1.Distribution and antibiotic resistance of 698 Mycoplasma isolates from male genitourinary tract infections
Zhong-Lan JIA ; Ying YANG ; Fan YANG ;
Chinese Journal of Infection and Chemotherapy 2007;0(01):-
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.
2.Isolation and Identification of a Lipopeptide
Ying-Nian LV ; Shi-Zhong YANG ; Bo-Zhong MU ;
Microbiology 1992;0(01):-
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.
3.Moderate cyclic compressive stress accelerates anabolism of articular chondrocytes by affecting cytoskeleton
Jun MO ; Ying CHEN ; Dongyan ZHONG ; Huilin YANG ; Zongping LUO
Chinese Journal of Tissue Engineering Research 2016;20(37):5511-5517
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.
4.Autologous bone marrow aspirate concentrate repairs peri-implant bone defect
Ying YANG ; Weijian ZHONG ; Guo LIU ; Guowu MA
Chinese Journal of Tissue Engineering Research 2014;(11):1653-1658
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.
5.The relationship between eosinophil and in-stent restenosis in ACS patients
Ying SHI ; Zezhong ZHONG ; Zicong YANG ; Yan XUE ; Ling LIU
The Journal of Practical Medicine 2015;31(22):3701-3704
Objective To investigate the relationship between eosinophil and in-stent restenosis in acute coronary syndrome patients. Methods One hundred and fifity-one ACS cases werenenrolled in this study. According to the results of coronary angiography (the stented segment lumen loss over 50% was judged to be ISR), patients were divided into the restenosis group and the non-restenosis group. Results Based on the logistic analysis, no significant association was found between eosinophil and ISR, and even after adjustment of related risk factors (P > 0.05). The stratification analysis showed that the high level of eosinophil might increase the risk of ISR in ACS patients with history of hypertension (P = 0.038) and myocardial infarction (P = 0.032). Conclusion Eosinophil may be associated with the risk of ISR in ACS patients with history of hypertension and myocardial infarction. The underlying mechanisms need to be elucidated in further study.
6.Differences between right-sided and left-sided intestinal cancers
Jiao YANG ; Jianfei FU ; Xian ZHONG ; Ying YUAN
Journal of International Oncology 2015;(4):305-308
Decreasing trend has occurred in incidence of colorectal cancer in developed countries. A shift from left to right in location of colorectal cancer has been recognized,which may be associated with colonoscopy screening,aging population,diet structure modification,increased incidence of cancer and diabe-tes. Factors including sex,race and education may also play a role to some extent. Right-sided intestinal cancers have higher proportion of poor differentiation,terminal stage and mucinous component. Complications and second primary intestinal cancer are more common in right-sided intestinal cancers. Left-sided intestinal cancers tend to be well differentiated and at relatively early stage at diagnosis. With respect to molecular mecha-nism,right-sided cancers are associated with mismatch repair system,while left-sided cancers are related to p53 mutation. Based on the differences in clinicopathology and genetics,it′s implied that left-sided and right-sided intestinal cancers may belong to two different kind of disease. It′s suggested that attentions should be paid differently according to their respective characteristics in clinical practice and trials.
7.Effects of combination of glycyrrhizin acid, ligustrazine and puerarin on LPS-induced cytokines expression in macrophage.
Zhao LIU ; Ju-ying ZHONG ; Er-ning GAO ; Hong YANG
China Journal of Chinese Materia Medica 2015;40(20):4068-4074
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
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Anti-Inflammatory Agents
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pharmacology
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Cytokines
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Glycyrrhizic Acid
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pharmacology
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Isoflavones
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pharmacology
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Lipopolysaccharides
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immunology
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Macrophages
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drug effects
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immunology
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Mice
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NF-kappa B
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genetics
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immunology
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Pyrazines
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pharmacology
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RAW 264.7 Cells
8.Effects of glycyrrhizin acid and licorice flavonoids on LPS-induced cytokines expression in macrophage.
Zhao LIU ; Ju-Ying ZHONG ; Er-Ning GAO ; Hong YANG
China Journal of Chinese Materia Medica 2014;39(19):3841-3845
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
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Cell Line
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Cytokines
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genetics
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immunology
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Flavonoids
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pharmacology
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Glycyrrhiza
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chemistry
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Glycyrrhizic Acid
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pharmacology
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Lipopolysaccharides
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immunology
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Macrophages
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drug effects
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immunology
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Mice
9.Antibiotics Usage in Outpatients
Yang LIU ; Hua ZHONG ; Juanli L ; Yongmei ZHANG ; Ying LIU
Chinese Journal of Nosocomiology 2006;0(12):-
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.
10.Rational Usage of Antibiotics Prophylaxis in Department of Obstetrics and Gynecology During Perioperative Period
Yang LIU ; Hua ZHONG ; Juanli L ; Yongmei ZHANG ; Ying LIU
Chinese Journal of Nosocomiology 2009;0(13):-
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