Objective:To evaluate the effect of different polishing instruments on the microstructure of composite resin.Methods:Specimens of 5 kinds of resins were randomly divided into three groups and were polished with Astropol(group A),Sof-Lex(group B) and Super-snap(group C)respectively(n=3 for each resin).Specimens of natural enamel surface were used as the controls(group D).The surface roughness(Ra)and microstructure of the specimens were evaluated by an atomic force microscope(AFM).Results:Ra value in group A was lower than that in group B(P=0.015);Z350 XT resin obtained the lowest Ra value among the 5 kinds of resin specimens(P<0.05).All of the resin specimens had similar average Ra after polishing procedure(P>0.05).Conclusion:Astropol polishing instrument is better than Sof-Lex;Z350 XT has better polish performance.The three polishing instruments are ef-fective in polishing the 5 composite resins.

Humans ; Accidents, Traffic ; Colon, Sigmoid ; Forensic Medicine ; Autopsy ; Abdominal Injuries ; Thoracic Injuries ; Rupture

Objective To observe the expression of STEAP4 gene(a novel obesity-related gene) during the period of human preadipocyte differentiation and to explore the relationship between the STEAP4 gene expression and adipocytes differentiation,adipogenesis.Methods Human preadipocytes were cultured and differentiated into the matured adipocytes in vitro.Adipocytes morphology and lipid accumulation were observed during this process.Total RNA was extracted from adipocytes at various time points (preadipocyte,Day 0,Day 4,Day 6,Day 8,Day 11,Day 14,and Day 17) and the level of STEAP4 mRNA expression was measured by fluorescent real-time quantitative reverse transcriptase-polyme-rase chain reaction(RT-PCR).Results The level of STEAP4 mRNA expression remained high in preadipocytes.In the presence of differentiation medium (Day 4),there was a transient upregulation in the expression of STEAP4 gene.After that,with the human preadipocytes being differentiated into matured adipocytes,the expression of STEAP4 mRNA was downregulated and reached the lowest level in fully differentiated adipocytes.There was a significant difference between any 2 detected phases in the level of STEAP4 mRNA expression (Pa

OBJECTIVETo observe the effect of Schisandra chinensis lignans (SCL) on neuronal apoptosis and PI3K/AKT signaling pathway of rats in the cerebral ischemia injury model, and study its possible mechanism.

METHODRats were orally administered SCL high, middle and low dose groups (100, 50, 25 mg x kg(-1)) for 14 days. The cerebral ischemia injury model was established by using the suture-occluded method to rate the neurological functions. The cerebral infarction area was observed by TTC staining. The pathological changes in brain tissues were determined by HE staining. Bcl-2 and Bax expressions were detected by immunohistochemical assay. The protein expressions of p-AKT and AKT were assayed by Western blotting.

RESULTCompared with the model group, SCL high, middle and low dose groups showed reduction in the cerebral infarction area to varying degrees, improve the pathological changes in brain tissues, promote the expression of apoptin Bcl-2 and p-AKT, and inhibit the expression of apoptin Bax.

CONCLUSIONSCL shows a protective effect on rats with cerebral ischemia injury. Its mechanism may be related to the increase in p-AKT ability and antiischemic brain injury capacity and the inhibition of nerve cells.

Administration, Oral ; Animals ; Apoptosis ; drug effects ; Blotting, Western ; Brain Ischemia ; metabolism ; pathology ; prevention & control ; Disease Models, Animal ; Dose-Response Relationship, Drug ; Immunohistochemistry ; Lignans ; administration & dosage ; pharmacology ; Male ; Neurons ; drug effects ; metabolism ; pathology ; Phosphatidylinositol 3-Kinases ; metabolism ; Phosphorylation ; Phytotherapy ; Proto-Oncogene Proteins c-akt ; metabolism ; Proto-Oncogene Proteins c-bcl-2 ; metabolism ; Rats ; Rats, Sprague-Dawley ; Schisandra ; chemistry ; Signal Transduction ; drug effects ; bcl-2-Associated X Protein ; metabolism

This study aimed to analyze the etiology of the encephalitis outbreak in Longyan, Fujian Province, China in 2010, in order to provide valuable information for this prevention and control of this disease. Pathogens were confirmed from cerebrospinal fluid samples with fluorescent RT-PCR, virus isolation (RD cells), and neutralization tests. Then, the VP1 fragments or whole genome nucleotide sequences were determined for four virus strains using PCR. Homology was assessed using the MegAlign software, and a phylogenetic evolutionary tree was drawn using Mega 4.0 software. The results confirmed that the etiology of the outbreak was the ECHO6 intestinal virus, and the nucleotide sequence of the VP1 segment indicated that the C2 subtype was responsible. The genome sequence consisted of 7407 nucleotides, and resembled the genome of other ECHO and CoxB viruses with homology levels of 78.5%-87.3%. The encephalitis outbreak in Longyan in 2010 was caused by the ECHO6 C2 subtype intestinal virus, and its complete genome sequence length is similar to the standard strain (U16283) with a sequence homology of 80.4%.
Child, Preschool ; China ; epidemiology ; Disease Outbreaks ; Echovirus 6, Human ; classification ; genetics ; isolation & purification ; Echovirus Infections ; epidemiology ; virology ; Encephalitis ; epidemiology ; virology ; Female ; Humans ; Infant ; Male ; Molecular Sequence Data ; Phylogeny

[Summary] According to urinary albumin excretion rates ( UAER) , 256 patients with type 2 diabete mellitus (T2DM) were divided into normal albuminuria (NA), microalbuminuria (MA), and clinical nephropathy (CN) groups while 108 healthy subjects as control group. The analysis of variance of single factor was applied to examine lipoprotein(a), triglyceride, total cholesterol(TC), low-density lipoprotein cholesterol(LDL-C), cystatin C, and homocysteine. The correlations of lipoprotein ( a ) with urinary albumin excretion rate ( UAER ) and glomerular filtration rate ( eGFR ) were analyzed by Pearson correlation analysis. The sensitivities of lipoprotein ( a ) were evaluated in diagnosis of diabetic nephropathy ( DN) by receiver operating characteristic curve. The results showed that lipoprotein ( a) levels in NA, MA, and CN groups were gradually increased, with a significant increase in CN group(P<0. 05). Pearson correlation analysis revealed that lipoprotein (a) was positively correlated with systolic pressure, TC, cystatin C, and UAER(all P<0. 05) and negatively correlated with fasting blood glucose and eGFR (P<0. 05). The area under the ROC curve of lipoprotein(a) was 0. 639, with the sensitivity 66. 4% and specificity 55. 9% in the optimal cutoff value of 8. 41 mg/dl. These results suggest that lipoprotein(a) may serve as an index for monitoring DN based on its better correlation with UAER and eGFR.

【Objective】To observe the efficacy and side effects of hematopietic stem cell transplantation with combination of umbilical cord blood(UCB) and neonatal peripheral blood(NPB) in the treatment of β-thalassemia major.【Methods】28 mL NPB was drawn from a HLA identical neonate within 5 hours after his birth to complement stem cell of the UCB he donated for transplantation to his sibling with β-thalassemia major.Various items of hematopoiesis reconstruction were detected in UCB and NPB respectively.After conditioning with chemotherapy by using busulfan 20 mg/kg,cyclophosphamide 200 mg/kg,melphalan 90 mg/m2 and antithymocyte globulin(ATG) 90 mg/kg,the patient received the 53 mL UCB and 28 mL NPB,achieving 5.7×107/kg nucleated cells(NC),93×105/kg CFU-GM and 3.1×105/kg CD34+CD38- cells from his HLA-identical sibling.【Results】Absolute nucleated cell(ANC) reached 0.5×109/L on 14th day post transplant,and platelets reached 20×109/L on 34th day after transplant.The heterozygosity of β-654 mutation point was detected by the PCR-RDB.The sexual chromosome changed from XX pretransplant to XY posttransplant.The patient was free red blood cell transfusion from 14th day post transplant.Her hemoglobin rose progressively from 86 g/L to 110 g/L.The patient survived for 197 days free from disease after transplantation.Following up for 9 months, the donor grew and developed normally.【Conclusion】The NPB contains a lot of stem cells.The transplantation with combination of suitable NPB and UCB is an effective tactics when the UCB cells are deficient.

The 1.23 kb DNA fragment encoding the early protein EP0 of pseudorabies virus (PRV) Ea strain was amplified by PCR technique and cloned into pBluescriptII sk+.Three sequencing plasmids containing the partial fragment of the EP0 gene were constructed and the sequences were obtained by Sanger's sequencing technique. Compared with PRV InFh strain, there were multipile site-mutations and a deleted-mutation in the EP0 gene of PRV strain Ea，and the diversity of amino acid residues also existed.Then, the EP0 gene was inserted into an expression vector, pET-28a, fused into the downstream of the 6ΧHis-Tag in frame, to yield the expression plasmid pETEP0. After induction by IPTG, a high expression of fusion protein was obtained, SDS-PAGE analysis and Western blotting showed that the fusion protein was 62kD and the protein was specific to antisera against PRV Ea strain. This indicated that the EP0 gene be expressed in BL21(DE3) and the expression products have immuno-genicity.

The effect of triptolide on proliferation and apoptosis of human multiple myeloma RPMI-8226 cells in vitro, as well as the roles of nuclear factor-kappa B (NF-κB) and IκBα was investigated. The effect of tritptolide on the growth of RPMI-8226 cells was studied by MTT assay. Apoptosis was detected by Hoechest 33258 staining and Annexin V/PI double staining assay. The expression of NF-κB and IκBα was observed by Western blot and confocal microscopy. The results showed that triptolide inactivated NF-κB apoptotic pathway in human multiple myeloma RPMI-8226 cells. Triptolide at nM range induced proliferation inhibition in a dose- and time-dependent manner and apoptosis in a dose-dependent fashion in RPMI-8226 cells. Besides, we observed the inhibition of NF-κB /p65 in the nuclear fraction was correlated with the increase in the protein expression of IκBα in the cytosol. These results suggested that triptolide might exhibit its strong anti-tumor effects via inactivation of NF-κB/p65 and IκBα.

Humans ; Minimally Invasive Surgical Procedures ; utilization