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Kim DW, Lim JH, Cho S, Kim SH. Effects of Banhabaekchulcheonma-Tang on Brain Injury and Cognitive Function Impairment Caused by Bilateral Common Carotid Artery Stenosis in a Mouse Model. Int J Med Sci 2024; 21:644-655. [PMID: 38464836 PMCID: PMC10920841 DOI: 10.7150/ijms.90167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 01/09/2024] [Indexed: 03/12/2024] Open
Abstract
Vascular dementia (VD) is the second most prevalent dementia type, with no drugs approved for its treatment. Here, the effects of Banhabaekchulcheonma-Tang (BBCT) on ischemic brain injury and cognitive function impairment were investigated in a bilateral carotid artery stenosis (BCAS) mouse model. Mice were divided into sham-operated, BCAS control, L-BBCT (40 ml/kg), and H-BBCT (80 ml/kg) groups. BBCT's effects were characterized using the Y-maze test, novel object recognition test (NORT), immunofluorescence staining, RNA sequencing, and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway and Gene Ontology (GO) analyses. The NORT revealed cognitive function improvement in the H-BBCT group, while the Y-maze test revealed no significant difference among the four groups. The CD68+ microglia and GFAP+ astrocyte numbers were reduced in the H-BBCT group. Furthermore, H-BBCT treatment restored the dysregulation of gene expression caused by BCAS. The major BBCT targets were predicted to be cell division cycle protein 20 (CDC20), Epidermal growth factor (EGF), and tumor necrosis factor receptor-associated factor 1 (TRAF1). BBCT regulates the neuroactive ligand-receptor interaction and neuropeptide signaling pathways, as predicted by KEGG and GO analyses, respectively. BBCT significantly improved cognitive impairment in a BCAS mouse model by inhibiting microglial and astrocyte activation and regulating the expression of CDC20, EGF, TRAF1, and key proteins in the neuroactive ligand-receptor interaction and neuropeptide signaling pathways.
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Affiliation(s)
- Da-Woon Kim
- Department of Neuropsychiatry of Korean Medicine, Pohang Korean Medicine Hospital, Daegu Haany University, 411 Saecheonnyeon-daero, Nam-gu, Pohang-si, Gyeongsangbuk-do, Republic of Korea
| | - Jung-Hwa Lim
- Department of Neuropsychiatry, School of Korean Medicine, Pusan National University, 49, Busandaehak-ro, Yangsan-si 50612, Republic of Korea
- Pusan National University Korean Medicine Hospital, 20 Geumo-ro, Yangsan-si 50612, Republic of Korea
| | - Suin Cho
- Department of Korean Medicine, School of Korean Medicine, Pusan National University, 49 Busandaehak-ro, Mulgeum-eup, Yangsan, Republic of Korea
| | - Sang-Ho Kim
- Department of Neuropsychiatry of Korean Medicine, Pohang Korean Medicine Hospital, Daegu Haany University, 411 Saecheonnyeon-daero, Nam-gu, Pohang-si, Gyeongsangbuk-do, Republic of Korea
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Lee CG, Jin G, Lim JH, Liu Y, Afrashtehfar KI, Kim JE. Influence of hydrothermal aging on the shear bond strength of 3D printed denture-base resin to different relining materials. J Mech Behav Biomed Mater 2024; 149:106221. [PMID: 37976994 DOI: 10.1016/j.jmbbm.2023.106221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 10/31/2023] [Accepted: 11/03/2023] [Indexed: 11/19/2023]
Abstract
OBJECTIVES This study evaluated the repairability of three-dimensional printed (3DP) denture bases based on different conventional relining materials and aging. MATERIAL AND METHODS The groups for surface characterization (surface-roughness and contact-angle measurements) were divided based on the denture base and surface treatment. Shear bond strength test and failure-mode analysis were conducted by a combination of three variables: denture base, relining materials, and hydrothermal aging (HA). The initial characterization involved quantifying the surface roughness (n = 10) and contact angle (n = 10) of denture base specimens with and without sandblasting (SB) treatment. Four relining materials (Kooliner [K], Vertex Self-Curing [V], Tokuyama Rebase II (Normal) [T], and Ufi Gel Hard [U]) were applied to 3DP, heat-cured (HC), and self-cured (SC) denture-base resin specimens. Shear bond strength (n = 15) and failure-mode analyses (n = 15) were performed before and after HA, along with evaluations of the fractured surfaces (n = 4). Statistical analyses were performed using a two-way analysis of variance (ANOVA) for surface characterization, and a three-way ANOVA was conducted for shear bond strength. RESULTS The surface roughness peaked in HC groups and increased after SB. The 3DP group displayed significantly lower contact angles, which increased after treatment, similar to the surface roughness. The shear bond strength was significantly lower for 3DP and HC denture bases than for SC denture bases, and peaked for U at 10.65 ± 1.88 MPa (mean ± SD). HA decreased the shear bond strength relative to untreated samples. Furthermore, 3DP, HC, and SC mainly showed mixed or cohesive failures with V, T, and U. K, on the other hand, trended toward adhesive failures when bonded with HC and SC. CONCLUSION This study has validated the repairability of 3DP dentures through relining them with common materials used in clinical practice. The repairability of the 3DP denture base was on par with that of conventional materials, but it decreased after aging. Notably, U, which had a postadhesive application, proved to be the most effective material for repairing 3DP dentures.
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Affiliation(s)
- Chan-Gyu Lee
- Department of Prosthodontics, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea; Oral Science Research Center, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
| | - Gan Jin
- Department of Prosthodontics, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea; Oral Science Research Center, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
| | - Jung-Hwa Lim
- Department of Prosthodontics, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
| | - Yunqi Liu
- Department of Prosthodontics, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea; Oral Science Research Center, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
| | - Kelvin I Afrashtehfar
- Division of Restorative Dental Sciences, College of Dentistry, Ajman University, University Street, Al Jerf 1, 346 Ajman, United Arab Emirates; Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland; Department of Operative Dentistry, Periodontology and Preventive Dentistry, RWTH Aachen University Hospital, Pauwelsstrasse 30, 52074, Aachen, Germany.
| | - Jong-Eun Kim
- Department of Prosthodontics, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
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Oh R, Lim JH, Lee CG, Lee KW, Kim SY, Kim JE. Effects of washing solution temperature on the biocompatibility and mechanical properties of 3D-Printed dental resin material. J Mech Behav Biomed Mater 2023; 143:105906. [PMID: 37178635 DOI: 10.1016/j.jmbbm.2023.105906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 05/07/2023] [Accepted: 05/08/2023] [Indexed: 05/15/2023]
Abstract
The use of digital manufacturing, particularly additive manufacturing using three-dimensional (3D) printing, is expanding in the field of dentistry. 3D-printed resin appliances must undergo an essential process, post-washing, to remove residual monomers; however, the effect of the washing solution temperature on the biocompatibility and mechanical properties remains unclear. Therefore, we processed 3D-printed resin samples under different post-washing temperatures (without temperature control (N/T), 30 °C, 40 °C, and 50 °C) for different durations (5, 10, 15, 30, and 60 min) and evaluated the degree of conversion rate, cell viability, flexural strength, and Vickers hardness. Increasing the washing solution temperature significantly improved the degree of conversion rate and cell viability. Conversely, increasing the solution temperature and time decreased the flexural strength and microhardness. This study confirmed that the washing temperature and time influence the mechanical and biological properties of the 3D-printed resin. Washing 3D-printed resin at 30 °C for 30 min was most efficient to maintain optimal biocompatibility and minimize changes of mechanical properties.
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Affiliation(s)
- Rojee Oh
- Dental Hospital, Veterans Health Service Medical Center, Seoul, 05368, Republic of Korea; Department of Prosthodontics, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Jung-Hwa Lim
- Department of Prosthodontics, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Chan-Gyu Lee
- Department of Prosthodontics, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea; Oral Science Research Center, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Keun-Woo Lee
- Dental Hospital, Veterans Health Service Medical Center, Seoul, 05368, Republic of Korea; Department of Prosthodontics, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Sung-Yong Kim
- Dental Hospital, Veterans Health Service Medical Center, Seoul, 05368, Republic of Korea.
| | - Jong-Eun Kim
- Department of Prosthodontics, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
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Lim JH, Lee JH, Kwon CY, Lee SH, Kang CW, Cho E, Kim HW, Cho JH, Kim BK. Pharmacopuncture Effects on Insomnia Disorder: Protocol for a Multi-Site, Randomized, Acupuncture-Controlled, Clinical Trial. Int J Environ Res Public Health 2022; 19:16688. [PMID: 36554572 PMCID: PMC9779640 DOI: 10.3390/ijerph192416688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 12/01/2022] [Accepted: 12/09/2022] [Indexed: 06/17/2023]
Abstract
Insomnia is a common health problem that can lead to various diseases and negatively impact quality of life. Pharmacopuncture is a new type of acupuncture that involves applying herbal medicine extracts to acupoints. Korean medicine doctors frequently use it to treat insomnia disorder. However, there is insufficient evidence to support the effectiveness and safety of pharmacopuncture for insomnia disorder. We designed a pragmatic randomized controlled trial to compare the effectiveness of pharmacopuncture and acupuncture for insomnia disorder. This multi-site, randomized, acupuncture-controlled trial will enroll 138 insomnia patients. The subjects will be randomly assigned to one of two groups, pharmacopuncture or acupuncture, at a 2:1 ratio. For 4 weeks, the participants will receive ten sessions of pharmacopuncture or acupuncture treatment and will be followed up for 4 weeks after the treatment ends. The Pittsburgh Sleep Quality Index score is the primary outcome measure. Insomnia severity index score, sleep parameters recorded using actigraphy and sleep diaries, physical symptoms associated with insomnia, emotions, quality of life, medical costs, and safety are the secondary outcome measures. The findings of this trial willprovide evidence that will be useful in clinical decision-making for insomnia treatment strategies.
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Affiliation(s)
- Jung-Hwa Lim
- Department of Neuropsychiatry, School of Korean Medicine, Pusan National University, 49, Busandaehak-ro, Yangsan-si 50612, Republic of Korea
- Pusan National University Korean Medicine Hospital, 20, Geumo-ro, Yangsan-si 50612, Republic of Korea
| | - Jae-Hyok Lee
- Department of Neuropsychiatry, College of Korean Medicine, Semyung University, 63, Sangbang 4-gil, Chungju-si 27429, Republic of Korea
| | - Chan-Young Kwon
- Department of Oriental Neuropsychiatry, College of Korean Medicine, Dong-Eui University, 52-57, Yangjeong-ro, Busan-si 47227, Republic of Korea
| | - Sang-Hyup Lee
- Department of Korean Medical Classics, College of Korean Medicine, Dong-Eui University, 52-57, Yangjeong-ro, Busan-si 47227, Republic of Korea
| | - Chang-Wan Kang
- Industrial Management, Big Data Engineering Major, Dong-Eui University, 176, Eomgwang-ro, Busan-si 47340, Republic of Korea
| | - Eun Cho
- College of Pharmacy, Sookmyung Women’s University, 100, Cheongpa-ro 47-gil, Seoul-si 04310, Republic of Korea
| | - Hyun-Woo Kim
- Department of Neurology, Pusan National University Yangsan Hospital, 49, Busandaehak-ro, Yangsan-si 50612, Republic of Korea
| | - Jun-Hee Cho
- Department of Neuropsychiatry, School of Korean Medicine, Pusan National University, 49, Busandaehak-ro, Yangsan-si 50612, Republic of Korea
- Pusan National University Korean Medicine Hospital, 20, Geumo-ro, Yangsan-si 50612, Republic of Korea
| | - Bo-Kyung Kim
- Department of Neuropsychiatry, School of Korean Medicine, Pusan National University, 49, Busandaehak-ro, Yangsan-si 50612, Republic of Korea
- Pusan National University Korean Medicine Hospital, 20, Geumo-ro, Yangsan-si 50612, Republic of Korea
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Lee SY, Lim JH, Kim D, Lee DH, Kim SG, Kim JE. Evaluation of the color stability of 3D printed resin according to the oxygen inhibition effect and temperature difference in the post-polymerization process. J Mech Behav Biomed Mater 2022; 136:105537. [PMID: 36327665 DOI: 10.1016/j.jmbbm.2022.105537] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 10/15/2022] [Accepted: 10/19/2022] [Indexed: 11/06/2022]
Abstract
The aim of this study was to determine the color stability of 3D printed resin according to the post-curing conditions (polymerization conditions and temperature). Specimens were post-polymerized under different conditions of oxygen inhibition, such as on glycerin immersion (GLY), medium-low vacuum environment (VA), and oxygen contact (CON, the control group), and temperature (35 °C, 60 °C, and 80 °C). The degree of conversion (DC), water sorption (Wsp) and solubility (Wsl), surface roughness (Ra) were measured. Additionally, surface free energy (SFE), pH values of colorants were measured. Grape juice (grape), coffee, and curry were used as the colorants, and distilled water (DW) was used as a control. And the color value was measured before and after immersion using a spectrophotometer. Then, Calculated the color change. For statistical methods, The Shapiro-Wilk test performed to check for normality revealed that the data presented a normal distribution (p>0.05). ΔE values were analyzed using three-way ANOVA. DC, Wsp, Wsl, SFE, and Ra were analyzed using two-way ANOVA. To confirm the linear correlation, Pearson's correlation coefficient was determined. The threshold for significance (p) was set at 0.05 (95% confidence interval) for all tests. DC was the highest at 80 °C in the GLY group (95.08 ± 4.88%). And Wsl decreased with increasing temperature, and was lowest at 80 °C in the GLY group (0.46 ± 0.30 um/mm3). After the colorants were immersed for 30 days, as the temperature increased, ΔE decreased in the GLY group but not in the VA and CON groups, and was the lowest at 80 °C in the GLY group: (DW, 0.95 ± 0.45 [mean± SD]; grape, 6.45± 0.69; coffee, 4.50± 0.56; curry, 9.37± 1.40). There was also a significant inverse relation between DC and ΔE. A significant inverse relation was found between Wsl and DC, and a significant positive correlation was found between Wsl and ΔE. Wsp, SFE, and Ra did not affect color stability. In the post-polymerization process, increasing the temperature and GLY were effective in reducing ΔE, which was lowest at 80 °C in the GLY group. It was also observed that a complex mechanism between the DC, Wsl of 3D printed resin affects ΔE of the resin.
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Affiliation(s)
- Sang-Yub Lee
- Department of Prosthodontics, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea; Department of Prosthodontics, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Ilwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea
| | - Jung-Hwa Lim
- Department of Prosthodontics, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Dohyun Kim
- Department of Conservative Dentistry, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Dong-Hwan Lee
- Department of Prosthodontics, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Ilwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea
| | - Seok Gyu Kim
- Department of Prosthodontics, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Ilwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea
| | - Jong-Eun Kim
- Department of Prosthodontics, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
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Lee JE, Jung IC, Lee SY, Lim JH, Kim BK, Cho E. The Cost-Effectiveness Analysis of Gamiguibi-Tang versus Hwangryunhaedok-Tang for Patients with Insomnia Disorder Based on a Randomized Controlled Trial. Healthcare (Basel) 2022; 10:healthcare10112157. [PMID: 36360498 PMCID: PMC9690131 DOI: 10.3390/healthcare10112157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 10/13/2022] [Accepted: 10/26/2022] [Indexed: 11/16/2022] Open
Abstract
(1) Insomnia is associated with poor quality of life and loss of productivity, and is a significant economic burden on society. Gamiguibi-tang (GGBT) is the most frequently prescribed herbal medicine for insomnia treatment. Hwangryunhaedok-tang (HHT) is used as an insured herbal medicine for insomnia in the Korean National Health Insurance (NHI) system. This study aims to evaluate the cost-effectiveness of GGBT versus HHT in patients with insomnia disorders based on clinical trial data; (2) Methods: The EuroQol five-dimension scale (EQ-5D) was used to estimate quality-adjusted life-years (QALY). Direct and non-direct medical costs and lost productivity costs were estimated. The cost-effectiveness of GGBT was compared with HHT treatments over six weeks from a societal perspective; (3) Results: A total of 81 patients who underwent GGBT (n = 56) and HHT (n = 25) treatment completed the clinical trial. The EQ-5D score improved significantly more in the GGBT than in the HHT group (0.02 vs. −0.03, p < 0.05). The QALYs for six weeks were slightly greater in GGBT (0.0997) than in the HHT group (0.0987); however, the total costs incurred were approximately 9% less in GGBT ($934) than in the HHT group ($1029). GGBT was found to be a more economically dominant treatment option compared to HHT for treating insomnia; (4) Conclusions: Among herbal medicines, GGBT may be a cost-effective option for treating insomnia from a societal perspective in Korea.
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Affiliation(s)
- Ji-Eun Lee
- College of Pharmacy, Sookmyung Women's University, Seoul 04310, Korea
| | - In-Chul Jung
- Department of Oriental Neuropsychiatry, College of Korean Medicine, Daejeon University, Daejeon 34520, Korea
| | - So-Young Lee
- College of Pharmacy, Sookmyung Women's University, Seoul 04310, Korea
| | - Jung-Hwa Lim
- Department of Neuropsychiatry, School of Korean Medicine, Pusan National University Korean Medicine Hospital, Pusan National University, Yangsan 50612, Korea
| | - Bo-Kyung Kim
- Department of Neuropsychiatry, School of Korean Medicine, Pusan National University Korean Medicine Hospital, Pusan National University, Yangsan 50612, Korea
| | - Eun Cho
- College of Pharmacy, Sookmyung Women's University, Seoul 04310, Korea
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Kang MJ, Lim JH, Lee CG, Kim JE. Effects of Post-Curing Light Intensity on the Mechanical Properties and Three-Dimensional Printing Accuracy of Interim Dental Material. Materials (Basel) 2022; 15:6889. [PMID: 36234230 PMCID: PMC9570601 DOI: 10.3390/ma15196889] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 09/28/2022] [Accepted: 09/30/2022] [Indexed: 06/16/2023]
Abstract
This study evaluated the effects of the light intensity of curing and the post-curing duration on the mechanical properties and accuracy of the interim dental material. After designing the specimen, 3D printing was performed, and the light intensity was divided into groups G20, G60, G80, and G120 (corresponding to 1.4−1.6, 2.2−3.0, 3.8−4.4, and 6.4−7.0 mW/cm2, respectively), with no post-curing or 5, 10, or 20 min of post-curing being performed. The flexural properties, Vickers microhardness, degree of conversion (DC), and 3D accuracy were then evaluated. The flexural properties and Vickers microhardness showed a sharp increase at the beginning of the post-curing and then tended to increase gradually as the light intensity and post-curing time increased (p < 0.001). On the other hand, there was no significant difference between groups in the accuracy analysis of a 3D-printed three-unit bridge. These results indicate that the light intensity of the post-curing equipment influences the final mechanical properties of 3D-printed resin and that post-curing can be made more efficient by optimizing the light intensity and post-curing time.
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Bayarsaikhan E, Gu H, Hwangbo NK, Lim JH, Shim JS, Lee KW, Kim JE. Influence of different postcuring parameters on mechanical properties and biocompatibility of 3D printed crown and bridge resin for temporary restorations. J Mech Behav Biomed Mater 2022; 128:105127. [PMID: 35182913 DOI: 10.1016/j.jmbbm.2022.105127] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [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: 01/06/2022] [Revised: 02/08/2022] [Accepted: 02/08/2022] [Indexed: 11/25/2022]
Abstract
This study analyzed the flexural properties, Vickers hardness, degree of conversion (DC), and cell viability of 3D printed crown and bridge resin postcured using various types of postcuring equipment (PCE). 3D printed specimens were postcured for various times using different types of 3D printing PCE [for 5, 15, and 30 min using LC 3D Print Box (LC), Form Cure (FC), Cure M (CM), and Veltz 3D (VE) devices] and the VALO handheld light-curing (VA) device for 20, 40, and 60 s. Neither the flexural strength (132.27-145.79 MPa) nor the flexural modulus (1.52-1.83 GPa) differed significantly when postcuring for 30 min using the LC, FC, CM, or VE device, or for 20, 40, or 60 s of postcuring using the VA device (p > 0.05). The Vickers hardness was highest after 30 min of postcuring for all groups, and varied significantly with the postcuring time in the LC (p < 0.001) and CM (p < 0.001) groups. DC was significantly higher for the 5-min CM group (84.97 ± 4.02%) than for the GS, 30-min FC, 5-min VE, and 20-s VA groups. Cell viability of the postcured resin specimens was 56.46-92.29%, and varied significantly in the CM and VE groups according to the postcuring time (p < 0.05). Confocal laser scanning microscopy observations showed well-developed cell morphology and numerous cell-cell contacts in all groups except the GS group. This study found that the use of different types of PCE did not significantly affect the flexural properties of 3D printed crown and bridge resin, whereas there were significant variations in DC, Vickers hardness, and cell viability.
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Affiliation(s)
- Enkhjargal Bayarsaikhan
- Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Hanna Gu
- Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Na-Kyung Hwangbo
- Department of Orofacial and Oral Medicine, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Jung-Hwa Lim
- Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - June-Sung Shim
- Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Keun-Woo Lee
- Dental Hospital, VHS Medical Center, Seoul, Republic of Korea
| | - Jong-Eun Kim
- Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
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Kim SH, Lim JH. Traditional East Asian Herbal Medicine for Post-Stroke Insomnia: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Int J Environ Res Public Health 2022; 19:ijerph19031754. [PMID: 35162777 PMCID: PMC8834856 DOI: 10.3390/ijerph19031754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/25/2022] [Accepted: 01/31/2022] [Indexed: 11/16/2022]
Abstract
Post-stroke insomnia (PSI) is a highly prevalent complication after stroke. Current evidence of psychotropic drug use for PSI management is scarce and indicates harmful adverse events (AEs). Traditional East Asian herbal medicine is a widely used traditional remedy for insomnia. However, so far, no study has systematically reviewed the efficacy and safety of traditional east asian herbal medicine (HM) for PSI. Therefore, we perform meta-analysis to evaluate the effectiveness and safety of HM for PSI. After a comprehensive electronic search of 15 databases, we review the randomized controlled trials (RCTs) of HM use as monotherapy for PSI. Our outcomes were the Pittsburgh sleep quality index and total effective rate. In total, 24 RCTs were conducted with 1942 participants. HM showed statistically significant benefits in sleep quality. It also appeared to be safer than psychotropic drugs in terms of AEs, except when the treatment period was two weeks. The methods used for RCTs were poor, and the quality of evidence assessed was graded “low” or “moderate.” The findings of this review indicate that the use of HM as a monotherapy may have potential benefits in PSI treatment when administered as an alternative to conventional medications. However, considering the methodological quality of the included RCTs, we were uncertain of the clinical evidence. Further, well-designed RCTs are required to confirm these findings.
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Affiliation(s)
- Sang-Ho Kim
- Department of Neuropsychiatry of Korean Medicine, Pohang Korean Medicine Hospital, Daegu Haany University, 411 Saecheonnyeon-daero, Pohang-si 37685, Korea;
| | - Jung-Hwa Lim
- Department of Neuropsychiatry, School of Korean Medicine, Pusan National University, 49 Busandaehak-ro, Mulgeum-eup, Yangsan-si 50612, Korea
- Correspondence: ; Tel.: +82-55-360-5979
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Nam NE, Shin SH, Lim JH, Shim JS, Kim JE. Effects of Artificial Tooth Brushing and Hydrothermal Aging on the Mechanical Properties and Color Stability of Dental 3D Printed and CAD/CAM Materials. Materials (Basel) 2021; 14:ma14206207. [PMID: 34683798 PMCID: PMC8540203 DOI: 10.3390/ma14206207] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [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: 08/31/2021] [Revised: 10/06/2021] [Accepted: 10/15/2021] [Indexed: 12/22/2022]
Abstract
This study analyzed the surface roughness and waviness, Vickers hardness (VHN), and color changes of six types of 3D printed resins and computer-aided design/computer-aided manufacturing (CAD/CAM) materials after artificial toothbrushing. The average surface roughness height (Ra) change of Formlabs denture teeth A2 resin (FMLB) was not significant between after artificial toothbrushing (0.17 ± 0.02 μm and 0.17 ± 0.05 μm, respectively; mean ± standard deviation). However, the Ra value increased significantly in all remaining groups. Regarding waviness, polymethylmethacrylate (PMMA) had the largest increases in average waviness height (Wa) and maximum surface waviness height (Wz) between, before (0.43 ± 0.23 μm and 0.08 ± 0.02 μm), and after (8.67 ± 4.03 μm, 1.30 ± 0.58 μm) toothbrushing. There were no significant changes in Wa for Formlabs denture teeth A2 resin (FMLB) and NextDent C&B (NXT). After artificial toothbrushing, the dispersed-filler composite (DFC) group had the largest color difference (ΔE, of 2.4 ± 0.9), and the remaining materials had smaller changes than the clinical acceptance threshold of ΔE = 2.25. The VHN of FMLB and NXT were 9.1 ± 0.4 and 15.5 ± 0.4, respectively, and were not affected by artificial toothbrushing. The flexural strengths of the 3D printed materials were 139.4 ± 40.5 MPa and 163.9 ± 14.0 MPa for FMLB and NXT, respectively, which were similar to those of the polycarbonate and PMMA groups (155.2 ± 23.6 MPa and 108.0 ± 8.1 MPa, respectively). This study found that the evaluated 3D printed materials had mechanical and optical properties comparable to those of CAD/CAM materials and were stable even after artificial toothbrushing and hydrothermal aging.
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Affiliation(s)
- Na-Eun Nam
- BK21 FOUR Project, Department of Prosthodontics, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seodaemun-gu, Seoul 03722, Korea; (N.-E.N.); (S.-H.S.); (J.-H.L.)
| | - Seung-Ho Shin
- BK21 FOUR Project, Department of Prosthodontics, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seodaemun-gu, Seoul 03722, Korea; (N.-E.N.); (S.-H.S.); (J.-H.L.)
| | - Jung-Hwa Lim
- BK21 FOUR Project, Department of Prosthodontics, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seodaemun-gu, Seoul 03722, Korea; (N.-E.N.); (S.-H.S.); (J.-H.L.)
| | - June-Sung Shim
- Department of Prosthodontics, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seodaemun-gu, Seoul 03722, Korea;
| | - Jong-Eun Kim
- Department of Prosthodontics, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seodaemun-gu, Seoul 03722, Korea;
- Correspondence: ; Tel.: +82-2-2228-3160
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Shin SH, Doh RM, Lim JH, Kwon JS, Shim JS, Kim JE. Evaluation of Dimensional Changes According to Aging Period and Postcuring Time of 3D-Printed Denture Base Prostheses: An In Vitro Study. Materials (Basel) 2021; 14:ma14206185. [PMID: 34683773 PMCID: PMC8539717 DOI: 10.3390/ma14206185] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 08/31/2021] [Revised: 10/14/2021] [Accepted: 10/16/2021] [Indexed: 11/16/2022]
Abstract
During the three-dimensional (3D) printing process of a dental prosthesis, using photopolymer resin, partially polymerized resin is further cured through the postcuring process that proceeds after the printing, which improves the stability of the printed product. The mechanical properties of the end product are known to be poor if the postcuring time is insufficient. Therefore, this study evaluated the effect of the postcuring time of the 3D-printed denture base on its dimensional stability, according to the aging period. The 3D prints were processed after designing maxillary and mandibular denture bases, and after the following postcuring times were applied: no postcuring, and 5, 15, 30, and 60 min. The dimensional stability change of the denture base was evaluated and analyzed for 28 days after the postcuring process. The trueness analysis indicated that the mandibular denture base had lower output accuracy than the maxillary denture base, and the dimensional stability change increased as postcuring progressed. In the no postcuring group for the mandible, the error value was 201.1 ± 5.5 µm (mean ± standard deviation) after 28 days, whereas it was 125.7 ± 13.0 µm in the 60 min postcuring group. For both the maxilla and the mandible, shorter postcuring times induced larger dimensional stability changes during the aging process. These findings indicate that in order to manufacture a denture base with dimensional stability, a sufficient postcuring process is required during the processing stage.
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Affiliation(s)
- Seung-Ho Shin
- BK21 FOUR Project, Oral Research Science Center, Department of Prosthodontics, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seoul 03722, Korea; (S.-H.S.); (J.-H.L.)
| | - Re-Mee Doh
- Department of Advanced General Dentistry, College of Dentistry, Dankook University, Cheonan 31116, Korea;
| | - Jung-Hwa Lim
- BK21 FOUR Project, Oral Research Science Center, Department of Prosthodontics, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seoul 03722, Korea; (S.-H.S.); (J.-H.L.)
| | - Jae-Sung Kwon
- Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, Seoul 03722, Korea;
| | - June-Sung Shim
- Department of Prosthodontics, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seoul 03722, Korea;
| | - Jong-Eun Kim
- Department of Prosthodontics, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seoul 03722, Korea;
- Correspondence: ; Tel.: +82-2-2228-3166
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Kim SH, Lim JH. Herbal medicine for post-stroke insomnia: A protocol for systematic review and meta-analysis. Medicine (Baltimore) 2021; 100:e26223. [PMID: 34087901 PMCID: PMC8183778 DOI: 10.1097/md.0000000000026223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 05/18/2021] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Post-stroke insomnia (PSI) is a highly prevalent complication in patients with stroke. However, there has been no comprehensive systematic review assessing the efficacy and safety of herbal medicine (HM) on PSI. This protocol was developed to conduct a systematic review and meta-analysis to evaluate the evidence related to the efficacy and safety of HM on PSI. METHODS We will perform a comprehensive electronic search, including Medline, EMBASE, CENTRAL, AMED, CINAHL, PsycARTICLES, and Chinese, Korean, and Japanese databases from their inception to November 2020. This systemic review will include only randomized controlled clinical trials of HM on PSI. The main outcome is the Pittsburgh Sleep Quality Index score. Two researchers will independently screen citations and abstracts, identify full-text articles for inclusion, extract data, and appraise the quality and risk of bias of included studies. A meta-analysis will be conducted using Review Manager 5.4. The evidence quality of each outcome will be appraised according to Grades of Recommendation, Assessment, Development, and Evaluation. RESULTS This protocol adheres to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses-P (PRISMA-P) guidelines to ensure clarity and completeness of reporting in all phases of the systematic review. CONCLUSION This study will provide evidence regarding the efficacy and safety of HM for the treatment of PSI. ETHICS AND DISSEMINATION No ethical approval will be needed because data from previously published studies in which informed consent was obtained by primary investigators will be retrieved and analyzed. We will publish this systematic review in a peer-reviewed journal. OSF REGISTRATION DOI 10.17605/OSF.IO/PEHQZ.
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Affiliation(s)
- Sang-Ho Kim
- Department of Neuropsychiatry of Korean Medicine, Pohang Korean Medicine Hospital, Daegu Haany University, 411 Saecheonnyeon-daero, Nam-gu, Pohang-si, Gyeongsangbuk-do
| | - Jung-Hwa Lim
- Department of Neuropsychiatry, School of Korean Medicine, Pusan National University, 49 Busandaehak-ro, Mulgeum-eup, Yangsan, Republic of Korea
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Lim JH, Mangal U, Nam NE, Choi SH, Shim JS, Kim JE. A Comparison of Accuracy of Different Dental Restorative Materials between Intraoral Scanning and Conventional Impression-Taking: An In Vitro Study. Materials (Basel) 2021; 14:ma14082060. [PMID: 33921830 PMCID: PMC8073328 DOI: 10.3390/ma14082060] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 03/04/2021] [Revised: 04/15/2021] [Accepted: 04/18/2021] [Indexed: 11/16/2022]
Abstract
The properties of underlying substrates influence the quality of an intraoral scan, but few studies have compared the outcomes using common restorative materials. In this study, we aimed to compare the accuracy of digital and conventional impressions recorded for four different dental materials as the substrates. Experimental crowns were produced with a metallic surface (gold or cobalt-chromium alloy (Co-Cr)) or without a metallic surface (zirconia or PMMA (polymethyl methacrylate)). A conventional impression was made in the conventional group (CON group), and gypsum models were subsequently scanned with a tabletop scanner. An intraoral scanner was used to scan the crowns either after applying a powder spray to reduce the surface reflectivity (IOS-P group) or without the powder spray (IOS group). The scans were assessed in three dimensions for precision and trueness. The accuracy did not differ between the CON and IOS groups for the non-metallic crowns. However, it was statistically different for the Co-Cr metallic crown, reducing trueness observed between groups as CON > IOS > IOS-P. The study evidences the differences in outer surface accuracy observed with a change in the substrate material to be imaged using an oral scanner and with the impression method. These findings suggest that the restoration material present in the oral cavity should be considered when selecting an impression-taking method.
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Affiliation(s)
- Jung-Hwa Lim
- Oral Research Science Center, Department of Prosthodontics, Yonsei University College of Dentistry, Seoul 03722, Korea; (J.-H.L.); (N.-E.N.)
| | - Utkarsh Mangal
- Institute of Craniofacial Deformity, Department of Orthodontics, Yonsei University College of Dentistry, Seoul 03722, Korea; (U.M.); (S.-H.C.)
| | - Na-Eun Nam
- Oral Research Science Center, Department of Prosthodontics, Yonsei University College of Dentistry, Seoul 03722, Korea; (J.-H.L.); (N.-E.N.)
| | - Sung-Hwan Choi
- Institute of Craniofacial Deformity, Department of Orthodontics, Yonsei University College of Dentistry, Seoul 03722, Korea; (U.M.); (S.-H.C.)
| | - June-Sung Shim
- Department of Prosthodontics, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seodaemun-gu, Seoul 03722, Korea;
| | - Jong-Eun Kim
- Department of Prosthodontics, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seodaemun-gu, Seoul 03722, Korea;
- Correspondence: ; Tel.: +82-2-2228-3166
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Lim JH, Bayarsaikhan E, Shin SH, Nam NE, Shim JS, Kim JE. Effects of Groove Sealing of the Posterior Occlusal Surface and Offset of the Internal Surface on the Internal Fit and Accuracy of Implant Placements Using 3D-Printed Surgical Guides: An In Vitro Study. Polymers (Basel) 2021; 13:polym13081236. [PMID: 33920389 PMCID: PMC8070577 DOI: 10.3390/polym13081236] [Citation(s) in RCA: 2] [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: 03/03/2021] [Revised: 04/08/2021] [Accepted: 04/08/2021] [Indexed: 11/16/2022] Open
Abstract
This study evaluated the internal fit and the accuracy of the implant placement position in order to determine how the surface shape of the tooth and the offset influence the accuracy of the surgical guide. The acquired digital data were analyzed in three dimensions using 3D inspection software. The obtained results confirmed that the internal fit was better in the groove sealing (GS) group (164.45 ± 28.34 μm) than the original shape (OS) group (204.07 ± 44.60 μm) (p < 0.001), and for an offset of 100 μm (157.50 ± 17.26 μm) than for offsets of 30 μm (206.48 ± 39.12 μm) and 60 μm (188.82 ± 48.77 μm) (p < 0.001). The accuracy of implant placement was better in the GS than OS group in terms of the entry (OS, 0.229 ± 0.092 mm; GS, 0.169 ± 0.061 mm; p < 0.001), apex (OS, 0.324 ± 0.149 mm; GS, 0.230 ± 0.124 mm; p < 0.001), and depth (OS, 0.041 ± 0.027 mm; GS, 0.025 ± 0.022 mm; p < 0.001). In addition, the entries (30 μm, 0.215 ± 0.044 mm; 60 μm, 0.172 ± 0.049 mm; 100 μm, 0.119 ± 0.050 mm; p < 0.001) were only affected by the amount of offset. These findings indicate that the accuracy of a surgical guide can be improved by directly sealing the groove of the tooth before manufacturing the surgical guide or setting the offset during the design process.
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Affiliation(s)
- Jung-Hwa Lim
- Department of Prosthodontics, Oral Research Science Center, BK21 FOUR Project, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seodaemun-gu, Seoul 03722, Korea; (J.-H.L.); (S.-H.S.); (N.-E.N.)
| | - Enkhjargal Bayarsaikhan
- Department of Prosthodontics, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seodaemun-gu, Seoul 03722, Korea; (E.B.); (J.-S.S.)
| | - Seung-Ho Shin
- Department of Prosthodontics, Oral Research Science Center, BK21 FOUR Project, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seodaemun-gu, Seoul 03722, Korea; (J.-H.L.); (S.-H.S.); (N.-E.N.)
| | - Na-Eun Nam
- Department of Prosthodontics, Oral Research Science Center, BK21 FOUR Project, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seodaemun-gu, Seoul 03722, Korea; (J.-H.L.); (S.-H.S.); (N.-E.N.)
| | - June-Sung Shim
- Department of Prosthodontics, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seodaemun-gu, Seoul 03722, Korea; (E.B.); (J.-S.S.)
| | - Jong-Eun Kim
- Department of Prosthodontics, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seodaemun-gu, Seoul 03722, Korea; (E.B.); (J.-S.S.)
- Correspondence: ; Tel.: +82-2-2228-3160
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15
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Lim JH, Shin SH, Nam NE, Bayarsaikhan E, Shim JS, Kim JE. Sleeve insert scan body to predict implant placement position by using implant surgical guides: A dental technique. J Prosthet Dent 2021; 127:827-831. [PMID: 33541819 DOI: 10.1016/j.prosdent.2020.12.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 12/02/2020] [Accepted: 12/03/2020] [Indexed: 10/22/2022]
Abstract
In studies that assessed the accuracy of implant surgical guides, evaluations were based on the placement position of the implant by using a manufactured surgical guide. However, such assessments could involve errors that may occur during implant placement. Therefore, evaluating the 3-dimensional accuracy of the fabrication of the implant surgical guide itself is not enough. In the evaluation method described in this article, location-related information is obtained by connecting a scan body to the sleeve of the surgical guide instead of directly placing the implant. This helps to evaluate the accuracy of the surgical guide without errors in the placement of an implant.
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Affiliation(s)
- Jung-Hwa Lim
- Graduate student, Department of Prosthodontics, Oral Research Science Center, BK21 FOUR Project, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Seung-Ho Shin
- Graduate student, Department of Prosthodontics, Oral Research Science Center, BK21 FOUR Project, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Na-Eun Nam
- Graduate student, Department of Prosthodontics, Oral Research Science Center, BK21 FOUR Project, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Enkhjargal Bayarsaikhan
- Graduate student, Department of Prosthodontics, Oral Research Science Center, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - June-Sung Shim
- Professor, Department of Prosthodontics, Oral Research Science Center, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Jong-Eun Kim
- Assistant Professor, Department of Prosthodontics, Oral Research Science Center, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
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Kim JE, Lim JH, Kang YJ, Kim JH, Shim JS. Effect of Pressure and Particle Size During Aluminum Oxide Air Abrasion on the Flexural Strength of Disperse-Filled Composite and Polymer-Infiltrated Ceramic Network Materials. Polymers (Basel) 2020; 12:polym12061396. [PMID: 32580368 PMCID: PMC7362000 DOI: 10.3390/polym12061396] [Citation(s) in RCA: 2] [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: 05/26/2020] [Revised: 06/12/2020] [Accepted: 06/19/2020] [Indexed: 11/16/2022] Open
Abstract
Esthetic dental computer-aided design/computer-aided manufacturing (CAD/CAM) polymers such as disperse-filled composites (DFC) and polymer-infiltrated ceramic networks (PICN) should be subjected to surface treatment before bonding. However, such treatment can lead to defect formation and a decrease in strength. Therefore, in this study, we compared the flexural strengths of DFC and PICN materials air-abraded with alumina particles of different sizes at different pressures. In addition to Weibull analysis, the samples (untreated and treated) were characterized by scanning electron microscopy and atomic force microscopy. Both DFC and PICN exhibited the lowest flexural strength at large particle sizes and high pressures. Therefore, we optimized the air abrasion parameters to maintain the flexural strength and significantly increase surface roughness. In the case of DFC, the optimal particle size and pressure conditions were 50 µm at 2 bar and 110 µm at 1 bar, while for PICN, the best performance was obtained using Al2O3 particles with a size of 50 µm at 1 bar. This study reveals that optimization of the surface treatment process is crucial in the fabrication of high-performance clinical materials for dental restorations.
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Kim SH, Jeong JH, Lim JH, Kim BK. Corrigendum to “Acupuncture using pattern-identification for the treatment of insomnia disorder: a systematic review and meta-analysis of randomized controlled trials” [Integr Med Res 8 (2019) 216–226]. Integr Med Res 2020; 9:100420. [DOI: 10.1016/j.imr.2020.100420] [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: 04/22/2020] [Accepted: 04/22/2020] [Indexed: 10/24/2022] Open
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18
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Argunova TS, Kohn VG, Lim JH, Gudkina ZV, Nazarova ED. Computer simulations of X-ray phase-contrast images and microtomographic observation of tubules in dentin. J Synchrotron Radiat 2020; 27:462-467. [PMID: 32153285 DOI: 10.1107/s1600577519016503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 12/07/2019] [Indexed: 06/10/2023]
Abstract
An investigation of the problems of X-ray imaging of dentinal tubules is presented. Two main points are addressed. In the first part of this paper, the problem of computer simulating tubule images recorded in a coherent synchrotron radiation (SR) beam has been discussed. A phantom material which involved a two-dimensional lattice of the tubules with parameters similar to those of dentin was considered. By a comparative examination of two approximations, it was found that the method of phase-contrast imaging is valid if the number of tubules along the beam is less than 100. Calculated images from a lattice of 50 × 50 tubules are periodic in free space but depend strongly on the distance between the specimen and the detector. In the second part, SR microtomographic experiments with millimetre-sized dentin samples in a partially coherent beam have been described. Tomograms were reconstructed from experimental projections using a technique for incoherent radiation. The main result of this part is the three-dimensional rendering of the directions of the tubules in a volume of the samples. Generation of the directions is possible because a tomogram shows the positions of the tubules. However, a detailed tubule cross-section structure cannot be restored.
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Affiliation(s)
- T S Argunova
- Ioffe Institute RAS, Polytekhnicheskaya St 26, 194021 St Petersburg, Russia
| | - V G Kohn
- National Research Centre `Kurchatov Institute', 1 Kurchatov Sq., Moscow, Russia
| | - J H Lim
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Namku, Pohang, Republic of Korea
| | - Z V Gudkina
- Ioffe Institute RAS, Polytekhnicheskaya St 26, 194021 St Petersburg, Russia
| | - E D Nazarova
- Ioffe Institute RAS, Polytekhnicheskaya St 26, 194021 St Petersburg, Russia
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Lim JH, Kim KO, Kim SH, Kang CW, Kim BK. Electroacupuncture for treatment-resistant insomnia: study protocol for a randomised, controlled, assessor-blinded, pilot clinical trial. BMJ Open 2020; 10:e034239. [PMID: 32107269 PMCID: PMC7202710 DOI: 10.1136/bmjopen-2019-034239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
INTRODUCTION A considerable number of insomnia patients experience sleep disturbance even with long-term use of hypnotic medication. Previous studies have indicated that electroacupuncture (EA) could be an efficacious treatment for managing insomnia. However, few trials have been conducted to evaluate the effectiveness and safety of EA for treatment-resistant insomnia. This pilot study aims to explore the feasibility and preliminary effectiveness and safety of EA as an adjunct treatment for treatment-resistant insomnia. METHODS AND ANALYSIS This is a multicentre, randomised, usual care controlled and assessor-blinded pilot study protocol. Fifty patients presenting with sleep problems who have been taking hypnotic medication for more than 3 months will be randomly allocated to either an EA group or a usual care group at a 1:1 ratio. The EA group will undergo 12 EA treatment sessions twice a week for 6 weeks whereas the usual care group will not receive EA treatment. All the participants will receive a brochure containing educational information on sleep hygiene. The primary outcome will be the measured mean change of the total score of the Insomnia Severity Index from the baseline to week 7. The secondary outcome regarding sleep quality will be measured using the Pittsburgh Sleep Quality Index, a sleep diary and actigraphy. Moreover, we will assess the quality of life, the direct and indirect cost of treating insomnia for economic evaluation. After 4 weeks, the subjects will visit the research sites for a follow-up assessment. ETHICS AND DISSEMINATION Ethical approval of this study protocol was established by the institutional review boards of the each involved study site. All potential subjects will be provided written informed consent. The results of this study will be accessible in peer-reviewed publications and be presented at academic conference. TRIAL REGISTRATION NUMBER KCT0003235.
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Affiliation(s)
- Jung-Hwa Lim
- Department of Neuropsychiatry, School of Korean Medicine, Pusan National University, Yangsan-si, Gyeongsanganm-do, Korea (the Republic of)
| | - Kyung-Ok Kim
- Department of Oriental Neuropsychiatry, Dongshin University College of Korean Medicine, Gwangju, Korea (the Republic of)
| | - Sang-Ho Kim
- Department of Neuropsychiatry of Korean Medicine, Pohang Korean Medicine Hospital, Daegu Haany University College of Oriental Medicine, Pohang-si, Gyeongsangbuk-do, Korea (the Republic of)
| | - Chang-Wan Kang
- Division of Industrial Convergence System Engineering, Dong Eui University, Busan, Busan, Korea (the Republic of)
| | - Bo-Kyung Kim
- Department of Neuropsychiatry, School of Korean Medicine, Pusan National University, Yangsan-si, Gyeongsanganm-do, Korea (the Republic of)
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Kim SH, Jeong JH, Lim JH, Kim BK. Acupuncture using pattern-identification for the treatment of insomnia disorder: a systematic review and meta-analysis of randomized controlled trials. Integr Med Res 2019; 8:216-226. [PMID: 31497504 PMCID: PMC6718809 DOI: 10.1016/j.imr.2019.08.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [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: 05/08/2019] [Revised: 08/09/2019] [Accepted: 08/09/2019] [Indexed: 12/26/2022] Open
Abstract
Background Insomnia symptoms are common, affecting almost 30% of the population of the population. Many use medications that may be ineffective and cause substantial harm. In complementary and alternative medicine, acupuncture is widely used to manage mental health problems. Acupuncture therapy emphasizes individualized treatment according to TCM pattern diagnosis. Although there are some systematic reviews that acupuncture has the benefit for insomnia, there is no systematic review on acupuncture using pattern identification. This review aimed for evaluating acupuncture efficacy using pattern-identification to treat insomnia. Methods We carried out a comprehensive review of randomized controlled trials (from 2000 to April 12, 2018), using PubMed, Cochrane CENTRAL, EMBASE, CINAHL, PsycINFO, CNKI, and 3 Korean (OASIS, NDSL, RISS4U) databases, comparing acupuncture using pattern identification (only) with medication in primary insomnia. Response rate and the Pittsburgh Sleep Quality Index (PSQI) were the primary outcomes. Risk of bias and publication biases were evaluated, and meta-analyses were conducted. Results Nineteen RCTs were included (11 manual acupuncture (1079 patients), 8 electro-acupuncture (442 patients)) of low quality. Meta-analyses of all studies reveled that acupuncture improved total effectiveness rate (Risk Ratio [RR] = 1.23, 95% confidence intervals [CIs]: 1.12-1.35, p < 0.00001; I2 = 80%) and PSQI (MD = -1.92, 95% CI: -2.41-1.42, p < 0.00001; I2 = 30%) compared to medication. Results of overall risk of bias assessments were unclear or high. Conclusions Acupuncture using pattern identification led to significantly improved total effectiveness rate compared to medication. With regard to PSQI, as compared to the control group, acupuncture using pattern identification was similar to medication. However, this study has limitations of high risk of bias, not using a standardized pattern-diagnosis-treatment and not comparing with standarized acupuncture without pattern identification.
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Affiliation(s)
- Sang-Ho Kim
- Department of Neuropsychiatry of Korean Medicine, Pohang Korean Medicine Hospital, DaeguHaany University, 411, Saecheonnyeon-daero, Nam-gu, Pohang-si, Gyeongsangbuk-do, Republic of Korea
| | - Jin-Hyung Jeong
- Neuropsychiatry, Dunsan Korean Medicine Hospital of Daejeon University 75-0, Daedeok-daero 176 beon-gil, Seo-gu, Daejeon, Republic of Korea
| | - Jung-Hwa Lim
- Department of Neuropsychiatry, School of Korean Medicine, Pusan National University 49, Busandaehak-ro, Mulgeum-eup, Yangsan-si, Gyeongsangnam-do, Republic of Korea
| | - Bo-Kyung Kim
- Department of Neuropsychiatry of Korean Medicine, Collerge of Korean Medicine in Dong-Eui University, Yangjeong-ro 62 Busanjin-gu, Busan, Republic of Korea
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Lim JH, Park JM, Kim M, Heo SJ, Myung JY. Comparison of digital intraoral scanner reproducibility and image trueness considering repetitive experience. J Prosthet Dent 2018; 119:225-232. [DOI: 10.1016/j.prosdent.2017.05.002] [Citation(s) in RCA: 116] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 05/02/2017] [Accepted: 05/02/2017] [Indexed: 11/16/2022]
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Ahn YJ, Jo SH, Lee SH, Lim JH. The Review Study on Yoga, Qigong, and Taichi Interventions for Anxiety: Based on Korean Journal Articles from 2009 to 2015. ACTA ACUST UNITED AC 2016. [DOI: 10.7231/jon.2016.27.1.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Jeong MJ, Lee HY, Lim JH, Yun YJ. Current utilization and influencing factors of complementary and alternative medicine among children with neuropsychiatric disease: a cross-sectional survey in Korea. BMC Complement Altern Med 2016; 16:91. [PMID: 26931188 PMCID: PMC4774171 DOI: 10.1186/s12906-016-1066-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 02/23/2016] [Indexed: 11/12/2022]
Abstract
Background Complementary and alternative medicine (CAM) is widespread but has various utilization rates according to country and the condition of patients. Generally, CAM is more frequently used in diseases that have no clear treatment method in conventional medicine. Therefore, a high utilization rate of CAM can be assumed in pediatric neurological diseases, but few studies have investigated the utilization of CAM in children with neuropsychiatric diseases. In particular, studies regarding the current use of CAM are scarce. Methods We conducted a survey of the parents or caregivers of patients who visited the pediatric rehabilitation clinic, pediatric neurology clinic, or pediatric psychiatry clinic at one university hospital from April to July 2011. We analyzed the factors that affect the utilization of CAM and other rehabilitation therapies. Results Among the 578 patients recruited, 258 patients have ever received CAM (51.5 %), and the current CAM utilization rate was 19.0 % (110 patients). Two hundred patients (34.6 %) were currently receiving only other rehabilitation therapies, and 268 patients (46.4 %) were currently receiving no type of therapy. The rate of current CAM usage was significantly high in epilepsy patients. The ORs of 1–6-year-old and 7–12-year-old children compared with 13–19-year-old children were 3.14 (95 % CI 1.31–7.53) and 3.34 (95 % CI 1.64–6.79), respectively, and the OR of the group with longer disease duration (≥48 months) compared with the group with shorter disease duration was 3.36 (95 % CI 1.71–6.59). Only the age and disease duration showed statistically significant differences between the patients who were administered CAM and those who received other rehabilitation therapies (p < 0.0001). Conclusions CAM is preferred by patients under 13 years of age compared with patients aged 13–19 years, whereas other rehabilitation therapies are preferred by patients aged 1–6 years, followed by those aged 6–12 years and then by those aged 13–19 years. The patient’s age and disease duration are the major factors influencing CAM use. Future studies should specify particular diseases, rather than combining all types of neuropsychiatric diseases, and include the socio-economic status of the parents. Electronic supplementary material The online version of this article (doi:10.1186/s12906-016-1066-4) contains supplementary material, which is available to authorized users.
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Kim EJ, Choi EH, Kim NJ, Oh BR, Lim JH. The effect of surveillance program for surgical site infection of hepato-biliary-pancreatic surgery for 5 years: a prospective study in a tertiary hospital in Korea. Antimicrob Resist Infect Control 2015. [PMCID: PMC4474658 DOI: 10.1186/2047-2994-4-s1-p76] [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: 11/10/2022] Open
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Kim SH, Chong JU, Lim JH, Choi GH, Kang CM, Choi JS, Lee WJ, Kim KS. Optimal assessment of lymph node status in gallbladder cancer. Eur J Surg Oncol 2015; 42:205-10. [PMID: 26614023 DOI: 10.1016/j.ejso.2015.10.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [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: 01/28/2015] [Revised: 10/09/2015] [Accepted: 10/29/2015] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Lymph node (LN) metastasis is an important prognostic factor in gallbladder cancer (GBCA). LN status has been adopted as a critical element of staging systems. However, the influence of total lymph node count (TLNC) remains unclear. We determined the optimal minimum TLNC and compared the prognostic significance of LN status indices in GBCA. METHODS We retrospectively reviewed medical records of 128 patients with T2 or greater GBCA who underwent LN dissection. We analyzed overall survival (OS) and relevance of the number of metastatic LNs, ratio of metastatic LNs to retrieved LNs (LNR), and TLNC in predicting OS. RESULTS The median OS durations were 120, 35, and 18 months in T2, T3, and T4 GBCA. Five-year OS rates were 73%, 43%, and 0% in T2, T3, and T4 GBCA. LN status did not significantly impact OS in T2 or T4 GBCA. However, all LN indices were significantly correlated with OS in T3 GBCA. Furthermore, multivariate analysis revealed that a metastatic LN count of more than four and a TLNC of more than eight were independent prognostic factors of OS in T3 GBCA. CONCLUSIONS TLNC and the number of positive LNs may be more important prognostic factors than LNR in T3 GBCA. Additionally, accurate staging may not be achieved in cases of T3 GBCA if the total number of retrieved LNs is less than eight. Thus, to ensure proper staging, we recommend that surgeons harvest more than eight LNs in patients with T3 GBCA.
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Affiliation(s)
- S H Kim
- Department of Surgery, Yonsei University Wonju College of Medicine, Wonju Severance Christian Hospital, Wonju, Republic of Korea
| | - J U Chong
- Department of Surgery, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Republic of Korea
| | - J H Lim
- Department of Surgery, Yonsei University College of Medicine, Yongin Severance Hospital, Yongin, Republic of Korea
| | - G H Choi
- Department of Surgery, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Republic of Korea
| | - C M Kang
- Department of Surgery, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Republic of Korea
| | - J S Choi
- Department of Surgery, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Republic of Korea
| | - W J Lee
- Department of Surgery, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Republic of Korea
| | - K S Kim
- Department of Surgery, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Republic of Korea.
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Guan D, Lim JH, Peng L, Liu Y, Lam M, Seto E, Kao HY. Deacetylation of the tumor suppressor protein PML regulates hydrogen peroxide-induced cell death. Cell Death Dis 2014; 5:e1340. [PMID: 25032863 PMCID: PMC4123062 DOI: 10.1038/cddis.2014.185] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Revised: 03/18/2014] [Accepted: 03/26/2014] [Indexed: 12/29/2022]
Abstract
The promyelocytic leukemia protein (PML) is a tumor suppressor that is expressed at a low level in various cancers. Although post-translational modifications including SUMOylation, phosphorylation, and ubiquitination have been found to regulate the stability or activity of PML, little is known about the role of its acetylation in the control of cell survival. Here we demonstrate that acetylation of lysine 487 (K487) and SUMO1 conjugation of K490 at PML protein are mutually exclusive. We found that hydrogen peroxide (H2O2) promotes PML deacetylation and identified SIRT1 and SIRT5 as PML deacetylases. Both SIRT1 and SIRT5 are required for H2O2-mediated deacetylation of PML and accumulation of nuclear PML protein in HeLa cells. Knockdown of SIRT1 reduces the number of H2O2-induced PML-nuclear bodies (NBs) and increases the survival of HeLa cells. Ectopic expression of wild-type PML but not the K487R mutant rescues H2O2-induced cell death in SIRT1 knockdown cells. Furthermore, ectopic expression of wild-type SIRT5 but not a catalytic defective mutant can also restore H2O2-induced cell death in SIRT1 knockdown cells. Taken together, our findings reveal a novel regulatory mechanism in which SIRT1/SIRT5-mediated PML deacetylation plays a role in the regulation of cancer cell survival.
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Affiliation(s)
- D Guan
- Department of Biochemistry, School of Medicine, Case Western Reserve University, and Comprehensive Cancer Center of Case Western Reserve University, Cleveland, OH, USA
| | - J H Lim
- Department of Biochemistry, School of Medicine, Case Western Reserve University, and Comprehensive Cancer Center of Case Western Reserve University, Cleveland, OH, USA
| | - L Peng
- H Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Y Liu
- Department of Biochemistry, School of Medicine, Case Western Reserve University, and Comprehensive Cancer Center of Case Western Reserve University, Cleveland, OH, USA
| | - M Lam
- Department of Dermatology, University Hospitals Case Medical Center, Case Western Reserve University, Cleveland, OH, USA
| | - E Seto
- H Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - H-Y Kao
- Department of Biochemistry, School of Medicine, Case Western Reserve University, and Comprehensive Cancer Center of Case Western Reserve University, Cleveland, OH, USA
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Kim SB, Tsang J, Kim TY, Yap YS, Cornelio G, Gong G, Paik S, Lee S, Ng TY, Park S, Oh HS, Yau T, Lee SH, Lim JH, Choi YJ, Lee EM, Park KH, Do IG, Yeoh EM, Ro J. Abstract P4-12-28: HER2-related biomarkers in HER2+ breast cancer patients in Asia Pacific. Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p4-12-28] [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
Recent findings suggest that HER2-related molecular markers such as PTEN deletion or downregulation, PIK3CA mutation, truncated HER2 receptor (p95HER2), and tumor HER2 mRNA levels, have the potential to predict anti-HER2 treatment response. We evaluated the distribution of these biomarkers at the time of primary diagnosis and their relationship to responsiveness to lapatinib treatment in the metastatic setting in HER2+ breast cancer patients.
We conducted an observational study of female HER2+ breast cancer patients who were initiated on lapatinib treatment following recurrence or metastases in five Asia Pacific countries. Patients were enrolled between August 2010 and December 2012. Eligible patients had a tumor biopsy specimen available from their primary breast cancer diagnosis or before they started on any anti-HER2 treatment, had not been exposed to more than two lines of anti-HER2 treatment in the metastatic setting or other experimental anti-HER2 treatment, and had no other primary tumor. Biomarkers levels at primary diagnosis were measured; PTEN levels were assessed by immunohistochemistry and PIK3CA mutations were detected by a mass spectroscopy-based approach. The primary endpoint was progression-free survival (PFS) from the initiation of first lapatinib-based regimen given in metastatic setting to disease progression from that regimen or death from any cause. PFS analysis was conducted with a data cut-off date of 31 December 2012.
A total of 162 patients were included in this study and 96% have confirmed HER2+ breast cancer primary tumor. The mean age was 52±10 years and 97% had metastases at study entry, with bone being the most common site of metastasis (48%). About a quarter had PTEN protein loss (24%), 30% had PIK3CA mutation, and 7% had both at primary diagnosis. No significant association was observed between both biomarkers or between each biomarker and estrogen receptor status or HER2 status.
Table 1. Relationship between PTEN and PIK3CA PIK3CA mutation, n (%)PIK3CA wild-type, n (%)p-valuePTEN status 0.674Loss11 (29)27 (71) Normal33 (33)68 (67)
Patients with altered PTEN expression, or PIK3CA mutation showed comparable PFS with lapatinib-based treatment as those with normal PTEN or PIK3CA expression at analysis cut-off date (median PFS 7.5 and 8.5 months respectively vs. 8.9 and 9.0 months respectively; p = 0.502 and p = 0.268 respectively). There remained no significant difference in PFS after having adjusted for significant confounders (HR 1.2 and 1.1 respectively; 95% CI 0.7–1.9 and 0.7–1.8 respectively; p = 0.481 and p = 0.730 respectively). The distribution of p95HER2 expression and tumor HER mRNA levels and their association with PFS will be included at the time of presentation.
Our preliminary findings suggest that PTEN alteration, or PIK3CA mutation may not be predictive of clinical response to lapatinib treatment in HER2+ breast cancer patients. The final PFS results with additional markers will provide more clues regarding their relationship to treatment response.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P4-12-28.
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Affiliation(s)
- S-B Kim
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
| | - J Tsang
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
| | - T-Y Kim
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
| | - YS Yap
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
| | - G Cornelio
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
| | - G Gong
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
| | - S Paik
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
| | - S Lee
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
| | - T-Y Ng
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
| | - S Park
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
| | - H-S Oh
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
| | - T Yau
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
| | - SH Lee
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
| | - JH Lim
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
| | - Y-J Choi
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
| | - EM Lee
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
| | - K-H Park
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
| | - I-G Do
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
| | - E-M Yeoh
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
| | - J Ro
- Asan Medical Center, Korea; Queen Mary Hospital, Hong Kong; Seoul National University Hospital, Korea; National Cancer Center, Singapore; San Juan De Dios Hospital, Philippines; Severance Biomedical Research Institute, Yonsei University College of Medicine, Korea; Dong-A University Medical Centre, Korea; Tuen Mun Hospital, Hong Kong; Seoul St. Mary's Hospital, Korea; GangNeung Asan Hospital, Korea; Yonsei University Medical Centre, Korea; Inha University Hospital, Korea; Pusan National University Hospital, Korea; Kosin University Gospel Hospital, Korea; Korea University Anam Hospital, Korea; Samsung Medical Center, Korea; GlaxoSmithKline Pte Ltd, Singapore; National Cancer Center, Korea
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Ahmad Rather I, Seo BJ, Rejish Kumar VJ, Choi UH, Choi KH, Lim JH, Park YH. Isolation and characterization of a proteinaceous antifungal compound from Lactobacillus plantarum YML007 and its application as a food preservative. Lett Appl Microbiol 2013; 57:69-76. [PMID: 23565693 DOI: 10.1111/lam.12077] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Revised: 03/18/2013] [Accepted: 04/01/2013] [Indexed: 11/30/2022]
Abstract
UNLABELLED Korean kimchi is known for its myriad of lactic acid bacteria (LAB) with diverse bioactive compounds. This study was undertaken to isolate an efficient antifungal LAB strain among the isolated kimchi LABs. One thousand and four hundred LABs isolated from different kimchi samples were initially screened against Aspergillus niger. The strain exhibiting the highest antifungal activity was identified as Lactobacillus plantarum YML007 by 16S rRNA sequencing and biochemical assays using API 50 CHL kit. Lact. plantarum YML007 was further screened against Aspergillus oryzae, Aspergillus flavus, Fusarium oxysporum and other pathogenic bacteria. The morphological changes during the inhibition were assessed by scanning electron microscopy. Preliminary studies on the antifungal compound demonstrated its proteinaceous nature with a molecular weight of 1256·617 Da, analysed by matrix-assisted laser desorption ionization-time-of-flight mass spectrometry (MALDI-TOF). The biopreservative activity of Lact. plantarum YML007 was evaluated using dried soybeans. Spores of A. niger were observed in the negative control after 15 days of incubation. However, fungal growth was not observed in the soybeans treated with fivefold concentrated cell-free supernatant of Lact. plantarum YML007. The broad activity of Lact. plantarum YML007 against various food spoilage moulds and bacteria suggests its scope as a food preservative. SIGNIFICANCE AND IMPACT OF THE STUDY After screening 1400 kimchi bacterial isolates, strain Lactobacillus plantarum YML007 was selected with strong antifungal activity against various foodborne pathogens. From the preliminary studies, it was found that the bioactive compound is a low molecular weight novel protein of 1256·617 Da. Biopreservative potential of Lact. plantarum YML007 was demonstrated on soybean grains, and the results point out YML007 as a potent biopreservative having broad antimicrobial activity against various foodborne pathogens.
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Affiliation(s)
- I Ahmad Rather
- Department of Applied Microbiology and Biotechnology, Yeungnam University, Gyeongsan, Korea
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Rhee CK, Yoo KH, Lee JH, Park MJ, Kim WJ, Park YB, Hwang YI, Kim YS, Jung JY, Moon JY, Rhee YK, Park HK, Lim JH, Park HY, Lee SW, Kim YH, Lee SH, Yoon HK, Kim JW, Kim JS, Kim YK, Oh YM, Lee SD, Kim HJ. Clinical characteristics of patients with tuberculosis-destroyed lung. Int J Tuberc Lung Dis 2013; 17:67-75. [PMID: 23232006 DOI: 10.5588/ijtld.12.0351] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [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
SETTING Multicentre study. OBJECTIVE To define the clinical characteristics of patients with tuberculosis (TB) destroyed lung due to past TB. DESIGN We reviewed patients with TB-destroyed lung between May 2005 and June 2011. RESULTS A total of 595 patients from 21 hospitals were enrolled. The mean age was 65.63 ± 0.47 (mean ± standard error); 60.5% were male. The mean number of lobes involved was 2.59 ± 0.05. Pleural thickening was observed in 54.1% of the patients. Mean forced vital capacity (FVC), forced expiratory volume in 1 s (FEV(1)), FEV(1)/FVC, bronchodilator response and number of exacerbations per year were respectively 2.06 ± 0.03 l (61.26% ± 0.79), 1.16 ± 0.02 l (49.05% ± 0.84), 58.03% ± 0.70, 5.70% ± 0.34, and 0.40 ± 0.04. The number of lobes involved was significantly correlated with FVC and FEV(1), and with the number of exacerbations per year. Use of long-acting muscarinic antagonists or long-acting beta-2 agonists plus inhaled corticosteroids resulted in bronchodilatory effects. Multivariable regression analysis showed that age, initial FEV(1) (%) and number of exacerbations during follow-up were independent factors affecting change in FEV(1). CONCLUSION Decreased lung function with exacerbation, and progressive decline of FEV(1) were observed in patients with TB-destroyed lung.
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Affiliation(s)
- C K Rhee
- Department of Internal Medicine, Seoul St. Mary's Hospital, Catholic University of Korea, Seoul, Korea
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Lee DS, Kim YS, Lee CG, Lim JH, Suh CO, Kim HJ, Cho J. Early volumetric change and treatment outcome of metastatic brain tumors after external beam radiotherapy: differential radiotherapy for brain metastasis. Clin Transl Oncol 2013; 15:889-96. [PMID: 23408041 DOI: 10.1007/s12094-013-1016-2] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Accepted: 01/29/2013] [Indexed: 01/17/2023]
Abstract
PURPOSE To evaluate the treatment outcomes of low-dose whole brain radiation therapy (WBRT)-based differential radiation therapy (RT) for metastatic brain tumors. METHODS A total of 242 targets (metastatic brain lesions) were analyzed in the present study. Median WBRT dose and number of fractions were 25 (range 25-35) Gy and 10 (range 8-15) fractions, respectively. A median normalized total dose (NTD) of 1.8 Gy (NTD(1.8Gy)) to the metastatic lesion was 45 (range 27-64.8) Gy. We numbered and contoured each metastatic lesion sequentially using computed tomography fused with serial magnetic resonance imaging to evaluate volumetric changes. RESULTS The 6-month and 1-year freedom from remote intracranial failure rates were 87.7 and 58.5 %, respectively. The 6-month actuarial local control (LC) rate was 93.4 %. Tumor diameter was a major determinant for LC, and tumor histology was a significant parameter predicting the volume reduction rate. With overall complete response (CR) rate of 56.6 % after RT, CR rate, if the target was more than 1 cm in size, was 25 % with a median NTD(1.8Gy) of 45 Gy, requiring dose escalation to achieve better target regression. CONCLUSIONS Low-dose WBRT with selective boost was feasible and effective. Our results pose the rationale of future trial of differential radiation therapy (RT), which prescribes different radiation dose according to the tumor density in metastatic brain tumors.
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Affiliation(s)
- D S Lee
- Department of Radiation Oncology, Yonsei Cancer Center, Severance Hospital, Yonsei University Health System, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-752, South Korea
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Kim MY, Lim JH, Youn HH, Hong YA, Yang KS, Park HS, Chung S, Ko SH, Shin SJ, Choi BS, Kim HW, Kim YS, Lee JH, Chang YS, Park CW. Resveratrol prevents renal lipotoxicity and inhibits mesangial cell glucotoxicity in a manner dependent on the AMPK-SIRT1-PGC1α axis in db/db mice. Diabetologia 2013; 56:204-17. [PMID: 23090186 DOI: 10.1007/s00125-012-2747-2] [Citation(s) in RCA: 232] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Accepted: 09/03/2012] [Indexed: 12/14/2022]
Abstract
AIMS/HYPOTHESIS Many of the effects of resveratrol are consistent with the activation of AMP-activated protein kinase (AMPK), silent information regulator T1 (SIRT1) and peroxisome proliferator-activated receptor (PPAR)γ co-activator 1α (PGC-1α), which play key roles in the regulation of lipid and glucose homeostasis, and in the control of oxidative stress. We investigated whether resveratrol has protective effects on the kidney in type 2 diabetes. METHODS Four groups of male C57BLKS/J db/m and db/db mice were used in this study. Resveratrol was administered via gavage to diabetic and non-diabetic mice, starting at 8 weeks of age, for 12 weeks. RESULTS The db/db mice treated with resveratrol had decreased albuminuria. Resveratrol ameliorated glomerular matrix expansion and inflammation. Resveratrol also lowered the NEFA and triacylglycerol content of the kidney, and this action was related to increases in the phosphorylation of AMPK and the activation of SIRT1-PGC-1α signalling and of the key downstream effectors, the PPARα-oestrogen-related receptor (ERR)-1α-sterol regulatory element-binding protein 1 (SREBP1). Furthermore, resveratrol decreased the activity of phosphatidylinositol-3 kinase (PI3K)-Akt phosphorylation and class O forkhead box (FOXO)3a phosphorylation, which resulted in a decrease in B cell leukaemia/lymphoma 2 (BCL-2)-associated X protein (BAX) and increases in BCL-2, superoxide dismutase (SOD)1 and SOD2 production. Consequently, resveratrol reversed the increase in renal apoptotic cells and oxidative stress, as reflected by renal 8-hydroxy-deoxyguanosine (8-OH-dG), urinary 8-OH-dG and isoprostane concentrations. Resveratrol prevented high-glucose-induced oxidative stress and apoptosis in cultured mesangial cells through the phosphorylation of AMPK and activation of SIRT1-PGC-1α signalling and the downstream effectors, PPARα-ERR-1α-SREBP1. CONCLUSIONS/INTERPRETATION The results suggest that resveratrol prevents diabetic nephropathy in db/db mice by the phosphorylation of AMPK and activation of SIRT1-PGC-1α signalling, which appear to prevent lipotoxicity-related apoptosis and oxidative stress in the kidney.
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Affiliation(s)
- M Y Kim
- Department of Internal Medicine, Seoul St Mary's Hospital, The Catholic University of Korea, #505, Banpo-Dong, Seocho-Ku, Seoul 137-040, Republic of Korea
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Nam TW, Cho JM, Kim SI, Kim SH, Lim JH. Preliminary study for gait phases detection to develop a rehabilitation equipment for hemiplegic patients. Conf Proc IEEE Eng Med Biol Soc 2012; 2005:2425-8. [PMID: 17282727 DOI: 10.1109/iembs.2005.1616958] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Preliminary experiment for analyzing weight shift during gait phases for hemiplegic patients was carried out to develop rehabilitation equipment. A gait phase detection system using pressure sensors was developed and the experiment was carried out for eight hemiplegic patients and normal adult. The weight shift during gait phases for a normal adult showed symmetrical for left and right footing phase, but that for the hemiplegic patients showed asymmetrical footing phase. However, it gave sufficient information to discriminate between left and right footing phases.
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Affiliation(s)
- T W Nam
- Department of Biomedical Engineering, Inje University, Kimhae, 621-749 Korea
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Kim SY, Park SY, Lim JH, Lee BY, Yang JH, Ryu HM. Hypoxia inducible factor-1α gene polymorphisms in Korean patients with pre-eclampsia. J Endocrinol Invest 2012; 35:670-5. [PMID: 21979130 DOI: 10.3275/8009] [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] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND Placental hypoxia has been implicated in the pathogenesis of pre-eclampsia. Hypoxia inducible factor-1α (HIF-1α) is activated by low oxygen tension and is a key regulator of genes involved in the cellular responses to hypoxia. AIM We determined whether maternal blood c.1722C>T (Pro582Ser) and c.1790G>A (Ala588Thr) polymorphisms in exon 12 of the HIF-1α gene are associated with pre-eclampsia. SUBJECTS AND METHODS Subjects included 163 pre-eclamptic patients (48 mild and 115 severe preeclampsia) and 194 healthy pregnant women. Polymorphisms were genotyped by PCR and direct DNA sequencing. RESULTS There were no significant differences in genotype or allele frequencies of the c.1772C>T and c.1790G>A polymorphisms of the HIF-1α gene among the study groups. Moreover, subgroup analysis according to pre-eclampsia severity revealed no significant differences in genotype or allele frequencies of the HIF-1α c.1772C>T and c.1790G>A polymorphism in mild pre-eclamptic compared to severe pre-eclamptic group. In addition, there were no significant differences in the frequencies of 3 haplotypes (C-G,-G, T-G, and C-A) between the control and pre-eclamptic groups. CONCLUSIONS Our results suggest that the HIF-1α gene polymorphisms are not associated with the development of pre-eclampsia in the studied Korean women population.
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Affiliation(s)
- S Y Kim
- Laboratory of Medical Genetics, Cheil General Hospital and Women's Healthcare Center, Kwandong University College of Medicine, 1-19 Mukjeong-dong, Jung-gu, Seoul 100-380, Korea
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Seo BJ, Rather IA, Kumar VJR, Choi UH, Moon MR, Lim JH, Park YH. Evaluation of Leuconostoc mesenteroides YML003 as a probiotic against low-pathogenic avian influenza (H9N2) virus in chickens. J Appl Microbiol 2012; 113:163-71. [PMID: 22548634 DOI: 10.1111/j.1365-2672.2012.05326.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIM The aims of the study were to isolate anti-H9N2 bacteria from Korean Kimchi isolates and to evaluate its performance in cell line, egg and in specific pathogen-free (SPF) chickens. METHODS AND RESULTS Using Madin-Darby canine kidney (MDCK) cell line, 220 bacterial isolates were screened and the isolate YML003 was selected having pronounced antiviral activity against H9N2 virus. This isolate was identified as Leuconostoc mesenteroides by 16S rRNA gene sequencing. Anti-H9N2 activity of the strain was also evaluated by hemagglutination assay. Leuconostoc mesenteroides YML003 was assessed for its survival in gastric juice and 5% bile acid and the antibiotic susceptibility. Both live and heat-killed cells were selected for in vivo chicken feeding experiment. Body weight, immune index, serobiochemical parameters and splenic IFN-γ production were assessed during selected intervals. Viral population in the trachea and cloacae were calculated by quantitative real-time reverse transcriptase PCR (qRT-PCR). CONCLUSIONS Leuconostoc mesenteroides YML003 exhibited anti-H9N2 activity both in in vitro cell line as well as in vivo SPF chickens. SIGNIFICANCE AND IMPACT OF THE STUDY This is a primary report on the anti-H9N2 activity by a Leuconostoc strain. Amid the increasing reports of avian influenza virus occurrence resulting in severe losses to the poultry industry, prophylactic administration of such probiotic strains are highly significant.
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Affiliation(s)
- B J Seo
- Department of Applied Microbiology and Biotechnology, Yeungnam University, Gyongsangbuk-Do, Korea
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Lim JH, Jun BC, Song SW. Clinical Feasibility of Multiplanar Reconstruction Images of Temporal Bone CT in the Diagnosis of Temporal Bone Fracture with Otic-Capsule-Sparing Facial Nerve Paralysis. Indian J Otolaryngol Head Neck Surg 2012; 65:219-24. [PMID: 24427570 DOI: 10.1007/s12070-011-0471-8] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Accepted: 12/26/2011] [Indexed: 11/29/2022] Open
Abstract
The aim of this study is to evaluate the feasibility of multiplanar reconstructive (MPR) imaging of temporal bone CT in the diagnosis of temporal bone fracture with oticcapsule-sparing facial nerve paralysis. Twelve patients with traumatic facial nerve paralysis with otic-capsule sparing and temporal bone fractures were selected. Multiplanar reconstruction images were obtained with the V-works 4.0 software program (Cybermed, Seoul, Korea) using axial scanning of high-resolution temporal bone CT of the fracture line. The clinical profiles of the patients displaying temporal bone fractures were examined in relation to the findings. Multiplanar images of the fracture line provided information regarding the direction of the external force that fractured the temporal bone. The fracture line was more continuous in the MPR images than in the axial view. All patients showed an imaginary extended fracture line directed toward the otic capsule. The direction of the fracture line toward the middle ear cavity is important, as it may suggest insult to the otic capsule. The MPR image parallel to the fracture line of the temporal bone provides a guideline for the vector of the force that induced the fracture. Thorough investigation of the critical organs during surgical exploration is recommended if the direction of the fracture in the MPR image points toward the otic capsule in the middle ear even if the fracture line relative to the otic capsule is not well defined in the axial or CT view.
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Affiliation(s)
- J H Lim
- Department of Radiology, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 65-1 Geumoh-dong, Uijeongbu, Gyeonggi 480-717 Korea
| | - B C Jun
- Department of Otolaryngology-Head and Neck Surgery, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 65-1 Geumoh-dong, Uijeongbu, Gyeonggi 480-717 Korea
| | - S W Song
- Department of Radiology, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 65-1 Geumoh-dong, Uijeongbu, Gyeonggi 480-717 Korea
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Lee HJ, Chung K, Lee H, Lee K, Lim JH, Song J. Downregulation of mitochondrial lon protease impairs mitochondrial function and causes hepatic insulin resistance in human liver SK-HEP-1 cells. Diabetologia 2011; 54:1437-46. [PMID: 21347624 DOI: 10.1007/s00125-011-2074-z] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Accepted: 01/17/2011] [Indexed: 01/31/2023]
Abstract
AIMS/HYPOTHESIS Lon protease degrades oxidatively damaged proteins in mitochondrial matrix. To examine the relationships between mitochondrial quality control, mitochondrial functions and diabetes, we investigated whether lon protease deficiency influences insulin resistance by affecting mitochondrial function. METHODS Lon protease-specific small interfering RNA (siRNA) was transfected into human liver SK-HEP-1 cells and changes in molecules related to insulin resistance were analysed. RESULTS Reduction in lon protease was achieved using specific siRNA-induced mitochondrial dysfunction in human liver SK-HEP-1 cells. Concurrently, insulin signalling and subsequent insulin action were impaired and levels of gluconeogenic enzymes were increased by lon protein deficiency. Moreover, the activity of mitogen-activated protein kinases and transcription factors related to hepatic gluconeogenesis were elevated in LON (also known as LONP1) siRNA-transfected cells via increased intracellular reactive oxygen species production. Overproduction of lon protease restored mitochondrial function and also diminished the insulin resistance induced by treatment with cholesterol and palmitate. In addition, levels of lon protease decreased dramatically in livers of diabetic db/db mice compared with their lean mice counterparts. CONCLUSIONS/INTERPRETATION Here we have demonstrated that reduction of lon protease induced hepatic insulin resistance by lowering mitochondrial function. This is the first study to report that defects in mitochondrial protein quality control could cause insulin resistance and diabetes.
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Affiliation(s)
- H J Lee
- Division of Metabolic Diseases, Center for Biomedical Sciences, National Institute of Health, 643 Yeonje-ri, Gangoe-myeon, Cheongwon-gun, Chungcheongbuk-do 363-951, South Korea
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Hwang YH, Song IB, Lee HK, Kim TW, Kim MS, Lim JH, Park BK, Yun HI. Pharmacokinetics and bioavailability of cefquinome in rabbits following intravenous and intramuscular administration. J Vet Pharmacol Ther 2011; 34:618-20. [PMID: 21615754 DOI: 10.1111/j.1365-2885.2011.01289.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Y H Hwang
- Research Institute of Veterinary Science, Chungnam National University, Daejeon, South Korea
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Tan NM, Liu J, Wong DK, Yin F, Lim JH, Wong TY. Mixture model-based approach for optic cup segmentation. Annu Int Conf IEEE Eng Med Biol Soc 2011; 2010:4817-20. [PMID: 21097297 DOI: 10.1109/iembs.2010.5627901] [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] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Glaucoma is a leading cause of blindness with permanent damage to optic nerve head. ARGALI is an automated computer-aided diagnosis system designed for glaucoma detection via optic cup-to-disc ratio assessment. It employs several methods to determine the optic cup and disc from retinal images.
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Affiliation(s)
- N M Tan
- Institute for Infocomm Research, A*STAR, Singapore.
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Park CW, Lim JH, Youn DY, Chung S, Lim MH, Kim YK, Chang YS, Lee JH. Renal dysfunction and barttin expression in Bartter syndrome Type IV associated with a G47R mutation in BSND in a family. Clin Nephrol 2011; 75 Suppl 1:69-74. [PMID: 21269598] [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] Open
Abstract
Bartter syndrome (BS) Type IV, associated with a G47R mutation in the BSND gene, is known to result in a mild renal phenotype. However, we report here on three brothers with varying degrees of renal dysfunction from mild to end-stage renal disease associated with renal barttin and ClC-K expression. The brothers had histories of polyhydramnios, prematurity, polyuria, deafness, and small body size. Laboratory findings showed hypokalemic metabolic alkalosis, normotensive hyperreninemic hyperaldosteronism, and an increased urinary excretion of sodium, potassium and chloride, consistent with BS Type IV. Microscopic examination of renal tissue showed hyperplasia of cells at the juxtaglomerular apparatus with dilated atrophic tubules and tubulointerstitial fibrosis. A weak barttin signal related to CIC-K expression in the cytoplasm of tubule cells, but not the basement membrane, was noted. A sequence analysis of the BSND gene showed that the affected males were homozygous for a missense G47R mutation in exon 1 of BSND. These findings suggest that the G47R mutation results in a dramatic decrease in barttin expression, which appears to be related to the location of CIC-K being changed from the basement membrane to the cytoplasm in the tubule and might have varying effects on renal function associated with factors other than this gene.
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Affiliation(s)
- C W Park
- Division of Nephrology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Lim JH, Bae EH, Park SH, Lee KJ, M SR, Kwon EY, Lee YJ, Jung YT. Development of a real time RT-PCR with SYBR Green dye for the detection of several viruses from the bulbs and leaves of lily. Acta Virol 2010; 54:319-21. [PMID: 21175260 DOI: 10.4149/av_2010_04_319] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Abstract
A stochastic model is proposed to simulate the growth of anchorage dependent cells on a flat surface. The model, based on representing the cell shapes on the surface as external irregular polygons with the nuclei distributed as a set of Poisson points (producing a modified Voronoi tessellation of 2 space) and incorporating a distribution function to describe cell division of the perimeter cells of the colony, provides data not only on population dynamics but also on the patterns produced by clusters of cells in the colony. These patterns produced by the model are qualitatively similar to observations reported for some cell cultures. The periods of induction, rapid growth, and decreasing growth asymptoting to zero as confluence is reached are predicted by the model. Quantitative comparison with published experimental data for this is good. The specific growth rate computed for the period of rapid growth predicted by the model is dependent on the distribution function describing the cell division time. As the standard deviation of this increases, the specific growth rate decreases as with a consequent increase in time to achieve confluence. The removal of cells from the colony by shear forces or death is considered in the model. As the probability for removal increases, the cell density at confluence and specific growth rate decrease. The clusters of cells, patterns, in the colony are very sensitive to cell removal. By analyzing these patterns in experiments, an estimate of cell removal can be made. The areas covered by cells on a substrate are fractal patterns. The fractal dimension is always greater than 1 and is a function of the removal probability.
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Affiliation(s)
- J H Lim
- Department of Chemical Engineering, U.M.I.S.T., Manchester, England
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Tan NM, Liu J, Wong DK, Lim JH, Zhang Z, Lu S, Li H, Saw SM, Tong L, Wong TY. Automatic detection of pathological myopia using variational level set. Annu Int Conf IEEE Eng Med Biol Soc 2010; 2009:3609-12. [PMID: 19964081 DOI: 10.1109/iembs.2009.5333517] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Pathological myopia, the seventh leading cause of legal blindness in United States, is a condition caused by pathological axial elongation and eyes that deviates from the normal distribution curve of axial length, resulting in impaired vision. Studies have shown that ocular risks associated with myopia should not be underestimated, and there is a public health need to prevent the onset or progression of myopia. Peripapillary atrophy (PPA) is one of the clinical indicators for pathological myopia. In this paper, we introduce a novel method, to detect pathological myopia via peripapaillary atrophy feature by means of variational level set. This method is a core algorithm of our system, PAMELA, an automated system for the detection of pathological myopia. The proposed method has been tested on 40 images from Singapore Cohort study Of the Risk factors for Myopia (SCORM), producing a 95% accuracy of correct assessment, and a sensitivity and specificity of 0.9 and 1 respectively. The results highlight the potential of PAMELA as a possible clinical tool for objective mass screening of pathological myopia.
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Affiliation(s)
- N M Tan
- Institute for Infocomm Research, A STAR, Singapore.
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Wong DWK, Liu J, Lim JH, Tan NM, Zhang Z, Lu S, Li H, Teo MH, Chan KL, Wong TY. Intelligent fusion of cup-to-disc ratio determination methods for glaucoma detection in ARGALI. Annu Int Conf IEEE Eng Med Biol Soc 2010; 2009:5777-80. [PMID: 19963657 DOI: 10.1109/iembs.2009.5332534] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Glaucoma is a leading cause of permanent blindness. ARGALI, an automated system for glaucoma detection, employs several methods for segmenting the optic cup and disc from retinal images, combined using a fusion network, to determine the cup to disc ratio (CDR), an important clinical indicator of glaucoma. This paper discusses the use of SVM as an alternative fusion strategy in ARGALI, and evaluates its performance against the component methods and neural network (NN) fusion in the CDR calculation. The results show SVM and NN provide similar improvements over the component methods, but with SVM having a greater consistency over the NN, suggesting potential for SVM as a viable option in ARGALI.
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Affiliation(s)
- D W K Wong
- Institute for Infocomm Research, A*STAR, Singapore.
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Chung HJ, Park CJ, Lim JH, Jang S, Chi HS, Im HJ, Seo JJ. Establishment of a reference interval for natural killer cell activity through flow cytometry and its clinical application in the diagnosis of hemophagocytic lymphohistiocytosis. Int J Lab Hematol 2009; 32:239-47. [PMID: 19614711 DOI: 10.1111/j.1751-553x.2009.01177.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Recently, the Histiocyte Society revised the diagnostic criteria for hemophagocytic lymphohistiocytosis (HLH) to include low or absent natural killer (NK) cell activity, according to local laboratory reference. The aim of this study was to establish reference interval for functional NK-cell activity in 63 healthy Korean individuals using a flow-cytometric assay. We used peripheral blood mononuclear cells (PBMCs) as effector cells and Fluorescein isothiocyanate-labeled K562 cells as target cells. NK-cell activity was calculated using the following equation: NK-cell activity (%) = (test lysis - spontaneous lysis) x 100/(maximum lysis - spontaneous lysis). NK-cell activity was analyzed in 13 known HLH patients and 16 suspected non-HLH patients using a flow-cytometric assay. The mean (+/-SD) cytotoxicity of PBMCs from healthy individuals was 20.9 +/- 5.3% and the reference interval was 11.8-31.9%. The mean NK-cell activity of HLH patients (8.3 +/- 8.9%) was significantly lower (P = 0.001) than that of non-HLH patients (20.1 +/- 7.8%). The sequential changes in NK-cell activity in the HLH group corresponded to clinical and laboratory findings following treatment. We successfully developed a functional NK-cell activity test for use in the clinical laboratory and obtained a reference interval of NK-cell activity from healthy donors. This assay, and associated reference interval, was used to analyze 30 clinically relevant specimens and the results were shown to be well correlated.
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Affiliation(s)
- H J Chung
- Department of Laboratory Medicine, University of Ulsan College of Medicine and Asan Medical Center, Seoul, South Korea
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Xiong W, Lim JH, Ong SH, Tung NN, Liu J, Racoceanu D, Tan K, Chong A, Foong K. Automatic working area classification in peripheral blood smears without cell central zone extraction. Annu Int Conf IEEE Eng Med Biol Soc 2009; 2008:4074-7. [PMID: 19163607 DOI: 10.1109/iembs.2008.4650104] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In this paper we study automatic classification of working areas in peripheral blood smears using image analysis and recognition methods. Such automatic classification can provide objective and reproducible quality control for the evaluation of smears and smear maker devices. However, research in this filed has drawn little attention. Existing methods either can not differentiate correctly different cell distributions or rely on the extraction of the central pallor zones in cells for counting, which are not always observable. In contrast, we do not rely on the pallor zone extraction thus on more general basis. We introduce two generic parameters to measure the goodness of working areas, one for the degree of overlap, and the other for the spatial occupancy. We also propose a cascading classification network for the classification of different areas. The effectiveness of our method has been tested on over 150 labeled images acquired from three malaria-infected Giemsa-stained blood smears using an oil immersion 100 x objective.
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Affiliation(s)
- W Xiong
- Institute for Infocomm Research, A-STAR, Singapore. wxiong@ I2R.a-star.edu.sg
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Wong DK, Liu J, Lim JH, Jia X, Yin F, Li H, Wong TY. Level-set based automatic cup-to-disc ratio determination using retinal fundus images in ARGALI. 2008 30TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY 2008; 2008:2266-9. [PMID: 19163151 DOI: 10.1109/iembs.2008.4649648] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- D K Wong
- Institute for Infocomm Research, Agency for Science, Technology and Research, Singapore
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Kim HS, Park H, Lim JH, Choi SH, Park C, Lee SI, Conklin JL. Morphometric evaluation of oesophageal wall in patients with nutcracker oesophagus and ineffective oesophageal motility. Neurogastroenterol Motil 2008; 20:869-76. [PMID: 18452508 DOI: 10.1111/j.1365-2982.2008.01128.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [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] [Indexed: 02/08/2023]
Abstract
The pathogenesis of nutcracker oesophagus (NE) and ineffective oesophageal motility (IEM) is unclear. Damage to the enteric nervous system or smooth muscle can cause oesophageal dysmotility. We tested the hypothesis that NE and IEM are associated with abnormal muscular or neural constituents of the oesophageal wall. Oesophageal manometry was performed in patients prior to total gastrectomy for gastric cancer. The oesophageal manometries were categorized as normal (n = 7), NE (n = 13), or IEM (n = 5). Histologic examination of oesophageal tissue obtained during surgery was performed after haematoxylin and eosin (H&E) and trichrome staining. Oesophageal innervation was examined after immunostaining for protein gene product-9.5 (PGP-9.5), choline acetyltransferase (ChAT) and neuronal nitric oxide synthase (nNOS). There were no significant differences in inner circular smooth muscle thickness or degree of fibrosis among the three groups. Severe muscle fibre loss was found in four of five patients with IEM. The density of PGP-9.5-reactive neural structures was not different among the three groups. The density of ChAT immunostaining in the myenteric plexus (MP) was significantly greater in patients with NE (P < 0.05) and the density of nNOS immunostaining in the circular muscle (CM) was significantly greater in IEM patients (P < 0.05). The ChAT/nNOS ratio in both MP and CM was significantly greater in NE patients. NE may result from an imbalance between the excitatory and inhibitory innervation of the oesophagus, because more than normal numbers of ChAT-positive myenteric neurones are seen in NE. Myopathy and/or increased number of nNOS neurones may contribute to the hypocontractile motor activity of IEM.
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Affiliation(s)
- H S Kim
- Department of Internal Medicine, Institute of Gastroenterology, Yonsei University College of Medicine, Seoul, Korea
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Kwon S, Kang DM, Kim SY, Sa KJ, Lee CG, Lim JH, Jee YK, Ha MN, Hong SJ, Hong YC, Kwon HJ, Oh SY. Dietary factors in relation to atopic dermatitis among urban school‐aged children in Korea. FASEB J 2008. [DOI: 10.1096/fasebj.22.1_supplement.876.5] [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] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sung‐Ok Kwon
- Food and NutritionKyunghee Univ.SeoulRepublic of Korea
| | - DM Kang
- Pusan Nat'l Univ.PusanRepublic of Korea
| | - SY Kim
- Cheju Nat'l Univ.ChejuRepublic of Korea
| | - KJ Sa
- Yeungnam Univ.GyeongsanRepublic of Korea
| | - CG Lee
- Chosun Univ.GwangjuRepublic of Korea
| | - JH Lim
- Inha Univ.IncheonRepublic of Korea
| | - YK Jee
- Dankook Univ.CheonanRepublic of Korea
| | - MN Ha
- Dankook Univ.CheonanRepublic of Korea
| | - SJ Hong
- Ulsan Univ.SeoulRepublic of Korea
| | - YC Hong
- Seoul Nat'l Univ.SeoulRepublic of Korea
| | - HJ Kwon
- Dankook Univ.CheonanRepublic of Korea
| | - SY Oh
- Food and NutritionKyunghee Univ.SeoulRepublic of Korea
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Jeong EY, Lim JH, Kim HG, Lee HS. Acaricidal activity of Thymus vulgaris oil and its main components against Tyrophagus putrescentiae, a stored food mite. J Food Prot 2008; 71:351-5. [PMID: 18326186 DOI: 10.4315/0362-028x-71.2.351] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The acaricidal activities of compounds derived from Thymus vulgaris (thyme) oil against Tyrophagus putrescentiae were assessed using an impregnated fabric disk bioassay, and were compared with those of the synthetic acaricides, benzyl benzoate and N,N-diethyl-m-toluamide. The observed responses differed according to dosage and chemical components. The 50% lethal dose (LD50) value of the T. vulgaris oil against T. putrescentiae was 10.2 microg/cm2. Biologically active constituents derived from T. vulgaris oil were purified by using silica gel chromatography and high-performance liquid chromatography. The structures of acaricidal components were analyzed by gas chromatography-mass spectrometry, 1H nuclear magnetic resonance (NMR), 13C NMR, 1H-13C COSY-NMR, and DEPT-NMR spectra, and were subsequently identified as carvacrol and thymol. Carvacrol was the most toxic compound with LD50 values (4.5 microg/cm2) significantly different from thymol (11.1 microg/cm2), benzyl benzoate (11.3 microg/cm2), and N,N-diethyl-m-toluamide (13.9 microg/cm2). Linalool was as toxic as was N,N-diethyl-m-toluamide. The lower LD50 of carvacrol indicates that it may be the major contributor of the toxicity of T. vulagaris oil against the stored food mite, although it only constitutes 14.2% of the oil. From this point of view, carvacrol and thymol can be very useful as potential control agents against stored food mite.
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Affiliation(s)
- E Y Jeong
- Faculty of Biotechnology and Center for Agricultural Science & Technology, College of Agriculture & Life Science, Chonbuk National University, Chonju 561-756, South Korea
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