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Two ent-kauranoids were isolated from the ethanol extraction of rhizomes of Canna generalis (Cannaceae), and were purified by various technologies, including silica gel and high performance liquid chromatography, and their structures were determined by modern spectroscopy techniques as (5R,8S,9S,10R,13R)-2-oxo-ent-kaur-15-en-17-oic acid (1) and (4R,5S,8S,9S,10S,13R)-19-hydroxy-ent-kaur-15-en-17-oic acid (2). Compound 1 is a new ent-kauranoid, and compound 2 is obtained from rhizomes of Canna generalis for the first time.
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The blood-brain barrier (BBB) not only maintains the stability of the environment within the central nervous system by controlling the transport of substances on both sides of the blood and brain, but also plays an important role in the R&D of new drugs for neurological disorders. The establishment of an in vitro high-fidelity model to study BBB function is imperative for assessing barrier permeability of drugs and xenobiotics. However, the complexity of the BBB structure makes it difficult to replicate with an in vitro model. Compared to the traditional in vitro BBB model, the BBB-on-chip provides certain advantages in miniaturizing the system, reducing the amount of cells and medium required, and allowing simultaneously induction of shear stress. We review here the BBB-on-chip models from their establishment and characterization to applications in research of neuroinflammation, brain tumor and drug evaluation.
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OBJECTIVE@#To study whether polymorphisms in the iodothyronine deiodinase (DIO) gene region contribute to endurance exercise capacity and to validate whether TSHR gene can be used as genetic marks associated with aerobic endurance performance.@*METHODS@#Three SNPs (C785T in DIO1 gene regions, Thr92Ala and Gly3Asp in DIO2 gene regions) were selected. The genotypes of the 123 elite long running athletes(EEA) and 127 college students from northern China(CG) were analyzed using the matrix assisted laser desorption ionisation-time of flight mass spectrometry method(MALDI-TOF). The athletes were divided into different groups according to the sports level and the items, which are international masters and masters (43 vs 80), 5/10 km and marathon (92 vs 31).@*RESULTS@#There was no significant difference of the C785T loci in DIO1 gene and the Thr92Ala loci in DIO2 gene between the EEA and the CG(P＞0.05), while at Gly3Asp loci, the frequency distributions of the 3 genotypes were remarkably different in the groups of control and international masters of sports, as well as in the groups of control and marathon athletes(P＜0.05). The genotype TT only existed in EEA not in CG, however, the frequency distribution was very low. The Thr92Ala and Gly3Asp loci of DIO2 gene were in strong linkage disequilibrium. The frequency distributions of the haplotype CT were significantly different in the male CG and the female CG, the male CG and the male EEA(P＜0.05), the male CG and the male masters of sports, as well as in the male CG and the male marathon athletes(P＜0.05). The frequency distributions of the haplotype TC were remarkably higher in the groups of female international masters of sports and female 5 000 m/10 000 m than those in the female CG(P＜0.05).@*CONCLUSION@#The frequency distributions of the haplotype CT were different in male and female CG, and haplotype CT could be used as a genetic mark associated with aerobic endurance performance of the male EEA, especially for the long running athletes of masters of sports and marathon, while the haplotype CT was associated with the aerobic endurance performance of the female long running athletes of international masters of sports and 5 000 m/10 000 m.
Subject(s)
Female , Humans , Male , Athletes , China , Genotype , Haplotypes , Iodide Peroxidase , Genetics , Physical Endurance , Genetics , Polymorphism, Single Nucleotide , RunningABSTRACT
OBJECTIVE To observe the effects of serum metabolites by using 1H-NMR-based metabonomic approach to explore the possible mechanisms of total flavonoids in Ocimum Basilicum Linn (OBL) on atherosclerosis in apolipomtein E knockout (ApoE-/-) mice. METHODS Six-week-old male apoE knockout mice were divided into four groups(n=10)and fed with high fet diet:model,Simv-astatin, OBL-H, OBL-M and OBL-L groups. The homogeneous male mice of C57BL/6J were used as the normol group and fed with normal chow diet. After 14 weeks,1H-NMR technology was used to ex-plore the variability of serum metabolites by the method of PLS-DA and OPLS-DA. RESULTS Com-pared with normal group,Model group showed a significant increase in the serum levels of VLDL,LDL, β-hydroxyisobutyrate,lactate,myo-inositol and showed a significant decrease in the serum levels of al-anine, glutamine, proline, carnitine, methylamine, citrate, creatine, choline, taurine, pyruvate, β-glu-cose, α-glucose, glycine, lysine. Combined with model group OBL-H, OBL-M, OBL-L groups showed the effects of regulating the levels of different metabolites of the glucose,lipid and amino acid metabo-lism.CONCLUSION The anti-atheros-clerotic activity of total flavonoids in Ocimum Basilicum Linn may be related not only to regulation of lipid metabolism,but also glycometabolism and amino acid metabolism.
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OBJECTIVE 1H-NMR-based metabolomics approach was conducted to holistically explore the effect and mechanisms of Cydonia oblanga Mill flavonoids(COMF)on high-fat diet induced Atherosclerosis (AS) apoE-/- mice. METHODS AS model was established on the apolipoprotein e knockout mice by high-fat diet. The ApoE-/- mice were split into 6 groups including control group, AS model group,COMF High dose(COMF-H)group,COMF medium dose(COMF-M)group,COMF Low dose (COMF-L) group and Simvastatin group as the positive control group. Serum samples from all groups were analyzed by 1H-NMR technology and the OPLS-DA was conducted to distinguish the metabolic phenotypes. RESULTS Compared to the control group, serum levels of cholesterol, VLDL, leucine, isoleucine, valine, blood lipid, citrulline, methylamine, glucose, glycine, glycerol, myo-inositol, fructose, phenylalanine, unsaturated lipid, urea and other metabolites content significantly increased, while HDL, lactate, alanine, glutamate, glutamine, pyruvate, carnitine, citrate, choline content signifi-cantly decreased and the difference was statistically significant (P<0.05). The trend of metabolites in serum samples of COMF low, medium and high group was opposite to that of atherosclerosis model group and the difference was statistically significant(P<0.05).CONCLUSION Through functional analysis of these biomakers,amino acid metabolism,lipid metabolism,cholesterol metabolism,energy metabolism and inflammation reaction were considered as the most relevant pathological biomakers in the serum of AS mice.This study also demonstrates that COMF had the therapeutic effectiveness on AS through partly reversing the lipid,cholesterol,amino acid,energy metabolism and Inflammation reaction.
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OBJECTIVE Using bronchial asthma rats, to observe the effects of Smooth wheezing effect of polysaccharide. In addition, to study the effects of COM in different bronchial asthma model. METHODS Bronchial rats established by ovalbumin (OVA), were randomly divided into different group.Every other week building reference literature intraperitoneal injection of OVA, 21 d after injection of 3 consecutive ultrasonic atomization inhalation of 1% OVA stimulating 30 d,stimulate the 31 d began to medicine.Lavage for 4 weeks ELISA test ratio of IgE,SP-A,IL-4 and IL-5 was serum and bronchoal veolar lavage fluid etc.Data was in x ± s tabular format,SPSS16.0 statistics software is used to perform statistical analysis on the data, and P<0.05 shows meaningful statistical difference. RESULTS Quince polysac-charide can reduce the IgE,IL-4 level and elevated the SP-A,IL-5 level in serum and bronchoal veolar lavage fluid.CONCLUSION Quince polysaccharide has antiasthmatic effect on bronchial asthma rats.
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Objective To explore the value of class 100 laminar flow ward in the prevention of infection in patients with hematological malignancies(HM) after chemotherapy.Methods Patients with HM and received chemotherapy in the department of hematology in a hospital from March 2016 to February 2017 were surveyed retrospectively,according to patients' wishes,those who were admitted to the class 100 laminar flow ward and received chemotherapy were as trial group,and those who were admitted to the common ward and received chemotherapy were as control group.The incidence of infection,duration of fever,antimicrobial use time,length of hospital stay,and index of infection were compared and analyzed between two groups.Results A total of 267 patients with HM received chemotherapy,74 cases in trial group and 193 in control group.During the chemotherapy period,incidence of infection in trial group was lower than that of control group (47.3％ vs 72.0％,P＜0.001).Respiratory tract,digestive tract,and urinary tract were main infection sites in both groups.A total of 45 strains of pathogens were isolated from two groups of patients,7 strains were isolated from trial group and 38 from control group.The isolated pathogens were Escherichia coli,Klebsiella pneumoniae,Stenotrophomonas maltophilia,Pseudomonas aeruginosa,and yeast.Duration of fever,antimicrobial use time,and length of hospital stay in trial group were all lower than control group (all P＜0.05);serum procalcitonin (PCT) and C-reactive protein (CRP) levels in trial group were both lower than control group(both P＜0.01),the time for PCT and CRP to return to normal in trial group were both lower than control group(both P＜0.05).Conclusion Patients with MH and receive chemotherapy in class 100 laminar flow ward can reduce the incidence of infection,shorten the length of stay,and reduce the economic burden,it is worthy of further clinical promotion.
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<p><b>OBJECTIVE</b>To overexpress hepatitis B virus S gene in CHO cells cultured in serum-free media.</p><p><b>METHOD</b>Plasmid was constructed by cloning of HBV S gene and then it was transfected into CHO cells. After cell screen, the positive clones were identified and isolated into a serum-free media followed by the serological and morphological characterization of the expression product.</p><p><b>RESULT</b>CHO cell strains which can express HBsAg efficiently and stably were obtained. Spherical and filamentous HBsAg could be detected under electronic microscope. The titer of the expression product was up to 1:5000.</p><p><b>CONCLUSION</b>Serum-free media cultured CHO cell strain for overexpression of HBsAg was successfully constructed and the expression product was high antigenic.</p>
Subject(s)
Animals , Cricetinae , CHO Cells , Cricetulus , Gene Expression , Hepatitis B Surface Antigens , Genetics , Allergy and Immunology , TransfectionABSTRACT
Background & Objective:Background &Objective: The class Ⅰ Alcohol Dehydrogenases (ADH) play a key role in hepatic alcohol catabolism. Human ADH is encoded by at least seven genes, and three class Ⅰ ADH genes-ADH1, ADH2 and ADH3, which encode the α, β, and γ subunit respectively, had been isolated and mapped on chromosome 4q21-q25. This experiment tends to clone the human class Ⅰ ADH and investigate its role in the hepatic alcohol catabolism. Methods: A pair of primers were designed and the full-length cDNAs encoding human Class Ⅰ ADH were cloned at one time. Class Ⅰ ADH cDNAs were amplified with RT-PCR from total RNA extracted from fetal human liver and kidney, and cloned into pGEM-T vector. To identify cDNA segments, a pair of differential primers was designed. By using them, a portion of the ADHs which encodes the segment from -4 to 296 was cloned. These cDNA segments then were detected directly when being digested with Kpn Ⅰ and Pst Ⅰ, respectively. Then all the full-length cDNAs were subcloned in the plasmid pTYB11 and expressed in E. Coli. Stably. Alcohol Dehydrogenase activity of catalyzing alcohol were monitored at 340 nm. Results: Here we had successfully the human class Ⅰ ADH cloned and the full-length cDNAs expressed in E.col.I stably. The relative activity of recombinant enzymes metabolizing ethanol was 0.81 ～1.31 U/mg,0.09 ～0.15 U/mg and 0.76～1.11 U/mg, respectively. Conclusions: In the paper, the full-length cDNAs encoding human class Ⅰ AD H were successfully cloned and expressed and the recombinant enzymes showed the activities similar to the ones isolated from liver.
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Background & Objective:Background &Objective: The class Ⅰ Alcohol Dehydrogenases (ADH) play a key role in hepatic alcohol catabolism. Human ADH is encoded by at least seven genes, and three class Ⅰ ADH genes-ADH1, ADH2 and ADH3, which encode the α, β, and γ subunit respectively, had been isolated and mapped on chromosome 4q21-q25. This experiment tends to clone the human class Ⅰ ADH and investigate its role in the hepatic alcohol catabolism. Methods: A pair of primers were designed and the full-length cDNAs encoding human Class Ⅰ ADH were cloned at one time. Class Ⅰ ADH cDNAs were amplified with RT-PCR from total RNA extracted from fetal human liver and kidney, and cloned into pGEM-T vector. To identify cDNA segments, a pair of differential primers was designed. By using them, a portion of the ADHs which encodes the segment from -4 to 296 was cloned. These cDNA segments then were detected directly when being digested with Kpn Ⅰ and Pst Ⅰ, respectively. Then all the full-length cDNAs were subcloned in the plasmid pTYB11 and expressed in E. Coli. Stably. Alcohol Dehydrogenase activity of catalyzing alcohol were monitored at 340 nm. Results: Here we had successfully the human class Ⅰ ADH cloned and the full-length cDNAs expressed in E.col.I stably. The relative activity of recombinant enzymes metabolizing ethanol was 0.81 ～1.31 U/mg,0.09 ～0.15 U/mg and 0.76～1.11 U/mg, respectively. Conclusions: In the paper, the full-length cDNAs encoding human class Ⅰ AD H were successfully cloned and expressed and the recombinant enzymes showed the activities similar to the ones isolated from liver.