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Park C, Park NR, Kwon J, Kim H, Gogotsi Y, Koo CM, Kim MK. Ultrahigh Nonlinear Responses from MXene Plasmons in the Short-Wave Infrared Range. Adv Mater 2024:e2309189. [PMID: 38530975 DOI: 10.1002/adma.202309189] [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] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 02/23/2024] [Indexed: 03/28/2024]
Abstract
Surface plasmons in 2D materials such as graphene exhibit exceptional field confinement. However, the low electron density of majority of 2D materials, which are semiconductors or semimetals, has limited their plasmons to mid-wave or long-wave infrared regime. This study demonstrates that a 2D Ti3C2Tx MXene with high electron density can not only support strong plasmon confinement with an acoustic plasmon mode in the short-wave infrared region, but also provide ultrahigh nonlinear responses. The acoustic MXene plasmons (AMPs) in the MXene (Ti3C2Tx)-insulator (SiO2)-metal (Au) nanostructure generate in the 1.5-6.0 µm wavelength range, exhibiting a two orders of magnitude reduction in wavelength compared to wavelength in free space. Furthermore, AMP resonators with patterned Au rods exhibit a record-high nonlinear absorption coefficient of 1.37 × 10-2 m W-1 at wavelength of 1.56 µm, ≈3 orders of magnitude greater than the highest value recorded for other 2D materials. These results indicate that MXenes can overcome fundamental plasmon wavelength limitations of previously studied 2D materials, providing groundbreaking opportunities in nonlinear optical applications, including all-optical processing and ultrafast optical switching.
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Affiliation(s)
- Changhoon Park
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Nu-Ri Park
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Jisung Kwon
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Hyerim Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon-si, 16419, Republic of Korea
- School of Chemical Engineering, Sungkyunkwan University, Suwon-si, 16419, Republic of Korea
| | - Yury Gogotsi
- A. J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USA
| | - Chong Min Koo
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon-si, 16419, Republic of Korea
- School of Chemical Engineering, Sungkyunkwan University, Suwon-si, 16419, Republic of Korea
| | - Myung-Ki Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
- Center for Quantum Information, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
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Park JM, Han SH, Cho BC, Lee SM, Shin MS, Yu JH, Kim HJ, Noh HD, Cho MS, Kim MK. Enhancing Post-Surgical Rehabilitation Outcomes in Patients with Chronic Ankle Instability: Impact of Subtalar Joint Axis Balance Exercises Following Arthroscopic Modified Broström Operation. Medicina (Kaunas) 2024; 60:328. [PMID: 38399615 PMCID: PMC10890246 DOI: 10.3390/medicina60020328] [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] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 02/08/2024] [Accepted: 02/11/2024] [Indexed: 02/25/2024]
Abstract
Background and Objectives: This study aimed to evaluate the effects of subtalar joint axis-based balance exercises on the anterior talofibular ligament (ATFL) thickness, ankle strength, and ankle stability after an arthroscopic modified Broström operation (AMBO) for chronic ankle instability (CAI). Materials and Methods: The study included 47 patients diagnosed with CAI who underwent AMBO and were randomly divided into three groups: control (n = 11), general balance exercise (n = 17), and subtalar joint axis balance exercise (n = 19), regardless of the affected area. Participants in the exercise rehabilitation group performed exercises for 60 min twice a week for six weeks, starting six weeks after AMBO. ATFL thickness, ankle strength, and ankle dynamic stability were measured using musculoskeletal ultrasonography, Biodex, and Y-balance test, respectively, before and after treatment. Results: Compared with the remaining groups, the subtalar joint axis balance exercise group had reduced ATFL thickness (p = 0.000), improved ankle strength for eversion (p = 0.000) and inversion (p = 0.000), and enhanced ankle stability (p = 0.000). Conclusions: The study results suggest that subtalar joint axis-based balance exercises may contribute to the early recovery of the ankle joint after AMBO.
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Affiliation(s)
- Ji-Myeong Park
- Sports Medical Research Center, Daechan Hospital, 590 Inju-daero, Namdong-gu, Incheon 21570, Republic of Korea; (J.-M.P.); (S.-H.H.); (H.-D.N.)
| | - Sang-Ho Han
- Sports Medical Research Center, Daechan Hospital, 590 Inju-daero, Namdong-gu, Incheon 21570, Republic of Korea; (J.-M.P.); (S.-H.H.); (H.-D.N.)
| | - Byeong-Chae Cho
- Nowon Samsung Orthopedics, 456 Nohae-ro, Nowon-gu, Seoul 01762, Republic of Korea; (B.-C.C.); (S.-M.L.)
| | - Se-Min Lee
- Nowon Samsung Orthopedics, 456 Nohae-ro, Nowon-gu, Seoul 01762, Republic of Korea; (B.-C.C.); (S.-M.L.)
| | - Mal-Soon Shin
- Department of Global Sport Studies, Korea University, 2511 Sejong-ro, Jochiwon-eup, Sejong 30019, Republic of Korea;
| | - Jae-Ho Yu
- Department of Physical Therapy, Sunmoon University, 70, Seonmun-ro 221beon-gil, Tangjeong-myeon, Asan-si 31460, Republic of Korea;
| | - Ho-Jin Kim
- Department of Sports and Exercise Medicine, Biomedical Science, Korea University, 2511 Sejong-ro, Jochiwon-eup, Sejong 30019, Republic of Korea; (H.-J.K.); (M.-S.C.)
| | - Hyun-Dong Noh
- Sports Medical Research Center, Daechan Hospital, 590 Inju-daero, Namdong-gu, Incheon 21570, Republic of Korea; (J.-M.P.); (S.-H.H.); (H.-D.N.)
| | - Min-Suk Cho
- Department of Sports and Exercise Medicine, Biomedical Science, Korea University, 2511 Sejong-ro, Jochiwon-eup, Sejong 30019, Republic of Korea; (H.-J.K.); (M.-S.C.)
| | - Myung-Ki Kim
- Department of Global Sport Studies, Korea University, 2511 Sejong-ro, Jochiwon-eup, Sejong 30019, Republic of Korea;
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Kim TW, Park SS, Kim SH, Kim MK, Shin MS, Kim SH. Exercise before pregnancy exerts protective effect on prenatal stress-induced impairment of memory, neurogenesis, and mitochondrial function in offspring. J Exerc Rehabil 2024; 20:2-10. [PMID: 38433854 PMCID: PMC10902695 DOI: 10.12965/jer.2448068.034] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Revised: 01/25/2024] [Accepted: 02/02/2024] [Indexed: 03/05/2024] Open
Abstract
Stress during pregnancy has a negative effect on the fetus. However, maternal exercise has a positive effect on the cognitive function of the fetus and alleviates the negative effects of stress. This study aimed to demonstrate whether exercise before pregnancy has a protective effect on prenatal stress-induced impairment of memory, neurogenesis and mitochondrial function in mice offspring. In this experiment, immunohistochemistry, Western blot, measurement of mitochondria oxygen respiration, and behavior tests were performed. Spatial memory and short-term memory of the offspring from the prenatal stress with exercise were increased compared to the offspring from the prenatal stress. The numbers of doublecortin-positive and 5-bromo-2'-deoxyuridine-positive cells in the hippocampal dentate gyrus of the offspring from the prenatal stress with exercise were higher compared to the offspring from the prenatal stress. The expressions of brain-derived neurotrophic factor, postsynaptic density 95 kDa, and synaptophysin in the hippocampus of the offspring from the prenatal stress with exercise were enhanced compared to the offspring from the prenatal stress. Oxygen consumption of the offspring from the prenatal stress with exercise were higher compared to the offspring from the prenatal stress. Exercise before pregnancy alleviated prenatal stress-induced impairment of memory, neurogenesis, and mitochondrial function. Therefore, exercise before pregnancy may have a protective effect against prenatal stress of the offspring.
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Affiliation(s)
- Tae-Woon Kim
- Department of Human Health Care, Gyeongsang National University, Jinju,
Korea
| | - Sang-Seo Park
- Department of Physiology, College of Medicine, Kyung Hee University, Seoul,
Korea
| | - Sang-Hoon Kim
- Department of Sport and Health Sciences, College of Art and Culture, Sangmyung University, Seoul,
Korea
- Department of Neurosurgery, Robert Wood Johnson Medical School, Rutgers, The State University of New Jersey, Piscataway, NJ,
USA
| | - Myung-Ki Kim
- College of Culture and Sports, Division of Global Sport Studies, Korea University, Sejong,
Korea
| | - Mal-Soon Shin
- College of Culture and Sports, Division of Global Sport Studies, Korea University, Sejong,
Korea
| | - Seong-Hyun Kim
- Department of Kinesiology, Michigan State University, East Lansing, MI,
USA
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Ahn MH, Ku BD, Kim MK. Successful subclavian artery stenting in a patient with subclavian steal syndrome associated with contralateral vertebral artery hypoplasia. J Postgrad Med 2023; 69:245-246. [PMID: 37675663 PMCID: PMC10846804 DOI: 10.4103/jpgm.jpgm_44_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 06/29/2023] [Accepted: 07/01/2023] [Indexed: 09/08/2023] Open
Affiliation(s)
- MH Ahn
- Department of Medicine, International St. Mary’s Hospital, Catholic Kwandong University College of Medicine, Incheon, South Korea
| | - BD Ku
- Department of Neurology, International St. Mary’s Hospital, Catholic Kwandong University College of Medicine, Incheon, South Korea
| | - MK Kim
- Department of Cardiology, International St. Mary’s Hospital, Catholic Kwandong University College of Medicine, Incheon, South Korea. E-mail:
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Park YJ, Na SJ, Kim MK. Effect of progressive resistance exercise using Thera-band on edema volume, upper limb function, and quality of life in patients with breast cancer-related lymphedema. J Exerc Rehabil 2023; 19:105-113. [PMID: 37163184 PMCID: PMC10164527 DOI: 10.12965/jer.2346046.023] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 02/14/2023] [Indexed: 05/11/2023] Open
Abstract
This study aimed to determine the effects of progressive resistive exercise (PRE), including complex decongestive physical therapy (CDPT), on edema volume, handgrip strength, upper extremity function, and quality of life (QoL) in patients with breast cancer-related lymphedema (BCRL). Twenty patients were randomized between the progressive resistance exercise group (PREG) and the self-home resistance exercise group (SREG). Two patients in each group dropped out of the study, leaving 16 patients: n=8 in the exercise group and n=8 in the SREG. First, the PREG and the SREG received CDPT. Subsequently, the patients in the PREG performed PRE, whereas the patients in the SREG performed self-home resistance exercises. Interventions were performed for 50 min, 3 times a week, for 6 weeks. The results showed that, for the edema volume, a significant intergroup variation was absent, whereas the intragroup variation was significant. The inter- and intragroup variations were significant for both handgrip strength and upper extremity function. Regarding QoL, a significant difference was observed in global health status/QoL and role function between the groups. Furthermore, significant differences were observed within the PREG in global health status/QoL; physical, role, and cognitive function; and dyspnea. No significant differences were observed within the SREG. The results collectively suggest that the exercise program was an intervention with a greater potential contribution to reducing edema and enhancing physical function in patients with BCRL.
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Affiliation(s)
- Yun-Jin Park
- Department of Health Rehabilitation, Osan University, Osan,
Korea
| | - Song-Ju Na
- Department of Rehabilitation Medicine, Yeouido St. Mary’s Hospital, Seoul,
Korea
| | - Myung-Ki Kim
- School of Global Sport Studies, Korea University, Sejong,
Korea
- Corresponding author: Myung-Ki Kim, School of Global Sport Studies, Korea University, 2511 Sejong-ro, Jochiwon-eup, Sejong 30019, Korea,
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Ha J, Kim J, Jeong C, Lim Y, Kim MK, Kwon HS, Song KH, Kang MI, Baek KH. Effect of follow-up raloxifene therapy after denosumab discontinuation in postmenopausal women. Osteoporos Int 2022; 33:1591-1599. [PMID: 35376989 PMCID: PMC8978765 DOI: 10.1007/s00198-022-06388-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 03/25/2022] [Indexed: 12/31/2022]
Abstract
UNLABELLED Follow-up raloxifene therapy after denosumab discontinuation resulted in a decrease in bone mass to the pre-denosumab levels and a rebound increase of bone turnover markers. The decrease in lumbar bone mineral density was particularly evident when the body mass index was low, there were previous vertebral fractures, or lumbar bone mineral density before denosumab administration was low. INTRODUCTION Selective estrogen receptor modulators may be an alternative to bisphosphonates for treating rebound resorption after discontinuing denosumab. This study aimed to investigate the effects of follow-up raloxifene therapy after denosumab discontinuation in postmenopausal women. METHODS This retrospective observational study included 61 patients who received 12-month follow-up raloxifene therapy after denosumab discontinuation. The primary endpoint was the bone mineral density change. The secondary endpoints were the changes in bone turnover markers and the incidence of new vertebral fractures. RESULTS Raloxifene administration for 12 months after denosumab discontinuation resulted in a significantly lower bone mineral density at all sites compared to the level at 6 months after the last denosumab treatment (lumbar spine, - 5.48%; femoral neck, - 2.95%; total hip, - 3.52%; all, p < 0.001). The decrease in lumbar bone mineral density was particularly evident when the body mass index was low, there were previous vertebral fractures, or lumbar bone mineral density before denosumab administration was low. Marked increases in the bone turnover markers from baseline were noted after switching to raloxifene. However, no new vertebral fractures occurred during raloxifene treatment. CONCLUSIONS Follow-up raloxifene therapy after denosumab discontinuation resulted in a decrease in bone mass to the pre-denosumab levels and a rebound increase of bone turnover markers. Therefore, raloxifene administered sequentially after denosumab discontinuation was not effective in preventing rebound phenomenon.
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Affiliation(s)
- J Ha
- Department of Internal Medicine, Division of Endocrinology and Metabolism, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - J Kim
- Department of Internal Medicine, Division of Endocrinology and Metabolism, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - C Jeong
- Department of Internal Medicine, Division of Endocrinology and Metabolism, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Republic of Korea
| | - Y Lim
- Department of Internal Medicine, Division of General Internal Medicine, National University Bundang Hospital, Seongnam, Republic of Korea
| | - M K Kim
- Department of Internal Medicine, Division of Endocrinology and Metabolism, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - H-S Kwon
- Department of Internal Medicine, Division of Endocrinology and Metabolism, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - K-H Song
- Department of Internal Medicine, Division of Endocrinology and Metabolism, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - M I Kang
- Department of Internal Medicine, Division of Endocrinology and Metabolism, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - K-H Baek
- Department of Internal Medicine, Division of Endocrinology and Metabolism, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
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Yoon SH, Choi B, Eun S, Bae GE, Koo CM, Kim MK. Using the lactate-to-albumin ratio to predict mortality in patients with sepsis or septic shock: a systematic review and meta-analysis. Eur Rev Med Pharmacol Sci 2022; 26:1743-1752. [PMID: 35302224 DOI: 10.26355/eurrev_202203_28244] [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] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
OBJECTIVE This study aimed to investigate whether the lactate-to-albumin ratio (LAR) can predict mortality in patients with sepsis or septic shock. PATIENTS AND METHODS A systematic search of the PubMed, EMBASE, Web of Science, and Google Scholar databases was conducted on December 16, 2021, for relevant articles that provided the predictive performance of LAR for mortality in patients with sepsis or septic shock. RESULTS Eight studies encompassing a total of 4,723 patients were included in this paper. The pooled sensitivity, specificity, and diagnostic odds ratio of the LAR for predicting mortality were 0.71 (95% confidence interval [CI]: 0.54-0.84), 0.68 (95% CI: 0.58-0.76) and 5.23 (95% CI: 2.62-10.45), respectively. The area under the summary receiver operating characteristic curve was 0.74 (95% CI: 0.70-0.78). CONCLUSIONS The current evidence suggests that LAR is moderately predictive of mortality among patients with sepsis or septic shock and may be beneficial to identify high-risk patients.
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Affiliation(s)
- S H Yoon
- Department of Pediatrics, Severance Children's Hospital, Yonsei University College of Medicine, Seoul, Korea.
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Park SS, Park HS, Kim CJ, Baek SS, Park SY, Anderson CP, Kim MK, Park IR, Kim TW. Combined effects of Aerobic exercise and 40Hz light flicker exposure on early cognitive impairments in Alzheimer's disease of 3xTg mice. J Appl Physiol (1985) 2022; 132:1054-1068. [PMID: 35201933 DOI: 10.1152/japplphysiol.00751.2021] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Alzheimer's disease (AD) is a progressive degenerative brain disease and the primary cause of dementia. At an early stage, AD is generally characterized by short-term memory impairment, owing to dysfunctions of the cortex and hippocampus. We previously reported that a combination of exercise and 40 Hz light flickering can protect against AD-related neuroinflammation, gamma oscillations, reduction in Aβ, and cognitive decline. Therefore, we sought to extend our previous findings to the 5-month-old 3xTg-AD mouse model to examine whether the same favorable effects occur in earlier stages of cognitive dysfunction. We investigated the effects of 12 weeks of exercise combined with 40-Hz light flickering on cognitive function by analyzing neuroinflammation, mitochondrial function, and neuroplasticity in the hippocampus in a 3xTg-AD mouse model. 5-month-old 3xTg-AD mice performed 12 weeks of exercise with 40-Hz light flickering administered independently and in combination. Spatial learning and memory, long-term memory, hippocampal Aβ, tau, neuroinflammation, pro-inflammatory cytokine expression, mitochondrial function, and neuroplasticity, were analyzed. Aβ and tau proteins levels were significantly reduced in the early stage of AD, resulting in protection against cognitive decline by reducing neuroinflammation and pro-inflammatory cytokines. Furthermore, mitochondrial function improved, apoptosis was reduced, and synapse-related protein expression increased. Overall, exercise with 40-Hz light flickering was significantly more effective than exercise or 40-Hz light flickering alone, and the improvement was comparable to the levels in the non-transgenic aged-match control group. Our results indicate a synergistic effect of exercise and 40-Hz light flickering on pathological improvements in the hippocampus during early AD associated cognitive impairment.
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Affiliation(s)
- Sang-Seo Park
- School of Health and Kinesiology, University of Nebraska at Omaha, Nebraska, United States
| | - Hye-Sang Park
- Department of Physiology, College of Medicine, KyungHee University, Seoul, Republic of Korea
| | - Chang-Ju Kim
- Department of Physiology, College of Medicine, KyungHee University, Seoul, Republic of Korea
| | - Seung-Soo Baek
- Department of Exercise and Health Science, Sangmyung University, Seoul, Republic of Korea
| | - Song-Young Park
- School of Health and Kinesiology, University of Nebraska at Omaha, Nebraska, United States
| | - Cody Philip Anderson
- School of Health and Kinesiology, University of Nebraska at Omaha, Nebraska, United States
| | - Myung-Ki Kim
- Division of Global Sport Studies, Korea University, Sejong, Republic of Korea
| | - Ik-Ryeul Park
- Department of Human Health care, Gyeongsang National University, Jinju, Republic of Korea
| | - Tae-Woon Kim
- Department of Human Health care, Gyeongsang National University, Jinju, Republic of Korea
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Seo YG, Kim MK, Sung J, Jeong DS. Can exercise-based cardiac rehabilitation increase physical activity in patients who have undergone total thoracoscopic ablation? Rev Cardiovasc Med 2021; 22:1595-1601. [PMID: 34957800 DOI: 10.31083/j.rcm2204165] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 09/14/2021] [Accepted: 09/15/2021] [Indexed: 11/06/2022] Open
Abstract
Evidence of the effect of exercise therapy in patients who have undergone total thoracoscopic ablation is lacking. This study aimed to evaluate the effects of eight weeks exercise-based cardiac rehabilitation on cardiopulmonary fitness and adherence to exercise in patients who underwent total thoracoscopic ablation and followed a regimen of exercise therapy. Twenty-four patients were involved in the study and were divided into two groups. The exercise group underwent exercise therapy, which included aerobic and resistance exercises, twice a week as part of an eight weeks hospital-based outpatient cardiac rehabilitation program. Cardiopulmonary exercise test was used to evaluate exercise capacity and the International Physical Activity Questionnaire was utilized to identify the amount of physical activity and confirm adherence to exercise at six months postoperatively. There were significant differences between the groups in moderate activity level (p = 0.004) and extent of total physical activity (p = 0.0001). Complications such as recurrent atrial fibrillation did not occur during the exercise training. Exercise-based cardiac rehabilitation was beneficial in maintaining the activity level at six months postoperatively. Early exercise intervention at four weeks post-surgical ablation is a safe and effective therapy that can increase physical activity. Further studies are needed to verify the effect of exercise intervention in a larger sample size of patients who have undergone total thoracoscopic ablation.
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Affiliation(s)
- Yong-Gon Seo
- Division of Sports Medicine, Department of Orthopedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 06351 Seoul, Republic of Korea
| | - Myung-Ki Kim
- Department of School of Global Sports Studies, Social Physical Education, Korea University, 30019 Sejong, Republic of Korea
| | - Jidong Sung
- Division of Cardiology, Department of Internal Medicine, Cardiac Center, Heart Stroke & Vascular Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, 06351 Seoul, Republic of Korea
| | - Dong-Seop Jeong
- Department of Thoracic and Cardiovascular Surgery, Cardiovascular Imaging Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, 06351 Seoul, Republic of Korea
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Eun S, Ho IG, Bae GE, Kim H, Koo CM, Kim MK, Yoon SH. Neutrophil-to-lymphocyte ratio for the diagnosis of pediatric acute appendicitis: a systematic review and meta-analysis. Eur Rev Med Pharmacol Sci 2021; 25:7097-7107. [PMID: 34859875 DOI: 10.26355/eurrev_202111_27263] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Acute appendicitis (AA) is one of the most common surgical emergencies and causes of acute abdominal pain in the pediatric population. However, it can be difficult to diagnose in children. We aimed to provide updated evidence on the diagnostic utility of the neutrophil-to-lymphocyte ratio (NLR) for AA, along with other conventional biomarkers, in pediatric patients. MATERIALS AND METHODS We searched the PubMed, Embase, Cochrane Library, and Web of Science databases for eligible articles published up to May 16, 2021. RESULTS We included 19 studies comprising a total of 5,974 pediatric cases. The overall sensitivity and specificity of the NLR were 0.82 (95% confidence interval [CI]: 0.79-0.85) and 0.76 (95% CI: 0.69-0.81), respectively. The overall diagnostic odds ratio was 14.34 (95% CI: 9.05-22.73). The area under the summary receiver operating characteristic curve was 0.86 (95% CI: 0.83-0.89). The pooled sensitivity and specificity of other biomarkers were as follows: 0.79 (95% CI: 0.71-0.86) and 0.66 (95% CI: 0.54-0.77) for the white blood cell count, 0.73 (95% CI: 0.69-0.77) and 0.68 (95% CI: 0.55-0.79) for the C-reactive protein level, 0.75 (95% CI: 0.65-0.82) and 0.78 (95% CI: 0.72-0.83) for the absolute neutrophil count, and 0.83 (95% CI: 0.79-0.87) and 0.68 (95% CI: 0.53-0.80) for the neutrophil percentage, respectively. CONCLUSIONS The NLR has moderate predictive power for AA and can be used as a simple, auxiliary tool for diagnosis. NLR can also help clinicians decide whether to perform imaging testing when the clinical symptoms or physical examination findings are vague.
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Affiliation(s)
- S Eun
- Department of Pediatrics, Severance Children's Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea.
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Ha J, Jeong C, Han KD, Lim Y, Kim MK, Kwon HS, Song KH, Kang MI, Baek KH. Comparison of fracture risk between type 1 and type 2 diabetes: a comprehensive real-world data. Osteoporos Int 2021; 32:2543-2553. [PMID: 34333678 DOI: 10.1007/s00198-021-06032-z] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 06/11/2021] [Indexed: 12/24/2022]
Abstract
UNLABELLED Population-based cohort study of 6,548,784 Korean subjects demonstrates that the risk of fracture was higher in patients with diabetes than in nondiabetic subjects. Furthermore, patients with type 1 diabetes were associated with a higher risk of fracture than patients with type 2 diabetes for all measurement sites. INTRODUCTION Diabetes mellitus is associated with increased fracture risk. Although the pathophysiologic effect on bone metabolism differs according to the type of diabetes, a higher risk of fracture in patients with diabetes than in nondiabetic patients has been consistently demonstrated. Considering the ever-increasing number of patients with diabetes, we aimed to provide updated information on whether this phenomenon remains valid in real-world settings by using large-scale population datasets. METHODS We conducted a retrospective longitudinal study using data from the Korean National Health Insurance Service dataset of preventive health check-ups between January 2009 and December 2016. The hazard ratios were calculated for any fracture, vertebral fracture, and hip fracture and were analyzed according to the presence and type of diabetes. Among 10,585,818 subjects, 6,548,784 were eligible for the analysis (2418 patients with type 1 diabetes mellitus [T1DM] and 506,208 patients with type 2 diabetes mellitus [T2DM]). RESULTS The mean follow-up duration (in years) was 7.0 ± 1.3 for subjects without diabetes, 6.4 ± 2.0 for those with T1DM, and 6.7 ± 1.7 for T2DM. Patients with T1DM had a higher incidence rate for all types of fractures per 1000 person-years. The fully adjusted hazard ratios (HRs) for any fracture, vertebral fracture, and hip fracture were higher in T1DM than in T2DM (1.37 [95% confidence interval (CI): 1.23-1.52] for any fracture, 1.33 [95% CI: 1.09-1.63] for vertebral fracture, and 1.99 [95% CI: 1.56-2.53] for hip fracture). CONCLUSIONS In this large-scale population analysis, diabetes was associated with a higher risk of all types of fractures. Patients with T1DM had a higher risk of fracture than those with T2DM for all measurement sites, and hip fractures had the highest risk. Therefore, fracture prevention training for patients with diabetes is advisable.
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Affiliation(s)
- J Ha
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - C Jeong
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - K-D Han
- Department of Statistics and Actuarial Science, Soongsil University, Seoul, Republic of Korea
| | - Y Lim
- Division of General Internal Medicine, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - M K Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - H-S Kwon
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - K-H Song
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - M I Kang
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - K-H Baek
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
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12
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Lee H, Kang G, Moon H, Lee J, Kang M, Kim MK. Interventional benefit of Pilates using Oov and mat on middle-aged women with lower urinary tract symptoms: emphasis on abdominal muscle thickness and muscular function. J Exerc Rehabil 2021; 17:192-197. [PMID: 34285897 PMCID: PMC8257440 DOI: 10.12965/jer.2142240.120] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 05/02/2021] [Indexed: 11/29/2022] Open
Abstract
Lower urinary tract symptoms (LUTS) have been considered as clinically prevalent symptom in women, and can be ameliorated by the change of abdominal muscles and pelvic floor muscle (PFM). This study investigated the efficacy of Pilates program using Oov and mat on the change of abdominal muscle thickness, PFM function, and LUTS clinical score. 53 women experiencing LUTS were randomly assigned to Oov Pilates exercise group (OPEG) (n=20), mat Pilates exercise group (MPEG) (n= 16), and symptomatic control group (SCG) (n=17), respectively, and two groups using Oov and mat participated in 8-week Pilates program. Thickness of abdominal muscle, functional movement of PFM, and LUTS clinical score were measured from all groups. Thickness of rectus abdominis, internal oblique abdominis, transversus abdominis was significantly improved in OPEG (P<0.05), however, MPEG showed a significant change only in transversus abdominis (P<0.05). In all abdominal muscles, OPEG had a significantly improved abdominal muscle thickness compared to SCG (P<0.05). Functional movement of PFM in OPEG was significantly decreased (P<0.005), but not in MPEG and SCG. In LUTS clinical score, OPEG and MPEG showed a significantly abated symptoms in degree of voiding-related symptoms and discomfort (P<0.005), but not in SCG. Our study highlighted that Pilates using Oov can be an effective intervention to ameliorate the quantitative quality of abdominal muscle thickness and PFM, which ultimately provides the satisfied self-clinical index in degree of voiding-related symptoms and discomfort.
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Affiliation(s)
- Haelim Lee
- Department of Sports Medicine, College of Health Science, CHA University, Pocheon, Korea
| | - Gyumin Kang
- School of Bio-Medical Science, Korea University, Sejong, Korea
| | - Hyunghoon Moon
- Department of Sports Medicine, College of Health Science, CHA University, Pocheon, Korea
| | - Junmin Lee
- Department of Physical and Occupational Therapy, Korea National Rehabilitation Center, Seoul, Korea
| | | | - Myung-Ki Kim
- School of Global Sport Studies, Korea University, Sejong, Korea
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13
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Jeong HW, Kim MK, Yi HJ, Kim DM, Jeon SJ, Lee HK, Oh YH, Hwang YO. Hepatitis A virus strains identified in jogaejeot associated with outbreaks in Seoul, South Korea. Lett Appl Microbiol 2021; 73:107-112. [PMID: 33797771 DOI: 10.1111/lam.13482] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 02/23/2021] [Accepted: 03/25/2021] [Indexed: 12/15/2022]
Abstract
Jogaejeot, seasoned Venerupis philippinarum, is a traditional Korean fermented food, and hepatitis A virus (HAV) can be transmitted through contaminated food, especially bivalve shellfish, causing acute gastroenteritis worldwide. Here, we carried out a phylogenetic analysis to identify and characterize HAV strains in jogaejeot samples associated with hepatitis A (HA) outbreaks in Seoul, South Korea, in 2019. The HAV strains were identified using blast and molecular analysis of the amplified HAV VP1-P2B genome region. The HAV strains identified in the five jogaejeot samples shared at least 99% sequence identity, were all classified as genotype IA and were most closely related to strains that are widespread in East Asia. These results support a link between the consumption of jogaejeot and the HA outbreaks observed in 2019 in Seoul. In addition, they indicate a need for more stringent enforcement of food safety regulations for the shellfish industry, especially against HAV, and the value of widespread vaccination.
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Affiliation(s)
- H W Jeong
- Seoul Metropolitan Government Research Institute of Public Health and Environment, Gyeonggi-do, Korea
| | - M K Kim
- Seoul Metropolitan Government Research Institute of Public Health and Environment, Gyeonggi-do, Korea
| | - H J Yi
- Seoul Metropolitan Government Research Institute of Public Health and Environment, Gyeonggi-do, Korea
| | - D M Kim
- Seoul Metropolitan Government Research Institute of Public Health and Environment, Gyeonggi-do, Korea
| | - S J Jeon
- Seoul Metropolitan Government Research Institute of Public Health and Environment, Gyeonggi-do, Korea
| | - H K Lee
- Seoul Metropolitan Government Research Institute of Public Health and Environment, Gyeonggi-do, Korea
| | - Y H Oh
- Seoul Metropolitan Government Research Institute of Public Health and Environment, Gyeonggi-do, Korea
| | - Y O Hwang
- Seoul Metropolitan Government Research Institute of Public Health and Environment, Gyeonggi-do, Korea
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14
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Mirkhani SA, Iqbal A, Kwon T, Chae A, Kim D, Kim H, Kim SJ, Kim MK, Koo CM. Reduction of Electrochemically Exfoliated Graphene Films for High-Performance Electromagnetic Interference Shielding. ACS Appl Mater Interfaces 2021; 13:15827-15836. [PMID: 33779141 DOI: 10.1021/acsami.0c22920] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Two-dimensional graphene is of great interest for electromagnetic interference (EMI) shielding owing to its inherent electrical conductivity, lightweight, and excellent mechanical flexibility even at minor thicknesses. However, the complex synthesis and quality-control difficulties limit its application. In this study, we demonstrate that electrochemically exfoliated graphene (EEG) with post-reduction treatment is a promising candidate for lightweight EMI shielding materials. A facile electrochemical exfoliation approach produces a high-quality multilayer graphene with a high electrical conductivity of ∼600 S cm-1, owing to its low degree of oxidation. The reduction of EEG by three different methods, including chemical, thermal, and microwave treatments, causes the removal of surface functional groups as well as significant changes in the microstructure of the final films. The reduced graphene films by microwaves, which are driven by the improved electrical conductivity and large volume expansion, exhibit an EMI shielding effectiveness of 108 dB at a thickness of 125 μm, one of the largest EMI shielding values ever reported for graphene at comparable thicknesses.
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Affiliation(s)
- Seyyed Alireza Mirkhani
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea
| | - Aamir Iqbal
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea
- Division of Nano & Information Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea
| | - Taehoon Kwon
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Anam-ro 145, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Ari Chae
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea
| | - Daesin Kim
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Anam-ro 145, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Hyerim Kim
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Anam-ro 145, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Seon Joon Kim
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea
- Division of Nano & Information Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea
| | - Myung-Ki Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Anam-ro 145, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Chong Min Koo
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea
- Division of Nano & Information Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Anam-ro 145, Seongbuk-gu, Seoul 02841, Republic of Korea
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15
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Yoon SH, Yang S, Cho H, Eun S, Koo CM, Kim MK. Point-of-care testing for the detection of SARS-CoV-2: a systematic review and meta-analysis. Eur Rev Med Pharmacol Sci 2021; 25:503-517. [PMID: 33506942 DOI: 10.26355/eurrev_202101_24422] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To evaluate the diagnostic accuracy of the Food and Drug Administration Emergency Use Authorization (FDA-EUA) authorized point-of-care tests (POCTs) for the detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). MATERIALS AND METHODS A systematic literature search was conducted using the PubMed, Embase, and Web of Science databases for articles published till August 10, 2020. We included studies providing information regarding diagnostic test accuracy of FDA-EUA POCTs for SARS-CoV-2 detection. The methodologic quality was assessed using the Quality Assessment of Diagnostic Accuracy Studies-2 tool. The review protocol is registered in the International Prospective Register of Systematic Reviews (protocol number CRD42020202248). RESULTS We included 26 studies describing a total of 3242 samples. The summary sensitivity and specificity were 0.94 [95% confidence interval (CI): 0.88-0.97] and 1.00 (95% CI: 0.99-1.00), respectively. The area under the summary receiver operating characteristic curve was 1.00 (95% CI: 0.99-1.00). A pooled analysis based on the index test revealed a summary sensitivity and specificity of Cepheid Xpert Xpress SARS-CoV-2 [0.99 (95% CI: 0.97-1.00) and 0.99 (95% CI: 0.94-1.00, respectively)] and ID NOW COVID-19 [0.78 (95% CI: 0.74-0.82) and 1.00 (95% CI: 0.98-1.00), respectively]. CONCLUSIONS FDA-EUA POCTs, especially molecular assays, have high sensitivity, specificity, and overall diagnostic accuracy for detecting SARS-CoV-2. If approved, FDA-EUA POCTs can provide a rapid and practical way to identify infected individuals early on and help to limit the strain on the healthcare system. However, more high-quality clinical data are required to support our results.
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Affiliation(s)
- S H Yoon
- Department of Pediatrics, Severance Children's Hospital, Yonsei University College of Medicine, Seoul, South Korea.
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16
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Lee SG, Kim MK, Kim YS. Progress of x-ray imaging crystal spectrometer utilizing double crystal assembly on KSTAR. Rev Sci Instrum 2021; 92:023501. [PMID: 33648144 DOI: 10.1063/5.0041202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 01/28/2021] [Indexed: 06/12/2023]
Abstract
The x-ray imaging crystal spectrometer (XICS) for Korea Superconducting Tokamak Advanced Research (KSTAR) has been upgraded to increase its performance including measurement capabilities and stable operation. A dual crystal assembly for simultaneous measurements of the helium-like and hydrogen-like Ar spectra is successfully installed for improving measurement capabilities. Using a safety viewing port with an illuminator and removing the XICS control system from the harsh KSTAR tokamak hall for a stable operation are newly performed. The experimental results from the improved XICS are investigated.
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Affiliation(s)
- S G Lee
- Korea Institute of Fusion Energy, 169-148 Gwahangno, Yueseong-gu, Daejeon 34133, South Korea
| | - M K Kim
- Korea Institute of Fusion Energy, 169-148 Gwahangno, Yueseong-gu, Daejeon 34133, South Korea
| | - Y S Kim
- Korea Institute of Fusion Energy, 169-148 Gwahangno, Yueseong-gu, Daejeon 34133, South Korea
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17
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Park NR, Kim HN, Jin YH, Kim M, Lee KS, Kim MK. Extreme field confinement in zigzag plasmonic crystals. Nanotechnology 2020; 31:495206. [PMID: 32946428 DOI: 10.1088/1361-6528/abb2c3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We propose extreme field confinement in a zigzag plasmonic crystal that can produce a wide plasmonic bandgap near the visible frequency range. By applying a periodic zigzag structure to a metal-insulator-metal plasmonic waveguide, the lowest three plasmonic crystal bands are flattened, creating a high-quality broadband plasmonic mirror over a wavelength range of 526-909 nm. Utilizing zigzag plasmonic crystals in a three-dimensional tapered metal-insulator-metal plasmonic cavity, extreme field confinement with a modal volume of less than 0.00005 λ 3 can be achieved even at resonances over a wide frequency range. In addition, by selecting the number of zigzag periods in the plasmonic crystal, critical coupling between the cavity and the waveguide can be achieved, thereby maximizing the field intensity with an enhancement factor of 105 or more. We believe that zigzag plasmonic crystals will provide a powerful platform for implementing broadband on-chip plasmonic devices.
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Affiliation(s)
- Nu-Ri Park
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Republic of Korea
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18
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Kim Y, Park BJ, Kim M, Jin YH, Park NR, Kim MK. Light Engineering in Nanometer Space. Adv Mater 2020; 32:e2003051. [PMID: 33043504 DOI: 10.1002/adma.202003051] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 07/12/2020] [Indexed: 06/11/2023]
Abstract
Significant advances have been made in photonic integrated circuit technology, similar to the development of electronic integrated circuits. However, the miniaturization of cavity resonators, which are the essential components of photonic circuits, still requires considerable improvement. Over the past decades, various optical cavities have been utilized to implement next-generation light sources in photonic circuits with low energy, high data traffic, and integrable physical sizes. Nevertheless, it has been difficult to reduce the size of most commercialized cavities beyond the diffraction limit while maintaining high performance. Herein, recent advancements in subwavelength metallic cavities that can improve performance, even with the use of lossy plasmonic modes, are reviewed. The discussion is divided in three parts according to light engineering methods: subwavelength metal-clad cavities engineered using intermediate dielectric cladding; implementation of plasmonic cavities and waveguides using plasmonic crystals; and development of deep-subwavelength plasmonic waveguides and cavities using geometric engineering. A direction for further developments in photonic integrated circuit technology is also discussed, along with its practical application.
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Affiliation(s)
- Yushin Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
- Department of Radiology, Stanford University, Stanford, CA, 94305, USA
| | - Byoung Jun Park
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Moohyuk Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Young-Ho Jin
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Nu-Ri Park
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Myung-Ki Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
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19
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Iqbal A, Shahzad F, Hantanasirisakul K, Kim MK, Kwon J, Hong J, Kim H, Kim D, Gogotsi Y, Koo CM. Anomalous absorption of electromagnetic waves by 2D transition metal carbonitride Ti 3CNT x (MXene). Science 2020; 369:446-450. [PMID: 32703878 DOI: 10.1126/science.aba7977] [Citation(s) in RCA: 286] [Impact Index Per Article: 71.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 06/05/2020] [Indexed: 01/06/2023]
Abstract
Lightweight, ultrathin, and flexible electromagnetic interference (EMI) shielding materials are needed to protect electronic circuits and portable telecommunication devices and to eliminate cross-talk between devices and device components. Here, we show that a two-dimensional (2D) transition metal carbonitride, Ti3CNT x MXene, with a moderate electrical conductivity, provides a higher shielding effectiveness compared with more conductive Ti3C2T x or metal foils of the same thickness. This exceptional shielding performance of Ti3CNT x was achieved by thermal annealing and is attributed to an anomalously high absorption of electromagnetic waves in its layered, metamaterial-like structure. These results provide guidance for designing advanced EMI shielding materials but also highlight the need for exploring fundamental mechanisms behind interaction of electromagnetic waves with 2D materials.
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Affiliation(s)
- Aamir Iqbal
- Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea.,Division of Nano & Information Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea.,Department of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA 19104, USA
| | - Faisal Shahzad
- Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Kanit Hantanasirisakul
- Department of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA 19104, USA
| | - Myung-Ki Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Jisung Kwon
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Junpyo Hong
- Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Hyerim Kim
- Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea.,KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Daesin Kim
- Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea.,KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Yury Gogotsi
- Department of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA 19104, USA.
| | - Chong Min Koo
- Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea. .,Division of Nano & Information Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea.,KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
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20
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Iqbal A, Shahzad F, Hantanasirisakul K, Kim MK, Kwon J, Hong J, Kim H, Kim D, Gogotsi Y, Koo CM. Anomalous absorption of electromagnetic waves by 2D transition metal carbonitride Ti 3CNT x (MXene). Science 2020. [PMID: 32703878 DOI: 10.1002/9783527829828] [Citation(s) in RCA: 4] [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] [Indexed: 05/15/2023]
Abstract
Lightweight, ultrathin, and flexible electromagnetic interference (EMI) shielding materials are needed to protect electronic circuits and portable telecommunication devices and to eliminate cross-talk between devices and device components. Here, we show that a two-dimensional (2D) transition metal carbonitride, Ti3CNT x MXene, with a moderate electrical conductivity, provides a higher shielding effectiveness compared with more conductive Ti3C2T x or metal foils of the same thickness. This exceptional shielding performance of Ti3CNT x was achieved by thermal annealing and is attributed to an anomalously high absorption of electromagnetic waves in its layered, metamaterial-like structure. These results provide guidance for designing advanced EMI shielding materials but also highlight the need for exploring fundamental mechanisms behind interaction of electromagnetic waves with 2D materials.
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Affiliation(s)
- Aamir Iqbal
- Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
- Division of Nano & Information Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea
- Department of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA 19104, USA
| | - Faisal Shahzad
- Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Kanit Hantanasirisakul
- Department of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA 19104, USA
| | - Myung-Ki Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Jisung Kwon
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Junpyo Hong
- Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Hyerim Kim
- Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Daesin Kim
- Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Yury Gogotsi
- Department of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA 19104, USA.
| | - Chong Min Koo
- Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea.
- Division of Nano & Information Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
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21
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Kim HM, Kim MK. Beam steering of a single nanoantenna. Opt Express 2020; 28:16822-16833. [PMID: 32549496 DOI: 10.1364/oe.392999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 05/06/2020] [Indexed: 06/11/2023]
Abstract
Nanoantennas play an important role as mediators to efficiently convert free-space light into localized optical energy and vice versa. However, effective control of the beam direction of a single nanoantenna remains a great challenge. In this paper, we propose an approach to steer the beam direction of a single nanoantenna by adjusting two antenna modes with opposite phase symmetry. Our theoretical study confirmed that the combination of even- and odd-symmetric modes with a phase difference of π/2 enables effective beam steering of a single nanoantenna whose steering angle is controlled by adjusting the amplitude ratio of the two antenna modes. To implement our theory in real devices, we introduced asymmetric trapezoidal nano-slot antennas with different side air-gaps of 10 and 50 nm. The trapezoidal nanoantennas can simultaneously excite the dipole and quadrupole modes in a single nanoantenna and enables effective beam steering with an angle of greater than 35° near the resonance of the quadrupole mode. In addition, the steering angle can also be controlled by adjusting the degree of asymmetry of the trapezoidal slot structure. We believe that our beam steering method for a single nanoantenna will find many potential applications in fields such as imaging, sensing, optical communication, and quantum optics.
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Yun T, Kim H, Iqbal A, Cho YS, Lee GS, Kim MK, Kim SJ, Kim D, Gogotsi Y, Kim SO, Koo CM. Electromagnetic Shielding of Monolayer MXene Assemblies. Adv Mater 2020; 32:e1906769. [PMID: 31971302 DOI: 10.1002/adma.201906769] [Citation(s) in RCA: 177] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 11/21/2019] [Indexed: 05/03/2023]
Abstract
Miniaturization of electronics demands electromagnetic interference (EMI) shielding of nanoscale dimension. The authors report a systematic exploration of EMI shielding behavior of 2D Ti3 C2 Tx MXene assembled films over a broad range of film thicknesses, monolayer by monolayer. Theoretical models are used to explain the shielding mechanism below skin depth, where multiple reflection becomes significant, along with the surface reflection and bulk absorption of electromagnetic radiation. While a monolayer assembled film offers ≈20% shielding of electromagnetic waves, a 24-layer film of ≈55 nm thickness demonstrates 99% shielding (20 dB), revealing an extraordinarily large absolute shielding effectiveness (3.89 × 106 dB cm2 g-1 ). This remarkable performance of nanometer-thin solution processable MXene proposes a paradigm shift in shielding of lightweight, portable, and compact next-generation electronic devices.
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Affiliation(s)
- Taeyeong Yun
- National Creative Research Initiative Centre for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST Institute for Nanocentury, Daejeon, 34141, Korea
| | - Hyerim Kim
- Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul, 02792, Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Korea
| | - Aamir Iqbal
- Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul, 02792, Korea
- Division of Nano and Information Technology, KIST School, University of Science and Technology, Daejeon, 34113, Korea
| | - Yong Soo Cho
- Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul, 02792, Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Korea
| | - Gang San Lee
- National Creative Research Initiative Centre for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST Institute for Nanocentury, Daejeon, 34141, Korea
| | - Myung-Ki Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Korea
| | - Seon Joon Kim
- Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul, 02792, Korea
- Department of Materials Science and Engineering, and A. J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA, 19104, USA
| | - Daesin Kim
- Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul, 02792, Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Korea
| | - Yury Gogotsi
- Department of Materials Science and Engineering, and A. J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA, 19104, USA
| | - Sang Ouk Kim
- National Creative Research Initiative Centre for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST Institute for Nanocentury, Daejeon, 34141, Korea
| | - Chong Min Koo
- Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul, 02792, Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Korea
- Division of Nano and Information Technology, KIST School, University of Science and Technology, Daejeon, 34113, Korea
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Moon I, Lee SP, Kim MK, Park JB, Kim HK, Kim YJ, Sohn DW. P1274 Early surgery versus watchful waiting in patients with moderate aortic stenosis and left ventricular systolic dysfunction. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.724] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Aortic stenosis (AS) induces significant pressure overload to the left ventricle (LV) and its burden may increase if there is concomitant LV systolic dysfunction. Severe AS with LV systolic dysfunction is a class I indication for aortic valve replacement (AVR) irrespective of symptoms, however, this recommendation is not well established in those with moderate AS and LV systolic dysfunction. In this study, we sought to investigate the clinical impact of surgical AVR among patients with moderate AS and LV systolic dysfunction.
Methods
From 2001 to 2017, we retrospectively but consecutively identified patients with moderate AS and LV systolic dysfunction from a single tertiary hospital. Moderate AS was defined as aortic valve area between 1.0 and 1.5cm2 and LV systolic dysfunction as LV ejection fraction less than 50%. The primary outcome was all-cause death and we additionally analyzed cardiac death as a secondary endpoint. The outcomes were compared between those who underwent early surgical AVR at the stage of moderate AS versus those who were followed without AVR at the outpatient clinic.
Results
Among a total of 257 patients with moderate AS and concomitant LV systolic dysfunction (70.0 ± 11.3 years, 63.4% of male), 34 patients received early AVR. Patients in the AVR group was younger than the observation group (64.2 ± 8.1 vs. 70.9 ± 11.5, respectively), and had a lower prevalence of hypertension and chronic kidney disease. During a mean of 3-year follow up, 112 patients (47.5%) died and the overall death rate was 15.367 per 100 person-year (PY). The AVR group showed a significantly lower rate of all-cause death than the observation group (5.241PY vs. 18.160PY, p-value = 0.002). After multivariable Cox proportional hazard regression adjusting for age, sex, comorbidities and laboratory data, early AVR at the stage of moderate AS significantly reduced the risk of all-cause death (hazard ratio [HR] 0.340, 95% confidence interval [CI] 0.117 - 0.985, p-value = 0.047). However, there was no risk reduction of cardiac death (HR 0.578 95% CI 0.150 - 2.231, p-value = 0.426).
Conclusions
In patients with moderate AS and LV systolic dysfunction, AVR reduces the risk of all-cause death. A prospective design study is warranted to confirm our findings in the near future.
Abstract P1274 Figure. Kaplan-Meier curves for deaths
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Affiliation(s)
- I Moon
- Seoul National University Hospital, Department of Internal Medicine, Seoul, Korea (Republic of)
| | - S P Lee
- Seoul National University Hospital, Department of Internal Medicine, Seoul, Korea (Republic of)
| | - M K Kim
- Seoul National University Hospital, Department of Internal Medicine, Seoul, Korea (Republic of)
| | - J B Park
- Seoul National University Hospital, Department of Internal Medicine, Seoul, Korea (Republic of)
| | - H K Kim
- Seoul National University Hospital, Department of Internal Medicine, Seoul, Korea (Republic of)
| | - Y J Kim
- Seoul National University Hospital, Department of Internal Medicine, Seoul, Korea (Republic of)
| | - D W Sohn
- Seoul National University Hospital, Department of Internal Medicine, Seoul, Korea (Republic of)
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Park BJ, Jin YH, Park NR, Kim JT, Kim MK. Nanolayer-embedded pseudo-photonic crystals. Nanotechnology 2019; 30:47LT01. [PMID: 31434058 DOI: 10.1088/1361-6528/ab3d74] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In recent years, novel high-performance nanophotonic devices have been realized by applying ultrathin two-dimensional nanolayer materials to nanophotonics. In this paper, we propose nanolayer-embedded compact pseudo-photonic crystals (PPCs) that enable strong interaction between ultrathin nanolayers and photonic crystal modes. In typical two-dimensional slab photonic crystals, the transverse-magnetic (TM) photonic crystal bandgap is not well formed, making it difficult to operate the TM photonic crystal waveguide modes. However, by utilizing the low-frequency TM PPC bands, a long propagation TM waveguide mode, a slow TM waveguide mode, and a TM photonic bandgap are all readily available. In particular, the insertion of a nanometer-thick low-refractive-index layer in the vertical center of TM PPC waveguide can localize the electric fields tightly in nanometer space, causing strong field interaction with the inserted nanolayer material. Using the TM slow light near PPC band edges, field interaction with the nanolayer is significantly enhanced. We can also realize nanolayer-embedded high-quality-factor (Q-factor > 104) PPC cavities using the TM PPC bandgap. We believe that the proposed TM PPCs will play an important role in the strong interaction of ultrathin nanolayer materials with photonic crystal modes.
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Affiliation(s)
- Byoung Jun Park
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Republic of Korea
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Sambyal P, Iqbal A, Hong J, Kim H, Kim MK, Hong SM, Han M, Gogotsi Y, Koo CM. Ultralight and Mechanically Robust Ti 3C 2T x Hybrid Aerogel Reinforced by Carbon Nanotubes for Electromagnetic Interference Shielding. ACS Appl Mater Interfaces 2019; 11:38046-38054. [PMID: 31509378 DOI: 10.1021/acsami.9b12550] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Lightweight materials with high electrical conductivity and robust mechanical properties are highly desirable for electromagnetic interference (EMI) shielding in modern portable and highly integrated electronics. Herein, a three-dimensional (3D) porous Ti3C2Tx/carbon nanotube (CNT) hybrid aerogel was fabricated via a bidirectional freezing method for lightweight EMI shielding application. The synergism of the lamellar and porous structure of the MXene/CNT hybrid aerogels contributed extensively to their excellent electrical conductivity (9.43 S cm-1) and superior electromagnetic shielding effectiveness (EMI SE) value of 103.9 dB at 3 mm thickness at the X-band frequency, the latter of which is the best value reported for synthetic porous nanomaterials. The CNT reinforcement in the MXene/CNT hybrid aerogels enhanced the mechanical robustness and increased the compressional modulus by 9661% relative to that of the pristine MXene aerogel. The hybrid aerogel with high electrical conductivity, good mechanical strength, and superior EMI shielding performance is a promising material for inhibiting EMI pollution.
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Affiliation(s)
- Pradeep Sambyal
- Materials Architecturing Research Center , Korea Institute of Science and Technology , Hwarangno 14-gil 5 , Seongbuk Gu, Seoul 02792 , Republic of Korea
| | - Aamir Iqbal
- Materials Architecturing Research Center , Korea Institute of Science and Technology , Hwarangno 14-gil 5 , Seongbuk Gu, Seoul 02792 , Republic of Korea
- Nanomaterials Science and Engineering , University of Science and Technology , 217 Gajungro, 176 Gajung-dong , Yuseong Gu, Daejeon 34113 , Republic of Korea
| | - Junpyo Hong
- Materials Architecturing Research Center , Korea Institute of Science and Technology , Hwarangno 14-gil 5 , Seongbuk Gu, Seoul 02792 , Republic of Korea
| | - Hyerim Kim
- Materials Architecturing Research Center , Korea Institute of Science and Technology , Hwarangno 14-gil 5 , Seongbuk Gu, Seoul 02792 , Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology , Korea University , Anam-ro 145 , Seongbuk-gu, Seoul 02841 , Republic of Korea
| | - Myung-Ki Kim
- KU-KIST Graduate School of Converging Science and Technology , Korea University , Anam-ro 145 , Seongbuk-gu, Seoul 02841 , Republic of Korea
| | - Soon Man Hong
- Materials Architecturing Research Center , Korea Institute of Science and Technology , Hwarangno 14-gil 5 , Seongbuk Gu, Seoul 02792 , Republic of Korea
| | - Meikang Han
- A. J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering , Drexel University , Philadelphia , Pennsylvania 19104 , United States
| | - Yury Gogotsi
- A. J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering , Drexel University , Philadelphia , Pennsylvania 19104 , United States
| | - Chong Min Koo
- Materials Architecturing Research Center , Korea Institute of Science and Technology , Hwarangno 14-gil 5 , Seongbuk Gu, Seoul 02792 , Republic of Korea
- Nanomaterials Science and Engineering , University of Science and Technology , 217 Gajungro, 176 Gajung-dong , Yuseong Gu, Daejeon 34113 , Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology , Korea University , Anam-ro 145 , Seongbuk-gu, Seoul 02841 , Republic of Korea
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Seo YG, Sung J, Shin MS, Park YJ, Min KB, Kang GM, Lee JM, Kim MK. The effect of cardiac rehabilitation at 4 weeks postoperatively on quality of life in patients treated with totally thoracoscopic ablation. J Exerc Rehabil 2019; 15:610-615. [PMID: 31523685 PMCID: PMC6732541 DOI: 10.12965/jer.1938340.170] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 07/03/2019] [Indexed: 11/22/2022] Open
Abstract
There is a lack of evidence on the effect of exercise-based cardiac rehabilitation (EBCR) in patients treated with total thoracoscopic ablation (TTA) for atrial fibrillation (AF). Our study investigated the efficacy and safety of postoperative exercise intervention in patients recovering from TTA. Twenty-four patients participated in the study, and were divided into the two groups, exercise group (EG) (n=12) and control group (n= 12). Patients in EG performed the exercise intervention including the aerobic and resistance exercise program twice a week for 8 weeks, which was used as a hospital-based cardiac rehabilitation for the out-patient. A cardiopulmonary exercise test was administered to evaluate aerobic exercise capacity, and qualitative aspect of patient’s life was assessed using the Short Form 36 questionnaires to compare pre and postoperative wellness of patient’s life. Although there was an increase of VO2peak (peak oxygen uptake) after exercise intervention, no significant improvement was found (P=0.055). Two of 4 physical health scores (role-physical, P=0.013 and general health, P=0.05) and three of four mental health scores (vitality, P=0.027, social function, P=0.016, and mental health, P=0.003) were significantly improved after 8 weeks of EBCR. Each summarized scale in the physical (P=0.022) and mental (P= 0.004) survey section was also significantly improved in postoperative assessment compared to the preoperative one. In this context, we concluded that EBCR initiated at the time point of 4th week after TTA operation can guarantee the secure postoperative physical activity, and the 8 weeks of EBCR can effectively improve the quality of life in AF Patients.
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Affiliation(s)
- Yong-Gon Seo
- Division of Sports Medicine, Department of Orthopedic Surgery, Samsung Medical Center, Seoul, Korea
| | - Jidong Sung
- Division of Cardiology, Department of Internal Medicine, Samsung Medical Center, Seoul, Korea
| | - Mal-Soon Shin
- School of Global Sport Studies, Korea University, Sejong, Korea
| | - Yun-Jin Park
- School of Global Sport Studies, Korea University, Sejong, Korea
| | - Kyoung-Bin Min
- School of Global Sport Studies, Korea University, Sejong, Korea
| | - Gyu-Min Kang
- School of Global Sport Studies, Korea University, Sejong, Korea
| | - Jong-Min Lee
- Division of Creative Convergence, Department of Chirosports, Kijeon College, Jeonju, Korea
| | - Myung-Ki Kim
- School of Global Sport Studies, Korea University, Sejong, Korea
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Kwak DJ, Kim KT, Kang GM, Park YJ, Lee HL, Kim MK. Effect of 8-week Nordic walking training on nondominant hand grip and shoulder strength in middle-aged women. J Exerc Rehabil 2019; 15:414-418. [PMID: 31316934 PMCID: PMC6614777 DOI: 10.12965/jer.1938226.113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 05/29/2019] [Indexed: 11/22/2022] Open
Abstract
Nordic walking (NW) is a full body training that can be performed with special pole, and has been recognized as an effective out-door activity which can improve the strength of upper extremity. Most previous studies mainly analyzed the effect of NW on the strength of dominant (DN) hand-grip strength, however, a clear scientific examination is needed whether nondominant (NDN) extremity can also be ameliorated by the NW. Therefore, the aim of our study is to investigate the effectiveness of 8 weeks NW training on the NDN handgrip and shoulder strength in healthy middle-aged women. 29 subjects were randomly divided into three groups: Nordic walking group (NWG, n=10), brisk walking group (BWG, n=11), and control group (CG, n=8). Handgrip and shoulder strength were measured by the hand dynamometer and isokinetic machine. NW training was performed 3 times a week, and had 10-min warm-up, 40-min main program consisted of ALFA (Attention, Long arms, Flat poles, Adaptes) technique and Turbo walking, and 10-min cool-down. In handgrip strength of DN hand and the shoulder flexor strength in the both sides, NWG and BWG showed significantly higher value compared to CG. In the NDN hand, NWG also showed significantly higher strength compared to CG, however, there was no significant difference in the handgrip strength/weight among groups. In NDN shoulder extension, significantly higher improvement was found in NWG and BWG compared to that of CG. In conclusion, our study showed that NW can improve the strength of upper extremity in subjects, and can be better approach to improve the NDN handgrip strength than brisk walking method could.
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Affiliation(s)
| | | | | | | | | | - Myung-Ki Kim
- Corresponding author: Myung-Ki Kim, https://orcid.org/0000-0002-5821-9203, School of Global Sport Studies, Korea University, Sejong Campus, 2511 Sejong-ro, Jochiwon-eup, Sejong 30019, Korea, E-mail:
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Kim MK, Shin HC. Abstract P4-14-13: Tamoxifen induced ovarian hyperstimulation during hormonal therapy for breast cancer. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p4-14-13] [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
Introduction
Adjuvant endocrine therapy is an integral compo-nent of care for endocrine-dependent breast cancer.
To date, international consensus statements recommend tamoxifen (20 mg/day) for five years as the standard adjuvant endocrine therapy for premenopausal women. Tamoxifen is a potent inducer of ovarian function and consequent hyper-estrogenism in premenopausal women. However, the incidence rate and risk factors associated this phenomenone were not clarified.
Methods
Among consecutive patients who were operated under diagnosis of breast cancer from March 2012 to December 2016 in Chung-Ang university hospital, patients who received post-operative tamoxifen therapy for endocrine-dependent breast cancer (stage 0-III) at age under 60 were selected and retrospectively analysed. Serial data on serum estradiol and follicular stimulating hormone(FSH) were collected. When the serum concentration of estradiol was higher than 400 pg/mL, which exceeds the normal estradiol production by a single preovulatory follicle, we classified them as tamoxifen induced ovarian hyperstimulation group. Clinicopathologic factors were analyzed between ovarian hyperstimulation group and non-hyperstimulation group by x2 and student t-test.
Results
Among 205 patients, 19 patients(9.3%) showed high values of serum estradiol during tamoxifen therapy. They showed 44 times of high estradiol level during follow up period. The serum concentrations of estradiol and FSH were 1047.97638.8pg/mL and 11.57.3 mIu/mL, respectively. The mean duration from the start of the single administration of tamoxifen to the initial detection of a high concentration of estradiol was 666.4+433.1 days.
Univariate and multivariate analysis between ovarian hyperstimulation and non-hyperstimulation groups showed younger age(<40years) and only endocrine therapy without chemotherapy were related to higher prevalence of ovarian hyperstimulation significantly. (p <0.001, =0.031 each) Pathologic stages and progesterone receptor expressions on breast tumor were not related to manifestation of ovarian hyperstimulation.
Conclusions
The Incidence rate and occurrence time of ovarian hyperstimulation associated with adjuvant tamoxifen treatment in breast cancer patients under age 60 were 9.3% and around 2-year after treatment with tamoxifen. Young age under 40 years old and endocrine treatment without chemotherapy were risk factors predicting occurrence of ovarian hyperstimulation during tamoxifen treatment. It should be noted that tamoxifen is a potent inducer of ovarian function and close monitoring of the endocrine parameters during treatment with tamoxifen would be essential.
Citation Format: Kim MK, Shin H-c. Tamoxifen induced ovarian hyperstimulation during hormonal therapy for breast cancer [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P4-14-13.
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Affiliation(s)
- MK Kim
- Chung-Ang University Hospital, Seoul, Republic of Korea
| | - H-c Shin
- Chung-Ang University Hospital, Seoul, Republic of Korea
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Abstract
PURPOSE Several meta-analyses of randomized controlled trials (RCTs) reported no association between the use of statins and the risk of cancer. However, they included open-label RCTs, which did not use placebo as a control group. This study aimed to evaluate the effect of statins on cancer risk using a meta-analysis of randomized, double-blind, placebo-controlled trials (RDBPCTs). METHODS We searched PubMed, EMBASE, and the Cochrane Library in March 2016. Two individual authors reviewed and selected RDBPCTs based on selection criteria. RESULTS Out of 676 retrieved articles, a total of 21 RDBPCTs with 65,196 participants (32,618 in the statin group and 32,578 in the placebo group) were included in the meta-analysis. Overall, we found that there was no significant association between the use of statins and the risk of cancer (relative risk 0.97, 95% confidence interval 0.92-1.02, I2 = 0.0%) in a fixed-effect meta-analysis. In addition, in the subgroup meta-analyses, no beneficial effect of statins was observed when analyzed by statin type, country, follow-up period, methodological quality, underlying diseases/population, and type of cancer. CONCLUSIONS The current meta-analysis of RDBPCTs found that there was no association between the use of statins and the risk of cancer.
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Affiliation(s)
- M K Kim
- Department of Cancer Control and Population Health; Department of Cancer Biomedical Science, National Cancer Center Graduate School of Cancer Science and Policy, Goyang, Republic of Korea
| | - S K Myung
- Department of Cancer Biomedical Science, National Cancer Center Graduate School of Cancer Science and Policy; Cancer Epidemiology Branch, Division of Cancer Epidemiology and Prevention, Research Institute; Department of Family Medicine and Center for Cancer Prevention and Detection, National Cancer Center, Goyang, Republic of Korea
| | - B T Tran
- Department of Cancer Control and Population Health, National Cancer Center Graduate School of Cancer Science and Policy, Goyang, Republic of Korea
| | - B Park
- Department of Cancer Control and Population Health, National Cancer Center Graduate School of Cancer Science and Policy, Goyang, Republic of Korea
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Yoon SJ, Lee J, Han S, Kim CK, Ahn CW, Kim MK, Lee YH. Non-fluorescent nanoscopic monitoring of a single trapped nanoparticle via nonlinear point sources. Nat Commun 2018; 9:2218. [PMID: 29880791 PMCID: PMC5992221 DOI: 10.1038/s41467-018-04689-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 05/16/2018] [Indexed: 11/08/2022] Open
Abstract
Detection of single nanoparticles or molecules has often relied on fluorescent schemes. However, fluorescence detection approaches limit the range of investigable nanoparticles or molecules. Here, we propose and demonstrate a non-fluorescent nanoscopic trapping and monitoring platform that can trap a single sub-5-nm particle and monitor it with a pair of floating nonlinear point sources. The resonant photon funnelling into an extremely small volume of ~5 × 5 × 7 nm3 through the three-dimensionally tapered 5-nm-gap plasmonic nanoantenna enables the trapping of a 4-nm CdSe/ZnS quantum dot with low intensity of a 1560-nm continuous-wave laser, and the pumping of 1560-nm femtosecond laser pulses creates strong background-free second-harmonic point illumination sources at the two vertices of the nanoantenna. Under the stable trapping conditions, intermittent but intense nonlinear optical spikes are observed on top of the second-harmonic signal plateau, which is identified as the 3.0-Hz Kramers hopping of the quantum dot trapped in the 5-nm gap.
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Affiliation(s)
- Seung Ju Yoon
- Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea
| | - Jungmin Lee
- Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea
| | - Sangyoon Han
- Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea
| | - Chang-Kyu Kim
- Department of Nano-Optical Engineering, Korea Polytechnic University, Siheung, 15073, South Korea
| | - Chi Won Ahn
- KAIST, National NanoFab Center (NNFC), Daejeon, 341401, South Korea
| | - Myung-Ki Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, South Korea.
| | - Yong-Hee Lee
- Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea.
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Kim HM, Jang H, Pramudita P, Kim MK, Lee YH. Monolithic integration of self-aligned nanoisland laser with shifted-air-hole waveguide. Opt Express 2018; 26:12569-12578. [PMID: 29801295 DOI: 10.1364/oe.26.012569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 04/22/2018] [Indexed: 06/08/2023]
Abstract
We report a novel scheme for monolithic integration of a nanoisland laser with a shifted-air-hole waveguide by employing selective etching techniques. An active L3 laser cavity and passive shifted-air-hole waveguide are simultaneously formed through a single fabrication step. In the shifted-air-hole waveguide, the air-hole position is adjusted to be compatible with selective etching. The spectral overlap between the L3 laser resonance and guided mode is achieved by introducing small air holes at the nodes of the shifted-air-hole waveguide. Experiments show that >60% of the light is coupled from the nanoisland laser to the end of the 12-μm-long waveguide.
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Kim MK, Shin HK, Shin HC. Abstract P3-01-04: The axillary lymph node to primary breast tumor SUV ratio on FDG-PET/CT in FDG avid primary breast cancers: Could predict the necessity for axillary lymph node dissection. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p3-01-04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Emerging evidence has indicated that breast cancer patients with a low axillary burden do not benefit from sentinel lymph node biopsy. Thus, to specifically identify more than 3 nodes-positive patients who can proceed directly to axillary lymph node(ALN) dissection, and avoid unnecessary surgical procedures, accurate preoperative detection by radiologic assessment would be anticipated. In this study, we evaluated the usefulness of ALN to primary breast tumor SUV ratio (determined by 18F-FDG PET/CT) and MRI for predicting the need for ALN dissection in breast cancer surgery.
Method: Three hundred sixteen consecutive female patients with primary breast cancer were enrolled in this retrospective study between January 2012 and December 2016. All patients underwent preoperative 18F-FDG PET/CT, MRI, and surgical resection without neoadjuvant chemotherapy.The ALN to primary breast tumor SUV ratios(LN/T ratios) were calculated, and optimal cutoff values were determined by receiver operating characteristic curve analysis for predicting the presence of ≥3 ALN metastasis. The diagnostic performances of 18F-FDG PET/CTLN/T ratio and MRI for the prediction of ≥3 ALN metastasis were determined by sensitivity, specificity, and diagnostic odds ratio(DOR). Subgroup analysis of those for FDG avid cancers were performed.
Result: Of the 316 patients, 36(11.4%) showed involvement of ≥3 ALNs, and 101(32%) had one or more metastatic lymph nodes. The mean SUV of the primary tumor in the 316 patients was 3.9, ranging from 0 to 26.6, while the mean SUV of the ALN was 0.81, ranging from 0 to 21.9. Axillary 18F-FDG uptake was positive in 75(23.7%) patients and optimal criteria of LN/T ratio for detecting the needs for ALN dissection was 0.3 determined by ROC analysis.MRI showed findings of suspicious ALN involvement in 147(46.6%) patients. The sensitivity and specificity of MRI were 0.89 and 0.56, while those of PET/CTLN/T ratio were 0.69 and 0.87. In the receiver operating characteristic(ROC) analysis, the area under the curve(AUC) for MRI and PET/CTLN/T ratio was 0.756 (0.682-0.829, 95% confidence interval), and 0.817(0.733-0.900, 95% confidence interval). Further analysis of the DOR for MRI showed a value of 10.37 and for PET/CTLN/T ratio the DOR was 9.7. But, in a subgroup of patients with FDG-avid primary tumor(FDG above 3.9, n=108), the area under the curve was improved to 0.896 (0.817-0.975, 95% confidence interval) for PET/CTLN/T ratio, while those of MRI was worsened. (0.681, 0.569- 0.793., 95% CI) DOR value of PET/CTLN/T ratio for FDG avid cancers was 25.68 and their sensitivity and specificity were 0.83 and 0.84 each.
Conclusion: In FDG avid primary breast cancer, PET/CTLN/T ratio could predict need for ALN dissection with higher accuracy than MRI. PET/CT has high potential for being used as a non-invasive imaging diagnostic technique identifying ≥3 ALNs metastases.
Citation Format: Kim MK, Shin HK, Shin H-C. The axillary lymph node to primary breast tumor SUV ratio on FDG-PET/CT in FDG avid primary breast cancers: Could predict the necessity for axillary lymph node dissection [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P3-01-04.
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Affiliation(s)
- MK Kim
- Chung-Ang University Hospital, Seoul, Korea
| | - HK Shin
- Chung-Ang University Hospital, Seoul, Korea
| | - H-C Shin
- Chung-Ang University Hospital, Seoul, Korea
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Son S, Hwang EC, Jung SI, Kwon DD, Choi SH, Kwon TG, Noh JH, Kim MK, Seo IY, Kim CS, Kang SG, Cheon J, Ha HK, Jeong CW, Ku JH, Kwak C, Kim HH. Prognostic value of preoperative systemic inflammation markers in localized upper tract urothelial cell carcinoma: a large, multicenter cohort analysis. Minerva Urol Nephrol 2018; 70:300-309. [PMID: 29381018 DOI: 10.23736/s0393-2249.18.02914-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND The aim of this study was to investigate the prognostic value of preoperative systemic inflammation markers in upper tract urothelial carcinoma (UTUC). METHODS A total of 1137 patients who underwent radical nephroureterectomy with bladder cuff excision at 9 institutions from 2004 to 2015, were retrospectively reviewed. The Glasgow Prognostic Score (GPS), modified GPS (mGPS), neutrophil-to-lymphocyte ratio (NLR), and platelet-to-lymphocyte ratio (PLR) for each patient were calculated. Univariable and multivariable analysis was performed using the Cox proportional hazards regression model. Cut-off values for NLR and PLR were calculated using a receiver operating characteristic curve. RESULTS The median follow-up period was 39.1 (interquartile range: 18.3-63.8) months. Univariable analysis revealed that GPS, mGPS, PLR, and NLR (all, P=0.001) were significantly associated with both recurrence-free survival (RFS) and cancer-specific survival (CSS). Multivariable analysis revealed that GPS (P=0.001), PLR (hazards ratio [HR] =1.32; 95% CI: 1.08-1.62, P=0.007 and HR =1.87; 95% CI: 1.21-2.92, P=0.005), NLR (HR =1.38; 95% CI: 1.12-1.69, P=0.003 and HR =1.70; 95% CI: 1.10-2.62, P=0.017) were significantly associated with RFS and CSS. CONCLUSIONS Our results suggest that preoperative systemic inflammation markers such as GPS, PLR, and NLR are independent prognostic factors in patients with UTUC after surgery.
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Affiliation(s)
- Sumin Son
- Department of Urology, Chonnam National University Medical School, Gwangju, South Korea
| | - Eu-Chang Hwang
- Department of Urology, Chonnam National University Medical School, Gwangju, South Korea -
| | - Seung-Il Jung
- Department of Urology, Chonnam National University Medical School, Gwangju, South Korea
| | - Dong-Deuk Kwon
- Department of Urology, Chonnam National University Medical School, Gwangju, South Korea
| | - Seock-Hwan Choi
- Department of Urology, Kyungpook National University School of Medicine, Daegu, South Korea
| | - Tae-Gyun Kwon
- Department of Urology, Kyungpook National University School of Medicine, Daegu, South Korea
| | - Joon-Hwa Noh
- Department of Urology, Kwangju Christian Hospital, Gwangju, South Korea
| | - Myung-Ki Kim
- Department of Urology, Chonbuk National University Medical School, Jeonju, South Korea
| | - Ill-Young Seo
- Department of Urology, Institute of Wonkwang Medical Science, Wonkwang University School of Medicine, Iksan, South Korea
| | - Chul-Sung Kim
- Department of Urology, Chosun University School of Medicine, Gwangju, South Korea
| | - Sung-Gu Kang
- Department of Urology, Korea University College of Medicine, Seoul, South Korea
| | - Jun Cheon
- Department of Urology, Korea University College of Medicine, Seoul, South Korea
| | - Hong-Koo Ha
- Department of Urology, Pusan National University School of Medicine, Busan, South Korea
| | - Chang-Wook Jeong
- Department of Urology, Seoul National University College of Medicine, Seoul, South Korea
| | - Ja-Hyeon Ku
- Department of Urology, Seoul National University College of Medicine, Seoul, South Korea
| | - Cheol Kwak
- Department of Urology, Seoul National University College of Medicine, Seoul, South Korea
| | - Hyeon-Hoe Kim
- Department of Urology, Seoul National University College of Medicine, Seoul, South Korea
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Oh JM, Woo HW, Kim MK, Lee YH, Shin DH, Shin MH, Choi BY. Dietary total, animal, vegetable calcium and type 2 diabetes incidence among Korean adults: The Korean Multi-Rural Communities Cohort (MRCohort). Nutr Metab Cardiovasc Dis 2017; 27:1152-1164. [PMID: 29167059 DOI: 10.1016/j.numecd.2017.10.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 08/26/2017] [Accepted: 10/05/2017] [Indexed: 02/06/2023]
Abstract
BACKGROUND AND AIMS Although a possible mechanism for developing type 2 diabetes in relation to calcium intake has been suggested, there is currently little epidemiological evidence on the association between dietary calcium and type 2 diabetes (T2D). This study aimed to evaluate the prospective association between dietary calcium and T2D incidence among adults 40 years of age or over, from the Multi-rural Communities Cohort (MRCohort), South Korea. METHODS AND RESULTS In total, 8313 participants (3033 men and 5280 women) who did not have diabetes at baseline were recruited between 2005 and 2013. The incidence rate ratio (IRR) was estimated using a modified Poisson regression model with a robust error estimator. During follow-up (31,570 person-years), 322 T2D cases were newly diagnosed. Dietary calcium (total and vegetable calcium) were inversely associated with the risk of T2D incidence among women (IRR = 0.61, 95% CI = 0.43-0.86, P for trend = 0.007 in third tertile of baseline total calcium intake comparing to the first tertile; IRR = 0.57, 95% CI = 0.39-0.84, P for trend = 0.006 for baseline vegetable calcium intake), not for men. The tendency of those inverse associations remained in both the normal fasting blood glucose group and the impaired fasting blood glucose group and were independent of obesity, smoking, and magnesium intake. CONCLUSIONS Total and vegetable calcium may be inversely associated with T2D incidence among women, regardless of impaired fasting blood glucose group or normal group. The associations may be potentially dose-responsive. Moderate dietary calcium may be related to lower risk of T2D incidence comparing to low intake group among women.
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Affiliation(s)
- J M Oh
- Department of Preventive Medicine, College of Medicine, Hanyang University, Seoul, South Korea; Institute for Health and Society, Hanyang University, Seoul, South Korea
| | - H W Woo
- Department of Preventive Medicine, College of Medicine, Hanyang University, Seoul, South Korea; Institute for Health and Society, Hanyang University, Seoul, South Korea
| | - M K Kim
- Department of Preventive Medicine, College of Medicine, Hanyang University, Seoul, South Korea; Institute for Health and Society, Hanyang University, Seoul, South Korea.
| | - Y-H Lee
- Department of Preventive Medicine, Institute of Wonkwang Medical Science, Wonkwang University College of Medicine, Iksan, South Korea
| | - D H Shin
- Department of Occupational and Environmental Medicine, Keimyung University Dongsan Medical Center, Daegu, South Korea
| | - M-H Shin
- Department of Preventive Medicine, Chonnam National University Medical School, Gwangju, South Korea
| | - B Y Choi
- Department of Preventive Medicine, College of Medicine, Hanyang University, Seoul, South Korea; Institute for Health and Society, Hanyang University, Seoul, South Korea
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Moon JY, Kim MK, Choi YJ, Lee N. Giant Anisotropic Magnetocaloric Effect in Double-perovskite Gd 2CoMnO 6 Single Crystals. Sci Rep 2017; 7:16099. [PMID: 29170464 PMCID: PMC5700970 DOI: 10.1038/s41598-017-16416-z] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 11/13/2017] [Indexed: 11/24/2022] Open
Abstract
The magnetocaloric effect (MCE) is described by the change in temperature of a material by magnetic field variation and is a crucial subject in magnetism; it is motivated by the desire to enhance energy-efficient magnetic refrigeration for clean technology. Despite the recent discovery of the giant cryogenic MCE in double perovskites, the role of magnetic anisotropy has not yet been clearly discussed, because of the averaging effect of polycrystalline samples. Here, we investigated the anisotropic MCE in the single-crystal double perovskite Gd2CoMnO6. In addition to the ferromagnetic order of the Co2+ and Mn4+ moments, the large Gd3+ moments align below T Gd = 21 K, exhibiting an isotropic nature. Because of the intricate temperature development of magnetically hysteretic behaviour and metamagnetism, the change in magnetic entropy along the c-axis appears to be relatively small. On the contrary, the smaller but almost reversible magnetization perpendicular to the c-axis leads to a large MCE with a maximum entropy change of 25.4 J/kg·K. The anisotropic MCE generates a giant rotational MCE, estimated as 16.6 J/kg·K. Our results demonstrate the importance of magnetic anisotropy for understanding the MCE and reveal essential clues for exploring suitable magnetic refrigerant compounds aiming at magnetic functional applications.
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Affiliation(s)
- J Y Moon
- Department of Physics and IPAP, Yonsei University, Seoul, 120-749, Korea
| | - M K Kim
- Department of Physics and IPAP, Yonsei University, Seoul, 120-749, Korea
| | - Y J Choi
- Department of Physics and IPAP, Yonsei University, Seoul, 120-749, Korea.
| | - N Lee
- Department of Physics and IPAP, Yonsei University, Seoul, 120-749, Korea.
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Jung S, Kim MK, Choi BY. The long-term relationship between dietary pantothenic acid (vitamin B 5) intake and C-reactive protein concentration in adults aged 40 years and older. Nutr Metab Cardiovasc Dis 2017; 27:806-816. [PMID: 28739188 DOI: 10.1016/j.numecd.2017.05.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 04/28/2017] [Accepted: 05/24/2017] [Indexed: 01/20/2023]
Abstract
BACKGROUND AND AIMS Low-grade inflammation, represented by minor C-reactive protein (CRP) elevation, has a critical role in the early stages of atherosclerosis, and pantothenic acid (PA) may have an antioxidant effect in inflammatory process. However, the long-term relationship between PA intake and CRP has not yet been studied. The objective of the present study was to evaluate the long-term relationship of PA intake to CRP concentration in healthy adults aged 40 years or older living in a rural area of South Korea. METHODS AND RESULTS A total of 908 subjects (349 men, 559 women) with repeated data on dietary PA intake and CRP concentration were included in the final analysis. To represent the long-term effect of PA intake, both PA intake at the baseline and average PA intake were used as the exposure, and CRP concentration at the third visit and its change from the baseline to the third visit were used as the outcome. After adjustment for potential confounders, a significant inverse relationship between PA intake and CRP concentration at the third visit was observed (P for trend = 0.001, β = -0.07 (P-value = 0.001) for PA baseline; P for trend = <0.0001, β = -0.11 (P-value = 0.0004) for PA average (baseline, 2nd, 3rd)). Higher PA intake was significantly related to lower or attenuated increase in CRP concentration (P for trend = 0.002, β = -0.24 (P-value = 0.002) for PA baseline; P for trend = 0.001, β = -0.35 (P-value = 0.001) for PA average (baseline, 2nd, 3rd)). CONCLUSIONS In conclusion, dietary PA intake was inversely related to subsequent CRP concentration in both men and women aged 40 years or older in South Korea.
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Affiliation(s)
- S Jung
- Health Care Research Department, Korea Institute for Health and Social Affairs, Sejong, South Korea; Institute for Health and Society, Hanyang University, Seoul, South Korea
| | - M K Kim
- Institute for Health and Society, Hanyang University, Seoul, South Korea; Department of Preventive Medicine, College of Medicine, Hanyang University, Seoul, South Korea.
| | - B Y Choi
- Institute for Health and Society, Hanyang University, Seoul, South Korea; Department of Preventive Medicine, College of Medicine, Hanyang University, Seoul, South Korea
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Park YD, Park YJ, Park SS, Lee HL, Moon HH, Kim MK. Effects of taping therapy for carpal space expansion on electrophysiological change in patients with carpal tunnel syndrome. J Exerc Rehabil 2017. [PMID: 28702450 PMCID: PMC5498095 DOI: 10.12965//jer.1735002.501] [Citation(s) in RCA: 5] [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] [Indexed: 11/22/2022] Open
Abstract
Taping therapy is one of the most conservative treatments for carpal tunnel syndrome (CTS). Preceding research studied on pain control, grip strength, and wrist function but no studies have been reported on electrophysiolgical changes after taping therapy. The aim of this study is to evaluate the effects of taping therapy for carpal space expansion on electrophysiological in 20 female patients aged from 40s to 60s with CTS. Experimental group applied taping therapy for carpal space expansion twice a week for 4 weeks and control group did not. There were significant differences between distal motor latency (DML) and sensory nerve conduction velocity (SNCV), but no difference between compound muscle action potential and sensory nerve action potential (SNAP) after 4 weeks taping treatment. Also, there was a significant difference in DML, SNCV, and SNAP in between groups. In conclusion, taping therapy for carpal space expansion can help to reduce the pressure of the carpal tunnel in CTS patients with mild symptoms.
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Affiliation(s)
- Yeong-Dong Park
- School of Global Sport Studies, Korea University, Sejong, Korea
| | - Yun-Jin Park
- School of Global Sport Studies, Korea University, Sejong, Korea
| | - Sang-Seo Park
- School of Global Sport Studies, Korea University, Sejong, Korea
| | - Hae-Lim Lee
- School of Global Sport Studies, Korea University, Sejong, Korea
| | - Hyeong-Hun Moon
- Department of Sports Medicine, CHA University, Pocheon, Korea
| | - Myung-Ki Kim
- School of Global Sport Studies, Korea University, Sejong, Korea
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Park YD, Park YJ, Park SS, Lee HL, Moon HH, Kim MK. Effects of taping therapy for carpal space expansion on electrophysiological change in patients with carpal tunnel syndrome. J Exerc Rehabil 2017; 13:359-362. [PMID: 28702450 PMCID: PMC5498095 DOI: 10.12965/jer.1735002.501] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 06/16/2017] [Indexed: 05/07/2023] Open
Abstract
Taping therapy is one of the most conservative treatments for carpal tunnel syndrome (CTS). Preceding research studied on pain control, grip strength, and wrist function but no studies have been reported on electrophysiolgical changes after taping therapy. The aim of this study is to evaluate the effects of taping therapy for carpal space expansion on electrophysiological in 20 female patients aged from 40s to 60s with CTS. Experimental group applied taping therapy for carpal space expansion twice a week for 4 weeks and control group did not. There were significant differences between distal motor latency (DML) and sensory nerve conduction velocity (SNCV), but no difference between compound muscle action potential and sensory nerve action potential (SNAP) after 4 weeks taping treatment. Also, there was a significant difference in DML, SNCV, and SNAP in between groups. In conclusion, taping therapy for carpal space expansion can help to reduce the pressure of the carpal tunnel in CTS patients with mild symptoms.
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Affiliation(s)
- Yeong-Dong Park
- School of Global Sport Studies, Korea University, Sejong,
Korea
| | - Yun-Jin Park
- School of Global Sport Studies, Korea University, Sejong,
Korea
| | - Sang-Seo Park
- School of Global Sport Studies, Korea University, Sejong,
Korea
| | - Hae-Lim Lee
- School of Global Sport Studies, Korea University, Sejong,
Korea
| | - Hyeong-Hun Moon
- Department of Sports Medicine, CHA University, Pocheon,
Korea
| | - Myung-Ki Kim
- School of Global Sport Studies, Korea University, Sejong,
Korea
- Corresponding author: Myung-Ki Kim, http://orcid.org/0000-0002-5821-9203, School of Global Sport Studies, Korea University, Sejong Campus, 2511 Sejong-ro, Jochiwon-eup, Sejong 30019, Korea, Tel: +82-44-860-1366, Fax: +82-44-860-1589, E-mail:
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Lee JW, Kim MK, Kang HY, Kim Y. Transparent acrylic protector use for patient positioning and monitoring in robot-assisted laparoscopic prostatectomy. Br J Anaesth 2017; 118:271-272. [PMID: 28100536 DOI: 10.1093/bja/aew460] [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: 11/12/2022] Open
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Kim MK, Chon SJ, Noe EB, Roh YH, Yun BH, Cho S, Choi YS, Lee BS, Seo SK. Associations of dietary calcium intake with metabolic syndrome and bone mineral density among the Korean population: KNHANES 2008-2011. Osteoporos Int 2017; 28:299-308. [PMID: 27503170 DOI: 10.1007/s00198-016-3717-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 07/20/2016] [Indexed: 10/21/2022]
Abstract
UNLABELLED Excessive amount of calcium intake increased risk for metabolic syndrome in men. However, modest amount decreased the risk of metabolic syndrome and osteoporosis in postmenopausal women. Modest amount of calcium also increased bone mineral density (BMD) in both men and postmenopausal women. INTRODUCTION The present study aimed to evaluate the associations of dietary calcium intake with metabolic syndrome and bone mineral density (BMD) in Korean men and women, especially postmenopausal women. METHODS The study was performed using data from the Korean National Health and Nutrition Examination Survey (2008-2011) and included 14,705 participants (5953 men, 4258 premenopausal women, and 4494 postmenopausal women). Clinical and other objective characteristics, presence of metabolic syndrome, and the BMD of the femur neck and lumbar spine were evaluated according to dietary calcium intake. RESULTS There was a higher tendency for metabolic syndrome in men with a dietary calcium intake of >1200 mg/day than with ≤400 mg of calcium intake; >400 and ≤800 mg of calcium intake was helpful for postmenopausal women to decrease risk for metabolic syndrome. Overall, the group with calcium intake >400 and ≤800 mg daily had significantly increased BMD in both femoral neck and lumbar spine from both men and postmenopausal women. From both femoral neck and lumbar spine, the prevalence of osteoporosis in postmenopausal women significantly decreased in the group whose calcium intake was >400 and ≤800 mg daily. CONCLUSION Excessive dietary calcium may increase the prevalence of metabolic syndrome in men. For postmenopausal women, calcium intake does not increase the risk of metabolic syndrome, but modest amount decreases the risk. It may increase the BMD in men and postmenopausal women, and also reduce the prevalence of both osteoporosis and metabolic syndrome in postmenopausal women.
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Affiliation(s)
- M K Kim
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S J Chon
- Department of Obstetrics and Gynecology, Gil Hospital, Gachon University College of Medicine, Incheon, Republic of Korea
| | - E B Noe
- Seoul Rachel Fertility Center, Seoul, Republic of Korea
| | - Y H Roh
- Biostatistics Collaboration Unit, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - B H Yun
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S Cho
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea
- Department of Obstetrics and Gynecology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Y S Choi
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - B S Lee
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S K Seo
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea.
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Lee JW, Choi JH, Kim Y, Kim MK. Intraoperative subarachnoid haemorrhage associated with a reduction in bispectral index during cardiopulmonary bypass. Anaesth Intensive Care 2016; 44:786-787. [PMID: 27832575 DOI: 10.1177/0310057x1604400623] [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: 11/16/2022]
Affiliation(s)
- J W Lee
- Division of Anesthesiology and Pain Medicine, Cardiovascular Hospital
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Park JY, Paik ES, Kang H, Kim MK, Kim WY, Lee YY, Kim TJ, Lee JW, Bae DS, Choi CH. Single-Site Laparoscopic Radical Hysterectomy: Earlier and Further Space Development with Ligaments In Situ. J Minim Invasive Gynecol 2016. [DOI: 10.1016/j.jmig.2016.08.675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Heo EJ, Paik ES, Shim M, Kang H, Kim WY, Kim MK, Lee YY, Choi CH, Kim TJ, Lee JW, Kim BG, Bae DS. Mature Cystic Teratoma Is a Good Indication for LESS Approach: Initial Experience of an Internal Organ Retractor (IOR) Device or Barbed Suture for LESS Cystectomy. J Minim Invasive Gynecol 2016. [DOI: 10.1016/j.jmig.2016.08.673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Paik ES, Choi HJ, Shim M, Kang H, Kim WY, Kim MK, Lee YY, Choi CH, Kim TJ, Lee JW, Kim BG, Bae DS. Comparison of Surgical Outcomes of Laparoscopy and Laparotomy for Secondary Cytoreductive Surgery with Localized Single Recurrent Site Epithelial Ovarian Cancer. J Minim Invasive Gynecol 2016. [DOI: 10.1016/j.jmig.2016.08.751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Jin YH, Park BJ, Kim MK. Extreme field enhancement in nano-gap plasmonic cavity via 90% efficient coupling with silicon waveguide. Opt Express 2016; 24:25540-25547. [PMID: 27828492 DOI: 10.1364/oe.24.025540] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We propose a novel design for a sub-5-nm-gap plasmonic cavity to couple it efficiently with an integrated low loss silicon waveguide. We numerically obtain over 90% efficient coupling between a nano-gap plasmonic cavity with a modal volume of less than 10-7λ3 and a conventional silicon-on-insulator (SOI) waveguide by utilizing the anti-symmetric second-order resonance mode of the cavity and engineering its geometry to reduce the modal size to less than 5 nm. The electromagnetic field efficiently coupled to the small cavity, leading to extreme enhancement of the field intensity. For a 2-nm-gap cavity, the intensity enhancement was calculated to be more than 100,000,000 compared to that of light in an SOI waveguide.
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Kim HJ, Shin YS, Choi H, Kim MK, Jeong YB, Park JK. Undiagnosed nephrogenic diabetes insipidus as a cause of acute urinary retention in a young soldier. J ROY ARMY MED CORPS 2016. [DOI: 10.1136/jramc-2015-000471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Garcia-Martinez V, Lopez Sanchez C, Hamed W, Hamed W, Hsu JH, Ferrer-Lorente R, Alshamrani M, Pizzicannella J, Vindis C, Badi I, Korte L, Voellenkle C, Niculescu LS, Massaro M, Babaeva AR, Da Silva F, Woudstra L, Berezin A, Bae MK, Del Giudice C, Bageghni SA, Krobert K, Levay M, Vignier N, Ranieri A, Magenta A, Orlandi A, Porro B, Jeon ES, Omori Y, Herold J, Barnett GA, Grochot-Przeczek A, Korpisalo P, Deffge C, Margariti A, Rong W, Maring JA, Gambardella J, Mitrofan CG, Karpinska O, Morbidelli L, Wilkinson FL, Berezin A, Kostina AS, De Mey JGR, Kumar A, Lupieri A, Pellet-Many C, Stamatiou R, Gromotowicz A, Dickhout A, Murina M, Roka-Moiia YM, Malinova L, Diaz-Canestro C, Vigliarolo T, Cuzzocrea S, Szantai A, Medic B, Cassambai S, Korda A, Revnic CR, Borile G, Diokmetzidou A, Murfitt L, Budko A, Fiordelisi A, De Wijs-Meijler DPM, Gevaert AB, Noriega De La Colina A, Benes J, Guillermo Solache Berrocal GSB, Gafarov V, Zhebel VM, Prakaschandra R, Stepien EL, Smith LE, Carluccio MA, Timasheva Y, Paci M, Dorofeyeva NA, Chimed CH, Petelina TI, Sorop O, Genis A, Parepa IR, Tscharre M, Krestjyaninov MV, Maia-Rocha C, Borges L, Sasonko ML, Kapel SS, Stam K, Sommariva E, Stojkovic S, O'reilly J, Chiva-Blanch G, Malinova L, Evtushenko A, Skopal J, Sunderland N, Gegenava T, Charnaia MA, Di Lascio N, Tarvainen SJ, Malandraki-Miller S, Uitterdijk A, Benzoni P, Ruivo E, Humphrey EJ, Arokiaraj MC, Franco D, Garcia-Lopez V, Aranega A, Lopez-Sanchez C, Franco D, Garcia-Lopez V, Aranega A, Garcia-Martinez V, Tayel S, Khader H, El-Helbawy N, Tayel S, Alrefai A, El-Barbary H, Wu JR, Dai ZK, Yeh JL, Sanjurjo-Rodriguez C, Richaud-Patin Y, Blanco FJ, Badimon L, Raya A, Cahill PA, Diomede F, Merciaro I, Trubiani O, Nahapetyan H, Swiader A, Faccini J, Boya P, Elbaz M, Zeni F, Burba I, Bertolotti M, Capogrossi MC, Pompilio G, Raucci A, Widmer-Teske R, Dutzmann J, Bauersachs J, Donde K, Daniel JM, Sedding DG, Simionescu N, Sanda GM, Carnuta MG, Stancu CS, Popescu AC, Popescu MR, Vlad A, Dimulescu DR, Sima AV, Scoditti E, Pellegrino M, Calabriso N, Carluccio MA, Storelli C, De Caterina R, Solodenkova KS, Kalinina EV, Usachiova MN, Lappalainen J, Lee-Rueckert MDEC, Kovanen PT, Biesbroek PS, Emmens RWE, Van Rossum AC, Juffermans LJM, Niessen JWM, Krijnen PAJ, Kremzer A, Samura T, Berezina T, Gronenko E, Kim MK, Park HJ, Bae SK, Sorriento D, Ciccarelli M, Vernieri E, Campiglia P, Trimarco B, Iaccarino G, Hemmings KE, Porter KE, Ainscough JF, Drinkhill MJ, Turner NA, Hiis HG, Cosson MV, Levy FO, Wieland T, Macquart C, Chatzifrangkeskou M, Evans A, Bonne G, Muchir A, Kemp E, Avkiran M, Carlomosti F, D'agostino M, Beji S, Zaccagnini G, Maimone B, Di Stefano V, De Santa F, Cordisco S, Antonini A, Ciarapica R, Dellambra E, Martelli F, Avitabile D, Capogrossi MC, Scioli MG, Bielli A, Agostinelli S, Tarquini C, Tarallo V, De Falco S, Zaninoni A, Fiorelli S, Bianchi P, Teruzzi G, Squellerio I, Turnu L, Lualdi A, Tremoli E, Cavalca V, Lee YJ, Ju ES, Choi JO, Lee GY, Lim BK, Manickam MANOJ, Jung SH, Omiya S, Otsu K, Deffge C, Nowak S, Wagner M, Braun-Dullaeus RC, Kostin S, Daniel JM, Francke A, Subramaniam S, Kanse SM, Al-Lamee K, Schofield CJ, Egginton S, Gershlick AH, Kloska D, Kopacz A, Augustyniak A, Dulak J, Jozkowicz A, Hytonen J, Halonen P, Taavitsainen J, Tarvainen S, Hiltunen T, Liimatainen T, Kalliokoski K, Knuuti J, Yla-Herttuala S, Wagner M, Weinert S, Isermann B, Lee J, Braun-Dullaeus RC, Herold J, Cochrane A, Kelaini S, Bojdo J, Vila Gonzalez M, Hu Y, Grieve D, Stitt AW, Zeng L, Xu Q, Margariti A, Reglin B, Xiang W, Nitzsche B, Maibier M, Pries AR, Vrijsen KR, Chamuleau SAJ, Verhage V, Metz CHG, Lodder K, Van Eeuwijk ECM, Van Dommelen SM, Doevendans PA, Smits AM, Goumans MJ, Sluijter JPG, Sorriento D, Bova M, Loffredo S, Trimarco B, Iaccarino G, Ciccarelli M, Appleby S, Morrell N, Baranowska-Kuczko M, Kloza M, Ambrozewicz E, Kozlowski M, Malinowska B, Kozlowska H, Monti M, Terzuoli E, Ziche M, Mahmoud AM, Jones AM, Wilkinson JA, Romero M, Duarte J, Alexander MY, Kremzer A, Berezina T, Gronenko E, Faggian G, Kostareva AA, Malashicheva AB, Leurgans TM, Nguyen TN, Irmukhamedov A, Riber LP, Mcgeogh R, Comer S, Blanco Fernandez A, Ghigo A, Blaise R, Smirnova NF, Malet N, Vincent P, Limon I, Gayral S, Hirsch E, Laffargue M, Mehta V, Zachary I, Aidonidis I, Kramkowski K, Miltyk W, Kolodziejczyk P, Gradzka A, Szemraj J, Chabielska E, Dijkgraaf I, Bitsch N, Van Hoof S, Verhaegen F, Koenen R, Hackeng TM, Roshchupkin DI, Buravleva KV, Sergienko VI, Zhernossekov DD, Rybachuk VM, Grinenko TV, Furman N, Dolotovskaya P, Shamyunov M, Denisova T, Reiner M, Akhmedov A, Keller S, Miranda M, Briand S, Barile L, Kullak-Ublick G, Luscher T, Camici G, Guida L, Magnone M, Ameri P, Lazzarini E, Fresia C, Bruzzone S, Zocchi E, Di Paola R, Cordaro M, Crupi R, Siracusa R, Campolo M, Bruschetta G, Fusco R, Pugliatti P, Esposito E, Paloczi J, Ruivo E, Gaspar R, Dinnyes A, Kobolak J, Ferdinandy P, Gorbe A, Todorovic Z, Krstic D, Savic Vujovic K, Jovicic D, Basta Jovanovic G, Radojevic Skodric S, Prostran M, Dean S, Mee CJ, Harvey KL, Hussain A, Pena C, Paltineanu B, Voinea S, Revnic F, Ginghina C, Zaglia T, Ceriotti P, Campo A, Carullo P, Armani A, Coppini R, Vida V, Olivotto I, Stellin G, Rizzuto R, De Stefani D, Sandri M, Catalucci D, Mongillo M, Soumaka E, Kloukina I, Tsikitis M, Makridakis M, Varela A, Davos C, Vlachou A, Capetanaki Y, Iqbal MM, Bennett H, Davenport B, Pinali C, Cooper G, Cartwright E, Kitmitto A, Strutynska NA, Mys LA, Sagach VF, Franco A, Sorriento D, Trimarco B, Iaccarino G, Ciccarelli M, Verzijl A, Stam K, Van Duin R, Reiss IKM, Duncker DJ, Merkus D, Shakeri H, Orije M, Leloup AJ, Van Hove CE, Van Craenenbroeck EM, De Meyer GRY, Vrints CJ, Lemmens K, Desjardins-Creapeau L, Wu R, Lamarre-Cliche M, Larochelle P, Bherer L, Girouard H, Melenovsky M, Kvasilova A, Benes J, Ruskova K, Sedmera D, Ana Barral ABV, Martin Fernandez M, Pablo Roman Garcia PRG, Juan Carlos Llosa JCLL, Manuel Naves Diaz MND, Cesar Moris CM, Jorge B Cannata-Andia JBCA, Isabel Rodriguez IR, Voevoda M, Gromova E, Maximov V, Panov D, Gagulin I, Gafarova A, Palahniuk H, Pashkova IP, Zhebel NV, Starzhynska OL, Naidoo DP, Rawojc K, Enguita FJ, Grudzien G, Cordwell SJ, White MY, Massaro M, Scoditti E, Calabriso N, Pellegrino M, Martinelli R, Gatta V, De Caterina R, Nasibullin TR, Erdman VV, Tuktarova IA, Mustafina OE, Hyttinen J, Severi S, Vorobyov GG, Sagach VF, Batmyagmar KH, Lkhagvasuren Z, Gapon LI, Musikhina NA, Avdeeva KS, Dyachkov SM, Heinonen I, Van Kranenburg M, De Beer VJ, Octavia Y, Van Geuns RJ, Van Den Meiracker AH, Van Der Velden J, Merkus D, Duncker DJ, Everson FP, Ogundipe T, Grandjean T, De Boever P, Goswami N, Strijdom H, Suceveanu AI, Suceveanu AP, Mazilu L, Tofoleanu DE, Catrinoiu D, Rohla M, Hauser C, Huber K, Wojta H, Weiss TW, Melnikova MA, Olezov NV, Gimaev RH, Khalaf H, Ruzov VI, Adao R, Mendes-Ferreira P, Santos-Ribeiro D, Rademaker M, Leite-Moreira AF, Bras-Silva C, Alvarenga LAA, Falcao RSP, Dias RR, Lacchini S, Gutierrez PS, Michel JB, Gurfinkel YUI, Atkov OYU, Teichert M, Korn C, Mogler C, Hertel S, Arnold C, Korff T, Augustin HG, Van Duin RWB, De Wijs-Meijler DPM, Verzijl A, Duncker DJ, Merkus D, D'alessandra Y, Farina FM, Casella M, Catto V, Carbucicchio C, Dello Russso A, Stadiotti I, Brambilla S, Chiesa M, Giacca M, Colombo GI, Pompilio G, Tondo C, Ahlin F, Andric T, Tihanyi D, Wojta J, Huber K, O'connell E, Butt A, Murphy L, Pennington S, Ledwidge M, Mcdonald K, Baugh J, Watson C, Suades R, Crespo J, Estruch R, Badimon L, Dyachenko A, Ryabukho V, Evtushenko V, Saushkina YU, Lishmanov YU, Smyshlyaev K, Bykov A, Popov S, Pavlyukova E, Anfinogenova Y, Szigetfu E, Kapornai B, Forizs E, Jenei ZS, Nagy Z, Merkely B, Zima E, Cai A, Dworakowski R, Gibbs T, Piper S, Jegard N, Mcdonagh T, Gegenava M, Dementieva II, Morozov YUA, Barsanti C, Stea F, Lenzarini F, Kusmic C, Faita F, Halonen PJ, Puhakka PH, Hytonen JP, Taavitsainen JM, Yla-Herttuala S, Supit EA, Carr CA, Groenendijk BCW, Gorsse-Bakker C, Panasewicz A, Sneep S, Tempel D, Van Der Giessen WJ, Duncker DJ, Rys J, Daraio C, Dell'era P, Paloczi J, Pigler J, Eder A, Ferdinandy P, Eschenhagen T, Gorbe A, Mazo MM, Amdursky N, Peters NS, Stevens MM, Terracciano CM. Poster session 2Morphogenetic mechanisms290MiR-133 regulates retinoic acid pathway during early cardiac chamber specification291Bmp2 regulates atrial differentiation through miR-130 during early heart looping formationDevelopmental genetics294Association of deletion allele of insertion/deletion polymorphism in alpha 2B adrenoceptor gene and hypertension with or without type 2 diabetes mellitus295Association of G1359A polymorphism of the endocannabinoid type 1 receptor (CNR1) with coronary artery disease (CAD) with type 2 diabetes mellitusCell growth, differentiation and stem cells - Vascular298Gamma-secretase inhibitor prevents proliferation and migration of ductus arteriosus smooth muscle cells: a role of Notch signaling in postnatal closure of ductus arteriosus299Mesenchymal stromal-like cells (MLCs) derived from induced pluripotent stem (iPS) cells: a promising therapeutic option to promote neovascularization300Sonic Hedgehog promotes mesenchymal stem cell differentiation to vascular smooth muscle cells in cardiovacsular disease301Proinflammatory cytokine secretion and epigenetic modification in endothelial cells treated LPS-GinfivalisCell death and apoptosis - Vascular304Mitophagy acts as a safeguard mechanism against human vascular smooth muscle cell apoptosis induced by atherogenic lipidsTranscriptional control and RNA species - Vascular307MicroRNA-34a role in vascular calcification308Local delivery of a miR-146a inhibitor utilizing a clinically applicable approach attenuates neointima formation after vascular injury309Long noncoding RNA landscape of hypoxic endothelial cells310Specific circulating microRNAs levels associate with hypertension, hyperglycemia and dysfunctional HDL in acute coronary syndrome patientsCytokines and cellular inflammation - Vascular313Phosphodiesterase5A up-regulation in vascular endothelium under pro-inflammatory conditions: a newly disclosed anti-inflammatory activity for the omega-3polyunsaturated aatty acid docosahexaenoic acid314Cardiovascular risk modifying with extra-low dose anticytokine drugs in rhematoid arthritis315Conversion of human M-CSF macrophages into foam cells reduces their proinflammatory responses to classical M1-polarizing activation316Lymphocytic myocarditis coincides with increased plaque inflammation and plaque hemorrhage in coronary arteries, facilitating myocardial infarction317Serum osteoprotegerin level predictsdeclined numerous of circulating endothelial- derived and mononuclear-derived progenitor cells in patients with metabolic syndromeGrowth factors and neurohormones - Vascular320Effect of gastrin-releasing peptide (GRP) on vascular inflammationSignal transduction - Heart323A new synthetic peptide regulates hypertrophy in vitro through means of the inhibition of nfkb324Inducible fibroblast-specific knockout of p38 alpha map kinase is cardioprotective in a mouse model of isoproterenol-induced cardiac hypertrophy325Regulation of beta-adrenoceptor-evoked inotropic responses by inhibitory G protein, adenylyl cyclase isoforms 5 and 6 and phosphodiesterases326Binding to RGS3 and stimulation of M2 muscarinic acetylcholine receptors modulates the substrate specificity of p190RhoGAP in cardiac myocytes327Cardiac regulation of post-translational modifications, parylation and deacetylation in LMNA dilated cardiomyopathy mouse model328Beta-adrenergic regulation of the b56delta/pp2a holoenzyme in cardiac myocytes through b56delta phosphorylation at serine 573Nitric oxide and reactive oxygen species - Vascular331Oxidative stress-induced miR-200c disrupts the regulatory loop among SIRT1, FOXO1 and eNOS332Antioxidant therapy prevents oxidative stress-induced endothelial dysfunction and Enhances Wound Healing333Morphological and biochemical characterization of red blood cell in coronary artery diseaseCytoskeleton and mechanotransduction - Heart336Novel myosin activator, JSH compounds, increased myocardial contractility without chronotropic effect in ratsExtracellular matrix and fibrosis - Vascular339Ablation of Toll-like receptor 9 causes cardiac rupture after myocardial infarction by attenuating proliferation and differentiation of cardiac fibroblasts340Altered vascular remodeling in the mouse hind limb ischemia model in Factor VII activating protease (FSAP) deficiencyVasculogenesis, angiogenesis and arteriogenesis343Pro-angiogenic effects of proly-hydroxylase inhibitors and their potential for use in a novel strategy of therapeutic angiogenesis for coronary total occlusion344Nrf2 drives angiogenesis in transcription-independent manner: new function of the master regulator of oxidative stress response345Angiogenic gene therapy, despite efficient vascular growth, is not able to improve muscle function in normoxic or chronically ischemic rabbit hindlimbs -role of capillary arterialization and shunting346Effect of PAR-1 inhibition on collateral vessel growth in the murine hind limb model347Quaking is a key regulator of endothelial cell differentiation, neovascularization and angiogenesis348"Emerging angiogenesis" in the chick chorioallantoic membrane (CAM). An in vivo study349Exosomes from cardiomyocyte progenitor cells and mesenchymal stem cells stimulate angiogenesis in vitro and in vivo via EMMPRINEndothelium352Reciprocal regulation of GRK2 and bradykinin receptor stimulation modulate Ca2+ intracellular level in endothelial cells353The roles of bone morphogenetic proteins 9 and 10 in endothelial inflammation and atherosclerosis354The contribution of GPR55 to the L-alpha-lysophosphatidylinositol-induced vasorelaxation in isolated human pulmonary arteries355The endothelial protective ACE inhibitor Zofenoprilat exerts anti-inflammatory activities through H2S production356A new class of glycomimetic drugs to prevent free fatty acid-induced endothelial dysfunction357Endothelial progenitor cells to apoptotic endothelial cell-derived microparticles ration differentiatesas preserved from reduced ejection fractionheart failure358Proosteogenic genes are activated in endothelial cells of patients with thoracic aortic aneurysm359Endothelin ETB receptors mediate relaxing responses to insulin in pericardial resistance arteries from patients with cardiovascular disease (CVD)Smooth muscle and pericytes362CX3CR1 positive myeloid cells regulate vascular smooth muscle tone by inducing calcium oscillations via activation of IP3 receptors363A novel function of PI3Kg on cAMP regulation, role in arterial wall hyperplasia through modulation of smooth muscle cells proliferation364NRP1 and NRP2 play important roles in the development of neointimal hyperplasia in vivo365Azithromycin induces autophagy in aortic smooth muscle cellsCoagulation, thrombosis and platelets368The real time in vivo evaluation of platelet-dependent aldosterone prothrombotic action in mice369Development of a method for in vivo detection of active thrombi in mice370The antiplatelet effects of structural analogs of the taurine chloramine371The influence of heparin anticoagulant drugs on functional state of human platelets372Regulation of platelet aggregation and adenosine diphosphate release by d dimer in acute coronary syndrome (in vitro study)Oxygen sensing, ischaemia and reperfusion375Sirtuin 5 mediates brain injury in a mouse model of cerebral ischemia-reperfusion376Abscisic acid: a new player in cardiomyocyte protection from ischaemia?377Protective effects of ultramicronized palmitoylethanolamide (PEA-um) in myocardial ischaemia and reperfusion injury in vivo378Identification of stem cell-derived cardiomyocytes using cardiac specific markers and additional testing of these cells in simulated ischemia/reperfusion system379Single-dose intravenous metformin treatment could afford significant protection of the injured rat kidney in an experimental model of ischemia-reperfusion380Cardiotoxicity of long acting muscarinic receptor antagonists used for chronic obstructive pulmonary disease381Dependence antioxidant potential on the concentration of amino acids382The impact of ischemia-reperfusion on physiological parameters,apoptosis and ultrastructure of rabbit myocardium with experimental aterosclerosisMitochondria and energetics385MicroRNA-1 dependent regulation of mitochondrial calcium uniporter (MCU) in normal and hypertrophied hearts386Mitochondrial homeostasis and cardioprotection: common targets for desmin and aB-crystallin387Overexpression of mitofusin-2 (Mfn2) and associated mitochondrial dysfunction in the diabetic heart388NO-dependent prevention of permeability transition pore (MPTP) opening by H2S and its regulation of Ca2+ accumulation in rat heart mitochondria389G protein coupled receptor kinase 2 (GRK2) is fundamental in recovering mitochondrial morphology and function after exposure to ionizing radiation (IR)Gender issues392Sex differences in pulmonary vascular control; focus on the nitric oxide pathwayAging395Heart failure with preserved ejection fraction develops when feeding western diet to senescence-accelerated mice396Cardiovascular markers as predictors of cognitive decline in elderly hypertensive patients397Changes in connexin43 in old rats with volume overload chronic heart failureGenetics and epigenetics400Calcium content in the aortic valve is associated with 1G>2G matrix metalloproteinase 1 polymorphism401Neuropeptide receptor gene s (NPSR1) polymorphism and sleep disturbances402Endothelin-1 gene Lys198Asn polymorphism in men with essential hypertension complicated and uncomplicated with chronic heart failure403Association of common polymorphisms of the lipoprotein lipase and pon1 genes with the metabolic syndrome in a sample of community participantsGenomics, proteomics, metabolomics, lipidomics and glycomics405Gene expression quantification using multiplexed color-coded probe pairs to determine RNA content in sporadic cardiac myxoma406Large-scale phosphorylation study of the type 2 diabetic heart subjected to ischemia / reperfusion injury407Transcriptome-based identification of new anti-inflammatory properties of the olive oil hydroxytyrosol in vascular endothelial cell under basal and proinflammatory conditions408Gene polymorphisms combinations and risk of myocardial infarctionComputer modelling, bioinformatics and big data411Comparison of the repolarization reserve in three state-of-the-art models of the human ventricular action potentialMetabolism, diabetes mellitus and obesity414Endothelial monocyte-activating polypeptide-II improves heart function in type -I Diabetes mellitus415Admission glucose level is independent predictor of impaired left ventricular function in patients with acute myocardial infarction: a two dimensional speckle-tracking echocardiography study416Association between biochemical markers of lipid profile and inflammatory reaction and stiffness of the vascular wall in hypertensive patients with abdominal obesity417Multiple common co-morbidities produce left ventricular diastolic dysfunction associated with coronary microvascular dysfunction, oxidative stress and myocardial stiffening418Investigating the cardiovascular effects of antiretroviral drugs in a lean and high fat/sucrose diet rat model of obesity419Statins in the treatment of non-alcoholic steatohepatitis (NASH). Our experience from a 2-year prospective study in Constanta County, Romania420Epicardial adipose tissue as a predictor of cardiovascular outcome in patients with ACS undergoing PCI?Arterial and pulmonary hypertension423Dependence between heart rhythm disorers and ID polymorphism of ACE gene in hypertensive patients424Molecular mechanisms underlying the beneficial effects of Urocortin 2 in pulmonary arterial hypertension425Inhibition of TGf-b axis and action of renin-angiotensin system in human ascending aorta aneurysms426Early signs of microcirculation and macrocirculation abnormalities in prehypertension427Vascular smooth muscle cell-expressed Tie-2 controls vascular tone428Cardiac and vascular remodelling in the development of chronic thrombo-embolic pulmonary hypertension in a novel swine modelBiomarkers431Arrhythmogenic cardiomyopathy: a new, non invasive biomarker432Can circulating microRNAs distinguish type 1 and type 2 myocardial infarction?433Design of a high-throughput multiplex proteomics assay to identify left ventricular diastolic dysfunction in diabetes434Monocyte-derived and P-selectin-carrying microparticles are differently modified by a low fat diet in patients with cardiovascular risk factors who will and who will not develop a cardiovascular event435Red blood cell distribution width assessment by polychromatic interference microscopy of thin films in chronic heart failure436Invasive and noninvasive evaluation of quality of radiofrequency-induced cardiac denervation in patients with atrial fibrillation437The effect of therapeutic hypothermia on the level of brain derived neurotrophic factor (BDNF) in sera following cardiopulmonary resustitation438Novel biomarkers to predict outcome in patients with heart failure and severe aortic stenosis439Biological factors linking depression and anxiety to cardiovascular disease440Troponins and myoglobin dynamic at coronary arteries graftingInvasive, non-invasive and molecular imaging443Diet composition effects on the genetic typing of the mouse ob mutation: a micro-ultrasound characterization of cardiac function, macro and micro circulation and liver steatosis444Characterization of pig coronary and rabbit aortic lesions using IV-OCT quantitative analysis: correlations with histologyGene therapy and cell therapy447Enhancing the survival and angiogenic potential of mouse atrial mesenchymal cells448VCAM-1 expression in experimental myocardial infarction and its relation to bone marrow-derived mononuclear cell retentionTissue engineering451Advanced multi layered scaffold that increases the maturity of stem cell-derived human cardiomyocytes452Response of engineered heart tissue to simulated ischemia/reperfusion in the presence of acute hyperglycemic conditions453Serum albumin hydrogels prevent de-differentiation of neonatal cardiomyocytes454A novel paintbrush technique for transfer of low viscosity ultraviolet light curable cyan methacrylate on saline immersed in-vitro sheep heart. Cardiovasc Res 2016. [DOI: 10.1093/cvr/cvw149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Song T, Kim MK, Kim ML, Jung YW, Yun BS, Seong SJ, Kwon SH. Impact of opportunistic salpingectomy on anti-Müllerian hormone in patients undergoing laparoscopic hysterectomy: a multicentre randomised controlled trial. BJOG 2016; 124:314-320. [DOI: 10.1111/1471-0528.14182] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2016] [Indexed: 01/24/2023]
Affiliation(s)
- T Song
- Department of Obstetrics & Gynaecology; Kangbuk Samsung Hospital; Sungkyunkwan University School of Medicine; Seoul Korea
| | - MK Kim
- Department of Obstetrics & Gynaecology; CHA Gangnam Medical Centre; CHA University; Seoul Korea
| | - M-L Kim
- Department of Obstetrics & Gynaecology; CHA Gangnam Medical Centre; CHA University; Seoul Korea
| | - YW Jung
- Department of Obstetrics & Gynaecology; CHA Gangnam Medical Centre; CHA University; Seoul Korea
| | - BS Yun
- Department of Obstetrics & Gynaecology; CHA Gangnam Medical Centre; CHA University; Seoul Korea
| | - SJ Seong
- Department of Obstetrics & Gynaecology; CHA Gangnam Medical Centre; CHA University; Seoul Korea
| | - S-H Kwon
- Department of Obstetrics & Gynaecology; Dongsan Hospital; Keimyung University School of Medicine; Daegu Korea
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Kim MK, Han W. Abstract P3-04-05: Prognostic effect of semiquantitative measurement of PgR in luminal type breast cancer. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p3-04-05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: The identification of prognostic factors for hormone receptor(HR)-positive and human epidermal growth factor receptor 2(HER2)-negative breast cancer is an important issue for the accurate determination of the indications for chemotherapy. The progesterone receptor(PgR) is a downstream molecule induced by transcriptional activation of estrogen signaling. In recent report, quantitatively low PgR expression was significantly associated with a poorer prognosis for patients treated with anastrozole and/or tamoxifen. These findings seem to suggest that the clinically used Ki-67-based IHC classification of luminal subtypes is inaccurate and that semiquantitative measurement of PgR expression can improve the IHC-based classification.
Method: 1327 consecutive patients with ER and/or PgR-positive HER2-negative invasive breast cancer treated with surgery and adjuvant treatment at the Seoul National University Hospital from January 2009 to December 2011 were reviewed. All patients had been pathologically diagnosed with breast cancer, and patients who had received chemotherapy or endocrine therapy before surgery were included. ER, PgR, HER2, and Ki-67 were determined from surgically resected, formalin-fixed, paraffin-embedded tumor tissue. The RFS and OS in Kaplan-Meier plots for the PgR high and low expression groups was compared using the log-rank test. Univariate and multivariate analyses of DFS and OS in relation to various factors were performed with a Cox proportional hazards model, which yielded the HR and 95% of CI for each variable.
Results: Based on pathology data of semiquantitative measurement of the percentage of PgR-positive cells, patients were separated into two groups with PgR percentage cutoff 20%. Among 1372 patients, 665(48.5%) showed high PgR expression, 707(51.5%) showed low PgR expression. PgR expression was relatively high in younger age(<50 years, p<0.001). Higher PgR expression was related to low Ki-67 expression(<10%, p=0.003), and low cancer stage(p<0.001). The DFS and OS of patients in the high PgR subset were significantly better than the low PgR subset only in patients under 50years old.(p=0.005 and 0.037) Cox analysis showed that low PgR expression(HR, 3.06; 95% CI, 1.44-6.47) and negative ER expression(HR, 19.68; 95% CI, 5.89-65.80) were significant independent risk factors for DFS. Low PgR expression(HR, 5.66; 95% CI 1.62-19.74) and high Ki-67 expression(HR 1.06; 95% CI 1.01-1.17) were significant independent risk factors for OS.
Conclusion: We were able to demonstrate that high PgR expression is associated with a better prognosis for luminal type breast cancer. The semiquantitative determination of PgR expression might thus improve the accuracy of the IHC-based classification of luminal A and luminal B breast cancer, especially for premenopausal patients.
Citation Format: Kim MK, Han W. Prognostic effect of semiquantitative measurement of PgR in luminal type breast cancer. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P3-04-05.
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Affiliation(s)
- MK Kim
- Kangwon National University Hospital, Chuncheon, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea
| | - W Han
- Kangwon National University Hospital, Chuncheon, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea
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Hernandez L, Kim MK, Noonan AM, Sagher E, Kohlhammer H, Wright G, Lyle LT, Steeg PS, Anver M, Bowtell DD, Annunziata CM. A dual role for Caspase8 and NF- κB interactions in regulating apoptosis and necroptosis of ovarian cancer, with correlation to patient survival. Cell Death Discov 2015; 1:15053. [PMID: 28179987 PMCID: PMC5198842 DOI: 10.1038/cddiscovery.2015.53] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 09/24/2015] [Accepted: 09/26/2015] [Indexed: 12/15/2022] Open
Abstract
Ovarian cancer is a deadly disease characterized by primary and acquired resistance to chemotherapy. We previously associated NF-κB signaling with poor survival in ovarian cancer, and functionally demonstrated this pathway as mediating proliferation, invasion and metastasis. We aimed to identify cooperating pathways in NF-κB-dependent ovarian cancer cells, using genome-wide RNA interference as a loss-of-function screen for key regulators of cell survival with IKKβ inhibition. Functional genomic screen for interactions with NF-κB in ovarian cancer showed that cells depleted of Caspase8 died better with IKKβ inhibition. Overall, low Caspase8 was associated with shorter overall survival in three independent gene expression data sets of ovarian cancers. Conversely, Caspase8 expression was markedly highest in ovarian cancer subtypes characterized by strong T-cell infiltration and better overall prognosis, suggesting that Caspase8 expression increased chemotherapy-induced cell death. We investigated the effects of Caspase8 depletion on apoptosis and necroptosis of TNFα-stimulated ovarian cancer cell lines. Inhibition of NF-κB in ovarian cancer cells switched the effects of TNFα signaling from proliferation to death. Although Caspase8-high cancer cells died by apoptosis, Caspase8 depletion downregulated NF-κB signaling, stabilized RIPK1 and promoted necroptotic cell death. Blockage of NF-κB signaling and depletion of cIAP with SMAC-mimetic further rendered these cells susceptible to killing by necroptosis. These findings have implications for anticancer strategies to improve outcome for women with low Caspase8-expressing ovarian cancer.
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Affiliation(s)
- L Hernandez
- Women’s Malignancies Branch, National Cancer Institute,
Bethesda, MD
20892-1906, USA
| | - M K Kim
- Women’s Malignancies Branch, National Cancer Institute,
Bethesda, MD
20892-1906, USA
| | - A M Noonan
- Women’s Malignancies Branch, National Cancer Institute,
Bethesda, MD
20892-1906, USA
| | - E Sagher
- Women’s Malignancies Branch, National Cancer Institute,
Bethesda, MD
20892-1906, USA
| | - H Kohlhammer
- Metabolism Branch, Center for Cancer Research, National Cancer Institute,
Bethesda, MD
20892-1906, USA
| | - G Wright
- Biometric Research Branch, Division of Cancer Treatment and Diagnosis, National
Cancer Institute, Bethesda, MD
20892-1906, USA
| | - L T Lyle
- Women’s Malignancies Branch, National Cancer Institute,
Bethesda, MD
20892-1906, USA
| | - P S Steeg
- Women’s Malignancies Branch, National Cancer Institute,
Bethesda, MD
20892-1906, USA
| | - M Anver
- Pathology/Histotechnology Laboratory, LASP, Leidos Biomedical Research, Inc.,
Frederick, MD
21702-1201, USA
| | - D D Bowtell
- Centre for Cancer Genomics and Predictive Medicine, Peter MacCallum Cancer
Centre, East Melbourne, Victoria, Australia
- The Department of Pathology, University of Melbourne, Parkville,
Victoria, Australia
| | - on behalf of the Australian Ovarian Cancer Study Group
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- Women’s Malignancies Branch, National Cancer Institute,
Bethesda, MD
20892-1906, USA
- Metabolism Branch, Center for Cancer Research, National Cancer Institute,
Bethesda, MD
20892-1906, USA
- Biometric Research Branch, Division of Cancer Treatment and Diagnosis, National
Cancer Institute, Bethesda, MD
20892-1906, USA
- Pathology/Histotechnology Laboratory, LASP, Leidos Biomedical Research, Inc.,
Frederick, MD
21702-1201, USA
- Centre for Cancer Genomics and Predictive Medicine, Peter MacCallum Cancer
Centre, East Melbourne, Victoria, Australia
- The Department of Pathology, University of Melbourne, Parkville,
Victoria, Australia
| | - C M Annunziata
- Women’s Malignancies Branch, National Cancer Institute,
Bethesda, MD
20892-1906, USA
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