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Article in Chinese | WPRIM | ID: wpr-712671


Objective:To observe the effect of electroacupuncture (EA) at Jiaji (EX-B 2) points plus hydro-acupuncture with sinomenine hydrochloride for low back pain caused by compression fractures in the elderly.Methods:Ninety-five elderly in-patients with low back pain caused by compression fractures were randomly divided into an observation group and an EA group according to the visit sequence.Both groups received the same basic treatment.In the EA group,48 cases were treated with EA at Jiaji (EX-B 2) points plus the basic therapy;47 cases in the observation group received the basic treatment plus EA and hydro-acupuncture with sinomenine hydroch|oride at Jiaji (EX-B 2) points.The levels of osteoprotegerin (OPG) and interleukin-1β (IL-1β) in peripheral blood were measured by enzyme-linked immunosorbent assay (ELISA) before and at the 21st day of treatment in both groups.Oswestry disability index (ODI) and visual analog scale (VAS) scores were used to analyze the clinical efficacy.Results:After treatment,the OPG content in the observation group was higher with statistical significance compared with that before treatment in the observation group and after the treatment in the EA group,respectively (both P<0.05);the content of IL-1β,ODI and VAS scores were lower than those before treatment in the observation group and after treatment in the EA group with statistical significances (all P<0.05).Conclusion:The combination of EA and hydro-acupuncture with sinomenine hydrochloride at Jiaji (EX-B 2) points is effective for low back pain caused by compression fractures in the elderly,and is superior to EA at Jiaji (EX-B 2) points alone.

Chinese Journal of Epidemiology ; (12): 742-746, 2010.
Article in Chinese | WPRIM | ID: wpr-341045


Objective To examine the association between genetic polymorphism of rs1409181 in ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) and left ventricular hypertrophy (LVH) among older Chinese in Guangzhou. Methods 390 subjects aged ≥50 years were randomly selected from the Guangzhou Biobank Cohort Study-CVD. Information on personal history, blood pressure, fasting plasma glucose and lipids were collected. Color Doppler ultrasound was used to measure the indicators of LVH, including left ventricular internal diastolic diameter (LVIDD) , thickness of the interventricular septum diastolic wall (IVSD) and the posterior wall diastolic diameter (LVPWD). LVIDD was calculated using Devereux ventricular mass (LVM)equation while the Left ventricular mass index (LVMI) equation was used to estimate LVH. The genotype of rs1409181 was determined by Taqman SNP genotyping kits using the ABI 7900HT real time PCR system. Results In the GG, CG and CC genotype groups, the proportions of LVH were 21.5%, 28.2% and 37.5% respectively. Compared with GG, the adjusted odds ratios (95% confidence interval) for the LVH were 1.39(0.78-2.50) and 2.36(1.21-4.60) for CG genotype and CC genotype of ENPP1 respectively (P for trend=0.01). Conclusion Polymorphism of ENPP1 gene rs1409181 was associated with LVH in the older Chinese people in Guangzhou.

Article in English | WPRIM | ID: wpr-269705


<p><b>AIM</b>Dental biofilms are complex communities composed largely of harmless bacteria. Certain pathogenic species including Streptococcus mutans (S. mutans) can become predominant when host factors such as dietary sucrose intake imbalance the biofilm ecology. Current approaches to control S. mutans infection are not pathogen-specific and eliminate the entire oral community along with any protective benefits provided. Here, we tested the hypothesis that removal of S. mutans from the oral community through targeted antimicrobial therapy achieves protection against subsequent S. mutans colonization.</p><p><b>METHODOLOGY</b>Controlled amounts of S. mutans were mixed with S. mutans-free saliva, grown into biofilms and visualized by antibody staining and cfu quantization. Two specifically-targeted antimicrobial peptides (STAMPs) against S. mutans were tested for their ability to reduce S. mutans biofilm incorporation upon treatment of the inocula. The resulting biofilms were also evaluated for their ability to resist subsequent exogenous S. mutans colonization.</p><p><b>RESULTS</b>S. mutans colonization was considerably reduced ( +/- 0.4 fold reduction, P=0.01) when the surface was preoccupied with saliva-derived biofilms. Furthermore, treatment with S. mutans-specific STAMPs yielded S. mutans-deficient biofilms with significant protection against further S. mutans colonization (5 minutes treatment: 38 +/- 13 fold reduction P=0.01; 16 hours treatment: 96 +/- 28 fold reduction P=0.07).</p><p><b>CONCLUSION</b>S. mutans infection is reduced by the presence of existing biofilms. Thus maintaining a healthy or "normal" biofilm through targeted antimicrobial therapy (such as the STAMPs) could represent an effective strategy for the treatment and prevention of S. mutans colonization in the oral cavity and caries progression.</p>

Anti-Infective Agents , Pharmacology , Antimicrobial Cationic Peptides , Pharmacology , Biofilms , Dental Caries , Humans , Microscopy, Confocal , Streptococcal Infections , Streptococcus mutans
Article in Chinese | WPRIM | ID: wpr-686294


The intraspecies quorum sensing system of Streptococcus mutans is involved with com genes family.ComE is a kind of response regulator and act as a promoter to the quorum sensing genes.S.mutans comE mutant strain IFD140?comE was constructed using the inframe-deletion system via twice homologous recombination.In current genetic studies of S.mutans,insertion duplication and allelic exchange mutagenesis techniques routinely create polar effects to downstream genes.In-frame deletions are essentially free of these polar effects because the mutation does not introduce any genetic markers.By PCR,sequencing and RT-PCR,it was confirmed that IFD140?comE has only 717bp deleted within the comE gene and the transcription of the downstream gene comD was not interfered.The research of the morphological characteristics indicated that IFD140?comE formed clumps and cells accumulated at the bottom of the glass tubes and light-microscopic observations displayed that the mutant strain formed significantly longer chains compared to those formed by the wild strain.The successfully construction of IFD140?comE lay a foundation for further quorum sensing research.

Article in Chinese | WPRIM | ID: wpr-249775


<p><b>OBJECTIVE</b>To search the DNA sequences specific to virulent strain of Streptococcus mutans in the public database and explore new genes or new functions of already known genes from Streptococcus mutans of serotype c and suppose their functions.</p><p><b>METHODS</b>Thirty-one DNA fragments unique to virulent strain of Streptococcus mutans were sequenced. The sequences of these presumptive virulence DNA fragments were subjected to search through software BLASTn and BLASTx in public database, and their putative biological functions were analyzed. RESULTS Two clones were picked repeatedly. The size of the remaining DNA fragments ranged from 113 bp to 776 bp. The average G+C content was 38.59%, similar to that of the gene-coding sequences in Streptococcus mutans strain UA159 whose genome sequences were just complete. Of the twenty-nine DNA fragments, five potentially represented new DNA fragments in Streptococcus mutans, thus registered and obtained their gene's accession number in GenBank. The remaining DNA fragments showed high homology to known genes of Streptococcus mutans strain UA159. Their predicted functions of these fragments were associated to bacterial signal transduction, transcriptional regulation, stress-damage repair, biochemical metabolism, outer membrane protein synthesis, adhesion on tooth surface and hypothetical proteins.</p><p><b>CONCLUSION</b>The gene analysis, identification and functional forecasting were carried out through bioinformatics associated software and database to find out new genes and new functions of known genes, and to supply the groundwork for researches in gene functions.</p>

Base Sequence , DNA , Streptococcus mutans
Article in Chinese | WPRIM | ID: wpr-289024


<p><b>OBJECTIVE</b>To construct a suppression subtractive library of virulence-related genes from c serotype Streptococcus mutans (S. mutans), and lay foundations for screening the virulent genes.</p><p><b>METHODS</b>After being isolated from virulent and avirulent strain of S. mutans respectively, the intact and high-pure genomic DNA was digested with three appropriate four-base-cutting restriction endonueleases to produce fragments of optimal length. The digested DNA of the virulent strain ligated with adaptor was used as tester DNA, and that of the avirulent strain as driver DNA. Then the suppression subtractive hybridization was carried out, and the efficiency of ligation and subtraction detected respectively. The subtracted fragments were inserted into vector pCR2. 1 using T/A cloning kit, and transformed into E. coli TOP10F' competent cells. Those white colonies were selected to construct the suppression subtractive library.</p><p><b>RESULTS</b>Alu I chosen from three restriction endonucleases was verified to be suitable for preparing restriction fragments from S. mutans genomic DNA. Through electrophoresis of Alu I -digested DNA, a smear ranged from 0.1 to 2.0 kb was observed. The ligation efficiency of tester DNA with adaptor was at least higher than 25 percent. The subtraction efficiency of suppression subtractive hybridization confirmed the success in enrichment of differential genes between virulent and avirulent strain of S. mutans. In the subtracted group, the appearance time of the 23S rRNA gene both in tester and driver DNA was later than that in the unsubtracted group by six cycles. It suggested that suppression subtractive hybridization happened indeed. After the subtracted fragments were cloned, 96 colonies were picked up for constructing the suppression subtractive library of virulence-related genes of S. mutans.</p><p><b>CONCLUSION</b>Suppression subtractive hybridization allows rapid and easy construction of virulence-related gene library of S. mutans.</p>

Escherichia coli , Gene Library , Nucleic Acid Hybridization , Streptococcus mutans , Subtractive Hybridization Techniques , Virulence