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Moon BH, Chaoumead A, Sung YM. Fundamental electrochemiluminescence characteristics of fluorine-doped tin oxides synthesized by sol-gel combustion. J Nanosci Nanotechnol 2013; 13:7188-7190. [PMID: 24245225 DOI: 10.1166/jnn.2013.7912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Fluorine-doped tin oxide (FTO) materials synthesized by sol-gel combustion method were investigated for electrochemical luminescence (ECL) application. Effects of sol-gel combustion conditions on the structures and morphology of the porous FTO (p-FTO) materials were studied. ECL efficiency of p-FTO-based cell was about 251 cd/m2 at 4 V bias, which is higher than the sell using only FTO electrodes (102.8 cd/m2). The highest intensity of the emitting light was obtained at the wavelength of about 610 nm. The porous FTO layer was effective for increasing ECL intensities.
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Affiliation(s)
- B H Moon
- Electrical Engineering, Kyungsung University, Busan 608-736, Korea
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Cho SH, Sung YM, Kim MS. Missed rib fractures on evaluation of initial chest CT for trauma patients: pattern analysis and diagnostic value of coronal multiplanar reconstruction images with multidetector row CT. Br J Radiol 2012; 85:e845-50. [PMID: 22514102 DOI: 10.1259/bjr/28575455] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE The objective of this study was to review the prevalence and radiological features of rib fractures missed on initial chest CT evaluation, and to examine the diagnostic value of additional coronal images in a large series of trauma patients. METHODS 130 patients who presented to an emergency room for blunt chest trauma underwent multidetector row CT of the thorax within the first hour during their stay, and had follow-up CT or bone scans as diagnostic gold standards. Images were evaluated on two separate occasions: once with axial images and once with both axial and coronal images. The detection rates of missed rib fractures were compared between readings using a non-parametric method of clustered data. In the cases of missed rib fractures, the shapes, locations and associated fractures were evaluated. RESULTS 58 rib fractures were missed with axial images only and 52 were missed with both axial and coronal images (p=0.088). The most common shape of missed rib fractures was buckled (56.9%), and the anterior arc (55.2%) was most commonly involved. 21 (36.2%) missed rib fractures had combined fractures on the same ribs, and 38 (65.5%) were accompanied by fracture on neighbouring ribs. CONCLUSION Missed rib fractures are not uncommon, and radiologists should be familiar with buckle fractures, which are frequently missed. Additional coronal imagescan be helpful in the diagnosis of rib fractures that are not seen on axial images.
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Affiliation(s)
- S H Cho
- Department of Radiology, Gil Hospital, Gachon University of Medicine and Science, Incheon, Republic of Korea
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Abstract
We previously showed that the EP2 knockout mice were resistant to chemically induced skin carcinogenesis. The purpose of this study was to investigate the role of the overexpression of the EP2 receptor in mouse skin carcinogenesis. To determine the effect of overexpression of EP2, we used EP2 transgenic (TG) mice and wild-type (WT) mice in a DMBA (7,12-dimethylbenz[alpha]anthracene)/TPA (12-O-tetradecanoylphorbol-13-acetate) two-stage carcinogenesis protocol. EP2 TG mice developed significantly more tumors compared with WT mice. Overexpression of the EP2 receptor increased TPA-induced keratinocyte proliferation both in vivo and in vitro. In addition, the epidermis of EP2 TG mice 48 h after topical TPA treatment was significantly thicker compared to that of WT mice. EP2 TG mice showed significantly increased cyclic adenosine monophosphate levels in the epidermis after prostaglandin E2 (PGE2) treatment. The inflammatory response to TPA was increased in EP2 TG mice, as demonstrated by an increased number of macrophages in the dermis. Tumors and 7 x TPA-treated and DMBA-TPA-treated (6 weeks) skins from EP2 TG mice produced more blood vessels than those of WT mice as determined by CD-31 immunostaining. Vascular endothelial growth factor (VEGF) protein expression was significantly increased in squamous cell carcinoma (SCC) samples from EP2 TG mice compared that of WT mice. There was, however, no difference in the number of apoptotic cells in tumors from WT and EP2 TG mice. Together, our results suggest that the overexpression of the EP2 receptor plays a significant role in the protumorigenic action of PGE2 in mouse skin.
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MESH Headings
- Animals
- Animals, Newborn
- Bromodeoxyuridine/metabolism
- Carcinoma, Squamous Cell/blood supply
- Carcinoma, Squamous Cell/metabolism
- Carcinoma, Squamous Cell/pathology
- Cattle
- Cell Culture Techniques
- Cell Proliferation/drug effects
- Female
- Humans
- Hyperplasia
- Inflammation/chemically induced
- Keratinocytes/metabolism
- Keratins/genetics
- Mice
- Mice, Transgenic
- Neovascularization, Pathologic/genetics
- Polymerase Chain Reaction
- Receptors, Prostaglandin E/genetics
- Receptors, Prostaglandin E/metabolism
- Receptors, Prostaglandin E, EP2 Subtype
- Skin Neoplasms/blood supply
- Skin Neoplasms/metabolism
- Skin Neoplasms/pathology
- Tetradecanoylphorbol Acetate/pharmacology
- Up-Regulation
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Affiliation(s)
- Y M Sung
- Science Park-Research Division, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA
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Chan KCA, Tang NLS, Hui DSC, Chung GTY, Wu AKL, Chim SSC, Chiu RWK, Lee N, Choi KW, Sung YM, Chan PKS, Tong YK, Lai ST, Yu WC, Tsang O, Lo YMD. Absence of association between angiotensin converting enzyme polymorphism and development of adult respiratory distress syndrome in patients with severe acute respiratory syndrome: a case control study. BMC Infect Dis 2005; 5:26. [PMID: 15819995 PMCID: PMC1090578 DOI: 10.1186/1471-2334-5-26] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2005] [Accepted: 04/09/2005] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND It has been postulated that genetic predisposition may influence the susceptibility to SARS-coronavirus infection and disease outcomes. A recent study has suggested that the deletion allele (D allele) of the angiotensin converting enzyme (ACE) gene is associated with hypoxemia in SARS patients. Moreover, the ACE D allele has been shown to be more prevalent in patients suffering from adult respiratory distress syndrome (ARDS) in a previous study. Thus, we have investigated the association between ACE insertion/deletion (I/D) polymorphism and the progression to ARDS or requirement of intensive care in SARS patients. METHOD One hundred and forty genetically unrelated Chinese SARS patients and 326 healthy volunteers were recruited. The ACE I/D genotypes were determined by polymerase chain reaction and agarose gel electrophoresis. RESULTS There is no significant difference in the genotypic distributions and the allelic frequencies of the ACE I/D polymorphism between the SARS patients and the healthy control subjects. Moreover, there is also no evidence that ACE I/D polymorphism is associated with the progression to ARDS or the requirement of intensive care in the SARS patients. In multivariate logistic analysis, age is the only factor associated with the development of ARDS while age and male sex are independent factors associated with the requirement of intensive care. CONCLUSION The ACE I/D polymorphism is not directly related to increased susceptibility to SARS-coronavirus infection and is not associated with poor outcomes after SARS-coronavirus infection.
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Affiliation(s)
- KC Allen Chan
- The Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
- Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
| | - Nelson LS Tang
- The Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
- Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
| | - David SC Hui
- The Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
| | - Grace TY Chung
- The Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
- Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
| | - Alan KL Wu
- The Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
| | - Stephen SC Chim
- The Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
- Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
| | - Rossa WK Chiu
- The Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
- Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
| | - Nelson Lee
- The Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
| | - KW Choi
- The Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
| | - YM Sung
- Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
| | - Paul KS Chan
- The Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
- Department of Microbiology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
| | - YK Tong
- The Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
- Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
| | - ST Lai
- Department of Medicine and Geriatrics, Princess Margaret Hospital, Hong Kong
| | - WC Yu
- Department of Medicine and Geriatrics, Princess Margaret Hospital, Hong Kong
| | - Owen Tsang
- Department of Medicine and Geriatrics, Princess Margaret Hospital, Hong Kong
| | - YM Dennis Lo
- The Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
- Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong
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Tang NLS, Hui J, Yong CKK, Wong LTK, Applegarth DA, Vallance HD, Law LK, Fung SLM, Mak TWL, Sung YM, Cheung KL, Fok TF. A genomic approach to mutation analysis of holocarboxylase synthetase gene in three Chinese patients with late-onset holocarboxylase synthetase deficiency. Clin Biochem 2003; 36:145-9. [PMID: 12633764 DOI: 10.1016/s0009-9120(02)00432-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Multiple carboxylase deficiency (MCD, MIM:253270) is a common organic aciduria and caused by deficiency of either biotinidase or holocarboxylase synthetase (HLCS; EC 6.3.4.10). Patients commonly present during early infancy with acute metabolic derangements and severe metabolic acidosis. Recently, a late onset form of HLCS deficiency was also described. The different phenotypes (early and late presenting) may be related to a spectrum of mutations in HLCS gene. Applications of mutation analysis in HLCS had been limited previously by the requirement of cDNA from living tissue for study. We described here a genomic approach for molecular diagnosis of HLCS deficiency which we have used to detect mutations in Chinese patients who had the late-onset form of HLCS deficiency. In addition, a fibroblast cell line with MCD from Coriell Cell repositories was also studied. DESIGN AND METHODS Three Chinese patients with late onset HLCS deficiency were studied. The genomic sequence of HLCS was retrieved and newly designed primers were used to cover all coding sequences of the gene. PCR products were analyzed by direct sequencing. Population allelic frequencies of mutations detected were determined by genotyping of control samples by restriction fragment length polymorphism. RESULTS We found a recurrent mutation, R508W, in the three unrelated Chinese patients. Two were homozygous for this mutation. The other patient was a compound heterozygote of R508W and a novel mutation, D634N. The results suggest that R508W may be an important and relatively prevalent disease-causing mutation in Chinese MCD patients. A fibroblast cell-line from an African patient revealed an additional novel mutation, R565X and a known mutation, V550M. CONCLUSION R508W is a recurrent mutation in Chinese MCD patients which is associated with the late onset phenotype. This new genomic approach for mutation analysis of HLCS gene provides new opportunities in studies of MCD.
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Affiliation(s)
- Nelson L S Tang
- Department of Chemical Pathology, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong.
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Abstract
To identify proteins that interact with Huntingtin-interacting protein-2 (Hip-2), a ubiquitin-conjugating enzyme, a yeast two-hybrid screen system was used to isolate five positive clones. Sequence analyses showed that, with one exception, all Hip-2-interacting proteins contained the RING finger motifs. The interaction of Hip-2 with RNF2, one of the clones, was further confirmed through in vitro and in vivo experiments. Mutations in the RING domain of RNF2 prevented the clone from binding to Hip-2, an indication that the RING domain is the binding determinant. RNF2 showed a ubiquitin ligase (E3) activity in the presence of Hip-2, suggesting that a subset of RING finger proteins may have roles as E3s.
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Affiliation(s)
- S J Lee
- Graduate School of Biotechnology, Korea University, Seoul, South Korea
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