Objective To establish a suitable animal model of experimental periodontitis and study the relationship between stress and inflammatory periodontal diseases.Methods Forty Wistar rats with nylon thread placed around the neck of maxillary left second molar tooth were divided randomly into two groups:stress group(the rats were treated with restraint strees for 12 h every day for 10 d)and control group.Four rats of either group were sacrificed at the day of 2,4,6,8,10,separately;the level of blood glucose and the contents of adrenocorticotropic hormone(ACTH),orticosterone and adrenaline were measured as the stress markers,as well as the relative weight of the thymus and spleen.The furcation area of the second maxillary molar was examined histologically and histometrically.Results In stress group,all the markers for stress were significant higher than those in control group,and the thymus and spleen were atrophied(P

Objective To construct the endothelial cell model with overexpressed human protein kinase C ?2(PKC?2) after high glucose inducement in order to study the function of human PKC?2. Methods The PRKCB1 gene was amplified from pMD18-T-PRKCB1 plasmid and then directly cloned into shuttle plasmid pDC315 to construct shuttle plasmid. Then the recombinant shuttle plasmid and adenovirus genomic plasmid pBHGlox△E1,3Cre were cotransfected into 293 cells to construct recombinant adenovirus Ad-PRKCB1. The virus titer was calculated by TCID50. The Ad-PRKCB1 was verified by immunocytochemistry and RT-PCR. Ad-PRKCB1 was transfected into human umbilical vein endothelial cells (HUVECs) followed by the treatment of high glucose (25 mmol/L) for 96 h, and then the cells were observed by laser scanning confocal microscopy (LSCM). Results Restrictive endonuclease digestion and PCR result showed that the target gene was correctly cloned into shuttle plasmid. Cytopathic effect (CPE) was observed under inverted microscope through homologous recombination. The virus titer was 7.9?109 IU/ml. Immunocytochemical staining and RT-PCR indicated the expression of human PKC?2 in the transfected HUVECs. The translocation was observed under LSCM. Conclusion A recombinant adenovirus vector with human PKC?2 and the endothelial cell model with human PKC?2 overexpression by high glucose are constructed successfully.

AIM: To understand the relationship between pentanucleotide repeat(PNR) polymorphism of the apolipoprotein(a) gene and lipoprotein natures of normal Han population. METHODS: The serum levels of TG, TC, LDL-C,HDL-C, apo AI, apo B and Lp(a) were measured and the polymorphism of the apo(a) PNR was studied by using PCR-SSCP in 153 random normal individuals in Hubei Han population respectively. RESULTS: The relative frequencies of apo(a) PNR allele were significantly different from western population. The apo(a) gene which copy number of PNR is 5 was associated with high Lp(a) levels. No marked differences in the levels of TG, TC,LDL-C, HDL-C, apo AI and apo B were found among the various genotype groups of apo(a) PNR in Hubei Han. CONCLUSION: The data of lipids and PNR polymorphism of the apo(a) gene from healthy Hubei Han were obtained. The apo(a) allele with 5(TTTTA)-repeats may be related to high serum Lp(a) levels in the Hubei Han population.

Objective To investigate the relationship between the gene polymorphism of the inducible costimulatory molecules (ICOS),CD_(28),CD_(24) and susceptibility to multiple sclerosis(MS). Methods 83 patients with MS and 110 controls selected from healthy individuals and hospital staff in Chinese Han people with non-autoimmune diseases were studied by detecting genotype of the 3 genes using PCR-RFLP method. Results The frequency of ICOS-2394 TT genotypes was significantly higher in MS patients than in controls (MS 33.7%vs controls 10.9%, P

Objective To establish a gene diagnosis assay for spinal muscular atrophy(SMA) in children. Method Analysis of the survival motor neuron (SMN) gene in 19 SMA patients and in 21 normal controls were performed by using polymerase chain reaction - fragment length polymorphism (PCR - RFLP) method. Result Deletion of exon 7and 8 in SMNt gene were found in all 19 SMA patients, while no such changes were found in normal controls. Conclusion The SMNt gene exon 7 and 8 examine can be applied to SMA gene diagnosis, and the PCR- RFLP method have higher sensitivity and particularity to the SMA diagnosis.

0.05).Again,compared with NG group,the protein expression of PKC? in HUVECs was up-regulated,the cytosol/nuclei ratio of PKC? was decreased,cell cycle was blocked in G0/G1 phase,the apoptosis increased significantly,and the protein content of p-FOXO1(S256) and P27kip1 increased(P

Objective To investigate the effects of stress associated with nicotine on experimental periodontal breakdown of ligature-induced periodontitis in rats.Methods Forty male Wistar rats with the neck of left maxillary second molar ligated by nylon were used.The animals were randomly divided into four groups:Ni group,0.7 mg of nicotine?kg-1?d-1 (intraperitoneal); S group,stress (immobilization-12 h?d-1); Ni+S group,stress (immobilization-12 h?d-1) associated with an intraperitoneal injection of 0.7 mg of nicotine?kg-1?d-1; C group:saline solution. Two rats of each group were sacrificed at the day of 2,4,6,8,10 separately and the furcation areas of the second maxillary molars were examined histologically and histometrically.Results Intergroup analysis revealed a higher bone loss rate in the animals of Ni+S group compared with the other three groups,the absorption rate of alveolar bone at the day of 6,8,10 in experimental groups were higher than that in C group (P

Objective To explore the mechanism of insulin resistance regulated by fibroblast growth factor 21 (FGF21)and identify its role in oxidative stress.Methods High-fat diet-induced obese mice were treated with FGF21 ,and hepatic oxidative stress markers such as iNOS and insulin signaling molecules such as IRS-1 and Akt were assessed by Western blot and co-immunoprecipitation.Meanwhile,liver steatosis was assessed in liver sections stained with oil red O.Results Obese mice in FGF21 group showed reduced body weight,blood glucose and serum insulin levels,and improved insulin sensitivity as measured by glucose tolerance testing (GTT)and insulin tolerance testing (ITT)compared with obese mice in vehicle group.Meanwhile,FGF21 treatment in obese mice decreased protein expressions of iNOS and TNF-α,and increased insulin-stimulated IRS-1 tyrosine phosphorylation and Akt Ser-473 phosphorylation,indicating that FGF21 inhibited hepatic oxidative stress and restored impaired insulin signaling.Additionally,we found significantly reduced lipid accumulation in liver sections stained with oil red O in FGF21-treated obese mice.Conclusion Our results support the notion that FGF21 is an important regulator of insulin resistance and that FGF21 may reduce lipid accumulation in the liver,restore hepatic insulin signaling and improve insulin sensitivity in obese mice,at least in part,by inhibiting hepatic oxidative stress.Therefore,FGF21 has a potential value in clinical application.

Objectives To learn about current public health education for undergraduate clinical students and to provide some references for developing suitable teaching way in the further.Methods Public health education for undergraduate clinical students in 11 medical colleges and universities and teachers' opinions on it were surveyed with the self-made questionnaire.Quantitative data were analyzed with descriptive statistic method.Results All the surveyed colleges and universities opened public health curriculum for undergraduate clinical students and 10 colleges and universities made public health course to be compulsory.The teaching contents were varied in different colleges and universities.Teachers who gave the public health courses proposed some suggestions on its reform.Conclusions Public health education for clinical students in different colleges and universities has both unity and diversity.It should develop new teaching model based on the training goal of public health education for undergraduate clinical students.

In this study,we summarized the results from the retrospective investigation on endemic situation of schistosomia-sis that was implemented in nine provinces(autonomous region),China in 2009,demonstrated the role of these retrospective in-vestigations in accelerating the progress of schistosomiasis control in China,and clarified the great significance of the investiga-tion for summarizing the experiences for the control of schistosomiasis,and analyzing the changing patterns and affecting factors of endemic status of schistosomiasis in China. In addition,these retrospective investigations provide reliable evidence for revis-ing the Criteria of Schistosomiasis Control and Elimination,and for the more accurate and scientific assessment of the effec-tiveness of schistosomiasis control in China.