外周血CK20 mRNA表达与结直肠癌临床病理和预后的关系

目的:探讨外周静脉血中CK20 mRNA表达及其与结直肠癌临床病理及预后的关系.方法:选取结直肠癌术前患者61例、健康志愿者20例和结直肠息肉患者10例,采用RT-PCR法检测其外周静脉血中CK20 mRNA的表达,并结合其临床病理特点和随访资料进行综合分析.结果:61例结直肠癌患者术前外周血CK20 mRNA阳性率为41.0%(25/61);其表达与肿瘤TNM分期、浸润深度、远处转移和区域淋巴结转移有关(P<0.05).20例健康志愿者和10例结直肠息肉患者外周血均无CK20 mRNA表达.在61例结直肠癌患者中,术后46mo完整随访的有37例,其中有17例死亡,有10例外周血CK20 mRNA表达阳性.结论:外周静脉血中CK20 mRNA的表达与结直肠癌患者的肿瘤分期和浸润转移有关.血液中CK20是反映结直肠癌患者发生肿瘤微转移较为特异的肿瘤标志物,外周血液中CK20 mRNA的表达可作为评估患者预后的指标.     

大肠癌患者外周血人类斯钙素基因的检及其意义

目的探讨靶基因人类斯钙素(hSTC-1)在大肠癌患者外周血中的表达以及与肿瘤恶性程度的关系.方法采用RT-PCR方法检测15例健康成人、5例妊娠期妇女、14例消化道炎症疾病患者、57例大肠癌患者外周血的hSTC-1 mRNA.结果57例大肠癌患者外周血中hSTC-1 mRNA的阳性率为49.12%(28/57),并与大肠癌的临床分期有显著相关性(P＜0.05).而健康成人、妊娠期妇女、消化道炎症疾病患者外周血则无一例出现阳性.结论应用RT-PCR方法检测大肠癌患者外周血中的hSTC-1 mRNA具有高度敏感性和特异性,它有望成为判断大肠癌生物学行为恶性程度、转移和复发以及疗效观察的客观指标.     

肺癌患者外周血癌胚抗原、细胞角蛋白19mRNA表达水平与肿瘤分期、近期疗效及预后的关系

目的探讨肺癌患者治疗前后外周血癌胚抗原（CEA）、细胞角蛋白19（CK19）mRNA的表达水平及其与肿瘤分期、近期疗效、预后的关系。方法应用TaqMan定量逆转录-聚合酶链反应（RT-PCR）检测78例肺癌患者（鳞癌28例、腺癌40例、小细胞肺癌9例、大细胞肺癌1例）治疗前后、30例肺部良性疾病患者及30名健康对照者外周血癌胚抗原（CEA）、细胞角蛋白19（CK19）mRNA的水平；同时采用酶联免疫吸附法测定肺癌患者治疗前血清CEA和细胞角蛋白19片段（CYFRA21-1）水平。患者随访2年。结果肺癌患者外周血CEA、CK19mRNA阳性率分别为69．2％（54／78）、62．8％（49／78），显著高于肺部良性疾病患者及健康对照者，三者差异有统计学意义（χ^2值分别为37．65、41．54；27．41、30．84，P均〈0．01）。鳞癌组CK19mRNA阳性率最高，腺癌组CEAmRNA阳性率最高。不同分期肿瘤患者间CEA、CK19mRNA阳性率差异无统计学意义（χ^2值分别为3．63、3．81，P〉0．05）。肺癌患者外周血CEA、CK19mRNA的阳性率显著高于CEA、CYFRA21-1蛋白水平；手术后CEA、CK19mRNA阳性率显著下降；化疗后阳性率下降不明显。化疗前CEAmRNA阳性患者的中位生存期明显低于阴性患者（分别为8．5、11．7个月），化疗前CK19mRNA阳性患者的中位生存期明显低于阴性患者（分别为8．9、12．3个月）；术前CEAmRNA阳性患者肿瘤复发或转移率（29．4％）高于术前阴性患者（7．7％），术前CK19mRNA阳性患者肿瘤复发或转移率（18．8％）高于术前阴性患者（7．1％）。结论检测肿瘤患者外周血CEA、CK19mRNA水平对于预测肿瘤细胞微转移有一定的临床意义，有助于评估手术疗效及预测预后。CEA、CK19mRNA表达水平与肿瘤分期无关。CEA、CK19基因检测的敏感性优于蛋白水平的检测，有助于肺癌的辅助诊断。     

乳腺癌外周血细胞角蛋白19 mRNA的检测及临床价值

目的应用荧光定量RT-PCR检测乳腺癌外周血中的表达情况,并评价其表达的临床意义。方法用荧光定量RT-PCR方法检测49例乳腺癌患者外周血CK19mRNA表达。结果49例乳腺癌患者外周血中CK19mRNA检测阳性28例,阳性率57.1%,统计结果显示乳腺癌患者外周血CK19mRNA的表达阳性率在患者不同年龄、病理类别、临床分期、ER、PR状态的各组差异无显著性(P>0.05),在淋巴结转移状态间有显著差异。结论CK19mRNA可作为RT-PCR法检测乳腺癌患者外周血微转移的分子标志物,有助于早期预测乳腺癌发生血道微转移,指导临床治疗。     

CK20 mRNA在胃癌病人外周血中的表达及意义

目的探讨胃癌病人外周血中CK20 mRNA的：表达及临床意义。方法采用巢式RT-PCR技术检测70例胃癌病人手术前、后外周血CK20 mRNA的表达情况，并以20例健康志愿者为阴性对照，以胃腺癌细胞株BGC-823作阳性对照。结果CK20 mRNA术前阳性表达率为32．9％，阳性表达率与组织学类型具有相关性（P〈0．01），而与TNM分期、肿瘤的部位、病人性别无明显相关性（P〉0．05）。术后CK20 mRNA阳性表达率明显高干术前（P〈0．05）；20例健康志愿者无一例阳性表达，胃腺癌细胞株BCK-823均为阳性表达。结论CK20 mRNA作为标志物用于检测胃癌的血循环微转移是可靠的；手术操作可促使肿瘤细胞释放入血。     

Clinical significance of preoperative and postoperative cytokeratin 19 messenger RNA level in peripheral blood of esophageal cancer patients

The purpose of this study is to analyze the correlation between preoperative/postoperative Cytokeratin 19 (CK19) messenger RNA (mRNA) level in peripheral blood (PB) and the clinical significance in esophageal cancer patients with different clinicopathological factors. We detected the preoperative and postoperative CK19 mRNA level in the PB of 139 esophageal cancer patients who underwent complete resection and evaluated its clinical significance. We found that both the preoperative and postoperative CK19 mRNA level increased in the esophageal cancer patients with lymph node metastasis, relapse or distant metastasis compared with that in cancers without lymph node metastasis, relapse or distant metastasis. High postoperative CK19 mRNA levels indicate a short disease‐free survival (DFS) for the whole cohort esophageal cancer patients, whereas the high preoperative CK19 mRNA levels only indicate a short DFS for the esophageal cancer patients with squamous cell carcinoma, TNM III stage, and lymph node metastasis. The dynamic change of CK19 mRNA levels could indicate the prognosis of esophageal cancer patients. The patients with decreasing CK19 mRNA level after surgery had good prognosis, and the patients with changeless CK19 mRNA level had poor prognosis. Taken together, CK19 mRNA levels could be a promising marker in assessing prognosis or assigning treatment for the esophageal cancer patients according to different clinicopathological factors.     

胃癌患者外周血CK20mRNA的表达及临床意义

采集55例胃癌、46例良性胃病及正常献血员50例，应用逆转录多聚酶链反应（RT－PCR）技术研究外周血CK20mRNA的表达。结果：46例良性胃病及正常献血员50例外周血CK20mRNA均呈阴性，55例胃癌中有35例外周血CK20mRNA表达阳性，I、Ⅱ期20例中有7例外周血CK20mRNA表达阳性，表达率低于Ⅲ、Ⅳ期（28／35）；低、未分化腺癌38例中，30例外周血CK20mRNA表达阳性，高于高、中分化腺癌（5／17）。认为PT－PCR检测外周血CK20mRNA敏感性和特异性较高，可作为胃癌患者术前评估的指标之一。     

肝癌患者周围血白蛋白mRNA检测

目的肝细胞性肝癌（ＨＣＣ）预后差，唯有在ＨＣＣ转移前行手术切除才为其最佳的治疗选择，而用形态学方法找血中极其微量的ＨＣＣ细胞是非常困难的。为了更好确定周围血中ＨＣＣ细胞。方法采用逆转录－聚合酶链反应（ＲＴ－ＰＣＲ）方法检测了２１例ＨＣＣ患者和２２例对照者的周围血白蛋白ｍＲＮＡ。结果发现晚期ＨＣＣ患者阳性率高，且与临床分期有关，有肺或门静脉累及者的阳性率较无肝外转移者高（Ｐ＝０．００３２）；血清甲胎蛋白（ＡＦＰ）＜２００μｇ／Ｌ和＞２００μｇ／Ｌ的ＨＣＣ患者阳性率之间差异无显著性（Ｐ＞０．０５）。结论该方法对ＨＣＣ早期微小转移有预示的可能，对ＨＣＣ患者预后的评估方面起一定的作用，尤其对血清ＡＦＰ阴性或低值的ＨＣＣ患者能起到补充诊断。     

Down-regulation of HLA-A mRNA in peripheral blood mononuclear cell of colorectal cancer

Purpose  

It has been demonstrated that the alteration of human leukocyte antigen (HLA) class I expression frequently occurs in colorectal tumor. Previous studies mainly focused on the expression of HLA-A in tumor cells. The expression of HLA-A in peripheral blood mononuclear cells (PBMC) was unknown. To develop a non-invasive diagnostic method for colorectal cancer (CRC), this work investigated the expression of HLA-A mRNA in PBMC in patients with CRC.     

细胞角蛋白20检测在大肠癌微转移中的临床意义

近年来随着微转移在肿瘤研究领域中的广泛开展,人们开始研究大肠癌微转移,以期获得更准确,更早期的转移信息,为临床分期及预后判断、辅助治疗提供更多的依据．随着分子生物学、分子免疫学的迅速发展．使大肠癌的淋巴结、血液、骨髓及各脏器等用常规组织学难以诊断的癌细胞微转移灶的检测成为可能．细胞角蛋白20(cytokeratin-20,CK20)是新近发现的一种多肽,局限在胃肠上皮细胞,具有严格的组织特异性,几乎所有大肠癌都明显表达,优于其他标志物,尤其实用于检测大肠癌微转移．通过检测大肠癌患者淋巴结、血液、骨髓中CK20 mRNA的表达来诊断微转移,对指导临床大肠癌的分期、判断预后复发、指导治疗显示出较高的临床应用价值．微转移是一项独立的预后指标．其价值优于 Dukes分期和肿瘤分级．现综述细胞角蛋白20 检测在大肠癌微转移中的临床应用及意义研究进展．     

T-regulatory lymphocytes in peripheral blood of gastric and colorectal cancer patients

AIM: To assess the absolute number of T-regulatory cells (Tregs; CD4+CD25+Foxp3+) in the peripheral blood of gastric and colorectal cancer patients. METHODS: We enrolled 70 cancer patients (33 gastric cancer, 37 colorectal cancer) and 17 healthy volunteers. The CD3+CD4+ lymphocytes and CD4+CD25+Foxp3+ Tregs in the peripheral blood were analyzed with flow cytometry. The absolute numbers of Tregs were calculated based on the CD4+CD25+Foxp3+ cells percent-age of CD3+CD4+ cells and the absolute numbers of CD3+C...     

Lunx mRNA在非小细胞肺癌外周血中的表达

目的 探讨Lunx mRNA在非小细胞肺癌(NSCLC)患者外周血中的表达及其临床意义.方法 应用逆转录聚合酶链反应(RT-PCR)技术检测80例NSCLC患者治疗前外周血中Lunx mRNA的表达,并以10例肺部良性疾病患者和10例健康志愿者外周血作为对照.结果 NSCLC外周血Lunx mRNA阳性表达率为58.75%,而对照组均无表达.Lunx mRNA表达率与NSCLC组织学分级、临床分期有相关性,而与病理类型、行为状态评分无相关性.结论 Lunx mRNA可作为检测NSCLC外周血循环癌细胞的良好分子标志物,其阳性表达与组织学分化差、临床分期较晚密切相关.     

Mismatch repair protein MSH2, cytokeratin 18 and cytokeratin 20 expression: clinicopathological correlation and prognostic value in colorectal cancer patients

BACKGROUND/AIMS: The survival of patients with colorectal cancer has not varied appreciably in recent years. The knowledge that genetic factors and disruption in apoptosis could play a role in the etiology and prognosis of patients with sporadic colorectal cancer has opened up new lines of research. We have studied a group of patients with colorectal cancer and the possible influence on the prognosis of immunohistochemical MSH2, M30 cytodeath and cytokeratin 20 expression. METHODOLOGY: Forty-nine consecutive patients with unselected colorectal cancer treated by resection and with a minimum follow-up period of 5 years. Tumor specimens were evaluated by an inmunohistochemical method for MSH2, cytokeratin 18 (M30 cytodeath) and cytokeratin 20 expression and correlated with epidemiological, clinicopathological and survival data. RESULTS: Thirty-four patients were resected with curative intention. At the end of the follow-up period, 25 (51%) had died, the majority (21) in relation to tumor progression, the overall median survival period being 47.9 months (95% CI = 27-86.6). Only vascular invasion, (lower median values), (p = 0.04) was related to MSH2 expression and tumor stage (p = 0.02) with cytokeratin 20. Patients' survival was related to tumoral stage (p = 0.04) and vascular invasion (p = 0.002). MSH2 expression, apoptosis (M30 cytodeath) and cytokeratin 20 staining did not influence the prognosis of patients. CONCLUSIONS: A change in the percentage of tumoral staining cells for MSH2, M30 cytodeath and cytokeratin 20 is frequent in patients with colorectal cancer. Only vascular invasion was correlated with MSH2 expression and stage of disease with cytokeratyn 20. Survival was related to TNM stage and vascular invasion, but not to MSH2, M30 cytodeath or cytokeratin 20 expressions.     

实时荧光定量RT-PCR检测结直肠癌中外周血端粒酶逆转录酶mRNA的表达及其临床意义

目的:建立外周血端粒酶逆转录酶(hTERT)mRNA表达量检测的实时荧光定量逆转录聚合酶链反应(RT-PCR)系统,检测结直肠癌患者hTERT mRNA的表达并探讨其对结直肠癌微转移的诊断价值.方法:用实时荧光定量RT-PCR技术检测53例结直肠癌患者和21名健康人的外周血标本hTERT mRNA表达情况,分析其表达与肿瘤临床病理特征的关系并应用接受者操作特征曲线(ROC曲线)分析hTERT mRNA检测对结直肠癌的诊断价值.结果:结直肠癌组外周血hTERT mRNA表达水平显著高于正常对照组(t1=7.953,P＜0.05).其表达与肿瘤淋巴结转移、血行转移和TNM分期相关(t'/t=2.334,2.149,2.460,均P＜0.05)hTERT mRNA诊断结直肠癌的ROC曲线下面积0.91,诊断界值为Ct≤32.结论:应用实时荧光定量RT-PCR技术克服了传统PCR只能定性检测而不能定量检测的缺-点:外周血hTERT mRNA可作为诊断结直肠癌微转移的标记物.     

外周血T淋巴瘤侵袭转移诱导因子1mRNA定量检测与结直肠癌肝转移的关系及其预测价值

[目的]定量检测外周血T淋巴瘤侵袭转移诱导因子1(T lymphoma invasion and metastasis inducing factor 1,Tiaml)mRNA表达量,探讨其与结直肠癌(colorectal cancer,CRC)异时性肝转移的关系及其预测价值。[方法]应用实时荧光定量RT-PCR检测166例CRC患者根治术前及术后外周血Tiaml mRNA表达量变化,随访术后预后3年,分析外周血Tiaml mRNA表达量与CRC异时性肝转移的关系及其预测价值。[结果]异时性肝转移患者术前及术后6个月时外周血Tiaml mRNA表达量均分别显著高于同期无异时性肝转移患者[(7.85±4.86)2~(-ΔΔCt)∶(4.45±2.75)2~(-ΔΔCt),(2.17±1.45)2~(-ΔΔCt)∶(1.10±0.93)2~(-ΔΔCt),P0.01];与术后6个月时比较,异时性肝转移患者确诊时外周血Tiaml mRNA表达量显著升高。CRC组术前外周血Tiaml mRNA表达量与肿瘤分化程度、浸润深度、有无淋巴结转移均呈正相关(P0.01),与术后生存期负相关(P0.01);单因素分析显示术前和术后6个月时外周血Tiaml mRNA表达量均与CRC异时性肝转移相关,Cox多因素分析显示两者是异时性CRC肝转移的独立危险因素(EXP=4.382、9.170)。[结论]术前外周血Tiaml表达量与CRC重要临床病理特征密切相关;术前、术后6个月时外周血Tiaml mRNA高表达与CRC异时性肝转移密切相关,对其具有一定预测价值。     

大肠癌患者外周血循环癌细胞检测的临床意义

目的探讨大肠癌外周血循环癌细胞检测的临床意义.方法以CK-20 mRNA为靶分子,RT-PCR技术检测3种癌细胞株(结肠腺癌细胞株SW-480、胃癌细胞株SGC-7901、食管癌细胞株TE-11)和67例大肠癌患者外周血细胞CK-20 mRNA的表达.结果三种癌细胞株中,只有结肠癌细胞表达CK-20 mRNA.RT-PCR技术能检出107个单核细胞中的一个肿瘤细胞;67例患者中,35例外周血CK-20 mRNA阳性,阳性率与大肠癌Dukse'分期明显相关:Dukes'A期25%,B期38.46%,C期55.17%,D期70.59%.53例手术治疗患者中,术前25例CK-20 mRNA阳性,术后30例阳性.25例术后早期短程化疗患者,化疗前阳性6例,化疗后仅2例阳性.结论大肠癌循环癌细胞(CK-20 mRNA)的检测可能成为判断大肠癌恶性程度、转移和复发以及疗效监测的客观指标.