Journal of the korean academy of Pediatric Dentistry
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v.37
no.3
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pp.308-316
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2010
Odontoblasts are anchorage dependent cells adhering to a substrate via cell adhesive molecules. Receptor ligands such as integrins bind to these proteins and are known to function as signal transduction molecules in a series of critical recognition events of cell-substratum. The aim of this study is to examine the interaction of odontoblast (MDPC-23 cell) with type I Col and the effect of TGF-${\beta}1$ and TNF-$\alpha$ on the expression of cell adhesion molecules. In this study, MDPC-23 cells adhered to type I Col dose-dependently. Immunofluorescence data demonstrated that integrin ${\alpha}1$, ${\alpha}2$ and CD44 were expressed on cell surface, and FAK and paxillin were localized in focal adhesion plaques in MDPC-23 cells adhesion to Col. Cytokine TGF-${\beta}1$ increased the adhesion of MDPC-23 cells to Col and the expression level of integrin ${\alpha}1$, 4{\alpha}2$ and chondroitin sulfate on MDPC-23 cells. RT-PCR data demonstrated that cytokine TGF-${\beta}1$ increased the amount of integrin ${\alpha}1$ mRNA in MDPC-23 cells. Therefore, MDPC-23 cells adhere to collagen type I Col and expressed a complex pattern of integrins and proteoglycans, including ${\alpha}1$, ${\alpha}2$, chondroitin sulfate and CD44 detected by immunoblotting and immunofluorescence assay. TGF-${\beta}1$ treatment enhanced the expression of adhesion molecules such as integrin ${\alpha}1$, ${\alpha}2$ and chondroitin sulfate.
Objective : Salvia miltiorrhiza Bunge (Labiatae) (SM), an eminent herbal plant, has been widely used in traditional Chinese medicine for the treatment of vascular diseases such as hypertension. The aim of this study was to determine whether SM inhibits production of nitrite, an index of NO, and proinflammatory cytokines in lipopolysaccharide (LPS)-treated RAW 264.7 macrophages. And this study investigated whether or not SM could reduce tumor necrosis factor-${\alpha}$ (TNF-${\alpha}$)-induced inflammatory response in human vascular aortic smooth muscle cells (HASMC) and umbilical vein endothelial cells (HUVEC). Methods : Cytotoxic activity of SM on RAW 264.7 cells was using 5-(3-caroboxymeth-oxy phenyJ)-2H-tetra-zolium inner salt (MTS) assay. We measured the NO production using Griess Reagent System. Production of Proliflammatory cytokines was measured by Enzyme-Linked Immunosorbent Assay (ELISA). Results : Our results indicated that SM significantly inhibited the LPS-induced NO production accompanied by an attenuation of tumor necrosis factor-${\alpha}$ (TNF-${\alpha}$), IL-6 and monocyte chemoattractant protein (MCP)-1 formation in macrophages. SM decreased TNF-${\alpha}$-induced IL-8, IL-6 production, and intracellular adhesion molecule (ICAM)-1 and vascular cell adhesion molecule (VCAM)-1 expression. Conclusion : These results indicate that SM has potential as an anti-inflammatory agent.
Biofilm-related infections of Candida albicans are a frequent cause of morbidity and mortality in hospitalized patients, especially those with immunocompromised status. Options of the antifungal drugs available for successful treatment of drug-resistant biofilms are very few, and as such, new strategies need to be explored against them. The aim of this study was to evaluate the efficacy of phenylpropanoids of plant origin against planktonic cells, important virulence factors, and biofilm forms of C. albicans. Standard susceptibility testing protocol was used to evaluate the activities of 13 phenylpropanoids against planktonic growth. Their effects on adhesion and yeast-to-hyphae morphogenesis were studied in microplate-based methodologies. An in vitro biofilm model analyzed the phenylpropanoid-mediated prevention of biofilm development and mature biofilms using XTT-metabolic assay, crystal violet assay, and light microscopy. Six molecules exhibited fungistatic activity at ${\leq}0.5mg/ml$, of which four were fungicidal at low concentrations. Seven phenylpropanoids inhibited yeast-to-hyphae transition at low concentrations (0.031-0.5 mg/ml), whereas adhesion to the solid substrate was prevented in the range of 0.5-2 mg/ml. Treatment with ${\leq}0.5mg/ml$ concentrations of at least six small molecules resulted in significant (p < 0.05) inhibition of biofilm formation by C. albicans. Mature biofilms that are highly resistant to antifungal drugs were susceptible to low concentrations of 4 of the 13 molecules. This study revealed phenylpropanoids of plant origin as promising candidates to devise preventive strategies against drug-resistant biofilms of C. albicans.
Kim, Yong-Tae;Jeon, Young-Soo;Kim, Jung-Hyo;Kim, Sung-Hoon
THE JOURNAL OF KOREAN ORIENTAL ONCOLOGY
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v.5
no.1
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pp.19-32
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1999
To evaluate the antitumor activity and antimetastatic effects of Kamigumgusingihwan(KGSH) studies have ken done. The results were obtained as follows: 1. KGSH extracts exhibited a weak cytotoxicity against A549, SK-OV-3, B16-F10, and SK-MEL-2 cell lines. But exhibited potent cytotoxicity against P388 cell line in a dose-dependent manner. 2. The concentration inhibiting adhesion of A549, to complex extracellular matrix up to below 30% of control was recognized at $10^{-3}g/ml$ of KGSH 3. KGSH extracts showed a weak inhibitoty effect on DNA topo-isomerase I from calf thymus. 4. The T/C% was 137% in KGSH treated group in S-180 bearing ICR mice. 5. In pulmonary colonization assay, a number of colonies in the lungs were decreased significantly in KGSH treated group as compared with control group. 6. In hematological changes in B16-BL6 injected C57BL/6, numbers of WBC were decreased insignificantly in KGSH treated groups, and also those of platelet were increased insignificantly in KGSH treated groups as compared with control. 7. In CAM assay, KGSH extracts inhibited angiogenesis at $15{\mu}g/egg $concentration significantly as compared with control. Taken together these results, it is strongly demonstrated that KGSH significantly suppressed tumor metastasis by blocking cell adhesion to extracellular matrix. Therefore, KGSH is expected to be clinically a potent antimetastatic drug for the prevention and treatment of cancer.
Objectives: The present study was designated to evaluate the direct effects of Fructus Liquidambaris on suppression of eosinophil activity and on suppression of chemokines such as eotaxin, IL-8, ICAM-1, and VCAM-1, in vitro. Methods: A549 cells were stimulated with TNF-$\alpha$ (100 ng/ml), IL-4 (100 ng/ml) or IL-$1{\beta}$(10 ng/ml) to induce chemokines and adhesion molecules involved in eosinophil chemotaxis. Then after treatment of Fructus Liquidambaris, inhibition effect assay such as ELISA, real-time RT-PCR, and chemotaxis assay was performed. Results: Eotaxin level was suppressed in both protein secretion and mRNA expression. Eosinophil recruitment to lung epithelial cells was also reduced by Fructus Liquidambaris, implying the role of eotaxin in eosinophil recruitment. In addition, expression of IL-8 was also suppressed by Fructus Liquidambaris (p<0.05). However, expression of adhesion molecules (ICAM-1, VCAM-1) related to eosinophil was not affected. The eosinophil migration was inhibited at high concentration of Fructus Liquidambaris (p<0.05). Conclusion: These results suggest that Fructus Liquidambaris may regulate a common signaling pathway of eotaxin and IL-8. FS might be of therapeutic value in diseases such as asthma.
Echinodermata use saponins in chemical defense against pathogens and predators. The molecular mechanisms of antimetastatic effects of brittle star saponins are still unknown. The present study examined antioxidant capacity and invasive ability in HeLa carcinoma cells exposed to brittle star crude saponins. Discolorating methods with DPPH and ABTS and expression of SOD-2 with RT-PCR were used to estimate the antioxidant activity. The anti-invasive activity of extracted saponins was examined through adhesion of HeLa cells to extracellular matrix, wound healing and evaluation of the mRNA levels of MMP-2 and MMP-9 by real time-PCR. The results showed that extracted saponins had cytotoxicity against cervical cancer cells and ABTS and DPPH scavenging properties with $IC_{50}$ values of 604.5, $1012{\mu}g/ml$, respectively. Further, we found that, in wound healing assay, brittle star saponins could prevent invasion of HeLa cells in a concentration dependent manner. Furthermore, cell adhesion assay demonstrated blockage of cell attachment to extracellular matrix with an $IC_{50}$ concentration of $16.1{\mu}g/ml$. The significant dose dependent down regulation of MMP-2 and MMP-9 in treated cells demonstrated that isolated saponins can decline tumor metastasis in vitro. The brittle star saponins remarkably prevented cervical cancer invasion and migration associated with down regulation of matrix metalloproteinase expression. Therefore, saponins could be suggested as an anti-invasive candidate against cervical cancer and an antioxidant as well.
STATEMENT OF PROBLEM: Zirconium oxide can be a substitute to titanium as implant materials to solve the esthetic problems of dark color in the gingival portion of implant restorations. PURPOSE: This study was performed to define attachment and growth behavior of osteoblast- like cells cultured on grooved surfaces of zirconium oxide and evaluate the genetic effect of zirconium oxide surfaces using the reverse transcriptase-polymerase chain reaction (RT-PCR). MATERIAL AND METHODS: MC3T3-E1 cells were cultured on (1) commercially pure titanium discs with smooth surface (T group), (2) yttrium-stabilized tetragonal zirconia polycrystal (Y-TZP) with machined surface (ZS group), and (3) Y-TZP with $100{\mu}m$ grooves (ZG group). Cell proliferation activity was evaluated through MTT assay and cell morphology was examined by SEM. The mRNA expression of Runx2, alkaline phosphatase, osteocalcin, TGF-${\beta}1$, IGF-1, G3PDH in E1 cells were evaluated by RT-PCR. RESULTS: From the MTT assay, after 48 hours of adhesion of MC3T3-E1 cells, the mean optical density value of T group and ZG group significantly increased compared to the ZS group. SEM images of osteoblast-like cells showed that significantly more cells were observed to attach to the grooves and appeared to follow the direction of the grooves. After 24 hours of cell adhesion, more spreading and flattening of cells with active filopodia formation occurred. Results of RT-PCR suggest that T group, ZS group, and ZG group showed comparable osteoblast-specific gene expression after 24 hours of cell incubation. CONCLUSION: Surface topography and material of implants can play an important role in expression of osteoblast phenotype markers. Zirconia ceramic showed comparable biological responses of osteoblast-like cells with titanium during a short-time cell culture period. Also, grooves influence cell spreading and guide the cells to be aligned within surface grooves.
PURPOSE. The aim of this study was to investigate the destructive effects of biofilm formation and/or biocorrosive activity of 6 different oral microorganisms. MATERIALS AND METHODS. Three different heat polymerized acrylic resins (Ivocap Plus, Lucitone 550, QC 20) were used to prepare three different types of samples. Type "A" samples with "V" type notch was used to measure the fracture strength, "B" type to evaluate the surfaces with scanning electron microscopy and "C" type for quantitative biofilm assay. Development and calculation of biofilm covered surfaces on denture base materials were accomplished by SEM and quantitative biofilm assay. According to normality assumptions ANOVA or Kruskal-Wallis was selected for statistical analysis (${\alpha}$=0.05). RESULTS. Significant differences were obtained among the adhesion potential of 6 different microorganisms and there were significant differences among their adhesion onto 3 different denture base materials. Compared to the control groups after contamination with the microorganisms, the three point bending test values of denture base materials decreased significantly (P<.05); microorganisms diffused at least 52% of the denture base surface. The highest median quantitative biofilm value within all the denture base materials was obtained with P. aeruginosa on Lucitone 550. The type of denture base material did not alter the diffusion potential of the microorganisms significantly (P>.05). CONCLUSION. All the tested microorganisms had destructive effect over the structure and composition of the denture base materials.
Seo, Bo-Yong;Kim, Young-Min;Choi, Jae-Won;Yun, Mi-Jung;Jeon, Young-Chan;Jeong, Chang-Mo;Kim, Gyu-Cheon;Huh, Jung-Bo
The Journal of Korean Academy of Prosthodontics
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v.53
no.1
/
pp.9-18
/
2015
Purpose: The purpose of this study is to examine characteristics of implant surface with RBM and anodizing treatments, and to evaluate the responses of osteoblast-like cell (MG-63 cell). Materials and methods: Grade IV titanium disks were fabricated (Diameter 10 mm, thickness 3 mm). Anodizing treatment (ASD) group, RBM and anodizing treatment (RBM/ASD) group, control (machined surface) group were divided. In this study, osteoblast-like cell was used for experiments. The experiments consist of surface characteristics evaluation by FE-SEM images, energy dispersive spectroscopy and stereo-SEM. In order to evaluate cell adhesion evaluation by crystal violet assay and observe cells form by confocal laser microscopy. To assess cell proliferation by XTT assay, cell differentiation by RT-PCR and mineralization by Alizarin red S stain assay. ELISA analyzer was used for Quantitative evaluation. Comparative analysis was run by one-way ANOVA (SPSS version 18.0). Differences were considered statistically significant at P<.05. Results: In ASD group and RBM/ASD group, the surface shape of the crater was observed and components of oxygen and phosphate ions in comparison with the control group were detected. The surface average roughness was obtained $0.08{\pm}0.04{\mu}m$ in the control group, $0.52{\pm}0.14{\mu}m$ in ASD group and $1.45{\pm}0.25{\mu}m$ in RBM/ASD group. In cell response experiments, ASD group and RBM/ASD group were significantly higher values than control group in cell adhesion and mineralization phase, control group was the highest values in the proliferative phase. In RT-PCR experiments, RBM/ASD group was showed higher ALP activity than other groups. RBM/ASD group in comparison with ASD group was significantly higher value for cell adhesion and proliferation phase. Conclusion: In the limitation of this study, we are concluded that the surface treatment with RBM/ASD seems more effective than ASD alone or machined surface on cellular response.
Kim, Myung-Hoon;Ahn, Joong-Hyun;Moon, Hwa-Sik;Park, Sung-Hak;Song, Jeong-Sup
Tuberculosis and Respiratory Diseases
/
v.45
no.6
/
pp.1167-1177
/
1998
Background : Pulmonary tuberculosis is one of the diseases characterized granuloma formation which was controlled by cellular immune reactions. In the process of granulomatous changes, activated alveolar macrophages and T lymphocytes secrete many cytokines including interleukin-1 (IL-1), tumor necrosis factor-alpha(TNF-$\alpha$), interferon-gamma(IFN-$\gamma$) which mediate inflammatory reactions. Intercelluar adhesion molecule-1(ICAM-1) also known to major role player in inflammatory processes, and increased cellular expressions when endothelial cell was stimulated by IL-1, TNF and IFN. Method : To evaluate relationships among cellular immune reactions and clinical stages, pulmonary tuberculosis patients were classified into three groups according to their clinical stages including minimal, moderate and far advanced tuberculosis. TNF-$\alpha$ IFN-$\gamma$, sICAM-1 (soluble form of ICAM-1) were measured at the time of diagnosis and after 6-months anti-tuberculosis medications by radioimmuno assay or enzyme linked immunosolvent assay. Result : TNF-$\alpha$, IFN-$\gamma$, sICAM-1 were significantly increased in moderate and far advanced pulmonary tuberculosis patients but no meaningful changes in minimal staged patients. 6-months anti-tuberculosis medications reduced serum sICAM-1 levels significantly, related to clinical improvement but no significant changes were found in the serum levels of TNF-$\alpha$ and IFN-$\gamma$. In the point of correlations. positive ones revealed between TNF-$\alpha$ and sICAM-1, also between IFN-$\gamma$ and sICAM-1 but no correlation between TNF-$\alpha$ and IFN-$\gamma$. Conclusion : Measurement of serum sICAM-1 could be useful parameter to evaluate the severity of pulmonary tuberculosis and to monitor disease activities during anti-tuberculosis medications.
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