Objective To establish the assay method of hydroxyproline(HYP) level in rat lung tissue for evaluating the lung fi-brosis degree .Methods The impact of different acid hydrolyzable time ,oxidative time ,developing time on the assay results of the HYP level in rat lung tissue was studied .On this basis ,the assay method for determining the HYP level was established and prelim-inarily applied in the detection of the HYP level in rat lung tissue .Results The optimal condition for the HYP level detection in rat lung tissue was as follows :7 .50 mol HCL was hydrolyzed for 16 h at 110 ℃ ,oxidized for 10 min at room temperature and devel-oped for 25min at 60℃ .The sensitivity of this method was 0 .067μg/mL .The recovery rate and the average CV of this method were 88 .85% -110 .88% and 4 .70% -6 .60% ,respectively .In the study of bleomycin induced rat lung fibrosis ,the HYP level of the model group was obviously higher than that of the control group .Conclusion This method has high sensitivity ,high recovery rate and good reproducibility ,and may be used as a reliable quantitative method to judge the lung fibrosis level in clinic .

Objective To assess and delineate the dosimetric shortcomings of conventional radiotherapy planning,as compared with the three dimensional treatment planning system, and to obtain a better technique in the treatment of lung cancers.Methods Thirteen patients with stage ⅢA ⅢB non small cell lung cancer were chosen in the present study. Using the Cadplan 6.0.8 treatment planning system , three different methods of radiotherapy planning: conventional planning, conventional and conformal planning, and conformal planning were designed for each patient. The total radiation dose was 66 ?Gy and DVHs were used to assess the dosimetric distribution in the gross tumor volume and the surrounding organs at risk. Results No significant dosimetric disparity in the target volume was found among the three designs, according to anticipated therapeatic requirements. The conformity indices were 0.13,0.24 and 0.35 for these three radiotherapy designs. The mean lung volumes which received radiation dose of≥20?Gy were 32%,26% and 25%.The mean maximum dose at the spinal cord were 42?Gy,49?Gy and 33?Gy.The mean esophageal volume which received radiation of ≥50?Gy were 32%,34% and 22%, and the mean radiation dose to the heart were 18?Gy,15?Gy and 12?Gy,respectively. Conclusions Conventional radiotherapy planning is able to meet the demands of dosimetric requirements for radiation treatment of lung cancers. The three dimensional conformal radiation therapy planning system is able to provide superior delivery of high dose to the target volume without inflicting too high a risk to the surrounding normal tissues and organs.

Objective To investigate the inhibitory effect of RNA interference on the expression of Aurora A in U251 cells, and the influence on proliferation and apoptosis of U251 cells. Methods The siRNA specific for Aurora A was synthesized and transfected into U251 cells in vitro. Aurora A mRNA expression and protein content were detected by RT-PCR and Western blotting respectively. The cell proliferation and apoptosis were observed by methyl thiazolyl tetrazolium(MTT) and flow cytometry(FCM). Transmission electron microscope was used to observe the ultrastructural changes of U251 cells. Results After transfection, the expression level of Aurora A mRNA was significantly decreased(P<0.01), and the protein content of Aurora A was also obviously reduced. The inhibitory rate of cell proliferation reached up to 67.57% 72 hours after transfection, which was significantly higer than that of normal control group(P<0.01). The apoptosis rate of U251 cells was significantly increased from (3.69±0.87)% to (15.34±2.16)% (P<0.01). Under the transmission electron microscope, it was observed that the U251 cells showed typical morphologic changes of apoptosis after transfection, such as karyopyknosis, chromatin condensation and margination, intracytoplasmic vacuoles formed, and apoptotic bodies formed. Conclusion The expression of Aurora A gene can be inhibited by siRNA successfully, and it results in the suppression of cell growth and induce apoptosis of human glioma cells in vitro. Aurora A may become a new target for the gene therapy of gliomas.

Objective To assess standardized patients (SP) in resident general practitioners training for their consultation skills to explore its role in clinical competence training. Methods SP are employed in standardized training for 52 resident general practitioners in Shanghai during May to July 2008 to assess trainees' clinical consultation skills, including medical history taking and physical examinations, as well as clinical competencies of trainers including medical history taking, physical examinations, clinical thinking (diagnosis, differential diagnosis and treatment plans), health education, medical record writing,and reception time management. Feedback and appraisal for their consultation skills were provided by SP later. Problems encountered in trainees' consultation were discussed in group manner with their trainers.And two mouths later, assessment with SPs was undergone again for their consultation skills to compare their scores in consultation skills and percentages of them passing the assessment before and after training. Results Trainees were enrolled in the training aged (28±1 ) years in average ( with a ratio of men to women of 19/33 ). Percentage of trainees passing the assessment by SP for consultation skills was significantly higher after training (88.5%) than that before it (46. 2% ) ( P < 0. 01 ). Percentage of trainees with scores passing assessment by trainers was also significantly higher after training than that before it (86.5% vs. 51.9%, P < 0.01 ), with a percentage of those qualified for clinical skills and health education after training of 80. 8% and 88.5%, respectively, as compared to those of 46. 2% and 67. 3%,respectively before it, ( P < 0. 01 ), and with a percentage of trainees qualified for clinical thinking, out-patient medical record writing and reception time management not changed after training (71.2%, 100. 0%,100. 0%, respectively) as compared to those before it (51.9%, 100. 0% and 100. 0%, respectively)(P > 0. 05 ). Conclusions Application of SP can effectively enhance consultation skills of the trainees,especially in their medical history taking and physical examinations. However, there is still rooms to improvein their clinical thinking.

Objective To assess roles of standardized patients (SPs) in training of communication skills for resident general practitioners (GP). Methods Fifty-two resident GPs were trained for communication skills in consultation with SPs during May to July, 2008, including information feedback from SPs, lectures and group discussion coordinated by instructors on problems developed during residents' clinical encounters. Communication skills of the trainees with patients was assessed before and after training, respectively, including building physician-patient relationship, collecting information and providing feedback, understanding complaints from patients' perspective, sharing information and obtaining informed consents and closing consultation. Assessment was scored and proportion of trainees qualified for consultation with SPs were estimated. Results Total score of the trainees was higher after training than that before it (76 ± 13 vs. 49 ± 12, P ＜ 0. 01 ), and 86. 5 percent of them qualified for their communication skills after training, as compared to that of 15.4 percent before it. Proportions of the trainees qualified for building physician-patient relationship, collecting information and providing feedback, understanding complaints from patients' perspective, sharing information and obtaining informed consents during consultation were higher after training than those before it (90. 4% vs. 59. 6%, 65.4% vs. 5.8%, 38.5% vs. 11.5%, 86. 5% vs.17.3% and 65. 4% vs. 3. 9%, respectively, all P ＜0. 01 ). Scores of physician-patient communication in the trainees correlated with those of their consultation skills both before and after training ( r = 0. 55 and r =0. 63, both P ＜ 0. 01 ). Increase in scores of physician-patient communication and consultation skills in trainees after training also associated with that in those of clinical skills ( r = 0. 62, P ＜ 0. 01 ). Conclusions Application of SPs can effectively enhance communication skill of resident general practitioners, thus improve their competencies in clinical consultation.

OBJECTIVE: To evaluate the improvement of speech perception in Chinese-native cochlear implant (CI) children using frequency modulated system (FM system). METHOD: The mandarin speech perception (MSP) system was used to evaluate 11 cases with severe and profound hearing loss who were fitted cochlear implants. Listeners were asked to repeat MSP words presented in quiet and several different signal-to-noise ratio (SNR) conditions and percent correct word repetition was determined. Performance was evaluated under FM system and without FM (CI only). In addition, the listeners' subjective performance changes in the experiment were also observed. RESULT: (1) There was significant main effect of the device condition (with FM and no-FM) (F = 72.938, P < 0.01), a significant main effect of signal level (F = 230.715, P < 0.01), a significant interaction effect between the signal level and the device condition (F = 40.893, P < 0.01). (2) Listeners answered the question in a louder voice, showed more confidence, when using with FM system. CONCLUSION FM system could improve the speech reception in a complex environment for Chinese-native CI children.
Child ; Cochlear Implantation ; Cochlear Implants ; Humans ; Noise ; Signal-To-Noise Ratio ; Speech ; Speech Perception ; Speech Therapy

The microbial populations and community structure characterization technologies of the enhanced biological phosphate removal system were reviewed comprehensively in this paper, and their future research directions were outlined.

The kinase domain of receptor tyrosine kinase(RTK) ErbB2 was expressed fused with GFP in Pichia pastoris. Recombinant expression vector pPIC3.5K was constructed in Escherichia coli TOP10. The right P. pastoris transformants were screened on his-deficient plates and YPD-G418 plates by turns after electroporation of recombinant vector, and then induced by methanol in baffled shake bottles. The strain with highest protein yield was scaled up in a 5 L fermentor. Recombinant protein was analyzed with tyrosine kinase assay after Ni2+ affinity chromatograph. Results showed that the 100 kD recombinant protein with tyrosine kinase activity was successfully expressed in P. pastoris.

Objective: It is difficult to repair large-area Ⅲ?burn wound in children.Here we introduce the advantages of the back skin donor site in repairing Ⅲ?burn wound in children.Methods: This clinical study included 15 children with Ⅲ?burn,ranging in age from 18 months to 11 years(mean 7.6 years),with the Ⅲ?burn wound area averaging at 12.6% of the total body surface.The back skin donor site was used to repair the wound.The functional site,such as the joint,was preferentially considered if the skin graft was not enough for all the wounds.Results: Most of the skin grafts survived and the donor sites on the back healed very well.The patients were followed up for six months to three years,which revealed that the skin grafts remained soft without dysfunction and the scar hyperplasia was mild on the donor site.Conclusion: The back donor site supplies larger-area skin with good quality.The donor site heals fast.After healing,patients could sleep on back and compress the scar so as to prevent scar hyperplasia,and the scar does not affect the patient's appearance.With all these advantages,the back donor site is a good choice for repairing Ⅲ?burn wound in children.

Objective To investigate the efficacy of gelatin sponge particles(GSP)or polyvinyl alcohol particles (PVA) for hemoptysis secondary to bronchiectasis or pulmonary tuberculosis. Methods The clinical data on 271 patients with bronchiectasis- or tuberculosis-induced hemoptysis were retrospectively analyzed. The efficacy and rates of recurrence and complications were analyzed. Results A total 271 patients were included in this study, 176 of whom suffered from bronchiectasis and the rest 95 had tuberculosis. One-week cure rate was signifi-cantly higher in bronchiectasis group than in tuberculosis group(73.3%vs. 46.3%,P<0.05),and one-year recur-rence rate was significantly lower in bronchiectasis group(17.6%vs. 26.3%,P<0.05). One-year recurrence rate was slightly higher in patients receiving GSP than in those undergoing PVA(bronchiectasis group:22.2%vs. 10.3%, P<0.05;tuberculosis group:28.8%vs. 22.2%,P>0.05). No severe complications occurred. Conclusions In-terventional artery embolization therapy for hemoptysis secondary to bronchiectasis is better than tuberculosis-induced hemoptysis,and PVA is more effective than GSP. Recurrence of massive hemoptysis mostly occurrs within one month ,and most of the patients are complicated with blood supply and have a history of hemoptysis.