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Yoon J, Walker F, Cartwright M. 44. Ultrasonographic diagnostic value of area ratio in ulnar neuropathy at the elbow. Clin Neurophysiol 2009. [DOI: 10.1016/j.clinph.2008.10.062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Matrone M, Whipple R, Balzer E, Cho E, Yoon J, Martin S. Metastasis-associated microtentacles are induced in detached and circulating breast tumor cells by expression of the microtubule-binding protein, Tau. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-55] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Abstract #55
Detached human breast tumor cell lines produce microtentacles composed of a unique kinesin-dependent coordination of vimentin filaments and detyrosinated microtubules. Compelling in vivo studies show that a mechanism consistent with microtentacles is responsible for the attachment of circulating tumor cells to blood vessel walls. However, the molecular regulators of microtentacle extension have only begun to be defined. Increased expression of the microtubule-binding protein, Tau, is associated with poor patient outcome in breast cancer, but the mechanism by which Tau protein affects prognosis remains unclear. We report here that expression of Tau directly regulates the formation of metastasis-associated microtentacles in detached and circulating breast tumor cells. First, increased expression of Tau correlates with increased microtentacle frequency in a panel of human breast tumor cell lines. Endogenous Tau protein colocalizes with tubulin microtentacles in cells detached from extracellular matrix. Exogenous expression of Tau significantly increases microtentacle frequency in weakly invasive breast tumor cell lines. Tau-induced microtentacles are longer, thicker and more rigid than those in cell lines without Tau expression. Although there is increasing interest in targeting the actin cytoskeleton to reduce tumor cell motility and division, our results indicate that breast tumor cells with high Tau expression have particularly dramatic increases in microtentacles when treated with inhibitors of actin polymerization. Likewise, tubulin-stabilizing compounds, like paclitaxel, increase microtentacles and may be ill-advised in patients with high Tau expression. Indeed, clinical studies show that high Tau expression increases the likelihood of recurrence following paclitaxel treatment. We observed an enrichment of Tau in metastatic tumors compared to matched primary tumors. So while stabilizing microtubules and disrupting actin filaments can each decrease tumor cell growth, it is important to consider the effects of these treatments on Tau-expressing cells to avoid accidentally enhancing the metastatic potential of circulating tumor cells while targeting cell division.
Citation Information: Cancer Res 2009;69(2 Suppl):Abstract nr 55.
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Park M, Yoon J, Lee J, Choi M, Youn H, Jung S. GSTP1 promoter hypermethylation during breast cancer development. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-5042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Abstract #5042
Background. Promoter hypermethylation in precursor lesions of the breast cancer may be biomarkers of cancer risk and targets for cancer chemoprevention. GSTP1 is inactivated by promotor hypermethylation in invasive breast cancers. However, little is known about epigenetic silencing of GSTP1 gene by promoter hypermethylation in precursor lesions.
 Method. To determine the significance of GSTP1 promoter hypermethylation in breast carcinogenesis, methylation status of GSTP1 gene was studied by nested methylation-specific PCR and GSTP1 expression was studied by immunohistochemistry in invasive ductal carcinoma (IDC), ductal carcinoma in situ (DCIS), usual ductal hyperplasia (UDH) and normal breast tissue.
 Results. GSTP1 promoter hypermethylation was detected in 4/24 (16.7%) of UDH, 18/49 (36.7%) of DCIS, and 14/36 (38.9%) of IDC. No hypermethylation was detected in normal breast tissues. GSTP1 promoter hypermethylation was found to be progressively elevated during breast carcinogenesis (P < 0.01). GSTP1 promoter hypermethylation was associated with loss of GSTP1 expression (P < 0.01 for UDH, P < 0.001 for DCIS and IDC).
 Conclusion. Our results suggest that GSTP1 promoter hypermethylation is an early event in breast carcinogenesis and appears to functionally silence GSTP1 expression. GSTP1 promoter hypermethylation in the precursor lesions of breast cancer may be used as a target for cancer chemoprevention.
Citation Information: Cancer Res 2009;69(2 Suppl):Abstract nr 5042.
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Youn H, Lee B, Jung S, Park M, Yoon J, Lee J, Choi M. Induction of cell cycle arrest and apoptosis in breast cancer cells by troglitazone, a peroxisome proliferator-activated receptor-gamma (PPAR-γ) ligand. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-5034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Abstract #5034
Background: Peroxisome proliferator-activated receptor-gamma(PPAR-γ) ligands inhibit cell proliferation and induce apoptosis in cancer cells. And, it is reported that PPAR-γ ligands could serve as negative regulators of breast cancer development and progression, but their mechanism is still unknown. Here we wished to determine whether the PPAR-γ ligand induces cell cycle arrest and apoptosis of MDA-MB-231(ERα-negative) and MCF-7(ERα-positive) breast cancer cell.
 Methods: The effect of PPAR-γ ligands on the cell viability of breast cancer cells was determined using mitochondrial tetrazolium(MTT) assay. The cell cycle distribution and apoptosis induction were evaluated by using the flow cytometry. The expression of apoptosis-related proteins were measured with Western blot analysis. Statistical analysis was performed using Student's t test, and p<0.05 was considered significant.
 Results: The treatment of MDA-MB-231 cell with PPAR-γ ligand, troglitazone was shown to induce cell cycle G1 arrest and induction of apoptosis. Moreover, troglitazone treatment, applied in a dose-dependent manner, caused a marked decrease in phosphorylated retinoblastoma(pRb), cyclin D1, D2, D3, cyclin dependent kinase(Cdk) 2, 4, and 6 expression as well as a significant increase in Cdk inhibitor, p21 and p27. Troglitazone showed antiproliferative effect on MCF-7 cell with tamoxifen, respectively and synergically. Troglitazone and tamoxifen could induce G1 arrest and apoptosis of MCF-7 cell, through upregulation of Bax and downregulation of Bcl-2 and cyclin D1.
 Conclusion: PPAR-γ ligand, troglitazone induces cell cycle arrest and apoptosis of MDA-MB-231 cell and increases the sensitivity of anti-hormonal therapy in MCF-7 cell. These results suggest that troglitazone has anticancer effect on both ERα-negative and positive breast cancer cells.
Citation Information: Cancer Res 2009;69(2 Suppl):Abstract nr 5034.
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Kim E, Choi Y, Lee S, Seo Y, Yoon J, Baek K. Characterization of the Drosophila melanogaster retinin gene encoding a cornea-specific protein. INSECT MOLECULAR BIOLOGY 2008; 17:537-543. [PMID: 18828839 DOI: 10.1111/j.1365-2583.2008.00822.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Two-dimensional analysis of head extracts from Drosophila melanogaster identified the four eye-specific protein spots corresponding to the retinin protein. The retinin protein spots were specifically stained with phosphoprotein-specific dye, suggesting that the retinin protein undergoes post-translational modification by phosphorylation. Northern blot analysis showed that the retinin gene begins to be expressed during the late stage of puparium formation during development. Analysis of the N-terminal sequence and expression of the retinin gene in S2 suggest that retinin is a secretory protein. Transgenic flies with knockdown expression of the retinin gene by RNA interference (RNAi) were established. However, no significant phenotypic changes in eye structure or phototransduction were observed in the transgenic flies. Western blot analysis and immunohistochemical studies of D. melanogaster eyes suggest that retinin is a cornea-specific protein.
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MESH Headings
- Amino Acid Sequence
- Animals
- Animals, Genetically Modified
- Base Sequence
- Blotting, Northern
- Blotting, Western
- Cell Line
- Cornea/metabolism
- Drosophila Proteins/chemistry
- Drosophila Proteins/genetics
- Drosophila Proteins/metabolism
- Drosophila melanogaster/cytology
- Drosophila melanogaster/genetics
- Electrophoresis, Gel, Two-Dimensional
- Eye Proteins/chemistry
- Eye Proteins/genetics
- Eye Proteins/metabolism
- Gene Expression Regulation, Developmental
- Genes, Insect
- Genome
- Molecular Sequence Data
- Organ Specificity
- Protein Processing, Post-Translational
- Protein Transport
- RNA Interference
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
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Yoon J, Juhn KM, Ko JK, Yoon SH, Ko Y, Lim JH. Effects of oxygen tension and IGF-I on embryonic development and oxygen-regulated gene expression in mice. Fertil Steril 2008. [DOI: 10.1016/j.fertnstert.2008.07.1330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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207
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Yoon J, Chung J, Lee J, Jung W, Suh T. SU-GG-J-69: Development of a Programmable Moving Phantom for the Verification of 4D Dose Delivery. Med Phys 2008. [DOI: 10.1118/1.2961619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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208
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Yoon J, Matsuo Y, Adachi K, Nozawa M, Matsuda S, Kasai H, Yokota A. Description of Persicirhabdus sediminis gen. nov., sp. nov., Roseibacillus ishigakijimensis gen. nov., sp. nov., Roseibacillus ponti sp. nov., Roseibacillus persicicus sp. nov., Luteolibacter pohnpeiensis gen. nov., sp. nov. and Luteolibacter algae sp. nov., six marine members of the phylum 'Verrucomicrobia', and emended descriptions of the class Verrucomicrobiae, the order Verrucomicrobiales and the family Verrucomicrobiaceae. Int J Syst Evol Microbiol 2008; 58:998-1007. [DOI: 10.1099/ijs.0.65520-0] [Citation(s) in RCA: 100] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Chang J, Jung J, Jeong Y, Hong K, Kim K, Yoon J, Choi M. What is your diagnosis? Emphysematous pyometra with a large amount of gas. J Small Anim Pract 2008; 48:717-9. [PMID: 18045381 DOI: 10.1111/j.1748-5827.2007.00433.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Cho M, Yoon J. Measurement of OH radical CT for inactivating Cryptosporidium parvum using photo/ferrioxalate and photo/TiO2 systems. J Appl Microbiol 2008; 104:759-66. [PMID: 18266706 DOI: 10.1111/j.1365-2672.2007.03682.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIM This study investigates the inactivation of Cryptosporidium parvum using the OH radical and reports the OH radical CT (OH radical concentration x contact time) values for C. parvum inactivation. METHODS AND RESULTS Although a wealth of information has demonstrated the efficacy of the microbial inactivation activity of the OH radical, no studies have performed a quantitative estimation of the OH radical for C. parvum inactivation. The CT value of the OH radical required for 2 log C. parvum inactivation was measured with two OH radical-generating systems, photo/ferrioxalate and photo/TiO2. The OH radical was approx. 10(4)-10(7)-fold more effective for microbial inactivation than other popular chemical disinfectants such as ozone, chlorine dioxide and free chlorine. CONCLUSIONS The OH radical appears to be suitable for microbial inactivation with a calculated CT value required for 2 log C. parvum inactivation of 9.3 x 10(-5) mg min l(-1). SIGNIFICANCE AND IMPACT OF THE STUDY This study is the first report of an investigation on the role of the OH radical in the photo/ferrioxalate and photo/TiO2 systems and on the OH radical CT required for C. parvum inactivation.
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Kim S, Yoon J, Chae S, Choi Y, Kim S, Moon S. An efficient and reliable DNA extraction method for preimplantation genetic diagnosis: a comparison of allele drop-out and amplification rate using different single cell lysis methods. Fertil Steril 2007. [DOI: 10.1016/j.fertnstert.2007.07.807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ragland JD, Yoon J, Minzenberg MJ, Carter CS. Neuroimaging of cognitive disability in schizophrenia: search for a pathophysiological mechanism. Int Rev Psychiatry 2007; 19:417-27. [PMID: 17671874 PMCID: PMC4332575 DOI: 10.1080/09540260701486365] [Citation(s) in RCA: 111] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
This article reviews how functional neuroimaging research of cognitive dysfunction in schizophrenia has resulted in a progression of influential pathophysiological models of the disorder. The review begins with discussion of the 'hypofrontality' model, moving from resting studies examining anterior to posterior gradients of cerebral blood flow (CBF), to cognitive activation studies employing the Wisconsin Card Sorting Test, and current functional magnetic resonance imaging (fMRI) studies of working memory and cognitive control utilizing parametric task designs and event-related procedures. A similar progression is described for development of the temporal lobe model of schizophrenia, moving from research on the temporal cortex and language processing to the hippocampal formation and long-term memory (LTM). These LTM studies found that hippocampal dysfunction was often accompanied by disrupted prefrontal function, supporting a hybrid model of impaired fronto-temporal connectivity. Developments in image analysis procedures are described that allow assessment of these distributed network models. However, given limitations in temporal and spatial resolution, current methods do not provide 'real-time' imaging of network activity, making arrival at a definitive pathophysiologic mechanism difficult. Dorsolateral prefrontal cortex (DLPFC) dysfunction and disrupted fronto-temporal integration appear to be equally viable current models. The article concludes with a discussion of how fMRI can help facilitate development of novel psychosocial and pharmacological interventions designed to improve cognition and functional outcome in patients with schizophrenia.
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Pavlick AC, Liebes L, Brooks P, Yoon J, Hamilton A, Yee H, Polsky D, Buckley M, Wright J, Osman I. BAY 43–9006 (sorafenib-BAY) alters proliferation pathways and mutant specific-PCR (MS-PCR) improves detection of BRAF mutations in metastatic melanoma (MM). J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.8542] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
8542 Background: Approximately 60% of melanomas carry BRAF mutations (mut). BAY is a multi-kinase inhibitor that inhibits the BRAF pathway. A phase II trial of BAY in MM is being conducted to: 1) determine if treatment (tx) with BAY can alter proliferation as measured by cyclin D1, Ki-67 and ERK, 2) assess for differential anti-tumor responses and 3) to assess a newly developed fluorescent-based PCR assay to detect mutant BRAF. Methods: Eligibility criteria: Biopsy (bx)-accessible, untreated MM. Measurable disease (RECIST). Stratification of tumor BRAF status determined by routine PCR sequencing for codon 600 mut prior to tx and fluorescent MS-PCR sequencing for confirmation. MS-PCR specifically amplified the M-BRAF allele without amplifying the wild-type (WT)allele. Tx: BAY 400 mg po BID D1–28 q4w. Repeat bx on Day 28. Bx assessed for Ki-67, cyclin-D1 and ERK. Serum collagen cryptic epitopes were measured serially. Re-imaging was done every 2 cycles and pts treated until POD. Results: 29 pts (9-M1a, 8-M1b, 12-M1c) enrolled. 26 wild type (WT) and 3 mutant (M) BRAF by routine PCR. Due to the low yield of mut on routine PCR, MS-PCR was done. 6 mutants were detected in the first 16 pts with MS-PCR compared to 2 with routine sequencing. Median age: 68 (range 22–91). 8 pts with LDH ≥ 1.5 × nl. Tox: Gr I-diarrhea(7), alopecia(4), rash(6), mucositis(4), nausea(4), pain(4), hand-foot(2); Gr II- HTN(4), fatigue(2),mucositis(1), rash(3), pain(3), hand-foot(2); Gr III-hand-foot(1), rash(1), fatigue(1) and intestinal perforation(1). Responses: 12 NE (2 WD, 8 early POD, 1 tox, 1 too early); M BRAF- 1 PR (lymph nodes and large SQ arm masses) and 2 PD; WT BRAF- 1 PR, 7 POD after 2 cycles, 6 SD. Matched paired biopsies demonstrated down regulation of tumor ki-67, erk and cyclin-D1. Collagen cryptic epitopes correlated with tumor responses. Conclusions: MM patients with tumors that were molecularly characterized for BRAF mutational status were entered on this single agent BAY trial and responses were seen in both M and WT arms. Down-regulation of Ki-67, cyclin D1 and ERK was demonstrated and MS-PCR improved the sensitivity to detect BRAF mut. Supported by NCI N01-CM17103 and TRI. No significant financial relationships to disclose.
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Yoon J, Jung W, Suh T, Chung J. SU-FF-J-100: A PC-Based Multiple Respiratory Sensor System for the Correlation Study with An Organ Motion. Med Phys 2007. [DOI: 10.1118/1.2760605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Chung J, Lee J, Kim J, Yoon J, Jung W, Suh T. SU-FF-J-77: An Analysis of the Time Delay and Relationship Between External Sensor Signals and Internal Organ Motion for Respiratory Gated Radiotherapy. Med Phys 2007. [DOI: 10.1118/1.2760582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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216
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Cho M, Yoon J. Quantitative evaluation and application of Cryptosporidium parvum inactivation with ozone treatment. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2007; 55:241-50. [PMID: 17305146 DOI: 10.2166/wst.2007.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Despite a wealth of studies concerning the factors affecting the inactivation of Cryptosporidium parvum on ozone disinfection, practical approaches for predicting the inactivation level on ozone treatment system and determining the required ozone dose or contact time to achieve the required inactivation level remain unclear. When modified version of the "Delayed Chick-Watson model" was applied, the results show that Cryptosporidium parvum inactivation was well fitted with one unique line as "CTlag" and "inactivation slope" for several water parameters and water types. Thus, this study suggests quantitative methodology for predicting the Cryptosporidium parvum inactivation level with observation for the contact time of ozone and Cryptosporidium parvum and ozone residual.
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Cho W, Kim T, Kong G, Yoon J, Sung K. UP-02.18. Urology 2006. [DOI: 10.1016/j.urology.2006.08.759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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218
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Heo K, Yoon J, Jin KS, Jin S, Ree M. Characterisation of pore structures in nanoporous materials for advanced bionanotechnology. ACTA ACUST UNITED AC 2006; 153:121-8. [PMID: 16948496 DOI: 10.1049/ip-nbt:20050020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Porous materials are potential candidates for applications in various fields, such as bionanotechnology, gas separation, catalysts and micro-electronics. In particular, their applications in bionanotechnology include biosensors, biomedical implants and microdevices, biosupporters, bio-encapsules, biomolecule separations and biomedical therapy. All these bionanotechnology applications utilise the shape, size and size distribution of pores in porous materials. Therefore the controlled creation of pores with desired shape, size and size distribution is most important in the development of nanoporous materials. Accordingly, the accurate evaluation of pore structure is necessary in the development of nanoporous materials and their applications. This article reviews recent developments in analytical techniques to characterise the pore structures of nanoporous materials.
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Yoon J, Kim D, Kim S, Choe B, Suh T, Park Y, Lee J, Chung N, Lee H. SU-FF-I-50: A Mechanical Alignment Method for Removing Moiré Pattern in Digital Radiography with a Carbon-Interspaced Grid. Med Phys 2006. [DOI: 10.1118/1.2240290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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221
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Kim S, Lee H, Kim D, Yoon J, Suh T, Choe B. SU-FF-I-31: Diagnostic Utility Evaluation of a ASi:H/CsI(Tl) Flat-Panel Based Digital Radiography System. Med Phys 2006. [DOI: 10.1118/1.2240270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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222
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Yoon J, Lee M, Kim H, Kim J, Lee J. Comparisons of Cytokine Expression and Nuclear Factor-κB Activation between Respiratory Syncytial Virus Infected and Adenovirus Infected Human Bronchial Epithelial Cells. J Allergy Clin Immunol 2006. [DOI: 10.1016/j.jaci.2005.12.1258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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223
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Kim C, Yoon J. MUC8 as a Ciliated Cell Marker in Human Nasal Epithelium. J Allergy Clin Immunol 2006. [DOI: 10.1016/j.jaci.2005.12.663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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224
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Kim J, Yoon J, Ryu H, Choe H, Yoo B, Lee S, Choe K. Mo-P4:239 The diagnostic value of ischemia modified albumin according to the time interval from onset of chest pain. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)80372-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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225
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Jim J, Park H, Ryu H, Choi H, Yoo B, Lee S, Yoon J, Choe K. Mo-P4:238 Diagnostic value of simultaneous ankle-brachial pressure index and pulse wave velocity as markers for presence of coronary artery disease. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)80371-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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226
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Park M, Park H, Park E, Bae S, Kim K, Ko Y, Choi Y, Kim Y, Yoon J, Park J. Tu-P7:285 Decreased phosphorylation of heat shock protein 27 in human atherosclerotic plaques may be associated with the progression of the plaque. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)80988-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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227
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Lee B, Oh W, Yoon J, Hwang Y, Kim J, Landes BG, Quintana JP, Ree M. Scattering Studies of Nanoporous Organosilicate Thin Films Imprinted with Reactive Star Porogens. Macromolecules 2005. [DOI: 10.1021/ma0501951] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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228
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Yoon J, Yoon H, Yoon S, Ko Y, Lee W, Lim J. Effects of IGF-I and -II to Apoptosis Expression in Pre-Implantation Mouse Embryos. Fertil Steril 2005. [DOI: 10.1016/j.fertnstert.2005.07.1155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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229
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Yoon J, Lim J, Lim K, Park S, Jung J, Lee W. IVM of Oocytes Followed by IVF-ET in Patients With Delayed Follicular Growth During Controlled Ovarian Hyperstimulation. Fertil Steril 2005. [DOI: 10.1016/j.fertnstert.2005.07.129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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230
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Han D, Yoon J, Kang Y, Kim K, Park J, Kim Y. Identification and purification of a soluble region of BubR1. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305089282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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231
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Yoon J, Cha M. Initiative for the terminally ill on Medicare. J Palliat Med 2005; 2:369-70. [PMID: 15859775 DOI: 10.1089/jpm.1999.2.369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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232
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Yoon J, Amy G, Yoon Y. Transport of target anions, chromate (Cr (VI)), arsenate (As (V)), and perchlorate (ClO4-), through RO, NF, and UF membranes. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2005; 51:327-34. [PMID: 16003993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Rejection and transport of chromate (Cr (VI)), arsenate (As (V)), and perchlorate (ClO4-) by and through reverse osmosis, nanofiltration, and ultrafiltration were found to be affected by solution pH and ionic strength. In this study, the rejection of these target ionic contaminants increased with increasing pH at the same conductivity (ionic strength) for the tested membranes, regardless of salt type. General trends showed that the rejection followed the order: CaCl2 < KCl < or = K2SO4, at the same pH and conductivity condition. The rejection also significantly decreased as conductivity was increased regardless of the salt type. These results support the notion that a more negative surface charge due to increasing pH and/or decreasing ionic strength (conductivity) enhances rejection; lower molecular weight cut-off also enhances rejection. Measured values of hindered diffusion coefficient through the membrane pores (Dp) for the target contaminants significantly decreased as pH was increased, regardless of salt type at the same conductivity. At the same pH and conductivity, the Dp of the target contaminants follows the order: CaCl2 > KCl > K2SO4, in the presence of different types of salts. The Dp of the target contaminants significantly increased as conductivity was increased regardless of the salt type. The rejection data were modeled by application of a non-equilibrium thermodynamic model. The rejection model has five transport parameters: the molecular transport coefficient (omega), osmotic pressure gradient (deltaII), molecular reflection coefficient (sigma), the average bulk fluid interfacial concentration between the feed and permeate side (C(avg)), and the solvent flux (Jv). The transport parameters were determined by independent measurements (and calculation with minimum assumptions.) Measurements and predictions of the target contaminant transport were in good agreement.
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Yoon J, Yoon SH, Lee SY, Ko Y, Lee WD, Lim JH. Relationship between apoptosis and expression of IGF-I or II in mouse embryos fertilized in vivo or in vitro. Fertil Steril 2004. [DOI: 10.1016/j.fertnstert.2004.07.846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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234
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Byun S, Cho SH, Yoon J, Geissen SU, Vogelpohl A, Kim SM. Influence of mass transfer on the ozonation of wastewater from the glass fiber industry. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2004; 49:31-36. [PMID: 15077944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The mass transfer rate (kLa) is one of the most important parameters in the ozonation of wastewater, because it frequently constitutes the rate-determining step. This study investigated the influence of kLa on the ozonation of glass fiber wastewater using a high-performance jet loop reactor (HJLR), which is well known for its high mass transfer property, and compared the results of this investigation with those obtained using the bubble column reactor. It was found that the higher kLa achieved by increasing the energy input did not lead to higher ozonation efficiency, since the reaction involving the OH radical was greatly hindered at the low pH produced as a result of ozonation. By maintaining the pH at a value greater than 8.0, the higher kLa in the HJLR reactor contributed to increasing not only the TOC removal of wastewater, but also the ozone consumption efficiency, as expressed by the specific ozone consumption. The specific ozone consumption in the HJLR reactor (7.1 g ozone/ g TOC) was 20% better than that in the bubble column reactor.
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Auh JH, Kim YR, Cornillon P, Yoon J, Yoo SH, Park KH. Cryoprotection of protein by highly concentrated branched oligosaccharides. Int J Food Sci Technol 2003. [DOI: 10.1046/j.1365-2621.2003.00694.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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236
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Lee B, Shin T, Lee S, Yoon J, Kim J, Youn H, Ree M. Time-resolved X-ray scattering and calorimetric studies on the crystallization behaviors of poly(ethylene terephthalate) (PET) and its copolymers containing isophthalate units. POLYMER 2003. [DOI: 10.1016/s0032-3861(03)00130-7] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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237
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Lee J, Park H, Yoon J. Ozonation characteristics of bisphenol A in water. ENVIRONMENTAL TECHNOLOGY 2003; 24:241-248. [PMID: 12666793 DOI: 10.1080/09593330309385555] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Ozonation characteristics of bisphenol A were investigated as a function of gaseous ozone dose, initial concentration of bisphenol A, pH, radical scavenger (tert-butanol), and radical initiator (hydrogen peroxide). The ozonation led to a complete removal of bisphenol A in water within a certain period of time. The overall rate of the ozonation linearly increased with the ozone dose. The stoichiometry in the ozonation of bisphenol A was found to be 1.5 - 1.8 mole of ozone per mole of bisphenol A. The direct reaction rate constants were 1.3 x 10(4) M(-1)s(-1) for bisphenol A (at pH = 2) and 1.6 x 10(9) M(-1)s(-1) for dissociated bisphenol A (at pH = 12). Bisphenol A degraded via the direct reaction with molecular ozone in the pH range from 2 to 12. Degradation by OH radical was minor even at pH = 12. The overall degradation rate in heterogeneous conditions was independent of pH as it was limited by ozone mass transfer rate. Use of hydrogen peroxide did not alter the main degradation route and the molecular ozone remained a principal oxidant as a substantial portion of the OH radical is scavenged by hydrogen peroxide. Effective ozone mass transfer may appear essential to enhance the ozonation kinetics of bisphenol A.
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Kim J, Kim S, Yoon J. The evaluation of a density current experiment as a verification tool of a secondary clarifier model. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2003; 47:113-118. [PMID: 12926677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The prediction of the spatial and temporal flow regime is important for the efficient design and operation of the settling tank. The impact of the gravity current has been investigated by the temperature difference or artificial glass particles. This experimental study is designed to obtain the steady state of stratified flow with the consideration of the heavy density flow. Two different approaches were performed at lab scale considering the hydraulic similarity. One is the investigation of a heavy density current of saline water intrusion. The characteristics of the internal hydraulics are monitored using Particle Image Velocimetry (PIV). As a result of the saline intrusion, the internal flow established a continual density stratification of 3-layers in steady state. The other is the movement of activated sludge from a sewage treatment plant. The video image is captured to analyze the behavior of activated sludge in the settling tank. The experiments with various inlet baffle conditions suggest that the hydraulic characteristics of the two experiments are significantly different. As the distance between the baffle and inlet point was decreased, significant strength of saline density currents in the bottom layer was observed. However, the strength of the velocity in the bottom density currents appeared to be the opposite in the case of the activated sludge. The reason for the slower density current in the bottom layer is associated with the compressibility of activated sludge characteristics.
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239
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Smith E, Yoon J, Theodorescu D. Re: Evaluation of Urinary Continence and Voiding Function: Early Results in Men With Neo-Urethral Modification of the Hautmann Orthotopic Neobladder. J Urol 2002. [DOI: 10.1016/s0022-5347(05)65111-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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240
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Yoon J, Rhee MS, Seo DS, Kim BC, Ko Y. Monitoring of Blood Cytokines by PIT-1 Genotypes in Day 150 Male Pigs. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2001. [DOI: 10.5713/ajas.2001.1659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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241
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Choi M, Jung J, Seo M, Lee K, Nam T, Yang I, Yoon Y, Yoon J. Ultrasonographic observation of intestinal mobility of dogs after acupunctural stimulation on acupoints ST-36 and BL-27. J Vet Sci 2001; 2:221-6. [PMID: 12441692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023] Open
Abstract
objectives of this study were to observe normal peristalsis and mixing (or segmental movements) and to evaluate an acupuncture stimulation (ST-36 and BL-27) on the intestinal (duodenum) motility in normal dogs using duplex Doppler sonography. Fifteen healthy Beagle dogs were used for this experiment after the administration of warm saline and pellet feeding. The duodenal motility was examined using duplex Doppler sonography. Six hours after the pellet feeding, an electroacupuncture stimulation at ST-36 and BL-27 was applied and the duodenal motility was examined using duplex Doppler sonography pre-stimulation, during the stimulation and post-stimulation. After saline and pellet administration, the duplex Doppler sonograms showed 3 types of peristalsis and a mixing type (or segmental movement) of duodenum motility. In the peristalsis types, most yielded high-amplitude signals which had one high peak (type-1), two high peaks (type-2), and three high peaks (type-3) and lasted more than 1.3 seconds. Mixing type of duodenum motility had weak signals and were lasted more than 1.5 seconds. Among the peristalsis types, the type 1 and type 2 were predominant and the type 3 was rarely observed. The frequency of intestinal motility stimulated by ST-36 acupoint was increased during the acupuncture stimulation (20% increase compared to the basal value) and decreased (7% decrease compared to the basal value) after stimulation. The frequency of intestinal motility stimulated by BL-27 acupoint was decreased during the acupuncture stimulation (31% decrease compared to the basal value) and increased (18% increase compared to the basal value) after stimulation. There was a significant increase between the value found in during and the post-stimulation tests. We conclude that duplex Doppler studies permit a graphic visualization of intestinal movements which can be qualitatively and quantitatively analyzed using this technique, it is possible to evaluate the gastrointestinal motility after an acupuncture
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Choi M, Kim M, Lee KD, Han KN, Yoon IA, Chung HJ, Yoon J. A new reverse PET chemosensor and its chelatoselective aromatic cadmiation. Org Lett 2001; 3:3455-7. [PMID: 11678681 DOI: 10.1021/ol016400o] [Citation(s) in RCA: 117] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text]. A new fluorescent chemosensor, anthryl tetra acid, was synthesized and showed large fluorescence quenching effects in 100% aqueous solution with metal ions via photoinduced electron transfer (PET). Chelatoselective fluorescence perturbation was observed with Cd(II) and resulted from electrophilic aromatic cadmiation.
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Park H, Seong C, Jang J, Yoon J, Han K, Cho NY, Baek K. Promoter analysis of the Drosophila melanogaster gene encoding the pterin 4alpha-carbinolamine dehydratase. Mol Cells 2001; 12:233-8. [PMID: 11710527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
Pterin-4alpha-carbinolamine dehydratase (PCD) is a key enzyme in the regeneration pathway of tetrahydrobiopterin. Previously, we isolated and reported the Drosophila melanogaster gene encoding PCD. In the present study, we isolated and characterized the Drosophila virilis gene encoding PCD. The Drosophila virilis PCD gene has two introns and an open reading frame to encode a protein of 101 amino acids. The amino acid sequence of Drosophila virilis PCD shows a 83% homology to that of the Drosophila melanogaster PCD protein. From the alignment of the nucleotide sequence in the 5'-flanking region of the Drosophila melanogaster and Drosophila virilis PCD genes, we found four conserved sequences. Using a transient transfection assay, we showed that one of the conserved sequences (-127 to approximately -115) is critical for expression, also the minimal promoter region between -127 and +51 is necessary for the efficient expression of Drosophila melanogaster PCD.
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Kim CH, Lee BJ, Yoon J, Seo KM, Park JH, Lee JW, Cho ES, Hong JJ, Lee YS, Park JH. Therapeutic effect of hyaluronic acid on experimental osteoarthrosis of ovine temporomandibular joint. J Vet Med Sci 2001; 63:1083-9. [PMID: 11714023 DOI: 10.1292/jvms.63.1083] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A symptomatic relief by hyaluronic acid (HA, MW: 3.5 x 10(6)), which is synthesized by Streptococcus spp, was investigated in experimental ovine osteoarthrosis. Bilateral osteoarthrosis (OA) of the temporo-mandibular joints (TMJs) was induced by perforating discs and by scrapping subchondral condylar surface. HA was intra-articularly injected into the left joints of 6 sheep on 7, 10, 14, 17 and 21 days after the operation and physiological saline as the control was injected into the contralateral (right) joints on the same day. Three sheep were killed at I month post-operation (MPO) and the remaining three sheep were killed at 3 MPO. Various responses such as proliferation of fibrous tissue, denudation, erosion, osteophyte formation, subcortical cyst formation and ankylosis were observed radiographically and histopathologically. The treatment of HA ameliorated the degenerative changes and lowered the osteoarthrotic score in the left joints at I MPO (9.96 vs 5.81) and 3 MPO (10.86 vs 5.29) compared to the right joints. These results indicate that a repeated intra-articular injection of HA inhibits the progression of OA in ovine TMJs by inducing the development of articular cartilage and by reducing the proliferation of fibrotic tissue.
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Smith E, Yoon J, Theodorescu D. Evaluation of urinary continence and voiding function: early results in men with neo-urethral modification of the Hautmann orthotopic neobladder. J Urol 2001; 166:1346-9. [PMID: 11547071 DOI: 10.1016/s0022-5347(05)65766-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
PURPOSE At our institution we use the Hautmann orthotopic bladder replacement with a chimney and neo-urethral modification. A neo-urethral tube allows tension-free intestino-urethral anastomosis, thus providing application of this procedure for patients who may otherwise not qualify due to the inability of the small bowel to reach the urethra. However, this neo-urethral tube may also enhance continence by providing significant intra-abdominal urethral length. Conversely, such a modification may be associated with a higher degree of urinary retention. Early evaluation and reporting on the results of this procedure appear warranted. MATERIALS AND METHODS From April 1996 to March 2000, 14 consecutive male patients underwent cystoprostatectomy and urinary reconstruction with Hautmann repair using chimney and neo-urethral modifications. We performed a retrospective analysis of urinary function and continence with data obtained from patient questionnaires completed preoperatively and at each postoperative office visit. The examining physician chart notes were reviewed for information about urinary retention. The American Urological Association symptom score and voiding bother index were used to assess urinary function and bother, respectively. Urinary continence was defined as the complete absence of any form of urinary leakage protection. RESULTS Of the 14 patients 12 were completely continent day and night, with a median followup of 17 months. There were 2 patients who wore pads less than 7 months after surgery. Improvement of urinary continence appeared to continue up to 12 months postoperatively. Despite this encouraging effect, when our data were compared to the published literature, we noted a somewhat increased incidence of patients requiring clean intermittent catheterization to manage significant post-void urinary residuals. We had no patients with urethro-intestinal strictures who required clean intermittent catheterization. CONCLUSIONS The neo-urethral tube modification appears to have a significant and favorable impact on urinary continence while seeming to be associated with a trend towards an increased rate of chronic urinary retention. Longer followup will be required to determine whether this higher rate of chronic urinary retention will remain stable or change with time.
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Choi M, Hwang G, Yoo H, Yoon J, Heo J, Lee K, Chang D. Radiographic diagnosis-situs inversus of abdominal organs in a dog. Vet Radiol Ultrasound 2001; 42:423-5. [PMID: 11686157 DOI: 10.1111/j.1740-8261.2001.tb00963.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Hwang SO, Lee KH, Cho JH, Yoon J, Choe KH. Changes of aortic dimensions as evidence of cardiac pump mechanism during cardiopulmonary resuscitation in humans. Resuscitation 2001; 50:87-93. [PMID: 11719134 DOI: 10.1016/s0300-9572(01)00319-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The mechanism of forward blood flow during cardiopulmonary resuscitation (CPR) remains controversial. We hypothesized that, if the heart acts as a pump, the proximal descending thoracic aorta would be distended during compression by forward blood flow, and would be constricted or remained unchanged if blood flow is generated by increased intrathoracic pressure. Fourteen patients with nontraumatic cardiac arrest underwent transesophageal echocardiography to verify changes in the descending thoracic aorta during standard manual CPR. The aortic dimensions, including cross-sectional area and diameter at the end of compression and relaxation, were measured proximal to, and at the maximal compression site of the descending thoracic aorta. At the maximal compression site, deformation of the descending thoracic aorta was observed during compression in all patients and the ratio of maximal to minimal diameter of the aorta (deformation ratio) decreased during compression compared with relaxation (0.58+/-0.15 vs. 0.81+/-0.11, P=0.001). This suggests eccentric compression of the descending thoracic aorta by external chest compression. The deformation ratio of the descending thoracic aorta proximal to the maximal compression site remained unchanged during compression and relaxation (1.0+/-0.88 vs. 1.0+/-0.9, P=0.345). The cross-sectional area of the descending thoracic aorta proximal to the maximal compression site increased 15% on average during compression compared with relaxation in 12 of 14 patients. In conclusion, deformation of the aorta at the maximal compression site and increase in the cross-sectional area of the proximal aorta suggests that cardiac pumping is the dominant mechanism in generating forward blood flow during CPR in humans.
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Abstract
Painful legs and moving toes syndrome is characterized by spontaneous causalgic pain in the lower extremities associated with peculiar involuntary movements of the lower extremities, especially the toes and feet. The pain is diffuse, intractable, aching, and deep. The movements consist of persistent writhing movements in the digits that cannot be limited voluntarily. The syndrome has been observed after a variety of abnormalities affecting the posterior nerve roots, the spinal ganglia, and the peripheral nerves. This article reviews commonly reported findings and current concepts in the etiology and management of this condition.
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Politzer RM, Yoon J, Shi L, Hughes RG, Regan J, Gaston MH. Inequality in America: the contribution of health centers in reducing and eliminating disparities in access to care. Med Care Res Rev 2001; 58:234-48. [PMID: 11398647 DOI: 10.1177/107755870105800205] [Citation(s) in RCA: 144] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Reducing and eliminating health status disparities by providing access to appropriate health care is a goal of the nation's health care delivery system. This article reviews the literature that demonstrates a relationship between access to appropriate health care and reductions in health status disparities. Using comprehensive site-level data, patient surveys, and medical record reviews, the authors present an evaluation of the ability of health centers to provide such access. Access to a regular and usual source of care alone can mitigate health status disparities. The safety net health center network has reduced racial/ethnic, income, and insurance status disparities in access to primary care and important preventive screening procedures. In addition, the network has reduced low birth weight disparities for African American infants. Evidence suggests that health centers are successful in reducing and eliminating health access disparities by establishing themselves as their patients' usual and regular source of care. This relationship portends well for reducing and eliminating health status disparities.
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Oh Y, Lee S, Yoon J, Han K, Baek K. Promoter analysis of the Drosophila melanogaster gene encoding transcription elongation factor TFIIS. BIOCHIMICA ET BIOPHYSICA ACTA 2001; 1518:276-81. [PMID: 11311940 DOI: 10.1016/s0167-4781(01)00203-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The promoter region of the Drosophila melanogaster TFIIS gene was characterized by transient expression assay. Serial deletion analysis of the promoter region showed that the promoter region between -112 and +113 is required for the efficient expression of the D. melanogaster TFIIS gene. The results also suggest that the DNA fragments between -112 and -54 and between +94 and +113 contain the vital elements for the expression. The importance of these fragments was further substantiated by the findings that the sequences in these fragments of the D. melanogaster TFIIS gene are conserved in the 5'-flanking regions of the Drosophila virilis TFIIS gene. The comparison of the nucleotide sequences in the 5'-flanking region of the D. melanogaster and D. virilis TFIIS genes revealed that the three regions, -85--59, +76-+126, and the vicinity of the transcription initiation site of the D. melanogaster TFIIS gene, are conserved. It is very interesting that the long downstream DNA between +76 and +126 is highly conserved with 90% identities between the two species. The downstream promoter region between +94 and +113 of the D. melanogaster TFIIS gene was further analyzed by transient expression and band mobility shift assays. The results obtained suggest that the region between +94 and +113 is probably recognized by nuclear factors and that the sequence (+98)AGTAAACAACAT(+109) seems to make a great contribution to promoter activity of the D. melanogaster TFIIS gene.
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