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Lee TK, Hur G, Kim JH, Park JHY, Yang H, Lee KW. Micro-grinding-based production for sulforaphene-enriched radish seeds extract via facilitating glucosinolates-myrosinase reaction, and evaluation of its anti-adipogenic effects. Food Chem 2023; 429:136864. [PMID: 37506660 DOI: 10.1016/j.foodchem.2023.136864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 07/08/2023] [Accepted: 07/10/2023] [Indexed: 07/30/2023]
Abstract
Sulforaphene (SFEN), an isothiocyanate (ITC) abundant in radish (Raphanus sativus) seeds (RS), has many health benefits, including anti-obesity effects. SFEN content is affected by multiple factors during processing, such as glucoraphenin (GLE) (the precursor of SFEN) availability, myrosinase (essential for conversion from GLE to SFEN) activity, and SFEN stability. We examined the physiochemical-properties and anti-adipogenic effects of SFEN-enriched RSE produced by two processes, roasting and micro-grinding. The roasting process lowered SFEN content and myrosinase activity over 50 °C. However, among micro-grinding conditions, smaller particle size (#2 grind, ≈11.31 μm) more effectively increased SFEN content in RS compared to larger particles (#1 grind, ≈ 179.50 μm) by accelerating available GLE and myrosinase release from RS. Grind #2 also effectively inhibited the adipogenesis of 3T3-L1 pre-adipocytes compared to #1. Thus, micro-grinding can be suggested for producing SFEN-enriched RSE with anti-adipogenic activity as a functional material for obesity prevention or treatment.
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Affiliation(s)
- Tae Kyung Lee
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea
| | - Gihyun Hur
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea
| | - Jong Hun Kim
- Department of Food Science and Biotechnology, Sungshin University, Seoul 01133, Republic of Korea; Basic Science Research Institute, Sungshin University, Seoul 01133, Republic of Korea
| | - Jung Han Yoon Park
- Bio-MAX Institute, Seoul National University, Seoul 08826, Republic of Korea
| | - Hee Yang
- Department of Food and Nutrition, Kookmin University, Seoul 02707, Republic of Korea.
| | - Ki Won Lee
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea; Bio-MAX Institute, Seoul National University, Seoul 08826, Republic of Korea; Advanced Institute of Convergence Technology, Seoul National University, Suwon 16229, Republic of Korea; Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea; Institutes of Green Bio Science & Technology, Seoul National University, Pyeongchang 25354, Republic of Korea; Center for Food and Bio convergence, Seoul National University, Seoul 08826, Republic of Korea.
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Yang H, Hur G, Lee TK, Kim JE, Kim JH, Kim JR, Kim J, Park JHY, Lee KW. Sulforaphane Mitigates High-Fat Diet-Induced Obesity by Enhancing Mitochondrial Biogenesis in Skeletal Muscle via the HDAC8-PGC1α Axis. Mol Nutr Food Res 2023; 67:e2300149. [PMID: 37775334 DOI: 10.1002/mnfr.202300149] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 06/13/2023] [Indexed: 10/01/2023]
Abstract
SCOPE Histone deacetylases (HDACs) play a crucial role in the transcriptional regulation of various genes which can contribute to metabolic disorders. Although sulforaphane (SFN), a natural HDAC inhibitor, has been reported to alleviate obesity in humans and mice, the specific mechanisms and how HDACs contribute to SFN's anti-obesity effects remain unclear. METHODS AND RESULTS Oral administration of SFN in mice fed high-fat diet increases peroxisome proliferator activating receptor γ coactivator (PGC1α)-induced mitochondrial biogenesis in skeletal muscle. Among HDACs, SFN specifically inhibits HDAC8 activity. SFN enhances mitochondrial DNA and adenosine triphosphate (ATP) production in C2C12 myotubes, similar to the action of PCI34051, a synthetic HDAC8-specific inhibitor. These effects are mediated by increased expression of PGC1α via upregulation of cAMP response element binding (CREB, Ser133 ) phosphorylation and p53 (Lys379 ) acetylation. These SFN-induced effects are not observed in cells with a genetic deletion of HDAC8, suggesting the existence of a regulatory loop between HDAC8 and PGC1α in SFN's action. CONCLUSION SFN prevents obesity-related metabolic dysregulation by enhancing mitochondrial biogenesis and function via targeting the HDAC8-PGCα axis. These results suggest SFN as a beneficial anti-obesity agent providing new insight into the role of HDAC8 in the PGC1α-mediated mitochondrial biogenesis, which may be a novel and promising drug target for metabolic diseases.
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Affiliation(s)
- Hee Yang
- Department of Food and Nutrition, Kookmin University, 77 Jeongneung-ro, Seongbuk-gu, Seoul, 02707, South Korea
| | - Gihyun Hur
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Republic of Korea
| | - Tae Kyung Lee
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jong-Eun Kim
- Department of Food Science and Technology, Korea National University of Transportation, Jeungpyeong, Republic of Korea
| | - Jong Hun Kim
- Department of Food Science and Biotechnology, Sungshin University, Seoul, 01133, Republic of Korea
- Basic Science Research Institute, Sungshin University, Seoul, 01133, Republic of Korea
| | - Jong Rhan Kim
- R&D Evaluation Center, Korea Institute of Science and Technology Evaluation and Planning, 1339 Eumseong-gun, Chungcheongbuk-do, Republic of Korea
| | - Jiyoung Kim
- Center for Food and Bioconvergence, Seoul National University, Seoul, 08826, Republic of Korea
| | | | - Ki Won Lee
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Republic of Korea
- Bio-MAX Institute, Seoul National University, Seoul, 08826, South Korea
- Advanced Institute of Convergence Technology, Seoul National University, Suwon, 16229, Republic of Korea
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea
- Institutes of Green Bio Science & Technology, Seoul National University, Pyeongchang, 25354, Republic of Korea
- Center for Food and Bioconvergence, Seoul National University, Seoul, 08826, Republic of Korea
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Lee TK, Hur G, Choi J, Ban C, Kim JY, Yang H, Park JHY, Lee KW, Kim JH. Enhancing stability and bioavailability of sulforaphene in radish seed extracts using nanoemulsion made with high oleic sunflower oil. Food Sci Biotechnol 2023; 32:1269-1279. [PMID: 37362810 PMCID: PMC10290006 DOI: 10.1007/s10068-023-01304-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/10/2023] [Accepted: 03/19/2023] [Indexed: 04/07/2023] Open
Abstract
The effect of nanoemulsions on the stability and bioavailability of sulforaphene (SFEN) in radish seed extract (RSE) was investigated. Four types of oil were used as lipid ingredients of the nanoemulsions: soybean, high oleic acid sunflower, coconut, and hydrogenated palm oils. SFEN in RSE nanoemulsions showed greater stability to temperature, acid, and alkaline conditions than SFEN in RSE suspended in water (RSE-S). Particularly under alkaline conditions, the half-life of SFEN in the nanoemulsion with high oleic sunflower oil (RSE-HOSO) was 8 times longer than that of RSE-S. Furthermore, in the pharmacokinetics study, it was observed that AUC0-8 increased and oral clearance (CL/F) decreased significantly in rats orally administered RSE-HOSO compared with RSE-S (p < 0.05). This study indicates that the type of oil used in nanoemulsions affects the stability and bioavailability of SFEN in RSE. These results may provide a guideline for the development of functional foods containing RSE. Supplementary Information The online version contains supplementary material available at 10.1007/s10068-023-01304-2.
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Affiliation(s)
- Tae Kyung Lee
- Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826 Republic of Korea
| | - Gihyun Hur
- Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826 Republic of Korea
| | - Jeongyoon Choi
- Department of Next Generation Applied Sciences, Graduate School, Sungshin Women’s University, Seoul, 01133 Republic of Korea
| | - Choongjin Ban
- Department of Environmental Horticulture, University of Seoul, Seoul, 02504 Republic of Korea
| | - Jong-Yea Kim
- Department of Food Science and Biotechnology, Institute of Fermentation and Brewing, Kangwon National University, Chuncheon, 24341 Republic of Korea
| | - Hee Yang
- Department of Food and Nutrition, Kookmin University, Seoul, 02707 Republic of Korea
| | - Jung Han Yoon Park
- Bio-MAX Institute, Seoul National University, Seoul, 08826 Republic of Korea
| | - Ki Won Lee
- Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826 Republic of Korea
- Bio-MAX Institute, Seoul National University, Seoul, 08826 Republic of Korea
- Advanced Institute of Convergence Technology, Seoul National University, Suwon, 16229 Republic of Korea
| | - Jong Hun Kim
- Department of Food Science and Biotechnology, Institute for Basic Sciences, Sungshin Women’s University, Seoul, 01133 Republic of Korea
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Shin SH, Hur G, Kim NR, Park JHY, Lee KW, Yang H. A machine learning-integrated stepwise method to discover novel anti-obesity phytochemicals that antagonize the glucocorticoid receptor. Food Funct 2023; 14:1869-1883. [PMID: 36723137 DOI: 10.1039/d2fo03466b] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
As a type of stress hormone, glucocorticoids (GCs) affect numerous physiological pathways by binding to the glucocorticoid receptor (GR) and regulating the transcription of various genes. However, when GCs are dysregulated, the resulting hypercortisolism may contribute to various metabolic disorders, including obesity. Thus, attempts have been made to discover potent GR antagonists that can reverse excess-GC-related metabolic diseases. Phytochemicals are a collection of valuable bioactive compounds that are known for their wide variety of chemotypes. Recently, various computational methods have been developed to obtain active phytochemicals that can modulate desired target proteins. In this study, we developed a workflow comprising two consecutive quantitative structure-activity relationship-based machine learning models to discover novel GR-antagonizing phytochemicals. These two models collectively identified 65 phytochemicals that bind to and antagonize GR. Of these, nine commercially available phytochemicals were validated for GR-antagonist and anti-obesity activities. In particular, we confirmed that demethylzeylasteral, a phytochemical of the Tripterygium wilfordii Radix, exhibits potent anti-obesity activity in vitro through GR antagonism.
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Affiliation(s)
- Seo Hyun Shin
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Republic of Korea.
| | - Gihyun Hur
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Republic of Korea.
| | - Na Ra Kim
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Republic of Korea.
| | - Jung Han Yoon Park
- Bio-MAX Institute, Seoul National University, Seoul, 08826, Republic of Korea
| | - Ki Won Lee
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Republic of Korea. .,Bio-MAX Institute, Seoul National University, Seoul, 08826, Republic of Korea.,Advanced Institutes of Convergence Technology, Seoul National University, Suwon, 16229, Republic of Korea
| | - Hee Yang
- Department of Food and Nutrition, Kookmin University, Seoul 02707, Republic of Korea.
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Lee Y, Yang H, Hur G, Yu J, Park S, Kim JH, Yoon Park JH, Shin HS, Kim JE, Lee KW. 5-(3',4'-Dihydroxyphenyl)-γ-valerolactone, a metabolite of procyanidins in cacao, suppresses MDI-induced adipogenesis by regulating cell cycle progression through direct inhibition of CDK2/cyclin O. Food Funct 2019; 10:2958-2969. [PMID: 31073569 DOI: 10.1039/c9fo00334g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Cacao (Theobroma cacao) has a significant polyphenol content and has been reported to elicit anti-obesity effects. Previous studies have focused on the properties of cacao extract and procyanidins, while the potential mechanisms have not been fully elucidated. Here, we investigated the inhibitory effects of procyanidin metabolites on adipogenic cocktail-induced adipogenesis and lipogenesis in 3T3-L1 preadipocytes. It was observed that 5-(3',4'-dihydroxyphenyl)-γ-valerolactone (DHPV), a major procyanidin metabolite, exhibited the greatest inhibitory effects on adipogenesis and lipogenesis. DHPV dose-dependently reduced the expression levels of proteins involved in adipogenesis including peroxisome proliferator-activated receptor γ (PPAR γ) and CCAT/enhancer-binding protein α (C/EBP α), as well as lipogenesis-related factors such as fatty acid synthase and acetyl-CoA carboxylase. These inhibitory effects were primarily due to G1 phase arrest and the suppression of cell proliferation during mitotic clonal expansion, the early stage of adipogenesis. In an extensive kinase array, DHPV directly suppressed activation of the CDK2/cyclin O complex, and inhibited the phosphorylation of C/EBP β, which is responsible for the induction of PPAR γ and C/EBP α. Taken together, these findings suggest that DHPV is a highly biologically active compound with potential anti-obesity effects and works by inhibiting the intracellular lipid content and cell differentiation.
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Affiliation(s)
- Younghyun Lee
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Republic of Korea.
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Ye Y, Lee Y, Park J, Kim S, Choi J, Hur G, Lee H, Lee E, Park H. The Clinical Evaluation of Chronic Urticaria Specific Quality of Life Questionnaire (CU-QOL) in Patients with Chronic Urticaria. J Allergy Clin Immunol 2011. [DOI: 10.1016/j.jaci.2010.12.173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Hur G, Lee K, Lee H, Choi G, Park H, Ye Y, Shim J, Park H. Association of HLA Allele and Sensitization to Specific IgG Antibody to MDI-HSA Conjugate in Exposed Workers. J Allergy Clin Immunol 2009. [DOI: 10.1016/j.jaci.2008.12.1028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Choi G, Hur G, Kim J, Kim J, Sung J, Palikhe N, Jeon I, Ye Y, Park H. Vit. D Binding Protein As A Diagnostic Marker For Isocyanate-induced Occupational Asthma. J Allergy Clin Immunol 2009. [DOI: 10.1016/j.jaci.2008.12.1034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Ryu JW, Hur G, Kim SW. Quantum localization in open chaotic systems. Phys Rev E Stat Nonlin Soft Matter Phys 2008; 78:037201. [PMID: 18851192 DOI: 10.1103/physreve.78.037201] [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] [Received: 02/05/2008] [Revised: 06/16/2008] [Indexed: 05/26/2023]
Abstract
We study a quasibound state of a delta -kicked rotor with absorbing boundaries focusing on the nature of the dynamical localization in open quantum systems. The localization lengths xi of lossy quasibound states located near the absorbing boundaries decrease as they approach the boundary while the corresponding decay rates Gamma are dramatically enhanced. We find the relation xi approximately Gamma(-1/2) and explain it based upon the finite time diffusion, which can also be applied to a random unitary operator model. We conjecture that this idea is valid for the system exhibiting both the diffusion in classical dynamics and the exponential localization in quantum mechanics.
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Affiliation(s)
- Jung-Wan Ryu
- Department of Physics Education and Department of Physics, Pusan National University, Busan 609-735, Korea
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Kang Y, Kim S, Ye Y, Hur G, Lee S, Lee H, Suh C, Nahm D, Park H. Functional Study Of Histamine N-methyltransferase (hnmt) Genetic Polymorphisms In Patients With Aspirin-intolerant Chronic Urticaria. J Allergy Clin Immunol 2007. [DOI: 10.1016/j.jaci.2006.12.589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Han YH, Kim MY, Kim SY, Kim YH, Hwang YJ, Seo JW, Cha SJ, Hur G. Percutaneous insertion of Zilver stent in malignant biliary obstruction. ACTA ACUST UNITED AC 2006; 31:433-8. [PMID: 16465567 DOI: 10.1007/s00261-005-8017-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2005] [Accepted: 08/23/2005] [Indexed: 11/27/2022]
Abstract
BACKGROUND We evaluated the clinical efficacy and technical feasibility of the percutaneously inserted self-expandable nitinol stent (Zilver stent) for palliation of malignant biliary obstruction. METHODS Seventeen patients with malignant tumors involving the intra- or extrahepatic bile duct who presented with obstructive jaundice underwent percutaneous insertion of a self-expandable nitinol stent. We retrospectively reviewed the hospital records of patients and evaluated the technical feasibility on stent placement, complications, patient survival, and duration of stent patency. RESULTS Percutaneous biliary stenting with 27 Zilver stents was performed in 17 patients with malignant biliary obstruction. Technical success was 95%. Malposition of the stent was encountered in one patient. Minor technical problems were encountered in two patients: the introducer tip was broken during stent insertion, so endoscopic removal was done. Mean follow-up period for the 17 patients was 182 days (range 29-485 days): nine patients died of progressive disease at a mean follow-up of 151 days (range 61-371days) after stent insertion and eight patients remained alive at the final follow-up of 216 days (range 29-485 days). The median survival period for all patients was 277 days. The stent occlusion rate was 26% and the mean patency period was 280 days. In five patients, seven stents were obstructed by tumor ingrowth and overgrowth. Stent patency rates were 100%, 100%, 75%, 61%, and 41% at 1, 2, 3, 6, and 12 months, respectively. A late complication, erosive bleeding of the hepatic artery by the stent, developed in one patient. CONCLUSION Percutaneous biliary stenting using the nitinol stent is technically feasible and safe and clinically efficacious treatment for malignant biliary obstruction, even with a minor technical problem during stent insertion.
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Affiliation(s)
- Y H Han
- Department of Radiology, Ilsan Paik Hospital, Medical College of Inje University, 2240, Daewha-dong, Ilsan-gu, Goyang-si, Gyonggi-do, 411-706, Korea.
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Hwang YJ, Hur G, Cha SJ, Kim YH, Kim SY, Kim MK. Intracranial xanthoma: long-term follow-up MR findings. AJNR Am J Neuroradiol 2006; 27:423-6. [PMID: 16484423 PMCID: PMC8148796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
SUMMARY We report the serial MR findings and histologic features of intracerebral xanthoma in a patient with hyperlipidemia. MR imaging revealed nodule formations with variable degrees of edema and enhancement in the perivascular spaces. In some lesions, high-signal-intensity foci were observed on unenhanced T1-weighted images, which suggest lipid contents of the lesion.
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Affiliation(s)
- Y J Hwang
- Department of Diagnostic Radiology, College of Medicine, Inje University, Ilsan Paik Hospital, Jyonggi-do, Koyangsi, South Korea
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Creffield CE, Hur G, Monteiro TS. Localization-delocalization transition in a system of quantum kicked rotors. Phys Rev Lett 2006; 96:024103. [PMID: 16486582 DOI: 10.1103/physrevlett.96.024103] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2005] [Revised: 10/26/2005] [Indexed: 05/06/2023]
Abstract
The quantum dynamics of atoms subjected to pairs of closely spaced delta kicks from optical potentials are shown to be quite different from the well-known paradigm of quantum chaos, the single delta-kick system. We find the unitary matrix has a new oscillating band structure corresponding to a cellular structure of phase space and observe a spectral signature of a localization-delocalization transition from one cell to several. We find that the eigenstates have localization lengths which scale with a fractional power L approximately h(-0.75) and obtain a regime of near-linear spectral variances which approximate the "critical statistics" relation summation2(L) approximately or equal to chi(L) approximately 1/2 (1-nu)L, where nu approximately 0.75 is related to the fractal classical phase-space structure. The origin of the nu approximately 0.75 exponent is analyzed.
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Affiliation(s)
- C E Creffield
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
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Lee S, Hur G, Jung H, Lee S, Kim J, Shin C, Shim J, In K, Kang K, Yoo S. P-958 Synergistic interaction between PPAR-γ agonist and gefitinib onlung cancer A549 cells. Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)81451-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Chen S, Phung S, Kwok S, Ye J, Hur G, Oh S, Smith D, Yuan YC, Karlsberg K, Lui K. Chemopreventive Properties of Mushrooms Against Breast Cancer and Prostate Cancer. Int J Med Mushrooms 2005. [DOI: 10.1615/intjmedmushrooms.v7.i3.71] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Jones PH, Stocklin MM, Hur G, Monteiro TS. Atoms in double-delta-kicked periodic potentials: chaos with long-range correlations. Phys Rev Lett 2004; 93:223002. [PMID: 15601086 DOI: 10.1103/physrevlett.93.223002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2004] [Indexed: 05/24/2023]
Abstract
We report an experimental and theoretical study of the dynamics of cold atoms subjected to pairs of closely spaced pulses in an optical lattice. For all previously studied delta-kicked systems, chaotic classical dynamics shows diffusion with short-time (2- or 3-kick) correlations; here, chaotic diffusion combines with new types of long-ranged global correlations, between all kick pairs, which control transport through trapping regions in phase space. Correlations are studied in the classical regime, but the diffusive behavior observed in experiment depends on the quantum dynamical localization.
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Affiliation(s)
- P H Jones
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
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Abstract
OBJECTIVE To report diffusion-weighted imaging (DWI) findings and postulate the pathogenic mechanism of Wernicke's encephalopathy (WE). PATIENT A 47-year-old-woman presented with altered consciousness, ophthalmoplegia, and ataxia. DWI revealed the abnormal signal changes in periaqueductal gray matter, mamillary bodies and bilateral medial thalami. Apparent diffusion coefficient (ADC) map revealed the high signal intensity lesions in bilateral medial thalami, suggestive of vasogenic edema. The abnormal signal intensity lesions disappeared on follow-up imaging with clinical improvement. CONCLUSIONS Vasogenic edema plays an important role in the pathogenesis of WE and can be reversed by proper management. DWI findings in the early stage of WE may provide useful information about the prognosis.
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Affiliation(s)
- K S Hong
- Department of Neurology, Ilsan Paik Hospital, Inje University College of Medicine, Gyeonggi-do, South Korea.
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Abstract
PURPOSE The purpose of this work was to evaluate the usefulness of CT scans for distinguishing torsed from uncomplicated benign cystic teratoma (BCT). METHOD Retrospective analysis was performed in 14 torsed BCTs (14 patients) and in 23 uncomplicated BCTs (20 patients) for comparison. The features on CT scans were compared to the pathologic findings. RESULTS CT findings indicating torsed BCT were the presence of eccentric wall thickening of >1 cm, peritumoral infiltration, and presence of enlarged solid tubal mass adjacent to the uterus (p < 0.05). CONCLUSION The present study suggests that CT is useful in differentiating torsed from uncomplicated BCT. Although CT findings are not specific for some patients, detection of certain CT findings could increase the diagnostic accuracy.
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Affiliation(s)
- Y H Kim
- Department of Diagnostic Radiology, Sanggye Paik Hospital, Inje University, Seoul, Korea
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Scotti DM, Leiber C, Hur G, Marks GJ. Ruptured inferior gluteal artery aneurysm with exsanguinating rectal hemorrhage controlled by transcatheter coil embolization. Dis Colon Rectum 1980; 23:313-7. [PMID: 6967395 DOI: 10.1007/bf02586836] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A case of exsanguinating rectal and retroperitoneal hemorrhage resulting from a ruptured inferior gluteal artery aneurysm is presented. Transcatheter embolization of Gelfoam and a Gianturco coil device resulted in the control of bleeding and proved to be a life-saving measure in a patient who was a poor surgical candidate.
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Majeed MA, Hussain SS, Hur G. The structure of a double-headed buffalo calf (Dicephalus dipus dibrachius). Vet Rec 1971; 88:393-5. [PMID: 5103364 DOI: 10.1136/vr.88.15.393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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