The structural protein VP6 of rotavirus form the middle layer of the triple-layered viral capsid, playing a key role in the organization of the virion. The gene of structural protein 6 of rotavirus strain TB-Chen isolated from a clinic sample was amplified using PCR from the reverse transcription product of RV genome RNA, using pET as expression vector, a recombinant plasmid pET-VP6 containing coding sequence of VP6 protein was constructed. The results showed that the VP6 was highly efficiently expressed in E. coli BL21(DE3) cells which were transformed with the recombinant plasmid pET-VP6.The expressed VP6 protein possessed 27.4% of total cells protein, with an approximately 45kDa of molecular weight, and could be recognized by guinea pig anti-SA11 antibody on Western blot. The results obtained provide important basis for further study on structure and function of the VP6 protein.

(3S)-Linalool synthase (LIS) is a key enzyme involved in the monoterpene biosynthetic pathway. Based on our previous transcriptome study, the expression level of LIS gene was exceedingly related to glycyrrhizic acid (GA) biosynthesis. Therefore, we used hairy root culturing to further investigate the effect of LIS on the GA biosynthesis. A LIS gene (GenBank accession number: MZ169552) was cloned from Glycyrrhiza uralensis. The plant binary overexpression vector pCA-LIS was constructed by gene fusion. G. uralensis hairy roots overexpressing LIS were induced by the Agrobacterium rhizogenes ATCC15834. The expression levels of LIS were analyzed by real-time quantitative PCR (RT-qPCR) and the contents of GA in hairy root lines were determined by UPLC. It was found that in the hairy root lines overexpressing LIS, the expression levels of LIS were significantly higher than that in the wild type, while the contents of GA were remarkably lower than those in the wild type and negative control. These findings indicate that the expression level of LIS is negatively correlated with the accumulation of GA. In this study, LIS was cloned from G. uralensis for the first time and the negative regulatory effect of LIS on GA biosynthesis was confirmed by reverse genetics. This work provides support for further improvement of the molecular regulatory network of GA biosynthesis in G. uralensis.

BackgroundRetinal pigment epithelial(RPE) cells can secrete platelet-derived growth factor (PDGF) and PDGF receptor(PDGFR).Studies have shown that PDGF plays a key role in the formation of proliferative vitreous retinopathy(PVR). ObjectiveThis study was to investigate the proliferation and apoptosis changes of RPE after blockage of the PDGFR-α expression by antisense oligonucleotide ( ASODN ) in vitro. Methods Human RPE cells strain was cultured in low glucose DMEM with 10％ fetal bovine serum.Logarithmic phase cells were collected and incubated in 96-well plate at the density of 5 × 105 cells/hole.PDGFR-α ASODN was transfected into RPE cells at different concentrations for 48 hours.The cells of the blank control group were regularly cultured without any transfection.The changes of PDGFR-α expression were detected by reverse transcription-polymerase chain reaction(RT-PCR),and the proliferation of RPE was detected by MTT as the A490 value.Hoechst 33258 fluorescence staining was used to determine the apoptosis of RPE.Flow cytometry method (FCM) was applied to detect the change of cell cycle and apoptosis rate of RPE cells. ResultsThe A490 values of RPE cells were 1.45±0.12,1.07±0.06,0.65±0.05 in blank control group,1.0 μmol/L Lipo-ASODN group and 2.0 μmol/L Lipo-ASODN group with the significant difference(P=0.00 ),and that of 1.0 μmol/L Lipo-ASODN group and 2.0 μ mol/L Lipo-ASODN group were significantly lower than the blank control group ( P =0.00,0.00).Hoechst 33258 staining showed that the apoptosis cells were obviously more in Lipo-ASODN group compared with blank control group.PDGFR-α ASODN transfection induced an increase of percentage of RPE cells in G0/G1 phase( F =206.70,P =0.00),and the apoptosis rates in 1.0 μmol/L Lipo-ASODN group and 2.0 μmol/L Lipo-ASODN group were significantly enhanced in comparison with blank control group ( 37.8 ± 1.3 vs 10.5 ± 0.1,61.2 ± 1.9 vs 10.5 ± 0.1 ) ( F =1808.90,P =0.00 ).Expression intensity of PDGFR-α mRNA in RPE cells in Lipo-ASODN groups was lower. ConclusionsBlocking the PDGFR-α expression with ASODN technology can suppress proliferation and induce apoptosis of RPE cells.Intensity of PDGFR-α mRNA expression in RPE cells is ASODN dose-dependent.ASODN targeted to PDGFR-α offers an experimental basis of the gene therapy for PVR.

OBJECTIVETo study the differences in the toxicity of vinegar-processed Kansui Radix on normal and cancerous ascites model rats.

METHODNormal and cancerous ascites model rats were taken as the research objects and orally administered with different doses of vinegar-processed Kansui Radix for 7 d. Pathological sections were prepared to observe the damages in liver, stomach, intestinal tissues in rats and detect the impacts on serum, liver, stomach and intestinal tissues and the oxidative damage index.

RESULTCompared with the blank group, all of normal administration groups and model groups showed significant damages in liver, stomach and intestinal tissues. Compared with the model groups, all of normal administration groups revealed notable alleviation in damages. Compared with the blank group, the model groups showed significant increases in AST, ALT and MDA in serum and liver (P < 0.01) and a significant decrease in GSH in serum and liver, stomach, intestinal tissues (P < 0.01). Compared with the blank group, the results showed significant decreases in ALT, AST in serum and ALT in liver in model low, medium and high dose groups and AST activity in liver tissues in the normal high dose group (P < 0.05, P < 0.01); significant decreases in GSH in serum and stomach tissues in normal low, medium and high dose groups and GSH content in liver and intestinal tissues in normal medium and high dose groups (P < 0.05, P < 0.01); notable rises in MDA in liver tissues in normal low, medium and high dose groups and MDA content in serum and stomach and intestinal tissues in normal medium and high dose groups (P < 0.05, P < 0.01). Compared with model groups, data revealed significant decreases in ALT, AST in serum in model low, medium and high dose groups, AST in liver tissues of model medium and high dose groups and ALT activity in liver in the model high dose group (P < 0.05, P < 0.01); significant increases in GSH content in serum and stomach tissues of model low, medium and high dose groups, GSH in liver tissues in model medium and high dose groups and GSH in intestinal tissues in the high dose groups (P < 0.05, P < 0.01); and notable declines in MDA content in serum in model low, medium and high dose groups, MDA in liver tissues of model medium and high dose groups and MDA in stomach and intestinal tissues the high dose group (P < 0.05, P < 0.01).

CONCLUSIONAccording to the study, vinegar-processed Kansui Radix showed a significant lower toxicity liver, stomach, and intestines of cancerous ascites model rats, which provided a basis for clinical safe application of vinegar-processed Kansui Radix based on symptom-based prescription theory.

Acetic Acid ; chemistry ; Animals ; Chemistry, Pharmaceutical ; methods ; Drug Prescriptions ; Drugs, Chinese Herbal ; chemistry ; isolation & purification ; toxicity ; Euphorbia ; chemistry ; toxicity ; Intestines ; drug effects ; pathology ; Liver ; drug effects ; metabolism ; pathology ; Male ; Neoplasms ; drug therapy ; metabolism ; pathology ; Oxidative Stress ; drug effects ; Plant Roots ; chemistry ; toxicity ; Rats ; Rats, Sprague-Dawley

To study the function of expelling water retention with drastic purgative of different polarities of Kansui Radix stir-baked with vinegar on the cancerous ascites model rats, the furosemide was taken as positive control drug, and the cancerous ascites model rats were respectively orally administered with different polarities of Kansui Radix stir-baked with vinegar for 7 d. The amount of urine and ascites, the level of urinary sodium, potassium, chloride ion and pH, and the content of PRL1, AII, ALD in serum were investigated. Compared with model groups, ethyl acetate extract group showed a decreasing trend in ascites; the amount of urine of showed a significant increase (P < 0.05); the level of urinary sodium, potassium, chloride ion (P < 0.05, P < 0.01), pH (P < 0.05), and the content of PRL1, AII, ALD in serum all showed a significant decrease (P < 0.01). The effects of petroleum ether extract and n-butanol extract were weaker than that of ethyl acetate extract. The water exact was the weakest. The results showed that ethyl acetate extract is the active part of Kansui Radix stir-baked with vinegar on the function of expelling water retention with drastic purgative on the cancerous ascites model rats, alleviating the water-electrolyte disorder and body fluid acid-base imbalance, regulating the renin angiotensin aldosterone system.
Animals ; Ascites ; drug therapy ; metabolism ; Cathartics ; administration & dosage ; chemistry ; isolation & purification ; Chemistry, Pharmaceutical ; Drugs, Chinese Herbal ; administration & dosage ; chemistry ; isolation & purification ; Euphorbia ; chemistry ; Humans ; Male ; Plant Roots ; chemistry ; Potassium ; urine ; Rats ; Rats, Sprague-Dawley ; Sodium ; urine ; Water ; metabolism

OBJECTIVETo observe the anti-inflammatory effect of total saponins of Panax japonicus on LPS-induced RAW264. 7 macrophages.

METHODThe effect of total saponins of P. japonicus of different concentrations on RAW264. 7 cell viability was determined with the MTT method. The NO kit assay was adopted to detect the NO release of total saponins of P. japonicus to LPS-induced RAW264. 7 cells. The enzyme linked immunosorbent assay (ELISA) was used to detect the secretion of tumor necrosis factor-alpha (TNF-alpha) and interleukin 1-beta (IL-1beta). The reverse transeriptase-polymerase chain reaction (RT-PCR) was used to determine the expression of inducible nitric oxide synthase (iNOS) ,TNF-alpha,IL-1beta. The protein expression of nuclear transcription factor-kappaB p65 (NF-kappaB p65) was tested by Western blot.

RESULTThe safe medication range of total saponins of P. japonicus was less than 80 mg x L(-1). Compared with the LPS model group, total saponins of P. japonicus high, middle and low dose groups (0.1, 1, 10, 40 mg x L(-1)) could significantly reduce the secretion of NO, TNF-alpha, IL-1beta of LPS-induced RAW264. 7 cells, and inhibit the expressions of iNOS, TNF-alpha and IL-1beta mRNA and the protein expression of NF-kappaB p65.

CONCLUSIONThis study preliminarily proves the protective effect of total saponins of P. japonicus on LPS-induced RAW264.7 macrophages. Its action mechanism may be related to NF-kappaB signal pathway.

Animals ; Anti-Inflammatory Agents ; pharmacology ; Drugs, Chinese Herbal ; pharmacology ; Humans ; Inflammation ; drug therapy ; genetics ; immunology ; Interleukin-1beta ; genetics ; immunology ; Lipopolysaccharides ; adverse effects ; Macrophages ; drug effects ; immunology ; Mice ; NF-kappa B ; genetics ; immunology ; Nitric Oxide ; immunology ; Nitric Oxide Synthase Type II ; genetics ; immunology ; Panax ; chemistry ; Protective Agents ; pharmacology ; Saponins ; pharmacology

Objective:To explore the application of model-based systems engineering (MBSE) in process design of management business of medical college and relevantly concrete practice.Methods:This research proposed a modeling method of MBSE to be used in Cameo Systems Modeler platform, and used systems modeling language (SysML) to complete the construction of simulating business environment of management business of medical college.And the business process of applying internet account was used as sample to construct activity graph of black box by adopting SysML.Through captured derivative demands to explore and construct activity graph of white box that based on SysML, and complete decoupling for the department of business process.At last, this research observed lane situation of user, and determined the relevant requirement and updated the design of business process.Results:The construction for top-level environment of business management in business process of medical college management has been completed.And a business process was chosen to implement optimization, and its results indicated the business that once need be completed in 3 times that included college, information center and finance office could be shortened to integrate directly entering information of new user, uploading identify card photography, completing check and opening account at backstage of information center and transferring account at backstage of finance office into completion at 1 time after the process was optimized.Conclusion:The modeling system of MBSE can meet the needs of sorting coupling business of medical college, and enhance design efficiency of system, and decrease iteration times of business process of users.

The paper introduces a method of self-gated signal's collection based on TrueFisp sequence, during self-gated cardiac magnetic resonance imaging. There is no significant difference in its image quality and only a slight loss in efficiency in comparison with MRI images by ECG-based triggering.
Electrocardiography ; methods ; Magnetic Resonance Imaging ; methods

Objective To evaluate the stability and biodistribution of a novel SPECT-MRI bi-functional agem 99Tcm-Gd-DTPA-DG in tumor-bearing nude mice. Methods DTPA-DG was synthesized and then conjugated with Gd2O3 to generate Gd-DTPA-DG. The tumor-bearing nude mice were scanned by MRI to evaluate the tumor targeting ability of Gd-DTPA-DG. The orthogonal experiment was applied to optimize pH value of reaction medium and reaction temperature. The radiolabeling efficiency was measured by thin layer chromatography. The distribution of 99Tcm-Gd-DTPA-DG in nude mice was evaluated by scintigrapy in vivo. The % ID/g was measured at different time after intravenous injection of 99Tcm-Gd-DTPA-DG. Results The tumor was significantly enhanced by Gd-DTPA-DG with MRI. The radiochemical purity of 99Tcm-Gd-DTPADG was about 98.5% and remained 96.2% at room temperature for 6 h. The tumor was well visualized by 99TcmGd-DTPA-DG SPECT at 2 h after injection. The tumor uptake was (1.48 ±0.12) %ID/g, and the rumor to muscle radioactivity ratio was 2.91. Conclusions MRI contrast of Gd-DTPA-DG may enhance tumor detection. 99Tcm-labeled Gd-DTPA-DG may be useful for tumor imaging and might have a potential role as a SPECT-MRI bi-functional agent.

OBJECTIVETo investigate the relationship between the changes of the copy numbers of mtDNA in peripheral blood mono-nucle- ar cell(PBMC) and the disordered of antioxidant capacity of hepatocellular carcinoma (HCC) patients.

METHODSThe Ficoll Hypaque method was used to isolate the PBMC from blood specimens. The ND1 gene of the mitochondrial was amplified by real-time PCR; meantime β-actin was served as a quantitative standard marker; the difference of mtDNA copy number in PBMC was compared between HCC and healthy control group. The level of reactive oxygen species (ROS) in PBMC was determined by flow cytometry. The change of total antioxidant capacity (T- AOC) of plasma was detected by the biochemistry examination.

RESULTSThe copy numbers of ND1 gene in PBMC of HCC was 73% that of the healthy control group,which suggested a decrease of the copy numbers of mtDNA in HCC. The levels of ROS of PBMC in HCC was (417. 82 ± 110.62) and (301.82 ± 75.54) in control group, which showed that the levels of ROS of PBMC in HCC were significant higher than that in control group (P < 0.01).Plasma T-AOC in HCC was (1.30 ± 0.85), and (3.20 ± 1.62) in control. The T-AOC of plasma of HCC was significantly lower than in control group (P < 0.01).

CONCLUSIONThere was a certain relationship between the decrease of the copy numbers of mtDNA and the disordered antioxidant capacity in hepatocellular carcinoma, which may be associated with the development of hepatocellular carcinoma.

Actins ; Antioxidants ; metabolism ; Carcinoma, Hepatocellular ; blood ; genetics ; Case-Control Studies ; DNA Copy Number Variations ; DNA, Mitochondrial ; genetics ; Humans ; Leukocytes, Mononuclear ; metabolism ; Liver Neoplasms ; blood ; genetics ; Reactive Oxygen Species ; metabolism