Objective To evaluate the changes of left ventricular regional function in normal subjects with aging and the influencing factors by Doppler tissue imaging. Methods One hundred and twelve normal subjects were divided into four groups according to age: I group with age≤18 years old ; II group with 18 60 years old. Using a quantitative tissue velocity analysis system and tissue tracking, the peak velocities of different ventricular segments at systole, early and late diastole (Vs, Ve,Va) , the Ve/Va ratios were obtained and the effects of age, gender, heart rate and STd were analyzed. Results (1) Peak velocities of different segments of each wall were decreased one by one from mitral annulus, the basal, middle segment to the apical portion. (2) Peak velocities of different ventricular walls were significantly different, with the antero- and posterio-inter-ventricular septum being the lowest CVe (6. 89?2. 60) ,(7. 94?2. 64)cm/s]and with the latero-,posterio-,antero, and inferior walls of the left ventricle being higherCVe (9. 85?3. 02) , (9. 80?3. 09), (8. 86?3. 16), (8. 23?2. 48) cm/s] . (3) Peak velocities of different segments were associated with age, STd, BMI, heart rate and not associated with gender. (4) The Ve/Va ratios were increased one by one from mitral annulus, basal, middle segment to apical portion, and were significantly lower in III group and IV group than in I group and II group. Conclusions Peak velocities of different segments at different walls change regularly and age is the most important influencing factor to the diastolic velocities.

Objective To establish an HPLC method for determination of related substances of dexmethylphenidate hydrochloride and their content .Methods The HPLC method was used on an Agilent ZORBAX SB-C18 column with a mo-bile phase of methanol-0.2%triethyl citrate in 25 mmol/L potassium dihydrogen phosphate ( pH was adjusted to 3.5 with phosphoric acid) (35∶65) at a flow rate of 1.0 ml/min.The detection wavelength was 209 nm and column temperature was 40℃.Results Under the selected chromatographic condition , dexmethylphenidate hydrochloride was completely separated from impurity.The limit of detection was 81.12 ng/ml.The calibration curve was linear in the range of 2-30 μg/ml ( r=0.9995).The average recovery of the method was 100.83%, and the stability of the working solution was acceptable in 12 h(RSD=0.10%).Conclusion This method is simple,specific,accurate and suitable for analyzing the related substances and their content in dexmethylphenidate hydrochloride .

Objective To optimize the formulation of metoprolol succinate ( MS) controlled release pellets by central composite design-response surface methodology .Methods MS sustained-release pellets were prepared using sugar pellet cores as starter beads , ethyl cellulose as coating materials and MS itself as a pore former .The formulation of MS sustained-release pellets was optimized by a central composite design with two factors at five levels .These two factors ( two independ-ent variables) were the pore former level and coating level , and the evaluated indexes ( namely dependent variables ) included the in vitro cumulative release percentages of MS at 1, 4, 8, 12 and 16 h, respectively.Results and Conclusion The results of mathematical equation fitting suggested that the second-order quadratic model was the optimal fitting equa-tion.According to the response surfaces , the optimum values at the pore former level and coating level weve ranged from 16%to 18%and 20% to 25%, respectively .The in vitro cumulative release percentage of MS from the pellets at 1 h reached 9.15%,which consequently eliminated the lag phase in the initial release period and exhibited a good sustained-release effect.Central composite design-response surface methodology can be applied to optimizing the coating formulation for MS sustained release pellets .

Objective To study the effect of surfactants on the dissolution profiles of poorly water-soluble acidic drug nimesulide from sustained-release tablets.Methods The anionic surfactant sodium dodecyl sulfate (SDS), cationic sur-factant cetyltrimethyl ammonium bromide (CTAB) and nonionic surfactant polysorbate 80 (Tween 80) were used to prepare nimesulide micelles .The effect of the buffer , surfactant and ionic strength on the equilibrium solubility of the drug and the in vitro release of sustained-release tablets was studied .Results and Conclusion In pH 1.2 HCl solution, water and pH 6.8 phosphate buffer, the solubilization capacity of CTAB was the highest.However, in pH 9.0 Tris buffer, when CTAB concen-tration was at about 1%, the equilibrium solubility of nimesulide was at the trough value .The in vitro release results were similar to those of equilibrium solubility and the kinetic pattern conformed to the first order equation according to the coefficient R .

Objective To establish assay methods for the determination of dissolution,content and related substances of vita-min K1 self-nanoemulsifying drug delivery system(VK1-SNEDDS),and investigate the physico-chemical properties of the preparation. Methods The UV method was established to determine the dissolution of VK1-SNEDDS. The content and related substances were de-termined by HPLC. The appearance,self-emulsification time,micro-morphology,droplet size and zeta potential were also investigat-ed. Results The linearity range of established UV and HPLC methods was 0.85-20.4 and 2.16-216μg/ml,respectively,and all the recovery,precision,specificity and sensitivity met requirements. VK1-SNEDDS could disperse quickly after dilution. The transmission electron microscope(TEM)image of the optimized liquid SNEDDS showed that most of the emulsion droplets were of uniform size with no signs of coalescence. Droplet size of optimal formulation was revealed as 47.74 nm with polydispersibility index(PDI)of 0.248,and zeta potential was found to be-20.53 mV. Conclusion VK1-SNEDDS could form homogeneous and stable nanoemulsion when dilut-ed with aqueous phase and increase the dissolution of lipophilic drug. The methods are reliable,accurate and suitable for quality con-trol of VK1-SNEDDS.

Objective:To test the validity and reliability of the Chinese Version Scale of Social Skill for Nursing(C-SSSN).Methods:The Japanese version SSSN was translated into Chinese according to Beaton's Translation Model.Totally 547 clinical nurses who met the criterion in a tertiary hospital in Yinchuan were selected for analyzing the items and investigating content validity,structure validity and internal consistency reliability.After 2 weeks,30 nurses were randomly selected for reassessment.Results:The content validity index (S-CVI) of C-SSSN was 0.87,the items content validities (I-CVI) varied from 0.86-1.00.Exploratory factor analysis was employed for extracting the 7 common factors and conformed 6 dimensions.The loads of items in the common factors were 0.43-0.88 correspondingly.The cumulative contribution rate was 60.38％.The Cronbach alpha coefficient of the scale was 0.89,the alpha coefficients of the 6 dimensions arranged 0.76-0.93.The retest reliabilities (r) were 0.83 for the total scale and 0.77-0.83 for the six dimensions.Conclusion:The Chinese Version Scale of Social Skill for Nursing has been proved to be reliable and valid which could be used to evaluate clinical nurses' social skill.

Objective To explore the correlation between depressive symptoms and frailty,in order to provide evidence for prevention and relief of depressive symptoms in elderly inpatients.Methods A cross-sectional survey and comprehensive geriatric assessment(CGA)were conducted with 248 eligible elderly inpatients from December 2015 to February 2017 in our hospital.Depressive symptoms were assessed by the 5-Item Geriatric Depression Scale(GDS-5),and frailty was identified by the frailty phenotype method.Results In all respondents,50 (20.2 ％)patients showed depressive symptoms,93(37.5 ％)patients had pre-frailty and 39 (15.7 ％)patients had frailty.Correlation analysis showed that frailty degree,low grip strength,slow gait speed,low physical activity,fatigue,and weakness were all positively correlated with depressive symptoms in elderly inpatients (r =0.441,0.315,0.426,0.316,0.395 and 0.151,respectively,P ＜ 0.05).Logistic regression analysis showed that patients who had more severe frailty faced a much higher risk of developing depressive symptoms (OR=2.608,P＜0.05).Of the 5 indicators of frailty,slow gait speed and frailty also increased the risk of having depressive symptoms (OR =2.801 and 3.484,P ＜ 0.05).Conclusions Frailty degree,gait speed and fatigue are associated with increased risk of depression in the elderly.Depressive symptoms can be reduced in elderly inpatients with prevention and intervention of pre-frailty and frailty.

OBJECTIVE: To investigate the expression of EMS1 and DcR3 in laryngeal carcinoma and analyze the relation of EMS1 and DcR3. METHOD: The expression of EMS1 and DcR3 protein in 41 laryngeal carcinoma fresh samples and 41 para-carcinoma tissues (to cutting margin > 0.5 cm) were measured by flow cytometry, and 15 normal laryngeal mucosa samples were also studied as controls. RESULT: (1) The quantitative and qualitative expression of EMS1 and DcR3 protein in laryngeal carcinoma tissues was obviously higher than those in para-carcinoma and in normal laryngeal mucosa tissues respectively (P < 0.05). There was no significant difference between the expression of para-carcinoma and normal laryngeal mucosa tissues. (2) In laryngeal carcinoma, the expression of EMS1 and DcR3 protein was independent of patients' clinical classification, tumor size, smoking history, patients' age and sex but associated with tumor metastasis, pathological grade and clinical stage. (3) In laryngeal carcinoma, the expression of EMS1 was positively correlated with that of DcR3. CONCLUSION EMS1 was positively related to DcR3, which might play an important role in the carcinogenesis and development of laryngeal carcinoma by synergic effect.
Adult ; Aged ; Cortactin ; metabolism ; Female ; Flow Cytometry ; Humans ; Laryngeal Neoplasms ; metabolism ; pathology ; Male ; Middle Aged ; Neoplasm Staging ; Receptors, Tumor Necrosis Factor, Member 6b ; metabolism

Objective:To investigate the overlapping prevalence and risk factors of gastroesophageal reflux disease (GERD), functional dyspepsia (FD) and irritable bowel syndrome (IBS) among rural adults in Shaanxi Province.Methods:From February 1 to October 31 in 2019, 12 villages in Shaanxi Province were randomly selected for household questionnaire survey through multistage stratified cluster sampling. A total of 2 423 subjects were enrolled, including 1 037 males and 1 386 females, with age of (45.3±16.9) years old. GERD was diagnosed according to the Montreal criteria, FD and IBS were diagnosed according to the Rome Ⅳ criteria. The overlapping prevalence of the three diseases were calculated. The risk factors for the overlapping of GERD, FD and IBS were analyzed. Multivariate logistic regression was used for statistical analysis.Results:Among the 2 423 subjects, 624 cases had GERD (302 cases), FD (377 cases) or IBS (167 cases), of which 30.77% (192/624) patients had overlap of ≥two diseases. The overlap rates of GERD and FD, GERD and IBS, FD and IBS, GERD, FD and IBS were 2.56% (62/2 423), 1.61% (39/2 423), 2.52% (61/2 423) and 1.24% (30/2 423), respectively. The results of Multivariate analysis showed that female and migraine without aura were positively correlated with the overlap of GERD and FD, FD and IBS, and GERD and IBS (odds ratio ( OR)=3.08, 2.68, 3.66, 7.37, 5.91 and 4.46, 95% confidence interval ( CI) 1.35 to 7.01, 1.35 to 5.30, 1.52 to 8.83, 3.97 to 13.69, 1.78 to 19.60 and 2.01 to 9.92; all P<0.05). Heavy drinking (alcohol intake≥50 g/d (male) or≥30 g/d (female)) was positively correlated with the overlap of FD and IBS, GERD and IBS, and GERD, FD and IBS ( OR=3.69, 4.20 and 4.91, 95% CI 1.19 to 11.48, 1.01 to 17.50 and 1.23 to 19.52; all P<0.05). Heavy smoking (smoking≥20 cigarettes per day) was positively correlated with the overlap of GERD and FD, FD and IBS, GERD and IBS, and GERD, FD and IBS ( OR=3.44, 6.25, 8.27 and 7.04, 95% CI 1.07 to 11.01, 1.60 to 24.44, 1.80 to 38.07 and 1.76 to 28.12; all P<0.05). The educational level of junior or senior high school and age≥60 years old were negatively correlated with the overlap of GERD and FD, FD and IBS, GERD and IBS, and GERD, FD and IBS ( OR=0.47, 0.29, 0.20, 0.05, 0.23, 0.10, 0.37 and 0.16, 95% CI 0.23 to 0.93, 0.09 to 0.95, 0.09 to 0.42, 0.01 to 0.19, 0.09 to 0.60, 0.02 to 0.65, 0.15 to 0.87 and 0.03 to 0.81; all P<0.05). Conclusions:The overlap of GERD, FD and IBS is common and affected by many factors. Female, age≥60 years old, heavy smoking, heavy drinking, low education level and history of migraine without aura are associated with multiple overlaps of GERD, FD and IBS.

Background: Previous studies showed controversial findings for correlation of periodontal disease and cognitive deficits. Methods: We searched systematically for studies pertaining to correlation of periodontal disease and cognitive deficits published between August 1980 and December 2019 on Web of Science and PubMed. We combined the data extracted from the included studies to determine the correlation between periodontal disease and cognitive deficits. Results: Our analysis indicated a higher risk of cognitive deficits in those with moderate to severe periodontal disease when compared to those with mild or no periodontal disease (odds ratio (OR) = 1.38 (95% confidence intervals (CI): 1.28-1.48). Subgroup analysis showed significant correlations in only case-control and cohort studies (case-control studies: OR = 1.49 (95% CI: 1.24-1.80); cohort studies: relative risk (RR) = 1.33 (95% CI: 1.22-1.45)). Subgroup analysis also indicated that moderate to severe periodontal disease was correlated to increased dementia and Alzheimer disease risks, whereas no significant correlation was found between periodontal disease and mild cognitive impairment (dementia: OR/RRs = 1.32 (95% CI: 1.22-1.44); Alzheimer disease: OR/RRs = 1.51 (95% CI: 1.20-1.90); Mild cognitive impairment: OR/RRs = 1.31 (95% CI: 0.89-1.94)). Furthermore, subgroup analysis showed significant correlations between cognitive deficits and tooth loss, periodontitis, whereas no significant correlation was found between deep periodontal pockets and cognitive deficits (tooth loss: OR/RRs = 1.57 (95% CI: 1.39- 1.77); periodontitis: OR/RRs = 1.43 (95% CI: 1.03-2.00); deep periodontal pockets: OR/RRs = 1.24 (95% CI: 0.77-2.00)). Conclusions: This review suggests a significant correlation between periodontal disease and cognitive deficits. Interventional studies for periodontal disease may be beneficial for patients with cognitive deficits