BACKGROUND:There is often space between implant and bone during immediate implantation.Whether biological membrane is needed to guide bone regeneration remains poorly understood.OBJECTIVE:To createdifferent sizes of space between femurand implantsindogs and to observe the effects of biological membrane on bone regeneration capacity of bone defects surrounding implants.DESIGN,TIME AND SETTING:A self-control animal experiment was performed at the Laboratory Animal Center,Norman Bethune College of Medicine,Jilin University and School of Stomatology,Jilin University between March and December 2005.MATERIALS:BLB hydroxyapatite-coated implant was provided by Beijing Leiden Biomaterial Co.,Ltd.,China;BME-10X collagen membrane was purchased from Fujian Better Biotechnology Co..Ltd.,China.METHODS:BLB implants were installed in the bilateral proximal femoral bone to create standard gradient bone defects with horizontal width 3 mm.vertical depth 5 mm,and horizontal lengths of 0,1,2,3,and 4 mm Bone defects on the left femur were sutured directly and those on the right femur were covered with biological membrane prior to suture.All animals were sacrificed at 3 months after surgery.Specimens containing implants were harvested to prepare tissue blocks for radiological observation.MAIN OUTCOME MEASURES:The quantity,color,and texture of newly formed bone surrounding implants were observed from the surface and profile levels.The implant-bone integration and new bone formation were also examined by soft X-ray photography.RESULTS:Grossobservation results revealed that when the horizontal length of bone defect was 3 mm or less,there was no significant differenee in bone density between the newly formed bone and the host bone no matter whether biological membrane existed or not;when the horizontal length of bone defect was 4 mm the bone density was better when biological membranes were used than not.Soft X-ray photography results revealed that when the horizontal length ofbone defect was 3 mm or less.no significant difference in bone density and bone trabecular morphology and orientating was found between newly formed bone and host bone no matter whether biological membrane was used or not;in the 4-mm-length bone defect areas.implants contacted with newly formed bone directly,but the calcified degree ofnewly formed bone was poor,bone trabecula was thin,and bone trabecular course was irregular,nevertheless,the calcified degree of newly formed bone was better under the condition of being with biological membrane than without biological membrane.CONCLUSION:Biological membrane exhibits strong capacity to promote the regeneration and repair of bone defect tissue with a horizontal length of 3 mm or less,and plays an important role in repatr of large sizes of bone detect

Objective:To compare the effect of three different titanium alloy surface topographies on the biological character fibro-blasts.Methods:Three different titanium alloy Ti6Al4V surface topographies were created by machining(M),direct current electro-chemical etching(DC)and alternating current electrochemical etching(AC)respectively,and standard sized samples were prepared. The surface topographies were observed field emission scanning electron microscopy(FE-SEM).Mouse L929 fibroblasts were cultured on different surfaces.The attachment of cells was examined by acridine orange staining and observed under fluorescent microscope.The proliferation of cells was measured using MTT assay.Results:Tubles with the diamete of 5 -20 μm were observed on the surface of the sample of group DC,and more evenly distributed tubles on that of group AC.Micro-sulci were observed and no microtuble was found on the sample surface of group M.L929 cells were attached on the surface of all the samples in the 3 groups.More adhered and better strached cells were observed on AC treated surface.The proliferation of fibroblasts on AC and DC surfaces was superior to that on M treated surface and at the 3 -5 day the proliferation of fibroblasts on the AC surface was higher than that on DC treated surface.Con-clusion:AC treated surface with the micro-submicro-nano hierarchical topography of titanium alloy has a superior biocompatibility and can promote the early attachment and proliferation of the fibroblasts.

Objective To explore the implementation situation and influencing factors of long-acting reversible contraception (LARC) after receiving post-abortion care (PAC) in artificial abortion women.Methods According to the demographic characteristics and abortion risks,4 068 artificial abortion women in the family planning clinic of our hospital were classified.The LARC implementation situation after receiving PAC was compared among different characteristic populations.The Chi square test was utilized to analyze the statistical significance of the data by SAS software.Results The LARC rate in young women was 7.9%),which was lower than 27.7% in 19-40 years old women and 11.8% in perimenopausal women;the LARC rate in nulliparous women was 10.6%,which was lower than 27.7% in parous women;the LARC rate in high-risk abortion women was 33.1%,which was higher than 16.6% in low-risk abortion women,these data analysis had statistically significant significance (P<0.05).The LARC rate in ≤ 20 years old women among high-risk abortion women,breastfeeding women,delivery women within three months,cesarean section women within six months and more than three times artificial abortion women was low (< 50%).However,the LARC rate in the scar pregnancy women and more than two times cesarean section women was high (> 80%).Conclusion Young women,nulliparous women and postpartum women in high-risk artificial abortion should be ranked the focus group for PAC consulting.

Cell Transformation, Neoplastic ; drug effects ; genetics ; Dimethyl Sulfoxide ; pharmacology ; Electroporation ; methods ; HL-60 Cells ; Humans ; Membrane Proteins ; genetics ; Neoplasm Proteins ; genetics ; RNA Interference ; RNA, Small Interfering ; genetics ; Stromal Interaction Molecule 1 ; Transfection

Alveolar Epithelial Cells ; pathology ; Diagnosis, Differential ; Humans ; Hyperplasia ; diagnostic imaging ; etiology ; metabolism ; pathology ; Lung Diseases ; diagnostic imaging ; etiology ; metabolism ; pathology ; Mucin-1 ; metabolism ; Nuclear Proteins ; metabolism ; Radiography ; Thyroid Nuclear Factor 1 ; Transcription Factors ; metabolism ; Tuberous Sclerosis ; complications ; diagnostic imaging ; metabolism ; pathology

Objective:To determin the effect of PLGA microspheres loading with PTH(1 34)[PTH(1 34)/PLGA]on the differentiation of MC3T3E1 cells.Methods:MC3T3E1 cells were divided into control group,continuous or intermittent PTH(1 34)adminstration groups,PLGA microsphere group and PTH(1 34)/PLGA group.Osteogenesis differentiation was observed by alkaline phosphatase activity(ALP),alizarin red staining and RTPCR.Results:The PTH(1 34)/PLGA with 1 0 -9 mol/L final release concentration enhanced ALP activity and mineralization,increased the mRNA expression of RUNX2,ALP and VEGF.Conclusion:Controlledrelease of PTH(1 34)from PLGA microspheres can promote the osteogenesis differentiation of MC3T3E1 cells.

OBJECTIVEThis preliminary study aims to investigate the effects of titanium and titanium alloy micro-nano-dimensional topography on the biological behavior of osteoblasts in vitro.

METHODSElectrolytic etching (EE) method was used to produce micro-nano dimensional titanium surfaces. The surfaces were observed to determine their effects on the adhesion, proliferation, cell morphology, and alkaline phosphatase (ALP) activity of osteoblasts.

RESULTSThe surfaces of the titanium and titanium alloy groups exhibited higher adhesion and proliferation of osteoblasts than those of the mechanical group. The titanium surface was covered with a group of cells, a large number of filopodia, and functional particles. The ALP activity of the titanium group was significantly higher than that of the titanium alloy and mechanical groups.

CONCLUSIONEE method in pure titanium and titanium alloy surfaces result in bowl-like nests and nanostructures of different diameters and depths. The diameters of the pure titanium and titanium alloy surfaces range from 30 to 50 μm and 5 to 8 μm, respectively. The former is more conducive to promote the proliferation and differentiation of cells.

Alloys ; Cell Differentiation ; Cell Proliferation ; Dental Etching ; Humans ; Nanostructures ; Osteoblasts ; Prostheses and Implants ; Surface Properties ; Titanium

OBJECTIVETo explore the clinical effect of Agkistrodon antithrombogenase (AAT) in the treatment of rheumatoid arthritis (RA) and its possible mechanism.

METHODSBesides the conventional non-steroid anti-inflammatory agents and disease-modifying anti-rheumatic drug, patients were treated supplementally with intravenous injection of AAT. The intracutaneous test showed allergic to AAT patients were treated with Salvia injection and taken as control group. Changes of related clinical indexes in the two groups were observed.

RESULTSAfter 3 weeks treatment, condition of patients in both groups were improved clinically in joint swollen index, joint tenderness index, morning stiffness time, pain assessment (VAS) and health assessment questionnaire (HAQ) on daily life activity as well as ESR level (P < 0.05 or P < 0.01), with the VAS, HAQ and fibrinogen levels more significantly improved than those of control (P < 0.05 or P < 0.01), and the total effective rate higher in the AAT treated group than those in the control group (P < 0.05).

CONCLUSIONAAT has good effect on easing clinical symptoms of RA possibly through anti-inflammation and improving the microcirculation with less toxic and adverse reaction, so is worthy of recommendation.

Adult ; Ancrod ; therapeutic use ; Anti-Inflammatory Agents, Non-Steroidal ; therapeutic use ; Arthritis, Rheumatoid ; drug therapy ; Crotalid Venoms ; therapeutic use ; Female ; Humans ; Male ; Middle Aged ; Retrospective Studies

Objective To investigate insulin resistance and the effect of physical training on it in the pa- tients with chronic heart failure (CHF). Methods One hundred and twenty NYHAⅡ-ⅢCHF patients were ran- domly divided into a training group( n = 65 ) and a routine therapy group (n = 55 ). Another 35 healthy subjects were recruited as control group. All the patients were treated with routine anti-CHF drugs, and the training group patients had received physical training twice a day in addition. The HOMA-IR, insulin sensitivity index (ISI) , left ventricu- lar ejection fraction (LEVF), left ventricular fractional shortening( LVFS), 6-minute walking distance, heart rate and mean blood pressure were compared between the training and routine therapy groups before and after physical ex- ercise in both groups, and a comparison was made between the patients and the controls before the intervention with regard to HOMA-IR and ISI. Results Comparing with control group, ISI was reduced while the HOMA-IR in- creased (P

WRKY transcription factors are novel transcriptional regulatory factors, which play an important role in regulating plant development, metabolism and other physiological processes. In this study, a new Dendrobium officinale WRKY transcription factor, designated as DoWRKY1 was cloned by using RT-PCR and RACE (GenBank Accession No. KF953910). Bioinformatic analysis demonstrated that, the full-length cDNA of DoWRKY1 was 1,704 bp. And DoWRKY1 contained a 1,629 bp open reading frame (ORF) that encoding a peptide of 542 amino acid residues. The putative DoWRKY1 protein contained two conserved WRKY domains and it belonged to the group I WRKY family protein. Yeast one-hybrid experiment showed that DoWRKY1 had transcriptional activation ability in yeast, and it could activate the expression of downstream report genes (His3 and Ade2). Semi-quantitative RT-PCR experiment showed that DoWRKY1 expressed in roots, stems, leaves and protocorm-like bodies. Real-time qRT-PCR proved that DoWRKY1 could be induced by methyl jasmonate (MeJA) and chitosan (Chitosan), and the expression level of this gene can reach the expression peak at 2 h and 1 h, respectively. These results are useful for further determination of the regulation function of this gene in secondary metabolism of D. officinale.
Cloning, Molecular ; Dendrobium ; genetics ; Gene Expression Regulation, Plant ; Plant Proteins ; genetics ; Transcription Factors ; genetics