• Title/Summary/Keyword: chemotaxis

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Effect of Citric Acid and Tetracycline HCl Root Conditioning on rhBMP-2 on Human Periodontal Ligament Fibroblast and Osteoblast cell (구연산과 테트라싸이클린으로 처리한 치근면에서 rhBMP-2가 치주인대섬유아세포와 골아세포의 활성에 미치는 영향)

  • Shim, Jung-Min;Han, Soo-Boo;Seol, Yang-Jo;Lee, Yong-Moo;Kim, Kyeong-Hwa;Kye, Seung-Beom;Choi, Sang-Mook;Chung, Chong-Pyoung
    • Journal of Periodontal and Implant Science
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    • v.31 no.1
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    • pp.21-41
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    • 2001
  • The goal of Periodontal treatment is predictable periodontal regeneration. But until now, many products including GTR materials and growth factors are beyond of complete regeneration. BMP can induce ectopic bone formation when implanted into sites such as rat muscle and can greatly enhance healing of bony defects when applied exogenously. BMP can promote periodontal regeneration by their ability to stimulate new bone and new cementum formation. But little is known about optimal conditions required for the application. Root conditioning is used for bioacive root change so altered root surface provides a substrate that promotes chemotaxis, migration and attachment of peridontal cells encouraging connective attachment to the denuded root surface. The aim of this study is to investigate whether the acid conditioning change effect of rhBMP-2 on human periodontal ligament cell and osteoblast cell line. 288 periodontally involved root dentin slices are divided into 6 groups, each 48, 1)control, 2)treated with BMP, 3)treated with citric acid 4)treated with citric acid+BMP 5)treated with tetracycline 6)treated with TC+BMP. Each group was devided half, so 12 root dentin slices were seeded with periodontal ligament cells and 12 were seeded with osteoblasts. At day 2 and 7, cell number, protein assay, ALP activitiy was measured. To investigate morphology of cultured cells, SEM was employed. Statistical analysis was performed with SPSS 8.0 either t-test or ANOVA test. The results are ; Protein assay and cell number was slightly decreased in CA+BMP group compared to Ca group but it was not statistically significant and ALP activity was much more increased in CA+BMP group compared to CA group so there was no statistically significance between BMP and CA+BMP group and statistically significant compared to control group. Cell number and protein assay was slightly increased in TC group and ALP activity was much less the BMP group and CA group. Cell number and protein and ALP activity was not much increased in TC+BMP group. TC group and TC+BMP group showed cell morphology change in SEM. This results suggested that application of root surface with citric acid before BMP treatment might give better result in periodontal regeneration.

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GENE EXPRESSION CHARACTERISTICS OF PUTATIVE PROINFLAMMATORY CYTOKINES AND RECEPTOR MOLECULE CLONING (Putative proinflammatory cytokine유전자의 발현양상과 수용체 분자의 cloing)

  • Oh, Kwi-Ok;Song, Yo-Han;Seo, Young-Seok;Lee, Dong-Whan;Moon, Dae-Hee;Kim, Hyung-Seop
    • Journal of Periodontal and Implant Science
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    • v.24 no.3
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    • pp.472-482
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    • 1994
  • Cytokines expressed specifically in leukocytes subsets and in activated cells, which are involved in chemotaxis and activation of leukocytes, are recently defined as chemokines. Macrophage inflammatory $protein-1{\alpha}(MIP-1{\alpha})$ and $MIP-1{\beta}$ are members of C-C chemokine subfamily which produces wide immunomodulatory, proinflammatory, and hematopoietic modulatory actions. We have studied their gene expression by using Northern blot analysis in various blood cells such as cytolytic T lymphocyte(CTL), helper T lymphocyte(HTL), macrophage, and B lymphocyte. Resting CTL line CTLL-R8 expressed $MIP-1{\alpha}$ mRNA which was downregulated by ConA stimulation. Both of resting and ConA stimulated HTL line Hut78 and Jurkat did not express $MIP-1{\alpha}$ mRNA. There was detectable $MIP-1{\alpha}$ transcript in HTL hybridoma 2B4.11 which was a little upstimulated by ConA stimulation. B cell line 230, and macrophage cell line RAW264.7 and WR19M.1 showed distinct $MIP-1{\alpha}$ message which were induced after LPS stimulation. Expression pattern of $MIP-1{\beta}$ in all cell lines or cell were almost identical to that of $MIP-1{\alpha}$. Also strategies employed to identify and characterize the biological functions was preceded by receptor cloning to trace the shorcut to the final goal of cytokine research. For the cloning of $MIP-1{\alpha}$ receptor(R), we used synthetic oligonucleotides of transmembrane(T) conserved sequences of already cloned human(h) IL-8-R, and performed reverse transcription-polymerase chain reaction(RT-PCR) amplification using murine(m) macrophage cell line mRNA. Among 5RT-PCR products, we isolated a homologous cDNA with hIL-8-R which were shown to be putative mIL-8-R cDNA.

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Effect of Progesterone, Estradiol 17 beta and Cholesterol on Sperm Swim-up Separation through Sucrose Layer (Progesterone, Estradiol 17 beta 및 Cholesterol Sucrose 층으로부터 정자의 Swim-up 분리에 미치는 영향)

  • 김경화;여영근;박영식
    • Journal of Embryo Transfer
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    • v.13 no.3
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    • pp.291-300
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    • 1998
  • This study was carried out to elucidate the effect of progesterone, estradiol 17 beta and cholesterol in follicular fluid on sperm chemotaxis for fertilization. By inducing swim-up migration through sucrose layer into bMSS containing progesterone, estradiol 17 beta and/or cholesterol, their effects on sperm migration and sperm movement were examined. And the results obtained were as follows; 1. Progesterone inhibited sperm migration and movement, but significantly attracted capacitated-sperm at the level of 50 $\mu$g/ml. 2. Estradiol 17 beta inhibited sperm migration and movement, but didn't significantly inhibit migration of capacitated-sperm at the level of 10$\mu$g/ml. 3. Cholesterol significantly stimulated sperm migration and movement at the level of 50$\mu$g/ml, but didn't attact capacitated-sperm. 4. Progesterone and estradiol 17 beta reduced the effect of cholesterol stimulating sperm migration and movement. But estradiol 17 beta and cholesterol didn't reduce the effect of progesterone attracting capacitated-sperm. In conclusion, progesterone of 50$\mu$g/ml in bMSS attracted the capacitated-sperm, cholesterol of 50$\mu$g/ml stimulated sperm migration and movement, but estradiol 17 beta of 10$\mu$g/ml didn't affect sperm swim-up separation.

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Effects of Some Metabolic Inhibitors on Phototactic Movement in Cyanobacterium Synechosystis sp. PCC 6803 PTX (람세균 Synechocystis sp. PCC 6803 PTX의 주광성 운동에 미치는 몇가지 대사 억제제의 효과)

  • 박영총
    • Journal of Plant Biology
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    • v.38 no.1
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    • pp.87-93
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    • 1995
  • For understanding physiological nature of phototaxis in Synechocystis sp. PCC 6803 PTX(S. 6803 PTX), we examined the effects of some metabolic inhibitors and cation ionophore on the phototactic movement. In the presence of DCMU, which blocks the photosynthetic electron transport just after photosystem II acceptor, there was no inhibitory effect on the phototaxis up to $100\;\mu\textrm{M}$. Instead, the respiratory electron chain inhibitor such as sodium azide dramatically impaired the phototaxis in S. 6803 PTX. These observations indicate that the phototaxis is linked not to photo-phosphorylation, but to respiratory phosphorylation. When the cells were treated with un couplers such as CCCP or DNP, which dissipate the electrochemical gradient of proton($\Delta\mu_{H}+$) across the cytoplasmic membrane, these chemicals did not affect phototaxis. In contrast, when cells were treated with DCCD or NBD which deprive cells of A TP but leave $\Delta\mu_{H}+$ intact across the membrane, the phototactic movement was severly reduced. These results imply that ATP production, not proton motive force, is involved in the phototactic movement in this organism as a driving motive force. The application of specific calcium ionophore A23187 strongly impaired positive phototaxis. Calcium fluxes should be engaged in the sensory trans-duction of phototactic orientation. Finally, when ethionine was supplimented to culture media, the photomovement of this organism was inhibited. This implies that methylation/demethylation mechanism controls the process of phototaxis in S. 6803 PTX like chemotaxis in E. coli and Salmonella typhimurium.murium.

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Seed-borne Pathogenic Bacterium Interact with Air-borne Plant Pathogenic Fungus in Rice Fields

  • Jung, Boknam;Park, Jungwook;Kim, Namgyu;Li, Taiying;Kim, Soyeon;Bartley, Laura E.;Kim, Jinnyun;Kim, Inyoung;Kang, Yoonhee;Yun, Ki-Hoon;Choi, Younghae;Lee, Hyun-Hee;Lee, Kwang Sik;Kim, Bo Yeon;Shon, Jong Cheol;Kim, Won Cheol;Liu, Kwang-Hyeon;Yoon, Dahye;Kim, Suhkman;Ji, Sungyeon;Seo, Young Su;Lee, Jungkwan
    • 한국균학회소식:학술대회논문집
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    • 2018.05a
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    • pp.33-33
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    • 2018
  • Air-borne plant pathogenic fungus Fusarium graminearum and seed-borne plant pathogenic bacterium Burkholderia glumae are cause similar disease symptoms in rice heads. Here we showed that two pathogens frequently co-isolated in rice heads and F. graminearum is resistant to toxoflavin produced by B. glumae while other fungal genera are sensitive to the toxin. We have tried to clarify the resistant mechanism of F. graminearum against toxoflavin and the ecological reason of co-existence of the two pathogens in rice. We found that F. graminearum carries resistance to toxoflavin as accumulating lipid in fungal cells. Co-cultivation of two pathogens resulted in increased conidia and enhanced chemical attraction and attachment of the bacterial cells to the fungal conidia. Bacteria physically attached to fungal conidia, which protected bacterium cells from UV light and allowed disease dispersal. Chemotaxis analysis showed that bacterial cells moved toward the fungal exudation compared to a control. Even enhanced the production of phytotoxic trichothecene by the fungal under presence of toxoflavin and disease severity on rice heads was significantly increased by co-inoculation rather than single inoculation. This study suggested that the undisclosed potentiality of air-born infection of bacteria using the fungal spores for survival and dispersal.

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Germanium-Fortified Yeast Activates Macrophage, NK Cells and B Cells and Inhibits Tumor Progression in Mice. (게르마늄 강화효모의 마우스에서의 암세포 억제 및 대식세포, NK 세포, B 세포의 활성화에 관한 연구)

  • Baek, Dae-Heoun;Jung, Jin-Wook;Sohn, Tsang-Uk;Kang, Jong-Koo
    • Microbiology and Biotechnology Letters
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    • v.35 no.2
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    • pp.118-127
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    • 2007
  • Germanium-fortified yeast (GY) is a organic germanium-fortified yeast with potent immune modulating activities including anti-inflammatory effect. Through cell line studies, we observed that GY can modulate the diverse immune activity but little evidence was provided on the mechanism of GY in modulating immune activities in other higher animals. In this study, we investigated the effect of GY on modulation of immune function in mice. GY was administered in normal mice or tumor-bearing mice and then effect of GY on modulation of host immune system was analyzed by using ex vivo isolated macrophages, B cells, NK cells. Admistration of GY in mice induced macrophage activation thereby increased effector function of macrophage such as increased phagocytosis, chemotaxis, adherence, $O_2-release$, NO, $TNF-{\alpha}$ production. In addition, GY administration Increased B lymphocyte activation and plaque forming cells. Furthermore, GY administration increased NK-cell mediated cytotoxicity. Furthermore, GY administration suppressed progression of tumor in mice by increasing $TNF-{\alpha}$ production and effector function of NK cells. Our results showed that GY has a potent immunostimulatory function in vivo mice model. Proper modulation and administration of GY in human could be helpful to maintaining immunological homeostasis by modulating host immune system.

Chunghyul-dan acts as an anti-inflammatory agent in endothelial cells by regulating gene expression

  • Jung, Woo-Sang;Cho, Jin-Gu;In, Kyung-Min;Kim, Jong-Min;Cho, Ki-Ho;Park, Jung-Mi;Moon, Sang-Kwan;Kim, Kyung-Wook;Park, Seong-Uk;Pyee, Jae-Ho;Park, Sang-Gyu;Jeong, Yoon-Hwa;Park, Heon-Yong;Ko, Chang-Nam
    • Animal cells and systems
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    • v.14 no.4
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    • pp.275-282
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    • 2010
  • Chunghyul-dan (CHD) is a combinatorial drug known to exert anti-inflammatory effects in endothelial cells. In this study, we employed global transcriptional profiling using cDNA microarrays to identify molecular mechanisms responsible for the anti-inflammatory activity of CHD in endothelial cells. An analysis of the microarray data revealed that transcript levels of monocyte chemotactic protein-1 (MCP-1), vascular cell-adhesion molecule-1 (VCAM-1) and activated leukocyte cell-adhesion molecule were dramatically altered in CHD-treated endothelial cells. These changes in gene expression were confirmed by RT-PCR, Western blotting and ELISA. Chronic CHD treatment also appeared to decrease MCP-1 secretion, probably as a result of decreased MCP-1 expression. In addition, we determined that chronic CHD treatment inhibited lipopolysaccharide-stimulated adhesion of THP-1 leukocytes to endothelial cells. The inhibitory effect of CHD on LPS-stimulated adhesion resulted from downregulation of VCAM-1 expression. Transmigration of THP-1 leukocytes through endothelial cells was also inhibited by chronic CHD treatment. In conclusion, CHD controls a variety of inflammatory activities by regulating MCP-1 and VCAM-1 gene expression.

Change of Soluble RANTES Levels in Serum from Pateints with Atopic Bronchial Asthma (기관지 천식 환자에서 기관지 특이항원 유발검사후 RANTES농도의 변화)

  • Rhee, Yang-Keun;Kim, Jae-Hean;Lee, Yong-Chul
    • Tuberculosis and Respiratory Diseases
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    • v.43 no.2
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    • pp.182-189
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    • 1996
  • Background : RANTES is associated with chemotaxis and activation of eosinophils. RANTES is up-regulated in allegic inflammation and play a critical role in the pathogenesis of allegic inflammation. Recently, circulating form of RANTES have been identified in the peripheral blood. Method : In the present study, we measured soluble RANTES levels in 17 patients with atopic brochial asthma (8 patients: early response to allegen challenge, 8 patients : early and late response to allergen challenge) on 30mins, 2hrs and 8 hrs after allergen challenge with house dust mite, prechallenge period. Result : RANTES levels in sera from patients with bronchial astma in prechallenge conditions were higher than in normal control subjects. But, RANTES levels in sera from patients with bronchial asthma in 30mins, 2hrs and 8hrs after challenge were no significantly higher than prechallenge conditions. Conclusion : These results suggest that RANTES plays a role in the pathogenesis of patients with atopic bronchial asthma and may be related to persistence of subclinical allergic inflammation.

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Prediction of itching diagnostic marker through RNA sequencing of contact hypersensitivity and skin scratching stimulation mice models

  • Kim, Young-Won;Zhou, Tong;Ko, Eun-A;Kim, Seongtae;Lee, Donghee;Seo, Yelim;Kwon, Nahee;Choi, Taeyeon;Lim, Heejung;Cho, Sungvin;Bae, Gwanhui;Hwang, Yuseong;Kim, Dojin;Park, Hyewon;Lee, Minjae;Jang, Eunkyung;Choi, Jeongyoon;Bae, Hyemi;Lim, Inja;Bang, Hyoweon;Ko, Jae-Hong
    • The Korean Journal of Physiology and Pharmacology
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    • v.23 no.2
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    • pp.151-159
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    • 2019
  • Pruritus (itching) is classically defined as an unpleasant cutaneous sensation that leads to scratching behavior. Although the scientific criteria of classification for pruritic diseases are not clear, it can be divided as acute or chronic by duration of symptoms. In this study, we investigated whether skin injury caused by chemical (contact hypersensitivity, CHS) or physical (skin-scratching stimulation, SSS) stimuli causes initial pruritus and analyzed gene expression profiles systemically to determine how changes in skin gene expression in the affected area are related to itching. In both CHS and SSS, we ranked the Gene Ontology Biological Process terms that are generally associated with changes. The factors associated with upregulation were keratinization, inflammatory response and neutrophil chemotaxis. The Kyoto Encyclopedia of Genes and Genomes pathway shows the difference of immune system, cell growth and death, signaling molecules and interactions, and signal transduction pathways. Il1a, Il1b and Il22 were upregulated in the CHS, and Tnf, Tnfrsf1b, Il1b, Il1r1 and Il6 were upregulated in the SSS. Trpc1 channel genes were observed in representative itching-related candidate genes. By comparing and analyzing RNA-sequencing data obtained from the skin tissue of each animal model in these characteristic stages, it is possible to find useful diagnostic markers for the treatment of itching, to diagnose itching causes and to apply customized treatment.

The complete genome sequence of a marine sponge-associated bacteria, Bacillus safensis KCTC 12796BP, which produces the anti-allergic compounds (해양 해면체로부터 분리한 세균으로 항알러지성물질을 생산하는 Bacillus safensis KCTC 12796BP의 유전체 해독)

  • Hanh, Nguyen Phan Kieu;Kim, Soo Hee;Kim, Geum Jin;Choi, Hyukjae;Nam, Doo Hyun
    • Korean Journal of Microbiology
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    • v.54 no.4
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    • pp.448-452
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    • 2018
  • The full genome sequence of Bacillus safensis KCTC 12796BP which had been isolated from the marine sponge in the seawater of Jeju Island, was determined by Pac-Bio next-generation sequencing system. A circular chromosome in the length of 3,935,874 bp was obtained in addition to a circular form of plasmid having 36,690 bp. The G + C content of chromosome was 41.4%, and that of plasmid was 37.3%. The number of deduced CDSs in the chromosome was 3,980, whereas 36 CDS regions were determined in a plasmid. Among the deduced CDSs in chromosome, 81 tRNA genes and 24 rRNA genes in addition to one tmRNA were allocated. More than 30 CDSs for sporulation, 16 CDSs for spore coat, and 20 CDSs for germination were also assigned in the chromosome. Several genes for capsular polysaccharide biosynthesis and for flagella biosynthesis and chemotaxis in addition to genes for osmotic tolerance through glycine-choline betaine pathway were also identified. Above all, the biosynthetic gene cluster for anti-allergic compounds seongsanamides were found among two non-ribosomal peptide synthetase (NRPS) gene clusters for secondary metabolites.