Combining prognostic value of serum carbohydrate antigen 19-9 and tumor size reduction ratio in pancreatic ductal adenocarcinoma

BACKGROUND Pancreatic ductal adenocarcinoma(PDAC)is a common cancer with increasing morbidity and mortality due to changes of social environment.AIM To evaluate the significance of serum carbohydrate antigen 19-9(CA19-9)and tumor size changes pre-and post-neoadjuvant therapy(NAT).METHODS This retrospective study was conducted at the Chongqing Key Laboratory of Translational Research for Cancer Metastasis and Individualized Treatment,Chongqing University Cancer Hospital.This study specifically assessed CA19-9 levels and tumor size before and after NAT.RESULTS A total of 156 patients who completed NAT and subsequently underwent tumor resection were included in this study.The average age was 65.4±10.6 years and 72(46.2%)patients were female.Before survival analysis,we defined the post-NAT serum CA19-9 level/pre-NAT serum CA19-9 level as the CA19-9 ratio(CR).The patients were divided into three groups:CR<0.5,CR>0.5 and<1 and CR>1.With regard to tumor size measured by both computed tomography and magnetic resonance imaging,we defined the post-NAT tumor size/pre-NAT tumor size as the tumor size ratio(TR).The patients were then divided into three groups:TR<0.5,TR>0.5 and<1 and TR>1.Based on these groups divided according to CR and TR,we performed both overall survival(OS)and disease-free survival(DFS)analyses.Log-rank tests showed that both OS and DFS were significantly different among the groups according to CR and TR(P<0.05).CR and TR after NAT were associated with increased odds of achieving a complete or near-complete pathologic response.Moreover,CR(hazard ratio:1.721,95%CI:1.373-3.762;P=0.006),and TR(hazard ratio:1.435,95%CI:1.275-4.363;P=0.014)were identified as independent factors associated with OS.CONCLUSION This study demonstrated that post-NAT serum CA19-9 level/pre-NAT serum CA19-9 level and post-NAT tumor size/pre-NAT tumor size were independent factors associated with OS in patients with PDAC who received NAT and subsequent surgical resection.

Comparisons of voided urine cytology, nuclear matrix protein-22 and bladder tumor associated antigen tests for bladder cancer of geriatric male patients in Taiwan, China

Aim： To compare the results of bladder tumor associated antigen （BTA TRAK）, nuclear matrix protein 22 （NMP 22） and voided urine cytology （VUC） in detecting bladder cancer. Methods： A total of 135 elderly male and 50 healthy volunteers enrolled in this study were classified into three groups： （i） 93 patients with bladder cancer; （ii） 42 patients with urinary benign conditions; and （iii） 50 healthy volunteers. BTA TRAK and NMP 22 kits were used to detect bladder cancer. Voided urine cytology was used to compare the sensitivity and specificity of the screening tests. Results： The sensitivity and specificity of cytology, BTA TRAK and NMP 22 were 24% and 97%, 51% and 73%, 78% and 73%, respectively. The level of NMP 22 increased with tumor grading. The BTA TRAK kit has the lowest sensitivity among the screening tests. The NMP 22 with the best sensitivity can be an adjunct to cytology for evaluating bladder cancer. Conclusion： The NMP 22 test has a better correlation with the grading of the bladder cancer than BTA TRAK. As cytology units are typically not available in hospitals or in outpatient clinics, NMP 22 might be a promising tool for screening bladder cancer.

HCA520, A NOVEL TUMOR ASSOCIATED ANTIGEN, INVOLVED IN CELL PROLIFERATION AND APOPTOSIS

Objective: Tumor associated antigen encoding gene HCA520 (AF146019) was identified by screening a human hepatocellular carcinoma expressing cDNA library using SEREX technique. In this experiment we studied the effect of HCA520 on cell proliferation and apoptosis. Methods: Gene HCA520 was gained by PCR and transfected into 293 cells. The stable expression cells were obtained by G418 selection. The cell proliferation was measured by [3H]-TdR uptake and apoptosis assay was measured by FACS. Results: Eukaryotic expression plasmid pcDNA3-HCA520 was constructed and its stable transfectants were obtained. Overexpression of HCA520 inhibited the cell proliferation and enhanced cell apoptosis after serum deprivation. Conclusion: HCA520 is a novel tumor associated antigen that can affect cell proliferation and apoptosis.

Diagnostic value of elevated serum carbohydrate antigen 199 level in acute cholangitis secondary to choledocholithiasis

AIM To investigate the diagnostic value of abnormal serum carbohydrate antigen 199(CA199) level in acute cholangitis secondary to choledocholithiasis.METHODS In this retrospective cohort study, the clinical data of 727 patients with choledocholithiasis admitted to the Third Affiliated Hospital of Zunyi Medical College from June 2011 to June 2017 were collected. Among these patients, 258 patients had secondary acute cholangitis and served as observation group, and the remaining 569 choledocholithiasis patients served as the control group. Serum liver function indexes and tumor markers were detected in both groups, and the receiver operating characteristic(ROC) curves were constructed for markers showing statistical significances. The cutoff value, sensitivity, and specificity of each marker were calculated according to the ROC curves. RESULTS The results of liver function tests showed no significant differences between the two groups(P > 0.05). Tumor markers including serum CA125, CA153, carcinoembryonic antigen, and alpha fetoprotein levels were also not significantly different(P > 0.05); however, the serum CA199 level was significantly higher in the observation group than in the control group(P < 0.05). The ROC curve analysis showed that the area under the curve was 0.885(95%CI: 0.841-0.929) for CA199, and the cutoff value of 52.5 kU/L had the highest diagnostic accuracy, with a sensitivity of 86.8% and a specificity of 81.6%.CONCLUSION Abnormally elevated serum CA199 level has an important value in the diagnosis of acute cholangitis secondary to choledocholithiasis. It may be a specific inflammatory marker for acute cholangitis.

Colorectal cancer vaccines: Tumor-associated antigens vs neoantigens

Therapeutic options for the treatment of colorectal cancer(CRC) are diverse but still not always satisfying. Recent success of immune checkpoint inhibition treatment for the subgroup of CRC patients suffering from hypermutated tumors suggests a permanent role of immune therapy in the clinical management of CRC. Substantial improvement in treatment outcome could be achieved by development of efficient patient-individual CRC vaccination strategies. This mini-review summarizes the current knowledge on the two general classes of targets: tumor-associated antigens(TAAs) and tumorspecific antigens. TAAs like carcinoembryonic antigen and melanoma associated antigen are present in and shared by a subgroup of patients and a variety of clinical studies examined the efficacy of different TAA-derived peptide vaccines. Combinations of several TAAs as the next step and the development of personalized TAA-based peptide vaccines are discussed. Improvements of peptidebased vaccines achievable by adjuvants and immunestimulatory chemotherapeutics are highlighted. Finally, we sum up clinical studies using tumor-specific antigens-in CRC almost exclusively neoantigens-which revealed promising results; particularly no severe adverse events were reported so far. Critical progress for clinical outcomes can be expected by individualizing neoantigen-based peptide vaccines and combining them with immunestimulatory chemotherapeutics and immune checkpoint inhibitors. In light of these data and latest developments, truly personalized neoantigen-based peptide vaccines can be expected to fulfill modern precision medicine's requirements and will manifest as treatment pillar for routine clinical management of CRC.

Autoantibodies against tumor-associated antigens for detection of hepatocellular carcinoma

Hepatocellular carcinoma(HCC) is one of the most common tumors worldwide. The survival rate after the onset of symptoms is generally less than one year for the late presentation of HCC, and reliable tools for early diagnosis are lacking. Therefore, novel biomarkers for the early detection of HCC are urgently required. Recent studies show that the abnormal release of proteins by tumor cells can elicit humoral immune responses to self-antigens called tumor-associated antigens(TAAs). The corresponding autoantibodies can be detected before the clinical diagnosis of cancer. Therefore, there is growing interest in using serum autoantibodies as cancer biomarkers. In this review, we focus on the advances in research on autoantibodies against TAAs as serum biomarker for detection of HCC, the mechanism of the production of TAAs, and the association of autoantibodies with patients' clinical characteristics.

A Novel Putative Tumor Associated Antigen

A is a tumor associated antigen. Monoclonal antibody (mAb) against 17 1A has been used in adjuvant therapy of colorectal carcinoma. Using mAb against 17 1A antigen on affinity chromatography, a novel putative tumor associated antigen (P50) whose relative molecular mass is 5 0×10 4 has been isolated from human colorectal tumor tissues which are recognized by mAbs 17 1A and M79, while the relative molecular mass of 17\|1A antigen isolated from several colorectal tumor cell lines is 3 3×10 4. P50 was recognized by mAbs 17 1A and M79 which are specific mAbs against 17 1A antigen.

Preliminary study of the diagnosis of pancreatic cancer with a serum pancreatic cancer－associated antigen

The serum of 40 normal subjects, 61 cases of various malignant diseases except pancreatic cancer,53 cases of various benign diseases and 33 cases of pancreatic cancer was examined with ELISA to determine the serum level of pancreatic cancer-associated ant

Chimeric antigen receptor-engineered T-cell therapy for liver cancer

Background: Chimeric antigen receptor-engineered T-cell(CAR-T) therapy is a newly developed immunotherapy used in the treatment of cancers. Because CAR-T therapy has shown great success in treating CD19-positive hematological malignancies, its application has been explored in the treatment of solid tumors, such as liver cancer. In this review, we discuss the immune characteristics of liver cancer, the obstacles encountered during the application of CAR-T therapy, and preclinical and clinical progress in the use of CAR-T therapy in patients with liver cancer.Data sources: The data on CAR-T therapy related to liver cancers were collected by searching Pub Med and the Web of Science databases prior to December 2017 with the keywords "chimeric antigen receptor","CAR-T", "liver cancer", "hepatocellular carcinoma", and "solid tumor". Additional articles were identified by manual search of references found in the primary articles. The data for clinical trials were collected by searching Clinical Trials.gov.Results: The liver has a tolerogenic nature in the intrahepatic milieu and its tumor microenvironment significantly affects tumor progression. The obstacles that reduce the efficacy of CAR-T therapy in solid tumors include a lack of specific tumor antigens, limited trafficking and penetration of CAR-T cells to tumor sites, and an immunosuppressive tumor microenvironment. To overcome these obstacles, several strategies have emerged. In addition, several strategies have been developed to manage the side effects of CAR-T, including enhancing the selectivity of CARs and controlling CAR-T activity. To date, no clinical trials of CAR-T therapy against HCC have been completed. However, preclinical studies in vitro and in vivo have shown potent antitumor efficacy. Glypican-3, mucin-1, epithelial cell adhesion molecule, carcinoembryonic antigen, and other targets are currently being studied.Conclusions: The application of CAR-T therapy for liver cancer is just beginning to be explored and more research is needed. However, we are optimistic that CAR-T therapy will offer a new approach for the treatment of liver cancers in the future.

Microplate chemiluminescence enzyme immunoassay for the quantitative evaluation of carbohydrate antigen 72-4 in human serum

A highly sensitive and specific microplate chemiluminescence enzyme immunoassay (CLEIA) was developed for the quantitative evaluation of carbohydrate antigen 72-4 (CA72-4) in human serum, using luminol-H2O2 catalyzed by horseradish peroxidase (HRP) as the chemiluminescence system. The simple and quick determination was accomplished through a sandwich reaction mode. Several physico-chemical parameters of the immunoreaction, including incubation conditions, antibody coating conditions, dilution ratio of anti-CA72-4-HRP conjugate, and chemiluminescence reaction time, were studied and optimized. The proposed method exhibited a linear range of 0―200 U/mL with correlation coefficient and detection limit of 0.9995 and 0.18 U/mL, respectively. The inter-assay and intra-assay coeffi-cients of variation (CV) were both less than 10%. The average recovery of two clinical sera with low and high concentration CA72-4 was 99.3% and 98.7%, respectively. Normal tumor markers, including AFP, CEA, CA24-2, CA19-9 and CA15-3, did not cross-react with each other. The method's stability was evaluated by assessing its analytical performance after storing the immunoreagents at 4℃ and 37℃ for 7 days. Little difference was found, indicating satisfactory stability of the method. The present method has been successfully applied to the detection of CA72-4 human serum, and showed a good correlation with the commercially available ELISA kit (r 2=0.9383). This method showed great potential in the fabrication of diagnostic kit for CA72-4, and could be well used in diagnosis of cancer in clinical practice.

Identification of novel HLA-A 0201-restricted epitopes from anterior gradient-2 as a tumor-associated antigen against colorectal cancer

Anterior gradient-2 （AGR2） promotes tumor growth, cell migration and cellular transformation and its enhanced expression is almost completely restricted to malignant tissues, thus making AGR2 an interesting target for the development of immunotherapeutic strategies. We investigated whether the AGR2 molecule comprises human leukocyte antigen （HLA）-A 0201-binding epitopes recognized by human cytotoxic T lymphocytes （CTLs）, which could be targeted in dendritic cell （DC）-based cancer immunotherapy against colorectal cancer （CRC）. We reviewed the sequence of AGR2 for peptides that could potentially bind to HLA-A 0201 with the aid of a computer-based program. Five candidate peptides with different binding scores were synthesized and tested. These peptides were then assessed for their immunogenicity to elicit specific immune responses mediated by CTLs in vitro by means of enzyme-linked immunospot assays and CTL assays. AGR2 was highly expressed in several CRC cell lines, including DK01, DLD1, KM 12C, HCT-8 and HT-29. DCs pulsed with AGR2-P2 （aa 11-19; LLVALSYTL） or AGR2-P4 （aa 127-135; RIMFVDPSL） generated potent CTLs that could lyse T2 cells pulsed with AGR2-P2 or AGR2-P4 and HLA-A0201＋ AGR2-positive CRC cell lines in a strong dose-dependent and HLA-A 0201-restricted manner. In conclusion, these novel epitopes derived from AGR2 protein may be attractive candidates for DC-based immunotherapy for CRC.

IL-35、Beclin-1在乳腺癌患者外周血中的水平及意义

目的探讨白细胞介素(IL)-35、自噬相关蛋白Beclin-1在乳腺癌患者外周血中的水平及意义。方法选取2022年5-10月在上海市嘉定区妇幼保健院诊治的原发性乳腺癌女性患者44例(乳腺癌组)、乳腺良性肿瘤女性患者40例(乳腺良性肿瘤组)及体检的健康者40例(健康对照组)作为研究对象。采用酶联免疫吸附试验检测并比较各组外周血中IL-35和Beclin-1水平,同时检测乳腺癌患者糖类抗原15-3(CA15-3),比较不同临床病理特征的乳腺癌患者IL-35、Beclin-1、CA15-3水平;分析乳腺癌患者外周血IL-35、Beclin-1、CA15-3水平之间的相关性。结果乳腺癌组和乳腺良性肿瘤组外周血IL-35水平均高于健康对照组(P<0.05),Beclin-1水平均低于健康对照组(P<0.05)。乳腺癌组外周血IL-35水平高于乳腺良性肿瘤组(P<0.05),Beclin-1水平低于乳腺良性肿瘤组(P<0.05)。不同病理分级、淋巴结转移情况的乳腺癌患者外周血IL-35、Beclin-1水平比较,差异均有统计学意义(P<0.05);不同雌激素受体(ER)检测结果的乳腺癌患者外周血IL-35水平比较,差异无统计学意义(P>0.05),而Beclin-1水平比较,差异有统计学意义(P<0.05)。乳腺癌患者外周血IL-35水平与Beclin-1水平呈负相关(r=-0.484,P<0.05);IL-35、Beclin-1水平与CA15-3水平均无相关性(均P>0.05)。结论乳腺癌患者外周血IL-35水平升高、Beclin-1水平降低。不同病理分级、淋巴结转移情况的乳腺癌患者外周血IL-35、Beclin-1水平有明显差异。乳腺癌患者外周血IL-35水平与Beclin-1水平呈负相关,而IL-35、Beclin-1水平与肿瘤标志物CA15-3水平均无关。

临床特征联合血清CA19-9、HE4对子宫内膜异位症相关卵巢癌症的诊断价值

目的 探讨临床特征联合血清糖类抗原(CA) 19-9、人附睾蛋白4 (HE4)对子宫内膜异位症相关卵巢癌症(EAOC)的诊断价值。方法 选择2020年1月至2022年12月在河南中医药大学第三附属医院接受手术且经术后病理确诊为EAOC的43例患者作为观察组,按照1∶2的比例抽取同期在我院手术且经术后证实为卵巢子宫内膜异位症(OEM)的86例患者作为对照组。比较两组患者的临床资料及血清CA125、CA19-9和HE4水平,采用多因素Logistic回归分析影响EAOC的独立风险因素,并采用受试者工作特征曲线(ROC)分析临床特征、CA19-9和HE4诊断EAOC的价值。结果 观察组患者的CA19-9和HE4水平分别为[20.99 (17.06,32.40)] U/mL和[64.47 (55.93,72.01)] U/mL,明显高于对照组的[4.98(2.18,10.86)] U/mL和[43.39(34.61,52.40)] U/mL,差异均有统计学意义(P<0.05);观察组患者的CA125水平为[59.85 (39.51,92.26)] pmol/L,明略高于对照组的[56.58 (39.80,80.68)] pmol/L,但差异无统计学意义(P>0.05)。经多因素Logistic回归分析结果显示,CA19-9、HE4、年龄、肿瘤最长径是影响EAOC的风险因素(P<0.05)。经ROC分析结果显示,年龄、肿瘤最长径、CA19-9、HE4联合检测的曲线下面积(AUC)为0.958,明显高于单独检测(年龄:0.857;肿瘤最长径:0.767;CA19-9:0.767;HE4:0.808)(P<0.05)。结论 CA19-9、HE4、年龄、肿瘤最长径可用于预测EAOC,联合检测可提高诊断效能。

血清肿瘤标志物CEA、CA-199、CA125及VEGF联合检测对肺癌诊断的价值

目的本研究目的在于探究肺癌患者中CEA、CA-199、CA125以及VEGF的表达情况,并评价它们在肺癌诊断和治疗中的临床应用价值。方法选取2023年1月至2023年10月期间入院接受肺部疾病检查并确诊为肺癌的84例患者作为观察组,另取80名健康人作为对照组。通过t检验比较两组中的血清肿瘤标志物水平,评估其在肺癌风险评估中的应用价值。此外,采用受试者操作特征曲线(ROC)分析各指标在肺癌辅助诊断中的有效性。结果观察组与对照组比较,CEA、CA-199、CA125和VEGF的血清水平差异具有统计学意义(P<0.05)。Logistic回归分析表明,血清CEA、CA-199、CA125和VEGF水平升高与肺癌风险增加相关(P<0.05)。ROC曲线分析显示,CEA、CA-199、CA125联合VEGF在诊断肺癌方面的AUC值为0.855,明显高于单一测定。结论CEA、CA-199、CA125和VEGF的联合检测在肺癌的早期筛查、诊断和随访中具有显著的临床价值,能显著提高肺癌诊断的敏感性和特异性,可能对于肺癌患者的早期诊断和治疗决策提供较为重要参考。

调经止痛丸对子宫内膜异位症气滞血瘀证患者腹腔镜术后CA125的影响

目的观察调经止痛丸对子宫内膜异位症(endometriosis,EMS)气滞血瘀证患者腹腔镜术后临床症状及癌胚抗原125(carcinoembryonic antigen 125,CA125)的影响。方法选取河北省沧州中西医结合医院120例接受腹腔镜手术治疗的EMS气滞血瘀证患者,随机分为对照组和观察组,各60例。对照组术后予以常规西药进行治疗,观察组在对照组基础上服用调经止痛丸,连续治疗6个月。比较两组临床疗效、中医证候积分、血清CA125、肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)水平及不良反应。结果观察组总有效率96.67%,高于对照组85.00%(P<0.05);观察组治疗后中医证候积分及CA125、TNF-α水平显著低于对照组(P<0.01);两组患者不良反应发生率差异无统计学意义(P>0.05)。结论调经止痛丸可有效减轻EMS气滞血瘀证患者腹腔镜术后临床症状,改善TNF-α及CA125水平。

Cancer stem cell-targeted chimeric antigen receptor(CAR)-T cell therapy: Challenges and prospects

Cancer stem cells(CSCs)with their self-renewal ability are accepted as cells which initiate tumors.CSCs are regarded as interesting targets for novel anticancer therapeutic agents because of their association with tumor recurrence and resistance to conventional therapies,including radiotherapy and chemotherapy.Chimeric antigen receptor(CAR)-T cells are engineered T cells which express an artificial receptor specific for tumor associated antigens(TAAs)by which they accurately target and kill cancer cells.In recent years,CAR-T cell therapy has shown more efficiency in cancer treatment,particularly regarding blood cancers.The expression of specific markers such as TAAs on CSCs in varied cancer types makes them as potent tools for CAR-T cell therapy.Here we review the CSC markers that have been previously targeted with CAR-T cells,as well as the CSC markers that may be used as possible targets for CAR-T cell therapy in the future.Furthermore,we will detail the most important obstacles against CART cell therapy and suggest solutions.

PTEN、CA125、sVEGFR1、NGAL在子宫内膜癌患者血清中的表达及与病理特征的关系

目的 探讨第10号染色体缺失的磷酸酶及张力蛋白同源基因(PTEN)、糖类抗原125(CA125)、可溶性血管内皮生长因子受体-1(sVEGFR1)、中性粒细胞明胶酶相关脂质载运蛋白(NGAL)在子宫内膜癌(EC)患者血清中的表达及与病理特征的关系。方法 选取2019年1月至2021年6月于在邯郸市第一医院行全子宫切除术并经病理诊断的120例EC患者为研究组,选择同期80例良性病变子宫内膜患者为对照组,用酶联免疫吸附法检测并比较2组患者血清PTEN、CA125、sVEGFR1、NGAL水平,收集2组临床病理资料,分析血清PTEN、CA125、sVEGFR1、NGAL与研究组患者病理特征的关系。结果 研究组血清CA125、NGAL水平高于对照组,血清PTEN、sVEGFR1水平低于对照组(P<0.05)。分化程度越低血清CA125、NGAL水平越高,血清PTEN、sVEGFR1水平越低(P<0.05);临床分期Ⅲ~Ⅳ期患者血清PTEN高于Ⅰ~Ⅱ期(P<0.05);临床分期Ⅲ~Ⅳ期、有淋巴结转移、浸润深度≥50%患者血清CA125、NGAL水平升高,血清sVEGFR1水平降低(P<0.05)。血清PTEN与临床分期呈负相关,与分化程度呈正相关(P<0.05);血清CA125、NGAL与临床分期、淋巴结转移、浸润深度呈正相关,与分化程度呈负相关(P<0.05);血清sVEGFR1与临床分期、淋巴结转移、浸润深度呈负相关,与分化程度呈正相关(P<0.05)。结论 CA125、NGAL在EC患者血清中呈高表达,PTEN、sVEGFR1呈低表达,均与EC患者病理特征有一定相关性,可作为EC早期诊断与疾病进展的潜在生物学标志物。

循环肿瘤细胞及糖类抗原125新型联用诊断模式在卵巢上皮性癌诊断中的价值

目的:探讨循环肿瘤细胞(CTCs)联合糖类抗原125(CA 125)对卵巢上皮性癌(EOC)的诊断价值。方法:选择2013年9月1日至2020年12月31日于北京大学第三医院收治经病理确诊的160例EOC患者和非癌对照(50例卵巢良性病变患者及40例健康成年女性)为研究对象。采用免疫磁珠分离法检测CTCs的表达,通过酶联免疫法检测CA 125的表达,并绘制受试者工作特征(ROC)曲线探讨两者诊断EOC的最佳组合方式。结果:①EOC患者与非癌对照时,CA 125>35 U/ml和CTCs阳性诊断EOC的敏感度分别为75.6%、79.4%,特异度分别为82.2%、91.1%。EOC患者与卵巢良性病变患者时,CA 125>35 U/ml及CTCs阳性诊断EOC的敏感度不变(仍分别为75.6%、79.4%),特异度均有所下降(分别为68.0%、86.0%)。②传统的并联试验诊断EOC的敏感度提高至95.0%,但特异度降低至58.0%;传统的串联试验诊断EOC的特异度提高至96.0%,但敏感度降低至60.0%。③定义CTCs及CA 125的新型联用诊断模式检出阳性为:CA 125≥90 U/ml或25 U/ml<CA 125<90 U/ml且CTCs阳性。采用新型联用诊断模式诊断EOC的敏感度为88.8%,特异度为86.0%。结论:CTCs或CA 125单独区分卵巢良恶性肿物时的敏感度均不高,且特异度偏低,特别是CA 125。传统的并联或串联试验不能提高EOC诊断效能;CTCs及CA 125新型联用诊断模式提高了EOC诊断的敏感度,同时保证了特异度没有降低。

Markers of bile duct tumors

Biliary tract carcinomas are relatively rare,representing less than 1%of cancers.However,their incidence has increased in Japan and in industrialized countries like the USA.Biliary tract tumors have a poor prognosis and a high mortality rate because they are usually detected late in the course of the disease;therapeutic treatment options are often limited and of minimal utility.Recent studies have shown the importance of serum and molecularmarkers in the diagnosis and follow up of biliary tract tumors.This review aims to introduce the main features of the most important serum and molecular markers of biliary tree tumors.Some considerable tumor markers are cancer antigen 125,carbohydrate antigen 19-9,carcinoembryonic antigen,chromogranin A,mucin 1,mucin 5,alpha-fetoprotein,claudins and cytokeratins.

MAGEA12在胃肠道间质瘤中的表达及其与危险度分级的关系

目的:探讨胃肠道间质瘤(gastrointestinal stromal tumors,GIST)中黑色素瘤相关抗原基因A12(melanomaassociated antigen gene A12,MAGEA12)的表达水平及其与GIST危险度分级的关系。方法:收集5例GIST患者的肿瘤组织及癌旁组织,采用转录组测序的方法,通过主成分分析(principal components analysis,PCA)、基因集富集分析(gene set enrichment analysis,GSEA)及差异表达基因分析法,明确GIST组织异常信号通路及异常表达基因;采用实时荧光定量PCR(quantitative real-time PCR,qRT-PCR)法验证90对GIST组织中异常表达基因MAGEA12的表达水平,并通过χ2检验分析MAGEA12的表达水平与GIST患者临床病理特征的相关性。结果:PCA显示GIST组织基因表达谱与癌旁组织比较差异有统计学意义;GSEA发现,GIST组织中多种肿瘤相关信号通路异常高表达;差异表达基因分析发现,MAGEA12是GIST组织中表达上调最高的基因(表达升高25倍);qRT-PCR验证了MAGEA12在GIST样本中显著高表达,且与GIST危险度分级呈正相关。结论:MAGEA12在GIST中高表达,其表达水平与GIST危险度相关,可能成为治疗的新靶点。