0.05),but the proportion of NRDS,the rate of mechanical ventilation dependence,and mortality had significant diffe-rences(Pa

OBJECTIVETo compare the protein profiles between decapeptide-treated and untreated planktonic cells of Streptococcus mutans (S. mutans) by differential proteomic analysis to determine and identify the key proteins.

METHODSIn our previous study, we investigated decapeptide (KKVVFKVKFK-NH2), which was a novel adenosine monophosphate. Compared with other oral pathogens tested, decapeptide had a preferential antibacterial activity against S. mutans. It also inhibited S. mutans biofilm formation and reduced the one-day developed biofilm. In the present study, we first synthesized decapeptide, and then compared the protein profiles between decapeptide-treated and untreated planktonic cells of S. mutans by two-dimensional gel electrophoresis and matrix-assisted laser desorption ionization time-of-flight mass spectrometry. We also verified different expressions of key protein enolase in the protein level.

RESULTSThe results showed that decapeptide altered the protein expression of planktonic S. mutans. These proteins were functionally involved in carbohydrate degradation by glycolysis, protein folding, conjunction, transport, translation, adenosine triphosphate binding, protein binding, sequence-specific DNA binding, transcription factor activity, and two-component response regulator activity. Western blot results showed that enolase protein expression decreased obviously in decapeptide-treated cells of S. mutans.

CONCLUSIONThe protein expression of S. mutans significantly changed after synthetic antimicrobial decapeptide treatment, suggesting that decapeptide may present a preferential effect on oral caries by changing the expression of certain key proteins, such as enolase protein.

Anti-Bacterial Agents ; Anti-Infective Agents ; Biofilms ; Dental Caries ; Depsipeptides ; genetics ; Electrophoresis, Gel, Two-Dimensional ; Oligopeptides ; genetics ; Proteomics ; Streptococcus mutans ; metabolism

OBJECTIVEThis study aims to evaluate the antimicrobial activity of decapeptide, a novel antimicrobial peptide, against several major cariogenic and periodontopathogenic bacteria in vitro. METHODS In this study, we investigated the antimicrobial activity of decapeptide against Streptococcus mutans (S. mutans), Streptococcus sobrinus, Lactobacillus acidophilus, Streptococcus sanguis, Streptococcus gordonii, Actinomyces viscosus, Actinomyces naeslundii, Porphyromonas gingivalis, Prevotella intermedia, Fusobacterium nucleatum, Actinobacillus actinomycetemcomitans, and Saccharomyces albicans in vitro using the agar diffusion method and broth dilution method. Furthermore, a time-kill kinetic study of decapeptide against S. mutans was performed.

RESULTSThe results showed that decapeptide exhibited antimicrobial activity against various oral bacteria and fungi. The minimum inhibitory concentration (MIC) of main cariogenic bacteria ranged from 62.5 μg · mL(-1) to 125 μg · mL(-1), and the MIC of periodontopathogenic bacteria tested ranged from 250 μg · mL(-1) to 1,000 μg · mL(-1). Among the bacteria tested, decapeptide had a strong inhibitory effect on cariogenic S. mutans. Results of the time-kill kinetic studies showed that decapeptide reduced the viable counts of S. mutans by more than one order of magnitude after 20 min of incubation, and thoroughly killed S. mutans after 30 min. No viable cells could be detected after 24 h of incubation.

CONCLUSIONThis study suggest that decapeptide might have potential clinical application in treating dental caries by killing S. mutans within dental plaque.

Aggregatibacter actinomycetemcomitans ; Anti-Bacterial Agents ; Anti-Infective Agents ; Bacteria ; Dental Caries ; Dental Plaque ; Kinetics ; Microbial Sensitivity Tests ; Mouth ; microbiology ; Porphyromonas gingivalis ; Streptococcus mutans

The diagnosis and treatment of prostate cancer are being improved due to the popularized screening of prostate specific antigen. Advanced prostate cancer, in spite of its response to androgen deprivation therapy, may finally develop into castration-resistant prostate cancer (CRPC) and shorten the overall survival of the patients. Many efforts have been made by worldwide researchers for new approaches to the management of CRPC, including new hormonal therapy, cytotoxic chemotherapy, immunotherapy, and bone metastasis-targeted therapy. This paper reviews the emerging agents undergoing clinical evaluation and drugs that have received approval for the treatment of CRPC in order to provide doctors and patients with more treatment options for CRPC and improve the overall survival rate and quality of life of the patients.
Androgen Antagonists ; Bone Neoplasms ; prevention & control ; Humans ; Immunotherapy ; Male ; Prostate-Specific Antigen ; blood ; Prostatic Neoplasms, Castration-Resistant ; therapy ; Quality of Life

OBJECTIVE:To observe clinical efficacy and safety of tanshinone combined with limbal stem cells transplantation in the treatment of pterygium. METHODS:Totally 97 cases (118 eyes) of primary pterygium admitted into our hospital during Feb. 2010-Sept. 2014 were analyzed retrospectively,and divided into observation group (48 cases,57 eyes) and control group (49 cases,61 eyes). Both groups received autologous limbal stem cell transplantation. The control began to give Tobramycin and dexamethasone eye drops 1-2 drop 1 week before surgery,every 4-6 h one times. Observation group was given Tanshinone cap-sules 0.5 g,po,tid,one week before surgery,for 3 months. Repair time of corneal epithelium and local symptom regression time were compared between 2 groups. Corneal astigmatism and corrected visual acuity were observed in 2 groups before and 1,3 months after surgery. The occurrence of recurrence and ADR was analyzed statistically in 2 groups. RESULTS:The repairing time of corneal pithelial and local symptom regression time in observation group were significantly shorter than control group,with statis-tical significance (P<0.05). There was no statistical significance in corneal astigmatism and corrected visual acuity between 2 groups before and one month after surgery (P>0.05). 1,3 months after surgery,corneal astigmatism of 2 groups was decreased significantly and corrected visual acuity was increased significantly than before surgery,and 3 months after surgery the observation group was significantly better than the control group,with statistical significance (P<0.05). The recurrence rate of observation group was 3.51%,which was significantly lower than 14.75% of control group,with statistical significance(P<0.05). There was no statistical significance in the incidence of ADR between 2 groups(P>0.05). CONCLUSIONS:Tanshinone combined with autol-ogous limbal stem cell transplantation in the treatment of pterygium can shorten the time of corneal epithelial repair and local symp-toms,restore the visual function of patients and reduce recurrence rate with good safety.

Objective:To prepare and purify siRNA targeting a proliferation-inducing ligand targeted(APRIL-siRNA),so as to provxde a basis for studying the role of APRIL in human pancreatic cancer.Methods:pET-22b-APRIL was constructed to express APRIL dsRNA of human pancreatic cancer cell line CFPAC-1 in E.coli and the product was purified by chromatography using CF-11 column.APRIL dsRNA was digested by RNaseⅢto prepare APRIL siRNA,then the reaction mixture was loaded onto a DEAE ion exchange chromatography to remove RNaseⅢfrom oligonucleotides,and size exclusion chromatography was used to purify 21 bp siRNA.The purified APRIL siRNA was used to transfect Chinese hamster ovary(CHO)cells and the expression of APRIL in CHO cells was observed under fluorescence microscope Results:APRIL dsRNA was successfully expressed in E.coli after IPTG induction and was purified by CF-11 column.dsRNA was hydrolyzed with RNaseⅢand was purified by DEAE ion exchange chromatography and size exclusion chromatography.15% nondenaturing PAGE and 12% SDS- PAGE confirmed that RNaseⅢwas removed from oligonucleotides and 21 bp siRNA was purified with size exclusion chromatography.It was also found that APRIL siRNA obviously depressed APRIL expression in CHO cells.Conclusion:We have successfully constructed APRIL siRNA targeting APRIL gene of CFPAC-1 cells with in vitro transcription,which provides a basis for knock-down of APRIL gene in CFPAC-1 cells.

OBJECTIVETo investigate the clinical results of external fixation and AO titanium elastic intramedullary nailing for treatment of tibia-fibula comminuted closed fractures.

METHODSFrom June 2010 to June 2012,58 patients with tibia-fibula comminuted closed fractures were treated with external fixation and AO titanium elastic intramedullary nailing, including 31 males and 27 females with an average age of 38.5 years old ranging from 21 to 57 years old. According to the system of AO Classification, the fractures were classified as type B1 in 9 cases,type B2 in 7 cases, type B3 in 10 cases, type Cl in 14 cases, type C2 in 12 cases,and type C3 in 6 cases. According to the system of Winquist-Hanson,the fractures' comminuted were classified as grade 1 in 23 cases, grade 2 in 17 cases, grade 3 in 12 cases, and grade 4 in 6 cases. According to the system of Johner-Wruhs, clinical results were compared between different type and grade groups by the time of last followed-up.

RESULTSAll 58 patients were followed up with an average time of 6.8 months (ranged from 18 to 36 weeks). All fractures had clinical healing with an average time of 28 weeks (ranged from 24 to 32 weeks). The total rate of good to excellent results was 91.4%. The rate of good to excellent in the group of grade 1 was higher than that of other grades. The complication rates and fracture healing time would increase respectively with higher Winquist-Hanson's grade. The complication rates in the group of type C3 was higher than that of other types, but the rate of good to excellent was lower than that of other types. The complication rates in the group of type B1 was lower than that of other types,but the rate of good to excellent was higher than that of other types.

CONCLUSIONMinimal invasiveusing AO titanium elastic intramedullary nailing combined with external fixation for treatment of tibia-fibula fractures especially for the multiple-segment,long spiral mild-to-moderate comminuted with hidden fracture can get satisfactory reduction and reliable fixation,it conformes to the principle of BO completely, protects the fracture end blood supply,reduces the external fixation time, has less skin soft tissue complications, postoperative function recovered satisfactorily.

Adult ; Bone Nails ; Bone Plates ; External Fixators ; Female ; Fibula ; injuries ; surgery ; Follow-Up Studies ; Fracture Fixation, Intramedullary ; instrumentation ; methods ; Fractures, Closed ; surgery ; Fractures, Comminuted ; surgery ; Humans ; Male ; Middle Aged ; Minimally Invasive Surgical Procedures ; methods ; Tibia ; injuries ; surgery ; Young Adult

In order to increase the production of insecticidal crystal proteins Cry1 and Cry2, firstly, Plack-ett-Burman design was applied to evaluate the effectiveness of the related nutrition factors; it was found that the soybean powder and MnSO4?H2O were significant factors for Cry1 production, but the yield of Cry2 wasn’t effected remarkably in such medium. Then the steepest ascent experiment was adopted to approach the optimal region of the medium composition. Lastly, the optimal concentration of the soybean powder and MnSO4?H2O was 11.5 and 0.02 g/L, obtained by response surface methodology (RSM). The final yields of Cry1 and Cry2 was 0.32 mg/mL and 0.11 mg/mL, increasing twice more than that in the medium optimized before. The median lethal concentration (LC50) of optimal medium was 1.09 ?L/mL. The toxicity to Heli-coverpa armigera was significantly enhanced than the old one.

[Objective] To investigate the pathogen spectrum and characteristics of diarrheal disea-ses among children under five and to provide the basis for prevention and control measures . [ Methods] From February 2012 to January 2013, a total of 619 cases from 2 sentinel hospitals were collected for case survey .From them were collected stool specimens for detection of enteric pathogenic bacteria and virus nu-cleic acids. [Results] The virus detection rate was norovirus (11.95%), rotavirus(7.27%), enteric adenovirus(2.91%), saporovirus(1.45%) and astrovirus(0.97%).The bacteria detection rate was E. coli(5.65%), nontyphoidal salmonella (2.42%), campylobacter (0.81%), aeromonas hydrophila (0.65%),shigella(0.48%) and yersinia enterocolitica (0.32%).The virus detection rate was 27.70%from August to next March, which showed higher than that of other months (18.48%) (χ2 =7.18,P <0.05).The bacteria detection rate was 15.34%from April to October, showing higher than the rate of oth-er months(3.15%)(χ2 =31.22,P<0.05). [Conclusion] Norovirus is the main pathogen for viral diarrheal diseases in children under five and E .coli is the main pathogen of bacterial diarrheal diseases . All study results suggested that summer and autumn should be as the focus time in prevention and control of bacterial diarrhea , while those of viral diarrhea should cover the whole year .

Objective To explore the expression of osteopontin (OPN) in mucosal epithelium of oral local lesion in patients with oral lichen planus(OLP). Methods Forty patients with pathologically-confirmed OLP (erosive OLP,n=15; reticular OLP,n=25) were investigated,among whom 17 were complicated with mild dysplasia. Mucosal epithelium of oral local lesion was examined for the expression of OPN by immunohistochemical method. Forty healthy subjects were served as normal controls. Results The positive expression rates of OPN were 65.4% and 82.4%,respectively in patients with OLP and those complicated with mild dysplasia,and both were significantly higher than that in normal controls (10.0%) (P0.05),while both were significantly higher than that in normal controls (P