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Wang GC, Liu YJ, Cheng Y, Wang YC, Liu XY, Han GS. [Prevention of high-risk complications for high esophagojejunal anastomosis leakage after total gastrectomy]. ZHONGHUA ZHONG LIU ZA ZHI [CHINESE JOURNAL OF ONCOLOGY] 2017; 39:792-794. [PMID: 29061026 DOI: 10.3760/cma.j.issn.0253-3766.2017.10.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Xiao MY, Wang ZY, Fan HM, Che CL, Lu Y, Cong LX, Gao XJ, Liu YJ, Yuan JX, Li XM, Hu B, Chen YP. [Relationship between shift work and overweight/obesity in male steel workers]. ZHONGHUA LIU XING BING XUE ZA ZHI = ZHONGHUA LIUXINGBINGXUE ZAZHI 2017; 37:1468-1472. [PMID: 28057136 DOI: 10.3760/cma.j.issn.0254-6450.2016.11.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the relationship between shift work and overweight/obesity in male steel workers. Methods: A questionnaire survey was conducted among the male steel workers selected during health examination in Tangshan Steel Company from March 2015 to March 2016. The relationship between shift work and overweight/obesity in the male steel workers were analyzed by using logistic regression model and restricted cubic splinemodel. Results: A total of 7 262 male steel workers were surveyed, the overall prevalence of overweight/obesitywas 64.5% (4 686/7 262), the overweight rate was 34.3% and the obesity rate was 30.2%, respectively. After adjusting for age, educational level and average family income level per month by multivariable logistic regression analysis, shift work was associated with overweight/obesity and obesity in the male steel workers. The OR was 1.19(95% CI: 1.05-1.35) and 1.15(95% CI: 1.00-1.32). Restricted cubic spline model analysis showed that the relationship between shift work years and overweight/obesity in the male steel workers was a nonlinear dose response one (nonlinear test χ2=7.43, P<0.05). Restricted cubic spline model analysis showed that the relationship between shift work years and obesity in the male steel workers was a nonlinear dose response one (nonlinear test χ2=10.48, P<0.05). Conclusion: Shift work was associated with overweight and obesity in the male steel workers, and shift work years and overweight/obesity had a nonlinear relationship.
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Wan YK, Sang W, Chen B, Yang YG, Zhang LQ, Sun AN, Liu YJ, Xu Y, Cai YP, Wang CB, Shen YF, Jiang YW, Zhang XY, Xu W, Hong M, Chen T, Xu RR, Li F, Xu YL, Xue Y, Lu YL, He ZM, Dong WM, Chen Z, Ji MH, Yang YY, Zhai LJ, Zhao Y, Wu GQ, Ding JH, Cheng J, Cai WB, Sun YM, Ouyang J. [Distribution and drug resistance of pathogens at hematology department of Jiangsu Province from 2014 to 2015: results from a multicenter, retrospective study]. ZHONGHUA XUE YE XUE ZA ZHI = ZHONGHUA XUEYEXUE ZAZHI 2017; 38:602-606. [PMID: 28810329 PMCID: PMC7342276 DOI: 10.3760/cma.j.issn.0253-2727.2017.07.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Indexed: 11/05/2022]
Abstract
Objective: To describe the distribution and drug resistance of pathogens at hematology department of Jiangsu Province from 2014 to 2015 to provide reference for empirical anti-infection treatment. Methods: Pathogens were from hematology department of 26 tertiary hospitals in Jiangsu Province from 2014 to 2015. Antimicrobial susceptibility testing was carried out according to a unified protocol using Kirby-Bauer method or agar dilution method. Collection of drug susceptibility results and corresponding patient data were analyzed. Results: The separated pathogens amounted to 4 306. Gram-negative bacteria accounted for 64.26%, while the proportions of gram-positive bacteria and funguses were 26.99% and 8.75% respectively. Common gram-negative bacteria were Escherichia coli (20.48%) , Klebsiella pneumonia (15.40%) , Pseudomonas aeruginosa (8.50%) , Acinetobacter baumannii (5.04%) and Stenotropho-monas maltophilia (3.41%) respectively. CRE amounted to 123 (6.68%) . Common gram-positive bacteria were Staphylococcus aureus (4.92%) , Staphylococcus hominis (4.88%) and Staphylococcus epidermidis (4.71%) respectively. Candida albicans were the main fungus which accounted for 5.43%. The rates of Escherichia coli and Klebsiella pneumonia resistant to carbapenems were 3.5%-6.1% and 5.0%-6.3% respectively. The rates of Pseudomonas aeruginosa resistant to tobramycin and amikacin were 3.2% and 3.3% respectively. The resistant rates of Acinetobacter baumannii towards tobramycin and cefoperazone/sulbactam were both 19.2%. The rates of Stenotrophomonas maltophilia resistant to minocycline and sulfamethoxazole were 3.5% and 9.3% respectively. The rates of Staphylococcus aureus, Enterococcus faecium and Enterococcus faecalis resistant wards vancomycin were 0, 6.4% and 1.4% respectively; also, the rates of them resistant to linezolid were 1.2%, 0 and 1.6% respectively; in addition, the rates of them resistant to teicoplanin were 2.8%, 14.3% and 8.0% respectively. Furthermore, MRSA accounted for 39.15% (83/212) . Conclusions: Pathogens were mainly gram-negative bacteria. CRE accounted for 6.68%. The rates of Escherichia coli and Klebsiella pneumonia resistant to carbapenems were lower compared with other antibacterial agents. The rates of gram-positive bacteria resistant to vancomycin, linezolid and teicoplanin were still low. MRSA accounted for 39.15%.
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Zhou L, Liu SQ, Zhang J, Wang Y, Han J, Liu YJ. [Capture-mark-recapture analysis on the under-registration rate of mortality surveillance program in Jinan]. ZHONGHUA LIU XING BING XUE ZA ZHI = ZHONGHUA LIUXINGBINGXUE ZAZHI 2017; 38:482-485. [PMID: 28468067 DOI: 10.3760/cma.j.issn.0254-6450.2017.04.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Objective: To evaluate the under-registration rate related to mortality surveillance program in Jinan city, from 2013 to 2014, using the capture-mark-recapture method. Methods: Under the stratified cluster random sampling method, samples were stratified, according to urban and rural areas. Two districts and three counties were chosen, with three towns/streets in each county/district and eight villages/communities in each township/street, randomly selected. With the participation of departments as civil affairs, public security, maternal/child institutions and community committees as well as individuals as village doctors and community leaders, a list of deaths from January 1, 2013 to December 31, 2014 was collected and compared to the National Mortality Surveillance System on the rates related to under-registration. Results: A total of 2 903 records on deaths were collected from 2013 to 2014,while 3 113 deaths were reported in the surveillance system of the same period. 3 772 (95% CI:3 741-3 802) deaths were estimated by the capture-mark-recapture method. The two-year total under-registration rate was 17.46%. The under-registration rates in 2013 and 2014 appeared as 19.29% and 15.57% (χ(2)=8.92, P<0.01), respectively, with the rates in urban and rural areas as 20.91% and 11.93% (χ(2)=47.35, P<0.01). The rates on male and female were 17.87% and 16.98% (χ(2)=0.48, P>0.05). The rates of <5 years old group and ≥5 years old group were 21.57% and 17.45% (χ(2)=0.03, P>0.05) respectively. Conclusions: Under-registration in the mortality surveillance was noticed in Jinan. The capture-mark-recapture method seemed useful for evaluating the under-registration rate in the mortality surveillance program. It is suggested that the survey on under-registration rate should be carried out on the regular base. The under-registration rate seemed useful in adjusting the mortality rate.
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Xiao QM, Qi HN, Wang WZ, Gao X, Zhu BY, Liu YJ, Li W, Ma GY, Wang P, Meng FZ, Gao XF. [Effects of extract of Ginkgo biloba on magnetic resonance imaging and electroencephalography in patients with delayed encephalopathy after acute carbon monoxide poisoning]. ZHONGHUA LAO DONG WEI SHENG ZHI YE BING ZA ZHI = ZHONGHUA LAODONG WEISHENG ZHIYEBING ZAZHI = CHINESE JOURNAL OF INDUSTRIAL HYGIENE AND OCCUPATIONAL DISEASES 2017; 35:145-147. [PMID: 28355708 DOI: 10.3760/cma.j.issn.1001-9391.2017.02.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To observe the effects of extract of Ginkgo biloba (Ginaton) on magnetic resonance imaging (MRI) and electroencephalography (EEG) in patients with delayed encephalopathy after acute carbon monoxide poisoning. Methods: The 84 patients with delayed encephalopathy after acute carbon monoxide poisoning treated in our hospital from Jan. 2011 to Apr. 2016 were randomly divied into therapy group and observation group. The therapy group received routine treatments of hyperbaric oxygen, cure cerebral edema and promote brain cell metabolism, and observation group was given intravenous injection (intravenous drip) Ginaton 70 mg (adding 0.9% sodium chloride injection 250 ml) , once a day, 2 weeks for one therapeutic course. The changes of MRI and EEG before and after treatment between therapy group and observation group were observed. Results: In the observation group, the white matter and globus pallidus lesions of 14 d after treatment were smaller than those in the treatment group, and the abnormal signal intensity was decreased. At 14 days after treatment the improvement of EEG in observation group were better than therapy group (P<0.05) . Conclusion: Early treatment of extract of Ginkgo biloba (Ginaton) in delayed encephalopathy after acute carbon monoxide poisoning can effectively improve lesion and signal on MRI and abnormal rate on EEG. It has a certain therapeutic effect in clinical.
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Wang WZ, Qi HN, Xiao QM, Gao X, Zhu BY, Li J, Liu YJ, Li W, Ma GY, Wang P. [Effects of Ginaton on nitric oxide and nitric oxide synthase in patients with delayed encephalopathy after carbon monoxide poisoning]. ZHONGHUA LAO DONG WEI SHENG ZHI YE BING ZA ZHI = ZHONGHUA LAODONG WEISHENG ZHIYEBING ZAZHI = CHINESE JOURNAL OF INDUSTRIAL HYGIENE AND OCCUPATIONAL DISEASES 2017; 35:30-33. [PMID: 28241699 DOI: 10.3760/cma.j.issn.1001-9391.2017.01.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To observe the effects of Ginaton on blood nitric oxide (NO) and nitric oxide synthase (NOS) in patients with delayed encephalopathy after acute carbon monoxide poisoning (DEACMP). Methods: A total of 116 patients with DEACMP who were treated in Emergency Department of Harrison International Peace Hospital Affiliated to Hebei Medical University from January 2012 to April 2016 were enrolled and ran-domly divided into control group and treatment group using a random number table, with 58 patients in each group. The patients in the control group were given conventional treatment including hyperbaric oxygen, preven-tion and treatment of cerebral edema, and promotion of brain cell metabolism, and those in the treatment group were given Ginaton in addition to the conventional treatment. The course of treatment was 2 weeks for both groups. The levels of neuron-specific enolase (NSE) , NO, NOS, and inducible nitric oxide synthase (iNOS) were measured before treatment and at 2 weeks after treatment, and the change in Mini-Mental State Examina-tion (MMSE) score and clinical outcome were observed in both groups. The correlation between the blood NO level on admission and the MMSE score was analyzed. Results: There was a significant difference in the overall response rate between the treatment group and the control group (81.03% vs 62.07%, χ(2) = 5.124, P=0.024). Be-fore treatment, there were no significant differences in the levels of NO and NSE, the activity of NOS and iN-OS, and MMSE score between the two groups (P>0.05). After treatment, both groups showed reductions in the levels of NO and NSE and the activity of NOS and iNOS, but the treatment group had significantly greater reduc-tions compared with the control group (P<0.05). Both groups showed a significant increase in the MMSE score after treatment, while the treatment group had a significantly greater increase compared with the control group (P<0.05). In the patients with DEACMP, the blood NO level on admission was negatively correlated with the MMSE score (r=-0.268, P=0.004). Conclusion: In the treatment of patients with DEACMP, Ginaton can effectively reduce the levels of NO and NSE and the activity of NOS and iNOS, increase the MMSE score, and promote the recovery of neurological function.
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Ju Y, Liu AL, Wang HQ, Liu YJ, Liu JH, Chen AL, Chen LH, Li Y, Han Z. [Value of single-source dual-energy CT (ssDECT) in differentiating lipid-poor adrenal adenomas from metastatic lesions]. ZHONGHUA ZHONG LIU ZA ZHI [CHINESE JOURNAL OF ONCOLOGY] 2016; 38:826-832. [PMID: 27998440 DOI: 10.3760/cma.j.issn.0253-3766.2016.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the value of single-source dual-energy CT (ssDECT) in differentiating lipid-poor adenomas from metastases in adrenal glands. Methods: From August 2011 to Oct 2014, 63 patients with 73 adrenal nodules (53 metastases proven by 5-6 months follow-up, and 20 histopathologically proven adenomas, CT value > 10 HU) underwent ssDECT scanning. The CT values of conventional polychromatic CT and virtual monochromatic images (40-140 keV) , fat-water density images and effective atomic number (eff-Z) were reconstructed on an ADW4.5 workstation and ROC curves were then constructed to evaluate the effectiveness of each parameter. The slope of spectral curve was measured and divided into 3 types: increment curve (K>0.1), straight curve (-0.1≤K≤0.1) and decrement curve (K< -0.1) according to the slope (the value of K) of spectral curve, and the curve patterns in the two groups were compared statistically. Results: There was no statistical difference between the mean CT values of metastases (35.12±5.29)HU and lipid-poor adenomas (32.48±6.94)HU by conventional polychromatic CT (P>0.05). The range of single-energy CT values of metastases [from (53.00±15.12) HU to (33.38±5.67) HU] was significantly higher than that of lipid-poor adenomas [from (26.90±26.94) HU to (28.77±10.66) HU] at energy levels ranging from 40 to 80 keV (P<0.05). There was no significant difference between the single-energy CT value of metastases and lipid-poor adenomas at energy levels ranging from 90 to 140 keV (P>0.05). The median fat-water concentration of metastases was -164.61 μg/cm3, significantly lower than that of lipid-poor adenomas (114.32 μg/cm3,P<0.05). The eff-Z of metastases (7.76±0.15) was also significantly higher than that of lipid-poor adenomas (7.50±0.25, P<0.05). When the threshold of fat-water concentration was -143.89 μg/cm3, the sensitivity, specificity and accuracy rate of metastasis diagnosis was 70.0%, 66.0%, and 76.7%, respectively. When the threshold of eff-Z was 7.63, the sensitivity, specificity and accuracy rate of metastasis diagnosis was 83.0%, 65.0%, and 80.4%, respectively. The lower the energy, the higher the diagnostic accuracy at energy levels ranging from 40 to 80 keV, and that of 40 keV was the highest. The spectral curves of metastases included 2 (3.8%) ascending curves, 9 (17.0%) straight curves and 42 (79.2%) descending curves, while in the 20 lipid-poor adenomas, there were 9 (45.0%) ascending curves, 4 (20.0%) straight curves and 7 (35.0%) descending curves, showing significant differences between the two groups (P<0.05). Conclusions: Single-source dual-energy CT provides an effective multi-parameter approach for differentiating lipid-poor adrenal adenomas from metastases.
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Liu YJ, Xiao QM, Li W. [A case of mediastinal emphysema following gastric lavage for oral doxepin poisoning]. ZHONGHUA LAO DONG WEI SHENG ZHI YE BING ZA ZHI = ZHONGHUA LAODONG WEISHENG ZHIYEBING ZAZHI = CHINESE JOURNAL OF INDUSTRIAL HYGIENE AND OCCUPATIONAL DISEASES 2016; 34:690-691. [PMID: 27866550 DOI: 10.3760/cma.j.issn.1001-9391.2016.09.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
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Su WT, Liu YJ, Huang TY. Nanofibers promote HepG2 aggregate formation and cellular function. GENETICS AND MOLECULAR RESEARCH 2016; 15:gmr8993. [PMID: 27706664 DOI: 10.4238/gmr.15038993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Formation of hepatocyte spheroids is a necessary strategy for increasing liver-specific function in vitro. In this study, HepG2 cells showed good viability when grown on a polylactic acid-chitosan (PLA-CS) nanofiber and aggregated to form multicellular spheroids on the PLA-CS nanofibers with a diameter of approximately 100-200 mm in 5 days of culture, whereas no such aggregation was observed in cells cultured on 24-well plates. Hepatocyte spheroids formed on the PLA-CS nanofibers displayed excellent hepatic-related protein expression, such as albumin and urea, compared to HepG2 cells cultured on the 24-well plates. These results indicated that formation of the hepatocyte spheroids in nanofibers can increase and maintain hepatocyte functions for a longer time, supporting a new strategy for bioartificial liver development.
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Gao X, Zhu BY, Wang WZ, He JQ, Han DL, Liu YJ, Meng H, Xiao QM, Liu XT, Han YY. [Clinical value of serum presepsin (SCD14-ST) concentration measurement in patients with pesticide poisoning]. ZHONGHUA LAO DONG WEI SHENG ZHI YE BING ZA ZHI = ZHONGHUA LAODONG WEISHENG ZHIYEBING ZAZHI = CHINESE JOURNAL OF INDUSTRIAL HYGIENE AND OCCUPATIONAL DISEASES 2016; 34:333-6. [PMID: 27514411 DOI: 10.3760/cma.j.issn.1001-9391.2016.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate the value of serum presepsin concentration measurement in the clinical diagnosis and treatment of patients with pesticide poisoning patients. METHODS A total of 160 patients with pesticide poisoning were enrolled as study subjects and divided into moderate organophosphate pesticide poisoning group (40 patients) , severe organophosphate pesticide poisoning group (40 patients) , abamectin pesticide poisoning group (40 patients) , and paraquat poisoning group (40 patients). A total of 20 healthy volunteers were enrolled as the control group. All the patients with poisoning received conventional treatment of pesticide poisoning immediately after admission, and serum presepsin concentration was measured on days 1 (within 24 hours after poisoning) , 3, and 7 of admission, and biochemical and radiological parameters related to the patient's condition were also examined. The patients with a Presepsin concentration of >800 pg/ml on day 1 of admission were randomly divided into conventional treatment group and ulinastatin treatment group, and the treatment outcome was compared between the two groups. RESULTS Compared with the healthy control group, the groups with pesticide poisoning showed significant increases in serum Presepsin concentrations, with the highest degree of increase on day 1 (P <0.05). The serum Presepsin concentration was positively correlated with alanine aminotransferase, aspartate aminotransferase, creatine kinase, creatine kinase MB, lactate dehydrogenase, serum creatinine, blood urea nitrogen, interleukin-18, and white blood cell count, but negatively correlated with cholinesterase. In the conventional treatment group and ulinastatin treatment group, the overall response rate was 68% and 78.8%, respectively, with a significant difference between the two groups (P<0.05). In 40 patients with paraquat poisoning, 32 experienced an increase in serum presepsin concentration, and among these 32 patients, 27 (83%) experienced exudation on lung CT. CONCLUSION Serum Presepsin concentration measurement can assist early diagnosis, evaluation of disease severity, and guidance for clinical medication in patients with pesticide poisoning, especially in those with severe pesticide poisoning and a tendency to multiple organ failure.
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Liu YJ, Zhang JY, Li AM, Liu ZW, Zhang YY, Sun XH. Detection of Piwi-interacting RNAs based on sequence features. GENETICS AND MOLECULAR RESEARCH 2016; 15:gmr8638. [PMID: 27323033 DOI: 10.4238/gmr.15028638] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Piwi-interacting RNAs (piRNAs) are a class of small non-coding RNAs. Distinguishing piRNAs from other non-coding RNAs is important because of their important role in the physiological regulation of spermatogenesis, genome protection from transposons, and regulation of mRNAs and long non-coding RNAs. Few computational studies have addressed piRNAs detection, and both effectiveness and efficiency of piRNA detection tools require improvement. In this study, a piRNA detection method based on sequence features and a support vector machine was developed. Four types of features are proposed: weighted k-mer, weighted k-mer with wildcards, position-specific base, and piRNA length. The piRNA sequences from human, mouse, rat, and drosophila were respectively used in this experiment. Compared to existing algorithms, the proposed method provides a better balance between precision and sensitivity (both are approximately 90%), and although these values were slightly slower than those obtained using the piRNA annotation approach, the proposed method was four-fold faster than piRPred and 229-fold faster than piRNA predictor.
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Liu YJ, Zhang JY. Time-series microarray data simulation modeled with a case-control label. GENETICS AND MOLECULAR RESEARCH 2016; 15:gmr7287. [PMID: 27323009 DOI: 10.4238/gmr.15027287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
With advances in molecular biology, microarray data have become an important resource in the exploration of complex human diseases. Although gene chip technology continues to grow, there are still many barriers to overcome, such as high costs, small sample sizes, complex procedures, poor repeatability, and the dependence on data analysis methods. To avoid these problems, simulation data have a vital role in the study of complex diseases. A simulation method of microarray data is introduced in this study to model the occurrence and development of general diseases. Using classic statistics and control theory, five risk models are proposed. One or more models can be introduced into the baseline simulation dataset with a case-control label. In addition, time-series gene expression data can be generated to model the dynamic evolutionary process of a disease. The prevalence of each model is estimated and disease-associated genes are tested by significance analysis of microarrays. The source code, written in MATLAB, is freely and publicly available at http://sourceforge.net/projects/genesimulation/files/.
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An Y, Tian W, Zeng C, Li JN, Liu YJ. [Feasible study for evaluating upper cervical reduction by the clivo-axial angle]. BEIJING DA XUE XUE BAO. YI XUE BAN = JOURNAL OF PEKING UNIVERSITY. HEALTH SCIENCES 2016; 48:215-217. [PMID: 27080269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE To measure the clivo-axial angle (CAA) and cervicomedullary angle (CMA) in upper cervical deformity patients who underwent computer-assisted posterior upper cervical reduction and fixation surgery, and analyze their correlation. METHODS In the study, 25 patients with symptomatic upper cervical deformity were chosen for measurement of preoperative and postoperative CMA and CAA using magnetic resonance imaging (MRI) and intraoperative C-arm. The angle between the clivus plane and the straight line parallel to that of the posterior margin of the C2 vertebral body was defined as CAA; moreover, the angle between the straight line parallel to the ventral side of the cervical spinal cord and the straight line parallel to that of the ventral side of the medulla oblongata was defined as CMA. Two experienced spinal surgeons performed the measurements. The CAA and CMA were measured three times, and the mean value was considered as the result. RESULTS Analyses of the CAA and CMA were performed with Wilcoxon rank test, which showed that there was consistency between the CAAs measured with MRI and intraoperative C-arm. The result showed that the postoperative CAA and CMA increased significantly compared with preoperation (P<0.001). Through Spearman rank correlation analysis, the preoperative CAA was positively correlative with the CMA (r=0.902, P<0.001), and so was the postoperative CAA (r=0.921, P<0.001). CONCLUSION Preoperative and postoperative CAA in upper cervical deformity patients is significantly correlative with preoperative and postoperative CMA. CAA can be measured during surgery using intraoperative CT or C-arm based three-dimension navigation, and may predict the patient's CMA, which cannot be measured during operation, but is essential for evaluating the decompression and reduction of the spinal cord.
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Khoo EH, Leong ESP, Wu SJ, Phua WK, Hor YL, Liu YJ. Effects of asymmetric nanostructures on the extinction difference properties of actin biomolecules and filaments. Sci Rep 2016; 6:19658. [PMID: 26792371 PMCID: PMC4726270 DOI: 10.1038/srep19658] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 12/09/2015] [Indexed: 01/28/2023] Open
Abstract
In this paper, symmetric and asymmetric tapering on the arms of the gammadion nanostructure is proposed to enhance both local field distribution and extinction difference (ED). The asymmetric tapered gammadion with tapering fraction (TF) of 0.67 is seen to have the largest ED and spatial local field distribution, producing a large wavelength shift of more than 50 percent as compared to the untapered gammadion nanostructures when immersed in a solution of actin molecules and filaments. The optical chirality, ζ shows that the larger local field amplitudes produced by the asymmetric designs increases the rate of chiral molecules excitation. This enhanced field is strongly rotating and highly sensitive to single molecules and larger filaments. Here, we show that the ED, optical chirality, sensitivity and rate of chiral molecules excitation can be improved by incorporating asymmetric designs into chiral gammadion nanostructures through tapering.
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Yang XL, Liu YJ, Hu LQ, Guo LW, Liu GP, Wu B, Chen HC. Protective efficacy of a genetic subunit bacterin against edema disease of swine in mice. GENETICS AND MOLECULAR RESEARCH 2015; 14:18026-33. [PMID: 26782450 DOI: 10.4238/2015.december.22.29] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The exotoxin SLT-IIeB from the Escherichia coli Ee strain was expressed in E. coli, and the recombinant protein was purified, mixed with the Ee strain, then emulsified with oil-emulsion adjuvants to obtain a mixed subunit bacterin. Groups of Kunming mice were immunized at weeks 0 and 2, and challenged intraperitoneally with the Ee strain at week 4. Antibodies were detected by ELISA and an agglutination test. After the second immunization, the antibody level increased and the rate of immune protection against the Ee strain was 70 and 91.7% in the subunit bacterin and bacterin groups, respectively. Therefore, the mixed subunit bacterin provided good protection against the homologous Ee strain, which provides a basis for further research, into high-efficacy vaccines against porcine edema disease.
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Hou WW, Zhang XJ, Shi JB, Liu YJ. Genetic diversity analysis of faba bean (Vicia faba L.) germplasms using sodium dodecyl sulfate-polyacrylamide gel electrophoresis. GENETICS AND MOLECULAR RESEARCH 2015; 14:13945-53. [PMID: 26535710 DOI: 10.4238/2015.october.29.15] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
To investigate genetic diversity and relationships of 101 faba bean (Vicia faba L.), landraces and varieties from different provinces of China and abroad were analyzed by sodium dodecyl sulfate (SDS)-polyacrylamide gel electrophoresis (PAGE). A total of 2625 unambiguous and stable bands from 101 germplasms were detected, and 36 different bands were classified according to the electrophoretic mobility patterns of the proteins as determined by the SDS-PAGE analysis, of which 16 were polymorphic. Besides the common bands, the protein bands of 92, 75, 62, 40, 34, 17, and 13 kDa presented the highest frequencies of 92.08, 90.10, 99.01, 95.05, 95.05, 98.02, and 95.05%, respectively. The other 29 polymorphic protein bands showed higher polymorphism with 16.09 polymorphic bands in average. The genetic similarity of the 101 genotypes tested varied from 0.6111 to 0.9722, with an average of 0.7122. Cluster analysis divided the 101 genotypes into six major clusters, which was consistent with the systematic classification of faba bean done in previous studies. The overall results indicated that SDS-PAGE was a useful tool for genetic diversity analysis and laid a solid foundation for future faba bean breeding.
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Gao XB, Xiao M, Wang J, Liu YJ, Liu QZ, Qi ML. Optimization of candidate proteins for serological screening of Chlamydia trachomatis infection. GENETICS AND MOLECULAR RESEARCH 2015; 14:12240-6. [PMID: 26505372 DOI: 10.4238/2015.october.9.12] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The aim of this study was to optimize candidate antigen proteins for serological screening of Chlamydia trachomatis infection. C. trachomatis positive serum and swabs of genital secretions were collected from 50 patients in the Tianjin Medical University General Hospital, as well as from 30 patients negative for C. trachomatis. Samples were assessed by colloidal gold assay in a sexually transmitted disease clinic as follows: serum antibodies for eight kinds of C. trachomatis immunodominant proteins (Pgp3, CPAF, CT143, CT101, CT694, CT875, CT813, and IncA) were detected, and two traditional gold standards, immunofluorescence and C. trachomatis cell culture of genital secretions, were used for comparison in order to determine the antigen protein combinations with the highest sensitivity and specificity. Of the 50 samples that tested positive for C. trachomatis infection by colloidal gold assay, 44 tested positive by micro-immunofluorescence, whereas 6 tested negative. In contrast, 14 samples tested positive by cell culture, whereas 36 tested negative. Serological results of the immunodominant protein combination of Pgp3, CT694, and CT875 shared positive coincidence rates of 97.73 and 92.86% with C. trachomatis micro-immunofluorescence and cell culture, respectively. No antibodies of the three proteins were detected in the 30 C. trachomatis samples that tested negative by colloidal gold assay; these samples also tested negative in C. trachomatis genital secretion culture. Overall, the combination of the three immunodominant proteins Pgp3, CT694, and CT875 had good sensitivity and specificity for serological screening of C. trachomatis infection, and the process was simple and easy to apply.
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93
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Liu YJ, Song G, Yin HM. Boundary effect on the elastic field of a semi-infinite solid containing inhomogeneities. Proc Math Phys Eng Sci 2015; 471:20150174. [PMID: 26345084 DOI: 10.1098/rspa.2015.0174] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 05/14/2015] [Indexed: 11/12/2022] Open
Abstract
The boundary effect of one inhomogeneity embedded in a semi-infinite solid at different depths has firstly been investigated using the fundamental solution for Mindlin's problem. Expanding the eigenstrain in a polynomial form and using the Eshelby's equivalent inclusion method, one can calculate the eigenstrain and thus obtain the elastic field. When the inhomogeneity is far from the boundary, the solution recovers Eshelby's solution. The method has been extended to a many-particle system in a semi-infinite solid, which is first demonstrated by the cases of two spheres. The comparison of the asymptotic form solution with the finite-element results shows the accuracy and capability of this method. The solution has been used to illustrate the boundary effects on its effective material behaviour of a semi-infinite simple cubic lattice particulate composite. The local field of a semi-infinite composite has been calculated at different volume fractions. A representative unit cell has been taken with different depths to the surface. The average stress and strain of the unit cell have been calculated under uniform loading conditions of normal or shear force on the surface, respectively. The effective elastic moduli of the unit cell not only depend on the material proportion, but also on its distance to the surface. The present model can be extended to other types of particle distribution and ellipsoidal particles.
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94
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Hao LZ, Gao W, Liu YJ, Han ZD, Xue QZ, Guo WY, Zhu J, Li YR. High-performance n-MoS2/i-SiO2/p-Si heterojunction solar cells. NANOSCALE 2015; 7:8304-8308. [PMID: 25884108 DOI: 10.1039/c5nr01275a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A solar cell based on the n-MoS2/i-SiO2/p-Si heterojunction is fabricated. The device exhibits a high power-conversion efficiency of 4.5% due to the incorporation of a nano-scale SiO2 buffer into the MoS2/Si interface. The present device architectures are envisaged as potentially valuable candidates for high-performance photovoltaic devices.
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95
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Peng W, Liu YJ, Zhao CB, Huang XS, Wu N, Hu MB, Xie DS, Wu CJ. In silico Assessment of Drug-like Properties of Alkaloids from Areca catechu L Nut. TROP J PHARM RES 2015. [DOI: 10.4314/tjpr.v14i4.11] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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96
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Ma WH, Liu YJ, Wang W, Zhang YZ. Neuropeptide Y, substance P, and human bone morphogenetic protein 2 stimulate human osteoblast osteogenic activity by enhancing gap junction intercellular communication. ACTA ACUST UNITED AC 2015; 48:299-307. [PMID: 25714881 PMCID: PMC4418359 DOI: 10.1590/1414-431x20144226] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 11/13/2014] [Indexed: 01/05/2023]
Abstract
Bone homeostasis seems to be controlled by delicate and subtle “cross talk” between
the nervous system and “osteo-neuromediators” that control bone remodeling. The
purpose of this study was to evaluate the effect of interactions between
neuropeptides and human bone morphogenetic protein 2 (hBMP2) on human osteoblasts. We
also investigated the effects of neuropeptides and hBMP2 on gap junction
intercellular communication (GJIC). Osteoblasts were treated with neuropeptide Y
(NPY), substance P (SP), or hBMP2 at three concentrations. At various intervals after
treatment, cell viability was measured by the MTT assay. In addition, cellular
alkaline phosphatase (ALP) activity and osteocalcin were determined by colorimetric
assay and radioimmunoassay, respectively. The effects of NPY, SP and hBMP on GJIC
were determined by laser scanning confocal microscopy. The viability of cells treated
with neuropeptides and hBMP2 increased significantly in a time-dependent manner, but
was inversely associated with the concentration of the treatments. ALP activity and
osteocalcin were both reduced in osteoblasts exposed to the combination of
neuropeptides and hBMP2. The GJIC of osteoblasts was significantly increased by the
neuropeptides and hBMP2. These results suggest that osteoblast activity is increased
by neuropeptides and hBMP2 through increased GJIC. Identification of the
GJIC-mediated signal transduction capable of modulating the cellular activities of
bone cells represents a novel approach to studying the biology of skeletal
innervation.
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97
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Wu FP, Wang J, Wang H, Liu YJ, Li N, Liu ZK. Chest wall recurrence location and the lower-bound target of preventive radiotherapy after transverse incision in modified radical mastectomy. GENETICS AND MOLECULAR RESEARCH 2015; 14:1068-75. [PMID: 25730046 DOI: 10.4238/2015.february.6.10] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We investigated the relationship between the lower-bound target of preventive radiation to the chest wall after modified radical mastectomy with a transverse incision and preoperative breast carcinoma characteristics to provide a basis for reducing radiation injury to neighboring tissues and individualizing preventive chest wall radiation targets. We analyzed the relationship between clinical stage, pathology, diseased region, condition of vessel tumor embolus, sex hormone levels, HER-2 expression levels, receipt of chemotherapy, and the distance of local chest wall recurrence under the edge of the transverse incision in 112 patients with local chest wall recurrence after radical mastectomy. There were 64 cases (57.1%) with local chest wall recurrence within 3 cm below the transverse incision fringe, 31 cases (27.7%) within 3-5 cm, 14 cases (12.5%) within 5-7 cm, and 3 cases (2.7%) exceeded 7 cm. There were statistically significant correlations between the distance from the focus of the chest wall recurrence to the inferior margin of the transverse incision and the T stage, HER-2 expression levels, and receipt of chemotherapy. For more than 97% of patients undergoing radical mastectomy with a transverse incision, the distance of local chest wall recurrence under the edge of the transverse incision was less than 7 cm. To accomplish individualized treatment in defining radiotherapy targets, we should pay attention to T stage, HER- 2 expression levels, and the receipt of chemotherapy when determining the lower-bound location of the target for preventive chest wall radiation after modified radical mastectomy with a transverse incision.
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Liu YJ, Leng XP, Du GQ, Wang XD, Tian JW, Ren M. Two-dimensional longitudinal strains and torsion analysis to assess the protective effects of ischemic postconditioning on myocardial function: a speckle tracking echocardiography study in rabbits. ULTRASONICS 2015; 56:344-353. [PMID: 25257298 DOI: 10.1016/j.ultras.2014.08.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 08/15/2014] [Accepted: 08/30/2014] [Indexed: 06/03/2023]
Abstract
The reperfusion injury that occurs in the early reperfusion often results in myocardial dysfunction. This study evaluated global and regional left ventricular (LV) function using speckle tracking echocardiography (STE) in a rabbit ischemia-reperfusion (I/R) model with and without ischemic postconditioning (I-PostC). The aim is to investigate the potential benefit of I-PostC for myocardial function and validate whether regional longitudinal strain is an appropriate index to indicate myocardial dysfunction. Forty rabbits were divided into an ischemia-reperfusion group (group I) and an I-PostC group (group II). After the coronary arteries were ligated, LV systolic strain and twist parameters decreased, and absolute value of strain rate of isovolumetric relaxation period (SRivr) and post-systolic strain index (PSI) increased significantly in both groups (all p<0.05). After reperfusion, regional longitudinal systolic strain rate (SRsys), systolic strain (Ssys), LV twist and untwisting rate increased, and SRivr and PSI decreased in group II. These changes were not seen in group I. All STE parameters were correlated with area of necrosis (AN)/area at risk (AR) (all p<0.05). The correlations were morerelevant between SRsys and AN/AR (r=-0.673) and between Ssys and AN/AR (r=-0.777) (both p<0.001). The intra- and inter-observer repeatability of STE parameters were good with correlation coefficients (CCs) >0.8 or 0.6. The sensitivities of GSRsys, GSsys, SRsys, Ssys, and LV twist to detect the myocardial infarction were 81.3%, 62.5%, 87.5%, 93.8% and 81.3%, respectively. And the specificities of those parameters were 75.0%, 81.2%, 75.0%, 87.5% and 68.7%. These results indicate that STE is useful for quantitative detection on myocardial function improvement induced by I-PostC in a rabbit I/R model. The regional index-Ssys is an appropriate parameter to indicate myocardial dysfunction because of its sensitivity, specificity, and repeatability.
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Li GT, Li GR, Liu YJ, Li XF, Guo SZ. Efficacy of chlortetracycline treatment on vulvar non-neoplastic epithelial disorders. CLIN EXP OBSTET GYN 2015; 42:199-201. [PMID: 26054119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To observe the effectiveness of chlortetracycline (aureomycin) treatment on vulval white lesions and to explore its possible pathogenesis. MATERIALS AND METHODS From January 2001 to April 2011, 194 patients with vulvar non-neoplastic epithelial disorders were divided into three groups according to therapy regimens received, ie, chlortetracycline treatment group (72 cases), chlortetracycline + beclomethasone treatment group (66 cases), and beclomethasone treatment group (56 cases); their local changes of vulvar lesions were observed and efficacy of these treatment profiles was evaluated after one year. RESULTS Effective rates of chlortetracycline group, chlortetracycline + clobetasol group and clobetasol groups were 86.1% (62/72), 87.9% (58/66), and 62.5% (35/56), respectively. There was a significant difference among these three groups (Hc = 10.7766,p = 0.0046), the curative rate of clobetasol group was markedly lower than that of the former two groups (p = 0.0072 and p = 0.0019), but was not statistical significant (p = 0.6077) when compared between the former groups. CONCLUSION The occurrence of vulvar non-neoplastic epithelial disorders may be associated with chlamydia and mycoplasma infection, the chlortetracycline is an effective drug for this illness, the mechanism of which might be related to killing pathogens directly and inhibiting inflammatory mediators.
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Ma WH, Liu YJ, Wang W, Zhang YZ. Improved biological performance of magnesium by micro-arc oxidation. ACTA ACUST UNITED AC 2014; 48:214-25. [PMID: 25517917 PMCID: PMC4381941 DOI: 10.1590/1414-431x20144171] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Accepted: 10/06/2014] [Indexed: 11/22/2022]
Abstract
Magnesium and its alloys have recently been used in the development of lightweight, biodegradable implant materials. However, the corrosion properties of magnesium limit its clinical application. The purpose of this study was to comprehensively evaluate the degradation behavior and biomechanical properties of magnesium materials treated with micro-arc oxidation (MAO), which is a new promising surface treatment for developing corrosion resistance in magnesium, and to provide a theoretical basis for its further optimization and clinical application. The degradation behavior of MAO-treated magnesium was studied systematically by immersion and electrochemical tests, and its biomechanical performance when exposed to simulated body fluids was evaluated by tensile tests. In addition, the cell toxicity of MAO-treated magnesium samples during the corrosion process was evaluated, and its biocompatibility was investigated under in vivo conditions. The results of this study showed that the oxide coating layers could elevate the corrosion potential of magnesium and reduce its degradation rate. In addition, the MAO-coated sample showed no cytotoxicity and more new bone was formed around it during in vivo degradation. MAO treatment could effectively enhance the corrosion resistance of the magnesium specimen and help to keep its original mechanical properties. The MAO-coated magnesium material had good cytocompatibility and biocompatibility. This technique has an advantage for developing novel implant materials and may potentially be used for future clinical applications.
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