Objective The article introduces the present status of the application of comparative proteomics in study of tumor marker. Methods This essay review the present status and advances of the application of comparative proteomics in study of tumor marker through refer considerable literatures about proteome, proteomics and tumor marker. Results Follow the study of human genome deepening; the paradox between the finiteness of genes’ number and stability of genes’ structure and the variety of the life phenomena is more conspicuous. Then, the study of proteomics was pushed to the advancing front of life science research. The application of comparative proteomics to tumor research becomes a hot spot nowadays. Conclusion Screening tumor marker via comparative proteomics is an extremely promising research.
To study the expressions of CA19-9 and CA125 and their clinicopathologic significancesin gallbladder adenocarcinoma , pericancerous tissues and chronic cholecystitis. Methods EnVisionTM immunohistochemist ry was used for assaying the expressive levels of CA1929 and CA125 in the routinely paraffin2embedded sections of specimens f rom gallbladder adenocarcinoma ( n = 108) , pericancerous tissues ( n = 46) , and chronic cholecystitis ( n = 35) . Results The positive rates of CA19-9 and CA125 were significantly higher in gallbladder adenocarcinoma ( 49. 1 % , 51. 9 %) than those in pericancerous tissues ( 26. 1 % , 15. 2 %) and chronic cholecystitis(14. 3 % , 5. 7 %) , respectively ( Plt; 0. 01) . The positive rates of CA19-9 and CA125 were significantly lower in thecases of adenomatous canceration , maximal diameter lt; 2 cm , no-metastasis of lymph node and no-invasion of regional tissues than those in the ones of low-differentiated adenocarcinoma , maximal diameter ≥2 cm , metastasis oflymph node and invasion of regional tissues ( Plt; 0. 05 , Plt; 0. 01 ) . The consistence of CA19-9 and CA125 expressivelevels was found in gallbladder adenocarcinoma (χ2 = 44. 69 , Plt; 0. 01) . Conclusion The expressions of CA19-9 andCA125 may be important tumor markers to reflect the carcinogenesis , progression , biological behaviors and prognosis of gallbladder adenocarcinoma.
Objective Toa nalyzed ifferentialp roteine xpressiono fc holangiocarcinomai np eripheralb loodb yproteomics technology, and to investigate the significance of proteomics technology in early diagnosis of bile ductmalignancy.M ethods Serum proteinf rom 58p atientsw ithc holangiocarcinomaa nd5 8c ontrols( 20p atientsw ithcholecystolithiasis and 38 healthy people) were detected by surface enhanced laser desorption/ionization-time offlight-mass spectrometry (SELDI-TOF-MS). Ciphergen protein chip software was used to identify proteinic spectra.R esults Comparedw itht hes pectrao fs erum proteini nc ontrolg roup,t herew ere1 0d ifferentiallye xpressedproteins in bile duct carcinoma group, among which three proteins with relative molecular masses of 5. 900 X 10’，9.08 0X 1 0’a nd1 1.86 3X 1 0’w ereu p-regulated( Plt;1 0-’)ands evenp roteinsw ithr elativem olecularm asseso f6.9 59X 1 0’，14.0 00X 1 0’，14.1 29X 1 0’，14.3 02X 1 0’，17.5 57X 10’，17.6 90X 1 0’a nd2 8.5 52X 1 0’w ered ownregulated(Plt; 10-’)。The average concentration of protein with the relative molecular mass of 11. 863 X 10’ incholangiocarcinoma group was eight times more than that in controls group. At the stage I of cholangiocarcinoma,thee xpressiono fp roteinp ointw itha r elativem olecularm asso f5 .90 0X1 0’w ass ignificantlyh ighert hant hosep atientsat the stage III and stage fV (Plt;10-’)，while there were no statistical difference of expression between diffeent clinical stages for the other 9 proteins points. And there were no significant expression differences of the above10 proteins between the patients with and without jaundice following cholangiocarcinoma. Instead, another threeproteinsw ithr elativem olecularm asseso f7 .25 5X 1 03，12.36 4X 1 0’a nd1 5.8 73X 1 03w ered etectedt oh aved ifferentproteine xpressions.A nda llo fth em showedh ighe xpressionsin j aundiceg roup( Plt;10-5).C onclusion Thereare remarkable differences of the expressions of serum proteins in peripheral blood in patients with cholangiocarcinoma.T hep roteinp ointw itha r elativem olecularm asso f1 1.86 3X 1 0’m ayb ea p otentialb iomarkerfo re arlyd iagnosisof cholangiocarcinoma
Objective To summarize the research progress of microRNA （miRNA） as a tumor marker in peripheral blood. Methods The domestic and international published literatures about circulating miRNA as a tumor marker in recent years were reviewed. Results The miRNA expression has universality，stability and specificity，and it is related to the occurrence and development of viarous diseases. Conclusion Circulating miRNA shows a broad application prospect in clinical diagnosis， treatment， and prognosis of tumor and other diseases.
Objective To investigate the diagnostic value of tumor marker combining the probability of malignancy model in pulmonary nodules. Methods A total of 117 patients with pulmonary nodules diagnosed between January 2013 and January 2016 were retrospectively analyzed. Seventy-six cases of the patients diagnosed with cancer were selected as a lung cancer group. Forty-one cases of the patients diagnosed with benign lesions were selected as a benign group. Tumor markers were detected and the probability of malignancy were calculated. Results The positive rate of carcinoembryonic antigen (CEA), cancer antigen 125 (CA125), neuron-specific enolase (NSE), cytokeratin marker (CYFRA21-1), and the probability of malignancy in the lung caner group were significantly higher than those of the benign group. The sensitivity, specificity, and accuracy of CEA, CA125, NSE, CYFRA21-1 combined detection were 72.37%, 73.17%, and 72.65%, respectively. Using the probability of malignancy model to calculate each pulmonary nodules, the area under ROC curve was 0.743 which was higher than 0.7; and 28.5% was selected as cut-off value based on clinical practice and ROC curve. The sensitivity, specificity, and accuracy of the probability of malignancy model were 63.16%, 78.05%, and 68.68%, respectively. The sensitivity, specificity, and accuracy of tumor marker combining the probability of malignancy model were 93.42%, 68.29%, and 92.31%, respectively. The sensitivity and accuracy of tumor marker combining the probability of malignancy model were significantly improved compared with tumor markers or the probability of malignancy model single detection (P<0.01). Conclusion The tumor marker combining the probability of malignancy model can improve the sensitivity and accuracy in diagnosis of pulmonary nodules.
ObjectiveTo summarize the relationship between microRNAs (miRNAs) and the digestive tract cancer, and to investigate the applicative value of miRNAs in the diagnosis, treatment, and prognosis evaluation of the digestive tract cancer. MethodsDomestic and international papers focusing on the relationship between miRNAs and the digestive tract cancer were retrieved and reviewed. ResultsmiRNAs participated in cell proliferation, differentiation, and apoptosis through gene regulation. The patients with digestive tract cancer were often accompanied with some abnormal expression of miRNAs in circulation, that was closely related to the occurrence and development of tumor. These miRNAs in blood contributed to not only the diagnosis of tumor, but also identification of the primary tumor site, even the clinical and pathological staging. Thus, we could predict the progress, recurrence, and the metastasis of tumor, or perform the evaluation of therapeutic effects. ConclusionCirculating miRNAs can be used as molecular microsensors for the noninvasive early diagnosis, treatment, and prognosis of the digestive tract cancer.
Objective To develop and assess the performance of a predictive model for the infiltration degree of solitary pulmonary pure ground-glass nodules (pGGN) using CT, blood cell parameters, and tumor markers. Methods The clinical data of patients with solitary pulmonary pGGN, collected from Tangshan Gongren Hospital between June 2021 and April 2024, were analyzed. They were divided into a training set and a validation set in a 7 : 3 ratio. Least absolute shrinkage and selection operator (LASSO)-logistic regression was used to identify risk factors for invasive adenocarcinoma and construct the model. The model's performance was assessed using receiver operating characteristic (ROC) curves, calibration curves, mean absolute error (MAE), mean squared error (MSE), and accuracy. Results The study included 528 patients (265 males, 263 females) with a median age of 54 years (interquartile range: 45-59 years). LASSO-logistic regression identified increased diameter, vascular convergence sign, pleural indentation sign, elevated mean CT value, and elevated carcinoembryonic antigen levels as independent risk factors for solitary pulmonary pGGN infiltration. In contrast, a rounded or similarly rounded shape and an elevated platelet to lymphocyte ratio (PLR) were independent protective factors (P<0.05). In the training set, the area under the ROC curve of model Z (comprising diameter, vascular convergence sign, pleural indentation sign, rounded or similarly rounded, mean CT value, carcinoembryonic antigen, and PLR) was 0.875, which was greater than that of model C (comprising diameter, vascular convergence sign, pleural indentation sign, rounded or similarly rounded, and mean CT value; 0.852) and model S (comprising carcinoembryonic antigen and PLR; 0.753). The MAE, MSE, and accuracy of model Z were 0.035, 0.003, and 0.808, respectively, which were lower than those of model C (0.058, 0.006, and 0.827) and higher than those of model S (0.031, 0.001, and 0.648). In the validation set, the area under the ROC curve, MAE, MSE, and accuracy of model Z were 0.829, 0.051, 0.004, and 0.755, respectively, which were higher than those of model C (0.780, 0.038, 0.002, and 0.730) and model S (0.740, 0.042, 0.002, and 0.692). Conclusion The model constructed from diameter, vascular convergence sign, pleural indentation sign, rounded or similarly rounded shapes, mean CT value, carcinoembryonic antigen, and PLR aids in assessing the infiltration degree of pulmonary pGGN, with superior performance compared to models based solely on CT or those based on tumor markers combined with blood cell parameters.
Objective To investigate the value of tumor type M2 pyruvate kinase ( M2-PK) in the differential diagnosis of pleural effusion. Methods A total of 146 patients with pleural effusion during January 2006 to December 2008 were recruited at the department of respiratory medicine of the Shantou Affiliated Hospital and the First Affiliated Hospital of Sun Yat-sen Medical College. Pleural effusion was malignant in 72 cases ( 52 cases with lung cancer and 20 cases with metastatic lung cancer) and benign in 74 cases ( 54 cases with infective pleural effusion and 20 with transudation effusion) . The patients were divided into a malignant pleural effusion group, an infective pleural effusion group, and a transudation group.Then the infective group was further divided into subgroups of tuberculosis pleural effusion group andparapneumonic effusion group. The concentration of tumor M2-PK in pleural fluid obtained during the first thoracocentesis was measured by enzyme-linked immunosorbent assay( ELISA) . Results The concentration of tumor M2-PK was significantly higher in the malignant pleural effusion group compared with the benignpleural effusion groups ( P lt; 0. 01) . Significant differences were also found in the concentration of tumor M2-PK between malignant pleural effusion caused by lung cancer and metastatic lung cancer( P lt; 0. 05) .When the cutoff value of tumor M2-PK was set at 18. 68 U/mL, the sensitivity, specificity, and accuracy for the diagnosis of malignant pleural effusion was 87. 6% , 86. 0% , and 87. 4%, respectively. Furthermore,the detection of tumor M2-PK in combination with CEA showed better diagnostic sensitivity( 96. 0% ) ,specificity ( 85. 0% ) , and accuracy ( 91. 1% ) . Conclusions The detection of tumor M2-PK in pleural effusion is of some clinical significance in the differential diagnosis of benign and malignant pleural effusion.The detection of tumor M2-PK in combination with CEA is a good diagnostic tool with high sensitivity andspecificity.
ObjectiveTo explore clinical strategies of early diagnosis and treatment of solitary pulmonary nodules (SPN), and define the importance of biological tumor markers, preoperative CT-guided localization with the combination of methylene blue and hookwire system, and video-assisted thoracoscopic surgery (VATS)for early diagnosis and treatment of SPN. MethodsWe retrospectively analyzed clinical records of 70 SPN patients in Department of Thoracic Surgery of Taixing People's Hospital from January 2011 to February 2014. There were 33 male and 37 female patients with their age of 32-87 (59.74±2.04)years. Preoperatively, patients' medical history, heart, lung, liver and kidney function, sputum cytology and bronchoscopic biopsy results were combined with biological tumor markers to make a preliminary differential diagnosis between benign or malignant SPN and surgical risk evaluation. For SPN less than 1 cm or too small for accurate intraoperative localization, CT-guided localization with the combination of methylene blue and hookwire system was routinely performed half an hour before the operation. For SPN large enough for accurate intraoperative localization, wedge resection of SPN and surrounding lung tissue was directly performed with VATS. Intraoperative frozen-section examination of resected lung specimens was preformed. If the pathological diagnosis was malignant, conventional VATS lobectomy/segmentectomy and lymphadenectomy were performed. If the pathological diagnosis was benign, the operation was then completed. Long-term follow-up was performed for SPN patients, especially patients with early-stage lung cancer. ResultsThere was no in-hospital death or postoperative bronchopleural fistula in this study. Postoperatively, there were 2 patients with pneumonia, 3 patients with pneumothorax and 1 patient with wound infection, who were all cured or improved after proper treatment. Among the 70 patients, 11 patients acquired pathological diagnosis via preoperative lung needle biopsy. Among the other 59 patients, 12 patients with eccentric SPN acquired pathological diagnosis via intraoperative biopsy, and 47 patients underwent SPN resection with VATS. Pathological diagnosis included adenocarcinoma in 19 patients, squamous cell carcinoma in 9 patients, bronchioloalveolar carcinoma in 3 patients, adenosquamous carcinoma in 2 patients, inflammatory pseudotumor in 11 patients, tuberculoma in 4 patients, granuloma in 5 patients, sclerosing hemangioma in 2 patients, lung metastasis from breast cancer in 1 patient, lung metastasis from colon cancer in 1 patient, lung metastasis from thyroid cancer in 1 patient, and lung metastasis from stomach cancer in 1 patient. All the 70 patients (100%)were followed up for a mean duration of 2-34 months, and there was no late death during follow-up. One patient with adenocarcinoma of the right upper lobe had cerebral metastasis 18 months after operation, and had been receiving radiotherapy. All the other patients had a good quality of life. ConclusionAbove clinical strategies are accurate for early diagnosis and minimally invasive treatment of SPN with good postoperative recovery and short-term outcomes.