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Lee AY, Kong D, Cho H, Choi E, Hwang S, Song Y, Choi EK, Kim YB, Geum DH, Kim HY, Cho GJ, Ahn K, Oh MJ, Kim HJ, Hong SC. Investigating the regenerative effects of folic acid on human amniotic epithelial stem cells and amniotic pore culture technique (APCT) model in vitro using an integrated pharmacological-bioinformatic approach. Placenta 2023; 138:60-67. [PMID: 37196582 DOI: 10.1016/j.placenta.2023.04.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 04/02/2023] [Accepted: 04/18/2023] [Indexed: 05/19/2023]
Abstract
INTRODUCTION Disruption of fetal membranes before the onset of labor is referred to as premature rupture of membranes (PROM). Lack of maternal folic acid (FA) supplementation reportedly leads to PROM. However, there is a lack of information on the location of FA receptors in the amniotic tissue. Additionally, the regulatory role and potential molecular targets of FA in PROM in vitro have rarely been investigated. METHODS The three FA receptors (folate receptor α isoform [FRα], transporter of reduced folate [RFC], and proton-coupled folate transporter [PCFT]) in human amniotic epithelial stem cells (hAESCs) and amniotic tissue were localized using immunohistochemistry and immunocytochemistry staining. Effect and mechanism analyses of FA were performed in hAESCs and amniotic pore culture technique (APCT) models. An integrated pharmacological-bioinformatics approach was utilized to explore the potential targets of FA for the treatment of PROM. RESULTS The three FA receptors were widely expressed in human amniotic tissue, especially in the hAESC cytoplasm. FA stimulated the amnion regeneration in the in vitro APCT model. This mimics the PROM status, in which cystathionine-β-synthase, an FA metabolite enzyme, may play an important role. The top ten hub targets (STAT1, mTOR, PIK3R1, PTPN11, PDGFRB, ABL1, CXCR4, NFKB1, HDAC1, and HDAC2) of FA for preventing PROM were identified using an integrated pharmacological-bioinformatic approach. DISCUSSION FRα, RFC, and PCFT are widely expressed in human amniotic tissue and hAESCs. FA aids the healing of ruptured membrane.
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Affiliation(s)
- Ah-Young Lee
- Korea University College of Medicine, Seoul, Republic of Korea; College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea.
| | - Deqi Kong
- Korea University College of Medicine, Seoul, Republic of Korea.
| | - Heeryun Cho
- Korea University College of Medicine, Seoul, Republic of Korea.
| | - Eunsaem Choi
- Department of Obstetrics and Gynecology, Korea University College of Medicine, Seoul, Republic of Korea.
| | - Soowon Hwang
- Korea University College of Medicine, Seoul, Republic of Korea.
| | - Yuni Song
- Korea University College of Medicine, Seoul, Republic of Korea.
| | - Ehn-Kyoung Choi
- Central Research Institute, Designed Cells Co., Ltd., Cheongju, Republic of Korea.
| | - Yun-Bae Kim
- College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea.
| | - Dong Ho Geum
- Korea University College of Medicine, Seoul, Republic of Korea.
| | - Ho Yeon Kim
- Korea University College of Medicine, Seoul, Republic of Korea.
| | - Geum Joon Cho
- Korea University College of Medicine, Seoul, Republic of Korea.
| | - Kihoon Ahn
- Department of Obstetrics and Gynecology, Korea University College of Medicine, Seoul, Republic of Korea.
| | - Min-Jeong Oh
- Department of Obstetrics and Gynecology, Korea University College of Medicine, Seoul, Republic of Korea.
| | - Hai-Joong Kim
- Department of Obstetrics and Gynecology, Korea University College of Medicine, Seoul, Republic of Korea.
| | - Soon-Cheol Hong
- Korea University College of Medicine, Seoul, Republic of Korea; Department of Obstetrics and Gynecology, Korea University College of Medicine, Seoul, Republic of Korea.
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Muthusami A, Techaboonanake S, Desai N, Malik N, Reynolds M, Ahn K, De Carvalho L, Gawley M, Waraich N. 1602 A Quality Improvement Project on The Management of Patients with Traumatic Head Injury Presenting to A District General Hospital. Br J Surg 2021. [DOI: 10.1093/bjs/znab259.783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
Introduction
Traumatic Brain Injury (TBI) is associated with morbidity and mortality. All District General Hospitals (DGH) in West Midlands liaise with Neurosurgery centres for management of these patients through a referral system (NORSe). The aim of this study was to assess outcomes in TBI following the implementation of vital interventions.
Method
A retrospective data was collected between 1/1/2019 and 1/12/2020. We included all patients admitted with traumatic brain injury over the age of 16. We accessed the data from the hospital database, clinical notes, and NORSe. A re-audit was performed following implementations of recommendations (proforma and care of elderly input). Further data were collected prospectively.
Results
Our cohort included n1=61 patients (first cycle) and n2= 29 (second cycle). The demographic age and gender were comparable in both cycles. The median time for Neurosurgery advice was 229 minutes (IQR 60-690) in the first cycle as compared to 80 minutes (IQR 40-120, P < 0.05) and the main cause for delay was inadequate information transfer. The mortality rate was 24% (5 were attributed to sepsis), as compared to 14% in the second cycle. The median length of stay (LOS) was 4 days (IQR 3-13.5) in the first cycle, which translates to a cost of £26,815 per quarter. In comparison, LOS was 3 days (IQR 2-4), which translates to the cost of bed occupancy of £12,771 and saving of £14,043 per quarter, in the second cycle.
Conclusions
The introduction of simple interventions in a DGH can help to significantly improve patient outcomes in those admitted with Traumatic brain injury.
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Affiliation(s)
- A Muthusami
- Russells Hall Hospital, Dudley, United Kingdom
| | | | - N Desai
- Walsall Healthcare NHS Trust, Birmingham, United Kingdom
| | - N Malik
- Walsall Healthcare NHS Trust, Birmingham, United Kingdom
| | - M Reynolds
- Walsall Healthcare NHS Trust, Birmingham, United Kingdom
| | - K Ahn
- Walsall Healthcare NHS Trust, Birmingham, United Kingdom
| | - L De Carvalho
- Walsall Healthcare NHS Trust, Birmingham, United Kingdom
| | - M Gawley
- Walsall Healthcare NHS Trust, Birmingham, United Kingdom
| | - N Waraich
- Walsall Healthcare NHS Trust, Birmingham, United Kingdom
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Ahn K, Khan N, Desai N, Abdu M, Hiddema L, Odogwu S, Cheetham M, Pande R. 822 Lessons Learnt During the COVID-19 Pandemic on Emergency Surgical Admissions in A District General Hospital. Br J Surg 2021. [PMCID: PMC8135730 DOI: 10.1093/bjs/znab134.090] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Introduction Coronavirus disease (COVID-19) is an acute severe respiratory distress syndrome which resulted in an unprecedented impact on NHS service provision. We aimed to assess the impact of COVID-19 on general surgical services in a district general hospital. Method Electronic health care record data was retrospectively collected from 6th of April to 6th of May for both 2019 and 2020. Results Despite fewer referrals and admissions in 2020 (133 vs 177 admissions in 2019), there were more failed discharges (29 vs 17 in 2019) and higher associated costs. Higher numbers of biliary related pathologies and pancreatitis (50 in 2020 vs 25 in 2019), and fewer complaints of non-specific abdominal pain (10 in 2020 vs 22 in 2019) were observed. The use of outpatient investigations decreased by approximately 40% in 2020; however, utilisation of inpatient investigations was comparable. Conclusions Better utilisation of outpatient investigations and virtual clinic services may surmount pressures from further peaks of COVID-19. The increase in biliary related cases and pancreatitis may be consequent upon lifestyle changes during lockdown. This merits further investigation and if appropriate, public health intervention. In the absence of an efficacious vaccine, further research would be essential to streamline general surgical services based on clinical risk stratification.
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Affiliation(s)
- K Ahn
- Walsall Healthcare NHS Trust, Walsall, United Kingdom
| | - N Khan
- Walsall Healthcare NHS Trust, Walsall, United Kingdom
| | - N Desai
- Walsall Healthcare NHS Trust, Walsall, United Kingdom
| | - M Abdu
- Walsall Healthcare NHS Trust, Walsall, United Kingdom
| | - L Hiddema
- Walsall Healthcare NHS Trust, Walsall, United Kingdom
| | - S Odogwu
- Walsall Healthcare NHS Trust, Walsall, United Kingdom
| | - M Cheetham
- Shrewsbury and Telford Hospital NHS Trust, Shrewsbury, United Kingdom
| | - R Pande
- University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom
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Disher N, Robertson T, Duncan S, Grainger S, Ahn K, Hay C, Leighs T, Palmer J, Lim J, White T, Pemberton J, Iosua E, Hancox B, Coffey S. A061 Exercise Stress Echocardiography as Predictor for Major Adverse Cardiac Events: A Single Centre Retrospective Study. Heart Lung Circ 2020. [DOI: 10.1016/j.hlc.2020.05.066] [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: 11/26/2022]
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Kim J, Lee BS, Kim B, Na I, Lee J, Lee JY, Park MR, Kim H, Sohn I, Ahn K. Identification of atopic dermatitis phenotypes with good responses to probiotics (Lactobacillus plantarum CJLP133) in children. Benef Microbes 2018; 8:755-761. [PMID: 29035111 DOI: 10.3920/bm2017.0034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The therapeutic effect of probiotics in atopic dermatitis (AD) remains controversial and varies according to the individual patient. We aimed to identify a population of AD patients with a good clinical response to probiotic treatment. We recruited 76 children with a median age of 7.1 years who suffered from moderate to severe AD. After a 2-week washout period, all patients were given Lactobacillus plantarum CJLP133 at a dosage of 1×1010 colony-forming units once a day for 12 weeks. We measured eosinophil counts in the peripheral blood, the proportion of CD4+CD25+Foxp3+ regulatory T (Treg) cells in CD4+ T cells, serum total immunoglobulin E (IgE) levels, and specific IgE against common allergens before the start of the treatment (T1) and at discontinuation (T2). Responders were defined as patients with at least a 30% reduction in the SCORing of AD (SCORAD) index after treatment. There were 36 responders and 40 non-responders after probiotic treatment. The median SCORAD was reduced from 29.5 (range 20.6-46.3) at T1 to 16.4 (range 6.3-30.8) at T2 in the responder group (P<0.001). In multivariable logistic regression analysis, a good clinical response was significantly associated with high total IgE levels (aOR 5.1, 95% CI 1.1-23.6), increased expression of transforming growth factor (TGF)-β (aOR 4.6, 95% CI 1.3-15.9), and a high proportion of Treg cells in CD4+ T cells (aOR 3.7, 95% CI 1.1-12.7) at T1. In the responder group, the proportion of Treg cells was significantly increased after 12 weeks of treatment (P=0.004), while TGF-β mRNA expression was decreased (P=0.017). Our results suggest that a subgroup of patients with a specific AD phenotype showing an immunologically active state (high total IgE, increased expression of TGF-β, high numbers of Treg cells) may benefit from probiotic treatment with L. plantarum CJLP133.
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Affiliation(s)
- J Kim
- 1 Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnamgu, Seoul 06351, Republic of Korea.,2 Environmental Health Center for Atopic Diseases, Samsung Medical Center, Seoul, Republic of Korea
| | - B S Lee
- 2 Environmental Health Center for Atopic Diseases, Samsung Medical Center, Seoul, Republic of Korea
| | - B Kim
- 3 Beneficial Microbes R&D Center, CJ CheilJedang Corporation, Suwon, Republic of Korea
| | - I Na
- 2 Environmental Health Center for Atopic Diseases, Samsung Medical Center, Seoul, Republic of Korea
| | - J Lee
- 2 Environmental Health Center for Atopic Diseases, Samsung Medical Center, Seoul, Republic of Korea
| | - J Y Lee
- 1 Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnamgu, Seoul 06351, Republic of Korea.,2 Environmental Health Center for Atopic Diseases, Samsung Medical Center, Seoul, Republic of Korea
| | - M R Park
- 4 Department of Pediatrics, Sung-Ae Hospital, Seoul, Republic of Korea
| | - H Kim
- 5 Biostatistics and Clinical Epidemiology Center, Samsung Medical Center, Seoul, Republic of Korea
| | - I Sohn
- 5 Biostatistics and Clinical Epidemiology Center, Samsung Medical Center, Seoul, Republic of Korea
| | - K Ahn
- 1 Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnamgu, Seoul 06351, Republic of Korea.,2 Environmental Health Center for Atopic Diseases, Samsung Medical Center, Seoul, Republic of Korea
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Lee JY, Kim M, Yang HK, Kim HM, Cho J, Kim YM, Lim IS, Cheong HK, Kim HS, Sohn I, Kim J, Ahn K. Reliability and validity of the Atopic Dermatitis Symptom Score (ADSS). Pediatr Allergy Immunol 2018; 29:290-295. [PMID: 29350788 DOI: 10.1111/pai.12865] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/11/2018] [Indexed: 12/01/2022]
Abstract
BACKGROUND We have developed the Atopic Dermatitis Symptom Score (ADSS) by which patients or parents can easily assess and record AD symptoms on a daily basis in a smartphone application. The aim of this study was to evaluate the reliability and validity of the ADSS. METHODS We enrolled 307 children and adolescents with AD. Parents or caregivers were asked to record daily symptoms of the patients (itching, sleep disturbance, erythema, dryness, oozing, and edema) using a scale of 0-4. Statistical analyses consisted of the test-retest reliability, concurrent validity, minimal clinically important difference (MCID), responsiveness, floor or ceiling effects, and screening accuracy. Receiver-operating characteristic analyses were conducted to evaluate the ADSS cutoff point for predicting severe AD (SCORing AD [SCORAD] ≥40). RESULTS Test-retest reliability between daytime and night-time ADSS was good (intraclass correlation coefficient, 0.82 [95% CI: 0.70-0.90]). An increase in ADSS was significantly associated with an increase in SCORAD (r = 0.64, P < .0001) (concurrent validity). The MCID was 4.1 points for the ADSS. There was a significant association between changes in ADSS and SCORAD (r = 0.56, P < .0001), indicating good responsiveness. At the optimal ADSS cutoff value of 7.0, sensitivity, specificity, and positive and negative predictive values were 88.4%, 78.6%, 21.1%, and 99.1%, respectively (screening accuracy). CONCLUSIONS The ADSS can be a useful tool for self-assessment of skin symptoms in children with AD.
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Affiliation(s)
- J Y Lee
- Department of Pediatrics, Hallym University Hangang Sacred Heart Hospital, Seoul, Korea
| | - M Kim
- Department of Pediatrics, Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Korea
| | - H-K Yang
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - H M Kim
- Environmental Health Center for Atopic Diseases, Samsung Medical Center, Seoul, Korea
| | - J Cho
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Y-M Kim
- Environmental Health Center for Atopic Diseases, Samsung Medical Center, Seoul, Korea
| | - I S Lim
- Department of Pediatrics, Chung-Ang University Hospital, Seoul, Korea
| | - H-K Cheong
- Department of Social and Preventive Medicine, Sungkyunkwan University School of Medicine, Suwon, Korea.,Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - H S Kim
- Statistics and Data Center, Samsung Biomedical Research Institute, Seoul, Korea
| | - I Sohn
- Statistics and Data Center, Samsung Biomedical Research Institute, Seoul, Korea
| | - J Kim
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Environmental Health Center for Atopic Diseases, Samsung Medical Center, Seoul, Korea
| | - K Ahn
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Environmental Health Center for Atopic Diseases, Samsung Medical Center, Seoul, Korea
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Kim SH, Ahn K, Park JY. Responses of human adipose-derived stem cells to interstitial level of extremely low shear flows regarding differentiation, morphology, and proliferation. Lab Chip 2017; 17:2115-2124. [PMID: 28541365 DOI: 10.1039/c7lc00371d] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Human cells encounter a range of shear stress levels in situ and this natural variability in shear stress implies that realistic investigations of cell type characteristics may depend on nontrivial shear stress models. Human adipose-derived stem cells (hASCs) differentiate near the blood capillary vessels where interstitial flows predominate. However, the effects of interstitial levels of shear on hASCs are not fully understood. In this study, we propose a microfluidic shear generation system, in which a gradient distribution of the interstitial level of shear flow is created to investigate the effects of interstitial-level shear flow on hASCs. To generate such a gradient profile of interstitial-level shear stress, we fabricated a semicircle-shaped microfluidic channel, and generated an extremely low flow using an osmosis-driven pump. Changes to hASC morphology, proliferation, and differentiation were observed under shear stresses of 1.8 × 10-3-2.4 × 10-3 Pa. At higher shear stresses, we found higher proliferation rates, stronger actin structures, and lower differentiation. We also conducted computational simulations of a monolayer culture, which showed that the shear stress level even on a single cell varies owing to the change of the cell thickness between the pseudopodia and the nucleus. We found that hASCs detectably respond to extremely low levels of shear flow, above a threshold of ∼2.0 × 10-3 Pa. Our microplatform may be useful for quantitating biological responses and function changes of other stem cells and cancer cells to interstitial-level shear flows.
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Affiliation(s)
- Sung-Hwan Kim
- School of Mechanical Engineering, College of Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea.
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Nam T, Jeong J, Ahn K, Kim Y, Yoon M, Song J, Ahn S, Chung W. EP-1264: Metabolic response and change in CEA level in rectal cancer patients treated with neoadjuvant CRT. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31699-7] [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: 11/28/2022]
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9
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Jeong K, Lee SY, Ahn K, Kim J, Lee HR, Suh DI, Pyun BY, Min TK, Kwon JW, Kim KE, Kim KW, Sohn MH, Kim YH, Song TW, Kwon JH, Jeon YH, Kim HY, Kim JH, Ahn YM, Lee S. A multicenter study on anaphylaxis caused by peanut, tree nuts, and seeds in children and adolescents. Allergy 2017; 72:507-510. [PMID: 27892597 DOI: 10.1111/all.13096] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/21/2016] [Indexed: 11/29/2022]
Abstract
Peanut (PN) and tree nuts (TNs) are common causes of anaphylaxis in Western countries, but no information is available in Korea. To feature clinical characteristics of anaphylaxis caused by PN, TNs, and seeds, a retrospective medical record review was performed in 14 university hospitals in Korea (2009-2013). One hundred and twenty-six cases were identified, with the mean age of 4.9 years. PN, walnut (WN), and pine nut accounted for 32.5%, 41.3%, and 7.1%, respectively. The median values of specific IgE (sIgE) to PN, WN, and pine nut were 10.50, 8.74, and 4.61 kUA /l, respectively. Among 50 cases managed in the emergency department, 52.0% were treated with epinephrine, 66.0% with steroid, 94.0% with antihistamines, 36.0% with oxygen, and 48.0% with bronchodilator. In conclusion, WN, PN, and pine nut were the three most common triggers of anaphylaxis in Korean children, and anaphylaxis could occur at remarkably low levels of sIgE.
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Affiliation(s)
- K. Jeong
- Department of Pediatrics; Ajou University School of Medicine; Suwon Korea
| | - S.-Y. Lee
- Department of Pediatrics; Hallym University Sacred Heart Hospital; Hallym University College of Medicine; Anyang Korea
| | - K. Ahn
- Department of Pediatrics; Samsung Medical Center; Sungkyunkwan University School of Medicine; Seoul Korea
| | - J. Kim
- Department of Pediatrics; Samsung Medical Center; Sungkyunkwan University School of Medicine; Seoul Korea
| | - H.-R. Lee
- Department of Pediatrics; Hallym University Sacred Heart Hospital; Hallym University College of Medicine; Anyang Korea
| | - D. I. Suh
- Department of Pediatrics; Seoul National University Hospital; Seoul Korea
| | - B.-Y. Pyun
- Department of Pediatrics; Soonchunhyang University Hospital; Seoul Korea
| | - T. K. Min
- Department of Pediatrics; Soonchunhyang University Hospital; Seoul Korea
| | - J.-W. Kwon
- Department of Pediatrics; Seoul National University Bundang Hospital; Seongnam Korea
| | - K.-E. Kim
- Department of Pediatrics; Severance Hospital; Institute of Allergy; Yonsei University College of Medicine; Seoul Korea
| | - K. W. Kim
- Department of Pediatrics; Severance Hospital; Institute of Allergy; Yonsei University College of Medicine; Seoul Korea
| | - M. H. Sohn
- Department of Pediatrics; Severance Hospital; Institute of Allergy; Yonsei University College of Medicine; Seoul Korea
| | - Y. H. Kim
- Department of Pediatrics; Severance Hospital; Institute of Allergy; Yonsei University College of Medicine; Seoul Korea
| | - T. W. Song
- Department of Pediatrics; Inje University Ilsan Paik Hospital; Goyang Korea
| | - J. H. Kwon
- Department of Pediatrics; Korea University College of Medicine; Ansan Korea
| | - Y. H. Jeon
- Department of Pediatrics; Dongtan Sacred Heart Hospital; Hallym University College of Medicine; Hwaseong Korea
| | - H. Y. Kim
- Department of Pediatrics; Pusan National University Children's Hospital; Yangsan Korea
| | - J. H. Kim
- Department of Pediatrics; Inha University Hospital; Incheon Korea
| | - Y. M. Ahn
- Department of Pediatrics; Eulji Hospital; Eulji University School of Medicine; Seoul Korea
| | - S. Lee
- Department of Pediatrics; Ajou University School of Medicine; Suwon Korea
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Becker M, Meyer F, Jeong MJ, Ahn K, Henniges U, Potthast A. The museum in a test tube – Adding a third dimension to the evaluation of the impact of volatile organic acids on paper. Polym Degrad Stab 2016. [DOI: 10.1016/j.polymdegradstab.2016.05.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Koh Y, Seul H, Seo J, Kim H, Ahn K, Kang H, Han B, Kim H, Jang G, Seo J, Kim K, Na H, Choi S, Cho J, Zang D. Investigation on Korean gastric tumorigenesis by performing whole transcriptome and miRNA sequence analysis. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)61102-4] [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: 10/21/2022]
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Kim J, Han Y, Ahn JH, Kim SW, Lee SI, Lee KH, Ahn K. Airborne formaldehyde causes skin barrier dysfunction in atopic dermatitis. Br J Dermatol 2016; 175:357-63. [PMID: 27535603 DOI: 10.1111/bjd.14357] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/27/2015] [Indexed: 12/24/2022]
Abstract
BACKGROUND It remains to be elucidated whether exposure to air pollutants aggravates atopic dermatitis (AD). OBJECTIVES This study aimed to evaluate the effects of exposure to formaldehyde for 1 h and 2 h on skin barrier function in both the control and the AD groups. METHODS In 41 patients with AD and 34 healthy children, a provocation test was performed in which two different areas of normal-appearing skin on the forearm were stimulated with airborne formaldehyde at 500 μg m(-3) or placebo for 2 h. We measured transepidermal water loss (TEWL) and skin pH, and calculated the percentage change from baseline. RESULTS Exposure to formaldehyde increased TEWL in the control group [P < 0·001; median of difference 1·4; interquartile range (IQR) 0·9-1·6] and in the AD group (P < 0·001; median of difference 2·5; IQR 2·0-3·6). The percentage change of TEWL after formaldehyde exposure in the AD group was higher than in the control group (P < 0·001), whereas exposure to placebo showed no differences between both groups. The AD group also demonstrated a higher percentage increase in skin pH after exposure to formaldehyde than the control group (P < 0·001). CONCLUSIONS Short-term exposure to formaldehyde causes skin barrier dysfunction in both healthy children and children with AD, and this effect is more prominent in children with AD.
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Affiliation(s)
- J Kim
- Department of Pediatrics, Samsung Medical Centre, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 135-710, Korea.,Environmental Health Centre for Atopic Diseases, Samsung Medical Centre, Seoul, Korea
| | - Y Han
- Environmental Health Centre for Atopic Diseases, Samsung Medical Centre, Seoul, Korea
| | - J H Ahn
- Biostatistics Team, Samsung Biomedical Research Institute, Seoul, Korea
| | - S W Kim
- Biostatistics Team, Samsung Biomedical Research Institute, Seoul, Korea
| | - S I Lee
- Department of Pediatrics, Samsung Medical Centre, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 135-710, Korea
| | - K H Lee
- Korea Institute of Toxicology, Jeongeup, Jeollabuk-do, Korea
| | - K Ahn
- Department of Pediatrics, Samsung Medical Centre, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 135-710, Korea.,Environmental Health Centre for Atopic Diseases, Samsung Medical Centre, Seoul, Korea
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13
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Ahn K, Kim SH, Lee GH, Lee S, Heo YS, Park JY. Features of Microsystems for Cultivation and Characterization of Stem Cells with the Aim of Regenerative Therapy. Stem Cells Int 2016; 2016:6023132. [PMID: 26941802 PMCID: PMC4752999 DOI: 10.1155/2016/6023132] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 04/24/2015] [Revised: 11/13/2015] [Accepted: 12/01/2015] [Indexed: 01/17/2023] Open
Abstract
Stem cells have infinite potential for regenerative therapy thanks to their advantageous ability which is differentiable to requisite cell types for recovery and self-renewal. The microsystem has been proved to be more helpful to stem cell studies compared to the traditional methods, relying on its advantageous feature of mimicking in vivo cellular environments as well as other profitable features such as minimum sample consumption for analysis and multiprocedures. A wide variety of microsystems were developed for stem cell studies; however, regenerative therapy-targeted applications of microtechnology should be more emphasized and gain more attractions since the regenerative therapy is one of ultimate goals of biologists and bioengineers. In this review, we introduce stem cell researches harnessing well-known microtechniques (microwell, micropattern, and microfluidic channel) in view point of physical principles and how these systems and principles have been implemented appropriately for characterizing stem cells and finding possible regenerative therapies. Biologists may gain information on the principles of microsystems to apply them to find solutions for their current challenges, and engineers may understand limitations of the conventional microsystems and find new chances for further developing practical microsystems. Through the well combination of engineers and biologists, the regenerative therapy-targeted stem cell researches harnessing microtechnology will find better suitable treatments for human disorders.
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Affiliation(s)
- Kihoon Ahn
- School of Mechanical Engineering, College of Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Sung-Hwan Kim
- School of Mechanical Engineering, College of Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Gi-Hun Lee
- School of Mechanical Engineering, College of Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
| | - SeungJin Lee
- School of Mechanical Engineering, College of Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Yun Seok Heo
- Department of Biomedical Engineering, School of Medicine, Keimyung University, Daegu 42601, Republic of Korea
| | - Joong Yull Park
- School of Mechanical Engineering, College of Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
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14
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Ahn K, An SS, Shugart YY, Rapoport JL. Common polygenic variation and risk for childhood-onset schizophrenia. Mol Psychiatry 2016; 21:94-6. [PMID: 25510512 DOI: 10.1038/mp.2014.158] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 10/02/2014] [Accepted: 10/09/2014] [Indexed: 12/16/2022]
Abstract
Childhood-onset schizophrenia (COS) is a rare and severe form of the disorder, with more striking abnormalities with respect to prepsychotic developmental disorders and abnormities in the brain development compared with later-onset schizophrenia. We previously documented that COS patients, compared with their healthy siblings and with adult-onset patients (AOS), carry significantly more rare chromosomal copy number variations, spanning large genomic regions (>100 kb) (Ahn et al. 2014). Here, we interrogated the contribution of common polygenic variation to the genetic susceptibility for schizophrenia. We examined the association between a direct measure of genetic risk of schizophrenia in 130 COS probands and 103 healthy siblings. Using data from the schizophrenia and autism GWAS of the Psychiatric Genomic Consortia, we selected three risk-related sets of single nucleotide polymorphisms from which we conducted polygenic risk score comparisons for COS probands and their healthy siblings. COS probands had higher genetic risk scores of both schizophrenia and autism than their siblings (P<0.05). Given the small sample size, these findings suggest that COS patients have more salient genetic risk than do AOS.
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Affiliation(s)
- K Ahn
- Childhood Psychiatry Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA
| | - S S An
- Department of Environmental Health Sciences, Johns Hopkins University, Bloomberg School of Public Health, Baltimore, MD, USA
| | - Y Y Shugart
- Unit of Statistical Genomics, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA
| | - J L Rapoport
- Childhood Psychiatry Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA
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15
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Ahn K, Oh J, Park K, Kim M, Jin S, Kim J, Lee J, Choi S, Seong I, Jeong J. PP.06.23. J Hypertens 2015. [DOI: 10.1097/01.hjh.0000467897.73588.01] [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: 11/25/2022]
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16
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Zweckmair T, Becker M, Ahn K, Hettegger H, Kosma P, Rosenau T, Potthast A. A novel method to analyze the degree of acetylation in biopolymers. J Chromatogr A 2014; 1372C:212-220. [DOI: 10.1016/j.chroma.2014.10.082] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 10/20/2014] [Accepted: 10/25/2014] [Indexed: 10/24/2022]
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17
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Fichna J, Sałaga M, Stuart J, Saur D, Sobczak M, Zatorski H, Timmermans JP, Bradshaw HB, Ahn K, Storr MA. Selective inhibition of FAAH produces antidiarrheal and antinociceptive effect mediated by endocannabinoids and cannabinoid-like fatty acid amides. Neurogastroenterol Motil 2014; 26:470-81. [PMID: 24460851 DOI: 10.1111/nmo.12272] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2013] [Accepted: 11/08/2013] [Indexed: 12/21/2022]
Abstract
BACKGROUND The endogenous cannabinoid system (ECS) plays a crucial role in multiple physiological processes in the central nervous system and in the periphery. The discovery that selective cannabinoid (CB) receptor agonists exert a potent inhibitory action on gastrointestinal (GI) motility and pain has placed the ECS in the center of attention as a possible target for the treatment of functional GI diseases. However, side effects of CB agonists prompted the search for novel therapeutic targets. Here, the effect of PF-3845, a potent and selective fatty acid amide hydrolase (FAAH) inhibitor in the GI tract was investigated. METHODS The effect of PF-3845 on GI motility was characterized in vitro and in vivo, using mouse models that mimic physiological and pathophysiological conditions. The antinociceptive action of PF-3845 was evaluated on the basis of behavioral pain models. Endocannabinoid degradation product levels after inhibition of FAAH were quantified using HPLC-MS/MS. KEY RESULTS PF-3845 significantly inhibited mouse colonic motility in vitro and in vivo. Selective inhibition of FAAH reversed hypermotility and reduced pain in mouse models mimicking functional GI disorders. The effects of PF-3845 were mediated by endogenous CBs and non-CB lipophilic compounds via classical (CB1) and atypical CB receptors. CONCLUSIONS & INFERENCES These data expand our understanding of the ECS function and provide a novel framework for the development of future potential treatments of functional GI disorders.
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Affiliation(s)
- J Fichna
- Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada; Department of Medicine, Division of Gastroenterology, University of Calgary, Calgary, AB, Canada; Department of Biomolecular Chemistry, Faculty of Medicine, Medical University of Lodz, Lodz, Poland
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18
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Hahm MI, Chae Y, Kwon HJ, Kim J, Ahn K, Kim WK, Lee SY, Park YM, Han MY, Lee KJ, Lee HY, Min I. Do newly built homes affect rhinitis in children? The ISAAC phase III study in Korea. Allergy 2014; 69:479-87. [PMID: 24428419 DOI: 10.1111/all.12355] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/02/2013] [Indexed: 11/27/2022]
Abstract
BACKGROUND As Korea has experienced rapid economic development, the lifestyles of Koreans have become more Westernized, in terms of urbanization and dietary habits. Also, the prevalences of allergic diseases, such as rhinitis, asthma, and dermatitis, have increased rapidly. This study aimed to identify the factors influencing the symptoms of rhinitis conditions, including rhinitis, allergic rhinitis, overlapped rhinitis, and overlapped allergic rhinitis, among Korean children aged 6-7 years. METHODS The study subjects were drawn from participants in the International Study of Asthma and Allergies in Childhood (ISAAC) study in 2010 and were aged 6-7 years. We analysed data for a total of 3804 children. RESULTS The prevalences of symptoms suggestive of rhinitis and allergic rhinitis in the previous 12 months were 43.4% and 22.1%, respectively. For overlapped rhinitis and overlapped allergic rhinitis, only 2.5% and 1.9% of the children had overlapping symptoms, having rhinitis with asthma and eczema simultaneously. Gender, a parental history of allergic disease, mould or dampness at home, and the risk factors for 'sick building syndrome' (SBS) were risk factors influencing rhinitis diseases. In particular, a history of moving to a newly built home in the child's infancy was strongly associated with symptoms of all the rhinitis diseases examined. CONCLUSIONS This study identified patterns of the prevalence of rhinitis conditions among Korean children that were similar to those reported in Western countries. We confirmed that a history of moving to a newly built home during infancy was associated with a considerable risk of rhinitis conditions.
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Affiliation(s)
- M.-I. Hahm
- Department of Health Administration and Management; College of Medical Science; Soonchunhyang University; Asan Korea
| | - Y. Chae
- Department of Occupational and Environmental Medicine; Dankook University Hospital; Cheonan Korea
| | - H.-J. Kwon
- Department of Preventive Medicine; Dankook University College of Medicine; Cheonan Korea
| | - J. Kim
- Department of Pediatrics; Samsung Medical Center; Environmental Health Center for Atopic Diseases; Sungkyunkwan University School of Medicine; Seoul Korea
| | - K. Ahn
- Department of Pediatrics; Samsung Medical Center; Environmental Health Center for Atopic Diseases; Sungkyunkwan University School of Medicine; Seoul Korea
| | - W.-K. Kim
- Department of Pediatrics; Inje University College of Medicine; Seoul Korea
| | - S.-Y. Lee
- Department of Pediatrics; Hallym Sacred Heart Hospital; Hallym University College of Medicine; Anyang Korea
| | - Y. M. Park
- Department of Pediatrics; Konkuk University Hospital; Konkuk University School of Medicine; Seoul Korea
| | - M. Y. Han
- Department of Pediatrics; CHA University School of Medicine; Seongnam Korea
| | - K.-J. Lee
- Department of Information and Statistics; Korea National Open University; Seoul Korea
| | - H.-Y. Lee
- Department of Social Medicine; Dankook University College of Medicine; Cheonan Korea
| | - I. Min
- Department of Health Administration and Management; College of Medical Science; Soonchunhyang University; Asan Korea
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Shepherd J, Ahn K, Kantartzis K, Bonidie M, Lee T. Minimizing Hysterectomy Costs Transitioning from Open to Minimally Invasive Techniques. J Minim Invasive Gynecol 2014. [DOI: 10.1016/j.jmig.2013.12.018] [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: 11/26/2022]
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20
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Park S, Park J, Lee H, Jin S, Ahn K, Kim J, Lee J, Choi S, Jeong J, Seong I, Hoogslag G, Haeck M, Boden H, Katsanos S, Al Amri I, Debonnaire P, Schalij M, Bax J, Ajmone Marsan N, Delgado V, Hoogslag G, Haeck M, Velders M, Joyce E, Boden H, Schalij M, Bax J, Ajmone Marsan N, Delgado V, Ismail MF, Alasfar A, Sallam A, Ibrahim M, Cavalcante J, Abu-Mafouz M, Shaikh K, Ananthasubramaniam K. Oral Abstract session * The right heart ischemic disease: 12/12/2013, 11:00-12:30 * Location: Bursa. Eur Heart J Cardiovasc Imaging 2013. [DOI: 10.1093/ehjci/jet219] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Kim J, Park MR, Kim DS, Lee JO, Maeng SH, Cho SY, Han Y, Ahn K, Jin DK. IgE-mediated anaphylaxis and allergic reactions to idursulfase in patients with Hunter syndrome. Allergy 2013; 68:796-802. [PMID: 23621439 DOI: 10.1111/all.12155] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/22/2013] [Indexed: 12/26/2022]
Abstract
BACKGROUND Enzyme replacement therapy (ERT) with recombinant human idursulfase is effective for the treatment of Hunter syndrome, mucopolysaccharidosis (MPS) type II. However, various adverse events can occur by the infusion of idursulfase. The purpose was to evaluate the occurrence of infusion-related allergic reactions, including anaphylaxis, to idursulfase in patients with MPS II receiving ERT and to elucidate its possible mechanism. METHODS A total of 34 patients with MPS II were enrolled to receive ERT with Elaprase(®) at a dose of 0.5 mg/kg intravenously once a week. Information regarding the symptoms, frequency, and timing of anaphylaxis during treatment was analyzed. Presence of anti-idursulfase IgE antibody was assessed by skin prick test (SPT) and enzyme-linked immunosorbent assay (ELISA). Western blotting was performed to confirm the reaction between idursulfase and specific IgE. RESULTS Three patients (8.8%) showed anaphylaxis by infusion of idursulfase. No deaths occurred during the study. Anti-idursulfase IgE antibody was detected by SPT and ELISA. Immunoblotting with patients' sera and Elaprase(®) showed a single band of specific IgE binding to the protein around 70 kD, and idursulfase did not display amino acid sequence homology to known allergens. SPT with idursulfase demonstrated positive results in all patients with anaphylaxis. However, we failed to reveal any risk factors for the development of infusion-related immediate-type allergic reactions. CONCLUSIONS Anaphylaxis related to infusion of idursulfase is mediated by anti-idursulfase IgE antibody, which might be produced by de novo synthesis. SPT is useful in predicting the occurrence of anti-idursulfase IgE-mediated anaphylaxis during infusion.
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Affiliation(s)
| | | | | | | | - S. H. Maeng
- Department of Pediatrics; Samsung Medical Center; Sungkyunkwan University School of Medicine; Seoul; Korea
| | - S. Y. Cho
- Department of Pediatrics; Samsung Medical Center; Sungkyunkwan University School of Medicine; Seoul; Korea
| | | | | | - D. K. Jin
- Department of Pediatrics; Samsung Medical Center; Sungkyunkwan University School of Medicine; Seoul; Korea
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Ahn K, Ozturk N, Smith B, Aydogan B. SU-E-T-473: Preplanning of Stereotactic Radiosurgery Using the Brainlab IPlan Treatment Planning System. Med Phys 2013. [DOI: 10.1118/1.4814906] [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: 11/07/2022] Open
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23
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Ozturk N, Smith B, Ahn K, Aydogan B. SU-E-T-10: Streamlining and Automating Dosimetric Analysis for Treatment Planning System and Linac QA. Med Phys 2013. [DOI: 10.1118/1.4814444] [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: 11/07/2022] Open
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24
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Aydogan B, Koshy M, Rondelli D, Surucu M, Ahn K, Kavak G, Brett S, Patel P, Ozturk N, Weichselbaum R. EP-1316: Clinical experience with intensity modulated radiation total marrow irradiation (IMTMI). Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)33622-7] [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: 11/16/2022]
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25
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Ahn K. Prevalence of IgE-mediated Food Allergy in Korean schoolchildren: A Population-based Study. J Allergy Clin Immunol 2012. [DOI: 10.1016/j.jaci.2011.12.146] [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: 10/14/2022]
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Abstract
Cytomegalovirus (CMV) ventriculoencephalitis is a rare but serious potential complication of CMV infection in immunocompromised patients. Characteristic diffusion-weighted imaging findings can be helpful for the diagnosis of CMV ventriculitis, as in this case report.
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Affiliation(s)
- J H Seok
- Department of Radiology, Seoul Saint Mary's Hospital, The Catholic University of Korea, Seoul, South Korea
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Hristov D, Ahn K, Scott G. TU-E-214-02: Overhauser Oxygenation Imaging: Physics, Instrumentation and Pre-Clinical Applications. Med Phys 2011. [DOI: 10.1118/1.3613200] [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: 11/07/2022] Open
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28
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Ahn K, Furutake T, Kusuhara T, Nakatsuka D, Sekine Y, Nonaka M, Iwakura A, Yamanaka K. [Emergency operation and hypothermic therapy for Stanford type A acute aortic dissection in the state of coma]. Kyobu Geka 2010; 63:1032-1034. [PMID: 21066842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report of a 77-year-old woman who was admitted to our hospital in coma by emergency. A computed tomography scan revealed acute aortic dissection (Stanford type A). We established selective antegrade cerebral perfusion within 3 hours of the onset and then performed ascending aortic replacement. In the state of hypothermia (35 degrees C), the patient was weaned from cardiopulmonary bypass. The patient was kept hypothermic until the operation was completed. We kept mild hypothermia (34.5 degrees C) in intensive care unit (ICU) for 40 hours. The patient was extubated at 94 hours after the operation. The patient was discharged from the hospital on foot on postoperative day 21.
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Affiliation(s)
- K Ahn
- Department of Cardiovascular Surgery, Tenri Hospital, Tenri, Japan
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Abstract
Currently available diagnostic markers representing kidney injury or function such as serum creatinine and blood urea nitrogen are insensitive and often increased late in the disease process. Netrin-1 protein, a laminin-related secreted molecule, is minimally or not expressed in tubular epithelial cells of normal kidneys. However, it is highly expressed in injured kidneys. Netrin-1 protein has been shown to be detected in urine from mice with acute kidney injury. The current study was carried out to evaluate whether netrin-1 is also induced in human acute kidney injury (AKI) and can serve as a urinary biomarker of the condition. We analyzed netrin-1 levels by sandwich enzyme-linked immunosorbent assay in urine samples from 10 healthy controls, 22 recipients of a renal allograft, 11 patients with ischemic AKI, 13 with AKI associated with sepsis, 9 with radiocontrast-induced AKI, and 8 with drug-induced AKI. Urinary netrin-1 levels normalized for urinary creatinine were significantly higher in all subject groups. The highest values were observed in patients with sepsis and in transplant patients immediately postoperatively. The level of NGAL was similarly increased in transplant patients. In conclusion, urinary netrin-1 levels are increased in patients with various forms of AKI/ATN and may serve as a universal biomarker for AKI.
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Affiliation(s)
- G Ramesh
- Division of Nephrology, Pennsylvania State University College of Medicine, Hershey, Pennsylvania 17033, USA.
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30
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Ahn K, Scott G, Stang P, Conolly S, Hristov D. TH-D-201C-01: Advancing an Integrated Overhauser-Enhanced MRI (OMRI) - Prepolarized MM (PMRI) System Toward Quantitative Longitudinal Studies of Tumor Hypoxia and Redox Status. Med Phys 2010. [DOI: 10.1118/1.3469549] [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: 11/07/2022] Open
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31
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Lee J, Lee J, Ahn Y, Han Y, Ahn K, Lee S. Ara h2 Is Not A Major Peanut Allergen In Korea. J Allergy Clin Immunol 2010. [DOI: 10.1016/j.jaci.2009.12.880] [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: 11/17/2022]
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Han Y, Lee J, Shin M, Ahn K, Lee S. Difference of the Allergenicity of Egg According to the Age in Korean Children with Egg Allergy. J Allergy Clin Immunol 2010. [DOI: 10.1016/j.jaci.2009.12.887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Park M, Ahn K. P1.068 Comparative study of the botulinum toxin type A potency between Botox® and BTXA®: using human extensor brevis muscle. Parkinsonism Relat Disord 2009. [DOI: 10.1016/s1353-8020(09)70190-7] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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34
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Halpern H, Elas M, Bell R, Hleihel D, Barth E, Chaney C, Ahn K, Pelizzari C, Kocherginsky M, Weichselbaum R. Electron Paramagnetic Resonance Oxygen Images Correlates Spatially and Quantitatively with Increased Vascular Endothelial Growth Factor Concentrations. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.117] [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: 10/20/2022]
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Kim Y, Ahn K, Park H, Song J, Kim T, Hur J, Lee K, Kim S. O479 Years from menopause to surgery is a major determinant of postoperative symptomatic improvement in postmenopausal pelvic organ prolapse. Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)60852-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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36
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Song J, Ahn K, Park H, Hong S, Kim T, Kim Y, Kim S, Lee K. P1100 CA 125 level as a predictive value of second look operation finding and prognostic marker in epithelial ovarian cancer. Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)62584-4] [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: 10/20/2022]
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37
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Kim Y, Ahn K, Shin J, Hong S, Kim T, Hur J, Lee K, Kim S. O477 Relationship between CA-125 and osteoporosis in otherwise healthy postmenopausal women. Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)60850-x] [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: 11/17/2022]
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Ahn K, Bardina L, Grishina G, Beyer K, Sampson HA. Identification of two pistachio allergens, Pis v 1 and Pis v 2, belonging to the 2S albumin and 11S globulin family. Clin Exp Allergy 2009; 39:926-34. [PMID: 19522997 DOI: 10.1111/j.1365-2222.2009.03259.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND IgE-mediated allergic reactions to pistachio appear to be occurring more frequently; however, little is known about its allergenic proteins. OBJECTIVE We attempted to identify pistachio allergens and to clone the encoding genes. METHODS Pistachio proteins were extracted and separated by SDS-PAGE. Immunolabelling was performed with sera from 28 pistachio-allergic individuals. Proteins of interest were further analysed by Edman sequencing and mass spectrometry/mass spectrometry (MS/MS). In parallel, a cDNA library was generated from immature pistachios and screened with primers designed on the basis of internal sequences and peptide spectra. Full-length cDNA clones were isolated from the library and sequenced. Recombinant proteins were expressed and tested with sera from pistachio-allergic patients. RESULTS Nineteen out of 28 patients (68%) showed IgE binding to a 7 kDa protein fraction, while 14 (50%) showed specific IgE to a 32 kDa protein fraction. Analysis by Edman sequencing and MS/MS revealed that these proteins were homologue to the cashew nut allergens Ana o 3 and Ana o 2, respectively. Screening of the pistachio cDNA library resulted in isolation of novel protein cDNAs. Open-reading frame translation provided the complete amino acid sequences of two new allergenic pistachio proteins. Recombinant proteins were recognized by six out of six selected patients. Therefore, these new allergens were named Pis v 1 and Pis v 2 by the Allergen Nomenclature Subcommittee. CONCLUSION Novel allergens in pistachio, Pis v 1 and Pis v 2, which belong to 2S albumin and 11S globulin family, respectively, were isolated and the genes encoding these allergens were identified.
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Affiliation(s)
- K Ahn
- Division of Pediatric Allergy and Immunology and the Jaffe Food Allergy Institute, The Mount Sinai School of Medicine, New York, NY 10029-6574, USA
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Park J, Ahn K, Woo D, Lee J, Kim J, Jung W, Choe B, Suh T. SU-FF-T-518: Implications of Radiation Treatment Planning Based On Apparent Diffusion Coefficient Map for Malignant Brain Tumors. Med Phys 2009. [DOI: 10.1118/1.3182016] [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: 11/07/2022] Open
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40
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Ahn K, Scott G, Stang P, Conolly S, Hristov D. TH-D-304A-01: Development of Multi-Parametric Molecular Imager by Integrating Overhauser-Enhanced MRI (OMRI) with Prepolarized MRI (PMRI). Med Phys 2009. [DOI: 10.1118/1.3182693] [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: 11/07/2022] Open
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41
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Kim J, Kim H, Ahn K, Lee S. A Novel Mutation In The Linker Domain Of The STAT3 Gene, p.Lys531Glu, In Hyper-IgE Syndrome. J Allergy Clin Immunol 2009. [DOI: 10.1016/j.jaci.2008.12.305] [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: 11/15/2022]
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42
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Ahn K, Hargreaves B, Alley M, Horst K, Daniel B, Hristov D. Design of Magnetic Resonance Imaging Protocol for Accelerated Partial Breast Irradiation in Prone Position and Estimation of Treatment Margin. Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.016] [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: 10/21/2022]
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Tiryaki H, Ahn K, Roeske J, Mundt A, Mell L, Aydogan B. SU-GG-T-71: Dosimetric Comparison of Bone Marrow-Sparing Intensity Modulated Radiation Theraphy Versus Conventional Techniques for the Treatment of Cervical Cancer. Med Phys 2008. [DOI: 10.1118/1.2961822] [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: 11/07/2022] Open
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Ahn K, Hargreaves B, Alley M, Horst K, Daniel B, Hristov D. TU-C-351-01: Design of Magnetic Resonance Imaging Protocol for Accelerated Partial Breast Irradiation in Prone Position. Med Phys 2008. [DOI: 10.1118/1.2962455] [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: 11/07/2022] Open
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Ahn K, Dieterich S, Luxton G, Horst K, Hristov D. SU-DD-A1-05: Treatment Planning of Prone Position Accelerated Partial Breast Irradiation Customized for Magnetic Resonance Imaging Guidance. Med Phys 2008. [DOI: 10.1118/1.2961354] [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: 11/07/2022] Open
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Shin S, Ahn K, Kwak Y, Song K, Park J, Youn Y. 320: Association between Socioeconomic Status and the Incidence and Severity of Traumatic Brain Injury. Ann Emerg Med 2007. [DOI: 10.1016/j.annemergmed.2007.06.381] [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: 10/22/2022]
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Kim B, Ahn K, Kim I, Park S, Kim B, Yoon S. Effect of combined treatment of bortezomib and valproic acid on multiple myeloma cells. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.18539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
18539 Background: Valproic acid (VPA) has an activity of histone deacetylase inhibitor that is known to have in vitro cytotoxic effect on multiple myeloma (MM) cells. It was investigated that VPA could synergize with bortezomib for human MM cell lines. Methods: U266 cell lines were treated with bortezomib 50nM and/or VPA 0.6mM and then MTT assay, cell cycle analysis using FACS, immunoblot analysis, caspase-3 activity assay, and IL-6 ELISA assay were performed. Results: Bortezomib activated caspase-3 and induced G1 cell cycle arrest. In MTT assay, VPA suppressed the U266 cell proliferation with IC50 of 0.6mM and combined treatment of bortezomib and VPA had more inhibitory effect than bortezomib alone. This combination caused further G1 cell cycle arrest, caspase-3 activation, and lowered IL-6 secretion from U266 cells than bortezomib, respectively. In immunoblot analysis, this combination further decreased the expression of cyclin A, cyclin D1, cyclin E, CDK2, CDK4, and CDK6, whereas up-regulated p21 and p27 expression than bortezomib alone. Conclusions: The combined treatment of bortezomib and VPA has a more significant anti-myeloma effect than bortezomib alone. No significant financial relationships to disclose.
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Affiliation(s)
- B. Kim
- Seoul Municipal Boramae Hospital, Seoul, Republic of Korea; Seoul National University College of Medicine, Seoul, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea
| | - K. Ahn
- Seoul Municipal Boramae Hospital, Seoul, Republic of Korea; Seoul National University College of Medicine, Seoul, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea
| | - I. Kim
- Seoul Municipal Boramae Hospital, Seoul, Republic of Korea; Seoul National University College of Medicine, Seoul, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea
| | - S. Park
- Seoul Municipal Boramae Hospital, Seoul, Republic of Korea; Seoul National University College of Medicine, Seoul, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea
| | - B. Kim
- Seoul Municipal Boramae Hospital, Seoul, Republic of Korea; Seoul National University College of Medicine, Seoul, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea
| | - S. Yoon
- Seoul Municipal Boramae Hospital, Seoul, Republic of Korea; Seoul National University College of Medicine, Seoul, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea
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Ayuso R, Grishina G, Ahn K, Bardina L, Beyer K, Sampson H. Identification of a MnSOD-like Protein as a New Major Pistachio Allergen. J Allergy Clin Immunol 2007. [DOI: 10.1016/j.jaci.2006.11.433] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Yoo K, Kim J, Lee S, Chang S, Ahn K. UP-01.82. Urology 2006. [DOI: 10.1016/j.urology.2006.08.730] [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: 10/24/2022]
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Choi W, Lee D, Ahn K, Lee J, Kim Y, Lee W. P-781. Fertil Steril 2006. [DOI: 10.1016/j.fertnstert.2006.07.1167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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