OBJECTIVETo prepare a monoclonal antibody against human telomeric repeat binding factor 1 (TRF1) protein and explore its biological characteristics.

METHODSBALB/c mice were immunized with GST-TRF1(33-277) fusion protein for the preparation of monoclonal antibody by hybridoma technique. The obtained antibody was used for clinical assay by Western-blot and immunohistochemical staining.

RESULTSOne strain of hybridoma was obtained. It was confirmed by Western-blot that the antibody specifically recognized the 60 kD TRF1 protein. Immunohistochemical staining of the antibody showed that TRF1 protein located in the cytoplasm of epithelial cells and bone marrow cells.

CONCLUSIONA TRF1 monoclonal antibody, with high specificity was developed. It is useful for detection of TRF1 protein in tissue specimens.

Animals ; Antibodies, Monoclonal ; immunology ; Blotting, Western ; Female ; Humans ; Hybridomas ; immunology ; Immunohistochemistry ; Mice ; Mice, Inbred BALB C ; Recombinant Fusion Proteins ; immunology ; Telomeric Repeat Binding Protein 1 ; analysis ; genetics ; immunology

OBJECTIVETo explore whether hepatitis C virus core protein (HCV C) regulates the expression of NFAT1 to participate in the progression and malignant biological behavior of intrahepatic cholangiocarcinoma cells.

METHODSThe recombinant plasmid pEGFP-N(3)-HCV C and the empty vector pEGFP-N(3) were cotransfected with enhanced green fluorescent protein (EGFP) into RBE cells using liposome. Real-time PCR and Western blotting were used to examine the expression of NFAT1 mRNA and protein in the transfected RBE cells. MTT assay was used to evaluate the changes in the cell proliferation, and the cell cycle changes were analyzed by flow cytometry.

RESULTSHCV C transfection significantly enhanced the expressions of NFAT1 mRNA and protein in RBE cells (P<0.05) and promoted the progression of cell cycle into G(2)/M phase to accelerate the cell proliferation.

CONCLUSIONTransfection with HCV C gene up-regulates NFAT1 expression and promotes the cell cycle progression and proliferation of intrahepatic cholangiocarcinoma cells, suggesting the involvement of HCV C in the progression of intrahepatic cholangiocarcinoma.

Bile Duct Neoplasms ; pathology ; Cell Cycle ; Cell Line, Tumor ; Cell Proliferation ; Cholangiocarcinoma ; pathology ; Gene Expression ; Humans ; NFATC Transcription Factors ; genetics ; Plasmids ; Transfection ; Viral Core Proteins ; genetics

Objective:To investigate the application value of paradoxical intention therapy in patients undergoing PCI.Methods:A total of 116 patients who undergoing PCI in Fuwai Center China Cardiovascular Hospital from January 2018 to December 2019 were enrolled in the present study. They were divided into experimental group and control group with 58 cases in each group. The control group received routine therapy and nursing care, while the experimental group carried out paradoxical intention therapy based on the control group. The effects were evaluated by physiological stress index (blood pressure, heart rate), Symptom Checklist-90 (SCL-90) and General Comfort Questionnaire (GCQ) respectively.Results:At 1 day before surgery, once on the operative day and 1 day after surgery, the systolic pressure were (129.58 ± 13.89), (132.08 ± 12.28), (125.58 ± 12.28) mmHg(1 mmHg=0.133 kPa) in the experimental group, significantly lower than those in the control group (137.22 ± 11.18), (138.35 ± 14.94), (132.35 ± 14.89) mmHg, the differences were statistically significant ( t=3.14, 2.38, 2.59, all P<0.05). At 1 day before surgery and once on the operative day, the heart rate were (74.17 ± 4.18), (76.39 ± 5.14) times/minutes in the experimental group, significantly lower than those in the control group (76.62 ± 5.19), (78.78 ± 6.22) times/minutes, the differences were statistically significant ( t=2.69, 2.17, both P<0.05). After 4 weeks of intervention, the scores of somatization, compulsion, anxiety, depression and total SCL-90 were (1.25 ± 0.19), (1.42 ± 0.23), (1.19 ± 0.28), (1.20 ± 0.16), (121.66 ± 9.66) points in the experimental group, significantly lower than those in the control group (1.84 ± 0.25), (1.68 ± 0.37), (1.84 ± 0.39), (1.73 ± 0.33), (146.47 ± 8.64) points, the differences were statistically significant ( t values were 4.45-14.08, all P<0.05). The scores of physiological dimension, psychological dimension and total GCQ were (10.89 ± 2.22), (24.49 ± 4.92), (77.91 ± 6.20) points in the experimental group, significantly higher than those in the control group (8.51 ± 2.27), (21.84 ± 4.61), (72.09 ± 6.66) points, the differences were statistically significant ( t=5.50, 2.89, 4.69, all P<0.05). Conclusions:Paradoxical intention therapy can effectively alleviate physiological and psychological stress and decrease postoperative discomfort of patients undergoing PCI.

Objective:To evaluate the effect and influence of exchange transfusion on neonatal ABO hemolysis by comparing the changes of indirect bilirubin in serum and internal environment before and after exchange transfusion.Methods:A retrospective analysis of 242 cases with neonatal ABO hemolytic disease from January 2017 to October 2018 in the Children's Hospital of Jiangxi Province was carried out.According to whether the parents signed or agreed to exchange transfusion, they were divided into two groups.The exchange group (126 cases) received routine treatment + exchange of blood, and the control group (116 cases) was only given conventional therapy(blue light + probiotics + gamma globulin). In the exchange group, peripheral venous blood was collected half an hour before the exchange of blood(T1) and half an hour after the exchange of blood(T2), while in the control group, the indirect bilirubin, platelet and blood sugar were measured at two time points of parents signing disapproval of exchange of blood(T1) and disapproval of exchange of blood and one day after the treatment(T2).Results:The indirect bilirubin levels in serum of the exchange group and the control group were decreased, and the difference was statistically significant[(194.010±41.065)μmol/L vs.(390.048±39.058)μmol/L, t=1507.604, (292.014±39.998)μmol/L vs.(383.452±42.820)μmol/L, t=306.820, all P<0.05]. The decrease of serum indirect bilirubin in the exchange group was more significant than that in the control group, and the difference was statistically significant.[(194.010±41.065)μmol/L vs.(292.014±39.998)μmol/L, t=368.267, P<0.05]. After exchange transfusion, the levels of platelet and blood sugar were decreased significantly, and the differences were statistically significant[(91.370±24.766)×10 9/L vs.(350.660±32.564)×10 9/L, t=5061.203, (2.965±0.593)mmol/L vs.(5.490±0.876)mmol/L, t=717.817, all P<0.05]. Decreased platelets and blood sugar could return to normal within 3 days. Conclusion:Exchange therapy can significantly reduce the level of bilirubin and the incidence of bilirubin encephalopathy in neonates with ABO hemolysis.Exchange therapy has certain effect on the internal environment of neonatal ABO hemolytic patients, which is easy to cause thrombocytopenia and blood sugar reduction.But the change of internal environment is temporary and reversible.

Objective:To explore the efficacy and safety of camrelizumab combined with apatinib as the second-line treatment for patients with advanced gastric cancer.Methods:The clinical data of 19 patients with advanced gastric cancer in Hebei General Hospital from August 2019 to March 2022 were retrospectively analyzed. All patients received camrelizumab combined with apatinib as the second-line treatment. The treatment efficacy and adverse reactions were evaluated; the survival analysis was performed using Kaplan-Meier method; Cox proportional hazards model was used to analyze the influencing factors for overall survival (OS) of patients.Results:Among 19 patients, no one achieved complete remission, 4 patients (21.1%) achieved partial remission, 9 patients (47.4%) had stable disease. The objective response rate (ORR) and disease control rate (DCR) were 21.1% (4/19) and 68.4% (13/19), respectively. The ORR of patients with deficient mismatch repair (dMMR) was higher than that of patients with proficient mismatch repair (pMMR) [100.0% (2/2) vs. 11.8% (2/17), P < 0.05], and patients with programmed death receptor ligand 1 (PD-L1) combined positive score (CPS) ≥1 had a higher DCR than patients with PD-L1 CPS < 1 [100.0% (5/5) vs. 25.0% (1/4), P < 0.05]. The median follow-up time of 19 patients was 14.7 months (12.0-17.4 months), the median progression-free survival time and OS time were 2.8 months and 5.7 months (95% CI 2.4-8.9 months). Increased lactate dehydrogenase (LDH) was negatively correlated with OS ( χ2 = 10.262, P = 0.001). Multivariate Cox regression analysis showed that LDH was an independent influencing factor for the OS of patients (<250 U/L vs. ≥250 U/L: HR = 0.149, 95% CI 0.039-0.657, P = 0.005). The most common treatment-related adverse reactions were fatigue (52.6%, 10 cases), anemia (47.4%, 9 cases), thrombocytopenia (36.8%, 7 cases), rash (36.8%, 7 cases), and reactive capillary hemangioma (36.8%, 7 cases). Conclusions:Camrelizumab combined with apatinib as the second-line treatment for advanced gastric cancer have good efficacy and safety.

Objective: To investigate the origin of infection and risk factors of a case with SARS-CoV-2 infection associated with overseas countries in the Ningbo-Zhoushan Port, Zhejiang Province, so as to provide the evidence for improving the COVID-19 control measures at ports. Methods: Ningbo Center for Disease Control and Prevention ( CDC ) and Beilun CDC conducted case finding and epidemiological surveys immediately after being informed. The general information, history of vaccination and the travel during the latest 14 days were collected from the positive case, and all close contacts were tracked. Saliva samples were collected for SARS-CoV-2 nucleic acid testing and whole-genome sequencing, and the sequencing results were aligned with the GISAID's EpiCoV database. The origin of infection and transmission route of the positive case was investigated. Results: A case was identified positive for SARS-CoV-2 nucleic acid during company M's routine screening in the Ningbo-Zhoushan Port on August 10, 2021, and was confirmed positive for SARS-CoV-2 nucleic acid by Beilun CDC and Ningbo CDC on August 11. Whole-genome sequencing showed SARS-CoV-2 B.1.617.2 ( Delta ) variant, which shared the highest homology with the virus sequence uploaded by Russia on June, 2021 ( Russia/MOW-RII-MH27356S/2021 ). The case was a bundling worker for overseas container ships, and reported communicated with foreign boatmen and contacted materials without protected interventions on the SINOKOR AKITA Container Ship between August 4 and 5, 2021. This ship anchored at Vladivostok, Russia from July 27 to 29, anchored at Ningbo Harbor on August 4, and departed on August 5. Then, 11 boatmen from this ship were tested positive for SARS-CoV-2 nucleic acid on August 8. One asymptomatic case was reported in this epidemic; 254 close contacts and 617 secondary close contacts were identified, and all were tested negative for SARS-CoV-2 nucleic acid. No new cases with SARS-CoV-2 infections were detected until August 25, 2021, and the emergency response was therefore terminated. Conclusions The infection was a sporadic COVID-19 epidemic associated with overseas countries, which was caused by Delta variant infection through contacts with foreign boatmen or materials by a bundling worker in Ningbo-Zhoushan Port; fortunately, no epidemic spread occurred. Intensified closed-loop management and increased frequency of SARS-CoV-2 nucleic acid test among high-risk populations, and improving the precision and rapid emergency treatment of COVID-19 epidemics are required for the containment of COVID-19 at ports.

Objective:To investigate the predictive value of dynamic platelet and hemagglutination-related parameters in patients with acute pancreatitis (AP).Methods:The patients admitted to the Department of Emergency Surgery in the First Affiliated Hospital of Zhengzhou University from January 2020 to December 2020 were analyzed. According to the inclusion criteria and exclusion criteria, patients with AP were retrospectively enrolled. According to the Chinese Guidelines for the Diagnosis and Treatment of Acute Pancreatitis (Shenyang, 2019), the patients were divided into two groups: severe acute pancreatitis (SAP group) and non-severe acute pancreatitis (non-SAP group) [including mild acute pancreatitis (MAP) and moderate severe acute pancreatitis (MSAP)]. A normal distribution of the maximum and mean aggregation rates of dynamic platelets (arachiidonic acid), plateletcrit (PCT) and bedside index for severity in acute pancreatitis (BISAP) scores and other measurement data were tested by t test, while measurement data of prothrombin time (PT), fibrinogen (FIB) and D-dimer that did not conform to normal distribution were tested by Mann-Whitney U test. χ 2 test was used for the counting data such as sex, age and etiology of patients in the two groups. The prognostic value of statistically significant indicators for non-SAP group and SAP group was further analyzed by receiver operating characteristic (ROC) curve. Results:A total of 146 patients with AP were enrolled, including 50 patients in SAP group and 96 in non-SAP group. The maximum and average aggregation rates of dynamic platelet (aracidonic acid) in the SAP group were (71.76±17.62) % and (67.91±18.10) %, PT (12.02±1.33) s, FIB (4.76±2.08) g/L, D-dimer (3.75±6.04) μg/L, PCT (0.23±0.08) %, and BISAP scores (1.42±1.18), which were all significantly higher than those in the non-SAP group [the maximum and average aggregation rates of dynamic platelet (arachiidonic acid) (46.65±20.11) % and (42.50±20.71) %, PT (11.50±1.51) s and FIB (3.91±1.48) g/L, D-dimer (1.00±1.37) μg/L, PCT (0.19±0.06) %, BISAP scores (0.45±0.66)] (all P<0.05). According to area under the ROC curve, the maximum and average aggregation rates of dynamic platelets (arachiidonic acid) in serum of patients with SAP were 0.83 and 0.82, respectively, and the sensitivities were 0.56 and 0.68, respectively. The specificity was 0.99 and 0.81, respectively, which was better than PT, FIB, D-dimer, PCT and BISAP scores in predicting the severity of AP. Conclusions:The maximum and average aggregation rates of dynamic platelets (arachidonic acid), PT, FIB, D-dimer, PCT and BISAP scores can be used as predictors of the severity of acute pancreatitis. The maximum and average aggregation rates of dynamic platelets (arachiidonic acid) were the best in predicting the severity of AP.

Objective:To analyze the prognostic risk factors of patients with traumatic pancreatitis (TP) and establish an early combined prediction of multiple indicators model for TP.Methods:Patients admitted to the ICU of the First Affiliated Hospital of Zhengzhou University from June 2017 to June 2022 were collected retrospectively. Based on their prognosis, the patients were divided into two groups: the good prognosis group and the poor prognosis group. The general data such as sex, age, underlying diseases, Glasgow Coma Scale (GCS), acute physiology and chronic health evaluationⅡ (APACHEⅡ), injury severity score (ISS), bedside index for severity in acute pancreatitis (BISAP), and clinical test indices such as blood routine, blood coagulation, blood gas analysis, and liver and kidney function at admission were compared between the two groups. Univariate analysis and multivariate logistic regression analysis were used to screen the early independent predictors of poor prognosis of TP, and the prediction model of TP was established by combining all of the independent indicators. The receiver operating characteristic (ROC) curve of each independent predictor and prediction model was drawn, and the area under the curve (AUC), sensitivity, specificity, and optimal cut-off value were calculated to examine the diagnostic impact of each independent predictor and the combined prediction model.Results:There were statistically significant differences in the complication rate of mental disorders, GCS, APACHE II, combined craniocerebral injury, combined chest injury, activated partial thromboplastin time, fibrin(pro)degradation products, lactate, aspartate aminotransferase, glomerular filtration rate, amylase, lipase, NT-proBNP, myoglobin, procalcitonin, ISS, and BISAP between the good and poor prognosis groups (all P<0.05). Multivariate logistic regression analysis showed that lactate ( OR=1.636, 95% CI: 1.046-2.559), lipase ( OR=1.005, 95% CI: 1.001-1.008), and ISS ( OR=1.161, 95% CI: 1.064-1.266) were independent risk factors influencing the prognosis of patients with TP. Based on the risk factors listed above, a prediction model was created: Logit P=-9.260+0.492×lactate+0.005×lipase+0.149×ISS, and the ROC curve was plotted. The AUC curve of the prediction model was 0.96 (95% CI: 0.91-1.00). Conclusions:Lactate, lipase, and ISS are early independent risk factors associated with the prognosis of TP. Their combined multi-indicator prediction model has an excellent clinical prediction effect, which can provide a clinical reference for early prediction and treatment of TP.

Objective:To investigate the predictive value of procalcitonin to platelet ratio (PPR) and C-reactive protein to albumin ratio (CAR) in severe acute pancreatitis (SAP) and the value of SAP and concomitant acute liver injury (ALI).Methods:Total of 195 patients with AP from June 2021 to December 2022 from 374 patients were screened for inclusion in the study and were divided into non-severe acute pancreatitis (NSAP) and SAP groups. The ALI group was divided into non-acute liver injury (NALI) and ALI groups according to ALI criteria, and then into hepatocellular ALI subgroup, cholangiocellular ALI subgroup and mixed ALI subgroup. Laboratory tests for procalcitonin (PCT), C-reactive protein (CRP), albumin and platelet (PLT) were completed within 48 h. Risk factors for SAP, ALI and each subgroup of ALI were analysed by binary logistic regression. Subject work characteristic (ROC) curves were plotted and the optimal thresholds for PPR and CAR were calculated. The predictive value of PPR, CAR and their combination for SAP, ALI and each type of ALI was determined.Results:The AUCs for predicting SAP by plotting ROC curves and calculating the bedside index score of acute pancreatitis severity (BISAP score), PPR, CAR, PPR combined with CAR, PPR combined with BISAP score, CAR combined with BISAP score and combined PPR, CAR and BISAP score were 0.82, 0.85, 0.79 and 0.86. The areas under the ROC curves for PPR, CAR and combined prediction of ALI were 0.81, 0.85 and 0.88, respectively; the areas under the ROC curves for PPR, CAR and combined prediction of hepatocellular ALI were 0.93, 0.77 and 0.92, respectively; and the areas under the ROC curves for PPR, CAR and combined prediction of cholangiocellular ALI were 0.76, 0.76 and 0.77, respectively. The area under the ROC curves for PPR, CAR and combined prediction of mixed ALI were 0.83, 0.76 and 0.82Conclusions:Elevated PPR and CAR are risk factors for SAP and for the development of ALI in AP. PPR has better predictive value than CAR for hepatocellular and mixed ALI, and CAR has better predictive value than PPR for cholangiocellular ALI.

This article interpretsthe expert consensus on venous catheter maintenance, including flushing and locking tube, dressing replacement and catheter maintenance, infusion connectors, catheter removal, education and training, infection control, etc. It is hoped that the expert consensus can provide a reference for clinical nurses to standardize the operations of intravenous catheter maintenance, thereby benefiting patients.