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 investigate the effect of different doses of lidocaine on expression of the high mobility group box 1 protein (HMGB1) in small intestine in septic rats.Methods Fifty adult male Wistar rats weighing 200-250 g were randomly divided into 5 groups ( n =10 each):sham operation group (group S),sepsis group( group Sep ) and different doses of lidocaine group (group L1～3 ).Group S were not applied cecal ligation and puncture (CLP).Sepsis intestinal damage model was performed in group Sep by CLP.Group L1～3 were given intraperitoneally lidocaine in a dose ofS,10 and 20 mg/kg at immediately,1 and 2 h after CLP,respectively.Isometric normal saline was given intraperitoneally in group S and group Sep.The small intestine tissues were taken at 24 and 48 h after CLP.The small intestine morphology was observed with optical microscope.The expression of the HMGB1 mRNA were examined by PCR and the activity of diamine oxidase (DAO) were determined by ELISA.Results Compared with group S,the expression of HMGB1 mRNA was increased and the activity of DAO decreased in group Sep and groups L1～3 at 24 and 48 h after CLP ( P ＜ 0.05 ).Compared with group Sep,the expression of HMGB1 mRNA was decreased and the activity of DAO increased in a dose-dependent manner in groups L1～3 ( P ＜0.05),The injury of pathology of small intestine was slighter in groups L1～3 than in group Sep.Conclusion Lidocaine can reduce samll intestine injury through inhibiting HMGB1 expression in septic rats by a dose-dependent manner.

Objective To investigate the effect of vasoactive intestinal peptide (VIP) and methylprednisolone (MP) on Toll-like receptor (TLR)2/4 mRNA expression in endotoxin (lipopolysaccharide,LPS) induced shock.Methods Ninety Sprague-Dawley rats were randomly divided into LPS group (n =20),LPS + VIP group (n =20),LPS + MP group (n =20),LPS + VIP + MP group (n =20) and control group (n =10).LPS group injected intravenously LPS (E Coli O55B5) 10 mg/kg.LPS + VIP group,LPS + MP group and LPS + VIP + MP group were injected intravenously VIP 5 nmol/kg,MP 3 mg/kg and VIP 5 nmoL/kg + MP 3 mg/kg after LPS 10 mg/kg injection.The control group injected normal saline intravenously instead of LPS.The rats were sacrificed at 6 h and 24 h after injection and the intestine samples were collected.Pathological changes of the intestine were observed by microscopy.RT-PCR was used to detect the intestinal TLR2 mRNA and TLR4 mRNA expressions.Results Intestinal mucosa showed edema or necrotic change with structure of the microvilli disappeared after LPS injection.The inestinal lesions in VIP,MP and VIP + MP groups were milder than LPS group.At 6 h after LPS injection,TLR2 mRNA and TLR4 mRNA expressions were significantly up-regulated in LPS group,LPS + VIP group,LPS + MP group and LPS + VIP + MP group (TLR2 mRNA:1.14 ±0.38,1.17 ±0.42,1.16 ±0.41,0.92 ± 0.29;TLR4 mRNA 1.21 ±0.18,1.04 ± 0.38,1.11 ± 0.34,1.01 ± 0.20) compared with the control group (0.32 ± 0.20,0.24 ± 0.17) (P ＜ 0.01).But there was no significant difference between LPS group,LPS + VIP group,LPS + MP group and LPS + VIP + MP group (P ＞ 0.05).At 24 h after LPS injection,TLR2 mRNA and TLR4 mRNA expressions in LPS + VIP group,LPS + MP group and LPS + VIP + MP group (TLR2 mRNA:0.63 ± 0.12,0.59 ± 0.13,0.52 ±0.19;TLR4 mRNA 0.67 ±0.09,0.64 ±0.09,0.51 ±0.13) were significantly lower than LPS group (1.04 ± 0.38,0.82 ±0.18) (P ＜0.01) (P ＜0.05).Conclusion VIP and/or MP can mitigate intestinal injury induced by LPS shock.The gastrointestinal protection of VIP and glucocorticoids were related to downregulation signaling TLR2 mRNA and TLR4 mRNA expression.But VIP/MP and VIP + MP have no significant effect on expression of intestinal TLR2/4 mRNA until 24 h after LPS shock.

Objective To develop a new continent cutaneous diversion using a tapered ileum wrapped by rectus abdominis muscular flap. Methods Ten dogs underwent a procedure in which two 6 cm ileal segments were tapered and connected to the U-shaped reservoir which was detubularized by a 30-40 cm ileal segment with end-to-side anastomosis. A continent tube was created by a 6 cm length and 3 cm width rectus abdominis muscular flap with its blood supplied which was penetrated be-tween the mesenteric vessels of one tapered ileum (study tube) and wrapped around its periphery. The other tapered ileum (control tube) was brought out into the abdominal skin directly without any extra-mural support. Urodynamic studies were carried out at 1, 3 and 6 months postoperatively. The data of maximum inner pressure (MIP) and functional pressure length (FPL) of every study and control tubes at every study phase were recorded and statistics analysis were taken. Retrograde radiograms of the ef-ferent tubes were performed prior to sacrifice and histological examinations of study group were carried out after sacrificed. Results The average MIP in experimental group was significantly higher than that in control group at 1, 3 and 6 months post-operatively (P<0.01). However, no significant differences in MIP or FPL were found in study group between empty and full reservoir. In the control group, MIP was found rising significantly (P<0.001) and FPL (P<0.05) decreased sharply com-pared with empty and full reservoir. Retrograde radiograms confirmed that all efferent tubes were pa-tent and positioned straightly beneath the abdominal wall. Histological examination of study group at 6 months postoperatively demonstrated a layer of striated muscle around the serosa of the ileum. Conclusions The continent mechanism of tapered ileum could be enhanced by extramural support from wrapped rectus abdominis muscular flap. This technique could setup a reliable, easy catheterization continent cutaneous efferent tube.

Objective To discuss the features of nosocomial infection in patients with multiple trauma in intensive care unit and the preventive measures. Method The nosocomial infections occurred in 137 patients with multiple trauma were analyzed including site of infection, pathogenic organisms and bacterial strains. Results The rate of nosocomial infection was 62.8%, mainly the lower respiratory tract infection and wound infection, the G-negative bacteria infection accounted for 67.8%, mostly Escherichia Coli, Pseudomonas aeruginosa and A cinctobacter baumanni I. The G-positive bacteria infection accounted for 32.2%, mainly Staphylococcus aureus and Coagulase negative staphylococcus. The positive detection rates of Klebsiella and pseudomonas aeruginosa were increasing year afer year. Conclusions The incidence of nosocomial infection in patients with multiple trauma is high, suggesting some appropriate preventive measures should be taken to reduce the rate of infection.