1.Optimization of recombinant human endostatin refolding
Basic & Clinical Medicine 2010;30(5):492-495
Objective To optimize the conditions for enhancing the refolding of a novel recombinant human(rh)endostatin and test the biological activities of refolded endostatin.Methods The partial purified inclusion bodies of rh-endostatin were dissolved with 6 mol/L guanidine-HCl followed by combination of dilution and dialysis of the dissolved endostatin.The refolded endostatin was then purified by cation-exchange chromatography.The biological activities of purified rh-endostatin were assessed by endostatin-specific monoclonal antibody and chick embryo chorioallantoic membrane assay.Results A 46% refolding yield was achieved after optimizing the refolding conditions.The purified endostatin reacted with specific anti-endostatin monoclonal antibody and showed significant inhibition of angiogenesis in chick embryo ehorioallantoic membrane assay.Conclusion The method of highest refolding yield of human endostatin was developed.This optimized method significantly promotes the application of this novel human endostatin to preclinical and clinical studies.
2.Application and development of genetic engineering technology in biopharmaceutics
Lixi ZHAO ; Jingjing SUN ; Yongping JIANG
Basic & Clinical Medicine 2006;0(09):-
This review focus on the perspective of genetic engineering technology in biopharmaceutical field.Four general aspects of genetic engineering are further discussed in this review as following: the separation of macromolecules,PCR,gene chip,and the expression of foreign genes.The large-scale or industrialization of genetic engineering technology in biopharmaceutics is also reviewed.
3.The correlation between hepatitis B virus gene mutation at site 1896 in precore region and genotypes as well as liver function
Zuofen CHEN ; Yongping CAO ; Peixue JIANG
International Journal of Laboratory Medicine 2009;30(7):680-681,684
Objective To analyze the relationship between hepatitis B virus gene mutation at site 1896 in precore region and genotypes as well as liver function parameters. Methods The fluorescent quantitative PCR and sequencing method were applied to measuring the relevant indicators in 50 patients with chronic hepatitis B. Results There was significant difference in ALT level between hepatitis B patients with site 1896 mutation and ones with wild-type; and HBV mutation at site 1896 in precore region was unrelated to the genotypes. Conclusion HBV mutation at site 1896 in precore region may be associated with continous viral invasion invasion into hepatocytes.
4.Psychological Analysis and Nursing Intervention in Urodynamic Test
Yanbing JIANG ; Yongping MIAO ; Fengling LV ; Ruiming MA ; Rui LI
Journal of Kunming Medical University 2014;(2):155-157
Objective To investigate the influence of psychological intervention on the urodynamic test. Method The 959 patients in the urodynamic test were divided into two groups:the control group and the the test group,then we analyzed and compared the results. Results In the incidence of the abnormal abdominal pressure, the unnatural detrusor contraction and the Unnatural urethral sphincter contraction, there were statistically significant differences between two groups ( <0.05) . Conclusion It effective and necessary for urodynamic test to do psychological intervention.
5.In vitro and in vivo degradation of Mg-Nd-Zn-Zr alloy
Yongping WANG ; Yao JIANG ; Lin MAO ; Jialin NIU ; Guangyin YUAN
Chinese Journal of Tissue Engineering Research 2013;(47):8189-8195
BACKGROUND:Al oying is a convenient and effective method to alter the microstructure and control the corrosion behavior of magnesium al oy.
OBJECTIVE:To explore the in vitro and in vivo degradation of Mg-Nd-Zn-Zr al oy as a degradable medical biomaterial.
METHODS:(1) In vitro static immersion test:The immersion tests were carried out at (37.0±0.5) thermostatic bath. Six Mg-Nd-Zn-Zr al oy samples and six pure magnesium samples were immersed in the 250 mL simulated body fluid and vibrated without agitation during immersion. After 3, 7 and 30 days static immersion, the samples were taken out from the simulated body fluid. Then the in vitro corrosion properties were evaluated using scanning electron microscope and energy dispersive spectrometer analysis. (2) In vivo animal experiment:After bone tunnel was established in the left femur of adult New Zealand rabbits, the Mg-Nd-Zn-Zr al oy rods were embedded in the Mg-Nd-Zn-Zr al oy group, titanium al oy rods were embedded in the titanium al oy group, and only bone tunnel was established in the sham-operated group. At 1, 2, 4, 8 weeks after implantation, an X-ray of the implanted region was taken to determine the location and the degradation behavior℃in a of Mg-Nd-Zn-Zr al oy. At 4, 8 weeks after implantation, the corrosion product and its element composition were observed using scanning electron microscope with an energy dispersive spectroscopy system.
6.Comfort analysis of colostomy waste water using multilayer soft silicone dressings in the treatment of patients with dermatitis
Yongping YANG ; Yaohua LIU ; Lihua WANG ; Yingjuan JIANG ; Yuying WANG
Chinese Journal of Primary Medicine and Pharmacy 2016;23(7):986-989,990
Objective To explore the treatment effect and comfort of colostomy surgery with fecal water der-matitis around stoma after application of multilayer soft silicone dressings.Methods Approved by the Hospital Ethics Committee and the patients'informed consent,120 patients were divided into the hydrocolloid dressings group ( the control group) and multi-layer soft silicone dressing group (the treatment group),60 cases in each group.Before treatment,after treatment 24h and 36h,DET score,GCO score and the treatment effect were evaluated.Results After treated for 24h,the DET,GCO scores and treatment effects ( in the control group,cured in 3 cases,effective 45 cases, in the treatment group 5 patients were cured,effective in 46 cases) had no significant differences between the two groups (t=-2.624,P>0.05,t=-0.429,P>0.05,χ2 =0.519,P>0.05).After treated for 36h,the DET,GCO scores and treatment effects ( in the control group:cured in 29 cases,effective in 25 cases,in the treatment group:51 patients were cured,effective in 9 cases) had significant differences between the two groups ( t=-5.022,P<0.01,t=12.784,P<0.01,χ2 =6.316,P<0.05).Conclusion Colostomy fecal water dermatitis around stoma after application of multilayer soft silicone dressings can significantly improve the patients'comfort.
7.Analysis of clinical application of coronary artery imaging with 64-slice spiral CT
Biao JIANG ; Eryi XU ; Yongping YANG ; Ting MAO ; Haijun CHENG
Chinese Journal of Primary Medicine and Pharmacy 2010;17(22):3046-3047
Objective To explore clinical application of coronary artery imaging with 64-slice spiral CT.Methods 46 patients with coronary heart disease were undergone both coronary artery imaging with 64-slice spiral CT and coronary angiography,and the effects on coronary display respectively were compared Results Coronary display in coronary artery imaging with 64-slice spiral CT was better than that of the coronary angiography, which was a inspection pattern of noninvasive coronary display. Conclusion Coronary artery imaging with 64-slice spiral CT can accurately evaluate coronary artery stenosis, which was worth to application.
8.Evaluation of regional systolic and diastolic function of left ventricle in coronary artery disease using pulsed wave Doppler tissue imaging
Jianhong JIANG ; Jianbin GONG ; Shisen JIANG ; Hui SUN ; Lijun WANG ; Yongping PENG ; Ying ZOU ; Baojun LIU
Journal of Medical Postgraduates 2005;0(S1):-
Objective: To assess the regional systolic and diastolic function of left ventricle by pulsed wave Doppler tissue imaging ( PW-DTI) in patients with coronary artery disease ( CAD ) . Methods : Seventy-seven cases of coronary angiography were adopted for study and grouped in terms of severity of coronary arterial lesion. Peak systolic, peak early diastolic, and peak late diastolic motion velocities (Sm, Em and Am, respectively) were recorded at 6 different sites on the basal and medial segments corresponding to the anteroseptal, posteroseptal, lateral, anterior, inferior, and posterior walls of the left ventricle with PW-DTI. Results: Am in segments corresponding to normal coronary arteries (group A) was lower than in segments corresponding to slightly stenosed coronaries (group B). There was no significant difference in Sm and Em between group A and group B. Compared with group A, Sm, Em and Am were significantly decreased in segments corresponding to severely stenosed coronary arteries ( group D). Conclusion : PW-DTI could be used to evaluate quantitatively and accurately the regional mvocardial function of left ventricle in patients with CAD.
9.The effects of vitamin D deficiency on the cardiac oxidative stress in mice and the underlying mechanisms
Yi TANG ; Jing LIU ; Liang XIE ; Lijun WANG ; Qigao ZHANG ; Yongping PENG ; Jianbin GONG ; Shisen JIANG
Journal of Medical Postgraduates 2016;29(10):1050-1054
Objective Previous studies have shown that vitamin D deficiency is closely related to cardiac remodeling. How?ever, the underlying mechanisms have not been fully elucidated. Moreover, oxidative stress plays an important role on the pathologies of cardiac remodeling. The aim of this study was to explore the influence of VD deficiency on cardiac oxidative stress and the potential sig?nal pathway. Methods The male C57 mice ( 3 weeks old) were randomly divided into three groups: vitamin D deficiency ( VDD ) group ( vitamin D deficiency feed for 10 weeks) , vitamin D deficiency ( VDA) group ( vitamin D sufficiency feed for 10 weeks) and VDD+calcitriol ( CAL) group ( vitamin D deficiency feed for 10 weeks and then vitamin D sufficiency feed and calcitriol treatment for 10 weeks) . Results There were significant differences between the VDD group and the VDA group in the left ventricular end?diastolic diameter and left ventricular mass index (3.82±0.125 mm vs 3.748±0.092 mm, P<0.05) (119.30±8.54 vs 97.60±3.65, P<0.05). The number of myocardial cells stained with 8?OHDG was higher in the VDD group compared with the VDA group ( 65. 4 ± 2. 3 vs 21. 8 ± 1. 6, P<0.05) whereas was lower after calcitriol supplement. Furthermore, the expression of thioredoxin interacting protein (TXNIP) was sig?nificantly up?regulated and the ratio of p?ASK?1/ASK?1, cytochrome C release, and caspase3 activation were increased in the VDD group . Conclusion VDD can lead to cardiac oxidative injury and the up?regulation of TXNIP and the activation of ASK?1 related apoptotic signal cascade may be involved in this procedure.
10.Effect of Nao-re-qing oral liquid on cAMP content in hypothalamus and CSF,and AVP content in ventral septal area of endotoxin-induced febrile rabbits
Zhiqin LIU ; Yufeng JIANG ; Xiaoli YUE ; Yongping FAN ; Wenrong WANG ; Liwei REN ; Qifu HUANG ; Yimin HU
Chinese Journal of Pathophysiology 2000;0(11):-
AIM: To explore the mechanism of Nao-re-qing oral liquid (NRQ) decreasing endotoxin (ET)-induced fever in rabbits. METHODS: (1) The ET-induced fever model was established in rabbits. Febrile response of rabbits was observed. (2) The arginine vasopressin (AVP) content in the ventral septal area (VSA),and cAMP content in hypothalarmus (HP) and CSF were determined by radioimmunoassay.RESULTS: (1) In ET group,the maximal increment in body temperature (?T) [(1.80?0.16) ℃],6 h thermal respone index (TRI_6)(11.31?0.20),the cAMP content in the HP [(1.35?0.21)nmol/g],the cAMP content in CSF [(66.69?1.82) nmol/L] and AVP content in the VSA [(30.80?9.59)ng/g ] were significantly higher than those in NRQ+ET group[?T(0.82?0.08) ℃,TRI_6(5.73?0.09),HP: cAMP(0.70?0.50)nmol/g,CSF: cAMP(56.86?1.34),AVP:(11.91?3.47)ng/g]( P