1.Role of Dectin-1 in the production of IL-10 and TNF-α by rat tracheal epithelial cells stimulated with heat-treated Candida glabrata
Ying ZHAO ; Xueping LUO ; Xue ZHANG ; Wenming SONG
Chinese Journal of Infection Control 2017;16(1):10-15
Objective To investigate the effect of Dectin-1 on the release of inflammatory factors interleukin-10 (IL-10) and tumor necrosis factor-α (TNF-α) in rat tracheal epithelial cells (RTECs) stimulated with heat-treated Candida glabrata (C.glabrata).Methods RTECs cultivated in vitro were randomly divided into three groups,including control group(RTECs + sterile normal saline),fungal stimulation group(RTECs + heat-treated C.glabrata),and inhibitor intervention group(RTECs + laminarin + heat-treated C.glabrata),cells were harvested after incubation for 0,2,4,6 hours respectively,cell survival rate was determined by MTT method,expression of Dectin-1 was analyzed by Western Blot,expression of IL-10 and TNF-α were detected by enzyme-linked immunosorbent assay (ELISA).Results Heat-treated C.glabrata destroyed cell structure and reduced cell survival rate.At the beginning of the culture (0 h),cell survival rate,expressions of Dectin-1,IL-10 and TNF-α among three groups were all not significantly different(all P>0.05).After incubation for 2,4,6 hours,expressions of Dectin-1,IL-10 and TNF-α in fungal stimulation group and inhibitor intervention group were both significantly higher than control group;expressions of Dectin-1,IL-10,and TNF-α in inhibitor intervention group was lower than fungal stimulation group(all P<0.05).The expressions of IL-10 in inhibitor intervention group at 0 h and 2 h was not significantly different,expressions of Dectin-1,IL-10,and TNF-α in fungal stimulation group and inhibitor intervention group at different incubation periods were significantly different(all P<0.05).Conclusion Dectin-1 is an important receptor for RTECs to recognize the heat-treated C.glabrata,it induces the release of IL-10 and TNF-α,and mediate the occurrence of inflammation.
2.Determination of Ferric Oxide in Calamine Powder by FAAS
Dongmei SONG ; Yang CHEN ; Wenming JIANG ; Yongjian YANG
China Pharmacist 2016;19(4):806-807
Objective:To determine the content of ferric oxide in calamine powder. Methods:Flame atomic absorption spectrom-etry ( FAAS) was used to determine the content of ferric oxide. The determination results were compared with those of the titration method. Results:There was a good linear relationship between the absorbance and the concentration of iron within the range of 0. 5-4μg·ml-1 , the relative standard deviation of the repeatability test was 1. 2%, the average recoveries were 100. 4% and 99. 4%, the limit of quantitation and detection was 0. 081 μg·ml-1 and 0. 024 μg·ml-1 , respectively. Conclusion:The method of FAAS is ac-curate and quick with good specificity and high sensitivity, which can be used for the determination of ferric oxide in calamine powder.
3.Risk factors of mortality in Klebsiella pneumoniae bloodstream infection and construction of a prediction model for prognosis of patients
Xiaojie YU ; Wenming YANG ; Pingping SONG ; Ying WEI ; Na WANG
Chinese Journal of Clinical Infectious Diseases 2023;16(2):128-133
Objective:To explore the risk factors of mortality in patients with Klebsiella pneumoniae bloodstream infection, and to construct a predictive model. Methods:The clinical data of 234 patients with Klebsiella pneumoniae bloodstream infection admitted in the First Hospital of Qinhuangdao from January 2020 to December 2022 were retrospectively analyzed, including 202 cases admitted during January 2020 to June 2022 (model set), and 32 cases admitted during July to December 2022 (validation set). There were 64 cases died (fatal group) and 138 cases survived (survival group) within 28 d after admission in model set. Multivariate Logistic regression was used to analyze the risk factors of death in patients with Klebsiella pneumoniae bloodstream infection and a mortality prediction model was constructed. The constructed model was applied in validation set, and the consistency between predicted mortality and real mortality was analyzed. Results:Multivariate Logistic regression analysis showed that male sex ( OR=2.598, 95% CI 1.179-5.725, P=0.018), age≥65 years ( OR=4.420, 95% CI 2.029-9.627, P<0.001), admitted to intensive care unit (ICU) ( OR=10.299, 95% CI 4.752-22.321, P<0.001), and the empirical use of quinolones antibiotics ( OR=4.288, 95% CI 1.127-16.317, P=0.033) were independent risk factors for 28-day mortality in Klebsiella pneumoniae bloodstream infection patients. The regression equation for predicting the risk of death was -3.469+ male × 0.955+ age ≥ 65 years × 1.486+ admitted to ICU × 2.332+ empirical use of quinolone antibiotics × 1.456. The area under the ROC curve (AUC) for predicting death in the model set was 0.831, with sensitivity and specificity of 71.9% and 80.4%, respectively. The AUC for predicting death in the validation set was 0.881, with sensitivity and specificity of 91.7% and 75.0%, respectively. Conclusion:The constructed mortality prediction model in the study has good application value for the prognosis of patients with Klebsiella pneumoniae bloodstream infection.
4.Clinical study on thermal moxibustion combined with Duhuo Jisheng Decoction for the patients with knee osteoarthritis and liver and kidney deficiency syndrome
Qingjun SU ; Peng LI ; Chaohui BIAN ; Guangming SONG ; Wenming MA
International Journal of Traditional Chinese Medicine 2022;44(6):636-640
Objective:To explore the clinical efficacy of thermal moxibustion combined with Duhuo Jisheng Decoction in the treatment of liver and kidney deficiency syndrome of knee osteoarthritis (KOA).Methods:From January 2020 to January 2021, 124 KOA patients with liver and kidney deficiency syndrome, who met the inclusion criteria, were divided into 2 groups according to the random number table method, with 62 in each group. The control group was treated with Duhuo Jisheng Decoction, and the observation group was treated with thermal moxibustion on the basis of the control group. Both groups were treated for 28 days. TCM symptom scores were performed before and after treatment, the Osteoarthritis Index of Western Ontario and McMaster University (WOMAC) was used to evaluate joint function. ELISA was used to detect serum insulin-like growth factor-1 (IGF-1), fibroblast growth factor-2 (FGF-2), transforming growth factor-β1 (TGF-β1), IL-1β, IL-6, TNF-α levels, and the clinical efficacy was evaluated.Results:The total effective rate was 91.9% (57/62) in the observation group and 77.4% (48/62) in the control group, and there was significant difference between two groups ( χ2=5.04, P=0.025). After treatment, the TCM symptom score and WOMAC score of the observation group were significantly lower than those of the control group ( t values were 11.33 and 12.23, respectively, all Ps<0.01). After treatment, the serum levels of IGF-1 [(15.63±2.03) ng/L vs. (12.78±1.57) ng/L, t=8.75], FGF-2 [(30.26±5.37) ng/L vs. (26.31±1.94) ng/L, t=5.45] and TGF-β1[(30.39±6.71)μg/L vs. (24.31±5.12) μg/L, t=5.67] in the observation group were significantly higher than those in the control group ( P<0.01), while the levels of IL-1β [(12.50±3.36) ng/L vs. (16.09±4.90) ng/L, t=4.76], IL-6 [(10.59±3.28) ng/L vs. (21.75 ± 4.09) ng/L, t=16.76] and TNF-α [(4.04±1.92) ng/L vs. (6.48±1.43) ng/L, t=8.03] in the observation group were significantly lower than those in the control group ( P<0.01). There was no adverse events from both groups during treatment. Conclusion:Thermal moxibustion combined with Duhuo Jisheng Ddecoction can alleviate the joint pain of KOA patients with liver and kidney deficiency syndrome, promote cartilage repair and improve the clinical curative effect.
5.Construction of a risk prediction model for bloodstream infection induced by carbapenem-resistant Klebsiella pneumoniae
Xiaojie YU ; Wenming YANG ; Pingping SONG ; Ying WEI ; Na WANG
China Pharmacy 2024;35(1):75-79
OBJECTIVE To construct a risk prediction model for bloodstream infection (BSI) induced by carbapenem-resistant Klebsiella pneumoniae (CRKP). METHODS Retrospective analysis was conducted for clinical data from 253 patients with BSI induced by K. pneumoniae in the First Hospital of Qinhuangdao from January 2019 to June 2022. Patients admitted from January 2019 to December 2021 were selected as the model group (n=223), and patients admitted from January 2022 to June 2022 were selected as the validation group (n=30). The model group was divided into the CRKP subgroup (n=56) and the carbapenem- sensitive K. pneumoniae (CSKP) subgroup (n=167) based on whether CRKP was detected or not. The univariate and multivariate Logistic analyses were performed on basic information such as gender, age and comorbid underlying diseases in two subgroups of patients; independent risk factors were screened for CRKP-induced BSI, and a risk prediction model was constructed. The established model was verified with patients in the validation group as the target. RESULTS Admissioning to intensive care unit (ICU), use of immunosuppressants, empirical use of carbapenems and empirical use of antibiotics against Gram-positive coccus were independent risk factors of CRKP-induced BSI (ORs were 3.749, 3.074, 2.909, 9.419, 95%CIs were 1.639-8.572, 1.292- 7.312, 1.180-7.717, 2.877-30.840, P<0.05). Based on this, a risk prediction model was established with a P value of 0.365. The AUC of the receiver operating characteristic (ROC) curve of the model was 0.848 [95%CI (0.779, 0.916), P<0.001], and the critical score was 6.5. In the validation group, the overall accuracy of the prediction under the model was 86.67%, and the AUC of ROC curve was 0.926 [95%CI (0.809, 1.000], P<0.001]. CONCLUSIONS Admission to ICU, use of immunosuppressants, empirical use of carbapenems and empirical use of antibiotics against Gram-positive coccus are independent risk factors of CRKP- induced BSI. The CRKP-induced BSI risk prediction model based on the above factors has good prediction accuracy.
6.Structural Design and Verification of a Novel Electric Stapler for Minimally Invasive Surgery
Chenxu LIU ; Chengli SONG ; Yu ZHOU ; Lin MAO ; Wenming GE ; Peiyao WANG ; Li CHEN
Journal of Medical Biomechanics 2019;34(6):E631-E636
Objective To develop a novel electric stapler, so as to improve the automation, convenience and precision of minimally invasive surgery. Methods The clamping, firing and turning mechanism of the new electric stapler was innovatively designed to realize the electric drive of minimally invasive surgical anastomosis on the basis of traditional mechanical stapler. The motion process of electric clamping, firing and double-screw turning mechanism was analyzed in detail, and the equations for motion function of three mechanisms were solved, providing a theoretical basis for the intelligent control algorithm of electric stapler. Results The electric clamping and firing process was simulated using ADAMS software to verify the equation of motion. The prototype of the new electric stapler was made, and the anastomosis experiment and blasting pressure experiment of the in vitro small intestine tissues were carried out. The range of anastomotic blasting pressure was between 3.7 kPa and 11.67 kPa, meeting the basic requirements in clinic. Conclusions The structure of the new electric stapler can meet the requirements of electric pressing and firing in minimally invasive surgery, contributing to achieve tissue anastomosis more conveniently, quickly and effectively.
7.Design Optimization, Function Analysis and in vitro Experiments of an Electric Stapler for Minimally Invasive Surgery
Wenming GE ; Peiyao WANG ; Chenxu LIU ; Yuxiu LING ; Zhen PAN ; Zhongxin HU ; Yu ZHOU ; Chengli SONG
Journal of Medical Biomechanics 2020;35(5):E574-E580
Objective To develop a new type of electric stapler, so as to solve the problems of insufficient rotation angle, inconvenient operation and difficulty in controlling the pressing strength of existing products. Methods An electric stapler was designed and manufactured. The motion trajectory curve of the prototype was measured by using the three-coordinate imaging instrument to build functional test platform of the prototype, and the goodness of fit was used to evaluate consistency between the theoretical curve and the measured curve. The small intestine tissues of fresh pig were anastomosed at different bending angles of the front end, and the forming rate of the anastomotic stoma was measured. Results The goodness of fit between the test curve and the theoretical curve for both turning motion and shooting motion was ideal, while the goodness of fit between the test curve and the theoretical curve for pressing motion was not ideal when the turning joint was bent at 0°-30°, and was ideal when it was bent at 45°-60°. In performance test, the deformity rate of the nail was smaller than 1.14%, indicating that the bending angle had no significant impacts on the anastomotic effect. Conclusions The kinematics curves of shooting motion and turning motion are consistent with the theoretical curves. The pressing motion curves fluctuate at different bending angles, which will not affect the anastomotic effect, and the effect of the electric stapler meets the clinical requirements.
8.Expert consensus on rehabilitation strategies for traumatic spinal cord injury
Liehu CAO ; Feng NIU ; Wencai ZHANG ; Qiang YANG ; Shijie CHEN ; Guoqing YANG ; Boyu WANG ; Yanxi CHEN ; Guohui LIU ; Dongliang WANG ; Ximing LIU ; Xiaoling TONG ; Guodong LIU ; Hongjian LIU ; Tao LUO ; Zhongmin SHI ; Biaotong HUANG ; Wenming CHEN ; Qining WANG ; Shaojun SONG ; Lili YANG ; Tongsheng LIU ; Dawei HE ; Zhenghong YU ; Jianzheng ZHANG ; Zhiyong HOU ; Zengwu SHAO ; Dianying ZHANG ; Haodong LIN ; Baoqing YU ; Yunfeng CHEN ; Xiaodong ZHU ; Qinglin HANG ; Zhengrong GU ; Xiao CHEN ; Yan HU ; Liming XIONG ; Yunfei ZHANG ; Yong WANG ; Lei ZHANG ; Lei YANG ; Peijian TONG ; Jinpeng JIA ; Peng ZHANG ; Yong ZHANG ; Kuo SUN ; Tao SHEN ; Shiwu DONG ; Jianfei WANG ; Hongliang WANG ; Yong FENG ; Zhimin YING ; Chengdong HU ; Ming LI ; Xiaotao CHEN ; Weiguo YANG ; Xing WU ; Jiaqian ZHOU ; Haidong XU ; Bobin MI ; Yingze ZHANG ; Jiacan SU
Chinese Journal of Trauma 2020;36(5):385-392
TSCI have dyskinesia and sensory disturbance that can cause various life-threaten complications. The patients with traumatic spinal cord injury (TSCI), seriously affecting the quality of life of patients. Based on the epidemiology of TSCI and domestic and foreign literatures as well as expert investigations, this expert consensus reviews the definition, injury classification, rehabilitation assessment, rehabilitation strategies and rehabilitation measures of TSCI so as to provide early standardized rehabilitation treatment methods for TSCI.
9.Design and Experimental Study on Flexible Articulation of Electric Stapler
Zhen PAN ; Liaoyuan AI ; Haochen WANG ; Chenxu LIU ; Wenming GE ; Chengli SONG
Journal of Medical Biomechanics 2021;36(6):E883-E889
Objective To design a notched flexible articulation applied to electric stapler and study its turning performance. Methods The notched flexible articulation was designed and modeled. The kinematics and statics models of the articulation were established for simulation calculations. The stress, deflection angle, top displacement and driving force of the articulation with 3 different turning structures were studied under equal and variable stiffness of symmetrical notches by using finite element simulation. An experimental platform for performance test of the turning structure was built to verify the simulation results and the model. Results The theoretical model of the turning structure in bending process was basically consistent with the experimental results. With the optimization of symmetrical notch stiffness, the maximum stress of the articulation with variable stiffness was reduced by 20.64% and 39.20%, respectively. The articulation with variable stiffness required the smallest tensile force during bending, which was 33.41% lower than that of the articulation with equal stiffness, and the tip displacement (30.8 mm) along the bending plane was the smallest. The maximum deflection angle for the articulation with 3 different turning structures all could reach 90°. Conclusions The kinematics and statics models of the articulation can be used for the calculation of its tensile force and position changes. The turning performance of the articulation with variable stiffness using symmetrical notch is better than that with equal stiffness. The notched flexible articulation meets the design requirements and the turning needs of electric stapler.
10.Efficacy evaluation of transaxillary non-inflatable endoscopic surgery and open neck surgery in the treatment of PTC: a single center report of 342 cases.
Wenhua SONG ; Dongmin WEI ; Wenming LI ; Ye QIAN ; Dongyan CHEN ; Chenyang XU ; Zhouyi ZHANG ; Xinliang PAN ; Dapeng LEI
Journal of Clinical Otorhinolaryngology Head and Neck Surgery 2023;37(9):695-707
Objective:To compare the clinical effect of transaxillary non-inflatable endoscopic surgery and traditional open thyroid surgery in the treatment of PTC. Methods:A retrospective analysis was performed on 342 patients with PTC treated in the Otorhinolaryngology Department of Qilu Hospital of Shandong University from December 2020 to December 2022. There were 73 males and 269 females, aged 16-72 years, who underwent unilateral non-inflatable transaxillary endoscopic thyroid surgery(endoscopic group) and unilateral traditional open thyroid surgery(open group). There were 108 patients in the endoscopic group and 234 in the open group. Results:The endoscopic group was lower in age(37.1±9.4 vs 43.5±11.2) years and BMI(23.4±3.4 vs 25.7±3.8 )kg/m² than that in the open group, and the difference was statistically significant(t was 5.53, 5.67 respectively, P<0.01). There was no significant difference in hospitalization days between the two groups(P>0.05). The logarithmic curve of the operation time showed a smooth downward trend, and the overall operation time of the endoscopic group was relatively consistent. There was no significant difference in intraoperative blood loss between the endoscopic group(13.3±3.2) mL and the open group(14.7±6.3) mL(P>0.05), but the operation time(130.1±37.9) min was longer than that in the open group(57.4±13.7) min, and the difference was statistically significant(t=19.40, P<0.01). There was no significant difference in complications such as temporary recurrent laryngeal nerve injury within 3 days after operation between the two groups(P>0.05). The aesthetic satisfaction score of the surgical incision and the incision concealment effect score in the endoscopic group were higher than those in the open group, and the difference was statistically significant(P<0.05). Conclusion:Compared with traditional open thyroidectomy, transaxillary non-inflatable endoscopic thyroidectomy has more advantages in the concealment and aesthetics of postoperative incision. Although the former has longer operation time and more drainage, it is still a safe and feasible surgical method with good postoperative clinical effect.
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