Wnt signaling plays an important role in blood tumorigenesis through the complex signal transduction pathways.Aberrant methylation of Wnt signaling inhibitor gene promoter leads to loss of function, which is involved in leukemia incidence and affects the relapse rate, disease free survival and overall survival.Demethylating agents or specific inhibitors of Wnt pathway, which was added in cell culture, increased apoptosis.Analysis of Wnt signaling pathway by aberrant methylation is important to guide lymphocytic leukemia prognosis and individual treatment.

Objective To observe the expression of HBV-DNA and whether there were copy of HBV in the umbilical cord tissues of the died fetus delivered from puerpera with hepatitis virus B. Methods 40 cases such died fetus were collected by routine autopsy to obtain umbilical cord tissues.And using in situ molecular hybridization technique detected HBV-DNA. Results For the umbilical cord tissues, there were 40%(16/40) cases detected out HBV-DNA.HBV-DNA mainly localization in the surface of the umbilical cord vessel and in the cytoplasma of the cord vessel's endothelial cells. They were not in the cord vessel's endothelial cells nuclei. Conclusions There were HBV replication in the umbilical cord tissues of the died fetus. But the expression of HBV-DNA in the umbilical cord tissues of the died fetus is not related with the HBV replication status in the pregnant woman veins.

Objective To study the safety and effectiveness of the double chain method on the closure of the space of the teeth. Methods Totally 72 cases of different maxillary and mandible dentition space were included in the study. The pulp vitality was measured before and after treatment, the maxillary and mandible first molar teeth. All values were compared to assess the safety of dental pulp vitality. There were 36 cases in tooth extraction group and non-tooth extraction group.The observation period was 4 weeks, the changes of the alveolar space between maxillary and mandible teeth in adult and minor groups were measured before and after treatment. The difference of the total groove spacing before and after treatment were calculated and compared, to assess the effectiveness of space closure. Results In all 72 patients, there was no significant difference in the vitality of the pulp before and after treatment (P>0. 05). Compared to before treatment, the sum of the distance between the upper and lower mandibular groove using the double chain method was significantly reduced for both adult and juvenile patients in the four week tooth extraction group and the nontooth extraction group,the difference was statistically significant (P<0. 05). Conclusion Double chain closed teeth space does not cause pulp degeneration and necrosis. It is safe in clinical practice. Double chain method is effective, and can simplify the clinical operation.

Nucleic acid sequencing was proceeded to examine the distribution of iNOS gene polymorphisms in type 2 diabetes in Singapore. There were significant differences in allele distribution between different ethnic groups, but the polymorphisms failed to display any association with DN.

To study the identification of Gentianaceae Mongolian medicine Digeda with spectroscopy techniques, near infrared spectroscopy and differential scanning calorimetry techniques were applied to study on the identification of 4 kinds of Gentianaceae Mongolian medicine Digeda, and characteristic spectrums obtained were systematically analyzed. In NIR study, the four species of Digeda exist some differences in 4 250-4 400 cm(-1) and 5 650-5 800 cm(-1) of one-dimensional spectra, and show significant differences in 4 100- 4 400 cm(-1), 4 401-4 900 cm(-1) and 5 400-5 800 cm(-1) of the second derivative spectra. DSC curves of them present distinct topological pattern, characteristic peak and peak temperature. Using near infrared spectroscopy and differential scanning calorimetry analysis can realize efficient and accurate identification of four kinds of Mongolian medicine Digeda, and provide scientific basis for the efficient and accurate identification of other Gentianaceae Mongolian medicine Digeda.
Calorimetry, Differential Scanning ; methods ; China ; Gentianaceae ; chemistry ; classification ; Medicine, Mongolian Traditional ; Spectroscopy, Near-Infrared ; methods

Objective To examine the association of intron 4 polymorphism in endothelial nitric oxide synthase ( eNOS) gene with diabetic nephropathy and its distribution in different ethnic groups of Singapore. Methods 258 patients with diabetic duration longer than 10 years (150 Chinese, 71 Malay and 37 Indian) were selected from both inpatients and outpatients of National University Hospital. Polymorphism was identified by DNA extraction, PCR, Cloning and sequencing. Results All published studies identified that the 27bp repeat polymorphism in intron 4 was biallelic ( a and b alleles ). Our study found a third allele-allele c, with six 27bp repeats. It was also demonstrated that there was no significant difference in overall allele distribution among the three main ethnic groups and the intron 4 polymorphism didn't show any association with diabetic nephropathy. Conclusion The intron 4 polymorphism was triallelic. We failed to demonstrate any association between this polymorphism with diabetic nephropathy.

The potential of a Sinorhizobium fredii strain producing a copolymer polyhydroxyalkanoate(PHA)from glucose and sodium decanoate substrates was studied in this paper.Using orthogonal design in a flask-shaker culture system,the culture medium,some culture conditions and vital regulation conditions for polymer synthesis were optimized.These optimized results were applied into further studies in two-stage fed-batch with a 10L fermentor.The whole culture process consisted of two stages,that is,the cell growth and the copolymer production.The first stage was for the cell growing to a desired biomass and the second was for the copolymer synthesis.For producing PHA polymers,the selected 8 mM sodium decanoate was added into the broth by adopting a two-step adding method for avoiding of foaming when the biomass had approached 28.5g/L dry cell.The maximum P(HB-HH)production could be 17.55 g/L with a monomer ratio of 79.4%(W/W)3-HB and 20.6%(W/W)3-HH.The molecule constitute of the copolymer is poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)[P(HB-HH)] and its molecular weight(MW)is 1.4?105D.The results demonstrated that the employed S.fredii strain could be a potential candidate for industrial production of the copolymer.The fermentation parameters acquired in the experimental system offered some valuable references for studying large-scale production of the copolymer.

Objective:To explore the effects of LncRNA HCG18 on endoplasmic reticulum stress and autophagy via regulating miR-185-5p/AGER axis in diabetic nephropathy (DN) .Methods:The kidney tissues of patients with DN were collected and the podocyte injury model induced by high glucose (HG) was established. The expression of HCG18 in renal tissue in DN patients and cell model was detected. The localization and expression of HCG18 in cells were determined. The regulatory relationship between HCG18 and miR-185-5p, miR-185-5p and AGER was testified. QRT-PCR and western blot were used to detect the expression of endoplasmic reticulum stress related factors (CHOP, XBP1) and autophagy related factors (Beclin-1, p62) .Results:Compared with non-DN patients, HCG18 was overexpressed in renal tissue of DN patients ( P<0.05) . Compared with normal glucose (NG) group, mRNA and protein expression of endoplasmic reticulum stress related factors (CHOP, XBP1) were overexpressed but mRNA and protein expression of autophagy related factors Beclin-1 were inhibited, p62 mRNA and protein expression were increased (all P<0.05) . HCG18 regulated the miR-185-5p/AGER axis and played a biological role. Knocking down of HCG18 reduced endoplasmic reticulum stress, activated autophagy and reduced podocyte injury, but this effect can be partially reversed by miR-185-5p inhibitors. Conclusion:HCG18 regulates the miR-185-5p/AGER signal axis and promotes DN progression through regulating endoplasmic reticulum stress and autophagy.

Objective To study the effect of different concentration of 1,25-dihydroxyvitamin D3[1,25(OH)2D3] on cell proliferation,differentiation and the expression of vitamin D receptor (VDR) in mouse MC3T3E1 osteoblast.Methods Osteoblast were cultured in medium with different concentrations of 1,25(OH)2D3.Incubated for 48 h,cell proliferation of osteoblast were examined by MTT reduction assay (mono-nuclear cell direc cytotoxicity assay),the osteocalcin (OC) levels in cell medium were detected by ELISA,and the expression of VDR mRNA and protein were examined by using SYBR Green real-time PCR and Western blot,respectively.Results 1.After incubation with 1,25(OH)2D3 for 48 h,the number of MC3T3E1 osteoblast was significantly less than that in control group(P0.05).3.SYBR Green real-time PCR and Western blot results showed that the expression of VDR mRNA as well as VDR protein of osteoblast in 10-8,10-9 mol/L experimental groups were significantly higher than those in control group (Pa0.05).Conclusions Cell proliferation of mouse osteoblast can be inhibited,while the cell differentiation was promoted by 1,25(OH)2D3.1,25(OH)2D3 up-regulated the expression of VDR in mouse osteoblast,which suggested that the VDR signal pathway may play some role in proliferation and differentiation of osteoblast.

To investigate whether accelerated blood clearance (ABC) phenomenon could be induced after repeated injection of mitoxantrone thermosensitive liposomes, LC-MS/MS and enzyme linked immunosorbent assay (ELISA) were used to measure the concentration of mitoxantrone and the anti-polyethylene glycol (PEG) IgM levels in rat plasma, separately. The drug was rapidly cleared away after the second administration. The anti-PEG IgM was detected after the first dose which was neutralized quickly after the second dose. It is proved that repeated administration of mitoxantrone thermosensitive liposomes in rat caused the ABC phenomenon.
Animals ; Antineoplastic Agents ; administration & dosage ; blood ; pharmacokinetics ; Chromatography, High Pressure Liquid ; Immunoglobulin M ; blood ; Liposomes ; administration & dosage ; blood ; pharmacokinetics ; Male ; Metabolic Clearance Rate ; Mitoxantrone ; administration & dosage ; blood ; pharmacokinetics ; Polyethylene Glycols ; administration & dosage ; chemistry ; pharmacokinetics ; Rats ; Rats, Wistar ; Spectrometry, Mass, Electrospray Ionization ; Tandem Mass Spectrometry