Objective To explore the clinical effect and lung CT change of long-term used of low-dose roxithromycin in treatment for bronchial expansion patients in stable phase. Methods 94 cases collected in the Department of Respiration, The Second Hospital Affiliated to Suzhou University from February 2011 to December 2012 were diagnosed as bronchiectasis, 34 cases in control group were given oral treatment for ambroxol 30 mg, three times one day, 60 cases in treatment group were added roxithromycin 75 mg on basis of control group, two times one day. Patients in two groups were both treated for 6 months. The therapeutic effect and the score of life quality and dyspnea scores in two groups were observed, and the changes of CT data were compared before and after treatment. Results After treatment, the life quality score and dyspnea score of two groups were all improved, but the treatment group was signiifcantly higher than the control group (P<0.05). The effective rate in treatment group was 86.67%, which was signiifcantly higher than 70.59%in the control group (P<0.05). After treatment, chest CT imaging score of patients in treatment group were improved, signiifcantly better than that in the control group (P<0.05). Conclusion Long-term low dose administration of roxithromycin can control and stable bronchiectasis symptoms, and improve signs and symptoms .

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.

Objective To explore the relationship between angiogenesis and ischemic neurological deficit repair through exogenous interventions,and investigate optimal intervention routes for angiogenesis in cerebral ischemia rats.Methods Totally 240 SD rats were randomly divided into sham operation group,ischemic control group,ischemia and vascular endothelial growth factor(VEGF) group [1 653.3 ng/(g?d),i.p.,for 10 d],ischemia and endothelial progenitor cell transplantation(EPCs) group(2?1010/L,10 ?l),ischemia and anti-VEGF monoclonal antibody group [3 mg/(kg?d),i.p.,for 10 d].Cerebral microvessel density,somatosensory evoked potentials(SEP) and motor evoked potentials(MEP) and behavior were observed in 1,3,7,14,30 and 60 d after injury.Results New blood vessel density of ischemia and VEGF group,ischemia and EPCs group were significantly higher than ischemic control group in all time points besides 1 d after injury(P

Objective To investigate the contribution of single nucleotide polymorphisms (SNP)variation in folate metabolism pathway genes and its interaction with environmental risk factors to the etiology of NTD. Methods In 275 families from central China, a total of 278 aborted fetal tissues or blood samples were collected from NTD individuals, 478 maternal and/or paternal blood samples were also obtained as controls. Folate supplementation, maternal diabetes mellitus and medication before pregnancy and during the first trimester of pregnancy were investigated. SNP analyses of all samples were performed by CEQ 8800. Case-parent control study and transmission/disequilibrium tests (TDT) were performed according to environmental cofactors stratification to evaluated 28 SNP in 12 folate pathway genes associated with human NTD. Results Only gene MTHFR rs1801133 was significantly associated with NTD, and synergistic effects of environmental risk factors (no folate supplementation and maternal diabetes) were shown on the occurrence of NTD. Linkage disequilibrium between BHMT rs3733890 and NTD existed in case of no folate supplementation,whereas the genotype alone did not contribute to the etiology of NTD. Other SNP were not significantly associated with NTD. Conclusions MTHFR rs1801133 is a risk factor of NTD, but BHMT rs3733890 is not an independent risk factor. Further investigations in folate and methionine cycle genes are requird in larger scale to enclose the interactions between gene and gene, or gene and environmental factors.

Objective To evaluate the effectiveness of using adipose-derived stromal cells (ADSCs)into a tissue-engineered peripheral nerve on bridging sciatic nerve gaps.Methods Forty-eight F344 female rats weighing 200 - 220 g were randomly divided into 6 groups of nerve grafting to repair 15 mm long asiatic nerve lesions,with 8 mrs in each group.Group A:ADSCs-laden acellular nerves;group B:differentiated ADSCs-laden acellular nerves;group C:Schwann cells-laden acellular nerves;group D:acellular nerves without cells;group E:autografts;group F:nonimplanted grafts.The effects were evaluated in terms of electrophysiulogy,Fluorogold retrograde tracing,histology and tracking studies.Results At 12 weeks after surgery,there was no graft bridging nerve gap in nonimplanted grafts.All the examinations of group A and B were better than group D,respectively (P＜0.05 or P＜0.01).But there were no statistically significant differences among group A,B,C,and D (P＞0.05).Conclusion ADSCs and differentiated ADSCs could promote nerve regeneration when used as seed cells to build tissue-engineered peripheral nerves with acellular nerve scaffolds.

[ ABSTRACT ] AIM: To investigate the expression and clinical significance of bone morphogenetic protein 3 (BMP3) in hilar cholangiocarcinoma tissues.METHODS: Thirty cases of hilar cholangiocarcinoma specimens were col-lected.The expression of BMP3 at mRNA and protein levels in the tumor tissues and paracancerous tissues was detected by real-time PCR and Western blot.The hilar cholangiocarcinoma paraffin-embedded specimens (n=103) were collected. The protein expression of BMP3 was determined by immunohistochemical method, and the relationship of BMP3 protein ex-pression with clinical pathological characteristics was evaluated.RESULTS:In the 30 patients with hilar cholangiocarcino-ma, the expressions of BMP3 protein and mRNA in 22 cases of tumor tissues were significantly decreased compared with the adjacent normal tissues.The results of immunohistochemistry showed that 87 cases were negative and 16 cases were weakly positive in all 103 cases of hilar cholangiocarcinoma.The expression of BMP3 protein was associated with the tumor TNM staging, lymph node metastasis and tumor differentiation (P<0.05).CONCLUSION:BMP3 gene might be inhibited in human hilar cholangiocarcinoma.The down-regulation of BMP3 gene might be associated with the carcinogenesis and devel-opment of hilar cholangiocarcinoma.

Objective To investigate the current situation of radiation protection in nuclear medicine diagnosis workplace.Methods The study was performed in 3 hospitals in northeast,north and central of China from February to December in 2013.The γ dose rate instrument was used to detect the workplace ambient dose equivalent rate of medicine preparation,leaching,packing,injection and imaging.Individual effective dose and equivalent dose were evaluated by photoluminescent dosimeter.Results The ambient dose equivalent rate was up to 1.92 mSv/h at repacking place and 1.2 mSv/h at injection place.The ambient dose equivalent rate of patients after injection was 5.36-240 μ,Sv/h.The hand equivalent dose was 0.01-0.02 mGy.Moreover,there were problems of staff route intersection,as well as the patients after injection staying in the public area.Conclusions Radiation workers should pay more attention to individual protection,and improve the operation proficiency to shorten the operation time.Furthermore,in order to protect public from unnecessary irradiation,there should be some changes in staff route and patients administration.

Objective To use Monte Carlo method to build a shielding calculation model for the proton and heavy ion treatment room,and to provide a reliable calculation method for shielding design.Methods A Monte Carlo-based FLUKA code was adopted to build the shielding calculation model for the proton and heavy ion treatment room,and to simulate the radiation field distribution in the proton and heavy ion treatment room.The calculation model was verified through the radiation detection around the proton and heavy ions treatment room.Results The FLUKA code-based simulation results were consistent with the radiation detection.Conclusions The shielding calculation model based on FLUKA code can simulate the radiation field from proton and heavy ions.Among the secondary particles,secondary neutrons are the dominant component and the main concern of accelerator shielding design.In shielding calculation,the emphasis should be put on both beam intensity and energy.

Objective To evaluate the effect of simulated training on in-service physicians electrocardiogram(ecg) theory and operational learning effect.Methods Sixty resident doctors were randomly divided into experiment group (n=30) and control group(n=30).The experimental group adopted teaching + simulation training mode to implement the theory and operation of ECG in continuing while the control group were taught only by lectures.Training effect of both groups was assessed by electrocardiogram theory and operation examination before and after training respectively,and by questionnaires at the end of the training as well.Data of the examination and questionnaires were analyzed by t test or x2 test.P＜0.05 was considered statistically significant.Results After training,the score of theory examination was (90.87 ± 6.67) points in experiment group and was (85.83 ± 5.5) points in control group,with statistical difference between these two groups(t=3.201,P=0.003).Score of operation examination was(93.40 ± 4.31) points in experiment group and was(77.03 ± 7.96)points in control group,with significant differences(t=10.204,P=0.000).The satisfaction degree of enhancing learning interest,theoretical knowledge and operation skill,and strengthening the concept of humauistic care were significantly better in the experiment group than in the control group (x2=34.737,6.405,42.088,41.713,P=0.000,0.011,0.000,0.000).Conclusions Application of simulated training in the study of electrocardiogram is obviously superior in effect to the traditional teaching model.It can improve the theoretical knowledge and operation skill,which is helpful in elevating the in-service physicians' comprehensive capability.

BmK AngM1 is a long-chain scorpion toxin purified from the venom of Buthus martensii Karsch. It has been reported to exhibit evident analgesic effect and low toxicity, and has the potential to be a novel analgesic drug. The BmKAngM1 gene was transformed into Pichiapastoris GS115. Mut+ and Mut(s) recombinant strains were screened by phenotype and Mut+ recombinant strains were used to detect BmK AngMl gene copy number in the real-time PCR. Expression of BmK AngM1 in the Mut+ recombinant strain was compared with that of the Mut(s) recombinant strain with the same single copy of BmK AngM1 gene under the same condition. The results indicated that the transcription level of BmK AngM1 gene in the Mut(s) recombinant strain was 2.7 fold of that in the Mut recombinant strain in the real-time PCR, and the expression of BmK AngM 1 in the Mut(s) recombinant strain was 1.5 fold of that in the Mut+ recombinant strain. Therefore, Mut(s) recombinant strain showed better ability to express BmK AngM1 than Mut+ recombinant strain.