Реферат
Objective To compare the pathological status of gastric mucosa and the expression of HH-PTCH-SMO-GLI(Hedgehog signaling pathway)and NOX/NF-κB/STAT1 signaling pathways in Hp and non-HP infected CAG patients,and to explore the biological mechanism of Hp promoting the"inflammatory cancer transformation"of CAG.Methods 43 patients with CAG who met the criteria were enrolled and divided into CAG with Hp infection group(Hp+ CAG group,n=21)and CAG without Hp infection group(HP-CAG group,n=22).The histological changes of gastric mucosa were observed by hematoxylin-eosin(HE)staining.Western blot was used to detect the relative expression levels of NOX1,NOX2,NOX4,STAT1,P65 and P-P65 in gastric mucosa.Real-time fluorescence quantitative PCR(RT-qPCR)was used to detect Gli1 mRNA,Gli2 mRNA,Gli3 mRNA,Shh mRNA,Smo mRNA,Ptch mRNA,NOX1 mRNA,NOX2 mRNA,NOX4 mRNA and NF-κB mRNA in gastric mucosa The mRNA level.Results HE staining results of gastric tissues in the two groups:In the Hp+CAG group,gastric epithelial cells were partially necrotic and shed,the surface was not smooth,the number of glands was reduced and disordered,intestinal metaplasia was observed,and diffuse lymphocyte and neutrophil infiltration were observed in the lamina proper.The degree of lymphocyte and neutrophil infiltration in HP-CAG group was lighter than that in Hp+CAG group.RT-qPCR results:Compared with HP-CAG group,the levels of Gli1 mRNA,Shh mRNA,Smo mRNA and Ptch mRNA in gastric mucosa of Hp+CAG group were significantly decreased(P<0.01).The levels of Gli2 mRNA,Gli3 mRNA,NOX1 mRNA,NOX2 mRNA,NOX4 mRNA and NF-κB mRNA were significantly increased(P<0.01).Western blot detection results:Compared with hP-CAG group,the relative expression levels of NOX1/GAPDH,NOX2/GAPDH,NOX4/GAPDH and P-P65/GAPDH in gastric mucosa of Hp+CAG group were significantly increased(P<0.01),and the STAT1 level was significantly decreased(P<0.01).There was no significant difference in the relative expression of P65/GAPDH between the two groups(P>0.05).Conclusion Hp infection may cause long-term inflammation of gastric mucosa,promote atrophy and intestinal metaplasia,and increase the risk of cancer by inhibiting hH-PTC-SMO-GLi signaling pathway and abnormal activation of NOX/NF-κB/STAT1 signaling pathway.
Реферат
Objective:To investigate the correlation between liver stiffness and histopathological changes in a rat model of acute hepatitis using virtual touch tissue imaging quantification (VTIQ) technology.Methods:A total of 100 SPF-grade SD rats were randomly divided into 3 groups: control ( n=30), low-dose ( n=35), and high-dose ( n=35) groups. Acute hepatitis models were induced in the low-dose and high-dose groups using 400 mg/kg and 600 mg/kg of Thioacetamide (TAA), respectively. Liver stiffness parameters of the right median lobe and right lobe were measured using VTIQ technology, Mean-H and Mean-L represent the liver lobes with higher and lower liver stiffness measurments, respectively, while Mean represent the average of the measurements from both liver lobes. Comparative analyses of liver stiffness parameters were performed across three groups and between the two lobes of the liver. The correlations between the Mean values of liver stiffness and semi-quantitative histopathological data were investigated. Ten rats were randomly selected from each of the 3 groups to test the repeatability of VTIQ values before and after euthanasia with intraperitoneal anesthesia. Subsequently, 10 rats after euthanasia from each 3 group were randomly chosen to assess the repeatability of VTIQ measurements for inter-observer and intra-observer variabilities. Results:VTIQ results showed statistically significant differences in Mean, Mean-H, and Mean-L among the 3 groups (all P<0.01). The high-dose group had higher measurements compared to the low-dose and control groups, with significant intergroup differences (all P<0.01). Significant differences in Mean-H and Mean-L were observed between the two liver lobes in both low and high-dose groups (all P<0.01). The Mean value showed significant positive correlations with semi-quantitative histopathological data of hepatocellular edema, periportal inflammatory cell infiltration, macrophage proliferation, and bile duct proliferation ( r=0.391, 0.648, 0.577, 0.542; all P<0.01). Multivariate linear regression analysis indicated that hepatocellular edema, eosinophilic change, and bile duct proliferation significantly and positively predicted the Mean value (β=-0.278, -0.196, -0.333; all P<0.05). There were no significant differences of VTIQ measurements befor and after euthanasia (all P>0.05), with repeatability coefficients of 0.166, 0.182, 0.185 for Mean, Mean-H, and Mean-L, respectively. Post-euthanasia, inter- and intra-observer VTIQ differences remained non-significant (all P>0.05), with Mean, Mean-H, Mean-L coefficients of 0.114, 0.194, 0.165 and 0.206, 0.322, 0.268, respectively. Conclusions:VTIQ technology demonstrates potential clinical value in assessing a rat model of acute hepatitis, offering a new perspective for non-invasive evaluation of acute hepatitis. However, its clinical application requires further validation.
Реферат
The incidence of augmented renal clearance (ARC) in intensive care patients (ICU) is exceptionally high, and these patients are often co-morbid with infection. The occurrence of ARC will significantly increase the clearance rate of antibiotics, making it difficult for conventional doses to reach effective therapeutic concentrations and affect the patient's anti-infective treatment effect and prognosis. It can be seen that it is crucial to formulate a reasonable dosing regimen for ICU patients with ARC. Regrettably, few reports in China about the adjustment strategy of antibiotic dosing regimens for ARC patients. Therefore, this article reviews the domestic and foreign literature for reference to provide evidence for medical personnel to adjust the dose of antibacterial drugs for such patients.
Реферат
Objective:To identify the morphological features and clinical significance of intra-vascular thrombus in carotid stenosis using optical coherence tomography (OCT).Methods:Twelve patients with carotid artery thrombosis detected by OCT assessment in Jinling Hospital between January 2017 and January 2020 were included. Serial area measurements within the athero-thrombotic target lesion were performed to evaluate the OCT-thrombus score, length, area and volume. The clinical data and plaque morphological features were also assessed.Results:Among the 12 patients demonstrating thrombus on OCT, eight patients presented with white thrombus, two patients presented with red thrombus, and another two patients displayed both white thrombus and red thrombus. OCT-thrombus scores were 1-32. The OCT-thrombus score was correlated to the OCT-thrombus volume ( ρ=0.739, P=0.006) and the thrombus length ( ρ=0.932, P<0.001). All lesions were presented with fibrous cap disruption, and 10 lesions were presented with thin-cap fibroatheroma. In view of the OCT findings, all patients received carotid balloon angioplasty and stent implantation. During an average follow-up of 14.2 months, none of the 12 patients had fatal stroke or recurrent ischemic stroke. Conclusions:OCT can be used to assess intra-carotid thrombus and its more detailed morphological characteristics, offering more possibilities in quantitative analysis of thrombus burden.
Реферат
OBJECTIVE@#To investigate the role of NDUFA13 inactivation in the pathogenesis of spontaneous hepatitis in mice and explore the possible mechanisms.@*METHODS@#Hepatocyte-specific NDUFA13 knockout (NDUFA13@*RESULTS@#Liver-specific NDUFA13 heterozygous knockout mice were successfully constructed as verified by PCR results. HE staining revealed severe liver damage in both 4- week-old and 2-year-old NDUFA13@*CONCLUSIONS@#Hepatocytes-specific NDUFA13 ablation can trigger spontaneous hepatitis in mice possibly mediated by the activation of ROS/NF-κB/NLRP3 signaling.
Тема - темы
Animals , Mice , Hepatitis , Inflammasomes , NF-kappa B/metabolism , NLR Family, Pyrin Domain-Containing 3 Protein/genetics , Signal TransductionРеферат
Objective:To investigate the relationship between serum microRNA-1 (miR-1) and microRNA-155 (miR-155) expression and disease severity and prognosis of acute cerebral infarction (ACI) in patients.Methods:A total of 173 patients with ACI who received treatment in Taizhou Municipal Hospital between April 2018 and August 2019 were included in this study. These patients were divided into mild ( n = 78), moderate ( n = 54) and severe ( n = 41) groups according to the National Institutes of Health Stroke Scale (NIHSS) score. A total of 180 patients who concurrently received physical examination were included in the control group. Serum miR-1 and miR-155 expression was determined in all participants using quantitative reverse transcription-polymerase chain reaction. The included patients were divided into poor prognosis and good prognosis groups according to modified Rankin scale score within 90 days after treatment. The efficacy of serum miR-1 and miR-155 expression in the prediction of ACI prognosis and the risk factors for poor prognosis of ACI were evaluated. Results:The history of hypertension, systolic blood pressure, diastolic blood pressure, total cholesterol, low density lipoprotein cholesterol, serum miR-1 and miR-155 expression in the study group were 56.65% (98/173), (134.02 ± 27.35) mmHg, (88.45 ± 9.52) mmHg, (3.78 ± 0.82) mmol/L, (2.08 ± 0.73) mmol/L, (2.07 ± 0.37) and (1.56 ± 0.32), respectively, which were significantly higher than those in the control group [39.44% (71/180), (119.37 ± 22.14) mmHg, (81.46 ± 14.13) mmHg, (3.59 ± 0.68) mmol/L, (1.74 ± 0.69) mmol/L, (1.01 ± 0.22), (1.02 ± 0.24)], high density lipoprotein cholesterol in the study group was significantly lower than that in the control group [(1.24 ± 0.22) mmol/L vs. (1.31 ± 0.26) mmol/L, χ2 = 10.462, t = 5.542, 5.429, 2.373, 4.498, 32.865, 17.982 and 2.725, all P < 0.05]. Serum miR-1 and miR-155 expression in patients with ACI gradually increased with the increase of disease severity ( t = 10.212, 13.050, 3.092, 7.027, 3.983 and 4.099, all P < 0.05). The proportion of patients having a history of hypertension in the poor prognosis group was significantly higher than that in the good prognosis group [64.47% (49/76) vs. 42.27% (41/97), χ2 = 8.419, P < 0.05]. Systolic blood pressure, diastolic blood pressure, NIHSS score, serum miR-1 and miR-155 expression in the poor prognosis group were (136.51 ± 12.56) mmHg, (89.53 ± 6.65) mmHg, (7.26 ± 0.58) points, (1.32 ± 0.15), (1.21 ± 0.12), respectively, which were significantly higher than those in the good prognosis group [42.27% (41/97), (132.19 ± 9.32) mmHg, (86.34 ± 5.62) mmHg, (6.44 ± 0.62) points, (1.01 ± 0.07) (0.99 ± 0.05), t = 2.597, 3.418, 8.880, 10.695 and 4.633, all P < 0.05]. The receiver operating characteristic curve (ROC curve) analysis results showed the area under the curve of serum miR-1 and miR-155 expression alone in predicting ACI prognosis was 0.814 (95% CI: 0.745-0.884) and 0.839 (95% CI: 0.780-0.897), respectively. The area under the curve of miR-1 and miR-155 expression in combination in predicting ACI prognosis was 0.944 (95% CI: 0.912-0.976). Logistic regression analysis results showed that increases in admission NIHSS score, miR-1 and miR-155 expression were the risk factors for poor prognosis of ACI ( P < 0.05). Conclusion:miR-1 and miR-155 expression levels are related to the severity of ACI and therefore may be the predictors of poor prognosis of ACI.
Реферат
We aimed to explore what kind of endocrine treatments are optimal for hormone receptorpositive and human epidermal growth factor receptor 2-negative locally advanced or metastatic breast cancer in some specific clinical situations. We searched randomized controlled trials in Embase, Medline, the Cochrane library, and PubMed from inception to April 1, 2020 and performed a network meta-analysis based on a Bayesian fixed-effects model. Progression-free survival (PFS) with hazard ratios and corresponding 95% confidence interval was defined as the primary endpoint, while overall survival (OS), objective response rate (ORR), clinical benefit rate and serious adverse events were used as secondary endpoints. A total of 35 studies involving 12,285 patients and 24 treatment options were included. In general, most co-treatment options prolonged PFS compared to single-agent therapy, of which aromatase inhibitor (AI) plus everolimus and fulvestrant plus palbociclib were probably the most effective agents, and the latter had the best safety record. However, despite the superior efficacy of fulvestrant plus capecitabine for PFS and OS, palpable toxic effects have been demonstrated for this treatment, so its application must be scrupulously considered. The results of subgroup analysis indicated that fulvestrant combined with palbociclib improved prognosis for phosphatidylinositol 3-kinase (PI3K)-mutated patients, PI3K-unmutated patients, patients with endocrine therapy resistance, and visceral metastatic patients, while no obvious improvement was detected in OS. Moreover, the efficacy of fulvestrant plus cyclin-dependent kinase 4/6 (CDK4/6) inhibitors was slightly better than that of AI plus CDK4/6 inhibitors, while AI plus everolimus was more efficacious than fulvestrant combined with everolimus in terms of PFS, OS, and ORR. In conclusion, our results provide moderate evidence that fulvestrant plus palbociclib and AI plus everolimus were the most effective treatments, while the efficacy and safety of fulvestrant plus palbociclib was obviously superior in some specific clinical situations.
Реферат
We aimed to explore what kind of endocrine treatments are optimal for hormone receptorpositive and human epidermal growth factor receptor 2-negative locally advanced or metastatic breast cancer in some specific clinical situations. We searched randomized controlled trials in Embase, Medline, the Cochrane library, and PubMed from inception to April 1, 2020 and performed a network meta-analysis based on a Bayesian fixed-effects model. Progression-free survival (PFS) with hazard ratios and corresponding 95% confidence interval was defined as the primary endpoint, while overall survival (OS), objective response rate (ORR), clinical benefit rate and serious adverse events were used as secondary endpoints. A total of 35 studies involving 12,285 patients and 24 treatment options were included. In general, most co-treatment options prolonged PFS compared to single-agent therapy, of which aromatase inhibitor (AI) plus everolimus and fulvestrant plus palbociclib were probably the most effective agents, and the latter had the best safety record. However, despite the superior efficacy of fulvestrant plus capecitabine for PFS and OS, palpable toxic effects have been demonstrated for this treatment, so its application must be scrupulously considered. The results of subgroup analysis indicated that fulvestrant combined with palbociclib improved prognosis for phosphatidylinositol 3-kinase (PI3K)-mutated patients, PI3K-unmutated patients, patients with endocrine therapy resistance, and visceral metastatic patients, while no obvious improvement was detected in OS. Moreover, the efficacy of fulvestrant plus cyclin-dependent kinase 4/6 (CDK4/6) inhibitors was slightly better than that of AI plus CDK4/6 inhibitors, while AI plus everolimus was more efficacious than fulvestrant combined with everolimus in terms of PFS, OS, and ORR. In conclusion, our results provide moderate evidence that fulvestrant plus palbociclib and AI plus everolimus were the most effective treatments, while the efficacy and safety of fulvestrant plus palbociclib was obviously superior in some specific clinical situations.
Реферат
Objective:To explore the value of intravascular optical coherence tomography (OCT) in evaluating carotid atherosclerotic stenosis, and compare the morphological characteristics of symptomatic and asymptomatic carotid atherosclerotic plaques.Methods:Patients diagnosed as carotid atherosclerotic stenosis and performed OCT in the Department of Neurology, Jinling Hospital, Medical School of Nanjing University from January 2017 to November 2019 were enrolled retrospectively. Digital subtraction angiography (DSA) and OCT were used to determine the degree of stenosis of the diseased vessels, and the plaque characteristics observed by OCT were recorded. Symptomatic carotid atherosclerotic stenosis is defined as a history of transient ischemic attack, amaurosis fugax, or stroke related to the blood supply area of the diseased vessel within 6 months before the carotid artery examination. The baseline clinical and imaging data of the symptomatic group and the asymptomatic group were compared. Multivariate logistic regression analysis was used to determine the independent risk factors for symptomatic carotid atherosclerotic stenosis. Results:A total of 56 patients were enrolled. DSA and OCT had good consistency in carotid artery diameter measurement ( r=0.93, P<0.001). When the OCT technique was used to evaluate the plaque properties, the consistency of inter-observer ( κ=0.96, P<0.001) and intra-observer ( κ=0.96, P<0.001) was higher. The proportions of patients with type Ⅵ plaque (66.7% vs. 34.5%; P=0.016) and macrophage infiltration (51.9% vs. 24.1%; P=0.032) in the symptomatic group were significantly higher than those in the asymptomatic group, while the proportion of patients with fibrotic plaque was significantly lower than that in the asymptomatic group (40.7% vs. 69.0%; P=0.034). Multivariate logistic regression analysis suggested that type Ⅵ plaques (odds ratio 13.798, 95% confidence interval 1.38-137.675; P=0.025) and macrophage infiltration (odds ratio 5.856, 95% confidence interval 1.405-24.406; P=0.015) were the independent risk factors for symptomatic carotid atherosclerotic stenosis. Conclusions:OCT can be used to evaluate the degree of vascular stenosis and plaque characteristics in patients with carotid atherosclerotic stenosis. The detection rate of complex plaques in patients with symptomatic carotid atherosclerotic stenosis is significantly higher. Type Ⅵ plaque and macrophage infiltration are the independent risk factors for symptomatic carotid atherosclerotic stenosis.
Реферат
Objective To explore the characteristics of thrombelastogaphy( TEG)in term neonates,and to evaluate their correlation with traditional coagulation tests. Methods A total of 52 term neonates were enrolled as neo-natal group and 34 adults undergoing elective surgery as adult control group in Jiangmen Central Hospital from January to December 2017. TEG,plasma coagulation test and platelet counts(PLT)were performed and the corresponding ana-lysis was conducted. Results TEG parameters in term neonates:response time(R)(4. 18 ± 1. 08)min,clot kinetics (K)(1. 21 ± 0. 45)min,α angle( Angle)(73. 08 ± 5. 74)°,maximum amplitude( MA)(65. 68 ± 7. 13)mm. Com-pared with adult control group,neonatal group exhibited shorter R and K(t=3. 764,P<0. 001;t=4. 888,P<0. 001), higher Angle,MA(t=5. 539,P<0. 001;t=2. 873,P=0. 001). In traditional coagulation,compared with adult control group,neonatal group showed longer prothrombin time( PT),activated partial thromboplastin time( APTT),thrombin time(TT)(t=5. 449,P<0. 001;t=13. 134,P<0. 001;t=3. 575,P=0. 001),lower fibrinogen( Fib)(t=4. 164, P<0. 001),and higher PLT(t=4. 230,P<0. 001). In addition,K was negatively correlated with Fib(r= -0. 374, P=0. 004),while Angle and MA were positively correlated with Fib(r=0. 354,P=0. 007;r=0. 630,P<0. 001);K was negatively correlated with PLT(r= -0. 430,P=0. 001),but Angle and MA were positively correlated with PLT (r=0. 427,P=0. 001;r=0. 586,P<0. 001);K was positively correlated with APTT(r=0. 285,P=0. 035),and MA was negatively correlated with APTT(r= -0. 324,P=0. 017). There was no significant correlation between R and tra-ditional coagulation test. K,MA and Angle were not significantly correlated with PT(all P >0. 05),and Angle and APTT were not significantly correlated(all P>0. 05). Conclusions The reference interval of TEG in term neonates is different from adults. And the parameters of TEG in term neonates are partly related to the traditional coagulation tests.
Реферат
Objective To analyze the reasons for the retraction of journal papers after publishing,take preventive measures,provide countermeasures for establishing research integrity.Methods Search the PubMed Database (https://www.ncbi.nlm.nih.gov/pubmed/) with search type "Retracted Publication" [Publication Type] OR "Retraction of Publication" [Publication Type],from 2016/01/01 to 2017/06/01,to acquire the retracted publications,and to summarize the reasons for retraction.Results Initially extracted 1 098 results,and ultimately 895 papers were included in the analysis.The reasons for retraction were divided into two categories:unintentional errors and academic misconduct.The main reasons of academic misconduct were fabrication and falsification,accounted for 30.17％,followed by plagiarism,accounted for 20.22％.Conclusions Main reason for the retraction of journal papers was academic misconduct.We can establish scientific integrity through the following ways,such as strengthening the research ethics education and enhancing the awareness of research integrity;improving the scientific evaluation system and creating free atmosphere of scientific research;establishing long-term system of management,supervision and punishment of scientific research;taking rigorous review of manuscripts by editor.
Реферат
Objective@#To explore the characteristics of thrombelastogaphy (TEG) in term neonates, and to evaluate their correlation with traditional coagulation tests.@*Methods@#A total of 52 term neonates were enrolled as neonatal group and 34 adults undergoing elective surgery as adult control group in Jiangmen Central Hospital from January to December 2017.TEG, plasma coagulation test and platelet counts (PLT) were performed and the corresponding ana-lysis was conducted.@*Results@#TEG parameters in term neonates: response time(R)(4.18±1.08)min, clot kinetics(K)(1.21±0.45) min, α angle (Angle)(73.08±5.74)°, maximum amplitude(MA)(65.68±7.13)mm.Compared with adult control group, neonatal group exhibited shorter R and K(t=3.764, P<0.001; t=4.888, P<0.001), higher Angle, MA(t=5.539, P<0.001; t=2.873, P=0.001). In traditional coagulation, compared with adult control group, neonatal group showed longer prothrombin time(PT), activated partial thromboplastin time(APTT), thrombin time(TT) (t=5.449, P<0.001; t=13.134, P<0.001; t=3.575, P=0.001), lower fibrinogen(Fib) (t=4.164, P<0.001), and higher PLT (t=4.230, P<0.001). In addition, K was negatively correlated with Fib(r=-0.374, P=0.004), while Angle and MA were positively correlated with Fib(r=0.354, P=0.007; r=0.630, P<0.001); K was negatively correlated with PLT(r=-0.430, P=0.001), but Angle and MA were positively correlated with PLT (r=0.427, P=0.001; r=0.586, P<0.001); K was positively correlated with APTT(r=0.285, P=0.035), and MA was negatively correlated with APTT(r=-0.324, P=0.017). There was no significant correlation between R and traditional coagulation test.K, MA and Angle were not significantly correlated with PT (all P>0.05), and Angle and APTT were not significantly correlated (all P>0.05).@*Conclusions@#The reference interval of TEG in term neonates is different from adults.And the parameters of TEG in term neonates are partly related to the traditional coagulation tests.
Реферат
Objective@#To analyze the disease burden of pancreatic cancer in China in 1990 and 2017.@*Methods@#Province-specific data in China from the Global Burden of Disease Study (GBD) 2017 were used to describe the change of death status, disease burden of pancreatic cancer in Chinese population by specific province and age groups, including incidence, mortality, disability-adjusted life years (DALY), years of life lost (YLL) due to premature mortality and years lived with disability (YLD) in 1990 and 2017. Meanwhile the incidence, mortality, DALY rate, YLL rate, YLD rate were standardized by the GBD global standard population in 2017.@*Results@#In 2017, the new cases of pancreatic cancer, incidence and age-standardized incidence accounted for 83.6 thousand, 5.92/100 000 and 4.37/100 000 in China, with an increase of 230.94%, 180.45% and 49.88% compared with 1990, respectively. The total number of deaths, mortality and age-standardized mortality appeared as 85.1 thousand, 6.02/100 000, 4.48/100 000, with an increase of 236.08%, 184.80% and 47.51% respectively. The incidence and mortality of pancreatic cancer increased with age and accelerated from the age of 55 to 59 both in 1990 and 2017. The highest incidence and mortality showed in 85-89 years old in 2017 and in 90-94 years old in 1990. The standardized DALY rate of pancreatic cancer increased from 71.00/100 000 in 1990 to 94.32/100 000 in 2017, increased by 32.84%. The standardized YLL rate increased from 70.39/100 000 to 93.42/100 000, increased by 32.72%. The standardized YLD rate increased from 0.62/100 000 to 0.90/100 000, increased by 45.80%. In terms of age distribution, DALY rate, YLL rate and YLD rate of pancreatic cancer basically showed an increasing trend with age in 1990 and 2017. In 2017, Jiangsu (7.61/100 000), Shanghai (7.52/100 000) and Liaoning (6.84/100 000) ranked the top three provinces in terms of standardized mortality. Compared with 1990, Henan (104.28%), Sichuan (94.02%) and Hebei (90.39%) saw the fastest increase in standardized mortality.@*Conclusions@#The incidence, mortality and disease burden of pancreatic cancer in China increased significantly from 1990 to 2017. Prevention and control measures should be strengthened to reduce the disease burden of pancreatic cancer.
Реферат
As an emerging intravascular imaging technology, intravascular optical coherence tomography (OCT) has been recognized for its clinical application value in the continuous exploration of the past decade. With its high resolution, OCT can clearly display the subtle morphological features of arterial stenosis lesions, help select treatment options, guide stent placement, and evaluate stent-vessel relationship and neo-intimal coverage after stent implantation for timely detecting early and late complications after stent placement. In recent years, a series of studies have also explored the value of OCT in the evaluation of cerebral angiography and intracranial and extracranial artery stent placement. We made a review of this topic.
Реферат
Objective Improve the ethical review models of multi-center clinical trial.Methods Analyze the ethical review models of multi-center clinical trial in China,and summarize advantages and disadvantages of the different methods.Then,clarify the development of ethical review methods of multi-center clinical trial in our hospital.Results Four methods were used to review the multi center clinical trial in China,including independent ethical review,central institutional ethical review,central review made by committee cooperation,collaborative review.Each method has its advantages and disadvantages.Collaborative review about multi-center clinical trial is adopted now in our hospital.Conclusions Using collaborative review model of multi-center clinical trial,the ethical review could achieve timely and uniformly.
Реферат
Objective To analyze the reasons for the withdrawal of the National Natural Science Foundation of China projects,adopt preventive measurements,to provide countermeasures for the project application and establish scientific integrity.Methods Search the official website of National Natural Science Foundation of China(http://www.nsfc.gov.cn/),and browse case processing decisions during the last five years,analyze the reasons for the withdrawal of projects and classify the scientific misconducts.Results We got 83 publicly accessible cases which involved 93 persons.There were 52 projects whose fund granting has been annulled,and 50 projects at the stage of application have been revoked due to scientific misconduct.The projects were withdrawn mainly due to the fraud peer review,accounting for 46.2％,the project applications were revoked mainly due to copying applications,accounting for 54.0％.Conclusions The countermeasures to prevent the scientific misconducts in the application process including:increase scientific research integrity propaganda;improve the construction of laws and regulations;improve the detection rate of scientific misconduct;give full play to the supervisory role of supporting institutions;increase the intensity of punishment;improve the selection and supervision system of experts;establish a credit management system during the whole process.
Реферат
Aim To investigate the effect of the extract of Averrhoacarambola L.root (EACR)on renal func-tion in diabetic mice and its anti-oxidative action. Methods Diabetic mice were established by tail vein injection with 120 mg·kg-1 streptozotocin (STZ)and were divided into 5 groups:model control group,val-sartan control group,and low-,middle-,high-dose of EACR groups (300,600,1 200 mg·kg-1 ).And 10 normal mice consisted of normal control group.The fasting blood glucose (FBG)of mice was detected be-fore and after administration of drugs.After last admin-istration,the blood and urine samples were collected for creatinine (Cr),urea nitrogen (BUN),urine and 24 h urinary protein determination.The activities of superoxide dismutase (SOD ),glutathione peroxidase (GSH-Px)and malonaldehyde (MDA)content were determined using kits.HE staining was conducted to observe the pathological changes of kidney tissues. ELISA method was utilized to detect the contents of catalase (CAT)and reactive oxygen species (ROS ). The expressions of Cyto-C,AIF and caspase-3 proteins in kidney tissues were analyzed by Western blot.Re-sults Compared with model group,the serum bio-chemical indexes and 24 h urinary protein of valsartan and moderate-,high-dose of EACR groups were de-creased with statistical significance (P<0.05 ).After the treatment, the MDA content was decreased by EACR treatment,and SOD,GSH-Px and CAT activities were enhanced.Meanwhile the expressions of ROS, Cyto-C,AIF and caspase-3 were down-regulated.The pathological changes of kidney tissues were ameliorated by EACR through HE results.Conclusions The ex-tract of Averrhoacarambola L.root can decrease the se-rum levels of Cr and BUN,reduce the MDA and ROS contents in kidney tissue and enhance the activities of SOD,GSH-Px and CAT,down-regulate the expres-sions of Cyto-C,AIF and caspase-3 proteins in kidney tissues,elevate the anti-oxidative effect of kidney. Therefore,the renal function of diabetic mice is melio-rated.
Реферат
Objective To cast light on the mechanisms governing anaplastic thyroid carcinoma (ATC) and to evaluate the minichromosomes maintain protein (MCM) 5 and MCM7 expression in human normal thyroid (NT),papillary thyroid carcinoma (PTC),and ATC samples,as well as in primary culture cells.Methods We tested the expression of MCM5,MCM7and PCNA in NT,PTC and ATC by immunohistochemistry.We used Western blot and Northern blot to test the expression of MCM5,and MCM7.ATC cells were transfected with MCM7 siRNA,and Western blot was used to examine the change of the expression of MCM7.Results In ATC samples,MCM5 had high expression in 65％ patients,and MCM7 had high expression in 73％ patients.The expression of MCM5 and MCM7 in NT and PTC samples were very low which can be ignored.In ATC cells,high MCM5 and MCM7 expression was paralleled by high levels of MCM2 and MCM6.Inhibition of MCM7 protein levels by small inhibitory duplex RNAs could reduce the rate of DNA synthesis in ATC cells.Conclusion MCM protein expression is upregulated in ATC and leads to excessive proliferation of ATC.
Реферат
Objective To investigate the efficacy of volume target pressure control(VTPC)and synchronized intermittent mandatory ventilation(SIMV)in treating severe neonatal respiratory distress syndrome(NRDS). Methods Fifty - six admitted cases with severe NRDS hospitalized in Jiangmen Central Hospital from October 2012 to March 2015 were randomly divided into 2 groups:28 cases in VTPC group were treated by VTPC and SIMV,and 28 cases in pressure control ventilation(PCV)group were treated by PCV and SIMV. There was no significant difference between 2 groups in terms of gender,gestational age,and birth weight(all P ﹥ 0. 05). Artery blood gas analysis was performed at 6 hours,12 hours,24 hours,and 48 hours respectively after ventilation. The following parameters were observed:the time of invasive mechanical ventilation,duration of oxygen therapy,mortality and the incidence rates of hypocapnia,pneumo-thorax,ventilator associated pneumonia( VAP),grade Ⅲ - Ⅳ periventricular intraventricular hemorrhage( PVH -IVH),periventricular leukomalacia(PVL)and bronchopulmonary dysplasia(BPD). Results No case in 2 groups withdrew from the test. There was no significant difference between 2 groups in terms of the first treatment time and total doses of poractant alfa injection(all P ﹥ 0. 05). The time of invasive mechanical ventilation in VTPC group[(71. 75 ± 9. 82)h]was shorter than that in PVC group[(97. 89 ± 16. 88)h](t = 7. 083,P = 0. 000). Hypocapnia incidence of four blood gas analysis in VTPC group[(19. 64 ± 14. 20)% ]was lower than that in PCV group[(47. 32 ± 18. 43)% ] (t = 6. 294,P = 0. 000). Incidence rates of VAP and PVL in VTPC group were lower than those in PCV group(χ2 =5. 197,P = 0. 023;χ2 = 4. 766,P = 0. 029). However,duration of oxygen therapy,mortality and the incidence rates of pneumothorax,Ⅲ - Ⅳ PVH - IVH and BPD were not significantly different between 2 groups( all P ﹥ 0. 05). Conclusion VTPC + SIMV has a better efficacy than PCV + SIMV in the treatment of NRDS.
Реферат
Objective To investigate the correlation between arachidonate 15-lipoxygenase (ALOX15)gene polymorphism and its genetic predisposition to coronary heart disease (CHD)in Han population of Shaanxi Province so as to provide the basis for early diagnosis and prophylaxis of CHD.Methods The single nucleotide polymorphisms (SNPs)of ALOX15’s rs916055,rs2619112,and rs2664593 were measured by using matrix-assisted laser desorption/ionization-time of flight (MALDI-TOF)method in 105 CHD patients (CHD group)and 75 non-CHD patients (control group)who were matched in age and sex.Results The frequencies of genotypes and alleles of SNPs rs916055A/G in CHD group were significantly different from those in control group (P=0.000 1,P=0.000 1).The frequencies of genotypes and alleles of SNP rs2619112A/G in CHD group did not significantly differ from those in control group (P=0.134 2,P=0.143 8).The frequencies of genotypes of SNP rs2664593C/G in CHD group significantly differed from those in control group (P=0.002 7),but the frequencies of alleles were not significantly different (P=0.537 1).Logistic regression analysis indicated that the A allele of SNP rs916055 was an independent risk factor for CHD.Conclusion SNP rs916055 may be related to CHD and its A allele may be the genetic susceptibility gene for CHD.