Tumor Markers Cancer Antigen 125 Research Articles

18F-Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography as a Valuable Diagnostic Tool in Patients with Ovarian Cancer and Its Correlation with Tumor Marker Cancer Antigen-125.

18F-Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography as a Valuable Diagnostic Tool in Patients with Ovarian Cancer and Its Correlation with Tumor Marker Cancer Antigen-125.

Clinical value of preoperative serum tumor markers CEA, CA19-9, CA125, and CA15-3 in surgically treated urachal cancer.

Urachal adenocarcinoma (UrAC) is a very rare malignancy with a poor prognosis. The role of preoperative serum tumor markers (STMs) in UrAC is unknown. The aim of this study was to assess the clinical value of elevated STMs including carcinoembryonic antigen (CEA), cancer antigen 19-9 (CA19-9), cancer antigen 125 (CA125), and cancer antigen 15-3 (CA15-3) in surgically treated UrAC, and to evaluate their prognostic significance. This was a retrospective study of consecutive patients with histopathologically confirmed UrAC who underwent surgical treatment at a single tertiary hospital. Blood levels of CEA, CA19-9, CA125, and CA15-3 were determined before surgery. The proportion of patients with elevated STMs was calculated, as well as the association between elevated STMs and clinicopathological characteristics, recurrence-free survival and disease-specific survival. Of the 50 patients included; CEA, CA 19-9, CA125, and CA15-3 were elevated in 40%, 25%, 26%, and 6% respectively. Elevated CEA was associated with higher pT-stage (odds ratio [OR] 3.3 [95% confidence interval 1.0-11.1], P = 0.003), higher Sheldon stage (OR 6.9 [95% CI 0.8-60.4], P = 0.01), male sex (OR 4.7 [95% CI 1.2-18.3], P = 0.01), and the presence of peritoneal metastases at the time of diagnosis (OR 3.5 [95% CI 0.9-14.2], P = 0.04). Elevated CA19-9 was associated with signet-cell component (OR 1.7 [95% CI 0.9-3.3], P = 0.03) and elevated CA125 was associated with peritoneal metastases at the time of diagnosis (OR 6.0 [95% CI 1.2-30.6], P = 0.04). Elevated STMs before surgery were not associated with recurrence-free survival and/or disease-specific survival. A subset of patients with surgically treated UrAC has elevated STMs preoperatively. CEA was most frequently (40%) elevated and correlated with unfavorable tumor characteristics. However, STM levels did not correlate with prognostic outcomes.

Preoperative PET/CT score can predict incomplete resection after debulking surgery for advanced serous ovarian cancer better than CT score, MTV, tumor markers and hematological markers.

Complete resection after debulking surgery is strongly associated with prolonged survival for advanced serous ovarian cancer (ASOC). Though positron emission tomography/computed tomography (PET/CT) is more advantageous than computed tomorgraphy (CT) for detecting metastases, studies on the PET/CT prediction model for incomplete resection for ovarian cancer are insufficient. We analyzed and compared the predictive value of preoperative PET/CT score, CT score, metabolic parameters, tumor markers and hematological markers for incomplete resection after debulking surgery for ASOC. A total of 62 ASOC patients who underwent preoperative [18 F]FDG PET/CT and debulking surgery were retrospectively analyzed. PET/CT and CT scores were based on the Suidan model. The predictive value of PET/CT score, CT score, the maximum standardized uptake value (SUVmax), metabolic tumor volume (MTV), human epididymis protein 4 (HE4), cancer antigen 125 (CA125), lymphocyte-to-monocyte ratio (LMR), platelet-to-lymphocyte ratio (PLR) and neutrophil-to-lymphocyte ratio (NLR) for incomplete resection were analyzed and compared. Preoperative PET/CT score had the highest predictive value for incomplete resection in primary debulking surgery group (sensitivity: 65.0%, specificity: 88.9%, area under the ROC curve (AUC): 0.847, p < 0.001), however, in secondary debulking surgery group, preoperative PET/CT score and CT score had the same and highest predictive value for incomplete resection (sensitivity: 80.0%, specificity: 94.7%, AUC: 0.853, p=0.017), compared with preoperative metabolic parameters SUVmax and MTV, tumor markers HE4 and CA125, and hematological markers LMR, PLR and NLR. Preoperative PET/CT score ≥ 3 (Suidan model) and preoperative PET/CT score ≥ 2 predicted a high risk of incomplete resection after primary and secondary debulking surgeries, respectively. There was no statistical difference between primary and secondary debulking surgery groups in predictive value of PET/CT score for incomplete resection (p=0.971). There were significant differences between PET/CT scores and CT scores in primary debulking surgery group and no significant differences in secondary debulking surgery group. A high PET/CT score predicted a high risk of incomplete resection. The preoperative PET/CT score had an identical predictive value in primary and secondary debulking surgery groups. PET/CT score was more accurate in the detection of metastases than CT score was.

The role of some inflammatory markers, cytokins and tumor markers in diagnosis of endometriosis

Endometriosis is a multifactorial disease which etiopathogenesis has not been elucidated. One of the theories of etiopathogenesis is the inflammatory theory. Aims of the study: To develop a practical non-invasive test for the diagnosis of endometriosis by examining some inflammatory markers and cytokines; to compare the highly sensitive C-reactive protein (hsCRP), cytokines (interleukin-6-IL-6 and tumor necrotizing factor alpha) and the tumor marker cancer antigen 125 (CA-125) among healthy patients and patients with endometriosis; to determine the sensitivity and specificity of each biomarker separately in the diagnosis of endometriosis and to determine their role in the diagnosis of endometriosis. Materials and methods: In a prospective study conducted at the University Clinic for Gynecology and Obstetrics, Ss. Cyril and Methodius University in Skopje, North Macedonia 138 patients were included of a reproductive age between 18-50 years (83 with diagnosis endometriosis operated laparoscopically or with laparotomy) and a control group of 55 healthy women, in a period between 01.09.2018 to 01.05.2021. Serum levels of IL-6, TNF-α, hs-CRP and tumor marker CA-125 were evaluated in both groups. Results: Serum levels of CA-125, IL-6 and TNF-α and hs-CRP were significantly higher in patients with endometriosis compared to the control group. The surface under the ROC curve (AUC) for IL-6, CA-125, hs-CRP, and TNF-α has shown that as individual markers they all have a discriminatory capacity to diagnose patients with endometriosis. Conclusions: Results obtained in our study showed statistically significantly higher serum concentrations of CA-125, IL-6 and TNF-α and hs-CRP in patients with endometriosis compared to the control group of patients. However, none of these biomarkers showed a high sensitivity for diagnosis of endometriosis. It is necessary to find a panel combination of biomarkers with a high sensitivity of about 100% that will enable early diagnosis of endometriosis.

Cancer Antigen 125 Serum Level in Head and Neck Diffuse Large B-Cell Lymphoma

Background : Diffuse Large B-Cell Lymphoma (DLBCL) is the most common subtype of the Non-Hodgkin Lymphoma (LNH). Until now, lactate dehydrogenase (LDH) is the only tumor marker to assess DLBCL progression; however, increased LDH is a relatively non-specific biomarker. Cancer antigen 125 (CA-125) serum level have been used as a tumor marker in ovarian cancer. The aim of this study was to explore the possible role of CA-125 serum level as a tumor marker in head and neck DLBCL. Methods : This was an observational descriptive study among consecutively sampled DLBCL patients. CA-125 serum level examination was carried out (ADVIA Centaur CA-125II) and described along with the clinical characteristics of DLBCL patients. Results : DLBCL was mostly observed in males (54.05%), most often in the 55-65 year age group (51.3%), with stage 1 DLBCL was the most prevalent (71.9%). The mean CA-125 serum level was 22.9 U/ml and increased in patients with advanced DLBCL. Conclusions : Increased CA-125 serum level in DLBCL, especially at advanced stages, suggests that CA-125 serum level may be of benefit as a tumor marker in the head and neck DLBCL. Further study is in need to explore the role of CA-125. 1. Kementerian Kesehatan Republik Indonesia. Data dan kondisi penyakit limfoma di Indonesia. InfoDatin Pusat Data dan Informasi Kementerian Kesehatan RI. 2015 [cited 2020 March 18] Available from: https://www.kemkes.go.id/resources/download/pusdatin/infodatin/infodatin-limfoma.pdf 2. Dwianingsih EK, Indrawati, Hardianti MS, Malueka RG , Iswar RR, Sutapa S, et al. Histopathological features of lymphoma in Yogyakarta, Indonesia. Asian Pac J Cancer Prev. 2016;17(9):4213–16. 3. Badan Penelitian dan Pengembangan Kesehatan Kementerian Kesehatan RI. Riset Kesehatan Dasar (RISKESDAS) 2013. Jakarta: Badan Penelitian dan Pengembangan Kesehatan Kementerian Kesehatan RI; 2013 4. Cheson BD, Fisher RI, Barrington SF, Cavalli F, Schwartz LH, Zucca E, et al. Recommendations for initial evaluation, staging, and response assessment of Hodgkin and non-Hodgkin lymphoma: the Lugano classification. J Clin Oncol. 2014; 32(27):3059–67. 5. Ziepert M, Hasenclever D, Kuhnt E, Glass B, Schmitz N, Pfreundschuh, et al. Standard International prognostic index remains a valid predictor of outcome for patients with aggressive CD20+B-cell lymphoma in the rituximab era. J Clin Oncol. 2010;28(14):2373-2380. 6. Gutiérrez A, Martínez-Serra J, Barceló B, Sampol A, Vinas L, Gonzales G, et al. Prognostic value of serum CA125 levels in diffuse large B-cell lymphoma: potential role of a new sex and age adjusted reference value. Int J Lab Hematol. 2010; 32(6 Pt 2): 582–9. 7. Dilek I, Ayakta H, Demir C, Meral C, Ozturk M. CA 125 levels in patients with Non-Hodgkin lymphoma and other hematologic malignancies. Clin Lab Haematol. 2005;27(1):51–5. 8. Memar B, Aledavood A, Shahidsales S, Ahadi M, Farzadnia, Raziee HR, et al. The prognostic role of tumor marker CA-125 in B-Cell non-Hodgkin’s Lymphoma. Iran J Cancer Prev. 2015;8(1):42–6. 9. Garg S, Goyal B. Evaluation of CA-125 as a prognostic marker in patients with Non-Hodgkin’s lymphoma. International Journal of Medical and Health Research. 2017;3(4):13–5. 10. Paoli CJ, Bach BA, Quach D, Tsai KT, Wong B, Kallich J. Performance status of real-world oncology patients before and after first course of chemotherapy. The Journal of Community and Supportive Oncology. 2014; 12(5):163–70. 11. Yadav C, Ahmad A, D’Souza B, Agarwal A, Nandini M, Prabhu KA, et al. Serum lactate dehydrogenase in Non-Hodgkin’s lymphoma: a prognostic indicator. Indian J Clin Biochem. 2016;31(2):240–2.

Gene Variants That Affect Levels of Circulating Tumor Markers Increase Identification of Patients With Pancreatic Cancer

Levels of carcinoembryonic antigen (CEA), carbohydrate antigen 19-9 (CA19-9), and cancer antigen 125 (CA-125) in blood are used as markers to determine the response of patients with cancer to therapy, but are not used to identify patients with pancreatic cancer. We obtained blood samples from 504 patients undergoing pancreatic surveillance from 2002 through 2018 who did not develop pancreatic cancer and measured levels of the tumor markers CA19-9, CEA, CA-125, and thrombospondin-2. Single-nucleotide polymorphisms (SNPs) in FUT3, FUT2, ABO, and GAL3ST2 that have been associated with levels of tumor markers were used to establish SNP-defined ranges for each tumor marker. We also tested the association between additional SNPs (in FUT6, MUC16, B3GNT3, FAM3B, and THBS2) with levels of tumor markers. To calculate the diagnostic specificity of each SNP-defined range, we assigned the patients under surveillance into training and validation sets. After determining the SNP-defined ranges, we determined the sensitivity of SNP-adjusted tests for the tumor markers, measuring levels in blood samples from 245 patients who underwent resection for pancreatic ductal adenocarcinoma (PDAC) from 2010 through2017. A level of CA19-9 that identified patients with PDAC with 99% specificity had 52.7% sensitivity. When we set the cut-off levels of CA19-9 based on each SNP, the test for CA19-9 identified patients with PDAC with 60.8% sensitivity and 98.8% specificity. Among patients with FUT3 alleles that encode a functional protein, levels of CA19-9 greater than the SNP-determined cut-off values identified 66.4% of patients with PDAC, with 99.3% specificity. In the validation set, levels of CEA varied among patients with vs without SNP in FUT2, by blood group, and among smokers vs nonsmokers; levels of CA-125 varied among patients with vs without the SNP in GAL3ST2. The use of the SNPs to define the ranges of CEA and CA-125 did not significantly increase the diagnostic accuracy of the assays for these proteins. Combining data on levels of CA19-9 and CEA, CA19-9 and CA-125, or CA19-9 and thrombospondin-2 increased the sensitivity of detection of PDAC, but slightly reduced specificity. Including information on SNPs associated with levels of CA19-9, CEA, and CA-125 can improve the diagnostic accuracy of assays for these tumor markers in the identification of patients with PDAC. Clinicaltrials.gov no: NCT02000089.

Application of PETCT imaging information combined with tumor markers in etiological screening of infectious and non-infectious ascites

In order to study the application value of PETCT image information combined with tumor markers in etiological screening of infectious and non-infectious ascites, ascites patients with unexplained etiological factors from the The Affiliated Hospital, Southwest Medical University were selected as the research objects, who were submitted to PET/CT scans and CT morphological scans for the semi-quantitative analysis of ascitic focus; in addition, the research objects were also submitted to chemiluminescence for the detection of concentrations of tumor markers in ascitic fluid, including carcinoembryonic antigen (CEA), alpha fetal protein (AFP), cancer antigen 125 (CA125), and carbohydrate antigen 19-9 (CA19-9). The results have shown that among the tumor markers CEA, AFP, CA125, and CA19-9, the tumor markers CEA, AFP, and CA19-9 had diagnostic reliability; in addition, compared with pure PET/CT imaging and ascites tumor marker detection, the combination of PET/CT imaging and tumor marker detection has more diagnostic value in infectious and non-infectious ascites etiology screening. Despite the deficiencies in the research process, it has provided a certain basis and ideas for subsequent research.

Cancer Antigen 125 (CA125), Human Epididymis Protein 4 (HE4), Risk of Malignancy Index (RMI), and Risk of Ovarian Malignancy Algorithm (ROMA) as Diagnostic Tests in Ovarian Cancer

Background: Distinguishing between malignant and benign ovarian masses is necessary to refer patients to centers with experience in the surgical. Objectives: The aim of this study was to analyze the diagnostic value of the tumor markers, including risk of malignancy index (RMI), human epididymis protein 4 (HE4), cancer antigen125 (CA125), and risk of ovarian malignancy algorithm (ROMA) in ovarian mass. Methods: One hundred patients with ovarian masses were assessed for the tumor markers ROMA, HE4, RMI, and CA125. The sensitivity and specificity of each parameter were calculated, using receiver-operating characteristic curves (ROCs) according to the area under the curve (AUC) for each method. Results: The median CA125, HE4, RMI, and ROMA serum levels had significant difference between malignant and benign masses in the overall assessment (P < 0.001). The AUCs were 0.83 (CA125), 0.88 (HE4), 0.85 (RMI), and 0.92 (ROMA) for benign vs. malignant masses in all the patients. The comparison of ROC curves was carried out, using a pairwise comparison method, and no differences were found among 4 methods. Conclusions: The results based on the AUC markers of CA125, HE4, RMI, and ROMA revealed that the accuracy trend of ROMA was higher than that of CA125, HE4, and RMI in all the patients and each group of pre- and post-menopausal patients.

A Survey on the Role of CA125, HE4, ROMA, and RMI in Pelvic Mass

Context: Pelvic masses are a prevalent cause for referral to gynecologic oncology departments to evaluate the possibility of benign or malignant conditions. Pelvic mass often was found in pelvic examinations among females with ovarian. Tumor markers are advantageous biomarker in tumor diagnosis. Evidence Acquisition: We performed a computerized search in Medline/PubMed databases and Google Scholar with key words: “Cancer antigen 125 (CA125), Human epididymis protein 4 (HE4), risk of ovarian malignancy algorithm (ROMA), Risk of malignancy index (RMI), and Pelvic mass”. Results: The usage of tumor marker CA125 alone is associated with serious limitations like low sensitivity for early or stage I disease and lack of specificity especially in pre-menopausal women. Serum HE4 is a good biomarker for discriminating ovarian cancer from benign pelvic disease, but could be affected by several factors including pregnancy, age, and smoking. ROMA has a high sensitivity, specificity, and negative predictive value to predict the presence of ovarian cancer in women with a pelvic mass. RMI could differentiate between benign and malignant pelvic masses, but RMI expression was higher in women with 55 years or more. Conclusions: According to the results of this study, combination of these biomarkers or at least 2 or 3 biomarkers are suggested for early stage diagnosis of pelvic mass with high sensitivity and specificity.

The diagnostic value of serum tumor markers CEA, CA19-9, CA125, CA15-3, and TPS in metastatic breast cancer

This study aims to understand the diagnostic value of serum tumor markers carcinoembryonic antigen (CEA), cancer antigen 19-9 (CA19-9), cancer antigen 125 (CA125), cancer antigen 15-3 (CA15-3), and tissue polypeptide-specific antigen (TPS) in metastatic breast cancer (MBC). A total of 164 metastatic breast cancer patients in Shanxi Cancer Hospital were recruited between February 2016 and July 2016. 200 breast cancer patients without metastasis in the same period were randomly selected as the control group. The general characteristics, immunohistochemical, and pathological results were investigated between the two groups, and tumor markers were determined. There were statistical differences in the concentration and the positive rates of CEA, CA19-9, CA125, CA15-3, and TPS between the MBC and control group (P<0.05). The highest sensitivity was in CEA and the highest specificity was in CA125 for the diagnosis of MBC when using a single tumor marker at 56.7% and 97.0%, respectively. In addition, two tumor markers were used for the diagnosis of MBC and the CEA and TPS combination had the highest diagnostic sensitivity with 78.7%, while the CA15-3 and CA125 combination had the highest specificity of 91.5%. Analysis of tumor markers of 164 MBC found that there were statistical differences in the positive rates of CEA and CA15-3 between bone metastases and other metastases (χ2=6.00, P=0.014; χ2=7.32, P=0.007, respectively). The sensitivity and specificity values of the CEA and CA15-3 combination in the diagnosis of bone metastases were 77.1% and 45.8%, respectively. The positive rate of TPS in the lung metastases group was lower than in other metastases (χ2=8.06, P=0.005).There were significant differences in the positive rates of CA15-3 and TPS between liver metastases and other metastases (χ2=15.42, P<0.001; χ2=9.72, P=0.002, respectively). The sensitivity and specificity of the CA15-3 and TPS combination in the diagnosis of liver metastases were 92.3% and 45.6%, respectively, and the positive rate of CEA in triple-negative metastatic breast cancer is lower than in other subtypes (χ2=4.80, P=0.028). Therefore, serum CEA, CA19-9, CA125, CA15-3, and TPS can be used in the diagnosis of MBC, and different combinations of tumor markers have varying diagnostic value.

Respective and simultaneous detection tumor markers CA125 and STIP1 using aptamer-based fluorescent and RLS sensors

Here we reported a method for the early diagnosis of ovarian cancer that is respective and simultaneous detection of tumour marker cancer antigen 125 (CA125) and stress-induced phosphoprotein 1 (STIP1) using aptamer-based fluorescent and RLS sensors. The fluorescent sensor was fabricated by Carboxyfluorescein (FAM)-labelled CA125 aptamer and cyanine-5-modified STIP1 aptamer onto the surface of RGO, thereby quenching the fluorescence of fluorophores. When STIP1 was introduced, the fluorescence recovered. When CA125 was added, the specific binding of aptamer and CA125 triggered the release of the FAM-labeled CA125 aptamer under the effect of formaldehyde, and adsorbed on the surface of RGO which lead to fluorescence quenching of FAM. This fluorescence signals change could be used to detect CA125 and STIP1 with the lowest detectable concentration down to 0.05UmL−1 and 1ngmL−1 respectively. The RLS sensor was fabricated by methyl violet interact with dsDNA which is obtained by CA125 aptamer hybridized to STIP1 aptamer. The dependence of RLS intensity on targets amount was successfully utilized for simultaneous detection of CA125 and STIP1, which provide robust evidences for the presence of ovarian cancer in the early stage. This strategy is reliable, sensitive, and may form the basis for rapid screening of ovarian cancer.

Systemic sclerosis complicated with malignant pleural effusion with high serum CA-125 tumor marker

The malignant pleural effusion in systemic sclerosis (SSc) is an uncommon condition than its common manifestation like interstitial lung fibrosis, pulmonary hypertension, and lung malignancy. We reported here a case of malignant pleural effusion in a 40-year-old female suffering from SSc with high serum tumor marker cancer antigen-125 (CA-125). Computed tomogram guided fine needle aspiration cytology from the lung nodule revealed adenocarcinoma lung. The frequency or reasons of an elevated level of a serum or pleural fluid CA-125 in this case are unclear. Excepting ovarian and lung malignancy, increased CA-125 level in serum, and pleural fluid is also detectable in nonmalignant conditions including SSc as a part of serositis. We emphasized here the malignant potential of SSc and the need for long-term follow-up to detect underlying malignancy. High CA-125 level might be interpreted cautiously.

Diagnostic and prognostic evaluation of fluorodeoxyglucose positron emission tomography/computed tomography and its correlation with serum cancer antigen-125 (CA125) in a large cohort of ovarian cancer patients.

We evaluated the efficacy of 18F-fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) in recurrent disease, response to therapy, and long-term follow-up of ovarian cancer (OC) patients in relation to cancer antigen-125 (CA125) levels and the prognostic meaning of this modality in this subset of subjects. Between 2005 and 2015, we retrospectively evaluated 125 patients affected by OC who underwent FDG PET/CT imaging at our institution. The indications for PET/CT were recurrence of disease in 78 patients, therapy response assessment in 29, and follow-up in 18. The results of FDG PET/CT were compared with those of histopathology and clinical and radiological progression during follow-up for at least 6 months. The median long-term follow-up was 33 months. The diagnostic accuracies for the different clinical settings were evaluated. The relationships among global survival (GS), FDG PET/CT results, and CA125 levels were evaluated by both Kaplan-Meier and Cox regression analysis. CA125 results were positive (>35 UI/mL) in 62 patients and negative in 63 (49% vs. 51%). The sensitivity and specificity of CA125 were 72% and 91%, respectively. PET/CT imaging showed a sensitivity of 98.6% and a specificity of 77.8% for the assessment of recurrent disease, and a sensitivity of 72.7% and a specificity of 88.9% for therapy evaluation. Meanwhile, in 18 patients evaluated during follow-up, the specificity was 82.3%. GS was significantly higher in case of negative CA125 values at the time of FDG PET/CT, of a negative PET/CT scan and when no evidence of peritoneum recurrence and distant metastases was determined by PET. Multivariate regression analysis showed that only age and peritoneum recurrence as determined by PET were identified as independent predictors of poor prognosis. Metabolic imaging with FDG PET/CT proved useful in patients where OC recurrence was suspected, even when the value of tumor marker CA125 was in a normal range. A positive PET/CT scan and the presence of peritoneum recurrence at PET were associated with a poor prognosis after approximately 30 months.

Usefulness of Tumor Marker CA-125 Serum Levels for the Follow-Up of Therapeutic Responses in Tuberculosis Patients with and without Serositis

The aim of this study was to determine the usefulness of cancer antigen 125 (CA-125) serum levels in patients with tuberculosis (TB) with and without tuberculous serositis. A total of 64 TB patients with a mean age of 58.17 ± 19.05 years were enrolled in this observational case series study. All patients underwent blood sampling for the measurement of CA-125 serum levels before treatment. If the CA-125 serum levels were found to be elevated, the patients underwent blood sampling in the initial treatment phase, continuation treatment phase, and every 6 months thereafter for 2 years. The treatment outcomes of the pulmonary TB group were evaluated using chest radiography and sputum examinations, and those of the tuberculous serositis group were evaluated on the basis of the amounts of fluid determined by ultrasound. All patients in the tuberculous serositis group and 45% of the patients in the pulmonary TB group had elevated CA-125 serum levels before treatment. The pretreatment mean CA-125 serum level was significantly higher in the tuberculous serositis group than in the pulmonary TB group. CA-125 serum levels decreased along with improvement in anti-TB treatment outcomes in both the groups. In conclusion, the CA-125 serum levels in combination with clinical responses, chest radiography, and sputum examinations, can offer better monitoring of therapeutic responses in anti-TB treatment.

The value of serum tumor marker CA125 and CEA in the diagonosis of non-small cell lung cancer.

Tumor marker cancer antigen 125(CA125) and carcinoembryonic antigen (CEA) all are the tumor markers found early. It was reported that the positive rate of CEA was highly in adenocarcinoma, after being analyzed all the case reports of non-small cell lung cancer (NSCLC) in recent 3 years, it was found that positive rate of CA125 was much higher in NSCLC than that of literatures. So, it's necessary to evaluate the value of serum CA125 and CEA measurement for NSCLC. The level of CA125 and CEA were detected with chemiluminescence in 136 NSCLC patients, 42 patients with respiratory diseases and 50 cases of normal control. The levels of serum CA125 in NSCLC patients were significantly higher than that of patients with respiratory diseases and normal control (except mixed cell lung cancer) (P<0.0001). The levels of serum CEA in adenocarcinoma and squamous patients were significantly higher than that of patients with respiratory diseases and normal control(P<0.0001). No difference between patients with respiratory diseases and normal control. The positive rates of CA125 were 92.3% in large-cell lung cancers, 80.2% in adenocarcinoma, 54.8% in squamous cancer, 50% in mixed cell lung cancer, respectively. The positive rates of CEA were 67.4% in large-cell lung cancers, 25.8% in squamous cancer, 0 in adenocarcinoma and mixed cell lung cancer, respectively. Combined measurement of CA125 and CEA positive rates was higher only in adenocarcinoma. The positive rates of CA125 and CEA were 86.9%and 63.6% in advanced NSCLC, respectively. The positive rates of CA125 were 90.9% in advanced adenocarcinoma. The positive rates of CA125 is higher than that of CEA in NSCLC patients, especially in large-cell lung cancers and advanced adenocarcinoma. CA125 is more useful than CEA in diagnosis of NSCLC.

Determination of tumor marker CA125 by capillary electrophoretic enzyme immunoassay with electrochemical detection

A novel capillary electrophoretic enzyme immunoassay with electrochemical detection (CE-EIA-ED) was developed for a tumor marker cancer antigen 125 (CA125). In this method, after the noncompetitive enzyme immunoreaction, the free enzyme (horseradish peroxidase)-labeled anti-CA125 antibody (Ab ∗) and the bound enzyme-labeled complex (Ag–Ab ∗) were separated in a separation capillary and then catalyzed the enzyme substrate (3,3,5,5-tetramethyl-benzidine dihydrochloride, TMB(Red)) and H 2O 2 in a reaction capillary following the separation capillary. The product of the enzymatic catalysis reaction (TMB(Ox)) was amperometrically detected on a carbon fiber microdisk bundle electrode. A activity concentration limit of detection (LOD) of 0.29 U/ml, which corresponded to a activity LOD of 1.6 μU was achieved. The assay could be used to determine CA125 in human serums from ovary tumor patents.