Objective To analyze the genotype distribution of human papillomavirus( HPV) strains and their epidemiological characteristics in cervixes of Chinese females. Methods Pertinent litera-tures published during 2004 to 2013 were screened from PubMed,China National Knowledge Infrastructure (CNKI)and Wanfang database for data analysis. Results There were 245 studies screened out for the me-ta-analysis. A total of 661 658 cases met the inclusion criteria,ranging from 16 to 87 years old. All prov-inces and territories of China were covered by the data. The overall rate of HPV infection in cervix was 25. 0% among Chinese females. The predominant high risk genotype of human papillomavirus strains was HPV16,followed by HPV52,HPV58,HPV18,HPV33 and HPV31. HPV52 and HPV58 genotypes were more prevalent than HPV18 genotype. HPV35 and HPV45 genotypes were less popular. Conclusion The study suggested that the HPV infection showed obvious regional differences in genotypes. The genotype dis-tribution of HPV infection in China was different from that in other regions of the world. There were differ-ences with genotype distribution of HPV strains among seven geographic regions of China.

Objective:To explore the effect of tectorigenin on myocardial fibrosis(MF) in the rats and clarify the related mechanism,and to provide reference for its clinical application. Methods:Sixty Wistar rats were randomly divided into normal control group,model group,positive drug (capropril) control group, and low,middle,high doses of tectorigenin groups(n=10).Except normal control group, the rats in other groups were used to construct MF models by subcutaneous injection of 5 mg·kg -1·d -1 isoproterenol (Iso) for 7 d.The rats in tectorigenin groups and captopril group were intragastricly administrated with different doses of tectorigenin (25,50,100 mg·kg-1·d-1)and captopril(10 mg·kg -1·d -1) from the second day after modeling for consecutive 28 d.Bl-420E+ biological function experiment system was used to detect the heart function;Heart mass index (HMI) and left ventricular mass index (LVMI) were measured after experiment.UV detection was used to measure the levels of malondialdehyde (MDA) and the activities of superoxide dismutase (SOD) in myocardial tissue.Microplate reader was used to measure the activities of lactic dehydrogenase(LDH) and creatine kinase(CK) and the levels of nitric oxide (NO)in serum.ELISA were used to detect the levels of collagen typeⅠ(ColⅠ) and collagen type Ⅲ (Col Ⅲ) in myocardium tissue of the rats.The pathological changes of myocardium tissue of the rats in various groups were observed by HE staining.Results:Compared with normal control group,the HR of rats in model groups was increased,and the left ventricular systolic pressure (LVSP) was decreased(P<0.01);the HMI and LVMI were increased(P<0.05),the levels of MDA in left ventricular myocardial tissue was increased(P<0.01),and the activity of SOD was decreased,the levels of serum ColⅠ,Col Ⅲ and the activities of LDH , CK were also increased(P<0.01);the level of NO in serum was decreased(P<0.01).Compared with model groups, the HR were decreased,LVSP were increased, and HMI and LVMI of the rats in different doses of tectorigenin groups were decreased in a dose-dependent manner;the levels of MDA were reduced;the activities of SOD were increased in myocardium tissue,and the CK activities and the ColⅠ and ColⅢ levels were decreased(P<0.05 or P<0.01);the LDH activities in middle and high doses of tectorgenin groups were decreased(P<0.01);and the levels of NO in serum in different doses of tectorigenin groups were significantly increased(P<0.05 or P<0.01) .Conclusion:Tectorigenin could inhibit the MF induced by Iso in the rats, and its mechanism may be related to antioxidation,scavenging free radical and inhibition of collagen synthesis.

Administration, Oral ; Adolescent ; Female ; Histiocytosis, Langerhans-Cell ; complications ; drug therapy ; pathology ; Humans ; Lymph Nodes ; pathology ; Prednisone ; administration & dosage ; therapeutic use ; Retrospective Studies ; Skin Ulcer ; drug therapy ; etiology ; pathology ; Thalidomide ; administration & dosage ; therapeutic use ; Treatment Outcome

HSP90, which is the biomarker of cell stress and endogenous protective protein, functions as a molecular chaperone. Many client proteins of HSP90, including EGFR, Met, Raf-1, IKK and p53, play important roles in the occurrence and development of tumor. Binding of HSP90 inhibitors triggers the deactivation of HSP90, resulting in client protein degradation, and hence inhibits the tumor growth by blocking multiple targets involved in signaling of tumor proliferation. This review summarizes recent development of small molecule inhibitors bound to N-terminal of HSP90.
Antineoplastic Agents ; chemistry ; HSP90 Heat-Shock Proteins ; antagonists & inhibitors ; Humans ; Neoplasms ; Signal Transduction

Objective To construct and identity pSIREN-HIF-1α/shRNA expression vector in order to make foundation of gene therapy for further exploration of RNA interference to nasopharyngeal darcinoma. Methods According to HIF-1αcDNA gene sequence in the gene bank (NM_001530/NM_181054), a pair of 60 nt oligonucleotides each containing the sites of restriction endonuclease at both ends,were designed and synthesized by Reynolds design principles. Oligonucleotides were annealed and ligated with linedrized RNAi-Ready pSIREN-RetroQ-ZsGreen.Transfected into JM109, the recombinants were finally sequenced and identified by 1%agarose gel electrophoresis. Results The size of the target gene fragment amplified by PCR was 470 bp and in accordance with the expected result.pSIREN-HIF-1α was successfully constructed and identitfied by 1%agarose gel electrophoresis.Sequence analysis of inserted fragment revealed the same sequence as synthesized shRNA Oligonucleotides. Conclusion pSIREN-HIF-1α /shRNA expression vector has been successfully constructed, and can make the foundation of research using liposome packaging transfectiing nasopharyngeal darcinoma cell for the next step .

Objective To investigate the effects of single dose of dexmedetomidine and fentynyl on treatment of emergence agitation in adult patients after general anesthesia.Methods Sixty patients suffering from emergence agitation after general anesthesia were divided into two groups randomly(n=30 each):dexmedetomidine group (group D)and fentaynl group (group F).Patients in group D received dexmedetomidine at a dose of 0.5μg/kg,and those in group F received fentanyl at a dose of 1μg/kg respectively.If patients still agitate after above treatment,intermission infusion of propofol at bolus of 1.0 mg/kg was used for further treatment till patients attain peaceful state.Results Twen-ty-nine paients in group D had no agitation,only one patient had mild agitation after administration of dexmedetomidine,while four patients had severe agitation,four patients had moderate agitation and 9 patients had mild agitation after administration of fentanyl(P<0.05);the time from first treatment to no agitation in group D was (11±3)min,shorter than that in group F (27±9)min (P<0.05);the dose of propofol used in group D was (50±0)mg,less than accumulative doses of propofol in group F (270±40)mg (P<0.05);21 (70%)patients in group D had radycardia and 9 (30%)patients in group F had respiratory depression(P<0.05).Conclusion Intravenous dexmedetomidine at a dose of 0.5 μg/kg attainted was effective in treating emergence agitation in adult patients after general anes-thesia as compared with fentanyl.

Objective To investigate the epidemiology of bacterial infections after liver transplantation and anaIyze the antimi- crobial susceptibility of major pathogens to provide reference for clinical therapy.Methods A retrospective survey was conduc ted in 174 patients who underwent liver transplantation during 2001 and 2004.Identification and susceptibility of pathogens were assayed by Microscan Walkaway 40 Automatic System.Results Infection was identified in 59.8% of the 174 patients after liver transplantation.A total of 218 non-duplicate strains were isolated.Most infections were caused by single pathogen.The infection was frequently identified in respiratory tract,biliary tract,blood stream or intra-abdominal cavity.The top 5 patho- gens were Acinetobacter baumannii,Staphylococcus aureus,Pseudomonas aeruginosa,Stenotrophomonas maltophilia and Escherichia coli.Gram-negative bacilli were usually resistant to multiple antimicrobial agents,but less resistant to piperacillin- tazobactam or imipenem.Most of S.aureus isolates were methicillin-resistant,which were susceptible to vancomyein.Conclu- sions Pathogens of postoperative infections in liver transplantation recipients are mostly multi-drug resistant.The microbiologi- cal surveillance is important for guiding clinical therapy.

OBJECTIVETo investigate the role of mutated mismatch repair gene hMSH2 and mutant p53 gene in the carcinogenesis and development of sporadic digestive tract tumors.

METHODShMSH2 gene in normal and tumor tissue of 30 digestive tract tumor specimens was examined using polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) silver staining. The PCR product with an abnormal strand was sequenced directly. Mutant p53 protein in the tumor tissue was analyzed immunohistochemically.

RESULTSSix patients were identified as having mutated strands, three on hMSH2 exon 1 and three on hMSH2 exon 5. DNA sequencing revealed that all 6 patients had mutated basic groups that led to decrease in function of the hMSH2 protein. Forty percent (12/30) of patients were p53 positive. The frequency of mutated hMSH2 in p53 positive patients (41.7%) was significantly higher than in p53 negative patients (5.6%, P < 0.05).

CONCLUSIONThe mutation of hMSH2 plays an important role in the carcinogenesis and development of digestive tract tumors through stimulating p53 mutation.

DNA-Binding Proteins ; Digestive System Neoplasms ; genetics ; Genes, p53 ; Humans ; Immunohistochemistry ; MutS Homolog 2 Protein ; Mutation ; Polymerase Chain Reaction ; Polymorphism, Single-Stranded Conformational ; Proto-Oncogene Proteins ; genetics ; Tumor Suppressor Protein p53 ; analysis

BACKGROUND: Low frequency-pulsed electromagnetic fields (LF-PEMFs) have been confirmed to not only treat delayed bone union or nonunion, but also be effective for fresh bone fractures, ostectomy and fatigue fractures.OBJECTIVE: To systematically evaluate the efficacy and safety of LF-PEMFs for bone healing.METHODS: CNKI and PubMed databases were retrieved for the randomized controlled trials concerning LF-PEMFs promoting bone healing published from January 1985 to May 2016. Meta-analysis was conducted on RevMan 5.1 software after data management and quality assessment.RESULTS AND CONCLUSION: Thirteen eligible literatures were enrolled, involving 1244 patients. Meta-analysis showed that the overall effectiveness and bone mineral density in the LF-PEMFs group were significantly higher than those in the control group. The healing time in the LF-PEMFs group was significantly shorter than that in the control group. These results suggest that LF-PEMFs show high efficacy and safety for bone healing, and also can markedly shorten the healing time. However, more high-quality multi-center, large-scale randomized controlled trials are still needed to testify all above conclusions.

Objective To observe the effect of T-2 toxin on growth and development of rat epiphyseal plate of left knee and metaphyseal bone of femur and tibia in normal and low nutritional status, to find out possible pathogenic factors of Kashin-Beck disease and provide experimental basis for early intervention. Methods Ninety 3-week-old Wistar rats, weighing 60 - 70 g, were randomly divided into three groups: control group(general feed), T-2 toxin + general feed group, T-2 toxin + low nutrition feed group, thirty rats in each group with equally sex ratio. T-2 toxin (1.0 mg/kg) was administered orally 5 times a week via a gavage needle for 4 weeks. The change of hair, activity and body weight was observed. After 1, 2, 4 weeks, the epiphyseal plate of left knee and metaphyseal bone of femur and tibia (including distal femur and proximal tibia) were collected. Specimens were processed with HE and Masson staining. The morphology of chondrocytes and matrix collagen content in epiphyseal plate was observed. Trabecular bone volume fraction in tibial metaphyseal bone was analyzed by Image-Pro Plus 6.0 software. Results In the control group, rats were in good movement and hair with light, but in T-2 toxin + general feed group and T-2 toxin + low nutrition feed group, rats were found with reduced activities and hair with dark color. Body weights(g) of the control group, the T-2 toxin + general feed group and the T-2 toxin + low nutrition feed group were 81.0 ± 6.2, 79.0 ±5.1, 77.0 ± 7.5, respectively, by the end of first week; 101.8 ± 6.7, 97.0 ± 6.8, 93.0 ± 5.3, respectively, by the end of second week; 151.1 ± 15.7, 126.5 ± 11.9, 106.5 ± 11.5, respectively, by the end of fourth week. There was significant difference in groups by second week and the fourth week (F = 9.72, 41.65, all P ＜ 0.05 ). There was significant difference among multi-groups by the fourth week(all P ＜ 0.01 ). Under light microscope, at the second weeks, coagulative necrosis of chondrocytes was found in hypertrophic zone in the two groups with T-2 toxin; at the fourth weeks, cell necrosis increased. Masson staining showed collagen staining in the two groups with T-2 toxin significantly turned to clear pale coloration, indicating that the collagen matrix was significantly reduced. Image analysis showed there was significant difference in groups at the second and fourth week(F= 9.72, 41.65, all P＜ 0.05)in tibial metaphyseal trabecular bone volume fraction. There was significant difference between T-2 toxin + low nutrition feed group[(0.55 ± 0.12)％, (0.21 ± 0.0)％] and control group[(0.67 ± 0.09)％, (0.51 ± 0.14)％] by the second and fourth week(all P ＜ 0.01 ). Conclusions Under normal nutritional status, T-2 toxin can induce hypertrophic epiphyseal cartilage necrosis, collagen content decreased in epiphyseal plate, metaphyseal trabecular bone formation disorders; in the low nutritional status, T-2 toxin can lead to rat epiphyseal necrosis and significant metaphyseal bone disorder, but whether the performance is related to Kaschin-Beck disease needs to be studied further.