201
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Choi JY, Choi JH, Kim NK, Kim Y, Lee JK, Kim MK, Lee JH, Kim MJ. Analysis of errors in medical rapid prototyping models. Int J Oral Maxillofac Surg 2002; 31:23-32. [PMID: 11936396 DOI: 10.1054/ijom.2000.0135] [Citation(s) in RCA: 216] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Rapid prototyping (RP) is a relatively new technology that produces physical models by selectively solidifying UV-sensitive liquid resin using a laser beam. The technology has gained a great amount of attention, particularly in oral and maxillofacial surgery. An important issue in RP applications in this field is how to obtain RP models of the required accuracy. We investigated errors generated during the production of medical RP models, and identified the factors that caused dimensional errors in each production phase. The errors were mainly due to the volume-averaging effect, threshold value, and difficulty in the exact replication of landmark locations. We made 16 linear measurements on a dry skull, a replicated three-dimensional (3-D) visual (STL) model, and an RP model. The results showed that the absolute mean deviation between the original dry skull and the RP model over the 16 linear measurements was 0.62 +/- 0.35 mm (0.56 +/- 0.39%), which is smaller than values reported in previous studies. A major emphasis is placed on the dumb-bell effect. Classifying measurements as internal and external measurements, we observed that the effect of an inadequate threshold value differs with the type of measurement.
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202
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Abstract
Ectopic thyroid is an uncommon embryological aberration characterized by the presence of thyroid tissue in a site other than in its usual pre-tracheal region. It occurs along the path of descent of the developing thyroid primodium from the foramen cecum. It most commonly presents itself as a lingual thyroid and is the only thyroid in 70% of all cases. It is extremely rare for two ectopic foci of thyroid tissue to be present simultaneously. The authors report a recent case of dual ectopic thyroid present in the lingual and infrahyoid areas with no thyroid tissue in the pre-tracheal area in a 15-year-old girl. The patient had originally been scheduled for surgery under the impression of thyroglossal duct cyst; however, a pre-operative computed tomography scan of neck and thyroid scans revealed the presence of dual ectopic thyroid, thus preventing unnecessary surgery. Therefore, thyroid scan, along with either neck CT or neck ultrasonogram, should be performed routinely to avoid unnecessary surgery if the clinical picture is at all compatible with thyroid ectopia.
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Abstract
Suppurative bronchopneumonia was discovered in a 6-yr-old male jaguar (Panthera onca onca) that died after a 1 wk history of anorexia, depression, and respiratory difficulty. Morganella morganii was isolated as a pure culture from the lung, spleen, and heart blood. This is the first record of M. morganii induced pneumonia in a jaguar.
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204
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Jung MJ, Choi JH, Chung HY, Jung JH, Choi JS. A new C-methylated flavonoid glycoside from Pinus densiflora. Fitoterapia 2001; 72:943-5. [PMID: 11731124 DOI: 10.1016/s0367-326x(01)00337-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new C-methyl flavonol glycoside, 5,7,8,4'-tetrahydroxy-3-methoxy-6-methylflavone 8-O-beta-D-glucopyranoside (1), has been isolated from the needles of Pinus densiflora, together with kaempferol 3-O-beta-(6"-acetyl)-galactopyranoside.
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205
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Kwon OS, Lee HS, Koh DW, Cho YJ, Park YH, Park DK, Oh YL, Seo JH, Chun HJ, Um SH, Lee SW, Choi JH, Kim CD, Ryu HS, Hyun JH, Kim AR, Kim YS. A case of primary adenosquamous carcinoma of the liver presented with liver abscess. Korean J Intern Med 2001; 16:270-3. [PMID: 11855159 PMCID: PMC4578056 DOI: 10.3904/kjim.2001.16.4.270] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Primary adenosquamous carcinoma of the liver is a very rare type of cholangiocarcinoma and is defined as a cancer containing both squamous and adenomatous components in the same lesion. Recently, we experienced a primary adenosquamous carcinoma of the liver presented as liver abscess. A 63-year-old man was presented with a 4-day history of fever and chill. The radiologic study showed a 4 cm-sized, central hypoattenuated mass with peripheral rim enhancement in the left lobe of the liver. Ultrasonography-guided aspiration and biopsy suggested an adenocarcinoma with abscess in the liver. At laparotomy, the tumor occupied the left lobe of the liver and invaded the right diaphragm. An extended left lobectomy and a partial excision of the involved diaphragm were done. Grossly, the tumor was 6 x 5 x 5 cm in size and had an eccentric necrosis. Microscopically, the tumor was composed of adenocarcinoma and squamous cell carcinoma with a transitional area.
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206
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Choi JH, Kwon HJ, Yoon BI, Kim JH, Han SU, Joo HJ, Kim DY. Expression profile of histone deacetylase 1 in gastric cancer tissues. Jpn J Cancer Res 2001; 92:1300-4. [PMID: 11749695 PMCID: PMC5926683 DOI: 10.1111/j.1349-7006.2001.tb02153.x] [Citation(s) in RCA: 259] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Although histone deacetylases (HDACs) appear to play a crucial role in carcinogenesis, the expression status of HDACs in primary human cancer tissues has not yet been reported. In this study, we investigated the expression level of HDAC1 in 25 paired primary human gastric cancer (GC) tissues and corresponding normal tissues through semi-quantitative RT-PCR and immunoblot analysis. The HDAC1 expression pattern was also topologically examined through immunohistochemistry. Overexpression of HDAC1 mRNA was detected in 68% of GC tissues (17 of 25), and the relative density of HDAC1 mRNA in GC tissue was increased 1.8-fold versus the normal counterpart (P < 0.01). Elevated expression of HDAC1 protein was also detected in 61% of GC samples (11 of 18), which also showed an increased mRNA level of HDAC. Immunohistochemically, overexpression of HDAC1 was predominantly localized in the nuclei of most neoplastic cells, including embolic tumor cells, whereas normal glandular epithelial cells revealed only weak HDAC1 expression that was focal in distribution. Thus, the present study clearly demonstrates that HDAC1 is overexpressed in GC and probably plays a significant role in gastric carcinogenesis.
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207
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Choi BK, Kim KY, Yoo YJ, Oh SJ, Choi JH, Kim CY. In vitro antimicrobial activity of a chitooligosaccharide mixture against Actinobacillus actinomycetemcomitans and Streptococcus mutans. Int J Antimicrob Agents 2001; 18:553-7. [PMID: 11738343 DOI: 10.1016/s0924-8579(01)00434-4] [Citation(s) in RCA: 243] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The purpose of this study was to evaluate the in vitro antibacterial activity of a chitooligosaccharide mixture (MW 2000-30000 Da) with a deacetylation degree of 91.5% against two representative oral pathogens, Actinobacillus actinomycetemcomitans and Streptococcus mutans. A 0.1% concentration of the chitooligosaccharides (derived from the exoskeletons of marine crustaceans) was used to estimate antibacterial activity. Approximately 2 logcolony forming units (CFU)/ml of A. actinomycetemcomitans were inactivated by 0.1% chitosan after 30 min, while 120 min exposure inactivated about 4.5 logCFU/ml of this organism. In contrast, the level of inactivation against S. mutans was less than 0.5 logCFU/ml after an exposure of up to 120 min. Electron microscopy showed that the exposure of A. actinomycetemcomitans to the chitooligosaccharides resulted in the disruption of cell membranes and that it could be considered for the treatment of periodontal diseases associated with A. actinomycetemcomitans.
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208
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Lee SY, Chang SE, Bae GY, Choi JH, Sung KJ, Moon KC, Koh JK. Carcinoma erysipeloides associated with anaplastic thyroid carcinoma. Clin Exp Dermatol 2001; 26:671-3. [PMID: 11722453 DOI: 10.1046/j.1365-2230.2001.00915.x] [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: 11/20/2022]
Abstract
Cutaneous metastases from carcinoma of the thyroid gland are rare and carcinoma erysipeloides is even rarer. We present the clinical, histological, and immunohistochemical features of inflammatory erysipeloid metastases arising from an anaplastic carcinoma of the thyroid gland. In this case the anaplastic carcinoma probably transformed from a pre-existing, long-standing papillary carcinoma of the thyroid gland. Although visible inflammation is a hallmark of many benign skin disorders, it is not commonly present in cutaneous malignant metastases. As a result, the significance of a marked inflammatory changes in association with metastatic skin disease may not be recognized. Dermatologists need to be aware of the potential for inflammatory manifestations in cutaneous metastases from a thyroid carcinoma.
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209
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Choi JH, Yoon BI, Kim JH, Shin NS, Kwon SW, Lee KW, Kim DY. Mammary gland adenocarcinoma in a mandrill (Mandrillus sphinix). J Vet Med Sci 2001; 63:1233-5. [PMID: 11767060 DOI: 10.1292/jvms.63.1233] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A 22-year-old female mandrill (Mandrillus sphinix) with continuously growing mass at the right mammary gland area was found dead, and a postmortem examination was performed. At necropsy, an elevated firm subcutaneous mass about 5 cm in diameter was present at the right mammary gland area. Axillary, mediastinal, and tracheobronchial lymph nodes were enlarged 2 to 4 times their normal sizes. Numerous metastatic foci 2 to 5 mm in diameter were scattered in the lung. Histologically, the tumor was diagnosed as mammary gland adenocarcinoma. Metastasis to the regional lymph nodes and lung was also confirmed. This is the first reported case of a mammary gland tumor in mandrill in Asia.
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210
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Oh GT, Choi JH, Hong JJ, Kim DY, Lee SB, Kim JR, Lee CH, Hyun BH, Oh SR, Bok SH, Jeong TS. Dietary hematein ameliorates fatty streak lesions in the rabbit by the possible mechanism of reducing VCAM-1 and MCP-1 expression. Atherosclerosis 2001; 159:17-26. [PMID: 11689202 DOI: 10.1016/s0021-9150(01)00464-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Hematein is a compound isolated from Caesalpinia sappan that has been used in oriental medicine as both an analgesic and an anti-inflammatory agent. In this study, we examined the anti-atherogenic potential of hematein using cholesterol-fed New Zealand White (NZW) rabbits. NZW rabbits were divided into a hematein-supplemented (0.05% in diet) group (n=6), a probucol-supplemented (0.25% in diet) group (n=6), and a control group (n=6). After 8 weeks of treatments, the extent of the atherosclerotic lesions was significantly reduced in the hematein-supplemented group and the probucol-supplemented group without changing plasma lipoprotein levels. Hematein and probucol prevented the up-regulation of the vascular cell adhesion molecule-1 (VCAM-1) expression on the descending aorta induced by cholesterol diet. In culture, hematein also significantly inhibited the secretion of soluble VCAM-1 and of monocyte chemotactic protein-1 (MCP-1) respectively induced by tumor necrotic factor alpha (TNF-alpha) and mildly oxidized low density lipoprotein in human umbilical vein endothelial cell (HUVEC) culture. Also, hematein inhibited monocyte adhesion to endothelial cell and the activation of NF-kappaB in HUVECs stimulated with TNF-alpha. The results of the present study suggest that the anti-atherogenic effect of hematein is not related to control of the plasma lipid profile but probably related to the inhibition of VCAM-1 and MCP-1 expression resulting in an amelioration of lesion development in the rabbit.
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MESH Headings
- Animals
- Anticholesteremic Agents/pharmacology
- Aorta, Thoracic/metabolism
- Aorta, Thoracic/pathology
- Arteriosclerosis/metabolism
- Arteriosclerosis/pathology
- Blotting, Northern
- Caesalpinia
- Cell Adhesion/drug effects
- Cell Line
- Cells, Cultured
- Chemokine CCL2/biosynthesis
- Drugs, Chinese Herbal/administration & dosage
- Drugs, Chinese Herbal/pharmacology
- Electrophoretic Mobility Shift Assay
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/metabolism
- Endothelium, Vascular/pathology
- Hematoxylin/administration & dosage
- Hematoxylin/analogs & derivatives
- Hematoxylin/pharmacology
- Lipids/blood
- Lipoproteins, LDL/blood
- Male
- Monocytes/drug effects
- Monocytes/pathology
- NF-kappa B/metabolism
- Oxidation-Reduction
- Plant Extracts/administration & dosage
- Plant Extracts/pharmacology
- Polymerase Chain Reaction
- Probucol/pharmacology
- Rabbits
- Transcriptional Activation/drug effects
- Tumor Necrosis Factor-alpha/pharmacology
- Vascular Cell Adhesion Molecule-1/biosynthesis
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211
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Lee WH, Lee H, Kim JA, Choi JH, Cho M, Jeon SJ, Cho BR. Two-photon absorption and nonlinear optical properties of octupolar molecules. J Am Chem Soc 2001; 123:10658-67. [PMID: 11673997 DOI: 10.1021/ja004226d] [Citation(s) in RCA: 178] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Two-photon absorption (TPA) cross sections of four representative series of octupolar molecules are theoretically investigated. The general structure--TPA-property relationship is described by using the effective four-state valence-bond three-charge-transfer model. As the charge-transfer character of the ground electronic state increases due to the strong donors or acceptors, (i) the transition dipole matrix elements between the ground and 2-fold degenerate excited states increase, (ii) the energy gap decreases, and consequently (iii) the TPA transition amplitude monotonically increases. Thus, the design strategy to maximize the TPA cross section of the octupolar molecule is established. On the basis of the four-state model, the first hyperpolarizability of the octupolar molecule is found to be linearly proportional to the TPA cross section. This theoretical relationship is confirmed by using the ab initio calculation results. The Hammett correlation analysis of the TPA cross section and first hyperpolarizability is also presented.
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212
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Cho BR, Son KH, Lee SH, Song YS, Lee YK, Jeon SJ, Choi JH, Lee H, Cho M. Two photon absorption properties of 1,3,5-tricyano-2,4,6-tris(styryl)benzene derivatives. J Am Chem Soc 2001; 123:10039-45. [PMID: 11592882 DOI: 10.1021/ja010770q] [Citation(s) in RCA: 186] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two-photon absorption (TPA) properties of 1,3,5-tricyano-2,4,6-tris(styryl)benzene derivatives have been investigated. Comparison of the absorption and fluorescence spectra reveals that these compounds show large Stokes shifts, which increase gradually as the conjugation length increases. One-photon absorption and excitation spectra are similar except that the latter exhibit several peaks near lambda(max). It is also found that the one- and two-photon-induced fluorescence excitation spectra are quite similar, which indicates that the one- and two-photon allowed-excited states are the same. The peak TPA cross section values (delta(max)) measured with nanosecond pulses by the two-photon-induced fluorescence method are in the range (50-2620) x 10(-50) cm4 s/photon. The delta(max) value increases as the donor strength and conjugation length increase. A linear relationship is observed between delta(max) and beta, and this delta-beta relationship is found to serve as a useful synthetic strategy for the design of novel TPA dyes with the octupolar structure.
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213
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Toronov V, Webb A, Choi JH, Wolf M, Safonova L, Wolf U, Gratton E. Study of local cerebral hemodynamics by frequency-domain near-infrared spectroscopy and correlation with simultaneously acquired functional magnetic resonance imaging. OPTICS EXPRESS 2001; 9:417-27. [PMID: 19424359 DOI: 10.1364/oe.9.000417] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The aim of our study was to explore the possibility of detecting hemodynamic changes in the brain using the phase of the intensity modulated optical signal. To obtain optical signals with the highest possible signal-to-noise ratio, we performed a series of simultaneous NIRS-fMRI measurements, with subsequent correlation of the time courses of both measurements. The cognitive paradigm used arithmetic calculations, with optical signals acquired with sensors placed on the forehead. Measurements were done on seven healthy subjects. In five subjects we demonstrated correlation between the hemodynamic signals obtained using NIRS and BOLD fMRI. In four subjects correlation was found for the hemodynamic signal obtained using the phase of the intensity modulated signal.
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214
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Kim P, Yoon SH, Seo MJ, Oh DK, Choi JH. Improvement of tagatose conversion rate by genetic evolution of thermostable galactose isomerase. Biotechnol Appl Biochem 2001; 34:99-102. [PMID: 11592915 DOI: 10.1042/ba20010025] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
To enhance the isomerization rate of galactose into tagatose, a thermostable galactose isomerase, which was isolated from bacteria growing in a hot spring, was genetically improved using the error-prone PCR method. From 500 mutant clones, a clone showing improved conversion activity was selected. The sequence of the selected clone had five amino acid changes: His(228)-->Asp, Gly(384)-->Asp, Ser(393)-->Thr, Lys(428)-->Asn and Asp(475)-->Lys. The improved galactose isomerase had an 11-fold higher reaction rate than the original.
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215
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Lee KT, Sohn IC, Kim YK, Choi JH, Choi JW, Park HJ, Itoh Y, Miyamoto K. Tectorigenin, an isoflavone of Pueraria thunbergiana Benth., induces differentiation and apoptosis in human promyelocytic leukemia HL-60 cells. Biol Pharm Bull 2001; 24:1117-21. [PMID: 11642314 DOI: 10.1248/bpb.24.1117] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cytotoxic effects of six isoflavonoids, tectorigenin, glycitein, tectoridin, glycitin, 6''-O-xylosyltectoridin, and 6''-O-xylosylglycitin isolated from the flower of Pueraria thunbergiana Benth. together with genistein, a known differentiation and apoptosis inducer, were examined. Among these isoflavonoids, tectorigenin and genistein exhibited cytotoxicity against various human cancer cells; glycitein showed only mild cytotoxicity. These results suggest that the isoflavone structure and 5-hydroxyl group are crucial for the cytotoxic properties and that glycosides are inactive. Moreover, tectorigenin induced differentiation of human promyelocytic leukemia HL-60 cells to granulocytes and monocytes/macrophages, and caused apoptotic changes of DNA in the cells, as did genistein. Tectorigenin also inhibited autophosphorylation of epidermal growth factor (EGF) receptor by EGF and decreased the expression of Bcl-2 protein, with less activity than genistein. From these results, tectorigenin may be a possible therapeutic agent for leukemia.
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216
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Chang SE, Choi JH, Sung KJ, Moon KC, Koh JK. Cutaneous nasal-type CD56+ natural killer/T-cell lymphoma preceded by Epstein-Barr virus antigenaemia. Br J Dermatol 2001; 145:668-9. [PMID: 11703301 DOI: 10.1046/j.1365-2133.2001.04425.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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217
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Jang KA, Choi JC, Choi JH. Expression of cutaneous lymphocyte-associated antigen and TIA-1 by lymphocytes in pityriasis lichenoides et varioliformis acuta and lymphomatoid papulosis: immunohistochemical study. J Cutan Pathol 2001; 28:453-9. [PMID: 11553311 DOI: 10.1034/j.1600-0560.2001.028009453.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND Pityriasis lichenoides et varioliformis acuta (PLEVA) and lymphomatoid papulosis (LyP) are benign self-healing cutaneous eruptions that may be clinically and histologically similar. The purposes of this study were to evaluate immunohistological characteristics of PLEVA and LyP and to investigate whether Epstein-Barr virus (EBV) may be present in PLEVA and LyP. METHODS We performed an immunohistochemical staining in 12 cases of PLEVA and 8 cases of LyP using nine antibodies for CD3, CD4, CD8, CD30, CD45RO, CD56, CD79, cutaneous lymphocyte-associated antigen (CLA), and TIA-1. In situ hybridization was performed using fluorescein-conjugated oligonucleotide probes for EBV early regions (EBER). RESULTS In PLEVA, immunohistochemical studies revealed that infiltrated lymphocytes consisted of mainly CD3-positive (5+), CD8-positive (4+ to 5+), CLA-positive (4+ to 5+) T cells and partly CD79 positive (+ to 2+) B cells. CD4-positive T cells were less than 25%. In LyP, immunohistochemical studies revealed that infiltrated lymphocytes consisted of partly CD3-positive (5+), CD8-positive (2+ to 3+), CLA-positive (3+ to 4+) T cells and partly CD79-positive (2+ to 3+) B cells. CD4-positive T cells were less than 10%. CD8 and CLA were more strongly expressed in PLEVA than in LyP. CD30 was strongly expressed in LyP but not expressed in PLEVA. CD79 was more expressed in LyP than in PLEVA. TIA-1 was not expressed in any cases. In situ hybridization using antisense EBER probe showed negative reaction in all cases. CONCLUSIONS Immunohistochemical stains for CD8, CD30, CD79 and CLA may be valuable tools in the differential diagnosis between PLEVA and LyP. TIA-1 was negative in LyP, which means cytotoxic cells may not be implicated in the pathogenesis of LyP. It was a contradictory result to the previous results. The absence of EBV in PLEVA and LyP suggests that this virus may not be operative in the pathogenesis of these diseases. These results suggest that LyP and PLEVA are separate disorders, thus accounting for their variable prognosis.
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218
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Park MS, Park SW, Choi JH. Distortion product otoacoustic emissions in diabetics with normal hearing. SCANDINAVIAN AUDIOLOGY. SUPPLEMENTUM 2001:148-51. [PMID: 11318450 DOI: 10.1080/010503901300007362] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
In 18 diabetic patients with normal hearing, distortion product otoacoustic emissions (DPOAEs) were measured. DPOAEs' amplitude and latency were analysed and compared with the data obtained from non-diabetic controls. The mean amplitude and latency were lower in diabetics than in controls. These results suggested that diabetes mellitus may induce the functional alteration of outer hair cells even in the normal hearing group. Further studies should be performed to evaluate the predictability of DPOAEs in hearing loss of the diabetic patient.
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219
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Kim KJ, Lee MW, Choi JH, Sung KJ, Moon KC, Koh JK. A case of congenital tufted angioma mimicking cavernous hemangioma. J Dermatol 2001; 28:514-5. [PMID: 11603396 DOI: 10.1111/j.1346-8138.2001.tb00023.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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220
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Cho S, Chang SE, Kim KR, Choi JH, Sung KJ, Moon KC, Koh JK. Waldenström's macroglobulinaemia presenting as reticulate purpura and bullae in a patient with hepatitis B virus infection. Clin Exp Dermatol 2001; 26:513-7. [PMID: 11678879 DOI: 10.1046/j.1365-2230.2001.00880.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Cutaneous manifestations of Waldenström's macroglobulinaemia (WM) include purpura, ulcers, urticaria, leukocytoclastic vasculitis, and immunobullous dermatoses. No association has been reported previously of WM and hepatitis B virus (HBV) infection. A 40-year-old female HBV carrier was admitted to hospital because of generalized oedema, oliguria, haematuria, hypertension, fever and blood-tinged sputum. Cutaneous manifestations included generalized petechiae, palpable purpura mainly on the legs, multiple necrotic ulcerations and gangrenous changes on the toes, and necrotic, giant confluent reticulate purpura on the trunk surmounted by several tense bullae. Laboratory investigations revealed monoclonal gammopathy of IgM kappa type (6.7 g/L), membranoproliferative glomerulonephritis associated with HBV infection, Bence Jones proteinuria, and an increased number of abnormal plasmacytoid cells in the bone marrow. Pathologic examination demonstrated immune complex-mediated vasculitis with deposits of IgM in the walls of dermal vessels and secondary subepidermal bulla formation. HBV infection may have caused WM or modified the clinical course in this fatal case.
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221
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Zhang XS, Choi JH. Molecular evolution of calmodulin-like domain protein kinases (CDPKs) in plants and protists. J Mol Evol 2001; 53:214-24. [PMID: 11523008 DOI: 10.1007/s002390010211] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2000] [Accepted: 04/18/2001] [Indexed: 10/28/2022]
Abstract
Many genes for calmodulin-like domain protein kinases (CDPKs) have been identified in plants and Alveolate protists. To study the molecular evolution of the CDPK gene family, we performed a phylogenetic analysis of CDPK genomic sequences. Analysis of introns supports the phylogenetic analysis; CDPK genes with similar intron/exon structure are grouped together on the phylogenetic tree. Conserved introns support a monophyletic origin for plant CDPKs, CDPK-related kinases, and phosphoenolpyruvate carboxylase kinases. Plant CDPKs divide into two major branches. Plant CDPK genes on one branch share common intron positions with protist CDPK genes. The introns shared between protist and plant CDPKs presumably originated before the divergence of plants from Alveolates. Additionally, the calmodulin-like domains of protist CDPKs have intron positions in common with animal and fungal calmodulin genes. These results, together with the presence of a highly conserved phase zero intron located precisely at the beginning of the calmodulin-like domain, suggest that the ancestral CDPK gene could have originated from the fusion of protein kinase and calmodulin genes facilitated by recombination of ancient introns.
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222
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Abstract
The lines of Blaschko describe distribution patterns which may represent embryologic developmental pathways. This distribution may occasionally be followed by some congenital and acquired skin disorders. We describe a child with linear cutaneous lupus erythematosus (LCLE) following Blaschko lines on the face.
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223
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Choi JH, Shin WS, Lee SH, Joo DJ, Lee JD, Choi SJ. Application of synthetic poly(DADM) flocculants for dye wastewater treatment. ENVIRONMENTAL TECHNOLOGY 2001; 22:1025-1033. [PMID: 11816765 DOI: 10.1080/09593332208618213] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Poly(DADM) flocculants were synthesized and applied for the removal of color, turbidity and organic materials from dye wastewater. The effect of poly(DADM) on color removal was investigated by comparing two treatments: (i) alum alone and (ii) alum/poly(DADM) in combination. The effects of poly(DADM) flocculant, poly(DADM) concentration, poly(DADM) types and pH on the removal efficiency of coloring materials were investigated. Poly(DADM) flocculants were highly efficient in the removal of color and turbidity from dye wastewater. Compared to treatment with alum alone, the addition of a small amount of poly(DADM) (25 mg l(-1)) reduced alum dosage by 50% while improving color removal efficiency. Highly efficient color removal was obtained in wide pH ranges by adding poly(DADM) as a flocculant. Our results indicate that the use of poly(DADM) flocculant is cost effective in dye wastewater treatment by reducing sludge production and the dosage of inorganic coagulant. Effects of zeta potential were also investigated.
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Chang SE, Choi JH, Sung KJ, Moon KC, Koh JK. A case of juvenile xanthogranuloma arising on a nevus sebaceus. Am J Dermatopathol 2001; 23:347-50. [PMID: 11481529 DOI: 10.1097/00000372-200108000-00013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Various epithelial and mesenchymal neoplasms can arise in nevus sebaceus (NS). Juvenile xanthogranuloma arising on an NS has not been reported previously. Juvenile xanthogranuloma, a disease characterized by reactive histiocytic proliferation, could be included in the list of secondary alterations arising on an NS.
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Park H, Hong KM, Sakanari JA, Choi JH, Park SK, Kim KY, Hwang HA, Paik MK, Yun KJ, Shin CH, Lee JB, Ryu JS, Min DY. Paragonimus westermani: cloning of a cathepsin F-like cysteine proteinase from the adult worm. Exp Parasitol 2001; 98:223-7. [PMID: 11560415 DOI: 10.1006/expr.2001.4634] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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