Aim To investigate the effects of EDT on anoxia and ischemic injury in cultured PC12 cells. Methods Cultured PC12 cells were treated with 1 mmol?L -1 Na 2S 2O 4 and 20 mmol?L -1 NaCN in combination with glucose deprivation. The protective effects of EDT on these two models were evaluated by lactate dehydrogenate (LDH) efflux assay and colormetric MTT assay.ResultsEDT, within the range of 10 -8～ 10 -6 mol?L -1, significantly antagonized LDH efflux induced by two models and increased the optical density at 570 nm tested by colorimetric MTT assay in concentration-dependent manner. 10 -6 mol?L -1 EDT might time-dependently inhibit two injuries and reach maximal level at 48 h. Conclusion EDT can protect PC12 cells from anoxia and ischemic injury.

The aim of the study was to explore the safety management strategies for homeless persons with psychotic disorders.The following nursing management measures were implemented in 127 psychiatric patients,including precaution of aggression and other accidents,treatment of physical diseases,prevention and control of infectious diseases,intensive managementof key areas,key time and key patients,formulation and implementation of safety management regulations and emergency response system,nurse training on professional diathesis,skills and safety awareness.These measures effectively avoided the risksin psychiatric nursing,reduced nursing errors and ensured patient safety.

[ABSTRACT]AIM:ToinvestigatethepromotingroleofTranswellcontactco-culturesysteminthegrowthand differentiation of single-dissociated induced pluripotent stem cells (iPSCs).METHODS:Bovine corneal endothelial cells (CECs) at passage 1~2 (P1~2) were seeded on the underside of Transwell inserts placed into culture plates and were cultured in 37 ℃and 5%CO2 for 8 h.Accutase digestion and 40μm filter process disaggregated colony-aggregated iPSCs into single-dissociated iPSCs , and the cells were seeded on the inside of Transwell inserts with CECs in medium of mTeSR 1 for 3 d and then in low-glucose DMEM supplemented with 10% FBS for 2 weeks.The characteristics and differentiation markers were evaluated by real-time fluorescence quantitative polymerase chain reaction ( qPCR ) , immunofluorescence staining, live&dead cell staining and alkaline phosphatase (ALP) staining.The group of iPSCs cultured in conventional medium was used as control group 1.The group of single-dissociated iPSCs co-cultured with CECs was set as experimental group, while single-dissociated iPSCs without co-culture were as control group 2.RESULTS: The bovine CECs showed typical hexagonal cobblestone shape .iPSCs showed colony-like growth , while became single-dissociated cells after Tran-swell contact co-culture with bovine CECs for 3 d.The single-dissociated iPSCs positively expressed the undifferentiated markers, Nanog and Oct4.The mRNA expression levels of Nanog , Oct4 and Sox2 between experimental group and control group 1 were both positive and had no statistical significance difference (P>0.05).The dead cells in experimental group decreased significantly, and there was statistically significant difference compared to control group 2 (P<0.01).After 14 d of induced differentiation co-culture , the single-dissociated iPSCs showed rather uniform polygonal morphology , increased dimension and no obvious colony existence .Negative ALP staining, positive immunofluorescence staining for ZO-1, AQP1 and CD31, and negative for CD34 and CD133 were also observed.The results of qPCR showed that the mRNA expression of Oct4, Nanog and Sox2 significantly decreased , and had statistically significant difference compared with control group 1 (P<0.01).CONCLUSION: When co-cultured with bovine CECs, iPSCs morphologically changed to endothelial-like cells and expressed some markers of CECs .Transwell contact co-culture system not only enhances the growth of single-dis-sociated iPSCs , but also promotes their differentiation .

[ ABSTRACT] AIM:To investigate the effect of maxadilan, which specifically activates pituitary adenylate cycla-se-activating polypeptide type I receptor (PAC1 receptor), on the proliferation, apoptosis and differentiation potential of human adipose-derived stem cells ( ASCs) .METHODS:ASCs from human adipose tissue were isolated by enzymatic di-gestion and cultured.ASCs were confirmed by the analysis of the markers for cell phenotypes by flow cytometry ( FCM) and adipogenic/osteogenic induction.The effect of maxadilan on ASCs viability was analyzed by CCK-8 assay and FCM.ASCs were irradiated by ultraviolet C ( UVC) at 254 nm and the absorbance of apoptotic ASCs induced by various doses of UVC was measured by CCK-8 assay.ASCs were exposed to 702 J/m2 UVC for 24 h to induce apoptosis.The effect of maxadilan on ASC apoptosis was analyzed by FCM and the determination of caspase 3 and caspase 9 levels.RESULTS:Adipose-de-rived stem cells were confirmed by the detection of the positive expression of cell phenotypes including CD29, CD44, CD59 and CD105 by FCM.The data of CCK-8 assay revealed that ASCs treated with maxadilan (80 nmol/L) had the strongest ability of proliferation.The data of FCM also demonstrated that the addition of 80 nmol/L maxadilan to ASCs in experimen-tal group markedly improved the proliferation capacity of the cells compared with control group (P<0.05).The apoptosis of ASCs exposed to 702 J/m2UVC was dramatically inhibited by the treatment with maxadilan (80 nmol/L).Such process involved the caspase signaling pathway including caspase 3 and caspase 9.There was statistical significance (P<0.05) between experiment group ( ASCs irradiated by UVC and supplemented with maxadilan) and control group ( ASCs only irra-diated by UVC) .Meanwhile, adipogenic and osteogenic differentiation potentials were both positive in experiment group and control group.CONCLUSION:Maxadilan promotes proliferation and inhibits apoptosis of the ASCs.The differentia-tion potential of ASCs toward adipogenic and osteogenic lineages wouldn’ t be altered by maxadilan.Maxadilan would bene-fit to growth and expansion of ASCs in vitro.

Diagnostic Errors ; Humans ; Inflammation ; diagnosis ; etiology ; Laryngeal Neoplasms ; surgery ; Male ; Middle Aged ; Papilloma ; surgery ; Pneumonia ; diagnosis ; Postoperative Complications ; diagnosis

Objective To study the healing effect of recombinant human acidic fibroblast growth factor(rhaFGF) expressed in E.coli on dermal chronic ulcers in diabetic rats.Methods Ten male Wistar rats were used to set up diabetic dermal chronic ulcers models.The wounds were sprinkled with rhaFGF and physiological saline,respectively.The wound area,wound cavity volume and healing time were recorded,granulation tissue growth and epithelization in wound were observed,and wound healing status was evaluated.Results Compared with control group,the wound area and wound volume at different day in rhaFGF group were significantly diminuted(P

Objective To prepare a biodegradable sckeral implant containing triamcinolone-acetonide-acetate(TAA) and polylactic acid(PLA) and investigate its release in vitro.Methods The TAA-PLA implant was prepared by melt-extrude technique.The drug release of TAA in vitro was determined by high performance liquid chromatography(HPLC).Results The implant was white pillar with 8 mm in length,8 mg in weight,and 0.8 mm in diameter.The drug loading was 30%.The drug was released at a steady and slow rate.Its accumulation release rate is 75.84% on the 30th day.Drug release profile in vitro was in accordance with Higuchi equation Q=0.137(t-0.752)1/2.Conclusion A sleral implant containing TAA-PLA is prepared,which has the evident feature in delaying the release of TAA and is biological degradable.It might be a novel vehicle for the topical use of TAA.

Objective:To investigate the association of thyrotropin receptor antibodies(TRAb) with the sensitivity to glucocorticoid therapy in Graves′s ophthalmopathy(GO) patients.Methods:Total 37 subjects with active GO were treated with prednisone. According to the relieve degree and clinical activity of their eye symptoms post-steroid treatment, patients were grouped into sensitive group(S) and non-sensitive group(NS). TRAb positive rate and antibody titer of the two groups were compared.Results:In S group( n=28 ), the positive rate and titre of TRAb were 76.53% and (12.54?5.62) U/L, respectively; The positive rate and titre of TRAb post-treatment were 22.18% and (7.82?4.91) U/L, respectively, were significant lower than data prior treatment. In NS group( n=9 ), the positive rate and titre of TRAb prior treatment were 67.24% and (11.07?4.63) U/L, respectively; The positive rate and titre of TRAb post-treatment were 59.74% and (10.81?5.96) U/L, there was no significant difference with data prior treatment. Prior treatment, there was no significant difference of TRAb titres between the two groups. Post-treatment, TRAb titres in NS group were significant higher than in S group.Conclusion:The variations of TRAb level were closely correlated with the sensitivity to glucocorticoid therapy in GO patients. Serum TRAb level can be used as a major index to evaluate therapeutic sensitivity to glucocorticoid therapy in GO.

The present of atlanto-axial pedicle screw fixation through posterior approach provide a new remedy for treating instability of pillow and cervical. A lot of researches have reported feasibility of atlanto-axial pedicle screw fixation, the results showed that it had advantages of easily exposure, less blood loss, shorter operative time, especially in treating as remedy fixation for atlanto-axial joint screw, atlas lateral mass screws and pedicle screw caused by injuries of tumor,inflammation and trauma. If not done properly, it can cause serious complications, such as iatrogenic fracture,injuries of vertebral artery and cervical spinal cord. Therefore,the safty and effectiveness of atlanto-axial pedicle screw fixation may be focus of research.
Atlanto-Axial Joint ; surgery ; Bone Screws ; utilization ; Cervical Atlas ; surgery ; Fracture Fixation, Internal ; instrumentation ; methods ; trends ; Humans ; Spinal Fractures ; surgery

Objective To explore the consistency of knee articular cartilage defect area by magnetic resonance imaging (MRI)and arthroscopy.Methods Thirty-six patients (36 knees)with knee cartilage lesions were collected in our study.The defect area meas-urement of knee articular cartilage by MRI and arthroscopy was compared.Results A total of 92 lesions were detected by both MRI and arthroscopy with an average of 2.6 defects per knee.Preoperative MRI resultes demonstrated the mean defect area per knee was (1.9±1.5)cm2 ,while arthroscopic measurement after debridement indicated the mean defect area per knee was (2.9±2.6)cm2 , which had significant difference(P <0.001).The area measured by MRI was less than that by arthroscopy,and the mean difference was (1.7 ± 1.1)cm2 .The mean area measured by MRI was 70.1% of that by arthroscopy.Conclusion Arthroscopy and MR have good consistency in the number of articular cartilage defect lesions .MRI can reflect the knee articular cartilage defect area directly or indirectly,and be capable of accurate positioning and qualitative diagnosis.