Hypoxia-inducible factor(HIF)is a pivotal transcription factor for hypoxic response.This article reviews the related characteristics of HIF-1 and its target genes vascular endothelial growth factor and the neuroprotective mechanisrms in cerebral ischemia.

Objective To explore a new method for establishing an animal model of cochlear ischemia.Methods Thirty guinea pigs were randomized into three groups:normal group,operation group,ischemia group.Anterior inferior cerebellar artery(AICA)was exposed surgically via a skull base approach.In ischemia group,a small piece of filter paper containing FeCl3 was placed upon the AICA to induce thrombus formation.In operation group,AICA was only exposed.In normal group,nothing was done to animal.The blood flow of cochlea(CoBF)was continuously monitored with laser Doppler flowmeter.The thresholds of auditory brainstem response(ABR)were measured before,after each experiment,and one week after operation.The AICAs of ischemia group and operation group were resected and pathological sections were perfomed for observation of the details.Results After the administration of FeCl3,the CoBF decreased to 50% of the base level at 30 min.In the AICA pathological sections of ischemia group,white thrombus composed of cellulose,blood platelets and erythrocytes could be seen.The threshold of ABR in ischemia group increased significantly.Conclusion The method provides a relatively ideal model for ischemis of the inner ear and this model may be helpful in studying the mechanisms of hearing loss caused by chronic microcirculatory disorders.

Objective To explore factors affecting diagnosis and treatment compliance in patients with gout leaving hospital,in order to provide a reference for late-stage clinical treatment.Methods 390 patients with gout treated in our hospital were selected from August 2012 to February 2016 for the study,all patients were followed up by telephone,their diagnosis and treatment compliance after discharge was investigated,and the factors affecting diagnosis and treatment compliance in gout patients after discharge investigated were,as well.Results The mean score of treatment adherence of 390 cases of gout patients after discharge was(3.93± 1.78) points.There were 117(30.00％) patients of which their score were ≥6 points for compliers,and 273 (70.00％) patients who do not comply with scores ＜6 points.Disease duration,education level,frequency of gout attacks,marital status and payment of medical expenses were closely related to diagnosis and treatment adherence(P＜0.05).Longer duration,low educational level,payment of medical expenses at their own expense were independent risk factors for poor adherence (P＜0.05).Conclusion We should strengthen the monitoring and follow-up of patients with gout who are with long duration of disease,low educational level,and pay medical expenses from their own pocke tinorder to improve patient diagnosis and treatment adherence,provide references for late-stage clinical treatment.

Objective To study clinical manifestations,laboratory variables,imaging features and therapies of refractory Mycoplasma pneumoniae pneumonia (RMPP).Methods The retrospective analysis of clinical data was conducted in 45 children with RMPP and 74 children with Mycoplasma pneumoniae pneumonia (MPP)admitted to department of pediatrics.The general data,clinical manifestations,laboratory variables,imaging features and therapies were compared between two groups.Results As compared to MPP,the age(6.14 ±3.35)y,febrile days(9.49 ± 5.28)d,the hospitalized days(11.45 ±3.42)d were significantly higher than that of MPP group (P <0.001);RMPP had higher rations of unilateral pulmonary infiltration[41(91.11%)],large consolidation shadows[35(77.78%)], pulmonary[21(46.67%)]and extrapulmonary complications[24(51.33%)](P <0.05);CRP,ESR,LDH and IgM were increased,the difference was statistically significant (P <0.01);Thirty -seven cases(82%)of RMPP had to add ceftriaxone sodium,thirty -two cases(71.7%)of RMPP had to add glucocorticoid,,Bronchofiberoscope lavages were used in six cases of RMPP.Only one case of RMPP occured sequela.Conclusion The older children,the per-sistent high fever,large consolidation shadows of pulmonary,pulmonary and extrapulmonary complications,high level of serum CRP,ESR,LDH and IgM are the clinical related factors of RMPP.The combination of cephalosporins and (or)glucocorticoid might consider for the cases who have no effect with macrolides.The effect is sure for RMPP with Bronchofiberoscope lavages.

0.05).[Conclusion]The stability of the single - level anterior cervical intervertebral decompression and fusion with plating Uniplate is satisfactory.Uniplate is valuable in clinic,furthermore,it is relatively simple to operate.

Objective To explore pre-thrombosis state in patients with cor pulmonale and the efficacy of anticoagulant treatment with low molecular heparin(LME). Methods 54 patients with cor pulmonale were divided into LMH treatment group and routine treatment group, each group containing 27 patients. The concentrations of Von Willlebrand factor (VWF),prethrombin F 1+2 fragment(F 1+2 ),Fibrinogen(Fg),granule membrane protein(GMP-140)and D-dimer fragment(DD)were measured before and after treatment. Results The concentrations of WF,F 1+2 ,Fg,GMP-140 and DD in the patients with cor pulmonale were significantly higher than those in the controls. In LMH treatment group, the above indices and PaCO 2 markedly decreased and PaO 2 obviously increased, while in routine treatment group, PaCO 2 and PaO 2 slightly improved, and no change was observed in coagulation indices. Conclusion Early detection and diagnosis of pre-thrombosis state in patients with cor pulmonale and immediate treatment with LMH can be beneficial to the prognosis of these patients in acute stage.

Objective:To study the ethical attitude of infertility patients and the public towards the artificial insemination technology,with the aim of its better clinical application.Methods:A questionnaire among 220 infertility patients and 720 persons of different social walks,followed by a contrastive study of the results.Results:There is distinctive difference(P

Objective To investigate the effect of propofol on the liver function of offspring rats de?livered by cesarean section. Methods Twenty?four Sprague?Dawley rats, at 20 days of gestation, weig?hing 230-270 g, were divided into 4 groups ( n=6 each) using a random number table: control group (group C), propofol 2.0 mg∕kg group (group P2), propofol 4.0 mg∕kg group (group P4), and propofol 8.0 mg∕kg group (group P8). In P2, P4 and P8 groups, the corresponding doses of propofol were injected intravenously, and the cesarean section was performed at 30 min after loss of righting reflex. In group C, the pregnant rats were sacrificed by cervical dislocation at the corresponding time point, and the offspring rats were removed immediately and inhaled oxygen sufficiently. The neonatal rats were sacrificed immediate?ly, and the blood samples were taken from the heart for determination of plasma alanine aminotransferase (ALT) and aspartate aminotransferase (AST) concentrations, and the livers were removed and cut into sections which were stained with haematoxylin and eosin for microscopic examination of the pathological changes. Results Compared with group C, the plasma ALT and AST concentrations in the offspring rats were significantly increased in P2, P4 and P8 groups (P<0.05). Compared with group P2, the plasma ALT and AST concentrations in the offspring rats were significantly increased in P 4 and P 8 groups ( P<0.01). Compared with group P4, the plasma ALT and AST concentrations in the offspring rats were signifi?cantly increased in group P8 (P<0.01). In P2, P4 and P8 groups, marked pathological changes of liver tissues were observed, and the severity was gradually aggravated in turn in offspring rats. Conclusion Propofol can induce damage to the livers of offspring rats delivered by cesarean section in a dose?dependent manner.

AIM:Cyclin is a decisive factor of regulating cell cycle,and RNA interference as an effective and specific gene silencing technique,can induce cell express the phenotype of specific gene deficiency. This study is to apply cyclinD1 specific small interfering RNA(siRNA) on inhibiting cyclinD1 gene expression and investigate the effect of cyclinD1 specific siRNA on the cell cycle and multiplication in keloid fibroblasts. METHODS:The experiment was conducted at the Institute of Genetic Engineering(Grade BSL-2) in Southern Medical University from July 2006 to May 2007.①siRNA was designed with siRNA target finder of ambion Company,and synthesized chemically in Shanghai GeneChem,Co.,Ltd. Then double-strand siRNA was obtained following degenerative renaturation. Keloid fibroblasts were sampled from the patients in the Department of Plastic Surgery,Southern Medical University(informed consents were obtained from the patients or their relatives).②The keloid fibroblasts were divided into experimental group and control group. The cyclinD1 specific siRNA was transfected into the keloid fibroblast of the experimental group by the liposome-mediated gene transfection method. The untreated cells were set as controls.③At hours 24,48 and 72 of transfection,light microscope was used to observe cell morphologic change and flow cytometry was used to examine cell cycle. The viable cells were counted by MTT colorimetry and a cell growth curve was drawn. RESULTS:①Abnormal change of cell morphology that became into spherical shape or oval-shape from normal long fusiform after transfection may be the apoptosis or necrosis cells.②The G1 stage of cell cycle extended and the S stage decurtated. At 24,48 and 72 hours after transfection,the radio of G1 stage cell was 60.13%,66.22% and 67.53%,which were all significantly higher than that in the control group(54.53%);the radio of S stage cell(18.25%,17.11% and 11.15%) was also significantly lower than that in the control group(22.31%),indicating that the proportion of the cells blocked in G1 stage and those in S stage decreased in the keloid fibroblast.③siRNA-cyclinD1 inhibited the growth of keloid fibroblasts obviously by using MTT assay,and the cell growth curves indicated that the proliferation of cell transfected with cyclinD1 specific siRNA was inhibited significantly when compared with controls. CONCLUSION:CyclinD1 specific siRNA effectively inhibits the expression of cyclinD1 in keloid fibroblasts thus arresting the cell cycle at G1 stage and enhancing cell apoptosis.

Objective To study and solve the repairing and reconstruction characteristic for chronic radioactivity ulceration on chest wall.Methods Using transverse rectus abdominis musculocutaneous flaps (TRAM) to repair and reconstruct 12 cases serious chronic radioactivity ulceration after radical operation of mastocarcinoma.Including 6 cases using single pedicle TRAM flaps, 6 cases using double pedicle TRAM flaps.Results All 12 cases were applied successfully with 100% survived and were followed-up for 1 to 4 years.There were better colour, texture, elasticity on flap and obviously improvement for cicatricial tissue round ulceration.Conclusion It is better choice for repairing chronic radioactivity ulceration on chest wall with transverse rectus abdominis musculocutaneous flaps and it is also reliable method for flap circulation using double pedicle TRAM flaps by vascular anastomosis.