ObjectiveTo analyze the protective effect of different types of influenza vaccines (InfV) against influenza A among the individuals aged between 3‒17 years old, and to provide a scientific basis for the prevention and control of influenza in the future. MethodsA retrospective cohort study was conducted to collect data on the incidence and InfV vaccination of the individuals aged between 3‒17 years during the influenza epidemic season from 2022 to 2023. Vaccine effectiveness (VE) was calculated, and a log-binomial regression model was used to calculate the corrected VE. ResultsThe incidence rate of influenza in InfV vaccinated and un-vaccinated groups was 7.32% (1 937/ 26 446) and 9.65% (4 421/45 837), respectively. After adjusting for age and gender factors, the unadjusted VE (95%CI) was 54.57% (52.24%‒56.78%). The unadjusted VE (95%CI) was 53.66% (50.36%‒56.74%) for males and 55.60% (52.24%‒58.72%) for females, respectively. The unadjusted VE (95%CI) for the age group of 3‒ years, 6‒ years, 9‒ years, 12‒ years, and 15‒17 years were 64.08% (60.89%‒67.01%), 57.40% (53.71%‒60.80%), 57.77% (52.49%‒62.47%), 24.36% (9.49%‒36.79%), and 24.09% (-17.59%‒51.00%), respectively. The unadjusted VE (95%CI) for quadrivalent split-virion inactivated influenza vaccine, trivalent split-virion inactivated influenza vaccine, trivalent subunit influenza vaccine, and trivalent live attenuated influenza vaccine were 53.84% (51.32%‒56.24%), 62.17% (56.28%‒67.26%), 79.83% (69.94%‒86.46%), and 31.59% (19.07%‒42.18%), respectively. ConclusionThe InfV used during the 2022‒2023 influenza season had a good protective effect against influenza A among the individuals aged between 3‒17 years old, especially in those aged between 3‒11 years old.

Reducing lactate accumulation has always been a goal of the mammalian cell biotechnology industry. When animal cells are cultured in vitro, the accumulation of lactate is mainly the combined result of two metabolic pathways. On one hand, glucose generates lactate under the function of lactate dehydrogenase A (LDHA); on the other hand, lactate can be oxidized to pyruvate by LDHB or LDHC and re-enter the TCA cycle. This study comprehensively evaluated the effects of LDH manipulation on the growth, metabolism and human adenovirus (HAdV) production of human embryonic kidney 293 (HEK-293) cells, providing a theoretical basis for engineering the lactate metabolism in mammalian cells. By knocking out ldha gene and overexpression of ldhb and ldhc genes, the metabolic efficiency of HEK-293 cells was effectively improved, and HAdV production was significantly increased. Compared with the control cell, LDH manipulation promoted cell growth, reduced the accumulation of lactate and ammonia, significantly enhanced the efficiency of substrate and energy metabolism of cells, and significantly increased the HAdV production capacity of HEK-293 cells. Among these LDH manipulation measures, ldhc gene overexpression performed the best, with the maximum cell density increased by about 38.7%. The yield of lactate to glucose and ammonia to glutamine decreased by 33.8% and 63.3%, respectively; and HAdV titer increased by at least 16 times. In addition, the ATP production rate, ATP/O₂ ratio, ATP/ADP ratio and NADH content of the modified cell lines were increased to varying degrees, and the energy metabolic efficiency was significantly improved.
Animals ; Humans ; L-Lactate Dehydrogenase/genetics* ; Lactic Acid ; Adenoviruses, Human ; Ammonia ; HEK293 Cells ; Glucose/metabolism* ; Adenosine Triphosphate/metabolism* ; Kidney/metabolism* ; Mammals/metabolism*

Objective To analyze the prognosis and influencing factors of patients with acute myocardial infarction(AMI)complicated with cardiogenic shock(CS)under extracorporeal membrane oxygenation(ECMO)support.Methods Retrospective analysis of the clinical data of ECMO supported coronary angiography and percutaneous coronary intervention(PCI)treatment for AMI complicated with CS patients who visited the department of emergency medicine of the Second Hospital of Hebei Medical University from December 2018 to December 2021,including gender,age,body mass index(BMI),past history(smoking history,coronary heart disease,diabetes,hypertension,hyperlipidemia,cerebrovascular disease),acute physiological and chronic health evaluationⅡ(APACHEⅡ),vasoactive-inotropic score(VIS),the worst auxiliary examination indicators within 24 hours before ECMO[arterial lactate acid,white blood cell count(WBC),cardiac troponin I(cTnI),alanine transferase(ALT),total bilirubin(TBil),creatinine(Cr),serum potassium(K+),left ventricular ejection fraction(LVEF)],time from onset to PCI,coronary angiography results(involved anterior descending branch,circumflex branch,right coronary artery,three-vessel lesions,left main artery lesions),whether to use intra aortic-balloon counterpulsation(IABP)and continuous renal replacement therapy(CRRT).Patients were divided into survival and death groups based on the prognosis after 30 days of onset.Univariate analysis was used to compare the differences in the above indicators between the two groups with different prognoses,Logistic regression analysis was used to analyze the independent risk factors affecting the prognosis of AMI patients with CS under ECMO support coronary angiography and PCI treatment,and the receiver operator characteristic curve(ROC curve)was drawn to evaluate the predictive value of risk factors on patient prognosis.Results Out of 39 patients,21 cases(53.8%)survived and 18 cases(46.2%)died.Compared with the survival group,the VIS score,lactate acid,time from onset to PCI,involvement of the circumflex artery,three-vessel disease,and left main artery lesions significantly increased in the death group(all P＜0.05).Logistic regression analysis showed that lactate acid and three-vessel lesions were independent risk factors affecting the 30-day prognosis of AMI patients with CS[odds ratio(OR)and 95%confidence interval(95%CI)were 1.845(1.018-3.342)and 107.171(1.307-8 785.901),all P＜0.05].ROC curve analysis showed that lactate acid and three-vessel lesions has predictive value for the prognosis of AMI combined with CS patients undergoing ECMO supported coronary angiography and PCI treatment,the area under the ROC curve(AUC)were 0.756 and 0.752,95%CI were 0.601-0.911 and 0.588-0.916,P value were 0.007 and 0.008.When the cut-off value of lactic acid was 5 mmol/L,the sensitivity and specificity of predicting the prognosis of AMI combined with CS patients undergoing coronary angiography and PCI treatment were 94.1%and 57.1%,respectively.Conclusions The indications for using ECMO in critically ill patients with AMI combined with CS need to be further refined.VIS score,lactate acid,time from onset to PCI,three-vessel lesions,and left main artery lesions are risk factors for patient death.When using ECMO support for high lactate,high VIS score,and three-vessel lesions,caution should be exercised.Early ECMO support can improve the prognosis of appropriate patients by reducing lactate,reducing the use of vasoactive drugs,and shortening the time from onset to PCI.

Objective To investigate the predictive value of geriatric nutritional risk index(GNRI)for stroke-associated pneumonia in elderly patients with acute ischemic stroke(AIS).Methods A total of 1505 elderly patients with AIS admitted to Department of Neurology of the Second Affili-ated Hospital of Nanchang University from January 2017 to October 2022 were included in this retrospective study.According to GNRI nutritional assessment,they were divided into T1(high nutritional risk,GNRI＜82,n=49),T2(moderate nutritional risk,GNRI 82-91,n=305),T3(low nutritional risk,GNRI 92-98,n=555),and T4(no nutritional risk,GNRL＞98,n=596)groups.Additionally,based on the discharge diagnosis,they were further classified into pulmonary infection group(150 cases)and non-infection group(1355 cases).These subjects were also ran-domly assigned into training,validation,and testing sets in a ratio of 16∶4∶5.Multivariate logis-tic regression analysis was performed to identify the risk factors for pulmonary infection in stroke patients.Logistic regression and XGBoost algorithms were used to establish prediction models for pulmonary infection.The models were evaluated with their AUC value,accuracy,sensitivity,and specificity based on ROC curve analysis.Results Multivariate logistic regression analysis revealed that hypertension,invasive procedures,consciousness disorders,CRP,lymphocyte count,hemoglo-bin and GNRI were independent risk factors for pulmonary infection in stroke patients(P＜0.05).The AUC value of the GNRI model for predicting pulmonary infection in the testing set was 0.742(95％CI:0.651-0.833),with an accuracy of 71.8％,sensitivity of 76.7％,and specificity of 71.2％.The combined model of clinical indicators(hypertension,invasive procedures,conscious-ness disorders,CRP,lymphocyte count,hemoglobin)and GNRI achieved an AUC value of 0.776(95％CI:0.700-0.853),accuracy of 74.8％,sensitivity of 83.3％,and specificity of 73.8％in the test set.Conclusion GNRI is an independent risk factor for pulmonary infection in elderly pa-tients with AIS and has a certain value in predicting pulmonary infection after AIS.

Objective To explore the predictive efficacy of XGboost model in predicting risk of relapse and re-admission within 90 d in patients with ischemic stroke,and provide basis for early screening and prevention of high-risk population with ischemic stroke.Methods The clinical data of 6070 primary ischemic stroke patients admitted to our hospital from January 2007 to July 2017 were retrospectively collected.XGboost model and multivariate Logistic regression model were utilized to screen out the influencing factors of relapse and re-admission within 90 d in patients with ischemic stroke.A predictive model was set up.Receiver operating characteristic (ROC) curve was drawn and compared.Sensitivity,specificity and Youden index were calculated and compared to evaluate the prediction performance of XGboost model.Results During the observation period,a total of 520 patients with relapsed ischemic stroke were observed within a period of 90 d,and the incidence density was 8.57％.Multivariate Logistic regression analysis showed that length of first hospital stay,hypertension,pulmonary infection,neutrophil percentage,red blood cell distribution width (variable coefficient),and alkaline phosphatase level were independent influencing factors for re-hospitalization within 90 d of ischemic stroke,(OR=1.016,P=0.000,95％CI:1.008-1.025;OR=4.598,P=0.000,95％CI:3.717-5.687;OR=1.452,P=0.025,95％CI:1.048-2.012;OR=1.013,P=0.006,95％CI:1.004-1.022;OR=1.161,P=0.000,95％CI:1.090-1.237;OR=1.003,P=0.023,95％CI:1.000-1.005).Analysis of importance of risk factors for re-admission of ischemic stroke using XGboost model showed that the top 6 factors were hypertension,red blood cell distribution width,direct bilirubin,length of hospital stay,pulmonary infection,and alkaline phosphatase,and the corresponding importance scores were 32,20,19,18,15 and 14,respectively.ROC curve analysis results indicated that the area under the ROC for re-admission for XGboost model was 0.792 (95％CI:0.717-0.762),which was improved by 5％ as compared with that for multivariate Logistic regression model (0.739 [95％CI:0.764-0.818]).The sensitivity was 89.30％ and the Youden index was 0.444 for XGboost model,which were significantly higher than those for multivariate Logistic regression model (77.3％,0.405).Conclusions XGboost model is superior to multivariate Logistic regression model in predicting recurrence and re-admission of first ischemic stroke patients within 90 d.This model is suitable for prediction and early diagnosis of re-admission of ischemic stroke,which is of great clinical value.

A rapid and accurate determination method of lipids in microalgae plays a significant role in an efficient breeding process for high-lipid production of microalgae. Using low field nuclear magnetic resonance (LF-NMR), we developed a direct quantitative method for cellular lipids in Chlorella protothecoides cells. The LF-NMR signal had a linear relationship with the lipid content in the microalgae cells for both dry cell samples and algal broth samples (R2 > 0.99). These results indicated that we could use this method for accurate determination of microalgal lipids. Although LF-NMR is a rapid and easy lipid determination method in comparison to conventional methods, low efficiency would limit its application in high throughput screening. Therefore, we developed a novel combined high throughput screening method for high-lipid content mutants of C. protothecoides. Namely, we initially applied Nile red staining method for semi-quantification of lipid in the pre-screening process, and following with LF-NMR method for accurate lipid determination in re-screening process. Finally, we adopted this novel screening method in the breeding process of high-lipid content heterotrophic cells of C. protothecoides. From 3 098 mutated strains 108 high-lipid content strains were selected through pre-screening process, and then 9 mutants with high-lipid production were obtained in the re-screening process. In a consequence, with heterotrophical cultivation of 168 h, the lipid concentration could reach 5 g/L, and the highest lipid content exceeded 20% (W/W), which was almost two-fold to that of the wild strain. All these results demonstrated that the novel breeding process was reliable and feasible for improving the screening efficiency.
Chlorophyta ; chemistry ; Heterotrophic Processes ; High-Throughput Screening Assays ; Lipids ; analysis ; Magnetic Resonance Spectroscopy ; Microalgae ; chemistry ; Staining and Labeling

Clinicians,as the finders of clinical problems,the refiners of scientific questions and the cooperators of basic and clinic research,play key roles in translational medicine.Clinicians' playing an important part in the process will give the promotion of both the development of translational medicine and improvement of the health condition of the people.

Objective To study the diagnostic value of CT combined CA125 and HE4 in differentiating the ovarian cancer from the benign.Methods A case-control study included 52 ovarian cancer patients,47 patients with benign ovarian tumors,and 40 healthy control subjects.Preoperative serum levels of HE4 and CA125 were measured and CT was performed.Results The serum levels of CA125 and HE4 in the ovarian cancer groups [(264.37 ± 138.46) KU/L,(280.38 ± 135.14)pmol/L] were significantly high-er than that in the benign ovarian neoplasm group [(52.51 ±5.29) KU/L,(40.52 ± 10.34) pmol/L] and healthy control group [(10.69 ±6.15)KU/L,(37.24 ±9.84) pmol/L] (P ＜0.01).The serum levels of CA125 showed statistically significant difference between the benign ovarian neoplasm groups and healthy control groups (P ＜ 0.05).The serum levels of HE4 did not show statistically significant difference between the benign ovarian neoplasm groups and healthy control groups (P ＞ 0.05).The diagnostic sensitivity (65.4％,80.8％,75.0％),specificity (74.5％,85.1％,76.6％),and accuracy (69.7％,82.8％,75.8％) of each CA125,HE4,CT method for ovarian cancer did not show statistically significant difference (P ＞0.05).The diagnostic sensitivity (92.3％),specificity (93.6％) and accuracy (94.8％) of combination of CA125 and HE4 and CT were significantly higher and showed statistically significant difference compared with one method (x2 =7.461 18.711,P ＜ 0.01),but no significant difference compared with any two methods (P ＞ 0.05).Conclusions The serum levels of HE4 and CA125 in the ovarian cancer group were significantly higher,and CT in combination with those two serum indices improved the diagnostic sensitivity,specificity,and accuracy of ovarian cancer.

OBJECTIVE: To analyze the clinical pathologic characteristics of cervical intraepithelial neoplasia grade III (CINIII ) and to explore optimal surgery for CINIII patients. METHODS: The clinical pathologic characteristics, surgical treatments, prognosis and history of 383 CINIII patients, who hospitalized from August 2005 to December 2010, were reviewed and analyzed. Among the patients, 213 (55.6%) received cold-knife conization surgery and 170 (44.4%) received ordinary electric knife conization surgery. RESULTS: There was no significant statistic difference between cold-knife conization group and ordinary electric-knife conization group on the level of clearance of the pathologic tissues and the cervical cone diameter and cone high. Intraoperative blood loss was (13.1±5.2) mL and (25.5±17.2) mL. Bleeding of electric knife conization group, compared with that of the cold knife conization group, decreased by nearly 50%. The difference between the 2 groups was significant (P<0.01). Pathological examination after conization operation indicated that 350 out of the 383 patients didn't show pathological upgrade while 33 patients showed pathological development, among which 21 were diagnosed with invasive cervical cancer at Ia1 clincal stage, 7 atIa2 clincal stage and 5 atIb1 clincal stage. In 3 cases (14.3%) Ia1 cervical cancer patients, fertility requirements and negative margins with cervical conization were closely followed up, and one patient (4.8%) with positive margin and fertility requirements had re-conecut. The remaining 17 (80.9%) had resected the uterus outside the fascia (or plus attachments) . All the 12 patients with invasive cervical cancer at Ia2 orIb1 clinical stage received radical hysterectomy. No tumor recurrence was observed in the 383 patients. CONCLUSION Treatment optimazation of CINIII patients should be based on clinical pathological diagnosis and individual requirements. Both cervical conization surgery and total hysterectomy have been proved safe and practical for CINIII patients.
Adult ; Aged ; Cervical Intraepithelial Neoplasia ; pathology ; surgery ; Conization ; methods ; Female ; Humans ; Hysterectomy ; Middle Aged ; Neoplasm Grading ; Uterine Cervical Neoplasms ; pathology ; surgery

ObjectiveTostudythemolecularmechanismoflanthanumonblocking lipopolysaccharide(LPS)-mediated activation of nuclear factor-kappaB (NF-κB)signaling in macrophages.MethodsThe RAW264.7 macrophages were cultured routinely and divided into 4 groups randomly:LaCl3 +LPS group,LPS group,LaCl3 group and control group.The nuclear translocation of p65 protein was detected by immunocytochemistry.Total,cytoplasmic and nuclear proteins were extracted respectively,and then the binding activity of p65 with the target gene was measured by ELISA.Western blot assays were also performed to detect the expression levels of the proteins,including nuclear p65,IκBα and IKK kinase,the phosphorylation status of IκBα and IKK kinase.ResultsLanthanum can block LPS-induced activation of p65 protein through various ways,such as inhibiting its nuclear translocation,reducing its expression in the nuclei and decreasing its binding activity with the target genes.Lanthanum inhibited the degradation of LPS-induced IκBα,but the phosphorylation of LPS-induced IKKβ can not be blocked by lanthanum,nor did the phosphorylation ability of p-IKKβ on IκBα.Conclusion Lanthanum inhibited the degradation of IκBα,nuclei translocation of p65 protein and its binding activity with the target genes,thereby inhibited LPS-induced NFκB activation,which might be one of the inhibition mechanisms of lanthanum on nuclear activation.