1.Correlation between level of TSH receptor antibody and activity of Graves ophthalmopathy after treatment with glucocorticoid
Hai-Bing JU ; Guang-Lin WANG ; Deng-Ming HU ; Zi-Zhen SHU ; Zi-Yin ZHU ; Fei-Fei SHEN ;
Chinese Journal of Endocrinology and Metabolism 2001;0(05):-
Fifty-six patients with Graves' ophthalmopathy(GO)were treated with antithyroid drug and oral prednisone for three months,TSH receptor antibody(TRAb)level was reduced,GO activity and severity of some patients were ameliorated but still positively associated with TRAb.It suggests that TRAb not only triggers off GO but also plays a possible role in the maintenance of the autoimmune process in GO.
2.Application of Google Earth in the three dimensional visualization(TDV)of the warnings signaled by early warning system of infectious disease
Fei YIN ; Zi-Jian FENG ; Xiao-Song LI
Chinese Journal of Epidemiology 2011;32(4):396-399
The purpose of this article was to investigate the application of Google Earth (GE)in the Three Dimensional Visualization(TDV)of the warnings signaled by early warning system of infectious disease.As an example.the prospective space-time scan statistics was used by mimicking daily prospective analyses of bacillary dysentery data from Shanghai municipality,Zhejiang province and Jiangsu province in 2005.Then one of the warnings was picked to illustrate the visualization of GE.GE could vividly display the results in three dimensions containing the complex information including date,areas,observed numbers,expected numbers ere.GE seemed a useful tool for infectious disease surveillance and had potential important values in reflecting the emergency response situation.The development of integrated system which consisted of GE,the infectious disease reporting system and cluster detection methods need to be emphasized for further research.
3.The application of the prospective space-time statistic in early warning of infectious disease.
Fei YIN ; Xiao-Song LI ; Zi-Jian FENG ; Jia-Qi MA
Chinese Journal of Preventive Medicine 2007;41 Suppl():155-158
OBJECTIVETo investigate the application of prospective space-time scan statistic in the early stage of detecting infectious disease outbreaks.
METHODSThe prospective space-time scan statistic was tested by mimicking daily prospective analyses of bacillary dysentery data of Chengdu city in 2005 (3212 cases in 102 towns and villages). And the results were compared with that of purely temporal scan statistic.
RESULTSThe prospective space-time scan statistic could give specific messages both in spatial and temporal. The results of June indicated that the prospective space-time scan statistic could timely detect the outbreaks that started from the local site, and the early warning message was powerful (P = 0.007). When the merely temporal scan statistic for detecting the outbreak was sent two days later, and the signal was less powerful (P = 0.039).
CONCLUSIONThe prospective space-time scan statistic could make full use of the spatial and temporal information in infectious disease data and could timely and effectively detect the outbreaks that start from the local sites. The prospective space-time scan statistic could be an important tool for local and national CDC to set up early detection surveillance systems.
China ; Communicable Disease Control ; methods ; Communicable Diseases ; epidemiology ; Humans ; Models, Statistical ; Population Surveillance ; methods ; Prospective Studies
4.Construction and expression of recombinant adenovirus containing secreted endostatin in liver stem cell as a vector for gene therapy.
Xiao-gang ZHONG ; Wu YIN ; Shun-rong HUANG ; Qian-zi QIN ; Wei MAI ; Fei LIU ; Rui HUANG ; Dan-rong LI
Chinese Journal of Hepatology 2009;17(8):628-629
Adenoviridae
;
genetics
;
Animals
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Carcinoma, Hepatocellular
;
therapy
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Cell Line
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Endostatins
;
genetics
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metabolism
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Genetic Therapy
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methods
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Genetic Vectors
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Green Fluorescent Proteins
;
metabolism
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Humans
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Liver
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cytology
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metabolism
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Liver Neoplasms
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therapy
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Plasmids
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genetics
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Polymerase Chain Reaction
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RNA, Messenger
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genetics
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metabolism
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Rats
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Recombination, Genetic
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Stem Cells
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cytology
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metabolism
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Transfection
5.An ultra-sensitive and easy-to-use assay for sensing human UGT1A1 activities in biological systems
Ya-Di ZHU ; Hui-Lin PANG ; Qi-Hang ZHOU ; Zi-Fei QIN ; Qiang JIN ; Moshe FINEL ; Yi-Nan WANG ; Wei-Wei QIN ; Yin LU ; Dan-Dan WANG ; Guang-Bo GE
Journal of Pharmaceutical Analysis 2020;10(3):263-270
The human UDP-glucuronosyltransferase 1A1 (UGT1A1), one of the most essential conjugative enzymes, is responsible for the metabolism and detoxification of bilirubin and other endogenous substances, as well as many different xenobiotic compounds. Deciphering UGT1A1 relevance to human diseases and characterizing the effects of small molecules on the activities of UGT1A1 requires reliable tools for probing the function of this key enzyme in complex biological matrices. Herein, an easy-to-use assay for highly-selective and sensitive monitoring of UGT1A1 activities in various biological matrices, using liquid chromatography with fluorescence detection (LC-FD), has been developed and validated. The newly developed LC-FD based assay has been confirmed in terms of sensitivity, specificity, precision, quanti-tative linear range and stability. One of its main advantages is lowering the limits of detection and quantification by about 100-fold in comparison to the previous assay that used the same probe substrate, enabling reliable quantification of lower amounts of active enzyme than any other method. The precision test demonstrated that both intra- and inter-day variations for this assay were less than 5.5%. Further-more, the newly developed assay has also been successfully used to screen and characterize the regu-latory effects of small molecules on the expression level of UGT1A1 in living cells. Overall, an easy-to-use LC-FD based assay has been developed for ultra-sensitive UGT1A1 activities measurements in various biological systems, providing an inexpensive and practical approach for exploring the role of UGT1A1 in human diseases, interactions with xenobiotics, and characterization modulatory effects of small mole-cules on this conjugative enzyme.
6.The current epidemic situation and surveillance regarding hemorrhagic fever with renal syndrome in China, 2010
Li-Yong HUANG ; Hang ZHOU ; Wen-Wu YIN ; Qin WANG ; Hui SUN ; Fan DING ; Teng-Fei MAN ; Qun LI ; Zi-Jian FENG
Chinese Journal of Epidemiology 2012;33(7):685-691
Objective To analyze the surveillance data on hemorrhagic fever with renal syndrome (HFRS) including the epidemiological characteristics and trend of the disease,in 2010.Methods Descriptive methods were conducted to analyze the surveillance data in 2010 which were collected from the internet-based National Notifiable Disease Reporting System and 40 HFRS sentinels in China.Results There were 9526 cases of HFRS reported in 2010 in the country with an annual morbidity of 0.71/105,which was higher than that reported in 2009.And the case fatality rate in 2010 was 1.24%.During the year 2010,most cases were reported in spring and autumn-winter season,with November as the peak month.The proportion of cases reported in autumn-winter season was higher than that in spring.The number of cases reported in males was higher than that in females among all the age groups,and similar pattern of mortality could be seen in most of the age groups.The percentage of cases over 60 years old had increased in recent years.Farmers were still under the highest risk.Density and the virus-carrying rate of animal hosts,as well as the infection rate were relatively stable and similar to the previous findings.As to the prevailing species,Apodemus agrarius and Rattus norvegicus were still the most common and leading animal hosts.However,the dominant species in sentinel of Yunnan were Rattus flavipectus and Eothenomys miletus respectively,and a new hantavirus called LUXV was found,namely Eothenomys miletus.Conclusion HFRS cases were widely distributed in most provinces of China,but cases mainly focus on certain areas and present the nature of aggregation.The risk of outbreak could not be ruled out for variety of factors.Population characteristics and seasonal fluctuation had been changing.
7.Cooling Kinetic Characteristics of Temperature Difference between Cadaver Temperature and Ambient Temperature.
Xiao-Fei DUAN ; Zi-Long GUO ; Zhen YAO ; Yin-di LIU ; Hai HU ; Zhou-Yang HU
Journal of Forensic Medicine 2022;38(5):579-583
OBJECTIVES:
To study the cooling reaction kinetic characteristics of the temperature difference between cadaver temperature and ambient temperature (hereinafter referred to as "cadaver temperature difference") according to the reaction kinetics method.
METHODS:
Thirty rabbits were randomly divided into 5 groups with 6 rabbits in each group. The rabbits were injected with 10% potassium chloride solution intravenously. After death, the rabbits were placed at 5 ℃, 10 ℃, 15 ℃, 20 ℃ and 25 ℃ environment condition, respectively, and the rectal temperature was measured every minute for 20 hours. The measured cadaver temperature was subtracted from ambient temperature, and the cadaver temperature difference data was calculated using the reaction kinetics formula. The linear regression equation was fitted for analysis, and the experimental results were applied to the temperature difference data of human body after death for verification.
RESULTS:
Under different environmental conditions, the linear coefficient determination of temperature difference -ln(C/C0) in rabbits was 0.99, showing a good linear relationship with time t. The application of human body temperature data after death was consistent with the results of animal experiments.
CONCLUSIONS
Under stable conditions, the temperature difference cooling process after death in rabbits is a first-order kinetic response. The method can also be used to study the temperature difference in human body after death.
Animals
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Humans
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Rabbits
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Body Temperature
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Temperature
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Kinetics
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Cadaver
8.Analysis of hemostatic effect of intra-articular injection of tranexamic acid after minimally invasive unicompartmental knee arthroplasty.
Xiao-Feng WU ; Zi-Fei YIN ; Bin-Feng SUN ; Fan DONG ; Ping-Kang QIAN ; Jing-Bo ZHANG ; Feng XU
China Journal of Orthopaedics and Traumatology 2020;33(11):1068-1071
OBJECTIVE:
To investigate the effect of intra-articular injection of tranexamic acid on blood loss and blood transfusion rate after minimally invasive unicompartmental knee arthroplasty.
METHODS:
From January 2015 to September 2017, 90 patients underwent minimally invasive unicompartmental knee arthroplasty were divided into tranexamic acid group and control group, 45 cases in each group. In the tranexamic acid group, there were 22 males and 23 females, aged 62 to 69 (66.1±2.4) years;in the control group, 20 males and 25 females, aged 63 to 71(68.5±5.2) years. The amount of bleeding in the drainage ball at 48 hours after operation was recorded, and the blood transfusion rate and hematocrit level duringthe perioperative period were recorded. The factors influencing perioperative blood loss included gender, age and body mass index (BMI).
RESULTS:
All patients were followed up for 12.5 to 28.3 (22.8±7.9) months. During the follow-up, the wounds of the two groups healed well, and no deep vein thrombosis and pulmonary embolism occurred. There was no significant difference in postoperative blood loss between the tranexamic acid group and the control group. The postoperative bleeding volume in the tranexamic acid group was (110.0±52.1) ml, and that in the control group was (123.0±64.5) ml (P=0.39). There was no blood transfusion in the two groups.
CONCLUSION
Intra articular injection of tranexamic acid can not significantly reduce the postoperative blood loss in patients with minimally invasive unicompartment.
Aged
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Antifibrinolytic Agents/therapeutic use*
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Arthroplasty, Replacement, Knee/adverse effects*
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Blood Loss, Surgical/prevention & control*
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Female
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Hemostatics
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Humans
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Injections, Intra-Articular
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Male
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Middle Aged
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Postoperative Hemorrhage
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Tranexamic Acid
9.Mycoplasma contamination-mediated attenuation of plasmid DNA transfection efficiency is augmented via L-arginine deprivation in HEK-293 cells.
Zi-Fei YIN ; Ya-Ni ZHANG ; Shu-Fang LIANG ; Sha-Sha ZHAO ; Juan DU ; Bin-Bin CHENG
Journal of Zhejiang University. Science. B 2019;20(12):1021-1026
Mycoplasma infection is the most prevalent contamination in cell culture. Analysis of cell culture in laboratories from different countries shows that mycoplasma contamination ranges from 15% to 80% and, in some cases, even reaches 100% (Chernov et al., 2014). Whilst mycoplasma infection is not visible to the naked eye in cell culture, the consequences of mycoplasma contamination have been shown to induce a number of cellular changes, for example, increased resistance to chemotherapeutic drugs. Therefore, any results obtained from tissue culture studies, in the presence of mycoplasma contamination, potentially render the data invalid (Kim et al., 2015; Gedye et al., 2016). As such, mycoplasmas are not harmless bystanders and cannot be ignored in in vitro studies.
Arginine/pharmacology*
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HEK293 Cells
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Humans
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Mycoplasma/isolation & purification*
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Plasmids
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Transfection
10.Antero-medial incision of knee joint for the treatment of intercondylar fracture of femur.
Zi-Fei YIN ; Bin-Feng SUN ; Xiao-Hai YANG ; Qing WANG ; Ping-Kang QIAN ; Xiao-Feng WU ; Feng XU
China Journal of Orthopaedics and Traumatology 2017;30(12):1147-1150
OBJECTIVETo explore the clinical effect of antero-medial incision of knee joint in treating intercondylar fracture of femur.
METHODSFrom September 2012 to March 2015, 24 patients with intercondylar fracture of femur were selected, including 17 males and 7 females, aged from 20 to 65 years old with an average of(38.3±9.5) years old. Among them, 12 cases were caused by traffic accident, 8 cases were caused by falling injury and 4 cases were caused by falling down. All patients were closed fractures. The time from injury to hospital was from 30 min to 8 h with an average of(2.2±0.3) h. According to AO classification, 4 cases were type B1, 3 type B2, 2 type B3, 5 type C1, 6 type C2 and 4 type C3. All patients were treated with antero-medial incision of knee joint. Operative time, blood loss and postoperative complications were observed and recovery of keen function was evaluated by Kolmert scoring.
RESULTSAll patients were followed-up from 6 to 12 months with average of (9.0±1.7) months. Operative time ranged from 50 to 90 min with an average of (70.0±8.2) min; blood loss ranged from 90 to 400 ml with an average of (180±36) ml; negative pressure flow was from 30 to 90 ml, with an average of (50.0±7.1) ml. All fracture were healed at stage I without loosening of internal fixator, fracture nonunion, and deep vein thrombosis. According to Kolmert scoring, 16 patients got excellent result, 5 patients good and 3 fair.
CONCLUSIONSAntero-medial incision of knee joint in treating intercondylar fracture of femur, which has advantages of good fracture reduction, less injury of soft tissue and simple operation, could obtain good clinical results.