251
|
Yu CW, Gwon HC, Chun WJ, Choi YJ, Kim YH, Choi JH, Lee SC, Lee SH, Hong KP, Park JE. The Feasibility of 5-French Transradial Coronary Intervention, as Compared with a 6-French Approach, for Treating Chronic Total Occlusion. Korean Circ J 2007. [DOI: 10.4070/kcj.2007.37.7.298] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
|
252
|
Bischof JC, Mahr B, Choi JH, Behling M, Mewes D. Use of X-ray Tomography to Map Crystalline and Amorphous Phases in Frozen Biomaterials. Ann Biomed Eng 2006; 35:292-304. [PMID: 17136446 DOI: 10.1007/s10439-006-9176-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2005] [Accepted: 08/10/2006] [Indexed: 11/25/2022]
Abstract
The outcome of both cryopreservation and cryosurgical freezing applications is influenced by the concentration and type of the cryoprotective agent (CPA) or the cryodestructive agent (i.e., the chemical adjuvants referred to here as CDA) added prior to freezing. It also depends on the amount and type of crystalline, amorphous and/or eutectic phases formed during freezing which can differentially affect viability. This work describes the use of X-ray computer tomography (CT) for non-invasive, indirect determination of the phase, solute concentration and temperature within biomaterials (CPA, CDA loaded solutions and tissues) by X-ray attenuation before and after freezing. Specifically, this work focuses on establishing the feasibility of CT (100-420 kV acceleration voltage) to accurately measure the concentration of glycerol or salt as model CPA and CDAs in unfrozen solutions and tissues at 20 degrees C, or the phase in frozen solutions and tissue systems at -78.5 and -196 degrees C. The solutions are composed of water with physiological concentrations of NaCl (0.88% wt/wt) and DMEM (Dulbecco's Modified Eagle's Medium) with added glycerol (0-8 M). The tissue system is chosen as 3 mm thick porcine liver slices as well as 2 cm diameter cores which were either imaged fresh (3-4 h cold ischemia) or after loading with DMEM based glycerol solutions (0-8 M) for times ranging from hours to 7 days at 4 degrees C. The X-ray attenuation is reported in Hounsfield units (HU), a clinical measurement which normalizes X-ray attenuation values by the difference between those of water and air. NaCl solutions from 0 to 23.3% wt/wt (i.e. water to eutectic concentration) were found to linearly correspond to HU in a range from 0 to 155. At -196 degrees C the variation was from -80 to 95 HU while at -78.5 degrees C all readings were roughly 10 HU lower. At 20 degrees C NaCl and DMEM solutions with 0-8 M glycerol loading show a linear variation from 0 to 145 HU. After freezing to -78.5 degrees C the variation of the NaCl and DMEM solutions is more than twice as large between -90 and +190 HU and was distinctly non-linear above 6 M. After freezing to -196 degrees C the variation of the NaCl and DMEM solutions increased even further to -80 to +225 HU and was distinctly non-linear above 4 M, which after modeling the phase change and crystallization process is shown to correlate with an amorphous phase. In all tissue systems the HU readings were similar to solutions but higher by roughly 30 HU, as well as showing some deviations at 0 M after storage, probably due to tissue swelling. The standard deviations in all measurements were roughly 5 HU or below in all samples. In addition, two practical examples for CT use were demonstrated including: (1) glycerol loading and freezing of tissue cores and, (2) a mock cryosurgical procedure. In the loading experiment CT was able to measure the permeation of the glycerol into the sample at 20 degrees C, as well as the evolution of distinct amorphous vs. crystalline phases after freezing to -196 degrees C. In the mock cryosurgery example, the iceball edge was clearly visualized, and attempts to determine the temperature within the iceball are discussed. An added benefit of this work is that the density of these frozen samples, an essential property in measurement and modeling of thermal processes, was obtained in comparison to ice.
Collapse
|
253
|
Khay S, Abd El-Aty AM, Choi JH, Choi JT, Lim KT, Shim JH. Methomyl residue on Chinese cabbage grown under greenhouse conditions. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2006; 77:516-20. [PMID: 17123010 DOI: 10.1007/s00128-006-1094-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2006] [Accepted: 08/28/2006] [Indexed: 05/12/2023]
|
254
|
Kim Y, Choi EJ, Choi CG, Kim G, Choi JH, Yoo HW, Kim JS. Characteristics of CADASIL in Korea: A novel cysteine-sparing Notch3 mutation. Neurology 2006; 66:1511-6. [PMID: 16717210 DOI: 10.1212/01.wnl.0000216259.99811.50] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To elucidate the phenotype, genotype, and MRI findings of Korean patients with cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) and mutation carriers. METHODS The authors studied 40 members of nine unrelated Korean CADASIL families. After genetic analysis of Notch3, clinical and MRI findings were correlated in 27 mutation carriers. RESULT Notch3 mutation sites were C174R (one family, n = 3), R133C (one family, n = 3), R587C (one family, n = 1), R544C (two families, n = 5), and R75P (four families, n = 15). The clinical features were typical of CADASIL, but the frequency of migraine in the Korean population appears low. MRI abnormalities were found in 54% of the mutant carriers, the most common being white matter hyperintensities. The prevalence of lacunes and microbleeds increased with patient age. Anterior temporal areas were less often involved in subjects with R75P mutations than in those where mutations occurred in other sites (p = 0.02). Gradient echo imaging identified microbleedings in 33% of mutation carriers (64% of those with abnormal MRI), whereas diffusion-weighted MRI showed abnormal findings in only one patient. Neurologic disability was related to the number of lacunar infarcts and the lesion volume of white matter hyperintensities (p < 0.001) whereas MMSE score was related to the number of lacunar infarcts (p < 0.005). CONCLUSIONS Although Korean cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) mutation carriers show similar clinical and MRI findings, these abnormalities appear less frequently than in other populations. Relatively frequent microbleedings on gradient echo imaging suggest that treatment should be individualized according to MRI findings. The novel mutation of R75P, not involving a cysteine residue, is related to less frequent involvement of the anterior temporal area, thus broadening the spectrum of CADASIL.
Collapse
|
255
|
Yamamoto S, Zalipska J, Aliu E, Andringa S, Aoki S, Argyriades J, Asakura K, Ashie R, Berghaus F, Berns H, Bhang H, Blondel A, Borghi S, Bouchez J, Burguet-Castell J, Casper D, Catala J, Cavata C, Cervera A, Chen SM, Cho KO, Choi JH, Dore U, Espinal X, Fechner M, Fernandez E, Fukuda Y, Gomez-Cadenas J, Gran R, Hara T, Hasegawa M, Hasegawa T, Hayashi K, Hayato Y, Helmer RL, Hiraide K, Hosaka J, Ichikawa AK, Iinuma M, Ikeda A, Inagaki T, Ishida T, Ishihara K, Ishii T, Ishitsuka M, Itow Y, Iwashita T, Jang HI, Jeon EJ, Jeong IS, Joo KK, Jover G, Jung CK, Kajita T, Kameda J, Kaneyuki K, Kato I, Kearns E, Kerr D, Kim CO, Khabibullin M, Khotjantsev A, Kielczewska D, Kim JY, Kim SB, Kitching P, Kobayashi K, Kobayashi T, Konaka A, Koshio Y, Kropp W, Kubota J, Kudenko Y, Kuno Y, Kurimoto Y, Kutter T, Learned J, Likhoded S, Lim IT, Loverre PF, Ludovici L, Maesaka H, Mallet J, Mariani C, Matsuno S, Matveev V, McConnel K, McGrew C, Mikheyev S, Minamino A, Mine S, Mineev O, Mitsuda C, Miura M, Moriguchi Y, Morita T, Moriyama S, Nakadaira T, Nakahata M, Nakamura K, Nakano I, Nakaya T, Nakayama S, Namba T, Nambu R, Nawang S, Nishikawa K, Nitta K, Nova F, Novella P, Obayashi Y, Okada A, Okumura K, Oser SM, Oyama Y, Pac MY, Pierre F, Rodriguez A, Saji C, Sakuda M, Sanchez F, Sarrat A, Sasaki T, Sato H, Scholberg K, Schroeter R, Sekiguchi M, Shiozawa M, Shiraishi K, Sitjes G, Smy M, Sobel H, Sorel M, Stone J, Sulak L, Suzuki A, Suzuki Y, Takahashi T, Takenaga Y, Takeuchi Y, Taki K, Takubo Y, Tamura N, Tanaka M, Terri R, T'jampens S, Tornero-Lopez A, Totsuka Y, Ueda S, Vagins M, Whitehead L, Walter CW, Wang W, Wilkes RJ, Yamada S, Yanagisawa C, Yershov N, Yokoyama H, Yokoyama M, Yoo J, Yoshida M. Improved search for nu(mu) --> nu(e) oscillation in a long-baseline accelerator experiment. PHYSICAL REVIEW LETTERS 2006; 96:181801. [PMID: 16712358 DOI: 10.1103/physrevlett.96.181801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2006] [Indexed: 05/09/2023]
Abstract
We performed an improved search for nu(mu) --> nu(e) oscillation with the KEK to Kamioka (K2K) long-baseline neutrino oscillation experiment, using the full data sample of 9.2 x 10(19) protons on target. No evidence for a nu(e) appearance signal was found, and we set bounds on the nu(mu) --> nu(e) oscillation parameters. At Deltam(2)=2.8 x 10(-3) eV(2), the best-fit value of the K2Knu(mu) disappearance analysis, we set an upper limit of sin(2)2theta(mue) < 0.13 at a 90% confidence level.
Collapse
|
256
|
Stapf C, Mast H, Sciacca RR, Choi JH, Khaw AV, Connolly ES, Pile-Spellman J, Mohr JP. Predictors of hemorrhage in patients with untreated brain arteriovenous malformation. Neurology 2006; 66:1350-5. [PMID: 16682666 DOI: 10.1212/01.wnl.0000210524.68507.87] [Citation(s) in RCA: 509] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Intracranial hemorrhage is a serious possible complication in patients with brain arteriovenous malformation (AVM). Several morphologic factors associated with hemorrhagic AVM presentation have been established, but their relevance for the risk of subsequent AVM hemorrhage remains unclear. METHODS The authors analyzed follow-up data on 622 consecutive patients from the prospective Columbia AVM database, limited to the period between initial AVM diagnosis and the start of treatment (i.e., any endovascular, surgical, or radiation therapy). Univariate and multivariate logistic regression and Cox proportional hazard models were applied to analyze the effect of patient age, gender, AVM size, anatomic location, venous drainage pattern, and associated arterial aneurysms on the risk of intracranial hemorrhage at initial presentation and during follow-up. RESULTS The mean pretreatment follow-up was 829 days (median: 102 days), during which 39 (6%) patients experienced AVM hemorrhage. Increasing age (hazard ratio [HR] 1.05, 95% CI 1.03 to 1.08), initial hemorrhagic AVM presentation (HR 5.38, 95% CI 2.64 to 10.96), deep brain location (HR 3.25, 95% CI 1.30 to 8.16), and exclusive deep venous drainage (HR 3.25, 95% CI 1.01 to 5.67) were independent predictors of subsequent hemorrhage. Annual hemorrhage rates on follow-up ranged from 0.9% for patients without hemorrhagic AVM presentation, deep AVM location, or deep venous drainage to as high as 34.4% for those harboring all three risk factors. CONCLUSIONS Hemorrhagic arteriovenous malformation (AVM) presentation, increasing age, deep brain location, and exclusive deep venous drainage appear to be independent predictors for AVM hemorrhage during natural history follow-up. The risk of spontaneous hemorrhage may be low in AVMs without these risk factors.
Collapse
|
257
|
Park DI, Kim YH, Kim HS, Kim WH, Kim TI, Kim HJ, Yang SK, Byeon JS, Lee MS, Jung IK, Chung MK, Jung SA, Jeen YT, Choi JH, Choi H, Han DS, Song JS. Diagnostic yield of advanced colorectal neoplasia at colonoscopy, according to indications: an investigation from the Korean Association for the Study of Intestinal Diseases (KASID). Endoscopy 2006; 38:449-55. [PMID: 16767578 DOI: 10.1055/s-2006-925227] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
BACKGROUND AND STUDY AIMS The factors that more accurately predict the detection of colorectal cancers and adenomas at colonoscopy are different. We conducted a prospective multicenter study to evaluate which indications were most closely associated with advanced colorectal neoplasm (CRN), including colorectal cancer, in a group of patients undergoing colonoscopy. PATIENTS AND METHODS The 17 468 patients were enrolled in this study between July 2003 and March 2004, from 11 tertiary medical centers in Korea. They were recruited according to 11 itemized colonoscopic indications. The term "advanced adenoma" refers here to tubular adenomas of diameter of 11 mm or more, or to tubulovillous, villous, or severely dysplastic adenomas, irrespective of their size. Cancer was defined as the invasion of malignant cells beyond the muscularis mucosa. Advanced CRN was defined as advanced adenoma or invasive cancer. RESULTS Advanced CRN was found in 1227/17 307 patients (1176 advanced adenomas plus 51 carcinomas, 7.1 %). According to univariate and multivariate analysis, the factors associated with advanced CRN included age >60 years (odds ratio (OR) 2.1, 95 % confidence interval (CI) 1.8 - 2.4, P < 0.0001), male gender (OR 2.1, 95 %CI 1.7 - 2.7, P < 0.0001), referral for colonoscopy from primary care physician (OR 3.1, 95 %CI 2.5 - 3.7, P < 0.0001), and several other indications (OR 1.8, 95 %CI 1.5 - 2.3, P < 0.001). The yield of colonoscopy for advanced CRN was lower (2.2 %) than expected in patients with iron-deficiency anemia (OR 0.5, 95 %CI 0.2 - 0.9, P = 0.03). CONCLUSIONS Age, gender, and referral for colonoscopy from primary care physician constituted important independent predictors of advanced CRN in patients undergoing colonoscopy.
Collapse
|
258
|
Gwon HC, Doh JH, Choi JH, Lee SH, Hong KP, Park JE, Seo JD. A 5Fr Catheter Approach Reduces Patient Discomfort during Transradial Coronary Intervention Compared with a 6Fr Approach: A Prospective Randomized Study. J Interv Cardiol 2006; 19:141-7. [PMID: 16650242 DOI: 10.1111/j.1540-8183.2006.00121.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
Smaller guiding catheters can help reduce local complications and patient morbidity during transradial coronary intervention (TRI). This study was designed to compare the patient's morbidity, success rate, and the operator's convenience between 5-French (5Fr) and 6-French (6Fr) TRIs. This is a single-center prospective randomized study. Patients who underwent TRI, in 2003, were prospectively randomized to either 5Fr or 6Fr catheter groups (100 patients in each group). Procedure-related patient morbidity as well as clinical and procedural characteristics was scored and analyzed. Procedural success rate was not significantly different between the groups. The number of unsatisfactory supports (6% in 5Fr group, 3% in 6Fr group; P=0.31) and the incidence of local wound complications were not significantly different between the groups. Local wound pain scores were significantly lower in the 5Fr group compared with the 6Fr group, particularly during sheath insertion and removal, and during procedures. Pain scores were higher in female patients than in male patients during sheath removal (male: 1.3+/-1.3, female: 1.7+/-1.5; P=0.049). Radial artery diameter was well correlated with local pain score during sheath removal (r=0.31, P<0.001), and with the height and weight of the patients (height: r=0.33, P<0.001; weight: r=0.27, P<0.001). In conclusion, using a 5Fr catheter during TRI reduce, local access site pain, particularly in female patients with smaller body size, whereas the success and local complication rates were similar to a 6Fr approach.
Collapse
|
259
|
Kim JK, Park JW, Yang H, Choi M, Choi JH, Suh KY. Low-pressure detachment nanolithography. NANOTECHNOLOGY 2006; 17:940-946. [PMID: 21727363 DOI: 10.1088/0957-4484/17/4/017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A simple, one-step method is developed to fabricate various nanostructures such as nanoholes and nanolines based on the detachment of an organic polymer film in contact with a patterned polyurethane acrylate mould under a low physical pressure (1-2 bar) at ambient conditions. Calculation of the work of adhesion based on contact angle measurements indicates that the adhesion strength at the organic/mould interface is greater than that at the organic/substrate interface, resulting in a successful detachment without any surface modifications. 4,4(')-bis[N-1-napthyl-N-phenyl-amino]biphenyl (NPB) is used as the organic film owing to its low cohesion energy and stability in air. Nanoholes as small as 150 nm and nanolines as small as 50 nm have been fabricated using this approach. These nanostructures are used as a template for selective deposition of silver nanoparticles and a wet/dry etch resist for further pattern transfer.
Collapse
|
260
|
Abstract
Urea cycle disorders are known to be unusual causes of stroke. We report two infant cases of citrullinaemia that both initially presented with a stroke and suggest that urea cycle disorders should be included in the differential diagnosis of unexplained stroke during infancy and childhood.
Collapse
|
261
|
Choi JH, Fukushi K, Ng HY, Yamamoto K. Evaluation of a long-term operation of a submerged nanofiltration membrane bioreactor (NF MBR) for advanced wastewater treatment. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2006; 53:131-6. [PMID: 16749449 DOI: 10.2166/wst.2006.185] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Nanofiltration (NF) is considered as one of the most promising separation technologies to obtain a very good-quality permeate in water and wastewater treatment. A submerged NF membrane bioreactor (NF MBR) using polyamide membranes was tested for a long-term operation and the performance of the NF MBR was compared with that of a microfiltration MBR (MF MBR). Total organic carbon (TOC) concentration in the permeate of the NF MBR ranged from 0.5 to 2.0 mg/L, whereas that of the MF MBR showed an average of 5 mg/L. This could be explained by the tightness of the NF membrane. Although the concentration of organic matter in the supernatant of the NF MBR was higher than that in the permeate due to high rejection by the NF membrane, the NF MBR showed excellent treatment efficiency and satisfactory operational stability for a long-term operation.
Collapse
|
262
|
Hasegawa M, Aliu E, Andringa S, Aoki S, Argyriades J, Asakura K, Ashie R, Berns H, Bhang H, Blondel A, Borghi S, Bouchez J, Burguet-Castell J, Casper D, Cavata C, Cervera A, Chen SM, Cho KO, Choi JH, Dore U, Espinal X, Fechner M, Fernandez E, Fukuda Y, Gomez-Cadenas J, Gran R, Hara T, Hasegawa T, Hayashi K, Hayato Y, Helmer RL, Hill J, Hiraide K, Hosaka J, Ichikawa AK, Iinuma M, Ikeda A, Inagaki T, Ishida T, Ishihara K, Ishii T, Ishitsuka M, Itow Y, Iwashita T, Jang HI, Jeon EJ, Jeong IS, Joo KK, Jover G, Jung CK, Kajita T, Kameda J, Kaneyuki K, Kato I, Kearns E, Kerr D, Kim CO, Khabibullin M, Khotjantsev A, Kielczewska D, Kim JY, Kim SB, Kitching P, Kobayashi K, Kobayashi T, Konaka A, Koshio Y, Kropp W, Kubota J, Kudenko Y, Kuno Y, Kutter T, Learned J, Likhoded S, Lim IT, Loverre PF, Ludovici L, Maesaka H, Mallet J, Mariani C, Maruyama T, Matsuno S, Matveev V, Mauger C, McConnel K, McGrew C, Mikheyev S, Minamino A, Mine S, Mineev O, Mitsuda C, Miura M, Moriguchi Y, Morita T, Moriyama S, Nakadaira T, Nakahata M, Nakamura K, Nakano I, Nakaya T, Nakayama S, Namba T, Nambu R, Nawang S, Nishikawa K, Nitta K, Nova F, Novella P, Obayashi Y, Okada A, Okumura K, Oser SM, Oyama Y, Pac MY, Pierre F, Rodriguez A, Saji C, Sakuda M, Sanchez F, Sarrat A, Sasaki T, Sato H, Scholberg K, Schroeter R, Sekiguchi M, Sharkey E, Shiozawa M, Shiraishi K, Sitjes G, Smy M, Sobel H, Stone J, Sulak L, Suzuki A, Suzuki Y, Takahashi T, Takenaga Y, Takeuchi Y, Taki K, Takubo Y, Tamura N, Tanaka M, Terri R, T'jampens S, Tornero-Lopez A, Totsuka Y, Ueda S, Vagins M, Whitehead L, Walter CW, Wang W, Wilkes RJ, Yamada S, Yamamoto S, Yanagisawa C, Yershov N, Yokoyama H, Yokoyama M, Yoo J, Yoshida M, Zalipska J. Search for coherent charged pion production in neutrino-carbon interactions. PHYSICAL REVIEW LETTERS 2005; 95:252301. [PMID: 16384451 DOI: 10.1103/physrevlett.95.252301] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2005] [Indexed: 05/05/2023]
Abstract
We report the result from a search for charged-current coherent pion production induced by muon neutrinos with a mean energy of 1.3 GeV. The data are collected with a fully active scintillator detector in the K2K long-baseline neutrino oscillation experiment. No evidence for coherent pion production is observed, and an upper limit of is set on the cross section ratio of coherent pion production to the total charged-current interaction at 90% confidence level. This is the first experimental limit for coherent charged pion production in the energy region of a few GeV.
Collapse
|
263
|
Park BJ, Kyung KS, Choi JH, Im GJ, Kim IS, Shim JH. Environmental fate of the herbicide molinate in a rice-paddy-soil lysimeter. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2005; 75:937-44. [PMID: 16400582 DOI: 10.1007/s00128-005-0840-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2004] [Accepted: 08/26/2005] [Indexed: 05/06/2023]
|
264
|
Chang SE, Lee DK, Choi JH, Moon KC, Koh JK. Majocchi's granuloma of the vulva caused by Trichophyton mentagrophytes. Mycoses 2005; 48:382-4. [PMID: 16262873 DOI: 10.1111/j.1439-0507.2005.01147.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report a case of Majocchi's granuloma caused by Trichophyton mentagrophytes on the vulva in a 23-year-old girl who had used topical steroids for many years. Her dog was a source of the infection.
Collapse
|
265
|
Choi SH, Lee HH, Lee DS, Choi JH, Heo JS, Lee KW, Joh JW, Kim SJ, Yoo BC, Lee JH, Choi MS, Choe YH, Lee SK. Clinicopathological features of incidental hepatocellular carcinoma in liver transplantation. Transplant Proc 2005; 36:2293-4. [PMID: 15561224 DOI: 10.1016/j.transproceed.2004.08.076] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The incidence of detecting hepatocellular carcinoma (HCC) in a removed recipient liver after a liver transplant is not rare. The clinical features are expected to be different from the preoperatively diagnosed HCC. The aim of this study was to evaluate the clinicopathological features of incidental HCC. This study retrospectively analyzed five cases of incidental HCC among 51 liver transplant cases of HCC operated from September 1996 to February 2002. The proportion of an incidental HCC was 9.8%. The mean age was 46.2 years with a higher prevalence in may (80%, four cases). The alpha-fetoprotein level was normal or mildly elevated. HBsAg was positive in all cases. Imaging studies revealed regenerative or dysplastic nodules, or no specific lesion. The pathological findings demonstrated a mean size of 1.16 cm, multiplicity in three cases (60%), no microvascular invasion, and Edmonson grade I (60%) and II (40%). There was no recurrence of the HCC. However, two patients died due to an intracranial hemorrhage and a graft failure, respectively. In conclusion, incidentally found HCC showed less invasive pathological features and a better prognosis.
Collapse
|
266
|
Guk SM, Kook J, Jeon YH, Choi JH, Han ET, Shin EH, Chai JY. Suppressed Cytokine and Immunoglobulin Secretions by Murine Splenic Lymphocytes Infected In Vitro with Toxoplasma gondii Tachyzoites. J Parasitol 2005; 91:467-70. [PMID: 15986629 DOI: 10.1645/ge-404r] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Mechanisms of host immunosuppression after infection with Toxoplasma gondii are unclear. This study was performed to observe cytokine and immunoglobulin secretions by murine splenic lymphocytes infected in vitro with live, nonreplicating (irradiated) RH tachyzoites on stimulation with concanavalin A (Con A) or lipopolysaccharide (LPS). For lymphocyte cultivation, 3 groups were prepared: coculture with live nonirradiated tachyzoites separated by a transwell (group T), live irradiated tachyzoites without a transwell (group R), and no tachyzoites (group C). Compared with group T, groups R and C, on stimulation with Con A, revealed significantly (P < 0.05) lower levels of interleukin-2 (IL-2) and IFN-gamma, but not IL-10. The levels of IgG1, IgG2a, IgG2b, IgG3, IgA, and IgM were also significantly (P < 0.05) lower in groups R and C than in group T after stimulation with LPS. The results suggest that intracellular infection of murine splenic lymphocytes with T. gondii tachyzoites could impair their capacity to produce cytokine and immunoglobulin secretions.
Collapse
|
267
|
Aliu E, Andringa S, Aoki S, Argyriades J, Asakura K, Ashie R, Berns H, Bhang H, Blondel A, Borghi S, Bouchez J, Burguet-Castell J, Casper D, Cavata C, Cervera A, Cho KO, Choi JH, Dore U, Espinal X, Fechner M, Fernandez E, Fukuda Y, Gomez-Cadenas J, Gran R, Hara T, Hasegawa M, Hasegawa T, Hayashi K, Hayato Y, Helmer RL, Hill J, Hiraide K, Hosaka J, Ichikawa AK, Iinuma M, Ikeda A, Inagaki T, Ishida T, Ishihara K, Ishii T, Ishitsuka M, Itow Y, Iwashita T, Jang HI, Jeon EJ, Jeong IS, Joo K, Jover G, Jung CK, Kajita T, Kameda J, Kaneyuki K, Kato I, Kearns E, Kerr D, Kim CO, Khabibullin M, Khotjantsev A, Kielczewska D, Kim JY, Kim S, Kitching P, Kobayashi K, Kobayashi T, Konaka A, Koshio Y, Kropp W, Kubota J, Kudenko Y, Kuno Y, Kutter T, Learned J, Likhoded S, Lim IT, Loverre PF, Ludovici L, Maesaka H, Mallet J, Mariani C, Maruyama T, Matsuno S, Matveev V, Mauger C, McConnel K, McGrew C, Mikheyev S, Minamino A, Mine S, Mineev O, Mitsuda C, Miura M, Moriguchi Y, Morita T, Moriyama S, Nakadaira T, Nakahata M, Nakamura K, Nakano I, Nakaya T, Nakayama S, Namba T, Nambu R, Nawang S, Nishikawa K, Nitta K, Nova F, Novella P, Obayashi Y, Okada A, Okumura K, Oser SM, Oyama Y, Pac MY, Pierre F, Rodriguez A, Saji C, Sakuda M, Sanchez F, Sarrat A, Sasaki T, Scholberg K, Schroeter R, Sekiguchi M, Sharkey E, Shiozawa M, Shiraishi K, Sitjes G, Smy M, Sobel H, Stone J, Sulak L, Suzuki A, Suzuki Y, Takahashi T, Takenaga Y, Takeuchi Y, Taki K, Takubo Y, Tamura N, Tanaka M, Terri R, T'Jampens S, Tornero-Lopez A, Totsuka Y, Ueda S, Vagins M, Walter CW, Wang W, Wilkes RJ, Yamada S, Yamamoto S, Yanagisawa C, Yershov N, Yokoyama H, Yokoyama M, Yoo J, Yoshida M, Zalipska J. Evidence for muon neutrino oscillation in an accelerator-based experiment. PHYSICAL REVIEW LETTERS 2005; 94:081802. [PMID: 15783876 DOI: 10.1103/physrevlett.94.081802] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2004] [Indexed: 05/24/2023]
Abstract
We present results for nu(mu) oscillation in the KEK to Kamioka (K2K) long-baseline neutrino oscillation experiment. K2K uses an accelerator-produced nu(mu) beam with a mean energy of 1.3 GeV directed at the Super-Kamiokande detector. We observed the energy-dependent disappearance of nu(mu), which we presume have oscillated to nu(tau). The probability that we would observe these results if there is no neutrino oscillation is 0.0050% (4.0 sigma).
Collapse
|
268
|
Choi JH, Damm CJ, O'Donovan NJ, Sawyer RF, Koshland CP, Lucas D. Detection of lead in soil with excimer laser fragmentation fluorescence spectroscopy. APPLIED SPECTROSCOPY 2005; 59:258-261. [PMID: 15720768 DOI: 10.1366/0003702053085052] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
|
269
|
Brummer E, Choi JH, Stevens DA. Interaction between conidia, lung macrophages, immunosuppressants, proinflammatory cytokines and transcriptional regulation. Med Mycol 2005; 43 Suppl 1:S177-9. [PMID: 16110809 DOI: 10.1080/13693780500051497] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
The immunosuppressive effect of dexamethasone (DEX) on macrophage killing activity and cytokine production in response to Aspergillus fumigatus conidia is antagonized by granulocyte-macrophage colony-stimulating factor (GM-CSF). However, the intersection of signaling pathways and the molecular mechanism of this antagonism remain to be defined. We postulated that DEX inhibition of NF-kappaB was opposed by induction of IkappaB kinases (IKK) by GM-CSF + conidia stimulation, degradation of IkappaB, and release of nuclear factor kappa B (NF-kappaB). This hypothesis was tested using resident peritoneal macrophages from CD-1 mice and the murine macrophage RAW 264.7 cell line. Macrophages were unstimulated or stimulated with A. fumigatus conidia and simultaneously treated with DEX, GM-CSF or DEX + GM-CSF for 2 4 hours. IkappaB degradation in cytoplasmic extracts and translocation of NF-kappaB in nuclear extracts was measured by Western blot analysis. This showed GM-CSF reverses the immunosuppressive effect of DEX by enhancing the degradation of IkappaB and promoting the translocation of NF-kappaB to the nucleus. This would allow the production of proinflammatory cytokines by macrophages, facilitating resistance to A. fumigatus.
Collapse
|
270
|
Sung J, Choi JH, On YK, Lee SC, Park SW, Gwon HC, Jeon ES, Kim JS, Kim DK, Lee SH, Hong KP, Park JE, Seo JD. Study of Compliance to Antihypertensive Medication in Korean Hypertensive Patients Using Medication Event Monitoring System. Korean Circ J 2005. [DOI: 10.4070/kcj.2005.35.11.821] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
|
271
|
Choi JH, Fukushi K, Yamamoto K. Comparison of treatment efficiency of submerged nanofiltration membrane bioreactors using cellulose triacetate and polyamide membrane. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2005; 51:305-12. [PMID: 16003990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
This study evaluates the performance of nanofiltration membrane bioreactor (NF MBR) systems using cellulose triacetate (CA) and polyamide (PA) membranes. The results indicated that both NF membranes could produce high quality permeate in the submerged NF MBR system. In addition, hollow fiber CA membranes exhibited the capability of higher permeate productivity than PA membranes. However, to obtain high quality permeate for a long-term operation, CA membranes should be maintained using an appropriate method, such as chlorine disinfection, in order to control the membrane biodegradation. The results demonstrated that PA membranes were capable of producing higher quality permeate for a long period than CA membranes. In order to enhance the practicability of PA membranes in submerged NF MBR systems, it is required that the membranes should have the lowest possible intrinsic salt rejection.
Collapse
|
272
|
Kim ST, Choi JH, Jeon HG, Cha HE, Hwang YJ, Chung YS. Comparison between polymerase chain reaction and fungal culture for the detection of fungi in patients with chronic sinusitis and normal controls. Acta Otolaryngol 2005; 125:72-5. [PMID: 15799578 DOI: 10.1080/00016480410018133] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
CONCLUSION PCR using panfungal gene primers is a more sensitive method for fungus detection than fungus culture, both in patients with chronic sinusitis and in normal controls. The presence of fungi alone, however, was insufficient to implicate them as pathogens in chronic sinusitis. OBJECTIVE Previous findings have suggested that polymerase chain reaction (PCR)-based methods are more sensitive and reliable than conventional culture methods for the detection of fungal DNA. We therefore compared these methods in 82 patients with chronic sinusitis and 40 normal controls. MATERIAL AND METHODS The noses of the subjects were irrigated with sterile saline, and the samples collected. The sediment from each irrigation was used for fungus culture and PCR analysis. RESULTS PCR analysis using panfungal gene primers showed that 76/82 (92.5%) patients with chronic sinusitis and 39/40 (97.5%) normal controls were positive. In contrast, fungus cultures were positive in 19/82 (23.2%) patients with chronic sinusitis and 12/40 (30.0%) normal controls. We observed no significant between-group differences in the prevalence of fungus or in the fungal species detected.
Collapse
|
273
|
Ahn MH, Aoki S, Ashie Y, Bhang H, Boyd S, Casper D, Choi JH, Fukuda S, Fukuda Y, Gran R, Hara T, Hasegawa M, Hasegawa T, Hayashi K, Hayato Y, Hill J, Ichikawa AK, Ikeda A, Inagaki T, Ishida T, Ishii T, Ishitsuka M, Itow Y, Iwashita T, Jang HI, Jang JS, Jeon EJ, Joo KK, Jung CK, Kajita T, Kameda J, Kaneyuki K, Kato I, Kearns E, Kibayashi A, Kielczewska D, Kim BJ, Kim CO, Kim JY, Kim SB, Kobayashi K, Kobayashi T, Koshio Y, Kropp WR, Learned JG, Lim SH, Lim IT, Maesaka H, Maruyama T, Matsuno S, Mauger C, Mcgrew C, Minamino A, Mine S, Miura M, Miyano K, Morita T, Moriyama S, Nakahata M, Nakamura K, Nakano I, Nakata F, Nakaya T, Nakayama S, Namba T, Nambu R, Nishikawa K, Nishiyama S, Noda S, Obayashi Y, Okada A, Oyama Y, Pac MY, Park H, Saji C, Sakuda M, Sarrat A, Sasaki T, Sasao N, Scholberg K, Sekiguchi M, Sharkey E, Shiozawa M, Shiraishi KK, Smy M, Sobel HW, Stone JL, Suga Y, Sulak LR, Suzuki A, Suzuki Y, Takeuchi Y, Tamura N, Tanaka M, Totsuka Y, Ueda S, Vagins MR, Walter CW, Wang W, Wilkes RJ, Yamada S, Yamamoto S, Yanagisawa C, Yokoyama H, Yoo J, Yoshida M, Zalipska J. Search for electron neutrino appearance in a 250 km long-baseline experiment. PHYSICAL REVIEW LETTERS 2004; 93:051801. [PMID: 15323684 DOI: 10.1103/physrevlett.93.051801] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2004] [Indexed: 05/24/2023]
Abstract
We present a search for electron neutrino appearance from accelerator-produced muon neutrinos in the K2K long-baseline neutrino experiment. One candidate event is found in the data corresponding to an exposure of 4.8 x 10(19) protons on target. The expected background in the absence of neutrino oscillations is estimated to be 2.4+/-0.6 events and is dominated by misidentification of events from neutral current pi(0) production. We exclude the nu(micro) to nu(e) oscillations at 90% C.L. for the effective mixing angle in the 2-flavor approximation of sin((2)2theta(microe)( approximately 1/2sin((2)2theta(13))>0.15 at Deltam(2)(microe)=2.8 x 10(-3) eV(2), the best-fit value of the nu(micro) disappearance analysis in K2K. The most stringent limit of sin((2)2theta(microe)<0.09 is obtained at Deltam(2)(microe)=6 x 10(-3) eV(2).
Collapse
|
274
|
Kang HS, Choi JH, Cho WK, Park JC, Choi JS. A sphingolipid and tyrosinase inhibitors from the fruiting body ofphellinus linteus. Arch Pharm Res 2004; 27:742-50. [PMID: 15357002 DOI: 10.1007/bf02980143] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This paper for the first time reports the isolation of 5 compounds from Phellinus linteus. A sphingolipid (1) and two tyrosinase inhibitory compounds (2, 3) along with two carboxylic acids (4, 5), were isolated from the fruiting body of Phellinus linteus (Berk & Curt) Aoshima. The structure of compound 1 was identified as 1-omicron-beta-D-glucopyranosyl-(2S, 3R, 4E, 8E)-2-[(2R)-2-hydroxyhexadecanoylamino]-9-methyl-4,8-octadecadiene-1,3-diol, known as cerebroside B, based on spectroscopic methods such as 1 D and 2D NMR as well as by acid hydrolysis. Compounds 2 -5 were identified as protocatechualdehyde (2), 5-hydroxymethyl-2-furaldehyde (HMF) (3), succinic acid (4), and fumaric acid (5) based on the spectroscopic evidence. Compounds 2 and 3 inhibited the oxidation of L-tyrosine catalyzed by mushroom tyrosinase with an IC50 of 0.40 and 90.8 microg/mL, respectively. The inhibitory kinetics, which were analyzed by the Lineweaver-Burk plots, were found to be competitive and noncompetitive inhibitors with a Ki of 1.1 microM and 1.4 mM, respectively.
Collapse
|
275
|
Choi JH, Lee SY. Secretory and extracellular production of recombinant proteins using Escherichia coli. Appl Microbiol Biotechnol 2004; 64:625-35. [PMID: 14966662 DOI: 10.1007/s00253-004-1559-9] [Citation(s) in RCA: 412] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2003] [Revised: 12/25/2003] [Accepted: 12/30/2003] [Indexed: 11/30/2022]
Abstract
Escherichia coli is one of the most widely used hosts for the production of recombinant proteins. However, there are often problems in recovering substantial yields of correctly folded proteins. One approach to solve these problems is to have recombinant proteins secreted into the periplasmic space or culture medium. The secretory production of recombinant proteins has several advantages, such as simplicity of purification, avoidance of protease attack and N-terminal Met extension, and a better chance of correct protein folding. In addition to the well-established Sec system, the twin-arginine translocation (TAT) system has recently been employed for the efficient secretion of folded proteins. Various strategies for the extracellular production of recombinant proteins have also been developed. For the secretory production of complex proteins, periplasmic chaperones and protease can be manipulated to improve the yields of secreted proteins. This review discusses recent advances in secretory and extracellular production of recombinant proteins using E. coli.
Collapse
|