Objective To investigate the biocompatibility of pure titanium (Ti) and Ti-6Al-7Nb surface treated by sanding acid etch (SLA) on rat osteoblasts. Methods Experiments were divided into four groups, Ti mechanical grinding group (S1 group), Ti sand-blasting acid group (SLA1 group), Ti-6Al-7Nb mechanical grinding group (S2 group) and Ti-6Al-7Nb sand-blasting acid group (SLA2 group). The surface topography of samples was examined by microscope. The contact angle measurement instrument was used to analyse surface hydrophily of SLA1 and SLA2 groups. The surface sediment mor?phology and phase were observed by scanning electron microscopy (SEM) and X-ray diffraction (XRD) in two groups after be?ing soaked into simulated body fluid (SBF) for 7 d,14 d and 21 d. Osteoblasts extracted from rats were seeded on titanium sheets, and the osteoblast cells on different titanium surfaces were observed by inverted microscope. MTT colorimetric meth?od was used to measure the proliferation of osteoblasts. Results Compared with S1 and S2 groups, there were more holes on sample surface of SLA1 and SLA2 groups. The sample surface was hydrophilic structure in SLA1 and SLA2 groups. The con?tact angle was smaller in SLA2 group than that of SLA1 group. The hydroxyapatite coating was firstly observed in SLA2 group at 14 d. The hydroxyapatite coating was found in samples of two groups after 21 d. The proliferative ability of osteo?blasts was stronger in SLA1 and SLA2 groups than that of S1 and S2 groups. And the proliferative ability of osteoblasts was stronger in sample surface of SLA2 group than that of SLA1 group (P<0.05). Conclusion Ti-6Al-7Nb by SLA has good biological compatibility, which is helpful to promote the combination of implant and bone tissue.

Objective To explore the clinical features of diabetic macular edema (DME) with optical coherence tomography (OCT) and correlation with visual function. Methods Forty-nine eyes from 40 patients with DME (DME group) and 31 eyes from 31 patients without DME (control group) were examined with OCT,pattern reversal visual evoked potentials (P-VEP),macular perimetry. According to proliferative diabetic retinopathy (PDR), 49 eyes with DME were divided into group A (without PDR, 30eyes) and group B (with PDR, 19 eyes). Results The retinal macular thickness of central fovea in DME group [(299.25±63.87)μm] was more than that in contol group [(204.35 ± 37.94)μm], visual acuity and macular visual field in DME group were significantly different than those in control group, respectively (P ＜ 0.05). The retinal macular thickness of central fovea,visual acuity and visual field were no significant differences between group A and group B (P＞0.05). OCT macular thickness and visual correlation coefficient was -0.437(P＜ 0.05 ); OCT macular thickness and mean defect correlation coefficient was 0.441(P ＜ 0.05). Conclusions OCT can provide a useful tool for monitoring the occurrence and development of DME, can assess the response to treatment. With increasing of the macular retinal thickness, the visual acuity and macular visual field of visual function are more damaged.

Objective To evaluate the effect of total alkaloids of Sophora alopecuroides L on the nervous behavior and the expression of neurotransmitters in rats. Methods 48 male SD rats were randomly divided into 4 groups:blank group,total alkaloids of Sophora alopecuroides L treatment with 4 mg·kg-1 ·d-1 ( low dose group) ,8 mg·kg-1 ·d-1( medium dose group) and 16 mg·kg-1 ·d-1( high dose group) groups. After successive intragastric administration for 30 days,the locomotor activity was applied to test the nervous behavior and emotional state of rats in each group. After behavioral tests were finished,the contents of trypto-phan (Trp),5-hydroxytryptophan (5-HTP),5-serotonin (5-HT),5-hydroxyindoleacetic acid (5-HIAA), norepinephrine (NE),epinephrine (E) and dopamine (DA) were detected by ELISA in serum and brain. Results In the experiment of locomotor activity,compared with blank group ((95.33±12.75) times),the numbers of horizontal movement of Sophora alopecuroides L in medium and high dose group ( ( 61. 64 ± 5.91),(64.62±5.79)times both P<0.05) were significantly reduced (P<0.05, P<0.01).Compared with the blank group ((4.33±0.66) times),the numbers of vertical motion of Sophora alopecuroides L in medium and high dose group ((3.05±0.09)times,(3.77±0.69)times) were significantly reduced (P<0.05, P<0.01). Compared with blank group ((2.25±0.39) number),the granule number in high dose group ((3.38±0.40) number) were significantly increased (P<0.05, P<0.01),and emotional stress degree increased. Meanwhile,compared with blank group,the content detection of 5-HT,5-HIAA in different dose groups of the total alkaloids of Sophora alopecuroides L was improved obviously(P<0.01),but there was no significant effect on the content of Trp,5-HTP,NE,E,DA(P>0.05). Correlation analysis indicated that the degree of au-tonomic activity in rats with the content of 5-HT,5-HIAA and DA in serum was negatively correlated (P<0.05, P<0.01) ,the degree of emotional stress and the content of 5-HT,5-HIAA in brain was negatively cor-related (P<0.05, P<0.01) . Conclusion The total alkaloids of Sophora alopecuroides L can reduce the ac-tivity of rats and increase the degree of emotional stress. And the mechanism may be correlated with the in-creasing level of 5-HT and 5-HIAA in serum and brain.

Objective To investigate the application of real-time gray-scale contrast enhanced ultrasound (CEUS)imaging in the diagnosis of fallopian tube obstruction.Methods Forty-six females with infertility in the period of 3-7 days after menses were inspected by transvaginal CEUS,and the transmission of contrast agents in the fallopian tubes was observed.Then they were inspected by routine iodic X-ray salpingography.Later the value of real-time gray-scale CEUS in diagnosis of fallopian tube was evaluated.Results The sensitivity of CEUS indiagnosis of fallopian tubal unobstruction,obstruction and open without freely was 92.0%,87.1%,36.4%respectively;the specificity was 85.7%,96.7%,93.7%;the accurate was 89.1%,93.5%,84.7%;the Kappa was 0.78,0.85,0.16 with X-ray salpingography.The concordance was 83.7% between CEUS and X-ray salpingography.Conclusions There were no significant difference between CEUS and X-ray salpingography in diagnosis of fallopian tube unobstruction or obstruction,and the former method is safer and more convenient that is suitable to become an valuable method in inspecting of infertility.

BACKGROUND: Previous study demonstrated that hypoxia preconditioning promoted mesenchymal stem cells survival and their therapeutic efficacy, and this effect was mediated by hypoxia induced factor-1α (HIF-1α). However, specific downstream mechanism remained unclear. OBJECTIVE: To observe the influence of hypoxia preconditioning on the survival and vascularization potential of bone marrow mesenchymal stem cells in vitro and explore the regulatory mechanism of HIF-1α/MALAT1/VEGFA pathway. METHODS: Bone marrow mesenchymal stem cells were obtained and cultured in vitro. Cells were divided into hypoxia (1% O2) and normoxia control groups (20% O2), and cultured for 24 hours. Cells proliferation, apoptosis and vascularization were evaluated. The expression of HIF-1α, MALAT1, and VEGFA was detected. HIF-1α and MALAT1 were inhibited by their siRNAs separately. HIF-1α siRNA scramble and MALAT1 siRNA scramble were used as negative controls before hypoxia preconditioning. Alterations of the molecules were examined and compared in different groups. RESULTS AND CONCLUSION: (1) Compared with the normoxia control group, cell viability was significantly enhanced; and cell apoptosis percentage was significantly declined in the hypoxia group; vascular lumen like structure was also increased significantly in the hypoxia group (P < 0.01); expression of HIF-1α, MALAT1, and VEGFA was significantly increased in the hypoxia group (P < 0.01). (2) After the inhibition of HIF-1α and hypoxia preconditioning, both MALAT1 and VEGFA expression levels were significantly reduced (P < 0.01). The expression of VEGFA was also significantly suppressed after the blockage of MALAT1 (P < 0.01). (3) This study suggested that hypoxia preconditioning effectively promoted bone marrow mesenchymal stem cell survival and vascularization through the activation of HIF-1α/MALAT1/VEGFA pathway.

AIM:To explore the influences of semaphorin 3A (Sema 3A) on hydrogen peroxide (H2O2)-induced injury in human umbilical vein endothelial cells (HUVECs).METHODS:Sema 3A over-expression vectors were constructed and transfected into the HUVECs by Lipofectamine 2000, and the over-expression effect was verified by qPCR and Western blot.The HUVECs in different groups were treated with or without 200 μmol/L H2O2 for 4 h.The levels of inflammatory cytokines were measured by qPCR.The levels of lactic dehydrogenase (LDH), superoxide dismutase (SOD) and malondialdehyde (MDA) were detected by corresponding colorimetry.The cell viability was measured by MTT assay.The cell apoptosis was analyzed by flow cytometry.The levels of apoptosis-related proteins cleaved caspase-3 and Bcl-2 were determined by Western blot.RESULTS:H2O2 induced inflammatory cytokine secretion, increased the levels of LDH and MDA, decreased SOD activity and cell viability, and increased cell apoptosis in the HUVECs.Over-expression of Sema 3A enhanced the above processes.No injury effect of Sema 3A over-expression on HUVECs without H2O2 treatment was observed, indicating that the injury effects of Sema 3A on HUVECs depended on H2O2.CONCLUSION:Sema 3A markedly enhances H2O2-induced injury in the HUVECs, which depends on H2O2.Sema 3A may promote oxidative stress-caused endothelial cell injury.

Objective To investigate the effect of problem-based center quality improvement management model on nursing of patients with femoral neck fractures .Methods From February 2011 to November 2013 , 78 cases of femoral neck fracture patients received routine nursing as control group .Problem-based center quality improvement management team was set up , and the nursing management model of patients with femoral neck fractures was structured , then, 86 patients with femoral neck fractures from March to September in 2013 as observation group received the improved nursing .Results After the study , hip function excellent rates in observation group was higher than that in control group , and the difference was statistically significant (86.05%vs 71.80%;χ2 =4.106,P <0.05).The incidence rates of deep venous thrombosis , pressure sores, pulmonary infection, urinary tract infection and constipation in observation group were 4.65%, 5.81%,3.49%,1.16%,2.33%,respectively,while that in control group were 10.26%,17.95%,11.54%, 21.79%,12.82%, and the differences were statistically significant (χ2 =3.722,5.217,4.831,7.205,4.902, respectively;P<0.05).Conclusions The model of problem-based center quality improvement management can significantly improve the patients'hip function, reduce complications , which is worthy of wider promotion and application .

Objective To detect and explore the expression and clinical significance of dual specificity tyrosine phosphorylation regulated kinase1b (Dyrk1b) in the specimens and cells of cervical lesions. Methods (1)All the data were collected from 75 patients with cervical cancer and 52 cases with squamous intraepithelial lesion(SIL)admitted in the First Affiliated Hospital of Dalian Medical College during Jan. 2011 to Dec. 2013 and confirmed by pathological examination, included 60 cases of stageⅠand 15 cases of stageⅡ, 12 cases with low-grade squamous intraepithelial lesion(LSIL)and 40 cases with high-grade squamous intraepithelial lesion(HSIL). While, 28 cases with chronic cervicitis were chosen as the control group. The protein expression of Dyrk1b was detected by immunohistochemistry among the four groups.(2)The expression of Dyrk1b in HeLa and SiHa cells were detected by western blot method and the expression of Dyrk1b protein were also detected after treatment of AZ191 (5, 10 μmol/L) for 48 hours in HeLa and SiHa cells.(3)The cellular survival and proliferation of HeLa and SiHa cells treated by different concentrations of AZ191(2.5, 5, 10, 25, 50, 100 μmol/L)for 48 hours were detected by methyl thiazolyl tetrazolium (MTT) assay.(4)The rate of apoptosis of HeLa and SiHa cells was detected by flowcytometry after treatment of AZ191 (5, 10μmol/L) for 48 hours. Results (1)The positive rates of Dyrk1b protein in chronic cervicitis, LSIL, HSIL and cervical squamous cancer by immunohistochemistry were 11%(3/28), 1/12, 42%(17/40)and 71%(53/75), respectively. The expression of Dyrk1b in cervical squamous cancer and HISL were higher than those in LSIL and chronic cervicitis (P<0.01), there were significant difference between cervical squamous cancer and HSIL, or between HSIL and LSIL(all P<0.05), while there were not significant difference between LSIL and chronic cervicitis(P>0.05). Expression of Dyrk1b was correlated with stromal invasion depth of cervical cancer (P<0.05), but not with age, clinical stage, lymph node metastasis, and serum squamous cell carcinom antigen(SCC-Ag)levels (all P>0.05). (2) Dyrk1b protein was expressed in different levels in HeLa and SiHa cells, and the expression of Dyrk1b was decreased gradually as the increased of the concentration of AZ191 in both HeLa and SiHa cells by treatment of AZ191 for 48 hours. (3) Different concentration of AZ191 treated on cervical cancer cells could inhibit the cellular proliferation and induce cell apoptosis in a concentration-dependent manner(P<0.01), concomitant to the decreased cell survival rate. The apoptosis rate of HeLa and SiHa were increased significantly after 10μmol/L AZ191-treatment for 48 hours, but no any difference induced by 5 μmol/L AZ191-treatment compared to control group. Also,there was no any difference between Hela and SiHa cells in either inhibitory effect or apoptosis rate induced by AZ191. Conclusions Dyrk1b is over-expressed in either specimens or cells of cervical cancer. The expression of Dyrk1b protein in cervical lesions is increased as the progression of disease. Dyrk1b inhibitor AZ191 could inhibit cellular proliferation and induce apoptosis in a concentration-dependent manner in cervical cancer cells.

Seventy patients with advanced non-small-cell lung cancer (NSCLC) aged 65 or above were treated with epidermal growth factor receptor tyrosine kinase inhibitor (EGFR-TKI) erlotinib or gefitinib from February 2006 to September 2010. The efficacy and toxicities of treatment were retrospectively analyzed.The overall response rate and disease control rate were 31.4％ and 84.3％,respectively. Themedian progression-free survival time and median survival time were 8.0 months and 13.5 months,respectively(P ＜ 0.05 ). One-year survival rate was 54.3％. Response rate ( CR + PR) ( 42.9％ ) anddisease control rate (94.3％ )in female patients were superior to males (20.0％ and 74.3％ ) (P ＜ 0.05 ).Non-smoking and PS score ＜ 2 were good predictors for survival.The side effects were generally mild and mainly were skin rash and diarrhea.

The hypoxia-inducible factor is a significant regulator of adaptive transcriptional response in hypoxia or hypoxia. Hypoxia-inducible factor (hypoXIA-inducible factor) loses its activity after hydroxylation by proline hydroxylase in a normoxic environment. Proline hydroxylase inhibitor is a kind of new small molecule oral preparation by inhibiting the proline hydroxylase, reducing the degradation of HIF, activating the hypoxia-induced way, adjusting including stimulates erythropoiesis, iron absorption and mobilization, angiogenesis, lipid, and glucose metabolism, inflammation, energy metabolism, cell growth and differentiation, and other physiological reaction, Showed more clinical benefits. In recent years, the application of proline hydroxylase inhibitors in the field of renal anemia has achieved apparent efficacy, and the research in the field of ischemic heart disease has also made significant progress in the future in the treatment of ischemic heart disease and other aspects of good application prospects.