4.Caspase-8 dependent osteosarcoma cell apoptosis induced by proteasome inhibitor MG132
Xiaobo YAN ; Xiang GAO ; Jie FENG ; Zhongli SHI ; Disheng YANG
Chinese Journal of Pathophysiology 1986;0(02):-
AIM: To investigate the effects of proteasome inhibitor Z-LLL-CHO(MG132) on human osteosarcoma cell line MG-63 and its possibly mechanism.METHODS: After treated with different concentration of MG132,the morphological change,ultrastructral morphology,cell viability,cell apoptosis,gene transcription and protein expression in MG-63 cells were accessed by fluorescence microscope,electron microscope,MTT assay,agrose gel electrophoresis,FCM,RT-PCR and Western blotting.RESULTS: Proteasome inhibitor MG132 was an effective inducer of apoptosis in human osteosarcoma MG-63 cells.Not only apoptotic changes,but also cell arrest at G2-M-phase,the accumulation of p27kip1,the accumulation of activated caspase-8 and increased ratio of Bax∶Bcl-2 were observed.However,to normal human diploid fibroblast cells,MG132 did not show apoptosis-inducing effect.CONCLUSION: Apoptosis induced by MG132 may be caspase-8,p27kip1and bcl-2-related.
5.Therapeutic Effect of High Frequency Oscillatory Ventilation on Premature Infants with Respiratory Distress Syndrome
yan, WANG ; xiang-yong, KONG ; zhi-chun, FENG
Journal of Applied Clinical Pediatrics 2006;0(14):-
Objective To evaluate the effect of the high frequency oscillatory ventilation(HFOV) on the treatment of premature neonates with respiratory distress syndrome(RDS).Methods Seventy premature infants with RDS were randomly grouped as HFOV group(n=33) and conventional mandatory ventilation group(CMV group,n=37),based on their fetal age,weight,age,and their clinical condition from Jan.to Sep.in 2009.The blood gas analysis was detected and compared between the 2 groups.Results In HFOV group,the inhaled oxygen concentration,pa(CO2) decreased after treatment for 6 h,which were significantly lower than those at the beginning of the therapy(Pa
6.Antibody to Ro-52 in patients with autoimmune liver disease
Dantong ZHAO ; Huiping YAN ; Yufen TAN ; Yan LIU ; Yan ZHAO ; Xia FENG ; Daijun XIANG
Chinese Journal of Microbiology and Immunology 2009;29(7):656-659
Objective To investigate the significance of antibody to Ro-52 in patients with autoim-mune liver disease(AILD). Methods One hundred and fifteen patients with abnormal liver functions, who had anti-Ro-52 detection by immunological blotting, were reviewed retrospectively. According to types of AILD, the clinical features were compared between patients with and without anti-Ro-52, respectively, κ test of concordance was used to provide a chance-corrected valve for immune-serological results. Results The rates of anti-Ro-52 in autoimmune hepatitis( AIH), primary sclerosing cholangitis(PBC) and AIH/PBC o-verlap syndrome groups were 32.43%, 24.56% and 33.33%, respectively, there were no significant differ-enees among three groups ( x2 = 0. 949, P >0. 05). The rate of anti-soluble hver antigen/liver-pancreas ( an-ti-SLA/LP) in AIH patients with anti-Ro-52 (58.33%) was higher than AIH patients without anti-Ro-52 ( 16.00% ,P < 0.05 ). The rate of anti-SLA/LP in AIH/PBC overlap syndrome patients with anti-Ro-52 (85.71%) was also higher than that of control group (28.57% ,P <0.05). Anti-Ro-52 and anti-SLA/LP had concordance according to κ test( κ >0.40, P <0.05). The average level of IgG in AIH/PBC overlap syndrome patients with anti-Ro-52 was higher than patients without anti-Ro-52 ( t = 2. 508, P < 0.05 ). Conclusion The rates of anti-Ro-52 in AIH, PBC and AIH/PBC overlap syndrome were of no significant differences. Anti-Ro-52 may have correlation with anti-SLA/LP. AIH/PBC overlap syndrome patients with anti-Ro-52 shewed higher IgG level than patients without anti-Ro-52.
7.Processing Technology Research of Fermentation and Purification of SUMO Protease UlP1
Xiu-Ping FENG ; Bai-Rong DU ; Dong-Mei YAN ; Xiang-Feng ZHAO ; Xun ZHU ;
China Biotechnology 2006;0(02):-
Nowadays,small peptides are always expressed in the form of fusion protein.The expression product contains many superfluous amino acids which can affect the biological functions of small peptides even expressed by GST fusion protein expression system.SUMO protease can cut SUMO fusion protein expressed by fusion expression system without any amino acid residues left on target protein thus become a hot topic in this field.Recombinant His-UlP1/pET3c/BL21(DE3)engineering strain was constructed by genetic engineering technology and the expression conditions were optimized in shake flaks.The process of high density fermentation was explored and different purification conditions were detected by chromatography.The results showed that SUMO protease could be expressed well after inducing the engineering strain by IPTG of 1.0mmol/L at 30℃ for 6 hours.The expression level of the strain in fermentation pots could reach 24.3% analyzed by SDS-PAGE.The purity of SUMO protease was more than 98% after further purification by cation exchange chromatography.The yield was 355mg SUMO protease per liter fermentation liquid.Western blot analysis demonstrated that there were immune reactions between IlP1 and 6?His antibodies,so it has established a good foundation for large-scale industralazation in the future.
8.VSMCs Proliferation and Mechanism of Signal Transduction by Angiotensin Ⅱ Type 1 Receptor Autoantibodies Mediated from Hypertensive Patients
Yan-Xiang SUN ; Yu-Hua LIAO ; Yu-Miao WEI ; Hai-Yan ZHANG ; Min WANG ; Feng ZHU ;
Chinese Journal of Hypertension 2006;0(09):-
Objective The autoantibodies against angiotensin Ⅱ type 1 receptor(AT_1 RAb)have been dis- covered in the patients with malignant hypertensive and preeclampsia,this autoantiboies(AT_1-AA)have an ago- nist-like activity effect similar to angiotensin Ⅱ(Ang Ⅱ).This study aimed at investigation the effect of Ang Ⅱ agonist-like activity by AT_1-AA on VSMCs proliferation was obtained from essential hypertensive patients. Methods VSMCs were cultured from aorta of WKY rats.The hypertensive patients" serum was purified by am- monium sulfate precipitation and affinity chromatography.The effect on VSMC proliferation this autoantilody was determined by BrdU incorporation.Total protein and the expression of phosphorylation JAK-STAT were assessed by Western blotting.Results AT_1RAb caused a significant increase in BrdU incorporation similar to Ang Ⅱ during 0-24 h reaching peak value at 12 h.The A value of in 450 nm was higher in AT_1RAb group (0.236?0.012)than AG490+AT_1RAb group(0.176?0.009),Losartan+AT_1RAb groups(0.119?0.006) and Serum Free group(0.127?0.006)(P
9.Exploration on interaction of Chinese and Western drugs.
Xiang LONG ; Hao LI ; Yan-Feng ZHAN
Chinese Journal of Integrated Traditional and Western Medicine 2009;29(5):457-460
To study the interaction of traditional Chinese medicines and Western drugs in the interest of the interaction of Chinese and Western drugs viewing from their own characteristics, pharmacokinetics and pharmacodynamics to provide a scientific basis for rational clinical utilization of drugs. Pharmacological mutual coordination and/or restriction existed between the two kinds of drugs. When they were used in combination, it would increase or decrease adverse reactions, or even toxic reaction. When traditional Chinese drugs were used in combined with Western drugs, it is ought to know the nature and pharmacological effect of various chemical constituents in the compound for the best combination, try to avoid adverse drug interactions for the sake of reaching the goal of high effectiveness, safety and harmlessness.
Drug Incompatibility
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Drug Interactions
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Drugs, Chinese Herbal
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Medicine, Chinese Traditional
10.Chemical constituents of Hyptis rhomboidea and their antifungal activity.
Lu TANG ; Xi-Feng LI ; Sheng-Xiang YANG ; Yan QIU ; Ke YUAN
China Journal of Chinese Materia Medica 2014;39(12):2284-2288
The present work is to investigate the chemical constitutions of Hyptis rhomboidea and their antifungal activities. The compounds were isolated by Toyopearl HW-40, Sephadex LH-20, MCI-Gel CHP-20, RP-18, PTLC and silica column chromatographic methods and subjected to evaluate some monomers antifungal activity of eight kinds of plant pathogenic bacteria. Eleven compounds were isolated and identified as ethyl caffeate (1), ursolic acid (2), oleanolic acid (3), vanillactic acid (4), methyl rosmarinate (5), kaempferol 3-O-alpha-L-rhamnopyranosyl-(1 --> 6) -beta-D-glucopyranoside (6), kaempferol 3-O-alpha-L-rhamnopyranosyl-(1 --> 6)-beta-D-glucopyranoside (7), ilexgenin A (8), beta-amyrin (9), kaempferol 3-O-beta-D-glucopyranoside (astrgalin, 10) and cholest-5-ene-3beta, 4beta-diol (11). Compound 1 showed the strongest inhibitory effect on Sclerotinia sclerotiorum with the MIC 16.2 mg x L(-1), and compound 5 showed the strongest inhibitory effect on S. minor and Exserohilum turcicum with MIC 16.2, 8.1 mg x L(-1), respectively. All compounds were isolated from the H. rhomboidea for the first time, and compounds 1 and 5 showed antifungal activity.
Antifungal Agents
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chemistry
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isolation & purification
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pharmacology
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Drugs, Chinese Herbal
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chemistry
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isolation & purification
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pharmacology
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Fungi
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drug effects
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Hyptis
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chemistry
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Molecular Structure
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Spectrometry, Mass, Electrospray Ionization