Objective To explore the effect of recombined Human epidermal growth factor (rhEG) combined with alprostadilon Wnt/β-Catenin signal pathway in rats with diabetic ulcer. Methods Rats with diabetic ulcer were randomly divided into four groups :control group ,rhEG group ,epidermal group and combined treatment group. Ulcer skin was smeared by normalsaline in control group ,and by rhEG in rhEG group. Epidermal was administered from caudal vein in epidermal group.Combined treatment group was treated by rhEG and epidermal at the same time. The healing status were observed. The proteinand mRNA expression of Wnt-1 ,β-Catenin and GSK-3β were measured 14 days after treatment. Results The healing rates in combined treatment group were (9.76 ± 2.37 )% ,(35.74 ± 3.65 )% ,(51.37 ± 4.16)% and (84.42 ± 5.35 )% respectivelyin 6th , 10th and 14th day after treatment , which were significantly higher than in rhEG group and epidermal group (P<0.05). The mRNA levels of Wnt-1 ,β-Catenin and GSK-3βin combined treatment group were (1.42 ± 0.19) ,(1.56 ± 0.21) and (0.95 ± 0.15) after treatment for 14 days ,which were significantly higher than in rhEG group and epidermal group (P<0.05). Protein levels of Wnt-1 ,β-Catenin and GSK-3βin combined treatment group were (1.17 ± 0.16) , (1.38 ± 0.18 ) and (0.81 ± 0.13 ) after treatment for 14 days ,which were significantly higher than in rhEG group and epidermal group ( P < 0.05 ). Conclusion rhEG combined with epidermal can significantly accelerate the healing of diabetic ulcer ,and can regulatethe Wnt/β-Catenin signal pathway by increasing the expression of Wnt-1 ,β-Catenin and GSK-3β.

This paper explores the existing gene doping problems of athletes in bioethical aspect,describes the development of gene doping,and points out that strengthening the anti-doping education,further improving legal system and strengthening an effective supervision and anti-doping research are main focus of anti-doping work currently.

Objective To investigate the transportation of chemico-biological particles(CBP) through the micropassage inside the human body in order to improve chemico-biological protection.Methods Dissipative particle dynamics (DPD) method was used to study CBP transportation through micropassages inside the human body.Results The Poiseuille flow could be ensured by imposing boundary conditions including pressure gradient and no-slip.The axial velocity between fluid particles and CBPs was well matched except the area close to the passage wall.However, CBPs tended to accumulate and the density of CBPs slightly increased, leading to the jam effect and producing particle accumulation.Conclusion The characteristic of CBP transportation is better understood,which can help develop some chemico-biological protection devices according to movement of CBPs and improve the performance of CBPs during chemico-biological protection.

Objective NKT cells are very important as a kind of non-specific immune cells. Much attention in antitumor significance has been received in the study of its effect on malignant diseases. The aim of this study was to detect the expression of NKT cells and its CD+8 NKT subsets in peripheral blood of esophageal patients and normal person, and to analyze the changes in the expression of NKG2D and NKG2A receptorsand its clinical pathological factors. Methods By flow cytometric analysis, 53 patients with esophageal carcinoma and 39 normal controls were analysed for peripheral blood of NKT cells and CD+8 NKT subsets, and the expression of NKT cells NKG2A and expression of NKG2D receptor. The clinical pathological factors were collected for the comparative analysis. Results Compared with the normal control group, the expression of NKT cells in peripheral blood of esophageal patients increased [(4.32±0.73) %, (5.97±1.29) %] (t =3.562, P <0.01), and the expression level of its surface receptor NKG2D reduced [(17.56±5.92) %, (15.12±1.56) %] (t =3.892, P <0.05), but the express levels of NKG2A [(4.02±1.41) %, (5.99±4.59) %] in creased (r = 4.015, P <0.05), those expression change with the development of the esophageal cancer. Conclusion The increased expression of NKT cells and CD+8 NKT subsets in the peripheral blood of patients with esophageal carcinoma refletcs that the immune feedback of patients' antineoplastic effect is strengthened. The decresed expression of the active receptor NKG2D and the increased expression of the inhibitory receptor NKG2A on NKT cells might be one of mechanisms leading to the reduction of NKT cell activity and immune escape of patients with esophageal carcinoma. The changes of surface receptors of NKT cells may be associated with the development of the esophageal cancer.

Objective To study characteristics and immune mechanisms of CD11b+ GR-1-myeloid-derived suppressor cells (CD11b+ GR 1+ MDSCs) in elderly mice,as compared with those of healthy young mice.Methods Totally 20 healthy C57BL/6 young mice (aged 1-2 months) and 20 elderly mice (aged over 18 months) were randomly chosen and splenetic CD11b+ GR-1+ MDSCs were sorted with the MDSCs Isolation Kit.In vitro assays,the effects of young and elderly CD1 1b+ GR 1+ MDSCs on the proliferation of T cells were determined by Brdu Elisa.Transwell co-culture and real-timePCR were used to identify the mechanisms of different immune suppressive functions of CD11b+GR 1+ MDSCs sorted from young mice and elderly mice.Results Compared with young MDSCs,elderly MDSCs could evidently suppress the proliferation of T cells (t=8.67,P＜0.001),and this function could be reversed by trans-well co-culture (t=6.93,P＜0.001).The results of realtime PCR revealed that,compared with young MDSCs,elderly MDSCs expressed higher levels of arginase-1 (ARG-1),inducible nitric oxide synthase (iNOS),reactive oxygen species (ROS),interleukin 10 (IL-10),IL13 and transforming growth factor (TGF)-β (t=9.04,4.86,7.04,6.92,4.51,5.46,respectively,P＜0.05 or P＜0.01).Conclusions CD11b+GR-1+MDSCs sorted from healthy elderly mice can evidently suppress the proliferation of T cells through cell-cell contact and secretion of suppressive medium.

Objective To investigate the changes in cerebral hemodynamics in different body positions in healthy volunteers.Methods Sixty right-handed healthy male volunteers,aged 22-26,height 167-178 cm,weighing 51-67 kg,were randomly divided into 4 groups ( n =15 each): 15 degrees head-down tilt group (group Ⅰ ),30 degrees head-down tilt group (group Ⅱ ),15 degrees head-up tilt group (group Ⅲ) and 30 degrees head-up tilt group (group Ⅳ ).Blood flow signals of right middle cerebral artery (MCA) and extracranial internal carotid artery (EICA) were detected by transcranial Doppler and systolic blood flow velocity (Vs),diastolic blood flow velocity (Vd ),mean blood flow velocity (Vm),pulsatility index (PI) and resistance index (RI) were recorded at supine position (baseline),immediately,10 and 30 min after body position change(T1-3 ).Lindegaard index was calculated.Results Compared with the baseline,in group [Ⅱ Lindegaard index was increased at T2,while Vs and Vm of MCA were decreased at T2,3,in group Ⅳ Vs of MCA and PI of EICA at T2,Vd and Vm of MCA at T2,3 were decreased ( P ＜ 0.05),while there was no significant difference in the variables mentioned above in the other two groups ( P ＞ 0.05 ).Conclusion In healthy adults,cerebral blood flow velocity decreases in 30 degrees headdown and head-up tilt positions,however there is no change in cerebral blood flow velocity in 15 degrees headdown and head-up tilt positions.

Objective To investigate the effect of adenovirus-bone morphogenic protein 9 ( Ad-BMP9 ) on osteogenic differentiation of immortalized calvarial mesenchymal progenitor cells ( iCALs ) .Methods iCALs were infected with adenoviral vectors encoding BMP-9 or green fluorescent protein ( GFP) and the early osteogenic differentiation was assessed by detecting alkaline phosphatase (ALP) activity after being cultured for 3, 5 and 7 days.14 days after infection, alizarin red S staining was performed to study the formation of osteogenic calcium nodules .The expression of osteogenic marker genes Runx2 and OCN was assessed by quantitative real-time ( RT )-PCR and Western blotting .Results Significant increases in ALP activity and in the expressions of Runx 2 and OCN were detected in BMP-9 treated iCALs compared with GFP-treated cells(P<0.05).Meanwhile, alizarin red S staining showed that more mineralized nodules were found in the BMP-9 induced group .Conclusion BMP-9 can promote the osteogenic differentiation of iCALs .

To introduce the method, content and the benefit of constituting inspection tour quality bulletin system and as- sessing the inspection tour computer capability grade of the quarter inspection tour of computer repair and maintenance outsourcing service. By improving the computer routine inspection tour in practice, we can enhance the integrated benefit of the computer quarter inspection tour. As an effective approach of the network equipment preventive repair and mainte- nance, after the computer quarter inspection tour system was optimized and improved, it got the end-users and hospital or- ganization' high attention and full affirmation for the good integrated benefit.

Objective To investigate the level of subpopulations of myeloid-derived suppressor cells (MDSCs) in elderly tumor-bearing mice versus elderly tumor-free mice,and to study the difference in immune suppressive functions between different subpopulations and their mechanisms.Methods A total of 20 healthy C57BL/6 elderly mice(aged 18-20 months) were randomly chosen to establish Lewis lung cancer models.The amount of monocytic-MDSCs (MO-MDSCs) and polymorphonuclear granulocytic-MDSCs(PMN-MDSCs) in tumor-free and tumor-bearing elderly mice was evaluated by using flow cytometry.MO-MDSCs and PMN-MDSCs were separated with Magnetic-Activated Cell Sorting (MACS) MicroBeads and their morphological characteristics were observed after May-Grunwald-Giemsa staining.The effects of MO-MDSCs and PMN-MDSCs on the proliferation of T cells were determined by Brdu-enzyme-linked immunosorbent assay(ELISA).And the immune suppressive mediators secreted by the subpopulations were detected by Real-time polymerase chain reaction(PCR).Results Compared to the tumor-free group,the proportion of MO-MDSCs in the spleen of tumorbearing group were increased [(12.44± 1.20) ％ vs.(38.42±3.66) ％,t=5.67,P＜0.001],while PMN-MDSCs were not [(10.34±0.68) ％ vs.(12.18±1.27) ％,t=2.21,P=0.09].The result of Brdu-ELISA showed that MO-MDSCs could suppress the proliferation of T cells [(0.30 ± 0.18) vs.(3.38±0.96),t=8.33,P＜0.001],while PMN MDSCs could not [(2.69±0.45)vs.(3.38±0.96),t =1.72,P=0.11].The result of PCR showed that as compared with PMN-MDSCs,Mo-MDSCs had the increased expression levels of arginase-1 (ARG-1),inducible nitric oxide synthase (iNOS),interleukin-10 (IL-10),interferon-γ(IFN-γ) (t =4.31,8.89,1.70,3.13,respectively,P ＜ 0.01 or 0.05),while the expression levels of interleukin-13 (IL-13),transforming growth factor-β(TGF-β) had no differences (t=4.94 and 2.75,P =0.39 and0.47).Conclusions MO-MDSCs are significantly increased in elderly Lewis lung cancer mice models.MO-MDSCs could mediate lung tumor evasion by suppressing the proliferation of T cells through highly expressing ARG-1,iNOS,IL-10 and IFN-γ.

AIM: To investigate the effects of human urotensin II (hUII) on ischemia/reperfusion (I/R) injury in isolated rat hearts. METHODS: In the ischemia/reperfusion (I/R) model of isolated perfused rat hearts,the effects of hUII pretreatment on cardiac function was monitored with cardiac function software of MFL Lab200. ATP,total calcium,and malondialdehyde (MDA) content in myocardium were detected. The coronary perfusion flow (CPF) and lactate dehydrogenase (LDH) activity in coronary effluent were measured during reperfusion. RESULTS: In the hUII pretreated group,the release of LDH from myocardium was lower [(78.3?18.1)U/L] than I/R group [(109.3?23.9) U/L,P