For the purpose of opening up the future of more widespread application of cord blood,and also for the purpose of setting up the, bank of hemopoietic stem sells in cord blood,an effective method of cryopreserving the cord blood was approached, indicating, that it was appropriate that the time of cryopreserving the hemopoietic stem cells in cord blood at 4℃ should be 2-3 days (the storage of hemopoietic stem cells in cord blood with liquid nitrogen was an effective method of cryopreserving the hemopoietic stem cells in cord blood,with high recovery rate,and longterm cryopreservation without any change in the recovery rate;the effect of storing the hemopoietic stem cells in freezer at-80℃ was similar to that of cryopreserving them with liquid nitrogen,and the former was simple,e-conomic, convenient and practical, and needed no any programmed temperature-dropping apparatus .At the same time, it is convenient to using the stem cells in large scale and to setting up the bank of them. Preserving the whole cord blood can avoid the loss of hemopoietic stem cells in cord blood during the centrifuging process,with the effect of preservation being unchanged.

ObjectiveTo explore the curative effect about treatment acute coronry syndrome(ACS) by song ling xue mai kang drug used.Methods110 patients with ACS were randomly distributed into treatment group and control group,treatment group included 56 patients,control group included 54 patients,therapy of treatment group added song ling xue mai kang drug base on general treatmnet,but therapy of control group was only general treatment.It was time for four weeks.All patients were examinated blood lipid and C-reactive protein level(CRP) and liver kideny function end of four weeks,and follow-up cardiovascular ischemic event ( reangina attack,remyocardial infarction,heart failure,cardiol vascular death).Results C-reactive protein level of treatment group was less than its of control group,it was significant by statistics test( P ＜0.01 ).It was significant different about cardiovascular ischemic event between treatment group and control group( P ＜ 0.01 ).ConclusionIt was beneficial to patient of acute coronary syndrome about uesd song ling xue mai kang drug,it could reduce inflammatory reactive to happen in ACS,and reduce badness event of cradiolvascular.

Objective: To study the effect of topical administration of basic fibroblast growth factor (bFGF) on healing of rabbit corneal wound caused by mustard gas. Methods: All the corneas of 8 New Zealand white rabbits were injured by liquid mustard at the concentration of 0.2%. One eye of each rabbit was treated with bFGF eye drops 6 times daily, the other eye with 0.25% chloromycetin eye drops as control. Computerized image analyzer was used to calculate the corneal epithelial healing rate. Results: The mean epithelial healing rate in bFGF-treated eyes was (1.276?0.152) mm 2/h, whereas in the control eyes it was (1.094?0.154) mm 2/h. The difference of 2 groups was statistically significant (P

Objective To study the image features and clinical significance of 3-dimensional (3-D)and multiplanar reconstruction with spiral CT(SCT) in cervical spinal fractures.MethodPlain film radiography and spiral CT scanning were taken for 26 cases of cervical spinal fractures.The type of fractures, diagnositic successful rate, parameter of scanning and late stage managing methods were investigated retrospectively to find out the effective difference between the diagnosis of plain X-ray and SCT. The imagin location of fractures,sequence of cenrum, heighth of centrum, fracture line, auxillary structure and rotation/dislocation of the fractures were emphasized to evaluate the advantages of 3-D imaging.ResultIn the 26 cases, there were 4 Jefferson fractures, (in which 1 combined with articular dislocations), 17 C2 spinous process fractures, (in which 1 had failure of plain X-ray diagnostic), 1 Hangman fracture, 2 C1～2 imbalance, (in which 1 had failure of plain X-ray diagnostic).There were 2 cases of axoid longitudinal fractures without obvious dislocation. The diagnositic successful rate were 100% in SCT group, while 65% in X-ray group in which 6 cases had diagnostic failure and 3 cases had fracture mis-diagnozing as dislocation.The anatomical structure of upper cervical spine was complicated and was significantly different from other cervical spine constructions. Spiral CT could reveal high resolution images of the upper cervical spine, morphosis of vertibral canal, dislocation information of fracture mass and its relation with neighbouring tissues. Especially in C1 burst fracture,C2 dens fracture and C1～2 dislocation, SCT could provide clear 3-D information of the size of collateral mass and the dislocation degree, furthermore, images could be rotated freely to observe the fracture in any proper section. That provides important information for the decision of operation, selection of operation types and evaluation of operation dager.ConclusionThe spiral CT scan and 3D reconstruction can reveal fracture better.The advantages of SCT are suggested that this diagnostic modality may be the standard method for the initial evaluation of the upper cervical spine injury.

Objective To observe the effect of heat stress on plasma cGMP and hemodynamics in animals with chronic heart failure. Methods Coronary arteries of twenty-five rabbits were ligated to set up the animal model of heart failure and other five rabbits only received thoractomy as sham group. Eight weeks after coronary artery ligation, they are randomly divided into heat stress (HS) group, control group, HS+L-NAME group, and non-HS+L-NAME group and non-HS+L-Arg group, each group containing 5 animals. Hemodynamic indices and plasma levels of NOS and cGMP were measured. Results Hemodynamics of all 25 rats received operation was poorer compared with the rats of sham group (P

Objective To clone CTLA-4 and TCRV?8 gene from T lymphocyte of thyroid of Graves' disease (GD) patients,recombine to form CTLA-4-TCRV?8 fusion gene and express the fusion protein.Methods CTLA-4 and TCRV?8 gene was cloned from T lymphocyte of thyroid of GD patients by RT-PCR.Then it was recombined with expression plasmid in order.The correct plasmids were obtained after the restriction analysis and DNA sequencing.Prokaryotic expression of the fusion protein in E.coli,SDS-PAGE and Western Blotting were used to verify the fusion protein.Results Restriction analysis and DNA sequencing confirmed the correct sequence and insertion site of the recombinant plasmid.The recombinant fusion protein was successfully expressed in E.coli,which was consistent with the predicted putative calculating molecular weight.Conclusion CTLA-4-TCRV?8 gene was constructed and expressed successfully,providing gene product and application theory for immune tolerance therapy of GD.

Objective To study the relationship between occupational stress and metal health of radiation workers.Methods Totally 220 radiation workers were investigated by Chinese perceived stress scales questionnaire,Chinese health questionnaire-12,as well as questionnaire related to radiology.Results The stress score of radiation worker with senior title was 18.18 ± 6.12,which was the lowest of all 220 participants.There was positive relationship between stress score and health score (r =0.484).19.1％ of the workers sometimes felt stressed due to the danger of work.Conclusions There are some significantly correlation between occupational stress and metal disorder.More attention should be paid on the occupational stress.Positive measures such as decompression and psychological intervention will be helpful to protect physical and mental health of radiation workers.

BACKGROUND:The endothelial dysfunction is the pathogenesis of arteriosclerotic disease, the quantity and function of endothelial progenitor cells are decreased within the cycle, leading to a poor capacity of neovascularizatio, the efficacy of stem celltransplantation alone is unclear, the combination of cytokines and gene-modified stem cells is the hotspot.
OBJECTIVE:To observe the effect of stromal cel-derived factor-1 on the neovascularization after endothelial progenitor cells transplantation.
METHODS:Unilateral hindlimb ischemia model was established in 20 athymic nude mice, and the mice were randomly divided into four groups:combined group (intravenous endothelial progenitor cells+intramuscular stromal cel-derived factor-1), endothelial progenitor cells group (intravenous injection of endothelial progenitor cells), stromal cel-derived factor-1 group (intramuscular injection of stromal cel-derived factor-1), and blank control group (intramuscular M199). The skin temperature of ischemic hindlimbs and survival of animals after transplantation were observed. The ratio of capil ary/skeletal muscle fiber was counted. The expression of CD31 and endothelial nitric oxide synthase were detected.
RESULTS AND CONCLUSION:The fluorescence-labeled endothelial cells were embedded in ischemic hindlimb muscles after celltransplantation. Of the 20 nude mice, two mice died. The rate of ischemic hindlimb reserving was respectively 80%, 75%, 20%and 0 in combined group, endothelial progenitor cells group, stromal cel-derived factor-1 group, and blank control group. The capil ary/muscle fiber ratio in combined group and endothelial progenitor cells group was higher than that of blank control group (P<0.01). The combined group was greater than endothelial progenitor cells group, and endothelial progenitor cells group was greater than stromal cel-derived factor-1 group (P<0.05). The capil ary density in combined group and endothelial progenitor cells group were higher than that in blank control group (P<0.01), and stromal cel-derived factor-1 group was also more than blank control group (P<0.05). The combined group was greater than endothelial progenitor cells group, and endothelial progenitor cells group was greater than stromal cel-derived factor-1 group (P<0.05). The positive rate of endothelial nitric oxide synthase was 73.33%and 53.33%in combined group and endothelial progenitor cells group respectively (P>0.05). Endothelial progenitor cells can migrate to ischemic tissues, endothelial progenitor cells transplantation can promote neovascularization, and stromal cel-derived factor-1 augments the neovascularization after celltransplantation, in which endothelial nitric oxide synthase is involved.

Objective To discuss curative effect about radio frequently catheter ablation(RFCA) in frequently single originating premature ventricular beats.Methods 19 patients with frequently single original premature ventricular beats.The site of orgin was determined by activation mapping for the earliest endocardial activation,and by pace mapping for the exact QRS pacing site.Results 18 patients operation obtained immediate success,1 patient was failure,but no complication happened.After RFA in 2 weeks 24 hour Hoter ECG was used to examine arrhythmia condition,and all cases were follow up for 6～24 months after RFA,there were 17 patients who had no recurrence or phenomenon of premature beats augument,1 patient showed other type premature ventricular bearts.Conclusion It is safe and effective about RFA in frequently single origin premature ventricular beats of outflow lane.

Objective To assess the efficacy and safety of a newly-designed temporary covered cardia stent for the treatment of achalasia in canine models and to investigate the histopathological changes at different points of follow-up time after the stent was removed. Methods The canine achalasia model was created by injecting benzyl-dimethyl-tetradecyl ammonium chloride (BAC) circumferentially into the lower esophageal sphincter (LES) of the dogs. Twenty-four dogs with achalasia were randomly and equally divided into two groups with 12 dogs in each group:control group (using routine esophageal stents) and study group (using newly-designed temporary covered cardia stents). Under fluoroscopic guidance stents were implanted in the esophagus and were taken away from the esophagus 4 days after stent insertion in experimental dogs of both groups. LES pressures and timed barium esophagography (TBE) were performed in all dogs before and immediately after the stenting procedure,as well as at one week,3 and 6 months after the stent was removed. Every three dogs were sacrificed each time at one week,3 and 6 months after the stent was removed. The esophageal cardia was excised and sent for pathological examination. Results All animals well tolerated the stent insertion / removal and the follow-up procedures. No severe complications such as esophageal perforation occurred. Comparison between two groups showed that stent migration occurrence was much lower in study group (n = 1) than that in control group (n = 5). The reduction of LES pressures in study group was more significant in comparison with control group (at 6-month follow-up,P = 0.027). The difference in barium column product (height ? width) between 0-min and 5-min TBE was statistically significant in study group (at 3-month follow-up,P = 0.009). Integrated analysis of multi-comparison for LES pressures among subgroups of each group revealed that the dogs in study group exhibited better outcomes than the dogs in control group. Both proliferating cell nuclear antigen (PCNA) and ?-smooth muscle actin (?-SMA) immuno-staining revealed that the inflammatory reaction reached its peak at 1-month follow-up. Trichrome staining indicated that the collagenous fiber proliferating index inclined to be stable at 3-month follow-up. Conclusion In treating achalasia in canine models the newly-designed temporary covered cardia stent is superior to the routine esophageal stent in respect of safety and efficacy.