Objective The monoclone antibody against insulin was prepared and used to measure plasma level of insulin in patients with type 2 diabetes mellitus. Methods Balb/c mice were immunedwith cross-linking insulin-BSA as immunogen. Four monoelone cell strains stably secreting insulin monoclone antibody were prepared by applying hybridoma technique. The valence, subclass and affini-ty constant of the monoclone antibody were analyzed. The serum insulin content was measured with competitive inhibition ELISA in 90 patients with type 2 diabetes mellitus and 90 healthy controls. Re-suits The affinity constant of the established monoclone antibody reached to 1011. The subclass of 1 strain was Igab(k),and the other 3 strains were Ig1(k) srbclass.The mean level of insulin was significantly lower in patients with type 2 diabetes mellitus than that of healthy controls. Conclusion These results implicated that the insulin insufficient might be due to the depletion of the pancreatic be-ta cell function of patients with type 2 diabetes mellitus, and the pathogenetic condition might be alle-viated by supplying insulin. About 10% patients are with higher insulin level than healthy controls,which may be due to insulin resistance. It is inadvisable to treat these patients with insulin therapy.

Objective To study corrective method for displacement in the procedure of electronic portal imaging device (EPID)-based intensity-modulated radiotherapy dose valuation by studying the relative mechanical displacement of different vendor EPID (aS1000,Varian; aS500,Varian; iViewGT,Elekta).Methods A 5 cm × 5 cm field was set up to acquire portal images for three kinds of EPID,then a in house software was used to analysis the portal images.The relative displacement was acquired via analyzing a series of comparation between center positions of gantry angle ranging from 0° to 360° and gantry angle at 0°.Results In the lateral direction,the maximum relative displacement of EPID with aS1000,S500 and iViewGT were (-0.23 ±0.17) mm,(2.94±0.17) mm and (0.35 ±0.09) mm,respectively.In the longitude direction,the displacements were (-4.16 ± 0.20) mm,(-4.15 ± 0.25) mm and (-1.66 ±0.11) mm,respectively.As to longitude direction,the displacements could be well fitted with the usage of quadruplicate empiric function.Conclusions There is a significant difference at the aspect of relative displacement between different vendors EPID at different gantry angles.And the displacement in the longitude direction is obviously larger than in the lateral direction.The relative displacement should be corrected when applying EPID to the intensity-modulated radiotherapy dose verification at different gantry angles.

Objective To evaluate the precision and accuracy of blood glucose meter(BGM ) for community home use testing . Methods According to the In Vitro Diagnostic Test Systems‐Requirements for Blood Glucose Monitoring Systems for Self‐Testing in Managing Diabetes Mellitus in DIN EN ISO15197 :2013 .Capillary blood and venous blood were tested by BGM and the laborato‐ry biochemical analyzer respectively .The measurement results of each BGM were compared with the results of the biochemical ana‐lyzer for conducting the bias analysis .Results In evaluated 20 BGM ,none of them met the requirements of ISO15197 :2013(when blood glucose concentrations < 5 .5 mmol/L ,the bias in 95% of detection results is within the range of ± 0 .83 mmol/L ;when blood glucose concentrations ≥ 5 .5 mmol/L ,the bias in 95% of detection results is within the range of ± 15% .Only 11 imported BGM (55% ) met the state standard .Conclusion The bias of 20 BGM ranged - 28 .7% - 3 .8% ,with the average bias of - 12 .2% . These detection results will bring the large risk of therapy in the diabetic patients .The regular and standardized evaluation of BGM performance may ensure the quality of blood glucose self - monitoring .

We have developed a rapid and high throughput lipase-ANS (8-Anilino-l-naphthalenesulfonic acid) assay to evaluate the thermo-stability of lipases based on the ANS fluorescence signal's increasing and shifting when this small fluorescence probes binds to lipase. The testing lipase samples were incubated at a temperature range of 25 degrees C to 65 degrees C for 30 min before mixed with ANS solution (0.20 mg/mL lipase and 0.05 mmol/L ANS in the buffer of 20 mmol/L Tris-HCl, 100 mmol/L NaCl, pH 7.2) in a cuvette or microplate. Fluorescence signals of the samples were measured at EX 378 nm, EM 465 nm with a fluorescence photometer or a plate reader, and Tm was calculated with the software of GraphPad Prism5.0. The Tm values of several mutants of Penicillium expansum lipase (PEL) were measured with this ANS assay and conventional method simultaneously and the results show that Tm values are comparative and consistent between these methods, suggesting that the lipase-ANS assay is a reliable, rapid and high throughput method for lipase thermo-stability measurement.
Anilino Naphthalenesulfonates ; chemistry ; Enzyme Stability ; High-Throughput Screening Assays ; methods ; Hot Temperature ; Lipase ; metabolism ; Spectrometry, Fluorescence

Objective: To explore the influence of different inner dressings in negative-pressure wound therapy (NPWT) on escharectomy wound of full-thickness burn rabbits. Methods: Eighteen Japanese white rabbits were inflicted with full-thickness burn on unilateral back. They were divided into polymer dressing group (PD), biological dressing group (BD), and silver biological dressing group (SBD), according to the random number table, with 6 rabbits in each group. On 3 days post burn, the wounds were performed with escharectomy, and then wounds of rabbits in group PD were covered with polyurethane foam. Wounds of rabbits in group BD were covered with porcine acellular dermal matrix (ADM) and wounds of rabbits in group SBD were covered with silver porcine ADM. Then continuous NPWT was performed on rabbits of the three groups for 7 days. Immediately after surgery and on post surgery day (PSD) 7, general observation of wound was conducted and tissue around the wound was harvested for determination of dry to wet weight ratio. The content of bacteria was counted and the content of tumor necrosis factor α (TNF-α), interleukin-1β (IL-1β), and IL-6 in wound was determined by enzyme-linked immunosorbent assay. Fibroblasts in wound were counted after Masson staining and number of microvessels was counted after CD31 antibody immunohistochemical staining. Data were processed with analysis of variance for repeated measurement, LSD-t test, paired samples t test, and Bonferroni correction. Results: (1) Immediately after surgery, there was no granulation tissue in basal wound of rabbits in the three groups, with rich blood supply and obvious edema. On PSD 7, much granulation tissue was found in basal wound of rabbits in the three groups, with no or mild edema and no obvious redness and swelling in wound edge. (2) There were no significant differences in dry to wet weight ratios of tissue around the wound among and within the three groups immediately after surgery and on PSD 7 (with F values respectively 0.70 and 0.09, t values from 0.17 to 0.52, P values above 0.05). (3) Immediately after surgery, the content of bacteria in wounds of rabbits in groups PD, BD, and SBD was respectively (603.0±146.0) ×10^4, (573.0±63.0) ×10^4, and (590.0±100.0)×10⁴ colony-forming unit (CFU)/g, with no significant difference among them (F=0.13, P>0.05). On PSD 7, the content of bacteria in wounds of rabbits in groups PD, BD, and SBD were respectively (5.4±0.8) ×10^4, (4.6±0.9) ×10^4, and (3.5±0.9)×10⁴ CFU/g. Among them, the content of bacteria in wounds of rabbits in group SBD was lower than that in groups PD and BD, respectively (with t values respectively 3.78 and 2.29, P<0.05 or P<0.01). The content of bacteria in wounds of rabbits in the three groups on PSD 7 was decreased compared with that immediately after surgery (with t values from 10.05 to 21.81, P values below 0.01). (4) There was no significant difference in content of TNF-α, IL-1β, and IL-6 in wounds of rabbits in the three groups immediately after surgery and on PSD 7 (with F values from 0.10 to 1.89, P values above 0.05). The content of TNF-α in wounds of rabbits in the three groups on PSD 7 was significantly higher than that immediately after surgery (with t values from 2.93 to 5.01, P<0.05 or P<0.01). (5) There was no significant difference in amount of fibroblasts in wounds of rabbits in the three groups immediately after surgery and on PSD 7 (with F values respectively 0.01 and 0.81, P values above 0.05). The amount of fibroblasts in wounds of rabbits in the three groups on PSD 7 was larger than that immediately after surgery (with t values from 4.78 to 11.58, P values below 0.01). (6) There was no significant difference in number of microvessels in wounds of rabbits in the three groups immediately after surgery and on PSD 7 (with F values respectively 2.42 and 2.49, P values above 0.05). The number of microvessels in wounds of rabbits in the three groups on PSD 7 was larger than that immediately after surgery (with t values from 7.17 to 11.14, P values below 0.01). Conclusions SBD is better at inhibiting the growth of bacteria. PD, BD, and SBD have almost the same effects on reducing tissue edema and inflammatory reaction, and on promoting the accumulation of collagen fibers and tissue vascularization.

The competitive sports are beneficial to cardiovascular system and brain health. However, physical exercise is accompanied with risks. Severe trauma is possible in competitive sports that may impact on the head and body. In recent years, more interests are aroused in sports-related traumatic brain injury(TBI), especially the mild TBI(mTBI). Repetitive mTBI can cause persistent cognitive, behavioral and mental problems, leading to chronic traumatic encephalopathy(CTE) and eventually resulting in neurodegeneration. In this study, the authors summarize the pathological characteristics and mechanism of CTE induced by mTBI due to competitive exercise so as to reveal the pathogenesis of CTE and provide valuable information for early diagnosis, development of disease biomarkers and explore effective therapeutic targets.

Objective:To study the prevalence of body dysmorphic disorder (BDD) in patients with plastic and cosmetic by performing meta-analysis.Methods:We searched, collected and screened the published studies on the prevalence of BDD in population with cosmetic surgery at home and abroad, and conducted a meta-analysis to calculate the prevalence of BDD in this population. The literatures were screened strictly according to the inclusion and exclusion criteria, and the quality of the included studies was evaluated with reference to AHRQ scale. Cochrane Q test was used to analyze the heterogeneity among the studies. If there was no heterogeneity, the fixed effect model was used for the pooled analysis of effect size. If there was heterogeneity, the random effect model was used for the pooled analysis of effect size, and the potential sources of heterogeneity were tested by meta regression, and subgroup analysis was performed. Sensitivity analysis was performed to test the stability of the result. Funnel plot was used to determine whether publication bias existed.Results:Thirteen articles were finally included in the meta-analysis, including 4 Chinese articles and 9 English articles, with a total sample size of 3 366 cases. A total of 435 cases of BDD were detected. The AHRQ scores of the 13 articles were greater or equal to 4 points. Heterogeneity test showed that there was a high degree of heterogeneity among the 13 studies, so the random effect model was used for pooled analysis of effect size. The results showed that the prevalence rate of BDD in population with plastic surgery was 13% (95% CI 9% - 18%). Sensitivity analysis shows that the result calculated by the random effect model are stable and reliable. Meta regression analysis showed that the difference of surgical site was one of the reasons for heterogeneity. Thirteen articles were divided into two groups according to patients with rhinoplasty and plastic surgery in other parts, and meta-analysis was conducted respectively. There were 3 articles in rhinoplasty group and 10 articles in other part of the plastic surgery. The result showed that the prevalence of BDD was 29% (95% CI 24% - 35%) in rhinoplasty group and 9% (95% CI 8% -10%) group with plastic surgery in other parts. Funnel plot analysis showed that there was no publication bias in this study. Conclusions:About 9% of the people with cosmetic surgery suffer from BDD, and the prevalence of BDD in the people seeking nasal plastic surgery can be as high as 29%. Plastic surgeons should pay special attention to this kind of people in clinical work, and use appropriate screening tools to identify them, so as to provide more scientific diagnosis and treatment plan for patients. Aesthetic plastic surgeons should pay attention to the evaluation of patients’ psychological state in clinical work.

Physical exercise can accompany with risks, such as repeated blows to the head, causing mild traumatic brain injury (mTBI), and mTBI will cause continuous cognitive, behavioral and mental problems, bring neurodegeneration and ultimately lead to chronic traumatic encephalopathy (CTE). However, this regular exercise can also be used as a neuroprotective agent against cognitive decline in the brain and affect the plasticity of the brain. Regular exercise can improve the brain learning, memory, recognition and the disease process of CTE by reducing abnormal protein accumulation, promoting neurogenesis, synapse formation, increasing synaptic plasticity and angiogenesis, improving microcirculation, anti-microinflammation and oxidative stress, and promoting mental health. This review analyzes the pathological changes and mechanism of CTE and explore the mechanism of regular exercise in improving neurological function after CTE, so as to provide new ideas for CTE rehabilitation.

Objective:To study the prevalence of body dysmorphic disorder (BDD) in patients with plastic and cosmetic by performing meta-analysis.Methods:We searched, collected and screened the published studies on the prevalence of BDD in population with cosmetic surgery at home and abroad, and conducted a meta-analysis to calculate the prevalence of BDD in this population. The literatures were screened strictly according to the inclusion and exclusion criteria, and the quality of the included studies was evaluated with reference to AHRQ scale. Cochrane Q test was used to analyze the heterogeneity among the studies. If there was no heterogeneity, the fixed effect model was used for the pooled analysis of effect size. If there was heterogeneity, the random effect model was used for the pooled analysis of effect size, and the potential sources of heterogeneity were tested by meta regression, and subgroup analysis was performed. Sensitivity analysis was performed to test the stability of the result. Funnel plot was used to determine whether publication bias existed.Results:Thirteen articles were finally included in the meta-analysis, including 4 Chinese articles and 9 English articles, with a total sample size of 3 366 cases. A total of 435 cases of BDD were detected. The AHRQ scores of the 13 articles were greater or equal to 4 points. Heterogeneity test showed that there was a high degree of heterogeneity among the 13 studies, so the random effect model was used for pooled analysis of effect size. The results showed that the prevalence rate of BDD in population with plastic surgery was 13% (95% CI 9% - 18%). Sensitivity analysis shows that the result calculated by the random effect model are stable and reliable. Meta regression analysis showed that the difference of surgical site was one of the reasons for heterogeneity. Thirteen articles were divided into two groups according to patients with rhinoplasty and plastic surgery in other parts, and meta-analysis was conducted respectively. There were 3 articles in rhinoplasty group and 10 articles in other part of the plastic surgery. The result showed that the prevalence of BDD was 29% (95% CI 24% - 35%) in rhinoplasty group and 9% (95% CI 8% -10%) group with plastic surgery in other parts. Funnel plot analysis showed that there was no publication bias in this study. Conclusions:About 9% of the people with cosmetic surgery suffer from BDD, and the prevalence of BDD in the people seeking nasal plastic surgery can be as high as 29%. Plastic surgeons should pay special attention to this kind of people in clinical work, and use appropriate screening tools to identify them, so as to provide more scientific diagnosis and treatment plan for patients. Aesthetic plastic surgeons should pay attention to the evaluation of patients’ psychological state in clinical work.

Objective:To explore the relationship between death indicators and unplanned return indicators on healthcare quality evaluation.Methods:A total of 836 976 medical record data were collected from 31 tertiary public general hospitals in a diagnosis-related groups(DRG) data platform in 2017. Multiple death indices(low and low-risk risk group mortality, high-risk group mortality, crude mortality, and risk adjusted mortality) and unplanned return indices(31-day unplanned readmission rate and 31-day unplanned return to surgery rate) were calculated. Pearson′s correlation coefficient was used to examine the relationships among those indices.Results:Death indicators were correlated with each other, but the unplanned readmission rate was not correlated with the unplanned reoperation rate( r=0.305). There was no correlation between unplanned re-entry rate and death rate. The correlation coefficients were as follows: unplanned readmission rate versus low and low-risk group mortality( r=-0.227), versus high-risk group mortality( r=-0.098), versus actual mortality( r=-0.130), versus risk adjusted mortality( r=0.010); unplanned reoperation rate versus low and low-risk group mortality( r=0.105), versus high-risk group mortality( r=0.030), versus actual mortality( r=-0.004), versus risk adjusted mortality( r=-0.141). Conclusions:The indicators of death and the indicators of unplanned return are not the same in terms of actual management technology and evaluation effect. They are complementary to each other and can form an ideal combination of quality evaluation indicators.