During the translation process, aminoacyl tRNA enters the ribosome, decoding the codon on the mRNA and brings the mRNA moving forward towards the 5′ direction of mRNA, until the de-acylated tRNA leaves the ribosome, it moves through the ribosome in one direction. Recently, with the finding and identification of the highly conserved protein LepA, a new kind of tRNA movement inside the ribosome, namely the back-transloation of the tRNAs and mRNA in the direction of mRNA 3′ is discovered. With the in-depth research, the physiological meaning behind the back-translocation for the translational efficiency and fidelity has been studied.

Objective:To study the formation of lesions,caused byHIFU with SonoVue,in liver tissues containing blood vessels with the diameter of about 3mm.Methods:The livers of ten goats were insonicated linearly by Model-JC focused ultrasound tumour therapeutic system.The target regions contained blood vessels with the diameter of about 3mm,with or without SonoVue.24 hours after the insonication,the goats were executed with overdosage anesthetics.The length,width and thickness of the lesions were measured,then the necrosies volumes with and without SonoVue were compared.Results:When the depth was 30mm,and the target regions caotained large blood vessels,HIFU with SonoVue could form lesions effectively.There was difference of necrosis volumes between lesions with and without SonoVue,and the difference was significan(tP

Objective To analyze the fetal growth ,development and birth situation in umbilical artery absent end‐diastolic flow(AEDF) in late pregnancy .Methods The umbilical artery blood flow signals were detected by color ultrasonic diagnostic in‐strument .The fetal growth indexes and Apgar score at birth were compared between the normal umbilical artery group and the AEDF group .Results The occurrence rate of fetal growth and development less than the gestational age was significantly higher than that in the normal group ,moreover the occurrence rate of intrauterine stress was also obviously higher than that of the normal group .Conclusion Umbilical arterial AEDF in late pregnancy prompts the fetal intrauterine hypoxia and relatively slowly fetal grow th .

Ohjective To study the indications,clinical effect and complications of hysterectomy so as to im- prove therapeutic effect.Methods The clinical data involving 320 cases of hysterectomy in this hospital from 2000 to 2006 were reviewed,and the pathogenesis,operation mode,curative effect and post-operation complications were analysed.Results Patients who received hysterectomy due to benign gynecologic diseases were cured well cliniclly; those who received hysterectomy due to malignant gynecologic diseases or diseases with the tendency of malignant change were cured well in early stage but the effect was not so satisfactory in later stage.The operation mode was de- cided by considering the pathogenesis and individual difference.Conclusion For benign gynecologic diseases,hys- terectomy can be conducted with good effect after conservative treatment becomes ineffective.For malignant gyneco logic diseases,early treatment will bring good resuh,while late treatment will generate not so satisfactory effect.Indi- cations for operation should be controlled strictly for hysterectomy to guard against complications.

Objective: To explore the effect of health insurance on consumption for rural and urban households. Methods: Using empirical study with the method of quasi-social experiment. Results: Households with health insurance have more consumption than those without health insurance. The higher the coverage of family health insurance improves, the more effects medical insurance would encourage family consumption. Meanwhile, the marginal effect of health insurance on rural households ’ consumption is much bigger than that of urban households. Conclusion: Through enhancing households’ risk tolerance, health insurance reduces households’ precautionary saving motivation and impels to increase the current consumption.

Objective To study the effect of rosiglitazone (RSG), the agonist of peroxisome proliferator activated receptor γ (PPARγ), on the proliferation and differentiation of rat osteoblasts and the related mechanisms. Methods The identification of rat primary osteoblasts was performed by alkaline phosphatase (ALP) staining and mineralized nodules. The 3-(4,5)-dimethylthiahiazo (-z-y1)-3,5-di-phenytetrazoliumromide (MTT) assay and p-nitrophenyl phosphate (PNPP) assay were used to observe the effects of different concentrations of RSG on proliferation and differentiation of the osteoblasts. The reverse transcription polymerase chain reaction (RT-PCR) were used to detect the expression of connective tissue growth factor (CTGF) mRNA. The effects of the different concentrations (0,1,2,5,10 and 20 μmol/L) of RSG on TGF-β1-induced CTGF mRNA expression in osteoblasts were detected. Results (1)Different concentrations of RSG could not change the proliferation of osteoblasts (P＞0. 05). (2)Compared with control group, all different concentrations of RSG could suppress ALP activity in osteoblasts (P＜0. 01 ). (3) RSG suppressed the osteoblats CTGF mRNA expression induced by TGF-β1 in a dose-dependent manner (P＜0. 01). Conclusions In vitro, RSG can inhibit the TGF-β1 induced rat osteoblasts CTGF mRNA expression. RSG may play a potential role in preventing the differentiation of the rat osteoblasts.

Objective To explore the clinical effect of probiotics combined with saline enema in the treatment of infantile diarrhea and its effect on serum inflammatory factors.Methods 186 cases of infantile diarrhea were selected,they were randomly divided into three groups according to the random number table method:probiotics group,montmorillonite group and control group.Patients in probiotics group were administered with clostridium butyricum combined with saline enema,and patients in the montmorillonite group were treated by montmorillonite combined with saline enema,and the control group was given routine treatment.Then,the clinical symptom relief time,total effective rate,serum inflammatory factor concentration and adverse reaction were observed and compared.Results The total effective rate of the probiotics group was 98.39%,and that of the montmorillonite group was 96.77%,both of which were significantly better than 80.65% of the control group,and the differences were statistically significant(χ2 =11.408,P =0.000;χ2 =8.432,P =0.018).After treatment,the serum levels of inflammatory factor tumor necrosis factor -α(TNF -α)in the probiotics group,montmorillonite group,control group were (8.30 ±2.33)pg/mL,(8.54 ± 2.47)pg/mL,(12.49 ±3.44)pg/mL,and the difference was statistically significant(F =5.120,P =0.014),also, the serum levels of interleukin -6(IL -6)in the three groups were (10.08 ±5.46)pg/mL,(11.24 ±5.84)pg/mL, (14.02 ±5.97)pg/mL,the difference was statistically significant(F =34.015,P =0.000).There were 2 cases of constipation in the montmorillonite group,the incidence rate was 3.23%,and there was no adverse reaction in the other two groups.Conclusion The effect of probiotics combined with saline enema in the treatment of infantile diarrhea is similar to that of montmorillonite,which can promote the children to alleviate the symptoms,shorten the length of hospital stay,reduce inflammation,and has no adverse reactions such as constipation,it is worth to be recom-mended widely for clinical application.

The requirement for HCWs grows with the transfer of medical care model and increasing expectation of social population.This paper reviews the Psycho-social education in PUMC for 90 years and creates potential strategies for the Psycho-social education in long-term medical education program in China.

OBJECTIVE To investigate spectrum distribution of pathogens in patients with artificial airway and analyze their associated factors.METHODS The clinical data of 27 patients with tracheal intubation or tracheotomy from Mar 2005 to Mar 2006 were analyzed retrospectively.RESULTS Twenty seven patients were diagnosed as pneumonia.A total of 384 isolates of pathogens were collected from 258 sputum culture.The most were Gram-negative bacilli(293 isolates),and then were Gram-positive cocci and fungi.The four most pathogens were Pseudomonas aeruginosa,Stenotrophomonas maltophilia,meticillin-resistant Staphylococcus aureus(MRSA) and Acinetobacter baumannii.More multiple drug resistant(MDR) pathogens were detected in patients two weeks after intubation or tracheotomy than that after one week,and it was the same with sensitive rates to antibiotics of G-bacilli.CONCLUSIONS Patients with artificial airways have a higher morbidity of MDR pathogens and longer retention time of artificial airway can increase infection of MDR pathogens of lower respiratory tract.

Alzheimer's disease( AD) , a neurodegenerative disease, can result in memory loss, cognitive and behavioral deficits. The pathological hallmarkes are β amyloid plaques and neurofibrillary tangles which lead loss of neurons in brain. As the extension of the central nervous system, retina has a similar tissue anatomy with central nervous system. The β amyloid plaques have also been detected in retina of AD. Furthermore, according to eye examinations of AD patients, we have found the loss of retinal ganglion cells, the attenuation of retinal nerve fiber layer thickness, the smaller changes of macula lutea, the decline of vascular density and so on. And then, there occurs the visual field loss and the decline of contrast sensitivity and so on in AD patients. Thus, the retina has occurred nerve degenerative changes in AD. Meanwhile, there has been proved that the retina nerve degeneration is even earlier than senile plaques formation in brain. In addition, curcumin, a natural and safe fluorescent dye, can be used to label β amyloid plaques in retina. The above suggests that retina can be a window for the early diagnosis of AD.