Interaction, Surface Activity, and Application of Mixed Systems of Alcohol Ether Sulfate Anionic Surfactants with Multiple Ethylene Oxide Groups and Gemini Quaternary Ammonium Surfactant.

The surface activities and application properties for the mixtures of cationic surfactants tetramethylene-1,4-bis[N,N-bis(hydroxypropyl)-hexa/decyloxypropylammonium] bromide (GC10-P) and tetramethylene-1,4-bis[N,N-bis(hydroxyethyl)-hexa/decyloxypropylammonium] bromide (GC10-E) and anionic surfactant isomeric sodium fatty alcohol ether sulfates (iso-AE9S) were investigated using both the tensiometry and the conductometry. The interaction parameters and thermodynamic micellization parameters of GC10-P/iso-AE9S and GC10-E/iso-AE9S mixtures were evaluated by Clint-Rubingh and Motomura theoretical models. When the mole fraction of α1 for GC10-P/iso-AE9S mixed system was 0.2, the critical micelle concentration (CMC) reached a minimum of 1.61 × 10-4 mol/L, and the minimum critical micelle concentration of the GC10-E/iso-AE9S mixed system is 2.67 × 10-5 mol/L at α1 = 0.6. The CMC value of the mixed system is 1-2 orders of magnitude lower than that of any single component. The results indicate that the synergistic effects of the investigated mixed systems (evaluated by ßm) are in order of GC10-P/iso-AE9S < GC10-E/iso-AE9S, with maximum ßm values of -17.98 and -9.78, respectively. The change in zeta potential indicates that the poly(ethylene oxide) chain has weakened the charge density of the hydrophilic headgroup of the anionic surfactant. The interfacial tension at the oil-water interface in the mixed system of anionic/cationic surfactants is lower than that of any single component, exhibiting a higher interfacial activity. The mixed system exhibits a decreased contact angle and superior wetting ability over any single component, and it also enhances foam performance, emulsification performance, and degreasing performance.

Analysis of factors influencing the frequency of health check-up and health check-up behavior in healthy population / 中华行为医学与脑科学杂志

Objective:To analyze the relevant factors affecting the frequency and behavior of health check-up among the population of medical examinees.Methods:From January to June 2022, 491 health examinees who had health check-ups at the Second Affiliated Hospital of Shandong First Medical University were included.Basic information of the check-up population and their needs for check-up services (form of check-up, content of check-up, cost of check-up, form of feedback on check-up results, and needs for check-up providers) were obtained based on a questionnaire survey.According to the frequency of previous medical check-up, the examinees were divided into never-check-up group (frequency of check-up was 0, n=45), the irregular check-up group (the interval between two physical examinations >1 year, n=49) and the regular check-up group (frequency of check-up=1 year, n=347). The frequency of previous medical check-up was used as the dependent variable, and the age, gender, education level, income, form of medical check-up and cost of medical check-up were used as independent variables to analyse the relevant factors affecting the frequency of their medical check-ups.The above count data were analyzed by one-way analysis using chi-square test, and the count data with statistically significant differences in one-way analysis were analyzed by binary logistic regression.The statistical software was SPSS 21.0. Results:The study included 491 medical examinees, of which 9.16%(45/491) were in the never-check-up group, 20.16%(99/491) in the irregular check-up group and 70.68%(347/491) in the regular check-up group. The impact of demography characteristics of physical examinees on the frequency of health check-up, and there were statistically significant differences in the frequency of health check-up in terms of gender, job, education, and income ( χ2=21.826, 157.113, 104.764, 45.486, all P<0.05). The understanding of health check-up and the attention paid to one's own health were influencing factors that affected the frequency of health check-up. There were statistically significant differences in the frequency of health check-up in necessity of health check-up, attention to one's own health, health check-up forms, health check-up institutions, health check-up price and health check-up contents ( χ2=9.277, 25.863188.239, 59.115, 39.250, 28.314, all P<0.05). Logistic regression analysis showed gender, job type, monthly income, necessity of health check-up, concerns for items of check-up, forms and institutions of check-up were influencing factor of health check-up frequency(all P<0.05). Conclusion:The health check-up behavior of the population and the frequency of regular medical check-ups are influenced by the factors such as gender, education, occupation, income, form of medical check-up, price of medical check-up, choice of medical check-up institution and the degree of concern for one’s own health. The popularisation of health check-ups for special groups such as men, low-income people, low literacy and insufficient awareness of the importance of one’s own health will help improve the overall health awareness of the population.

[Clinical Characteristics and Risk Factors of Nosocomial Infection in 472 Patients with Non-Hodgkin Lymphoma].

OBJECTIVE: To investigate the clinical characteristics and risk factors of nosocomial infection in patients with non-Hodgkin lymphoma (NHL), in order to guide better clinical prevention and treatment of nosocomial infection. METHODS: The incidence of nosocomial infection, infection site, characteristics of pathogenic bacteria, drug sensitivity test results and infection risk factors of 472 non-Hodgkin lymphoma patients admitted to the Second Affiliated Hospital of Fujian Medical University from January 2015 to September 2020 were retrospectively analyzed. RESULTS: Among the 472 patients, 97 (20.6%) had nosocomial infection, mainly in the lower respiratory tract (41.2%), followed by oral cavity, upper respiratory tract, urogenital tract, and blood. A total of 71 strains of pathogenic bacteria were isolated, including Gram-negative (G-) bacteria (52.1%), Gram-positive (G+) bacteria (28.2%), and fungi (19.7%). The detection rate of extended-spectrum ß-lactamase (ESBLs) in Klebsiella pneumoniae and Escherichia coli was 36.4% and 22.2%, respectively. The resistance rate of Pseudomonas aeruginosa to carbapenems (imipenem) in G- bacteria was 33.3%, while the sensitivity rate of other G- bacteria was 100%. Among the 7 strains of Staphylococcus aureus, 1 strain was found to be methicillin-resistant Staphylococcus aureus (MRSA), and the sensitivity of G+ bacteria to linezolid, tigecyclinetegacycline and vancomycin was 100%. Candida albicans was the main source of fungal infection. Univariate analysis showed that nosocomial infection was associated with hospital day, bone marrow involvement, clinical stage, chemotherapy, neutrophil count in peripheral blood, and lymphoma type. Multivariable Logistic regression model showed that hospital days ≤7 was the protective factor of nosocomial infection, while clinical stage (Ⅲ, Ⅳ period), tumor involving bone marrow, and peripheral blood neutrophil count <0.5×109/L were major risk factors. CONCLUSION: NHL patients show high nosocomial infection rate and lower respiratory tract infection is common. Hospital day, clinical stage, presence of bone marrow invasion, and neutrophil count in peripheral blood are independent risk factors.

Circular RNA NOX4 promotes the development of colorectal cancer via the microRNA­485­5p/CKS1B axis.

Colorectal cancer (CRC) is a common malignancy globally. The aim of the present study was to explore the role and the working mechanism of circular RNA NADPH oxidase 4 (circNOX4; circBase ID, hsa_circ_0023990) in CRC. Reverse transcription­quantitative (RT­q)PCR was used to examine the expression of circNOX4, NOX4 mRNA and microRNA (miR)­485­5p in CRC tissues and cell lines. 3­(4,5­Dimethylthiazol­2­yl)­2,5­diphenyltetrazolium bromide and Transwell assays were performed to analyze CRC cell viability and motility. The glycolytic ability of CRC cells was assessed by measuring glucose consumption, lactate production, extracellular acidification and O2 consumption rates using commercial kits. The starBase database was used to predict the targets of circNOX4 and miR­485­5p, and the interaction was confirmed by dual­luciferase reporter and RNA immunoprecipitation assays. A murine xenograft model was established to verify the role of circNOX4 in CRC in vivo. The results demonstrated that the expression of circNOX4 was upregulated in CRC tissues and cell lines compared with that in adjacent normal tissues and a normal colon epithelial cell line, respectively. The expression of circNOX4 was negatively associated with the prognosis of patients with CRC. CircNOX4 silencing suppressed the proliferation, migration, invasion and glycolysis of CRC cells. miR­485­5p was identified as a target of circNOX4. CircNOX4 promoted CRC progression by sponging miR­485­5p. miR­485­5p was demonstrated to bind to the 3' untranslated region (UTR) of CDC28 protein kinase regulatory subunit 1B (CKS1B). miR­485­5p overexpression­mediated malignant properties of CRC cells were partly reversed by the transfection with the CKS1B overexpression plasmid. CircNOX4 silencing restrained the CRC xenograft growth in vivo. Collectively, the results of the present study demonstrated that circNOX4 may serve an oncogenic role in CRC by promoting the proliferation, migration, invasion and glycolysis of CRC cells via the miR­485­5p/CKS1B axis.

Empyema caused by intrathoracic infection of pulmonary multilocular echinococcus: a case report and a review of literature / 中国综合临床

Objective:To investigate the diagnosis and treatment of empyema caused by intrathoracic infection of pulmonary multilocular Echinococcus.Methods:From August 2016 to September 2016, a case of empyema caused by pulmonary multilocular Echinococcus infection was analyzed retrospectively in the second Department of cardiothoracic surgery, the First Affiliated Hospital, School of Medicine, Shihezi University, and the relevant literature was consulted to analyze its clinical diagnosis and treatment characteristics (including epidemiological characteristics, clinical manifestations, imaging manifestations), and to explore the specific operation mode and prognosis of surgical treatment The diagnosis and treatment of empyema caused by pulmonary multilocular Echinococcus infection were discussed..Results:Due to the lack of characteristic clinical manifestations and imaging examination results, the case was not clearly diagnosed at the early stage of treatment (only initially diagnosed as empyema). After multiple consultations, it was finally decided to perform thoracoscopic empyema removal.At last, it was confirmed that the infection of pulmonary multilocular hydatid caused empyema during the operation.After the diagnosis, it was treated by thoracoscopic intrathecal resection of pulmonary hydatid + empyema clearance.After the operation, it was treated with paixilin tazobactam.Finally, the patient was discharged smoothly.Conclusion:Empyema caused by pulmonary multilocular echinococcosis is very rare.Medical workers, especially those in non echinococcosis endemic areas, should pay more attention to it.Only by improving the awareness of such rare cases can we make a clear diagnosis in the early stage and then take effective treatment.The combination of surgical operation treatment and anti infective drugs treatment can effectively cure empyema caused by pulmonary multilocular Echinococcus infection.

Safety and effectiveness of combination application of thrombus aspiration and intracoronary injection of tirofiban / 重庆医学

Objective To investigate the interventional therapy effect of combination application of thrombus aspiration and intracoronary injection of tirofiban for treating heavy thrombosis burden of infarction related vessel in the patients with acute anterior myocardial infarction.Methods The patients with acute anterior myocardial infarction undergone direct primary percutaneous coronary intervention in the hospital were retrospectively analyzed.The group A received simple thrombus aspiration during transcutaneous PCI and the group B received the combination treatment of thrombus aspiration and intracoronary injection of tirofiban in direct PCI.Results The patients with myocardial perfusion grade less than 3 during thrombolysis during myocardial infarction(TIMI) in the group B were significantly less than those in the group A(P＜0.05).The cardiac magnetic resonance imaging(MRI) results indicated that the area of myocardial infarction in the group B was smaller than that in the group A(P＜0.05).The color echocardiography results showed that the left ventricular diastolic volume(LVDV) and left ventricular ejection fraction(LVEF) in the group B were significantly better than those in the group A(P＜0.05).Conclnsion The combination application of thrombus aspiration and intracoronary injection of tirofiban is safe and effective in direct PCI.

Investigation and Analysis of Medication Compliance of Patients with Nonvalvular Atrial Fibrillation to Warfarin and Its Influential Factors / 中国药房

OBJECTIVE:To improve medication compliance of patients with nonvalvular atrial fibrillation (NVAF) to warfarin and its influential factors,and to provide reference for guaranteeing the safety and effectiveness of therapy.METHODS:A questionnaire survey was conducted among NVAF patients receiving warfarin anticoagulation in our hospital,MMAS-8 and WRKS were adopted to evaluate medication compliance of patients to warfarin and the understanding of patients to the knowledge of anticoagulation treatment.Related influential factors for medication compliance of patients to warfarin were investigated by x2 test,t test and Logistic multiple regression analysis.RESULTS:Totally 129 questionnaires were sent out,and 112 were effectively received with effective recovery of 86.82％.The mean score of MMAS was (6.54 ± 1.61),and 42.86％ patients had good medication compliance.The mean score of WRKS was (7.95 ± 1.65);that of patients with good medication compliance was (9.31 ± 0.83),and that of patients with poor medication compliance was (6.92 ± 1.34).Single factor analysis showed that there was statistical significance in gender,age,occupation,educational level,the number of compliance,WRKS score between patients with good medication compliance and those with poor medication compliance (P＜0.05).Multivariate Logistic regression analysis showed that WRKS score,gender,educational level and the number of compliance were significantly correlated with medication compliance (P＜0.05).CONCLUSIONS:Poor medication compliance of NVAF patients to warfarin is related to multiple influential factors.The knowledge of warfarin anticoagulation is an important factor.

Preliminary application experience of GuidezillaTM guide extension catheter during complex coronary percutaneous coronary intervention procedure / 中国介入心脏病学杂志

Objective To evaluate the clinical safety and efficacy of GuidezillaTM guide extension catheter during complex coronary percutaneous coronary intervention(PCI). Methods A total of 13 patients were included in the studywho presented with complex coronary lesions during PCI. Stents or balloons could not be delivered to these complex lesions with conventional approach and GuidezillaTM guide extension catheters were used. Results Among these 13 patients,there were 7 CTO lesions,7 calcified lesions, 6 tortuous lesions,8 diffuse lesions,8 distal lesions and 8 lesions with pre-existing stents. PCI success rate was 100% .In one patient,GuidezillaTM guide extension catheter was obstructed which were relieved after stent implantation. There was no major adverse cardiac event(MACE) during follow-up.Conclusions The GuidezillaTM guide extension catheter was safe and effective for PCI of complex coronary artery lesions.

Investigation and Analysis of Medication Compliance of Patients with Nonvalvular Atrial Fibrillation to Warfarin and Its Influential Factors / 中国药房

OBJECTIVE:To improve medication compliance of patients with nonvalvular atrial fibrillation (NVAF) to warfarin and its influential factors,and to provide reference for guaranteeing the safety and effectiveness of therapy.METHODS:A questionnaire survey was conducted among NVAF patients receiving warfarin anticoagulation in our hospital,MMAS-8 and WRKS were adopted to evaluate medication compliance of patients to warfarin and the understanding of patients to the knowledge of anticoagulation treatment.Related influential factors for medication compliance of patients to warfarin were investigated by x2 test,t test and Logistic multiple regression analysis.RESULTS:Totally 129 questionnaires were sent out,and 112 were effectively received with effective recovery of 86.82％.The mean score of MMAS was (6.54 ± 1.61),and 42.86％ patients had good medication compliance.The mean score of WRKS was (7.95 ± 1.65);that of patients with good medication compliance was (9.31 ± 0.83),and that of patients with poor medication compliance was (6.92 ± 1.34).Single factor analysis showed that there was statistical significance in gender,age,occupation,educational level,the number of compliance,WRKS score between patients with good medication compliance and those with poor medication compliance (P＜0.05).Multivariate Logistic regression analysis showed that WRKS score,gender,educational level and the number of compliance were significantly correlated with medication compliance (P＜0.05).CONCLUSIONS:Poor medication compliance of NVAF patients to warfarin is related to multiple influential factors.The knowledge of warfarin anticoagulation is an important factor.

Preliminary application experience of GuidezillaTM guide extension catheter during complex coronary percutaneous coronary intervention procedure / 中国介入心脏病学杂志

Objective To evaluate the clinical safety and efficacy of GuidezillaTM guide extension catheter during complex coronary percutaneous coronary intervention(PCI). Methods A total of 13 patients were included in the studywho presented with complex coronary lesions during PCI. Stents or balloons could not be delivered to these complex lesions with conventional approach and GuidezillaTM guide extension catheters were used. Results Among these 13 patients,there were 7 CTO lesions,7 calcified lesions, 6 tortuous lesions,8 diffuse lesions,8 distal lesions and 8 lesions with pre-existing stents. PCI success rate was 100% .In one patient,GuidezillaTM guide extension catheter was obstructed which were relieved after stent implantation. There was no major adverse cardiac event(MACE) during follow-up.Conclusions The GuidezillaTM guide extension catheter was safe and effective for PCI of complex coronary artery lesions.

Associations of Human Leukocyte Antigen-DRB1 Alleles with Nasopharyngeal Carcinoma and Its Clinical Significance in Xinjiang Uyghur Autonomous Region of China / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Genetic susceptibility is one of the major etiological factors for nasopharyngeal carcinoma (NPC). Among the genetic predisposing factors, human leukocyte antigen (HLA) genes have been reported to be associated with NPC. This study aimed to investigate the associations of HLA-DRB1 alleles with NPC and the clinical significance of HLA-DRB1 alleles in NPC.</p><p><b>METHODS</b>From January 2009 to December 2013, 140 NPC patients (118 Han patients and 22 Uyghur patients) and 158 healthy controls (81 Han individuals and 77 Uyghur individuals) from Xinjiang Province were genotyped for HLA-DRB1 using the polymerase chain reaction-sequence specific primer technique. Chi-square analysis was used when comparing allele frequencies between groups. The clinical outcomes were evaluated by Kaplan-Meier method and Cox regression model.</p><p><b>RESULTS</b>Compared with healthy controls, the allele frequency of HLA-DRB1*0701 was increased in the Uyghur patients (P = 0.008) but not in the Han patients (P = 0.869). HLA-DRB1*0101 allele was presented with higher frequency in clinical Stage I + II group compared with clinical Stage III + IV group in the Han patients (P = 0.015) but not in the Uyghur patients (P = 1.000). Higher frequency of HLA-DRB1*1501 allele was observed in patients aged <45 years compared with those in patients aged ≥45 years (P = 0.002). Neither HLA-DRB1*0701 nor HLA-DRB1*0101 had a statistically significant association with 3-year survival.</p><p><b>CONCLUSIONS</b>This study found HLA-DRB1*0701 in Uyghur population was associated with an increased risk of developing NPC. In Han population, we found HLA-DRB1*0101 was associated with protection from disease progression, and HLA-DRB1*1501 was associated with early age of onset. HLA-DRB1 could not be identified as a prognostic indicator for NPC in either Han or Uyghur patients.</p>

Role of PARP-2 in cardiac hypertrophy in rats / 中国病理生理杂志

AIM:To investigate the expression of poly(ADP-ribose) polymerase-2 (PARP-2) during rat car-diac hypertrophy in vitro and in vivo, and to explore the effects of PARP-2 on the cardiac hypertrophy.METHODS:Ab-dominal aortic coarctation ( AAC) was performed to establish a model of pressure overload-induced cardiac hypertrophy in SD rats.The expression of PARP-2 at mRNA and protein levels in the myocardium was determined by real-time PCR and Western blot.The hypertrophy model of the cardiomyocytes was induced by treating the cells with angiotensinⅡ( AngⅡ) . PARP-2 was knocked down by siRNAs in neonatal rat cardiomyocytes and the cardiomyocyte hypertrophy was evaluated by measuring the mRNA levels of ANF, BNP, and β-MHC and the cellular surface area.RESULTS: The expression of PARP-2 at mRNA and protein levels was both increased in the AAC rats as compared with those in the sham animals.The expression of PARP-2 at mRNA and protein levels was also increased in a time-and concentration-dependent manner in AngⅡ-induced hypertrophy model of the cardiomyocytes.In the neonatal rat cardiomyocytes, knockdown of PARP-2 ex-pression by siRNA attenuated AngⅡ-induced cardiac hypertrophy of the cardiomyocytes, indicating that endogenous PARP-2 played a positive regulatory role in cardiac hypertrophy.CONCLUSION:The mRNA and protein levels of PARP-2 in-crease in the in vitro and in vivo models of cardiac hypertrophy.Knockdown of PARP-2 protects cardiomyocytes from hyper-trophy.

Scalp acupuncture combined with body acupuncture for 32 cancer cases with intractable hiccups after radiochemotherapy / 针灸推拿医学（英文版）

Objective:To observe the therapeutic effect of scalp acupuncture combined with body acupuncture in treating cancer patients with intractable hiccups after radiochemotherapy. Methods:Thirty-two cancer patients with intractable hiccups after radiochemotherapy who met the inclusion criteria were selected. The Line 2 Lateral to Forehead (MS 3) of scalp stimulation areas as well as body acupoints including Danzhong (CV 17), Zhongwan (CV 12), bilateral Cuanzhu (BL 2), Neiguan (PC 6), Zusanli (ST 36) and Taichong (LR 3) were punctured. The treatment was given once a day, 5 treatments constituted a course, and the efficacy was evaluated after 2 treatment courses. Results:After 10 treatments, 26 cases were cured, 4 cases were improved, and 2 cases were invalid, and the total effective rate was 93.8%. Conclusion:Scalp acupuncture combined with body acupuncture in treating intractable hiccups in cancer patients after radiochemotherapy has reliable therapeutic effect, and it is easy-to-operate and can effectively alleviate the suffering of patients with less adverse reaction.

Association of toll-like receptor 4 polymorphisms with type 2 diabetes mellitus.

Toll-like receptor 4 (TLR4) plays important roles in modulating innate immunity. Type 2 diabetes mellitus (T2DM) is a chronic and complex disease that is characterized by impaired insulin resistance and dysregulated immune response. In the current study, we investigated whether TLR4 polymorphisms were correlated with susceptibility to T2DM in the Chinese population. Four TLR4 polymorphisms (-2431T/C, Asp299Gly, Thr399Il3, and +3725G/C) were genotyped in 936 T2DM patients and 978 healthy controls. Results showed that the prevalence of TLR4 +3725GC and CC genotypes was significantly decreased in T2DM cases than those in controls [odds ratio (OR) = 0.68, 95% confidence interval (CI) = 0.55-0.84, p = 0.0003, and OR=0.46, 95% CI = 0.32-0.67, p = 3.71 × 10(-5) , respectively). Also, the frequency of TLR4 +3725C allele was significantly lower in T2DM patients (p = 2.50 × 10(-8) ). The -2431T/C did not reveal any significant differences between cases and controls. We did not detect Asp299Gly and Thr399Il3 polymorphisms in our study group. Stratification analysis of the clinical features in the patients demonstrated that frequency of +3725CC genotype was lower in patients older than 50 years old (p = 0.047). In conclusion, these results indicate that TLR4 +3725G/C polymorphism may be a novel protective factor against T2DM in the Chinese population.

Effect of different parameters Er: YAG laser irradiation on the structure of dental hard tissue / 中国基层医药

Objective To investigate the effect of Er:YAG laser irradiation on the structure of dental hard tissue.Methods 2 teeth (8 samples) were randomly selected from 26 teeth enamel group(104 samples) for blank control(group C).The remaining 24 teeth (96 samples) were randomly divided into A group (irradiation 10 s) and B group (20 s irradiation),each group according to power were randomly divided into 1,2,3,4,5,6 W six subgroups,each subgroup had 8 samples.Using a Er:YAG laser at 20 Hz frequency,according to the corresponding packet (with different power and different irradiation time) were irradiated for each sample.Dentin grouped with enamel group.To observe the changes of different energy and the pit diameter and depth.Results The enamel surface pit diameter was compared by different irradiation time and power,different power within the same irradiation time (t =1.89,2.02,2.76,1.98,1.37,1.42,all P ＜ 0 05) ; compared between B group and the A group under the same power (t =1.23,3.23,2.04,1.45,1.42,1.87,all P ＜ 0.05).The enamel surface pit depth was compared by different irradiation time and power,different power within the same irradiation time (t =1.15,3.09,2.32,1.76,1.51,1.59,all P ＜ 0.05) ;compared between B group and the A group under the same power (t =1.15,3.09,2.32,1.76,1.51,1.59,all P ＜0.05).The dentin surface pit diameter was compared by different irradiation time and power,different power within the same irradiation time (t =1.15,3.09,2.32,1.76,1.51,1.59,all P ＜ 0.05) ; compared between B group and the A group under the same power(t =1.15,3.09,2.32,1.76,1.51,1.59,all P ＜ 0.05).The dentin surface pit depth was compared by different irradiation time and power,diffe rent power within the same irradiation time (t =2.12,2.04,1.82,1.43,1.31,1.76,all P ＜ 0.05) ; compared between B group and the A group under the same power(t =2.34,3.13,2.76,1.45,1.34,1.62,all P＜0.05).Conclusion With the increase in the laser energy and the irradiation time,the diameter and depth of enamel pits produced also continuously increase;With the increase in the laser energy and the irradiation time,dentin diameter and depth of the pits produced constantly increased.The different parameters of Er:YAG laser irradiation of dental hard tissues have different effects on the structure.

Study on the microleakage of Er: YAG laser reserve pit and fissure filling / 中国基层医药

Objective To seek the least damage to tooth structure and method of treatment to obtain the minimal microleakage.Methods 600 posterior teeth in vitro constant,according to the random number table method,were divided into 6 groups:A,B,C,D,E,F,l00 cases in each group.The pigmentation of deep pit and fissure or pit and fissure caries of the suspicious isolated human premolar were selected as observation objects,respectively.a Er:YAG laser,a high-speed diamond bur and clean cup brush were used to prepare for isolated anterior molar occlusal pit and fissure.And the performance of each sample was filled with light curing composite resin and fluid,Six different filling conditions of filling body and fissure between microleakage and bonding interface were observed by dye penetration method and scanning electron microscopy.Results The efficiency of F group was 99％,which was significantly higher than 87％ of C group (χ2 =5.84,P ＜0.05),55％ of D group(χ2 =7.21,P ＜0.05) and 87％ of E group (χ2 =11.65,P ＜ 0.05).The efficiency of C group was 87％,which was significandy higher than 43％ of A group (χ2 =3.97,P ＜ 0.05) and 61％ of B group (χ2 =8.35,P ＜ 0.05).The efficiency of B group was 61％,which was significantly higher than 43％ of A group (χ2 =6.25,P ＜ 0.05).Conclusion Er:YAG laser with fluid resin filling is the most effective way for the clinical treatment of pit and fissure deep narrow,already susPicious pit and fissure caries pit and fissure sealant failed teeth.

Combined prognostic utility of NT-proBNP and hs-CTNI in NSTE-ACS risk stratification and its therapy / 重庆医学

Objective To research the combined prognostic utility of NT-proBNP and hs-CTNI in NSTE-ACS risk stratification and early intervention therapy .Methods A total of 245 NSTE-ACS patients were divided to 4 groups(Aa ,Ab ,Ba ,Bb groups) ac-cording to immediate admission NT-proBNP and hs-CTNI .Patients were accepted percutaneous coronary intervention (PCI) ,coro-nary artery bypass grafting and conservative treatment were taken 6 months follow-up .Results The heart failure incidence of Aa group was significantly higher than Ba group(P0 .05) .In 6 months follow-up ,5 patients died and 10 patients accepted revascularization again because of severe angina and AMI .Conclusion In NSTE-ACS patient ,NT-proBNP and hs-CTNI elevation was closely related with severe coronary lesions and worse prediction ,which could undergo early in-tervention therapy .

Controlling the length of plasma waveguide up to 5 mm, produced by femtosecond laser pulses in atomic clustered gas.

We report the observation of longitudinally uniform plasma waveguide with a controlled length of up to nearly 5 mm, in argon clustered gas jet. This self-channeling plasma is obtained using a 35 mJ, 30 fs FWHM pulse as a pump laser pulse to create the plasma channel. A 1 mJ pulse of the same laser is used for probing the plasma channels using interferometric diagnostics. The radial distribution of the electron density confirms the formation of a plasma waveguide. Clustered argon enhances the absorption efficiency of femtosecond pulses which enables the use of pump pulses of only 35 mJ, approximately 10 times less energy than required for heating conventional gas targets. The plasma channel length is controlled by the laser focus point (F), the laser intensity (I), the pump-probe delay time (t) and the laser height from a nozzle (z). The variation of the electron density for these parameters is also studied. We found that the highest density of 1.2 x 10(19) cm(-3) was obtained at I = 5.2 x 10(16) W/cm(2), z = 2 mm and t = 7.6 ns. It was demonstrated that by using a clustered jet, both the plasma waveguide length and the plasma density could be controlled.

Relationship between accelerated artherosclerosis and Treg/Teff balance in uremic apoE-/- mice / 南方医科大学学报

<p><b>OBJECTIVE</b>To establish a uremic apolipoprotein E knockout (apoE-/-) mouse model and explore the relationship between accelerated atherosclerosis and Treg/Teff balance.</p><p><b>METHODS</b>Using apoE-/- mice with C57BL/6J background, uremic apoE-/- mice were created by electrocautery of the right kidney and nephrectomy of the left, and the control apoE-/- mice received a sham-operation. Two weeks after inducing uremia, the renal function of the mice were evaluated to assess the validity of the model. Ten weeks after the operation, blood samples were obtained from the mice to assess the renal function and serum total cholesterol (TCH); the serum concentrations of transforming growth factor-beta(1) (TGF-beta(1)) and interferon-gamma (IFN-gamma) were detected by ELISA, and CD4(+)CD25(+)Foxp3(+)Treg ratio in the spleen was determined by flow cytometry. RT-PCR was used to detect the expression of Foxp3 and IFN-gamma mRNA in the aorta, and oil red O staining used to investigate the relative atherosclerotic area on the frozen sections of the aortic root. The correlation between the renal function parameters and Treg quantity was analyzed.</p><p><b>RESULTS</b>Renal function detection confirmed successful establishment of the uremic apoE-/- mouse model. Ten weeks after the operation, the relative atherosclerotic plaque area in the aortic root plaque increased significantly, the spleen Treg ratio decreased, the serum concentrations of TGF-beta(1) decreased and IFN-gamma and TCH increased, the expression of aortic Foxp3 mRNA decreased and IFN-gamma mRNA increased as compared with those in the control apoE-/- mice. A significant inverse correlation was found between the renal function parameters and Treg quantity in uremic apoE-/- mice.</p><p><b>CONCLUSION</b>In uremic apoE-/- mice, accelerated aortic atherosclerosis is correlated to the T cell subset (Treg/Teff) imbalance shown by decreased quantity and impaired function of Treg and enhanced activity of Teff.</p>

Expression and function of voltage-gated Na+ channel isoforms in rat sinoatrial node / 南方医科大学学报

<p><b>OBJECTIVE</b>To detect the expression of voltage-gated Na(+) channel (NaCh) isoforms in rat sinoatrial node and explore their functions.</p><p><b>METHODS</b>Expressions of NaCh isoforms Nav1.1, Nav1.2, Nav1.3, Nav1.5, Nav1.6 and Nav1.7 in the rat sinoatrial node were detected by immunohistochemistry. The functional roles of the NaChs were tested by observing the effect of tetrodotoxin, a specific blocker of NaChs, on the intrinsic heart rate of isolated rat working heart.</p><p><b>RESULTS</b>The tetrodotoxin- sensitive neuronal isoforms Nav1.1, Nav1.6 and Nav1.7 as well as the tetrodotoxin-resistant cardiac isoform Nav1.5 were present in the rat sinoatrial node, and the neuronal isoforms were more abundant than Nav1.5 (P<0.05). The selective blockade of tetrodotoxin-sensitive isoforms (presumably Nav1.1, Nav1.6 and Nav1.7) by 100 nmol/L tetrodotoxin scarcely affected the intrinsic heart rate (0.5-/+2.9%, P>0.05) while blockade of tetrodotoxin-resistant isoform (presumably Nav1.5) by 2 micromol/L tetrodotoxin resulted in an obvious decline in the intrinsic heart rate (22.1-/+2.1%, P<0.001).</p><p><b>CONCLUSIONS</b>Nav1.1, Nav1.5, Nav1.6 and Nav1.7 are all present in rat sinoatrial node. Although neuronal isoforms are more abundant, Nav1.5 seems to contribute more to activity of the sinoatrial node.</p>