The varicela-zoster virus(VZV) infection causes central vasculopathy,and then leads to stroke onset. This article review s the correlation betw een VZV infection and stroke onset in order to conduct a comprehensive assessment of patients w ith VZV infection, thereby reducing the risk of stroke after VZV infection.

BACKGROUND: Simple nanotube surface modification of titanium implant has been shown to promote adhesion, proliferation and differentiation of osteoblasts. Collagen coating can promote osteoblast adhesion and osseointegration in vivo. OBJECTⅠVE: To observe the effects of type collagen combined titanium dioxide nanotube composite coating modified titanium surface on osteoblast adhesion in vitro and osseointegration in vivo. METHODS: The titanium dioxide nanotube was fabricated on the pure titanium surface, then type Ⅰ collagen was combined with the nanotube structure to form composite coating. Scanning electron microscope observation was used to characterize the surface topography of the pure titanium, titanium dioxide nanotube and type Ⅰ collagen combined titanium dioxide nanotube surfaces. Contact angle test was employed to evaluate the hydrophilicity of different samples. MC3 T3-E1 murine preosteoblasts were seeded on the three kinds of materials for 4 hours. Cell adhesion morphology was examined by scanning electron microscope. Adherent cell counting was detected under inverted fluorescence microscope. Expression of actin cytoskeleton and vinculin was observed under laser scanning confocal microscope. The gene expression of vinculin and osteoprotegerin mRNA was detected by real-time quantitative PCR. The three kinds of samples were implanted into the tibia of Sprague-Dawley rats (provided by Laboratory Animal Center, Ⅰnstitute of Radiation Medicine, Chinese Academy of Medical Sciences) , and tibia samples were removed after 4 weeks of implantation for biological push-out test and histological observation. RESULTS AND CONCLUSⅠON: (1) Scanning electron microscope: There was mechanical scratch on the pure titanium surface. There was controllable, and uniform vertical arrangement of nanotubular structures with a diameter of approximately 70 nm on the titanium dioxide nanotube surface, and collagen adhered surrounding the nanotubular structures on the type Ⅰ collagen combined titanium dioxide nanotube substrate, and partial tubule orifices were closed. (2) The hydrophicility of type Ⅰ collagen combined titanium dioxide nanotube was significantly larger than those of the other two materials (P < 0.05) . (3) Compared with the pure titanium and titanium dioxide nanotube surfaces, the type Ⅰ collagen combined titanium dioxide nanotube substrate displayed increased adherent cell number, much well-organized cytoskeleton, enhanced immunofluorescence intensity of vinculin protein staining, and increased expression levels of vinculin and osteoprotegerin mRNA levels (all P < 0.05) . (4) Ⅰn vivo test revealed that the maximum push-out force in the type Ⅰ collagen combined titanium dioxide nanotube group was significantly higher than that in the pure titanium and titanium dioxide nanotube groups (P < 0.05) . Hematoxylin-eosin staining results showed that there were few bones, but many fibrous connective tissue surrounding the implant in the pure titanium group; there were more newly-born bones, and less fibrous connective tissue surrounding the implant in the titanium dioxide nanotube group; there were dense newly-born bones, and few thin fibrous connective tissue surrounding the implant in the type Ⅰ collagen combined titanium dioxide nanotube group. (5) These results indicate that type Ⅰ collagen combined titanium dioxide nanotube surface can facilitate osteoblast cell adhesion and promote osseointegration in vivo.

Objective To look for more serum biomarkers supporting the diagnosis of multiple system atrophy ( MSA) and providing more evidence for early treatment.Methods All patients and healthy controls were enrolled from January 2011 to March 2015 in the First Affiliated Hospital of Zhengzhou University.Demographic features and biochemical examination results were collected.The t test was used to compare the lipid levels between MSA patients and controls.LSD-t test was used to compare the lipid levels among subtypes of MSA patients.Multivariate Logistic regression analysis was conducted to analyze the influencing factors.The relevance between lipid levels and onset age, disease duration and Hoehn & Yahr stage was calculated by Spearman correlation coefficients.Results Participants included 195 MSA patients and 195 age-and gender-matched controls with no neurological diseases.The levels of total cholesterol ((4.33 ±0.90) mmol/L), triglyceride ((1.27 ±0.71) mmol/L), low-density lipoprotein (LDL;(2.70 ±0.76) mmol/L) were significantly lower in patients than in controls ((4.52 ±0.85), (1.47 ± 0.86), (2.85 ±0.71) mmol/L ,t=2.056,2.528 and 2.149 respectively, all P<0.05).The levels of total cholesterol ((4.28 ±0.96) mmol/L) and triglyceride ((1.20 ±0.64) mmol/L) were significantly lower in MSA-P patients than in control group ((4.52 ±0.85), (1.47 ±0.86) mmol/L;LSD-t=1.983, 2.566, both P<0.05).After adjusting for age, gender and histories, the odds ratio ( OR) was 0.31 (95%CI 0.15-0.65, P =0.002 ) for MSA patients in the highest quartile of triglyceride and 0.38 (95%CI 0.17 -0.83,P=0.016) for those in the highest quartile of high-density lipoprotein (HDL), compared with the lowest quartiles.And HDL level was in a significantly positive correlation with onset age (r=0.15, P=0.039).Conclusion Our data suggest that triglyceride and HDL may be associated with the prevalence of MSA, and the lower levels of HDL, the earlier onset of MSA.

OBJECTIVETo screen the 5' regulatory region of the aldose reductase (AR) gene for genetic variabilities causing changes in protein expression and affecting the promoter function.

METHODSThe screenings were carried out by polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP). All SSCP variants were submitted for DNA sequencing and inserted into the plasmid chloromycetin acetyl transferase (CAT) enhancer vector. The constructs were used to transfect Hela cells, and CAT assays were performed to assess promoter activity. Gel mobility shift and footprinting assays were also performed to determine the interaction between the DNA and nuclear proteins.

RESULTSTwo polymorphisms, C (-106) T and C (-12) G, were identified in the regulatory region in 123 Chinese control subjects and 145 patients with type 2 diabetes mellitus. The frequencies of genotypes WT/WT, WT/C (-12) G and WT/C (-106) T were not significantly different between the subjects and patients. In the patients with and without retinopathy, frequencies of WT/C (-106) T were 31.5% and 17.5% (P < 0.05) respectively, and the frequencies of WT/C (-12) G were 10.5% and 2.5% (P > 0.05) respectively. The total frequency of WT/C (-12) G and WT/C (-106) T in patients with retinopathy was 41.8%, significantly higher than that (20.0%) in patients without retinopathy (P < 0.025). The relative transcription activities of the wild-type, the C (-12) G and the C (-106) T were 15.7%, 31.0% and 32.2%, respectively. The results of DNA-protein interaction assays showed that these variations did not change the binding site of DNA with trans-acting factors.

CONCLUSIONThe polymorphisms C (-12) G and C (-106) T strongly associated with diabetic retinopathy in the Chinese population have been identified in the regulatory region of the aldose reductase gene.

5' Flanking Region ; genetics ; Adult ; Aldehyde Reductase ; genetics ; metabolism ; Binding Sites ; genetics ; China ; Chloramphenicol O-Acetyltransferase ; genetics ; metabolism ; DNA ; chemistry ; genetics ; DNA Footprinting ; Diabetes Mellitus, Type 2 ; enzymology ; genetics ; Electrophoretic Mobility Shift Assay ; Female ; HeLa Cells ; Humans ; Male ; Middle Aged ; Mutation ; Polymerase Chain Reaction ; Polymorphism, Genetic ; Polymorphism, Single-Stranded Conformational ; Recombinant Fusion Proteins ; genetics ; metabolism ; Regulatory Sequences, Nucleic Acid ; genetics ; Sequence Analysis, DNA ; Transcription, Genetic

We studied the mutation effect of subsites -3(Lys47), -7(146-152), and cyclization center (Tyr195) in active domain on product specificity of alpha-cyclodextrin glucanotransferase (alpha-CGTase) from Paenibacillus macerans sp. 602-1. The Lys47 was replaced by Thr47 and Tyr195 by Ile195, and the amino acids from 146 to 152 were replaced by Ile (named as delta6). All these mutant alpha-CGTases were actively expressed in E. coli BL21. Compared with the wild-type alpha-CGTase, the starch-degrading activities of all the mutant enzymes were declined. For mutant Y195I, the percentage of alpha-CD was decreased from 68% to 30%, and beta-CD was raised from 22.2% to 33.3%. Interestingly, gamma-CD was increased from 8.9% to 36.7% and became the main product, while the actual yield was increased from 0.4 g/L to 1.1 g/L. Mutant K47T and delta6 still produced alpha-CD as main product though the percentage of beta- and gamma-CD increased. Purified Y195I CGTase showed similar optimum temperature with the wild-type alpha-CGTase, but its optimum pH shifted from 5.0 to 6.0 with better pH stability. In summary, mutant Y195I CGTase has the potential to produce gamma-CD as the main product.
Escherichia coli ; genetics ; metabolism ; Glucosyltransferases ; genetics ; metabolism ; Mutant Proteins ; genetics ; metabolism ; Mutation ; Paenibacillus ; enzymology ; Recombinant Proteins ; genetics ; gamma-Cyclodextrins ; metabolism

Angelicae Sinensis Radix (AS) is reproted to exert anti-depression effect (ADE) and nourishing blood effect (NBE) in a rat model of depression. The correlation between the two therapeutic effects and its underlying mechanisms deserves further study. The current study is designed to explore the underlying mechanisms of correlation between the ADE and NBE of AS based on hepatic metabonomics, network pharmacology and molecular docking. According to metabolomics analysis, 30 metabolites involved in 11 metabolic pathways were identified as the potential metabolites for depression. Furthermore, principal component analysis and correlation analysis showed that glutathione, sphinganine, and ornithine were related to pharmacodynamics indicators including behavioral indicators and hematological indicators, indicating that metabolic pathways such as sphingolipid metabolism were involved in the ADE and NBE of AS. Then, a target-pathway network of depression and blood deficiency syndrome was constructed by network pharmacology analysis, where a total of 107 pathways were collected. Moreover, 37 active components obtained from Ultra Performance Liquid Chromatography-Triple-Time of Flight Mass Spectrometer (UPLC-Triple-TOF/MS) in AS extract that passed the filtering criteria were used for network pharmacology, where 46 targets were associated with the ADE and NBE of AS. Pathway enrichment analysis further indicated the involvement of sphingolipid metabolism in the ADE and NBE of AS. Molecular docking analysis indciated that E-ligustilide in AS extract exhibited strong binding activity with target proteins (PIK3CA and PIK3CD) in sphingolipid metabolism. Further analysis by Western blot verified that AS regulated the expression of PIK3CA and PIK3CD on sphingolipid metabolism. Our results demonstrated that sphingolipid metabolic pathway was the core mechanism of the correlation between the ADE and NBE of AS.
Rats ; Animals ; Rats, Sprague-Dawley ; Molecular Docking Simulation ; Network Pharmacology ; Drugs, Chinese Herbal/chemistry* ; Metabolomics/methods* ; Mass Spectrometry