Objective　To explore the effect of the psychological intervention on the treatment of dental anxiety (DA).Methods Measured with Corah's dental anxiety scale , 316DA patients were selected from department of dentistry and were divided into two groups: the intervention group and the control group . The psychological intervention as well as regular dental therapeutics were applied to the patients in the intervention group , whereas only regular dental therapeutics were used to those in the control group.Results　The patients had a lower clinical dental anxiety in the intervention group , significantly different from that of the control group ( P＜ 0.01). After the treatment , more patients in the intervention group had a slower pulse than those in the control group and fewer had a faster pulse .The results also showed that the psychological intervention had a better curative effect on male patients than female ( P＜0.05). Conclusion　The psychological intervention was efficient to patients with dental anxiety.

Objective To investigate the effect of geldanamycin(GA) on the expression of HSP(HSP90,HSP70,HSP27) and oncoprotein(mutant p53,CDK4) in human breast cancer cell line MDA-MB-435s.Methods Proliferation of MDA-MB-435s cells was measured with MTT assay.The mRNA expression levels of HSP90,HSP70 and HSP27 were detected by RT-PCR.The protein expression levels of HSP90,HSP70,HSP27,mutant p53 and CDK4 were detected by Western blot.Results GA inhibited the proliferation of MDA-MB-435s cells in a time-dose dependent manner.The expression level of mRNA and protein of HSP90,HSP70 and HSP27 were increased,and the increasing of HSP70 was the most significant,while the protein expression level of mutant p53 and CDK4 in MDA-MB-435s cells were reduced obviously after 48-hour treatment with 400 nmol/L GA as compared with that of control cells.Conclusion GA inhibits the proliferation of MDA-MB-435s cells by down-regulating the level of mutant p53 and CDK4 protein,and GA involves in the protection of cell stress through increasing the expression of HSP90,HSP70 and HSP27.

Objective:To study the preventive and therapeutic effects of Acalypha decoction on 2,4,6-trinitrobenzene sulfonic acid induced ulcerative colitis(UC) in rats.Methods: Totally 70 male SD rats were equally randomized into 7 groups, and UC was induced by intrarectal administration of TNBS (125 mg/kg in 50% ethanol). Six hours later the rats were given 3 different doses of Acapha decoction (2.5, 6.5, 9.5 g crude drug/kg body weight) daily for 10 d.Some rats were pretreated with Acalypha decoction (6.5 g crude drug/kg body weight) 3 d before the colitis was induced. Sulfasalazine was used as the standard drug for comparison. The efficacy of Acalypha decoction was assessed through the following parameters: bodyweight loss, diarrhea and bloody stool, macroscopic score,histological changes,and MPO activity in colon tissue. Results: Acalypha decoction treatment(9.5 g/kg, 6.5 g/kg) and prevention administration (6.5 g/kg) significantly inhibited the bodyweight loss and occurrence of diarrhea and rectal bleeding in the rats(P

In inflammatory bowel disease, the experimental model s have been proven to be important tools to investigate the potential therapeuti c agent and to study the mechanism of pathogenesis. Literatures available were r eviewed on the methods of induction, characteristic and availability of all kind s of chemically induced IBD animal models. It would provide some information for selection of the experimental model in pharmacology and pathogenesis study.

BACKGROUND:Great saphenous vein is the most common vascular material in coronary artery bypass grafting, however, the graft neointimal hyperplasia and subsequent atherosclerosis result in angiostegnosis, which affect the long-term efficacy. OBJECTIVE: To analyze the pathophysiology and mechanism of the angiostenosis, additionally, to construct smooth muscle cell specific SM22a promoter and SMHC enhancer. METHODS: The database of PubMed, HighWire and CNKI were retrieved with key words of "SM22α promoter, SMHC enhancer, stenosis, Pi3k and RNAi/RNA interference". The language was confined to English and Chinese. The literatures correlated with angiostenosis, VSMC-specific SM22α promoter and enhancer were selected. The reviews and overlapped researches were excluded. In vascular smooth muscle cell proliferation and apoptosis of graft neointimal hyperplasia, as well as the extent of graft thrombosis were considered as evaluation index. RESULTS AND CONCLUSION: More than 8 730 literatures were searched by the computer. According to inclusion and exclusion criteria, the SM22α promoter and angiostenosis were analyzed. The neointimal hyperplasia and thrombosis had a strong impact on prospective efficacy after coronary artery bypass grafting. The PI3K-Akt-mTOR pathway was a crucial signal passage which regulated cell proliferation and migration. RNA interference targeting Pik3cb can efficiently suppress the neointimal hyperplasia through down regulating the PI3K-Akt-mTOR pathway. The shRNA eukaryon expression plasmid vectors targeting rat Pik3cb were constructed using VSMC-specific SM22α promoter. On the one hand, it can suppress the neointimal hyperplasia, and on the other, it can prevent the occurrence of thrombosis.SM22a is a specific gene in vascular smooth muscle cell. The studies that applied VSMC-specific SM22α promoter/enhancer to vascular grafting provide a new strategy to prevent angiostenosis and thrombosis.

Objective To verify the targeting regulatory relationship between microRNA (miR)-21-5p and mitogen-activated protein kinase kinase 3 (MKK3).Methods miR-21-5p and MKK3 targeted relationship was analyzed by bioinformatics database predict.Constructing MKK3 3'UTR reporter vector (MKK3-3U) and mutation reporter vector (MKK3-3 U-M) was constructed by synthesizing miR-21-5p mimics (mimic),miR-2 1-5p inhibitor (inhibitor),nonsense miR (NC).NC (NC1 group),mimics (mimic1 group),inhibitor (inhibitor1 group) together with MKK3-3U cotransfected human embryonic kidney (HEK293) cells,respectively.Empty vector-pYr-MirTarget (NC2 group),MKK33U (Mt group),M KK3-3U-M (Mut group) together with mimic co-transfected HEK293,respectively.The fluorescence ratio was detected by dual luciferase assay.NC,mimics,inhibitor intervened human renal tubular epithelial (HK-2) cells,respectively.RT-PCR and Western blot were used to test cell MKK3 expression level in HK-2.Results 1.The fluorescence ratios of NC1 group,mimicsl group,and inhibitor1 group were 100.00％,67.99％,133.17％,and there was difference between mimic1 group and NC1 group(t =19.93,P ＜ 0.05).2.The fluorescence ratios of NC2 group,Mt group and Mut group were 100.00％,65.30％,98.48％,and there was difference between Mt group and NC2 group (t =14.39,P ＜ 0.05).There was no significant difference between NC2 and Mut group (t =0.63,P ＞ 0.05).3.MKK3 mRNA relative expression levels of the control group mimic2 group and inhibitor2 group were 1.36 ± 0.02,1.01 ± 0.04,1.43 ± 0.06 ; relative protein expression levels were 0.97 ± 0.05,0.62 ± 0.06,1.36 ± 0.32.MKK3 mRNA and protein levels of mimic2 group were significantly lower compared with the control group (F =85.98,118.26,all P ＜ 0.01).Conclusions MKK3 is the target gene of miR-21-5p.miR-21-5p can regulate the expression of MKK3 both in mRNA and protein levels.miR-21-5p may be an important regulatory molecule in p38 mitogen-activated protein kinase signaling pathway.

The hTERT gene promoter is a tumor-specific promoter, regulated by a number of factors.Modulation of the chromatin structure via DNA methylation or histone acetylation plays an important role in regulating the hTERT promoter. Recent study also found that glycogen synthase kinase -3 cytokines, macrophage colony-stimulating factor receptor 1, bone inducing factor -7, transcription factors c-myc inhibitor, transforming growth factor β, cyclopentenone prostaglandin regulate the activity of hTERT through various pathways. Telomelysin, the telomerase-specific replication competent oncolytic adenovirus, has been used in clinical settings.Various gene therapies based on hTERT are current under-way.

The differentiation of stem cells into target cells in a particular region is an important prerequisite for the organ construction and tissue engineering. The processes are multi-directionally regulated by the surface properties of biomaterials, and among them the influences of mechanical rigidity and surface morphology of biomaterials on morphological characteristics, focal adhesion assemblies, and cytoskeletal structure of cells are considered to be the most important factors in regulating the differentiation of stem cells into specific cell lineages. This review summarizes the progresses on this topic in the past few years, which may provide a reference to the design of the biomaterials in regenerative medicine and tissue engineering.
Biocompatible Materials ; metabolism ; Cell Differentiation ; Cell Lineage ; Humans ; Musculoskeletal System ; cytology ; metabolism ; Regenerative Medicine ; Stem Cells ; cytology ; Surface Properties ; Tissue Engineering

Objective To demonstrate clinical value of surgical repair combined with collateral embolization for tetralogy of Fallot with major aortopulmonary collateral arteries (MAPCAs).Methods The clinical catheterization and surgical data of 8 such patients from October 2004 to May 2008 were analyzed retrospectively.All 8 patients underwent completely surgical repair combined with MAPCAs occlusion.Of 25 collateral arteries,20 were occluded before surgical procedure and 5 small ones were left.Corrective repairs were accomplished under moderate hypothermic cardiopulmonary bypass.Ventricular septal defect was closed with Dacron patch,and all patients underwent non-valved autologous right ventricular outflow tract reconstruction.Results No complications were observed,only 1 patient got hypoxemia.Blood returned to left atrium from lung was decreased.During 6 months follow-up,7 cases were in NYHA class Ⅰ,another was in NYHA class Ⅱ.Conclusions In selective patients with dual pulmonary blood supply by both MAPCAs and native pulmonary arteries,this combined therapy of collateral embolization and surgical repair simplifies copmpleling surgical procedure,improves surgical results and achieves higher rate of one-stage repair.

Objective To explore the effect of three shifts on sleep status of nurses in order to supply evidence for improving the nurses' sleeping quality. Methods 111 three shifts nurses and 117 traditional shifts nurses of 3 grade three A hospitals in Guangzhou were investigated for their sleep condition with self-rating scale of sleep (SRSS), and later the results underwentχ2 test and t test. Results There were 55 three shifts nurses with sleeping factor scores of SRSS≥23 (49.5 %), while there were 72 traditional shifts nurses with sleeping factor scores of SRSS≥23 (61.5 %). Compared with traditional shifts nurses, the total mean scores and factor score of three shifts nurses were better except sleeping time and lack of awakening. It is discovered that great sleeping status differences were found among three shifts nurses and traditional shifts nurses between the age of 20 to 30. Conclusions Three shifts can release the pressure of nurses and can improve the nurses' sleeping status to some degree, especially to the juniority nurses' sleeping status,then the nursing safety can be insured.