2.A STUDY ON QUANTITATIVE ALTERATION OF 5srRNA DURING THE DEVELOPMENT OF MAMMALIAN ERYTHROCYTES
Yan XU ; Xue HU ; Jin TANG ; Ruoming YANG ; Shepu XUE
Acta Anatomica Sinica 1954;0(02):-
The present study reported that 5srRNA from reticulocytes of rabbit could pass into the nucleus of mouse myeloma cells SP2/0,and in the mean time DNA synthesis and cells division were markedly suppressed. In a separate experiment, the rRNA was extracted from embryonic liver and erythrocytes of rabbit or rat and analysed by agarose electrophoresis method. The result indicated that the amount of 5srRNA in various period of the development of erythrocyte is changed along with denucleation process. Thus it is likely that 5srRNA of mammalian erythrocyte plays a role in reversing malignant phenotype of tumor cells and promoting denucleation of mammalian erythrocyte through inhibiting DNA synthesis.
3.Value of urinary albumin/creatinine ratio for assessing coronary heart disease complicating thyroid dysfunction
Bingrong XUE ; Peng XU ; Jie TANG ; Li XUE ; Yuwei YANG
International Journal of Laboratory Medicine 2017;38(4):485-487
Objective To explore the value of urinary albumin/creatinine ratio (ACR) in coronary heart disease(CHD) compli-cating thyroid dysfunction and its correlation with the various detection indicators of thyroid function.Methods The results of uri-nary ACR and thyroid function detection in 863 patients with CHD in our hospital from November 2015 to August 2016 were col-lected.According to the standards of American National Kidney Foundation (NKF) and Food and Drug Administration(FDA) ,863 CHD patients were divided into the group A (ACR≤10.0 mg/g · Cr) ,B(10.0 mg/g · Cr< ACR≤30.0 mg/g · Cr) ,C (30.0 mg/g · Cr
4.Effect of insulin on the synthesis and secretion of adrenomedullin in rat aortas in vitro
Xue-wei XU ; Chao-shu TANG ; Ye YANG ; Xiaoying LI
Chinese Journal of Rehabilitation Theory and Practice 2004;10(6):350-350
ObjectiveTo investigate the effect of glucose and insulin on the synthesis and secretion of adrenomedullin (ADM) by rat aortas in vitro.MethodsThe rat aortas were cut into pieces and divided into several equal groups. All the groups were incubated in K-H buffers including different levels of glucose,insulin and insulin+glucose for 3 hours,the group incubated in K-H buffer without glucose was used as control. To determine ADM in K-H buffers and tissues using RIA method.ResultsADM levels in insulin groups (100.0 μIU/ml,200.0 μIU/ml) and insulin+glucose groups were higher than that in control (P<0.05),the ADM levels in glucose groups and low level insulin group (20.0 μIU/ml) were not significantly difference compared with the control. ConclusionHigh levels of insulin can stimulate the synthesis and secretion of ADM.
6.The analysis of pulmonary infect flora distribution and risk factors of stroke patients with tracheotomy in intensive care unit
Qing YANG ; Wei XU ; Kankai TANG ; Zhidong CHEN ; Zhongjie XUE
Journal of Chinese Physician 2016;18(3):414-417
Objective To investigate pulmonary infect flora distribution characteristics of stroke patients with tracheotomy in Intensive care unit (ICU) and analyze the risk factors.Methods A total of 792 cases of ICU stroke patients was selected,including 426 cases of tracheotomy patients,and 366 cases of non-tracheotomy patients.The incidence of lung infections was compared.Bacteriological examination was used for tracheotomy bacteriological studies for lung infected stroke patients with tracheotomy.Bacteria infection's characteristics was observed.The risk factors were analyzed.Results (1) The tracheotomy patient 's lung infection rate was 23.00%,higher than 9.56% of the non-tracheotomy patients,the difference was statistically significant (X2 =19.125,P <0.05);(2) For lung infection-occurred patients with tracheotomy of ICU,gram-negative bacteria infection rate was 63.97%,significantly higher than 19.85% of gram-positive bacteria and 16.18% of fungi,the difference was statistically significant (x2 =18.255,17.042,P < 0.01);(3) Lung infection rate of ICU stroke tracheotomy patients with unconscious,dysphagia,hospitalization time > 14 d,blood glucose levels ≥≥7.8 mmol/L,and based diseases was significantly higher than that of patients with conscious,non-dysphagia,hospitalization time ≤<14 d,blood sugar level <7.8 mmol/L,and no based diseases (P < 0.05);(4) Consciousness,dysphagia,hospitalization,blood sugar levels,and the underlying disease were the independent risk factors of lung infection in ICU stroke tracheotomy patients (OR1 =11.528,OR2 =8.046,OR3 =15.174,OR4 =7.795,ORs =10.784,P <0.05).Conclusions Gram-negative bacteria is the main reason for pulmonary infections in ICU stroke tracheotomypatients patients with stroke.State of consciousness,invasive treatment,hospitalization,blood sugar levels,and the underlying disease are the independent risk factors.
7.Research progress on application of gold magnetic nanocomposite in biomedicine.
Yang XUE ; Lingyun ZHAO ; Jingtian TANG ; Cuiping YAO
Journal of Biomedical Engineering 2014;31(2):462-466
This paper provides a brief overview of the current research activities which focused on the bio-application of gold magnetic nanocomposite particles. By combining the magnetic characteristics of the iron oxide core with the unique features of nano-gold particles such as targeting by surface modification and optical properties, such composite nanoparticles have a wide range of applications in cancer hyperthermia, CT and MRI imaging, bio-separation, bio sensors, gene diagnosis, drug targeting and many other biomedical fields.
Diagnostic Imaging
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Drug Delivery Systems
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Ferric Compounds
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chemistry
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Gold
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chemistry
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Humans
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Magnetics
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Nanocomposites
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chemistry
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Nanoparticles
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chemistry
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Neoplasms
8.Contents Determination of Luteoloside,Quercetin and Hyperoside in the Extract of Lonicera japonica by HPCE
Xue ZENG ; Yuanjuan YANG ; Zhu CHEN ; Qian TANG ; Lei SHI
China Pharmacy 2017;28(18):2543-2545
OBJECTIVE:To establish a method for contents determination of luteoloside,quercetin and hyperoside in Lonicera japonica. METHODS:HPCE was performed silica capillary column with detection wavelength of 360 nm and separation voltage of 20 kV,electrokinetic sampling,sampling voltage of 15 kV,sampling time of 5 s,operation temperature of 25 ℃.The buffer was consisted of 60 mmol/L sodium tetraborate-50 mmol/L natrium carbonicum-50 mmol/L hydroxypropyl-β-cyclodextrin(pH 9.2). RE-SULTS:The linear ranges of luteoloside,quercetin and hyperoside were 0.06-0.56mg/mL (r=0.9881),0.08-0.56 mg/mL (r=0.9892),0.06-0.49 mg/mL(r=0.9796),respectively. RSDs of precision,stability and reproducibility tests were all lower than 2.0%. The recoveries were 96.12%-99.77%(RSD=1.29%,n=6),95.90%-98.35%(RSD=0.89%,n=6),94.07%-97.45%(RSD=1.33%,n=6),respectively. CONCLUSIONS:The method is simple,accurate,stable and reproducible,and can be used for simultaneous determination of luteoloside,quercetin and hyperoside in L. japonica.
9.Preparation of fusion protein between ZZ affinity peptide and alkaline phosphatase and its primary application
Rumeng BAO ; Shuangjia ZHAO ; Min XUE ; Hongming YANG ; Jinbao TANG
Chinese Journal of Immunology 2015;(9):1214-1216,1220
Objective:To construct and express the fusion protein between ZZ affinity peptide and alkaline phosphatase and examine its biological activities.Methods:The alkaline phosphatase gene was cloned into pEZZ 18 vector containing ZZ peptide gene resulted in the pEZZ-AP recombinant vector.Then the vector was transformed and expressed in E.coli DH5α.And HisTrap affinity chromatography was employed to separate and purify the target protein.After analyzed by Western blot , ZZ-AP fusion protein was applied to immunocytochemistry as an alterative second antibody.Results:The result of SDS-PAGE showed that the fusion protein with a relative molecular weight was consistent with the theoretical values (62 kD).The fusion protein has rabbit IgG-binding ability and en-zymatic activity of alkaline phosphatase ,those were validated in Western blot;and it produced a good signal that was comparable in its staining pattern to that generated with goat anti-rabbit IgG-AP in immunocytochemistry.Conclusion: The ZZ-AP fusion protein was constructed successfully ,it has rabbit IgG-binding ability and enzymatic activity of alkaline phosphatase.We anticipate that the ZZ-AP fusion protein has a potential application in immunoassay field.
10.The effects of CD4~+ CD25~+ regulatory T cells on the airway inflammation of asthmatic rats
Keying XUE ; Chengguo WANG ; Li CHENG ; Zhongwei YANG ; Zhengyan WANG ; Wei LI ; Ming SHI ; Youyong TANG
Journal of Chinese Physician 2009;11(12):1613-1616
Objective To observe the effects of CD4~+ CD25~+ regulatory T cells ( CD4~+ CD25~+ Treg) on the airway inflammation of asthmatic rats. Methods CD4~+ CD25~+ Treg of OVA- immune tolerance rats were transferred to asthmatic rats. Then bronchoalveolar lavage fluid (BALF) was collected, and cytology study was conducted. The IL-4, IL-5, IFN-γ and OVA-specific serum IgE level in BALF were determined by ELISA. The lung tissue was obtained, and histologieal analysis was done through H. E. Results Total cells number, the percentage of lymphocytes and neutrophils in BALF, the IL-4 and IL-5 BALF levels and the OVA-specific serum IgE level of adoptive transfer group were decreased ( P < 0.05 ) , and the percentage of eosinophils ( Eos) was significantly lower than that of asthma group ( P < 0.01) , while its BALF IFN-γ level was higher than that of asthma group( P <0. 05). Compared with that of asthma group, peribronchiole inflammatory of treated group was alleviated. Conclusion CD4 ~+ CD25~+ Treg of OVA- immune tolerance rats transferred to asthmatic rats can significantly alleviate the airway inflammation of asthmatic rats.