转移性结直肠癌患者化疗后血清癌胚抗原水平的变化

目的:观察转移性结直肠癌病人化疗前后血清癌胚抗原(CEA)水平的变化及临床意义。方法:对施行过化疗的转移性结直肠癌病人进行回顾性研究,采用CEA试剂盒以微粒子化学发光免疫分析法测定血清CEA水平,研究CEA的变化及其与一些临床特征之间的关系。结果:67例转移性结直肠癌患者中19例(28.4%)化疗开始后70天内血清CEA有所升高,71天～210天期间再复查时,其CEA水平又降至化疗前水平或更低。影像学检查提示这19例CEA短暂升高的病人均从化疗之中得到益处(11例PR,8例SD)。没有证据支持CEA短暂升高与肿瘤原发部位、肿瘤转移、肿瘤分化之间有明确的关联。结论:某些转移性结直肠癌病人化疗开始后的血清CEA水平可以有一短暂的升高,可能与临床受益有关,尚不能作为肿瘤进展的指征。     

血清多种肿瘤标志物联合检测对结直肠癌的诊断价值

目的：探讨血清多种肿瘤标志物联合检测对结直肠癌的诊断价值。方法选择82例结直肠癌患者作为结直肠癌组,70例结直肠良性病变患者作为良性病变组,以及70例同期于我院进行健康体检的患者作为对照组。采用电化学发光免疫分析法对3组血清样本进行CEA、CA199、CA125、CA242及CA50等肿瘤标志物检测。结果结直肠癌组各项肿瘤标志物表达水平显著高于良性病变组及对照组,差异具有统计学意义（P＜0．05）。随着结直肠癌分期的进展及淋巴结转移,各项肿瘤标志物表达水平也逐渐升高,差异具有统计学意义（ P＜0．05）。此外,采用5种肿瘤标志物联合检测与肿瘤标志物单项检测比较,具有更高的敏感度及准确性（ P＜0．05）。结论血清多种肿瘤标志物联合检测对于结直肠疾病的鉴别诊断以及结直肠癌TNM分期判断都具有积极的意义,可作为结直肠癌早期诊断的重要辅助手段。     

肿瘤标志物联合25羟基维生素D诊断结直肠癌的价值

目的:研究肿瘤标志物联合25羟基维生素D［25(OH)D］诊断结直肠癌的价值。方法:选取2017年9月至2018年2月在我院就诊的结直肠癌患者73例作为结直肠癌组,随机选取同期在我院健康体检的70例作为对照组,对比两组血清CEA、CA125、CA19-9和25(OH)D水平,分析结直肠癌患者病理特征与血清25(OH)D水平的关系;计算肿瘤标志物、25(OH)D单独或联合检测诊断结直肠癌的灵敏度、特异度和准确度;探讨血清25(OH)D水平与肿瘤标志物间的关系。结果:结直肠癌组的血清CEA、CA125、CA19-9水平显著高于对照组（P＜0.05）,25(OH)D水平显著低于对照组（P＜0.05）。不同性别、年龄、发病部位、细胞分化、临床分期、淋巴结转移结直肠癌患者的血清25(OH)D水平差异有统计学意义（P＜0.05）。血清25(OH)D检测对结直肠癌诊断的临界值为14.26 nmol/L,灵敏度为53.80%,特异度为66.72%,曲线下面积（AUC）为0.666（0.625～0.705）。血清肿瘤标志物联合25(OH)D检测的诊断灵敏度、特异度和准确度最大,分别为78.51%、83.83%、86.25%。血清25(OH)D高水平组CEA、CA125和CA19-9水平显著低于低水平组（P＜0.05）。结论:肿瘤标志物联合25(OH)D检测对于结直肠癌诊断具有重要意义。     

血清肿瘤标志物CEA、CA19-9对结直肠癌的诊断价值

目的 分析血清肿瘤标志物CEA、CA19-9单项或联合检测对结直肠癌患者的临床诊断价值,探讨其在病理分期、淋巴结转移等临床特征方面的意义.方法 酶联免疫法检测160例健康人和158例结直肠癌患者术前两天以及术后两周血清中CEA、CA19-9含量.结果 结直肠癌患者2种血清肿瘤标志物含量明显高于健康人(P<0.01),术前与术后2种血清肿瘤标志物水平比较差异有统计学意义(P<0.05).CEA、CA19-9联合检测敏感度和特异度明显高于各单项检测值.在Dukes A、B、C及D期中,2种肿瘤标志物含量及检测阳性率依次增高,淋巴结转移患者的CA19-9含量高于无淋巴结转移患者(P<0.05).结论 肿瘤标志物CEA、CA19-9联合检测可以提高结直肠癌诊断的敏感度和特异度,并对临床分期、判断淋巴结转移、预测预后及监测复发有一定的指导意义.     

肿瘤标志物与结直肠癌术后XELOX辅助化疗疗效的相关性分析

目的探讨肿瘤标志物(CEA、VEGF、IGFBP-3、TGF-β1、TIMP-1、miR-21、miR-126、miR-143、miR-148a、miR-192)在结直肠癌XELOX辅助化疗前后的表达变化及与化疗疗效的相关性。方法收集50例健康志愿者,54例结直肠癌患者不同时期(术前、术后化疗前及化疗后)血清样本,运用酶联免疫吸附实验及实时荧光定量PCR法检测样本中上述肿瘤标志物的表达,并分析其与化疗疗效的相关性。结果 XELOX辅助化疗后患者血清中CEA、VEGF、IGFBP-3、TGF-β1、TIMP-1蛋白整体水平显著低于手术前(P0.05),Ⅱ及Ⅲ期患者化疗后CEA、VEGF、IGFBP-3、TGF-β1、TIMP-1蛋白水平显著低于化疗前(P0.05),Ⅳ期患者化疗后仅CEA、TGF-β1、TIMP-1水平显著下降(P0.05);实时荧光定量PCR结果表明:CEA、IGFBP-3、miR-21及miR-126化疗后水平显著低于术前(P0.05),而与化疗前相比,Ⅱ期患者化疗后CEA、IGFBP-3、miR-21及miR-126显著降低(P0.05),miR-143显著性增高(P0.05),Ⅲ期患者化疗后仅CEA、miR-21及miR-126水平显著性降低(P0.05),其余分子无显著性变化,Ⅳ期患者化疗后与化疗前相比,上述肿瘤标志物分子皆无变化。CEA无论在蛋白水平还是mRNA水平的表达变化与疗效都具有正相关性(mRNA水平Ⅳ期患者除外),IGFBP-3与TGF-β1在蛋白水平的变化与Ⅱ期患者化疗疗效呈正相关,TGF-β1与Ⅲ期患者化疗疗效呈正相关;在mRNA水平,miR-21和miR-126的变化与Ⅱ及Ⅲ期患者化疗疗效呈正相关,其余分子表达变化与疗效无相关性。结论肿瘤标志物的表达变化与结直肠癌不同分期XELOX辅助化疗疗效具有相关性。     

血清癌胚抗原水平变化在转移性结直肠癌化疗中的意义

目的 评价转移性结直肠癌患者化疗中血清癌胚抗原(CEA)水平的变化与化疗疗效的关系.方法 对伴有血清CEA水平升高的145例晚期结直肠癌患者的临床资料进行回顾性分析,比较不同血清CEA变化组疗效的差异.结果 一线化疗后44例(30.3%)患者血清CEA水平降低,继续原方案疾病控制41例(92.2%),中位无进展生存时间(PFS)9个月.15例(10.3%)患者血清CEA水平稳定,继续原方案化疗疾病控制12例(80%),中位PFS 8.0个月.86例(59.3%)患者血清CEA水平升高,其中50例患者继续原方案化疗,获益患者为12例(24%),中位PFS 4.5个月;另36例改为二线方案化疗,疾病控制14例(38.9%),中位PFS 6.0个月.结论 在不适合用影像学指标进行疗效评价的晚期结直肠癌化疗过程中,CEA水平的变化作为化疗疗效的评价指标有一定的实用性.     

血清癌胚抗原水平变化在转移性结直肠癌化疗中的意义

目的 评价转移性结直肠癌患者化疗中血清癌胚抗原(CEA)水平的变化与化疗疗效的关系.方法 对伴有血清CEA水平升高的145例晚期结直肠癌患者的临床资料进行回顾性分析,比较不同血清CEA变化组疗效的差异.结果 一线化疗后44例(30.3%)患者血清CEA水平降低,继续原方案疾病控制41例(92.2%),中位无进展生存时间(PFS)9个月.15例(10.3%)患者血清CEA水平稳定,继续原方案化疗疾病控制12例(80%),中位PFS 8.0个月.86例(59.3%)患者血清CEA水平升高,其中50例患者继续原方案化疗,获益患者为12例(24%),中位PFS 4.5个月;另36例改为二线方案化疗,疾病控制14例(38.9%),中位PFS 6.0个月.结论 在不适合用影像学指标进行疗效评价的晚期结直肠癌化疗过程中,CEA水平的变化作为化疗疗效的评价指标有一定的实用性.     

晚期结直肠癌患者化疗后血清CEA、CA199水平一过性升高的临床意义

背景与目的：晚期结直肠癌患者化疗后血清CEA和（或）CA19—9水平增高,常提示肿瘤进展。然而国外有文献报道部分化疗有效的晚期结直肠癌患者可出现血清CEA水平一过性增高。本研究主要通过分析晚期结直肠癌患者姑息性化疗前后血清CEA和CA19—9水平的动态变化,探讨我国晚期结直肠癌患者血清CEA水平和（或）CA19—9水平一过性增高的发生率及与临床预后的关系。方法：收集中山大学肿瘤防治中心收治的121例晚期结直肠癌患者的临床资料,所有患者经病理学证实,PS评分（ECOG）≤2分,接受含奥沙利铂和（或）伊立替康方案化疗,化疗前后进行血清CEA和CA19-9水平的动态测定。结果：121例患者中有14例发生了CEA“一过性增高”,发生率为11．6％（14／121）。CEA“一过性增高”患者基线CEA的中位水平为45ng／mL（9．67～2208μg／L）,中位峰值水平为80．1μg／L（13．38～4044μg／L）。从化疗开始至出现CEA“一过性增高”的中位时间为4周（2-6周）,中位持续时间为6．5周（4～14周）。14例患者中有11例接受含奥沙利铂方案的化疗：3例患者接受含伊立替康方案的化疗。14例患者中近期疗效评价部分缓解7例,病情稳定7例。5例（3．8％）患者化疗后发生了血清CA19—9水平“一过性增高”,但与临床疔效无关。结论：我国晚期结直肠癌患者接受含奥沙利铂方案或含伊立替康方案化疗时存在着CEA“一过性增高”现象,“一过性增高”并非提示肿瘤进展．而与较好的化疗疗效有关。化疗后血清CA19—9水平“一过性增高”与近期疗效无关。     

TPS、CA199和CEA在结直肠癌患者血清中的表达及其临床意义

[目的]研究结直肠癌患者血清中组织多肽特异性抗原（TPS）、CA199和CEA水平及结直肠癌患者根治术前后两者水平的变化,为结直肠癌的临床诊断、预后提供参考。[方法]用ELISA法检测血清TPS水平：用ECL法检测血清CA199和CEA水平。[结果]结直肠癌患者的血清TPS、CA199和CEA水平与结直肠良性疾病和正常人比较有显著性差异（P〈0.001），且随TNM分期增加而升高。手术治疗后三种肿瘤标志物水平明显下降,而术后复发患者的水平则明显升高。各种组合检测中，以TPS＋CA199＋CEA组合的敏感性和约登指数最高。[结论]血清TPS、CA199和CEA均可作为结直肠癌诊断、预后的临床指标,三者联合检测可提高结直肠癌的临床应用价值。     

联合检测凝血4项和肿瘤标志物在结直肠癌中的临床意义和诊断价值

目的:探讨联合检测凝血4项和肿瘤标志物在结直肠癌中的临床意义和诊断价值。方法:检测84例结直肠癌患者和80例结直肠良性疾病患者外周血中纤维蛋白原(FIB)、糖类抗原19-9(CA19-9)、癌胚抗原（CEA）水平;应用ROC曲线分析各指标的诊断价值。结果:结直肠癌患者术前FIB、CA19-9、CEA水平均明显高于结直肠良性疾病患者,差异有统计学意义(P＜0.05);Ⅲ-Ⅳ期结直肠癌患者FIB、CA19-9、CEA水平均明显高于Ⅰ-Ⅱ期患者,差异有统计学意义(P＜0.05);结直肠癌患者FIB水平和CEA、CA19-9水平存在着相关性。联合检测FIB、CA19-9、CEA水平可提高结直肠癌的诊断率。结论:术前肿瘤标志物及凝血4项的检测有助于鉴别结直肠良性、恶性肿瘤及监测血栓的形成,提高诊断效能,有利于早期发现与治疗。     

CapeOX和SOX化疗方案治疗晚期结直肠癌的疗效观察

目的 探讨奥沙利铂+卡培他滨(CapeOX方案)和奥沙利铂+替吉奥(SOX方案)化疗治疗晚期结直肠癌的临床疗效.方法 选取2015年1月至2017年1月间大连大学附属新华医院收治的100例晚期结直肠癌患者,采用随机数字表法分为观察组和对照组,每组50例.观察组患者采用CapeOX方案化疗,对照组患者采用SOX方案化疗,...     

Detection of serum p53 antibodies in colorectal cancer patients and the clinical significance of postoperative monitoring

p53 protein overexpression was found to induce the production of antibodies in patient serum and, recently, the easy detection of serum antibodies has been made possible. The aim of this study is to determine the significance of serum p53 antibodies in patients with primary colorectal adenocarcinoma in comparison with their clinicopathological features, and the tumor marker sensitivities of carcinoembryonic antigen (CEA), carcinoma antigen 19-9 (CA19-9) and alpha-fetoprotein (AFP). Thirty-nine of 86 patients (45.3%) were positive for serum p53 antibodies. However, there was no relation with the cancer progression or clinicopathological findings. The sensitivities of CEA, CA19-9 and AFP were 36.0%, 38.4%, and 8.1% respectively, but there was no relation between serum p53 antibodies and these three markers. When the sensitivity of serum p53 antibodies and CEA was evaluated according to clinical stage, the presence of serum p53 antibodies was more significantly associated with stage 0, I and II colorectal cancer than was CEA. Thirty-three patients who showed preoperative positivity for serum p53 antibodies were followed by serial evaluation of circulating antibodies after resection. Negative conversions after resection were significantly higher in the "Cur A" group than in the "Cur B" or "Cur C" groups. Serum p53 antibodies appear to be a useful tumor marker independent of the other markers, especially in the early stage, and are expected to be useful in the development of a method of early diagnosis for mass screening, and as a postoperative monitoring marker for colorectal cancer.     

Stage Association of Preoperative Serum Carcinoembryonic Antigen with Gastric Adenocarcinoma in Iranian Patients

Background: Gastric cancer is the second leading cause of cancer-related mortality and the fourth most common cancer globally. Tumor markers are needed for appropriate management and monitoring of treatment to improve quality of life. Recently, carcinoembryonic antigen (CEA) has been widely used as a tumor marker in the diagnosis and follow-up of some malignancies. The aim of this study was to evaluate the significance of CEA detection in the course of disease in gastric cancer patients at different stages. Methods: Seventy six cases of gastric adenocarcinoma from the Rasht Razi Hospital were studied between January 2016 and December 2016, along with a control group of 152 people. Serum CEA was measured by ELISA reader. Statistical analysis was performed using SPSS 14.0 for Windows (SPSS Inc., Chicago, USA). The two groups were also compared by cross-table analysis using Pearson’s chi-square test, with P-values Results: CEA was positive in 61.8 % of patients versus 2.6% of the control group (P = 0.0001). Some 21% of patients at stages I and II (initial disease) and 40.8% at stages III and IV (advanced disease) demonstrated positive CEA. which was significantly correlated with higher N stage and poor differentiation. Conclusions: Our study showed that a high preoperative CEA level was not prevalent in early stage gastric cancer patients. We recommend to design other prospective studies and meta-analyses for elucidation of claims for diagnostic efficacy.     

The relationship between plasma level of VEGF or soluble Flt-1 and efficacy of hepatic arterial chemotherapy in patients with liver metastasis of colorectal cancer

PURPOSE: To clarify the clinical significance of determining plasma levels of vascular endothelial growth factor (VEGF) and soluble fms-like tyrosine kinase 1 (sFlt-1) in colorectal cancer, changes in plasma levels of VEGF and sFIt 1 during hepatic arterial chemotherapy were investigated in patients with liver metastases of colorectal cancer. PATIENTS AND METHODS: The relationship between plasma level of VEGF or sFlt-1 and serum level of carcinoembryonic antigen (CEA), carbohydrate antigen 19-9 (CA19-9), or the efficacy of hepatic arterial chemotherapy was investigated in patients with liver metastases of colorectal cancer (n=19). Plasma levels of VEGF and sFlt-1 were determined by the enzyme linked immunosorbent assay. RESULTS: There was a positive relationship between plasma level of sFlt-1 and serum level of CEA (p = 0.13). The other combinations did not show any statistical correlations. Also, in terms of the doubling time (DT), there was a positive relationship between the sFlt1-DT and the CEA-DT (p = 0.04). The levels of VEGF tended to change in accordance with the efficacy of chemotherapy. In contrast, plasma levels of sFlt-1 increased in patients with the progressive disease, whereas the levels did not decrease in patients with the partial response. CONCLUSIONS: These results suggested that (1) VEGF may be a useful tumor marker during the chemotherapy in patients, whose CEA and CA19-9 are below the cutoff, and (2) the shrinkage of liver metastases may not cause a decrease in sFlt-1 or the half-life of sFlt-1 may be considerably long.     

Standards, options and recommendations for tumor markers in colorectal cancer]

CONTEXT: The "Standards, Options and Recommendations" (SOR) project, started in 1993, is a collaboration between the French National Federation of Comprehensive Cancer Centers (FNCLCC), the 20 French Cancer Centers and specialists from French Public University or General Hospitals, and Private Clinics. The main objective is the development of clinical practice guidelines to improve the quality of health care and outcome of cancer patients. The methodology is based on literature review and critical appraisal by a multidisciplinary group of experts, with feedback from specialists in cancer care delivery. OBJECTIVES: To define, according to the definitions of the Standards, Options and Recommendations project, the characteristics of the main tumor markers in colorectal cancer and their potential role in the management of patients with this malignancy. METHODS: Data were identified by searching Medline and the personal reference lists of members of the expert groups. Once the guidelines were defined, the document was submitted for review to 117 independent reviewers, and to the medical committees of the 20 French Cancer Centers. RESULTS: The main recommendations for the tumor markers in colorectal cancer are: 1) The carcinoembryonic antigen (CEA) is the reference serum marker (standard). 2) All the analyses for a given patient must be performed in the same laboratory, using the same technique (standard, expert agreement). 3) CEA or CA 19-9 should not be used for screening or diagnosis (standard, level of evidence B2). 4) High initial serum concentration of CEA is of bad predictive value (standard, level of evidence C). CEA is an independent prognostic factor of survival in colorectal cancers with lymph node metastases (standard, level of evidence B2). 5) CEA is the most sensitive biological parameter for the screening of hepatic metastases (standard, level of evidence B2). 6) CEA serum concentration before palliative chemotherapy is an independent prognostic factor of survival (standard, level of evidence B2). The combination of CEA assay with imagery techniques and clinical examination can help monitor the response to palliative chemotherapy (standard), in particular in non measurable disease (standard, expert agreement). 7) In 65% of the cases, CEA is the first indicator of relapse (standard, level of evidence B2). CEA is the choice marker for monitoring patients with colorectal cancer (standard, level of evidence B2). 8) A sustained biological follow-up including CEA assay can be used to predict the operability of recurring tumors (standard, level of evidence B2). Nevertheless, no survival advantage has been shown (standard).     

Prognostic study of preoperative serum levels of CEA and CA 19-9 in colorectal cancer

PURPOSE: Carcinoembrionic Antigen (CEA) and carbohydrate antigen 19-9 (CA 19-9) are the most frequently used tumor markers in the clinical setting of colorectal cancer. The aim of this study is to evaluate the prognostic value of preoperative serum levels of CEA and CA 19-9 in colorectal cancer patients. METHODS: Serum levels of CEA and CA 19-9 were examined in 586 patients with colorectal cancer. Cut-off levels were calculated at reference value:<2.5 ng/mL (group A) versus >2.5 ng/mL (group B) for CEA and, <37 U/mL (group A) versus >37 U/mL (group B) for CA 19-9. RESULTS: According to tumor progression, each marker tended to show a higher level. Group A showed a significantly better prognosis than group B in both CEA and CA 19-9. In Dukes classification A, B and C, only CEA showed a better prognosis in group A than group B. At the time of recurrence compared to the pre-operative point, the CEA and CA 19-9 levels were significantly higher in both group A and B, however. In relation to the necessity of adjuvant chemotherapy (5-FU containing regimen) in Dukes A, the cases without adjuvant chemotherapy in group B of CEA showed a poor prognosis. CONCLUSION: The measurement of preoperative serum CEA and CA 19-9 is useful for prognostic prediction in colorectal cancer. Cut-off levels calculated at the reference value reflect the prognosis in this study. Especially, preoperative CEA reveals a potential high risk group in Dukes A which should be carefully treated by adjuvant chemotherapy to avoid recurrence.     

大肠癌患者血清癌胚抗原、可溶性 Fas、白细胞 介素 -6水平测定及其临床意义

目的探讨大肠癌患者血清癌胚抗原（carcinoembryonic antigen,CEA）、可溶性Fas(solubleFas,sFas)、白细胞介素-6(interleukin-6,IL-6)水平的临床意义。方法采用双抗体夹心ELISA方法检测162例大肠癌患者术前、术后血清中sFas、IL-6表达水平,同时测定了相关免疫指标及血清CEA水平。结果大肠癌患者血清sFas水平为（20.97±8.19）ng/L,阳性率为53.70％;IL-6水平为（36.87±11.20）ng/L,阳性率67.91％;CEA水平为（32.52±10.81）μg/L,阳性率41.98％,三者均非常显著高于良性病变及对照组。大肠癌患者术前血清CEA、sFas、IL-6水平均显著高于术后（P<0.01),以sFas、IL6水平升高更明显。血清sFas水平与癌转移相关,而血清IL6与肿瘤大小及癌转移明显相关（P<0.01)。仅血清sFas水平与淋巴细胞转化率、LAK及NK活性呈显著负相关。CEA、IL6、sFas三者之间均呈显著正相关。结论大肠癌患者血清sFas、IL6检测阳性率高于CEA。sFas、IL6反映了肿瘤的增殖和转移情况,这可能与sFas抑制了免疫功能和肿瘤细胞的凋亡有关;IL6有促进肠癌细胞的增殖作用。三者联合检测对大肠癌患者的临床诊断、判断预后及监测疗效有重要作用。     

Serum levels of CA 125 in patients with gastrointestinal cancers

Serum levels of CA 125 and markers reputed as specific for cancers in relevant locations (squamous cell carcinoma, SCC, carcinoembryonic antigen, CEA, CA 19.9, alpha-fetoprotein, AFP) were determined in 107 patients with gastrointestinal (GI) carcinomas. The aim of this study was to assess their individual and combined sensitivities, and the power of CA 125 in excluding primary ovarian epithelial cancer from GI primary. Serum CA 125 levels (in U/ml) ranged from nondetectable to 400 in patients with esophageal, to 570 in those with gastric, and to 300 in patients with colorectal carcinoma. The levels for liver secondaries, pancreatic, and hepatocellular carcinoma were 480, 2,720 and 1,100 U/ml, respectively. Serum SCC antigen was elevated in all patients with esophageal cancer, CEA or CA 19.9 in 52% of patients with gastric cancer and in 63% with liver secondaries, and CEA in 95% of patients with colorectal cancer; whereas serum CA 125 above 65 U/ml was found in 25% of this subgroup, but only in those with already an elevated concentration of specific marker(s). Serum CEA or CA 19.9 was elevated in 71%, CA 125 in 59% of patients with pancreatic cancer; the latter mostly in those with already elevated CEA or CA 19.9. Serum AFP was elevated in 84% and CA 125 in 40% of patients with hepatoma; the latter mostly in those with already an elevated AFP. CA 125 values exceeding 1,000 U/ml were found in 1 patient with pancreatic cancer (2,720 U/ml) and in 2 with hepatoma (1,050 and 1,100 U/ml). These findings illustrate the nonspecificity of the CA 125 antigen, its small if any advantage compared to the specific markers, and they diminish its role as a marker for primary ovarian cancer from GI primary unless it exceeds 2,800 U/ml.     

胃癌患者外周血癌胚抗原mRNA表达及其临床意义分析

目的：探讨胃癌患者外周血癌胚抗原（CEA）mRNA表达及其与相关病理因素、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58例胃癌患者化疗前、后20例健康对照者外周血癌胚抗原CEAmRNA表达；同时采用化学发光法测定胃癌患者血清CEA水平。患者随访2年。结果：胃癌患者外周血CEAmRNA阳性率为56．89％（33／58），显著高于健康对照组，二者差异有统计学意义（P〈0．001）；胃癌患者外周血CEAmRNA表达与肿瘤浸润深度（P=0．035）、淋巴结转移（P=0．042）、远处转移（P=0．006）和血清CEA水平相关（P=0．001）；多因素Logistic回归分析表明：淋巴结转移和血清CEA水平是影响胃癌患者外周血CEAmRNA表达的独立因素；血清CEA阳性率31．03％（18／58），胃癌患者外周血CEAmRNA的阳性率显著高于CEA蛋白水平（Χ^2=7．873，P=0．005），TaqMan定量RT—PCR与化学发光法检测CEA的符合率为88．89％（化学发光法检测阳性的病例TaqMan定量RT—PCR检测阳性率）；化疗后CEAmRNA阳性率略有下降，但不显著。近期疗效无效的患者外周血CEAmRNA的阳性率显著高于近期疗效有效的患者（Χ^2=9．992，P=0．002）。平均随访2年后，CEAmRNA阳性患者与阴性患者的1年生存率分别是33．33％和77．27％，差异具有显著性（P=0．002）。结论：外周血CEAmRNA可作为检测胃癌患者肿瘤细胞微转移的分子标志；定期监测胃癌患者外周血CEAmRNA表达有助于评估化疗疗效和预测预后。肿瘤浸润深度和血清CEA蛋白水平与外周血肿瘤细胞微转移相关。CEAmRNA的检测优于蛋白水平的检测，有助于胃癌的早期诊断。     

Transient CEA increase at start of oxaliplatin combination therapy for metastatic colorectal cancer

In general a rising carcinoembryonic antigen (CEA) level means tumor progression. We observed a transient increase in CEA level despite objective response among patients receiving chemotherapy for metastatic colorectal cancer. This surge phenomenon has not previously been described for patients with metastatic colorectal disease. CEA was measured every second week in 27 patients receiving oxaliplatin, 5-fluororuracil, and folinic acid as first-line therapy against metastatic colorectal cancer. Four patients (15%, 95% CI 5-31%) met the criteria for therapy-induced CEA surge. The time of reaching maximum CEA level varied from 13 to 56 days. Median rise in CEA from baseline was 263% (range 24-632%). An initial rise of CEA during chemotherapy in colorectal cancer patients may therefore not always indicate progression of disease but may be a transient CEA surge in patients responding to chemotherapy.