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Lee A, Jang S, Lee S, Park HK, Kim IY, Ahn R, Seok JH, Lee KR. Comparative analysis of salivary cortisol measurements using different assay methods in relation to serum-free cortisol measurement. Pract Lab Med 2024; 40:e00393. [PMID: 38645932 PMCID: PMC11026831 DOI: 10.1016/j.plabm.2024.e00393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 03/26/2024] [Accepted: 04/08/2024] [Indexed: 04/23/2024] Open
Abstract
Objectives Salivary cortisol reflects the biologically active form of serum cortisol, offering a noninvasive evaluation method for the diurnal rhythm of the hypothalamic-pituitary-adrenal (HPA) axis. While liquid chromatography-tandem mass spectrometry (LC-MS/MS) is known for its specificity, immunoassays (IA) are commonly used because of their simplicity. This study aimed to assess the performance of salivary cortisol measurement using both IA and LC-MS/MS in comparison to serum-free cortisol measurement. Methods Assay results for 188 saliva and 94 serum samples from 47 participants were analyzed. Salivary samples collected at different time points were analyzed using IA and LC-MS/MS. Serum samples were analyzed for cortisol, cortisol-binding globulin, and free cortisol. The statistical analyses included correlations and method comparisons. Results The diurnal salivary cortisol profiles exhibited a comparable circadian rhythm pattern; however, the concentrations measured using IA were consistently higher than those measured using LC-MS/MS. The correlation analysis revealed robust associations among salivary cortisol (IA), salivary cortisol (LC-MS/MS), and serum-free cortisol levels (LC-MS/MS). However, the method comparison revealed a systematic bias between IA and LC-MS/MS in salivary cortisol measurement. Conclusions This study contributes to the ongoing debate on assay techniques by affirming the suitability of IA and LC-MS/MS for salivary cortisol measurement to assess dynamic changes in HPA axis activity. The identified systematic bias emphasizes the importance of selecting methods based on specific research or clinical requirements.
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Affiliation(s)
- Anna Lee
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Yong-In, Republic of Korea
| | - Sooah Jang
- Research Institute of Minds.AI, Co. Ltd., Seoul, Republic of Korea
- Institute of Behavioral Sciences in Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Sanghoo Lee
- Center for Companion Biomarker, Seoul Clinical Laboratories Healthcare Inc., Yong-In, Republic of Korea
| | - Hyun-Kyung Park
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Yong-In, Republic of Korea
| | - In-Young Kim
- Research Institute of Minds.AI, Co. Ltd., Seoul, Republic of Korea
| | - Ryunsup Ahn
- Institute of Behavioral Sciences in Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
- Hormone Analysis Center, Minds.AI, Co. Ltd., Seoul, Republic of Korea
| | - Jeong-Ho Seok
- Research Institute of Minds.AI, Co. Ltd., Seoul, Republic of Korea
- Institute of Behavioral Sciences in Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
- Department of Psychiatry, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Kyoung-Ryul Lee
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Yong-In, Republic of Korea
- Center for Companion Biomarker, Seoul Clinical Laboratories Healthcare Inc., Yong-In, Republic of Korea
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Jang S, Kim IY, Choi SW, Lee A, Lee JY, Shin H, Lee J, Lee M, Lee KR, Jung S, Ryu JS, Oh J, Kwon M, Kim J, Ahn R, Jung YC, Seok JH. Exploratory Clinical Trial of a Depression Diagnostic Software That Integrates Stress Biomarkers and Composite Psychometrics. Psychiatry Investig 2024; 21:230-241. [PMID: 38569581 PMCID: PMC10990624 DOI: 10.30773/pi.2023.0253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 11/09/2023] [Accepted: 11/30/2023] [Indexed: 04/05/2024] Open
Abstract
OBJECTIVE This study evaluated the clinical effectiveness of Minds.NAVI, a depression screening kit combining psychometric measures and stress hormone biomarkers, in a prospective clinical trial. The objective was to assess its potential as a depression screening tool and investigate the associations between psychological assessments, salivary hormone staging, and depression severity. METHODS Thirty-five participants with major depressive disorder and 12 healthy controls (HCs) were included. The Minds.NAVI software, utilizing the PROtective and Vulnerable factors battEry Test (PROVE) and salivary cortisol/dehydroepiandrosterone (DHEA) analysis, was employed. The PROVE test is a comprehensive self-report questionnaire that assesses depressive symptoms, suicide risk, attachment style, adverse childhood experiences, mentalization capacity, and resilience. In addition, salivary cortisol and DHEA levels were measured to evaluate the functional stage of the hypothalamic-pituitary-adrenal (HPA) axis. RESULTS Minds.NAVI exhibited 100% sensitivity, 91.7% specificity, and 97.9% accuracy in distinguishing depression from HCs within an exploratory small group. Salivary stress hormone phases showed changes with depression stage (p=0.030), and the proportion of patients with "adrenal exhaustion stage" was higher in the moderate/severe depression group (p=0.038). Protective/vulnerable factors differed significantly between controls and depressed groups (p<0.001). Cortisol awakening response inversely correlated with depressive symptom severity (r=-0.31, p=0.034). CONCLUSION This study suggested possible clinical effectiveness of Minds.NAVI, a depression screening tool that integrates psychometric measures and stress hormone biomarkers. The findings support the potential association between depression, chronic stress, and HPA axis hyporesponsiveness.
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Affiliation(s)
- Sooah Jang
- Research Institute of Minds.AI, Co. Ltd., Seoul, Republic of Korea
- Institue of Behavioral Sciences in Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - In-Young Kim
- Research Institute of Minds.AI, Co. Ltd., Seoul, Republic of Korea
| | - Sun-Woo Choi
- Research Institute of Minds.AI, Co. Ltd., Seoul, Republic of Korea
| | - Anna Lee
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Yongin, Republic of Korea
| | - Ju-Yeal Lee
- Research Institute of Minds.AI, Co. Ltd., Seoul, Republic of Korea
| | - Hyunkyung Shin
- Research Institute of Minds.AI, Co. Ltd., Seoul, Republic of Korea
- Institue of Behavioral Sciences in Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Junwoo Lee
- Research Institute of Minds.AI, Co. Ltd., Seoul, Republic of Korea
| | - Mikyeong Lee
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Yongin, Republic of Korea
| | - Kyoung-Ryul Lee
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Yongin, Republic of Korea
| | - Saeeun Jung
- Research Institute of Minds.AI, Co. Ltd., Seoul, Republic of Korea
| | - Jin Sun Ryu
- Research Institute of Minds.AI, Co. Ltd., Seoul, Republic of Korea
- Institue of Behavioral Sciences in Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
- Department of Psychiatry, Myongji Hospital, Hanyang University College of Medicine, Goyang, Republic of Korea
| | - Jihee Oh
- Institue of Behavioral Sciences in Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Manjae Kwon
- Institue of Behavioral Sciences in Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
- Department of Psychiatry, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Joohan Kim
- Department of Communication, Yonsei University, Seoul, Republic of Korea
| | - Ryunsup Ahn
- Institue of Behavioral Sciences in Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
- Hormone Analysis Center, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Young-Chul Jung
- Institue of Behavioral Sciences in Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
- Department of Psychiatry, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jeong-Ho Seok
- Research Institute of Minds.AI, Co. Ltd., Seoul, Republic of Korea
- Institue of Behavioral Sciences in Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
- Department of Psychiatry, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
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Kang H, Park SS, Kim YH, Lim HS, Lee MK, Lee KR, Kim JH, Kim YH. Preoperative Serum Copeptin Can Predict Delayed Hyponatremia after Pituitary Surgery in the Absence of Arginine Vasopressin Deficiency. Endocrinol Metab (Seoul) 2024; 39:164-175. [PMID: 38171208 PMCID: PMC10901654 DOI: 10.3803/enm.2023.1792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 11/10/2023] [Accepted: 11/21/2023] [Indexed: 01/05/2024] Open
Abstract
BACKGRUOUND Delayed postoperative hyponatremia (DPH) is the most common cause of readmission after pituitary surgery. In this study, we aimed to evaluate the cutoff values of serum copeptin and determine the optimal timing for copeptin measurement for the prediction of the occurrence of DPH in patients who undergo endoscopic transsphenoidal approach (eTSA) surgery and tumor resection. METHODS This was a prospective observational study of 73 patients who underwent eTSA surgery for pituitary or stalk lesions. Copeptin levels were measured before surgery, 1 hour after extubation, and on postoperative days 1, 2, 7, and 90. RESULTS Among 73 patients, 23 patients (31.5%) developed DPH. The baseline ratio of copeptin to serum sodium level showed the highest predictive performance (area under the curve [AUROC], 0.699), and its optimal cutoff to maximize Youden's index was 2.5×10-11, with a sensitivity of 91.3% and negative predictive value of 92.0%. No significant predictors were identified for patients with transient arginine vasopressin (AVP) deficiency. However, for patients without transient AVP deficiency, the copeptin-to-urine osmolarity ratio at baseline demonstrated the highest predictive performance (AUROC, 0.725). An optimal cutoff of 6.5×10-12 maximized Youden's index, with a sensitivity of 92.9% and a negative predictive value of 94.1%. CONCLUSION The occurrence of DPH can be predicted using baseline copeptin and its ratio with serum sodium or urine osmolarity only in patients without transient AVP deficiency after pituitary surgery.
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Affiliation(s)
- Ho Kang
- Department of Neurosurgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - Seung Shin Park
- Department of Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Yoo Hyung Kim
- Department of Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Hwan Sub Lim
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Yongin, Korea
| | - Mi-Kyeong Lee
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Yongin, Korea
| | - Kyoung-Ryul Lee
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Yongin, Korea
| | - Jung Hee Kim
- Department of Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
- Pituitary Center, Seoul National University Hospital, Seoul, Korea
| | - Yong Hwy Kim
- Pituitary Center, Seoul National University Hospital, Seoul, Korea
- Department of Neurosurgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
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Song S, Shon J, Yang WR, Kang HB, Kim KH, Park JY, Lee S, Baik SY, Lee KR, Park YJ. Short-Term Effects of Weight-Loss Meal Replacement Programs with Various Macronutrient Distributions on Gut Microbiome and Metabolic Parameters: A Pilot Study. Nutrients 2023; 15:4744. [PMID: 38004139 PMCID: PMC10675061 DOI: 10.3390/nu15224744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 10/21/2023] [Accepted: 10/31/2023] [Indexed: 11/26/2023] Open
Abstract
It has emerged the gut microbiome is crucially linked to metabolic health and obesity. Macronutrient distribution has been discussed as a key parameter in weight-loss programs, but little is known about its impact on the gut microbiome. We investigated the effects of weight-loss meal replacement programs with different macronutrient ratios on the gut microbiota and metabolic parameters in subjects with overweight and obesity. Three low-calorie meal replacement programs with different ratios of carbohydrates, proteins, and lipids were designed: a balanced diet (Group B, 60:15:30), a high-lipid-low-carbohydrate diet (Group F, 35:20:55), and a protein-enriched diet (Group P, 40:25:35). Sixty overweight or obese participants were provided with the meals twice daily for 3 weeks. In all groups, diet intervention resulted in reduced body weight and BMI. The relative abundance of Bacteroidetes and Firmicutes phyla decreased and increased, respectively, which increased the Firmicutes/Bacteroidetes (F/B) ratio in all subjects, particularly in Groups B and P. Alpha- and beta-diversity were augmented at the phylum level in Group P. In conclusion, short-term interventions with weight-loss meal replacement programs increased butyrate-producing bacteria and the F/B ratio. Moreover, the protein-enriched diet significantly increased alpha- and beta-diversity compared to the balanced diet and the high-lipid-low-carbohydrate diet.
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Affiliation(s)
- Seungmin Song
- Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Jinyoung Shon
- Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Woo-ri Yang
- Hyundai Greenfood Greating Laboratory, Yongin-si 16827, Republic of Korea
| | - Han-Bit Kang
- Hyundai Greenfood Greating Laboratory, Yongin-si 16827, Republic of Korea
| | - Keun-Ha Kim
- Hyundai Greenfood Greating Laboratory, Yongin-si 16827, Republic of Korea
| | - Ju-Yeon Park
- Hyundai Greenfood Greating Laboratory, Yongin-si 16827, Republic of Korea
| | - Sanghoo Lee
- SCL Healthcare Inc., Yongin-si 16954, Republic of Korea
| | - Sae Yun Baik
- Hanaro Medical Foundation, Seoul 03159, Republic of Korea
| | - Kyoung-Ryul Lee
- SCL Healthcare Inc., Yongin-si 16954, Republic of Korea
- Hanaro Medical Foundation, Seoul 03159, Republic of Korea
| | - Yoon Jung Park
- Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul 03760, Republic of Korea
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Lee KR, Seo J, Kwon SS, Kim N, Lee YJ, Son JG, Lee SH. Vibroacoustic Characteristics of a Specific Patterned Polymer with Graphene for an Electrostatic Speaker. ACS Appl Mater Interfaces 2023; 15:7319-7328. [PMID: 36701764 DOI: 10.1021/acsami.2c15921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Graphene/polymer actuators were developed using bilayer graphene and various polymer substrates for use as transparent, flexible, and robust electrostatic speaker units. Additionally, a resonant frequency shift was induced using a polymer substrate on which various micropatterns were transferred to boost bass. The total sound pressure level (SPL) in the graphene/polymer actuator was measured by a sweep, and the frequency of the spectrum was confirmed to be one-third that of the octave band frequency. The change in the vibroacoustic characteristic with changes in Young's modulus and density was studied for the polymers of the same size and thickness. Particularly, the possibility of boosting bass was confirmed by inducing a resonant frequency shift and increasing the total SPL by adding micropatterns on a polymer substrate under the same conditions. The resonance frequency of 523 Hz and the SPL of 54 dBA in flat polymer film became 296 Hz and 69 dBA in a specific pattern, which produced a sound of >15 dB based on the same flat polymer. We expect that the design and information provided herein can provide the key parameters required to change the resonant frequency in small-size devices for the application of graphene/polymer thin-film actuators.
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Affiliation(s)
- Kyoung-Ryul Lee
- Center for Biomicrosystems, Brain Science Institute, Korea Institute of Science and Technology, Seoul02792, Korea
| | - Jaemin Seo
- Center for Biomicrosystems, Brain Science Institute, Korea Institute of Science and Technology, Seoul02792, Korea
| | - Sun Sang Kwon
- Center for Biomicrosystems, Brain Science Institute, Korea Institute of Science and Technology, Seoul02792, Korea
| | - Namyun Kim
- Center for Biomicrosystems, Brain Science Institute, Korea Institute of Science and Technology, Seoul02792, Korea
| | - Yi Jae Lee
- Center for Biomicrosystems, Brain Science Institute, Korea Institute of Science and Technology, Seoul02792, Korea
| | - Jeong Gon Son
- Soft Hybrid Materials Research Center, Advanced Materials Research Division, Korea Institute of Science and Technology, Seoul02792, Korea
| | - Soo Hyun Lee
- Center for Biomicrosystems, Brain Science Institute, Korea Institute of Science and Technology, Seoul02792, Korea
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Jang HN, Kang H, Kim YH, Lim HS, Lee MK, Lee KR, Kim YH, Kim JH. Serum copeptin levels at day two after pituitary surgery and ratio to baseline predict postoperative central diabetes insipidus. Pituitary 2022; 25:1004-1014. [PMID: 36322283 DOI: 10.1007/s11102-022-01278-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/23/2022] [Indexed: 11/21/2022]
Abstract
PURPOSE Central diabetes insipidus is a complication that may occur after pituitary surgery and has been difficult to predict. This study aimed to identify the cutoff levels of serum copeptin and its optimal timing for predicting the occurrence of central diabetes insipidus in patients who underwent transsphenoidal surgery. METHODS This was a prospective observational study of patients who underwent transsphenoidal surgery for pituitary gland or stalk lesions. Copeptin levels were measured before surgery, 1 h after extubation, and on postoperative days 1, 2, 7, and 90. RESULTS Among 73 patients, 14 (19.2%) and 13 (17.8%) patients developed transient and permanent central diabetes insipidus, respectively. There was no significant difference in copeptin levels before surgery and 1 h after extubation; copeptin levels on postoperative days 1, 2, 7, and 90 were significantly lower in patients with permanent central diabetes insipidus than in those without central diabetes insipidus. Copeptin measurement on postoperative day 2 exhibited the highest performance for predicting permanent central diabetes insipidus among postoperative days 1, 2, and 7 (area under the curve [95% confidence interval] = 0.754 [0.632-0.876]). Serum copeptin level at postoperative day 2(< 3.1 pmol/L) showed a sensitivity of 92.3% and a negative predictive value of 97.1%. The ratio of copeptin at postoperative day 2 to baseline (< 0.94) presented a sensitivity of 84.6% and a negative predictive value of 94.9%. The copeptin levels > 3.4 and 7.5 pmol/L at postoperative day 2 and 7 may have ruled out the occurrence of CDI with a negative predictive value of 100%. CONCLUSION The copeptin level at postoperative day 2 and its ratio to baseline can predict the occurrence of permanent central diabetes insipidus after pituitary surgery.
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Affiliation(s)
- Han Na Jang
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, 03080, Seoul, Republic of Korea
| | - Ho Kang
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, 03080, Seoul, Republic of Korea
| | - Yoo Hyung Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, 03080, Seoul, Republic of Korea
| | - Hwan Sub Lim
- Department of Laboratory Medicine, Seoul Clinical Laboratories, 25F, Heungdeok IT Valley, 13 Heungdeok1-ro, Giheung-gu, 16954, Yongin, Gyeonggi-do, Republic of Korea
| | - Mi-Kyeong Lee
- Department of Laboratory Medicine, Seoul Clinical Laboratories, 25F, Heungdeok IT Valley, 13 Heungdeok1-ro, Giheung-gu, 16954, Yongin, Gyeonggi-do, Republic of Korea
| | - Kyoung-Ryul Lee
- Department of Laboratory Medicine, Seoul Clinical Laboratories, 25F, Heungdeok IT Valley, 13 Heungdeok1-ro, Giheung-gu, 16954, Yongin, Gyeonggi-do, Republic of Korea
| | - Yong Hwy Kim
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, 03080, Seoul, Republic of Korea.
- Pituitary Center, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, 03080, Seoul, Republic of Korea.
| | - Jung Hee Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, 03080, Seoul, Republic of Korea.
- Pituitary Center, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, 03080, Seoul, Republic of Korea.
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Kim HI, Choi EA, Paik EC, Park S, Hwang YI, Lee JH, Seo SK, Cho S, Choi YS, Lee BS, Park J, Lee S, Lee KR, Yun BH. Identification of Single Nucleotide Polymorphisms as Biomarkers for Recurrent Pregnancy Loss in Korean Women. J Korean Med Sci 2022; 37:e336. [PMID: 36631028 PMCID: PMC9705206 DOI: 10.3346/jkms.2022.37.e336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 10/12/2022] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Single nucleotide polymorphisms (SNPs) are reportedly associated with repeated abortion. Thus, genetic analysis based on race is the key to developing accurate diagnostic tests. This study analyzed the genetic polymorphisms of recurrent pregnancy loss (RPL) patients among Korean women compared to the controls. METHODS In 53 women of RPL group and 50 controls, the genetic analysis was performed. The genotype distribution and allele frequency were analyzed statistically for the difference between the two groups. The association between each SNP marker and RPL risk was analyzed. RESULTS The genotypes of LEPR, endothelial nitric oxide synthase (eNOS), KDR, miR-27a, miR-449b, and tumor necrosis factor-alpha (TNF-α) were analyzed using odds ratio (OR) with 95% confidence intervals (CIs). Only the AG genotype of miR-449b (A>G) polymorphism showed significant association with the risk of RPL when compared to the AA genotype (OR, 2.39). The combination of GG/AG+GG/CA+AA genotypes for eNOS/miR-449b/TNF-α was associated with 7.36-fold higher risk of RPL (OR, 7.36). The GG/AG+GG combination for eNOS/miR-449b showed 2.43-fold higher risk for RPL (OR, 2.43). The combination of AG+GG/CA+AA genotypes for miR-449b/TNF-α showed a significant association with the risk of RPL (OR, 7.60). From the haplotype-based analysis, the G-G-A haplotype of eNOS/miR-449b/TNF-α and the G-A haplotype of miR-449b/TNF-α were associated with increased risk of RPL (OR, 19.31; OR, 22.08, respectively). CONCLUSION There is a significant association between the risk of RPL and miR-449b/TNF-α combination, and therefore, genetic analysis for specific combined genotypes can be an important screening method for RPL in Korean women.
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Affiliation(s)
- Hye In Kim
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Eun A Choi
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | | | | | - Yu Im Hwang
- Bundang Cheil Women's Hospital, Seongnam, Korea
| | - Jae Hoon Lee
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Korea
- Department of Obstetrics and Gynecology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Seok Kyo Seo
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - SiHyun Cho
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Korea
- Department of Obstetrics and Gynecology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Young Sik Choi
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - Byung Seok Lee
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - Jimyeong Park
- Seoul Clinical Laboratories Healthcare Co., Ltd., Yongin, Korea
| | - Sanghoo Lee
- Seoul Clinical Laboratories Healthcare Co., Ltd., Yongin, Korea.
| | - Kyoung-Ryul Lee
- Seoul Clinical Laboratories Healthcare Co., Ltd., Yongin, Korea
| | - Bo Hyon Yun
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
- Bundang Cheil Women's Hospital, Seongnam, Korea.
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Lee S, Kim SA, Hong J, Kim Y, Hong G, Baik S, Choi K, Lee MK, Lee KR. Identification of genetic variants related to metabolic syndrome by next-generation sequencing. Diabetol Metab Syndr 2022; 14:119. [PMID: 35999587 PMCID: PMC9396768 DOI: 10.1186/s13098-022-00893-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 08/12/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Metabolic syndrome (MetS) is a cluster of conditions associated with glucose intolerance, hypertension, abdominal obesity, dyslipidemia, and insulin resistance that increase the risk of cardiovascular diseases (CVD) and type 2 diabetes (T2D). Since MetS is known as a complex symptom with a high incidence of genetic factors, it is important to identify genetic variants for each clinical characteristic of MetS. METHODS We performed targeted next-generation sequencing (NGS) to identify genetic variants related to obesity, blood glucose, triacylglycerol (TG), and high-density lipoprotein (HDL)-cholesterol level, and hypertension in 48 subjects with MetS and in 48 healthy subjects. RESULTS NGS analysis revealed that 26 of 48 subjects (54.2%) with MetS had putative non-synonymous variants related to the clinical features of MetS. Of the subjects with MetS, 8 (16.7%) had variants in 4 genes (COL6A2, FTO, SPARC, and MTHFR) related to central obesity, 17 (35.4%) had variants in 6 genes (APOB, SLC2A2, LPA, ABCG5, ABCG8, and GCKR) related to hyperglycemia, 3 (6.3%) had variants in 4 genes (APOA1, APOC2, APOA4, and LMF1) related to hypertriglyceridemia, 8 (16.7%) had variants in 4 genes (ABCA1, CETP, SCARB1, and LDLR) related to low HDL-cholesterolemia, and 5 (10.4%) had variants in ADD1 related to hypertension. CONCLUSIONS Our findings may contribute to broadening the genetic spectrum of risk variants related to the development of MetS.
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Affiliation(s)
- Sanghoo Lee
- Center for Companion Biomarker, Seoul Clinical Laboratories Healthcare Inc., 23F, Bldg. A, Heungdeok IT Valley, 13 Heungdeok 1-ro, Giheung-gu, Yongin, Gyeonggi-do, 16954, Korea.
| | - Seol-A Kim
- Center for Companion Biomarker, Seoul Clinical Laboratories Healthcare Inc., 23F, Bldg. A, Heungdeok IT Valley, 13 Heungdeok 1-ro, Giheung-gu, Yongin, Gyeonggi-do, 16954, Korea
| | - Jeonghoon Hong
- Center for Companion Biomarker, Seoul Clinical Laboratories Healthcare Inc., 23F, Bldg. A, Heungdeok IT Valley, 13 Heungdeok 1-ro, Giheung-gu, Yongin, Gyeonggi-do, 16954, Korea
| | - Yejin Kim
- Center for Companion Biomarker, Seoul Clinical Laboratories Healthcare Inc., 23F, Bldg. A, Heungdeok IT Valley, 13 Heungdeok 1-ro, Giheung-gu, Yongin, Gyeonggi-do, 16954, Korea
| | - Gayeon Hong
- Center for Companion Biomarker, Seoul Clinical Laboratories Healthcare Inc., 23F, Bldg. A, Heungdeok IT Valley, 13 Heungdeok 1-ro, Giheung-gu, Yongin, Gyeonggi-do, 16954, Korea
| | - SaeYun Baik
- Central Laboratory, Seoul Clinical Laboratories Healthcare Inc., 23F, Bldg. A, Heungdeok IT Valley, 13 Heungdeok 1-ro, Giheung-gu, Yongin, Gyeonggi-do, 16954, Korea
| | - Kyeonghwan Choi
- HANARO Medical Foundation, 5F, 1 TOWER, GRAN SEOUL, 33 Jong-ro, Jongno-gu, Seoul, 03159, Korea
| | - Mi-Kyeong Lee
- Department of MyGenome, Seoul Clinical Laboratories, 28F, Bldg. A, Heungdeok IT Valley, 13 Heungdeok 1-ro, Giheung-gu, Yongin, Gyeonggi-do, 16954, Korea
| | - Kyoung-Ryul Lee
- Center for Companion Biomarker, Seoul Clinical Laboratories Healthcare Inc., 23F, Bldg. A, Heungdeok IT Valley, 13 Heungdeok 1-ro, Giheung-gu, Yongin, Gyeonggi-do, 16954, Korea.
- Central Laboratory, Seoul Clinical Laboratories Healthcare Inc., 23F, Bldg. A, Heungdeok IT Valley, 13 Heungdeok 1-ro, Giheung-gu, Yongin, Gyeonggi-do, 16954, Korea.
- HANARO Medical Foundation, 5F, 1 TOWER, GRAN SEOUL, 33 Jong-ro, Jongno-gu, Seoul, 03159, Korea.
- Department of MyGenome, Seoul Clinical Laboratories, 28F, Bldg. A, Heungdeok IT Valley, 13 Heungdeok 1-ro, Giheung-gu, Yongin, Gyeonggi-do, 16954, Korea.
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Bae HG, Hong J, Kim YJ, Lee KR, Lee K, Choi SJ, Uh Y. A Retrospective National Study on Colonization Rate and Antimicrobial Susceptibility of Streptococcus agalactiae in Pregnant Korean Women, 2018-2020. Yonsei Med J 2022; 63:717-723. [PMID: 35914753 PMCID: PMC9344270 DOI: 10.3349/ymj.2022.63.8.717] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 05/07/2022] [Accepted: 05/19/2022] [Indexed: 11/27/2022] Open
Abstract
PURPOSE The prevalence of Group B Streptococcus (GBS) colonization in pregnant Korean women is increasing; however, nationwide studies are lacking. Therefore, we aimed to analyze regional colonization rates and antimicrobial susceptibility for GBS in pregnant Korean women through a nationwide survey. MATERIALS AND METHODS From January 2018 to December 2020, data from the Seoul Clinical Laboratories on vaginal swab cultures were retrospectively analyzed to detect maternal GBS carriers. Each swab specimen was inoculated onto a 5% blood agar plate and incubated at 35℃-37℃ in a 5% CO2 incubator for 24 h. GBS isolates were identified using a Microflex MALDI Biotyper. Antimicrobial susceptibility tests were performed using the Vitek 2 automated system. RESULTS The overall nationwide GBS colonization rate in pregnant Korean women was found to be 10.6% (3578/33721). The maternal GBS colonization rates ranged from 10.5%-10.8% over the 3-year study period. The GBS colonization rates by province, in descending order, were as follows: Jeolla-do, 13.2%; Gangwon-do, 12.0%; Chungcheong-do, 11.8%; Gyeonggi-do, 11.3%; Seoul, 10.2%; and Gyeongsang-do, 9.6%. During the study period, the resistance rates against chloramphenicol, levofloxacin, clindamycin, erythromycin, and tetracycline were 2.6%-2.7%, 18.2%-19.6%, 33.4%-35.7%, 35.6%-36.8%, and 50.5%-53.3%, respectively. CONCLUSION In pregnant Korean women, GBS colonization rates were in the range of 9.6%-13.2%, with Gyeongsang-do being the lowest and Jeolla-do the highest. The resistance rate against clindamycin was high (33.4%-35.7%). GBS colonization rates during pregnancy should be studied nationwide according to the Centers for Disease Control and Prevention-recommended guidelines with periodic antimicrobial resistance monitoring.
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Affiliation(s)
| | | | | | | | - Kyungwon Lee
- Seoul Clinical Laboratories, Yongin, Korea
- Department of Laboratory Medicine and Research Institute of Bacterial Resistance, Yonsei University College of Medicine, Seoul, Korea
| | - Seong Jin Choi
- Department of Obstetrics and Gynecology, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Young Uh
- Department of Laboratory Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
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10
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Lee A, Nahm CH, Lee JS, Lee MK, Lee KR. Assessment of antiphospholipid antibodies and calprotectin as biomarkers for discriminating mild from severe COVID-19. J Clin Lab Anal 2021; 35:e24004. [PMID: 34608677 PMCID: PMC8605160 DOI: 10.1002/jcla.24004] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 08/23/2021] [Accepted: 09/03/2021] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND To explore the association of thrombo-inflammatory biomarkers with severity in coronavirus disease (COVID-19), we measured antiphospholipid antibodies (aPL) and calprotectin in sera of COVID-19 patients. METHODS Anticardiolipin antibodies (aCL) and anti-β2-glycoprotein I antibodies were measured using enzyme-linked immunosorbent assay (ELISA) and multiplex flow immunoassay (MFIA) in hospitalized COVID-19 patients (N = 105) and healthy controls (N = 38). Anti-phosphatidylserine/prothrombin antibodies, calprotectin, and C-reactive protein (CRP) levels were also measured. We assessed the potential correlation between calprotectin levels and various laboratory parameters that were measured during the hospitalization period. After stratifying COVID-19 patients into two groups by their oxygenation status or acute respiratory distress syndrome presentation, the discriminatory performance of each biomarker was evaluated. RESULTS A high proportion of COVID-19 patients (29.5%, 31/105) had low aCL IgM titers that were detectable by ELISA but mostly below the detection limit of MFIA. Calprotectin levels in severe groups of COVID-19 were significantly higher than those in non-severe groups, while CRP levels revealed no significant differences. Serum calprotectin levels showed strong to moderate degree of correlation with other routinely used parameters including peak levels of CRP, ferritin, procalcitonin, BUN, and neutrophil-to-lymphocyte ratio, but a negative correlation with minimal lymphocyte count and CD4+ T cells. The discriminatory performance was highest for calprotectin in discriminating severe groups of COVID-19. CONCLUSIONS Serum calprotectin levels were significantly elevated in severe COVID-19 cases. The prevalence of clinically significant aPL did not differ. The link between calprotectin and inflammatory pathway in COVID-19 may help improve the management and outcomes of COVID-19 patients.
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Affiliation(s)
- Anna Lee
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Yong-In, Korea
| | - Chung Hyun Nahm
- Department of Laboratory Medicine, Inha University College of Medicine, Incheon, Korea
| | - Jin-Soo Lee
- Division of Infectious Diseases, Department of Internal Medicine, Inha University College of Medicine, Incheon, Korea
| | - Mi-Kyeong Lee
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Yong-In, Korea
| | - Kyoung-Ryul Lee
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Yong-In, Korea
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11
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Lee S, Lee MK, Na H, Ahn J, Hong G, Lee Y, Park J, Kim Y, Kim YT, Kim CK, Lim HS, Lee KR. Comparative analysis of mutational hotspots in the spike protein of SARS-CoV-2 isolates from different geographic origins. Gene Rep 2021; 23:101100. [PMID: 33778182 PMCID: PMC7985685 DOI: 10.1016/j.genrep.2021.101100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 03/01/2021] [Accepted: 03/11/2021] [Indexed: 11/27/2022]
Abstract
The spike (S) protein mutations of SARS-CoV-2 are of major concern in terms of viral transmission and pathogenesis. Hence, we developed a PCR-based method to rapidly detect the 6 mutational hotspots (H49Y, G476S, V483A, H519Q, A520S, and D614G) in the S protein and applied this method to analyze the hotspots in the viral isolates from different geographical origins. Here, we identified that there was only the D614G mutation in the viral isolates. As of September 30, 2020, the analysis of 113,381 sequences available from the public repositories revealed that the SARS-CoV-2 variant carrying G614 has become the most prevalent form globally. Our results support recent epidemiological and genomic data demonstrating that the viral infectivity and transmission are enhanced by the S protein D614G mutation.
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Key Words
- ACE2, angiotensin-converting enzyme-2
- COVID-19, Coronavirus disease
- CT, cycle threshold
- D614G mutation
- Different geographic origins
- E, envelope
- M, membrane
- Mutational hotspots
- N, nucleocapsid
- NGS, next-generation sequencing
- Nsp3, nonstructural protein
- Orf, open reading frame
- RDB, receptor-binding domain
- RT-qPCR, reverse transcriptase-quantitative polymerase chain reaction
- RdRp, RNA-dependent RNA polymerase
- S, Spike
- SARS-CoV-2
- SARS-CoV-2, severe acute respiratory syndrome coronavirus 2
- Spike gene
- Spike protein
- TMPRSS2, transmembrane serine protease2
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Affiliation(s)
- Sanghoo Lee
- Center for Companion Biomarker, Seoul Clinical Laboratories (SCL) Healthcare Inc., Republic of Korea
| | - Mi-Kyeong Lee
- Department of Molecular Diagnostics, Seoul Clinical Laboratories, Republic of Korea
| | - Hyeongkyun Na
- Center for Companion Biomarker, Seoul Clinical Laboratories (SCL) Healthcare Inc., Republic of Korea
| | - Jinwoo Ahn
- Center for Companion Biomarker, Seoul Clinical Laboratories (SCL) Healthcare Inc., Republic of Korea
| | - Gayeon Hong
- Center for Companion Biomarker, Seoul Clinical Laboratories (SCL) Healthcare Inc., Republic of Korea
| | - Youngkee Lee
- Center for Companion Biomarker, Seoul Clinical Laboratories (SCL) Healthcare Inc., Republic of Korea
| | - Jimyeong Park
- Center for Companion Biomarker, Seoul Clinical Laboratories (SCL) Healthcare Inc., Republic of Korea
| | - Yejin Kim
- Center for Companion Biomarker, Seoul Clinical Laboratories (SCL) Healthcare Inc., Republic of Korea
| | - Yun-Tae Kim
- Center for Technology Innovation, Seoul Clinical Laboratories, Republic of Korea
| | - Chang-Ki Kim
- Center for Clinical Trial, Seoul Clinical Laboratories, Republic of Korea
| | - Hwan-Sub Lim
- Department of Molecular Diagnostics, Seoul Clinical Laboratories, Republic of Korea
| | - Kyoung-Ryul Lee
- Center for Companion Biomarker, Seoul Clinical Laboratories (SCL) Healthcare Inc., Republic of Korea.,Department of Molecular Diagnostics, Seoul Clinical Laboratories, Republic of Korea.,Center for Technology Innovation, Seoul Clinical Laboratories, Republic of Korea.,Center for Clinical Trial, Seoul Clinical Laboratories, Republic of Korea
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12
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Lee S, Won D, Kim CK, Ahn J, Lee Y, Na H, Kim YT, Lee MK, Choi JR, Lim HS, Lee KR. Novel indel mutation in the N gene of SARS-CoV-2 clinical samples that were diagnosed positive in a commercial RT-PCR assay. Virus Res 2021; 297:198398. [PMID: 33753180 PMCID: PMC7977010 DOI: 10.1016/j.virusres.2021.198398] [Citation(s) in RCA: 5] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 03/16/2021] [Indexed: 11/03/2022]
Abstract
Commercially available reverse transcription-polymerase chain reaction (RT-PCR) kits are being used as an important tool to diagnose SARS-CoV-2 infection in clinical laboratories worldwide. However, some kits lack sufficient clinical evaluation due to the need for emergency use caused by the current COVID-19 pandemic. Here we found that a novel insertion/deletion mutation in the nucleocapsid (N) gene of SARS-CoV-2 samples is a cause of negative results for the N gene in a widely used assay that received emergency use authorization (EUA) from US FDA and Conformite Europeenne-in vitro diagnostics (CE-IVD) from EU. Although SARS-CoV-2 is diagnosed positive by other target probes in the assay, our findings provide an evidence of the genetic variability and rapid evolution of SARS-CoV-2 as well as a reference in designing commercial RT-PCR assays.
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Affiliation(s)
- Sanghoo Lee
- Center for Companion Biomarker, Seoul Clinical Laboratories Healthcare Co., Ltd, Gyeonggi-do, Republic of Korea.
| | - DongJu Won
- Department of Laboratory Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Chang-Ki Kim
- Center for Clinical Trial, Seoul Clinical Laboratories, Gyeonggi-do, Republic of Korea
| | - Jinwoo Ahn
- Center for Companion Biomarker, Seoul Clinical Laboratories Healthcare Co., Ltd, Gyeonggi-do, Republic of Korea
| | - Youngkee Lee
- Center for Companion Biomarker, Seoul Clinical Laboratories Healthcare Co., Ltd, Gyeonggi-do, Republic of Korea
| | - Hyeongkyun Na
- Center for Companion Biomarker, Seoul Clinical Laboratories Healthcare Co., Ltd, Gyeonggi-do, Republic of Korea
| | - Yun-Tae Kim
- Center for Technology Innovation, Seoul Clinical Laboratories, Gyeonggi-do, Republic of Korea
| | - Mi-Kyeong Lee
- Department of Molecular Diagnostics, Seoul Clinical Laboratories, Gyeonggi-do, Republic of Korea
| | - Jong Rak Choi
- Department of Laboratory Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Hwan-Sub Lim
- Department of Molecular Diagnostics, Seoul Clinical Laboratories, Gyeonggi-do, Republic of Korea
| | - Kyoung-Ryul Lee
- Center for Companion Biomarker, Seoul Clinical Laboratories Healthcare Co., Ltd, Gyeonggi-do, Republic of Korea; Department of Molecular Diagnostics, Seoul Clinical Laboratories, Gyeonggi-do, Republic of Korea; Center for Technology Innovation, Seoul Clinical Laboratories, Gyeonggi-do, Republic of Korea; Center for Clinical Trial, Seoul Clinical Laboratories, Gyeonggi-do, Republic of Korea.
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13
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Park HJ, Kim YT, Moon JY, Jin CE, Ko KH, Lee SH, Min O, Je YS, Lee M, Lee S, Kim YJ, Lee KR. Trend Analysis of the Profiles of 12 Sexually Transmitted Disease Pathogens in the Republic of Korea in 2019. INQUIRY 2021; 58:469580211065684. [PMID: 34930054 PMCID: PMC8721680 DOI: 10.1177/00469580211065684] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Background: Sexually transmitted diseases (STDs) are common infectious diseases in humans transmitted through unprotected sexual activities. In South Korea, despite the high annual incidence of STDs, detailed examinations of pathogen-specific factors and causes for delays in diagnosis and treatment are still lacking. Furthermore, STD prevalence patterns and important pathogen-specific factors remain unclear. Herein, we retrospectively analyzed the epidemiology of STDs in South Korea in 2019 by analyzing the association of pathogen-specific infection patterns with factors such as sex, age, region, and month. Methods: We obtained the STD test results of 172,973 individuals from the Seoul Clinic Laboratory in 2019, most of whom had multiple infections; hence, 275,296 STD-positive cases were included in this analysis. Through deoxyribonucleic acid (DNA) amplification, they were categorized by pathogen type. Subsequently, they were further classified by month, region, and age while concurrently being stratified according to sex. Results: Among the 12 pathogens detected in this study, Gardnerella vaginalis had the highest prevalence, with 92,490 cases in both sex groups; moreover, many of them were concurrently infected by two or more pathogens. The prevalence of STDs did not differ according to month or region. Conversely, the pathogen-specific prevalence rates significantly differed according to age. Older adults had higher prevalence rates of Chlamydia trachomatis, Trichomonas vaginalis, Candida albicans, and herpes simplex virus type 1 infections than younger adults. Conclusion: These pathogen-specific prevalence patterns provide information that helps to understand population vulnerability according to region and age and helps develop STD prevention and treatment strategies in South Korea.
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Affiliation(s)
- Hye-Jee Park
- R & D Innovation Center, Seoul Clinical Laboratories, Yongin, Republic of Korea
| | - Yun-Tae Kim
- R & D Innovation Center, Seoul Clinical Laboratories, Yongin, Republic of Korea
| | - Ju Young Moon
- R & D Innovation Center, Seoul Clinical Laboratories, Yongin, Republic of Korea
| | - Choong Eun Jin
- R & D Innovation Center, Seoul Clinical Laboratories, Yongin, Republic of Korea
| | - Ki-Han Ko
- R & D Innovation Center, Seoul Clinical Laboratories, Yongin, Republic of Korea
| | - Seung-hyun Lee
- R & D Innovation Center, Seoul Clinical Laboratories, Yongin, Republic of Korea
| | - Okgi Min
- Molecular Diagnosis, Seoul Clinical Laboratories, Yongin, Republic of Korea
| | - Young Soo Je
- Department of Laboratory Medicine, Center for Companion Biomarker, SCL Healthcare Inc, Yongin, Republic of Korea
| | - Mikyeong Lee
- Department of Laboratory Medicine, Center for Companion Biomarker, SCL Healthcare Inc, Yongin, Republic of Korea
| | - Sanghoo Lee
- Center for Companion Biomarker, SCL Healthcare Inc, Yongin, Republic of Korea
| | - Young-Jin Kim
- R & D Innovation Center, Seoul Clinical Laboratories, Yongin, Republic of Korea
| | - Kyoung-Ryul Lee
- R & D Innovation Center, Seoul Clinical Laboratories, Yongin, Republic of Korea
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14
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Leahy BD, Jang WD, Yang HY, Struyven R, Wei D, Sun Z, Lee KR, Royston C, Cam L, Kalma Y, Azem F, Ben-Yosef D, Pfister H, Needleman D. Automated Measurements of Key Morphological Features of Human Embryos for IVF. Med Image Comput Comput Assist Interv 2020; 12265:25-35. [PMID: 33313603 PMCID: PMC7732604 DOI: 10.1007/978-3-030-59722-1_3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A major challenge in clinical In-Vitro Fertilization (IVF) is selecting the highest quality embryo to transfer to the patient in the hopes of achieving a pregnancy. Time-lapse microscopy provides clinicians with a wealth of information for selecting embryos. However, the resulting movies of embryos are currently analyzed manually, which is time consuming and subjective. Here, we automate feature extraction of time-lapse microscopy of human embryos with a machine-learning pipeline of five convolutional neural networks (CNNs). Our pipeline consists of (1) semantic segmentation of the regions of the embryo, (2) regression predictions of fragment severity, (3) classification of the developmental stage, and object instance segmentation of (4) cells and (5) pronuclei. Our approach greatly speeds up the measurement of quantitative, biologically relevant features that may aid in embryo selection.
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Affiliation(s)
- B D Leahy
- School of Engineering and Applied Sciences,Harvard University, Cambridge MA 02138, USA
- Department of Molecular and Cellular Biology,Harvard University, Cambridge MA 02138, USA
| | - W-D Jang
- School of Engineering and Applied Sciences,Harvard University, Cambridge MA 02138, USA
| | - H Y Yang
- Harvard Graduate Program in Biophysics, Harvard University, Cambridge MA 02138, USA
| | - R Struyven
- School of Engineering and Applied Sciences,Harvard University, Cambridge MA 02138, USA
| | - D Wei
- School of Engineering and Applied Sciences,Harvard University, Cambridge MA 02138, USA
| | - Z Sun
- School of Engineering and Applied Sciences,Harvard University, Cambridge MA 02138, USA
| | - K R Lee
- Department of Molecular and Cellular Biology,Harvard University, Cambridge MA 02138, USA
| | - C Royston
- Department of Molecular and Cellular Biology,Harvard University, Cambridge MA 02138, USA
| | - L Cam
- Department of Molecular and Cellular Biology,Harvard University, Cambridge MA 02138, USA
| | - Y Kalma
- Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - F Azem
- Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - D Ben-Yosef
- Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - H Pfister
- School of Engineering and Applied Sciences,Harvard University, Cambridge MA 02138, USA
| | - D Needleman
- School of Engineering and Applied Sciences,Harvard University, Cambridge MA 02138, USA
- Department of Molecular and Cellular Biology,Harvard University, Cambridge MA 02138, USA
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15
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Lee KR, Jang SH, Jung I. Acoustic performance of dual-electrode electrostatic sound generators based on CVD graphene on polyimide film. Nanotechnology 2018; 29:325502. [PMID: 29786618 DOI: 10.1088/1361-6528/aac6ae] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We investigated the acoustic performance of electrostatic sound-generating devices consisting of bi-layer graphene on polyimide film. The total sound pressure level (SPL) of the sound generated from the devices was measured as a function of source frequency by sweeping, and frequency spectra were measured at 1/3 octave band frequencies. The relationship between various operation conditions and total SPL was determined. In addition, the effects of changing voltage level, adding a DC offset, and using two pairs of electrodes were evaluated. It should be noted that two pairs of electrode operations improved sound generation by about 10 dB over all frequency ranges compared with conventional operation. As for the sound-generating capability, total SPL was 70 dBA at 4 kHz when an AC voltage of 100 Vpp was applied with a DC offset of 100 V. Acoustic characteristics differed from other types of graphene-based sound generators, such as graphene thermoacoustic devices and graphene polyvinylidene fluoride devices. The effects of diameter and distance between electrodes were also studied, and we found that diameter greatly influenced the frequency response. We anticipate that the design information provided in this paper, in addition to describing key parameters of electrostatic sound-generating devices, will facilitate the commercial development of electrostatic sound-generating systems.
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16
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Abstract
Acute mesenteric ischaemia is a rare complication of calcium channel blocker (CCB) overdose. A previous study reported a case of mesenteric ischaemia induced by poisoning with CCBs other than diltiazem. We present a case of nonocclusive mesenteric ischaemia (NOMI) induced by diltiazem poisoning. Through this case report, we wish to emphasize that the clinicians should keep the possibility of intestinal ischaemia in mind from the early phase of calcium channel blocker poisoning. In addition, close monitoring and intense abdominal examination including the abdominal computed tomography scan should be done if CCBs poisoning patients complained of an abdominal pain.
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Affiliation(s)
- JW Kim
- Konkuk University School of Medicine, Department of Emergency Medicine, Konkuk University Medical Center, Seoul, Korea
| | - SO Park
- Konkuk University School of Medicine, Department of Emergency Medicine, Konkuk University Medical Center, Seoul, Korea
| | - DY Hong
- Konkuk University School of Medicine, Department of Emergency Medicine, Konkuk University Medical Center, Seoul, Korea
| | - KJ Baek
- Konkuk University School of Medicine, Department of Emergency Medicine, Konkuk University Medical Center, Seoul, Korea
| | - KR Lee
- Konkuk University School of Medicine, Department of Emergency Medicine, Konkuk University Medical Center, Seoul, Korea
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17
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Hong DY, Park SO, Lee KR, Baek KJ, Moon HW, Han SB, Shin DH. Bacterial Contamination of Computer and Hand Hygiene Compliance in the Emergency Department. HONG KONG J EMERG ME 2017. [DOI: 10.1177/102490791201900603] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Introduction The aim of this study was to determine the degree and nature of bacterial contamination of computer equipment in three Korean emergency departments (ED). Methods Hand hygiene practices of ED doctors and nurses were observed before contact with computer equipment. Microbiological swab samples were obtained from 112 multiple-user computer keyboards and electronic mice in the ED of three teaching hospitals. Isolated organisms were identified by a clinical microbiologist using Gram stain, colony morphology, and susceptibility test. Results Of the 112 samples, 103 (92.0%) showed growth of organisms on culture. Thirty-eight (33.9%) pieces of computer equipment yielded multiple bacterial species. Coagulase-negative Staphylococcus was the most common microorganism isolated (85.7%). Methicillin-resistant Staphylococcus aureus was obtained from two keyboards in two hospitals (1.8%). Hand hygiene compliance was observed on 29.9% occasions. Hand hygiene compliance after patient contact (38.0%) was higher than after other environmental contact (20.7%). Conclusions Multiple user computer equipment in the ED may serve as reservoirs for nosocomial infection. Hand hygiene should be performed before and after using all ED equipment, including computer equipment.
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Affiliation(s)
| | | | | | | | - HW Moon
- Konkuk University Medical Center, Department of Laboratory Medicine, Konkuk University School of Medicine, 120-1 Neugdong-ro, Hwayang-dong, Gwangjin-gu, Seoul, Republic of Korea, 143-729; Moon Hee Won, MD
| | - SB Han
- Inha University Hospital, Department of Emergency Medicine, 7-206 Sinheung-dong 3-ga, Jung-gu, Incheon, Republic of Korea, 400-711
| | - DH Shin
- Kangbuk Samsung Hospital, Department of Emergency Medicine, Sungkyunkwan University School of Medicine, 108-1 Pyeong-dong, Jongno-gu, Seoul, Republic of Korea, 110-746
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18
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Hong DY, Park SO, Lee KR, Baek KJ, Moon HW, Han SB, Shin DH. Bacterial Contamination of Computer and Hand Hygiene Compliance in the Emergency Department. HONG KONG J EMERG ME 2017. [DOI: 10.1177/102490791302000610] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Introduction The aim of this study was to determine the degree and nature of bacterial contamination of computer equipment in three Korean emergency departments (ED). Methods Hand hygiene practices of ED doctors and nurses were observed before contact with computer equipment. Microbiological swab samples were obtained from 112 multiple-user computer keyboards and electronic mice in the ED of three teaching hospitals. Isolated organisms were identified by a clinical microbiologist using Gram stain, colony morphology, and susceptibility test. Results Of the 112 samples, 103 (92.0%) showed growth of organisms on culture. Thirty-eight (33.9%) pieces of computer equipment yielded multiple bacterial species. Coagulase-negative Staphylococcus was the most common microorganism isolated (85.7%). Methicillin-resistant Staphylococcus aureus was obtained from two keyboards in two hospitals (1.8%). Hand hygiene compliance was observed on 29.9% occasions. Hand hygiene compliance after patient contact (38.0%) was higher than after other environmental contact (20.7%). Conclusions Multiple user computer equipment in the ED may serve as reservoirs for nosocomial infection. Hand hygiene should be performed before and after using all ED equipment, including computer equipment. (Hong Kong j.emerg.med. 2012;19:387-393)
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Affiliation(s)
| | | | | | | | - HW Moon
- Konkuk University Medical Center, Department of Laboratory Medicine, Konkuk University School of Medicine, 120-1 Neugdong-ro, Hwayang-dong, Gwangjin-gu, Seoul, Republic of Korea, 143-729
| | - SB Han
- Inha University Hospital, Department of Emergency Medicine, 7-206 Sinheung-dong 3-ga, Jung-gu, Incheon, Republic of Korea, 400-711
| | - DH Shin
- Kangbuk Samsung Hospital, Department of Emergency Medicine, Sungkyunkwan University School of Medicine, 108-1 Pyeong-dong, Jongno-gu, Seoul, Republic of Korea, 110-746
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19
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Kim HJ, Lim HS, Lee KR, Choi MH, Kang NM, Lee CH, Oh EJ, Park HK. Determination of Trace Metal Levels in the General Population of Korea. Int J Environ Res Public Health 2017; 14:ijerph14070702. [PMID: 28661432 PMCID: PMC5551140 DOI: 10.3390/ijerph14070702] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 06/27/2017] [Accepted: 06/27/2017] [Indexed: 12/14/2022]
Abstract
The purpose of this study was to determine the levels of trace metals in the blood of the general Korean population. A total of 258 healthy individuals, according to their regular medical check-ups, (119 males and 139 females, age ranging from 12 to 78 years old) were enrolled from December 2014 to December 2016. Levels of 10 trace elements were determined using inductively coupled plasma mass spectrometry (ICP-MS). The geometric mean (GM) levels for lead, arsenic, cesium, mercury, aluminum, cadmium, copper, manganese, selenium, and zinc were 15.97 μg/L, 7.19 μg/L, 2.39 μg/L, 3.41 μg/L, 10.57 μg/L, 0.78 μg/L, 979.8 μg/L, 11.06 μg/L, 111.37 μg/L, and 872.7 μg/L, respectively. There were significant gender-related differences in the levels of several metals; male individuals had higher Pb, As, Cs, Hg, and Se than females, while females had higher Cd, Cu, and Mn than males. We noticed remarkably high blood levels of Hg, As and Al in the Korean population. The element concentrations reported represent a new contribution to the knowledge of the blood chemistry for the Korea population. The data can be used to assess the clinical health of this population.
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Affiliation(s)
- Hyun-Jun Kim
- Departments of Obstetrics and Gynecology, Konkuk University School of Medicine, Chungju 27376, Korea.
| | - Hwan-Sub Lim
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Yongin 16954, Korea.
| | - Kyoung-Ryul Lee
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Yongin 16954, Korea.
| | - Mi-Hyun Choi
- Department of Biomedical Engineering, Research Institute of Biomedical Engineering, College of Science & Technology, Konkuk University, Chungju 27478, Korea.
| | | | - Chang Hoon Lee
- Department of Laboratory Medicine, Konkuk University School of Medicine, Chungju 27376, Korea.
| | - Eun-Jung Oh
- Department of Family Medicine, Konkuk University School of Medicine, Chungju 27376, Korea.
| | - Hyun-Kyung Park
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Yongin 16954, Korea.
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Park KJ, Park HK, Kim YJ, Lee KR, Park JH, Park JH, Park HD, Lee SY, Kim JW. DUOX2 Mutations Are Frequently Associated With Congenital Hypothyroidism in the Korean Population. Ann Lab Med 2017; 36:145-53. [PMID: 26709262 PMCID: PMC4713848 DOI: 10.3343/alm.2016.36.2.145] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Revised: 12/02/2015] [Accepted: 12/02/2015] [Indexed: 12/05/2022] Open
Abstract
Background Most cases with congenital hypothyroidism (CH) are usually sporadic, while about 20% of the cases are caused by genetic defects. Little information is available regarding the mutation incidence and genetic heterogeneity of CH in Koreans. We aimed to determine the mutation incidence of CH in newborn screenings (NBS) and to evaluate the frequency and spectrum of mutations underlying CH. Methods A total of 112 newborns with thyroid dysfunction were enrolled from 256,624 consecutive NBS. Furthermore, 58 outpatients with primary CH were added from an endocrine clinic. All coding exons of TSHR, PAX8, TPO, DUOX2, DUOXA2, and SCL5A5 were sequenced. Results The mutation incidence of CH was estimated to be 1 in 6,580 newborns. A total of 36 different mutations were identified in 53 cases. The overall mutation positive rate was 31%. The DUOX2 mutations were the most prevalent in both newborns and outpatients. Seven different recurrent mutations [p.G488R (n=13), p.A649E (n=3), p.R885Q (n=3), p.I1080T (n=2), and p.A1206T (n=2) in DUOX2; p.Y138X (n=9) in DUOXA2; and p.R450H (n=5) in TSHR) were identified as the mutations underlying CH. Conclusions The mutation incidence of CH was considerably higher than expected in the Korean newborn population. This study revealed seven different recurrent mutations underlying CH. We conclude that DUOX2 mutations are a frequent cause of CH in the Korean population.
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Affiliation(s)
- Kyoung-Jin Park
- Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences and Technology, Sungkyunkwan University, Seoul, Korea
| | - Hyun-Kyung Park
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Seoul Medical Science Institute, Seoul, Korea
| | - Young-Jin Kim
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Seoul Medical Science Institute, Seoul, Korea
| | - Kyoung-Ryul Lee
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Seoul Medical Science Institute, Seoul, Korea
| | - Jong-Ho Park
- Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences and Technology, Sungkyunkwan University, Seoul, Korea
| | - June-Hee Park
- Samsung Biomedical Research Institute, Samsung Medical Center, Seoul, Korea
| | - Hyung-Doo Park
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Soo-Youn Lee
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jong-Won Kim
- Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences and Technology, Sungkyunkwan University, Seoul, Korea.,Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
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Lee S, Kim JH, Kim SA, Sun YS, Lee A, Park SJ, Kim YT, Lee KR, Kim YJ. A Rapid and Simple Liquid-Chromatography-Tandem Mass Spectrometry Method for Measuring 25-Hydroxyvitamin D2 and 25-Hydroxyvitamin D3 in Human Serum: Comparison with Two Automated Immunoassays. Ann Clin Lab Sci 2016; 46:645-653. [PMID: 27993879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
BACKGROUND Total 25-hydroxyvitamin D (25(OH)D) is well-known to be a reliable biomarker of human vitamin D status, with the recognition of widespread vitamin D insufficiency in general populations. The aims of this study are to validate a fast and simple liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for quantifying 25(OH)D2 and 25(OH)D3 in serum and to compare two automated immunoassays with the LC-MS/MS method. METHODS Samples were prepared by protein precipitation with ethanol including 25(OH)D3-d6, followed by a liquid-liquid extraction with hexane. The analytes were separated within a total run time of 3 min. Accuracy was evaluated with standard reference materials (SRM) 972a. Using 150 samples, the LC-MS/MS method was compared with the LIAISON® assay and ADVIA Centaur® assay. RESULTS The LC-MS/MS method had a limit of quantitation of 1 ng/mL for the 25(OH)D2 and 25(OH)D3 with linear responses between 1 and 100 ng/mL. Intra- and inter-assay precision were <8.8% and <13.2%, respectively. It also showed a smallest mean difference (+0.9%) for the SRM level 1 to 3, compared to the two immunoassays. Compared to the LC-MS/MS, the mean biases of the RIAISON and ADVIA were +2.4 and +7.9 ng/mL, respectively. Also, the agreement of the LC-MS/MS with the RIAISON was better than that with the ADVIA. CONCLUSION This study suggests that the LC-MS/MS method traceable to the SRM can be reliably applied in routine quantification of 25(OH)D2 and 25(OH)D3.
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Affiliation(s)
- Sanghoo Lee
- Department of Bioanalysis, Seoul Medical Science Institute & Seoul Clinical Laboratories, Yongin, Korea
- Companion Biomarker Center, SCL Healthcare Inc., Yongin, Korea
| | - Joo-Hoon Kim
- Department of Bioanalysis, Seoul Medical Science Institute & Seoul Clinical Laboratories, Yongin, Korea
| | - Seol-A Kim
- Department of Bioanalysis, Seoul Medical Science Institute & Seoul Clinical Laboratories, Yongin, Korea
| | - Yeoun-Soo Sun
- Department of Diagnostic Immunology, Seoul Medical Science Institute & Seoul Clinical Laboratories, Yongin, Korea
| | - Anna Lee
- Department of Diagnostic Immunology, Seoul Medical Science Institute & Seoul Clinical Laboratories, Yongin, Korea
| | - Seo-Jin Park
- Department of Diagnostic Immunology, Seoul Medical Science Institute & Seoul Clinical Laboratories, Yongin, Korea
| | - Yun-Tae Kim
- Department of Bioanalysis, Seoul Medical Science Institute & Seoul Clinical Laboratories, Yongin, Korea
| | - Kyoung-Ryul Lee
- Department of Bioanalysis, Seoul Medical Science Institute & Seoul Clinical Laboratories, Yongin, Korea
- Companion Biomarker Center, SCL Healthcare Inc., Yongin, Korea
| | - Young-Jin Kim
- Department of Bioanalysis, Seoul Medical Science Institute & Seoul Clinical Laboratories, Yongin, Korea
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Lee A, Kim SH, Nam CM, Kim YJ, Joo SH, Lee KR. Prevalence of Vitamin D Deficiency and Insufficiency in Korean Children and Adolescents and Associated Factors. ACTA ACUST UNITED AC 2016. [DOI: 10.3343/lmo.2016.6.2.70] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Anna Lee
- Seoul Medical Science Institute, Yongin, Korea
| | - Se Hwi Kim
- Department of Biostatistics and Computing, The Graduate School of Yonsei University, Seoul, Korea
| | - Chung Mo Nam
- Department of Preventive Medicine, Yonsei University College of Medicine, Seoul, Korea
| | | | - Soo-Ho Joo
- Seoul Medical Science Institute, Yongin, Korea
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Lee SY, Shim SH, Youn JP, Kim SJ, Kim JH, Jung SA, Choi HJ, Oh MJ, Lee KR, Cha DH, Hwang SY. New application methods for chromosomal abnormalities screening test using digital PCR. BioChip J 2015. [DOI: 10.1007/s13206-015-9410-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Affiliation(s)
- D C Parks
- GlaxoSmithKline, Collegeville, PA, USA
| | - X Lin
- GlaxoSmithKline, Collegeville, PA, USA
| | - K R Lee
- GlaxoSmithKline, Collegeville, PA, USA
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Kim S, Chung HW, Lee KR, Lim JB. Identification of novel epitopes from human papillomavirus type 18 E7 that can sensitize PBMCs of multiple HLA class I against human cervical cancer. J Transl Med 2014; 12:229. [PMID: 25141788 PMCID: PMC4145224 DOI: 10.1186/s12967-014-0229-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Accepted: 08/11/2014] [Indexed: 12/31/2022] Open
Abstract
Background To identify the novel epitopes from the human papillomavirus type 18 E7 which can sensitize PBMCs of four different major HLA class I A allele. Methods Twenty-four synthetic overlapping 15-amino acid peptides were screened by measuring the frequency of CD8+ cytotoxic T lymphocytes (CTLs)-producing interferon-γ (IFN-γ) by using flow cytometry and ELISpot assays and selected peptides were validated for cytolytic activity by using the 51Cr release assay. Truncated peptides in the selected epitopes were tested to determine the important residues using ELISpot and 51Cr release assay. Results Among 24 peptides, E781-95DDLRAFQQLFLNTLS (#21) and E789-103LFLNTLSFVCPWCAS (#23) induced significantly higher Th 1 response including IFN-γ production and in vitro cytotoxicity of PBMCs of four different HLA-A alleles against cervical cancer cells than that of other peptides and the negative control (no peptide sensitization). In E781–95 (#21), amino acid position 81, 82 (N-terminus) and 92, 94, 95 (C-terminus) for HLA-A*02:02 and 24:02, and 81, 82 (N-terminus) and 92, 95 (C-terminus) for HLA-A*11:01 and 33:03 were important to elicit Th1 response of PBMCS. In E789–103 (#23), residue 100 and103 (C-terminus) were important to elicit the CD8+ CTL response in HLA-A*02:01, 11:01 and 33:03 and 100, 101, and 103 (C-terminus) were important to elicit the CD8+ CTL response in HLA-A*24:02. Conclusions E781–95 (#21) and E789–103 (#23) were identified as novel epitopes from HPV18 E7 which could sensitized PBMCs of four different HLA class I (HLA-A*02:01, 24:02, 11:01 and 33:03). These epitopes could be useful for immune monitoring and immunotherapy for HPV 18+ cervical cancer.
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Affiliation(s)
| | | | | | - Jong-Baeck Lim
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul 135-720, Republic of Korea.
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Lee S, Lim HS, Shin HJ, Kim SA, Park J, Kim HC, Kim H, Kim HJ, Kim YT, Lee KR, Kim YJ. Simultaneous determination of cortisol and cortisone from human serum by liquid chromatography-tandem mass spectrometry. J Anal Methods Chem 2014; 2014:787483. [PMID: 24729916 PMCID: PMC3963115 DOI: 10.1155/2014/787483] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 02/05/2014] [Accepted: 02/05/2014] [Indexed: 05/16/2023]
Abstract
A fast, sensitive, and selective liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was validated and then the levels of cortisol and cortisone from sera of healthy adults were determined by the LC-MS/MS method. One hundred μ L of serum sample was directly extracted by adding 2 mL ethyl acetate, followed by chromatographic separation on a C18 column with a mobile phase consisting of 5 mM ammonium acetate and methanol (25 : 75, v/v). The precision, accuracy, and average recovery of the method were 1.5-5.3%, 95.4-102.5%, and 96.4% for cortisol, and 1.9-6.0%, 89.2-98.8%, and 79.9% for cortisone, respectively. The method was linear from 1.0 to 500.0 ng/mL (r(2) = 0.999) for cortisol and 2.5 to 100.0 ng/mL (r(2) = 0.998) for cortisone. The limits of detection (LOD) and quantification (LOQ) were 0.2 and 1.0 ng/mL for cortisol, and 1.0 and 2.5 ng/mL for cortisone, respectively. The average cortisol concentration (133.9 ± 63.7 ng/mL) of samples collected between 9:00 and 11:00 a.m. was higher approximately 4.4 times than that of cortisone (30.5 ± 10.7 ng/mL) (P < 0.0001). The average cortisone/cortisol ratio was 0.225. Therefore, the LC-MS/MS method may be useful for the diagnosis of some adrenal diseases and the assessment of 11 β -hydroxysteroid dehydrogenase (11 β -HSD) activity in clinical laboratories.
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Affiliation(s)
- Sanghoo Lee
- Department of Bioanalysis, Seoul Medical Science Institute & Seoul Clinical Laboratories, Seoul 152-766, Republic of Korea
| | - Hwan-Sub Lim
- Department of Laboratory Medicine, Kwandong University College of Medicine, Gangneung 210-701, Republic of Korea
| | - Hye-Jin Shin
- Department of Bioanalysis, Seoul Medical Science Institute & Seoul Clinical Laboratories, Seoul 152-766, Republic of Korea
| | - Seol-A Kim
- Department of Bioanalysis, Seoul Medical Science Institute & Seoul Clinical Laboratories, Seoul 152-766, Republic of Korea
| | - Jimyeong Park
- Department of Bioanalysis, Seoul Medical Science Institute & Seoul Clinical Laboratories, Seoul 152-766, Republic of Korea
| | - Hyun-Chul Kim
- Department of Bioanalysis, Seoul Medical Science Institute & Seoul Clinical Laboratories, Seoul 152-766, Republic of Korea
| | - Hyogyeong Kim
- Department of Bioanalysis, Seoul Medical Science Institute & Seoul Clinical Laboratories, Seoul 152-766, Republic of Korea
| | - Hyung Joo Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 143-701, Republic of Korea
| | - Yun-Tae Kim
- Department of Bioanalysis, Seoul Medical Science Institute & Seoul Clinical Laboratories, Seoul 152-766, Republic of Korea
| | - Kyoung-Ryul Lee
- Department of Bioanalysis, Seoul Medical Science Institute & Seoul Clinical Laboratories, Seoul 152-766, Republic of Korea
| | - Young-Jin Kim
- Department of Bioanalysis, Seoul Medical Science Institute & Seoul Clinical Laboratories, Seoul 152-766, Republic of Korea
- *Young-Jin Kim:
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Lin YH, Liu YS, Lin YC, Wei YS, Liao KS, Lee KR, Lai JY, Chen HM, Jean YC, Liu CY. Decoupling free-carriers contributions from oxygen-vacancy and cation-substitution in extrinsic conducting oxides. J Appl Phys 2013; 113:33706. [PMID: 23405036 PMCID: PMC3562333 DOI: 10.1063/1.4776781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Accepted: 01/02/2013] [Indexed: 06/01/2023]
Abstract
The intrinsic oxygen-vacancies and the extrinsic dopants are two major fundamental free-carrier sources for the extrinsic conducting oxides, such as Sn-doped In(2)O(3). Yet, the individual contributions of the above two free-carrier sources to the total carrier concentrations have never been unraveled. A carrier-concentration separation model is derived in this work, which can define the individual contributions to the total carrier concentration from the intrinsic oxygen-vacancies and the extrinsic dopants, separately. The individual contributions obtained from the present carrier-concentration separation model are verified by the two-state trapping model, photoluminescence, and positron annihilation lifetime (PAL) spectroscopy. In addition, the oxygen-vacancy formation energy of the Sn:In(2)O(3) thin film is determined to be 0.25 eV by PAL spectroscopy.
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Lee YE, Lee KR, Jeon BK, Woo WH, Mun YJ. Dioscorea batatas stimulates procollagen production in vitro and reduces UVB‐induced MMPs secretion in vivo. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.lb54] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Young Eun Lee
- Food and NutritionWonkwang UniversityIksanKorea, Republic of
| | | | | | - Won-Hong Woo
- AnatomyWonkwang UniversityIksanKorea, Republic of
| | - Yeun-Ja Mun
- AnatomyWonkwang UniversityIksanKorea, Republic of
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Kanaev AV, Daniel BJ, Neumann JG, Kim AM, Lee KR. Object level HSI-LIDAR data fusion for automated detection of difficult targets. Opt Express 2011; 19:20916-20929. [PMID: 21997101 DOI: 10.1364/oe.19.020916] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Data fusion from disparate sensors significantly improves automated man-made target detection performance compared to that of just an individual sensor. In particular, it can solve hyperspectral imagery (HSI) detection problems pertaining to low-radiance man-made objects and objects in shadows. We present an algorithm that fuses HSI and LIDAR data for automated detection of man-made objects. LIDAR is used to define a set of potential targets based on physical dimensions, and HSI is then used to discriminate between man-made and natural objects. The discrimination technique is a novel HSI detection concept that uses an HSI detection score localization metric capable of distinguishing between wide-area score distributions inherent to natural objects and highly localized score distributions indicative of man-made targets. A typical man-made localization score was found to be around 0.5 compared to natural background typical localization scores being less than 0.1.
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Affiliation(s)
- A V Kanaev
- Naval Research Laboratory, 4555 Overlook Avenue, Washington, DC 20375, USA
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Jang S, Kim YT, Chung HW, Lee KR, Lim JB, Lee K. Identification of novel immunogenic human leukocyte antigen-A 2402-binding epitopes of human papillomavirus type 16 E7 for immunotherapy against human cervical cancer. Cancer 2011; 118:2173-83. [PMID: 21918960 DOI: 10.1002/cncr.26468] [Citation(s) in RCA: 11] [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] [Received: 04/27/2011] [Revised: 06/23/2011] [Accepted: 06/30/2011] [Indexed: 11/07/2022]
Abstract
BACKGROUND A study was undertaken to identify new immunogenic human leukocyte antigen (HLA)-A 2402-restricted epitopes from human papillomavirus (HPV) type 16 E7 protein for immunotherapy against cervical cancer. METHODS Synthetic overlapping peptides were screened by measuring the frequency of CD8(+) cytotoxic T lymphocytes (CTLs) producing intracellular interferon-γ (IFN-γ) using flow cytometry and were validated in SiHa cells with a Cr release cytotoxicity assay. In vivo antitumor effects of peptide-sensitized peripheral blood mononuclear cells (PBMCs) and isolated CD8(+) CTLs were evaluated using BALB/c nude mice with SiHa cell xenotransplants. RESULTS Among 14 overlapping 15-amino acid peptides, E7(61-75) (CDSTLRLCVQSTHVD) and E7(67-81) (LCVQSTHVDIRTLED) induced significantly higher IFN-γ production (P < .05) and showed higher in vitro cytotoxicity against SiHa cells than did cells sensitized with the negative control. To determine the exact HLA-A 2402-restricted epitopes, a total of 25 overlapping 9- or 10-amino acid peptides spanning E7(61-75) and E7(67-81) were synthesized. E7(61-69) (CDSTLRLCV) and E7(67-76) (LCVQSTHVDI) induced significantly greater IFN-γ production as well as increased in vitro cytotoxicity against SiHa cells compared with those of other peptides and the negative control (P < .01), and the antitumor effects of these peptide-sensitized PBMCs were induced by CD8(+) CTLs. E7(61-69) -sensitized and E7(67-76) -sensitized PBMCs and isolated CD8(+) CTLs showed a much greater suppression of tumor growth in vivo compared with that of control groups treated with PBS (P < .01). The authors also confirmed the synergistic antitumor effect of cisplatin followed by E7(67-76) -sensitized PBMCs in vivo. CONCLUSIONS E7(61-69) and E7(67-76) were identified as novel HPV type 16 E7 epitopes for HLA-A 2402, which could be used for immunotherapy against cervical cancer.
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Affiliation(s)
- Sunphil Jang
- Department of Laboratory Medicine, Yonsei University Medical College, Seoul, Republic of Korea
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Park HK, Lee KR, Kim YJ, Cho HI, Eun Kim J, Woong Kim K, Jung Kim Y, Lee KW, Hyun Kim J, Bang SM, Lee JS. Prevalence of monoclonal gammopathy of undetermined significance in an elderly urban Korean population. Am J Hematol 2011; 86:752-5. [PMID: 21786289 DOI: 10.1002/ajh.22095] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [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: 12/15/2010] [Revised: 04/11/2011] [Accepted: 05/27/2011] [Indexed: 11/07/2022]
Abstract
Research on the epidemiology of monoclonal gammopathy of undetermined significance (MGUS) is limited in Korea. The aim of this study was to determine the prevalence and characteristics of MGUS in an elderly urban Korean population. A random sample of 1118 Korean elders was selected from residents aged 65 years or older living in Seongnam, Korea 1 year from August 2005. We obtained plasma samples remaining after scheduled tests for the Korean Longitudinal Study on Health and Aging. The mean age of the study population was 72 years (range, 65-97 years). To screen for MGUS, immunofixation and free light-chain (FLC) assays were performed. Age-adjusted and gender-adjusted MGUS prevalence rates in 680 responders were estimated as 3.3% [95% confidence interval (CI) = 2.0-4.6%], and the estimated age-adjusted prevalence of MGUS was 4.3% in men (95% CI = 1.9-6.6%) and 2.6% in women (95% CI = 1.0-4.2%). Abnormal FLC ratios were detected in 10% of MGUS cases. Multivariate analysis of 945 participants revealed that significant risk factors for MGUS included advanced age, male sex, hyperproteinemia, increased erythrocyte sedimentation rate, and abnormal FLC ratio. MGUS is less prevalent among elderly Koreans (3.3%) than other races. This is the first study to estimate the prevalence of MGUS in the Korean elderly population. Our findings should be confirmed with additional studies analyzing follow-up samples from 2010.
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Affiliation(s)
- Hyun-Kyung Park
- Department of Laboratory Medicine, Seoul Clinical Laboratories, Seoul Medical Science Institute, Seoul, Republic of Korea
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Kim YT, Jang JH, Kim HC, Kim HG, Lee KR, Park KS, Lee HJ, Kim YJ. Identification of strain harboring both aac(6')-Ib and aac(6')-Ib-cr variant simultaneously in Escherichia coli and Klebsiella pneumoniae. BMB Rep 2011; 44:262-6. [DOI: 10.5483/bmbrep.2011.44.4.262] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Kwon SH, Shin HJ, Park JM, Lee KR, Kim YJ, Lee SH. Electrospray ionization tandem mass fragmentation pattern of camostat and its degradation product, 4-(4-guanidinobenzoyloxy)phenylacetic acid. Analytical Science and Technology 2011. [DOI: 10.5806/ast.2011.24.2.078] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Abstract
We reviewed 123 second-generation uncemented total hip replacements performed on 115 patients by a single surgeon between 1993 and 1994. The acetabular component used in all cases was a fully porous-coated threaded hemispheric titanium shell (T-Tap ST) with a calcium ion stearate-free, isostatically compression-moulded polyethylene liner. The titanium femoral component used was a Taperloc with a reduced distal stem. No patient was lost to follow-up. Complete clinical and radiological follow-up was obtained for all 123 hips at a mean of 14 years (12 to 16). One femoral component was revised after a fracture, and three acetabular components for aseptic loosening. No additional femoral or acetabular components were judged loose by radiological criteria. Mild proximal femoral osteolysis was identified in two hips and minor acetabular osteolysis was present in four. The mean rate of penetration of the femoral head was 0.036 mm/year (0.000 to 0.227). These findings suggest that refinements in component design may be associated with excellent long-term fixation in cementless primary total hip replacement.
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Affiliation(s)
- J R McLaughlin
- Mercy Medical Center, 2700 W Ninth Avenue, Suite 125, Oshkosh, Wisconsin 54904, USA.
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Shin HJ, Kwon SH, Park JM, Kwon SH, Lee KR, Kim YJ, Lee SH. Quantitative determination of inosine 5'-monophosphate dehydrogenase activity in human peripheral blood mononuclear cells by ion-pair reversed-phase high-performance liquid chromatography. Analytical Science and Technology 2010. [DOI: 10.5806/ast.2010.23.6.531] [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: 11/11/2022]
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Lee SH, Kwon SH, Shin HJ, Park JM, Lim HS, Lee KR, Kim YJ. Quantitative measurement of salivary testosterone in Korean adults by stable isotope-dilution liquid chromatographyelectrospray-tandem mass spectrometry. BMB Rep 2010; 43:761-5. [DOI: 10.5483/bmbrep.2010.43.11.761] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Lee SH, Kwon SH, Shin HJ, Lim HS, Singh RJ, Lee KR, Kim YJ. Simultaneous quantitative analysis of salivary cortisol and cortisone in Korean adults using LC-MS/MS. BMB Rep 2010; 43:506-11. [DOI: 10.5483/bmbrep.2010.43.7.506] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Lee HJ, Jeong HS, Cho BK, Ji MJ, Kim JH, Lee AN, Lee KR, Cheon DS. Evaluation of an immunochromatographic assay for the detection of anti-hepatitis A virus IgM. Virol J 2010; 7:164. [PMID: 20637129 PMCID: PMC2914673 DOI: 10.1186/1743-422x-7-164] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2010] [Accepted: 07/19/2010] [Indexed: 11/19/2022] Open
Abstract
Background Hepatitis A virus (HAV) is a causative agent of acute hepatitis, which is transmitted by person-to-person contact and via the faecal-oral route. Acute HAV infection is usually confirmed by anti-HAV IgM detection. In order to detect anti-HAV IgM in the serum of patients infected with HAV, we developed a rapid assay based on immunochromatography (ICA) and evaluated the sensitivity of this assay by comparing it with a commercial microparticle enzyme immunoassay (MEIA) that is widely used for serological diagnosis. Results The newly developed ICA showed 100% sensitivity and specificity when used to test 150 anti-HAV IgM-positive sera collected from infected patients and 75 negative sera from healthy subjects. Also, the sensitivity of ICA is about 10 times higher than MEIA used in this study by determining end point to detect independent on infected genotype of HAV. In addition, the ICA was able to detect 1 positive sample from among 50 sera from acute hepatitis patients that had tested negative for anti-HAV IgM using the MEIA. Conclusion Conclusively, ICA for the detection of anti-HAV IgM will be very effective for rapid assay to apply clinical diagnosis and epidemiological investigation on epidemics due to the simplicity, rapidity and specificity.
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Affiliation(s)
- Hyeok-Jin Lee
- Division of Enteric and Hepatitis Viruses, Center for Infectious Diseases, National Institute of Health, Korea Centers for Disease Control and Prevention, Seoul, South Korea.
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Lee A, Lim HS, Nam CM, Song SM, Yoon HR, Lee KR. [An epidemiological analysis of hepatitis A virus serologic markers during the recent four years in Korea]. Korean J Lab Med 2010; 29:563-9. [PMID: 20046089 DOI: 10.3343/kjlm.2009.29.6.563] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND To establish effective preventive measures for hepatitis A virus (HAV) infection, a nationwide epidemiologic study on seroprevalence of anti-HAV and the disease prevalence is needed. The aim of this study was to analyze the recent sero-epidemiological changes of hepatitis A markers in Korea. METHODS The results of 11,068 anti-HAV total and 32,360 anti-HAV IgM tests by electro-chemiluminescence immunoassay (ECLIA) that had been requested in recent four years (2005-2008) to a reference medical laboratory from 1,699 institutions nationwide were retrospectively analyzed according to the distribution of year, sex, and age groups. RESULTS The overall positive rate of anti-HAV total was 62.8%. The overall positive rate of anti-HAV IgM was 11.0%, showing a significantly increasing trend by year: 7.7%, 10.9%, 8.9%, and 14.3% in 2005, 2006, 2007, and 2008, respectively (P<0.0001). The positive rate of anti-HAV IgM was higher in male than in female subjects (11.8% vs 10.0%, P<0.0001), and 81.8% (2,916/3,566) of the anti-HAV IgM positive results were observed in the age groups of 21-40 yr. The annual positive rates of anti-HAV total and anti-HAV IgM showed significantly decreasing and increasing trends, respectively, in the age groups of > or = 21 yr. CONCLUSION In accordance with a decreasing sero-positivity of anti-HAV total, the prevalence of acute hepatitis A virus infection has been considerably increased during the recent four years in the age groups of > or = 21 yr. The results of this study could be used effectively as a basic data for establishing effective preventive measures for hepatitis A including vaccination in these susceptible age groups.
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Affiliation(s)
- Anna Lee
- Department of Laboratory Medicine, Seoul Medical Science Institute, Seoul, Korea
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Park JC, Kim JM, Kwon OJ, Lee KR, Chai YG, Oh HB. Development and clinical evaluation of a microarray for hepatitis C virus genotyping. J Virol Methods 2010; 163:269-75. [DOI: 10.1016/j.jviromet.2009.10.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2009] [Revised: 10/06/2009] [Accepted: 10/13/2009] [Indexed: 10/20/2022]
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Affiliation(s)
- O Y Kwon
- Department of Anatomy, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
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Song SM, Park YS, Lee A, Cho YG, Kim DS, Lee HS, Choi SI, Lee KR. Concentrations of Blood Vitamin A, C, E, Coenzyme Q10 and Urine Cotinine Related to Cigarette Smoking Exposure. Ann Lab Med 2009; 29:10-6. [DOI: 10.3343/kjlm.2009.29.1.10] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
| | | | - Anna Lee
- Seoul Clinical Laboratories, Seoul, Korea
| | - Yong Gon Cho
- Department of Laboratory Medicine, Chonbuk National University Medical School, Jeonju, Korea
| | - Dal Sik Kim
- Department of Laboratory Medicine, Chonbuk National University Medical School, Jeonju, Korea
| | - Hye Soo Lee
- Department of Laboratory Medicine, Chonbuk National University Medical School, Jeonju, Korea
| | - Sam Im Choi
- Department of Laboratory Medicine, Chonbuk National University Medical School, Jeonju, Korea
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Han SH, An JW, Jeong GY, Yoon HR, Lee A, Yang YH, Lee KP, Lee KR. Clinical and Cytogenetic Findings on 31,615 Mid-trimester Amniocenteses. Ann Lab Med 2008; 28:378-85. [DOI: 10.3343/kjlm.2008.28.5.378] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Sung-Hee Han
- Division of Cytogenetics, Department of Laboratory Medicine, Seoul Medical Science Institute, Seoul Clinical Laboratories, Seoul, Korea
| | - Jeong-Wook An
- Division of Cytogenetics, Department of Laboratory Medicine, Seoul Medical Science Institute, Seoul Clinical Laboratories, Seoul, Korea
| | - Gyu-Young Jeong
- Department of Laboratory Medicine, JungAng General Hospital, Jeju, Korea
| | - Hye-Ryoung Yoon
- Division of Cytogenetics, Department of Laboratory Medicine, Seoul Medical Science Institute, Seoul Clinical Laboratories, Seoul, Korea
| | - Anna Lee
- Division of Cytogenetics, Department of Laboratory Medicine, Seoul Medical Science Institute, Seoul Clinical Laboratories, Seoul, Korea
| | - Young-Ho Yang
- Division of Cytogenetics, Department of Laboratory Medicine, Seoul Medical Science Institute, Seoul Clinical Laboratories, Seoul, Korea
| | - Kyu-Pum Lee
- Division of Cytogenetics, Department of Laboratory Medicine, Seoul Medical Science Institute, Seoul Clinical Laboratories, Seoul, Korea
| | - Kyoung-Ryul Lee
- Division of Cytogenetics, Department of Laboratory Medicine, Seoul Medical Science Institute, Seoul Clinical Laboratories, Seoul, Korea
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Park YS, Park IC, You JS, Hong DY, Lee KR, Chung SP. Accuracy of Web-based recording program for in-hospital resuscitation: laboratory study. Emerg Med J 2008; 25:506-9. [PMID: 18660402 DOI: 10.1136/emj.2007.054569] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVE The purpose of this study was to assess the accuracy of a Web-based resuscitation recording program compared with the handwritten method. METHODS A Web site was developed to record in-hospital resuscitation events and a mock resuscitation was recorded using both the Web site and handwritten method by emergency nurses. Accurate recorded events and times were compared between the two methods through the use of a video clip. Paired t tests were used to compare differences in absolute timing error, the number of omitted events out of 11 reference events and total recorded events. RESULTS Twenty-one emergency nurses recorded simulated resuscitation events using both the handwritten and Web-based computerised recording system. The mean absolute timing errors were significantly lower using the computerised recording program (37.3 s (SD 17.1) versus 8.3 s (SD 5.3), p<0.001). The mean number of omissions for the computerised program was 1.8 (SD 0.8) compared with 1.4 (SD 1.1) for the handwritten method (p = 0.202). The mean number of total recorded events for the computerised program was 16.5 (SD 3.5) compared with 15.0 (SD 3.8) for the handwritten method (p = 0.063). CONCLUSIONS This study suggests that a Web-based recording program decreased timing error while causing no differences in the number of recorded or omitted events in a laboratory setting.
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Affiliation(s)
- Y S Park
- Department of Emergency Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
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Abstract
The effects of ozone and alkaline pretreatment of sewage sludge on the performances of membrane-coupled aerobic sludge digestion were investigated. In particular, the effects of sludge pretreatment on the solubilization, sludge biodegradation and the stability of membrane filtration were evaluated. Three sets of reactors were operated under different conditions of sludge treatment; 1) ozone treatment at 0.1 g O3 g(-1) suspended solids (SS) of the influent sludge, 2) alkaline treatment at pH 11.4-12.0, 3) no treatment. Without sludge pretreatment, 27% of suspended solids (SS) reduction was obtained at the hydraulic retention time(HRT) of 5 days. With ozone and alkaline treatment, the average SS reduction increased to 83 and 76%, respectively, at the same HRT. Membrane fouling occurred earliest with the non-treated sludge, followed by the alkali-treated sludge. With ozonated sludge, stable membrane filtration for more than 150 days was possible without chemical cleaning of the membrane. The dynamic viscosity of the mixed liquor in the reactor fed with ozonated sludge was relatively low, indicating the role of ozone treatment in controlling membrane fouling. In conclusion, sludge pretreatment followed by aerobic sludge digestion in a membrane-coupled bioreactor can achieve a very high rate of sludge reduction at a relatively short HRT.
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Affiliation(s)
- K R Lee
- Department of Civil & Environmental Engineering, SungKyunKwan University, Suwon, Korea
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Abstract
We studied a consecutive series of 285 uncemented total hip replacements in 260 patients using the Taperloc femoral component and the T-Tap acetabular component. The outcome of every hip was determined in both living and deceased patients. A complete clinical and radiological follow-up was obtained for 209 hips in 188 living patients, followed for a mean of 14.5 years (10 to 18.9). They were divided into two groups, obese and non-obese, as determined by their body mass index. There were 100 total hip replacements in 89 patients in the obese cohort (body mass index ≥ 30 kg/m2), and 109 in 99 non-obese (body mass index < 30 kg/m2) patients. A subgroup analysis of 31 patients of normal weight (body mass index 20 kg/m2 to 25 kg/m2) (33 hips) and 26 morbidly obese patients (body mass index ≥ 35 kg/m2) (30 hips) was also carried out. In the obese group five femoral components (5%) were revised and one (1%) was loose by radiological criteria. Femoral cortical osteolysis was seen in eight hips (8%). The acetabular component was revised in 57 hips (57%) and a further 17 (17%) were loose. The mean Harris hip score improved from 52 (30 to 66) pre-operatively to 89 (49 to 100) at final follow-up. Peri-operative complications occurred in seven patients (7%). In the non-obese group six (6%) femoral components were revised and one (1%) was loose. Femoral cortical osteolysis occurred in six hips (6%). The acetabular component was revised in 72 hips (66%) and a further 18 (17%) were loose. The mean Harris hip score increased from 53 (25 to 73) prior to surgery to 89 (53 to 100) at the time of each patient’s final follow-up radiograph. No statistically significant difference was identified between the obese and non-obese patients with regards to clinical and radiological outcome or complications. The subgroup analysis of patients of normal weight and those who were morbidly obese showed no statistically significant difference in the rate of revision of either component. Our findings suggest there is no evidence to support withholding total hip replacement from obese patients with arthritic hips on the grounds that their outcome will be less satisfactory than those who are not obese.
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Affiliation(s)
- J R McLaughlin
- Kennedy Center for the Hip and Knee, Mercy Medical Center, Oshkosh, Wisconsin 54904, USA.
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Kim BY, Lee DG, Lee KR, Han SH, Surendran S, Han CW, Chung N. Identification of BRCA1 and BRCA2 mutations from Korean breast cancer patients using denaturing HPLC. Biochem Biophys Res Commun 2006; 349:604-10. [PMID: 16949048 DOI: 10.1016/j.bbrc.2006.08.086] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [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: 08/13/2006] [Accepted: 08/15/2006] [Indexed: 11/18/2022]
Abstract
In order to investigate the presence and function of BRCA mutations in Korean breast cancer patients, mutational analyses using denaturing HPLC (DHPLC) were performed for 1020 breast cancer patients and 167 normal females. We identified 14 deleterious mutations that included 10 frameshift mutations and 4 nonsense mutations. Among these 14 mutations, we found 3 novel BRCA1 and 3 novel BRCA2 mutations. We found that BRCA deleterious mutations were present in 19 of the 1020 patients (1.8%). Three of the 14 deleterious mutations were detected in 7 of these 19 patients. The three mutations were also identified in other studies for BRCA mutations in the Korean population, suggesting that they are possible founder mutations of BRCA for the Korean population. We plan to provide fundamental data for larger population-based studies to establish the frequency and significance of BRCA mutations in Korean breast cancer patients.
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Affiliation(s)
- Bo-Young Kim
- Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
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Lee S, Kong DH, Yun SH, Lee KR, Lee KP, Franzblau SG, Lee EY, Chang CL. Evaluation of a modified antimycobacterial susceptibility test using Middlebrook 7H10 agar containing 2,3-diphenyl-5-thienyl-(2)-tetrazolium chloride. J Microbiol Methods 2006; 66:548-51. [PMID: 16563534 DOI: 10.1016/j.mimet.2006.02.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [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: 11/14/2005] [Revised: 02/03/2006] [Accepted: 02/09/2006] [Indexed: 11/22/2022]
Abstract
A rapid and accurate antimycobacterial susceptibility test is essential for effective treatment of tuberculosis. The aim of this study was to evaluate a modified method applying 2,3-diphenyl-5-thienyl-(2)-tetrazolium chloride (STC) to the Clinical and Laboratory Standards Institute (CLSI) guideline for susceptibility testing of Mycobacterium tuberculosis. A total of 132 clinical isolates of M. tuberculosis, forty-eight isolates showing resistance to one or more of the first-line antituberculosis drugs, and eighty-four fully susceptible isolates were collected from hospitals of a nationwide distribution from June to September 2004. The modified procedure was conducted basically according to the agar-proportion method described in the CLSI Guideline both with STC 50 mug/mL. The amount of growth in each well was recorded and graded at 2nd and 3rd weeks after inoculation. After 3 weeks of incubation, the diagnostic sensitivity and specificity for the detection of drug-resistant strains of STC-containing agar proportion methods were 100%, except ethambutol-low level resistance, of which the diagnostic sensitivity was 93.4%. After two weeks of incubation in STC-containing agar proportion methods, one hundred of the 107 strain-drug combinations have shown drug resistance, indicating the sensitivity of 93.5%. Especially, all 41 isoniazid-resistant strains and 19 of 21 rifampin-resistant strains (90.5%) could be detected after two weeks of incubation. A modification of the agar proportion method using STC resulted in a reliable and more easily interpretable data, and detected most of resistant strains a week earlier than conventional method.
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Affiliation(s)
- S Lee
- Seoul Medical Science Institute, Seoul Clinical Laboratories, Seoul, South Korea
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Kim BJ, Lee IH, Lee DH, Bai GH, Kong SJ, Lee SH, Moon HR, Lee KR, Lee JY, Park SK. The Current Status of Multidrug-resistant Tuberculosis in Korea. Tuberc Respir Dis (Seoul) 2006. [DOI: 10.4046/trd.2006.60.4.404] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
| | - In-Hee Lee
- National Masan Tuberculosis Hospital, Masan, Korea
| | | | | | - Suk-Jun Kong
- National Mokpo Tuberculosis Hospital, Mokpo, Korea
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Ahn DK, Lee KR, Lee HJ, Kim SK, Choi HS, Lim EJ, Park JS. Intracisternal administration of chemokines facilitated formalin-induced behavioral responses in the orofacial area of freely moving rats. Brain Res Bull 2005; 66:50-8. [PMID: 15925144 DOI: 10.1016/j.brainresbull.2005.03.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2005] [Revised: 03/30/2005] [Accepted: 03/31/2005] [Indexed: 11/24/2022]
Abstract
The present study investigated the effects of intracisternal administration of MCP-1, Rantes or IL-8 on pain transmission in the orofacial area. We also investigated mechanisms of hyperalgesic responses produced by intracisternal administration of IL-8. An orofacial formalin test was employed to assess the effects of chemokines on nociceptive processing. For each animal, the number of behavioral responses and the time spent grooming, rubbing and/or scratching the facial region proximal to the formalin injection site was recorded for nine successive 5-min intervals. Intracisternal administration of MCP-1, Rantes or IL-8 significantly increased formalin-induced scratching behavioral responses in the orofacial area. Intracisternal pretreatment with indomethacin, a non-selective cyclooxygenase inhibitor, did not block IL-8-induced hyperalgesia. Pretreatment with 100 microg propranolol, a non-selective beta-adrenergic receptor antagonist and 50 microg atenolol, a selective beta(1)-adrenergic receptor antagonist, inhibited the number of scratches and the duration of scratching produced by 1 ng of IL-8 injected intracisternally. These results indicate that intracisternal administration of chemokines produce a hyperalgesic response with an orofacial inflammatory pain model and that the IL-8-induced hyperalgesia is mediated by central beta(1)-adrenergic receptor.
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Affiliation(s)
- D K Ahn
- Department of Oral Physiology, School of Dentistry, Kyungpook National University, 188-1 Sam Deok 2ga, Chung-gu, Daegu 700-412, South Korea.
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