Objective To perform thermoluminescent measurements of radial dose function and anisotropy function of a newly designed 192Ir microSelectron-HDR source, and establish evaluation methods for HDR dosimetry.Methods A polystyrene phantom with sylindrical holes in different measure positions was designed to accommodate thermo luminescent dosimeter (TLD) rods and radiation source.TLD rods with similar sensitivity were placed on a semicircle around the source center which had been precisely localized by either radiographic means or dose measurement.Dose-rates were measured at θ = 90° and r = 1-14 cm to calculate radial dose function (gL (r)), while measured along polar angles θ = 0° -165°(interval 15°) at radial distances r = 1 cm, 3 cm and 5 cm to calculate anisotropy function (F(r,θ)).All data were compared with those calculated by Monte Carlo (MC) method.The t-test was used for the statistics.Results The values of gL (r) were 1.007 -0.681 by calculation and 1.007 -0.598 by measurement with r = 1 - 14 cm(t = 0.00 - 2.89, all P > 0.05).The values of F (r,θ) were 0.631 - 1,0.660 - 1 and 0.696 - 1 by calculation, while 0.701 - 1, 0.668 - 1 and 0.629 - 1 by measurement at 1 cm, 3 cm and 5 cm with θ=0° -165°(t=0.40 -1.63, 0.02 -2.10, 0.08 -2.03, all P>0.05).Conclusions The results of radial dose function and anisotropy function measured by TLD measurement are in consistent with those calculated by MC calculations, which can be applied in treatment planning system as original input.

Objective To investigate the relationship between social support and subjective well-be-ing in only-child-lost ( OCL ) people, and the mediating effect of self-efficacy in this relationship. Methods By stratified cluster sampling,206 only-child loss people were investigated with Social Support Rating Scale ( SSRS) ,General Self-Efficacy Scale ( GSES) and Index of Well-Being ( IWB) ,and data were analyzed with SPSS19.0 software and Amos17.0 software. Results ①Scores of SSRS,GSES and IWB in only-child-lost people were(31.78±8.18),(24.12±0.67) and (8.38±3.05). ②Correlation analysis showed that scores of GSES,SSRS and 3 dimensions of SSRS were positively correlated with scores of IWB ( r=0. 542,0.332,0.214,0.332,0.216;P<0.05) . ③Self-efficacy partially mediates the relationship between social support and subjective well-being through mediating effect test(χ2/ df=1.986,GFI=0.985,AGFI=0.942, RMSEA=0.069),mediating effect accounted for 16.08%.Conclusion Social support is an important factor which plays a direct or indirect role in subject well-being. Self-efficacy is the intermediate link between social support and subject well-being.

Objective:To investigate the relationship between social support and depression of only-child-lost (OCL) people,and the mediation role of self-efficacy in this relationship.Methods:By stratified cluster sampling,214 OCL people were enrolled,with 80 males and 134 females,ages from 49 to 83 years old.They were assessed by General Self-Efficacy Scale,Social Support Rating Scale,and Self-rating Depression Scale.Results:Univariate analysis showed that there were significant differences in age groups (t=2.85,P＜0.05),with or without spouse (t=5.62,P＜0.05),family location (t=3.95,P＜0.05),per capita monthly income (F=3.48,P＜0.05) among the social support scores.There was significant difference between the per capita monthly income and self-efficacy scores in QCL people (F=5.46,P＜0.05).Correlation analysis showed self-efficacy and social support were positively correlated (r=0.26,P＜0.01).Self-efficacy (r=-0.59,P＜0.01) and social support (r=-0.59,P＜0.01) negatively correlated with depression in OCL people.Self-efficacy partially mediated the relationship between social support and depression.Conclusion:The person who is ＜60 years old,with spouse and the high per capita monthly income,and lives the rural area,would have high social support levels among QCL people.The person who has high per capita monthly income would have high self-efficacy.Self-efficacy is one of the direct prediction for depression,and plays an indirect role between social support and depression.Intervention of depression among OCL people could be applied to change their cognition,and to enhance their self-efficacy.

Objective:To screen for the bioactive marine organisms and to study the active constituents from them.Methods:Bioactivities of marine organisms extracts were screened by Pyricularia oryzae bioassay method and the constituents were isolated and identified by a combination of multi chromatography and spectral analysis.Results:Twenty ethanolic extracts and 5 aqueous extracts of the tested marine organisms showed activities causing morphological abnormality of P.oryzae mycelia.Fifty six compounds were obtained and identified from Sargassum carpophyllum,Ishige okamurai and Natarchus leachii freeri ,among which 28 compounds showed activities against P.oryzae and exhibited cytotoxicities on various cultured tumor cell lines,eight compounds showed inhibition effects on Fonsecaea pedrosoi in vitro .Conclusion:The screening data and bioactivity evaluation suggest the P.oryzae bioassay is suitable for preliminary screening of bioactive agents from marine organisms.

Objective:To investigate the effects and mechanisms of Yinzhihuang oral liquid on mice with high-fat diet induced non-alcoholic fatty liver disease (NAFLD).Methods:Eighteen C57BL/6J female mice were divided into normal diet group, high-fat diet group and Yinzhihuang oral liquid group, with six mice in each group. After hematoxylin-eosin staining, oil red O staining and Masson staining, pathological scores of liver biopsy slices were calculated. Plasma levels of triacylglycerol, total cholesterol, total bilirubin, alanine aminotransferase (ALT) and aspartate aminotransferase (AST) were tested. The composition of bile acid in mouse ileum content were measured by high performance liquid chromatography-tandem mass spectrometry, which included tauro-β-muricholic acid (TβMCA), ursodeoxycholic acid (UDCA) and cholic acid. The expression of farnesoid Ⅹ receptor ( FXR), fibroblast growth factor 15 ( FGF15), fibroblast growth factor receptor 4 ( FGFR4) genes at mRNA and protein levels and cytochrome P450 (CYP) 27a1, CYP7b1, CYP7a1 and CYP8b1 were detected by real-time quantitative polymerase chain reaction, Western blotting and immunohistochemistry, respectively. T test was used for statistical analysis. Results:The levels of plasma triacylglycerol, total cholesterol, total bilirubin, ALT and AST of Yinzhihuang oral liquid group were all lower than those of the high-fat diet group ((1.47±0.07) mmol/L vs. (1.90±0.13) mmol/L, (2.57±0.17) mmol/L vs. (6.84±0.23) mmol/L, (0.88±0.22) mg/dL vs. (2.06±0.25) mg/dL, (28.43±3.16) U/L vs. (87.15±23.27) U/L, (147.40±8.47) U/L vs. (289.00±12.66) U/L, respectively), and the differences were statistically significant ( t=3.90, 15.19, 4.31, 2.50 and 9.58, all P<0.05). The scores of adiposis and ballooning of hepatocytes of Yinzhihuang oral liquid group were lower than those of the high-fat diet group (1.00±0.26 vs. 2.33±0.33, 0.33±0.21 vs. 1.17±0.31, respectively), and the differences were all statistically significant ( t=3.90 and 4.90, both P<0.05). The levels of FXR antagonistic bile acids TβMCA and UDCA in ileal contents of Yinzhihuang oral liquid group were both higher than those of high-fat diet group ((4.95±0.68) nmol/g vs. (2.64±0.15) nmol/g, (7.86±1.84) nmol/g vs. (2.22±0.38) nmol/g, respectively), and the differences were statistically significant ( t=3.92 and 2.99, both P<0.05). The level of FXR agonistic bile acid cholic acid of Yinzhihuang oral liquid group were lower than that of the high-fat diet group ((4.69±0.46) nmol/g vs. (21.66±3.25) nmol/g), and the difference was statistically significant ( t=5.14, P<0.05). The expression of FXR, FGF15 in ileal tissues and FGFR4 in hepatic tissues at mRNA and protein levels of Yinzhihuang oral liquid group were all lower than those of the high-fat diet group (1.86±0.40 vs. 4.25±0.70, 9.99±2.82 vs. 75.17±23.41, 4.76±0.63 vs. 12.66±1.39, 2.20±0.14 vs. 5.30±0.25, 1.15±0.05 vs. 3.05±0.16 and 1.73±0.09 vs. 2.37±0.21, respectively), and the differences were statistically significant ( t=2.56, 2.76, 4.87, 10.90, 10.96 and 2.94, all P<0.05). The levels of CYP27a1 and CYP7b1 in the alternative pathway of bile acid synthesis in Yinzhihuang oral liquid group were both higher than those in the high-fat diet group (2.13±0.33 vs. 0.50±0.09 and 2.95±0.60 vs. 0.37±0.19), and the differences were statistically significant ( t=5.22 and 3.20, both P<0.05). But the expression level of CYP8b1 in the Yinzhihuang oral liquid group was lower than that in the high-fat diet group (2.38±0.41 vs. 8.63±2.20), and the difference was statistically significant ( t=2.80, P<0.05). Conclusion:Yinzhihuang oral liquid can reduce NAFLD by promoting bile acid synthesis through changing the components of intestinal bile acids in mice and inhibiting FXR-FGF15 signal pathway.

To improve the standard of quality control of tazobactam and its preparations in China, national reference standard of tazobactam impurity A was developed. After tazobactam impurity A was synthesized, its structure was validated by infrared (IR), mass spectrometry (MS) and nuclear magnetic resonance (NMR), and its content uniformity and short-term stability were measured and investigated. Then, water content and residue on ignition of impurity A were determined, and its purity was determined using high performance liquid chromatography (HPLC) with 10 mmol/L ammonium acetate solution-acetonitrile (98∶2) as the mobile phase. Mass balance method was used to determine the content of the first batch of tazobactam impurity A national standard substance. Meanwhile, nuclear magnetic quantitative method was used to calculate the content, which was mutually verified with the mass balance method. The developed reference material of tazobactam impurity A is consistent with the maximum degradation impurity in tazobactam system applicability solution and the reference material of tazobactam related substance A contained in USP41. Within the 95% confidence range, the ratio of inter- and intra-bottle variance of impurity A after separation was 0.61 (< F0.05(11,12)), proving that the uniformity was satisfying. The contents of organic impurity, water content and inorganic impurity in impurity A were 0.90%, 1.24% and 0.25%, respectively. The content of impurity A was determined to be 97.6% by mass balance method, which was basically consistent with the result of nuclear magnetic quantitative method (97.1%). Under the condition of 25 °C, the area normalized purity of impurity A was 99.1% at 0, 3, 5 and 10 days, proving that the sample was stable at room temperature for 10 days. Finally the first batch of national standard substance of tazobactam impurity A was established successfully.

Objective:To explore the classification and influencing factors of family resilience and post-traumatic growth in patients with spinal tumor.Methods:A cross-sectional investigation was conducted among 219 inpatients with spinal tumor admitted from July 2021 to July 2022. The General Demographic Information questionnaire, Chinese-Family Resilience Assessment Scale, Posttraumatic Growth Inventory, Family Crisis-Oriented Personal Evaluation Scales (F-COPES), and Social Support Rating Scale (SSRS) were used in the study. The ordinal and multivariate logistic regression analyses was applied to identify the factors associated with the classification of family resilience and post-traumatic growth.Results:Of the 219 patients, there were 62 cases of primary spinal tumors (28.3%). According to the results of latent profile analysis, the respondents were classified into three categories by family resilience and post-traumatic growth, namely family difficulty-resistant type ( n=38, 17.4%), general resilience-struggle type ( n=99, 45.2%) and family adaptation-growth type ( n=82, 37.4%). There were significant differences in occupational status, commitment to housework, family atmosphere( χ2=10.75, P=0.025; χ2=6.95, P=0.031; χ2=11.37, P=0.017), and total score of F-COPES and SSRS ( F=25.95, P<0.001; F=19.06, P<0.001)among three groups. Ordinal and multivariate logisitc regression analyses showed that retirement ( OR=2.928, 95% CI:1.098-7.808, P<0.05), family coping ( OR=1.113, 95% CI:1.063-1.165, P<0.05), and social support ( OR=1.226, 95% CI:1.103-1.362, P<0.05) were independently associated with family resilience and post-traumatic growth in patients with spinal tumor. Conclusion:Patients with spinal tumor have significant differences in characteristics by family resilience and post-traumatic growth. As a result, more targeted interventions should be provided for different categories of spinal tumor patients in the future.

Objective:To investigate the conversion of stromal vascular fraction (SVF) in the microenvironment of radiation-induced skin injuries to provide guidance for clinical applications.Methods:Based on a random number table, C57BL/6N mice were categorized into four groups: the blank control, negative control, acute injury, and chronic injury groups, with each group containing 25 mice. The backs of mice in the blank control, acute injury, and chronic injury groups were exposed to 15 Gy X-ray irradiation. Then, the mice in the negative control, acute injury, and chronic injury groups were injected subcutaneously with the SVF derived from B6/G-R mice. The survival of these mice was observed 1, 3, 7, 14, and 21 d after the injection through fluorescence tracing and in vivo imaging. Accordingly, the clinical SVF injection regimens were optimized based on the experimental result of mice. Finally, local SVF injection was performed on different frequencies for patients in different wound conditions, with the efficacy being observed. Results:The fluorescence of SVF was observed from the tissue slices of the acute injury, chronic injury, and negative control groups 14 d post-injection. The result showed that the fluorescence intensity of SVF 1, 3, and 7 d post-injection was in the order of the negative control group > the acute injury group > the chronic injury group. The acute injury group ranked at the top and the chronic injury group remained at the bottom 14 d after the injection. The fluorescence of SVF in each group was barely detected 21 d after the injection. Compared to the negative control group, the acute injury group exhibited statistical differences only 14 d post-injection ( t = 4.11, P < 0.05), while the chronic injury group displayed statistical differences 1, 3, 7, and 14 d after the injection ( t = 3.88-5.74, P < 0.05). Furthermore, the acute injury group exhibited significantly higher fluorescence intensity of SVF than the chronic injury group ( t = 4.73-8.38, P < 0.05). The half-life of SVF for the negative control, acute injury, and chronic injury groups was 6.336, 6.014, and 2.163 d, respectively. As indicated by the application of SVF transplantation based on traditional surgical protocols in the clinical trial, SVF can significantly promote wound repair, with earlier SVF transplantation being more beneficial for wound healing. Conclusions:The conversion of SVF differs in the microenvironments of acute and chronic radiation-induced skin injuries. This can serve as an essential guide for the administration timing and injection frequency of SVF in clinical applications.

OBJECTIVE: To investigate clinical interns' knowledge and attitude on pain management, influential factors and requirement.
 METHODS: A total of 212 clinical interns were investigated by the self-designed general condition questionnaire and the Chinese version of the knowledge and attitude survey regarding pain (KASRP).
 RESULTS: The correct answer rate for the knowledge and attitude questionnaire was (51.70±14.18)%. The education background, the condition of pain education in clinical practice and the use of pain assessment tools were the key factors that impact the scores of knowledge and attitude on pain management.
 CONCLUSION Clinical interns' perception on pain management is insufficient. It cannot meet the clinical actual needs. The medical colleges are lack of pain management education courses and standardization training. Schools and hospitals are encouraged to offer and strengthen pain education for clinical interns to create a good environment for pain treatment and to improve the management level for patients' quality of life.
Attitude of Health Personnel ; Health Knowledge, Attitudes, Practice ; Humans ; Internship and Residency ; Pain Management ; Quality of Life ; Surveys and Questionnaires

Purpose: Accumulating evidence has suggested that toll-like receptor 4 (TLR4) is critically involved in the pathogenesis of asthma. The aim of this study was to investigate the role of TLR4 in toluene diisocyanate (TDI)-induced allergic airway inflammation. Methods: TLR4−/− and wild-type (WT) C57BL/10J mice were sensitized and challenged with TDI to generate a TDI-induced asthma model. B-cell lymphoma 2 (Bcl-2) inhibitors, ABT-199 (4 mg/kg) and ABT-737 (4 mg/kg), were intranasally given to TDI-exposed TLR4−/− mice after each challenge. Results: TDI exposure led to increased airway hyperresponsiveness (AHR), granulocyte flux, bronchial epithelial shedding and extensive submucosal collagen deposition, which were unexpectedly aggravated by TLR4 deficiency. Following TDI challenge, TLR4−/− mice exhibited down-regulated interleukin-17A and increased colony-stimulating factor 3 in bronchoalveolar lavage fluid (BALF), while WT mice did not. In addition, TLR4 deficiency robustly suppressed the expression of NOD-like receptor family pyrin domain containing 3 and NLR family CARD domain containing 4, decreased caspase-1 activity in TDI-exposed mice, but had no effect on the level of high mobility group box 1 in BALF. Flow cytometry revealed that TDI hampered both neutrophil and eosinophil apoptosis, of which neutrophil apoptosis was further inhibited in TDI-exposed TLR4−/− mice, with marked up-regulation of Bcl-2. Moreover, inhibition of Bcl-2 with either ABT-199 or ABT-737 significantly alleviated neutrophil recruitment by promoting apoptosis. Conclusions These data indicated that TLR4 deficiency promoted neutrophil infiltration by impairing its apoptosis via up-regulation of Bcl-2, thereby resulting in deteriorated AHR and airway inflammation, which suggests that TLR4 could be a negative regulator of TDI-induced neutrophilic inflammation.