Heparinases,a kind of polysaccharide lyases,can degrade heparin and heparin sulfate to low molecular weight polysaccharides.It has been noted that many bacteria have heparinases although only few of them have been purified and characterized.Heparinases I,II and III from Flavobacterium heparinum have been extensively studied for many years and been commercialized recently.Heparinases have some important applications in the industry and clinic as well as in the determination of heparin structure,which is a very important anticoagulant drug used world-widely.The recent progresses in isolation of heparinase-producing bacteria,genome mapping of heparinase homologs in sequenced bacteria and archaea genomes,purification of heparinases and the study of their biochemistry and regulation were reviewed.The recombinant expression of these enzymes as well as important applications of heparinases and their potential applications in the future will also be highlighted.

Objective To study the difference in therapeutic effects and side effects of ibuprofen versus indomethacin for symptomatic patent ductus arteriosus (PDA) in the premature infants.Methods Meta analysis was used to qualitatively and quantitatively evaluate the data extracted from 6 public papers about comparative study of ibuprofen and indomethacin.Results The rate of ductal closure was similar with the two treatment regimes (intravenous ibuprofen and indomethacin).In side effects on PDA,the incidence of oliguria induced by ibuprofen was significantly lower than that of indomethacin though there were no difference in other side effects.Conclusions The efficacy of ibuprofen for the early treatment of PDA in preterm infants is similar with indomethacin,and has low incidence of oliguria.

OBJECTIVETo evaluate the prognostic effects of neoadjuvant chemotherapy (NAC) in patients with local advanced gastric cancer.

METHODSWe retrospectively analyzed prognosis in 191 patients with advanced gastric cancer, of whom 71 were treated with NAC and 120 received surgery only between February 2007 and July 2013. Postoperative complication rate was recorded. Survival by clinicopathological features, pathological T and N stages, and histopathological tumor regression was retrospectively compared between the two groups.

RESULTSAccording to Response Evaluation Criteria in Solid Tumors, none of the 71 patients in the NAC followed by surgery group showed complete response, 36 showed partial response, 25 had stable disease, and 10 had progressive disease. The chemotherapy response rate was 50.7%; the disease control rate was 85.9%. Grade 3/4 adverse events were seen in less than 20% patients, with acceptable toxicities. No difference was found in the overall postoperative complication rates between the two groups (7 versus 22 cases, P=0.18). Median survival time was significantly different, at 54 months in the NAC combined with surgery group and 25 months in the surgery-only group (P=0.025).

CONCLUSIONIn patients with operable gastric adenocarcinomas, NAC can significantly improve overall survival without increasing surgical complications.

Adult ; Aged ; Female ; Humans ; Male ; Middle Aged ; Neoadjuvant Therapy ; Prognosis ; Retrospective Studies ; Stomach Neoplasms ; drug therapy ; mortality ; pathology

Objective To investigate the variance of cost-effectiveness when treat acute myocardial infaretion of different severe extents with different pattern.Methods Acute myocardial infarction patients were selected from emergency eommand center of Guangzhou from October 2003 to December 2005.These patients wew assigned by the center to First-Class Hospitals at Grade 3 and First-class Hospital at Grade 2,and were followed up after 6 months after post-discharge.Cost in hospital and mortality in hospital were registered.The health of all patients were quantificated using SF-36.According to the assigned hospitals,the patients were divided into single infarction group and complex infarction group.Cost in hospital,mortality in hospital,short-term quality of life were compared between the them.Results Compared with and First-Class Hospital at Grade 2 (101 cases),the single infarction patients in First-Class Hospitals at Grade 3 had higber costs in hospital (P=0.016),better society function,affection role,mental health and health status (P

Objective To optimize the formulation of paeonol nanostructured lipid carrier (NLC) thermosensitive in situ gel through Box-Behnken response surface method; To investigate its release properties in vitro to provide references for the study of transdermal drug delivery system. Methods Taking mass fraction of poloxamer 407 and poloxamer 188 as the factors, the gelling temperature as the index, the mathematical relationship between the gelling temperature and two factors was established by binomial model and multivariate linear regression model. The Box-Behnken response surface method was used to optimize the formulation of paeonol NLC thermosensitive in situ gel, and the in vitro release characteristics of the preparation was investigated. Results There was a credible quantitative relationship between the gelling temperature and the 2 factors, and the binomial model was more reliable than the multivariate linear model. The best prescriptions of paeonol NLC thermosensitive in situ gel were 22.90% poloxamer 407 and 3.34% poloxamer 188; gelling temperature was (33.4±0.1)℃, and the cumulative release amount of paeonol in situ gel in 24 h was 51.19%. Conclusion This method is suitable for the formulation optimization of paeonol NLC thermosensitive in-situ gel, and the established mathematical model has good predictability. The optimized formulation can provide references for the development of paeonol transdermal preparation.

Objective:To compare acquired immune deficiency syndrome (AIDS) related knowledge, attitudes, behaviors and their influencing factors among college students in different years in Beijing, and to provide evidence for targeted health education among college students in future.Methods: College students were selected by the stratified cluster sampling method, and a questionnaire survey was conducted among college students in year 2006 and 2016 in Beijing.The sample sizes were 1 800 and 3 001 college students, respectively.The contents of the questionnaire included: socio-demographic characteristics, AIDS related knowledge, AIDS related attitude, sex intercourse and its related risk behaviors, condom use intension, and AIDS related health education.Results: Compared with the year 2006, the average AIDS knowledge scores of college students in year 2016 dropped from 12.78±1.95 to 11.90±2.56 (t=12.91, P<0.05), and the correct answer rates of questions in the knowledge part were decreased, too.Except for belief on condom use, the college students were more negative on AIDS related attitude and self-efficacy in year 2016 than in year 2006.Among the students who had sex experience, the rates of commercial sex [17.65% (33/187) vs.6.53% (16/245), χ2=13.003, P<0.001] and the rates of homo-sexual intercourse [15.43% (29/188) vs.4.13% (10/242), χ2=16.356, P<0.001] were higher in year 2016 than in year 2006.The main way for the students seeking pornographic information was changed from books to internet (41.15%) in 2016 compared with the year 2016.In 2016, the influencing factors of intention on condom use were male (OR=0.713), self-efficacy of condom purchase (OR=0.876), never received sex education before college (OR=0.752), self-efficacy of condom use (OR=1.135), belief of condom use (OR=1.775), and attitude towards AIDS patients (OR=1.136).Conclusion: AIDS related knowledge, attitudes and behaviors among college students have been changed, AIDS related health education should be designed and improved based on new characteristics of college students.AIDS health education in colleges should pay more attention to sex attitude and sex responsibility and self-protection awareness among college students as well.

Objective To evaluate the diagnostic value and safety of domestic electromagnetic navigation bronchoscopy (ENB) guided transbronchial lung biopsy (TBLB) for peripheral pulmonary lesions.Methods Sixty-four patients with peripheral pulmonary lesions shown by thoracic CT in Zhongshan Hospital,Fudan University between Jul.and Dec.,2014 were collected.The patients were randomly assigned to test group (underwent ENB in combination with X-ray guided TBLB) and control group (underwent X-ray guided TBLB).The final diagnosis was confirmed by pathologic examination of surgically removed lesions or by 24 months clinical follow-up.The operative time as well as the intraoperative and postoperative complications were also recorded.Results Sixty-four patients had 70 peripheral pulmonary lesions.There was no difference in age,sex,the lesion size or location between the two groups.Pathology results showed that the diagnostic yield of test group and control group were 88.6％ and 62.9％,respectively,with statistical significance (P =0.012).Subgroup analysis showed that if the lesion's diameter was ≤2 cm,the diagnosis yield of test group was higher than control group (66.7％ vs.20.0％,P =0.266);if the lesion was ＞2 and ≤3 cm,the diagnosis yield of test group and control group were 100 ％ and 81.8 ％,respectively (P =0.485).But if the lesion was＞3 cm,the diagnostic yield of the 2 group was significantly different (94.4 ％ in test group,63.1％ in control group,P =0.042).Mean operation duration of the 2 group was (966 ± 372)s and (1 040 ± 470) s,respectively,with no statistical difference (P =0.600).However,there was statistical difference between the 2 groups on the X-ray time needed to find the pulmonary lessions [(7.0 ± 4.8)s vs.(37.0 ± 37.5) s,P =0.008).There was no pneumothoraxes and excessive bleeding in patients undergoing ENB.Conclusions Compared with X-ray guide TBLB,ENB guided TBLB for peripheral pulmonary lesions has a certain degree of security,and has superiority in reducing the X-ray time required to find the lesion and improving diagnostic yield especially when the lesion's diameter was ＞3 cm.

ObjectiveTo explore the curative effect in the patients with internal endometriosis by interventional therapy.MethodsUsing Seldinger technique,34 cases with internal endometriosis wereperformed bilateral uterine artery embolization.Observed postoperative menstrual quantity,dysmenrrhea degree,anemia and the change of the volume of uterine lesions.ResultsAll the patients were followed up for 1-3 years,menstrual quantity average decreasd of 59.1％P ＜ 0.05 ),the symptoms of dysmenorrhea was significantly eased in 28 cases (82.4％,28/34).All the patients of anemia haemoglobin were back to normal,volume of uterus average reduced 43.8％P ＜ 0.05 ),lesion was obviously smaller or disappear.Ultrasonography showed myometrium and blood flow signal of lesion was was obviously reduced.Conclusion Internalendometriosis by interventional therapy can get good results,symptoms improve significantly.

Comparative analysis of variable region ORF14/15 genes of white spot syndrome virus (WSSV) genome in Guangxi Penaeus vannamei (P. vannamei) could provide useful information for the evaluation of genetic diversity and genetic evolutionary relationship among WSSV isolates from Guangxi, China and other places. Based on geographical and temporal considerations, 40 WSSV-positive P. vannamei samples were collected during the period between May 2010 and July 2013 from Beihai, Qinzhou, and Fangchenggang, which were the main P. vannamei production areas in Guangxi, and the variable region ORF14/15 genes of the WSSV genome from all infected samples were amplified by PCR and then subjected to cloning and sequence analysis. Pairwise and multiple alignment analysis was then conducted to evaluate the degree of genetic divergence between different strains. The variable region ORF14/15 genes from 25 of 40 WSSV positive samples were successfully cloned and sequenced; among the ORF14/15 genes of 25 WSSV-positive strains, 22 was 619 bp in length and 3 was 620 bp. All the 25 Guangxi strains carried a 5949-bp deletion in the ORF14/15 region relative to TH-96-II, which has the longest nucleotide sequence in this region; the deletion of Guangxi strains occurred in the middle region of ORF14/15 gene, with only 190 bp and 429 bp/ 430 bp at 5' and 3' ends, respectively, which were coincident with WSSV-IN-05-I in deletion length and position. Sixteen of 25 Guangxi strains had completely identical nucleotide sequences in the variable re gion, and the homology between other strains also exceeded 97.9%. There were single nucleotide substi tution, deletion, and insertion in the ORF14/15 region of Guangxi strains compared with other strains in GenBank. In the phylogenetic tree based on WSSV variable region ORF14/15, the Guangxi strains were closely related and formed a separate branch with Indian strain IN-05-I, but far from other strains in GenBank. The ORF14/15 gene of WSSV isolates in cultured P. vannamei in Guangxi has a large deletion in the middle of the variable region, and the Guangxi WSSV strains show no significant spatio-temporal differences; the Guangxi strains are closer in genetics to Indian strain IN-05-I than other strains in GenBank.
Animals ; China ; Cloning, Molecular ; Evolution, Molecular ; Genome, Viral ; genetics ; Genomics ; Penaeidae ; virology ; Phylogeny ; White spot syndrome virus 1 ; genetics

Objective To investigate the relationship between myocardial ischemia and slow coronary flow phenomenon with 99Tcm-methoxyisobutylisonitrile (MIBI) adenosine myocardial perfusion SPECT imaging. Methods Forty-four patients were divided to three groups according to the result of coronary angiography(CAG). There were GAG-positive(P-GAG) (n=12),slow coronary flow (CSF) (n =22),and normal coronary flow (NCF) (n = 10). Results of adenosine myocardial perfusion imaging were compared among these three groups. Semi-quantitative visual scoring method was used to evaluate the myocardial perfusion:0 = normal,1 = mild decrease,2 = moderate decrease,3 = severe decrease,4 = defect. Statistical analysis was performed using variance analysis,t-test and x2-test. Results No significance was observed at age ( t =0.27,0. 54 and 0. 59),sex (x2 = 0. 92),hypertension,hyperlipemia and diabetes (x2 = 1.23,all P ＞ 0.05 ) among the three groups. A significantly higher frames of the coronary thrombolysis in myocardial infarction (TIMI) flow was noted in CSF than in NCF groups (33.7 ±5.5 vs 17.6 ±3.9,t = 9. 58,P ＜0. 001 ). The positive adenosine myocardial perfusion imaging rate were significant among these three groups with 100% (12/12) in P-CAG group,77.3% (17/22) in CSF group,and 20% (2/10) in NCF group. When using semi-quantitative visual scoring method,significantly higher average ischemia segments were noted in CSF group than in NCF group ( 1.06 ± 0.77 and 0. 91 ± 0.80,t = - 2. 02,P ＜ 0. 05 ),but was less than that in P-CAG group (2.41 ±0.79,t =4. 54,P ＜0.001 ). The degree of ischemia of CSF group was higher than that in NCF group ( 8.01 ± 6.06,and 2.73 ± 2.60,t = - 2.07,P ＜ 0.05 ) and was less than that in P-CAG group (14. 07 ±12. 77 ,t=1.44,P＞0. 05). Conclusion Slow coronary flow phenomenon can be detected by adenosine myocardial perfusion image to offer the evidence of diagnosis and treatment for the chest pain patients with negative coronary angiography results.