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Akindolie MS, Choi HJ. Surface modification of spent coffee grounds using phosphoric acid for enhancement of methylene blue adsorption from aqueous solution. Water Sci Technol 2022; 85:1218-1234. [PMID: 35228365 DOI: 10.2166/wst.2022.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In this study, the surface of the spent coffee grounds (SCG) was activated using phosphoric acid to increase the removal efficiency of methylene blue (MB) in aqueous solution, which is one of the harmful substances emitted in industrial processes. According to Fourier transform infra-red analysis, after phosphorylation of the SCG (PSCG), P = O group, P-O-C (aromatic) bond, P = OOH and P-O-P were newly introduced on the surface of the adsorbent, and the peaks of carboxyl groups and OH-group were large and broad. In addition, the surface area and mesopore range of the PSCG adsorbent were increased, and the structure changed, which enabled easy adsorption of MB. The process of adsorbing MB from aqueous solution using PSCG was more suitable for the pseudo-second order and Langmuir models, and the adsorption process was closer to chemisorption than physical adsorption. The maximum adsorption capacity of PSCG was 188.68 mg/g. As a result of the reuse test, PSCG showed excellent performance with a high removal efficiency of 90% up to four consecutive uses. PSCG modified with phosphoric acid, an abundant lignocellulose-based biosorbent that is readily available everywhere, is a promising adsorbent capable of adsorbing MB in aqueous solution.
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Affiliation(s)
- M S Akindolie
- Research Center for Marine Bio-Food and Medicine, Catholic Kwandong University, Beomil-ro 579 Beon-gil, 25601 Gangneung-si, Republic of Korea
| | - H J Choi
- Department of Biomedical Science, Catholic Kwandong University, Beomil-ro 579 beon-gil, 25601 Gangneung-si, Republic of Korea E-mail:
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Choi A, Kim JH, Chung HK, Ahn CW, Choi HJ, Kim YS, Nam JS. The Effects of C. lacerata on Insulin Resistance in Type 2 Diabetes Patients. J Diabetes Res 2022; 2022:9537741. [PMID: 35242882 PMCID: PMC8888035 DOI: 10.1155/2022/9537741] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 01/07/2022] [Accepted: 01/17/2022] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Several experimental studies have suggested beneficial effects of Ceriporia lacerata on glucose metabolism. However, there has been no human study assessing the effects of C. lacerata on glucose metabolism. Therefore, we investigated whether C. lacerata improves glucose control and insulin resistance in type 2 diabetes patients. METHODS Ninety patients diagnosed with type 2 diabetes (T2DM) for more than 6 months were enrolled. Subjects were randomly divided into placebo (n = 45) or C. lacerata (n = 45) groups and then assigned to take placebo or C. lacerata capsules (500 mg/capsule) for a 12-week intervention period. Biochemical markers, including fasting glucose, 2-hour postprandial plasma glucose, and lipid profile levels, as well as insulin, c-peptide, and Hba1c, were measured. Furthermore, insulin sensitivity indices, such as HOMA-IR, HOMA-beta, and QUICKI, were assessed before and after the 12-week administration. RESULTS Eighty-four patients completed the study. There were no significant differences in fasting, postprandial glucose, HbA1c, or lipid parameters. HOMA-IR and QUICKI indices were improved at week 12 in the C. lacerata group, especially in subjects with HOMA-IR of 1.8 or more (p < 0.05). Fasting, postprandial c-peptide, and insulin levels decreased at week 12 in the C. lacerata group (p < 0.05). These significant differences were not observed in the placebo group. CONCLUSION Twelve-week administration of C. lacerata in T2DM patients resulted in significant improvement in insulin resistance, especially in those with lower insulin sensitivity. A larger population study with a longer follow-up period and an effort to elucidate the mechanism is warranted to further assess the effects of C. lacerata on T2DM patients.
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Affiliation(s)
- Arim Choi
- Division of Endocrinology, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Republic of Korea
| | - Jung Hye Kim
- Division of Endocrinology, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Republic of Korea
| | - Hye-Kyung Chung
- Severance Institute for Vascular and Metabolic Research, Yonsei University College of Medicine, Republic of Korea
| | - Chul Woo Ahn
- Division of Endocrinology, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Republic of Korea
- Severance Institute for Vascular and Metabolic Research, Yonsei University College of Medicine, Republic of Korea
| | - Hee Joon Choi
- Gangnam Severance Hospital, Biochemical Research Center, Republic of Korea
| | - Yu-Sik Kim
- Division of Endocrinology, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Republic of Korea
- Severance Institute for Vascular and Metabolic Research, Yonsei University College of Medicine, Republic of Korea
| | - Ji Sun Nam
- Division of Endocrinology, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Republic of Korea
- Severance Institute for Vascular and Metabolic Research, Yonsei University College of Medicine, Republic of Korea
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Seo CH, Park SE, Choi HJ. Laparoscopic donor right hepatectomy with external traction of the cystic duct (with video). J Visc Surg 2021; 158:356-357. [PMID: 34326017 DOI: 10.1016/j.jviscsurg.2021.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- C H Seo
- Division of Hepatobiliary-Pancreas surgery and Liver Transplantation, Department of Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, 06591 Seoul, Republic of Korea
| | - S E Park
- Division of Hepatobiliary-Pancreas surgery and Liver Transplantation, Department of Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, 06591 Seoul, Republic of Korea
| | - H J Choi
- Division of Hepatobiliary-Pancreas surgery and Liver Transplantation, Department of Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, 06591 Seoul, Republic of Korea.
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Choi HJ, Choi SH, You SH, Yoo RE, Kang KM, Yun TJ, Kim JH, Sohn CH, Park CK, Park SH. MGMT Promoter Methylation Status in Initial and Recurrent Glioblastoma: Correlation Study with DWI and DSC PWI Features. AJNR Am J Neuroradiol 2021; 42:853-860. [PMID: 33632732 DOI: 10.3174/ajnr.a7004] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 11/16/2020] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE O6-methylguanine-DNA methyltransferase (MGMT) promoter methylation status in primary and recurrent glioblastoma may change during treatment. The purpose of this study was to correlate MGMT promoter methylation status changes with DWI and DSC PWI features in patients with recurrent glioblastoma after standard treatment. MATERIALS AND METHODS Between January 2008 and November 2016, forty patients with histologically confirmed recurrent glioblastoma were enrolled. Patients were divided into 3 groups according to the MGMT promoter methylation status for the initial and recurrent tumors: 2 groups whose MGMT promoter methylation status remained, group methylated (n = 13) or group unmethylated (n = 18), and 1 group whose MGMT promoter methylation status changed from methylated to unmethylated (n = 9). Normalized ADC and normalized relative CBV values were obtained from both the enhancing and nonenhancing regions, from which histogram parameters were calculated. The ANOVA and the Kruskal-Wallis test followed by post hoc tests were performed to compare histogram parameters among the 3 groups. The t test and Mann-Whitney U test were used to compare parameters between group methylated and group methylated to unmethylated. Receiver operating characteristic curve analysis was used to measure the predictive performance of the normalized relative CBV values between the 2 groups. RESULTS Group methylated to unmethylated showed significantly higher means and 90th and 95th percentiles of the cumulative normalized relative CBV values of the nonenhancing region of the initial tumor than group methylated and group unmethylated (all P < .05). The mean normalized relative CBV value of the nonenhancing region of the initial tumor was the best predictor of methylation status change (P < .001), with a sensitivity of 77.78% and specificity of 92.31% at a cutoff value of 2.594. CONCLUSIONS MGMT promoter methylation status might change in recurrent glioblastoma after standard treatment. The normalized relative CBV values of the nonenhancing region at the first preoperative MR imaging were higher in the MGMT promoter methylation change group from methylation to unmethylation in recurrent glioblastoma.
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Affiliation(s)
- H J Choi
- From the Department of Radiology (H.J.C.), Cha Bundang Medical Center, Cha University, Seongnam, Korea
| | - S H Choi
- Department of Radiology (S.H.C., R.-E.Y., K.M.K., T.J.Y., J.-h.K., C.-H.S.), Seoul National University Hospital, Seoul, Korea
| | - S-H You
- Department of Radiology (S.-H.Y.), Korea University Hospital, Seoul, Korea
| | - R-E Yoo
- Department of Radiology (S.H.C., R.-E.Y., K.M.K., T.J.Y., J.-h.K., C.-H.S.), Seoul National University Hospital, Seoul, Korea
| | - K M Kang
- Department of Radiology (S.H.C., R.-E.Y., K.M.K., T.J.Y., J.-h.K., C.-H.S.), Seoul National University Hospital, Seoul, Korea
| | - T J Yun
- Department of Radiology (S.H.C., R.-E.Y., K.M.K., T.J.Y., J.-h.K., C.-H.S.), Seoul National University Hospital, Seoul, Korea
| | - J-H Kim
- Department of Radiology (S.H.C., R.-E.Y., K.M.K., T.J.Y., J.-h.K., C.-H.S.), Seoul National University Hospital, Seoul, Korea
| | - C-H Sohn
- Department of Radiology (S.H.C., R.-E.Y., K.M.K., T.J.Y., J.-h.K., C.-H.S.), Seoul National University Hospital, Seoul, Korea
| | - C-K Park
- Department of Neurosurgery (C.-K.P.), Seoul National University Hospital, Seoul, Korea
| | - S-H Park
- Department of Pathology (S.-H.P.), Seoul National University Hospital, Seoul, Korea
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Park HS, Kang B, Chon HJ, Im HS, Lee CK, Kim I, Kang MJ, Hwang JE, Bae WK, Cheon J, Park JO, Hong JY, Kang JH, Kim JH, Lim SH, Kim JW, Kim JW, Yoo C, Choi HJ. Liposomal irinotecan plus fluorouracil/leucovorin versus FOLFIRINOX as the second-line chemotherapy for patients with metastatic pancreatic cancer: a multicenter retrospective study of the Korean Cancer Study Group (KCSG). ESMO Open 2021; 6:100049. [PMID: 33578192 PMCID: PMC7878976 DOI: 10.1016/j.esmoop.2021.100049] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 12/31/2020] [Accepted: 01/03/2021] [Indexed: 12/16/2022] Open
Abstract
Background There is no clear consensus on the recommended second-line treatment for patients with metastatic pancreatic cancer who have disease progression following gemcitabine-based therapy. We retrospectively evaluated the clinical outcomes of liposomal irinotecan (nal-IRI) plus fluorouracil/leucovorin (FL) and FOLFIRINOX (fluorouracil, leucovorin, irinotecan, and oxaliplatin) in patients who had failed on the first-line gemcitabine-based therapy. Patients and methods From January 2015 to August 2019, 378 patients with MPC who had received nal-IRI/FL (n = 104) or FOLFIRINOX (n = 274) as second-line treatment across 11 institutions were included in this retrospective study. Results There were no significant differences in baseline characteristics between groups, except age and first-line regimens. With a median follow-up of 6 months, the median progression-free survival (PFS) was 3.7 months with nal-IRI/FL versus 4.6 months with FOLFIRINOX (P = 0.44). Median overall survival (OS) was 7.7 months with nal-IRI/FL versus 9.7 months with FOLFRINOX (P = 0.13). There was no significant difference in PFS and OS between the two regimens in the univariate and multivariate analyses. The subgroup analysis revealed that younger age (<70 years) was associated with better OS with FOLFIRINOX. In contrast, older age (≥70 years) was associated with better survival outcomes with nal-IRI/FL. Adverse events were manageable with both regimens; however, the incidence of grade 3 or higher neutropenia and peripheral neuropathy was higher in patients treated with FOLFIRINOX than with nal-IRI/FL. Conclusions Second-line nal-IRI/FL and FOLFIRINOX showed similar effectiveness outcomes after progression following first-line gemcitabine-based therapy. Age could be the determining factor for choosing the appropriate second-line therapy. This multicenter retrospective study investigated nal-IRI/FL and FOLFIRINOX outcomes after gemcitabine-based therapy. We found no significant differences in outcome between nal-IRI/FL and FOLFIRINOX treatment. Both regimens were well tolerated; however, neutropenia and peripheral neuropathy were more frequent with FOLFIRINOX. Age (cut-off, 70 years) showed differential efficacy between chemotherapy regimens.
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Affiliation(s)
- H S Park
- Division of Medical Oncology, Department of Internal Medicine, St. Vincent's Hospital, The Catholic University of Korea, Seoul, Korea
| | - B Kang
- Medical Oncology, CHA Bundang Medical Center, CHA University, Seongnam, Korea
| | - H J Chon
- Medical Oncology, CHA Bundang Medical Center, CHA University, Seongnam, Korea
| | - H-S Im
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - C-K Lee
- Division of Medical Oncology, Department of Internal Medicine, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea
| | - I Kim
- Department of Internal Medicine, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - M J Kang
- Department of Internal Medicine, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - J E Hwang
- Division of Hematology-Oncology, Department of Internal Medicine, Chonnam National University Medical School and Hwasun Hospital, Gwangju, Korea
| | - W K Bae
- Division of Hematology-Oncology, Department of Internal Medicine, Chonnam National University Medical School and Hwasun Hospital, Gwangju, Korea
| | - J Cheon
- Department of Hematology and Oncology, Ulsan University Hospital, Ulsan University College of Medicine, Ulsan, Korea
| | - J O Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University College of Medicine, Seoul, Korea
| | - J Y Hong
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University College of Medicine, Seoul, Korea
| | - J H Kang
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - J H Kim
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - S H Lim
- Division of Hematology-Oncology, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
| | - J W Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - J-W Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - C Yoo
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
| | - H J Choi
- Division of Medical Oncology, Department of Internal Medicine, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea.
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Choi HJ. Agricultural biowaste, rice bran, as carbon source to enhance biomass and lipid production: analysis with various growth rate models. Water Sci Technol 2020; 82:1120-1130. [PMID: 33055402 DOI: 10.2166/wst.2020.342] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
As a byproduct of agriculture, rice bran can be a good alternative carbon source to mass-produce microalgae and increase lipid content. The purpose of this study was to investigate the effects of rice bran extract (RBE) on the mass culture and oil content of microalgae. Various parameters were applied to the growth rate model to explain the dynamics of substrate inhibition and growth of microalgae. The rice bran contains 46.1% of carbohydrates, in which is 38.3% glucose, and is very suitable as a carbon source for microalgae growth. The culture with RBE had a four times higher biomass production than microalgae cultured on Jaworski's medium (JM) with a small amount of 1 g/L. In addition, for RBE, the lipid content was three times higher and saturated fatty acid was 3% lower than were those of JM. According to the above results, when Chlorella vulgaris is cultured using RBE, a high amount of biomass and high lipid content can be obtained with a small amount of RBE. RBE is a discarded waste and has a high content of glucose, so it can be replaced by an organic carbon source to increase microbial biomass growth and lipid content at low cost.
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Affiliation(s)
- H J Choi
- Department of Biosystems and Convergence Engineering, Beomil-ro 579, Catholic Kwandong University, Gangneung, Korea E-mail:
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Han ES, Na GH, Choi HJ, You YK, Kim DG. Effectiveness of Perioperative Immunologic Markers Monitoring for Predicting Early Acute Cellular Rejection After Living Donor Liver Transplantation. Transplant Proc 2019; 51:2648-2654. [PMID: 31477418 DOI: 10.1016/j.transproceed.2019.03.077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 02/20/2019] [Accepted: 03/04/2019] [Indexed: 11/25/2022]
Abstract
BACKGROUND The objective of this study was to determine whether perioperative immunologic markers monitoring could predict early acute cellular rejection (ACR) after living donor liver transplantation (LDLT). MATERIALS AND METHODS From September 2010 to June 2013, a total of 172 patients underwent LDLT at our transplant center. Of them, 26 patients were excluded because of infection. We retrospectively reviewed the remaining 146 patients. CD4 lymphocyte activity, T cell subsets test, and serum cytokine panel were checked on the day before transplantation and at 20 days after transplantation. These patients were divided into 3 groups: 1. normal liver function test (LFT) group; 2. increased LFT without rejection group; and 3. early ACR group. We excluded the increased LFT without rejection group in order to rule out multiple factors influencing immunologic factors. RESULTS CD4 lymphocyte activity (P = .004) was significantly increased while CD4+/CD25+/FOXP3+ cells (P < .001) and interleukin (IL)-17 (P = .002) levels were significantly decreased during the perioperative period. Pretransplant IL-6 (P = .014) and IL-17 (P = .029) levels in the early ACR group were significantly lower than those in the normal LFT group. The proportion of patients with increased IL-6 during perioperative period in the early ACR group was higher than that in the normal LFT group, although the difference was not statistically significant (P = .065). CONCLUSION Our results suggest that IL-6 and IL-17 levels are associated with early ACR in LDLT patients. However, whether monitoring perioperative immunologic markers could predict early ACR remains unclear. Further prospective studies are needed to reach a definite conclusion.
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Affiliation(s)
- E S Han
- Department of Surgery, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Buchoen, Korea
| | - G H Na
- Department of Surgery, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Buchoen, Korea.
| | - H J Choi
- Department of Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Y K You
- Department of Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - D G Kim
- Department of Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Kim ST, Kang JH, Lee J, Lee HW, Oh SY, Jang JS, Lee MA, Sohn BS, Yoon SY, Choi HJ, Hong JH, Kim MJ, Kim S, Park YS, Park JO, Lim HY. Capecitabine plus oxaliplatin versus gemcitabine plus oxaliplatin as first-line therapy for advanced biliary tract cancers: a multicenter, open-label, randomized, phase III, noninferiority trial. Ann Oncol 2019; 30:788-795. [PMID: 30785198 DOI: 10.1093/annonc/mdz058] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [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] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Capecitabine plus oxaliplatin (XELOX) has shown modest activity and tolerable toxicity in a phase II trial for biliary tract cancers (BTCs). Meanwhile, gemcitabine plus oxaliplatin (GEMOX) has been the reference arm in recent phase II and III trials for BTCs. We aimed to investigate the efficacy of XELOX versus GEMOX as first-line therapy for advanced BCTs. PATIENTS AND METHODS In this open-label, randomized, phase III, noninferiority trial, we randomly selected patients with metastatic BCTs to receive GEMOX (gemcitabine 1000 mg/m2 on days 1 and 8, and oxaliplatin 100 mg/m2 on day 1) or XELOX (capecitabine 1000 mg/m2, twice daily, on days 1-14 and oxaliplatin 130 mg/m2 on day 1) as first-line treatment, given every 3 weeks, totaling eight cycles. The primary end point was to prove the noninferiority of XELOX to GEMOX in terms of 6-month progression-free survival (PFS) rate. RESULTS In total, 114 patients randomly received GEMOX and 108 randomly received XELOX. The median PFS was 5.3 months for the GEMOX group and 5.8 months for the XELOX group. The 6-month PFS rate was 44.5% for the GEMOX group and 46.7% for the XELOX group. The 95% confidence interval of the 6-month PFS rate difference between both groups was -12% to 16%, meeting the criteria for noninferiority of XELOX to GEMOX. There was no difference in objective response (P=0.171) and median overall survival (P=0.131) between both groups. The most common grade three to four adverse events were neutropenia and thrombocytopenia. No patient died of treatment-related causes. The XELOX group had significantly lower frequencies of hospital visits than the GEMOX group (P<0.001). CONCLUSION XELOX showed significant noninferiority to GEMOX in terms of 6-month PFS rate. Thus, XELOX could be an alternative first-line treatment of BCTs. TRIAL REGISTRATION This study was registered in ClinicalTrials.gov (number NCT01470443).
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Affiliation(s)
- S T Kim
- Division of Hemato-oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul
| | - J H Kang
- Division of Hemato-oncology, Department of Medicine, Gyeongsang National University Hospital, Jinju
| | - J Lee
- Division of Hemato-oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul
| | - H W Lee
- Division of Hemato-oncology, Department of Medicine, Ajou University School of Medicine, Suwon
| | - S Y Oh
- Division of Hemato-oncology, Department of Medicine, Dong-A University School of Medicine, Busan
| | - J S Jang
- Division of Hemato-oncology, Department of Medicine, Chung-Ang University College of Medicine, Seoul
| | - M A Lee
- Division of Hemato-oncology, Department of Medicine, Seoul St Mary's Hospital, Catholic University, Seoul
| | - B S Sohn
- Division of Hemato-oncology, Department of Medicine, Sanggye Paik Hospital, Inje University College of Medicine, Seoul
| | - S Y Yoon
- Division of Hemato-oncology, Department of Medicine, Konkuk University Medical Center, Seoul
| | - H J Choi
- Division of Hemato-oncology, Department of Medicine, Yonsei University College of Medicine, Seoul
| | - J H Hong
- Division of Hemato-oncology, Department of Medicine, Incheon St Mary's Hospital, Catholic University, Incheon
| | - M-J Kim
- Statistics and Data Center, Research Institute for Future Medicine, Samsung Medical Center, Seoul, South Korea
| | - S Kim
- Statistics and Data Center, Research Institute for Future Medicine, Samsung Medical Center, Seoul, South Korea
| | - Y S Park
- Division of Hemato-oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul
| | - J O Park
- Division of Hemato-oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul.
| | - H Y Lim
- Division of Hemato-oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul.
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You MW, Kim N, Choi HJ. The value of quantitative CT texture analysis in differentiation of angiomyolipoma without visible fat from clear cell renal cell carcinoma on four-phase contrast-enhanced CT images. Clin Radiol 2019; 74:547-554. [PMID: 31010583 DOI: 10.1016/j.crad.2019.02.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 02/20/2019] [Indexed: 02/07/2023]
Abstract
AIM To investigate the diagnostic performance and usefulness of texture analysis in differentiating angiomyolipoma (AML) without visible fat from clear cell renal cell carcinoma (ccRCC) on four-phase contrast-enhanced computed tomography (CECT). MATERIALS AND METHODS Seventeen patients with AML without visible fat and 50 patients with ccRCC of size ≤4.5 cm who had also undergone preoperative four-phase CECT were included in this study. The histogram, grey-level co-occurrence matrix (GLCM), and grey-level run length matrix (GLRLM) were evaluated. Sequential feature selection (SFS) and support vector machine (SVM) classifier with leave-one-out cross validation were used. RESULTS Using the SFS and SVM classifiers, five texture features were selected; mean (unenhanced), standard deviation (unenhanced and excretory), cluster prominence (nephrographic), and long-run high grey-level emphasis (corticomedullary). Diagnostic performance of the five selected texture features for all CT phases was as follows: 82% sensitivity, 76% specificity, 85% accuracy, and 85 area under the receiver operating characteristic curve (AUC). In the subgroup analysis, the AUCs of each phase were significantly >0.5 (p<0.05). In the pairwise comparison of AUCs between four phases, there were no significant differences between the four phases except the unenhanced and corticomedullary phases (p=0.015), i.e., the unenhanced phase showed slightly higher AUC than the corticomedullary phase. CONCLUSIONS Texture analysis of small renal masses (≤4.5 cm) on four-phase CECT can accurately differentiate AML without visible fat from ccRCC and showed good diagnostic performance for both the unenhanced and enhanced phases.
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Affiliation(s)
- M-W You
- Department of Radiology, Kyung Hee University Hospital, Seoul, South Korea
| | - N Kim
- Department of Convergence Medicine, Biomedical Engineering Research Center, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea
| | - H J Choi
- Department of Radiology, Seoul National University College of Medicine, and Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, South Korea.
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Park J, Lee M, Kim J, Choi HJ, Kwon A, Chung HS, Hong SH, Park CS, Choi JH, Chae MS. Intraoperative Management to Prevent Cardiac Collapse in a Patient With a Recurrent, Large-volume Pericardial Effusion and Paroxysmal Atrial Fibrillation During Liver Transplantation: A Case Report. Transplant Proc 2019; 51:568-574. [PMID: 30879592 DOI: 10.1016/j.transproceed.2018.12.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Accepted: 12/29/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND Pericardial effusion is a common feature of end-stage liver disease. In this case report we describe the intraoperative management of recurrent pericardial effusion, without re-pericardiocentesis, to prevent circulatory collapse during a critical surgical time-point; that is, during manipulation of the major vessels and graft reperfusion. METHODS A 47-year-old woman with hepatitis B was scheduled to undergo deceased donor liver transplantation (LT). A large pericardial effusion was preoperatively identified using transthoracic echocardiography (TTE). The patient also had paroxysmal atrial fibrillation. Two days before surgery, preemptive pericardiocentesis was performed and the 1150-mL effusion was drained. Intraoperatively, recurrence of the large pericardial effusion was identified using transesophageal echocardiography (TEE). During inferior vena cava manipulation, the surgeon consulted the anesthesiologist to evaluate the hemodynamic changes in the patient. After 3 attempts, the transplant team was able to determine the most appropriate anastomosis site, defined as that with the least impact on cardiac function. To prevent the development of severe postreperfusion syndrome, 10% MgSO4 (2 g) was gradually infused 20 minutes before portal vein declamping, and immediately before graft reperfusion a 100-μg bolus of epinephrine was administered. RESULTS During graft reperfusion, there was no evidence of heart chamber collapse or flow disturbance, as seen on the TEE findings. Postoperatively, the patient recovered completely and was discharged from the hospital. Six months after surgery, there was no sign of pericardial effusion on follow-up TTE. CONCLUSION Our intraoperative strategy may prevent cardiac collapse in patients with pericardial effusion detected during LT. Intraoperative TEE plays an important role in guiding hemodynamic management.
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Affiliation(s)
- J Park
- Department of Anesthesiology and Pain Medicine, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - M Lee
- Department of Anesthesiology and Pain Medicine, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - J Kim
- Department of Anesthesiology and Pain Medicine, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - H J Choi
- Department of Surgery, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - A Kwon
- Department of Cardiology, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - H S Chung
- Department of Anesthesiology and Pain Medicine, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - S H Hong
- Department of Anesthesiology and Pain Medicine, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - C S Park
- Department of Anesthesiology and Pain Medicine, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - J H Choi
- Department of Anesthesiology and Pain Medicine, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - M S Chae
- Department of Anesthesiology and Pain Medicine, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
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Kim I, Choi HJ, Ryu JM, Lee SK, Yu JH, Kim SW, Nam SJ, Seo SW, Lee JE. Abstract P2-08-52: A predictive model for distant metastasis in breast cancer patients using machine learning. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p2-08-52] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Introduction
Tumor metastasis is a major clinical challenge accounting for the vast majority of cancer related deaths.In previous studies, prediction of distant metastasis was based on subtypes,clinical status and sometimes gene expression were used however clinical application was difficult.
In this study, we develop the easy to use prediction tool for distant metastasis using clinical characteristics and gene profiles which came from CancerSCANTM, Next Generation Sequencing based targeted-sequencing platform designed at Samsung Medical Center(SMC).
Methods
We performed a retrospective chart review of 326 breast cancer patients who underwent surgery and CancerSCAN TM between Jan 2001 and Dec 2014 at SMC. Median follow up period was 83 months (Range 1˜190). Cancer scanTM cover 381 genes but 27 genes and 34 occasions (loss of function, mutation or copy number variation) were selected for analysis through gradient boosting and Wilcoxon Signed rank test. Azure Machine Learning is a cloud service that enables the execution of machine learning processes.This was accomplished using the steps of (1) edit the data, (2) split the data, (3) train the model, (4) score the model, and (5) evaluate the model. We split the modeling data into training and testing sets using a randomized 50–50 split. Two-class Decision Forest method was used. After deploying the Azure ML predictive model as a web service, we used a Representational State Transfer application programming interface to send data and obtained predictions in real-time.
Results
No distant metastasis group and distant metastasis group consisted of 267 and 59 patients, respectively. HR-/HER2+ and 50 years old and over patients were higher in metastasis group (p-value = 0.003 and p-value = 0.000). Nuclear grade 3 and N2,3 were higher in metastasis group (p-value = 0.010 and p-value = 0.000, p-value = 0.001 respectively). Stage III was also higher in metastasis group (p-value = 0.000). Among 59 patients with distantmetastasis, multiple sites metastasis was 21 cases (35.6%) and then lung metastasis was 19 cases (32.2%). In the 21 cases of multiple sites metastasis, triple sites was 6 cases (28.6%) and double sites was 15 cases (71.4%). PIK3CA mutation was the most frequent gene variation in all patients (34.5% of no metastasis group and 27.1% of metastasis group) but there was no difference between two groups(p-value = 0.278). BRCA 1 loss of function and BRCA2 loss of function were more frequent in metastasis group than no metastasis group(p-value = 0.033 and p-value = 0.024, respectively) but total counts was too small. We assessed the area under the curve (AUC) of the receiver operating characteristic (ROC) curve for predictive value. The AUC of ROC curve was 1.000 and also accuracy, precision, recall were 1.000. In addition, we conducted internal validation using 83 patients during 2015. When we applied a 0.5 threshold value with our predictive model, true negative was 81 and true positive was 2 among 83 patients. Finally, the accuracy of validation was 1.000.
Conclusion
Our predicted model could represent a useful and easy-to-access tool for the selection of patients with distant metastasis. After additional evaluation with large data and external validation, worldwide use of our model could be expected.
Citation Format: Kim I, Choi HJ, Ryu JM, Lee SK, Yu JH, Kim SW, Nam SJ, Seo SW, Lee JE. A predictive model for distant metastasis in breast cancer patients using machine learning [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P2-08-52.
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Affiliation(s)
- I Kim
- Samsung Medical Center, Seoul, Gangnam-Gu, Korea
| | - HJ Choi
- Samsung Medical Center, Seoul, Gangnam-Gu, Korea
| | - JM Ryu
- Samsung Medical Center, Seoul, Gangnam-Gu, Korea
| | - SK Lee
- Samsung Medical Center, Seoul, Gangnam-Gu, Korea
| | - JH Yu
- Samsung Medical Center, Seoul, Gangnam-Gu, Korea
| | - SW Kim
- Samsung Medical Center, Seoul, Gangnam-Gu, Korea
| | - SJ Nam
- Samsung Medical Center, Seoul, Gangnam-Gu, Korea
| | - SW Seo
- Samsung Medical Center, Seoul, Gangnam-Gu, Korea
| | - JE Lee
- Samsung Medical Center, Seoul, Gangnam-Gu, Korea
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12
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Choi HJ, Kim SW, Ryu JM, Kim I, Nam SJ, Yu J, Lee SK, Lee JE. Abstract P1-15-18: Not presented. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p1-15-18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
This abstract was not presented at the conference.
Citation Format: Choi HJ, Kim SW, Ryu JM, Kim I, Nam SJ, Yu J, Lee SK, Lee JE. Not presented [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P1-15-18.
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Affiliation(s)
- HJ Choi
- Samsung Medical Center, Seoul, Korea
| | - SW Kim
- Samsung Medical Center, Seoul, Korea
| | - JM Ryu
- Samsung Medical Center, Seoul, Korea
| | - I Kim
- Samsung Medical Center, Seoul, Korea
| | - SJ Nam
- Samsung Medical Center, Seoul, Korea
| | - J Yu
- Samsung Medical Center, Seoul, Korea
| | - SK Lee
- Samsung Medical Center, Seoul, Korea
| | - JE Lee
- Samsung Medical Center, Seoul, Korea
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13
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Kim JM, Choi HJ, Kim I, Ryu JM, Yu J, Lee JE, Kim SW, Nam SJ, Lee SK. Abstract P2-08-29: The impact of time interval between diagnosis and surgery in each type and stage of breast cancer. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p2-08-29] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: There are many factors that might contribute to the delay of surgery in patients with breast cancer. Previous studies investigate the influence of delay of surgery, but they reported inconsistent results. The purpose of this study was to evaluate the impact of time of surgery on prognosis of breast cancer.
Methods: We performed a retrospective review of the patients with breast cancer, who received surgery between 1992 and 2009, by using data from Korea Breast Cancer Society Registry. Kaplan-Meier survival analysis and Cox regression model were used to evaluate the impact of time to surgery in breast cancer and subgroup analyses were performed for each disease stage and molecular subtype.
Result: A total 14727 patients were included for analysis. Delay of surgery more than 31 days was associated with worse survival for breast cancer [hazard ratio (HR) = 2.16; 95% confidence interval (CI), 1.936-2.408, p<0.001]. Subgroup analyses revealed that over 31 days of surgical delay were significantly associated with worse survival in hormone receptor positive and HER-2 negative (p<0.001), hormone receptor positive and HER-2 positive (p<0.001), hormone receptor negative and HER-2 positive (p<0.001), triple negative (p<0.001) and stage II, III breast cancer patients (p<0.001).
Conclusion: Surgical delay of more than 31 days were independent risk factors for worse outcome of breast cancer in each molecular subtype and breast cancer group except stage 0 and I. Although preoperative evaluation is required, surgical delay should be shortened to enhance survival of breast cancer, especially in patients with tumor size more than 2cm or presence of lymph node metastasis.
Citation Format: Kim J-M, Choi HJ, Kim I, Ryu JM, Yu J, Lee JE, Kim SW, Nam SJ, Lee SK. The impact of time interval between diagnosis and surgery in each type and stage of breast cancer [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P2-08-29.
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Affiliation(s)
- J-M Kim
- Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Jinju, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - HJ Choi
- Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Jinju, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - I Kim
- Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Jinju, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - JM Ryu
- Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Jinju, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - J Yu
- Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Jinju, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - JE Lee
- Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Jinju, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - SW Kim
- Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Jinju, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - SJ Nam
- Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Jinju, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - SK Lee
- Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Jinju, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
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Abbas M, de Kraker MEA, Aghayev E, Astagneau P, Aupee M, Behnke M, Bull A, Choi HJ, de Greeff SC, Elgohari S, Gastmeier P, Harrison W, Koek MBG, Lamagni T, Limon E, Løwer HL, Lyytikäinen O, Marimuthu K, Marquess J, McCann R, Prantner I, Presterl E, Pujol M, Reilly J, Roberts C, Segagni Lusignani L, Si D, Szilágyi E, Tanguy J, Tempone S, Troillet N, Worth LJ, Pittet D, Harbarth S. Impact of participation in a surgical site infection surveillance network: results from a large international cohort study. J Hosp Infect 2018; 102:267-276. [PMID: 30529703 DOI: 10.1016/j.jhin.2018.12.003] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 12/03/2018] [Indexed: 10/27/2022]
Abstract
BACKGROUND Surveillance of surgical site infections (SSIs) is a core component of effective infection control practices, though its impact has not been quantified on a large scale. AIM To determine the time-trend of SSI rates in surveillance networks. METHODS SSI surveillance networks provided procedure-specific data on numbers of SSIs and operations, stratified by hospitals' year of participation in the surveillance, to capture length of participation as an exposure. Pooled and procedure-specific random-effects Poisson regression was performed to obtain yearly rate ratios (RRs) with 95% confidence intervals (CIs), and including surveillance network as random intercept. FINDINGS Of 36 invited networks, 17 networks from 15 high-income countries across Asia, Australia and Europe participated in the study. Aggregated data on 17 surgical procedures (cardiovascular, digestive, gynaecological-obstetrical, neurosurgical, and orthopaedic) were collected, resulting in data concerning 5,831,737 operations and 113,166 SSIs. There was a significant decrease in overall SSI rates over surveillance time, resulting in a 35% reduction at the ninth (final) included year of surveillance (RR: 0.65; 95% CI: 0.63-0.67). There were large variations across procedure-specific trends, but strong consistent decreases were observed for colorectal surgery, herniorrhaphy, caesarean section, hip prosthesis, and knee prosthesis. CONCLUSION In this large, international cohort study, pooled SSI rates were associated with a stable and sustainable decrease after joining an SSI surveillance network; a causal relationship is possible, although unproven. There was heterogeneity in procedure-specific trends. These findings support the pivotal role of surveillance in reducing infection rates and call for widespread implementation of hospital-based SSI surveillance in high-income countries.
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Affiliation(s)
- M Abbas
- Infection Control Programme and WHO Collaborating Centre on Patient Safety, The University of Geneva Hospitals and Faculty of Medicine, Geneva, Switzerland.
| | - M E A de Kraker
- Infection Control Programme and WHO Collaborating Centre on Patient Safety, The University of Geneva Hospitals and Faculty of Medicine, Geneva, Switzerland
| | - E Aghayev
- Swiss RDL, Institute for Social and Preventive Medicine, University of Bern, Bern, Switzerland; Schulthess Klinik, Zürich, Switzerland
| | - P Astagneau
- Reference Centre for Prevention and Control of Healthcare-associated Infections, APHP University Hospital, Paris, France
| | - M Aupee
- Coordination Center for Prevention and Control of Nosocomial Infections (CClin) Ouest, Rennes, France
| | - M Behnke
- Institute of Hygiene and Environmental Medicine, National Reference Centre for the Surveillance of Nosocomial Infections, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - A Bull
- Victorian Healthcare Associated Infection Surveillance System Coordinating Centre, Victoria, Australia
| | - H J Choi
- Division of Infectious Diseases, Office of Infection Control, Ewha Woman's University Medical Center, Seoul, Republic of Korea
| | - S C de Greeff
- National Institute for Public Health and the Environment (RIVM), Centre for Infectious Diseases Control (CIb), Epidemiology and Surveillance (EPI), Bilthoven, the Netherlands
| | - S Elgohari
- National Infection Service, Public Health England, London, UK
| | - P Gastmeier
- Institute of Hygiene and Environmental Medicine, National Reference Centre for the Surveillance of Nosocomial Infections, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - W Harrison
- Welsh Healthcare Associated Infection Programme (WHAIP), Public Health Wales, Cardiff, UK
| | - M B G Koek
- National Institute for Public Health and the Environment (RIVM), Centre for Infectious Diseases Control (CIb), Epidemiology and Surveillance (EPI), Bilthoven, the Netherlands
| | - T Lamagni
- National Infection Service, Public Health England, London, UK
| | - E Limon
- VINCat Coordinator Center, Catalan Health Department, University of Barcelona, Barcelona, Spain
| | - H L Løwer
- Norwegian Institute of Public Health, Department of Infectious Disease Epidemiology, Oslo, Norway
| | - O Lyytikäinen
- Department of Infectious Diseases, National Institute for Health and Welfare (THL), Helsinki, Finland
| | - K Marimuthu
- Department of Infectious Diseases, Institute of Infectious Diseases and Epidemiology, Tan Tock Seng Hospital, Singapore; Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - J Marquess
- Epidemiology and Research Unit, Communicable Diseases Branch, Department of Health, Queensland, Australia
| | - R McCann
- Healthcare Associated Infection Unit, Communicable Diseases Control Directorate, Department of Health Western Australia, Australia
| | - I Prantner
- National Center for Epidemiology, Budapest, Hungary
| | - E Presterl
- Medical University of Vienna, Department of Infection Control and Hospital Epidemiology, Vienna, Austria
| | - M Pujol
- VINCat Coordinator Center, Catalan Health Department, University of Barcelona, Barcelona, Spain; Hospital Universitari de Bellvitge, Barcelona, Spain; Spanish Network for the Research in Infectious Diseases, Instituto de Salud Carlos III, Madrid, Spain
| | - J Reilly
- Healthcare Associated Infection, Antimicrobial Resistance, Decontamination and Infection Control Group, Health Protection Scotland, NHS National Services Scotland, Glasgow, UK; Safeguarding Health Through Infection Prevention (SHIP) Research Group, Glasgow Caledonian University, Glasgow, UK
| | - C Roberts
- Welsh Healthcare Associated Infection Programme (WHAIP), Public Health Wales, Cardiff, UK
| | | | - D Si
- Epidemiology and Research Unit, Communicable Diseases Branch, Department of Health, Queensland, Australia
| | - E Szilágyi
- National Public Health and Medical Officer Service, Budapest, Hungary
| | - J Tanguy
- Coordination Center for Prevention and Control of Nosocomial Infections (CClin) Ouest, Rennes, France
| | - S Tempone
- Healthcare Associated Infection Unit, Communicable Diseases Control Directorate, Department of Health Western Australia, Australia
| | - N Troillet
- Swissnoso, National Center for Infection Prevention, Bern, Switzerland; Service of Infectious Diseases, Central Institute of the Valais Hospital, Sion, Switzerland
| | - L J Worth
- Victorian Healthcare Associated Infection Surveillance System Coordinating Centre, Victoria, Australia; Department of Medicine, University of Melbourne, Victoria, Australia
| | - D Pittet
- Infection Control Programme and WHO Collaborating Centre on Patient Safety, The University of Geneva Hospitals and Faculty of Medicine, Geneva, Switzerland
| | - S Harbarth
- Infection Control Programme and WHO Collaborating Centre on Patient Safety, The University of Geneva Hospitals and Faculty of Medicine, Geneva, Switzerland
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Chae MS, Kim Y, Oh SA, Jeon Y, Choi HJ, Kim YH, Hong SH, Park CS, Huh J. Intraoperative Management of a Patient With Impaired Cardiac Function Undergoing Simultaneous ABO-Compatible Liver and ABO-Incompatible Kidney Transplant From 2 Living Donors: A Case Report. Transplant Proc 2018; 50:3988-3994. [PMID: 30471833 DOI: 10.1016/j.transproceed.2018.08.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 08/16/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND Combined liver and kidney transplant is a very complex surgery. To date, there has been no report on the intraoperative management of patients with impaired cardiac function undergoing simultaneous ABO-compatible liver and ABO-incompatible kidney transplant from 2 living donors. CASE REPORT A 60-year-old man underwent simultaneous ABO-compatible liver and ABO-incompatible kidney transplant from 2 living donors because of IgA nephropathy and alcoholic liver cirrhosis. The preoperative cardiac findings revealed continuous aggravation, shown by large left atrial enlargement, severe left ventricular hypertrophy, a very prolonged QT interval, and a calcified left anterior descending coronary artery. Severe hypotension with very weak pulsation and severe bradycardia developed, with an irregular junctional rhythm noted immediately after the liver graft was reperfused. Although epinephrine was administered as a rescue drug, hemodynamics did not improve, and central venous pressure and mean pulmonary arterial pressure increased to potentially fatal levels. Emergency phlebotomy via the central line was performed. Thereafter, hypotension and bradycardia recovered gradually as the central venous pressure and mean pulmonary arterial pressure decreased. The irregular junctional rhythm returned to a sinus rhythm, but the QTc interval was slightly more prolonged. Because of poor cardiac capacity, the volume and rate of fluid infusion were increased aggressively to maintain appropriate kidney graft perfusion after confirming vigorous urine production of the graft. CONCLUSIONS A heart with impaired function due to both end-stage liver and kidney diseases may be less able to withstand surgical stress. Further study on cardiac dysfunction will be helpful for the management of patients undergoing complex transplant surgery.
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Affiliation(s)
- M S Chae
- Department of Anesthesiology and Pain Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Y Kim
- Department of Anesthesiology and Pain Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - S A Oh
- Department of Anesthesiology and Pain Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Y Jeon
- Department of Anesthesiology and Pain Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - H J Choi
- Department of Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Y H Kim
- Department of Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - S H Hong
- Department of Anesthesiology and Pain Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - C S Park
- Department of Anesthesiology and Pain Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - J Huh
- Department of Anesthesiology and Pain Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
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Kim CJ, Song KH, Park KH, Kim M, Choe PG, Oh MD, Lee SH, Jang HC, Kang SJ, Kim HY, Cheon S, Kwak YG, Choi HJ, Kwon KT, Jeon JH, Kim ES, Kim HB. Impact of antimicrobial treatment duration on outcome of Staphylococcus aureus bacteraemia: a cohort study. Clin Microbiol Infect 2018; 25:723-732. [PMID: 30287412 DOI: 10.1016/j.cmi.2018.09.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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: 02/12/2018] [Revised: 09/24/2018] [Accepted: 09/24/2018] [Indexed: 01/28/2023]
Abstract
OBJECTIVES To assess the outcome of Staphylococcus aureus bacteraemia (SAB) according to factors associated with necessity for longer treatment in conjunction with the duration of treatment. METHODS We prospectively collected the data of patients with SAB consecutively during 12 to 39 months from 11 hospitals. If multiple episodes of SAB occurred in one patient, only the first episode was enrolled. Factors associated with necessity for longer treatment were defined as follows: persistent bacteraemia, metastatic infection, prosthesis and endocarditis. If any of the factors were present, then the case was defined as longer antibiotic treatment warranted (LW) group; those without any factors were defined as shorter antibiotic treatment sufficient (SS) group. Poor outcome was defined as a composite of 90-day mortality or 30-day recurrence. Duration of antibiotic administration was classified as <14 or ≥14 days in the SS group and <28 or ≥28 days in the LW group. RESULTS Among 2098 cases, the outcome was analysed in 1866 cases, of which 591 showed poor outcome. The SS group accounted for 964 cases and the LW group for 852. On multivariate analysis, age over 65 years, pneumonia, higher Sequential Organ Failure Assessment (SOFA) score and chronic liver diseases were risk factors for poor outcome. Administration of antibiotics less than the recommendation was associated with poor outcome, but this significance was observed only in the LW group (adjusted odds ratio = 1.68; 95% confidence interval, 1.00-2.83; p 0.05). CONCLUSIONS Inappropriately short antibiotic treatment was associated with poor outcome in the LW group. Vigilant evaluation for risk factors to determine the duration of treatment may improve the outcome among patients with SAB.
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Affiliation(s)
- C-J Kim
- Department of Internal Medicine, Division of Infectious Diseases, Ewha Womans University School of Medicine, Seoul, South Korea
| | - K-H Song
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seognnam, South Korea; Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea
| | - K-H Park
- Department of Infectious Diseases, Chonnam National University Hospital, Gwangju, South Korea.
| | - M Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seognnam, South Korea
| | - P G Choe
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea; Department of Internal Medicine, Seoul National University Hospital, Seoul, South Korea
| | - M-D Oh
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea; Department of Internal Medicine, Seoul National University Hospital, Seoul, South Korea
| | - S H Lee
- Department of Internal Medicine, Pusan National University School of Medicine and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - H-C Jang
- Department of Internal Medicine, Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - S-J Kang
- Department of Internal Medicine, Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - H Y Kim
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, South Korea
| | - S Cheon
- Division of Infectious Diseases, Department of Internal Medicine, Chungnam National University School of Medicine, Daejon, South Korea
| | - Y G Kwak
- Department of Internal Medicine, Inje University Ilsan Paik Hospital, Goyang, South Korea
| | - H J Choi
- Department of Internal Medicine, Division of Infectious Diseases, Ewha Womans University School of Medicine, Seoul, South Korea
| | - K T Kwon
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, South Korea
| | - J H Jeon
- Inje University Haeundae Paik Hospital, Busan, South Korea
| | - E S Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seognnam, South Korea; Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea.
| | - H B Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seognnam, South Korea; Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea
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Kim YJ, Yoon JH, Kim SI, Choi HJ, Choi JY, Yoon SK, You YK, Kim DG. Impact of Pretransplant Infections on Clinical Course in Liver Transplant Recipients. Transplant Proc 2018; 50:1153-1156. [PMID: 29731084 DOI: 10.1016/j.transproceed.2018.01.036] [Citation(s) in RCA: 9] [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] [Received: 12/19/2017] [Accepted: 01/22/2018] [Indexed: 12/14/2022]
Abstract
BACKGROUND Uncontrolled infections are known to be an absolute contraindication for liver transplantation; however, the posttransplant prognosis of recipients treated for pretransplant infection is unclear. The aim of this study was to analyze pretransplant infections among liver transplant recipients and to determine their impact on posttransplant clinical outcomes. METHODS This study retrospectively analyzed 357 subjects who had undergone living-donor liver transplantation between January 2008 and May 2014. RESULTS Among 357 recipients, 71 patients (19.8%) had 74 episodes of infectious complications before liver transplantation. These complications consisted of pneumonia (n = 13), spontaneous bacterial peritonitis (n = 12), catheter-related infection (n = 10), urinary tract infection (n = 12), biliary tract infection (n = 6), and skin and soft-tissue infection (n = 3). Twenty-six patients experienced 29 episodes of bacteremia, and the most common pathogens were coagulase-negative staphylococci (n = 8), followed by Klebsiella pneumoniae (n = 7), Staphylococcus aureus (n = 4), and Streptococcus species (n = 3). Twenty-one bacteremic episodes (70%) occurred within 1 month before transplantation (n = 4). Recipients with pretransplant infections had significantly more frequent posttransplant infections (71.8% [51 of 71] vs 47.2% [35 of 286]; P = .0001), posttransplant bacteremia (33.8% [24 of 71] vs 20.3% [58 of 286]; P = .015), and longer posttransplant intensive care unit stays (11.2 ± 10.7 days vs 7.3 ± 4.2 days; P = .0004) than those without pretransplant infections. However, episodes of rejection (P = .36), length of hospitalization (P = .10), 28-day mortality (P = .31), and 1-year mortality (P = .61) after transplantation were not significantly different between the 2 groups. CONCLUSIONS Pretransplant infection had an impact on posttransplant morbidity, although not on rejection and mortality. Alertness for posttransplant infection and proper management (including effective antimicrobial coverage) would improve patient morbidity.
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Affiliation(s)
- Y J Kim
- Department of Internal Medicine, The Catholic University of Korea, College of Medicine, Seoul, Republic of Korea
| | - J H Yoon
- Department of Internal Medicine, The Seongae Hospital, College of Medicine, Seoul, Republic of Korea
| | - S I Kim
- Department of Internal Medicine, The Catholic University of Korea, College of Medicine, Seoul, Republic of Korea.
| | - H J Choi
- Department of Surgery, The Catholic University of Korea, College of Medicine, Seoul, Republic of Korea
| | - J Y Choi
- Department of Surgery, The Catholic University of Korea, College of Medicine, Seoul, Republic of Korea
| | - S K Yoon
- Department of Surgery, The Catholic University of Korea, College of Medicine, Seoul, Republic of Korea
| | - Y-K You
- Department of Surgery, The Catholic University of Korea, College of Medicine, Seoul, Republic of Korea
| | - D-G Kim
- Department of Surgery, The Catholic University of Korea, College of Medicine, Seoul, Republic of Korea
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Choi HJ, Im J, Lee JH, Kim SH, Shin MG. Identification of the novel HLA-B*15:18:01:04 in a Korean individual. HLA 2018; 92:99-100. [PMID: 29766670 DOI: 10.1111/tan.13295] [Citation(s) in RCA: 3] [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: 05/03/2018] [Revised: 05/05/2018] [Accepted: 05/07/2018] [Indexed: 11/30/2022]
Abstract
HLA-B*15:18:01:04 differs from HLA-B*15:18:01:02 by single nucleotide substitution at position 2176 (G > A).
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Affiliation(s)
- H J Choi
- Department of Laboratory Medicine, Chonnam National University Medical School & Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - J Im
- Department of Molecular Genetics, Biowithus Life Science Institute, Seoul, South Korea
| | - J H Lee
- Department of Laboratory Medicine, Chonnam National University Medical School & Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - S H Kim
- Department of Laboratory Medicine, Chonnam National University Medical School & Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - M G Shin
- Department of Laboratory Medicine, Chonnam National University Medical School & Chonnam National University Hwasun Hospital, Hwasun, South Korea
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19
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Ryu JM, Yu J, Nam SJ, Kim I, Lee JE, Lee SK, Kim JM, Choi HJ, Kim SW. Abstract P1-07-25: Differences among young breast cancer patients based on subtype: A study from the Korean Breast Cancer Society – Running head: Do breast cancers in 20s have worse prognosis than 30s? Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p1-07-25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Purpose Numerous studies demonstrated that breast cancer in young women (BCY) has unfavorable prognostic features and unfavorable subtype. However, there were few studies to evaluate the effect on the prognosis of breast cancer according to the subtype disparities by age especially BCY. We analyzed breast cancer mortality stratified tumor subtype according to age among the patients with less than 50 year-old. Patients and Methods Data obtained from the Korean Breast Cancer Society Registry (KBCSR), patients diagnosed with invasive breast cancer were retrospectively between 2003 and 2010. We excluded patients with male breast cancer, underwent neoadjuvant chemotherapy, distant metastasis or inflammatory breast cancer at presentation, and other histopathology except invasive ductal or invasive lobular carcinoma. We also excluded patients with lack of immunohistochemistry data and short-term follow-up duration (<12 months). Results We identified 37,865 patients, and excluded by study protocol. Among those, 30,793 patients with breast cancer for eligible for analysis, 793 (2.6%) were 20-29 years and 8,926 (28.8%) were 30-39 years of age. Median follow-up duration was 84 months. Mean age was 42.4 years old. Younger patients with breast cancer were more likely to have advanced stage, higher nuclear grade, present lymphovascular invasion, and more likely to be unfavorable subtype such as triple negative breast cancer (TNBC)
Table 1. Baseline Characteristics Age at Presentation 20-29, N(%)30-39, N(%)40-49, N(%)P-valueOverall793 (2.6)8,133 (26.4)21,867 (71.0) Pathologic stage <.0001I295 (37.2)2,928 (36.0)9,288 (42.5) II373 (47.0)3,644 (44.8)9,078 (41.5) III119 (15.0)1,442 (17.7)3,211 (14.7) Family history <.0001Yes81 (10.2)674 (8.3)1,391 (6.4) No712 (89.8)7,459 (91.7)20,476 (93.6) Nuclear grade <.0001Low85 (10.2)941 (11.6)3,824 (17.5) Intermediate288 (36.3)3,340 (41.1)9,688 (44.3) High331 (41.7)3,165 (38.9)6,650 (30.4) LVI <.0001Yes249 (31.4)2,840 (34.9)6,711 (30.7) No433 (54.6)4,367 (53.7)13,005 (59.5) Subtype <.0001Luminal A314 (39.6)3,529 (43.4)11,716 (53.6) Luminal B190 (24.0)1,895 (23.3)4,775 (21.8) Her-252 (6.6)724 (8.9)1,723 (7.9) TNBC237 (29.8)1,895 (24.4)3,653 (16.7) HER-2, human epidermal growth factor-2; TNBC, triple negative breast cancer
. Patients with younger age group showed worse prognosis than patients with older age patients. In multivariate analysis for overall survival, as patients were younger group, hazard ratio was increased, and the patients with TNBC showed higher HR than HER-2, Luminal B, and Luminal A subtype (P< .0001, P< .0001, P< .0001, and P< .0001, respectively). Stratified by subtype, luminal subtype showed significant worse prognosis as the age group was younger, while as, Her-2 and TNBC subtype showed no significantly difference by the age group. Conclusion Patients with 20s breast cancer showed unfavorable characteristics and worse prognosis than 30s and older aged group. Stratified by tumor subtype, breast cancer in 20s with luminal subtype showed worse prognosis, while as HER-2 and TNBC showed no significantly different compare to breast cancer in 30s.
Citation Format: Ryu JM, Yu J, Nam SJ, Kim I, Lee JE, Lee SK, Kim JM, Choi HJ, Kim SW. Differences among young breast cancer patients based on subtype: A study from the Korean Breast Cancer Society – Running head: Do breast cancers in 20s have worse prognosis than 30s? [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P1-07-25.
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Affiliation(s)
- JM Ryu
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J Yu
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - SJ Nam
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - I Kim
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - JE Lee
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - SK Lee
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - JM Kim
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - HJ Choi
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - SW Kim
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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Im IJ, Choi HJ, Jeong SM, Kim HJ, Son JS, Oh HJ. The association between muscle mass deficits and arterial stiffness in middle-aged men. Nutr Metab Cardiovasc Dis 2017; 27:1130-1135. [PMID: 29170061 DOI: 10.1016/j.numecd.2017.10.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [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: 05/26/2017] [Revised: 08/25/2017] [Accepted: 10/01/2017] [Indexed: 01/17/2023]
Abstract
BACKGROUND AND AIMS Early diagnosis of arteriosclerosis is fundamental for the prevention of cardiovascular morbidity and mortality. The current study was performed to identify major predictors of arteriosclerosis and to assess the association between arterial stiffness as measured by cardio-ankle vascular index (CAVI) and muscle mass deficit (MMD) estimated by bioelectrical impedance analysis (BIA) in middle-aged men. METHODS AND RESULTS Data were gathered from 3356 middle-aged men who visited a health promotion center. CAVI was measured as an index of arterial stiffness. Body composition analysis was performed using BIA. MMD was positively associated with CAVI in the regression model. The odds ratios for high-CAVI (≥9.0) rose with MMD grade in a dose-dependent manner after adjusting for age, lifestyle factors and current medication use. The estimated mean CAVI rose as MMD grade increased (P for trend >0.001). CONCLUSIONS MMD estimated from BIA was positively associated with arterial stiffness in middle-aged men. These findings show a close interaction between low muscle mass and cardiovascular risk.
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Affiliation(s)
- I J Im
- Department of Family Medicine, Eulji University Hospital, Daejeon, Republic of Korea
| | - H J Choi
- Department of Family Medicine, Eulji University Hospital, Daejeon, Republic of Korea.
| | - S M Jeong
- Department of Family Medicine, Eulji University Hospital, Daejeon, Republic of Korea
| | - H J Kim
- Department of Family Medicine, Eulji University Hospital, Daejeon, Republic of Korea
| | - J S Son
- Department of Family Medicine, Eulji University Hospital, Daejeon, Republic of Korea
| | - H J Oh
- Department of Family Medicine, Eulji University Hospital, Daejeon, Republic of Korea
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21
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Choi HJ, Sohn CH, You SH, Yoo RE, Kang KM, Yun TJ, Choi SH, Kim JH, Cho WS, Kim JE. Can Arterial Spin-Labeling with Multiple Postlabeling Delays Predict Cerebrovascular Reserve? AJNR Am J Neuroradiol 2017; 39:84-90. [PMID: 29146719 DOI: 10.3174/ajnr.a5439] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 09/04/2017] [Indexed: 01/15/2023]
Abstract
BACKGROUND AND PURPOSE The effect of delayed transit time is the main source of error in the quantitative measurement of CBF in arterial spin-labeling. In the present study, we evaluated the usefulness of the transit time-corrected CBF and arterial transit time delay from multiple postlabeling delays arterial spin-labeling compared with basal/acetazolamide stress technetium Tc99m-hexamethylpropylene amineoxime (Tc99m-HMPAO) SPECT in predicting impairment in the cerebrovascular reserve. MATERIALS AND METHODS Transit time-corrected CBF maps and arterial transit time maps were acquired in 30 consecutive patients with unilateral ICA or MCA steno-occlusive disease (severe stenosis or occlusion). Internal carotid artery territory-based ROIs were applied to both perfusion maps. Additionally, impairment in the cerebrovascular reserve was evaluated according to both qualitative and quantitative analyses of the ROIs on basal/acetazolamide stress Tc99m-HMPAO SPECT using a previously described method. The area under the receiver operating characteristic curve was used to evaluate the diagnostic accuracy of arterial spin-labeling in depicting impairment of the cerebrovascular reserve. The correlation between arterial spin-labeling and cerebrovascular reserve was evaluated. RESULTS The affected hemisphere had a decreased transit time-corrected CBF and increased arterial transit time compared with the corresponding values of the contralateral normal hemisphere, which were statistically significant (P < .001). The percentage change of transit time-corrected CBF and the percentage change of arterial transit time were independently differentiating variables (P < .001) for predicting cerebrovascular reserve impairment. The correlation coefficient between the arterial transit time and cerebrovascular reserve index ratio was -0.511. CONCLUSIONS Our results demonstrate that the transit time-corrected CBF and arterial transit time based on arterial spin-labeling perfusion MR imaging can predict cerebrovascular reserve impairment.
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Affiliation(s)
- H J Choi
- From the Department of Radiology (H.J.C.), CHA Bundang Medical Center, CHA University, Seongnam, Korea
| | - C-H Sohn
- Departments of Radiology (C.-H.S., R.-E.Y., K.M.K., T.J.Y., S.H.C., J.-H.K.)
| | - S-H You
- Department of Radiology (S.-H.Y.), Korea University Hospital, Seoul, Korea
| | - R-E Yoo
- Departments of Radiology (C.-H.S., R.-E.Y., K.M.K., T.J.Y., S.H.C., J.-H.K.)
| | - K M Kang
- Departments of Radiology (C.-H.S., R.-E.Y., K.M.K., T.J.Y., S.H.C., J.-H.K.)
| | - T J Yun
- Departments of Radiology (C.-H.S., R.-E.Y., K.M.K., T.J.Y., S.H.C., J.-H.K.)
| | - S H Choi
- Departments of Radiology (C.-H.S., R.-E.Y., K.M.K., T.J.Y., S.H.C., J.-H.K.)
| | - J-H Kim
- Departments of Radiology (C.-H.S., R.-E.Y., K.M.K., T.J.Y., S.H.C., J.-H.K.)
| | - W-S Cho
- Neurosurgery (W.-S.C., J.E.K.), Seoul National University Hospital, Seoul, Korea
| | - J E Kim
- Neurosurgery (W.-S.C., J.E.K.), Seoul National University Hospital, Seoul, Korea
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Choi HJ, Im J, Lee JH, Kim SH, Shin MG. HLA-DPB1*519:01, a new allele identified by sequence-based typing in a Korean individual. HLA 2017; 90:318-319. [PMID: 28776957 DOI: 10.1111/tan.13109] [Citation(s) in RCA: 2] [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: 07/26/2017] [Revised: 07/30/2017] [Accepted: 07/31/2017] [Indexed: 11/28/2022]
Abstract
The new allele DPB1*519:01 showed one nucleotide difference with DPB1*13:01:01 at codon 234 (GTG/ATG).
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Affiliation(s)
- H J Choi
- Department of Laboratory Medicine, Chonnam National University Medical School & Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - J Im
- Department of Molecular Genetics, Biowithus Life Science Institute, Seoul, South Korea
| | - J H Lee
- Department of Laboratory Medicine, Chonnam National University Medical School & Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - S H Kim
- Department of Laboratory Medicine, Chonnam National University Medical School & Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - M G Shin
- Department of Laboratory Medicine, Chonnam National University Medical School & Chonnam National University Hwasun Hospital, Hwasun, South Korea
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23
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Choi HJ, Lee JH, Kim SH, Shin MG. HLA-A*24:02:01:09, a new allele identified by sequence-based typing in a Korean individual. HLA 2017; 90:304-305. [PMID: 28742238 DOI: 10.1111/tan.13105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 07/19/2017] [Accepted: 07/19/2017] [Indexed: 11/29/2022]
Abstract
One nucleotide insertion between residues 1804 and 1805 of HLA-A*24:02:01:01 results in a new allele, HLA-A*24:02:01:09.
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Affiliation(s)
- H J Choi
- Department of Laboratory Medicine, Chonnam National University Medical School & Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - J H Lee
- Department of Laboratory Medicine, Chonnam National University Medical School & Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - S H Kim
- Department of Laboratory Medicine, Chonnam National University Medical School & Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - M G Shin
- Department of Laboratory Medicine, Chonnam National University Medical School & Chonnam National University Hwasun Hospital, Hwasun, South Korea
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24
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Kwak YG, Choi JY, Yoo HM, Lee SO, Kim HB, Han SH, Choi HJ, Kim SR, Kim TH, Chun HK, Koo HS. Validation of the Korean National Healthcare-associated Infections Surveillance System (KONIS): an intensive care unit module report. J Hosp Infect 2017; 96:377-384. [PMID: 28545827 DOI: 10.1016/j.jhin.2017.04.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [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: 01/25/2017] [Accepted: 04/04/2017] [Indexed: 11/27/2022]
Abstract
BACKGROUND National surveillance data should be validated to identify methodological problems within the surveillance programme and data quality issues. AIM To test the validity of healthcare-associated infection (HAI) rate data from the Korean National Healthcare-associated Infections Surveillance System (KONIS). METHODS Records from intensive care units of 12 (14.8%) of 81 participating hospitals for January-March 2014 were examined. The validation team reviewed 406 medical records of 110 patients with 114 reported HAIs - including 34 urinary tract infections (UTIs), 57 bloodstream infections (BSIs) and 23 cases of pneumonia (PNEU) - and 296 patients with no reported HAIs during one-day visits conducted in August and September 2014. The reviewers' diagnosis of HAI was regarded as the reference standard; in ambiguous cases, the KONIS Steering Committee confirmed the diagnosis of HAI. FINDINGS Sensitivity values for UTIs, BSIs and PNEU were 85.3%, 74.0% and 66.7%, and specificity values were 98.7%, 99.1% and 98.7%, respectively. Positive predictive values were 85.3%, 94.7% and 78.3%, and negative predictive values were 98.7%, 94.6% and 97.7%, respectively. Sensitivity for PNEU was lower than that for UTIs and BSIs. The hospitals participating in KONIS infrequently reported conditions that were not HAIs. Sensitivity for BSIs was lower in this study than in KONIS validation studies conducted in 2008 and 2010. CONCLUSIONS KONIS data are generally reliable; however, sensitivity for BSIs exhibited a decrease. This study shows the need for ongoing validation and continuous training of surveillance personnel to maintain the accuracy of surveillance data.
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Affiliation(s)
- Y G Kwak
- Department of Internal Medicine, Inje University Ilsan Paik Hospital, Goyang, South Korea.
| | - J Y Choi
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - H M Yoo
- Infection Control Office, Inje University Sanggye Paik Hospital, Seoul, South Korea
| | - S-O Lee
- Department of Infectious Diseases, Asan Medical Centre, University of Ulsan College of Medicine, Seoul, South Korea
| | - H B Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea
| | - S H Han
- Department of Nursing, Soonchunhyang University College of Medicine, Cheonan, South Korea
| | - H J Choi
- Department of Internal Medicine, Ewha Womans University School of Medicine, Seoul, South Korea
| | - S R Kim
- Infection Control Office, Korea University Guro Hospital, Seoul, South Korea
| | - T H Kim
- Department of Internal Medicine, Soonchunhyang University College of Medicine, Seoul, South Korea
| | - H K Chun
- Department of Infection Control, Kyunghee University Hospital, Seoul, South Korea
| | - H-S Koo
- Division of Infectious Disease Control, Korea Centres for Disease Control and Prevention, Osong, South Korea
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Paik ES, Choi HJ, Shim M, Kang H, Kim WY, Kim MK, Lee YY, Choi CH, Kim TJ, Lee JW, Kim BG, Bae DS. Comparison of Surgical Outcomes of Laparoscopy and Laparotomy for Secondary Cytoreductive Surgery with Localized Single Recurrent Site Epithelial Ovarian Cancer. J Minim Invasive Gynecol 2016. [DOI: 10.1016/j.jmig.2016.08.751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Kim G, Choi HJ, Kim HI, Kim J, Monllor-Satoca D, Kim M, Park H. Temperature-boosted photocatalytic H 2 production and charge transfer kinetics on TiO 2 under UV and visible light. Photochem Photobiol Sci 2016; 15:1247-1253. [PMID: 27714276 DOI: 10.1039/c6pp00263c] [Citation(s) in RCA: 16] [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: 11/21/2022]
Abstract
This study investigates the effect of reaction temperature (298-353 K) on photocatalytic H2 production in bare and platinized TiO2 (Pt/TiO2) suspensions containing various organic hole scavengers (EDTA, methanol, and formic acid) under UV (λ > 320 nm) and visible light (λ > 420 nm for ligand-to-metal charge transfer). H2 production rates are enhanced ∼7.8- and ∼2.5-fold in TiO2 and Pt/TiO2 suspensions, respectively, with EDTA under UV by simply elevating the reaction temperature from 298 K to 323 K (ΔT = 25 °C). Such a temperature-boosted increase in H2 production is always observed, regardless of the TiO2 crystalline structure (anatase, rutile, and an anatase/rutile mixture), type of hole scavenger, and irradiation wavelength range. It is estimated that approximately 90% of incident photons are utilized in H2 production, for which the activation energy is 25.5 kJ mol-1. Detailed photoelectrochemical analyses show the positive relationship between reaction temperature and photocurrent generation, with charge carrier mobility and interfacial charge transfer improving at higher temperatures. Other possible factors, such as H2 solubility and mass transport, play a limited role.
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Affiliation(s)
- Gonu Kim
- Department of Chemistry and Biology, Korea Science Academy of KAIST, Busan 47162, Korea
| | - Hee Joon Choi
- Taejon Christian International School, Daejeon 34035, Korea
| | - Hyoung-Il Kim
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06511, USA
| | - Jaehong Kim
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06511, USA
| | - Damián Monllor-Satoca
- Department of Analytical and Applied Chemistry, Institut Químic de Sarrià (IQS) - School of Engineering, Universitat Ramon Llull, Barcelona 08017, Spain
| | - Minju Kim
- School of Energy Engineering, Kyungpook National University, Daegu 41566, Korea. and School of Architectural, Civil, Environmental, and Energy Engineering, Kyungpook National University, Daegu 41566, Korea
| | - Hyunwoong Park
- School of Energy Engineering, Kyungpook National University, Daegu 41566, Korea. and School of Architectural, Civil, Environmental, and Energy Engineering, Kyungpook National University, Daegu 41566, Korea
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Abstract
Micron-sized colloidal spheres that are dispersed in an isotropic-nematic biphasic host suspension of charged rods (fd-virus particles) are shown to spontaneously form dimers, which exhibit a synchronized oscillatory motion. Dimer formation is not observed in the monophase of isotropic and nematic suspensions. The synchronized oscillations of dimers are connected to the inhomogeneous state of the host suspension of charged rods (fd viruses) where nematic domains are in coexistence with isotropic regions. The synchronization of oscillations occurs in bulk states, in the absence of an external field. With a low field strength of an applied electric field, the synchronization is rather reduced, but it recovers again when the field is turned off. In this Rapid Communication, we report this observation as an example of the strange attractor, occurring in the mixture of PS (polystyrene) dimers in an isotropic-nematic coexistence biphasic fd-virus network. Furthermore, we highlight that the synchronization of PS-dimer oscillations is the result of a global bifurcation diagram, driven by a delicate balance between the short-attractive "twisted" interaction of PS dimers and long-ranged electrostatic repulsive interactions of charged fd rods. The interest is then in the local enhancement of "twist-nematic" elasticity in reorientation of the dimer oscillations. An analysis of image-time correlations is provided with the data movies and Fourier transforms of averaged orientations for the synchronized oscillations of dimers in the biphasic I-N coexistence concentration of charged fd-virus suspensions.
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Affiliation(s)
- K Kang
- Forschungszentrum Jülich, Institute of Complex Systems, ICS-3, D-52425 Jülich, Germany
| | - S H Piao
- Department of Polymer Science and Engineering, Inha University, Inchoen 22212, South Korea
| | - H J Choi
- Department of Polymer Science and Engineering, Inha University, Inchoen 22212, South Korea
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Abstract
UNLABELLED The effects of diabetes medications on risk of fracture were investigated using the South Korea nationwide claims database. We demonstrated that the use of dipeptidyl peptidase-4 inhibitor could be associated with decreased risk of fracture. Thiazolidinedione use was associated with about 60 % increased risk of fracture in real clinical practice. INTRODUCTION The effects of diabetes medication on fracture have important clinical health consequences, since most diabetes patients are at high risk of fracture. We aimed to investigate the effect of diabetes medication on fracture risk. METHODS The nationwide medical claim database in South Korea was investigated. Among 2,886,555 subjects with antidiabetes prescriptions, 207,558 subjects aged 50 years and older, who initiated diabetes medication from 2008 to 2011, were analyzed. The subjects were classified based on diabetes medication classes: non-user (insufficient exposure), metformin (MET), sulfonylurea (SU), alpha-glucosidase inhibitor (AGI), MET + SU, MET + thiazolidinedione (TZD), MET + dipeptidyl peptidase-4 inhibitor (DPP4-I), and SU + TZD. RESULTS A total of 5996 fractures were observed. The fracture rate varied significantly across type of diabetes medications, with MET + DPP4-I combination group having the lowest rate and SU + TZD combination group having the highest rate. Compared to non-users, MET + DPP4-I inhibitor combination group had significantly reduced composite fracture risk (hazard ratio (HR) = 0.83, P = 0.025) and significantly reduced vertebral fracture risk (HR = 0.73, P = 0.013) in the unadjusted analysis. Compared to MET + SU users, MET + DPP4-I users showed a trend of lower non-vertebral fracture risk (HR = 0.82, P = 0.086) after adjusting for all confounding variables. Patients using TZD had significantly increased risk of fracture (HR = 1.59, P < 0.001) compared with patients not using TZDs adjusting for all confounding variables. CONCLUSIONS The results of this nationwide study showed a trend that DPP4 inhibitor might have a protective effect on bone metabolism compared with SU, when added to MET. Clinicians should take these results into consideration when prescribing diabetes medication, especially in elderly patients or those at high risk or fracture.
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Affiliation(s)
- H J Choi
- Department of Anatomy, Seoul National University College of Medicine, Seoul, South Korea
| | - C Park
- Division for Healthcare Technology Assessment Research, National Evidence-based Healthcare Collaborating Agency, Seoul, South Korea
| | - Y-K Lee
- Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Y-C Ha
- Department of Orthopaedic Surgery, Chung-Ang University Hospital, Seoul, South Korea
| | - S Jang
- College of Pharmacy Gachon University, Incheon, South Korea
| | - C S Shin
- Department of Internal Medicine, Seoul National University College of Medicine, 28 Yungun-Dong, Chongno-Gu, Seoul, 110-744, South Korea.
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Kim CJ, Choi WS, Jung Y, Kiem S, Seol HY, Woo HJ, Choi YH, Son JS, Kim KH, Kim YS, Kim ES, Park SH, Yoon JH, Choi SM, Lee H, Oh WS, Choi SY, Kim NJ, Choi JP, Park SY, Kim J, Jeong SJ, Lee KS, Jang HC, Rhee JY, Kim BN, Bang JH, Lee JH, Park S, Kim HY, Choi JK, Wi YM, Choi HJ. Surveillance of the Middle East respiratory syndrome (MERS) coronavirus (CoV) infection in healthcare workers after contact with confirmed MERS patients: incidence and risk factors of MERS-CoV seropositivity. Clin Microbiol Infect 2016; 22:880-886. [PMID: 27475739 PMCID: PMC7128923 DOI: 10.1016/j.cmi.2016.07.017] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 07/11/2016] [Accepted: 07/16/2016] [Indexed: 01/16/2023]
Abstract
Given the mode of transmission of Middle East respiratory syndrome (MERS), healthcare workers (HCWs) in contact with MERS patients are expected to be at risk of MERS infections. We evaluated the prevalence of MERS coronavirus (CoV) immunoglobulin (Ig) G in HCWs exposed to MERS patients and calculated the incidence of MERS-affected cases in HCWs. We enrolled HCWs from hospitals where confirmed MERS patients had visited. Serum was collected 4 to 6 weeks after the last contact with a confirmed MERS patient. We performed an enzyme-linked immunosorbent assay (ELISA) to screen for the presence of MERS-CoV IgG and an indirect immunofluorescence test (IIFT) to confirm MERS-CoV IgG. We used a questionnaire to collect information regarding the exposure. We calculated the incidence of MERS-affected cases by dividing the sum of PCR-confirmed and serology-confirmed cases by the number of exposed HCWs in participating hospitals. In total, 1169 HCWs in 31 hospitals had contact with 114 MERS patients, and among the HCWs, 15 were PCR-confirmed MERS cases in study hospitals. Serologic analysis was performed for 737 participants. ELISA was positive in five participants and borderline for seven. IIFT was positive for two (0.3%) of these 12 participants. Among the participants who did not use appropriate personal protective equipment (PPE), seropositivity was 0.7% (2/294) compared to 0% (0/443) in cases with appropriate PPE use. The incidence of MERS infection in HCWs was 1.5% (17/1169). The seroprevalence of MERS-CoV IgG among HCWs was higher among participants who did not use appropriate PPE.
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Affiliation(s)
- C-J Kim
- Department of Internal Medicine, Division of Infectious Diseases, Ewha Womans University School of Medicine, South Korea
| | - W S Choi
- Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, South Korea
| | - Y Jung
- Department of Internal Medicine, Konyang University Hospital, South Korea
| | - S Kiem
- Department of Internal Medicine, Inje University Haeundae Paik Hospital, South Korea
| | - H Y Seol
- Department of Internal Medicine, Good GangAn Hospital, South Korea
| | - H J Woo
- Department of Internal Medicine, Hallym University Dongtan Sacred Heart Hospital, South Korea
| | - Y H Choi
- Department of Internal Medicine, Ajou University Hospital, South Korea
| | - J S Son
- Department of Internal Medicine, Kyung Hee University Hospital at Gangdong, South Korea
| | - K-H Kim
- Department of Internal Medicine, Pusan National University Hospital, South Korea
| | - Y-S Kim
- Division of Infectious Diseases, Department of Internal Medicine, Chungnam National University School of Medicine, South Korea
| | - E S Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, South Korea
| | - S H Park
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Daejeon St. Mary's Hospital, South Korea
| | - J H Yoon
- Department of Internal Medicine, Eulji University Hospital, South Korea
| | - S-M Choi
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Yeouido St. Mary's Hospital, South Korea
| | - H Lee
- Division of Infectious Diseases, Dong-A University Hospital, South Korea
| | - W S Oh
- Department of Internal Medicine, Kangwon National University Hospital, South Korea
| | - S-Y Choi
- Department of Neurology, Dae Cheong Hospital, South Korea
| | - N-J Kim
- Department of Internal Medicine, Seoul National University Hospital, South Korea
| | - J-P Choi
- Department of Internal Medicine, Seoul Medical Center, South Korea
| | - S Y Park
- Department of Internal Medicine, Hallym University Kangdong Sacred Heart Hospital, South Korea
| | - J Kim
- Department of Internal Medicine, Hanyang University Guri Hospital, South Korea
| | - S J Jeong
- Department of Internal Medicine, Gangnam Severance Hospital, South Korea
| | - K S Lee
- Department of Internal Medicine, Myongji Hospital, South Korea
| | - H C Jang
- Department of Internal Medicine, Chonnam National University Hospital, South Korea
| | - J Y Rhee
- Department of Internal Medicine, Dankook University Hospital, South Korea
| | - B-N Kim
- Department of Internal Medicine, Inje University Sanggye Paik Hospital, South Korea
| | - J H Bang
- Department of Internal Medicine, Borame Medical Center, South Korea
| | - J H Lee
- Department of Internal Medicine, Wonkwang University Hospital, South Korea
| | - S Park
- Department of Family Medicine, Seobuk Hospital Seoul Metropolitan Government, South Korea
| | - H Y Kim
- Department of Internal Medicine, Wonju Severance Christian Hospital, South Korea
| | - J K Choi
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Bucheon St. Mary's Hospital, South Korea
| | - Y-M Wi
- Department of Internal Medicine, Samsung Changwon Hospital, South Korea
| | - H J Choi
- Department of Internal Medicine, Division of Infectious Diseases, Ewha Womans University School of Medicine, South Korea.
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Kang H, Choi HJ, Kang SW, Shin SE, Choi GS, Bae DH. Multi-functional magnesium alloys containing interstitial oxygen atoms. Sci Rep 2016; 6:23184. [PMID: 26976372 PMCID: PMC4791639 DOI: 10.1038/srep23184] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [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: 10/28/2015] [Accepted: 02/22/2016] [Indexed: 11/26/2022] Open
Abstract
A new class of magnesium alloys has been developed by dissolving large amounts of oxygen atoms into a magnesium lattice (Mg-O alloys). The oxygen atoms are supplied by decomposing titanium dioxide nanoparticles in a magnesium melt at 720 °C; the titanium is then completely separated out from the magnesium melt after solidification. The dissolved oxygen atoms are located at the octahedral sites of magnesium, which expand the magnesium lattice. These alloys possess ionic and metallic bonding characteristics, providing outstanding mechanical and functional properties. A Mg-O-Al casting alloy made in this fashion shows superior mechanical performance, chemical resistance to corrosion, and thermal conductivity. Furthermore, a similar Mg-O-Zn wrought alloy shows high elongation to failure (>50%) at room temperature, because the alloy plastically deforms with only multiple slips in the sub-micrometer grains (<300 nm) surrounding the larger grains (~15 μm). The metal/non-metal interstitial alloys are expected to open a new paradigm in commercial alloy design.
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Affiliation(s)
- H Kang
- Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong Seodaemun-gu, Seoul, 120-749, Korea
| | - H J Choi
- Department of Advanced Material Engineering, Kookmin University,77 Jeongneung-ro Seongbuk-gu, Seoul, 136-702, Korea
| | - S W Kang
- Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong Seodaemun-gu, Seoul, 120-749, Korea
| | - S E Shin
- Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong Seodaemun-gu, Seoul, 120-749, Korea
| | - G S Choi
- Gangwon Research Institute Technology Research Center, 290 Daejeon-dong, Gangneung, 210-340 Korea
| | - D H Bae
- Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong Seodaemun-gu, Seoul, 120-749, Korea
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31
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Kim JH, Choi HJ, Ku EJ, Hong AR, Kim KM, Kim SW, Cho NH, Shin CS. Regional body fat depots differently affect bone microarchitecture in postmenopausal Korean women. Osteoporos Int 2016; 27:1161-1168. [PMID: 26475286 DOI: 10.1007/s00198-015-3329-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 09/16/2015] [Indexed: 12/25/2022]
Abstract
SUMMARY In a prospective community-based cohort study, we investigated the relationship between trabecular bone score (TBS) and regional fat depots in 1474 Korean postmenopausal women. TBS was positively related with subcutaneous fat and negatively related with visceral fat. INTRODUCTION The effect of fat distribution (visceral/subcutaneous) on bone quality or microarchitecture has rarely been investigated due to measurement difficulty. We aimed to investigate the relationship between TBS reflecting bone microarchitecture and regional fat depots in Korean women. METHODS Cross-sectional data evaluation was made from subjects participating in an ongoing prospective community-based cohort study since 2001. A total of 1474 postmenopausal women in the Ansung cohort were analyzed. Regional body fat mass, bone mineral density (BMD) at the lumbar spine, and total hip and lumbar spine TBS were measured by dual energy X-ray absorptiometry (DXA). RESULTS In an age-adjusted partial correlation analysis, TBS was not associated with total fat mass, but negatively associated with trunk fat mass. However, TBS was positively related with leg (r = 0.102, P < 0.05) and gynoid fat mass (r = 0.086, P < 0.05) and negatively related with android fat mass (r = -0.106; P < 0.05). In linear regression models controlling age, BMI, and physical activity, android fat was inversely associated with TBS (β = -0.595, P < 0.001), whereas gynoid fat was positively associated with TBS (β = 0.216, P < 0.001). Lumbar spine and total hip BMDs revealed positive associations with total and all regional fat depots regardless of fat distribution. CONCLUSION Our findings suggest that relatively large visceral fat and small subcutaneous fat may have a detrimental effect on TBS, a bone microarchitecture index.
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Affiliation(s)
- J H Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea
| | - H J Choi
- Department of Anatomy, Seoul National University College of Medicine, Seoul, South Korea
| | - E J Ku
- Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju Si, South Korea
| | - A R Hong
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea
| | - K M Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - S W Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea
| | - N H Cho
- Department of Preventive Medicine, Ajou University School of Medicine, Suwon, South Korea.
| | - C S Shin
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea.
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32
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Cho J, Yi Y, Ahn TK, Choi HJ, Park CH, Chun DI, Lee JS, Lee WC. Failure to restore sagittal tibiotalar alignment in total ankle arthroplasty: Its relationship to the axis of the tibia and the positioning of the talar component. Bone Joint J 2016; 97-B:1525-32. [PMID: 26530656 DOI: 10.1302/0301-620x.97b11.33636] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The purpose of this study was to evaluate the change in sagittal tibiotalar alignment after total ankle arthroplasty (TAA) for osteoarthritis and to investigate factors affecting the restoration of alignment. This retrospective study included 119 patients (120 ankles) who underwent three component TAA using the Hintegra prosthesis. A total of 63 ankles had anterior displacement of the talus before surgery (group A), 49 had alignment in the normal range (group B), and eight had posterior displacement of the talus (group C). Ankles in group A were further sub-divided into those in whom normal alignment was restored following TAA (41 ankles) and those with persistent displacement (22 ankles). Radiographic and clinical results were assessed. Pre-operatively, the alignment in group A was significantly more varus than that in group B, and the posterior slope of the tibial plafond was greater (p < 0.01 in both cases). The posterior slope of the tibial component was strongly associated with restoration of alignment: ankles in which the alignment was restored had significantly less posterior slope (p < 0.001). An anteriorly translated talus was restored to a normal position after TAA in most patients. We suggest that surgeons performing TAA using the Hintegra prosthesis should aim to insert the tibial component at close to 90° relative to the axis of the tibia, hence reducing posterior soft-tissue tension and allowing restoration of normal tibiotalar alignment following surgery.
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Affiliation(s)
- J Cho
- Seoul Paik Hospital, No. 85 2-Ga, Jeo-Dong, Jung-Gu, Seoul, 100-032, Republic of Korea
| | | | - T K Ahn
- Bundang CHA Hospital, No. 351, Yatap-Dong, Bundang-Gu, Sungnam, Kyunggi-Do, 463-070, Republic of Korea
| | - H J Choi
- Haeundae Paik Hospital, No. 875, Haeundae-Ro, Haeundae-Gu, Busan, 612-896, Republic of Korea
| | - C H Park
- Yeung-Nam University Hospital, No. 170, Hyunchung-Ro, Nam-Gu, Daegu, 705-040, Republic of Korea
| | - D I Chun
- Soonchunhyang University Medical Center, No. 59, Daesagwan-Ro, Yongsan-Gu, Seoul, 140-743, Republic of Korea
| | - J S Lee
- Asan Medical Center, Pungnap 2(i)-dong Songpa-gu Seoul, Republic of Korea
| | - W C Lee
- Seoul Paik Hospital, No. 85 2-Ga, Jeo-Dong, Jung-Gu, Seoul, 100-032, Republic of Korea
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33
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Jais B, Rebours V, Malleo G, Salvia R, Fontana M, Maggino L, Bassi C, Manfredi R, Moran R, Lennon AM, Zaheer A, Wolfgang C, Hruban R, Marchegiani G, Fernández Del Castillo C, Brugge W, Ha Y, Kim MH, Oh D, Hirai I, Kimura W, Jang JY, Kim SW, Jung W, Kang H, Song SY, Kang CM, Lee WJ, Crippa S, Falconi M, Gomatos I, Neoptolemos J, Milanetto AC, Sperti C, Ricci C, Casadei R, Bissolati M, Balzano G, Frigerio I, Girelli R, Delhaye M, Bernier B, Wang H, Jang KT, Song DH, Huggett MT, Oppong KW, Pererva L, Kopchak KV, Del Chiaro M, Segersvard R, Lee LS, Conwell D, Osvaldt A, Campos V, Aguero Garcete G, Napoleon B, Matsumoto I, Shinzeki M, Bolado F, Fernandez JMU, Keane MG, Pereira SP, Acuna IA, Vaquero EC, Angiolini MR, Zerbi A, Tang J, Leong RW, Faccinetto A, Morana G, Petrone MC, Arcidiacono PG, Moon JH, Choi HJ, Gill RS, Pavey D, Ouaïssi M, Sastre B, Spandre M, De Angelis CG, Rios-Vives MA, Concepcion-Martin M, Ikeura T, Okazaki K, Frulloni L, Messina O, Lévy P. Serous cystic neoplasm of the pancreas: a multinational study of 2622 patients under the auspices of the International Association of Pancreatology and European Pancreatic Club (European Study Group on Cystic Tumors of the Pancreas). Gut 2016; 65:305-12. [PMID: 26045140 DOI: 10.1136/gutjnl-2015-309638] [Citation(s) in RCA: 173] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2015] [Accepted: 05/11/2015] [Indexed: 02/07/2023]
Abstract
OBJECTIVES Serous cystic neoplasm (SCN) is a cystic neoplasm of the pancreas whose natural history is poorly known. The purpose of the study was to attempt to describe the natural history of SCN, including the specific mortality. DESIGN Retrospective multinational study including SCN diagnosed between 1990 and 2014. RESULTS 2622 patients were included. Seventy-four per cent were women, and median age at diagnosis was 58 years (16-99). Patients presented with non-specific abdominal pain (27%), pancreaticobiliary symptoms (9%), diabetes mellitus (5%), other symptoms (4%) and/or were asymptomatic (61%). Fifty-two per cent of patients were operated on during the first year after diagnosis (median size: 40 mm (2-200)), 9% had resection beyond 1 year of follow-up (3 years (1-20), size at diagnosis: 25 mm (4-140)) and 39% had no surgery (3.6 years (1-23), 25.5 mm (1-200)). Surgical indications were (not exclusive) uncertain diagnosis (60%), symptoms (23%), size increase (12%), large size (6%) and adjacent organ compression (5%). In patients followed beyond 1 year (n=1271), size increased in 37% (growth rate: 4 mm/year), was stable in 57% and decreased in 6%. Three serous cystadenocarcinomas were recorded. Postoperative mortality was 0.6% (n=10), and SCN's related mortality was 0.1% (n=1). CONCLUSIONS After a 3-year follow-up, clinical relevant symptoms occurred in a very small proportion of patients and size slowly increased in less than half. Surgical treatment should be proposed only for diagnosis remaining uncertain after complete workup, significant and related symptoms or exceptionally when exists concern with malignancy. This study supports an initial conservative management in the majority of patients with SCN. TRIAL REGISTRATION NUMBER IRB 00006477.
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Affiliation(s)
- B Jais
- Department of Gastroenterology and Pancreatology, Beaujon Hospital, AP-HP, Clichy, France
| | - V Rebours
- Department of Gastroenterology and Pancreatology, Beaujon Hospital, AP-HP, Clichy, France
| | - G Malleo
- The Pancreas Institute, G.B. Rossi Hospital, University of Verona Hospital Trust, Verona, Italy
| | - R Salvia
- The Pancreas Institute, G.B. Rossi Hospital, University of Verona Hospital Trust, Verona, Italy
| | - M Fontana
- The Pancreas Institute, G.B. Rossi Hospital, University of Verona Hospital Trust, Verona, Italy
| | - L Maggino
- The Pancreas Institute, G.B. Rossi Hospital, University of Verona Hospital Trust, Verona, Italy
| | - C Bassi
- The Pancreas Institute, G.B. Rossi Hospital, University of Verona Hospital Trust, Verona, Italy
| | - R Manfredi
- The Pancreas Institute, G.B. Rossi Hospital, University of Verona Hospital Trust, Verona, Italy
| | - R Moran
- Division of Gastroenterology and Hepatology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA Division of Surgery, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA Department of Pathology, The Sol Goldman Pancreatic Cancer Research Center, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - A M Lennon
- Division of Gastroenterology and Hepatology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA Division of Surgery, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA Department of Pathology, The Sol Goldman Pancreatic Cancer Research Center, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - A Zaheer
- Division of Gastroenterology and Hepatology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA Division of Surgery, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA Department of Pathology, The Sol Goldman Pancreatic Cancer Research Center, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - C Wolfgang
- Division of Gastroenterology and Hepatology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA Division of Surgery, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA Department of Pathology, The Sol Goldman Pancreatic Cancer Research Center, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - R Hruban
- Division of Gastroenterology and Hepatology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA Division of Surgery, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA Department of Pathology, The Sol Goldman Pancreatic Cancer Research Center, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - G Marchegiani
- Departments of Surgery and Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - C Fernández Del Castillo
- Departments of Surgery and Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - W Brugge
- Departments of Surgery and Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Y Ha
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - M H Kim
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - D Oh
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - I Hirai
- First Department of Surgery, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - W Kimura
- First Department of Surgery, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - J Y Jang
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - S W Kim
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - W Jung
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - H Kang
- Division of Gastroenterology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - S Y Song
- Division of Gastroenterology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - C M Kang
- Department of Surgery, Yonsei University College of Medicine, Pancreaticobiliary Cancer Clinic, Yonsei Cancer Center, Severance Hospital, Seoul, Korea
| | - W J Lee
- Department of Surgery, Yonsei University College of Medicine, Pancreaticobiliary Cancer Clinic, Yonsei Cancer Center, Severance Hospital, Seoul, Korea
| | - S Crippa
- Pancreatic Surgery Unit, Department of Surgery, Polytechnic University of Marche Region, Ancona-Torrette, Italy
| | - M Falconi
- Pancreatic Surgery Unit, Department of Surgery, Polytechnic University of Marche Region, Ancona-Torrette, Italy
| | - I Gomatos
- NIHR Pancreas Biomedical Research Unit, Department of Molecular and Clinical Cancer Medicine, Royal Liverpool University Hospital, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - J Neoptolemos
- NIHR Pancreas Biomedical Research Unit, Department of Molecular and Clinical Cancer Medicine, Royal Liverpool University Hospital, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - A C Milanetto
- Department of Surgery, Oncology and Gastroenterology, 3rd Surgical Clinic, University of Padua, Padua, Italy
| | - C Sperti
- Department of Surgery, Oncology and Gastroenterology, 3rd Surgical Clinic, University of Padua, Padua, Italy
| | - C Ricci
- Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum-University of Bologna, S. Orsola-Malpighi Hospital, Bologna, Italy
| | - R Casadei
- Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum-University of Bologna, S. Orsola-Malpighi Hospital, Bologna, Italy
| | - M Bissolati
- Pancreatic Surgery Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - G Balzano
- Pancreatic Surgery Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - I Frigerio
- Hepato-Pancreato-Biliary Unit, Pederzoli Hospital, Peschiera del Garda, Italy
| | - R Girelli
- Hepato-Pancreato-Biliary Unit, Pederzoli Hospital, Peschiera del Garda, Italy
| | - M Delhaye
- Department of Gastroenterology, Hepatopancreatology and GI Oncology, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - B Bernier
- Department of Gastroenterology, Hepatopancreatology and GI Oncology, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - H Wang
- Institute of Hepatopancreatobiliary Surgery, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - K T Jang
- Department of Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - D H Song
- Department of Pathology, Gyeongsang National University School of Medicine, Jinju, Korea
| | - M T Huggett
- Hepato-Pancreato-Biliary Unit, Freeman Hospital, Newcastle upon Tyne, UK
| | - K W Oppong
- Hepato-Pancreato-Biliary Unit, Freeman Hospital, Newcastle upon Tyne, UK
| | - L Pererva
- National Institute of Surgery and Transplantology named after Shalimov, Kiev, Ukraine
| | - K V Kopchak
- National Institute of Surgery and Transplantology named after Shalimov, Kiev, Ukraine
| | - M Del Chiaro
- Division of Surgery, Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet at Center for Digestive Diseases, Karolinska University Hospital, Stockholm, Sweden
| | - R Segersvard
- Division of Surgery, Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet at Center for Digestive Diseases, Karolinska University Hospital, Stockholm, Sweden
| | - L S Lee
- Division of Gastroenterology, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - D Conwell
- Division of Gastroenterology, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - A Osvaldt
- Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - V Campos
- Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | - B Napoleon
- Hôpital Privé Mermoz, Gastroentérologie, Lyon, France
| | - I Matsumoto
- Division of Hepato-Biliary-Pancreatic Surgery, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - M Shinzeki
- Division of Hepato-Biliary-Pancreatic Surgery, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - F Bolado
- Gastroenterology Department, Hospital de Navarra, Pamplona, Spain
| | | | - M G Keane
- Department of Gastroenterology and Hepatology, University College Hospital, London, UK
| | - S P Pereira
- Department of Gastroenterology and Hepatology, University College Hospital, London, UK
| | - I Araujo Acuna
- Department of Gastroenterology, Hospital Clinic, CIBEREHD, IDIBAPS, University of Barcelona, Barcelona, Spain
| | - E C Vaquero
- Department of Gastroenterology, Hospital Clinic, CIBEREHD, IDIBAPS, University of Barcelona, Barcelona, Spain
| | - M R Angiolini
- Department of Pancreatic Surgery, Humanitas Research Hospital, Rozzano, Milan, Italy
| | - A Zerbi
- Department of Pancreatic Surgery, Humanitas Research Hospital, Rozzano, Milan, Italy
| | - J Tang
- Gastroenterology and Liver Services, Concord Hospital, Sydney, New South Wales, Australia
| | - R W Leong
- Gastroenterology and Liver Services, Concord Hospital, Sydney, New South Wales, Australia
| | - A Faccinetto
- Radiological Department, General Hospital Cá Foncello, Treviso, Italy
| | - G Morana
- Radiological Department, General Hospital Cá Foncello, Treviso, Italy
| | - M C Petrone
- Division of Gastroenterology and Gastrointestinal Endoscopy, San Raffaele Scientific Institute, Milan, Italy
| | - P G Arcidiacono
- Division of Gastroenterology and Gastrointestinal Endoscopy, San Raffaele Scientific Institute, Milan, Italy
| | - J H Moon
- Department of Internal Medicine, Digestive Disease Center and Research Institute, SoonChunHyang University School of Medicine, Bucheon, Korea
| | - H J Choi
- Department of Internal Medicine, Digestive Disease Center and Research Institute, SoonChunHyang University School of Medicine, Bucheon, Korea
| | - R S Gill
- Department of Gastroenterology, Bankstown-Lidcombe Hospital, Bankstown, New South Wales, Australia
| | - D Pavey
- Department of Gastroenterology, Bankstown-Lidcombe Hospital, Bankstown, New South Wales, Australia
| | - M Ouaïssi
- Department of Digestive Surgery, Timone Hospital, Marseille, France
| | - B Sastre
- Department of Digestive Surgery, Timone Hospital, Marseille, France
| | - M Spandre
- Gastrohepatology Department, San Giovanni Battista Molinette Hospital, University of Turin, Turin, Italy
| | - C G De Angelis
- Gastrohepatology Department, San Giovanni Battista Molinette Hospital, University of Turin, Turin, Italy
| | - M A Rios-Vives
- Gastroenterology Department, Hospital de la Santa Creu i Sant Pau, Institut de Reçerca-IIB Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - M Concepcion-Martin
- Gastroenterology Department, Hospital de la Santa Creu i Sant Pau, Institut de Reçerca-IIB Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - T Ikeura
- The Third Department of Internal Medicine, Division of Gastroenterology and Hepatology, Kansai Medical University, Osaka, Japan
| | - K Okazaki
- The Third Department of Internal Medicine, Division of Gastroenterology and Hepatology, Kansai Medical University, Osaka, Japan
| | - L Frulloni
- Department of Medicine, Pancreas Center, University of Verona, Verona, Italy
| | - O Messina
- Department of Medicine, Pancreas Center, University of Verona, Verona, Italy
| | - P Lévy
- Department of Gastroenterology and Pancreatology, Beaujon Hospital, AP-HP, Clichy, France
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Choi HJ, Adiyani L, Sung J, Choi JY, Kim HB, Kim YK, Kwak YG, Yoo H, Lee SO, Han SH, Kim SR, Kim TH, Lee HM, Chun HK, Kim JS, Yoo JD, Koo HS, Cho EH, Lee KW. Five-year decreased incidence of surgical site infections following gastrectomy and prosthetic joint replacement surgery through active surveillance by the Korean Nosocomial Infection Surveillance System. J Hosp Infect 2016; 93:339-46. [PMID: 26944901 DOI: 10.1016/j.jhin.2015.12.021] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 12/28/2015] [Indexed: 11/28/2022]
Abstract
BACKGROUND Surveillance of healthcare-associated infection has been associated with a reduction in surgical site infection (SSI). AIM To evaluate the Korean Nosocomial Infection Surveillance System (KONIS) in order to assess its effects on SSI since it was introduced. METHODS SSI data after gastrectomy, total hip arthroplasty (THA), and total knee arthroplasty (TKA) between 2008 and 2012 were analysed. The pooled incidence of SSI was calculated for each year; the same analyses were also conducted from hospitals that had participated in KONIS for at least three consecutive years. Standardized SSI rates for each year were calculated by adjusting for SSI risk factors. SSI trends were analysed using the Cochran-Armitage test. FINDINGS The SSI rate following gastrectomy was 3.12% (522/16,918). There was a significant trend of decreased crude SSI rates over five years. This trend was also evident in analysis of hospitals that had participated for more than three years. The SSI rate for THA was 2.05% (157/7656), which decreased significantly from 2008 to 2012. The risk factors for SSI after THA included the National Nosocomial Infections Surveillance risk index, trauma, reoperation, and age (60-69 years). The SSI rate for TKA was 1.90% (152/7648), which also decreased significantly during a period of five years. However, the risk-adjusted analysis of SSI did not show a significant decrease for all surgical procedures. CONCLUSION The SSI incidence of gastrectomy and prosthetic joint replacement declined over five years as a result of active surveillance by KONIS.
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Affiliation(s)
- H J Choi
- Department of Internal Medicine, Ewha Womans University School of Medicine, Seoul, South Korea.
| | - L Adiyani
- Department of Epidemiology and Institute of Environment and Health, Seoul National University, Seoul, South Korea
| | - J Sung
- Department of Epidemiology and Institute of Environment and Health, Seoul National University, Seoul, South Korea
| | - J Y Choi
- Department of Internal Medicine and AIDS Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - H B Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea
| | - Y K Kim
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, South Korea
| | - Y G Kwak
- Department of Internal Medicine, Inje University Ilsan Paik Hospital, Seoul, South Korea
| | - H Yoo
- Infection Control Office, Inje University Sanggye Paik Hospital, Seoul, South Korea
| | - Sang-Oh Lee
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - S H Han
- Department of Infection Prevention and Control, Soonchunhyang University Bucheon Hospital, Bucheon, South Korea
| | - S R Kim
- Infection Control Office, Korea University Guro Hospital, Seoul, South Korea
| | - T H Kim
- Department of Internal Medicine, Soonchunhyang University College of Medicine, Seoul, South Korea
| | - H M Lee
- Department of Laboratory Medicine, Kwandong University College of Medicine, Gangneung, South Korea
| | - H K Chun
- Department of Infection Control, Kyunghee University Hospital, Seoul, South Korea
| | - J-S Kim
- Department of Laboratory Medicine, Hallym University College of Medicine, Seoul, South Korea
| | - J D Yoo
- Department of Orthopedic Surgery, Ewha Woman's University School of Medicine, Seoul, South Korea
| | - H-S Koo
- Division of Infectious Disease Control, Korean Centers for Disease Control and Prevention, Osong, South Korea
| | - E H Cho
- Division of Infectious Disease Control, Korean Centers for Disease Control and Prevention, Osong, South Korea
| | - K W Lee
- Department of Laboratory Medicine and Research Institute of Bacterial Resistance, Yonsei University College of Medicine, Wonju, South Korea
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Choi JY, Kwak YG, Yoo H, Lee SO, Kim HB, Han SH, Choi HJ, Kim HY, Kim SR, Kim TH, Lee H, Chun HK, Kim JS, Eun BW, Kim DW, Koo HS, Cho EH, Lee K. Trends in the distribution and antimicrobial susceptibility of causative pathogens of device-associated infection in Korean intensive care units from 2006 to 2013: results from the Korean Nosocomial Infections Surveillance System (KONIS). J Hosp Infect 2016; 92:363-71. [PMID: 26876746 DOI: 10.1016/j.jhin.2015.12.012] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Accepted: 12/16/2015] [Indexed: 10/22/2022]
Abstract
BACKGROUND For all countries, information on pathogens causing healthcare-associated infections is important in order to develop proper strategies for preventing and treating nosocomial infections. AIM To assess the change in frequencies and antimicrobial resistance of pathogens causing device-associated infections (DAIs) in intensive care units (ICUs) in South Korea between July 2006 and June 2014. METHODS Data from the Korean Nosocomial Infections Surveillance System (KONIS) were analysed, including three major DAI types in ICUs. FINDINGS The frequency of Gram-negative bacteria gradually increased for central line-associated bloodstream infection (CLABSI) and ventilator-associated pneumonia (VAP) (from 24.6% to 32.6% and from 52.8% to 73.5%, respectively). By contrast, the frequency of Gram-positive bacteria decreased from 58.6% to 49.2% for CLABSI, and from 44.3% to 23.8% for VAP (P < 0.001). Staphylococcus aureus was the most frequent causative pathogen in CLABSI throughout the surveillance period, but for VAP was replaced as the most frequent pathogen by Acinetobacter baumannii as of 2010. Candida albicans was the most frequent pathogen for catheter-associated urinary tract infection. The meticillin resistance rate in S. aureus decreased from 95% to 90.2% (P < 0.001); amikacin resistance in Klebsiella pneumoniae and Escherichia coli decreased from 43.8% to 14.7% and from 15.0% to 1.8%, respectively (P < 0.001); imipenem resistance in A. baumannii increased from 52.9% to 89.8% (P < 0.001). CONCLUSION The proportion of Gram-negative bacteria as nosocomial pathogens for CLABSI and VAP has increased. The prevalence of A. baumannii causing DAIs in Korean ICUs has increased rapidly, as has the rate of carbapenem resistance in these bacteria.
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Affiliation(s)
- J Y Choi
- Department of Internal Medicine and AIDS Research Institute, Yonsei University College of Medicine, Seoul, South Korea.
| | - Y G Kwak
- Department of Internal Medicine, Inje University Ilsan Paik Hospital, Goyang, South Korea
| | - H Yoo
- Infection Control Office, Inje University Sanggye Paik Hospital, Seoul, South Korea
| | - S-O Lee
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - H B Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea
| | - S H Han
- Department of Infection Prevention and Control, Soonchunhyang University Bucheon Hospital, Bucheon, South Korea
| | - H J Choi
- Department of Internal Medicine, Ewha Woman's University School of Medicine, Seoul, South Korea
| | - H Y Kim
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, South Korea
| | - S R Kim
- Infection Control Office, Korea University Guro Hospital, Seoul, South Korea
| | - T H Kim
- Department of Internal Medicine, Soonchunhyang University College of Medicine, Seoul, South Korea
| | - H Lee
- Department of Laboratory Medicine, Kwandong University College of Medicine, Gangneung, South Korea
| | - H K Chun
- Department of Infection Control, Kyunghee University Hospital, Seoul, South Korea
| | - J-S Kim
- Department of Laboratory Medicine, Hallym University College of Medicine, Seoul, South Korea
| | - B W Eun
- Department of Pediatrics, Eulji University School of Medicine, Eulji General Hospital, Seoul, South Korea
| | - D W Kim
- Department of Policy Research Affairs, National Health Insurance Service Ilsan Hospital, Ilsan, South Korea
| | - H-S Koo
- Division of Infectious Disease Control, Korea Centers for Disease Control and Prevention, Osong, South Korea
| | - E-H Cho
- Division of Epidemic Intelligence Service, Korea Centers for Disease Control and Prevention, Osong, South Korea
| | - K Lee
- Department of Laboratory Medicine and Research Institute of Bacterial Resistance, Yonsei University College of Medicine, Seoul, South Korea
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Abstract
OBJECTIVE We aimed to investigate the association between metabolic syndrome (MS) and hearing impairment (HI) using nationally representative data from Korean adults. DESIGN, SETTING AND PARTICIPANTS A total of 16,799 subjects (≥19 years old; 7,170 men and 9,629 women) who underwent pure tone audiometry testing were included in the analysis. Data were obtained from the fifth Korea National Health and Nutrition Examination Survey (2010-2012). Subjects were divided into two groups according to the presence of MS. RESULTS Among the subjects with MS, 47% had HI. Logistic regression analysis revealed that MS was not an independent risk factor for HI, although increased fasting plasma glucose (OR 1·4, 95% CI: 1·1-1·8) was independently associated with HI. In addition, older age, male sex, very low body mass index (≤17·5 kg/m2), lower education level, smoking history, and occupational noise exposure were independently associated with HI. For low-frequency HI, independent risk factors included older age, lower educational level, lower economic status, and very low BMI (≤17·5 kg/m2). For high-frequency HI, independent risk factors included older age, male sex, lower educational level, lower economic status, increased blood pressure, lower high-density lipoprotein cholesterol, and smoking history. CONCLUSIONS MS itself was not an independent risk factor for HI, and, among the individual metabolic components, only increased fasting plasma glucose was independently associated with HI.
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Affiliation(s)
- H Y Lee
- Ho Yun Lee, MD, PhD, Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Eulji University, Dunsan-seoro 95, Daejeon 302-799, Korea, Tel: 82-42-611-3133, Fax: 82-42-611-3136, E-mail:
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Choi HJ, Kim JY, Lim SC, Kim G, Yun HJ, Choi HS. Dipeptidyl peptidase 4 promotes epithelial cell transformation and breast tumourigenesis via induction of PIN1 gene expression. Br J Pharmacol 2015; 172:5096-109. [PMID: 26267432 PMCID: PMC4687806 DOI: 10.1111/bph.13274] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [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: 12/18/2014] [Revised: 06/19/2015] [Accepted: 07/10/2015] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND AND PURPOSE Dipeptidyl peptidase 4 (DPP4) is an aminopeptidase that is widely expressed in different cell types. Recent studies suggested that DPP4 plays an important role in tumour progression in several human malignancies. Here we have examined the mechanisms by which up-regulation of DPP4 expression causes epithelial transformation and mammary tumourigenesis. EXPERIMENTAL APPROACH Expression of DPP4 and the peptidylprolyl cis/trans isomerase, NIMA-interacting 1 (PIN1), and the cytotoxic effects of combined treatment with sitagliptin and juglone were investigated by immunohistochemistry, immunoblotting, real-time PCR, TUNEL and soft agar assays, using MCF7 cells. The effects of sitagliptin on tumour development in vivo were studied in the syngeneic 4T1 metastatic breast cancer model. KEY RESULTS Activity of the transcription factor E2F1 induced by EGF was enhanced by DPP4, thus increasing PIN1 expression. Furthermore, DPP4 enhanced MEK/ERK and JNK/c-Jun signalling induced by EGF, inducing AP-1 activity and epithelial cell transformation. In contrast, DPP4 silencing or DPP4 inhibition in MCF7 cells inhibited PIN1 expression via E2F1 activity induced by EGF, decreasing colony formation and inducing DNA fragmentation. In the syngeneic 4T1 metastatic breast cancer model, DPP4 overexpression increased tumour development, whereas treatment with sitagliptin and/or juglone suppressed it. Consistent with these observations, DPP4 levels were positively correlated with PIN1 expression in human breast cancer. CONCLUSIONS AND IMPLICATIONS DPP4 promoted EGF-induced epithelial cell transformation and mammary tumourigenesis via induction of PIN1 expression, suggesting that sitagliptin targeting of DPP4 could be a treatment strategy in patients with breast cancer.
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Affiliation(s)
- H J Choi
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - J Y Kim
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - S-C Lim
- Department of Pathology, School of Medicine, Chosun University, Gwangju, South Korea
| | - G Kim
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - H J Yun
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - H S Choi
- College of Pharmacy, Chosun University, Gwangju, South Korea
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Lim BR, Choi HJ, Kwon GS, Joo WH. Enhancement of solvent tolerance in Pseudomonas sp. BCNU 106 with trehalose. Lett Appl Microbiol 2015; 61:607-12. [PMID: 26433128 DOI: 10.1111/lam.12504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 09/15/2015] [Accepted: 09/24/2015] [Indexed: 11/28/2022]
Abstract
UNLABELLED As the solvent hyper-resistant Pseudomonas sp. BCNU 106 experiences limited growth with solvents, a strategy is therefore needed to allow better growth to broaden its performance in biotechnological applications. Pseudomonas sp. BCNU 106 was cultivated in a medium supplemented with 0·05 mol l(-1) trehalose, and the cell survival was observed during subsequent growth with 1% (v/v) toluene. Exogenously added trehalose was transported into the cells and conferred protection against toluene stress. BCNU 106 grown in the presence of exogenous trehalose showed higher solvent tolerance, it can thus have more potential for biotransformation and biodegradation. SIGNIFICANCE AND IMPACT OF THE STUDY This study shows that exogenously supplemented trehalose confers protection against toluene stress and enhances the bacterial cell growth in the presence of toluene. This is of importance to the mass cultivation of solvent-tolerant bacteria, where some of the growth-related limitations of solvent-tolerant bacteria can be overcome, and their performance in biotechnological applications for biotransformation and biodegradation broadened.
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Affiliation(s)
- B R Lim
- Department of Biology and Chemistry, Changwon National University, Changwon, Korea
| | - H J Choi
- Department of Biology and Chemistry, Changwon National University, Changwon, Korea
| | - G-S Kwon
- Department of Bioresource Sciences, Andong National University, Andong, Korea
| | - W H Joo
- Department of Biology and Chemistry, Changwon National University, Changwon, Korea
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Choi HJ, Lee JC, Lee YM. Hourglass epidermoid inclusion cyst of the hand. J Hand Surg Eur Vol 2015; 40:749-50. [PMID: 24212414 DOI: 10.1177/1753193413511576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- H J Choi
- Department of Plastic and Reconstructive Surgery, College of Medicine, Soonchunhyang University, Cheonan, Korea
| | - J C Lee
- Department of Plastic and Reconstructive Surgery, College of Medicine, Soonchunhyang University, Cheonan, Korea
| | - Y M Lee
- Department of Plastic and Reconstructive Surgery, College of Medicine, Soonchunhyang University, Cheonan, Korea
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40
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Park KR, Seo MR, Ryu HJ, Chi MJ, Baek HJ, Choi HJ. Acquired enophthalmos with systemic lupus erythematosus. Lupus 2015; 25:88-92. [PMID: 26306741 DOI: 10.1177/0961203315600245] [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: 06/10/2015] [Accepted: 07/08/2015] [Indexed: 11/15/2022]
Abstract
Ocular involvement sometimes occurs with systemic lupus erythematosus (SLE) but enophthalmos with SLE is rare. We report a case of enophthalmos with SLE. A 25-year-old male was admitted for two weeks of fever, sore throat, arthralgia, chest pain and right arm weakness with pain. We diagnosed him with SLE with malar rash, arthritis, pleural effusion, proteinuria, leukopenia, positive antinuclear antibody, anti-dsDNA, and lupus anticoagulant. The patient was prescribed high-dose prednisolone and hydroxychloroquine 400 mg. One week after discharge, he complained about a sensation of a sunken right eye. CT showed right enophthalmos, a post-inflammatory change and chronic inflammation. Proteinuria increased to 3.8 g/day after the patient stopped taking prednisolone. Cyclophosphamide therapy was administered for three months without improvement. We decided to restart prednisolone and change cyclophosphamide to mycophenolate mofetil. Proteinuria decreased but enophthalmos remains as of this reporting.
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Affiliation(s)
- K R Park
- Gachon University GiI Hospital, Department of Rheumatology, Incheon, the Republic of Korea
| | - M R Seo
- Gachon University GiI Hospital, Department of Rheumatology, Incheon, the Republic of Korea
| | - H J Ryu
- Gachon University GiI Hospital, Department of Rheumatology, Incheon, the Republic of Korea
| | - M J Chi
- Gachon University Gil Hospital, Department of Ophthalmology, Incheon, the Republic of Korea
| | - H J Baek
- Gachon University GiI Hospital, Department of Rheumatology, Incheon, the Republic of Korea
| | - H J Choi
- Gachon University GiI Hospital, Department of Rheumatology, Incheon, the Republic of Korea
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Choi HJ, Kim JY, Lim SC, Kim G, Yun HJ, Choi HS. Dipeptidyl peptidase 4 promotes epithelial cell transformation and breast tumourigenesis via induction of PIN1 gene expression. Br J Pharmacol 2015. [PMID: 26267432 DOI: 10.1111/bph.13274.] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND AND PURPOSE Dipeptidyl peptidase 4 (DPP4) is an aminopeptidase that is widely expressed in different cell types. Recent studies suggested that DPP4 plays an important role in tumour progression in several human malignancies. Here we have examined the mechanisms by which up-regulation of DPP4 expression causes epithelial transformation and mammary tumourigenesis. EXPERIMENTAL APPROACH Expression of DPP4 and the peptidylprolyl cis/trans isomerase, NIMA-interacting 1 (PIN1), and the cytotoxic effects of combined treatment with sitagliptin and juglone were investigated by immunohistochemistry, immunoblotting, real-time PCR, TUNEL and soft agar assays, using MCF7 cells. The effects of sitagliptin on tumour development in vivo were studied in the syngeneic 4T1 metastatic breast cancer model. KEY RESULTS Activity of the transcription factor E2F1 induced by EGF was enhanced by DPP4, thus increasing PIN1 expression. Furthermore, DPP4 enhanced MEK/ERK and JNK/c-Jun signalling induced by EGF, inducing AP-1 activity and epithelial cell transformation. In contrast, DPP4 silencing or DPP4 inhibition in MCF7 cells inhibited PIN1 expression via E2F1 activity induced by EGF, decreasing colony formation and inducing DNA fragmentation. In the syngeneic 4T1 metastatic breast cancer model, DPP4 overexpression increased tumour development, whereas treatment with sitagliptin and/or juglone suppressed it. Consistent with these observations, DPP4 levels were positively correlated with PIN1 expression in human breast cancer. CONCLUSIONS AND IMPLICATIONS DPP4 promoted EGF-induced epithelial cell transformation and mammary tumourigenesis via induction of PIN1 expression, suggesting that sitagliptin targeting of DPP4 could be a treatment strategy in patients with breast cancer.
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Affiliation(s)
- H J Choi
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - J Y Kim
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - S-C Lim
- Department of Pathology, School of Medicine, Chosun University, Gwangju, South Korea
| | - G Kim
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - H J Yun
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - H S Choi
- College of Pharmacy, Chosun University, Gwangju, South Korea
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Jeon KS, Sung JH, Lee MW, Song HY, Lee EA, Kim SO, Choi HJ, Shin HY, Park WH, Jang YI, Kang MG, Choi YH, Lee JS, Ko DH, Ryu HY. Comparison of Strain in GaN-Based Blue Light-Emitting Diode Grown on Silicon(111) and Sapphire Substrates. J Nanosci Nanotechnol 2015; 15:5264-5266. [PMID: 26373120 DOI: 10.1166/jnn.2015.10408] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We compare the strain states and device performances of GaN-based blue light-emitting diodes (LEDs) grown on Si(111) and sapphire substrates. The strain characteristics are investigated using micro-Raman spectroscopy and high-resolution transmission electron microscopy. These analyses reveal that GaN layer grown on Si has a residual tensile strain in contrast to a compressive strain for GaN on sapphire, and quantum wells (QWs) on GaN/Si experience reduced lattice mismatch than those of GaN/sapphire. When external quantum efficiencies of LED on sapphire and Si substrates are compared, the LED on Si shows better efficiency droop characteristics and this is attributed to a decrease in piezo-electric field strength in InGaN/GaN layers owing to reduced lattice mismatch.
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Choi JY, Kwak YG, Yoo H, Lee SO, Kim HB, Han SH, Choi HJ, Kim YK, Kim SR, Kim TH, Lee H, Chun HK, Kim JS, Eun BW, Kim DW, Koo HS, Bae GR, Lee K. Trends in the incidence rate of device-associated infections in intensive care units after the establishment of the Korean Nosocomial Infections Surveillance System. J Hosp Infect 2015; 91:28-34. [PMID: 26149593 DOI: 10.1016/j.jhin.2015.06.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Accepted: 02/02/2015] [Indexed: 11/27/2022]
Abstract
BACKGROUND The effectiveness of continuous nationwide surveillance on healthcare-associated infections should be investigated in each country. AIM To assess the rate of device-associated infections (DAIs) in intensive care units (ICUs) since the establishment of the Korean Nosocomial Infections Surveillance System (KONIS). METHODS Nationwide data were obtained on the incidence rate of DAI in ICUs reported to KONIS by all participating hospitals. The three major DAIs were studied: ventilator-associated pneumonia (VAP), central line-associated bloodstream infection (CABSI), and catheter-associated urinary tract infection (CAUTI). The pooled and year-wise incidence rates (cases per 1000 device-days) of these DAIs were determined for the period 2006 and 2012. In addition, data from institutions that had participated in KONIS for at least three consecutive years were analysed separately. FINDINGS The number of ICUs participating in KONIS gradually increased from 76 in 2006 to 162 in 2012. Between 2006 and 2012, the incidence rate per 1000 device-days for VAP decreased significantly from 3.48 to 1.64 (F = 11, P < 0.01), for CAUTI the rate decreased non-significantly from 1.85 to 1.26 (F = 2.02, P = 0.07), and for CABSI the rate also decreased non-significantly from 3.4 to 2.57 (F = 1.73, P = 0.12). In the 132 ICUs that had participated in KONIS for at least three consecutive years, the VAP rate significantly decreased from the first year to third year (F = 20.57, P < 0.01), but the rates of CAUTI (F = 1.06, P = 0.35) and CABSI (F = 1.39, P = 0.25) did not change significantly. CONCLUSION The decreased incidence rate of VAP in ICUs in Korea might be associated with the continuous prospective surveillance provided by KONIS.
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Affiliation(s)
- J Y Choi
- Department of Internal Medicine and AIDS Research Institute, Yonsei University College of Medicine, Seoul, South Korea.
| | - Y G Kwak
- Department of Internal Medicine, Inje University Ilsan Paik Hospital, Goyang, South Korea
| | - H Yoo
- Infection Control Office, Inje University Sanggye Paik Hospital, Seoul, South Korea
| | - S-O Lee
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - H B Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea
| | - S H Han
- Department of Infection Prevention and Control, Soonchunhyang University Bucheon Hospital, Bucheon, South Korea
| | - H J Choi
- Department of Internal Medicine, Ewha Womans University School of Medicine, Seoul, South Korea
| | - Y K Kim
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, South Korea
| | - S R Kim
- Infection Control Office, Korea University Guro Hospital, Seoul, South Korea
| | - T H Kim
- Department of Internal Medicine, Soonchunhyang University College of Medicine, Seoul, South Korea
| | - H Lee
- Department of Laboratory Medicine, Kwandong University College of Medicine, Gangneung, South Korea
| | - H K Chun
- Department of Infection Control, Kyunghee University Hospital, Seoul, South Korea
| | - J-S Kim
- Department of Laboratory Medicine, Hallym University College of Medicine, Seoul, South Korea
| | - B W Eun
- Department of Pediatrics, Eulji University School of Medicine, Eulji General Hospital, Seoul, South Korea
| | - D W Kim
- Department of Policy Research Affairs, National Health Insurance Service Ilsan Hospital, Ilsan, South Korea
| | - H-S Koo
- Division of Infectious Disease Control, Korea Centers for Disease Control & Prevention, Osong, South Korea
| | - G-R Bae
- Division of Epidemic Intelligence Service, Korea Centers for Disease Control and Prevention, Osong, South Korea
| | - K Lee
- Department of Laboratory Medicine and Research Institute of Bacterial Resistance, Yonsei University College of Medicine, Seoul, South Korea
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Choi HJ, Lee JJ, Kim DH, Kim MK, Lee HJ, Ko AY, Kang HJ, Park C, Wee WR. Blockade of CD40-CD154 costimulatory pathway promotes long-term survival of full-thickness porcine corneal grafts in nonhuman primates: clinically applicable xenocorneal transplantation. Am J Transplant 2015; 15:628-41. [PMID: 25676390 DOI: 10.1111/ajt.13057] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 10/10/2014] [Accepted: 10/11/2014] [Indexed: 01/25/2023]
Abstract
The porcine cornea may be a good solution for the shortage of human donor corneas because its size and refractive properties are comparable to those of the human cornea. However, antigenic differences need to be overcome to apply xenocorneal transplantation in actual clinical practice. We aimed to investigate the feasibility of full-thickness porcine corneas as human corneal substitutes using a CD40-CD154 costimulatory pathway blocking strategy in a clinically applicable pig-to-nonhuman primate corneal transplantation model. As a result, the mean survival time of the xenocorneal grafts in recipients who received anti-CD154 antibody-based immunosuppressants (POD318 (n = 4); >933, >243, 318 and >192) was significantly longer than that in controls (POD28 (n = 3); 21, 28 and 29; p = 0.010, log-rank test). Administration of anti-CD154 antibodies markedly reduced inflammatory cellular infiltrations (predominantly CD8 T cells and macrophages) into the xenocorneal grafts and almost completely blocked xenoantigen-triggered increases in Th1-associated cytokines, chemokines and C3a in the aqueous humor. Moreover, systemic expansion of memory T cells was effectively controlled and responses of anti-Gal/donor pig-specific antibodies were considerably diminished by programmed injection of anti-CD154 antibodies. Consequently, porcine corneas might be promising human corneal substitutes when the transplantation is accompanied by potent immunosuppression such as a CD40-CD154 costimulatory pathway blockade.
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Affiliation(s)
- H J Choi
- Department of Ophthalmology, Seoul National University Hospital Healthcare System Gangnam Center, Seoul, Republic of Korea; Department of Ophthalmology, Seoul National University College of Medicine, Seoul, Republic of Korea; Laboratory of Ocular Regenerative Medicine and Immunology, Seoul Artificial Eye Center, Seoul National University Hospital Biomedical Research Institute, Seoul, Republic of Korea; Translational Xenotransplantation Research Center, Seoul National University College of Medicine and Seoul National University Hospital Biomedical Research Institute, Seoul, Republic of Korea
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Kim SH, Ha YE, Youn JC, Park JS, Sung H, Kim MN, Choi HJ, Lee YJ, Kang SM, Ahn JY, Choi JY, Kim YJ, Lee SK, Kim SJ, Peck KR, Lee SO, Kim YH, Hwang S, Lee SG, Ha J, Han DJ. Fatal scedosporiosis in multiple solid organ allografts transmitted from a nearly-drowned donor. Am J Transplant 2015; 15:833-40. [PMID: 25639881 DOI: 10.1111/ajt.13008] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [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: 06/27/2014] [Revised: 09/05/2014] [Accepted: 09/11/2014] [Indexed: 01/25/2023]
Abstract
Scedosporium spp. is the most common mold infection in pneumonia resulting from near-drowning. Three fatal scedosporiosis cases developed after solid organ transplantation, probably transmitted from the nearly-drowned donor. One heart transplant recipient and two kidney transplant recipients developed fatal scedosporiosis following deceased donor transplantation from the same donor, a nearly-drowned victim of a suicide attempt. Genotypically, indistinguishable strains of Scedosporium auratiacum were recovered from the three recipients. Two liver transplant recipients from the same donor received prophylactic voriconazole without any subsequent signs of infection. To determine the safety of donation from nearly-drowned donors, a national traceback investigation was also performed of the causes of deaths in all transplant recipients who received organs from drowned donors between 2001 and 2013. Over 13 years, 2600 deceased donor transplants were performed in Korea. Among these 2600 deceased donor transplants, 27 (1%) victims of drowning donated their organs. From these 27 donors, 84 patients received organ transplants and 18 died, including the above three. We found no microbiologic evidence of invasive mold transmission from the nearly-drowned donors to the other 15 recipients. Although disseminated infection in the donor could not be demonstrated by culture, undiagnosed disseminated donor infection and transmission of Scedosporium spp. should be considered in near-drowning events.
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Affiliation(s)
- S-H Kim
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
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Venmathi Maran BA, Oh SY, Choi HJ, Myoung JG. Seasonal occurrence and habitat of two pennellids (Copepoda, Siphonostomatoida) infecting marine ranched black scraper and Korean rockfish in Korea. Trop Biomed 2014; 31:362-369. [PMID: 25134906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The seasonal occurrence and habitat of two parasitic copepods, Peniculus minuticaudae (Shiino, 1956) and Peniculus truncatus (Shiino, 1956) (Siphonostomatoida, Pennellidae) infecting the fins of black scraper Thamnaconus modestus and Korean rockfish Sebastes schlegelii, respectively were investigated. The fishes were collected from Tongyeong marine living resources research and conservation center, southern coast of Korea as five per month for two years from July 2011 to June 2013. In total, 391 copepods of P. minuticaudae were collected in two years, in contrast to P. truncatus. Prevalence was 85%, mean intensity was 3.25, and maximum intensity was 33. Season wise, the infestation was observed as the highest in autumn (September-November) season, and the lowest in winter (December- February). It was infested only on fins of black scrapers. Abundance of P. minuticaudae was found on the pectoral fin (43.5%), followed by anal (22.5%), second dorsal (20.5%) and caudal fins (13.5%). Statistically significant interactions were observed between season, infestation and infected regions (P<0.001). It is also reported for the first time in Korea from the fins of wild threadsail filefish Stephanolepis cirrhifer from Busan, Jeju, Tongyeong and Yeosu fish markets. It can be a new record on its host and localities. A total of 51 P. truncatus were collected with the prevalence of 37.5%, mean intensity of 0.37 and maximum intensity of 6. Season wise, infestation was observed as the highest in summer (June-August), and the lowest in winter. Attachment site was the dorsal fin and not found from any other fins of rockfish. Statistically significant interaction was observed between season and infestation (P<0.05). This is the first report on the ecology of these two pennellids.
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Affiliation(s)
- B A Venmathi Maran
- Marine Ecosystem Research Division, Korea Institute of Ocean Science & Technology, 787, Haean lo, Ansan 426-744, Seoul, Korea
| | - S Y Oh
- Marine Ecosystem Research Division, Korea Institute of Ocean Science & Technology, 787, Haean lo, Ansan 426-744, Seoul, Korea
| | - H J Choi
- Marine Ecosystem Research Division, Korea Institute of Ocean Science & Technology, 787, Haean lo, Ansan 426-744, Seoul, Korea
| | - J G Myoung
- Marine Ecosystem Research Division, Korea Institute of Ocean Science & Technology, 787, Haean lo, Ansan 426-744, Seoul, Korea
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Konieczka K, Choi HJ, Koch S, Schoetzau A, Küenzi D, Kim DM. Frequency of symptoms and signs of primary vascular dysregulation in Swiss and Korean populations. Klin Monbl Augenheilkd 2014; 231:344-7. [PMID: 24771164 DOI: 10.1055/s-0034-1368239] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND Primary vascular dysregulation syndrome (also called Flammer syndrome) is related to certain eye diseases, particularly normal tension glaucoma. Primary vascular dysregulation is characterized by a number of symptoms and signs (e.g., cold hands and/or feet, low blood pressure), that occur more frequently in subjects with primary vascular dysregulation compared to the general population. The aim of the present study was to test and compare the relative frequency of symptoms and signs related to primary vascular dysregulation in unselected populations in Switzerland and Korea. SUBJECTS AND METHODS Swiss (n=259) and Korean (n=1116) subjects filled out our questionnaire containing 15 questions related to symptoms and signs of primary vascular dysregulation. RESULTS In the populations studied, seven of 15 symptoms and signs of primary vascular dysregulation (increased smell perception, increased pain sensation, increased response to certain drugs, low body mass index, feeling cold, cold hands and/or feet, and headaches) occurred significantly more often in the Swiss population than in the Korean population, whereas five symptoms and signs (reversible skin blotches, tendency toward perfectionism, long sleep onset time, tinnitus, and dizziness) occurred significantly more often in the Korean population. CONCLUSION The relative frequency of these symptoms and signs of primary vascular dysregulation in an unselected average population differs between Switzerland and Korea. Therefore, if a diagnosis of primary vascular dysregulation is based on the self-reported symptoms and signs of the patient, they must be compared with the frequency of symptoms and signs in the corresponding local population.
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Affiliation(s)
- K Konieczka
- University of Basel, Department of Ophthalmology, Switzerland (Chairman ad interim: Dr. Norbert Spirig)
| | - H J Choi
- Department of Ophthalmology, Seoul National University Hospital Healthcare System Gangnam Center, Seoul, Korea (Chairman: Prof. Sang-Heon Cho)
| | - S Koch
- University of Basel, Department of Ophthalmology, Switzerland (Chairman ad interim: Dr. Norbert Spirig)
| | - A Schoetzau
- University of Basel, Department of Ophthalmology, Switzerland (Chairman ad interim: Dr. Norbert Spirig)
| | - D Küenzi
- University of Basel, Department of Ophthalmology, Switzerland (Chairman ad interim: Dr. Norbert Spirig)
| | - D M Kim
- Department of Ophthalmology, Seoul National University Hospital, Seoul, Korea (Chairman: Prof. Sang In Khwarg)
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Kim JH, Seong MW, Lee KE, Choi HJ, Ku EJ, Bae JH, Park SS, Choi SH, Kim SW, Shin C, Kim SY. Germline mutations and genotype-phenotype correlations in patients with apparently sporadic pheochromocytoma/paraganglioma in Korea. Clin Genet 2013; 86:482-6. [PMID: 24134185 DOI: 10.1111/cge.12304] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Revised: 09/27/2013] [Accepted: 10/15/2013] [Indexed: 11/29/2022]
Abstract
The aim of our study was to assess the frequency of germline mutations and develop the genetic testing strategy in patients with apparently sporadic pheochromocytoma/paraganglioma (PPGL) in Korea. We included 53 patients diagnosed with non-syndromic PPGL without a family history of PPGLs in three referral centers from 2004 to 2011. Succinate dehydrogenase complex B (SDHB), SDHD, Von Hippel-Lindau (VHL), and rearranged during transfection (RET) genes were examined by direct sequencing and multiple ligation-dependent probe amplification. The study patients were composed of 26 men and 27 women, and mean age was 50.1 ± 13.5 years. The frequency of germline mutations was 13.2% (7/53): RET (n = 2), VHL (n = 1), SDHB (n = 2), and SDHD (n = 2). Six of seven mutation carriers were diagnosed before the age of 50. One of two patients harboring an SDHB mutation had malignant PPGLs. One patient with multifocal head and neck paraganglioma (PGL) and pheochromocytoma (PHEO) carried a SDHD mutation. The carriers of germline mutations in patients with apparently sporadic PPGL were 13.2% in our study. We recommend genetic testing in patients below 50 years and SDHD genetic testing in patients with multifocal PPGLs. In malignant PPGLs, SDHB genetic testing may be performed.
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Affiliation(s)
- J H Kim
- Department of Internal medicine, Seoul National University College of Medicine, Seoul, South Korea
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Lee YK, Ha YC, Choi HJ, Jang S, Park C, Lim YT, Shin CS. Bisphosphonate use and subsequent hip fracture in South Korea. Osteoporos Int 2013; 24:2887-92. [PMID: 23681088 DOI: 10.1007/s00198-013-2395-5] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Accepted: 04/09/2013] [Indexed: 10/26/2022]
Abstract
UNLABELLED We determined the incidence of second hip fracture and evaluated whether compliant and persistent users of bisphosphonate had a lower incidence of second hip fracture after prior hip fracture, from a national claim registry. INTRODUCTION Bisphosphonate is prescribed worldwide for the primary prevention of osteoporotic fracture. However, the association between adherent use of bisphosphonate and prevention of second hip fracture is unclear. Our purpose was to determine whether the adherent use of bisphosphonate was associated with a decreased risk of second hip fracture in South Korea, using a nationwide database. METHODS From 2007 to 2011, first and second hip fractures were identified using the ICD-10 and procedure code form from the nationwide database of the Health Insurance Review and Assessment Service. Compliant use of bisphosphonate was defined as a patient medication possession ratio of 80 or more. Persistent users were defined patients with a refill gap of 30 days or less. We compared the incidence of second hip fracture in compliant and persistent users and non-users. RESULTS Among 59,782 patients with first hip fracture, in this study, 1,336 second hip fracture occurred after the initial hip fracture during the study period. The mean age at the first hip fracture was 75.4 years (range, 50 to 100 years). The cumulative 1-year, 2-year, and 3-year incidence of second hip fracture was 1.0% (552/59,782), 1.9% (1,123/59,782), and 2.2% (1,336/59,782), respectively. After multivariate analysis, compliant and persistent use of bisphosphonate was significantly independent protectors for second hip fracture (HR, 0.595; 95% CI, 0.400-0.885; HR, 0.433; 95% CI, 0.327-0.573, respectively). CONCLUSIONS Compliant and persistent use of bisphosphonate decreases the risk of second hip fracture, in terms of secondary prevention.
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Affiliation(s)
- Y-K Lee
- Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Korean Society for Bone and Mineral Research, 166 Gumi-ro, Bundang-gu, Seongnam-si, 463-707, South Korea
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Kim YA, Choi HJ, Lee JY, Han BG, Shin CS, Cho NH. Replication of Caucasian loci associated with bone mineral density in Koreans. Osteoporos Int 2013; 24:2603-10. [PMID: 23575750 DOI: 10.1007/s00198-013-2354-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Accepted: 03/04/2013] [Indexed: 12/11/2022]
Abstract
SUMMARY Most bone mineral density (BMD) loci were reported in Caucasian genome-wide association studies (GWAS). This study investigated the association between 59 known BMD loci (+200 suggestive SNPs) and DXA-derived BMD in East Asian population with respect to sex and site specificity. We also identified four novel BMD candidate loci from the suggestive SNPs. INTRODUCTION Most GWAS have reported BMD-related variations in Caucasian populations. This study investigates whether the BMD loci discovered in Caucasian GWAS are also associated with BMD in East Asian ethnic samples. METHODS A total of 2,729 unrelated Korean individuals from a population-based cohort were analyzed. We selected 747 single-nucleotide polymorphisms (SNPs). These markers included 547 SNPs from 59 loci with genome-wide significance (GWS, p value less than 5 × 10(-8)) levels and 200 suggestive SNPs that showed weaker BMD association with p value less than 5 × 10(-5). After quality control, 535 GWS SNPs and 182 suggestive SNPs were included in the replication analysis. RESULTS Of the 535 GWS SNPs, 276 from 25 loci were replicated (p < 0.05) in the Korean population with 51.6 % replication rate. Of the 182 suggestive variants, 16 were replicated (p < 0.05, 8.8 % of replication rate), and five reached a significant combined p value (less than 7.0 × 10(-5), 0.05/717 SNPs, corrected for multiple testing). Two markers (rs11711157, rs3732477) are for the same signal near the gene CPN2 (carboxypeptidase N, polypeptide 2). The other variants, rs6436440 and rs2291296, were located in the genes AP1S3 (adaptor-related protein complex 1, sigma 3 subunit) and RARB (retinoic acid receptor, beta). CONCLUSION Our results illustrate ethnic differences in BMD susceptibility genes and underscore the need for further genetic studies in each ethnic group. We were also able to replicate some SNPs with suggestive associations. These SNPs may be BMD-related genetic markers and should be further investigated.
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Affiliation(s)
- Y A Kim
- Department of Internal Medicine, Seoul National University College of Medicine, 28 Yungun-Dong, Chongno-Gu, Seoul, 110-744, Korea
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