Objective To investigate the distribution and antibiotic resistance of Mycoplasma isolates from male genitourinary tract infection for rational use of antibiotics to treat Mycoplasma infections.Methods Isolates were detected using Mycoplasma IES Test Kit supplied by Yeoman Biotech (Zhuhai) Co.Ltd.Results A total of 698 strains (30.5%) of Mycoplasma was de- tected from 2 287 samples, 563 (80.7%) of which were Ureaplasma urealyticum, 26(3.7%)were Mycoplasma hominis. Both U.urea lyticum and M.hominis were identified in 109 (15.6%) specimens.U.urealyticum isolates were most suscepti- ble to josamycin, while all M.hominis isolates were susceptible to doxycyeline and minocycline, but resistant to erythromycin, roxithromycin and clarithromycin.Conclusions The best choice to treat Mycoplasma infections is josamycin, doxycycline and minocycline.The different strains of mycoplasrna may have variable susceptibility to the same kind of antibiotic.Active cul- ture, identification, and susceptibility testing of mycoplasma can provide useful data for rational use of antibiotics.

A lipopeptide compound was isolated from the culture of Bacillus subtilis HSO121 by methods of acidic precipitation, solvent extract, fractional precipitation, adsorption and prepared thin-layer chromatography; and its molecular structure was determined by by ninhydrin assay and IR methods following the Amino analysis, MS-MS and ESI-MS. It shows that the isolated lipopeptide consists of two homologues with molecular mass 1,022D and 1,036D and bearing a cyclic structure with the amino acid sequence Leu-Leu-Asp-Val-Leu-Leu-Glu in the peptide chain, which indicates that the isolated lipopeptide falls into the analogs of surfactin.

BACKGROUND:Autologous bone marrow aspirate concentrate is often applied in patients from Department of Orthopedics and those with severe limb ischemia, but rarely applied in Department of Oral and Maxil ofacial Surgery, especial y in Department of Oral Implantology. The effect of autologous bone marrow aspirate concentrate on promoting peri-implant bone regeneration deserves further studies.
OBJECTIVE:To evaluate the effect of bone marrow aspirate concentrate in the repair of peri-implant bone defect.
METHODS:Bone marrow 5 mL was extracted from posterior superior iliac spine of experimental dogs and bone marrow cel s were counted before and after concentration. Bone defect (4 mm × 4 mm × 4 mm) was prepared in the middle of bilateral mandibular premolar, which was randomly implanted with gelatin sponge plus bone marrow aspirate concentrate, autologous bone and gelatin sponge. At 4 and 12 weeks after surgery, bone defect specimens were histological y observed. The new bone formation rate and new bone mineral density were calculated.
RESULTS AND CONCLUSION:After centrifugation, the concentrations of nucleated cel s in bone marrow aspirate concentrate were increased by (2.78±0.22) times. More colony-forming units were found after cel culture. Histological analysis showed that, significantly higher new bone formation rate and new bone mineral density occurred in gelatin sponge plus bone marrow aspirate concentrate group, compared with autologous bone group and gelatin sponge group at 4 weeks (P<0.05). The new bone formation rate in gelatin sponge plus bone marrow aspirate concentrate group was significantly lower than that of autologous bone group, and higher than that of gelatin sponge group at 12 weeks (P<0.05). However, the difference of new bone mineral density in the three groups was not significant (P>0.05). Autologous bone marrow aspirate concentrate can significantly improve new bone mineral density and quantity in the pre-implant bone defect.

Objective To study the survival and melanogenic potential of human melanocytes reversibly immortalized via SV40T antigen gene and Cre/loxP system in Guinea pigs. Methods The supernatants of retrovirus vector Cre-ERT2 were used to infect melanocytes which had been successfully transfected by SV40TAg gene (MCT), then the expression of Cre recombinase was induced with tamoxifen in infected cells; subsequently, the surviving cells, which were named as MCTC, were subjected to expansion culture. Guinea pigs were utilized to establish animal models of vitiligo, then MCTC and primary melanocytes were transplanted respectively into the animal models. The repigmentation at the transplanted area was observed with naked eyes successively until 3 months after the transplantation when tissue samples were obtained from implanted area and nonimplanted area of guinea pigs and subjected to Masson-Fontana silver stain and Hematoxylin-eosin stain for the analysis of melanocyte distribution and melanin deposition in epidermis. Results Repigmentation started 4 weeks after the transplantation, and dark or brown patches, which ranged in size from 0.5 to 1 cm, were observed in the implanted area 3 months after the transplantation. The repigmentation rate was of no significant difference between pigs transplanted with MCTC and those with primary melanocytes (82.5% vs 76.7%, P > 0.05). Pathological examination revealed melanin deposition in the basal layer of epidermis and some hair follicles in transplanted area. Conclusions SV40T antigen gene combined with Cre/loxP site-specific recombinase system can induce the reversible immortalization of human melanocytes, and the immortalized melanocytes have a favorable profile of biological safety and similarity in survival rate and melanogenic potential to primary melanocytes.

Glycyrrhizin acid and licorice flavonoids are the component of Glycyrrhiza uralensis Fisch root that has been used for various medicinal purposes in traditional oriental medicine for thousands of years. Macrophages as a principal component of immune system play an important role in the initiation, modulation and final activation of immune response against pathogens. In the present study, glycyrrhizin acid and licorice flavonoids was investigated the anti-inflammatory effect on lipopolysaccharide (LPS)-induced macrophage cell line of RAW264.7. Well-grown RAW264.7 cells were collected and randomly divided into the blank control group, the LPS(1 mg x L(-1)) group, the dexamethasone (5 mg x L(-1)) with LPS group, the glycyrrhizin acid (400, 80, 16 mg x L(-1)) with LPS group and the licorice flavonoids (200, 40, 8 mg x L(-1)) with LPS group. RAW264.7 cells were cultured in 24-well plates, pre-incubated for 4 h with different concentrations of dexamethasone, glycyrrhizin acid, or licorice flavonoids. Then cells were stimulated for 20 h with LPS. The supernatant of culture medium was collected from each well and determinated the concentrations of cytokines by means of BioPlex mouse cytokines assay. Compared with the control group, the LPS group could significantly induced relatively high levels of granulocyte colony stimulating factor (G-CSF), granulocyte-macrophage colony stimulating factor( GM-CSF), macrophage inflammatory protein-1 alpha (MIP-1α), macrophage inflammatory protein-1 beta (MIP-1β), regulated upon activation normal T cell expressed and secreted factor (RANTES), tumor necrosis factor alpha ( TNF-α), monocyte chemotactic protein 1 (MCP-1), chemokine (C-X-C motif) ligand 1 (KC), eotaxin, interleukin(IL)-1α, IL-1β, IL-3, IL-4, IL-5, IL-6, IL-10, IL-12 (p40), IL-12 (p70), IL-13, and IL-17 secretion (P < 0.05). The glycyrrhizin acid significantly inhibited IL-1β, IL-3, IL-5, IL-6, IL-10, IL-12 (p40), IL-12 (p70), IL-13, Eotaxin and TNF-α secreted by LPS-stimulated RAW264.7 cells (P < 0.05). The expression levels of IL-6 and Eotaxin were observably decreased in the licorice flavonoids with LPS group (P < 0.05). The data presented here suggested that the glycyrrhizin acid and licorice flavonoids modulate various cytokines secreted by macrophages and were important anti-inflammatory constituent of Licorice.
Animals ; Cell Line ; Cytokines ; genetics ; immunology ; Flavonoids ; pharmacology ; Glycyrrhiza ; chemistry ; Glycyrrhizic Acid ; pharmacology ; Lipopolysaccharides ; immunology ; Macrophages ; drug effects ; immunology ; Mice

To study the anti-inflammatory activity of glycyrrhizin acid, ligustrazine and puerarin. In the study, the liquichip-based high-throughput synchronous detection technique for 23 inflammatory factors, uniform design, comprehensive weight method were adopted to study the effect of different combined administration of glycyrrhizin acid, ligustrazine and puerarin in inhibiting the expression of lipopolysaccharide (LPS)-induced RAW264. 7 cells and multiple inflammatory cytokines. In the study, the uniform design table U₉ (9³) was adopted to design doses of glycyrrhizin acid, ligustrazine and puerarin. The liquichip technique was used to detect the effect of different combined administration of glycyrrhizin acid, ligustrazine and puerarin on the 23 cytokines expressed in LPS-induced mouse macrophage RAW264. 7 inflammation model. The traditional Chinese medicine component optimization software and the improved least angle regression algorithm were used to analyze the dose-effect relationship among the three components and the cytokine inhibition rate and produce the regression equation. The comprehensive weight method was applied to get the optimal dose ratio of glycyrrhizic acid, ligustrazine and puerarin with highest efficacy of 25:2:13 and verify the optimal dose ratio. The verification results were consistent with the prediction trend, indicating the accuracy of the mathematical model for predicting the experiment. The experimental results showed the multi-target and multi-level efficacies of glycyrrhizic acid, ligustrazine and puerarin and the high anti-inflammatory activity of their combined administration, which provides powerful basis for subsequent drug development.
Animals ; Anti-Inflammatory Agents ; pharmacology ; Cytokines ; Glycyrrhizic Acid ; pharmacology ; Isoflavones ; pharmacology ; Lipopolysaccharides ; immunology ; Macrophages ; drug effects ; immunology ; Mice ; NF-kappa B ; genetics ; immunology ; Pyrazines ; pharmacology ; RAW 264.7 Cells

OBJECTIVE To investigate and analyze the application of antibiotics in non-surgical departments in our hospital.METHODS To make a survey of the use of antimicrobials in non-surgical departments from a total of 548 randomly selected medical records during Jan-Mar 2007,the data of reasonable use of antibacterials were obtained after evaluation and analysis.RESULTS Of the 548 patients in our study,229(41.79%)used antimicrobials.The use of antimicrobials for infection prevention was in 46 cases(20.09%),for infection treatment was in 183 cases(79.91%).From them 95 cases(41.48%)used a combination of two and more antimicrobials.The most widely used antibacterials were penicillins,cephalosporins,and quinolones.CONCLUSIONS The use of antimicrobials is generally reasonable,and meets the safe,effective,and economical goal in our hospital.

OBJECTIVE To investigate the use of antibiotics in our Outpatient Department during 2006-2007,and to analyze and evaluate the trend and rationality.METHODS The data about consumption quantity and consumption sum of antibiotics in our Outpatient Department during 2006-2007 were retrieved by means of computer management software in the department of pharmacy for the analysis of the clinical use of antibiotics using the method of defined daily dose(DDD).RESULTS Fluoro quinolones,cephalosporins and plant antibiotics have dominated the first places among the antibiotics used in our hospital,and the consumption of cephalosporins kept increasing year by year.CONCLUSIONS The use of antibiotics in our hospital should be further standardized to ensure the drug using safe,efficient and economic in our hospital.

OBJECTIVE To promote clinical rational use of antibiotic prophylaxis through surveying it in Obstetrics and Gynecology Department (OG) by pharmacists. METHODS Data of 223 cases using of antibiotic prophylaxis in OG were retrospectively analyzed. According to unreasonable use of antibiotic prophylaxis,the clinical pharmacists put out reasonable measures and directed treatment in succedent 206 patients. RESULTS The rate of unreasonable use of antibiotic prophylaxis in 223 cases was 100% and rate of infection after operation was 9.87%. After giving intervention,the rate of unreasonable use of antibiotic prophylaxis and infection were reduced to 3.88% and 1.46%,respectively (P

BACKGROUND:Different mechanical stimulations may have an effect on the level of metabolism of chondrocytes, but the effect is not clear.
OBJECTIVE:To investigate expression level changes in metabolic genes that participate in cartilage cel decomposition and synthesis under compressive stress and tensile stress conditions.
METHODS:We obtained articular chondrocytes from 2-week-old Sprague-Dawley rats. Primary cultured chondrocytes were identified. Passage one chondrocytes received cyclic tensile stress and cyclic compressive stress of 3%and 7%, respectively, so as to measure articular changes in chondrocytes-related genes.
RESULTS AND CONCLUSION:When chondrocytes were subjected to cyclic tensile stress of 3%, synthetic metabolic gene col agen types I and II and proteoglycan mRNA expression levels were decreased. If 3%cyclic compressive stress was applied, proteoglycan mRNA expression levels were increased, and type I col agen mRNA expression levels were decreased (P<0.001), and matrix metal oproteinase-13 mRNA expression levels were reduced (P<0.01). When strain reached 7%, cyclic tensile stress and compressive stress could lead to a general decrease in anabolism-related genes. The former could also make matrix metal oproteinase-13 mRNA expression levels increased (P<0.05). 3%cyclic compression ratio and 3%cyclic stretch made cytoskeleton become oval. These results indicated that in vitro, proper cyclic compressive stress is beneficial to maintain the growth characteristics of articular chondrocytes in rats. Smal tensile stress can decrease the synthesis ability of chondrocytes. The effect of stress may be caused by changing the cytoskeleton.