Objective To study the effect of Shenqiwan and vitamin E on mtDNA 4834 deletion in a mimetic aging rat model .Methods Forty rats three months old ,were randomly divided into four groups :group A ,which was treated with hypodermic 5 % D -galactose for 8 weeks ,and group B (shenqiwan group ,n=10) which was treated daily with Shenqiwan for 2 weeks after hypodermic 5 % D -galactose for 6 weeks ,group C (vitamin E group ,n = 10) which were treated daily with Vitamin E for 2 weeks after hypodermic 5 % D -galactose for 6 weeks ,group D were given saline only .Auditory brainstem response (ABR) was used to detect the hearing thresh-old of rats before and after the treatment .The inner ear tissue was harvested and mitochondrial DNA was amplified to identify the 4834 bp deletion mutation by nested primer polymerase chain reaction (nested PCR) technique .Re-sults The threshold of ABR in the group A ,B and C were significant higher than that in group D .However the difference in shift of ABR threshold between group A ,B ,C and group D was not significant .The mtDNA4834 de-letion rate in three modeled groups (group A ,B ,C) was significant high than that of in group D .There was statis-tically significant difference between the treated group (group B ,C) and the model group (group A) on mtDNA4834 deletion in cochlea ,but the difference between the treated groups on mtDNA 4834 deletion in cochlea was not statistically significant .Conclusion Shenqiwan and vitamin E can reduce the aging induced mtDNA 4834 deletion in aging rats inner ear .

Objective To explore the development regularities and characteristics of child and adoles-cent body composition in Dalian,to provide scientific basis for their healthy growth and basic evidence for nutri-tional status and healthcare,and to accumulate dynamic date for evaluation of children's growth and development in the future.Methods Two primary schools、two secondary schools and one high school in Dalian were en-rolled,where four classes were taken from each grade,and 2 027students aged from 6-18 years were systematical-ly collected.The collected students were given height and weight tests,and body composition was examined with bioelectrical impedance analysis.Overweight and obesity were determined by body fat percent.Results (1 ) Height,weight,body fat percent,fat mass,lean body mass,muscles,bone mass,BMI and basal metabolism rate of the students increased from 6-18 years in Dalian,and the growth curves of boys and girls appear rising tenden-cy,while the percentage of total body water decreased.(2)The muscles,lean body mass and basal metabolism rate were obvious sex differences among all the age groups,and the others were sex difference in part of age. Body fat percent and fat mass of girls were greater than those of boys,while the other indexes of boys were grea-ter.(3)The obesity rate of girls in Dalian was 35.7%,while the boys'was 16.7%.Conclusion (1 )The find-ings were consistent with the growth characteristics of adolescent boys and girls aged 6-18 years in Dalian.(2) The muscles,lean body mass and basal metabolism rate were obvious sex differences among all the age groups, and the others were sex difference in part of age.(3)The obesity rate of students in Dalian was higher than the government standard.

Objective · To investigate the expression of androgen receptor (AR) in human breast cancer and its prognostic significance. Methods · A total of 183 female patients with breast cancer were selected. The expression of AR in breast cancer tissues was detected by immunohistochemical staining. The relationship of AR expression with the clinicopathological characteristics was analyzed. Survival analysis of AR gene expression by an online database (Kmplot) was also performed. Results · The positive rate of AR expression was 47.5% and was significantly higher in grade 1 and grade 2 group than that in grade 3 group (57.6% vs 25.0%, P<0.05). Breast cancer patients with estrogen receptor, progesterone receptor and P53 positive expression had significantly increased AR levels (P<0.05). AR expression were significantly higher in patients with luminal type as compared withthose in patients with human epidermal growth factor receptor-2 (HER2) positive and patients with triple negative breast cancer (51.7% vs 31.6%,P<0.05). Kaplan-Meier curves identified that AR gene expression was positively correlated with relapse-free survival, overall survival and distant metastasis-free survivalof breast cancer patients (P<0.05). Conclusion · The breast cancer patients with AR positive expression have a better prognosis, which suggests that inhibitors of AR pathway may be a treatment option for breast cancer.

Objective To assess the accuracy and precision of γ-spectrometry analysis, and to obtain accurate and valid measurement results in the middle term and long term. Methods A nationwide intercomparison on gamma-ray spectrometry measurement of activity concentration of 226Ra, 232Th and 40K in soil and building material was organized by National Institute for Radiological Protection( NIRP) , China CDC. Results 15 laboratories participated in this intercomparison, with 13 laboratories produced acceptable results. Only 2 laboratories were classified as " not acceptable" , including one for inappropriate accuracy in determination of 40K and another for inappropriate precision determination of 226Ra in both kinds of the samples. Through comment and discussion, the second round intercomparison got satisfactory results. Conclusions The overall measurement results of samples for intercomparison are in close agreement with the reference values. Most of the laboratories involved in the intercomparison have good ability in γ-spectrometry analysis.

Objective To evaluate the long-term clinical efficacy of iliac bone block allograft in anterior reconstruction of thoracolumbar fractures.Methods A follow-up study was carried out on 93 patients with thoracolumbar fractures treated by anterior decompression and interbody fusion with iliac bone block allograft from February 2004 to March 2007.The radiographic and clinical outcomes were retrospectively assessed.Results Sixty-six patients were followed up for 60-97 months (mean,78 months).The effective interbody fusion rate was 100％,with the fusion time of 6-12 months (mean,10 months).The Cobb' s angle corrected from pre-operative (21.6 ± 8.3)° to post-operative (5.8 ±5.2)°,but when the infusion became effective,the angle showed average loss of 2.4°.All the 66 patients were associated with various degrees of neurological deficiency,but the patients with incomplete nerve dysfunction obtained different degree of recovery.Conclusions Iliac bone block allograft is effective in reconstruction of spinal anterior-middle column stability with the aid of internal fixation instruments.Thereby,it may be a potential alternative to autograft in the treatment of thoracolumbar fractures and can attain early and late stage persistent spinal stability.

Objective To evaluate the effect of sufentanil postconditioning on myocardial ischemia-reperfusion injury in rats, and to investigate the possible mechanism. Methods Thirty male Sprague-Dawley ratswere randomly divided into 5 groups (n = 6 each): sham group (group S), I/R group (group I/R), low dose of sufentanil postconditioning group (group SL), high dose of sufentanil postconditioning group (group SH) andsufentanil postconditioning plus wortmannin group (group WM). Different drugs were injected before reperfusion: normal saline (NS) and sufentanil 1 μg/kg in group SL, NS and sufentanil 3 μg /kg in group SH, wortmannin 15 μg/kg andsufentanil 1 μg/kgin group WM, and NS in group S and I/R. At the end of reperfusion, artery blood was collected for assessment of plasma cTnI concentration; And the heart was harvested for determination of infarct size (IS) and area at risk (AAR). Results Compared with group S, cTnI concentration was increasedin the rest groups (P< 0.01); Compared with group I/R, cTnI concentration was decreased in group SL, SH and WM, while IS/AAR reduced in group SL and SH (P < 0.01); Compared with group SL, cTnI concentration and IS/AAR were decreased in group SH while increased in group WM (P <0.01). Conclusion Sufentanil postconditioning could attenuate myocardial ischemia-reperfusion injury in rats, and the mechanism involved PI3K related pathway.

Objective To study the clinical values of polyvinyl alcohol chemoembolization and bronchial arterial infusion(BAI) in interventional therapy of central bronchogenic carcinoma.Methods 45 pathologically proved cases of central bronchogenic carcinoma in mid or late period were randomly divided into two groups(control group in 24 cases and experimental group in 21 cases).After detecting the nourishing arteries of bronchogenic carcinoma with angiography,the treating processes were performed.Control group : anticancer drugs were poured into bronchial artery.Experimental group : the feeding arteries of tumors were co-axially superselective catheterized with microcatheters,the anti-neoplasm agents were poured into everyone of feeding arteries according to the blood supply,then the feeding arteries were embolized by polyvinyl alcohol.Results Control group : the obvious effective rate(CR+PR) was 50%.Experimental group:the obvious effective rate was 90.4%.Two cases in control group obtained the chances of radical operation and chemotherapy were performed after operation,the other 22 cases were undergone synthetic treatment.Seven cases in experimental group obtained the chances of radical operation and chemotherapy were performed after operation,14 cases were undergone synthetic treatment.Three cases in control group died and none of in experimental group died in the follow-up of 2~24 months.Conclusion The short-term effect of polyvinyl alcohol embolization is better than those of BAI for interventional therapy of central bronchogenic cancer,but the long-term effect needs a large number of cases to access the real clinical value.

Two cases of the aortopulmonary scptal defect were operated on our hospital. Among them, one was associated with patent ductus arterious and primary thrombocytopenia and the other with chronic heart failure. The defects were repaired successfully with a patch through a transaortic approach by means of four-point fixation. The diagnosis and surgical technique were discussed.

Objective To investigate the role of self-made auxiliary device in pelvic tumor radiotherapy with phantom immobilization using Varian cone-beam CT (CBCT).Methods A total of 50 patients with pelvic tumor were enrolled and randomly divided into study group and control group according to the order of enrollment.The patients in the study group were immobilized with thermoplastic phantom and self-made auxiliary device,and those in the control group were immobilized with thermoplastic phantom.CBCT scan and online matching were regularly performed before radiotherapy to obtain the setup errors of the left-right (x),cranial-caudal (y),and anterior-posterior (z) directions.The independent-samples t-test was used for comparison between groups.Results The set-up errors in the x-,y-,and z-directions in the study group were 1.56± 1.00 mm,1.60± 1.29 mm,and 1.36± 1.00 mm,respectively,and those in the control group were 1.76±1.33 mm,2.76±1.69 mm,and 1.92±0.91 mm,respectively (P=0.551,0.009,and 0.043).Conclusions Self-made auxiliary device helps to eliminate the errors in the cranial-caudal direction and solve the problem of involuntary activities of the lower limbs.

Objective To explore the analgesic effect of ropivacaine combined with sufentanil in epidural anesthesia on walk on painless labor.Methods 134 cases of maternal pregnancy were selected and randomly divided into two groups.61 cases were treated with conventional delivery,73 cases in the experiment group were treated with walk on painless labor.The visual analogue scale and improved Bromage classification score were compared at the first stage of labor,the second stage of labor,the third stage of labor.Results Compared with the control group,the rate of cesarean section was higher(P<0.05),The visual analogue scale was higher at the first stage of labor,the second stage of labor,the third stage of labor,the duration of labor were lower at the first stage of labor,the second stage of labor,the third stage of labor(P<0.05),and there was no significant difference between the two groups in the motor nerve block.Conclusion Ambulatory labor analgesia on maternal effect significantly,can significantly reduce the pain degree of maternal birth process and deliverry time,postpartum less complications.