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Kim SG, Russel SM, Stack TJ, Frank-Ito DO, Farzal Z, Ebert CS, Buckmire RA, DeMason CE, Shah RN. Limitations in Faculty Advancement for Underrepresented Groups in Academic Otolaryngology. Laryngoscope 2024; 134:1625-1632. [PMID: 37847098 PMCID: PMC10947976 DOI: 10.1002/lary.31110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 09/21/2023] [Accepted: 09/29/2023] [Indexed: 10/18/2023]
Abstract
OBJECTIVE Despite the increasing racial diversity of the United States, representation in academic medicine faculty does not reach concordance with the general population and worsens with higher rank. Few studies have examined this within academic Otolaryngology and surgical subspecialties. This project aims to compare rank equity in academic Otolaryngology on self-reported gender and race/ethnicity between the years 2000 and 2020. METHODS Publicly available data were obtained from the Association of American Medical Colleges under the "Data & Reports" section for the years 2000 and 2020. The report comprised of full-time faculty from all U.S. medical schools. To determine parity between faculty ranks across gender and race/ethnicity, rank equity index (REI) was calculated for associate/assistant, professor/associate, and professor/assistant professor comparisons. RESULTS The percentage of women faculty in Otolaryngology has increased from 21% in 2000 to 37% in 2020; however, they did not achieve parity at all rank comparisons for both years. On the contrary, men were above parity at all rank comparisons. Improvements in rank equity occurred for Black/African American (Black) and Hispanic Latino/Spanish Origin (Latine) faculty between the years 2000 and 2020; however, when accounting for gender, benefits were concentrated among men. CONCLUSION Advancement along the academic ladder is limited for women of all racial groups in academic Otolaryngology. While improved rank equity was seen for Black and Latine faculty, these improvements were largely among men. Future directions should aim to identify barriers to recruitment, retention, and promotion for women and underrepresented in medicine (URiM) academic otolaryngologists and create interventions that diversify Otolaryngology faculty at all ranks. LEVEL OF EVIDENCE NA Laryngoscope, 134:1625-1632, 2024.
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Affiliation(s)
- Sul Gi Kim
- University of North Carolina School of Medicine Chapel Hill, Chapel Hill, North Carolina
| | - Sarah M. Russel
- Department of Otolaryngology-Head and Neck Surgery, University of North Carolina School of Medicine, Chapel Hill, NC
| | - Taylor J. Stack
- University of North Carolina School of Medicine Chapel Hill, Chapel Hill, North Carolina
| | - Dennis O. Frank-Ito
- Department of Head and Neck Surgery & Communication Sciences, Duke University, Durham, North Carolina
| | - Zainab Farzal
- Department of Otolaryngology- Head and Neck Surgery, University of California, San Francisco, California
| | - Charles S. Ebert
- Department of Otolaryngology-Head and Neck Surgery, University of North Carolina School of Medicine, Chapel Hill, NC
| | - Robert A. Buckmire
- Department of Otolaryngology-Head and Neck Surgery, University of North Carolina School of Medicine, Chapel Hill, NC
| | - Christie E. DeMason
- Department of Otolaryngology-Head and Neck Surgery, University of North Carolina School of Medicine, Chapel Hill, NC
| | - Rupali N. Shah
- Department of Otolaryngology-Head and Neck Surgery, University of North Carolina School of Medicine, Chapel Hill, NC
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Kim SG, Menapace DC, Mims MM, Shockley WW, Clark JM. Age-Related Histologic and Biochemical Changes in Auricular and Nasal Cartilages. Laryngoscope 2024; 134:1220-1226. [PMID: 37676075 DOI: 10.1002/lary.30990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 06/13/2023] [Accepted: 08/08/2023] [Indexed: 09/08/2023]
Abstract
OBJECTIVE Analyze age-related changes in histologic features and biochemical properties of human auricular cartilage and two subsites of nasal cartilages (quadrangular cartilage and dorsal septal articulation with upper lateral cartilages). STUDY DESIGN Prospective cross-sectional study of nasal and auricular cartilages from seventy-three (73) live donors. METHODS Auricular cartilage (AC), quadrangular cartilage (QC), and dorsal septal cartilage articulation (DSA) with the upper lateral cartilage (ULCs) were collected intraoperatively. Histochemical staining was used: Safranin O for glycosaminoglycans (GAGs), Verhoeff's for elastin, and Masson's trichrome for collagen. ImageJ2 software was used to calculate cell count and percent stained for each cartilage type. R studio "ggplot" package was used to visualize age versus cell count or percent stained. RESULTS Participant ages ranged from 20 to 77 years, average 46.5 years. There was a significant decline in GAGs with age for the DSA subsite, (n = 64, p < 0.001). Significant increase in collagen content with age was observed for DSA subsite (n = 66, p < 0.001) and the QC subsite (n = 64, p < 0.05). There was a statistically insignificant decline in elastin with age (n = 41, p = 0.309) for AC. Cell count declined with age at all cartilage subsites. CONCLUSION Our findings confirm that there were age-related decreases in cartilage glycosaminoglycan content, and chondrocyte cell count in both auricular and nasal cartilages. We have also confirmed that collagen content increases with age for both auricular and nasal cartilage. The histologic findings while not statistically significant in all comparisons, provides additional evidence that there is some loss of structural integrity and flexibility in nasal and auricular cartilage with aging. LEVEL OF EVIDENCE NA Laryngoscope, 134:1220-1226, 2024.
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Affiliation(s)
- Sul Gi Kim
- University of North Carolina School of Medicine, Chapel Hill, North Carolina, U.S.A
| | - Deanna C Menapace
- Division of Facial Plastic & Reconstructive Surgery, Mayo Clinic, Jacksonville, Florida, U.S.A
| | - Mark M Mims
- Division of Facial Plastic & Reconstructive Surgery, University of Oklahoma, Oklahoma City, Oklahoma, U.S.A
| | - William W Shockley
- Division of Facial Plastic & Reconstructive Surgery, University of North Carolina, Chapel Hill, North Carolina, U.S.A
| | - J Madison Clark
- Division of Facial Plastic & Reconstructive Surgery, University of North Carolina, Chapel Hill, North Carolina, U.S.A
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Lee DW, Lee HS, Kim SG, Kim KJ, Jung SJ. The rocky road to freedom: number of countries transited during defection and risk of metabolic syndrome among North Korean Refugees in South Korea. Public Health 2023; 221:208-215. [PMID: 37490839 DOI: 10.1016/j.puhe.2023.06.019] [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: 11/24/2022] [Revised: 05/22/2023] [Accepted: 06/15/2023] [Indexed: 07/27/2023]
Abstract
OBJECTIVES North Korean Refugees (NKRs) undergo defection, and this has been shown to impact their current health status in South Korea. However, little is understood about how the defection process is related to metabolic syndrome (MetS). This study regarded the defection process to be a quasi-measurement of traumatic experience and investigated whether defection was a risk factor for MetS among NKRs living in South Korea. STUDY DESIGN This cross-sectional study obtained data from the Korea University Anam Hospital in Seoul. NKRs (N = 847) voluntarily completed questionnaires and underwent at least one medical examination between October 2008 and July 2021. METHODS Multivariable logistic regression models were used to evaluate whether the number of countries transited by NKRs was associated with MetS by controlling for covariates. RESULTS The prevalence of MetS among male and female NKRs in South Korea was 12.3% and 13.3%, respectively. The highest prevalence of MetS (33.4%) was among NKRs who had transited two countries. The number of months in transit countries (mean: 49.9 ± 51.7) and period of residence in South Korea (mean: 40.9 ± 40.9 months) were also considered. NKRs who transited three countries had a higher probability of MetS (odds ratio [OR] 2.660, 95% confidence interval [CI] 1.161-6.097) than those who travelled directly to South Korea. NKRs who transited three countries and had only resided in South Korea for a short period had a higher probability of MetS (OR 3.424, 95% CI 1.149-10.208) than those who have lived in South Korea for a longer period. CONCLUSIONS Considering the social vulnerability of NKRs and consequential health problems, there is an urgent need for appropriate support from the government and society.
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Affiliation(s)
- D W Lee
- Department of Preventive Medicine, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea; Institute of Health Services Research, Yonsei University, Seoul, 03722, Republic of Korea
| | - H S Lee
- Research Investment for Global Health Technology Fund Foundation, Seoul, 03145, Republic of Korea
| | - S G Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Korea University College of Medicine, Seoul, 02841, Republic of Korea; Department of Healthcare and Medicine for Unified Korea, Korea University College of Medicine, Seoul, 02842, Republic of Korea
| | - K J Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Korea University College of Medicine, Seoul, 02841, Republic of Korea.
| | - S J Jung
- Department of Preventive Medicine, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea; Department of Public Health, Graduate School, Yonsei University, Seoul, 03722, Republic of Korea; Center for Global Health, Massachusetts General Hospital, Boston, MA, 02114, USA; Harvard Center for Population and Developmental Studies, Cambridge, MA, 02138, USA.
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Cha SM, Shin HD, Kim YK, Kim SG. Finger injuries by eyebrow razor blades in infants. Hand Surg Rehabil 2023; 42:80-85. [PMID: 36336263 DOI: 10.1016/j.hansur.2022.10.004] [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: 06/17/2022] [Revised: 10/04/2022] [Accepted: 10/07/2022] [Indexed: 11/06/2022]
Abstract
Infants are occasionally injured while playing with their mother's eyebrow razor, and we have treated several infants with flexor tendon injuries, which in some cases were accompanied by damage to the corresponding digital nerves and/or vessels. Here, we report the outcomes in a retrospective case series, with a review of literature. Between January 2013 and October 2019, 8 patients who met our inclusion criteria were initially investigated. The inclusion criteria were: (1) injured by an eyebrow razor during fiddling or grasping, and (2) the availability of complete medical records and radiological data, with follow-up of at least 2 years. The core sutures were performed using a modified Becker (4-strand) method for flexor digitorum profundus (FDP). Nerves and/or vessels were repaired under microscopy. A long-arm mitten cast was then applied, with the fingers slightly flexed in a resting position, for 3 weeks. Then, the children were allowed to return to unrestricted activity. Formal outpatient hand therapy was not performed. Mean postnatal age was 6.3 months. The FDP was injured in zones 1 and 2 in 3 and 5 infants, respectively. Most of the infants were injured near a dressing table, in the bedroom used by their mother. The colors of these razors were all bright, except for one achromatic (white) razor. All of the razors had been left uncovered, without their cap, or were left open in the case of hinged razors. At a mean follow-up of 35.8 months, range of motion was evaluated by the Strickland and modified Strickland methods; all results were "excellent". We encountered no significant complications in any digit: neuroma, tendon retear, stiffness or necrosis. Uncapped or unfolded colorful eyebrow razors pose a high risk of tendon section with concurrent neurovascular injury in infants. Although satisfactory outcomes can be expected, it seems important to prevent the injury through fastidious parental care and changing razor design and color. LEVEL OF EVIDENCE: Level IV, retrospective case series.
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Affiliation(s)
- S M Cha
- Department of Orthopedic Surgery, Regional Rheumatoid and Degenerative Arthritis Center, Chungnam National University Hospital, Chungnam National University School of Medicine, 266 Munwha-ro, Jung-Gu, 35015 Daejeon, Republic of Korea
| | - H D Shin
- Department of Orthopedic Surgery, Regional Rheumatoid and Degenerative Arthritis Center, Chungnam National University Hospital, Chungnam National University School of Medicine, 266 Munwha-ro, Jung-Gu, 35015 Daejeon, Republic of Korea.
| | - Y K Kim
- Department of Orthopedic Surgery, Regional Rheumatoid and Degenerative Arthritis Center, Chungnam National University Hospital, Chungnam National University School of Medicine, 266 Munwha-ro, Jung-Gu, 35015 Daejeon, Republic of Korea
| | - S G Kim
- Department of Orthopedic Surgery, Regional Rheumatoid and Degenerative Arthritis Center, Chungnam National University Hospital, Chungnam National University School of Medicine, 266 Munwha-ro, Jung-Gu, 35015 Daejeon, Republic of Korea
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Ledbetter EC, Kim SG, Schaefer DM, Liotta JL, Bowman DD, Lejeune M. Detection of free-living amoebae in domestic cats with and without naturally-acquired keratitis. Vet J 2021; 274:105712. [PMID: 34182073 DOI: 10.1016/j.tvjl.2021.105712] [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: 02/04/2021] [Revised: 06/21/2021] [Accepted: 06/22/2021] [Indexed: 10/21/2022]
Abstract
Pathogenic free-living amoebae, most notably Acanthamoeba spp., are important pathogens of the human cornea. The importance of infection with free-living amoebae in cats with keratitis is currently unclear. The aim of this study was to determine the frequency of amoeba detection in corneas of cats with naturally-acquired keratitis and in the ocular surface microflora of cats without ocular disease. Clinical ophthalmic and in vivo corneal confocal microscopic examinations were performed on 60 cats with keratitis. Corneal scrapings were analyzed by amoeba culture; cytological evaluation; and Acanthamoeba, Hartmannella, and Vahlkampfia PCR assays. Following ophthalmic examination, conjunctival specimens collected from 60 cats without clinically apparent ocular disease were analyzed similarly. In one cat with ulcerative keratitis, amoeba cysts and trophozoites were detected by in vivo corneal confocal microscopy; an Acanthamoeba sp. was isolated from corneal specimens and detected by Acanthamoeba PCR assay; and suppurative corneal inflammation was present cytologically. An Acanthamoeba sp. was isolated from conjunctival specimens from one cat without clinically apparent ocular disease, but with suppurative inflammation demonstrated cytologically. Both Acanthamoeba isolates belonged to the T4 genotype. Naegleria-like amoebae were isolated in samples from two cats with keratitis and seven cats without clinical ocular disease, but amoebae were not detected by the other assays in these samples. Amoeba detection by culture was significantly (P = 0.01) associated with cytologically diagnosed corneoconjunctival inflammation. This study identified naturally-acquired Acanthamoeba keratitis in cats. Detection of Naegleria-like amoebae in samples from cats with and without keratitis is of uncertain pathological significance.
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Affiliation(s)
- E C Ledbetter
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
| | - S G Kim
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - D M Schaefer
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - J L Liotta
- Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - D D Bowman
- Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - M Lejeune
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
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Kwon W, Kim H, Han Y, Hwang YJ, Kim SG, Kwon HJ, Vinuela E, Járufe N, Roa JC, Han IW, Heo JS, Choi SH, Choi DW, Ahn KS, Kang KJ, Lee W, Jeong CY, Hong SC, Troncoso AT, Losada HM, Han SS, Park SJ, Kim SW, Yanagimoto H, Endo I, Kubota K, Wakai T, Ajiki T, Adsay NV, Jang JY. Role of tumour location and surgical extent on prognosis in T2 gallbladder cancer: an international multicentre study. Br J Surg 2020; 107:1334-1343. [PMID: 32452559 DOI: 10.1002/bjs.11618] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Revised: 02/29/2020] [Accepted: 03/16/2020] [Indexed: 12/13/2022]
Abstract
BACKGROUND In gallbladder cancer, stage T2 is subdivided by tumour location into lesions on the peritoneal side (T2a) or hepatic side (T2b). For tumours on the peritoneal side (T2a), it has been suggested that liver resection may be omitted without compromising the prognosis. However, data to validate this argument are lacking. This study aimed to investigate the prognostic value of tumour location in T2 gallbladder cancer, and to clarify the adequate extent of surgical resection. METHODS Clinical data from patients who underwent surgery for gallbladder cancer were collected from 14 hospitals in Korea, Japan, Chile and the USA. Survival and risk factor analyses were conducted. RESULTS Data from 937 patients were available for evaluation. The overall 5-year disease-free survival rate was 70·6 per cent, 74·5 per cent for those with T2a and 65·5 per cent among those with T2b tumours (P = 0·028). Regarding liver resection, extended cholecystectomy was associated with a better 5-year disease-free survival rate than simple cholecystectomy (73·0 versus 61·5 per cent; P = 0·012). The 5-year disease-free survival rate was marginally better for extended than simple cholecystectomy in both T2a (76·5 versus 66·1 per cent; P = 0·094) and T2b (68·2 versus 56·2 per cent; P = 0·084) disease. Five-year disease-free survival rates were similar for extended cholecystectomies including liver wedge resection versus segment IVb/V segmentectomy (74·1 versus 71·5 per cent; P = 0·720). In multivariable analysis, independent risk factors for recurrence were presence of symptoms (hazard ratio (HR) 1·52; P = 0·002), R1 resection (HR 1·96; P = 0·004) and N1/N2 status (N1: HR 3·40, P < 0·001; N2: HR 9·56, P < 0·001). Among recurrences, 70·8 per cent were metastatic. CONCLUSION Tumour location was not an independent prognostic factor in T2 gallbladder cancer. Extended cholecystectomy was marginally superior to simple cholecystectomy. A radical operation should include liver resection and adequate node dissection.
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Affiliation(s)
- W Kwon
- Department of Surgery and Cancer Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - H Kim
- Department of Surgery and Cancer Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Y Han
- Department of Surgery and Cancer Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Y J Hwang
- School of Medicine, Kyungpook National University, Daegu, South Korea.,Kyungpook National University Chilgok Hospital, Daegu, South Korea
| | - S G Kim
- School of Medicine, Kyungpook National University, Daegu, South Korea.,Kyungpook National University Chilgok Hospital, Daegu, South Korea
| | - H J Kwon
- School of Medicine, Kyungpook National University, Daegu, South Korea.,Kyungpook National University Chilgok Hospital, Daegu, South Korea
| | - E Vinuela
- Department of Digestive Surgery, Santiago, Chile
| | - N Járufe
- Department of Digestive Surgery, Santiago, Chile
| | - J C Roa
- Pathology, Faculty of Medicine, Catholic University of Chile, Santiago, Chile
| | - I W Han
- Department of Surgery, Samsung Medical Centre, Sungkyunkwan University College of Medicine, Seoul, South Korea
| | - J S Heo
- Department of Surgery, Samsung Medical Centre, Sungkyunkwan University College of Medicine, Seoul, South Korea
| | - S-H Choi
- Department of Surgery, Samsung Medical Centre, Sungkyunkwan University College of Medicine, Seoul, South Korea
| | - D W Choi
- Department of Surgery, Samsung Medical Centre, Sungkyunkwan University College of Medicine, Seoul, South Korea
| | - K S Ahn
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, Keimyung University Dongsan Medical Centre, Daegu, South Korea
| | - K J Kang
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, Keimyung University Dongsan Medical Centre, Daegu, South Korea
| | - W Lee
- Department of Surgery, Gyeongsang National University College of Medicine, Jinju, South Korea
| | - C-Y Jeong
- Department of Surgery, Gyeongsang National University College of Medicine, Jinju, South Korea
| | - S-C Hong
- Department of Surgery, Gyeongsang National University College of Medicine, Jinju, South Korea
| | - A T Troncoso
- Department of Surgery, Universidad de la Frontera, Temuco, Chile
| | - H M Losada
- Department of Surgery, Universidad de la Frontera, Temuco, Chile
| | - S-S Han
- Department of Surgery, Centre for Liver Cancer, National Cancer Centre, Goyang, South Korea
| | - S-J Park
- Department of Surgery, Centre for Liver Cancer, National Cancer Centre, Goyang, South Korea
| | - S-W Kim
- Department of Surgery, Centre for Liver Cancer, National Cancer Centre, Goyang, South Korea
| | - H Yanagimoto
- Department of Surgery, Kansai Medical University, Hirakata, Japan
| | - I Endo
- Department of Gastroenterological Surgery, Graduate School of Medicine, Yokohama City University, Yokohama, Japan
| | - K Kubota
- Department of Gastroenterological Surgery, Dokkyo Medical University, Tochigi, Japan
| | - T Wakai
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - T Ajiki
- Division of Hepato-Biliary-Pancreatic Surgery, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - N V Adsay
- Department of Pathology, Koc University, Istanbul, Turkey.,Department of Pathology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - J-Y Jang
- Department of Surgery and Cancer Research Institute, Seoul National University College of Medicine, Seoul, South Korea
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Ahn HK, Lee H, Kim SG, Hyun SH. Pre-treatment 18F-FDG PET-based radiomics predict survival in resected non-small cell lung cancer. Clin Radiol 2019; 74:467-473. [PMID: 30898382 DOI: 10.1016/j.crad.2019.02.008] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 02/12/2019] [Indexed: 12/28/2022]
Abstract
AIM To assess the prognostic value of 2-[18F]-fluoro-2-deoxy-d-glucose (FDG) positron-emission tomography (PET)-based radiomics using a machine learning approach in patients with non-small cell lung cancer (NSCLC). MATERIALS AND METHODS Ninety-three patients with stage I-III NSCLC who underwent combined PET/computed tomography (CT) followed by curative resection. A total of 35 unique quantitative radiomic features was extracted from the PET images, which included imaging phenotypes such as pixel intensity, shape, and texture. Radiomic features were ranked based on score according to their correlation with disease recurrence status within a 3-year follow-up. The recurrence risk classification performances of machine learning algorithms (random forest, neural network, naive Bayes, logistic regression, and support vector machine) using the 20 best-ranked features were compared using the areas under the receiver operating characteristic curve (AUC) and validated by the random sampling method. RESULTS Contrast and busyness texture features from neighbourhood grey-level difference matrix were found to be the two best predictors of disease recurrence. The random forest model obtained the best performance (AUC: 0.956, accuracy: 0.901, F1 score: 0.872, precision: 0.905, recall: 0.842), followed by the neural network model (AUC: 0.871, accuracy: 0.780, F1 score: 0.708, precision: 0.755, recall: 0.666). CONCLUSION A PET-based radiomic model was developed and validated for risk classification in NSCLC. The machine learning approach with random forest classifier exhibited good performance in predicting the recurrence risk. Radiomic features may help clinicians to improve the risk stratification for clinical practice.
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Affiliation(s)
- H K Ahn
- Division of Hematology and Oncology, Department of Internal Medicine, Gachon University Gil Medical Center, Incheon, Republic of Korea
| | - H Lee
- Department of Nuclear Medicine, Gachon University Gil Medical Center, Incheon, Republic of Korea
| | - S G Kim
- Department of Nuclear Medicine, Gachon University Gil Medical Center, Incheon, Republic of Korea
| | - S H Hyun
- Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
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Kim SG, Malek M, Sigurdsson A, Lin LM, Kahler B. Regenerative endodontics: a comprehensive review. Int Endod J 2018; 51:1367-1388. [PMID: 29777616 DOI: 10.1111/iej.12954] [Citation(s) in RCA: 186] [Impact Index Per Article: 31.0] [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: 03/27/2018] [Accepted: 05/14/2018] [Indexed: 12/13/2022]
Abstract
The European Society of Endodontology and the American Association for Endodontists have released position statements and clinical considerations for regenerative endodontics. There is increasing literature on this field since the initial reports of Iwaya et al. (Dental Traumatology, 17, 2001, 185) and Banchs & Trope (Journal of Endodontics, 30, 2004, 196). Endogenous stem cells from an induced periapical bleeding and scaffolds using blood clot, platelet rich plasma or platelet-rich fibrin have been utilized in regenerative endodontics. This approach has been described as a 'paradigm shift' and considered the first treatment option for immature teeth with pulp necrosis. There are three treatment outcomes of regenerative endodontics; (i) resolution of clinical signs and symptoms; (ii) further root maturation; and (iii) return of neurogenesis. It is known that results are variable for these objectives, and true regeneration of the pulp/dentine complex is not achieved. Repair derived primarily from the periodontal and osseous tissues has been shown histologically. It is hoped that with the concept of tissue engineering, namely stem cells, scaffolds and signalling molecules, that true pulp regeneration is an achievable goal. This review discusses current knowledge as well as future directions for regenerative endodontics. Patient-centred outcomes such as tooth discolouration and possibly more appointments with the potential for adverse effects needs to be discussed with patients and parents. Based on the classification of Cvek (Endodontics and Dental Traumatology, 8, 1992, 45), it is proposed that regenerative endodontics should be considered for teeth with incomplete root formation although teeth with near or complete root formation may be more suited for conventional endodontic therapy or MTA barrier techniques. However, much is still not known about clinical and biological aspects of regenerative endodontics.
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Affiliation(s)
- S G Kim
- Division of Endodontics, Columbia University College of Dental Medicine, New York, NY, USA
| | - M Malek
- Department of Endodontics, New York University College of Dentistry, New York, NY, USA
| | - A Sigurdsson
- Department of Endodontics, New York University College of Dentistry, New York, NY, USA
| | - L M Lin
- Department of Endodontics, New York University College of Dentistry, New York, NY, USA
| | - B Kahler
- The University of Queensland School of Dentistry, Brisbane, Australia
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Kim NH, Choi J, Kim NH, Choi KM, Baik SH, Lee J, Kim SG. Dipeptidyl peptidase-4 inhibitor use and risk of diabetic retinopathy: A population-based study. Diabetes Metab 2018; 44:361-367. [PMID: 29752167 DOI: 10.1016/j.diabet.2018.03.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 03/09/2018] [Accepted: 03/11/2018] [Indexed: 10/17/2022]
Abstract
AIMS This study examined whether dipeptidyl peptidase (DPP)-4 inhibitor use is beneficial or harmful to diabetic retinopathy (DR) compared with other glucose-lowering agents in patients with type 2 diabetes (T2D). METHODS From a population-based cohort provided by the National Health Insurance Service in Korea, 67,743 adults with T2D were identified as having been treated with oral glucose-lowering agents between 2008 and 2013. Matching (1:1) was performed for two groups comparing ever-use (cases) and never-use (controls) of DPP-4 inhibitors (n=14,522 in each group). Cox regression analyses were used to assess risk of the following DR events: vitreous haemorrhage; vitrectomy or photocoagulation; intravitreal agent use; and blindness. RESULTS During a median follow-up of 28.4 (14.0-45.2) months, there were 305 (in controls) and 342 (in cases) composite DR events. DPP-4 inhibitor ever-use was not associated with overall risk of composite DR events [adjusted hazard ratio (HR): 1.08, 95% CI: 0.93-1.26] compared with never-use, nor was the risk of each DR outcome increased with DPP-4 inhibitor therapy either. However, DPP-4 inhibitor administration for<12 months was associated with a greater risk of composite DR events (adjusted HR: 1.31, 95% CI: 1.09-1.57) compared with other glucose-lowering agents over the same treatment period. CONCLUSION In comparison to other oral glucose-lowering agents, DPP-4 inhibitor treatment did not increase overall risk of DR. However, DPP-4 inhibitors may be associated with an increased risk of retinopathy events early in the treatment phase.
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Affiliation(s)
- N H Kim
- Division of endocrinology and metabolism, Department of internal medicine, Korea University Anam Hospital, Korea University College of Medicine, 126-1, Anam-dong 5-ga, Seongbuk-gu, 02841 Seoul, Korea
| | - J Choi
- Department of biostatistics, Korea University College of Medicine, Seoul, Korea
| | - N H Kim
- Division of endocrinology and metabolism, Department of internal medicine, Korea University Anam Hospital, Korea University College of Medicine, 126-1, Anam-dong 5-ga, Seongbuk-gu, 02841 Seoul, Korea
| | - K M Choi
- Division of endocrinology and metabolism, Department of internal medicine, Korea University Anam Hospital, Korea University College of Medicine, 126-1, Anam-dong 5-ga, Seongbuk-gu, 02841 Seoul, Korea
| | - S H Baik
- Division of endocrinology and metabolism, Department of internal medicine, Korea University Anam Hospital, Korea University College of Medicine, 126-1, Anam-dong 5-ga, Seongbuk-gu, 02841 Seoul, Korea
| | - J Lee
- Department of biostatistics, Korea University College of Medicine, Seoul, Korea
| | - S G Kim
- Division of endocrinology and metabolism, Department of internal medicine, Korea University Anam Hospital, Korea University College of Medicine, 126-1, Anam-dong 5-ga, Seongbuk-gu, 02841 Seoul, Korea.
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10
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Kim SW, Jun JW, Giri SS, Chi C, Yun S, Kim HJ, Kim SG, Kang JW, Park SC. First report of carp oedema virus infection of koi (Cyprinus carpio haematopterus) in the Republic of Korea. Transbound Emerg Dis 2017; 65:315-320. [PMID: 29226602 DOI: 10.1111/tbed.12782] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [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: 05/11/2017] [Indexed: 11/29/2022]
Abstract
Twenty-five koi (Cyprinus carpio haematopterus) bought from a wholesale fish market in Korea, showed lethargic behaviour and 100% mortality within 20 days. Carp oedema virus (CEV) was detected by PCR in all 25 koi. Results of detailed histopathological and clinical examinations of 17 koi indicated loss of body balance, severe infiltration of inflammatory cells into the inter-lamellar spaces of the gills and vacuolization and inclusion bodies in gill epithelial cells. Sequence analysis of PCR products of these koi showed up to 99% identity to the previously reported sequences, suggesting that the observed mass mortality resulted from koi sleepy disease (KSD) due to CEV infection. To the best of our knowledge, this study is the first report of KSD in the Republic of Korea. Partial sequences of 4a protein from the virus indicated that the present CEV detected in koi from Korea is more closely related to that from the UK and Poland than from Japan. The present findings indicate that the prevalence and spread of KSD must be closely monitored in both European and Asian countries to avoid potential economic losses to the global koi industry.
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Affiliation(s)
- S W Kim
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - J W Jun
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - S S Giri
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - C Chi
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - S Yun
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - H J Kim
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - S G Kim
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - J W Kang
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - S C Park
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
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11
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Jung MJ, Kim HK, Choi SY, Kim SG, Jin SY. Solid pseudopapillary neoplasm of the pancreas with liver metastasis initially misinterpreted as benign haemorrhagic cyst. Malays J Pathol 2017; 39:327-330. [PMID: 29279599] [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: 06/07/2023]
Abstract
Solid pseudopapillary neoplasm (SPN) of the pancreas is considered a low-malignant neoplasm with a good prognosis. However, 5% to 15% of patients with SPNs develop metastatic disease, most commonly in the liver. Metastatic hepatic malignancies that show pseudocystic features are rare. Here we describe the case of a middle-aged female with a cystic liver metastasis from SPN. To the best of our knowledge, SPN with a single cystic liver metastasis has not been described, although these tumours frequently undergo haemorrhagic-cystic degeneration. Thus, in these patients the marked cystic change could be misinterpreted as a benign lesion.
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Affiliation(s)
- M J Jung
- Soonchunhyang University College of Medicine, Department of Pathology, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea.
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Chawla S, Loevner LA, Kim SG, Hwang WT, Wang S, Verma G, Mohan S, LiVolsi V, Quon H, Poptani H. Dynamic Contrast-Enhanced MRI-Derived Intracellular Water Lifetime (τ i ): A Prognostic Marker for Patients with Head and Neck Squamous Cell Carcinomas. AJNR Am J Neuroradiol 2017; 39:138-144. [PMID: 29146716 DOI: 10.3174/ajnr.a5440] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 09/04/2017] [Indexed: 12/29/2022]
Abstract
BACKGROUND AND PURPOSE Shutter-speed model analysis of dynamic contrast-enhanced MR imaging allows estimation of mean intracellular water molecule lifetime (a measure of cellular energy metabolism) and volume transfer constant (a measure of hemodynamics). The purpose of this study was to investigate the prognostic utility of pretreatment mean intracellular water molecule lifetime and volume transfer constant in predicting overall survival in patients with squamous cell carcinomas of the head and neck and to stratify p16-positive patients based upon survival outcome. MATERIALS AND METHODS A cohort of 60 patients underwent dynamic contrast-enhanced MR imaging before treatment. Median, mean intracellular water molecule lifetime and volume transfer constant values from metastatic nodes were computed from each patient. Kaplan-Meier analyses were performed to associate mean intracellular water molecule lifetime and volume transfer constant and their combination with overall survival for the first 2 years, 5 years, and beyond (median duration, >7 years). RESULTS By the last date of observation, 18 patients had died, and median follow-up for surviving patients (n = 42) was 8.32 years. Patients with high mean intracellular water molecule lifetime (4 deaths) had significantly (P = .01) prolonged overall survival by 5 years compared with those with low mean intracellular water molecule lifetime (13 deaths). Similarly, patients with high mean intracellular water molecule lifetime (4 deaths) had significantly (P = .006) longer overall survival at long-term duration than those with low mean intracellular water molecule lifetime (14 deaths). However, volume transfer constant was a significant predictor for only the 5-year follow-up period. There was some evidence (P < .10) to suggest that mean intracellular water molecule lifetime and volume transfer constant were associated with overall survival for the first 2 years. Patients with high mean intracellular water molecule lifetime and high volume transfer constant were associated with significantly (P < .01) longer overall survival compared with other groups for all follow-up periods. In addition, p16-positive patients with high mean intracellular water molecule lifetime and high volume transfer constant demonstrated a trend toward the longest overall survival. CONCLUSIONS A combined analysis of mean intracellular water molecule lifetime and volume transfer constant provided the best model to predict overall survival in patients with squamous cell carcinomas of the head and neck.
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Affiliation(s)
- S Chawla
- From the Departments of Radiology (S.C., L.A.L., S.G.K., S.W., G.V., S.M., H.P.)
| | - L A Loevner
- From the Departments of Radiology (S.C., L.A.L., S.G.K., S.W., G.V., S.M., H.P.)
| | - S G Kim
- From the Departments of Radiology (S.C., L.A.L., S.G.K., S.W., G.V., S.M., H.P.).,Department of Radiology (S.G.K.), New York University, New York, New York
| | - W-T Hwang
- Biostatistics and Epidemiology (W.-T.H.)
| | - S Wang
- From the Departments of Radiology (S.C., L.A.L., S.G.K., S.W., G.V., S.M., H.P.)
| | - G Verma
- From the Departments of Radiology (S.C., L.A.L., S.G.K., S.W., G.V., S.M., H.P.)
| | - S Mohan
- From the Departments of Radiology (S.C., L.A.L., S.G.K., S.W., G.V., S.M., H.P.)
| | - V LiVolsi
- Pathology and Lab Medicine (V.L.), Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - H Quon
- Radiation Oncology (H.Q.).,Department of Radiation Oncology and Molecular Radiation Sciences (H.Q.), Johns Hopkins University, Baltimore, Maryland
| | - H Poptani
- From the Departments of Radiology (S.C., L.A.L., S.G.K., S.W., G.V., S.M., H.P.) .,Department of Cellular and Molecular Physiology (H.P.), University of Liverpool, Liverpool, United Kingdom
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13
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An JH, Kim HY, Kim SG, Dralle H, Randolph GW, Piantanida E, Tanda ML, Dionigi G. Endpoints for screening thyroid cancer in the Republic of Korea: thyroid specialists' perspectives. J Endocrinol Invest 2017; 40:683-685. [PMID: 28008561 DOI: 10.1007/s40618-016-0596-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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: 10/31/2016] [Accepted: 12/05/2016] [Indexed: 01/02/2023]
Abstract
Cancer screening is aimed primarily at reducing deaths from the specific cancer. Thyroid-specific cancer mortality may be the most ambitious endpoint for obtaining estimates of screening effect. Numerous observations have accumulated over the years, indicating that thyroid cancer mortality endpoint has been difficult to study and is confounded by population heterogeneity, provision of randomization, and requirement of large cohorts with sufficiently long follow-up due to the excellent prognosis of the cancer. Accordingly, it may be important to reconsider how to best measure thyroid cancer screening efficacy. Recommendations against thyroid cancer screening should be based upon trials designed to evaluate its effectiveness not only in significant reduction in cancer mortality, but also of other distinct endpoints. It is desirable to evaluate derivative endpoints that can reliably predict reductions in mortality. The term "derivative" means a variable that is related to the true endpoint and is likely to be observable before the primary endpoint. Derivative endpoints may include thyroid cancer incidence, the proportion of early-stage tumors detected, more treatable stage, the identification of small tumors (to maintain in observation), decrease in the number of people who develop metastatic disease, the increased chance of lesser extent surgery, and the application of minimally invasive approaches, as well as no need for lifelong thyroid replacement therapy, a consistent follow-up, low-dose or no RAI administration and risk factor assessments where case findings should be continuous. The Korean guidelines for thyroid cancer national-level screening were published by a relevant group of multidisciplinary thyroid experts. It was concluded that the evidence is insufficient to balance the benefits and harms of thyroid cancer screening. However, the paper seems to raise the necessary investments in future research and demand a complete analysis for derivative endpoints, and offer screening participants with complete information necessary to make decisions that will provide them with the most value when a small thyroid cancer is screen-identified.
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Affiliation(s)
- J H An
- Division of Endocrinology, Department of Internal Medicine, KUMC Thyroid Center, Korea University College of Medicine, Seoul, Korea
| | - H Y Kim
- Department of Surgery, KUMC Thyroid Center, Korea University College of Medicine, Seoul, Korea.
| | - S G Kim
- Division of Endocrinology, Department of Internal Medicine, KUMC Thyroid Center, Korea University College of Medicine, Seoul, Korea.
| | - H Dralle
- Section of Endocrine Surgery, Department of General, Visceraland Vascular Surgery, University Hospital Essen, Essen, Germany
| | - G W Randolph
- Division of Thyroid and Parathyroid Surgery, Harvard Medical School, Boston, MA, USA
| | - E Piantanida
- Division of Endocrinology, Department of Clinical and Experimental Medicine, University of Insubria, Varese, Italy
| | - M L Tanda
- Division of Endocrinology, Department of Clinical and Experimental Medicine, University of Insubria, Varese, Italy
| | - G Dionigi
- 1st Division of General Surgery, Department of Surgical Sciences and Human Morphology, Research Center for Endocrine Surgery, University of Insubria (Varese-Como), via Guicciardini 9, 21100, Varese, Italy
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Kim W, Kim BG, Lee JS, Lee CK, Yeon JE, Chang MS, Kim JH, Kim H, Yi S, Lee J, Cho JY, Kim SG, Lee JH, Kim YJ. Randomised clinical trial: the efficacy and safety of oltipraz, a liver X receptor alpha-inhibitory dithiolethione in patients with non-alcoholic fatty liver disease. Aliment Pharmacol Ther 2017; 45:1073-1083. [PMID: 28225186 DOI: 10.1111/apt.13981] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [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] [Received: 05/19/2016] [Revised: 05/31/2016] [Accepted: 01/22/2017] [Indexed: 12/11/2022]
Abstract
BACKGROUND Oltipraz is a synthetic dithiolethione with an antisteatotic effect by inhibiting the activity of liver X receptor alpha (LXR-α). Recent studies demonstrated the disruptive role of oltipraz on LXR-α-dependent lipogenesis in hepatocytes and a high-fat diet mouse model. AIM To evaluate the efficacy and safety of oltipraz for reducing liver fat in subjects with non-alcoholic fatty liver disease (NAFLD). METHODS We performed a multicentre, double-blind, placebo-controlled, phase II study. Subjects with a liver fat >20% and hypertransaminasemia were randomised to the three groups: placebo (n = 22), 30 mg of oltipraz (n = 22) or 60 mg of oltipraz (n = 24) twice daily for 24 weeks. Changes in the liver fat from baseline to 24 weeks quantified using magnetic resonance spectroscopy were the primary outcome. RESULTS Compared with the placebo group (-3.2 ± 11.1%), absolute changes in the liver fat content increased in a dose-dependent manner: -7.7 ± 7.0% and -13.9 ± 10.7% for the low-dose and high-dose groups (P = 0.13 and P < 0.01). Per cent reduction in the liver fat content was also significantly greater in the high-dose group than in the placebo group (-34.6 ± 29.4% vs. -0.6 ± 62.9%, P = 0.046). Body mass indices (-1.0 ± 0.9% vs. -0.5 ± 1.4%, P = 0.04) significantly decreased in the high-dose group compared to the placebo group. However, absolute changes in insulin resistance, liver enzymes, lipids and cytokines were not significantly different among groups. The incidence of adverse events was comparable among groups. CONCLUSIONS Twenty-four-week oltipraz treatment significantly reduced the liver fat content in patients with NAFLD. Clinicaltrials.gov (NCT01373554).
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Kim YG, Song JB, Choi YH, Yang DG, Kim SG, Lee HG. Investigation on quench initiation and propagation characteristics of GdBCO coil co-wound with a stainless steel tape as turn-to-turn metallic insulation. Rev Sci Instrum 2016; 87:114701. [PMID: 27910603 DOI: 10.1063/1.4966676] [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: 06/06/2023]
Abstract
This paper investigates the quench initiation and propagation characteristics of a metallic insulation (MI) coil by conducting thermal quench tests for a GdBCO single-pancake coil co-wound with a stainless steel tape as the turn-to-turn MI. The test results confirmed that the MI coil exhibited superior thermal and electrical stabilities compared to the conventional coils co-wound with organic insulation material because the operating current could flow along the radial direction due to the existence of a turn-to-turn contact when a local hot spot was generated. The results of the quench test at a heater current (Ih) of 12, 13, and 14 A indicate that the MI coil possesses a self-protecting characteristic resulting from the "current bypass" through the turn-to-turn contact. However, the test coil was not self-protecting at Ih = 15 A because the Joule heat energy generated by the radial current flow was not completely dissipated due to the characteristic resistance of the metallic insulation tape and the non-superconducting materials, including the substrate, stabilizer, and buffer layers within the high-temperature superconductor (HTS) tape. Even though the MI coil possesses superior thermal and electrical stability relative to those of conventional HTS coils co-wound with an organic material as turn-to-turn insulation, it is essential to consider the critical role of the Joule heat energy resulting from the operating current and stored magnetic energy as well as the characteristic resistances in order to further develop self-protective 2G HTS magnets.
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Affiliation(s)
- Y G Kim
- Department of Materials Science and Engineering, Korea University, Anam-dong 5 ga, Seongbuk-gu, Seoul 136-713, South Korea
| | - J B Song
- Department of Materials Science and Engineering, Korea University, Anam-dong 5 ga, Seongbuk-gu, Seoul 136-713, South Korea
| | - Y H Choi
- Department of Materials Science and Engineering, Korea University, Anam-dong 5 ga, Seongbuk-gu, Seoul 136-713, South Korea
| | - D G Yang
- Department of Materials Science and Engineering, Korea University, Anam-dong 5 ga, Seongbuk-gu, Seoul 136-713, South Korea
| | - S G Kim
- Department of Materials Science and Engineering, Korea University, Anam-dong 5 ga, Seongbuk-gu, Seoul 136-713, South Korea
| | - H G Lee
- Department of Materials Science and Engineering, Korea University, Anam-dong 5 ga, Seongbuk-gu, Seoul 136-713, South Korea
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17
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Wang S, Martinez-Lage M, Sakai Y, Chawla S, Kim SG, Alonso-Basanta M, Lustig RA, Brem S, Mohan S, Wolf RL, Desai A, Poptani H. Differentiating Tumor Progression from Pseudoprogression in Patients with Glioblastomas Using Diffusion Tensor Imaging and Dynamic Susceptibility Contrast MRI. AJNR Am J Neuroradiol 2015; 37:28-36. [PMID: 26450533 DOI: 10.3174/ajnr.a4474] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 06/02/2015] [Indexed: 12/31/2022]
Abstract
BACKGROUND AND PURPOSE Early assessment of treatment response is critical in patients with glioblastomas. A combination of DTI and DSC perfusion imaging parameters was evaluated to distinguish glioblastomas with true progression from mixed response and pseudoprogression. MATERIALS AND METHODS Forty-one patients with glioblastomas exhibiting enhancing lesions within 6 months after completion of chemoradiation therapy were retrospectively studied. All patients underwent surgery after MR imaging and were histologically classified as having true progression (>75% tumor), mixed response (25%-75% tumor), or pseudoprogression (<25% tumor). Mean diffusivity, fractional anisotropy, linear anisotropy coefficient, planar anisotropy coefficient, spheric anisotropy coefficient, and maximum relative cerebral blood volume values were measured from the enhancing tissue. A multivariate logistic regression analysis was used to determine the best model for classification of true progression from mixed response or pseudoprogression. RESULTS Significantly elevated maximum relative cerebral blood volume, fractional anisotropy, linear anisotropy coefficient, and planar anisotropy coefficient and decreased spheric anisotropy coefficient were observed in true progression compared with pseudoprogression (P < .05). There were also significant differences in maximum relative cerebral blood volume, fractional anisotropy, planar anisotropy coefficient, and spheric anisotropy coefficient measurements between mixed response and true progression groups. The best model to distinguish true progression from non-true progression (pseudoprogression and mixed) consisted of fractional anisotropy, linear anisotropy coefficient, and maximum relative cerebral blood volume, resulting in an area under the curve of 0.905. This model also differentiated true progression from mixed response with an area under the curve of 0.901. A combination of fractional anisotropy and maximum relative cerebral blood volume differentiated pseudoprogression from nonpseudoprogression (true progression and mixed) with an area under the curve of 0.807. CONCLUSIONS DTI and DSC perfusion imaging can improve accuracy in assessing treatment response and may aid in individualized treatment of patients with glioblastomas.
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Affiliation(s)
- S Wang
- From the Departments of Radiology (S.W., Y.S., S.M., R.L.W., H.P.)
| | - M Martinez-Lage
- Division of Neuroradiology, Pathology and Laboratory Medicine (M.M.-L.)
| | - Y Sakai
- From the Departments of Radiology (S.W., Y.S., S.M., R.L.W., H.P.)
| | - S Chawla
- Department of Radiology (S.C., S.G.K.), Center for Biomedical Imaging, New York University School of Medicine, New York, New York
| | - S G Kim
- Department of Radiology (S.C., S.G.K.), Center for Biomedical Imaging, New York University School of Medicine, New York, New York
| | | | | | | | - S Mohan
- From the Departments of Radiology (S.W., Y.S., S.M., R.L.W., H.P.)
| | - R L Wolf
- From the Departments of Radiology (S.W., Y.S., S.M., R.L.W., H.P.)
| | - A Desai
- Hematology-Oncology (A.D.), Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
| | - H Poptani
- From the Departments of Radiology (S.W., Y.S., S.M., R.L.W., H.P.)
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Zheng Y, Chen M, He L, Marão HF, Sun DM, Zhou J, Kim SG, Song S, Wang SL, Mao JJ. Mesenchymal dental pulp cells attenuate dentin resorption in homeostasis. J Dent Res 2015; 94:821-7. [PMID: 25762594 DOI: 10.1177/0022034515575347] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Dentin in permanent teeth rarely undergoes resorption in development, homeostasis, or aging, in contrast to bone that undergoes periodic resorption/remodeling. The authors hypothesized that cells in the mesenchymal compartment of dental pulp attenuate osteoclastogenesis. Mononucleated and adherent cells from donor-matched rat dental pulp (dental pulp cells [DPCs]) and alveolar bone (alveolar bone cells [ABCs]) were isolated and separately cocultured with primary rat splenocytes. Primary splenocytes readily aggregated and formed osteoclast-like cells in chemically defined osteoclastogenesis medium with 20 ng/mL of macrophage colony-stimulating factor (M-CSF) and 50 ng/mL of receptor activator of nuclear factor κB ligand (RANKL). Strikingly, DPCs attenuated osteoclastogenesis when cocultured with primary splenocytes, whereas ABCs slightly but significantly promoted osteoclastogenesis. DPCs yielded ~20-fold lower RANKL expression but >2-fold higher osteoprotegerin (OPG) expression than donor-matched ABCs, yielding a RANKL/OPG ratio of 41:1 (ABCs:DPCs). Vitamin D3 significantly promoted RANKL expression in ABCs and OPG in DPCs. In vivo, rat maxillary incisors were atraumatically extracted (without any tooth fractures), followed by retrograde pulpectomy to remove DPCs and immediate replantation into the extraction sockets to allow repopulation of the surgically treated root canal with periodontal and alveolar bone-derived cells. After 8 wk, multiple dentin/root resorption lacunae were present in root dentin with robust RANKL and OPG expression. There were areas of dentin resoprtion alternating with areas of osteodentin formation in root dentin surface in the observed 8 wk. These findings suggest that DPCs of the mesenchymal compartment have an innate ability to attenuate osteoclastogenesis and that this innate ability may be responsible for the absence of dentin resorption in homeostasis. Mesenchymal attenuation of dentin resorption may have implications in internal resorption in the root canal, pulp/dentin regeneration, and root resorption in orthodontic tooth movement.
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Affiliation(s)
- Y Zheng
- Center for Craniofacial Regeneration, Columbia University, New York, NY, USA Department of Endodontics, Capital Medical University School of Stomatology, Beijing, China
| | - M Chen
- Center for Craniofacial Regeneration, Columbia University, New York, NY, USA
| | - L He
- Center for Craniofacial Regeneration, Columbia University, New York, NY, USA
| | - H F Marão
- Center for Craniofacial Regeneration, Columbia University, New York, NY, USA
| | - D M Sun
- Department of Neuroscience, Rutgers University, Piscataway, NJ, USA
| | - J Zhou
- Center for Craniofacial Regeneration, Columbia University, New York, NY, USA
| | - S G Kim
- Center for Craniofacial Regeneration, Columbia University, New York, NY, USA
| | - S Song
- Center for Craniofacial Regeneration, Columbia University, New York, NY, USA
| | - S L Wang
- Department of Endodontics, Capital Medical University School of Stomatology, Beijing, China
| | - J J Mao
- Center for Craniofacial Regeneration, Columbia University, New York, NY, USA
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Whalley D, Crawford SR, Laramée P, Higuchi S, Hao W, Kim SG, Luquiens A, Aubin HJ. Cultural Adaptation of the Alcohol Quality of Life Scale for Use in Japan, China, and Korea. Value Health 2014; 17:A462. [PMID: 27201299 DOI: 10.1016/j.jval.2014.08.1282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- D Whalley
- RTI Health Solutions, Manchester, UK
| | | | - P Laramée
- Lundbeck S. A. S., Issy-les-Moulineaux cedex, France
| | - S Higuchi
- National Hospital Organization Kurihama Medical and Addiction Center, Yokosuka, Japan
| | - W Hao
- Second Xiangya Hospital of Central South University, Changsha, China
| | - S G Kim
- Pusan National University, Yangsan, South Korea
| | - A Luquiens
- Hôpital Paul Brousse, INSERM 669, Université Paris-Sud, Villejuif, France
| | - H J Aubin
- Hôpital Paul Brousse, INSERM 669, Université Paris-Sud, Villejuif, France
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Kim SG, Lee DS, Lee S, Jang JH. Osteocalcin/fibronectin-functionalized collagen matrices for bone tissue engineering. J Biomed Mater Res A 2014; 103:2133-40. [PMID: 25346429 DOI: 10.1002/jbm.a.35351] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 09/29/2014] [Accepted: 10/09/2014] [Indexed: 02/04/2023]
Abstract
Collagen is the most abundant protein found in the extracellular matrix and is widely used to build scaffolds for biomedical applications which are the result of its biocompatibility and biodegradability. In the present study, we constructed a rhOCN/FNIII9-10 fusion protein and rhOCN/FNIII9-10-functionalized collagen matrices and investigated the potential value for bone tissue engineering. In vitro studies carried out with preosteoblastic MC3T3-E1 cells showed that rhOCN/FNIII9-10 fusion protein promoted cell adhesion and the mRNA levels of osteogenic markers including osteocalcin, runt-related transcription factor 2, alkaline phosphatase (ALP), and collagen type I. In addition, rhOCN/FNIII9-10-functionalized collagen matrices showed significant induction of the ALP activity more than rhFNIII9-10-functionalized collagen matrices or collagen matrices alone. These results suggested that rhOCN/FNIII9-10-functionalized collagen matrices have potential for bone tissue engineering.
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Affiliation(s)
- S G Kim
- Department of Biochemistry, Inha University School of Medicine, Incheon, 400-712, Republic of Korea
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Kim SG, Kim DS, Choe MS, Lee W, So J, Choi EM. Cold testing of quasi-optical mode converters using a generator for non-rotating high-order gyrotron modes. Rev Sci Instrum 2014; 85:104709. [PMID: 25362436 DOI: 10.1063/1.4898180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this paper, we test the performance of a quasi-optical, internal-gyrotron mode converter. When cold testing mode converters, a rotating higher-order mode is commonly used. However, this requires a nontrivial design and precise alignment. We thus propose a new technique for testing gyrotron mode converters by using a simple, non-rotating, higher-order mode generator. We demonstrate the feasibility of this technique for a W-band gyrotron quasi-optical mode converter by examining the excitation of a TE6,2 mode from a non-rotating mode generator. Our results demonstrate that this new cold-test scheme is an easy and efficient method for verifying the performance of quasi-optical mode converters.
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Affiliation(s)
- S G Kim
- School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, South Korea
| | - D S Kim
- Physics Department, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, South Korea
| | - M S Choe
- Physics Department, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, South Korea
| | - W Lee
- Agency for Defense Development (ADD), Daejeon 305-152, South Korea
| | - J So
- Agency for Defense Development (ADD), Daejeon 305-152, South Korea
| | - E M Choi
- School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, South Korea
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Jang JY, Kim TY, Sohn JH, Lee TH, Jeong SW, Park EJ, Lee SH, Kim SG, Kim YS, Kim HS, Kim BS. Relative adrenal insufficiency in chronic liver disease: its prevalence and effects on long-term mortality. Aliment Pharmacol Ther 2014; 40:819-26. [PMID: 25078874 DOI: 10.1111/apt.12891] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [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] [Received: 04/07/2014] [Revised: 04/29/2014] [Accepted: 07/07/2014] [Indexed: 12/12/2022]
Abstract
BACKGROUND The relationship between relative adrenal insufficiency (RAI) and chronic liver disease is unclear. AIM To determine the frequency with which RAI is observed in noncritically ill patients at various stages of chronic liver disease, and the correlation between RAI and disease severity and long-term mortality. METHODS In total, 71 non-critically ill patients with liver cirrhosis (n = 54) and chronic hepatitis (n = 17) were evaluated prospectively. A short stimulation test (SST) with 250 μg of corticotrophin was performed to detect RAI. RAI was defined as an increase in serum cortisol of <9 μg/dL in patients with a basal total cortisol of <35 μg/dL. RESULTS RAI was observed in only 13 (24.1%) of 54 patients with cirrhosis. Compared to those without RAI, cirrhotic patients with RAI had significantly higher Child-Turcotte-Pugh score (10.3 ± 1.7 vs. 7.1 ± 1.8, mean ± s.d., P < 0.001) and Model for End-Stage Liver Disease score (14.5 ± 6.6 vs. 9.4 ± 3.7, P = 0.017). The cortisol response to corticotropin was negatively correlated with the severity of cirrhosis (P < 0.05). In addition, the mortality rate was higher in cirrhotic patients with RAI (69.2%) than in those without RAI (4.9%; P < 0.001) during the follow-up period of 20.1 ± 13.5 months (range, 5.8-51.1 months). The cumulative 1-year survival rates in cirrhotic patients with and without RAI were 69.2% and 95.0%, respectively (P = 0.05), while the corresponding cumulative 3-year survival rates were 0% and 95.0% (P < 0.001). CONCLUSIONS Relative adrenal insufficiency is more commonly observed in those with severe cirrhosis, and is clearly associated with more advanced liver disease and a shortened long-term survival. This suggests that relative adrenal insufficiency is an independent prognostic factor in non-critically ill patients with cirrhosis.
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Affiliation(s)
- J Y Jang
- Division of Gastroenterology, Department of Internal Medicine, Digestive Disease Center, Institute for Digestive Research, College of Medicine, Soonchunhyang University, Seoul, South Korea
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Joo MS, Lee CG, Koo JH, Kim SG. miR-125b transcriptionally increased by Nrf2 inhibits AhR repressor, which protects kidney from cisplatin-induced injury. Cell Death Dis 2013; 4:e899. [PMID: 24176857 PMCID: PMC3920955 DOI: 10.1038/cddis.2013.427] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [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: 08/22/2013] [Revised: 09/25/2013] [Accepted: 09/26/2013] [Indexed: 01/04/2023]
Abstract
MicroRNAs (miRNAs) have a role in the cellular defense mechanism. Nuclear factor erythroid-2-related factor 2 (Nrf2) increases antioxidant enzyme capacity. However, miRNA transcriptionally controlled by Nrf2 had been uncharacterized. Here we report that miR-125b is transactivated by Nrf2 and inhibits aryl hydrocarbon receptor (AhR) repressor (AhRR). Bioinformatic approaches enabled us to extract six candidate miRNAs. Of them, only miR-125b was increased in the kidney of mice treated with oltipraz. Nrf2 overexpression enhanced primary, precursor and mature miR-125b levels. Functional assays revealed MIR125B1 is a bona fide target gene of Nrf2. Oltipraz treatment protected the kidney from cisplatin toxicity with increase of miR-125b. Consistently, Nrf2 knockout abrogated an adaptive increase of miR-125b elicited by cisplatin, augmenting kidney injury. An integrative network of miRNA and messenger RNA changes enabled us to predict miR-125b as an inhibitor of AhRR for the control of AhR activity and cell survival. In our molecular study, miR-125b inhibited AhRR and thereby activated AhR, leading to the induction of mdm2. Consistently, p53 activation by cisplatin was diminished by either miR-125b or oltipraz treatment. The results of experiments using miR-125b mimic or small interfering RNA of AhRR verified the role of miR-125b in AhRR regulation for kidney protection. In conclusion, miR-125b is transcriptionally activated by Nrf2 and serves as an inhibitor of AhRR, which contributes to protecting kidney from acute injury.
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Affiliation(s)
- M S Joo
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, Korea
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Yu JH, Shin MS, Kim DJ, Lee JR, Yoon SY, Kim SG, Koh EH, Lee WJ, Park JY, Kim MS. Enhanced carbohydrate craving in patients with poorly controlled Type 2 diabetes mellitus. Diabet Med 2013; 30:1080-6. [PMID: 23586900 DOI: 10.1111/dme.12209] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/10/2013] [Indexed: 11/27/2022]
Abstract
AIMS Although hyperphagia is a common manifestation of diabetes mellitus, data on food craving in patients with diabetes are limited. This study compared food craving in patients with Type 2 diabetes mellitus and a control group without diabetes. METHODS A total of 210 subjects (105 with Type 2 diabetes and 105 age-, sex- and BMI-matched control subjects) participated in two food craving surveys. The surveys were as follows: the General Food Cravings Questionnaire--Trait, which assesses the general trait of food craving; and the Food Cravings Questionnaire--State, which assesses the state of food craving or current desire for high-carbohydrate or high-fat foods in response to pictures of food. Follow-up Food Cravings Questionnaire--State surveys were administered approximately 3 months later to the subjects with diabetes. Survey results were analysed to assess relationships between food craving and glycaemic control. RESULTS The General Food Cravings Questionnaire--Trait scores in the group with Type 2 diabetes and the control group were not significantly different. The group with Type 2 diabetes had higher carbohydrate craving scores, but lower fat craving scores, than the control group. Carbohydrate craving scores in subjects with diabetes were positively correlated with HbA(1c). In follow-up surveys, carbohydrate craving scores declined in patients with improved glycaemic control. CONCLUSIONS The surveys showed that patients with Type 2 diabetes had higher carbohydrate cravings and lower fat cravings than the age-, sex- and BMI-matched control group. Carbohydrate craving in patients with diabetes was associated with poor glycaemic control.
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Affiliation(s)
- J H Yu
- Division of Endocrinology and Metabolism, Department of Internal Medicine, University of Ulsan College of Medicine, Seoul, Korea
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Baek SM, Choi SM, Seo HJ, Kim SG, Jung JH, Lee M, Park JH, Moon SJ, Lee S. Corrigendum to "Use of complementary and alternative medicine by self- or non-institutional therapists in South Korea: a community-based survey" [Integr. Med. Res. 2(1) (2013), 25-31]. Integr Med Res 2013; 2:79. [PMID: 28671192 PMCID: PMC5481668 DOI: 10.1016/j.imr.2013.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
| | - Sun Mi Choi
- Acupuncture, Moxibustion, and Meridian Research Group, Medical Research Division, Korea Institute of Oriental Medicine, Daejeon, Korea
| | - Hyun-Ju Seo
- Department of Nursing, College of Medicine, Chosun University, Gwangju, Korea
| | - Sul Gi Kim
- Department of Acupuncture and Moxibustion, College of Oriental Medicine, Wonkwang University, Iksan, Jeonbuk, Korea
| | - Ji-Hoon Jung
- Department of Information and Statistics, Natural Sciences, Chungnam National University, Daejeon, Korea
| | - Minhee Lee
- Acupuncture, Moxibustion, and Meridian Research Group, Medical Research Division, Korea Institute of Oriental Medicine, Daejeon, Korea
| | - Jeong Hwan Park
- Acupuncture, Moxibustion, and Meridian Research Group, Medical Research Division, Korea Institute of Oriental Medicine, Daejeon, Korea
| | - Su Jeong Moon
- Acupuncture, Moxibustion, and Meridian Research Group, Medical Research Division, Korea Institute of Oriental Medicine, Daejeon, Korea
| | - Sanghun Lee
- Acupuncture, Moxibustion, and Meridian Research Group, Medical Research Division, Korea Institute of Oriental Medicine, Daejeon, Korea
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Seo HJ, Baek SM, Kim SG, Kim TH, Choi SM. Prevalence of complementary and alternative medicine use in a community-based population in South Korea: a systematic review. Complement Ther Med 2013; 21:260-71. [PMID: 23642959 DOI: 10.1016/j.ctim.2013.03.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Revised: 12/26/2012] [Accepted: 03/03/2013] [Indexed: 10/27/2022] Open
Abstract
OBJECTIVES To examine the prevalence of the use of complementary and alternative medicine (CAM) in the Republic of Korea and identify the factors responsible for variations in the reported prevalence, the socio-demographic factors associated with CAM use, and the relationship between CAM use and study methodological quality. DESIGN Two international and 6 representative Korean medical databases were searched to identify cross-sectional studies that had surveyed the general Korean population in community settings to determine prevalence of CAM use. Data collection and assessment of the methodological quality of the studies were conducted by 3 independent reviewers. RESULTS The prevalence of CAM use reported by the 11 studies that met the selection criteria ranged from 29% to 83%. Inclusion of Korean medicine within the definition of CAM was not found to be a significant factor in the heterogeneity, but several factors that may have contributed to it, namely, inconsistency in CAM taxonomies, recall bias, use of unrepresentative sampling strategies, and lack of pilot testing, were identified. Higher CAM use was found to be associated with female sex, high level of education, and advanced age. CONCLUSIONS The inclusion of Korean medicine within the definition of CAM does not explain the heterogeneity in the reported prevalence of CAM use among the South Korean population. A standard questionnaire appropriate for the Korean context should be developed to define and classify the common CAM modalities and control for confounding factors.
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Affiliation(s)
- Hyun-Ju Seo
- Department of Nursing, College of Medicine, Chosun University, Gwangju, Republic of Korea
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Baek SM, Choi SM, Seo HJ, Kim SG, Jung JH, Lee M, Park JH, Moon SJ, Lee S. Use of complementary and alternative medicine by self- or non-institutional therapists in South Korea: a community-based survey. Integr Med Res 2013; 2:25-31. [PMID: 28664050 PMCID: PMC5481671 DOI: 10.1016/j.imr.2013.02.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Revised: 01/29/2013] [Accepted: 01/29/2013] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND The purpose of this study is to investigate the prevalence and utilization pattern of complementary and alternative medicine (CAM) administered by oneself or by non-institutional practitioners in a general population in South Korea. METHODS Nationwide, face-to-face surveys were conducted from September 1, 2011 to October 5, 2011. We conveniently selected the participants by using a proportional allocation method according to age, gender, and region. The use of CAM in the last year, the patterns of use, sources of information, and counseling objects were investigated in addition to respondents' demographic characteristics. RESULTS Among the 1284 people approached, 915 respondents (71.3%) reported having had at least one CAM therapy during the past 12 months. Natural products were used the most frequently (58.8%). Unexpectedly, 82.6% out of 1740 therapies reported were self-administered CAM. Healthcare professionals were the source of information on CAM in only 5.6% of all instances of use, and only 17.7% of participants had consulted with doctors regarding CAM use. CONCLUSIONS Owing to the widespread use of CAM in South Korea, researchers should focus on the safety and potential effectiveness of CAM therapy when self-administered by users or by unauthorized CAM practitioners.
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Affiliation(s)
| | - Sun Mi Choi
- Department of Nursing, College of Medicine, Chosun University, Gwangju, Korea
| | - Hyun-Ju Seo
- Department of Nursing, College of Medicine, Chosun University, Gwangju, Korea
| | - Sul Gi Kim
- Department of Acupuncture and Moxibustion, College of Oriental Medicine, Wonkwang University, Iksan, Jeonbuk, Korea
| | - Ji-Hoon Jung
- Department of Information and Statistics, Natural Sciences, Chungnam National University, Deajeon, Korea
| | - Minhee Lee
- Acupuncture, Moxibustion, and Meridian Research Group, Medical Research Division, Korean Institute of Oriental Medicine, Daejeon, Korea
| | - Jeong Hwan Park
- Acupuncture, Moxibustion, and Meridian Research Group, Medical Research Division, Korean Institute of Oriental Medicine, Daejeon, Korea
| | - Su Jeong Moon
- Acupuncture, Moxibustion, and Meridian Research Group, Medical Research Division, Korean Institute of Oriental Medicine, Daejeon, Korea
| | - Sanghun Lee
- Acupuncture, Moxibustion, and Meridian Research Group, Medical Research Division, Korean Institute of Oriental Medicine, Daejeon, Korea
- Corresponding author. Acupuncture, Moxibustion, and Meridian Research Group, Medical Research Division, Korea Institute of Oriental Medicine, 1672 Yuseongdae-ro, Yuseong-gu, Daejeon, 305-811, Korea
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Yoo WJ, Shin SH, Han KT, Jeon D, Hong S, Kim SG, Sim HI, Jang KW, Cho S, Park BG, Lee B. Feasibility study on development of Cerenkov fiber-optic dosimeter for radiotherapy application. Annu Int Conf IEEE Eng Med Biol Soc 2013; 2013:485-487. [PMID: 24109729 DOI: 10.1109/embc.2013.6609542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
To obtain real-time dose information in photon-beam therapy using a clinical linear accelerator, we fabricated a novel Cerenkov fiber-optic dosimeter using two plastic optical fibers without employing a scintillator. In this study, the light intensity and spectrum of Cerenkov radiation induced by a high-energy photon beam were measured as functions of the irradiation angle and the length difference between the two plastic optical fibers in the dosimeter probe. Also, we obtained a percentage depth dose curve for a 6 MV photon beam with a field size of 10 × 10 cm(2) according to the depth of the solid water phantom. Based on the results of this study, it is anticipated that the proposed Cerenkov fiber-optic dosimeter can be developed as a useful dosimeter to accurately obtain dose information prior to conducting radiotherapy.
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Koo BS, Jung BJ, Kim SG, Liang ZL, Yeong MK, Rha KS. Altered expression of E-cadherin and β-catenin in malignant transformation of sinonasal inverted papillomas. Rhinology 2012; 49:479-85. [PMID: 21991576 DOI: 10.4193/rhino10.214] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND E-cadherin and &#946;-catenin are molecules that mediate cell-cell adhesion in normal epithelium. Aberrant expression of these adhesion molecules results in the loss of intercellular adhesion, with possible cell transformation and tumour progression. We determined the role of E-cadherin and &#946;-catenin in the pathogenesis of sinonasal inverted papilloma (IP) and its malignant transformation. METHODS We determined the expression of E-cadherin and &#946;-catenin by immunohistochemistry in paraffin-embedded tissue of 21 subjects with nasal polyps, 56 with IPs, 7 IPs with dysplasia and 18 IPs with squamous cell carcinoma (SCC). The clinicopathological variables of the IPs with SCC correlated with the degree of expression of E-cadherin and &#946;-catenin. RESULTS The degree of expression of E-cadherin and &#946;-catenin in the cell membrane was significantly lower in IPs with SCC than in nasal polyps and IPs. The degree of expression of &#946;-catenin was significantly lower in IPs with SCC with a malignant proportion > 50% compared to a malignant proportion &#8804; 50%. However, there was no significant association between the degree of expression of E-cadherin and &#946;-catenin and clinicopathological variables, such as age, gender, T stage, tumour differentiation, or SCC type (metachronous vs. synchronous). In addition, there was no significant relationship between recurrence or survival rate in IPs with SCC and the degree of expression of E-cadherin or &#946;-catenin in the cell membrane or nuclear &#946;-catenin. CONCLUSION Decreased expression of E-cadherin and &#946;-catenin in the cell membrane may be associated with carcinogenesis of IPs and help predict malignant transformation in sinonasal IPs.
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Affiliation(s)
- B S Koo
- Department of Otolaryngology-Head and Neck Surgery, Chungnam National University College of Medicine, Daejeon, Korea
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Lee JK, Kang HW, Kim SG, Kim JS, Jung HC. Risks related with withholding and resuming anticoagulation in patients with non-variceal upper gastrointestinal bleeding while on warfarin therapy. Int J Clin Pract 2012; 66:64-8. [PMID: 22171905 DOI: 10.1111/j.1742-1241.2011.02827.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND The use of warfarin is growing for the prevention or treatment of cardiovascular or cerebrovascular diseases. The risk of haemorrhagic side effects is increased in patients taking warfarin. AIMS To evaluate risks related with withholding and resuming anticoagulation in patients with upper gastrointestinal bleeding (UGIB) while on warfarin therapy and the role of the second-look endoscopic examination (SEE). METHODS Records of 58 patients with native valvular heart diseases who presented with non-variceal UGIB during chronic anticoagulation with warfarin were retrospectively reviewed. Age- and gender-matched patients with non-variceal UGIB during aspirin therapy because of ischaemic heart disease were recruited as the control group. RESULTS Development of both recurrent bleeding and thromboembolic events were more frequent in warfarin group than in control group (7.0% vs. 0% with p = 0.03 and 16.7% vs. 2.4% with p < 0.01, respectively). One of four cases of recurrent bleeding in warfarin group was found by SEE performed in an asymptomatic patient. There were six thromboembolic events which occurred on the 21st, 27th, 28th, 31st, 58th and 75th day from the presentation out of 36 patients who ceased anticoagulation. In contrast, only one from 41 in whom aspirin was discontinued experienced myocardial infarction. There was no difference in the failure of endoscopic haemostasis necessitating angiographic embolisation or surgery, hospital stay, the need of transfusion and overall mortality. CONCLUSIONS Anticoagulation is recommended to be resumed before the 20th day from the cessation to prevent thromboembolic events. A routine SEE before resuming anticoagulation might be helpful to detect asymptomatic recurrent bleeding.
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Affiliation(s)
- J K Lee
- Department of Internal Medicine, Graduate School of Medicine, Dongguk University Ilsan Hospital, Dongguk University, Seoul, Korea
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Yang SJ, Hwang SY, Choi HY, Yoo HJ, Seo JA, Kim SG, Kim NH, Baik SH, Choi DS, Choi KM. Serum selenoprotein P levels in patients with type 2 diabetes and prediabetes: implications for insulin resistance, inflammation, and atherosclerosis. J Clin Endocrinol Metab 2011; 96:E1325-9. [PMID: 21677040 DOI: 10.1210/jc.2011-0620] [Citation(s) in RCA: 135] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT AND OBJECTIVE The dysregulation of hepatokines may be associated with the pathogenesis of insulin resistance and type 2 diabetes. A recent study has suggested that selenoprotein P (SeP), a novel hepatokine, may play a role in the regulation of glucose metabolism and insulin sensitivity. We examined the relationship between circulating SeP levels and clinical parameters associated with insulin resistance in humans. PARTICIPANTS AND METHODS We compared serum SeP concentrations in 100 subjects with diverse glucose tolerance statuses. Furthermore, we evaluated the relationship between SeP and cardiometabolic risk factors including insulin resistance, high-sensitivity C-reactive protein, and carotid intima-media thickness. RESULTS Serum SeP concentrations were significantly higher in patients with type 2 diabetes or prediabetes than those with normal glucose tolerance (all P < 0.01) and decreased in a stepwise manner [1032.4 (495.9-2149.4) vs. 867.3 (516.3-1582.7) vs. 362.0 (252.5-694.5), P = 0.004]. In addition, overweight and obese subjects had significantly increased SeP levels compared with lean subjects (P = 0.002). Spearman's partial correlation analysis adjusted for age and gender showed a significant relationship between SeP and cardiometabolic factors including body mass index, waist circumference, systolic blood pressure, triglycerides, glucose, hemoglobin A1c, aspartate aminotransferase, and insulin resistance. Furthermore, in multiple regression analyses, SeP showed an independent association with carotid intima-media thickness as well as high-sensitivity C-reactive protein, even after adjustment for other confounding factors. CONCLUSIONS Circulating SeP concentrations were elevated in patients with glucose metabolism dysregulation and were related to various cardiometabolic parameters including insulin resistance, inflammation, and atherosclerosis.
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Affiliation(s)
- S J Yang
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Korea University Guro Hospital, Seoul 152-050, Korea
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Kim SW, Kim SG. Prospects of DLC coating as environment friendly surface treatment process. J Environ Sci (China) 2011; 23 Suppl:S8-S13. [PMID: 25084601 DOI: 10.1016/s1001-0742(11)61068-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
After first commercialization in 90's, the applications of diamond-like carbon (DLC) have been significantly expanded to tool, automobile parts, machineries and moulds to enhance wear and friction properties. Although DLC has many advantages like high hardness, low friction electrical insulating and chemical stability and has the possible market, its application in the field is still very limited due to the gaps of understanding between end-user and developer of its advantage of costing. Recently, one of the most popular issues in the surface modification is providing the long lasting super-hydrophilic or -hydrophobic properties on the material surface for the outdoor usage. A lot of material loss is caused due to water corrosion which has to do with the flow and contacts of water like fuel cell separator and air conditioner parts. The consequence of development of functional surface based on the hydrophilic or hydrophobic design for the important parts would be really helpful for materials to be cleaner and more energy effective. Here, we first reviewed the DLC technology and then examined the kind of surface modification as well as its merits and disadvantage. We also looked at how we can improve super-hydrophilic and super hydrophobic for the DLC coating layer as well as current status of technology and arts of DLC. In the end, we would like to suggest it as one of the environmental friendly industrial technology.
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Affiliation(s)
- S W Kim
- Surface Technology & Heat Treatment R&D Department, Korea Institute of Industrial Technology 7-47, Songdo-Dong, Yeonsu-Gu, Incheon, 406-840, Korea
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Cho MS, Choi WH, Kim SG, Kim IH, Lee Y. A low sintering temperature and electrical performance of nanoparticle copper ink for use in ink-jet printing. J Nanosci Nanotechnol 2010; 10:6888-6891. [PMID: 21137818 DOI: 10.1166/jnn.2010.2977] [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: 05/30/2023]
Abstract
Copper nanoparticles were successfully synthesized from copper chloride with various capping agents. The formation of copper nanoparticles was controlled by varying the species and concentration of the capping agents. The Cu nanoparticles were easily re-dispersed into n-tetradecane, and Cu films were prepared by solution deposition. The thin Cu films form a highly conducting film at low temperature via sintering due to the high surface area to volume ratio. The films were thermally treated at a range of temperatures and then their morphology and resistivity were analyzed. When the Cu films were sintered at 200 degrees C, their electrical resistivity was about 40 microomega. cm.
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Affiliation(s)
- M S Cho
- Department of Chemistry Engineering, Sungkyunkwan University, Suwon 440-746, Korea
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Choi J, Kim SG, Im JP, Kim JS, Jung HC, Song IS. Comparison of endoscopic ultrasonography and conventional endoscopy for prediction of depth of tumor invasion in early gastric cancer. Endoscopy 2010; 42:705-13. [PMID: 20652857 DOI: 10.1055/s-0030-1255617] [Citation(s) in RCA: 159] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND STUDY AIMS This study aimed to compare the diagnostic accuracy of endoscopic ultrasonography (EUS) with that of conventional endoscopy for staging depth of invasion (T staging) in early gastric cancer. PATIENTS AND METHODS A total of 955 patients with suspected early gastric cancer were prospectively registered. EUS staging was carried out prospectively by a single endoscopist using either miniprobe or radial EUS depending on the endoscopic appearance of the tumor. Conventional endoscopy staging was performed retrospectively by consensus between two endoscopists who were blinded to the EUS staging. Conventional endoscopy staging was conducted on the basis of endoscopic features such as surface nodularity and fold convergence. Patients underwent either surgical (n = 586) or endoscopic resection (n = 369) with curative intent. The staging accuracy of each test was compared with the pathological staging of the resected specimen. RESULTS The presence of a T1m tumor was histologically confirmed in 644 cases (67.4 %) and that of a T1sm tumor in 311 cases (32.6 %). The overall accuracy of EUS staging was 67.4 % (644 / 955) and that of conventional endoscopy staging was 73.7 % (704 / 955) ( P < 0.001). The accuracy of miniprobe EUS was significantly higher than that of radial EUS (79.5 % vs. 59.6 %, P < 0.001), but did not differ significantly from that of conventional endoscopy (79.0 %). CONCLUSIONS EUS does not substantially impact on pretreatment T staging of patients with early gastric cancer compared with conventional endoscopy. Therefore, EUS may not be necessary routinely, and conventional endoscopy may be sufficient for determining the optimal therapeutic strategy, especially in relation to endoscopic resection for early gastric cancer.
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Affiliation(s)
- J Choi
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, South Korea
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Kim SG, Chun JM, Jin R, Kim JY, Won DI, Hwang YJ. Living donor liver transplantation for acute hepatic failure caused by reactivation of hepatitis B virus infection after chemotherapy for hematologic malignancy: case reports. Transplant Proc 2010; 42:843-5. [PMID: 20430187 DOI: 10.1016/j.transproceed.2010.02.038] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Cancer chemotherapy in chronic hepatitis B virus (HBV) carriers occasionally leads to acute hepatic failure (AHF) from viral reactivation resulting in an high mortality rate. In this situation, living donor liver transplantation (LDLT) can be life saving. Herein we have reported 2 cases of successful LDLT performed for AHF caused by reactivation of HBV infection during chemotherapy for hematologic malignancies. In case 1, a 38-year-old male HBV carrier with a neck mass was hisopathologically diagnosed as Hodgkin's lymphoma. During 4 cycles of chemotherapy he developed right upper quadrant pain and jaundice. Laboratory data (alanine amino transferase, 701 U/L, total bilirubin: 7.92 mg/dL, positive hepatitis B e antigen showed that he had experienced an acute exacerbation of chronic hepatitis. Soon, he developed grade IV hepatic encephalopathy with a total bilirubin level of 50.56 mg/dL and a model for End-Stage Liver Disease score of 40. After LDLT, he has been free of relapse for 52 months so far. In case 2, a 49-year-old male HBV carrier was diagnosed in the chronic phase of chronic myeloid leukemia. The patient had been under Imatinib treatment for 1 year until he was admitted for AHF. He developed grade II encephalopathy with a total bilirubin of 50.8 mg/dL. We performed LDLT; the patient has been free of relapse for 17 months. LDLT was a life-saving procedure for AHF caused by reactivation of HBV during chemotherapy for hematologic malignancy. It can provide long-term survival if the coexistent hematologic malignancy has been controlled.
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Affiliation(s)
- S G Kim
- Department of Surgery, Division of Hepato-Biliary Pancreas and Liver Transplantation, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
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Mok MC, Kim SG, Armstrong DJ, Mok DW. Induction of cytokinin autonomy by N,N'-diphenylurea in tissue cultures of Phaseolus lunatus L. Proc Natl Acad Sci U S A 2010; 76:3880-4. [PMID: 16592694 PMCID: PMC383939 DOI: 10.1073/pnas.76.8.3880] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The ability of N,N'-diphenylurea (Ph(2)urea) to substitute for cytokinin-active adenine derivatives in promoting callus growth of Phaseolus lunatus has been examined. In general, Ph(2)urea stimulated callus growth at high concentrations, although the growth of most callus tissues was irregular. Variability in the sensitivity and uniformity of the growth response to Ph(2)urea was found among different genotypes of P. lunatus. Most importantly, tissues cultured on Ph(2)urea-containing medium for one passage had acquired the ability to proliferate in subsequent passages in the absence of either Ph(2)urea or cytokinin-active adenine derivatives. Corresponding tissues maintained on kinetin-containing medium remained cytokinin-dependent. It appears that the effect of Ph(2)urea in promoting the growth of P. lunatus callus tissue resides in its ability to induce cytokinin autonomy. This result suggests that the cytokinin activity of Ph(2)urea may be due to promotion of endogenous cytokinin biosynthesis in the bioassay systems in which it is active.
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Affiliation(s)
- M C Mok
- Department of Horticulture and Genetics Program, Oregon State University, Corvallis, Oregon 97331
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Mok MC, Mok DW, Armstrong DJ, Rabakoarihanta A, Kim SG. Cytokinin autonomy in tissue cultures of phaseolus: a genotype-specific and heritable trait. Genetics 2010; 94:675-86. [PMID: 17249014 PMCID: PMC1214167 DOI: 10.1093/genetics/94.3.675] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Intra- and interspecific differences in cytokinin requirement were detected in callus cultures of Phaseolus vulgaris L. and P. lunatus L. Of the ten genotypes of P. vulgaris tested in the present study, one required cytokinin for callus growth, six exhibited some to moderate growth on cytokinin-free medium, and the remaining three grew uniformly in the absence of cytokinin. In contrast, six of the P. lunatus genotypes were strictly cytokinin-dependent, while four genotypes displayed irregular amount of callus growth on cytokinin-free medium. The genotype-specific behavior of Phaseolus callus tissues was independent of the tissue of origin and the time in culture. The inheritance of the cytokinin requirement of Phaseolus tissue cultures was studied in hybrid tissues resulting from crosses between a strictly cytokinin-dependent genotype (P.I. 200960) and two independent genotypes (cv. G 50 and P.I. 286303) of P. vulgaris. Fresh weights of hybrid tissues on cytokinin-free medium were intermediate between and significantly different from the parental tissues. No differences were found between reciprocal hybrids. These results suggest that cytokinin autonomy in tissue cultures of P. vulgaris is a genetic trait under nuclear control. Both parental and intermediate phenotypes were recovered in the F(2) progeny. The frequency distribution of cytokinin-dependent progeny in F(2) and backcross populations indicates that the cytokinin requirement of P. vulgaris callus tissue may be regulated by one set of alleles.
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Affiliation(s)
- M C Mok
- Department of Horticulture, Genetics Program and Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon 97331
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Abstract
Resistance to a broad class of isometric bacteriophages that infect strains of Lactococcus lactis has been engineered into a dairy starter by expression of antisense mRNA targeted against a conserved bacteriophage gene. Maximum protection is obtained only when the entire 1,654-bp coding sequence for a 51-kDa protein is positioned in the antisense orientation with respect to a promoter sequence that functions in L. lactis subsp. lactis. Expression of the antisense mRNA results in more than 99% reduction of the total number of PFU. Plaques that do form are characterized by their relatively small size and irregular shape. A variety of truncated genes, including the open reading frame expressed in the sense orientation, fail to provide any significant measure of resistance as compared with that of the intact open reading frame. Southern hybridization with probes specific for the conserved region reveal that the [ill] plasmid constructs are maintained despite the presence of a large complement of other indigenous plasmids. Strains harboring the antisense mRNA plasmid construct grow and produce acid at a rate equivalent to that of the host strain alone, suggesting that antisense expression is not deleterious to normal cellular metabolism.
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Affiliation(s)
- S G Kim
- Department of Food Science, Cornell University, Ithaca, New York 14853
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Flament D, Ellermann JM, Kim SG, Ugurbil K, Ebner TJ. Functional magnetic resonance imaging of cerebellar activation during the learning of a visuomotor dissociation task. Hum Brain Mapp 2010; 4:210-26. [PMID: 20408199 DOI: 10.1002/hbm.460040302] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
We have used functional magnetic resonance imaging (fMRI) to study the changes in cerebellar activation that occur during the acquisition of motor skill in human subjects presented with a new task. The standard paradigm consisted of a center-out movement in which subjects used a joystick to superimposed a cursor onto viusual targets. Two variations of this paradigm were introduced: (1) a learning paradigm, where the relationship between movement of the joystick and cursor was reversed, requiring the learning of a visuomotor transformation to optimize performance and (2) a random paradigm, where the joystick/cursor relationship was changed randomly for each trial. Activation in the cerebellum was highest during the random paradigm and during the early stages of the learning paradigm. In the early stages of learning and during the random paradigm performance was poor with a decrease in the number of completed movements, and an increase in the time and length of movements. With repeated practice at the learning paradigm performance improbed and reached the same level of proficiency as in the standard task. Commensurate with the improbement in performance was a decrease in cerebellar activation, that is, activation in the cerebellum changed in a parallel, but inverse relationship with performance. Linear regression analysis demonstarated that the inverse correlation between cerebellar activation and motor performance was significant. Repeated practice at the random paradigm did not produce improvements in performance and cerebellar activity remained high. The data support the hypothesis that the cerebellum is strongly activated when motor performance is inaccurate, consistent with a role for the cerebellum in the detection of, and correction for visuomotor errors.
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Affiliation(s)
- D Flament
- Department of Neurosurgery, University of Minnesota, Minneapolis, Minnesota 55455, USA
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Cho IJ, Ki SH, Brooks C, Kim SG. Role of hepatitis B virus X repression of C/EBPbeta activity in the down-regulation of glutathione S-transferase A2 gene: implications in other phase II detoxifying enzyme expression. Xenobiotica 2009; 39:182-92. [PMID: 19255944 DOI: 10.1080/00498250802549808] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
1. A genome-wide in silico screening rendered the genes of phase II enzymes in the rat genome whose promoters contain the putative DNA elements interacting with CCAAT/enhancer binding protein (C/EBP) and NF-E2-related factor (Nrf2). The hepatitis B virus X (HBx) protein strongly modulates the transactivation and/or the repression of genes regulated by some bZIP transcription factors. 2. This study investigated the effects of HBx on the induction of phase II enzymes with the aim of elucidating the role of HBx interaction with C/EBPbeta or Nrf2 bZIP transcription factors in hepatocyte-derived cells. 3. Immunoblot and reporter gene analyses revealed that transfection of HBx interfered with the constitutive and inducible GSTA2 transactivation promoted by oltipraz (C/EBPbeta activator), but not that by tert-butylhydroquinone (t-BHQ, Nrf2 activator). Moreover, HBx transfection completely inhibited GSTA2 reporter gene activity induced by C/EBPbeta, but failed to inhibit that by Nrf2. 4. Gel shift assays identified that HBx inhibited the increase in C/EBPbeta-DNA complex formation by oltipraz, but not the increase in Nrf2-DNA complex by t-BHQ. Immunoprecipitation and immunoblot assays verified the direct interaction between HBx and C/EBPbeta. Moreover, chromatin immunoprecipitation assays confirmed HBx inhibition of C/EBPbeta binding to its binding site in the GSTA2 gene promoter. HBx repressed the induction of other phase II enzymes including GSTP, UDP-glucuronyltransferase 1A, microsomal epoxide hydrolase, GSTM1, GSTM2, and gamma-glutamylcysteine synthase. 5. These results demonstrate that HBx inhibits the induction of phase II detoxifying enzymes, which is mediated by its interaction with C/EBPbeta, but not Nrf2, substantiating the specific role of HBx in phase II detoxifying capacity.
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Affiliation(s)
- I J Cho
- Innovative Drug Research Center for Metabolic and Inflammatory Disease, College of Pharmacy, Seoul National University, Seoul, South Korea
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Lee SJ, Yang JW, Cho IJ, Kim WD, Cho MK, Lee CH, Kim SG. The gep oncogenes, Galpha(12) and Galpha(13), upregulate the transforming growth factor-beta1 gene. Oncogene 2009; 28:1230-40. [PMID: 19151758 DOI: 10.1038/onc.2008.488] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Transforming growth factor-beta1 (TGFbeta1) plays a role in neoplastic transformation and transdifferentiation. Galpha(12) and Galpha(13), referred to as the gep oncogenes, stimulate mitogenic pathways. Nonetheless, no information is available regarding their roles in the regulation of the TGFbeta1 gene and the molecules linking them to gene transcription. Knockdown or knockout experiments using murine embryonic fibroblasts and hepatic stellate cells indicated that a Galpha(12) and Galpha(13) deficiency reduced constitutive, auto-stimulatory or thrombin-inducible TGFbeta1 gene expression. In contrast, transfection of activated mutants of Galpha(12) and Galpha(13) enabled the knockout cells to promote TGFbeta1 induction. A promoter deletion analysis suggested that activating protein 1 (AP-1) plays a role in TGFbeta1 gene transactivation, which was corroborated by the observation that a deficiency of the G-proteins decreased the AP-1 activity, whereas their activation enhanced it. Moreover, mutation of the AP-1-binding site abrogated the ability of Galpha(12) and Galpha(13) to induce the TGFbeta1 gene. Transfection of a dominant-negative mutant of Rho or Rac, but not Cdc42, prevented gene transactivation and decreased AP-1 activity downstream of Galpha(12) and Galpha(13). In summary, Galpha(12) and Galpha(13) regulate the expression of the TGFbeta1 gene through an increase in Rho/Rac-dependent AP-1 activity, implying that the G-protein-coupled receptor (GPCR)-Galpha(12) pathway is involved in the TGFbeta1-mediated transdifferentiation process.
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Affiliation(s)
- S J Lee
- Innovative Drug Research Center for Metabolic and Inflammatory Disease, College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Kwanak-Gu, Seoul, Korea
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Yoo HJ, An HG, Park SY, Ryu OH, Kim HY, Seo JA, Hong EG, Shin DH, Kim YH, Kim SG, Choi KM, Park IB, Yu JM, Baik SH. Use of a real time continuous glucose monitoring system as a motivational device for poorly controlled type 2 diabetes. Diabetes Res Clin Pract 2008; 82:73-9. [PMID: 18701183 DOI: 10.1016/j.diabres.2008.06.015] [Citation(s) in RCA: 129] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2008] [Revised: 06/04/2008] [Accepted: 06/11/2008] [Indexed: 10/21/2022]
Abstract
OBJECTIVE The use of a real time continuous glucose monitoring system (RT-CGM) was studied as a behavior modification tool and the effectiveness of a RT-CGM in glucose control for patients with type 2 diabetes was determined. METHODS We conducted a prospective, open-label, randomized, controlled clinical trial in 65 patients with poorly controlled type 2 diabetes (8.0</=HbA1c</=10%) over a 3-month period. The intervention group was monitored monthly with a RT-CGM (three days at a time for 3 months) and the control group continued self-monitoring blood glucose (SMBG) at least four times a week for 3 months. RESULTS The HbA1c of the RT-CGM group was significantly reduced after 12 weeks compared with the SMBG group (9.1+/-1.0% to 8.0+/-1.2% vs. 8.7+/-0.7% to 8.3+/-1.1%, respectively; P=0.004). In the RT-CGM group, there was a significant reduction in total daily calorie intake, weight, body mass index (BMI), and postprandial glucose level, and a significant increase in total exercise time per week after 3 months. CONCLUSIONS We demonstrated that the RT-CGM was useful in modifying a patient's diet and exercise habits and could induce better glycemic control than SMBG for patients with type 2 diabetes.
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Affiliation(s)
- H J Yoo
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Korea University Medical Center, Korea University College of Medicine, Seoul 152-050, Republic of Korea
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Perkins GA, Goodman LB, Dubovi EJ, Kim SG, Osterrieder N. Detection of equine herpesvirus-1 in nasal swabs of horses by quantitative real-time PCR. J Vet Intern Med 2008; 22:1234-8. [PMID: 18691363 DOI: 10.1111/j.1939-1676.2008.0172.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Early identification of inhalation-transmitted equine herpesvirus type 1 (EHV-1) infections has been facilitated by the availability of a number of real-time quantitative PCR (qPCR) tests. A direct comparison between nasal swab qPCR and traditional virus isolation (VI) requires a method for normalizing the qPCR samples and controlling for PCR inhibitors present in some clinical samples. OBJECTIVES To quantify EHV-1 shedding in viral swabs using an internal control and to compare fast qPCR to VI for the detection of EHV-1 in nasal swabs from horses. ANIMALS Fifteen horses experimentally infected with EHV-1. METHODS Experimental study: Nasal swab samples were collected daily after experimental infection for up to 21 days. VI was performed by conventional methods. The DNA was prepared for qPCR with the addition of a known quantity DNA of Marek's disease virus as an internal control. qPCR was performed. RESULTS The qPCR method detected virus up to day 21 after challenge, whereas VI detected virus only to day 5. The median Kaplan-Meier estimates for EHV-1 detection were 12 days for qPCR and 2 days for VI (P< .0001). When compared with VI, the sensitivity and specificity of qPCR were 97 (95% CI: 86-100) and 27% (95% CI: 20-35). CONCLUSIONS AND CLINICAL IMPORTANCE We conclude that fast qPCR of nasal swab samples should be chosen for diagnosis and monitoring of herpesvirus-induced disease in horses. Recommended reference ranges of C(T) values are provided as well as justification of a minimum 10-day quarantine period.
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Affiliation(s)
- G A Perkins
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
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Khan Z, Kim SG, Jeon YH, Khan HU, Son SH, Kim YH. A plant growth promoting rhizobacterium, Paenibacillus polymyxa strain GBR-1, suppresses root-knot nematode. Bioresour Technol 2008; 99:3016-23. [PMID: 17706411 DOI: 10.1016/j.biortech.2007.06.031] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2007] [Revised: 06/04/2007] [Accepted: 06/04/2007] [Indexed: 05/16/2023]
Abstract
Exposure of root-knot nematode, Meloidogyne incognita to various concentrations (5-100%) of culture filtrate of Paenibacillus polymyxa GBR-1 under in vitro conditions significantly reduced egg hatch and caused substantial mortality of its juveniles. The increase in the exposure durations of juveniles to culture filtrate and its concentrations increased the mortality rate. Similarly, higher concentrations increased its inhibitory effect on egg hatch. In higher concentrations (25-100%) egg hatch was inhibited by 84-91% after 2 days of exposures as compared to control in sterile distilled water. Application of various concentrations of culture filtrate extract or bacterial suspension of P. polymyxa GBR-1 into potting soil infested with 2000 J2 of M. incognita, reduced the root galling and nematode populations and increased tomato plant growth and root-mass production compared with untreated control (P< or = 0.05). The beneficial effect of P. polymyxa GBR-1 into potted soil increased exponentially with the increase in dose concentrations. Root gall index was reduced from 4.8 to 1.4 and 1.8 when potting soil was treated with 10% concentrations of culture filtrate extract and bacterial suspension, respectively, compared with untreated control. Application of bacterial suspension of P. polymyxa GBR-1 into potted soil at 3 day pre-inoculation of nematode was the most effective followed by simultaneously and at 2 days post-inoculation; as root galling was reduced by 62.5%, 58.3% and 50.0%, respectively, compared with untreated control.
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Affiliation(s)
- Z Khan
- Department of Agricultural Biotechnology and Center for Plant Molecular Genetics and Breeding Research, Seoul National University, Seoul 151-921, Republic of Korea
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Seo JA, Kim NH, Park SY, Kim HY, Ryu OH, Lee KW, Lee J, Kim DL, Choi KM, Baik SH, Choi DS, Kim SG. Serum retinol-binding protein 4 levels are elevated in non-alcoholic fatty liver disease. Clin Endocrinol (Oxf) 2008; 68:555-60. [PMID: 17941908 PMCID: PMC2344088 DOI: 10.1111/j.1365-2265.2007.03072.x] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVE Retinol-binding protein 4 (RBP4) is a recently identified adipokine that is elevated in the serum in several insulin-resistant states. We investigated the relationship between non-alcoholic fatty liver disease (NAFLD) and serum RBP4 in nondiabetic adults. METHODS One hundred and fifty-nine nondiabetic, non-alcoholic subjects (95 males and 64 females) participated in this study. Division of subjects into a NAFLD group (n = 73; 45 males and 28 females) or a normal group (n = 86; 50 males and 36 females) was based on the presence of fatty liver disease determined by sonography. RESULTS Serum RBP4 levels in the NAFLD group were significantly higher than those in the normal group (62.8 +/- 16.0 mg/l vs. 51.7 +/- 14.6 mg/l, P < 0.0001). Multiple logistic regression analysis revealed that the RBP4 level was an independent factor associated with NAFLD (P = 0.0042). In addition, serum RBP4 levels were positively correlated with serum alanine aminotransferase (ALT), aspartate aminotransferase (AST) and gamma-glutamyltranspeptidase (GGT) levels. The significant association between serum RBP4 and GGT levels remained even after adjusting for age, gender, body mass index, the homeostasis model of assessment (HOMA) value and the presence of NAFLD (r = 0.3097, P = 0.0002). CONCLUSION Serum RBP4 levels are significantly associated with NAFLD and liver enzymes.
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Affiliation(s)
- J A Seo
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Korea.
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Kim JS, Chung SJ, Choi YS, Cheon JH, Kim CW, Kim SG, Jung HC, Song IS. Helicobacter pylori eradication for low-grade gastric mucosa-associated lymphoid tissue lymphoma is more successful in inducing remission in distal compared to proximal disease. Br J Cancer 2007; 96:1324-8. [PMID: 17406363 PMCID: PMC2360178 DOI: 10.1038/sj.bjc.6603708] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
A series of studies has shown that Helicobacter pylori eradication induces remission in most patients with low-grade gastric mucosa-associated lymphoid tissue (MALT) lymphoma. However, there have been few reports about the effect of bacterial treatment on the gastric MALT lymphoma in Korea, a well-known H. pylori endemic area. A total of 111 H. pylori-infected patients were prospectively enrolled in Seoul National University Hospital and 99 among them were completely followed up according to our protocol. After H. pylori eradication, tumoural response was evaluated by endoscopy and histopathology every 2–3 months till complete remission (CR) and every 6 months after achieving CR. Median follow-up period was 41 months (range, 11–125 months). Helicobacter pylori was successfully eradicated in all 99 patients and CR was obtained in 84 (84.8%) of 99 patients. The median time to reach CR was 3 months and 94% of CR is in continuous complete remission. Five patients with CR relapsed after 10–22 months without the evidence of H. pylori reinfection. Cumulative recurrence rate was 2.3, 7.7 and 9.3% at 1, 2 and 3 years, respectively. Tumours were mainly located in distal stomach (67.7%) and tumours in distal stomach were associated with more favourable response than those in proximal stomach (P=0.001). Majority of patients with low-grade gastric MALT lymphoma treated by exclusive H. pylori eradication have a favourable long-term outcome, offering a real chance of cure. Tumour location could be a predictive factor for remission following H. pylori eradication.
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Affiliation(s)
- J S Kim
- Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - S J Chung
- Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Y S Choi
- Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - J H Cheon
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - C W Kim
- Department of Pathology, Seoul National University College of Medicine, Seoul, Korea
| | - S G Kim
- Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - H C Jung
- Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - I S Song
- Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, 28 Yongon-Dong, Chongno-Gu, Seoul 110-744, South Korea. E-mail:
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Choi KM, Ryu OH, Lee KW, Kim HY, Seo JA, Kim SG, Kim NH, Choi DS, Baik SH. Serum adiponectin, interleukin-10 levels and inflammatory markers in the metabolic syndrome. Diabetes Res Clin Pract 2007; 75:235-40. [PMID: 16872712 DOI: 10.1016/j.diabres.2006.06.019] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2006] [Accepted: 06/19/2006] [Indexed: 10/24/2022]
Abstract
We examined the association between interleukin-10 (IL-10), adiponectin levels and inflammatory markers such as interleukin-6 (IL-6) and high-sensitive C-reactive protein (hsCRP). Furthermore, the association of these anti-/pro-inflammatory cytokine levels with the metabolic syndrome was investigated. The study subjects were composed of 312 Korean individuals without diabetes. Serum adiponectin level was associated with hsCRP (r=-0.21, P<0.001), IL-6 (r=-0.13, P<0.05) and IL-10 (r=-0.22, P<0.001) levels. Subjects without the metabolic syndrome showed higher adiponectin (17.03 microg/ml versus 13.85 microg/ml, P<0.001) and IL-10 (4.74 pg/ml versus 4.34 pg/ml, P=0.014) levels, and lower serum hsCRP (0.38 microg/ml versus 0.66 microg/ml, P=0.001) and IL-6 (0.94 pg/ml versus 1.32 pg/ml, P=0.009) levels compared to those with the metabolic syndrome. In multiple logistic regression analysis, the metabolic syndrome was associated with sex, age, waist circumference, systolic blood pressure, HDL cholesterol, triglyceride, fasting blood glucose and interleukin-10. Furthermore, serum adiponectin levels are associated with serum hsCRP, IL-6 and IL-10 levels. These results suggest that adiponectin might be associated with the metabolic syndrome through regulation of pro-/anti-inflammatory cytokines.
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Affiliation(s)
- K M Choi
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea
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Khan Z, Kim YH, Kim SG, Kim HW. Observations on the suppression of root-knot nematode (Meloidogyne arenaria) on tomato by incorporation of cyanobacterial powder (Oscillatoria chlorina) into potting field soil. Bioresour Technol 2007; 98:69-73. [PMID: 16458501 DOI: 10.1016/j.biortech.2005.11.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2005] [Revised: 11/21/2005] [Accepted: 11/21/2005] [Indexed: 05/06/2023]
Abstract
Experiments were carried out to investigate the nematicidal potential of a cyanobacterium, Oscillatoria chlorina, against the root-knot nematode, Meloidogyne arenaria on tomato plants grown in pots filled with 500 cm3 of field soil infested with 12-s stage juveniles (J2)/cm3 soil. Incorporation of freeze-dried cyanobacterial powder into potted field soil at the rate of 0.2%, 0.4%, 0.6%, 0.8% and 1.0% (w/w) 5 days prior to tomato planting, reduced root galling, final population of M. arenaria and increased vegetative growth of tomato plants and root-mass production, compared with untreated control (P > or = 0.05). The beneficial effect of adding cyanobacterial powder into infested potted field soil increased exponentially with concentration up to 0.8%. Root galling and nematode population decreased by 68.9% and 97.6%, respectively at the highest dose (1%) of cyanobacterial powder compared with the untreated control. Addition of cyanobacterial powder into infested potted field soil at 5 days before planting was the most effective followed by 2 days before and at the time of tomato planting. We conclude that application rate and timing are important factors in the control of root-knot nematodes with O. chlorina.
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Affiliation(s)
- Z Khan
- School of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea
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Ye BD, Cheon JH, Choi KD, Kim SG, Kim JS, Jung HC, Song IS. Omeprazole may be superior to famotidine in the management of iatrogenic ulcer after endoscopic mucosal resection: a prospective randomized controlled trial. Aliment Pharmacol Ther 2006; 24:837-43. [PMID: 16918888 DOI: 10.1111/j.1365-2036.2006.03050.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Acid suppressing agents are widely used to treat the iatrogenic ulcers following endoscopic mucosal resection for gastric neoplasms. However, the relative merits of proton pump inhibitor or histamine(2)-receptor antagonist for endoscopic mucosal resection-induced ulcers are not known. AIM To prospectively compare omeprazole and famotidine for the healing of endoscopic mucosal resection-induced ulcers and for bleeding control. METHODS After endoscopic mucosal resection, patients were randomly assigned to omeprazole (20 mg/day) or to famotidine (40 mg/day) group for a 28-day treatment period. The ulcer sizes and stages, bleeding rates and ulcer-related symptoms were compared. RESULTS A total of 100 patients were randomized equally to each group. Forty-one patients in each group were finally compared. The two groups were comparable in terms of baseline characteristics. Twenty-eight days after treatment, the two groups were not different with respect to ulcer stage (P = 0.137) or ulcer reduction ratio (P = 0.380). No difference was observed with respect to ulcer-related symptoms (P = 0.437) and no bleeding episode occurred in any of the 82 patients. In subgroup that underwent endoscopic submucosal dissection, fewer patients in the omeprazole group showed active ulcers than those in the famotidine group (P = 0.035). CONCLUSION Our results demonstrate that omeprazole may be superior to famotidine for iatrogenic ulcers following endoscopic mucosal resection, especially for large ulcers.
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Affiliation(s)
- B D Ye
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Chongno-gu, Seoul, Korea
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50
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Park DJ, Lee HJ, Kim SG, Jung HC, Song IS, Lee KU, Choe KJ, Yang HK. Intraoperative gastroscopy for gastric surgery. Surg Endosc 2006; 19:1358-61. [PMID: 16193377 DOI: 10.1007/s00464-004-2217-0] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2004] [Accepted: 07/14/2005] [Indexed: 01/26/2023]
Abstract
BACKGROUND Few reports are available on the use of intraoperative gastroscopy for gastric surgery. METHODS The details of 33 patients (25 early gastric cancers and eight gastric submucosal tumors) who underwent intraoperative gastroscopy from June 2003 to June 2004 were analyzed. The type of operation or resection margin was determined by evaluating both sides of the stomach simultaneously by combined operative and gastroscopic methods. RESULTS Preoperative endoscopic clipping was done preferentially for early gastric cancer. However, when precise localization was needed, intraoperative gastroscopy was used. Curative gastric resection was possible in 25 early gastric cancer patients after accurate lesion localization. Laparoscopic wedge resections of submucosal tumors were performed in seven patients without stenosis by combined laparoscopic and gastroscopic methods. CONCLUSIONS Intraoperative gastroscopy can be used effectively during gastric surgery for early gastric cancer or submucosal tumors and can be regarded as a modern stethoscope to gastric surgeons.
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Affiliation(s)
- D J Park
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
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