[Objective]To discuss the alterations of sesamoid position before and after opertation and its relation to the function of the metatarsophalangeal joints.[Methods]Eighty feet(39 hallux valgus feet,41 normal foot) were selected.The distance from sesamoids to the second metatarsal,the relative position of sesamoid bone to the first metatarsal bone,the function of the first metatarsophalangeal joints were determined and analyzed.[Results]The distance from sesamoid to the second metatarsal had no statistical significance in normal feet compared with the hallux valgus feet(P

The beta and gamma chain gene rearrangements of the T-cell receptors(TCR)were studied with Southern blot hybridization and polymerase chain reaction in 13 cases of non-Hodgkin's lymphoma with T-cell phenotype.It was found that 11 out of the 13 cases(86%)exhibited TCR beta gene rearragnement and 12 out of the 13(91%)displayed TCR gamma gene rearrangement.The findings suggest that gene rearrangements are more sensitive and specific markers to establish T-cell monoclonality and lineage and helpful to the morphological diagnosis and immunophenotyping for non-Hodgkin's lymphoma.

This article is to discuss the ethical principles in the diagnosis and treatment of periodontal diseases:①moral responsibility must be strong enough when examinating,diagnosing and curing;②skills should be mastered and improved;③characteristic of senile patients should be attached to.④right oral health education is obligatory.

Objective:To investigate the expression of antigens in Plasmodium yoelii sexual stage and transmission blocking effects of monoclonal antibodies(McAbs).Methods:Observing the effects of anti Pys25 McAb4 and anti Pys21 McAb10 on developmental course of parasites in mosquitoes by direct mosquito feeds on passively immunized P.yoelii infected mice and the expression of Pys21 and Pys25 from gametocytes to ookinetes in indicated culture times by IFA and Western blotting.Results:The transmission blocking activity of the anti Pys25 McAb4 was complete and more potent than that of the anti Pys21 McAb10.Both Pys25 and Pys21 were presented in whole developmental course from gametocytes to ookinetes.Furthermore,the expression of Pys25 appeared to be earlier than that of Pys21 on zygote surfact.Conclusion:Pys25 and Pys21 are target antigens of transmission blocking immunity and that anti Pys25 McAb4 has more significantly transmission blocking activity is related with the early stage expression of Pys25 on zygote surface.

Objective To investigate the resistance-related genes of Shigella sonnei with decreased susceptibility to fluoroquinolones.MethodsA total of 131 strains of Shigella sonnei were analyzed for their antimicrobial susceptibility.Mutations within the quinolone resistance determining regions (QRDR) of gyrA and parC were detected by polymerase chain reaction (PCR) and PCR products were then sequenced. Meanwhile, the plasmid-mediated quinolone resistance (PMQR) genes,qnr and aac(6')-Ib-cr were screened by PCR.ResultsResistance rates of 131 Shigella sonnei isolates to nalidixic acid,tetracycline,ampicillin and trimethoprim-sulfamethoxazole were 100.0％,93.9％,93.2％ and 92.8％,respectively.All strains were susceptible to norfloxacin,ciprofloxacin,levofloxacin,while 94％ nalidixic acid-resistant Shigella sonnei strains showed reduced susceptibilities to fluoroquinolones.All of nalidixic acid-resistant Shigella sonnei strains presented a single mutation at codon 83 (Ser→Leu) of gyrA genes,but no mutations were detected in parC gene.And PMQR genes qnr and aac (6’)-Ib-cr were not detected.Conclusions The nalidixic acid-resistant Shigella sonnei strains with reduced susceptibility to fluoroquinolones are common in the clinical practice,which may mainly due to a single mutation at codon 83 (Ser→Leu) of gyrA genes.

Objective To investigate ?-Lactamase coding genes and OprD2 gene in multidrug-resistant Pseudomonas aeruginosa isolated from Xiangfan region in Hubei province.Method Polymerase chain reaction(PCR) was used to detect various ?-Lactamase coding genes including TEM、SHV、OXA、PER、GES、IMP、VIM、plasmid type AmpC ?-Lactamase DHA 、MIR and OprD2 in 35 strains of Pseudomonas aeruginosa.Results The detection rate of ?-Lactamase coding genes TEM、OXA、plasmid type AmpC ?-Lactamase DHA were 51.4%、17.1% and 2.9% respectively, all of the tested strains of Pseudomonas aeruginosa lossed OprD2 gene,but SHV、PER、GES、IMP、VIM、MIR genes were negative.Conclusion The study indicated that these Pseudomonas aeruginosa carried genes of TEM、OXA、plasmid type AmpC ?-Lactamase DHA and lossed OprD2 gene, which was the essential resistance mechanism of Pseudomonas aeruginosa to Beta-lactam antibiotics in local aera.

Objective To establish a new method for monitoring aspirin response by platelet activated-release experiment.Methods The platelets in whole blood were activated by ARA,and the MPC was measured by hematology analyzer.Blood samples were drawn from five healthy volunteers for measuring MPC,LTAARA and platelet membrane CD62P expression.Blood samples were mixed thoroughly right after venipuncture. The concentration of ARA (0,0. 5,1.0,1.5,5.0 and 10. 0 mmol/L) and the time for platelet activation (5,10,20,30,40,50,60,70,80 and 90 min in 37℃ water bathe) were optimized to evaluate the stability (0,1,2 and 3 h after venipuncture) and reproducibility (MPC, LTAARA and platelet membrane CD62p were measured ten times and the CV was calculated). Platelets were mixed with acetylsalicylic acid at different concentrations in vitro in order to verify the validity for monitoring aspirin response. The percentage of CD62p positive platelets after activated by ARA was measured using flow cytometer with CD61-PerCP and CD62p-PE antibodies. The correlation between MPC and CD62P was determined. 100 patients without taking or stop taking aspirin more than 7 days and 93 patients who took aspirin at least 7 days were enrolled. Duplicate measurements of platelet function were performed using the change of MPC (ARA 0. 5 mmol/L) and LTA (ARA 0. 5 mmol/L) among two patient groups to evaluate the accuracy of the new method. Results Platelcts were completely activated by ARA at final concentration of 0. 5 mmol/L. MPC negatively correlated with platelet membrane CD62p(r=-0. 755,P<0. O1 ). MPC was stable for 30 minutes in 37 ℃ water bathe after ARA activation. The result of MPC was consistent at room temperature within 3 hours after blood collection. This method had good reproducibility. CV in batch using fresh whole blood was 1.35% and CV between batches using commercial control whole blood were 0. 71% and 0. 74%. With the concentration of acetylsalicylic acid increased (0-6. 95 μmol/L), MPC increased as CD62P decreased, which showed negative correlation (r=-0. 765 ,P <0. 01 ). The difference of MPC before and after ARA activation (ΔMPC) and MPC variance ratio of the group taking aspirin were ( 8. 2±8. 6) g/L and ( 3.4±3.6) %, and they were (37.4±10. 3 ) g/L and ( 15.7±4.0) % in control group, respectively.ΔMPC and MPC variance ratio showed significant difference between the two groups ( t=21. 522, 22. 409, all P < 0. 01 ). Area under the ROC curve for MPC variance ratio was 0. 992 with sensitivity of 96. 8% and specificity of 99.0% for monitoring the aspirin response using the cut-off of 8. 7%. MPC variance ratio had good correlation with LTAARA (r = 0. 720, P < 0. O1 ). Conclusions A new method for monitoring aspirin response by platelet activated-release experiment is established. It may replace LTAARA for routine clinical examination.

Objective To assess the influence of pre-exposure to non-ablating ultrasound on the effect of high intensity focused ultrasound(HIFU)ablation.Methods Forty rabbits with transplanted VX2 tumors on their livers were divided into three pre-exposure groups(60 W,80 W and 100 W)and a control group(O W),with 10 rabbits in each group.Each group was pre-exposed to lower intensity focused ultrasound at the corresponding power.From each group,5 rabbits were randomly selected to be exposed to HIFU on the next day.Each group received 14scans.The rabbits were sacrificed 24 h later to take tissue samples for tfipheny tetrazolium chloride(TTC)staining to measure the amount of coagulative necrosis.Hematoxylin and eosin(HE)staining and succinate dehydrogenase (SDH)were also measured to observe the structure and activation of pre-exposed tumors.Results After HIFU exposure,the ablated volumes increased with pre-exposure acoustic intensity,and all volumes were larger than those in the control group.The ablating efficiency in the 100 W group was the highest.The pre-exposure did not itself ablate tumor tissue,but in the 80 W and 100 W groups the structure and activation of the tissues changed.Those in the 60 W group were not obviously altered.Conclusion Prior exposure to non-ablating ultrasound can highly enhance the efficacy of HIFU ablation.

Objective To identify an suspected Vibrio cholerae isolated from Xiangyang Central Hospital and characterize the strain in terms of antibiotic resistance and relevant virulence genes.Methods Pathogen identification and susceptibility testing were completed with MicroScan WalkAway 40 Automated Microbiology System.Slide agglutination was used for serotyping. PCR and sequencing technology were employed for 16s RNA gene analysis.PCR technique was used to detect six major viru-lence genes.Results This suspectedVibrio cholerae isolate was confirmed as non-O1 and non-O139 Vibrio cholerae .Suscep-tibility testing results indicated that the strain was sensitive to ampicillin,chloramphenicol,trimethoprim-sulfamethoxazole, and tetracycline.16s RNA gene sequence analysis showed 100% homologous with the registered sequence in National Center for Biotechnology Information database.Virulence genes rtxC and toxR were identified.The other virulence genes such as tcpAET,ctxA,hlyA,and tcpACL were negative.Conclusions This suspected Vibrio cholerae isolate is confirmed as non-O1 and non-O139 Vibrio cholerae .The pathogenic factors may be related to the virulence genes rtxC and toxR.

BACKGROUND:Matrix extracel ular phosphoglycoprotein phosphorylated extracel ular matrix glycoprotein (MEPE) gene plays an important role in bone mineralization and absorption as wel as the balance of osteoblasts and osteoclasts. Studies on the function and regulatory mechanism of MEPE can provide new ideas for the treatment of osteoporosis. OBJECTIVE:To analyze the regulatory effects of transcription factor Runx2 on MEPE promoter in mouse preosteoblasts, thereby preliminarily studying the Runx2 effects in the process of bone formation and development. METHODS:First of al , the Runx2 eukaryotic expression vector was built according to the gene sequence of Runx2 in Genebank;then the dual luciferase reporter assay was employed to analyze the effects of Runx2 on transcription activity of MEPE promoters with different lengths in order to determine the promoter region in which Runx2 has significant effect. Afterwards, the effects of Runx2 on transcipition activity of MEPE gene promoter which induced by three MAPK signaling pathway inhibitors were investigated. Final y, real-time PCR was used to analyze the expression activity of MEPE gene promoter regulated by Runx2. RESULTS AND CONCLUSION:We successful y constructed the Runx2 eukaryotic expression vector. Dual luciferase reporter assay showed that Runx2 could increase the transcription activity of MEPE gene promoter in preosteoblasts, and the fragment area in which Runx2 exhibited the more significant up-regulatory effectiveness was (-300 to+66)366 bp. Runx2 could increase the transcription activity of MEPE gene promoter by activating the MAPK single pathway. The real-time PCR verified that Runx2 increased the expression activity of MEPE gene promoter. These findings indicate that Runx2 can regulate the express of MEPE gene promoter by the MAPK single pathway, in order to build the basis for exploring the process of bone formation and development.