Objective To investigate the effects of ultrasound irradiating hydroxycamptothecin (HCPT)-loaded microbubbles on apoptosis in human hepatoma SMMC-7721 cells, and to clarify its probable mechanism. Methods The SMMC-7721 cells were randomly divided into six groups as follows: control group, blank liposome microbubbles plus ultrasound, HCPT-loaded microbubbles, HCPT, HCPT plus ultrasound,and HCPT-loaded microbubbles plus ultrasound. Apoptosis was ascertained by Annexin V-Fire/ PI and TUNEL methods. The expression of Bcl-2 and Bax protein was detected by immunocytochemistry staining technique. Results In the group of HCPT-loaded microbubbles plus ultrasound,the apoptosis rate at early term was found to reach (12.18 ± 1.38)% by Annexin V-Fitc/PI assay, brown-colored positive apoptotic cells were observed and the apoptosis rate at advanced term was found to reach (34.25 ± 1.83)% with TUNEL method. The expression of Bcl-2 was found to decrease,the expression of Bax increase,and the ratio of Bcl-2/bax significantly decrease by immunocytochemistry staining technique in the same group. Differences with other groups were significant. Conclusions The method of ultrasound irradiating HCPT-loaded microbubbles can notability induce human hepatoma SMMC-7721 cells apoptosis. The decrease in the ratio of Bcl-2 to Bax might be responsible for cells apoptosis.

OBJECTIVE: To analyze the therapeutic effect of proton pump inhibitor(PPI) on alleviation of hoarseness symptoms in patients with laryngopharyngeal reflux(LPR). METHOD: The LPR outpatients in ENT department of our hospital(60 cases)complained of hoarseness were enrolled in the study from August of 2013 to October of 2014. All of them were randomly divided into group A and B. The individuals in group A (30 cases) taked golden voice capsule to treat for 3 months, while the individuals in group B (30 cases) taked golden voice capsule and omeprazole to treat for 3 months. The data about reflux symptom index (RSI), reflux finding score (RFS) and voice handicap index (VHI)from the first month to the third month after treatment were recorded and compared group A with group B. RESULT: The scores of RSI and RFS in patients (60 cases) before treatment were significantly correlated with their VHI (r=0. 823, P<0. 01; r=0. 873, P<0. 01). The score changes of RSI and VHI from the first to the third month after treatment in group B were significantly higher than those in group A (P<0. 01). Meanwhile, the score changes of RFS from the third month after treatment in group B were significantly higher than those in group A (t=8. 307, P<. 01), but the differences were not significant for RFS from the first to the second month after treatment between group A and group B(t=1. 128, P>0. 05; t=0. 376, P> 0. 05). CONCLUSION PPI therapy could significantly alleviate the hoarseness symptom in LPR patients.
Hoarseness ; drug therapy ; Humans ; Laryngopharyngeal Reflux ; drug therapy ; Proton Pump Inhibitors ; therapeutic use

Traditional T vector cloning method requires onerous procedures for identifying recombinant, and directional cloning was impossible. In order to overcome these problems, we have devised a directional T vector pETG based on pET-23a(+). For gene cloning, 7 bp partial LacO sequence was introduced into DNA fragment to reconstitute a full length LacO with Bfu I digested T vector. After transformation, blue colonies were selected on LB plate supplemented with X-gal. Restriction enzyme digestion and PCR identification showed that all blue colonies contained the directionally inserted recombinants and the recombinant efficiency was nearly 100%. We have successfully cloned 103 genes from human liver cDNA; in the study complicated procedures for screening of recombinant were not required. Eight pETG clones were picked for protein expression, and all the clones successfully produced corresponding proteins. We demonstrated that the directional T vector was successfully constructed, and it was very suitable for gene cloning and expression.
Cloning, Molecular ; methods ; DNA, Complementary ; biosynthesis ; genetics ; Escherichia coli ; genetics ; metabolism ; Gene Expression ; genetics ; Genetic Vectors ; genetics ; Humans ; Liver ; chemistry ; Polymerase Chain Reaction ; methods ; Recombinant Proteins ; biosynthesis ; genetics

Objective:To explore the in-depth experience of nursing undergraduates′ management experience and managed experience in open laboratory. Analyze management problems and offer suggestions.Methods:Using qualitative research methods and purposive sampling, from April to May of 2019, 40 nursing undergraduates were selected. Semi-structured interview was adopted to interview them and Colaizzi seven-step method was used to analyze the data.Results:Nine themes were grouped into three major parts including work content and feeling of lab assistant, students′ feelings about the management, their needs and suggestions.Conclusions:Teaching departments should pay attention to the feelings of nursing students, and encourage them to jointly build a simulative clinical environment. According to the needs of students, teachers should improve the effectiveness of practice in open laboratory by setting supporting facilities and establish a post practice evaluation.

OBJECTIVE: To detect the expression of miR-126 in different tissues and organs and the change of peripheral blood glucose in microRNA-126 knock down (miR-126 KD) mouse, and to explore the pathological significance. METHODS: Total RNAs were isolated from twelve kinds of tissues and organs in wild-type mouse (WT) and miR-126 KD mouse respectively. Th en, the expression level of miR-126 was detected by real-time PCR assay. Th e levels of peripheral blood glucose and body weight of miR-126 KD mice were measured. Th e pathologic changes of pancreas and lung tissue were observed by HE staining. RESULTS: Compared with the WT mice, the relative expression of miR-126 in spleen, liver, muscle and lung from the miR-126 KD mice were dramatically decreased respectively (P<0.05). The level of peripheral blood glucose in the miR-126 KD mouse increased significantly at seven week and sixteen week after the birth (P<0.05). HE staining showed that the pathological structure of pancreas and liver were abnormal. The body weight of miR-126 KD mice was increased obviously from thirteen week after birth (P<0.05). CONCLUSION Peripheral blood glucose levels in the miR-126 KD mouse were dramatically elevated, which might be related to the pathological changes in the structure of pancreas and liver. These results suggest that miR-126 may play an important role in the metabolism of blood glucose and the development of type 2 diabetes mellitus.
Animals ; Blood Glucose ; analysis ; Body Weight ; Diabetes Mellitus, Type 2 ; Gene Knockdown Techniques ; Liver ; pathology ; Mice ; MicroRNAs ; genetics ; Pancreas ; pathology ; Real-Time Polymerase Chain Reaction

【Objective】 To study the relationship between the key influencing factors and the short, medium and long term blood demand, so as to provide basis for building a blood demand prediction model with less prediction error and practical guidance. 【Methods】 Through literature research, the influencing factors of blood demand were preliminarily determined. Questionnaires were designed and distributed to relevant experts, and factor analysis was carried out on the survey results to obtain key influencing factors through Delphi method. 【Results】 Through literature research, 19 influencing factors of clinical blood demand were obtained, including policy factors, medical service demand, medical technology level, regional population, population characteristics, population structure, medical resource, number of beds, culture, natural environment, operation, patients outside the region, blood use in different departments, blood infusion, time trend, emergencies and disasters, the condition of disasters, hospitals in disaster area, limited diagnosis and treatment ability. Through Delphi method and data analysis, six key factors affecting blood demand were obtained, namely sudden disaster, medical resource, environmental factor, population, bed number and blood infusion. 【Conclusion】 The influence of key factors on clinical blood demand was divided into multiple hierarchies. Blood infusion and sudden disaster were short-term influencing factors. Medical resource, population and number of beds were medium influencing factors. Environmental factor was long-term influencing factor. Short, medium and long-term influencing factors were interrelated, and have different impacts on clinical blood demand. Based on the interaction relationship, a three-dimensional mathematical model of influencing factors of clinical blood demand was established, which provided a preliminary research basis for building a blood demand prediction model with less prediction error and practical guidance.

【Objective】 To establish a prediction model of clinical blood demand in Suzhou urban area by ARIMA model, and to predict future clinical blood demand by sorting out the historical data, so as to guide the reasonable collection and scientific deployment of blood resources, and achieve the balance of clinical blood supply and demand. 【Methods】 The monthly data of clinical use of plasma components in Suzhou city from 2009 to 2019 were obtained, and analyzed by SPSS26 software and ARIMA model. Through model identification, parameter estimation and optimal model test, the optimal model for clinical blood prediction was determined and used to predict the clinical consumption of plasma components from January to November 2020. The predicted value was compared with the actual value to verify the prediction effect of the model. 【Results】 The optimal model was ARIMA(0, 1, 1)(0, 1, 1)12. The values of ACF autocorrelation function and PACF partial autocorrelation function of residual were both within 95%CI. Meanwhile, the Yang-Box Q statistic value was 11.596, P>0.05, which passed the white noise test. The predicted values of clinical consumption of plasma components in Suzhou urban area from January to November 2020 were all within 95%CI, consistent with the trend of actual values, with small mean relative error(7.9%) and good prediction effect. 【Conclusion】 ARIMA model can be used for short-term prediction on clinical use of plasma components in Suzhou city, and provide reference for reasonable collection, preparation and scientific deployment.