Objective To discuss the anatomical and radiographic parameters of medullary screw fixation of anterior acetabular column so as to provide reference for clinical application. Methods Thirty cadaveric pelvic specimens (including 18 males and 12 females) were involved in the study and fixated re-spectively with 30 retrograde medullary cannular lag screws through pubic tubercle to acetabular posterosu-perior on the left side and with 30 anterograde medullary cannular lag screws through acetabular posterosu-perior to pubic tubercle on the right side. Then, two-dimensional multiplanar CT reconstruction was done to measure the angle and length of the anterograde and retrograde medullary screw trajectory, the relationship of screws with acetabular bone and penis and determine optimal point and angle of screw insertion. Re-suits The entrance of the retrograde medullary screw was located at pubic tubercle, with vertical dimen-sion of ( 17.15±1.82) mm to pubic symphysis and that of (20.51±2.19) mm to superior margin of pu-bis. For the anterograde medullary screw, the distance from the entrance of the screw to greater sciatic notch was (33.25±2.35) mm, with safe insertion angle of (32.1±2.7)°of cephalon tilting at the sagittal plane and (46.5±3.6)°of lateral tilting at the coronal plane. The entrance angle of the anterugrade and retrograde medullary screw trajectory was similar, with only opposite direction and minor difference between the left and the right sides (P>0.05). The length of medullary screw trajectory was (119.5±2.2) mm, with insignificant difference between both sides ( P >0.05). The maximum diameter of the screw was 7.2 mm. Conclusions Medullary screw fixation of anterior acetabular column is clinically feasible but needs rather high accuracy and can be used as an alternative to plate fixation.

Objective To systematically evaluate the association between lactotransferrin(LTF) gene rs1126478 polymor‐phism and caries susceptibility .Methods The published literatures on the association between LTF gene rs1126478 polymorphism and caries susceptibility were retrived from the electronic databases of Pubmed ,Web of science ,Embase ,EBSCO ,Springerlink , CNKI ,VIP ,Wanfang and CBM by computer .The pooled odds ratios (ORs) and its 95% confidence intervals (95% CIs) were used as the effect indicators .The statistical analysis was performed by using the RevMan 5 .2 and Stata 12 .0 softwares .The bias evalua‐tion and sensitivity analysis were also performed .Results A total of 5 case‐control studies involving 720 cases and 412 controls were included .The meta analysis results showed that no statistical significance in the association between LTF gene rs1126478 pol‐ymorphism and caries susceptibility was revealed in all four genetic models (GG+ AG vs .AA :P= 0 .75 ,OR= 0 .93 ,95% CI=0 .59-1 .46 ;G vs .A :P=0 .88 ,OR=0 .97 ,95% CI=0 .68 -1 .38 ;GG vs .AA :P=0 .84 ,OR=1 .07 ,95% CI =0 .57 -1 .99 ;GG vs .AG+AA :P=0 .52 ,OR=1 .12 ,95% CI = 0 .79-1 .58) .Similarly ,the subgroup analysis by ethnicity showed no statistical sig‐nificance in the onset risk between Caucasian and Asian populations as well (both P>0 .05) .Conclusion The LTF gene rs1126478 polymorphism may have no relation with the susceptibility to caries .

Universities are cradles of leadership and full-developed specific professional.Besides specific courses,reasonable sexual health education should be set up to make the students succeed when they grow up.

Objective To observe the clinical effect of Salmeterol xinafoate and fluticasone propionate powder for inhalation in patients with chronic obstructive pulmonary disease.Methods 70 patients diagnosed with chronic obstructive pulmonary disease from March 2014 to March 2015, were randomly divided into two groups ( n =35 ) .Control group were given basic treatment, observation group was given Salmeterol xinafoate and fluticasone propionate powder for inhalation on the basis of control group , patients were followed up and changes of related indicators wererecorded. Results After treatment one month, serum airway remodeling index b-FGF, TIMP-1 values were (93.86 ±17.36 μg/L, 38.06 ±4.28ng/mL) respectively, more than control group(135.03 ±16.06μg/L, 53.95 ±4.15ng/mL)(P<0.05).After treatment one month, inflammatory markers IL-8, TNF-αwere(7.26 ±1.57 pg/mL, 4.29 ±1.02 ng/L)respectively, were more than the control group (14.27 ±1.71 pg/mL, 8.90 ±1.21 ng/L) (P<0.05).After treatment, the observation group, the total effective rate was 91.43%, higher than 77.14%(P <0.05).Conclusion Salmeterol xinafoate and fluticasone propionate powder for inhalation has good effect in treatment of chronic obstructive pulmonary disease , better than the use of basic treatment alone.

OBJECTIVE To study the incidence,pathogenesis,diagnosis and treatment of laryngeal cyst after partial laryngectomy.METHODS The clinical data of 228 cases of partial laryngectomy from January 2003 to June 2009 were retrospectively analyzed,and related literature was reviewed.RESULTS Two cases were found to have laryngeal cysts after partial laryngectomy during the post-operative follow-up.One occurred after 20 months,and the other occurred after 19 months.The cyst located on the tongue surface of the epiglottic was removed by CO2 laser under suspended laryngoscope,while the one located at the subglottic area was removed via cervical approach.So far,a total of 9 cases were reported.CONCLUSION Laryngeal cyst after partial laryngectomy is uncommon.That may be the mucosa planted during the operation.It could be misdiagnosed as recurrent laryngeal carcinoma.CT or MRI is helpful for diagnosis.Operation with CO2 laser under suspended laryngoscope or via cervical approach may be chosen.

Objective The article was to evaluate the efficacy of intra-articular tranexamic acid injection in reduction of blood loss and blood transfusion in total hip arthroplasty (THA). Methods 60 patients hospitalized from July 2011 to July 2013 were selected as research subjects , among whom 38 males and 22 females with 2-10 years'( an average of 6 years) duration of femoral head aseptic necrosis were treated with initial unilateral THA using the posterolateral approach .The patients were randomly divided into 2 groups:experimental group were treated with 100 mL intra-articular tranexamic acid injection after intraoperative suture of incision , control group received no topical tranexamic acid .Intraoperative blood loss , postoperative visible blood loss , blood transfusion , blood transfusion number , postoperative hemoglobin were taken as evaluation indexes to make comparison between the two groups . Results No significant differences were found in intraoperative blood loss between the two groups ( [ 200 ±60 ] mL vs [ 200 ±53 ] mL, P >0.05), but in comparison to control group, postoperation visible blood loss([140 ±45]mL vs [362 ±53]mL, P<0.05), blood transfusion([400 ±25]mL vs [750 ±50]mL, P<0.05) and blood transfusion number in group A were significantly decreased (P<0.05), and in terms of postoperative hemoglobin value ([95 ±15]g/L vs [81 ±12]g/L, P<0.05), experimental group was signifi-cantly higher than control group(P<0.05). Conclusion Topical tranexamic acid in total hip arthroplasty can significantly lower blood loss and blood transfusion in patients .

Objective To construct five shRNA-expression plasmids and to investigate the expression of Smad2 in TGF-?/ Smads signal transduction treated with shRNA-expression plasmid.Methods Five shRNA-Smad2 DNA sequences from mRNA sequence of mouse Smad2 gene were designed and synthesized.DNA oligonucleotides encoding an appropriate shRNA were inserted to shRNA expression vector respectively.Five shRNA-Smad2 expression plasmids were obtained and then transfected into NIH/3T3 cells.The suppressed expression of Smad2 was assessed by RT-PCR and Western-blotting.Results The shRNA-expression plasmid numbered 2.4 could markedly reduce the expression of Smad2.The suppression effect of the RNAi-pool composed of four different plasmids was more obvious than that of any single.Conclusion The shRNA-expression plasmids were successfully constructed,which could specifically and effectively suppress the expression of Smad2.The method of using a mixture of RNAi plasmids to improve the RNAi efficiency was established.

Objective To explore associations between SG13S114A/T and SG13S32A/C polymorphisms of ALOX5AP gene and the genetic susceptibility of ischemic cerebrovascular diseases (ICVD) in Henan Han population.Methods Two hundred and forty-six ICVD patients and 245 healthy controls were recruited from Han population in Henan province. Polymorphisms of SG13S114A/T and SG13S32A/C in ALOX5AP gene were genotyped in these samples by SnaPshot minisequencing method.Each genotype frequency and allele frequency were statistically analyzed and compared between ICVD group and control group using SPSS16.0 software.Haplotype and linkage disequilibrium were analyzed by SHEsis software.Results The SG13S114 AA genotype frequency ( 18.7％ ) and A allele frequency (41.3％) in ICVD group were significantly higher than those in control group (9.0％ and 32.7％,respectively; P =0.002 and P =0.005 ).It was also found that in male ICVD group and in younger ICVD group ( ＜50 years old),the SG13S114 AA genotype frequencies (22.1％ and 22.0％,respectively) and A allele frequencies (42.1％ and 42.7％,respectively) were significantly higher than those in male control group and younger control group (SG13S114 AA genotype:9.0％ and 8.9％ ; P =0.010 and P =0.006,respectively) ;A allele frequencies,34.0％ and 32.0％ ; P =0.048 and P =0.020,respectively.Finally,the prevalence of A-A haplotype in ICVD group was significantly higher than that in control group(30.4％ vs 23.5％,OR =1.419,95％ CI 1.068-1.885,P =0.015).T-C haplotype frequency of ICVD group was significantly lower than that in control group (22.0％ vs 28.8％,OR =0.698,95％ CI 0.523-0.932,P =0.014 ).Conclusions The A allele in SG13S114 loci of ALOX5AP may be a genetic risk factor for ICVD in Han population in Henan province.The association is predominant in ICVD patients of male and younger than 50 years old.Maybe A-A haplotype increases the risk of ICVD and T-C haplotype and has a protective effect against ICVD in Henan Han population.

Objective To investigate the effect of L-selectin in experimental allergic encephalomyelitis (EAE) of Wistar rats.Methods The rats were randomly divided into four groups;the normal group,the CFA group, the LMS group and the model group;The animal models were established in rats by immunization with myelin basic protein of spinal cord of guinea pig and complete Freund's adjuvant(CFA).The symptom of EAE was observed; pathological feature and myelin of brain and spinal were detected with HE stain and Loyez's stain respectively.The number of positive vessels of L-selectin expression was detected by immunohistochemistry.Results 100% experimental Wistar rats treated with MBP and levamisole developed EAE,but none of the other groups.The number of positive vessels of L-selectin expression was (31.86 ± 1.39) in model group, obviously higher than that of in the normal group (1.38 ±0.18) ,the CFA group( 1.50 ±0.27) and the LMS group(7.25 ±0.59) (all P <0.05) ;The inflammation cells were found around vessels and demyelination were seen in white matter of brain and spinal cords.Conclusion The expression of L-selectin should play an important role in EAE.

Objective To investigate the pathogenesis of gallbladder chaotic dynamics after partial gastrec-tomy. Methods 140 cases operated by partial gastrectomy after 6 months were randomly examined, they in-cluded one group of 40 cases by Billroth type and the other 100 cases by Eiselsberg type. The ultrasonograph was applied to evaluate the function of gallbladder dynamics and radio-immunity method to determine the content of CCK at the time of having no food and 30 minutes after med. Results BV and RV of Eiselsberg group were bigger than Billroth Ⅰ obviously P<0.05. Gallbladder contraction rate displayed not well obvi-ously as too. The plasm level of CCK had no manifested distinctions in empty stomach cases of the 2 groups, but the increasing gradient plasm level of CCK in Billroth Ⅰ exceeded Eiselsberg type. Conclusions The pathogenesis of gallbladder chaotic dynamics after partial gastrectomy was correlated with the alterative type of partial gastrectomy, the reduction of CCK plasm level, the damage of anterior vagal trunk hepatic branches during the operations and so on led to the disorder of gallbladder emptying and induced cholecystolithiasis.