1.Influence of repeated infiltrating firing on the micro-structure of In-Ceram alumina substrate
Bing LIU ; Zhongyi WANG ; Xunke LI
Journal of Practical Stomatology 2001;0(03):-
Objective: To investigate the influence of repeated infiltrating on the microstucture of In-Ceram alumina substrate. Methods:6 disks of aluminum oxide with the height of 3 mm and diameter of 12 mm were perpared and infiltrated with infiltrating glass for 0~5 times for each disk respectively.The fractured surfaces of the samples were observed by scanning elctron microscope. Results:After sintering,a net -shaped porous coping of alumina was formed. The glass infiltration resulted in a dense ceramic mass. The porous coping matrix was infiltrated with low-viscosity glass in void.3-time-infiltration resulted in the best results. Conclusion: With repeated infiltrating firing,the micro-stucture of In-Ceram alumina substrate may become a dense mass.
2.Observation of Antibacterial Activity of 156 Chinese Medicinal Herbs Against Ureaplasma Urealyticum in Vitro
Zhongyi LIU ; Guowei ZHANG ; Yunzhi HE ;
Chinese Journal of Dermatology 1994;0(05):-
In order to study the antibacterial activity of Chinese medicinal herbs to Ureaplasma ure- alyticum(Uu),we examined the inhibitory effect of 156 Chinese medicinal herbs to 14 standard strains of Uu by microdilution method in vitro.The results showed that Uu had a higher sensitivity to Cortex phellodendri,Radix angelicae dahuricae,Fructus kochiae,Radix et rhizoma rhei(MIC_(90)≤7.81mg of dried medicinal herbs/ml);a moderate sensitivity to Radix glycyrrrhizae,Radix isatidis,Rhizoma cop- tidis,Herba andrographitis,Herba houttuyniae(15.63≤MIC_(90)≤62.5);a lower sensitivity to Cortex meliae,Herba leonuri(62.5250).It is our opinion that Chinese medicinal herbs are of momentous signfi- cance in the treatment of Uu infection.
3.Clinical Observation of Possibility of GVHD in Patients Treated by Transfer of Allo-LAK Cells
Tao WAN ; Jiangqiu LIU ; Zhongyi LI
Chinese Journal of Cancer Biotherapy 1995;0(03):-
Perepherial blood lymphocytes from normal donors were isolated by Haemonetice V50 Ampheresis System, and incubated in RPMI 1640 contained 1000U/ml rIL-2 and 10%AB serum at 37癈, 5%CO2. Five days later, these cells were harvested and tested their LAK activity. Then 10 patients with malignant metastases were treated by transfer of allo-LAK cells. After 2 and 6 months, the PEL from patients were seperated for the test of response to IL-2, proliferation to ConA and production of IL-2. The result showed that no significantly reducing of these value after patients being treated by Allo-LAK cells. Combined with clinical observation and pathological biopsy, it was concluded that GVHD couldn't be caused by transfer 6f allogenic LAK cells.
4.Molecule Epidemiologic Survey of Drug-risistance Bacteria With ESBLs in Children's Hospital
Lan LIU ; Changlin LIU ; Guanxin LIU ; Zhongyi LU ; Manzi GONG
China Pharmacy 2001;12(2):99-100
OBJECTIVE:Analyzing the epidemic of drug risistance bacteria with extend spectrum β-lactamase(ESBLs)in children's wards to cut off the transmitting pathway and prevent the outbreak of nosocomial infections in time.METHODS:Samples,including sputum,umbilical secretion,pus,pharyngeal swab,were collected from in-hospital child patients in Departments of Newborn,Respiratory Tract Diseases,Cardiology,Nephrology,Hematology,Pediatric Surgery and ICU,then bacterial cultures and drug susceptibility test were carried out.54 strains of ESBLs E.coli and Klebsiella pneumoniae were isolated and their plasmid profiles were analysed by agarose electrophoresis.RESULTS:The percentages of ESBLs in the above-mentioned departments were 46.3,12.9,5.6,12.9,5.6,11.1,5.6 respectively.In analysis,three types of profiles were found and strains with four types of the same profile concentrated in the Newborn Department.The others were dispersed.CONCLUSION:Nosocomial infections possibly occured in the Newborn Department to some extent.
5.Antidepressant effect and mechanism of Gross saponins of Tribulus terrestris
Wei ZHANG ; Zhongyi YU ; Taizhong MEI ; Kaili HU ; Mei LIU
Chinese Pharmacological Bulletin 2017;33(3):343-348
Aim Tostudytheantidepressanteffectand mechanism of Gross saponins of Tribulus terrestris. Methods Themodelofdepressionwasestablishedby unpredictable chronic mild stress(UCMS),then open filed test (OFT)and tail suspension test (TST)were used to evaluate the behavioral changes.LC-MS/MS method was employed to measure blood neurotransmit-ters.mRNA expressions of IDO,IL-10 and IL-1βwere detected by quantitative PCR method.Hippocampus protein expression was detected by Western blot.Re-sults Comparedwithcontrolgroup,modelgroup's total distance,number of standing and tail suspension fixed time increased significantly (P <0. 05 ),Neuro-transmitter level of 5-HT in the blood was significantly decreased(P<0. 05 ).mRNA expression of IDO and IL-1βwas increased in hippocampus.Protein expres-sion of IDO was significantly increased in hippocampus (P <0. 05 ).Compared with model group,the treat-ment group was significantly decreased in total distance,number of standing and tail suspension fixedtime(P<0. 05).Neurotransmitter level of 5-HT in the blood and mRNA expression of IL-10 in hippocampus were significantly increased after treatment (P <0. 05 ).mRNA and protein expression of IDO were ob-viously down-regulated in hippocampus (P <0. 05 ). Conclusions GrosssaponinsofTribulusterrestriscan obviously improve rat behavior and show antidepressanteffect,which can increase neurotransmitter level of 5-HT in the blood,down-regulate mRNA expression of IDO and IL-1β,and obviously increase protein expres-sion levels of IDO in hippocampus(P<0. 05 ).
6.Preparation and Characterization of Berberine Hydrochloride Ternary Complexes
Zhongyi ZHANG ; Panpan ZHANG ; Wenjie ZHANG ; Pinfeng ZHANG ; Ruixin LIU
World Science and Technology-Modernization of Traditional Chinese Medicine 2014;(10):2208-2213
The debitterizing effect of ternary complexes was appraised and characterization of ternary complexes was made by infrared spectrum (IR) and differential scanning calorimetry (DSC). The ternary complexes (β-CD/BH/WPI90) of berberine hydrochloride (BH),β-cyclodextrin)β-CD (and whey protein isolate (WPI90) were prepared with adopting coprecipitation preparation. The results showed that the ternary complexesβ-CD/BH/WPI90 can sig-nificantly reduced the bitterness of BH. The content of BH in the ternary complexes was 3.20%. It was concluded that the ternary complexesβ-CD/BH/WPI90 had significant effect in reducing the bitterness of BH. IR and DSC of the ternary complexesβ-CD/BH/WPI90 were different from the simple physical mixture.
7.Effect of alpha-melanocyte in rat models of renal ischemia-reperfusion injury
Yan JIANG ; Zhongyi ZHANG ; Yan XU ; Xuemei LIU
Chinese Journal of Tissue Engineering Research 2015;(27):4405-4411
BACKGROUND: Kidney ischemia-reperfusion injury often combines with acute kidney and lung injury. The expression of cutin cel growth factor receptor (KGFR) and alpha sodiumchannel protein (α-ENaC) in kidney and lung after ischemia-reperfusion injury and the protective effect of α-melanocyte require further observation and research. OBJECTIVE:To explore the therapeutic effect of α-melanocyte on the expressions of KGFR and α-ENaC in rat models of ischemia-reperfusion injury. METHODS:A total of 30 healthy male Sprague-Dawley rats were randomly divided into control group, ischemia-reperfusion group and α-MSH group. Models of renal ischemia-reperfusion injury were established by 30-minute ligation of renal artery in the ischemia-reperfusion and α-melanocyte groups. Rats in the control group were only used to expose the renal artery, no ligation. Rats in the α-melanocyte group were intraperitonealy injected with α-melanocyte (0.25 mg/kg) at 30 minutes before model establishment. Rats in the ischemia-reperfusion group were injected with 4 mL of physiological saline. RESULTS AND CONCLUSION: Compared with control group, water content of kidney and lung increased significantly in rats of ischemia-reperfusion group and a-MSH group, while the levels of KGFR and α-ENaC of kidney and lung in rats were lower (P < 0.05). Compared with the ischemia-reperfusion group, water content of kidney and lung in rats of a-MSH group decreased significantly, while the levels of KGFR and α-ENaC of kidney and lung increased gradualy (P < 0.05). Moreover, edema was significantly lessened in the rat kidney and lung. Results confirmed that after renal ischemia-reperfusion injury, KGFR and α-ENaC expression was consistent to the kidney and lung injury. α-MSH could increase the protein and mRNA expression of KGFR and α-ENaC in kidney and lung of rats, reduce the kidney and lung injury, and exert a certain protective effect.
8.Expression and Purification of Recombinant Human Endostatin
Zhongyi LI ; Junyuan WANG ; Jiangqiu LIU ; Linsheng CHEN ; Ning LI
Chinese Journal of Cancer Biotherapy 1995;0(02):-
Objective: To highly express rh-Endostatin from Pichia pastoris and purify it to homogeneity. Methods: Constructed Pichia pastoris X33/pLW202 was amplified and inoculated to ferment media. The supernatant of the strain was collected after induction. Through ultrafiltration, affinity and gel chromatography, rh-Endostatin with high purication was obtained. Results: 60mg/L rh-Endostatin was obstained from supernatant. HPLC showed its purity was above 98%. Conclusion: High level expression of secreted rh-Endostatin has been successfully achieved in Pichia pastoris expression system.
9.An experimental study on inhibiting growth and metastasis of mouse melanoma by engineering endostatin
Jiangqiu LIU ; Zhongyi LI ; Linsheng CHEN ; Yihong SUN ; Lu XU ; Junyuan WANG ; Wanxing LIU ; Jielai XIA
Journal of Cellular and Molecular Immunology 2001;17(1):63-64
Aim To explore inhibitory effects and mechanism of engineering endostatin on growth and metastasis of melanoma cells in mice. Methods Melanoma cells(2× 106/mouse)were inoculated sabcutaneously to C57BL/6 mice. After tumorigenesis,endostatin(8mg/kg.d)was administrated to tumor-bearing mice,once a day ,twenty-one in all.Dietetic state and weight change of the tumor-bearing mice were observed and tumorous sige was measured during administration of endostatin. On 26thday,the tumor-bearing mice were sacrificed,subcutaneously tumorous weight was weighed and brain,lung ,liver,spleen and kidney were excised and sections were made to supply the pathological examination. Results Area under curve in the endostatin-treated group was obviously less than that in tamor control group(P∨ 0.01). Pathological study revealed that lavge areal necrosis arose in tumor and newborn cappillaries around the tumor disapeared. Conclusion Endostatin possosses strongly inhibitory effects on growth and metastasis of mouse melanoma and formation of newborn capillaries around tumor.
10.Therapeutic efficacy of peripheral T cell lymphoma patients treated with first-line intensive chemotherapy followed by autolo-gous stem cell transplantation
Yuan YAO ; Pingyong YI ; Xiyu LIU ; Fang ZHOU ; Zhongyi SUN ; Zhou OUYANG ; Junqiao HE ; Lijun HUANG
Journal of Chinese Physician 2014;(2):227-230
Objective To investigate the outcomes of unselected peripheral T cell lymphoma (PTCL) patients treated with in-tensive first-line chemotherapy with high-dose therapy followed by autologous stem cell transplantation (ASCT).Methods Here a nonrandom study was reported for 23 PTCL patients treated with first-line intensive chemotherapy followed by autologous stem cell trans-plantation and 23 PTCL patients treated with conventional chemotherapy during January in 2000 to 2011 .All patients had received E-CHOP for 6~8 cycles, and autologous stem cell transplantation group was administrated with intensive chemotherapy followed by ASCT after complete remission or partial remission .Results There was no statistically significant difference in short-term therapeutic effect between two groups( P >0.05), but the 5-year overall survival(OS) of autologous stem cell transplantation group( 58%) was higher than conventional chemotherapy group , as well as 5-year disease-free survival time (DFS) (45%in autologous stem cell transplanta-tion group, and 21%in conventional chemotherapy group ) with both statistical significance ( P <0.05).Only the incidence of Ⅳ° myelosuppression in autologous stem cell transplantation group ( 100%) was higher than that in conventional chemotherapy group ( 13%) ( P <0.01 ) .Conclusions First-line intensive chemotherapy followed by autologous stem cell transplantation for peripheral T cell lymphoma was quietly safe utility , it was better than conventional chemotherapy which would be considered as first -line method.