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Sreekantan Preetha N, Kang DY, Darvin P, Kim DN, Joung YH, Kim SY, Cho KH, Do CH, Park KD, Lee JH, Lee HY, Park JH, Yang YM. Induction ofin vitroketosis condition and suppression using methylsulfonylmethane by altering ANGPTL3 expression through STAT5b signaling mechanism. Anim Cells Syst (Seoul) 2015. [DOI: 10.1080/19768354.2014.999016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
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102
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Cho WK, Kim H, Lee HY, Han KD, Jeon YJ, Jung IA, Kim SH, Cho KS, Park SH, Jung MH, Suh BK. Insulin Resistance of Normal Weight Central Obese Adolescents in Korea Stratified by Waist to Height Ratio: Results from the Korea National Health and Nutrition Examination Surveys 2008-2010. Int J Endocrinol 2015; 2015:158758. [PMID: 26257779 PMCID: PMC4519535 DOI: 10.1155/2015/158758] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 07/08/2015] [Indexed: 11/25/2022] Open
Abstract
Background. To evaluate insulin resistance of normal weight central obese 13-18-year-old male and female adolescents stratified by waist to height ratio (WHR). Methods. Data were obtained from the Korea National Health and Nutrition Examination Survey (K-NHANES) conducted during 2008-2010. Central obesity was defined as that in the upper quartile of age and sex specific WHR. Subjects were classified into no central obesity normal weight (NW), central obesity normal weight (CONW), no central obesity overweight (OW), and central obesity overweight (COOW). Results. The prevalence of CONW was 9.6% (83/832) in female and 7.0% (61/909) in male. CONW showed higher levels of insulin (P < 0.006), HOMA-IR (P < 0.006), and ALT (P < 0.001) than NW in female. CONW had higher levels of insulin (P < 0.0001), HOMA-IR (P < 0.0001), and WBC count (P < 0.021) and lower level of HDL (P < 0.0001) than NW in male. WHR and BMI had similar significant correlations with MS components. CONW showed 2.5 times (95% confidence interval, 1.21-5.00) more likelihood to have high insulin resistance than NW in male. Conclusions. Screening for central obesity using WHR in clinical setting is recommended.
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Affiliation(s)
- Won Kyoung Cho
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul 137-701, Republic of Korea
| | - Hyojin Kim
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul 137-701, Republic of Korea
| | - Hyun Young Lee
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul 137-701, Republic of Korea
| | - Kyung Do Han
- Department of Biostatistics, College of Medicine, The Catholic University of Korea, Seoul 137-701, Republic of Korea
| | - Yeon Jin Jeon
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul 137-701, Republic of Korea
| | - In Ah Jung
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul 137-701, Republic of Korea
| | - Shin Hee Kim
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul 137-701, Republic of Korea
| | - Kyoung Soon Cho
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul 137-701, Republic of Korea
| | - So Hyun Park
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul 137-701, Republic of Korea
| | - Min Ho Jung
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul 137-701, Republic of Korea
| | - Byung-Kyu Suh
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul 137-701, Republic of Korea
- *Byung-Kyu Suh:
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103
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Han TS, Kwack KS, Park S, Min BH, Yoon SH, Lee HY, Lee KB. A superficial hyperechoic band in human articular cartilage on ultrasonography with histological correlation: preliminary observations. Ultrasonography 2014; 34:115-24. [PMID: 25656333 PMCID: PMC4372710 DOI: 10.14366/usg.14047] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2014] [Revised: 12/27/2014] [Accepted: 12/28/2014] [Indexed: 12/02/2022] Open
Abstract
Purpose: To demonstrate the superficial hyperechoic band (SHEB) in articular cartilage by using ultrasonography (US) and to assess its correlation with histological images. Methods: In total, 47 regions of interest (ROIs) were analyzed from six tibial osteochondral specimens (OCSs) that were obtained after total knee arthroplasty. Ultrasonograms were obtained for each OCS. Then, matching histological sections from all specimens were obtained for comparison with the ultrasonograms. Two types of histological staining were used: Safranin-O stain (SO) to identify glycosaminoglycans (GAG) and Masson’s trichrome stain (MT) to identify collagen. In step 1, two observers evaluated whether there was an SHEB in each ROI. In step 2, the two observers evaluated which histological staining method correlated better with the SHEB by using the ImageJ software. Results: In step 1 of the analysis, 20 out of 47 ROIs showed an SHEB (42.6%, kappa=0.579). Step 2 showed that the SHEB correlated significantly better with the topographical variation in stainability in SO staining, indicating the GAG distribution, than with MT staining, indicating the collagen distribution (P<0.05, kappa=0.722). Conclusion: The SHEB that is frequently seen in human articular cartilage on high-resolution US correlated better with variations in SO staining than with variations in MT staining. Thus, we suggest that a SHEB is predominantly related to changes in GAG. Identifying an SHEB by US is a promising method for assessing the thickness of articular cartilage or for monitoring early osteoarthritis.
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Affiliation(s)
- Tae Sun Han
- Department of Radiology, Ajou University School of Medicine, Suwon, Korea ; Musculoskeletal Imaging Laboratory, Ajou University Medical Center, Suwon, Korea
| | - Kyu-Sung Kwack
- Department of Radiology, Ajou University School of Medicine, Suwon, Korea ; Musculoskeletal Imaging Laboratory, Ajou University Medical Center, Suwon, Korea
| | - Sunghoon Park
- Department of Radiology, Ajou University School of Medicine, Suwon, Korea ; Musculoskeletal Imaging Laboratory, Ajou University Medical Center, Suwon, Korea
| | - Byoung-Hyun Min
- Department of Orthopedic Surgery, Ajou University School of Medicine, Suwon, Korea ; Cartilage Regeneration Center, Ajou University Medical Center, Suwon, Korea
| | - Seung-Hyun Yoon
- Cartilage Regeneration Center, Ajou University Medical Center, Suwon, Korea
| | - Hyun Young Lee
- Regional Clinical Trial Center, Ajou University Medical Center, Suwon, Korea ; Department of Biostatistics, Yonsei University College of Medicine, Seoul, Korea
| | - Kyi Beom Lee
- Department of Pathology, Ajou University School of Medicine, Suwon, Korea
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104
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Ohshima S, Kobayashi S, Yamamoto S, Nagasaki K, Mizuuchi T, Kado S, Okada H, Minami T, Lee HY, Zang L, Kenmochi N, Kasajima K, Ohtani Y, Shi N, Nagae Y, Konoshima S, Sano F. Highly time-resolved evaluation technique of instantaneous amplitude and phase difference using analytic signals for multi-channel diagnostics. Rev Sci Instrum 2014; 85:11E814. [PMID: 25430379 DOI: 10.1063/1.4891102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A fluctuation analysis technique using analytic signals is proposed. Analytic signals are suitable to characterize a single mode with time-dependent amplitude and frequency, such as an MHD mode observed in fusion plasmas since the technique can evaluate amplitude and frequency at a specific moment without limitations of temporal and frequency resolutions, which is problematic in Fourier-based analyses. Moreover, a concept of instantaneous phase difference is newly introduced, and error of the evaluated phase difference and its error reduction techniques using conditional/ensemble averaging are discussed. These techniques are applied to experimental data of the beam emission spectroscopic measurement in the Heliotron J device, which demonstrates that the technique can describe nonlinear evolution of MHD instabilities. This technique is widely applicable to other diagnostics having necessity to evaluate phase difference.
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Affiliation(s)
- S Ohshima
- Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - S Kobayashi
- Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - S Yamamoto
- Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - K Nagasaki
- Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - T Mizuuchi
- Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - S Kado
- Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - H Okada
- Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - T Minami
- Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - H Y Lee
- Korea Advanced Institute of Science and Technology, Daejeon 305-701, South Korea
| | - L Zang
- Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - N Kenmochi
- Graduate School of Energy Science, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - K Kasajima
- Graduate School of Energy Science, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Y Ohtani
- Graduate School of Energy Science, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - N Shi
- Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Y Nagae
- Graduate School of Energy Science, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - S Konoshima
- Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - F Sano
- Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
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105
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Lee HY, Hong SH, Hong J, Lee SH, Jang S, Jang J, Jeon T, Park JS, Choe W. Development of a particle injection system for impurity transport study in KSTAR. Rev Sci Instrum 2014; 85:11D862. [PMID: 25430275 DOI: 10.1063/1.4886958] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A solid particle injection system is developed for KSTAR. The system has a compact size, compatibility with a strong magnetic field and high vacuum environment, and the capability to inject a small amount of solid particles with a narrow injection angle. The target flight-distance of 10 cm has been achieved with a particle loss rate of less than 10%. Solid impurity particles such as tungsten and carbon will be injected by this system at the midplane in KSTAR. The impurity transport feature will be studied with a soft X-ray array, a vacuum ultra-violet diagnostic, and Stand Alone Non-Corona code.
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Affiliation(s)
- H Y Lee
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea and Fusion Plasma Transport Research Center, Daejeon 305-701, Republic of Korea
| | - Suk-Ho Hong
- National Fusion Research Institute, Daejeon 305-806, Republic of Korea
| | - Joohwan Hong
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea and Fusion Plasma Transport Research Center, Daejeon 305-701, Republic of Korea
| | - Seung Hun Lee
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea and Fusion Plasma Transport Research Center, Daejeon 305-701, Republic of Korea
| | - Siwon Jang
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea and Fusion Plasma Transport Research Center, Daejeon 305-701, Republic of Korea
| | - Juhyeok Jang
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea and Fusion Plasma Transport Research Center, Daejeon 305-701, Republic of Korea
| | - Taemin Jeon
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea and Fusion Plasma Transport Research Center, Daejeon 305-701, Republic of Korea
| | - Jae Sun Park
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea and Fusion Plasma Transport Research Center, Daejeon 305-701, Republic of Korea
| | - Wonho Choe
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea and Fusion Plasma Transport Research Center, Daejeon 305-701, Republic of Korea
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106
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Lee M, Lim TS, Lee HY, Moon SY. Profile of memory impairment as a prognostic marker in amnestic mild cognitive impairment. J Neurol Sci 2014; 347:124-8. [PMID: 25394906 DOI: 10.1016/j.jns.2014.09.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 09/01/2014] [Accepted: 09/18/2014] [Indexed: 10/24/2022]
Abstract
We aimed to evaluate whether recognition memory can be used to identify patients with amnestic mild cognitive impairment (aMCI) at greater risk for converting to dementia. We recruited 2172 aMCI patients. They were divided into two groups: aMCI with impaired recall but normal recognition (aMCI-IRNR) vs aMCI with impaired recall and impaired recognition (aMCI-IRIR). We compared demographic findings and neuropsychological performance and illustrated the difference in converting to dementia between the two groups. Study subjects consisted of 1022 (47.0%) patients with aMCI-IRNR and 1150 (53.0%) patients with aMCI-IRIR. In most neuropsychological tests except for digit span forward, patients with aMCI-IRIR were more impaired than patients with aMCI-IRNR even after adjustment of their age and sex. Cox analysis adjusting age and gender revealed that the risk of dementia conversion was higher in patients with aMCI-IRIR than in patients with aMCI-IRNR [hazard ratio (HR)=1.400, 95% CI 1.009-1.943; P=0.044]. This study showed that recognition memory can be used to identify patients with amnestic mild cognitive impairment (aMCI) at greater risk for converting to dementia.
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Affiliation(s)
- Manyong Lee
- Department of Neurology, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Tae Sung Lim
- Department of Neurology, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Hyun Young Lee
- Regional Clinical Trial Center, Ajou University Medical Center, Suwon, Republic of Korea; Department of Biostatistics, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - So Young Moon
- Department of Neurology, Ajou University School of Medicine, Suwon, Republic of Korea.
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107
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Jung KT, Kim HJ, Bae HS, Lee HY, Kim SH, So KY, Lim KJ, Yu BS, Jung JD, An TH, Park HC. Effects of lidocaine, ketamine, and remifentanil on withdrawal response of rocuronium. Korean J Anesthesiol 2014; 67:175-80. [PMID: 25302093 PMCID: PMC4188762 DOI: 10.4097/kjae.2014.67.3.175] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Revised: 05/09/2014] [Accepted: 06/05/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Rocuronium has been well known to produce withdrawal response in 50-80% patients when administered intravenously. Several drugs are administered prior injection of rocuronium to prevent the withdrawal response. We compared the preventive effect of lidocaine, ketamine, and remifentanil on the withdrawal response of rocuronium. METHODS A total of 120 patients undergoing various elective surgeries were enrolled. Patients were allocated into 4 groups according to the pretreatment drugs (Group N, normal saline; Groups L, lidocaine 40 mg; Group K, ketamine 0.5 mg/kg; Group R, remifentanil 1 µg/kg). Patients received drugs prepared by dilution to 3 ml volume before injection of rocuronium. Withdrawal responses after injection of rocuronium were graded on a 4-point scale. Hemodynamic changes were observed before and after administration of pretreatment drugs and after endotracheal intubation. RESULTS Incidence of withdrawal response was significantly lower in group L (20%), group K (30%), and group R (0%), than group N (87%). Severe withdrawal response was observed in 5 of the 30 patients (17%) in group L, and in 9 of the 30 patients (30%) in group K. There was no severe withdrawal response in group R. Mean blood pressure and heart rate were significantly decreased in group R compared to other groups. CONCLUSIONS It seems that remifentanil (1 µg/kg intravenously) was the strongest and most effective in prevention of withdrawal response after rocuronium injection among the 3 drugs.
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Affiliation(s)
- Ki Tae Jung
- Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea. ; Department of Anesthesiology and Pain Medicine, Chosun University Hospital, Gwangju, Korea
| | - Hye Ji Kim
- Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea
| | - Hyo Sung Bae
- Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea
| | - Hyun Young Lee
- Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea. ; Department of Anesthesiology and Pain Medicine, Chosun University Hospital, Gwangju, Korea
| | - Sang Hun Kim
- Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea. ; Department of Anesthesiology and Pain Medicine, Chosun University Hospital, Gwangju, Korea
| | - Keum Young So
- Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea. ; Department of Anesthesiology and Pain Medicine, Chosun University Hospital, Gwangju, Korea
| | - Kyung Jun Lim
- Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea. ; Department of Anesthesiology and Pain Medicine, Chosun University Hospital, Gwangju, Korea
| | - Byung Sik Yu
- Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea. ; Department of Anesthesiology and Pain Medicine, Chosun University Hospital, Gwangju, Korea
| | - Jong Dal Jung
- Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea. ; Department of Anesthesiology and Pain Medicine, Chosun University Hospital, Gwangju, Korea
| | - Tae Hun An
- Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea. ; Department of Anesthesiology and Pain Medicine, Chosun University Hospital, Gwangju, Korea
| | - Hong Chan Park
- Department of Anesthesiology and Pain Medicine, Kwangju Christian Hospital, Gwangju, Korea
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108
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Affiliation(s)
- P Y Tiew
- Department of Dermatology, Singapore General Hospital, Singapore, Singapore
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109
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Lee HY, Lim YL, Thirumoorthy T, Pang SM. The role of intravenous immunoglobulin in toxic epidermal necrolysis: a retrospective analysis of 64 patients managed in a specialized centre. Br J Dermatol 2014; 169:1304-9. [PMID: 24007192 DOI: 10.1111/bjd.12607] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/22/2013] [Indexed: 01/01/2023]
Abstract
BACKGROUND Toxic epidermal necrolysis (TEN) is a severe cutaneous adverse drug reaction with a mortality of 40%. Intravenous immunoglobulin (IVIg) is widely used as a specific treatment for this reaction, although evidence of its benefit is conflicting. OBJECTIVES We sought to evaluate whether the use of IVIg improved mortality in patients with Stevens-Johnson syndrome (SJS)/TEN overlap and TEN. METHODS We retrospectively analysed data for 64 patients with SJS/TEN overlap and TEN who were treated with IVIg at a single referral centre. The primary outcome analysed was in-hospital mortality. Predicted mortality was calculated based on severity-of-illness score for TEN (SCORTEN) values. Secondary analyses of survival based on IVIg dosages and prior corticosteroid exposure were also performed. RESULTS There were 28 cases of SJS/TEN overlap and 36 cases of TEN, with a mean SCORTEN value of 2·6. The mean dose of IVIg given was 2·4 g kg(-1) and the mean delay from the onset of epidermal detachment to administration of IVIg was 3·2 days. There were 20 deaths (31%) in our cohort. The standardized mortality rate was 1·10 (95% confidence interval 0·62-1·58). Subgroup analysis comparing survivors and nonsurvivors showed a higher SCORTEN in nonsurvivors (3·4 vs. 2·2). There were no differences with regard to the dosage, delay and duration of IVIg administration. When stratified according to dosage, there was no mortality difference between patients who receive high-dose (≥ 3 g kg(-1) ) vs. low-dose (< 3 g kg(-1) ) IVIg. CONCLUSIONS This study shows that the use of IVIg does not yield survival benefits in SJS/TEN overlap and TEN, even when corrected for IVIg dosages.
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Affiliation(s)
- H Y Lee
- Department of Dermatology, Singapore General Hospital, Outram Road, Singapore, 169608
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Kim JH, Park CH, Perez RA, Lee HY, Jang JH, Lee HH, Wall IB, Shi S, Kim HW. Advanced biomatrix designs for regenerative therapy of periodontal tissues. J Dent Res 2014; 93:1203-11. [PMID: 25139364 DOI: 10.1177/0022034514540682] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Periodontitis is an inflammatory disease that causes loss of the tooth-supporting apparatus, including periodontal ligament, cementum, and alveolar bone. A broad range of treatment options is currently available to restore the structure and function of the periodontal tissues. A regenerative approach, among others, is now considered the most promising paradigm for this purpose, harnessing the unique properties of stem cells. How to make full use of the body's innate regenerative capacity is thus a key issue. While stem cells and bioactive factors are essential components in the regenerative processes, matrices play pivotal roles in recapitulating stem cell functions and potentiating therapeutic actions of bioactive molecules. Moreover, the positions of appropriate bioactive matrices relative to the injury site may stimulate the innate regenerative stem cell populations, removing the need to deliver cells that have been manipulated outside of the body. In this topical review, we update views on advanced designs of biomatrices-including mimicking of the native extracellular matrix, providing mechanical stimulation, activating cell-driven matrices, and delivering bioactive factors in a controllable manner-which are ultimately useful for the regenerative therapy of periodontal tissues.
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Affiliation(s)
- J H Kim
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, Republic of Korea Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 330-714, Republic of Korea
| | - C H Park
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, Republic of Korea Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 330-714, Republic of Korea
| | - R A Perez
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, Republic of Korea Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 330-714, Republic of Korea
| | - H Y Lee
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, Republic of Korea Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 330-714, Republic of Korea
| | - J H Jang
- Department of Biochemistry, Inha University School of Medicine, Incheon 400-712, Republic of Korea
| | - H H Lee
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 330-714, Republic of Korea Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan 330-714, Republic of Korea
| | - I B Wall
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, Republic of Korea Department of Biochemical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom
| | - S Shi
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, Republic of Korea Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, Los Angeles, CA, USA
| | - H W Kim
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, Republic of Korea Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 330-714, Republic of Korea Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan 330-714, Republic of Korea
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Choi BH, Lee KT, Lee HJ, Jang GW, Lee HY, Cho BW, Han JY, Kim TH. Detection of quantitative trait Loci affecting fat deposition traits in pigs. Asian-Australas J Anim Sci 2014; 25:1507-10. [PMID: 25049509 PMCID: PMC4093036 DOI: 10.5713/ajas.2012.12116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2012] [Revised: 05/11/2012] [Accepted: 04/20/2012] [Indexed: 11/27/2022]
Abstract
Quantitative trait loci (QTL) associated with fat deposition traits in pigs are important gene positions in a chromosome that influence meat quality of pork. For QTL study, a three generation resource population was constructed from a cross between Korean native boars and Landrace sows. A total of 240 F2 animals from intercross of F1 were produced. 80 microsatellite markers covering chromosomes 1 to 10 were selected to genotype the resource population. Intervals between adjacent markers were approximately 19 cM. Linkage analysis was performed using CRIMAP software version 2.4 with a FIXED option to obtain the map distances. For QTL analysis, the public web-based software, QTL express (http://www.qtl.cap.ed.ac.uk) was used. Two significant and two suggestive QTL were identified on SSC 6, 7, and 8 as affecting body fat and IMF traits. For QTL affecting IMF, the most significant association was detected between marker sw71 and sw1881 on SSC 6, and a suggestive QTL was identified between sw268 and sw205 on SSC8. These QTL accounted for 26.58% and 12.31% of the phenotypic variance, respectively. A significant QTL affecting IMF was detected at position 105 cM between markers sw71 and sw1881 on SSC 6.
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Affiliation(s)
- B H Choi
- Pusan National University, Miryang 627-706, Gyeongnam, Korea
| | - K T Lee
- Pusan National University, Miryang 627-706, Gyeongnam, Korea
| | - H J Lee
- Pusan National University, Miryang 627-706, Gyeongnam, Korea
| | - G W Jang
- Pusan National University, Miryang 627-706, Gyeongnam, Korea
| | - H Y Lee
- Pusan National University, Miryang 627-706, Gyeongnam, Korea
| | - B W Cho
- Pusan National University, Miryang 627-706, Gyeongnam, Korea
| | - J Y Han
- Seoul National University, Seoul 151-742, Korea
| | - T H Kim
- Pusan National University, Miryang 627-706, Gyeongnam, Korea
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112
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Jung KT, Kim SH, Lee HY, Jung JD, Yu BS, Lim KJ, So KY, Lee JY, An TH. Effect on thermoregulatory responses in patients undergoing a tympanoplasty in accordance to the anesthetic techniques during PEEP: a comparison between inhalation anesthesia with desflurane and TIVA. Korean J Anesthesiol 2014; 67:32-7. [PMID: 25097736 PMCID: PMC4121491 DOI: 10.4097/kjae.2014.67.1.32] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Revised: 01/06/2014] [Accepted: 01/09/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND It has been known that positive end-expiratory pressure (PEEP) increases the vasoconstriction threshold by baroreceptor unloading. We compared the effect on the thermoregulatory responses according to anesthetic techniques between an inhalation anesthesia with desflurane and a total intravenous anesthesia (TIVA) with propofol and reminfentanil when PEEP was applied in patients undergoing tympanoplasty. METHODS Forty-six patients with a scheduled tympanoplasty were enrolled and the patients were divided in two study groups. Desflurane was used as an inhalation anesthetic in group 1 (n = 22), while TIVA with propofol and remifentanil was used in group 2 (n = 24). PEEP was applied by 5 cmH2O in both groups and an ambient temperature was maintained at 22-24℃ during surgery. The core temperature and the difference of skin temperature between forearm and fingertip were monitored for about 180 minutes before and after the induction of general anesthesia. RESULTS The final core temperature was significantly higher in group 2 (35.4 ± 0.7℃) than in group 1 (34.9 ± 0.5℃). Peripheral thermoregulatory vasoconstriction was found in 5 subjects (23%) in group 1 and in 21 subjects (88%) in group 2. The time taken for reaching the thermoregulatory vasoconstriction threshold was 151.4 ± 19.7 minutes in group 1 and 88.9 ± 14.4 minutes in group 2. CONCLUSIONS When PEEP will be applied, anesthesia with TIVA may have more advantages in core temperature preservation than an inhalation anesthesia with desflurane.
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Affiliation(s)
- Ki Tae Jung
- Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea
| | - Sang Hun Kim
- Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea
| | - Hyun Young Lee
- Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea
| | - Jong Dal Jung
- Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea
| | - Byung Sik Yu
- Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea
| | - Kyung Joon Lim
- Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea
| | - Keum Young So
- Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea
| | - Ju Young Lee
- Department of Anesthesiology and Pain Medicine, Chosun University Hospital, Gwangju, Korea
| | - Tae Hun An
- Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea
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Abstract
Ovalbumin, ovotransferrin, ovomucin, and lysozyme are a few of the egg white proteins that can be used as functional components. The objective of this study was to develop a simple, sequential separation method for multiple proteins from egg white. Separated proteins are targeted for human use, and thus any toxic compounds were excluded. The methods for individual components and the sequential separation were practiced in laboratory scale first, and then tested for scale-up. Lysozyme was separated first using FPC3500 cation exchange resin and then ovomucin using isoelectric precipitation. Ovalbumin and ovotransferrin were separated from the lysozyme- and ovomucin-free egg white by precipitating ovotransferrin first using 5.0% (wt/vol) (NH4)2SO4 and 2.5% (wt/vol) citric acid combination. After centrifugation, the supernatant (S1) was used for ovalbumin separation and the precipitant was dissolved in water, and reprecipitated using 2.0% ammonium sulfate (wt/vol) and 1.5% citric acid (wt/vol) combination. The precipitant was used as ovotransferrin fraction, and the supernatant (S2) was pooled with the first supernatant (S1), desalted using ultrafiltration, and then heat-treated to remove impurities. The yield of ovomucin and ovalbumen was >98% and that of ovotransferrin and lysozyme was >82% for both laboratory and scale-up preparations. The SDS-PAGE and western blotting of the separated proteins, except for ovomucin, showed >90% purity. The ELISA results indicated that the activities of separated ovalbumin, ovotransferrin, and lysozyme were >96%. The protocol separated 4 major proteins in sequence, and the method was simple and easily scaled up.
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Affiliation(s)
- E D N S Abeyrathne
- WCU Biomodulation Major, Department of Agricultural Biotechnology, College of Agriculture and Life Science, Seoul National University, Seoul 151-742, Korea
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Lim TS, Choi JY, Park SA, Youn YC, Lee HY, Kim BG, Joo IS, Huh K, Moon SY. Evaluation of coexistence of Alzheimer's disease in idiopathic normal pressure hydrocephalus using ELISA analyses for CSF biomarkers. BMC Neurol 2014; 14:66. [PMID: 24690253 PMCID: PMC3976174 DOI: 10.1186/1471-2377-14-66] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Accepted: 03/28/2014] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND We investigated levels of the β-amyloid 1-42 (Aβ42), total tau protein (T-tau) and tau phosphorylated at position threonine 181 (P-tau) in cerebrospinal fluid (CSF) of idiopathic normal pressure hydrocephalus (iNPH) patients and tried to find their clinical implications in the evaluation and treatment of iNPH. METHOD Twenty-five possible iNPH patients were prospectively enrolled and their CSF was collected to analyze levels of Aβ42, T-tau and P-tau using ELISA method. Gait disturbance, urinary incontinence, and cognitive impairment were semi-quantified and detailed neuropsychological (NP) test was performed. RESULT Eight iNPH patients were classified into the lower CSF Aβ42 group and 17 patients were classified into the higher CSF Aβ42 group. There was no difference in the iNPH grading score and its improvement after LP between the two groups. The lower CSF Aβ42 group showed more deficits in attention, visuospatial function and verbal memory in the baseline NP test and less improvement in phonemic categorical naming and frontal inhibitory function after LP. CONCLUSIONS Our study suggested that concomitant AD in iNPH patients might contribute to lumbar puncture or shunt unresponsiveness, especially in the field of cognitive dysfunction.
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Affiliation(s)
| | | | | | | | | | | | | | | | - So Young Moon
- Department of Neurology, School of Medicine, AjouUniversity, 5 San, Woncheon-dong, Yongtong-gu, Suwon-si, Kyunggi-do 442-749, Republic of Korea.
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Naseer MI, Ullah I, Narasimhan ML, Lee HY, Bressan RA, Yoon GH, Yun DJ, Kim MO. Neuroprotective effect of osmotin against ethanol-induced apoptotic neurodegeneration in the developing rat brain. Cell Death Dis 2014; 5:e1150. [PMID: 24675468 PMCID: PMC3973231 DOI: 10.1038/cddis.2014.53] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 12/25/2013] [Accepted: 01/13/2014] [Indexed: 01/07/2023]
Abstract
Fetal alcohol syndrome is a neurological and developmental disorder caused by exposure of developing brain to ethanol. Administration of osmotin to rat pups reduced ethanol-induced apoptosis in cortical and hippocampal neurons. Osmotin, a plant protein, mitigated the ethanol-induced increases in cytochrome c, cleaved caspase-3, and PARP-1. Osmotin and ethanol reduced ethanol neurotoxicity both in vivo and in vitro by reducing the protein levels of cleaved caspase-3, intracellular [Ca2+]cyt, and mitochondrial transmembrane potential collapse, and also upregulated antiapoptotic Bcl-2 protein. Osmotin is a homolog of adiponectin, and it controls energy metabolism via phosphorylation. Adiponectin can protect hippocampal neurons against ethanol-induced apoptosis. Abrogation of signaling via receptors AdipoR1 or AdipoR2, by transfection with siRNAs, reduced the ability of osmotin and adiponectin to protect neurons against ethanol-induced neurodegeneration. Metformin, an activator of AMPK (adenosine monophosphate-activated protein kinase), increased whereas Compound C, an inhibitor of AMPK pathway, reduced the ability of osmotin and adiponectin to protect against ethanol-induced apoptosis. Osmotin exerted its neuroprotection via Bcl-2 family proteins and activation of AMPK signaling pathway. Modulation of AMPK pathways by osmotin, adiponectin, and metformin hold promise as a preventive therapy for fetal alcohol syndrome.
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Affiliation(s)
- M I Naseer
- 1] Department of Biology, College of Natural Sciences (RINS) and Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju 660-701, Republic of Korea [2] Center of Excellence in Genomic Medicine and Research (CEGMR) King Abdulaziz University, PO Box 80216, Jeddah 21589, Saudi Arabia
| | - I Ullah
- Department of Biology, College of Natural Sciences (RINS) and Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - M L Narasimhan
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN 47907-2010, USA
| | - H Y Lee
- Department of Biology, College of Natural Sciences (RINS) and Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - R A Bressan
- 1] Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN 47907-2010, USA [2] Department of Biochemistry and Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - G H Yoon
- Department of Biology, College of Natural Sciences (RINS) and Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - D J Yun
- Department of Biochemistry and Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - M O Kim
- Department of Biology, College of Natural Sciences (RINS) and Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju 660-701, Republic of Korea
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Abeyrathne EDNS, Lee HY, Ahn DU. Egg white proteins and their potential use in food processing or as nutraceutical and pharmaceutical agents--a review. Poult Sci 2014; 92:3292-9. [PMID: 24235241 DOI: 10.3382/ps.2013-03391] [Citation(s) in RCA: 224] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Egg white contains many functionally important proteins. Ovalbumin (54%), ovotransferrin (12%), ovomucoid (11%), ovomucin (3.5%), and lysozyme (3.5%) are among the major proteins that have high potentials for industrial applications if separated. The separation methods for these proteins from egg white have been developed since early 1900, but preparation methods of these proteins for commercial applications are still under development. Simplicity and scalability of the methods, use of nontoxic chemicals for the separation, and sequential separation for multiple proteins are very important criteria for the commercial production and application of these proteins. The separated proteins can be used in food and pharmaceutical industry as is or after modifications with enzymes. Ovotransferrin is used as a metal transporter, antimicrobial, or anticancer agent, whereas lysozyme is mainly used as a food preservative. Ovalbumin is widely used as a nutrient supplement and ovomucin as a tumor suppression agent. Ovomucoid is the major egg allergen but can inhibit the growth of tumors, and thus can be used as an anticancer agent. Hydrolyzed peptides from these proteins showed very good angiotensin I converting enzyme inhibitory, anticancer, metal binding, and antioxidant activities. Therefore, separation of egg white proteins and the productions of bioactive peptides from egg white proteins are emerging areas with many new applications.
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Affiliation(s)
- E D N S Abeyrathne
- WCU Biomodulation Major, Department of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-742, Korea; and
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Cho JH, Park CW, Lee HY, Won MH, Lee JY, Chung DJ. Effect of transient cerebral ischemia on the expression of receptor for advanced glycation end products in the gerbil hippocampus proper. Crit Care 2014. [PMCID: PMC4069828 DOI: 10.1186/cc13646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Lee HY, Jung SP, Kim S, Kim HY, Bae JW, Lee JB. Abstract P1-08-22: The impact of obesity on response to neoadjuvant chemotherapy in operable breast cancer patients. Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p1-08-22] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background
The association between obesity and response to neoadjuvant chemotherapy in breast cancer patients is not clear. We evaluated the impact of obesity on response to neoadjuvant chemotherapy in patients with operable breast cancer.
Methods
From May 2008 to December 2010, 104 patients were diagnosed with invasive breast cancer at Korea University Anam Hospital and received neoadjuvant chemotherapy before surgery. Patients were classified into those of normal (BMI of 18.5 to <25kg/m2), overweight (BMI of 25 to <30kg/m2), or Obese (BMI≥30kg/m2). The association between body mass index and pathologic response (pathologic complete response(pCR) and pathologic partial response(pPR)) to neoadjuvant chemotherapy was examined using logistic regression.
Results
Median age was 45 years. Mean BMI was 24.8 kg/m2; 53.8% had a normal BMI, 35.6% overweight, and 10.6% of patients was obese. BMI did not show a significant association with ER status, PR status, HER-2 status, lymph node involvement and neoadjuvant chemotherapy regimen. In univariate analysis, overweight and obese patients were significantly less likely to have a pCR compared with normal weight patients (odds ratio [OR] = 0.300; 95% CI, 0.115 to 0.784; p = 0.010). In multivariate analysis, ER negativity was significantly associated with a pCR and pPR to neoadjuvant chemotherapy (OR = 2.987; 95% CI, 1.128 to 7.907; p = 0.028), And there was significant difference in pCR for overweight and obese compared with normal weight patients (OR = 0.304;95% CI, 0.115 to 0.803; p = 0.016).
Conclusion
This study suggests that higher BMI should be considered to be a factor of worse response to neoadjuvant chemotherapy in patients with operable breast cancer.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P1-08-22.
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Affiliation(s)
- HY Lee
- Korea University Hospital, Korea University College of Medicine, Seoul, Korea
| | - SP Jung
- Korea University Hospital, Korea University College of Medicine, Seoul, Korea
| | - S Kim
- Korea University Hospital, Korea University College of Medicine, Seoul, Korea
| | - HY Kim
- Korea University Hospital, Korea University College of Medicine, Seoul, Korea
| | - JW Bae
- Korea University Hospital, Korea University College of Medicine, Seoul, Korea
| | - JB Lee
- Korea University Hospital, Korea University College of Medicine, Seoul, Korea
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Jung KT, Lee HY, Yoon MH, Lim KJ. The effect of urinary trypsin inhibitor against neuropathic pain in rat models. Korean J Pain 2013; 26:356-60. [PMID: 24156001 PMCID: PMC3800707 DOI: 10.3344/kjp.2013.26.4.356] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Revised: 09/17/2013] [Accepted: 09/21/2013] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND Nerve injury sometimes leads to chronic neuropathic pain associated with neuroinflammation in the nervous system. In the case of chronic neuropathic pain, the inflammatory and algesic mediators become predominant and result in pain hypersensitivity following nervous system damage. It is well known that urinary trypsin inhibitor (ulinastatin, UTI) has an anti-inflammatory activity. Recently, the neuroprotective action of UTI on the nervous system after ischemic injury has been reported. Thus, we evaluated the neuroprotective effect of ulinastatin in a rat model of neuropathic pain. METHODS Neuropathic pain was induced with L5 spinal nerve ligation (SNL) in male Sprague-Dawley rats weighing 100-120 g. The rats were divided into 3 groups, with n = 8 in each group. The rats in the control group (group 1) were administered normal saline and those in group 2 were administered UTI (50,000 U/kg) intravenously through the tail vein for 3 days from the day of SNL. Rats in group 3 were administered UTI (50,000 U/kg) intravenously from the 5(th) day after SNL. The paw withdrawal threshold was measured using the von Frey test for 3 days starting from the 5(th) day after SNL. RESULTS The paw withdrawal thresholds were significantly increased in the rats of group 2 compared to the other groups (P < 0.05). CONCLUSIONS Ulinastatin, which was administered for 3 days after SNL, increased the paw withdrawal threshold and it could have a neuroprotective effect in the rat model of neuropathic pain.
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Affiliation(s)
- Ki Tae Jung
- Department of Anesthesiology and Pain Medicine, Chosun University School of Medicine, Gwangju, Korea
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Affiliation(s)
- Ji Dae Kim
- Department of Radiology; Ajou University School of Medicine; Suwon Korea
| | - Jae Ik Bae
- Department of Radiology; Ajou University School of Medicine; Suwon Korea
| | - Je Hwan Won
- Department of Radiology; Ajou University School of Medicine; Suwon Korea
| | - Jong Hoon Lee
- Department of Surgery; Ajou University School of Medicine; Suwon Korea
| | - Chang-Kwon Oh
- Department of Surgery; Ajou University School of Medicine; Suwon Korea
| | - Hyuna Jung
- Department of Surgery; Ajou University School of Medicine; Suwon Korea
| | - Hyun Young Lee
- Clinical Trial Center; Ajou University School of Medicine; Suwon Korea
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Lee HY, Kim ES, Lee YJ, Ha YJ, Cho KB, Park KS. Fatal outcome following gastric endoscopic submucosal dissection in a patient with liver cirrhosis. Endoscopy 2013; 44 Suppl 2 UCTN:E431-2. [PMID: 23258489 DOI: 10.1055/s-0032-1325858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- H Y Lee
- Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
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Yoon SH, Lee HY, Lee HJ, Kwack KS. Optimal dose of intra-articular corticosteroids for adhesive capsulitis: a randomized, triple-blind, placebo-controlled trial. Am J Sports Med 2013; 41:1133-9. [PMID: 23507791 DOI: 10.1177/0363546513480475] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Intra-articular corticosteroid injection is a commonly used therapy for adhesive capsulitis, but there are only few studies that compare the efficacy of corticosteroids according to different doses. PURPOSE To determine whether intra-articular injections with a high-dose corticosteroid improves pain and function in patients with adhesive capsulitis better than a low dose or a placebo. STUDY DESIGN Randomized controlled clinical trial; Level of evidence, 1. METHODS Participants (n = 53) with primary adhesive capsulitis in the freezing stage were randomly assigned to receive ultrasound-guided intra-articular injections with 40 mg triamcinolone acetonide (high-dose group, n = 20), 20 mg triamcinolone acetonide (low-dose group, n = 20), or placebo (n = 13). After a single injection, participants were all instructed to carry out a home exercise program. The outcome measures included the Shoulder Pain and Disability Index (SPADI), visual analog scale (VAS) for average shoulder pain level, and passive range of motion including flexion, abduction, extension, external rotation, and internal rotation before treatment and at weeks 1, 3, 6, and 12 after treatment. RESULTS There were no significant differences in demographic and clinical characteristics at baseline between the 3 groups. Repeated-measures analysis of variance and post hoc tests showed improvement in SPADI and VAS scores and in flexion, abduction, and internal rotation especially for the low- and high-dose groups compared with the placebo. Yet, no significant difference was found between the 2 different corticosteroid dose groups. CONCLUSION We assessed the efficacy of corticosteroid injections according to 2 different doses that are most widely used in intra-articular injections for adhesive capsulitis. This study shows that there were no significant differences between the high- and low-dose corticosteroid groups, indicating the preferred use of a low dose in the initial stage.
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Affiliation(s)
- Seung-Hyun Yoon
- Department of Physical Medicine and Rehabilitation, Ajou University Medical Center, Worldcup-ro, Yeongtong-gu, Suwon 443-721, South Korea.
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Lee HY, Seong MW, Park SS, Hwang SS, Lee J, Park YS, Lee CH, Lee SM, Yoo CG, Kim YW, Han SK, Yim JJ. Diagnostic accuracy of Xpert® MTB/RIF on bronchoscopy specimens in patients with suspected pulmonary tuberculosis. Int J Tuberc Lung Dis 2013; 17:917-21. [PMID: 23621953 DOI: 10.5588/ijtld.12.0885] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE To determine the diagnostic accuracy of the Xpert® MTB/RIF assay using samples obtained through bronchoscopy in patients with suspected pulmonary tuberculosis (PTB). DESIGN We retrospectively reviewed the records of patients with suspected PTB for whom the Xpert MTB/RIF assay was performed on bronchoscopy specimens. The sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) for the diagnosis of active PTB were calculated for acid-fast bacilli (AFB) smear microscopy and the Xpert assay using culture of Mycobacterium tuberculosis from sputum or bronchoscopy specimens as a reference standard. RESULTS A total of 132 patients were included in the final analysis. Of these, 38 had culture-confirmed PTB. The sensitivity of the Xpert assay using bronchial washing or bronchoalveolar lavage (BAL) fluid for the diagnosis of PTB was 81.6%, and specificity was 100%. The PPV and NPV were 100% and 92.1%, respectively. The sensitivity and specificity of AFB smear microscopy were respectively 13.2% and 98.8%. CONCLUSION The Xpert assay on bronchoscopy specimens provided an accurate diagnosis of PTB in patients who had a negative AFB smear or who could not produce sputum.
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Affiliation(s)
- H Y Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine and Lung Institute, Seoul National University College of Medicine, Seoul, Republic of Korea
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Lee HY, Heo YT, Lee SE, Hwang KC, Lee HG, Choi SH, Kim NH. Short communication: retinoic acid plus prolactin to synergistically increase specific casein gene expression in MAC-T cells. J Dairy Sci 2013; 96:3835-9. [PMID: 23587393 DOI: 10.3168/jds.2012-5945] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2012] [Accepted: 02/26/2013] [Indexed: 11/19/2022]
Abstract
Mammary alveolar (MAC-T) cells, an established bovine mammary epithelial cell line, are frequently used to investigate differentiation. A lactogenic phenotype in these cells is induced by treatment with a combination of hydrocortisone, insulin, and prolactin (PRL). The effect of the vitamin A derivative retinoic acid (RA), which induces differentiation in many cells, has not been studied in MAC-T cells. The objective of this study was to evaluate the differentiation potential of RA (1 μM) in MAC-T cells and to examine the effect of combined treatment with RA (1 μM) and PRL (5 μg/mL). Although RA treatment alone inhibited MAC-T cell proliferation, co-treatment of RA with PRL increased cell growth compared with the control group (treated with 1 μg/mL hydrocortisone and 5 μg/mL insulin). The ratio of Bcl to Bax mRNA was decreased in the RA treatment compared with RA+PRL or control. Retinoic acid-induced differentiation of MAC-T cells was associated with an increase in the mRNA expression of αS1-casein (3.9-fold), αS2-casein (4.5-fold), and β-casein (4.4-fold) compared with the control group. Expression of αS1-casein, αS2-casein, and β-casein was increased 12.9-fold, 11.9-fold, and 19.3-fold, respectively, following treatment with RA and PRL combined compared with the control group. These results demonstrate that RA induces differentiation of MAC-T cells and acts synergistically with PRL to increase specific casein gene expression.
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Affiliation(s)
- H Y Lee
- Department of Animal Science, Chungbuk National University, Chungbuk 361-763, Republic of Korea
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Jung KT, Yoon MH, Lee HY, Yu BY, Kim DK, Lim KJ. Effects of Palonosetron, a 5-HT3 Receptor Antagonist, on Mechanical Allodynia in a Rat Model of Postoperative Pain. Korean J Pain 2013; 26:125-9. [PMID: 23614072 PMCID: PMC3629337 DOI: 10.3344/kjp.2013.26.2.125] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Revised: 12/28/2012] [Accepted: 01/02/2013] [Indexed: 11/07/2022] Open
Abstract
Background 5-hydroxytryptamine 3 (5-HT3) receptors have been known to be associated with the modulation of nociceptive transmission. However, it is uncertain whether 5-HT3 plays a role in the antinociceptive or pronociceptive pathway for incisional pain. In this study, we evaluated the effects of palonosetron, a 5-HT3 receptor antagonist, on incisional pain in rats when administered intrathecally or intraplantarly. Methods An intrathecal catheter was implanted through the cisterna magna and placed in the intrathecal space of rats. An incision in the plantaris muscle of the right hind paw was done under anesthesia with sevoflurane. Withdrawal thresholds were evaluated with the von Frey filament after 2 hours. Palonosetron (0.5 and 0.1 µg intrathecally; 0.5 µg intraplantarly) was administered and the thresholds were observed for 4 hours. Results Mechanical hypersensitivity developed after the incision. Intrathecal palonosetron (0.5 µg and 0.1 µg) did not alter the paw withdrawal threshold. Intraplantar palonosetron (0.5 µg) also did not change the paw withdrawal threshold. Conclusions Intrathecal and intraplantar palonosetron (0.5 µg) had no effect on modulating the mechanical hypersensitivity in the incisional pain model of rats.
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Affiliation(s)
- Ki Tae Jung
- Department of Anesthesiology and Pain Medicine, School of Medicine, Chosun University, Gwangju, Korea
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Park CW, Lee HY, Cho JH, Won MH. Differences of calcium binding protein immunoreactivities in the young hippocampal CA1 region from the adult following transient ischemic damage. Crit Care 2013. [PMCID: PMC3642642 DOI: 10.1186/cc12256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
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Lee HY, Chai LC, Pui CF, Mustafa S, Cheah YK, Nishibuchi M, Radu S. Formation of biofilm by Listeria monocytogenes ATCC 19112 at different incubation temperatures and concentrations of sodium chloride. Braz J Microbiol 2013; 44:51-5. [PMID: 24159283 PMCID: PMC3804177 DOI: 10.1590/s1517-83822013005000004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2010] [Accepted: 09/30/2012] [Indexed: 12/04/2022] Open
Abstract
Biofilm formation can lead to various consequences in the food processing line such as contamination and equipment breakdowns. Since formation of biofilm can occur in various conditions; this study was carried out using L. monocytogenes ATCC 19112 and its biofilm formation ability tested under various concentrations of sodium chloride and temperatures. Cultures of L. monocytogenes ATCC 19112 were placed in 96-well microtitre plate containing concentration of sodium chloride from 1–10% (w/v) and incubated at different temperature of 4 °C, 30 °C and 45 °C for up to 60 h. Absorbance reading of crystal violet staining showed the density of biofilm formed in the 96-well microtitre plates was significantly higher when incubated in 4 °C. The formation of biofilm also occurs at a faster rate at 4 °C and higher optical density (OD 570 nm) was observed at 45 °C. This shows that storage under formation of biofilm that may lead to a higher contamination along the processing line in the food industry. Formation of biofilm was found to be more dependent on temperature compared to sodium chloride stress.
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Affiliation(s)
- H Y Lee
- Centre of Excellence for Food Safety Research, Faculty of Food Science and Technology, Universiti Putra Malaysia, Serdang, Selangor Darul Ehsan, Malaysia. ; Department of Molecular and Cellular Biology, Faculty of Biotechnology and Biomolecular Science, Universiti Putra Malaysia, Serdang, Selangor Darul Ehsan
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Bhandary B, Lee HY, Back HI, Park SH, Kim MG, Kwon JW, Song JY, Lee HK, Kim HR, Chae SW, Chae HJ. Immature Rubus coreanus Shows a Free Radical-Scavenging Effect and Inhibits Cholesterol Synthesis and Secretion in Liver Cells. Indian J Pharm Sci 2013; 74:211-6. [PMID: 23440938 PMCID: PMC3574530 DOI: 10.4103/0250-474x.106062] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Revised: 05/16/2012] [Accepted: 05/20/2012] [Indexed: 11/12/2022] Open
Abstract
Rubus coreanus fruits have been employed as a traditional medicine for centuries in the Asia-Pacific region. Its pharmacological action differs according to the different extraction methods utilized and the degree of fruit ripening. In this study, we determined the cellular effect of different ethanol extracts of mature and immature Rubus coreanus fruits in human hepatic cell line, HepG2 cells. The antioxidant activity, effect on superoxide dismutase activity and cholesterol biosynthesis efficiency was also evaluated. Immature Rubus coreanus extract showed higher antioxidant capability, compared with that of its mature fractions. Cellular antioxidant proteins including HO-1, Cu/Zn-superoxide dismutase and catalase were highly expressed in the presence of Rubus coreanus. Cholesterol levels in HepG2 cells treated with the water fraction of immature Rubus coreanus were significantly reduced. This antihyperlipidaemic action of Rubus coreanus is a consequence of cholesterol biosynthesis and extracellular secretion in HepG2 cells. These results indicate that among different ethanol fraction of mature and immature Rubus coreanus fruit extracts, water extract of immature fruit extract shows higher antioxidant as well as higher antihyperlipidaemic action.
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Affiliation(s)
- B Bhandary
- Department of Pharmacology, Institute of Cardiovascular Research, College of Medicine, Chonbuk National University, Jeonju-565 701, Republic of Korea
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Lee HY, Kim HS, Park JW, Baek HJ, Kim SJ, Choi CG. Atypical imaging features of Epstein-Barr virus-positive primary central nervous system lymphomas in patients without AIDS. AJNR Am J Neuroradiol 2013; 34:1562-7. [PMID: 23413244 DOI: 10.3174/ajnr.a3429] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Recent clinical experience with EBV-positive PCNSL in patients without acquired immune deficiency syndrome showed that they tended to have atypical features seen on conventional MR imaging. The purpose of our study was to evaluate the MR imaging features of EBV-positive PCNSL in patients without AIDS and to compare these imaging findings with those of EBV-negative PCNSL. MATERIALS AND METHODS MR images were obtained in 55 consecutive patients with pathologically proved EBV-positive (n = 10) or EBV-negative (n = 45) PCNSL. We statistically analyzed the differences between the patient groups regarding the occurrence of tumor necrosis or hemorrhage and ADC, rCBVmax, rCBVr, and the Cho/NAA ratio in the tumor area. RESULTS Tumor necrosis and hemorrhage were observed in 9 (90%) and 7 (70%), respectively, of the patients with EBV-positive PCNSL; necrosis was observed in 8 (18%), and hemorrhage, in 3 (7%) patients with EBV-negative PCNSL (P < .0001 each). The necrotic core was hyperintense relative to contralateral white matter, as seen on DWI in 4 patients with EBV-positive PCNSL, though the ADC between the 2 patient groups did not differ significantly. rCBVmax, rCBVr, and the Cho/NAA ratios did not differ significantly between the 2 groups. The sensitivity and specificity of necrosis and hemorrhage for differentiating the 2 groups were 89.2% and 81.7% and 78.5% and 94.1%, respectively. CONCLUSIONS Our initial clinical experience with a small number of patients suggests that EBV-positive PCNSL in patients without AIDS tends to present with atypical MR imaging features.
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Affiliation(s)
- H Y Lee
- Department of Radiology, Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Lee HY, Dunant A, Sekula P, Mockenhaupt M, Wolkenstein P, Valeyrie-Allanore L, Naldi L, Halevy S, Roujeau JC. The role of prior corticosteroid use on the clinical course of Stevens-Johnson syndrome and toxic epidermal necrolysis: a case-control analysis of patients selected from the multinational EuroSCAR and RegiSCAR studies. Br J Dermatol 2013; 167:555-62. [PMID: 22639874 DOI: 10.1111/j.1365-2133.2012.11074.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN) are immunologically mediated, severe cutaneous adverse reactions involving cytotoxic T cells, natural killer cells and various mediators. In large studies, up to 15% of SJS/TEN occurred in patients with chronic corticosteroid use. It is unclear if this prior exposure to corticosteroids modified the disease course. OBJECTIVES To evaluate whether systemic corticosteroid usage prior to the onset of SJS/TEN modified the clinical course and outcome. If a disease-modifying effect is present, information from such an analysis may have implications on the therapeutic use of corticosteroids in SJS/TEN. METHODS This is a case-control study based on data collected in the EuroSCAR and RegiSCAR studies. Ninety-two cases of SJS/TEN with exposure to corticosteroids prior to the onset of disease, and 321 randomly selected SJS/TEN patients without prior exposure were included. Primary outcomes included progression of disease, disease severity and mortality. A secondary analysis of latency between the beginning of drug use and the onset of disease, based on exposure to a single high-risk drug, was also performed. RESULTS On multivariate analysis, cases with prior exposure to corticosteroids had a longer progression of disease by 2·2 days [95% confidence interval (CI) 1·1-3·2]. The disease severity and mortality outcome were unaffected. In addition, there is evidence that corticosteroids delayed the onset of SJS/TEN in patients with exposure to high-risk drugs by 7·1 days (CI -0·2 to 14·5). CONCLUSIONS The prior use of corticosteroids prolonged the period of disease progression without influencing the disease severity or mortality. In addition, when SJS/TEN is preceded by use of a single high-risk drug, the latency between the drug intake and the onset of SJS/TEN may also be increased. These findings suggest that corticosteroids have a mild impact on the course of SJS/TEN, and further studies are required to clarify any potential therapeutic effects.
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Affiliation(s)
- H Y Lee
- Dermatology Unit, Singapore General Hospital, Singapore, Singapore.
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Park M, Lee HY, Lee SI, Kim J, Ahn K. Positive conversion of specific IgE against house dust mite in children with atopic dermatitis under 24 months of age. Allergy Asthma Respir Dis 2013. [DOI: 10.4168/aard.2013.1.4.350] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Miran Park
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
- Environmental Health Center for Atopic Diseases, Samsung Medical Center, Seoul, Korea
| | - Hyun Young Lee
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sang-Il Lee
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
- Environmental Health Center for Atopic Diseases, Samsung Medical Center, Seoul, Korea
| | - Jihyun Kim
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
- Environmental Health Center for Atopic Diseases, Samsung Medical Center, Seoul, Korea
| | - Kangmo Ahn
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
- Environmental Health Center for Atopic Diseases, Samsung Medical Center, Seoul, Korea
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Yang JK, Park YJ, Kim KH, Lee HY, Min KC, Lee SM. Effect of co-existing copper and calcium on the removal of As(V) by reused aluminum oxides. Water Sci Technol 2013; 67:187-192. [PMID: 23128638 DOI: 10.2166/wst.2012.500] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Among the various heavy metals, arsenic is frequently found in abandoned mine drainage and the environmental fate of arsenic in real aqueous solutions can be highly dependent on the presence of co-existing ions. In this study, removal of arsenate through adsorption on the reused aluminum oxide or through precipitation was investigated in a single and in a binary system as a function of pH and concentration. Different removal behaviors of arsenate were observed in the presence of different cations as well as a variation of the molar ratios of arsenate to cations. Co-operative effects on arsenate removal by precipitation in solution occurred with an increase of copper concentration, while a decrease of arsenate removal resulted in increasing calcium concentration. It was observed that the arsenate removal in the presence of calcium would be highly dependent on the molar ratios of both elements.
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Affiliation(s)
- J K Yang
- Division of General Education, Kwangwoon University, Seoul 139-701, Korea
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133
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Lee HB, An YS, Lee HY, Hwang JH, Lee HJ, Jeong KY, Kim JW, Yim SY. Usefulness of (18)f-fluorodeoxyglucose positron emission tomography/computed tomography in management of cervical dystonia. Ann Rehabil Med 2012; 36:745-55. [PMID: 23342305 PMCID: PMC3546175 DOI: 10.5535/arm.2012.36.6.745] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Accepted: 07/11/2012] [Indexed: 12/13/2022] Open
Abstract
Objective To evaluate the usefulness of 18F-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) in the management of cervical dystonia (CD) with botulinum toxin type A (BoNT-A) injection. Method Thirty two subjects with CD were included. A BoNT-A injection was provided either by clinically targeting method (group 1) or by 18F-FDG PET/CT-assisted, clinically targeting method (group 2). In group 2, selection of target muscles and dosage of BoNT-A were determined according to the increased 18F-FDG uptake, in addition to physical examination and functional anatomy. The outcomes of BoNT-A injection was compared between the two groups, in terms of the number of subjects who had reinjection before and after 6 months, the number of reinjections, the interval of reinjections, the duration to the minimal Toronto Western Spasmodic Torticollis Rating Scale (TWSTRS), the number of adverse events, the reduction rate of TWSTRS at 1-3 months and 3-6 months after injection, and the probability of reinjection-free living. Results The number of subjects who had reinjection within 6 months was significantly lower in group 2 than in group 1 (10 in group 1 vs. 3 in group 2). The reduction rate of TWSTRS after 3-6 months (37.8±15.7% of group 1 vs. 63.3±28.0% of group 2) and the probability of reinjection-free living were significantly higher in group 2 than in group 1. Conclusion These findings suggest that 18F-FDG PET/CT study could be useful in management of CD in terms of the identification of dystonic muscles if there is an increase in the 18F-FDG uptake in the cervical muscle of the images.
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Affiliation(s)
- Han Byul Lee
- The Center for Torticollis, Department of Physical Medicine and Rehabilitation, Ajou University School of Medicine, Suwon 443-749, Korea
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Lim TS, Hong YH, Lee HY, Choi JY, Kim HS, Moon SY. Metabolite investigation in both anterior and posterior cingulate gyri in Alzheimer's disease spectrum using 3-tesla MR spectroscopy. Dement Geriatr Cogn Disord 2012; 33:149-55. [PMID: 22722669 DOI: 10.1159/000338177] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/05/2012] [Indexed: 11/19/2022] Open
Abstract
AIMS In order to evaluate the metabolite changes of both anterior and posterior cingulate gyri during the progression of Alzheimer's disease (AD) pathology, a 3-tesla MR spectroscopy study was performed. METHODS Thirty-six patients with AD, 19 patients with amnestic mild cognitive impairment (aMCI), and 23 cognitively normal (CN) subjects were recruited. MR spectroscopy was conducted within the anterior and posterior cingulate gyri. A one-way analysis of co-variance was used to compare the metabolite ratios of each group and correlation analysis was used to show the correlation between the metabolite ratios with the Mini-Mental State Examination (MMSE) and Neuropsychiatric Inventory (NPI). RESULTS The N-acetylaspartate/creatine (NAA/Cr) of the posterior cingulate gyrus was significantly higher in CN subjects than in aMCI and AD patients. On the other hand, the myoinositol/creatine (ml/Cr) of the anterior cingulate gyrus was significantly higher in AD patients than in CN subjects and aMCI patients. The ml/Cr of the posterior cingulate gyrus correlated with the MMSE and that of the anterior cingulate gyrus correlated with the NPI. CONCLUSION Both the decreased NAA/Cr of the posterior cingulate gyrus and the increased ml/Cr of the anterior cingulate gyrus may reflect biochemical changes in AD according to the posterior-dominant progression of AD pathology.
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Affiliation(s)
- Tae Sung Lim
- Department of Neurology, Ajou University School of Medicine, Suwon, Republic of Korea
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135
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Kobayashi S, Kado S, Oishi T, Ohshima S, Kagawa T, Nagae Y, Yamamoto S, Mizuuchi T, Nagasaki K, Okada H, Minami T, Estrada T, Murakami S, Lee HY, Minami T, Harada T, Nakamura Y, Konoshima S, Toushi K, Sano F. Density fluctuation measurements using beam emission spectroscopy on Heliotron J. Rev Sci Instrum 2012; 83:10D535. [PMID: 23126873 DOI: 10.1063/1.4734039] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This paper describes the measurement of the density fluctuation using beam emission spectroscopy in Heliotron J, having the non-symmetrical helical-magnetic-axis configuration. In order to optimize the sightlines, the numerical calculations are carried out to estimate the spatial resolution and the observation location. When a tangential neutral beam is used as diagnostic one, suitable sightlines from the newly installed diagnostic port are selected whose spatial resolution Δρ is less than ± 0.07 over the entire plasma region. Modification of the interference filter and the detection systems enables us to measure the radial profile of the density fluctuation. Each of the three coherent modes due to the fast-ion-driven magnetohydrodynamic instabilities has different radial structure of the density fluctuation.
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Affiliation(s)
- S Kobayashi
- Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan.
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Kim MS, Ju CI, Kim SW, Lee HY. Recurrent bacterial meningitis accompanied by a spinal intramedullary abscess. J Korean Neurosurg Soc 2012; 51:380-2. [PMID: 22949971 PMCID: PMC3424182 DOI: 10.3340/jkns.2012.51.6.380] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Revised: 03/26/2012] [Accepted: 06/12/2012] [Indexed: 11/27/2022] Open
Abstract
Bacterial meningitis is rarely complicated by an intradural spinal abscess, and recurrent meningitis is an uncommon presentation of a spinal intramedullary abscess. Here, we report a 63-year-old patient with recurrent meningitis as the first manifestation of an underlying spinal intramedullary abscess. To the best of our knowledge, no previous report has been issued on recurrent meningitis accompanied by a spinal intramedullary abscess in an adult. In this article, the pathophysiological mechanism of this uncommon entity is discussed and the relevant literature reviewed.
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Affiliation(s)
- Min Seong Kim
- Department of Dermatology, College of Medicine, Chosun University, Gwangju, Korea
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137
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Abstract
Tarlov or perineural cysts are nerve root cysts found most commonly at the sacral spine level arising between covering layers of the perineurium and the endoneurium near the dorsal root ganglion and are usually asymptomatic. Symptomatic sacral perineural cysts are uncommon but sometimes require surgical treatment. A 69-year-old male presented with pain in the buttock. He was diagnosed as having a sacral cyst with magnetic resonance imaging. For the nonoperative diagnosis and treatment, caudal peridurography and block were performed. After the treatment, the patient's symptom was relieved. We suggest a caudal peridural block is effective in relieving pain from a sacral cyst.
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Affiliation(s)
- Ki Tae Jung
- Department of Anesthesiology and Pain Medicine, School of Medicine, Chosun University, Gwangju, Korea
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138
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Kim SJ, Lim HK, Lee HY, Choi CG, Lee DH, Suh DC, Kim SM, Kim JK, Krauss B. Dual-energy CT in the evaluation of intracerebral hemorrhage of unknown origin: differentiation between tumor bleeding and pure hemorrhage. AJNR Am J Neuroradiol 2012; 33:865-72. [PMID: 22241388 DOI: 10.3174/ajnr.a2890] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Detection of underlying tumor in patients with unknown-origin acute ICH may be difficult because acute hematoma may mask enhancement of tumor on postcontrast CT. We intended to investigate the clinical utility of DECT in differentiating tumor bleeding from pure ICH. MATERIALS AND METHODS Using a dual-source CT scanner, we obtained TNC single-energy and postcontrast DECT scans for 56 patients with unknown-origin spontaneous ICH. From the 2 sets of postcontrast DECT images obtained with different tube energy, EA (equivalent to conventional postcontrast CT), VNC, color-coded iodine overlay, fusion images of iodine overlay and VNC images were produced. The diagnostic performances of fusion, EA, and combined EA and TNC images for detecting underlying tumors were compared. RESULTS Of the 56 patients, 17 had primary or metastatic tumors (18 lesions) and 39 had nontumorous ICH. The sensitivities of fusion, EA, and combined EA and TNC images for detecting brain tumors were 94.4%, 61.1%, and 66.7%, respectively, and their specificities were 97.4%, 92.3%, and 89.7%, respectively. The areas under the ROC curves were 0.964, 0.786, and 0.842, respectively. Overall, the diagnostic performance of fusion images was significantly superior to EA (P = .006) and combined EA and TNC (P = .011) images. CONCLUSIONS DECT may be useful in detecting underlying tumors in patients with unknown-origin ICH.
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Affiliation(s)
- S J Kim
- Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
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139
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Cho JH, Park CW, Lee HY, Won MH. Neuronal damage using Fluoro-Jade B histofluorescence and gliosis in the striatum after various durations of transient cerebral ischemia in gerbils. Crit Care 2012. [PMCID: PMC3363721 DOI: 10.1186/cc10910] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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140
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Lee HY, Kim SH, Jung KT, So KY. Hydrocortisone for refractory hypotension of very low birth weight infant with patent ductus arteriosus: a case report. J Anesth 2012; 26:134-5. [DOI: 10.1007/s00540-011-1259-4] [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] [Received: 07/17/2011] [Accepted: 10/03/2011] [Indexed: 10/16/2022]
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141
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Suh DC, Kim JL, Kim EH, Kim JK, Shin JH, Hyun DH, Lee HY, Lee DH, Kim JS. Carotid baroreceptor reaction after stenting in 2 locations of carotid bulb lesions of different embryologic origin. AJNR Am J Neuroradiol 2012; 33:977-81. [PMID: 22268083 DOI: 10.3174/ajnr.a2891] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The carotid bulb is innervated by the sinus nerve of Hering, a branch of the glossopharyngeal nerve, derived from the third pharyngeal arch. The aim of this study was to determine the frequency, predictors, and outcome of the carotid BR after carotid stent placement according to the location of the plaque lesion. MATERIALS AND METHODS Atherosclerotic carotid plaques of apical versus body lesions were prospectively analyzed in 95 consecutive patients who underwent carotid stent placement. Patients with hypertension after stent placement were excluded, and transient (<3 hours) and prolonged (3-24 hours) BR, together with AEs such as strokes and death, were assessed in the 2 lesion locations (apical versus body). Other factors known to affect the carotid baroreceptor were also investigated, and the results were analyzed by χ(2) or Mann-Whitney U tests. RESULTS Transient BR occurred in 30% of apical lesions in contrast to 70% of body lesions (P = .001). Transient BR showed a significant relationship to lesion location (P = .001), occurring most frequently in body lesions, and to the distance of maximum stenosis from the ICA ostium (P = .001). Hyperperfusion and AE rates (P = .076) in 1 month occurred more frequently in apical lesions. CONCLUSIONS The frequency of transient BR after carotid stent placement was lower in the apical region of the carotid bulb. Different cardiovascular disturbances after carotid stent placement can be attributed to anatomically different areas of the carotid bulb.
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Affiliation(s)
- D C Suh
- Department of Radiology, Asan Medical Center, University of Ulsan, College of Medicine, 86 Asanbyeongwon-Gil, Songpa-Gu, Seoul 138-736, Korea.
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Cho JH, Park CW, Lee HY, Won MH. Changes of ribosomal protein S3 immunoreactivity and its new expression in microglia in the mice hippocampus after lipopolysaccharide treatment. Crit Care 2012; 16. [PMCID: PMC3363720 DOI: 10.1186/cc10909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- JH Cho
- Kangwon National University, Chuncheonsi, South Korea
| | - CW Park
- Kangwon National University, Chuncheonsi, South Korea
| | - HY Lee
- Kangwon National University, Chuncheonsi, South Korea
| | - MH Won
- Kangwon National University, Chuncheonsi, South Korea
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Hong JY, Yoon SH, Moon DJ, Kwack KS, Joen B, Lee HY. Comparison of High- and Low-Dose Corticosteroid in Subacromial Injection for Periarticular Shoulder Disorder: A Randomized, Triple-Blind, Placebo-Controlled Trial. Arch Phys Med Rehabil 2011; 92:1951-60. [DOI: 10.1016/j.apmr.2011.06.033] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2011] [Revised: 06/24/2011] [Accepted: 06/29/2011] [Indexed: 11/24/2022]
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144
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Reyes KB, Lee HY, Ng I, Goh KY. Abducens (sixth) nerve palsy presenting as a rare case of isolated brainstem metastasis from a primary breast carcinoma. Singapore Med J 2011; 52:e220-e222. [PMID: 22173259] [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: 05/31/2023]
Abstract
Most isolated abducens (sixth) nerve palsies are ischaemic in nature. However, there are other causes that can mimic an abducens nerve palsy, which requires aggressive diagnostic management. A 56-year-old hypertensive woman presented with a right abduction deficit. Her past history revealed that she had undergone a mastectomy and completed a course of chemo- and radiation therapy for breast carcinoma. She was well until she develped binocular diplopia five months later. Magnetic resonance imaging showed a right pontine mass. Stereotactic biopsy was performed, and histopathology revealed a metastatic carcinoma that was compatible with an origin from the breast primary. We conclude that identifying and managing patients with metastatic lesions involves a multidisciplinary approach. Thorough history-taking and neuro-ophthalmologic evaluation would help physicians in establishing the primary differentials, which could not only be sight-saving but life-saving as well.
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Affiliation(s)
- K B Reyes
- Neuro-Ophthalmology Service, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore 308433.
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145
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Lim TS, Lee HY, Barton JJS, Moon SY. Deficits in face perception in the amnestic form of mild cognitive impairment. J Neurol Sci 2011; 309:123-7. [PMID: 21783204 DOI: 10.1016/j.jns.2011.07.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Revised: 06/28/2011] [Accepted: 07/01/2011] [Indexed: 10/18/2022]
Abstract
The fusiform gyrus is involved pathologically at an early stage of the amnestic form of mild cognitive impairment (aMCI), and is also known to be involved in the perceptual stage of face processing. We assessed face perception in patients with aMCI to determine if this cognitive skill was impaired. We compared 12 individuals (4 men) with aMCI and 12 age- and education-matched healthy controls on the ability to discriminate changes in the spatial configuration or color of the eyes or the mouth in faces. Patients with aMCI performed less quickly and accurately for all changes on trials with limited viewing duration. With unlimited duration, they could achieve normal perceptual accuracy for configural changes to the mouth, but remained impaired for changes to eye color or configuration. Patients with aMCI show deficits in face perception that are more pronounced for the highly salient ocular region, a pattern similar to that seen in acquired prosopagnosia. This form of perceptual impairment may be an early marker of additional cognitive deficits beyond memory in aMCI.
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Affiliation(s)
- Tae Sung Lim
- Department of Neurology, Ajou University School of Medicine, Suwon, Republic of Korea
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146
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Kurniawan D, Nor FM, Lee HY, Lim JY. Elastic properties of polycaprolactone at small strains are significantly affected by strain rate and temperature. Proc Inst Mech Eng H 2011; 225:1015-20. [DOI: 10.1177/0954411911413059] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Tensile tests were conducted on polycaprolactone at various strain rates and temperatures. Focusing on the mechanical properties within only the small-strain elastic region, i.e. up to the inflection point in the stress–strain diagram, it was found that strain rate and temperature had significant effects on the polymer. This finding implies that the effects of strain rate and temperature on the elastic properties of polycaprolactone should be considered in the design and manufacture of rigidity-sensitive, load-bearing applications, including use as biomaterial for scaffolds in tissue engineering applications.
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Affiliation(s)
- D Kurniawan
- Department of Mechanical, Robotics, and Energy Engineering, Dongguk University, Seoul, Korea
| | - F M Nor
- Department of Mechanical, Robotics, and Energy Engineering, Dongguk University, Seoul, Korea
| | - H Y Lee
- Department of Mechanical, Robotics, and Energy Engineering, Dongguk University, Seoul, Korea
| | - J Y Lim
- Department of Mechanical, Robotics, and Energy Engineering, Dongguk University, Seoul, Korea
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147
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Ho HH, Siu CW, Lam YM, Lee HY, Tse HF. A rare case of severe aortic stenosis with preserved ejection fraction and normal transvalvular gradient. Int J Cardiol 2011; 149:e127-8. [PMID: 19608291 DOI: 10.1016/j.ijcard.2009.06.041] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2009] [Accepted: 06/18/2009] [Indexed: 10/20/2022]
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148
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Lim PL, Ling ML, Lee HY, Koh TH, Tan AL, Kuijper EJ, Goh SS, Low BS, Ang LP, Harmanus C, Lin RT, Krishnan P, James L, Lee CE. Isolation of the first three cases of Clostridium difficile polymerase chain reaction ribotype 027 in Singapore. Singapore Med J 2011; 52:361-364. [PMID: 21633771] [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: 05/30/2023]
Abstract
INTRODUCTION The incidence of Clostridium (C.) difficile infection (CDI) was on the rise from 2001 to 2006 in Singapore. Recent unpublished data suggests that its incidence had remained stable or decreased in most local public hospitals between 2006 and 2010. It is, however, not known if the polymerase chain reaction (PCR) ribotype 027 strains have been circulating, although reports suggest that this strain is emerging in Asia, with the first cases reported from Japan in 2007, as well as in Hong Kong and Australia in 2009. We initiated a culture-based surveillance to detect this epidemic strain in Singapore. METHODS From September 2008 to December 2009, all non-duplicate toxin-positive stool samples from the three largest public hospitals in Singapore were collected for culture and further analysis. RESULTS Out of the 366 samples collected, 272 viable isolates were cultured. Of these, 240 tested toxin-positive and ten tested positive for the binary toxin gene; 35 different PCR ribotypes were found. Three isolates that tested positive for binary toxin contained the same PCR ribotyping pattern as the C. difficile 027 control strain. All three had the 18-bp deletion and single nucleotide tcdC deletion at position 117. Susceptibility testing was performed, demonstrating susceptibility to erythromycin and moxifloxacin. CONCLUSION We report the first three isolates of C. difficile 027 from Singapore. However, their susceptibility patterns are more consistent with the historical 027 strains. Rising CDI incidence may not be associated with the emergence of the epidemic 027 strain at this time.
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Affiliation(s)
- P L Lim
- Communicable Disease Division, Ministry of Health, 16 College Road, Singapore 169854.
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Abstract
Mesenteric desmoid tumour (MDT) is an uncommon neoplasm that typically presents as a solid soft-tissue mass on cross-sectional imaging. MDT manifesting as a fat-containing cystic mass on CT has not been described in the literature. We report such an unusual case with clinicopathological correlation.
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Affiliation(s)
- C H Tan
- Department of Diagnostic Radiology, Tan Tock Seng Hospital, Singapore.
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150
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Kim MK, Lee HY, Song IS, Lee JB, Kim GH, Yoo SM, Rho JY, White CS. A case of a giant mucocoele of the appendiceal stump presented with a palpable mass in the right thigh: pre-operative diagnosis based on characteristic multidetector CT findings. Br J Radiol 2011; 83:e220-3. [PMID: 20846981 DOI: 10.1259/bjr/98679856] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The pre-operative diagnosis of a mucocoele of the appendiceal stump (MAS) may be difficult owing to rarity and non-specific clinical presentation. However, a pre-operative diagnosis of a MAS is important to prevent widespread dissemination by inadvertent spillage of mucous contents. We describe a case of a MAS presenting with a palpable mass in the right thigh in which a pre-operative diagnosis was made by characteristic multidetector CT (MDCT) findings.
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Affiliation(s)
- M K Kim
- Department of Diagnostic Radiology, Chung-Ang University College of Medicine, Seoul, Korea
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