 ,多数癌旁乳腺上皮细胞呈nm2 3 H1阳性表达 ;高分化乳腺癌 (Ⅰ级 )uPA和uPAR表达阳性率 (30 0 %和 2 5 0 %)低于中低分化乳腺癌 (Ⅱ、Ⅲ级 ) (分别为 6 8 1%、72 7%和 70 0 %、74 1%) (P <0 0 5 ) ;nm2 3 H1表达阳性率在乳腺癌组织不同分化程度间差异无显著性 (P >0 0 5 ) ;(2 )腋窝淋巴结有转移者uPA和uPAR的表达阳性率 (73 2 %和 75 6 %)高于无淋巴结转移者 (35 7%和35 7%) (P <0 0 5 ) ;有腋窝淋巴结转移者nm2 3 H1的表达阳性率 (2 4 4 %)显著低于无淋巴结转移者 (5 0 0 %) (P <0 0 5 ) ;uPA、uPAR和nm2 3 H1的表达与淋巴结转移的个数均无关 ;(3)uPA阳性表达的癌组织其nm2 3 H1表达阳性率 (15 0 %)低于uPA阴性表达的癌组织 (6 2 1%) (P <0 0 5 )。结论　uPA和uPAR的高表达与乳腺癌腋窝淋巴结转移密切相关 ;uPA、uPAR和nm2 3 H1可以作为乳腺癌侵袭与淋巴结转移的     

子宫内膜异位症中nm23-H1基因表达的意义

目的：探讨nm23-H1基因在子宫内膜异位症发生中的作用。方法：采用免疫组织化学SP法检测25例子宫内膜异位症和22例正常子宫内膜组织中nm23-H1的蛋白表达情况；采用RT-PCR检测研究33例子宫内膜异位症的异位子宫内膜组织和30例正常子宫内膜组织中nm23-H1基因的mRNA表达情况。 结果：25例子宫内膜异位症组中，nm23-H1的蛋白表达缺失为3例、弱阳性12例、强阳性10例，对照组中nm23-H1的蛋白表达缺失为0例、弱阳性3例、强阳性19例，两组差异显著（P<0.01）。33例子宫内膜异位症组中nm23-H1 mRNA表达缺失为4例、弱表达15例、强表达14例，30例对照组中，nm23-H1的mRNA表达缺失为1例、弱表达6例、强表达23例，子宫内膜异位症组明显低于正常对照组（P<0.05）。 结论：nm23-H1在子宫内膜异位症的发病过程中可能起重要的作用，进一步明确nm23-H1基因在子宫内膜异位症发生中的作用及其作用机制，对了解子宫内膜异位症的发病机制、临床诊断和治疗可能有一定意义。     

nm23-H1基因在人肺癌细胞L9981恶性表型逆转中的作用

nm23-H1基因是肿瘤转移抑制基因,转染野生型的nm23-H1基因可以逆转肺癌的恶性表型,我们拟建立转染野生型nm23-H1基因的人大细胞肺癌细胞株L9981-nm23-H1,并初步探讨nm23-H1基因在逆转L9981细胞株恶性表型中的作用。应用基因克隆技术构建质粒载体pLXSN-nm23-H1-EGFP,并建立L9981-nm23-H1细胞株。同时应用Westernblot检测L9981-nm23-H1细胞中nm23-H1蛋白表达。细胞培养及改良的Boyden小室法分别检测L9981-nm23-H1细胞株的体外生物学行为,动物实验检测L9981-nm23-H1细胞株在裸鼠体内的成瘤性及肺部转移能力。结果成功构建了逆转录病毒载体pLXSN-nm23-H1-EGFP;并建立了人大细胞肺癌细胞株L9981-nm23-H1;nm23-H1基因在细胞株L9981-nm23-H1中稳定、高效表达;L9981-nm23-H1细胞体外增殖能力,克隆形成力,体外侵袭力显著降(P<0.01);L9981-nm23-H1裸鼠体内的成瘤性及肺部转移能力显著低于L9981和L9981-pLXSN(P<0.01);nm23-H1基因的抑瘤率82.56%。本研究资料提示转染野生型nm23-H1基因可以逆转人大细胞肺癌细胞株L9981的恶性表型。     

nm23-H1基因表达及突变与肝癌转移的关系

[摘要] 目的　研究nm23-H1基因的表达及突变和原发性肝细胞癌（hepatocellular carcinoma ,HCC）发展和转移的关系。方法 应用逆转录 PCR（RT-PCR）和逆转录PCR-单链构象多态法（RT-PCR SSCP）对30例肝癌组织、30例癌旁组织和4例正常肝组织中nm23-H1基因 mRNA表达和基因突变情况进行检测。 结果 nm23-H1基因在肝癌组织、癌旁组织、正常组织中的表达水平分别为1.62±0.41、1.30±0.30和1.23±0.39。肝癌组织中nm23-H1基因的表达水平明显高于癌旁组织（P<0.05）和正常组织（P<0.01）; 低分化肝癌组织中nm23-H1基因表达水平低于高、中分化肝癌组织中nm23-H1基因表达水平（P<0.05）;有卫星转移灶和无卫星灶的肝癌组织中nm23-H1基因表达水平无显著差异（P>0.05）;30例肝癌组织及相应的癌旁组织中未发现nm23-H1 cDNA基因突变。 结论 nm23-H1基因表达水平增高与肝癌的转移有密切关系,nm23-H1基因的异常表达是HCC转移中的频发事件而与基因突变无关。     

食管癌中Cath-D、nm23-H1蛋白的表达及其临床病理意义

目的：探讨组织蛋白酶Ｄ（Ｃａｔｈ－Ｄ）、肿瘤转移抑制基因表达蛋白（ｎｍ２３－Ｈ１）的表达与食管癌临床病理特点及预后的关系。方法：应用免疫组织化学Ｓ－Ｐ法，以兔抗Ｃａｔｈ－Ｄ、鼠抗ｎｍ２３－Ｈ１抗体标记６０例食管癌和５例正常的食管粘膜。观察不同分化程度和组织类型食管癌的表达情况，并比较其阳性率。结果：癌组织Ｃａｔｈ－Ｄ阳性３６例（６０．０％），ｎｍ２３－Ｈ１阳性３５例（５８．３％）。Ｃａｔｈ－Ｄ的表达与癌组织分化程度、浸润深度、淋巴结转移和预后均无关（Ｐ＞０．０５）；而ｎｍ２３－Ｈ１蛋白的表达则与癌组织分化程度及淋巴结转移有关（Ｐ＜０．０５，Ｐ＜０．０１），与癌组织浸润深度和预后无关（Ｐ＞０．０５）。结论：ｎｍ２３－Ｈ１可作为一种食管癌淋巴结转移的重要生物学标记物，但Ｃａｔｈ－Ｄ、ｎｍ２３－Ｈ１与预后的关系仍需进一步研究。     

卵巢癌患者癌组织中nm23-H1蛋白和N-cad的表达及意义

目的:探讨卵巢癌患者癌组织中nm23-H1、神经型钙粘附蛋白(N-cadherin,N-cad)表达及其临床意义.方法:选取我院2011年1月至2013年12月间收治的118例卵巢癌患者,根据卵巢癌病理分期分为I级(n=49)、Ⅱ级(n=40)、Ⅲ级(n=29),采用免疫组化法检测癌组织及癌旁组织中nm23-H1蛋白和...     

肝细胞癌nm23－H1蛋白表达的研究

应用免疫组化检测８８例肝细胞癌（ＨＣＣ）中ｎｍ２３－Ｈ１蛋白的表达。癌旁肝组织强阳性表达，５１例肝癌组织阳性表达（５８％）。阳性产物主要定位于肿瘤细胞胞浆。ｎｍ２３－Ｈ１蛋白表达与ＨＣＣ肿瘤体积，组织分型及Ｅｄｍｏｎｄｓｏｎ分级无关，而与肝内或肝外转移显著负相关。结果表明ｎｍ２３－Ｈ１在抑制ＨＣＣ肝内或肝外转移中起着重要作用，有可能成为评价ＨＣＣ病人预后的一项新指标。     

Semiquantitative immunoblot analysis of nm23-H1 and -H2 isoforms in adenocarcinomas of the lung: prognostic significance

Total amounts of nm23 protein and relative levels of H1 and H2 isoforms were studied in 27 fresh-frozen samples of pulmonary adenocarcinoma and adjacent non-neoplastic tissues that were obtained at surgery. Semiquantitative immunoblotting with a monoclonal antibody (Pan-242) against nm23 protein demonstrated both isoforms, recognized as 20.5 kDa for H1 and 18.5 kDa for H2, to be present in all cases. Both H1 and H2 levels in neoplastic tissues were higher than in the corresponding non-neoplastic samples. Expression of H2 was usually greater than of H1. The H2/H1 ratio varied from 1.9 to 14.1 (mean value 5.2) in non-neoplastic tissues and 1.0-5.9 (mean value 2.5) in neoplastic tissues, although this ratio did not correlate with any prognostic factor like tumor size, nodal status or distant metastasis (TNM tumor stage). H1 and H2 levels were significantly lower (mean values 4.3 and 2.4) in well-differentiated than in moderately and poorly differentiated adenocarcinomas (8.3 and 3.0) (P < 0.03 and P < 0.05, respectively). These data indicate that H1 and H2 isoform levels correlate with histological differentiation, but not the metastatic potential or stage of pulmonary adenocarcinoma.     

nm23-H1基因对人肺腺癌A549细胞增殖和侵袭的抑制作用

目的:研究转染nm23-H1基因对体外培养A549细胞增殖和侵袭的抑制作用及其机理。方法:构建nm23-H1基因的真核表达载体,转染到体外培养的人肺腺癌细胞A549中,通过G418筛选出稳定表达克隆,RT-PCR及免疫组化检测nm23-H1在细胞内的表达情况。绘制细胞生长曲线检测nm23-H1基因对细胞生长的影响,流式细胞仪检测细胞周期,原子力显微镜观察细胞膜表面伪足的超微结构。结果:转染后的肿瘤细胞能稳定表达nm23-H1基因,抑制了肿瘤细胞的增殖。nm23-H1基因没有诱导细胞凋亡但使G1期细胞增加而S期细胞减少,停滞于G0期。转染nm23-H1基因后细胞边缘的伪足减少。结论:nm23-H1基因能抑制体外培养的A549肿瘤细胞的增殖,可能通过改变细胞表面结构减弱细胞的侵袭能力。     

nm23-H1 protein immunoreactivity in intraepithelial neoplasia and invasive squamous cell carcinoma of the uterine cervix

Differences In the Immunohlstochemlcal expression of the 17 kDa protein encoded by the human nm23-H1 gene were studied In premallgnant lesions and Invasive squamous cell carcinoma (SCC) (N = 8) of the cervix using routine streptavldln-blotln Immunohistochemlstry and a polyclonal antibody to the nm23-H1 protein. The premalignant lesions were kollocytic atypla due to wart virus Infection (N = 5), low-grade cervical intraepithelial neoplasia (CIN) (N = 7) and high-grade CIN (N = 7). The carcinomas were either moderately (N = 3) or poorly differentiated (N = 5). The non-neoplastlc controls were normal squamous epithelium from cases with uterine prolapse (N = 7) and normal squamous epithelium not affected by the Infective or neoplastic areas of some of the cases with wart virus Infection (N = 2) and carcinoma (N = 2). Moderate to strong cytoplasmic and, occasionally, nuclear Immunostainlng for the nm23-H1 protein was seen in all cells above the basal layer of the normal squamous epithelium. However, most of the cervical SCC show a relative reduction in nm23-H1 immunoreactivity (7/8 cases; 88%). This difference In nm23-H1 expression was statistically significant (P = 0.0006; Chi-squared test with continuity correction). All of the cases with wart virus Infection (N = 5; 100%) displayed moderately strong nm23-H1 immunostaining throughout the squamous epithelium except for the basal layer where no staining was observed. The cases that had low-grade squamous dysplasia of the cervix (CIN Ml) (N = 7; 100%) also displayed moderate to strong nm23-H1 Immunoreactivity In the epithelium except for the basal layer (CIN I) or the lower two-thirds of the epithelium (CIN II). nm23-H1 Immunoreactivity was either absent or was significantly reduced in all of the high-grade CIN (CIN III) cases (At = 7; 100%) in which only the non-dysplastJc superficial third of the squamous epithelium displayed nm23-H1 immunolabeling. The difference in nm23-H1 expression between low-grade and high-grade CIN cases was statistically significant (P = 0.0013; Chi-squared test with continuity correction). Similarly, the difference between low-grade CIN and SCC cases in the expression of nm23-H1 was also significant (P = 0.0041; Chi-squared test with continuity correction). However, no statistically significant difference in nm23-H1 immunoreactivity was found between cases of high-grade CIN and SCC. In conclusion, nm23-H1 protein immunoreactivity is reduced in high-grade CIN and cervical SCC but not in low-grade CIN. These findings suggest that reduced expression of the protein may be Important early in the sequential development of cervical squamous neoplasia.     

Squamous cell lung carcinomas: the role of nm23-H1 gene

 This analysis of 32 pairs of human squamous cell lung carcinomas and normal matched control DNA demonstrates that loss of heterozygosity (LOH) is infrequent at the nm23-H1 locus, affecting only 2 of the 18 informative cases. Both LOH cases were in the tumor stage IIIA. One tumor was of poor and the other of moderate histological grade. These and an additional 34 tumor samples were also analyzed immunohistochemically for the presence of nm23-H1 protein. Of the 66 cases tested for the presence of nm23-H1 protein 54 were negative. Eight samples exhibited up to 35% positive cells (with weak immunostaining intensity) and four between 35% and 70% (moderate immunostaining intensity); no sample showed more than 70% positive cells. Noncancerous lung parts contained no nm23-H1 protein. nm23-H1 expression was independent of TNM stage, grade, tumor size, and patient’s survival. Two samples with LOH were negative for nm23-H1 protein. We therefore conclude that neither loss of heterozygosity of the nm23-H1 gene nor the intensity of specific protein expression are related to squamous cell lung carcinoma development and progression. Received: 27 January 1997 / Accepted: 9 May 1997     

Expression of the nm23 homologues nm23-H4, nm23-H6, and nm23-H7 in human gastric and colon cancer

Eight members of the nm23-gene family have been described. The involvement of nm23-H1 and nm23-H2 in tumour progression and metastasis, as well as in gene regulation and apoptosis, has been shown in numerous studies. Whether nm23-H4, -H6, and -H7 play a role in tumours is, however, largely unknown. This study describes data on the expression of these three nm23 homologues in human colon and gastric cancer by real-time RT-PCR and immunohistochemistry. Increased expression of these genes, most strikingly nm23-H4 and -H7, was observed in the majority of tumours analysed. No correlation with tumour stage according to the TNM classification was found. In contrast, by immunohistochemical analysis, nm23-H4 and -H6 overexpression correlated with the intestinal tumour type in gastric cancer tissues, whereas no increased immunoreactivity for the three nm23 proteins was noted in the diffuse type tumour specimens. These findings indicate that nm23-H6, and particularly nm23-H4 and -H7, may be involved in the development of colon and gastric carcinoma, the latter possibly in a type-specific manner. A contribution to tumour progression or metastasis could not, however, be proven. Elucidation of the specific mechanisms by which the nm23 homologues nm23-H4, -H6, and -H7 are involved in tumour development requires further studies.