Tissue engineering has been a newly developed discipline which represents the new direction of biological medicine engineering.With evergrowing researches on the reparation of bone defect by tissue engineering,great success has been achieved in this field.The three important elements of bone tissue engineering are seed cells,cytokines and cellular biological scaffolds.Bioceramic is an important part of bioactive frame applied widely in tissue engineering.This paper presents a review of the application of bioceramic in the reparation of bone defect,which aims at promoting a systematic knowledge of the application of bioceramic in tissue engineering.

Objective: To study the effect of antidepressant in treatment of patients with PSD (post-stroke depression) Method: 121 patients with PSD in their rehabilitation period were stratified by results of HAMD and then randomly divided into two groups, the study group (n=64) received Paroxetine 20 mg daily, the control group (n=57) received placebo After 4 months, the result was assessed with HAMD, CSS and ADL (activity of daily living) Result: In the period of rehabilitation of stroke, the degree of neurological impairment (CSS score) was positively correlated to depression (r=0 99, P

Objective In this study,we investigate the influence on nurses professional ability by the hierarchical level training under the advanced mode.Methods By referring to advanced mode of clinical expertise,combined with impacts including the ability of nurses,seniority factors,professional titles and educational background,1 527 nurses of our hospital were divided into five ranks (including nine grades).We developed training plan,training forms and training purposes aiming at all level of training objectives.In addition,we developed a training effect questionnaire and promotion criteria.All the nurses must be evaluated and compared with the traditional nursing mode,which contained 1 486 nurses as the control.Results Within two years after the start of the experiment in the observation group,1 106 nurses had been promoted.Compared with the traditional platform-based training model,nursing assessment indicators were significantly improved by the hierarchical level of training.Quality control of care services was significantly improved and the score of patient satisfaction was significantly increased.Nurses acceptance of tiered training was improved compared to the control group,published research papers were significantly increased.Conclusions Detailed training on the layer classification of the nurses can improve the ability of nurses including specialist knowledge,interpersonal communication and humanistic care,teaching,scientific research,management and other professional skills,so as to improve nursing quality and work efficiency.

BACKGROUND:It is an important issue of alveolar ridge preservation after tooth extraction. Because of the limited treatment and geographical conditions, lack of awareness of oral health, many local people in frontier areas in Xinjiang have poor alveolar ridge that is not of timely repair after tooth extraction. Thus, it is important to find a suitable local and efficient way to save the residual ridge, which has a more practical clinical value. OBJECTIVE:To investigate the feasibility of nano-colagen artificial bone used for alveolar ridge preservation in the Kazakh in Xinjiang Tacheng Region, China. METHODS: Sixty-eight Kazakh patients with bilateral extraction from Tacheng region, Xingjiang Uygur Autonomous Region, China were selected in a self-controled trial. According to the principle of a minimum alocation imbalance index, the experimental side and control side of extraction patients were confirmed. In the experimental side, nano-colagen artificial bone was implanted; while, conventional treatment was done in the control side. Multi-slice spiral CT was used to scan the regions of extraction interest to measure the relative gray value of alveolar bone mineral density immediately and 3 months after implantation. RESULTS AND CONCLUSION:Immediately after implantation, tooth extraction sockets were visible on CT images both in the experimental and control sides; but after 3 months, the extraction sockets became unclear on the CT images, and CT values were close to those of the surrounding alveolar process, but bone tissues were ful of the bone graft area in the experimental side. The alveolar bone mineral density was higher in the experimental side than the control side at 3 months after implantation. These findings indicate that the nano-colagen artificial bone has good clinical achievement in alveolar ridge preservation in the Kazakh in Xinjiang Tacheng Region.

Objective To investigate the inhibitory effects of docosahexaenoic acid (DHA)and 5-fluorouracil (5-FU)in combination on human gastric cancer cell line AGS in vitro .Methods Human gastric cancer line AGS was treated with different concentrations of DHA and 5-FU alone or in combination.The inhibition of cell proliferation was evaluated by MTT assay.Dose of median (IC50 )of drugs (alone or in combination)and the combination index (CI)were calculated using the median-effect equation and the combination index equation of Chou-Talalay.Flow cytometry was used to detect the cell cycle distribution.The expression of mitochondrial respiratory membrane protein complex in AGS cells was analyzed with Western blot.Results DHA and 5-FU alone or in combination could markedly suppress the proliferation of AGS in significantly time-dependent and dose-dependent manners (P <0.05).IC50 values with DHA or 5-FU administered for 24 h and 48 h were 5 1.60 μg/mL (DHA:24 h),34.82 μg/mL (DHA:48 h),45.90 μg/mL (5-FU:24 h),and 1 6.86 μg/mL (5-FU:48 h), respectively.DHA remarkably strengthened the inhibitory effect of 5-FU and decreased IC50 of 5-FU by 3.56 -2.1 5 folds.The combination of DHA and 5-FU showed synergism.Flow cytometry showed that AGS cells treated with DHA and 5-FU were arrested in G0/G1 phase and the proportion of AGS cells in G0/G1 phase increased compared with that in the control group,DHA group and 5-FU group,while the proportion of the cells in S phase decreased significantly (P < 0.05 ).Western blot showed after treatment with DHA and 5-FU for 48 h,the expression of mitochondrial respiratory membrane protein complex was significantly decreased compared with control group,DHA group and 5-FU group (P <0.05).Conclusion DHA could act synergistically with 5-FU in inhibiting the growth of gastric carcinoma cells,and meanwhile decrease the dose of 5-FU.The mechanism may be associated with cell cycle arrest in G0/G1 phase and interference in the energy metabolism of AGS cells due to inhibition of the expression of mitochondrial oxidative respiratory chain complexes by the two compounds.

Objective To study the effect of down-regulation of E-cadherin on the invasion ability of tumor cells.Methods Human pancreatic carcinoma cell line JHP-1 was treated with E-cadherin antisense oligodeoxynucleotied(ASODN).The immunocytochemistry,Western blot were used to detect the expression and the contents of(E-cadherin) in the tumor cells,and the invasive ability of tumor cells were evaluated by invasive-MTT assay.Results Treated with E-cadherin ASODN,the expression of E-cadherin on JHP-1 cells were reduced,and the protein contents were decreased as well compared with control groups and ODN group.The invasive ability of JHP-1 cells to the basement membrane was increased(P

Objective To investigate the occurrence, prevention and management of surgical complication of contralateral C7 nerve root transfer through the prespinal route to repair the brachial plexus nerve root avulsion injury. Methods From Feb. 2002 to Aug. 2009, 425 patients were performed the contralateral C7 nerve root transfer through the prespinal route with this procedure. There were 379 males and 46 females,with the average age of 21 years (range, 3 months to 56 years). The contralateral C7 nerve root was sectioned at the distal of the middle trunk in 15 cases, at the distal of the anterior and posterior division in 410 patients. The surgical complications related to the health C7 nerve root section and the make of tunnel through the prespinal route and others were analyzed retrospectively. Results The incidence rate of complication was 5.2%(22/425). The surgical complications related to the make of prespinal route including 2 cases had the severe bleeding during the operation because of vertebral artery injury; transitory laryrecurrent nerve palsy occurred in 5 cases, the pain and numbness occurred on the donor upper limber in 4 cases when the patients swallowed. The complications related to the section of contralateral C7 nerve root including the extension of finger and thumb was dysfunction in 5 patients after the operation, 3 cases had the severely pain on the health upper limber, Horner's sign occurred on donor side in 2 children suffered birth palsy, and C6 nerve root was mistaken sectioned as C7 in 1 case. Other serious perioperative complication including the thromboses of the cerebral trunk occurred in 1 case 42 hours postoperative and died in hospital 38 days after the operation. Conclusion The procedure of contralateral C7 nerve root transfer through the prespinal route is safe. The effective method to prevent this complication occurrence is to expose the origin segment of vertebral artery when making prespinal route.

Objective To analysis and compare the proteomic differences between neural stem cells and motor neurons in embryonic spinal cord in rat and discover the key different proteins. Methods Separating the protein of cells by the 2-D fluorescence difference gel electrophoresis, and to analyse the differences of protein expression with DeCyder software, and to identify with high performance liquid chromatography-electrospray tandem mass spectrometry. Results About 1 300 protein spots from the cells were gained after gel analysis. Eighty-seven protein spots were selected for mass spectrometry analysis. Fourty-four differently expressed proteins (24 in neural stem cells and 20 in motor neurons) were identified by mass spectrometry analysis.Conclusion Differently expressed proteins between neural stem cells and motor neurons were identified and it is helpful to find the new targets in neural stem cells differentiation into motor neurons.

Objective To investigate the effect of β-elemene on SGC7901 gastric cancer cell line and the potential proteins involved. Methods Human SGC7901 gastric cancer cells were treated with different concentrations ofβ-elemene.Cell viability was assessed.A proteomic method,isobaric tags for relative and absolute quantitation (iTRAQ),was employed to detect the proteins altered by β-elemene.Protein expression was validated by Western blot.Results β-elemene inhibited the viability of SGC7901 gastric cancer cells in a dose-dependent manner.Altogether,147 upregulated proteins and 86 downregulated proteins were identified in response to β-elemene treatment in SGC7901 gastric cancer cell line.Among them,the expressions of p21-activated protein kinase-interacting protein 1 (PAK1IP1 ),Bcl-2-associated transcription factor 1 (BTF)and topoisomerase 2-alpha (TOPIIα)were validated by Western blot and the trends were consistent with iTRAQ results.Top pathways involved inβ-elemene treatment in SGC7901 gastric cancer cell line included ribosome signaling,peroxisome proliferator-activated receptors (PPARs)signaling pathway,regulation of actin cytoskeleton,phagosome,biosynthesis and metabolism of some amino acids.Conclusion Our results suggest a promising therapeutic role of β-elemene for gastric cancer.The differentially expressed proteins give us better insights into the potential mechanisms involved in gastric cancer treatment using β-elemene.

Objective To compare the effects of different extracts of Rheum palmatum on weight and tissue structure of hypothalamusand and pituitary of adult female rats,and screen the main reproductive toxicity extract.Methods The water,chloroform,ethyl acetate,and n-butanol extracts and water-soluble substance of R.palmatum were prepared by polarity gradient extraction method.Female adult rats were randomly divided into blank control group,rhubarb water extract group,and different extracts groups.The dosage of all the groups was equivalent to 4.00 g/kg crude rhubarb.Rats were administered with extracts by gavage for 60 d.Body mass growth rate of rats were calculated before and after administration.The pathological changes of hypothalamic arcuate nucleus neurons and pituitary gonadal cell were observed with light microscope.Results Compared with the blank control group,the body mass growth rate of rhubarb water extract group was decreased (P ＜ 0.05),while those in the different extracts groups were increased (P ＜ 0.01);The hypothalamic arcuate nucleus neurons of rhubarb water extract group showed chromatin marginalization,nissl substance dissolving,fuzzy boundary of nuclear membrane,as well as hell cells,and the total number of adenohypophysis cells reduced and the cells arranged in irregular.However,there were no apparent pathologic changes in different extracts groups.Conclusion Rhubarb water extract administration by long-term dose can reduce weight growth rate and result in pathologic changes of hypothalamic arcuate nucleus and adenohypophysis,while the different extracts can increase weight growth rate significantly and have little effects on the organizational structure ofhypothalamic arcuate nucleus and adenohypophysis.