Objective To study the clinical significance of CD4 + CD25+ Foxp3 + regulatory T cell (Treg) and interleukin 10 (IL-10),transforming growth factor-β1 (TGF-β 1) in patients with steroidresistant asthma (SRA).Methods Seventy-nine patients with asthma were divided into SRA group (31cases) and steroid-sensitive (SSA) group (48 cases).Forty-five healthy subjects were selected simultaneously as control group.CD4+ CD25+ Foxp3 +Treg level was detected by flow cytometry and serum IL-10 and TGF-β1 levels were detected by enzyme-linked immunosorbent assay.Results The percentage of CD4 + CD25 +Foxp3 +Treg in CD4+ T cell and its absolute value in SRA group and SSA group were 0.0225 ± 0.0063,(1.09 ± 0.23) × 107/L and 0.0345 ± 0.0094,(1.35 ± 0.14) × 107/L,they were significandy lower than those in control group [0.0537 ± 0.0128,(2.06 ± 0.27) × 107/L],and SRA group was significandy lower than SSA group,there were statistical differences (P ＜ 0.05).The levels of serum TGF-β1 in SRA group and SSA group were significantly lower than those in control group [(138.12 ± 23.26),(176.25 ± 40.37) ng/L vs.(281.22 ±47.15) ng/L],there was statistical difference (P ＜0.05).The levels of serum IL-10 in SRA group was significantly lower than that in control group [(516.43 ± 86.33)ng/L vs.(763.02 ± 90.19) ng/L],there was statistical difference (P ＜ 0.05).There was no statistical difference in the level of serum IL-10 between SSA group and control group (P ＞ 0.05).The levels of serum IL-10 and TGF-β 1 in SRA group were significantly lower than those in SSA group,there were statistical differences (P ＜ 0.05).The levels of serum IL-10 and TGF-β1 had positive correlation with CD4 + CD25 + Foxp3 +Treg in SRA group and SSA group (P ＜ 0.01).Conclusion The interaction among CD4+ CD25+ Foxp3 +Treg,IL-10 and TGF-β1 may play an important role in the SRA occurrence and development,while by increasing peripheral blood CD4 + CD25 + Foxp3 +Treg number and stabilizing its function can increase IL-10 and TGF-β1 expression,which may be an important way to treat SRA.

PurposeTo investigate the relationship between the serum oxidized low-density lipoprotein (ox-LDL) level and carotid vulnerable plaque in patients with acute cerebral ischemic stroke, and to evaluate the ability of serum ox-LDL in identifying vulnerable carotid plaques.Materials and Methods 181 patients with history of acute cerebral ischemic stroke were recruited. According to the results of carotid ultrasound patients were divided into non plaque group (n=48), stable plaque group (n=38) and vulnerable plaque group (n=95). The serum total cholesterol, triglyceride, high density lipoprotein-cholesterol, low density lipoprotein-cholesterol, fasting plasma glucose and ox-LDL were measured. Carotid intima-medial thickness (CIMT), total carotid plaque area (TPA) and the characters of plaque were examined with color Doppler ultrasound.Results The serum ox-LDL and the number of patients with hypertension in plaque group were significantly higher than that in the non-plaque group (P<0.05). The serum ox-LDL and TPA in the vulnerable plaque group were significantly higher than that in the stable plaque group (P<0.05). Serum ox-LDL in patients with acute cerebral infarction was positively correlated with CIMT, serum total cholesterol and LDL-C (r1=0.154,P<0.05;r2=0.338, P<0.05;r3=0.385,P<0.05). Logistic regression analysis showed that serum ox-LDL was an independent risk factor for carotid vulnerable plaque (OR=1.038, 95%CI 1.008-1.069, P<0.01).Conclusion The serum ox-LDL is independently associated with the formation of vulnerable plaque in patients with acute cerebral infarction. This study suggests that ox-LDL can be used as a biomarker in screening for vulnerable carotid plaque in clinical practice. Carotid ultrasound combined with serology can early identify carotid artery vulnerable plaque that may lead to cerebral ischemic events.

Objective To comparatively study the characteristics of 3 kinds of culture substrates of human odontogenic induced pluripotent stem cells(iPSCs).Methods The human odontogenic iPSCs were cultured by 3 kinds of substrates:mouse embryonic fibroblasts(MEF),matrigel and recombinant human vitronectin(VTN-N).The iPSCs growth situation was compared among three groups.Results The preparation time of these 3 kinds of substrates was 14,3,1 hlespectively,and,the difference was statistically significant (P＜0.05).The iPSCs reprogramming time was (30± 1.6),(26 ± 2.1),(27 ± 1.4) d,lespectively,wht that in the MEF group significantly higer than in other two groups (P＜0.05).The reprogramming efficiencies were 0.3 ％ ± 0.03 ％,0.56 ％ ± 0.08 ％,0.7 ％ ± 0.02 ％ respectively (P＜ 0.05).Three kinds of substrate could better support iPSCs growth and make them to maintain un-differentiation status.Conclusion with no heterologous animal components,and the adrantaga of simple pleparation,oonfrollable standard and shorter gramming time is easy to prepare,the standard is controllable and the reprogramming time is shorter,which is an ideal substrate for supporting iPSCs growth.

Objective To observe the clinical efficacy of relatively proximal humeral locking compression plate( LPHP) with the traditional plate for treatment of proximal humeral fractures .Methods The proximal humeral fractures in patients with 58 cases,the patients were divided into two groups ,the treatment group of 32 cases of locking compression plate in the treatment of T plate ,clover plate in the treatment of 26 patients of the control group received traditional.According to the Neer score compared with two groups of patients with postoperative recovery and compli -cations.Results All the 58 patients for 11 ~15 months of follow-up,the treatment group found no fracture ,fracture nonunion,screw and plate humeral head necrosis ,4 cases of shoulder pain was limited;15 cases of excellent score Neer function,good in 12 cases,5 cases,the excellent and good rate was 84.4%.The control group had 3 cases,2 ca-ses of screw loosening of plate fracture ,3 cases of nonunion ,2 cases of humeral head necrosis ,7 cases of shoulder pain limited.6 cases of excellent score Neer function ,good in 9 cases,3 cases,poor in 8 cases,the excellent and good rate was 57.7%.There was significant differences between the two groups (χ2 =5.113,P <0.05) excellent rate. Conclusion LPHP exact treatment of proximal humeral fractures has fewer complications , which can help patients with early rehabilitation exercises .

Objective To compare the growth characteristics,proliferation and osteo/odontogenic differentiation capability of stem cells from human dental pulp (dental pulp stem cells,DPSCs) and apical papilla (stem cells from apical papilla,SCAP) in vitro.Methods Human dental pulp and apical papilla tissues were separated from impacted third molars of young healthy donors at the age of root development and digested by collagenase type Ⅰ and dispase type Ⅱ to derive primitive DPSCs and SCAP.Cells were then induced for osteo/odontongenic differentiation by medium containing β-glycerophosphate,dexamethasone and KH2PO4.Flow cytometry was utilized to test the expression of specific markers of stem cells,including CD24,CD34,CD45,CD90,CD105,CD146,STRO-1 and OCT-4.AR-S was used to display the mineralization structure and RT-PCR was applied to analyze the expression of bone sialoprotein (BSP),osteocalcin (OCN) and dentine sialophosphoprotein (DSPP).Results Both DPSCs and SCAP were positive for CD90,CD105,CD146,STRO-1 and OCT-4,in percentages varying according to cell type,without expression of CD34 or CD45.Only SCAP expressed CD24 positively.Both cells formed organized mineralization structure after 2 weeks of induction in time-dependent manner,with more mineralization by SCAP and expressed differentiation markers,including BSP,OCN and DSPP.Conclusion Human DPSCs and SCAP possess the characteristics of MSCs and could be differentiated into odontonblast-like cells in vitro.Both cells are approachable stem cell sources for dental tissue engineering.

Objective To comparatively study the features of two reprogramming systems of induced pluripotent stem cells (iPSCs)from human dental origin.Methods Two kinds of reprogramming system,i.e.STEMCCA lentivirus /feed layer and Sen-dai virus /matrigel were used to induce human stem cells from apical papilla(SCAP)into iPSCs,respectively.The induction efficien-cies,workload of generating iPSCs,aneuploidy karyotype ratio,complexities of eliminating exogenous transcription factors and spe-cific markers expression were compared between these two systems.Results The STEMCCA reprogramming system required to prepare the feeder cell MEF.The reprogramming efficiency was 0.1%.Transcription gene-free iPSCs cells were obtained by the Cre-loxp enzyme digestion technique at the later stage.Sendai virus reprogramming system was feeder-free and the preparation of matrigel was quite simple with unified standard.The reprogramming efficiency was 0.7%,which was much higher than that of STEMCCA system(P <0.05).The exogenous virus and transgenes could be gradually eliminated after several passages of natural subclone.Conclusion The Sendai virus/matrigle reprogramming system is much more applicable for the induction of iPSCs from dental origin than the STEMCCA system.

Objective To analyze MRI features of different cervical flexion positions in Hirayama disease (HD) and discuss the effects on these features by different cervical flexion angles.Methods The cervical MR images of neutral and different flexion positions (20°, 25°, 30°, 35° ,40°) of 20 patients, who were clinically diagnosed as HD,were studied.At flexion positions, the appearance of anterior shifting of the posterior wall of the cervical dural canal and widening of epidural space was recorded.The maximum sagittal diameters (d) of widened cervical epidural space and the cervical canal sagittal diameters (D) on the same level were measured to calculate d/D value for quantitative evaluation of the two signs.Comparisons of appearance of the signs among different flexion positions were made using F/sher's exact test.Repeated measures analysis of variance (rmANOVA) was used to compare mean d/D values among groups with different positions, and paired comparisons were also performed.Results The appearance of anterior shifting of the posterior wall of the cervical dural canal were different between 20° group (70%, 14/20) and other 4 larger angles groups (100%) (χ2 =5.76, P=0.020).The d/D values were 0.51±0.06,0.54±0.08,0.57±0.09,0.61±0.09,0.59±0.07 respectively at abovementioned 5 flexion positions, which were different among groups( F = 3.450 ,P = 0.013 ).The value was greater at 35° than that at 20° and 25°( P <0.05 ), and it was also greater at 40° than that at 20° ( P < 0.05 ).Conclusion Cervical flexion angle has an effect on anterior shifting of the posterior wall of the cervical dural canal and widening of epidural space.

Objective To study the effect of bel-2 siRNA on apoptosis of HL-60 cells.Methods bcl-2 siRNA was synthesized in vitro transcription with silencer siRNA construction kit.The synthesized siRNA was transfected into HL-60 cells with Amine siPORT transfection.We used MTT flow cytometer and hoechst 33258 flourescence stainning t0 evaluate cell proliferation and apoptosis. Results.Bcl-2 siRNA could partially inhibit the growth of HL-60 cells.After incubated with bcl-2 siRNAl for 48 hours,HL-60 cells exhibited morphologic characteristic of apoptosis including chromatin condensation,crescents formation and nuclear fragmentation.Conclusion Effective bcl-2 siRNA can induce apoptosis and inhibit cell proliferation.

Objective To study the characteristics and clinical significance of the coronary plaques in patients with benign prostatic hyperplasia (BPH).Methods A total of 91 patients undergoing coronary artery angiography (CAG) were selected and divided into two groups according to with or without BPH,56 cases in BPH group,46 cases in control group.The qualitative and quantitative characteristics of 102 lesions area were analyzed by intravascular ultrosound (IVUS),including external elastic membrane-cross-sectional area (EEM-CSA),minimal lumen area (MLA),plaques area (PA),plaques burden (PB),reference external elastic membrane-cross-sectional area (REEM-CSA),reference minimal lumen area (RMAL),reference plaques area (RPA) and reference plaques burden (RPB).Results IVUS showed a higher rate of area stenosis than did the CAG [(58.2± 7.1)％ vs.(55.9 ± 5.2)％,P＜0.01].BPH group had more soft plaques,eccentric plaques,positive remodeling and less calcified than did the control group (P＜0.05).The MLA and RMAL of BPH group were smaller than those of control group:MAL [(5.61±0.96) mm2 vs.(6.06±0.75) mm2,P＜0.05],RMAL[(9.26±1.05) mm2 vs.(10.02±1.10) mm2,P＜0.05]； while the EEM-CSA,PA,PB,RPA,RPB were larger than those of control group:EEM-CSA[(14.51±1.10)mm2 vs.(13.37±1.02)mm2],PA[(8.90±1.24) mm2 vs.(7.31±1.04) mm2],PB[(61.26±6.53)％ vs.(54.53±5.69)％],RPA[(4.26±1.15) mm2 vs.(3.73±1.33) mm2],RPB [(31.30±8.37) ％ vs.(26.81±8.75) ％,P＜0.05].Conclusions IVUS has a higher value on evaluation of mild to moderate coronary artery stenosis.Evidence of myocardial ischemia in patients with BPH needs further excludeing coronary heart disease.

Objective:To anslysis the hemodynamic states of vertebrobasilar dolichoectasia based on computational fluid dynamics technique.Methods:The original DICOM format image data from a patient with vertebrobasilar dolichoectasia (VBD), were imported by the Mimics software directly,and the 3D Objects were constructed.The simulation of model was made with Ansys software, the hemodynamic pa-rameters such as streamlines, wall shear stress( WSS) and wall pressure were described.Results:There was stable laminar flow in proximal basilar artery and was no blood flow mixed by bilateral vertebral arter-y.However, Spiral flows were appeared in distal tortuous basilar artery.The low WSS regions in the ver-tebra-basilar junction section and inferior segment of basilar artery were coincide with the high wall pres-sure regions.It could be speculated the initial growth regions might be located in the vertebra-basilar junction section and inferior segment of basilar artery.Local regions with low WSS and high wall pressure might be associated with the occurrence and development of VBD.Conclusion: CFD numerical simula-tion maybe can provide a theoretical basis for the role of hemodynamic factors in occurrence and develop-ment of VBD.