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Lee JA, Kim SJ, Seo HS, Lee HH, Kim SG, Jun KH, Song KY, Jung YJ. Radical gastrectomy is safe for treatment of gastric cancer patients on immunosuppressive drugs after organ transplantation. Front Oncol 2024; 13:1264628. [PMID: 38269025 PMCID: PMC10807791 DOI: 10.3389/fonc.2023.1264628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 12/21/2023] [Indexed: 01/26/2024] Open
Abstract
Background De novo malignancies are major causes of death after organ transplantation because the recipients subsequently receive immunosuppressant drugs. When gastric cancer develops, the clinical course of the tumor may be particularly aggressive. However, there are few reliable studies of gastric cancer treatment after organ transplantation. This study examined the clinicopathological characteristics of gastric cancer patients after organ transplantation and evaluated treatment outcomes after gastrectomy. Methods Clinical data were collected from 54 patients who were diagnosed with gastric cancer after organ transplantation. Of these, 30 who underwent surgery for gastric cancer while on immunosuppressant medications were compared with a control group of 625 gastric cancer patients. To compensate for clinical differences between the two groups, 1:1 propensity-score matching was performed. Results Among the 30 gastric cancer patients on immunosuppressants, kidney transplantation was the most common procedure (19/30, 63.3%) followed by bone marrow (6) and liver transplantation (4); among all 54 patients, 45 were on one or two immunosuppressants. Up-migration to an advanced pathological stage was more frequent in the transplant group. In multivariate analysis, transplantation was a significant risk factor for up-migration from the T, M, and final stages after surgery. When the 30 patients on immunosuppressants who underwent gastric cancer surgery were compared with the matched controls, the total incidence (30.0 vs 40.0%, P = 0.417) and the number of severe postoperative complications (16.7 vs 13.4%, P = 0.417) did not differ significantly between groups after propensity score matching. In terms of overall survival, the transplant group showed significantly worse prognosis in stages I, II, and IV (P < 0.001, P = 0.039 and 0.007, respectively). Conclusion Radical gastrectomy can be a safe oncological procedure for gastric cancer patients on immunosuppressants after transplantation. Considering their immunosuppressed condition and the possibility of underestimation of the stage of gastric cancer, early detection with endoscopic screening is needed to allow curative treatment.
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Affiliation(s)
- Jin Ah Lee
- Division of Gastrointestinal Surgery, Department of Surgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - So Jung Kim
- Division of Gastrointestinal Surgery, Department of Surgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Ho Seok Seo
- Division of Gastrointestinal Surgery, Department of Surgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Han Hong Lee
- Division of Gastrointestinal Surgery, Department of Surgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Sung Geun Kim
- Division of Gastrointestinal Surgery, Department of Surgery, Yeouedo St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Kyong Hwa Jun
- Division of Gastrointestinal Surgery, Department of Surgery, St. Vincent’s Hospital, College of Medicine, The Catholic University of Korea, Suwon, Republic of Korea
| | - Kyo Young Song
- Division of Gastrointestinal Surgery, Department of Surgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Yoon Ju Jung
- Division of Gastrointestinal Surgery, Department of Surgery, Yeouedo St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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Lee EH, Lee JA, Ahn JY, Jeong SJ, Ku NS, Choi JY, Yeom JS, Song YG, Park SH, Kim JH. Association of body mass index and bloodstream infections in patients on extracorporeal membrane oxygenation: a single-centre, retrospective, cohort study. J Hosp Infect 2023; 140:117-123. [PMID: 37562593 DOI: 10.1016/j.jhin.2023.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 08/01/2023] [Accepted: 08/06/2023] [Indexed: 08/12/2023]
Abstract
BACKGROUND Obesity is associated with poor clinical outcomes in critically ill patients. However, under some clinical conditions, obesity has protective effects. Bloodstream infections (BSI) are among the most common nosocomial infections associated with extracorporeal membrane oxygenation (ECMO). BSI during ECMO is associated with higher mortality rates and poorer clinical outcomes. AIM To analyse whether body mass index (BMI) is associated with BSI during ECMO or with in-hospital mortality. METHODS All adult patients who had received ECMO support for >48 h were included in the analysis. The analysis of total duration of ECMO support, in-hospital mortality and BSI was stratified by BMI category. The Cox proportional hazards model was used to compare the risk of BSI among BMI categories. FINDINGS In total, 473 patients were enrolled in the study. The average age was 56.5 years and 65.3% were men. The total duration of ECMO was approximately 11.8 days, with a mortality rate of 47.1%. The incidence rates of BSI and candidaemia were 20.5% and 5.5%, respectively. The underweight group required ECMO for respiratory support, whereas the overweight and obese groups required ECMO for cardiogenic support (P<0.0001). No significant difference in BSI rate was found (P=0.784). However, after adjusting for clinical factors, patients in Group 4 (BMI 25.0-<30.0 kg/m2) exhibited lower mortality compared with patients in Group 2 (normal BMI) (P=0.004). CONCLUSION BMI was not associated with risk of BSI, but patients with higher BMI showed lower in-hospital mortality associated with ECMO support.
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Affiliation(s)
- E H Lee
- Department of Internal Medicine and AIDS Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - J A Lee
- Department of Internal Medicine and AIDS Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - J Y Ahn
- Department of Internal Medicine and AIDS Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - S J Jeong
- Department of Internal Medicine and AIDS Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - N S Ku
- Department of Internal Medicine and AIDS Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - J Y Choi
- Department of Internal Medicine and AIDS Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - J-S Yeom
- Department of Internal Medicine and AIDS Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - Y G Song
- Department of Internal Medicine and AIDS Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - S H Park
- Chaum Life Centre, CHA University, Seoul, South Korea.
| | - J H Kim
- Department of Internal Medicine and AIDS Research Institute, Yonsei University College of Medicine, Seoul, South Korea.
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Lee EH, Lee SK, Cheon JH, Koh H, Lee JA, Kim CH, Kim JN, Lee KH, Lee SJ, Kim JH, Ahn JY, Jeong SJ, Ku NS, Yong DE, Yoon SS, Yeom JS, Choi JY. Comparing the efficacy of different methods of faecal microbiota transplantation via oral capsule, oesophagogastroduodenoscopy, colonoscopy, or gastric tube. J Hosp Infect 2023; 131:234-243. [PMID: 36414164 DOI: 10.1016/j.jhin.2022.11.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 11/08/2022] [Accepted: 11/12/2022] [Indexed: 11/21/2022]
Abstract
BACKGROUND The increasing prevalence of multidrug-resistant organism (MDRO) carriage poses major challenges to medicine as healthcare costs increase. Recently, faecal microbiota transplantation (FMT) has been discussed as a novel and effective method for decolonizing MDRO. AIM To compare the efficacy of different FMT methods to optimize the success rate of decolonization in patients with MDRO carriage. METHODS This prospective cohort study enrolled patients with MDRO carriages from 2018 to 2021. Patients underwent FMT via one of the following methods: oral capsule, oesophagogastroduodenoscopy (EGD), colonoscopy, or gastric tube. FINDINGS A total of 57 patients underwent FMT for MDRO decolonization. The colonoscopy group required the shortest time for decolonization, whereas the EGD group required the longest (24.9 vs 190.4 days, P = 0.022). The decolonization rate in the oral capsule group was comparable to that in the EGD group (84.6% vs 85.7%, P = 0.730). An important clinical factor associated with decolonization failure was antibiotic use after FMT (odds ratio = 6.810, P = 0.008). All four groups showed reduced proportions of MDRO species in microbiome analysis after FMT. CONCLUSION Compared to other conventional methods, the oral capsule is an effective FMT method for patients who can tolerate an oral diet. The discontinuation of antibiotics after FMT is a key factor in the success of decolonization.
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Affiliation(s)
- E H Lee
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - S K Lee
- Division of Gastroenterology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - J H Cheon
- Division of Gastroenterology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - H Koh
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Severance Children's Hospital, Severance Pediatric Liver Disease Research Group, Yonsei University College of Medicine, Seoul, South Korea
| | - J A Lee
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - C H Kim
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - J N Kim
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - K H Lee
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - S J Lee
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - J H Kim
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - J Y Ahn
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - S J Jeong
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - N S Ku
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - D E Yong
- Division of Laboratory Medicine and Research Institute of Bacterial Resistance, Yonsei University College of Medicine, Seoul, South Korea
| | - S S Yoon
- Department of Microbiology and Immunology, Yonsei University College of Medicine, Seoul, South Korea
| | - J S Yeom
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - J Y Choi
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea.
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Cohilis M, Hong L, Janssens G, Rossomme S, Sterpin E, Lee JA, Souris K. Development and validation of an automatic commissioning tool for the Monte Carlo dose engine in myQA iON. Phys Med 2022; 95:1-8. [PMID: 35051680 DOI: 10.1016/j.ejmp.2022.01.002] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 01/07/2022] [Accepted: 01/08/2022] [Indexed: 12/14/2022] Open
Abstract
Independent dose verification with Monte Carlo (MC) simulations is an important feature of proton therapy quality assurance (QA). However, clinical integration of such tools often generates an additional and complex workload for medical physicists. The preparation of the necessary clinical inputs, such as the machine beam model, should therefore be automated. In this work, a methodology for automatic MC commissioning has been devised, validated, and developed into a MATLAB tool for the users of myQA iON, the recent QA platform of IBA Dosimetry. With this workflow, all necessary parameters can easily be tuned using dedicated optimization methods. For the geometrical beam parameters (phase space), the assumption of a single or double Gaussian is made. To model the energy spectrum, a Gaussian function is assumed and parameters are optimized using either MC simulations or a library of pre-computed Bragg peaks. For the absolute dose calibration, commissioning fields can be reproduced with the dose engine to retrieve the necessary parameters. We discuss in a first time the tool efficiency and show that one can optimize all parameters in less than 4 min per energy with excellent accuracy. We then validate a beam model obtained with the tool by simulating homogeneous spread-out Bragg peaks (SOBPs) and patient QA plans previously measured in water. An average range agreement of 0.29 ± 0.34 mm is achieved for the SOBPs while 3%/3 mm local gamma passing rates reach 99.3% on average over all 62 measured patient QA planes, which is well within clinical tolerances.
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Affiliation(s)
- M Cohilis
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique (IREC), MIRO Lab, Brussels, Belgium
| | - L Hong
- University of Florida Proton Therapy Institute, Jacksonville, FL, USA
| | - G Janssens
- Ion Beam Applications, Louvain-la-Neuve, Belgium
| | - S Rossomme
- Ion Beam Applications, Louvain-la-Neuve, Belgium
| | - E Sterpin
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique (IREC), MIRO Lab, Brussels, Belgium; KU Leuven, Department of Oncology, Laboratory of Experimental Radiotherapy, Leuven, Belgium
| | - J A Lee
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique (IREC), MIRO Lab, Brussels, Belgium
| | - K Souris
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique (IREC), MIRO Lab, Brussels, Belgium.
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Kwon HJ, Lee H, Lee JA, Kim JY, Tchah H. Astigmatic correction of simultaneous femtosecond laser-assisted cataract surgery (FLACS) with intrastromal arcuate keratotomy (ISAK) versus Toric intraocular Lens Impantation with conventional phacoemulsification. BMC Ophthalmol 2021; 21:298. [PMID: 34391403 PMCID: PMC8364067 DOI: 10.1186/s12886-021-02059-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 08/13/2020] [Accepted: 08/02/2021] [Indexed: 11/10/2022] Open
Abstract
Background To compare the efficacies in astigmatic correction of simultaneous femtosecond laser-assisted cataract surgery (FLACS) with intrastromal arcuate keratotomy (ISAK) versus toric intraocular lens (IOL) implantation with conventional phacoemulsification in moderate astigmatism. Methods A retrospective chart review was conducted for patients who had undergone cataract surgery by one surgeon. We identified patients with preoperative corneal astigmatism from + 0.75 to + 2.00 diopters (D) who had undergone astigmatic correction with FLACS with ISAK or toric IOL implantation with conventional phacoemulsification. We measured the visual acuity, intraocular pressure, automated keratometer, manifest refraction, and topography preoperatively and 1-day, 1-month, 3-month, and 6-month postoperatively. The vector analysis of refractive astigmatism was performed. Results Of a total of 48 eyes of 48 patients, 27 eyes of 27 patients had FLACS with ISAK (AK group), and 21 eyes of 21 patients had conventional cataract surgery with toric IOL implantation (toric IOL group). Refractive astigmatism was significantly decreased in both groups. The mean preoperative and 6-month postoperative refractive astigmatism were 1.85 ± 1.07 and 0.99 ± 0.51 D, respectively, in the AK group (P = 0.028), and 1.84 ± 0.81 and 0.68 ± 0.21 D, respectively, in the toric IOL group (P < 0.001). There was no significant difference in refractive astigmatism between the two groups at 6-month postoperatively (0.99 ± 0.51 vs 0.68 ± 0.21 D, P = 0.057). At 6-month postoperatively, parameters for vector analysis of refractive astigmatism showed no statistical difference between the two groups. Corneal astigmatism was significantly decreased in the AK group. Corneal astigmatism from topography and the automated keratometer were significantly lower in the AK group 6-month postoperatively compared to toric IOL group (0.94 ± 0.40 vs. 1.53 ± 0.46 D, P = 0.018 for topography; and 0.98 ± 0.69 vs. 1.37 ± 0.41 D, P = 0.032 for the automated keratometer). Conclusions FLACS with ISAK could be an effective procedure for reducing astigmatism as well as toric IOL implantation in cataract surgery.
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Affiliation(s)
- Hye Ji Kwon
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-Ro 43-Gil, Songpa-Gu, Seoul, 05505, South Korea
| | - Hun Lee
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-Ro 43-Gil, Songpa-Gu, Seoul, 05505, South Korea
| | - Jin Ah Lee
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-Ro 43-Gil, Songpa-Gu, Seoul, 05505, South Korea
| | - Jae Yong Kim
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-Ro 43-Gil, Songpa-Gu, Seoul, 05505, South Korea
| | - Hungwon Tchah
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-Ro 43-Gil, Songpa-Gu, Seoul, 05505, South Korea.
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Lim SY, Kim JY, Lee JA, Kwon JS, Park JY, Cha HH, Suh MH, Lee HJ, Kim H, Kim S, Bae S, Jung J, Kim EH, Jee Y, Kim SH. Immune responses and reactogenicity after ChAdOx1 in individuals with past SARS-CoV-2 infection and those without. J Infect 2021; 84:94-118. [PMID: 34332017 PMCID: PMC8316626 DOI: 10.1016/j.jinf.2021.07.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 07/24/2021] [Indexed: 01/31/2023]
Affiliation(s)
- So Yun Lim
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Ji Yeun Kim
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jin Ah Lee
- Institut Pasteur Korea, Seongnam-si, Gyeonggi-do, Republic of Korea
| | - Ji-Soo Kwon
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Ji Young Park
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Hye Hee Cha
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Mi Hyun Suh
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Hyun Jung Lee
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Hyeonju Kim
- Institut Pasteur Korea, Seongnam-si, Gyeonggi-do, Republic of Korea
| | - Seungtaek Kim
- Institut Pasteur Korea, Seongnam-si, Gyeonggi-do, Republic of Korea
| | - Seongman Bae
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jiwon Jung
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Eui Ho Kim
- Institut Pasteur Korea, Seongnam-si, Gyeonggi-do, Republic of Korea
| | - Youngmee Jee
- Institut Pasteur Korea, Seongnam-si, Gyeonggi-do, Republic of Korea.
| | - Sung-Han Kim
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.
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Lee JA, Lee WJ, Lim J, Kim SO. N-Dopant-Mediated Growth of Metal Oxide Nanoparticles on Carbon Nanotubes. Nanomaterials (Basel) 2021; 11:nano11081882. [PMID: 34443711 PMCID: PMC8400905 DOI: 10.3390/nano11081882] [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] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/19/2021] [Accepted: 07/19/2021] [Indexed: 11/16/2022]
Abstract
Metal oxide nanoparticles supported on heteroatom-doped graphitic surfaces have been pursued for several decades for a wide spectrum of applications. Despite extensive research on functional metal oxide nanoparticle/doped carbon nanomaterial hybrids, the role of the heteroatom dopant in the hybridization process of doped carbon nanomaterials has been overlooked. Here, the direct growth of MnOx and RuOx nanoparticles in nitrogen (N)-doped sites of carbon nanotubes (NCNTs) is presented. The quaternary nitrogen (NQ) sites of CNTs actively participate in the nucleation and growth of the metal nanoparticles. The evenly distributed NQ nucleation sites mediate the generation of uniformly dispersed <10 nm diameter MnOx and RuOx nanoparticles, directly decorated on NCNT surfaces. The electrochemical performance of the resultant hybridized materials was evaluated using cyclic voltammetry. This novel hybridization method using the dopant-mediated nucleation and growth of metal oxides suggests ways that heteroatom dopants can be utilized to optimize the structure, interface and corresponding properties of graphitic carbon-based hybrid materials.
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Affiliation(s)
- Jin Ah Lee
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Korea; (J.A.L.); (W.J.L.); (S.O.K.)
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Korea
- KAIST Institute for Nanocentury, KAIST, Daejeon 34141, Korea
| | - Won Jun Lee
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Korea; (J.A.L.); (W.J.L.); (S.O.K.)
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Korea
- KAIST Institute for Nanocentury, KAIST, Daejeon 34141, Korea
- Department of Fiber System Engineering, Dankook University, Yongin 16890, Korea
| | - Joonwon Lim
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Korea; (J.A.L.); (W.J.L.); (S.O.K.)
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Korea
- KAIST Institute for Nanocentury, KAIST, Daejeon 34141, Korea
- Department of Information Display, Kyung Hee University, Seoul 02447, Korea
- Correspondence:
| | - Sang Ouk Kim
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Korea; (J.A.L.); (W.J.L.); (S.O.K.)
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Korea
- KAIST Institute for Nanocentury, KAIST, Daejeon 34141, Korea
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Steinl GK, Yeh R, McManus CM, Lee JA, Kuo JH. Variations in the Course of the Carotid Arteries in Patients with Retropharyngeal Parathyroid Adenomas. AJNR Am J Neuroradiol 2021; 42:749-752. [PMID: 33602744 DOI: 10.3174/ajnr.a6995] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Accepted: 11/24/2020] [Indexed: 12/17/2022]
Abstract
The carotid arteries, classically described as taking a relatively straight course through the neck, deviate medially in a minority of patients. At the extreme, the internal carotid arteries may "kiss" in the midline, coming extremely close to the pharyngeal wall. In this clinical report, we describe 5 patients with primary hyperparathyroidism, all with ectopic retropharyngeal parathyroid adenomas but all with varying carotid artery anatomy. We describe these variations using a previously developed clinical grading system that highlights 1) the relationship between carotid artery location and risk of injury during pharyngeal procedures and 2) the importance of universal, objective criteria to classify carotid anatomy. Radiologists should be familiar with variations in carotid anatomy and communicate them to the operative team.
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Affiliation(s)
- G K Steinl
- From the Department of Surgery, Division of GI/Endocrine Surgery (G.K.S., C.M.M., J.A.L., J.H.K.), Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, New York
| | - R Yeh
- Department of Radiology (R.Y.), Memorial Sloan Kettering Cancer Center, New York, New York
| | - C M McManus
- From the Department of Surgery, Division of GI/Endocrine Surgery (G.K.S., C.M.M., J.A.L., J.H.K.), Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, New York
| | - J A Lee
- From the Department of Surgery, Division of GI/Endocrine Surgery (G.K.S., C.M.M., J.A.L., J.H.K.), Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, New York
| | - J H Kuo
- From the Department of Surgery, Division of GI/Endocrine Surgery (G.K.S., C.M.M., J.A.L., J.H.K.), Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, New York
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Sterpin E, Rivas ST, Van den Heuvel F, George B, Lee JA, Souris K. Development of robustness evaluation strategies for enabling statistically consistent reporting. Phys Med Biol 2021; 66:045002. [PMID: 33296875 DOI: 10.1088/1361-6560/abd22f] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Robustness evaluation of proton therapy treatment plans is essential for ensuring safe treatment delivery. However, available evaluation procedures feature a limited exploration of the actual robustness of the plan and generally do not provide confidence levels. This study compared established and more sophisticated robustness evaluation procedures, with quantified confidence levels. We have evaluated several robustness evaluation methods for 5 bilateral head-and-neck patients optimized considering spot scanning delivery and with a conventional CTV-to-PTV margin of 4 mm. Method (1) good practice scenario selection (GPSS) (e.g. +/- 4 mm setup error 3% range uncertainty); (2) statistically sound scenario selection (SSSS) either only on or both on and inside isoprobability hypersurface encompassing 90% of the possible errors; (3) statistically sound dosimetric selection (SSDS). In the last method, the 90% best plans were selected according to either target coverage quantified by D 95 (SSDS_D 95) or to an approximation of the final objective function (OF) used during treatment optimization (SSDS_OF). For all methods, we have considered systematic setup and systematic range errors. A mix of systematic and random setup errors were also simulated for SSDS, but keeping the same conventional margin of 4 mm. All robustness evaluations have been performed using the fast Monte Carlo dose engine MCsquare. Both SSSS strategies yielded on average very similar results. SSSS and GPSS yield comparable values for target coverage (within 0.5 Gy). The most noticeable differences were found for the CTV between GPSS, on the one hand, and SSDS_D 95 and SSDS_OF, on the other hand (average worst-case D 98 were 2.8 and 2.0 Gy larger than for GPSS, respectively). Simulating explicitly random errors in SSDS improved almost all DVH metrics. We have observed that the width of DVH-bands and the confidence levels depend on the method chosen to sample the scenarios. Statistically sound estimation of the robustness of the plan in the dosimetric space may provide an improved insight on the actual robustness of the plan for a given confidence level.
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Affiliation(s)
- E Sterpin
- KU Leuven, Department of Oncology, Laboratory of Experimental Radiotherapy, Leuven, Belgium
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Center of Molecular Imaging, Radiotherapy and Oncology (MIRO), Brussels, Belgium
| | - Sara T Rivas
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Center of Molecular Imaging, Radiotherapy and Oncology (MIRO), Brussels, Belgium
| | - F Van den Heuvel
- CRUK/MRC Oxford Institute for Radiation Oncology, University of Oxford, Oxford, United Kingdom
- Dept of Haematology/Oncology, Oxford University Hospitals NHS Foundation Trust, Oxford, United Kingdom
| | - B George
- CRUK/MRC Oxford Institute for Radiation Oncology, University of Oxford, Oxford, United Kingdom
| | - J A Lee
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Center of Molecular Imaging, Radiotherapy and Oncology (MIRO), Brussels, Belgium
| | - K Souris
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Center of Molecular Imaging, Radiotherapy and Oncology (MIRO), Brussels, Belgium
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Lee JH, Lee H, Lee JA, Yoo A, Kim JY, Tchah H. Clinical outcomes after mix-and-match implantation of diffractive multifocal intraocular lenses with + 2.75 and + 4.00 diopter add powers. BMC Ophthalmol 2020; 20:193. [PMID: 32414339 PMCID: PMC7227366 DOI: 10.1186/s12886-020-01460-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 11/03/2019] [Accepted: 04/30/2020] [Indexed: 11/10/2022] Open
Abstract
Background To evaluate the clinical outcomes of bilateral mix-and-match implantation of diffractive multifocal intraocular lenses (IOLs) with different add powers. Methods We retrospectively reviewed the medical records of 18 patients who underwent bilateral mix-and-match implantation of diffractive multifocal IOLs with different add powers. Multifocal IOLs with add powers of + 2.75 diopters (D) and + 4.00 D were implanted into the patients’ dominant and nondominant eyes, respectively. At 1 and 3-month postoperatively, monocular and binocular visual acuity was measured using logMAR charts and manifest refraction was performed. Specifically, logMAR charts were used to measure uncorrected distance visual acuity (UDVA), uncorrected intermediate visual acuity (UIVA), uncorrected near visual acuity (UNVA), and corrected distance visual acuity (CDVA). Defocus curves, contrast sensitivity, and patient satisfaction were assessed at 3-month postoperatively. Results Binocular logMAR measurements (mean ± standard deviation) at 3-month postoperatively were 0.01 ± 0.04 (UDVA), 0.16 ± 0.05 (UIVA), and 0.11 ± 0.07 (UNVA). Postoperative spherical equivalent was − 0.43 ± 0.35 D and − 0.39 ± 0.21 D in the dominant and nondominant eyes, respectively. Defocus curves showed significant differences between − 1.50 and − 4.00 D among binocular, dominant, and nondominant eye measurements, except between − 2.50 and − 3.00 D. Eyes implanted with + 2.75 and + 4.00 D IOLs showed good contrast sensitivity under photopic and mesopic conditions. Over 80% of patients reported high satisfaction with their near vision. Conclusions Bilateral mix-and-match implantation of diffractive multifocal IOLs with add powers of + 2.75 D and + 4.00 D showed good near, intermediate, and far vision.
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Affiliation(s)
- Jae Hyuck Lee
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-Ro 43-Gil, Songpa-Gu, Seoul, 05505, South Korea
| | - Hun Lee
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-Ro 43-Gil, Songpa-Gu, Seoul, 05505, South Korea
| | - Jin Ah Lee
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-Ro 43-Gil, Songpa-Gu, Seoul, 05505, South Korea
| | - Aeri Yoo
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-Ro 43-Gil, Songpa-Gu, Seoul, 05505, South Korea
| | - Jae Yong Kim
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-Ro 43-Gil, Songpa-Gu, Seoul, 05505, South Korea
| | - Hungwon Tchah
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-Ro 43-Gil, Songpa-Gu, Seoul, 05505, South Korea.
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11
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Liu M, Sum M, Cong E, Colon I, Bucovsky M, Williams J, Kepley A, Kuo J, Lee JA, Lazar RM, Marshall R, Silverberg S, Walker MD. Cognition and cerebrovascular function in primary hyperparathyroidism before and after parathyroidectomy. J Endocrinol Invest 2020; 43:369-379. [PMID: 31621051 PMCID: PMC7275118 DOI: 10.1007/s40618-019-01128-0] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 10/09/2019] [Indexed: 12/11/2022]
Abstract
PURPOSE There are cognitive changes in primary hyperparathyroidism (PHPT) that improve with parathyroidectomy, but the mechanism of cognitive dysfunction has not been delineated. We assessed if cerebrovascular function is impaired in PHPT, improves post-parathyroidectomy and is associated with PTH level and cognitive dysfunction. METHODS This is an observational study of 43 patients with mild hypercalcemic or normocalcemic PHPT or goiter. At baseline, cerebrovascular function (dynamic cerebral autoregulation and vasomotor reactivity) by transcranial Doppler and neuropsychological function were compared between all three groups. A subset underwent parathyroidectomy or thyroidectomy, and was compared 6 months post-operatively. RESULTS Mean cerebrovascular and neuropsychological function was normal and no worse in PHPT compared to controls preoperatively. Higher PTH was associated with worse intracerebral autoregulation (r = - 0.43, p = 0.02) and worse cognitive performance on some tests. Post-parathyroidectomy, mood improved significantly, but changes did not differ compared to those having thyroidectomy (p = 0.84). There was no consistent improvement in cognition or change in vascular function in either surgical group. CONCLUSIONS Although higher PTH was associated with worse intracerebral autoregulation, cerebrovascular function, cognition and mood were normal in mild PHPT. PTX did not improve vascular or cognitive function. The observed improvement in mood cannot be clearly attributed to PTX. Notwithstanding the small sample size, the results do not support changing current criteria for parathyroidectomy to include cognitive complaints. However, the associations between PTH, cognition and cerebral autoregulation merit future studies in those with more severe hyperparathyroidism.
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Affiliation(s)
- M Liu
- Division of Endocrinology, Department of Medicine, Columbia University College of Physicians and Surgeons, New York, NY, 10032, USA
| | - M Sum
- Division of Endocrinology, Department of Medicine, New York University Langone Medical Center, New York, NY, 10016, USA
| | - E Cong
- Division of Endocrinology, Department of Medicine, Columbia University College of Physicians and Surgeons, New York, NY, 10032, USA
| | - I Colon
- Division of Endocrinology, Department of Medicine, Columbia University College of Physicians and Surgeons, New York, NY, 10032, USA
| | - M Bucovsky
- Division of Endocrinology, Department of Medicine, Columbia University College of Physicians and Surgeons, New York, NY, 10032, USA
| | - J Williams
- Division of Endocrinology, Department of Medicine, Columbia University College of Physicians and Surgeons, New York, NY, 10032, USA
| | - A Kepley
- Wake Forest School of Medicine, Winston-Salem, NC, 27101, USA
| | - J Kuo
- Department of Surgery, Columbia University College of Physicians and Surgeons, New York, NY, 10032, USA
| | - J A Lee
- Department of Surgery, Columbia University College of Physicians and Surgeons, New York, NY, 10032, USA
| | - R M Lazar
- Department of Neurology, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - R Marshall
- Department of Neurology, Columbia University College of Physicians and Surgeons, New York, NY, 10032, USA
| | - S Silverberg
- Division of Endocrinology, Department of Medicine, Columbia University College of Physicians and Surgeons, New York, NY, 10032, USA
| | - M D Walker
- Division of Endocrinology, Department of Medicine, Columbia University College of Physicians and Surgeons, New York, NY, 10032, USA.
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13
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Lee JA, Han SB, Chung NG, Kang JH, Kim M, Jeong DC. A Boy with Chronic Active EBV Infection Presented as Mosquito Bite Hypersensitivity Progressed to Fatal Hemophagocytic Lymphohistiocytosis due to NK Cell Neoplasm. Clin Pediatr Hematol Oncol 2019. [DOI: 10.15264/cpho.2019.26.2.95] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Affiliation(s)
- Jin Ah Lee
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Seung Beom Han
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul, Korea
- Vaccine Bio-research Institute, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Nack Gyun Chung
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jin Han Kang
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul, Korea
- Vaccine Bio-research Institute, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Myungshin Kim
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
- Catholic Genetic Laboratory Center, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Dae Chul Jeong
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul, Korea
- Vaccine Bio-research Institute, College of Medicine, The Catholic University of Korea, Seoul, Korea
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14
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Pemberton CJ, Lee JA, Aldous S, Skelton L, Frampton CM, Than M, Troughton RW, Adamson P, Richards AM. P1756The protein APRIL predicts adverse outcomes in DAPT patients better than NT-proBNP and troponin. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Aim
Dual antiplatelet therapy (DAPT) is a mainstay of post-ACS treatment. However, prediction of adverse events in these patients needs improving. We show here that the TNFα-related protein APRIL (which is produced in platelets and atherosclerotic plaque) is a superior predictor of MACE and new MI in DAPT recipients post-ACS.
Methods
We prospectively recruited 518 patients presenting with the primary complaint of acute chest pain to our hospital ED. Patients were adjudicated to have ACS by 2 independent cardiologists in accordance with ESC guidelines with hsTnI as biomarker. Plasma EDTA samples taken at presentation and 2 hours after were interrogated for APRIL measurements using a two site ELISA. Clinical data/variables, standard biochemistry analytes, hsTnT and NT-proBNP were also measured. Statistical assessments were made using SPSS v23 (IBM). Data for all biomarkers were treated as continuous variables and are presented as median (interquartile range, (IQR)). Statistical assessment of the comparative diagnostic abilities of APRIL, hsTnT, NT-proBNP and hsTnI were assessed using receiver operator curve (ROC) area under the curve (AUC) analysis. The comparative power of each biomarker (log values) to predict new MACE, MI, bleeding and mortality in 1) the whole group and in 2) DAPT recipients alone, within 2 yrs of index presentation was undertaken using a logistic regression base model (95% CI) that included all clinical variables and hsTnI and hsTnT, with APRIL and NT-proBNP each included in additional multivariate analyses.
Results
Of the 518 recruited patients (median age 63 (IQR: 54–73, 35% female), 152 were adjudicated to have ACS (29%, 115 MI, 37 UAP). Presentation APRIL levels were higher in those with a cardiac versus non-cardiac cause for presentation (3.0, (2.0–4.7) vs. 2.4, (1.6–3.8) ng/mL, P=0.001) and positively correlated with hsTnT and NT-proBNP (all P<0.001), but it did not add to the hsTnI (ROC = 0.96) or hsTnT (ROC =0.92) assisted diagnosis of ACS. In all 518 patients, in the multivariate regression model, APRIL was a significant independent predictor of mortality (n=54, P=0.032), new MI (n=43, P=0.006), new ADHF (n=24, P=0.016) and MACE (n=71, P=0.005) that was additive to NT-proBNP and troponin. In DAPT recipients alone (n=156), APRIL was the only biomarker to independently predict new MI (n=27, 95% CI: 1.125–3.982, P=0.020) and MACE (n=37, 95% CI: 1.058–3.389, P=0.031). None of the markers, only age, predicted bleeding episodes.
Conclusion
APRIL is an platelet/plaque derived marker that provides independent risk assessment in ACS patients. In DAPT recipients, the ability of APRIL to predict new MI and MACE is superior to that of cardiac troponins and NT-proBNP and could be used to identify high risk individuals.
Acknowledgement/Funding
Health Research Council of New Zealand; Heart Foundation of New Zealand
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Affiliation(s)
- C J Pemberton
- University of Otago, Christchurch School of Medicine & Health Sciences, Christchurch, New Zealand
| | - J A Lee
- University of Otago, Christchurch School of Medicine & Health Sciences, Christchurch, New Zealand
| | - S Aldous
- Christchurch Hospital, Christchurch, New Zealand
| | - L Skelton
- University of Otago, Christchurch School of Medicine & Health Sciences, Christchurch, New Zealand
| | - C M Frampton
- University of Otago, Christchurch School of Medicine & Health Sciences, Christchurch, New Zealand
| | - M Than
- Christchurch Hospital, Christchurch, New Zealand
| | - R W Troughton
- University of Otago, Christchurch School of Medicine & Health Sciences, Christchurch, New Zealand
| | - P Adamson
- University of Otago, Christchurch School of Medicine & Health Sciences, Christchurch, New Zealand
| | - A M Richards
- University of Otago, Christchurch School of Medicine & Health Sciences, Christchurch, New Zealand
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15
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Pemberton CJ, Lee JA, Aldous S, Appleby S, Chew-Harris J, Than M, Troughton RW, Richards AM. P3408The signal peptide of CNP is a novel predictor of MI, MACE and bleeding risk in chest pain patients. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Aim
CNP is an important vascular and cardiac derived member of the natriuretic peptide family. We have previously provided the first reports that the signal peptide of CNP (CNPsp) is present in the human circulation and is elevated in those with chest pain suspicious of ACS. Here, show that CNPsp levels are highly predictive of new MI, MACE and post-index bleeding in patients presenting with potential ACS.
Methods
We prospectively recruited 493 patients presenting with the primary complaint of acute chest pain to our hospital ED. Patients were adjudicated as ACS by 2 independent cardiologists in accordance with ESC guidelines with hsTnI as biomarker. Plasma EDTA samples taken at presentation and 2 hours after were interrogated for CNPsp measurements using our validated, specific assay. Clinical data/variables, standard biochemistry analytes, hsTnT and NT-proBNP (both Roche Cobas e411) were also measured. Statistical assessments were made using SPSS v23. Data for all biomarkers were treated as continuous variables and are presented as median (interquartile range, (IQR)). Statistical assessment of the comparative abilities of CNPsp, hsTnT, NT-proBNP and hsTnI (log values) to predict new MACE, MI, bleeding and mortality within 2 yrs of index presentation was undertaken using a logistic regression base model (95% CI) that included all clinical variables and hsTnI and hsTnT and NT-proBNP, with CNPsp added to into the multivariate analyses.
Results
Of the 493 recruited patients (median age 63 (IQR: 54–73, 35% female), 148 were adjudicated to have ACS (30%, 109 MI, 39 UAP). Presentation CNPsp levels were not higher in those with adjudicated ACS versus non-ACS (51, (45–65) vs. 50, (42–63) pmol/L, P=0.412), did not correlate with hsTnI, hsTnT or NT-proBNP, but were significantly lower in those with a history of MI (49, (42–59) vs. 51, (43–64) pmol/L, P=0.044). In contrast, they were significantly higher in those with ECG ST-depression (56, (47–85) vs. 50 (42–62) pmol/L, P=0.038). In the multivariate regression model of all 493 patients, lower values of CNPsp were a significant multivariate predictor of new MI (n=37, 95% CI: 0.06–0.89, P=0.038), MACE (n=64, 95% CI: 0.08–0.81, P=0.020) and new bleeding (n=40, 95% CI: 0.05–0.63, P=0.005) within 2 years of presentation. This predictive ability was additive and independent from NT-proBNP and troponin.
Conclusion
This is the first report that CNPsp measurement provides meaningful and independent risk assessment of important outcomes in ACS patients. In particular, the fact that lower levels of CNPsp are predictive of negative MI, MACE and bleeding outcomes suggests that CNPsp may have an unappreciated protective role in the cardiovascular system.
Acknowledgement/Funding
Health Research Council of New Zealand; Heart Foundation of New Zealand
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Affiliation(s)
- C J Pemberton
- University of Otago, Christchurch School of Medicine & Health Sciences, Christchurch, New Zealand
| | - J A Lee
- University of Otago, Christchurch School of Medicine & Health Sciences, Christchurch, New Zealand
| | - S Aldous
- Christchurch Hospital, Christchurch, New Zealand
| | - S Appleby
- University of Otago, Christchurch School of Medicine & Health Sciences, Christchurch, New Zealand
| | - J Chew-Harris
- University of Otago, Christchurch School of Medicine & Health Sciences, Christchurch, New Zealand
| | - M Than
- Christchurch Hospital, Christchurch, New Zealand
| | - R W Troughton
- University of Otago, Christchurch School of Medicine & Health Sciences, Christchurch, New Zealand
| | - A M Richards
- University of Otago, Christchurch School of Medicine & Health Sciences, Christchurch, New Zealand
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Kim SS, Lee JA, Yeo MK. Reduction in Toxicity of Nano-Ag-Polyvinyl-pyrrolidone Using Hydra Proteins and Peptides during Zebrafish Embryogenesis. Nanomaterials (Basel) 2019; 9:nano9091210. [PMID: 31462001 PMCID: PMC6780337 DOI: 10.3390/nano9091210] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 08/12/2019] [Accepted: 08/23/2019] [Indexed: 12/21/2022]
Abstract
Hydra magnipapillata cells reduce the toxicity of silver nanomaterials to zebrafish (Danio rerio) embryos. In this study, we investigated whether Hydra protein (HP) and Hydra basal disc peptide (Hym176) materials reduce nano-Ag-polyvinylpyrrolidone (N-Ag-PVP) toxicity during embryogenesis of the nanosensitive organism zebrafish. Protein (HP) was extracted from Hydra, and peptide (Hym176) was extracted from the hydra basal disc, which is attractive to nanomaterials and related to the immune system. The experimental conditions were exposure to N-Ag-PVP, HP, N-Ag-PVP+HP, Hym176, or N-Ag-PVP+Hym176 during embryo development. N-Ag-PVP+HP group showed lower toxicity than N-Ag-PVP group. In addition, in the N-Ag-PVP+HP group formed aggregated nanomaterials (≥200 nm size) through electrostatic bonding. In the gene expression profile, HP group differed in gene expression profile compared the other experimental groups and it was no genetic toxicity. HP showed a tendency to reduce side effects and abnormal gene expression produced by N-Ag-PVP with no evidence of inherent toxicity. Considering the potential nanotoxicity effects of released nanomaterials on the ecosystem, the reduction of nanotoxicity observed with HP natural materials should be regarded with great interest in terms of the overall health of the ecosystem.
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Affiliation(s)
- Soon Seok Kim
- Department of Environmental Science and Engineering, College of Engineering, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do Seoul 17104, Korea
| | - Jin Ah Lee
- Department of Environmental Science and Engineering, College of Engineering, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do Seoul 17104, Korea
| | - Min-Kyeong Yeo
- Department of Environmental Science and Engineering, College of Engineering, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do Seoul 17104, Korea.
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17
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Song WK, Lee JA, Kim JY, Kim MJ, Tchah H. Analysis of Positional Relationships of Various Centers in Cataract Surgery. Korean J Ophthalmol 2019; 33:70-81. [PMID: 30746914 PMCID: PMC6372378 DOI: 10.3341/kjo.2018.0085] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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: 07/25/2018] [Accepted: 10/01/2018] [Indexed: 01/19/2023] Open
Abstract
Purpose To analyze the positional relationships of various centers in patients undergoing femtosecond laser-assisted cataract surgery (FLACS). Methods The locations of the pupil center (PC), limbal center (LC) and lens center were analyzed in each patient using optical coherence tomography during FLACS in 35 eyes of 35 patients. Using the preoperative corneal aberrometry device, angle kappa and the location of the visual axis (VA) were calculated. After acquiring the relative horizontal and vertical coordinates of each center, the distance and location among each center were compared. The relative location and distance of each center were statistically evaluated. Results The distance from the PC to the lens center was 0.147 ± 0.103 mm, that from the LC to the lens center was 0.205 ± 0.104 mm, and that from the VA to the lens center was 0.296 ± 0.198 mm. The distance from the PC to the VA was 0.283 ± 0.161 mm, that from the LC to the VA was 0.362 ± 0.153 mm, and that from the lens center to the VA was 0.296 ± 0.198 mm. Among the various centers, the PC was the closest to the lens center, whereas the LC and VA were the farthest. Based on the location of the lens center, the PC, LC, and VA exhibited differences in the X and Y coordinate positions (vertical p = 0.004, horizontal p < 0.001). Among them, the LC was significantly inferior and temporal compared to the PC (vertical p = 0.026, horizontal p = 0.023). Based on the location of the VA, the respective locations of the PC, LC and lens center in two dimensions did not significantly differ (vertical p = 0.310, horizontal p = 0.926). Conclusions This study demonstrated the positional and locational relationships between the centers regarding FLACS. The locations of the PC, LC, and VA were different from the lens center with the PC being the closest. Surgeons should be aware of these positional relationships, especially in FLACS.
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Affiliation(s)
- Woo Keun Song
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jin Ah Lee
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jae Yong Kim
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Myoung Joon Kim
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Hungwon Tchah
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
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Pemberton CJ, Lee JA, Jardine R, Skelton L, Frampton CM, Troughton RW, Richards AM. P2791The TNF receptor TACI is a novel inflammatory predictor of heart failure. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- C J Pemberton
- University of Otago Christchurch, Christchurch, New Zealand
| | - J A Lee
- University of Otago Christchurch, Christchurch, New Zealand
| | - R Jardine
- University of Otago Christchurch, Christchurch, New Zealand
| | - L Skelton
- University of Otago Christchurch, Christchurch, New Zealand
| | - C M Frampton
- University of Otago Christchurch, Christchurch, New Zealand
| | - R W Troughton
- University of Otago Christchurch, Christchurch, New Zealand
| | - A M Richards
- University of Otago Christchurch, Christchurch, New Zealand
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19
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Lee JH, Le VH, Lee S, Park JH, Lee JA, Tchah H, Kim S, Kim MJ, Kim KH. Two-photon microscopy of fungal keratitis-affected rabbit cornea ex vivo using moxifloxacin as a labeling agent. Exp Eye Res 2018; 174:51-58. [PMID: 29787746 DOI: 10.1016/j.exer.2018.05.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 05/10/2018] [Accepted: 05/17/2018] [Indexed: 02/06/2023]
Abstract
Two-photon microscopy (TPM) is a three dimensional (3D) microscopic technique based on nonlinear two-photon fluorescence, which has been tested as an alternative to reflectance confocal microscopy (RCM) for detecting fungal keratitis via optical imaging. Although TPM provided images with better contrast than RCM for fungal keratitis, its imaging speed was relatively low because of weak intrinsic signal. Moxifloxacin, a Food and Drug Administration (FDA)-approved antibiotic, was recently used as a cell-labeling agent for TPM. In this study, moxifloxacin was used to label fungal cells for TPM imaging of fungal keratitis models. Fungal cell suspensions and ex vivo fungal keratitis-affected rabbit corneas were prepared using two types of fungal pathogens, Aspergillus fumigatus and Candida albicans, and TPM imaging was performed both with and without moxifloxacin treatment. Fungal cells with enhanced fluorescence were clearly visible by TPM of moxifloxacin-treated fungal cell suspensions. TPM of moxifloxacin-treated fungal keratitis rabbit corneas revealed both the infecting fungal cells and corneal cells similar to those observed in TPM without moxifloxacin treatment, albeit with approximately 10-times enhanced fluorescence. Fungal cells were distinguished from corneal cells on the basis of their distinct morphologies. Thus, TPM with moxifloxacin labeling might be useful for the detection of fungal keratitis at the improved imaging speed.
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Affiliation(s)
- Jun Ho Lee
- Department of Mechanical Engineering, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Pohang, Gyeoungbuk, 37673, Republic of Korea
| | - Viet-Hoan Le
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Pohang, Gyeoungbuk, 37673, Republic of Korea
| | - Seunghun Lee
- Department of Mechanical Engineering, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Pohang, Gyeoungbuk, 37673, Republic of Korea
| | - Jin Hyoung Park
- Department of Ophthalmology, Ulsan College of Medicine, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
| | - Jin Ah Lee
- Department of Ophthalmology, Ulsan College of Medicine, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
| | - Hungwon Tchah
- Department of Ophthalmology, Ulsan College of Medicine, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
| | - Sungjee Kim
- Department of Chemistry, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Pohang, Gyeoungbuk, 37673, Republic of Korea
| | - Myoung Joon Kim
- Department of Ophthalmology, Ulsan College of Medicine, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea.
| | - Ki Hean Kim
- Department of Mechanical Engineering, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Pohang, Gyeoungbuk, 37673, Republic of Korea; Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Pohang, Gyeoungbuk, 37673, Republic of Korea.
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Chang SH, Freeman NLB, Lee JA, Stoll CRT, Calhoun AJ, Eagon JC, Colditz GA. Early major complications after bariatric surgery in the USA, 2003-2014: a systematic review and meta-analysis. Obes Rev 2018; 19:529-537. [PMID: 29266740 PMCID: PMC5880318 DOI: 10.1111/obr.12647] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [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: 07/21/2017] [Revised: 10/05/2017] [Accepted: 10/23/2017] [Indexed: 01/06/2023]
Abstract
The effectiveness of bariatric surgery has been well-studied. However, complications after bariatric surgery have been understudied. This review assesses <30-d major complications associated with bariatric procedures, including anastomotic leak, myocardial infarction and pulmonary embolism. This review included 71 studies conducted in the USA between 2003 and 2014 and 107,874 patients undergoing either gastric bypass, adjustable gastric banding or sleeve gastrectomy, with mean age of 44 years and pre-surgery body mass index of 46.5 kg m-2 . Less than 30-d anastomotic leak rate was 1.15%; myocardial infarction rate was 0.37%; pulmonary embolism rate was 1.17%. Among all patients, mortality rate following anastomotic leak, myocardial infarction and pulmonary embolism was 0.12%, 0.37% and 0.18%, respectively. Among surgical procedures, <30-d after surgery, sleeve gastrectomy (1.21% [95% confidence interval, 0.23-2.19%]) had higher anastomotic leak rate than gastric bypass (1.14% [95% confidence interval, 0.84-1.43%]); gastric bypass had higher rates of myocardial infarction and pulmonary embolism than adjustable gastric banding or sleeve gastrectomy. During the review, we found that the quality of complication reporting is lower than the reporting of other outcomes. In summary, <30-d rates of the three major complications after either one of the procedures range from 0% to 1.55%. Mortality following these complications ranges from 0% to 0.64%. Future studies reporting complications after bariatric surgery should improve their reporting quality.
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Affiliation(s)
- S-H Chang
- Division of Public Health Sciences, Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - N L B Freeman
- Division of Public Health Sciences, Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA.,Center for Advanced Methods Development, RTI International, NC, USA
| | - J A Lee
- Agricultural Statistics Laboratory, University of Arkansas, Fayetteville, AR, USA
| | - C R T Stoll
- Division of Public Health Sciences, Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - A J Calhoun
- Saint Louis University School of Medicine, St. Louis, MO, USA
| | - J C Eagon
- Minimally Invasive and Bariatric Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - G A Colditz
- Division of Public Health Sciences, Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA
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Kim YN, Lee JA, Kim JY, Kim MJ, Tchah HW. Clinical Effects of an Improved Pump Reaction Rate and Automatic Occlusion Sensing System in Phacoemulsification. J Korean Ophthalmol Soc 2018. [DOI: 10.3341/jkos.2018.59.11.1017] [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: 11/23/2022]
Affiliation(s)
- You Na Kim
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jin Ah Lee
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jae Yong Kim
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Myoung Joon Kim
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Hung Won Tchah
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Brousmiche S, Souris K, de Xivry JO, Lee JA, Macq B, Seco J. Combined influence of CT random noise and HU-RSP calibration curve nonlinearities on proton range systematic errors. Phys Med Biol 2017; 62:8226-8245. [PMID: 28817383 DOI: 10.1088/1361-6560/aa86e9] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Proton range random and systematic uncertainties are the major factors undermining the advantages of proton therapy, namely, a sharp dose falloff and a better dose conformality for lower doses in normal tissues. The influence of CT artifacts such as beam hardening or scatter can easily be understood and estimated due to their large-scale effects on the CT image, like cupping and streaks. In comparison, the effects of weakly-correlated stochastic noise are more insidious and less attention is drawn on them partly due to the common belief that they only contribute to proton range uncertainties and not to systematic errors thanks to some averaging effects. A new source of systematic errors on the range and relative stopping powers (RSP) has been highlighted and proved not to be negligible compared to the 3.5% uncertainty reference value used for safety margin design. Hence, we demonstrate that the angular points in the HU-to-RSP calibration curve are an intrinsic source of proton range systematic error for typical levels of zero-mean stochastic CT noise. Systematic errors on RSP of up to 1% have been computed for these levels. We also show that the range uncertainty does not generally vary linearly with the noise standard deviation. We define a noise-dependent effective calibration curve that better describes, for a given material, the RSP value that is actually used. The statistics of the RSP and the range continuous slowing down approximation (CSDA) have been analytically derived for the general case of a calibration curve obtained by the stoichiometric calibration procedure. These models have been validated against actual CSDA simulations for homogeneous and heterogeneous synthetical objects as well as on actual patient CTs for prostate and head-and-neck treatment planning situations.
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Affiliation(s)
- S Brousmiche
- Ion Beam Applications, Louvain-la-Neuve, Belgium
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Hwang KH, Ki Y, Lee YM, Lee JA, Choi IK, Park JS, Kim J, Kang J, Kukushkin Y, Oh EJ, Han KJ, Kim S. Multiplex Human Immunodeficiency Virus 1/2 and Hepatitis C Virus Antibodies Simultaneous Detection Using Three-Dimensional Sol-Gel Nanoporous Capturing Technology. B KOREAN CHEM SOC 2016. [DOI: 10.1002/bkcs.10969] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | - Yeona Ki
- PCL Inc.; Seoul 08510 Republic of Korea
| | | | | | | | | | | | - Jasmine Kang
- Business Development; PCL Inc.; Boston MA 02108 USA
| | | | - Eun Jee Oh
- Seoul St. Mary's Hospital; The Catholic University of Korea; Seoul 06591 Republic of Korea
| | - Kyung Ja Han
- Seoul St. Mary's Hospital; The Catholic University of Korea; Seoul 06591 Republic of Korea
| | - Soyoun Kim
- PCL Inc.; Seoul 08510 Republic of Korea
- Nanobiotechnology Laboratory; Dongguk University; Goyang-si 10362 Korea
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Walker MD, Saeed I, Lee JA, Zhang C, Hans D, Lang T, Silverberg SJ. Effect of concomitant vitamin D deficiency or insufficiency on lumbar spine volumetric bone mineral density and trabecular bone score in primary hyperparathyroidism. Osteoporos Int 2016; 27:3063-71. [PMID: 27198233 PMCID: PMC5555733 DOI: 10.1007/s00198-016-3637-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Accepted: 05/12/2016] [Indexed: 01/31/2023]
Abstract
UNLABELLED Lower vitamin D and higher parathyroid hormone (PTH) levels are associated with higher volumetric BMD and bone strength at the lumbar spine as measured by central quantitative computed tomography in primary hyperparathyroidism (PHPT), but there are no differences in bone microarchitecture as measured by trabecular bone score (TBS). INTRODUCTION The purpose of this study was to evaluate the association between 25-hydroxyvitamin D (25OHD) and volumetric bone mineral density (vBMD) and the TBS at the lumbar spine (LS) in PHPT. METHODS This is a cross-sectional analysis of PHPT patients with and without low 25OHD. We measured vBMD with quantitative computed tomography (cQCT) and TBS by dual-energy X-ray absorptiometry (DXA) at the LS in 52 and 88 participants, respectively. RESULTS In the cQCT cohort, those with lower vitamin D (<20 vs. 20-29 vs. ≥30 ng/ml) tended to be younger (p = 0.05), were less likely to use vitamin D supplementation (p < 0.01), and had better renal function (p = 0.03). Those with 25OHD <20 ng/ml had 80 and 126 % higher serum PTH levels respectively vs. those with 25OHD 20-29 ng/ml (p = 0.002) and 25OHD ≥30 ng/ml (p < 0.0001). Covariate-adjusted integral and trabecular vBMD were higher in those with 25OHD 20-29 vs. those with 25OHD ≥30 ng/ml, but those with 25OHD <20 did not differ. Because there were few participants with 25OHD deficiency, we also compared those with vitamin D <30 vs. ≥30 ng/ml. Covariate-adjusted integral and trabecular vBMD were 23 and 30 % higher respectively (both p < 0.05) in those with vitamin D <30 vs. ≥30 ng/ml. TBS was in the partially degraded range but did not differ by vitamin D status. CONCLUSION In mild PHPT, lower 25OHD is associated with higher PTH, but vitamin D deficiency and insufficiency using current clinical thresholds did not adversely affect lumbar spine skeletal health in PHPT. Further work is needed to determine if higher vBMD in those with lower vitamin D is due to an anabolic effect of PTH.
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Affiliation(s)
- M D Walker
- Department of Medicine, Columbia University College of Physicians and Surgeons, New York, NY, USA.
| | - I Saeed
- Department of Radiology and Biomedical Imaging, University of California at San Francisco, San Francisco, CA, USA
| | - J A Lee
- Department of Surgery, Columbia University College of Physicians and Surgeons, New York, NY, USA
| | - C Zhang
- Department of Medicine, Columbia University College of Physicians and Surgeons, New York, NY, USA
| | - D Hans
- Center of Bone Diseases, Bone and Joint Department, Lausanne University Hospital, Lausanne, Switzerland
| | - T Lang
- Department of Radiology and Biomedical Imaging, University of California at San Francisco, San Francisco, CA, USA
| | - S J Silverberg
- Department of Medicine, Columbia University College of Physicians and Surgeons, New York, NY, USA
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Abstract
The concentration of the dose delivered by protons at the end of their path, the Bragg peak, has the potential to improve external radiotherapy treatments. Unfortunately, the main strength of the protons, their finite range, is also their greatest weakness. Any uncertainty on the range may lead to inadequate target coverage or excessive toxicity. The uncertainties have multiple origins and include, among others, ballistic errors, morphological modifications or inaccurate estimations of the physical quantities necessary to predict the proton range. Uncertainties have been part of daily practice in conventional radiotherapy with X-rays for a long time. However, dose distributions delivered with X-rays are much less sensitive to uncertainties than the ones delivered with protons. This relative insensitivity enabled the management of uncertainties through safety margins using a simple formalism. The conditions of validity of this formalism are much more restrictive for proton therapy, leading to the need of developing new tools and adapted strategies to manage accurately these uncertainties. The objective of this paper is to present a vision for the management of uncertainties in proton therapy in the continuity of formalisms established for X-rays. The latter are first summarized before discussing the necessary developments in order to consistently apply them to protons.
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Affiliation(s)
- E Sterpin
- Katholieke Universiteit Leuven, Department of Oncology, Laboratory of Experimental Radiotherapy, O&N I Herestraat 49, 3000 Leuven, Belgique; Université catholique de Louvain, Center of Molecular Imaging, Radiotherapy and Oncology, institut de recherche expérimentale et clinique, avenue Hippocrate 54, 1200 Brussels, Belgique.
| | - A Barragan
- Université catholique de Louvain, Center of Molecular Imaging, Radiotherapy and Oncology, institut de recherche expérimentale et clinique, avenue Hippocrate 54, 1200 Brussels, Belgique
| | - K Souris
- Université catholique de Louvain, Center of Molecular Imaging, Radiotherapy and Oncology, institut de recherche expérimentale et clinique, avenue Hippocrate 54, 1200 Brussels, Belgique
| | - J A Lee
- Université catholique de Louvain, Center of Molecular Imaging, Radiotherapy and Oncology, institut de recherche expérimentale et clinique, avenue Hippocrate 54, 1200 Brussels, Belgique
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Choi JA, Kim JS, Jeong HJ, Lee JA, Park CK. Ocular Dominance Is Associated with the Ganglion Cell-Inner Plexiform Layer Thickness Profile in the Macula. PLoS One 2016; 11:e0150035. [PMID: 26918335 PMCID: PMC4769019 DOI: 10.1371/journal.pone.0150035] [Citation(s) in RCA: 7] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 02/08/2016] [Indexed: 11/18/2022] Open
Abstract
Purpose To investigate the characteristics of macular ganglion cell-inner plexiform layer (GCIPL) thickness profiles associated with ocular dominance. Setting Private practice, Seoul, Republic of Korea. Design Comparative case-control study. Methods Both eyes of 199 participants with no ophthalmic abnormalities were included. Participants were imaged by spectral-domain optical coherence tomography, and underwent dominant eye testing using a hole-in-a-card test (sighting dominance) at the same visit. Macular GCIPL, as well as circumpapillary retinal nerve fiber layer (RNFL) thickness were compared for individual patients, according to ocular dominance. Results Ocular dominance occurred predominantly in the right eye (right vs. left: 72.36 vs. 27.60%; P < 0.001). In the comparison of macular GCIPL thickness, the average (81.27±5.01 μm vs. 80.66±6.31 μm in dominant vs. non-dominant eyes), inferonasal (81.39±5.47μm vs. 80.33±6.82μm, and inferior sectors (77.95±6.05μm vs. 76.97±8.15μm) were significantly different between dominant and non-dominant eyes (P = 0.040, 0.005, and 0.032, respectively). Significant predictors of average GCIPL thickness were spherical equivalent (β = 1.37, P<0.001), astigmatic power (β = 1.44, P = 0.009), disc area (β = 3.90, P < 0.001), average RNFL thickness (β = 0.22, P<0.001), average cup-to-disc ratio (β = 5.74, P = 0.002), difference between the inferior and superior quadrant RNFL thicknesses (β = 0.08, P = 0.024), and ocular dominance (β = 2.10, P = 0.020). On multivariate regression analysis, ocular dominance was correlated with average GCIPL thickness after adjusting for potential confounders (β = 1.63, P = 0.048). Conclusions Dominant eyes accompanied significantly thicker average macular GCIPL. This information suggests that macular GCIPL thickness may provide an indicator of the relative dominance of an eye.
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Affiliation(s)
- Jin A. Choi
- Department of Ophthalmology, St. Vincent’s Hospital, College of Medicine, The Catholic University of Korea, Suwon, Republic of Korea
| | | | - Hyun Jin Jeong
- Department of Ophthalmology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jin Ah Lee
- Department of Ophthalmology, St. Vincent’s Hospital, College of Medicine, The Catholic University of Korea, Suwon, Republic of Korea
| | - Chan Kee Park
- Department of Ophthalmology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
- * E-mail:
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Yoon WS, Lee NK, Lee JA, Yang DS, Kim CY, Son GS, Chang YW. Abstract P3-12-17: Can radiation dosimetric parameters explain severe skin reaction during adjuvant whole breast irradiation applying field-in-field technique? Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p3-12-17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Aim: Although modern radiotherapy such as field-in-field technique decreased the radiation toxicity, skin reaction is still frequent and main problem during adjuvant whole breast irradiation. Our study investigated various radiation dosimetric and clinical parameters as the risk factors of severe skin reaction.
Methods: From January 2012 to December 2014, total 219 patients with breast conserving surgery and adjuvant whole breast irradiation were retrospectively reviewed. All patients took both whole breast irradiation (50 Gy/25 fractions) and boost to the tumor bed (10 - 15 Gy). Skin reaction was measured by comparing the photography of radiation field between the first day of whole breast irradiation and boost therapy. For each axilla and inferior fold, the intensity (score 1 to 5) and extent (score 0 to 1) of erythema were recorded and summed. The severe skin reaction was defined as score 5 or 6. The relations of various radiation dosimetric parameters for radiotherapy planning, personal breast characteristics and clinical factors to severe skin reaction were evaluated using the Logistic regression tests.
Results: Total 75 (34%) and 57 (26%) patients showed the severe skin reaction to axilla and inferior fold, respectively. The variables of P < 0.2 in univariate analyses including age, the body mass index, the breast height, the V100, the calculated point dose in radiation planning system, the breast separation, the field size, and the gradient of inferior fold entered the multivariate analyses. Age (P=0.013 (OR = 0.950, 95% CI 0.913 - 0.989)), the body mass index (P = 0.015 (OR = 1.123, 95% CI 1.023 - 1.233)), the calculated axilla point dose (P = 0.091 (OR = 1.064, 95% CI 0.990 - 1.142)), and the gradient of inferior fold (P = 0.073 (OR = 1.029, 95% CI 0.997 - 1.063)) were risk factors for severe axilla skin reaction, whereas age (P = 0.018 (OR = 0.948, 95% CI 0.907 - 0.991)) and the V100 (P < 0.001 (OR = 1.005, 95% CI 1.003 - 1.007)) were for severe inferior fold skin reaction.
Conclusion: In addition to clinical factor and personal breast characteristics, the radiation dosimetric parameters such as calculated point dose and V100 could be another predictive factors of severe skin reaction.
Citation Format: Yoon WS, Lee NK, Lee JA, Yang DS, Kim CY, Son GS, Chang YW. Can radiation dosimetric parameters explain severe skin reaction during adjuvant whole breast irradiation applying field-in-field technique?. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P3-12-17.
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Affiliation(s)
- WS Yoon
- Ansan Hospital, Korea University, Ansan, Gyeonggi-do, Korea
| | - NK Lee
- Ansan Hospital, Korea University, Ansan, Gyeonggi-do, Korea
| | - JA Lee
- Ansan Hospital, Korea University, Ansan, Gyeonggi-do, Korea
| | - DS Yang
- Ansan Hospital, Korea University, Ansan, Gyeonggi-do, Korea
| | - CY Kim
- Ansan Hospital, Korea University, Ansan, Gyeonggi-do, Korea
| | - GS Son
- Ansan Hospital, Korea University, Ansan, Gyeonggi-do, Korea
| | - YW Chang
- Ansan Hospital, Korea University, Ansan, Gyeonggi-do, Korea
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Seo D, Kim NY, Lee JA, Han KR, Hur GH, Yang JM, Shin S. Protection against lethal vaccinia virus infection in mice using an siRNA targeting the A5R gene. Antivir Ther 2016; 21:397-404. [DOI: 10.3851/imp3022] [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] [Accepted: 01/04/2016] [Indexed: 10/22/2022]
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Affiliation(s)
- Jin Ah Lee
- Department of Ophthalmology, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Yang Kyeung Cho
- Department of Ophthalmology, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Barragán AM, Differding S, Janssens G, Lee JA, Sterpin E. Feasibility and robustness of dose painting by numbers in proton therapy with contour-driven plan optimization. Med Phys 2015; 42:2006-17. [PMID: 25832091 DOI: 10.1118/1.4915082] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE To prove the ability of protons to reproduce a dose gradient that matches a dose painting by numbers (DPBN) prescription in the presence of setup and range errors, by using contours and structure-based optimization in a commercial treatment planning system. METHODS For two patients with head and neck cancer, voxel-by-voxel prescription to the target volume (GTVPET) was calculated from (18)FDG-PET images and approximated with several discrete prescription subcontours. Treatments were planned with proton pencil beam scanning. In order to determine the optimal plan parameters to approach the DPBN prescription, the effects of the scanning pattern, number of fields, number of subcontours, and use of range shifter were separately tested on each patient. Different constant scanning grids (i.e., spot spacing = Δx = Δy = 3.5, 4, and 5 mm) and uniform energy layer separation [4 and 5 mm WED (water equivalent distance)] were analyzed versus a dynamic and automatic selection of the spots grid. The number of subcontours was increased from 3 to 11 while the number of beams was set to 3, 5, or 7. Conventional PTV-based and robust clinical target volumes (CTV)-based optimization strategies were considered and their robustness against range and setup errors assessed. Because of the nonuniform prescription, ensuring robustness for coverage of GTVPET inevitably leads to overdosing, which was compared for both optimization schemes. RESULTS The optimal number of subcontours ranged from 5 to 7 for both patients. All considered scanning grids achieved accurate dose painting (1% average difference between the prescribed and planned doses). PTV-based plans led to nonrobust target coverage while robust-optimized plans improved it considerably (differences between worst-case CTV dose and the clinical constraint was up to 3 Gy for PTV-based plans and did not exceed 1 Gy for robust CTV-based plans). Also, only 15% of the points in the GTVPET (worst case) were above 5% of DPBN prescription for robust-optimized plans, while they were more than 50% for PTV plans. Low dose to organs at risk (OARs) could be achieved for both PTV and robust-optimized plans. CONCLUSIONS DPBN in proton therapy is feasible with the use of a sufficient number subcontours, automatically generated scanning patterns, and no more than three beams are needed. Robust optimization ensured the required target coverage and minimal overdosing, while PTV-approach led to nonrobust plans with excessive overdose. Low dose to OARs can be achieved even in the presence of a high-dose escalation as in DPBN.
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Affiliation(s)
- A M Barragán
- Center of Molecular Imaging, Radiotherapy and Oncology, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain, Brussels B-1200, Belgium
| | - S Differding
- Center of Molecular Imaging, Radiotherapy and Oncology, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain, Brussels B-1200, Belgium
| | - G Janssens
- Ion Beam Applications S.A., Louvain-la-Neuve 1348, Belgium
| | - J A Lee
- Center of Molecular Imaging, Radiotherapy and Oncology, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain, Brussels B-1200, Belgium
| | - E Sterpin
- Center of Molecular Imaging, Radiotherapy and Oncology, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain, Brussels B-1200, Belgium
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Walker MD, Cong E, Lee JA, Kepley A, Zhang C, McMahon DJ, Bilezikian JP, Silverberg SJ. Low vitamin D levels have become less common in primary hyperparathyroidism. Osteoporos Int 2015; 26:2837-43. [PMID: 26084258 PMCID: PMC4793903 DOI: 10.1007/s00198-015-3199-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 06/03/2015] [Indexed: 10/23/2022]
Abstract
UNLABELLED We compared temporal trends in serum 25-hydroxyvitamin D and parathyroid hormone (PTH) in two primary hyperparathyroidism (PHPT) cohorts recruited 20 years apart. The prevalence of 25-hydroxyvitamin D levels <20 and <30 ng/mL declined by 30-50 %, respectively, and was accompanied by lower PTH. In the older cohort, higher PTH may be due to lower 25-hydroxyvitamin D. INTRODUCTION Vitamin D deficiency may exacerbate PHPT. Whether there have been temporal trends in 25-hydroxyvitamin D (25OHD) levels in PHPT is unclear. The prevalence of low vitamin D levels (25OHD <20 and <30 ng/mL) and associated biochemical and bone mineral density (BMD) profiles were assessed in two PHPT cohorts recruited over 20 years apart. METHODS This is a cross-sectional comparison of serum 25OHD levels, calciotropic hormones, and BMD between two PHPT cohorts recruited at the same hospital: the "old" (N = 103) and "new" (N = 100) cohorts were enrolled between 1984 and 1991 and between 2010 and 2014, respectively. RESULTS Mean 25OHD levels were 26 % higher in the new cohort (23 ± 10 vs. 29 ± 10 ng/mL, p < 0.0001). Levels of 25OHD <20 and <30 ng/mL declined from 46 and 82 %, respectively, to 19 and 54 % (both p < 0.0001). Supplemental vitamin D use was common in the new (64 %) but not the old cohort (0 %). The new cohort demonstrated 33 % lower serum PTH levels (p < 0.0001). Neither serum nor urine calcium differed. BMD was higher in the new cohort at all skeletal sites (all p < 0.001). CONCLUSION With the rise in vitamin D supplementation over the last two decades, low 25OHD levels are no longer common in PHPT patients in the New York area. Those with 25OHD <20 and <30 ng/mL have declined by over 50 and 30 %, respectively. The lower mean PTH levels in the new cohort are most likely accounted for by higher vitamin D intake. Whether improved vitamin D status also underlies the relatively higher BMD in the more vitamin D replete cohort of PHPT patients is unknown.
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Affiliation(s)
- M D Walker
- Department of Medicine, College of Physicians and Surgeons, Columbia University, 630 West 168th Street, PH 8 West - 864, New York, NY, 10032, USA.
| | - E Cong
- Department of Medicine, College of Physicians and Surgeons, Columbia University, 630 West 168th Street, PH 8 West - 864, New York, NY, 10032, USA
| | - J A Lee
- Department of Surgery, College of Physicians and Surgeons, Columbia University, New York, NY, 10032, USA
| | - A Kepley
- Department of Medicine, College of Physicians and Surgeons, Columbia University, 630 West 168th Street, PH 8 West - 864, New York, NY, 10032, USA
| | - C Zhang
- Department of Medicine, College of Physicians and Surgeons, Columbia University, 630 West 168th Street, PH 8 West - 864, New York, NY, 10032, USA
| | - D J McMahon
- Department of Medicine, College of Physicians and Surgeons, Columbia University, 630 West 168th Street, PH 8 West - 864, New York, NY, 10032, USA
| | - J P Bilezikian
- Department of Medicine, College of Physicians and Surgeons, Columbia University, 630 West 168th Street, PH 8 West - 864, New York, NY, 10032, USA
| | - S J Silverberg
- Department of Medicine, College of Physicians and Surgeons, Columbia University, 630 West 168th Street, PH 8 West - 864, New York, NY, 10032, USA
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Cheung YT, Ng T, Shwe M, Ho HK, Foo KM, Cham MT, Lee JA, Fan G, Tan YP, Yong WS, Madhukumar P, Loo SK, Ang SF, Wong M, Chay WY, Ooi WS, Dent RA, Yap YS, Ng R, Chan A. Association of proinflammatory cytokines and chemotherapy-associated cognitive impairment in breast cancer patients: a multi-centered, prospective, cohort study. Ann Oncol 2015; 26:1446-51. [PMID: 25922060 PMCID: PMC4478978 DOI: 10.1093/annonc/mdv206] [Citation(s) in RCA: 155] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Accepted: 04/20/2015] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Existing evidence suggests that proinflammatory cytokines play an intermediary role in postchemotherapy cognitive impairment. This is one of the largest multicentered, cohort studies conducted in Singapore to evaluate the prevalence and proinflammatory biomarkers associated with cognitive impairment in breast cancer patients. PATIENTS AND METHODS Chemotherapy-receiving breast cancer patients (stages I-III) were recruited. Proinflammatory plasma cytokines concentrations [interleukin (IL)-1β, IL-2, IL-4, IL-6, IL-8, IL-10, granulocyte-macrophage colony-stimulating factor, interferon-γ and tumor necrosis factor-α] were evaluated at 3 time points (before chemotherapy, 6 and 12 weeks after chemotherapy initiation). The FACT-Cog (version 3) was utilized to evaluate patients' self-perceived cognitive disturbances and a computerized neuropsychological assessment (Headminder) was administered to evaluate patients' memory, attention, response speed and processing speed. Changes of cognition throughout chemotherapy treatment were compared against the baseline. Linear mixed-effects models were applied to test the relationships of clinical variables and cytokine concentrations on self-perceived cognitive disturbances and each objective cognitive domain. RESULTS Ninety-nine patients were included (age 50.5 ± 8.4 years; 81.8% Chinese; mean duration of education = 10.8 ± 3.3 years). Higher plasma IL-1β was associated with poorer response speed performance (estimate: -0.78; 95% confidence interval (CI) -1.34 to -0.03; P = 0.023), and a higher concentration of IL-4 was associated with better response speed performance (P = 0.022). Higher concentrations of IL-1β and IL-6 were associated with more severe self-perceived cognitive disturbances (P = 0.018 and 0.001, respectively). Patients with higher concentrations of IL-4 also reported less severe cognitive disturbances (P = 0.022). CONCLUSIONS While elevated concentrations of IL-6 and IL-1β were observed in patients with poorer response speed performance and perceived cognitive disturbances, IL-4 may be protective against chemotherapy-associated cognitive impairment. This study is important because cytokines would potentially be mechanistic mediators of chemotherapy-associated cognitive changes.
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Affiliation(s)
- Y T Cheung
- Department of Pharmacy, National University of Singapore, Singapore Department of Pharmacy, National Cancer Centre Singapore, Singapore
| | - T Ng
- Department of Pharmacy, National University of Singapore, Singapore Department of Pharmacy, National Cancer Centre Singapore, Singapore
| | - M Shwe
- Department of Pharmacy, National University of Singapore, Singapore
| | - H K Ho
- Department of Pharmacy, National University of Singapore, Singapore
| | | | - M T Cham
- Breast Centre, KK Women's and Children's Hospital, Singapore
| | - J A Lee
- Breast Centre, KK Women's and Children's Hospital, Singapore
| | - G Fan
- Departments of Psychosocial Oncology, National Cancer Centre Singapore, Singapore
| | - Y P Tan
- Departments of Psychosocial Oncology, National Cancer Centre Singapore, Singapore
| | - W S Yong
- Surgical Oncology, National Cancer Centre Singapore, Singapore
| | - P Madhukumar
- Surgical Oncology, National Cancer Centre Singapore, Singapore
| | - S K Loo
- Medical Oncology, National Cancer Centre Singapore, Singapore
| | - S F Ang
- Medical Oncology, National Cancer Centre Singapore, Singapore
| | - M Wong
- Medical Oncology, National Cancer Centre Singapore, Singapore
| | - W Y Chay
- Medical Oncology, National Cancer Centre Singapore, Singapore
| | - W S Ooi
- Medical Oncology, National Cancer Centre Singapore, Singapore
| | - R A Dent
- Medical Oncology, National Cancer Centre Singapore, Singapore Clinical Sciences, DUKE-NUS Graduate Medical School, Singapore, Singapore
| | - Y S Yap
- Medical Oncology, National Cancer Centre Singapore, Singapore
| | - R Ng
- Medical Oncology, National Cancer Centre Singapore, Singapore Clinical Sciences, DUKE-NUS Graduate Medical School, Singapore, Singapore
| | - A Chan
- Department of Pharmacy, National University of Singapore, Singapore Department of Pharmacy, National Cancer Centre Singapore, Singapore Clinical Sciences, DUKE-NUS Graduate Medical School, Singapore, Singapore
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Yoo K, Kim JY, Lee JA, Kim JS, Lee DK, Kim K, Kim JY, Kim B, Kim H, Kim WM, Kim JH, Ko MJ. Completely transparent conducting oxide-free and flexible dye-sensitized solar cells fabricated on plastic substrates. ACS Nano 2015; 9:3760-3771. [PMID: 25769343 DOI: 10.1021/acsnano.5b01346] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
To achieve commercialization and widespread application of next-generation photovoltaics, it is important to develop flexible and cost-effective devices. Given this, the elimination of expensive transparent conducting oxides (TCO) and replacement of conventional glass substrates with flexible plastic substrates presents a viable strategy to realize extremely low-cost photovoltaics with a potentially wide applicability. To this end, we report a completely TCO-free and flexible dye-sensitized solar cell (DSSC) fabricated on a plastic substrate using a unique transfer method and back-contact architecture. By adopting unique transfer techniques, the working and counter electrodes were fabricated by transferring high-temperature-annealed TiO2 and Pt/carbon films, respectively, onto flexible plastic substrates without any exfoliation. The fabricated working electrode with the conventional counter electrode exhibited a record efficiency for flexible DSSCs of 8.10%, despite its TCO-free structure. In addition, the completely TCO-free and flexible DSSC exhibited a remarkable efficiency of 7.27%. Furthermore, by using an organic hole-transporting material (spiro-MeOTAD) with the same transfer method, solid-state flexible TCO-free DSSCs were also successfully fabricated, yielding a promising efficiency of 3.36%.
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Affiliation(s)
- Kicheon Yoo
- ‡Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, 120-746, Republic of Korea
| | | | | | | | | | | | | | | | | | | | - Jong Hak Kim
- ‡Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, 120-746, Republic of Korea
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Lee JA, Cho YK, La TY, Choi JA. Corneal Endothelial Cell Loss after Tube Shunt Surgery in Fuch's Heterochromic Iridocyclitis. J Korean Ophthalmol Soc 2015. [DOI: 10.3341/jkos.2015.56.4.643] [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: 11/23/2022]
Affiliation(s)
- Jin Ah Lee
- Department of Ophthalmology and Visual Science, St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Korea
| | - Yang Kyung Cho
- Department of Ophthalmology and Visual Science, St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Korea
| | - Tae Yoon La
- Department of Ophthalmology and Visual Science, St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Korea
| | - Jin A Choi
- Department of Ophthalmology and Visual Science, St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Korea
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Seok J, Ryu KY, Lee JA, Jeong I, Lee NS, Baik JM, Kim JG, Ko MJ, Kim K, Kim MH. Ruthenium based nanostructures driven by morphological controls as efficient counter electrodes for dye-sensitized solar cells. Phys Chem Chem Phys 2015; 17:3004-8. [DOI: 10.1039/c4cp04506h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We introduce a facile approach to use ruthenium dioxide (RuO2) and ruthenium (Ru) nanostructures as effective counter electrodes instead of using platinum (Pt) for dye-sensitized solar cells (DSSCs).
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Epelboym I, DiNorcia J, Winner M, Lee MK, Lee JA, Schrope BA, Chabot JA, Allendorf JD. Neoadjuvant therapy and vascular resection during pancreaticoduodenectomy: shifting the survival curve for patients with locally advanced pancreatic cancer. World J Surg 2014; 38:1184-95. [PMID: 24305935 DOI: 10.1007/s00268-013-2384-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
BACKGROUND Neoadjuvant therapy and vascular resection may offer patients with locally advanced pancreatic cancer potential cure. METHODS We reviewed medical records of patients with ductal adenocarcinoma who underwent pancreaticoduodenectomy (PD) from 1992 through 2011. We identified patients who received neoadjuvant therapy (NA+) or required vascular resection (VR+) for locally advanced disease and compared outcomes to those who did not. RESULTS Of the 643 patients who were initially explored, 506 (143 NA+ and 363 NA- patients) ultimately underwent PD. There were no significant differences in R0 resection or morbidity. Mortality was higher in the NA+ versus NA- group (7.0 vs 3.0 %, p = 0.04). More NA+ patients underwent PD VR+ (p < 0.001). Among VR+ patients, neoadjuvant therapy resulted in significantly lower R1 resection. Among resected patients, survival of NA+ patients was significantly longer than both NA- patients (27.3 vs 19.7 months, p < 0.05) and patients abandoned because of locally advanced disease. Age, tumor grade, lymph node ratio, and R1 resection were independent predictors of poor survival. CONCLUSIONS Neoadjuvant therapy and vascular resection offer patients with locally advanced pancreatic cancer the chance for cure with acceptable morbidity and mortality. These patients have improved survival over patients deemed locally inoperable by traditional criteria.
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Affiliation(s)
- Irene Epelboym
- Department of Surgery, Columbia University, College of Physicians and Surgeons, New York, NY, 10032, USA,
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Kang TY, Yoo K, Lee JA, Lee W, Kim K, Lee DK, Kim H, Ko MJ. A facile and rapid process to fabricate platinum counter electrode in dye-sensitized solar cell using nanosecond pulsed laser sintering at room temperature. J Nanosci Nanotechnol 2014; 14:5309-5312. [PMID: 24758023 DOI: 10.1166/jnn.2014.8447] [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: 06/03/2023]
Abstract
To fabricate the platinum (Pt) counter electrode in dye-sensitized solar cells (DSSCs), rapid and low sintering process was carried out using nanosecond pulsed laser sintering (LS) method based on third harmonic (355 nm) of an Nd:YAG laser at room temperature. The surface morphology of LS-Pt on fluorine-doped tin oxide (FTO) electrode showed thin and compact structure, consisting of particles size of - 10-30 nm and thickness of below 30 nm. The DSSCs with the LS-Pt/FTO counter electrodes displayed the power conversion efficiency of 4.4% with short-circuit current = 9.07 mA/cm2, open-circuit voltage = 0.79 V and fill factor = 61.3.
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Yang DS, Yoon WS, Lee JA, Lee NK, Lee S, Kim CY, Yim HJ, Lee SH, Chung HH, Cha SH. The effectiveness of gadolinium MRI to improve target delineation for radiotherapy in hepatocellular carcinoma: a comparative study of rigid image registration techniques. Phys Med 2014; 30:676-81. [PMID: 24870246 DOI: 10.1016/j.ejmp.2014.05.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 04/14/2014] [Accepted: 05/06/2014] [Indexed: 11/29/2022] Open
Abstract
To achieve consistent target delineation in radiotherapy for hepatocellular carcinoma (HCC), image registration between simulation CT and diagnostic MRI was explored. Twenty patients with advanced HCC were included. The median interval between MRI and CT was 11 days. CT was obtained with shallow free breathing and MRI at exhale phase. On each CT and MRI, the liver and the gross target volume (GTV) were drawn. A rigid image registration was taken according to point information of vascular bifurcation (Method[A]) and pixel information of volume of interest only including the periphery of the liver (Method[B]) and manually drawn liver (Method[C]). In nine cases with an indefinite GTV on CT, a virtual sphere was generated at the epicenter of the GTV. The GTV from CT (VGTV[CT]) and MRI (VGTV[MR]) and the expanded GTV from MRI (V+GTV[MR]) considering geometrical registration error were defined. The underestimation (uncovered V[CT] by V[MR]) and the overestimation (excessive V[MR] by V[CT]) were calculated. Through a paired T-test, the difference between image registration techniques was analyzed. For method[A], the underestimation rates of VGTV[MR] and V+GTV[MR] were 16.4 ± 8.9% and 3.2 ± 3.7%, and the overestimation rates were 16.6 ± 8.7% and 28.4 ± 10.3%, respectively. For VGTV[MR] and V+GTV[MR], the underestimation rates and overestimation rates of method[A] were better than method[C]. The underestimation rates and overestimation rates of the VGTV[MR] were better in method[B] than method[C]. By image registration and additional margin, about 97% of HCC could be covered. Method[A] or method[B] could be recommended according to physician preference.
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Affiliation(s)
- D S Yang
- Department of Radiation Oncology, Guro Hospital, College of Medicine, Korea University, Seoul, Republic of Korea
| | - W S Yoon
- Department of Radiation Oncology, Ansan Hospital, College of Medicine, Korea University, Ansan, Republic of Korea.
| | - J A Lee
- Department of Radiation Oncology, Guro Hospital, College of Medicine, Korea University, Seoul, Republic of Korea
| | - N K Lee
- Department of Radiation Oncology, Anam Hospital, College of Medicine, Korea University, Seoul, Republic of Korea
| | - S Lee
- Department of Radiation Oncology, Anam Hospital, College of Medicine, Korea University, Seoul, Republic of Korea
| | - C Y Kim
- Department of Radiation Oncology, Anam Hospital, College of Medicine, Korea University, Seoul, Republic of Korea
| | - H J Yim
- Department of Internal Medicine, Ansan Hospital, College of Medicine, Korea University, Ansan, Republic of Korea
| | - S H Lee
- Department of Radiology, Ansan Hospital, College of Medicine, Korea University, Ansan, Republic of Korea
| | - H H Chung
- Department of Radiology, Ansan Hospital, College of Medicine, Korea University, Ansan, Republic of Korea
| | - S H Cha
- Department of Radiology, Ansan Hospital, College of Medicine, Korea University, Ansan, Republic of Korea
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Zink AM, Wohlleber E, Engels H, Rødningen OK, Ravn K, Heilmann S, Rehnitz J, Katzorke N, Kraus C, Blichfeldt S, Hoffmann P, Reutter H, Brockschmidt FF, Kreiß-Nachtsheim M, Vogt PH, Prescott TE, Tümer Z, Lee JA. Microdeletions including FMR1 in three female patients with intellectual disability - further delineation of the phenotype and expression studies. Mol Syndromol 2014; 5:65-75. [PMID: 24715853 DOI: 10.1159/000357962] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/04/2013] [Indexed: 11/19/2022] Open
Abstract
Fragile X syndrome (FXS) is one of the most common causes of intellectual disability/developmental delay (ID/DD), especially in males. It is caused most often by CGG trinucleotide repeat expansions, and less frequently by point mutations and partial or full deletions of the FMR1 gene. The wide clinical spectrum of affected females partly depends on their X-inactivation status. Only few female ID/DD patients with microdeletions including FMR1 have been reported. We describe 3 female patients with 3.5-, 4.2- and 9.2-Mb de novo microdeletions in Xq27.3-q28 containing FMR1. X-inactivation was random in all patients, yet they presented with ID/DD as well as speech delay, macrocephaly and other features attributable to FXS. No signs of autism were present. Here, we further delineate the clinical spectrum of female patients with microdeletions. FMR1 expression studies gave no evidence for an absolute threshold below which signs of FXS present. Since FMR1 expression is known to be highly variable between unrelated females, and since FMR1 mRNA levels have been suggested to be more similar among family members, we further explored the possibility of an intrafamilial effect. Interestingly, FMR1 mRNA levels in all 3 patients were significantly lower than in their respective mothers, which was shown to be specific for patients with microdeletions containing FMR1.
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Affiliation(s)
- A M Zink
- Institute of Human Genetics, Rheinische Friedrich-Wilhelms-University, Bonn, Germany
| | - E Wohlleber
- Institute of Human Genetics, Rheinische Friedrich-Wilhelms-University, Bonn, Germany
| | - H Engels
- Institute of Human Genetics, Rheinische Friedrich-Wilhelms-University, Bonn, Germany
| | - O K Rødningen
- Department of Medical Genetics, Oslo University Hospital, Oslo, Norway
| | - K Ravn
- Applied Human Molecular Genetics, Kennedy Center, Glostrup, Denmark
| | - S Heilmann
- Institute of Human Genetics, Rheinische Friedrich-Wilhelms-University, Bonn, Germany ; Department of Genomics, Life & Brain Center, Rheinische Friedrich-Wilhelms-University, Bonn, Germany
| | - J Rehnitz
- Molecular Genetics and Infertility Unit, Department of Gynecology, Endocrinology and Reproductive Medicine, University Women Hospital, Heidelberg, Germany
| | - N Katzorke
- Molecular Genetics and Infertility Unit, Department of Gynecology, Endocrinology and Reproductive Medicine, University Women Hospital, Heidelberg, Germany
| | - C Kraus
- Institute of Human Genetics, Friedrich-Alexander-University, Erlangen-Nuremberg, Germany
| | - S Blichfeldt
- Pediatric Department L55, Glostrup University Hospital, Glostrup, Denmark
| | - P Hoffmann
- Institute of Human Genetics, Rheinische Friedrich-Wilhelms-University, Bonn, Germany ; Department of Genomics, Life & Brain Center, Rheinische Friedrich-Wilhelms-University, Bonn, Germany ; Medical Genetics, Department of Biomedicine, University Hospital, Basel, Switzerland
| | - H Reutter
- Institute of Human Genetics, Rheinische Friedrich-Wilhelms-University, Bonn, Germany ; Department of Neonatology, Children's Hospital, Rheinische Friedrich-Wilhelms-University, Bonn, Germany
| | - F F Brockschmidt
- Institute of Human Genetics, Rheinische Friedrich-Wilhelms-University, Bonn, Germany ; Department of Genomics, Life & Brain Center, Rheinische Friedrich-Wilhelms-University, Bonn, Germany
| | - M Kreiß-Nachtsheim
- Institute of Human Genetics, Rheinische Friedrich-Wilhelms-University, Bonn, Germany
| | - P H Vogt
- Molecular Genetics and Infertility Unit, Department of Gynecology, Endocrinology and Reproductive Medicine, University Women Hospital, Heidelberg, Germany
| | - T E Prescott
- Department of Medical Genetics, Oslo University Hospital, Oslo, Norway
| | - Z Tümer
- Applied Human Molecular Genetics, Kennedy Center, Glostrup, Denmark ; Department of Cellular and Molecular Medicine, University of Copenhagen, Copenhagen, Denmark
| | - J A Lee
- Institute of Human Genetics, Rheinische Friedrich-Wilhelms-University, Bonn, Germany ; Department of Genomics, Life & Brain Center, Rheinische Friedrich-Wilhelms-University, Bonn, Germany ; Greenwood Genetic Center, Greenwood, S.C., USA
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Lee JA, Park HS. Relation between sleep duration, overweight, and metabolic syndrome in Korean adolescents. Nutr Metab Cardiovasc Dis 2014; 24:65-71. [PMID: 24188647 DOI: 10.1016/j.numecd.2013.06.004] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Revised: 06/11/2013] [Accepted: 06/11/2013] [Indexed: 12/28/2022]
Abstract
BACKGROUND AND AIMS The increasing prevalence of obesity has been paralleled by a trend of reduced sleep duration. Sleep is considered a modulator of neuroendocrine function. The aim of this study was to determine the relation between sleep duration, overweight, and metabolic syndrome in Korean adolescents. METHODS AND RESULTS This study was based on data from the Korean National Health and Nutrition Examination Survey (KNHANES) IV. Data from 1187 adolescents aged 12-18 years were included in the analysis. Subjects were classified according to self-reported sleep duration: ≤ 5 h, 6-7 h, 8-9 h, and ≥ 10 h. We analysed the association between sleep duration, overweight, and metabolic syndrome after adjustment for potential confounding variables. Body mass index (BMI), waist circumference (WC), and diastolic blood pressure (DBP) were higher in subjects who slept ≤ 5 h, and triglyceride level was higher in subjects who slept ≥ 10 h. According to logistic regression analysis, subjects who slept ≤ 5 h had a higher risk of overweight (odds ratio (OR) 2.04, 95% confidence interval (CI) 1.17-3.57) and elevated blood pressure (BP) (OR 2.11, 95% CI 1.22-3.65). We did not find any association between sleep duration and metabolic syndrome. Subjects who slept ≥ 10 h had a higher risk of hypertriglyceridemia (OR 2.17, 95% CI 1.14-4.13). CONCLUSION Short sleep duration was associated with overweight in adolescents. Although there was no association between sleep duration and metabolic syndrome, short sleep duration was associated with elevated BP and long sleep duration was associated with hypertriglyceridemia.
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Affiliation(s)
- J A Lee
- Department of Family Medicine, University of Ulsan College of Medicine, 88 Olympic-Ro 43-Gil, Songpa-gu, Seoul 138-736, Republic of Korea
| | - H S Park
- Department of Family Medicine, University of Ulsan College of Medicine, 88 Olympic-Ro 43-Gil, Songpa-gu, Seoul 138-736, Republic of Korea.
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Lee JA, Ahn YS, Cho YK. A Case of Melanocytoma Originating from the Iris. J Korean Ophthalmol Soc 2014. [DOI: 10.3341/jkos.2014.55.5.789] [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: 11/23/2022]
Affiliation(s)
- Jin Ah Lee
- Department of Ophthalmology, St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Korea
| | - Yong Sun Ahn
- Department of Ophthalmology, St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Korea
| | - Yang Kyung Cho
- Department of Ophthalmology, St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Korea
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Sok JC, Lee JA, Dasari S, Joyce S, Contrucci SC, Egloff AM, Trevelline BK, Joshi R, Kumari N, Grandis JR, Thomas SM. Collagen type XI α1 facilitates head and neck squamous cell cancer growth and invasion. Br J Cancer 2013; 109:3049-56. [PMID: 24231953 PMCID: PMC3859935 DOI: 10.1038/bjc.2013.624] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 09/11/2013] [Accepted: 09/18/2013] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Although it is well established that the extracellular matrix affects tumour progression, not much is known about the various components and their effect on head and neck squamous cell carcinoma (HNSCC) progression. Levels of collagen type XI α1 (colXIα1), a minor fibrillar collagen, have been shown to be increased in tumour compared with normal tissue in several cancers, including colorectal, breast, and non-small cell lung cancer. Currently, the functional significance of colXIα1 is not understood. METHODS We examined the expression levels of colXIα1 mRNA and elucidated the functional role of colXIα1 in HNSCC. Cell proliferation, invasion, and migration were examined with and without colXIα1 knockdown with siRNA in HNSCC cells. RESULTS Our data demonstrate that colXIα1 expression is increased in tumour samples compared with levels in normal adjacent tissue in 16/23 HNSCC patients. In addition, colα11 is increased in HNSCC cell lines compared with normal immortalised epithelial cells and is increased in tumour-derived fibroblasts compared with normal fibroblasts. Using an siRNA approach, we demonstrate that colXIα1 contributes to proliferation, migration, and invasion of HNSCC. CONCLUSION Our cumulative findings suggest that colXIα1 contributes to HNSCC tumorigenesis and may serve as a potential therapeutic target.
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Affiliation(s)
- J C Sok
- Department of Otolaryngology, University of Pittsburgh and University of Pittsburgh Cancer Institute, Pittsburgh, PA 15213, USA
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Lee SH, Lee JA, Park HS, Song YS, Jang YJ, Kim JH, Lee YJ, Heo Y. Associations among SPARC mRNA expression in adipose tissue, serum SPARC concentration and metabolic parameters in Korean women. Obesity (Silver Spring) 2013; 21:2296-302. [PMID: 23666856 DOI: 10.1002/oby.20183] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2011] [Accepted: 11/12/2012] [Indexed: 02/01/2023]
Abstract
OBJECTIVE Secreted protein acidic and rich in cysteine (SPARC) is expressed in most tissues and is also secreted by adipocytes. The associations of SPARC mRNA expression in visceral adipose tissue (VAT), subcutaneous abdominal adipose tissue (SAT), serum SPARC concentration, and metabolic parameters in Korean women are investigated. DESIGN AND METHODS This is a cross-sectional study. Fifty-eight women were recruited, of whom 15 women who underwent bariatric surgery for morbid obesity (BMI mean ± SD: 40.2±5.7 kg/m(2) ), 16 who underwent metabolic surgery for type 2 diabetes (BMI: 28.9±4.5 kg/m(2) ), and, as a control group, 27 who underwent gynecological surgery (BMI: 22.7±2.4 kg/m(2) ). Anthropometric variables, metabolic parameters, SPARC mRNA expression in adipose tissue, and serum SPARC concentration were measured. RESULTS In all subjects, SPARC mRNA expression was significantly higher in SAT than in VAT. Serum SPARC concentrations (mean ± SE) in morbidly obese subjects, subjects with type 2 diabetes, and normal weight subjects were 267.3±40.2 ng/mL, 130.4±33.0 ng/mL, and 53.1±2.8 ng/mL, respectively. SPARC mRNA in SAT was significantly correlated with BMI, whereas SPARC mRNA in VAT was significantly correlated with BMI and VAT area. Serum SPARC concentration was significantly correlated with BMI, waist circumference, total adipose tissue area, and SAT area. After BMI adjustment, serum SPARC concentration was significantly correlated with fasting insulin concentration and HOMA-IR score. Multivariate regression analysis showed that BMI and HOMA-IR were independently associated with serum SPARC concentration. CONCLUSIONS Serum SPARC concentration is significantly correlated with obesity indices and might be influenced by insulin resistance. These findings suggest that SPARC may contribute to the metabolic dysregulation associated with obesity in humans.
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MESH Headings
- Adipose Tissue/metabolism
- Adult
- Asian People
- Case-Control Studies
- Cross-Sectional Studies
- Diabetes Mellitus, Type 2/ethnology
- Diabetes Mellitus, Type 2/genetics
- Diabetes Mellitus, Type 2/metabolism
- Diabetes Mellitus, Type 2/surgery
- Female
- Gene Expression
- Humans
- Metabolism/genetics
- Middle Aged
- Obesity, Morbid/ethnology
- Obesity, Morbid/genetics
- Obesity, Morbid/metabolism
- Obesity, Morbid/surgery
- Osteonectin/blood
- Osteonectin/genetics
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Young Adult
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Affiliation(s)
- S H Lee
- Department of Family Medicine, University of Ulsan College of Medicine, Seoul, Korea
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Geets X, Grégoire V, Lee JA. Implementation of hypoxia PET imaging in radiation therapy planning. Q J Nucl Med Mol Imaging 2013; 57:271-282. [PMID: 24045623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Hypoxia has historically been relevant to radiation oncology as it relates to radioresistance, poor response to therapy and unfavorable patient's outcome in many solid tumors. In that regard, the recent advances in imaging, computation and radiation delivery techniques have been offering new perspectives to prescribe and deliver radiation dose in accordance with the spatial distribution of hypoxia mapped with molecular or functional imaging modalities, i.e., the so-called dose painting (DP). At first glance, the concept of dose painting appears promising and let foresee likely improvement in tumor local control at an acceptable clinical cost. However, adapting radiotherapy planning and delivery according to hypoxia imaging implicitly assumes: 1) that the imaging variable actually correlates with a local biological property associated with individual therapy outcome; 2) that the spatial distribution of the imaging parameter can be adequately converted into dose; and 3) that an irradiation device can actually deliver such a heterogeneous dose in fractionated RT treatments. In that regard, many uncertainties and difficulties remain at each step of the DP process, mainly related to the limitations of the current imaging techniques and the treatment fractionation. This paper will thus review the state of the art of DP with a specific focus on hypoxia, going from cancer biology to adaptive dose delivery. It will address the technological challenges and the clinical validation, which are both essential to translate an intuitively appealing concept into a clinically meaningful practice.
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Affiliation(s)
- X Geets
- Department of Radiation Oncology, Molecular Imaging Radiotherapy and Oncology (MIRO) Lab. Université Catholique de Louvain Cliniques Universitaires St-Luc, Brussels, Belgium -
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Kim B, Park SW, Kim JY, Yoo K, Lee JA, Lee MW, Lee DK, Kim JY, Kim B, Kim H, Han S, Son HJ, Ko MJ. Rapid dye adsorption via surface modification of TiO2 photoanodes for dye-sensitized solar cells. ACS Appl Mater Interfaces 2013; 5:5201-5207. [PMID: 23679678 DOI: 10.1021/am401034r] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A facile method for increasing the reaction rate of dye adsorption, which is the most time-consuming step in the production of dye-sensitized solar cells (DSSCs), was developed. Treatment of a TiO2 photoanode with aqueous nitric acid solution (pH 1) remarkably reduced the reaction time required to anchor a carboxylate anion of the dye onto the TiO2 nanoparticle surface. After optimization of the reaction conditions, the dye adsorption process became 18 times faster than that of the conventional adsorption method. We studied the influence of the nitric acid treatment on the properties of TiO2 nanostructures, binding modes of the dye, and adsorption kinetics, and found that the reaction rate improved via the synergistic effects of the following: (1) electrostatic attraction between the positively charged TiO2 surface and ruthenium anion increases the collision frequency between the adsorbent and the anchoring group of the dye; (2) the weak anchoring affinity of NO3(-) in nitric acid with metal oxides enables the rapid coordination of an anionic dye with the metal oxide; and (3) sufficient acidity of the nitric acid solution effectively increases the positive charge density on the TiO2 surface without degrading or transforming the TiO2 nanostructure. These results demonstrate the developed method is effective for reducing the overall fabrication time without sacrificing the performance and long-term stability of DSSCs.
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Affiliation(s)
- Boeun Kim
- Photo-Electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Republic of Korea
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Chung HE, Yu J, Baek M, Lee JA, Kim MS, Kim SH, Maeng EH, Lee JK, Jeong J, Choi SJ. Toxicokinetics of zinc oxide nanoparticles in rats. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/429/1/012037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [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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Walker MD, Rundek T, Homma S, DiTullio M, Iwata S, Lee JA, Choi J, Liu R, Zhang C, McMahon DJ, Sacco RL, Silverberg SJ. Effect of parathyroidectomy on subclinical cardiovascular disease in mild primary hyperparathyroidism. Eur J Endocrinol 2012; 167:277-85. [PMID: 22660025 PMCID: PMC3668344 DOI: 10.1530/eje-12-0124] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
OBJECTIVE We recently demonstrated that mild primary hyperparathyroidism (PHPT) is associated with increased carotid intima-media thickness (IMT) and stiffness, and increased aortic valve calcification. It is unclear whether parathyroidectomy (PTX) improves these abnormalities. The purpose of this study was to determine whether cardiovascular abnormalities in PHPT improve with PTX. DESIGN Forty-four patients with PHPT were studied using carotid ultrasound and transthoracic echocardiography before and after PTX. Carotid IMT, carotid plaque and stiffness, left ventricular mass index (LVMI), myocardial and valvular calcification, and diastolic function were measured before, 1- and 2-year post-PTX. RESULTS Two years after PTX, increased carotid stiffness tended to decline to the normal range (17%, P=0.056) while elevated carotid IMT did not improve. Carotid plaque number and thickness, LVMI and cardiac calcifications did not change after PTX, while some measures of diastolic function (isovolumic relaxation time (IVRT) and tissue Doppler peak early diastolic velocity) worsened within the normal range. Indices did improve in patients with cardiovascular abnormalities at baseline. Increased carotid stiffness improved by 28% (P=0.004), a decline likely to be of clinical significance. More limited improvements also occurred in elevated IMT (3%, P=0.017) and abnormal IVRT (13%, P<0.05), a measure of diastolic dysfunction. CONCLUSIONS In mild PHPT, PTX led to modest changes in some cardiovascular indices. Improvements were mainly evident in those with preexisting cardiovascular abnormalities, particularly elevated carotid stiffness. These findings are reassuring with regard to current international guidelines that do not include cardiovascular disease as a criterion for PTX.
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Affiliation(s)
- M D Walker
- Department of Medicine, Columbia University College of Physicians and Surgeons, New York, New York 10032, USA.
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Kleffmann W, Zink AM, Lee JA, Senderek J, Mangold E, Moog U, Rappold GA, Wohlleber E, Engels H. 5q31 Microdeletions: Definition of a Critical Region and Analysis of LRRTM2, a Candidate Gene for Intellectual Disability. Mol Syndromol 2012; 3:68-75. [PMID: 23326251 DOI: 10.1159/000341252] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [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: 05/29/2012] [Indexed: 11/19/2022] Open
Abstract
Microdeletions including 5q31 have been reported in only few patients to date. Apart from intellectual disability/developmental delay (ID/DD) of varying degrees, which is common to all reported patients, the clinical spectrum is wide and includes short stature, failure to thrive, congenital heart defects, encephalopathies, and dysmorphic features. We report a patient with a 0.9-Mb de novo deletion in 5q31.2, the smallest microdeletion in 5q31 reported thus far. His clinical presentation includes mild DD, borderline short stature, postnatal microcephaly, and mild dysmorphic signs including microretrognathia. Together with data from 7 reported overlapping microdeletions, analysis of our patient enabled the tentative delineation of a phenotype map for 5q31 deletions. In contrast to the mild phenotype of small microdeletions affecting only 5q31.2, carriers of larger microdeletions which also include subbands 5q31.1 and/or 5q31.3 seem to be more severely affected with congenital malformations, growth anomalies, and severe encephalopathies. A 240-kb smallest region of overlap in 5q31.2 is delineated which contains only 2 genes, CTNNA1 and LRRTM2. We propose LRRTM2 as the most promising candidate gene for ID/DD due to its expression pattern, function as a key regulator of excitatory development, and interaction with Neurexin 1. However, sequence analysis of LRRTM2 in 330 patients with ID/DD revealed no relevant alterations, excluding point mutations in LRRTM2 as a frequent cause of ID/DD in patients without microdeletions.
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Affiliation(s)
- W Kleffmann
- Institute of Human Genetics, Life and Brain Center, University of Bonn, Bonn, Germany
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Thorwarth D, Beyer T, Boellaard R, de Ruysscher D, Grgic A, Lee JA, Pietrzyk U, Sattler B, Schaefer A, van Elmpt W, Vogel W, Oyen WJG, Nestle U. Integration of FDG-PET/CT into external beam radiation therapy planning: technical aspects and recommendations on methodological approaches. Nuklearmedizin 2012; 51:140-53. [PMID: 22473130 DOI: 10.3413/nukmed-0455-11-12] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Accepted: 03/19/2012] [Indexed: 12/20/2022]
Abstract
UNLABELLED This work addresses the clinical adoption of FDG-PET/CT for image-guided radiation therapy planning (RTP). As such, important technical and methodological aspects of PET/CT-based RTP are reviewed and practical recommendations are given for routine patient management and clinical studies. First, recent developments in PET/CT hardware that are relevant to RTP are reviewed in the context of quality control and system calibration procedures that are mandatory for a reproducible adoption of PET/CT in RTP. Second, recommendations are provided on image acquisition and reconstruction to support the standardization of imaging protocols. A major prerequisite for routine RTP is a complete and secure data transfer to the actual planning system. Third, state-of-the-art tools for image fusion and co-registration are discussed briefly in the context of PET/CT imaging pre- and post-RTP. This includes a brief review of state-of-the-art image contouring algorithms relevant to PET/CT-guided RTP. Finally, practical aspects of clinical workflow and patient management, such as patient setup and requirements for staff training are emphasized. PET/CT-guided RTP mandates attention to logistical aspects, patient set-up and acquisition parameters as well as an in-depth appreciation of quality control and protocol standardization. CONCLUSION Upon fulfilling the requirements to perform PET/CT for RTP, a new dimension of molecular imaging can be added to traditional morphological imaging. As a consequence, PET/CT imaging will support improved RTP and better patient care. This document serves as a guidance on practical and clinically validated instructions that are deemed useful to the staff involved in PET/CT-guided RTP.
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Affiliation(s)
- D Thorwarth
- University Hospital for Radiation Oncology, Section for Biomedical Physics, Eberhard-Karls University Tübingen, Germany.
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