The conformity between bone implant and bone tissue plays an important role in osseointegration.Protein molecules such as extracellular matrix proteins,cytoskeletal proteins,and attachment proteins,which produced by osteoblasts,promote the attachment of osteoblasts to bone implant and the surrounding ceils.In vitro studies show that nano-plated implant material bears excellent biocompatibility and superior physical and chemical features.Nano-scale material has the advantage of high surface roughness,wettability and electrochemistry features which erdaance the adherence and interaction of extracellular matrix proteins and promotes the attachmerit,proliferation and differentiation of osteoblasts.The expression of cytokines,such as prostaglandin E2(PGE2)and transforming growth factor-β(TGF-β)are also increased in nano-structured bone implants which in turn promote the new bone formation.Further studies need to be done to explain the mechanism of the effect of nano-tructured bone implant on osteoblasts.

Objective:To localize the impacted maxillary canine and to observe the root resorption of adjacent incisor in 3 dimen-sions using cone beam computed tomography(CBCT).Methods:92 impacted maxillary canines in 63 patients were scanned by CBCT.The three-dimensional images were obtained by multiplanar reconstructions(MPR).The cusp tip of each impacted canine was localized and set to the X,Y and Z planes after the observation of sagittal,coronal and axial views.The root resorption of adjacent in-cisors was observed.Results:In the X-axis,92% of impactions were mesial by 1 0.4 to 1 5.1 mm,8% distal by 2 to 5 mm;in the Z-axis,60% of impactions were palatal by 1 to 4 mm,40% buccal by 0 to 4 mm.41 .3% of the impacted canines were without root resorption of adjacent incisor,36.5% with slight,1 4.3% with moderate and 7.9% with severe root resorption of the adjacent inci-sor.Conclusion:The most frequent location of impacted maxillary canine is palatal and mesial with high incidence of root resorption of adjacent incisor.

Objective To investigate the clinical significance of hepatocyte nuclear factor 4α(HNF4α)in rectal cancer and its relationship with prognosis.Methods Real-time PCR was designed to detect the expression of HNF4αon mRNA level and the immunohistochemistry was used to determine the expression of HNF4αon protein level in rectal cancer tissue.The relationship between HNF4αexpression and clinical characteristics was also analysed.The Kaplan-Meier method was used for univariate analysis and a Cox proportional hazards regression model was performed for multivariate analysis.Results HNF4αwas low expressed both on mRNA (t=6.092,P<0.001)and protein level (χ2 =15.230,P<0.001)in rectal cancer tissue.HNF4αexpression on protein level was related with the clinical stage (χ2 =48.311,P<0.001),depth of invasion (χ2 =23.911,P<0.001),histological differentiation (χ2 =20.787,P<0.001),lymph node metastasis (χ2 =39.064,P<0.001)and distant metastasis (χ2 =5.146,P=0.04),while age and gender were not relevant.The cumulative 3-year overall survival of patients with low HNF4αexpression (43.8%)was much worse than the patients with high HNF4αexpression (95 .5%),and the difference was statistically sig-nificant (P<0.001).Univariate analysis revealed that HNF4αexpression (χ2 =28.778,P<0.001),differ-entiation (χ2 =26.680,P<0.001 ),clinical stage (χ2 =32.702,P<0.001 ),depth of invasion (χ2 =6.226,P=0.013),lymph node invasion (χ2 =15.270,P<0.001)and distant metastasis (χ2 =21.817, P<0.001)were statistically significant worse predictors for rectal cancer,whereas age and gender were not rel-evant.The multivariate Cox proportional hazard analysis revealed that HNF4αlow expression (RR=6.084, P=0.028)was independent prognostic markers for 3-year overall survival in the patients with rectal cancer. Conclusion HNF4αwas closely related to the tumorigenesis and progression of rectal cancer,which is an independent prognostic marker for rectal cancer,and which may be an effective target for the therapy of rectal cancer.

Objective To explore the difference involved in the activation of inflammation pathway and the plasma level of inflammatory factors in the subjects with different sorts of insulin sensitivity. Methods The study was carried out in 38 women, consisting of obesity (n = 22 ) and control (n = 16 ) groups according to body mass index. The insulin sensitivity was assessed by homeostasis model assessment of insulin resistance (HOMAIR). Plasma concentrations of interleukin-6 (II-6) and IL-1β were determined by enzyme immunoassay. Western blot analysis was used to examine total protein expression and phosphorylation levels of IκB kinase (IKK) ,inhibitor of nuclear factor-κB ( IκB ) in peripheral blood leukcocytes. Electrophoretic mobility shift assay (EMSA)was used to detect the binding activity of NFκB. Results The levels of fasting plasma insulin[62.2 ( 20.0-127. 0) pmol/L vs 19. 15 ( 14. 2-47. 8 ) pmol/L, P<0. 01], HOMA-IR[2. 32 ( 0. 76-5.49 ) vs 0.70(0.53-1.7),P<0.0l], HbA1 C[(5.42±0. 45 ) % vs ( 5.08 ±0. 38) %, P<0. 05], triglyceride[( 1.75 ±0. 68 vs 1.22 ±0. 58 )mmol/L, P<0. 05], plasma IL-6[3. 15 (0. 03-22. 2) pg/ml vs 1.26 (0. 74-6.06 ) pg/ml, P<0. 01], and IL-1 β[6. 53 ( 0. 84-36 ) pg/ml vs 3. 16( 1.48-8. 86 ) pg/ml, P<0. 01]in obesity group were significantly higher than those in control group. Compared with control group, the levels of IKKo, IKKβ expression and IκBα serine phosphorylation in obesity group were markedly increased, while the expression of IκBα was significantly reduced. Accompanied with the degradation of IκBα protein, the binding activity of NFκB in obesity group was significantly increased. Conclusions The plasma levels of IL-6 and IL-1β were significantly raised in obesity group. The activation of IKK-IκB-NFκB pathway is closely associated with the genesis and development of insulin resistance in obese subjects.

Objective: To further explore the mechanism by which retinoic acid (RA) promotes the antibody production of cord blood lymphocytes (CBL). [WT5FZ]Methods: The levels of serum vitamin A in cord blood were measured. The expression of retinoic acid receptor ? (RAR ?) gene was determined by RT PCR (reverse transcription polymerase chain reaction). The IgM concentrations in the supernatants of cell culture were measured by ELISA. [WT5FZ]Results: A positive correlation was found between serum vitamin A level and RAR ? expression level in uncultured CBL:r=0.50 (P

[Objective]To investigate the pharmacological mechanism of montelukast in the inhibition of inflammation.[Meth-ods]Respiratory syncytial virus-infected human bronchial epithelial cell(16HBEC)inflammatory cell model was established,and mRNA and protein expressions of Nuclear factor NF-E2 related factor(Nrf2),heme oxygenase(HO-1),quinone oxidoreductase (NQO-1),and glutathione transferase (GST) were determined by qPCR and Western-blot ,and production of cellular reactive oxygen species(ROS)was measured by DCFH-DA fluorescent probe method. Nrf2 siRNA was further synthesized to reduce the expression of Nrf2 ,to investigate the chang of inflammatory index.[Results]Montelukast significantly reduced the expressions of inflammatory cytokines IL-6,TNF-α,and IL-1β(P<0.05)on respiratory syncytial virus-infected 16HBEC,and the ROS level in inflammatory cell model was decreased(P<0.05),increased the mRNA and protein expressions of Nrf2,HO-1,NQO-1 and GST (P < 0.05),with a more significant effect at higher dose. After the down-regulation of Nrf2,the expressions of inflammatory cyto-kines IL-6,TNF-α,and IL-1βwere increased(P<0.05),and ROS level was significantly increased(P<0.05),mRNA and pro-tein expressions of Nrf2,HO-1,NQO-1 and GST were decreased(P<0.05).[Conclusion]Montelukast inhibits the inflammation of human bronchial epithelial cells infected by respiratory syncytial virus (RSV),and the potential mechanism may involve its ef-fect on the Nrf2/ARE signaling pathway.

Objective To evaluate the trimester specific reference ranges and dynamic changes of thyroid functional indicators during gestation of healthy pregnant women.Methods According to the selection criteria,139 cases were selected as the normal pregnant population to establish a self-sequential longitudinal reference range.We collected samples eight times in every case throughout the gestation(including the 8th,12th,16th,20th,28th,36th week of prenatal,the 3rd and the 6th month postpartum) and detected the indicators of thyroid funciton.Meanwhile,301 healthy non-pregnant women of childbearing age were selected as the control group.Results The median of TSH was lowest in the first trimester,and then was increased in the second and third trimesters.The reference ranges of TSH were 0.20-4.01 mIU/L,0.43-3.97 mIU/L,and 0.57-3.96 mIU/L in the above trimesters.The free thyroxine (FT4) level from the 12th week of gestation to the 6th month of postpartum was gradually decreased and was lower than the non-pregnant level.The total thyroxine (TT4) was significantly increased at the 12th week of gestation and thereafter it was stable and returned to normal after childbirth.The free triiodothyronine(FT3) was gradually declined from the 12th week to the 28th week and returned to normal postpartum.Total triiodothyronine(TT3) was significantly increased at the 12th week and thereafter was stable,and returned to normal after childbirth.There was a significant negative correlation between TSH and FT4 in the first trimester(P＜0.01).There was no correlation between TSH and TT4 during the whole gestation.There were positive correlations between FT4 and TT4,FT3 and TT3 since the 12th week of gestation (P ＜ 0.01).Conclusions The gestational specific reference range of TSH based on the selfsequential longitudinal study was narrow,however,the upper limit was still higher than that recommended in foreign guidelines.

ObjectiveTo explore the correlation between IL-6-634C/G gene promoter polymorphism and body mass index (BMI),blood sugar (BS),25-hydroxy vitamin D (25-OH-D),and serum lipid levels by investigating in 8-12-year-old Han children in Shanxi province,China.MethodsIn Datong city of Shanxi province,214 8-12-year-old children were enrolled after obtaining informed consent from their parents.The weight and height were measured and the BMI was calculated.BS,serum lipids,and 25-OH-D were determined.IL-6-634C/G polymorphism were detected by polymerase chain reaction restricted fragment length polymorphism.The effects of genotype on BMI,BS,serum lipids,and 25-OH-D were also studied.ResultsThe genotypes of IL-6-634C/G polymorphism in 214 cases were GG ( 15％ ),GC (40％),and CC (45％).The percentages of C and G allele frequencies were 65％ and35％.The genotypes and allele frequencies showed no gender differences ( P ＞ 0.05 ).However,significantly different GG genotypes frequencies were found between overweight and obese children (38.3％) and other children ( normal weight children: 7.3％ ; thin children: 10.9％ ) (x2 =14.715,P =0.006).Multivariate logistic regression analysis showed that IL-6-634C/G polymorphisms and triglyceride were correlated with overweight and obesity (P ＜ 0.05 ).25-OH-D was not correlated with BMI (r =0.075,P =0.528),BS ( r =0.018,P =0.880 ),triglyceride ( r =- 0.097,P =0.417 ),high density lipoprotein cholesterin ( r =0.038,P =0.751 ),and low density lipoprotein cholesterin ( r =- 0.028,P =0.817 ).25-OH-D was not significantly different between overweight and obesity children.The distribution of three genotypes showed no correlation with 25-OH-D deficiency (x2 =0.622,P =0.733 ).ConclusionsIL-6-634C/G polymorphism exists in Han children in Shanxi province.IL-6 gene 634 GG genetype is a risk factor of childhood overweight and obesity,and may affect lipid metabolism.However,it has no direct impact on glucose metabolism.IL-6 gene 634C/G polymorphism and serum 25-OH-D are not relevant.IL-6 gene 634C/G polymorphism is not related to vitamin D deficiency diseases,and may be not related to bone calcium metabolism.25-OH-D is not relevant with BS and blood lipids level,and also is not associated with childhood overweight and obesity.

Objective To study the association of liver fat content (LFC) with insulin resistance and β cell function. Methods One hundred and nine subjects including 31 cases with impaired glucose regulation (IGR), 31 newly diagnosed type 2 diabetes (NT2DM) and 47 normal controls (NC) with normal metabolic parameters were involved in the study. LFC was measured by 1H magnetic resonance spectroscopy (1H MRS) and the insulin resistance and β cell function were evaluated by oral 75 g glucose tolerance test. Results (1 ) LFCs were3.83% (2.35% ～7.59% ) ,12. 82% (8.10%～21.37%), and 21.99% (11.89%～34.43%), being progressively raised in the respective NC, IGR, NT2DM groups(P<0.01). (2) The subjects were divided into four subgroups according to LFC Quartile: Quartile 1 (LFC<4. 04% ) , Quartile 2(4. 04% ≤LFC<9. 77% ), Quartile 3 (9.77% ≤LFC<20.78% ) ,and Quartile 4( LFC≥20.78% ). Homeostasis model assessment of insulin resistance index (HOMA-IR) values were elevated significantly and progressively starting from Quartile 2(P<0. 01). (3) Insulin from 0 to 30 min ( △I30), the ratio of insulin from 0 to 30 min to glucose from 0 to 30 min ( △I30/ △G30) , C peptide from 0 to 30 min (△CP30) had a trend of increase in Quartile 2,then trended to decrease in Quartile 3. In Quartile 4, △CP30 and △I30/△G30 sharply decreased (P<0.05 or P<0.01). The ratio of C peptide from 0 to 30 min to glucose from 0 to 30 min ( △CP30/△G30) began to decrease from Quartile 3 (P<0. 05). The ratio of area under curve of C peptide to area under curve of glucose (CPAUC/GAUC) was significantly decreased from Quartile 3(P<0.05). From Quartile 3,glucose level became abnormally elevated to impaired fasting glucose and impaired glucose tolerance (P<0.01). (4) LFC was positively correlated with HOMA-IR (rs =0. 618 ,P<0.01), but was negatively correlated with △CP30(rs =-0.282), △CP30/△G30(rs = -0. 404), and CPAUC/GAUC(rs = -0. 308,all P<0.01). (5) Stepwise regression analysis demonstrated that LFC was the strongest predictor of HOMA-IR. Conclusions When LFC accumulated to 4% , insulin resistance occurred and the early phase of insulin secretion was compensatively increased. As the LFC further accumulated to 10% , both the early phase as well as β cell function in whole were deteriorated, and hyperglycemia developed.

Objective To evaluate the clinical effect of intervertional devascularization and surgical devascularization in treatment of patients with upper gastrointestinal hemorrhage .Methods Ninety-nine cases treated with intervertional devaacularization or surgical devascularization were retrospectively studied including 48 cases in intervertional group and 51 cases in surgical group.The postoperative resection, complications and rebleeding time were compared by X2 test and t test between two methods.Results The 12 months, 24 months and 36 months cumulative rebleeding rates after intervertional devascularization were 12.5% (6/47) ,24.5% (11/45), 27.9% (12/43) respectively.The rate after surgical devaacularization were 29.2% (14/48) ,44.7% (21/47), 48.9% (22/45) respectively.There were statistically significant differences between the intervertional and surgical groups (X2=3.843,4.150,4.083, P < 0.05).The complications of intervertional devascularization included fever 85.4% (41/48), bellyache 81.3% (39/48), portalvein thrombosis 4.2% (2/48), intraabdominal hemorrhage 2.1% (1/48), infection 2.1% (1/48) and death 2.1% (1/48).The complications of surgical devaacularization included fever 68.6% (35/51), bellyache 62.7% (32/51), generous hydroperitoneum 25.5% (13/51), portalvein thrombosis 37.3% (19/51), splenic vein thrombosis 11.8% (6/51), hepatic encephalopathy 3.9% (2/51), hepatorenal syndrome 2.0% (1/51), intraabdominal hemorrhage 2.0% (1/51), death 3.9% (2/51) and infection 15.7% (8/51).There were statistically significant differences of fever, bellyache, generous hydroperitoneum, portalvein thrombosis, splenic vein thrombosis between the intervertional and surgical groups(X2=4.174,3.098,16.199,6.011,5.536,14.085,P <0.05).Conclusions The intervertional devascularization procedure is simple, safe and effective method for treating upper gastrointestinal hemorrhage for portal hypertensive.The clinical effect is better than that of surgical devascularization.