Objective:To investigate the role of mTOR in regulation of ICOS expression in human blood regulatory T cells. Methods:Isolation of Treg cells from human PBMC using MACS beads. We detected the ICOS expression on purified Treg cells and Treg cells viability using flow cytometry in anti-CD3 plus anti-CD28 ( antibody or beads) or anti-CD3 plus ICOSL-Fc for 3 days and 7 days. CFSE labeling human PBMC cells and in vitro cultured Treg mixed, Treg contact inhibition activity was detected by flow analysis. Results:After in vitro stimulation of Treg cells in the presence of anti-CD3+anti-CD28 for 3 days, there was no significant statistic difference in viability between ICOS+(92. 00±2. 69)% and ICOS-(90. 30±3. 53)% Treg-cells. After cultured for 7 days,the decreased ICOS+ Treg cells percentage within total Treg cells from ( 40. 20 ± 1. 83 )% to ( 11. 60 ± 1. 10 )% compared with that of 3 days. Further more,the ICOS expression level between stimulated with anti-CD28 or ICOSL-Fc condition group,compared with the ICOS MFI in the condition of anti-CD3 plus anti-CD28 treatment for 3 days was (2410. 0±746. 4) obviously higher than (403. 30±74. 42), that of the group treated with anti-CD3 plus ICOSL-FC. Rapamycin could partially suppress Treg cells ICOS expression,but unaffected the Treg suppression ability. Conclusion:ICOS expression level may not important for in vitro cultured human PBMC Treg cells survival although mTOR signling is important for regulation ICOS expression on in-vitro cultured Treg cells,but the ICOS expression on Treg regulated by multiply signaling pathways. CD28 signaling is the key stimulation factor for ICOS upregulation on in-vitro cultured Treg cells compared to ICOSL signaling.

Objective To study the inhibitory effects of pigment epithelium derived factor (PEDF) on oxygen-induced retinal neovascularization in mice,and to investigate the possible involvement of interleukin-1β (IL-1β) in the neovascular-inhibitory function of PEDF.Methods A total of 140 postnatal day (P)7 C57BL/6 mice were randomly divided into normal control group,oxygen-induced retinopathy (OIR) model group,PEDF treatment group and PBS treatment control group.All mice except normal control group with their mothers were exposed to (75 ± 2)％ oxygen environment for 5 days and then kept in room air for another 5 days to establish the OIR model.Mice in normal control group were kept in room air only.At P12 and P14,respectively,mice in PEDF treatment group received intravitreous injections of 1 μl PEDF (2 μg/μl),while PBS treatment control group received the same volume of PBS (10 mmol/L,pH7.4).All mice were euthanized at P17 and eyes were isolated.The changes of retinal vessels were observed on retinal flat mounts and cryosections by fluorescence microscopy.Retinal specimens were prepared for IL-1β protein and mRNA analysis by Western blot and real time fluorescence quantitative reverse transcription-polymerase chain reaction (Real-time RT-PCR).Results Changes of retinal vessels had been viewed by fluorescence microscopy on flat-mounted retina,the relative retinal neovascularization areas were significantly increased in OIR model group compared with normal control group (t =15.02,P＜0.01),and the relative retinal neovascularization areas were obviously smaller in PEDF treatment group than those in PBS treatment control group (t=5.96,P＜0.01).Fluorescence staining revealed that retinal vascular tufts were extending from outer plexiform layer (OPL) to ganglion cell layer (GCL) of the retina along with multiple interconnections; Neovascular tufts in OIR model group and PBS treatment control group were presenting distinctly more than those of normal control group and PEDF treatment group.The specific expression levels of IL-1β protein in retinas of OIR mice by Western blot analysis were higher than those of normal control group(t=3.35,P＜0.05),While these of PEDF treatment group showed a considerable decline in comparison with PBS treatment control group (P＜0.01),and there were no difference in normal control group and PEDF-treated group (F=11.764,P＞0.05).Similarly,expression levels of IL-1β mRNA tested by Real-time RT-PCR were obviously increased in the OIR model group when compared to normal control group(t =4.43,P ＜ 0.01).After treated with PEDF,expression levels of IL-1β mRNA showed a considerable decrease when compared to PBS treatment control group (P ＜ 0.01),and there were no difference in normal control group and PEDF-treated group (F=11.15,P＞0.05).Conclusions PEDF can inhibit oxygen-induced retinal neovascularization.The mechanism may be related to that PEDF can downregulate the expression of IL 1β in retina.

Objective To observe the in vitro damage to hairs by Trichophyton mentagrophytes and Microsporum canis using light microscopy and scanning electron microscopy ( SEM ), and to compare the differences in the duration needed for the two fungi to damage hairs in different age groups. Methods We collected healthy hairs from different age groups, and performed hair perforation test in vitro. The damage to the hairs was observed by SEM and light microscopy. Results Both T. mentagrophytes and M. canis could damage the hairs. The duration needed for T. mentagrophytes to damage the hairs was significantly shorter than that for M. canis in all age groups ( P

Objectives To summarize and analyze the characteristics ofspina bifida occulta in prenatal ultrasound scan in order to improve the accuracy of diagnosis.Methods Sixteen singleton pregnant women with fetal spina bifida occulta who were diagnosed in the Ultrasonography Department of Dalian Maternal and Child Health Hospital from January 2014 to April 2015,were enrolled in this study.Diagnosis was made based upon the abnormalities found in the spinal column of fetus during routine ultrasound scan,followed by a close examination on the fetal spinal column and the position of conus medullaris by using multiple scan.Descriptive analysis was used to summarize the characteristics of spina bifida occulta in ultrasonic images.Results Among the 16 cases,12 had subcutaneous mass (nine cases had follicle-like anechoic mass and three cases had masses with strong echoes).The other four cases without subcutaneous mass manifested signs of disappeared physiological curvatures or disordered arrangement of spinal column,angulation deformity or scoliosis,or asymmetry in ossification centers of spinal column on both sides of lesions and lowered position of conus medullaris.Lemon shaped head and banana shaped cerebellum were seen in one case,while the other 15 cases were found no cerebral abnormalities.Eight cases had tethered cord (the position of conus medullaris was lower than the second lumber vertebra),six cases had unclear position of conus medullaris and the other two were normal.Diagnoses for all of the 16 cases were confirmed by MRI after delivery or autopsy or neonatal operation.Conclusions Abnormalities such as subcutaneous mass and tethered cord observed in prenatal ultrasound scan are significant indicators for suspected closed spinal dysraphism and further multiple scan is required to confirm the diagnosis.

Objective To investigate the adverse effects of nano-titanium dioxide (TiO2 )on kidney tissues in healthy rats and rats with oxidative stress (OS).Methods Thirty-six healthy male SD rats were randomly divided into control group, alloxan-treated group, nano-TiO2 treated (NM) group, and alloxan and nano-TiO2 dual treatment (OS-NM)group.Nano-TiO2 of three concentrations (0.5,5 and 50 mg/kg body weight)was injected intraperitoneally.The level of OS biochemical factors and blood urea nitrogen (BUN)and pathological changes of kidney were determined.Results Compared with those in NM and OS groups,the levels of O2 -· and superoxide dismutase (SOD)in OS-NM group were significantly increased after exposure to nano-TiO2 of 5 mg/kg body weight (P <0.05).Nano-TiO2 of 50 mg/kg body weight led to significant changes of O2 -·,SOD,and glutathione (GSH) levels in OS-NM group in comparison with OS and NM groups (P <0.01).The levels of O2 -· and GSH between OS group and NM group changed significantly (P < 0.05 ).Compared with healthy rats,OS rats showed significant increased BUN level (P <0.01),cell number and edema of renal tubular epithelial cells after nano-TiO2 exposure.A synergic effect between OS condition and nano-TiO2 level was shown on the increased level of O2 -·.Conclusion Nano-TiO2 induced more adverse effects on the kidney in OS rats,suggesting a synergistic effect between nano-TiO2 and OS.This result provides experimental evidence for patients’safe use of nano-TiO2 .

OBJECTIVE To study and find reasonable methods of nursing care of incision through analyzing the risk factors in liver transplant patients.METHODS A total of 416 liver transplantation operations in our hospital from Sep 2004 to May 2006 were evaluated.The risk factors that resulted in the incision infection were considered.RESULTS The incision infection rate was decreased from 13.9% to 4.3% after improvement.CONCLUSIONS Nursing care is of great significance in preventing the incision infection in liver transplant patients.

ObjectiveTo investigate the effects and indication of intermittent catheterization(IC) by relative safe bladder capacity(RSBC) to treat vesical-ureteral reflux(VUR).MethodsThere were 23 male complete SCI patients, aged between 7～45 years, including 15 patients without vesicao-ureteral reflux injuried 1～3 months as control group, 3 patients in mild group affected only ureter, and 5 patients in severe group affected not only ureter but also the pelvis. All the patients were taken intermittent catheterrization according to their own RSBC companied with supersonic device. The times of IC per day is that the average total urine volume one day was divided by RSBC. The observation time is over 2 years. During the oberservation some medicine was used to enlarge some patients bladder capacity.ResultsThere were no reflux in the control group; the reflux in the mild group improved a lot, some even disappeared, and there were no change in the severe group.ConclusionIC by RSBC is effective to prevent and cure vesical-ureteral reflux in some SCI patients.

Objective: To study the related factors of radiation induced lung injury(RILI) after three-dimensional conformal radiotherapy(3D-CRT) in the elderly patients with advance esophageal cancer, thus to provide reference for radiotherapy planning. Methods: The clinical data and physical parameters of 72 elderly patients with advance esophageal cancer were analyzed, including gender, age, performance status scoring, smoking history, tumor location, T staging, underlying disease of the lung, radiation dose, the whole lung accepted 5 Gy exposure volume(V5), V10, V15, V20, V25, V30, V40 and mean lung dose(MLD). Results: Among 72 patients, 15 cases developed RILI.It was revealed by univariate analysis that there were statistically significant differences in advanced age, underlying disease of the lung, V5, V10, V15, V20, V25, MLD with RILI(χ²=5.098, P=0.026; χ²=3.598, P=0.030; t=3.854, P=0.034; t=4.901, P=0.022, t=4.638, P=0.029, t=5.122, P=0.015, t=3.652, P=0.041, t=5.760, P=0.010). Conclusion It should be payed more attention to factors such as advanced age, underlying disease of the lung, V5, V10, V15, V20, V25 and MLD when elderly patients with advance esophageal cancer patients were treated with 3D-CRT in order to prevent and decrease the risks of RILI.

OBJECTIVE:To prospectively study the effects of trimetazidine on myocardial remodeling and oxidative stress in patients with hypertensive heart disease (HHD),in order to provide reference for clinical treatment of HHD.METHODS:Eighty-two HHD patients were selected from our hospital during Jan.2014-Jul.2016,and they were divided into control group and observation group by sortition randomization method,with 41 cases in each group.Control group received routine HHD chemical drug (antihypertensive drugs,lipid-lowering drugs,hypoglycemic agents and antiplatelet drugs,etc.) therapy.Observation group was additionally given trimetazidine 20 mg,tid,on the basis of control group.Both groups were treated for 3 months.Before treatment and after 3 months of treatment,SBP,DBP,New York Heart Association (NYHA) cardiac function grade,LVEF,LVESD,LVEDD,LVMI and the levels of GSH-Px,SOD,MDA and ROS were compared between 2 group.The occurrence of ADR was observed in 2 groups.RESULTS:Before treatment,there was no statistical significance in each index between 2 groups (P＞0.05).After 3 months of treatment,SBP and DBP of 2 groups were decreased significantly compared to before treatment (P＜0.01);there was no statistical significance between 2 groups (P＞0.05).There was no statistical significance in NYHA cardiac function grade compared to before treatment or between 2 groups (P＞0.05).LVESD,LVEDD and LVMI of observation group were decreased significantly compared to before treatment (P＜0.05);LVEF was increased significantly compared to before treatment (P＜0.05);LVEDD and LVMI of observation group were significantly lower than control group (P＜0.05).Compared to before treatment,SOD level of control group was decreased significantly,while the levels of GSH-Px and SOD in observation group were increased significantly;MDA and ROS of observation group were significantly lower than those of control group,with statistical significance (P＜0.05).No obvious ADR was found in 2 groups.CONCLUSIONS:Trimetazidine can improve cayocardial remodeling and reduce oxidative stress level of HHD patients with good safety.

Objective To measure and analyze Varian Clinac 21EX accelerator induced radioactivity,and to provide specific recommendations and ways of radiation protection for radiotherapy technicians.Methods To simulate the working environment of radiotherapy technician,and to detect induced radioactivity variation of Varian Clinac 21EX accelerator that induced by 15 MV X-rays under different conditions of beam field area,dose,time,distance and by high energy electron beam (12,16,20 MeV)at the different time.Results The induced radioactivity level was not influenced by different beam field area,and was increased with increasing dose (r =0.930,P ＜ 0.05),decreased with time increase (r =-0.84,P ＜ 0.05),decreased with distance increase(r =-0.975,P ＜ 0.05).The induced radioactivity attenuation levels of the different doses at the same time are different,and have the common characteristic that the induced radioactivity attenuation rate is faster in the initial times.The induced radioactivity levels of high energy electron beams were significantly lower than those of high-energy X-rays.Conclusions During radiotherapy positioning,it is necessary to take measures to protect against the induced radioactivity when high-energy rays with energy greater than 10 MeV will be used.The radiotherapy technician should take the different time and energy interval steps for the different ray type and energy and dose in order to meet the radiation protection principle of optimization.