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Jung Y, Lee H, Jun H, Cho S. Evaluation of Motion Artifact Correction Technique for Cone-Beam Computed Tomography Image Considering Blood Vessel Geometry. J Clin Med 2024; 13:2253. [PMID: 38673526 PMCID: PMC11050711 DOI: 10.3390/jcm13082253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Revised: 03/07/2024] [Accepted: 04/09/2024] [Indexed: 04/28/2024] Open
Abstract
Background: In this study, we present a quantitative method to evaluate the motion artifact correction (MAC) technique through the morphological analysis of blood vessels in the images before and after MAC. Methods: Cone-beam computed tomography (CBCT) scans of 37 patients who underwent transcatheter chemoembolization were obtained, and images were reconstructed with and without the MAC technique. First, two interventional radiologists selected the blood vessels corrected by MAC. We devised a motion-corrected index (MCI) metric that analyzed the morphology of blood vessels in 3D space using information on the centerline of blood vessels, and the blood vessels selected by the interventional radiologists were quantitatively evaluated using MCI. In addition, these blood vessels were qualitatively evaluated by two interventional radiologists. To validate the effectiveness of the devised MCI, we compared the MCI values in a blood vessel corrected by MAC and one non-corrected by MAC. Results: The visual evaluation revealed that motion correction was found in the images of 23 of 37 patients (62.2%), and a performance evaluation of MAC was performed with 54 blood vessels in 23 patients. The visual grading analysis score was 1.56 ± 0.57 (radiologist 1) and 1.56 ± 0.63 (radiologist 2), and the proposed MCI was 0.67 ± 0.11, indicating that the vascular morphology was well corrected by the MAC. Conclusions: We verified that our proposed method is useful for evaluating the MAC technique of CBCT, and the MAC technique can correct the blood vessels distorted by the patient's movement and respiration.
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Affiliation(s)
- Yunsub Jung
- Department of Materials and Production, Aalborg University, 9220 Aalborg East, Denmark;
| | - Ho Lee
- Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul 03722, Republic of Korea;
| | - Hoyong Jun
- Department of Radiology, College of Medicine, Ewha Womans University, Seoul 03760, Republic of Korea;
| | - Soobuem Cho
- Department of Radiology, College of Medicine, Ewha Womans University, Seoul 03760, Republic of Korea;
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Jun H, Shi Z, Mattke S. Projected Savings to Canadian Provincial Budgets from Reduced Long-Term Care Home Utilization Due to a Disease-Modifying Alzheimer's Treatment. J Prev Alzheimers Dis 2024; 11:179-184. [PMID: 38230731 DOI: 10.14283/jpad.2023.95] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
BACKGROUND A disease-modifying Alzheimer's treatment could provide budgetary savings to Canadian provinces from a reduction in long-term care home use, yet we do not know the magnitude of those potential savings. OBJECTIVE We project savings to each Canadian province's budget from 2023 to 2043. DESIGN Annual savings are projected using a Markov model. We account for reduction in long-term care home use and in use of Alternative Level of Care (ALC) beds, which are hospital beds occupied by care home-eligible patients on the wait list for admission. RESULTS A treatment that delays disease progression by 40% is projected to avoid 142,507 long-term care home and ALC years, resulting in $17.2 billion cumulative savings across all Canadian provinces, a 21% relative reduction among treatment eligible patients. Average per capita savings were $1,132, ranging from $734 (Alberta) to $2,895 (Prince Edward Island). Cumulative savings could increase to $22.7 billion with enhanced triage of patients in primary care stages and to $25.6 billion if all capacity constraints for diagnosis and treatment were removed. CONCLUSION A disease-modifying treatment could create budgetary savings from lower long-term care home use, offsetting part of the treatment cost. With the increasing demand for long-term care home beds and the high rates of patients being held in hospitals while wait-listed, such a treatment could additionally provide relief to the overburdened long-term care system in Canada.
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Affiliation(s)
- H Jun
- Dr. Soeren Mattke, Center for Economic and Social Research, University of Southern California, 635 Downey Way, #505N, Los Angeles, CA 90089, USA, ; Phone: (202) 468-5797
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Mattke S, Jun H, Hanson M, Chu S, Kordower JH, Reiman EM. Health Economic Considerations in the Deployment of an Alzheimer's Prevention Therapy. J Prev Alzheimers Dis 2024; 11:303-309. [PMID: 38374736 DOI: 10.14283/jpad.2024.23] [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] [Indexed: 02/21/2024]
Abstract
INTRODUCTION As treatments for secondary prevention of Alzheimer's disease (AD) are being studied, concerns about their value for money have appeared. We estimate cost-effectiveness of a hypothetical screening and prevention program. METHODS We use a Markov model to project cost-effectiveness of a treatment that reduces progression to symptomatic AD by 50% with either chronic treatment until progression to mild cognitive impairment or treatment for one year followed by monitoring with AD blood tests and retreatment with one dose in case of amyloid re-accumulation. Diagnoses would be made with an AD blood test with sensitivity and specificity of 80%, and inconclusive results in 20%. Individuals testing negative would be re-tested in five years and those with inconclusive results in one. RESULTS The program would generate per-person value of $53,721 from a payer (reduction of direct cost and patient QALY gains) and $69,861 from a societal perspective (adding valuation of reduced caregiver burden). With chronic treatment, it would be cost-effective up to annual drug prices of $7,000 and $10,300, respectively. Time-limited treatment would be cost-effective at annual drug prices of $54,257 and $78,458 from a payer and societal perspective, respectively. Higher specificity of the blood test would decrease cost per person with similar value generation DISCUSSION: A hypothetical prevention treatment for AD could be economically viable from a payer and societal perspective.
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Affiliation(s)
- S Mattke
- Soeren Mattke, M.D., D.Sc., Director, Center for Improving Chronic Illness Care, Research Professor of Economics, USC Dornsife, 635 Downey Way, #505N, Los Angeles, CA 90089, Mobile: +1 202 468 5797,
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Liu Y, Jun H, Becker A, Wallick C, Mattke S. Detection Rates of Mild Cognitive Impairment in Primary Care for the United States Medicare Population. J Prev Alzheimers Dis 2024; 11:7-12. [PMID: 38230712 PMCID: PMC10995024 DOI: 10.14283/jpad.2023.131] [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: 08/15/2023] [Accepted: 09/17/2023] [Indexed: 01/18/2024]
Abstract
BACKGROUND Existing evidence points to substantial gaps in detecting mild cognitive impairment in primary care but is based on limited or self-reported data. The recent emergence of disease-modifying treatments for the Alzheimer's disease, the most common etiology of mild cognitive impairment, calls for a systematic assessment of detection rates in primary care. OBJECTIVES The current study aims to examine detection rates for mild cognitive impairment among primary care clinicians and practices in the United States using Medicare claims and encounter data. DESIGN Observational study. SETTING Medicare administrative data. PARTICIPANTS The study sample includes a total of 226,756 primary care clinicians and 54,597 practices that had at least 25 patients aged 65 or older, who were enrolled in Medicare fee-for-service or a Medicare Advantage plan between 2017 and 2019. MEASUREMENTS The detection rate for mild cognitive impairment is assessed as the ratio between the observed diagnosis rate of a clinician or practice as documented in the data, and the expected rate based on a predictive model. RESULTS The average detection rates for mild cognitive impairment is 0.08 (interquartile range=0.00-0.02) for both clinicians and practices, suggesting that only about 8% of expected cases were diagnosed on average. Only 0.1% of clinicians and practices had diagnosis rates within the expected range. CONCLUSIONS Mild cognitive impairment is vastly underdiagnosed, pointing to an urgent need to improve early detection in primary care.
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Affiliation(s)
- Y Liu
- Ying Liu, PhD, Center for Economic and Social Research, University of Southern California, 635 Downey Way, Los Angeles, CA 90089, USA,
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Jun H, Hur S, Jeong YS, Kang CH, Lee H. Thoracic duct embolization in treating postoperative chylothorax: does bail-out retrograde access improve outcomes? Eur Radiol 2021; 32:377-383. [PMID: 34247305 DOI: 10.1007/s00330-021-08145-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 02/07/2021] [Revised: 05/25/2021] [Accepted: 06/08/2021] [Indexed: 11/25/2022]
Abstract
OBJECTIVES To evaluate clinical outcomes of thoracic duct embolization (TDE) for the management of postoperative chylothorax with the aid of the bail-out retrograde approach for thoracic duct cannulation (TDC). MATERIALS AND METHODS Forty-five patients with postoperative chylothorax underwent Lipiodol lymphangiography (LLG) between February 2016 and November 2019. If targetable central lymphatic vessels were identified in LLG, TDC, a prerequisite for TDE, was attempted. While the conventional antegrade transabdominal approach was the standard TDC method, the retrograde approach was applied as a bail-out method. Embolization, the last step of TDE, was performed after confirming leakages in the trans-TDC catheter lymphangiography. Technical and clinical success rates were determined retrospectively. RESULTS TDC was attempted in 40 among 45 patients based on LLG findings. The technical success rate of TDC with the conventional antegrade approach was 78% (31/40). In addition, six more patients were cannulated using the bail-out retrograde approach, which raised the technical success rate to 93% (37/40). While 35 patients underwent embolization (TDE group), ten patients did not (non-TDE group) for the following reasons: (1) lack of targetable lymphatics for TDC in LLG (n = 5), (2) technical failure of TDC (n = 3), and (3) lack of discernible leakages in the transcatheter lymphangiography (n = 2). The clinical success of the TDE group was 89% (31/35), compared with 50% (5/10) of the non-TDE group. One major procedure-related complication was bile peritonitis caused by the needle passage of the distended gallbladder. CONCLUSIONS Bail-out retrograde approach for TDC could improve the overall technical success of TDC significantly. KEY POINTS • Bail-out retrograde thoracic duct access may improve the overall technical success of thoracic duct access, thus improving the clinical success of thoracic duct embolization.
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Affiliation(s)
- Hoyong Jun
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Saebeom Hur
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea.
- Department of Radiology, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea.
| | - Yun Soo Jeong
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Chang Hyun Kang
- Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Hyukjoon Lee
- Department of Radiology, Christchurch Hospital, Christchurch, New Zealand
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Hur S, Jun H, Jeong YS. Novel interventional radiological management for lymphatic leakages after gynecologic surgery: lymphangiography and embolization. Gland Surg 2021; 10:1260-1267. [PMID: 33842273 DOI: 10.21037/gs-2019-ursoc-10] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Post-operative lymphatic leakage is a common complication of a radical gynecologic surgery involving aggressive lymph node dissection. Its manifestation varies from asymptomatic lymphoceles to life-threatening chylous ascites. In the past, nuclear medicine lymphoscintigraphy was the sole imaging modality for the confirmation of the leakage, of which application is limited due to its poor spatial resolution. While a conservative treatment with percutaneous drainage was the mainstream treatment method, surgical exploration was the last resort for the recalcitrant leakages. Recently, there have been a series of innovations in the field of interventional radiology, including intranodal Lipiodol® lymphangiography, dynamic magnetic resonance (MR) lymphangiography, lymphatic embolization, and mesenteric lymph node lymphangiography. Intranodal Lipiodol® lymphangiography provides very reliable and secure access to the lymphatic system, while requiring only fundamental skills and equipment available to all interventional radiologists. Besides, Lipiodol® is being received a spotlight for its potential therapeutic effects on refractory lymphatic leakage. Dynamic MR lymphangiography plays a vital role in the diagnosis and management of non-traumatic lymphatic diseases, as well as in the post-operative lymphatic leakage with its superior contrast, spatial and temporal resolution. Lymphatic embolization is a technique of using N-BCA glue, a liquid embolic agent, for lymphatic leakages. It can be further described as lymphopseudoaneurysm (LPA) embolization or lymph node embolization, according to which structure is being embolized. Lymphatic embolization opened a new realm of possibilities in the field of interventional lymphology, resulting in the development of treatment approaches for chylous ascites and lymphoceles. Mesenteric lymph node lymphangiography offers the opacification of the upstream mesenteric chylous lymphatic system and can detect lymphatic leakage from the intestinal trunk or the more proximal parts of the mesenteric lymphatic system. With the advent of these latest interventional radiological techniques, more comprehensive approaches to the management of recalcitrant post-operative lymphatic leakages have been enabled.
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Affiliation(s)
- Saebeom Hur
- Department of Radiology, Seoul National University Hospital, Seoul, Korea
| | - Hoyong Jun
- Department of Radiology, Seoul National University Hospital, Seoul, Korea
| | - Yoon Soo Jeong
- Department of Radiology, Seoul National University Hospital, Seoul, Korea
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Jun H, Hur S. Interventional Radiology Treatment for Postoperative Chylothorax. Korean J Thorac Cardiovasc Surg 2020; 53:200-204. [PMID: 32793452 PMCID: PMC7409884 DOI: 10.5090/kjtcs.2020.53.4.200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 06/22/2020] [Accepted: 07/01/2020] [Indexed: 01/26/2023]
Abstract
Postoperative chylothorax is a rare occurrence after various thoracic surgical procedures, but it poses a substantial risk of morbidity and mortality. Thoracic duct embolization (TDE) is currently deemed the optimal treatment due to its safety and efficacy. This review offers an introduction to interventional options in this setting, detailing the steps of TDE for the edification of those engaged in postoperative care.
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Affiliation(s)
- Hoyong Jun
- Department of Radiology, Seoul National University Hospital, Seoul, Korea
| | - Saebeom Hur
- Department of Radiology, Seoul National University Hospital, Seoul, Korea
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Lee Y, Koo H, Kim M, Lee J, Hwang S, Moon J, Park H, Sung A, Choi Y, Jun H, Nam E. Neuroregenerative evidences demonstrated by diverse MRI analysis in cerebral palsy children who showed significant clinical improvement following repeated G-CSF injection. Cytotherapy 2020. [DOI: 10.1016/j.jcyt.2020.03.363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Sacco P, Jun H, Hochheimer M, Kuerbis A, Moore A. SOCIODEMOGRAPHIC AND HEALTH RELATED CORRELATES OF PAST YEAR HELP SEEKING FOR ALCOHOL AND DRUG USE: DIFFERENCES BY AGE. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.2004] [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: 11/13/2022] Open
Affiliation(s)
| | | | | | - A Kuerbis
- Hunter College, City University of New York
| | - A Moore
- University of California-San Diego
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Lim M, Jun H. THE RELATIONSHIPS BETWEEN KOREAN ADULT CHILDREN’S OUTCOMES AND THEIR PARENTS’ PSYCHOLOGICAL WELLBEING. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.2479] [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: 11/14/2022] Open
Affiliation(s)
- M Lim
- Department of Child and Famliy Studies, Yonsei University, Seoul, 03722, Korea
| | - H Jun
- Yonsei University, Seoul, Republic of Korea
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Song S, Jun H, Joo S. THE MODERATING EFFECT OF SELF-RATED HEALTH IN BETWEEN GRANDPARENTING AND DEPRESSIVE SYMPTOMS AMONG GRANDPARENTS. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1091] [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: 11/13/2022] Open
Affiliation(s)
| | - H Jun
- Yonsei University, Seoul, Republic of Korea
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Park H, Jun H, Joo S. THE EFFECT OF SIMILARITY IN GENDER ROLE ATTITUDE ON MARITAL SATISFACTION AMONG MIDDLE-AGED COUPLES. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1042] [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: 11/14/2022] Open
Affiliation(s)
| | - H Jun
- Yonsei University, Seoul, Republic of Korea
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Lee S, Jun H, Joo S, Chai H, Sin N, Almeida D. THE INTERPLAY BETWEEN DAILY POSITIVE EVENTS AND DAILY STRESS SEVERITY ON INFLAMMATION IN ADULTHOOD. Innov Aging 2018. [DOI: 10.1093/geroni/igy031.3709] [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: 11/13/2022] Open
Affiliation(s)
| | - H Jun
- . Yonsei University, Seoul, Republic of Korea
| | | | - H Chai
- The Pennsylvania State University
| | - N Sin
- University of British Columbia
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Lee E, Jun H. GRANDPARENTING OF KOREAN GRANDMOTHERS AND THEIR DEPRESSIVE SYMPTOMS: USING PROPENSITY SCORE MATCHING. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.2459] [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: 11/13/2022] Open
Affiliation(s)
| | - H Jun
- Yonsei University, Seoul, Republic of Korea
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Lee K, Jun H, Joo S. THE EFFECTS OF MONETARY REWARDS FOR GRANDCHILD CARE ON THE MENTAL HEALTH OF GRANDPARENTS IN DIFFERENT INCOME CONTEXTS. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1090] [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: 11/13/2022] Open
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Choi B, Jun H. THE ASSOCIATIONS OF LEISURE ACTIVITY AND HEALTH AMONG KOREAN BABY BOOMERS. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1409] [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: 11/14/2022] Open
Affiliation(s)
- B Choi
- Yonsei University, Seoul, Seoul-t’ukpyolsi, Republic of Korea
| | - H Jun
- Child and Family Studies, Yonsei University, Seoul, Republic of Korea
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Park H, Jun H, Joo S. THE EFFECT OF GRANDCHILD CARE ON SPOUSAL RELATIONSHIP SATISFACTION OF GRANDPARENTS: A COARSENED EXACT MATCHING. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1089] [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: 11/15/2022] Open
Affiliation(s)
| | - H Jun
- Yonsei University, Seoul, Republic of Korea
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Kim DI, Liao J, Emont MP, Park MJ, Jun H, Ramakrishnan SK, Lin JD, Shah YM, Omary MB, Wu J. An OLTAM system for analysis of brown/beige fat thermogenic activity. Int J Obes (Lond) 2018; 42:939-945. [PMID: 29359735 PMCID: PMC5962373 DOI: 10.1038/ijo.2017.308] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 10/12/2017] [Accepted: 11/22/2017] [Indexed: 12/13/2022]
Abstract
BACKGROUND/OBJECTIVES Thermogenic fat is present in humans and emerging evidence indicates that increasing the content and activity of these adipocytes may lead to weight loss and improved metabolic health. Multiple reporter systems have been developed to assay thermogenic fat activity based on the transcriptional and translational activation of Ucp1, the key molecule that mediates nonshivering thermogenesis. Our study aims to develop a much-needed tool to monitor thermogenic fat activity through a mechanism independent of Ucp1 regulation, therefore effectively assaying not only canonical β-adrenergic activation but also various non-UCP1-mediated thermogenic pathways that have been increasingly appreciated. METHODS We detected increased luciferase activity upon thermogenic activation in interscapular brown and inguinal subcutaneous fat in ODD-Luc mice, a hypoxia reporter mouse model. We then developed an OLTAM (ODD-Luc based Thermogenic Activity Measurement) system to assay thermogenic fat cell activity. RESULTS In both primary murine and human adipocytes and an immortalized adipose cell line that were transduced with the OLTAM system, luciferase activity can be readily measured and visualized by bioluminescence imaging in response to a variety of stimuli, including UCP1-independent thermogenic signaling. This system can offer a convenient method to assay thermogenic activity for both basic and translational research. CONCLUSIONS The OLTAM system offers a convenient way to measure of the activation of thermogenic fat and presents opportunities to discover novel signaling pathways and unknown compounds targeting metabolically active adipocytes to counteract human obesity.
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Affiliation(s)
- D-I Kim
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - J Liao
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA.,Department of Endocrinology and Metabolism, 2nd Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - M P Emont
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA.,Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
| | - M-J Park
- Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
| | - H Jun
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - S K Ramakrishnan
- Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
| | - J D Lin
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA.,Department of Cell & Developmental Biology, University of Michigan, Ann Arbor, MI, USA
| | - Y M Shah
- Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
| | - M B Omary
- Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
| | - J Wu
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA.,Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
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Song S, Lee E, Jun H, Lee K, Yoon D. THE EFFECTS OF EMPLOYMENT ON DEPRESSION AMONG OLDER ADULTS: MEDIATING ROLE OF SELF-EESTEEM. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.4476] [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: 11/14/2022] Open
Affiliation(s)
- S. Song
- Dep. of child and family studies, Yonsei University, Seoul, Korea (the Republic of)
| | - E. Lee
- Dep. of child and family studies, Yonsei University, Seoul, Korea (the Republic of)
| | - H. Jun
- Dep. of child and family studies, Yonsei University, Seoul, Korea (the Republic of)
| | - K. Lee
- Dep. of child and family studies, Yonsei University, Seoul, Korea (the Republic of)
| | - D. Yoon
- Dep. of child and family studies, Yonsei University, Seoul, Korea (the Republic of)
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Hye Lim S, Jun H, Joo S, Kim S. AN EMPIRICAL TEST OF ROLE THEORY IN THE RELATIONSHIP BETWEEN WIDOWHOOD AND LIFE SATISFACTION. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.1241] [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: 11/14/2022] Open
Affiliation(s)
- S. Hye Lim
- Yonsei University, Seoul, Korea (the Republic of)
| | - H. Jun
- Yonsei University, Seoul, Korea (the Republic of)
| | - S. Joo
- Yonsei University, Seoul, Korea (the Republic of)
| | - S. Kim
- Yonsei University, Seoul, Korea (the Republic of)
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Park H, Jun H, Joo S. THE PATTERN OF GENDER ROLE ATTITUDE AND MARITAL QUALITY AMONG MIDDLE-AGED KOREANS. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.2018] [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: 11/14/2022] Open
Affiliation(s)
- H. Park
- Child and Family Studies, Yonsei University, Seoul, Korea (the Republic of)
| | - H. Jun
- Child and Family Studies, Yonsei University, Seoul, Korea (the Republic of)
| | - S. Joo
- Child and Family Studies, Yonsei University, Seoul, Korea (the Republic of)
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Joo S, Jun H, Bomi C. THE EFFECTS OF PHYSICAL LIMIT AND NEIGHBORHOOD COMPOSITION ON DEPRESSIVE SYMPTOMS IN LATER LIFE. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.3099] [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: 11/14/2022] Open
Affiliation(s)
- S. Joo
- Dept. of Child and Family Studies, Yonsei, Seoul, Korea (the Republic of)
| | - H. Jun
- Dept. of Child and Family Studies, Yonsei, Seoul, Korea (the Republic of)
| | - C. Bomi
- Dept. of Child and Family Studies, Yonsei, Seoul, Korea (the Republic of)
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Jun H, Jung CW, Lim S, Kim MG. Kidney Donor Risk Index as the Predictor for the Short-term Clinical Outcomes After Kidney Transplant From Deceased Donor With Acute Kidney Injury. Transplant Proc 2017; 49:88-91. [PMID: 28104166 DOI: 10.1016/j.transproceed.2016.11.003] [Citation(s) in RCA: 10] [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: 02/06/2023]
Abstract
BACKGROUND The Kidney Donor Risk Index (KDRI) scoring system for deceased donors has been widely introduced for postoperative evaluation of graft function. We analyzed the usefulness of the KDRI in deceased donors with acute kidney injury (AKI). METHODS Forty-nine recipients from deceased donors with AKI between January 2009 and December 2014 were reviewed retrospectively. Data collected from donor medical records included age, height, weight, hypertension or diabetes history, cause of death, serum creatinine (sCr), and donation after cardiac death. Graft function data including sCr, estimated glomerular filtration rate (eGFR), and acute rejection episodes were monitored for 1 year. Correlations between KDRI score and factors indicating graft function were analyzed. A cutoff value for KDRI score was calculated using a receiver operating characteristic (ROC) curve for significant graft function. RESULTS The mean ages of donors and recipients were 46.81 ± 13.13 and 47.69 ± 11.43, respectively. The mean KDRI score was 1.24 ± 0.40. Univariable analysis of KDRI score and factors indicating graft function indicated that sCr at 6 to 12 months, eGFR at 1 year, and slow graft function (SGF) had statistical significance. The ROC curve of KDRI score for SGF showed an optimal cutoff value of 1.20, with sensitivity of 69.2% and specificity of 69.4% (area under the curve = 0.75) in deceased donors with AKI. CONCLUSIONS KDRI score in deceased donors with AKI was correlated with postoperative graft values including eGFR and SGF. KDRI could be used as a predictor for the short-term clinical outcome after kidney transplant from deceased donor with AKI.
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Affiliation(s)
- H Jun
- Department of Surgery, Korea University Anam Hospital, Seoul, Korea
| | - C W Jung
- Department of Surgery, Korea University Anam Hospital, Seoul, Korea.
| | - S Lim
- Department of Internal Medicine, Korea University Anam Hospital, Seoul, Korea
| | - M G Kim
- Department of Internal Medicine, Korea University Anam Hospital, Seoul, Korea
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Yu YD, Kim SJ, Jang YS, Jung SW, Han JH, Jun H, Jung CW, Kim DS. Factors Delaying Organ Procurement After Declaration of Brain Death in Korea. Transplant Proc 2016; 48:2403-2406. [DOI: 10.1016/j.transproceed.2016.02.095] [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] [Received: 12/19/2015] [Accepted: 02/02/2016] [Indexed: 11/15/2022]
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25
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Jun H, Jung CW, Kim MG, Park KT. Experiences on Conversion to Once-Daily Advagraf and Sirolimus Combination in Stable Kidney Recipients. Transplant Proc 2014; 46:400-2. [DOI: 10.1016/j.transproceed.2014.01.004] [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] [Received: 10/01/2013] [Revised: 12/27/2013] [Accepted: 01/13/2014] [Indexed: 01/05/2023]
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26
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Jang MH, Kitabatake Y, Kang E, Jun H, Pletnikov MV, Christian KM, Hen R, Lucae S, Binder EB, Song H, Ming GI. Secreted frizzled-related protein 3 (sFRP3) regulates antidepressant responses in mice and humans. Mol Psychiatry 2013; 18. [PMID: 23207650 PMCID: PMC3970729 DOI: 10.1038/mp.2012.158] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [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: 11/09/2022]
Affiliation(s)
- M-H Jang
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA,Department of Neurologic Surgery, Department of Biochemistry and Molecular Biology, Mayo College of Medicine, Rochester, MN, USA
| | - Y Kitabatake
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA,Department of Pediatrics, Osaka University School of Medicine, Osaka, Japan
| | - E Kang
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA,Pre-doctoral Program in Human Genetics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - H Jun
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - MV Pletnikov
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA,Department of Psychiatry, Johns Hopkins University School of Medicine, Baltimore, MD, USA,The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - KM Christian
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - R Hen
- Department of Psychiatry, Columbia University, New York, NY, USA,The New York State Psychiatric Institute, New York, NY, USA
| | - S Lucae
- Max Planck Institute of Psychiatry, Munich, Germany
| | - EB Binder
- Max Planck Institute of Psychiatry, Munich, Germany,Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, USA
| | - H Song
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA,Pre-doctoral Program in Human Genetics, Johns Hopkins University School of Medicine, Baltimore, MD, USA,The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - G-I Ming
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA,The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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Yang FH, Zhang B, Zhou DJ, Bie L, Tom MW, Drummond DC, Nicolaides T, Mueller S, Banerjee A, Park JW, Prados MD, James DC, Gupta N, Hashizume R, Strohbehn GW, Zhou J, Fu M, Patel TR, Piepmeier JM, Saltzman WM, Xie Q, Johnson J, Bradley R, Ascierto ML, Kang L, Koeman J, Marincola FM, Briggs M, Tanner K, Vande Woude GF, Tanaka S, Klofas LK, Wakimoto H, Borger DR, Iafrate AJ, Batchelor TT, Chi AS, Madhankumar AB, Slagle-Webb B, Rizk E, Harbaugh K, Connor JR, Sarkar G, Curran GL, Jenkins RB, Kurozumi K, Ichikawa T, Onishi M, Fujii K, Ishida J, Shimazu Y, Date I, Ebsworth K, Walters MJ, Ertl LS, Wang Y, Berahovich RD, Zhang P, Powers JP, Liu SC, Al Omran R, Sullivan TJ, Jaen JC, Brown M, Schall TJ, Yusuke N, Shimizu S, Shishido-Hara Y, Shiokawa Y, Nagane M, Wang J, Sai K, Chen FR, Chen ZP, Shi Z, Zhang J, Zhang K, Han L, Chen L, Qian X, Zhang A, Wang G, Jia Z, Pu P, Kang C, Kong LY, Doucette TA, Ferguson SD, Hachem J, Yang Y, Wei J, Priebe W, Fuller GN, Qiao W, Rao G, Heimberger AB, Chen PY, Ozawa T, Drummond D, Santos R, Torre JD, Ng C, Lepe EL, Butowski N, Prados M, Bankiewicz K, James CD, Cheng Z, Gong Y, Ma Y, Muller-Knapp S, Knapp S, Wang J, Fujii K, Kurozumi K, Ichikawa T, Onishi M, Shimazu Y, Ishida J, Antonio Chiocca E, Kaur B, Date I, Yu JS, Judkowski V, Bunying A, Ji J, Li Z, Bender J, Pinilla C, Srinivasan V, Dombovy-Johnson M, Carson-Walter E, Walter K, Xu Z, Popp B, Schlesinger D, Gray L, Sheehan J, Keir ST, Friedman HS, Bigner DD, Kut C, Tyler B, McVeigh E, Li X, Herzka D, Grossman S, Lasky JL, Wang Y, Panosyan E, Meisen WH, Hardcastle J, Wojton J, Wohleb E, Alvarez-Breckenridge C, Nowicki M, Godbout J, Kaur B, Lee SY, Slagle-Webb B, Sheehan JM, Connor JR, Yin S, Kaluz S, Devi SN, de Noronha R, Nicolaou KC, Van Meir EG, Lachowicz JE, Demeule M, Che C, Tripathy S, Jarvis S, Currie JC, Regina A, Nguyen T, Castaigne JP, Zielinska-Chomej K, Mohanty C, Viktorsson K, Lewensohn R, Driscoll JJ, Alsidawi S, Warnick RE, Rixe O, deCarvalho AC, Irtenkauf S, Hasselbach L, Xin H, Mikkelsen T, Sherman JH, Siu A, Volotskova O, Keidar M, Gibo DM, Dickinson P, Robertson J, Rossmeisl J, Debinski W, Nair S, Schmittling R, Boczkowski D, Archer G, Bigner DD, Sampson JH, Mitchell DA, Miller IS, Didier S, Murray DW, Issaivanan M, Coniglio SJ, Segall JE, Al-Abed Y, Symons M, Fotovati A, Hu K, Wakimoto H, Triscott J, Bacha J, Brown DM, Dunn SE, Daniels DJ, Peterson TE, Dietz AB, Knutson GJ, Parney IF, Diaz RJ, Golbourn B, Picard D, Smith C, Huang A, Rutka J, Saito N, Fu J, Yao J, Wang S, Koul D, Yung WKA, Fu J, Koul D, Yao J, Wang S, Yuan Y, Sulman EP, Colman H, Lang FF, Yung WKA, Slat EA, Herzog ED, Rubin JB, Brown M, Carminucci AS, Amendolara B, Leung R, Lei L, Canoll P, Bruce JN, Wojton JA, Chu Z, Kwon CH, Chow LM, Palascak M, Franco R, Bourdeau T, Thornton S, Qi X, Kaur B, Kitange GJ, Mladek AC, Su D, Carlson BL, Schroeder MA, Pokorny JL, Bakken KK, Gupta SK, Decker PA, Wu W, Sarkaria JN, Colman H, Oddou MP, Mollard A, Call LT, Vakayalapati H, Warner SL, Sharma S, Bearss DJ, Chen TC, Cho H, Wang W, Hofman FM, Flores CT, Snyder D, Sanchez-Perez L, Pham C, Friedman H, Bigner DD, Sampson JH, Mitchell DA, Woolf E, Abdelwahab MG, Turner G, Preul MC, Lynch A, Rho JM, Scheck AC, Salphati L, Heffron TP, Alicke B, Barck K, Carano RA, Cheong J, Greve J, Lee LB, Nishimura M, Pang J, Plise EG, Reslan HB, Zhang X, GOuld SG, Olivero AG, Phillips HS, Zadeh G, Jalali S, Voce D, Wei Z, Shijun K, Nikolai K, Josh W, Clayton C, Bakhtiar Y, Alkins R, Burgess A, Ganguly M, Wels W, Hynynen K, Li YM, Jun H, Daniel V, Walter HA, Nakashima H, Nguyen TT, Shalkh I, Goins WF, Chiocca EA, Pyko IV, Nakada M, Furuyama N, Lei T, Hayashi Y, Kawakami K, Minamoto T, Fedulau AS, Hamada JI. LAB-EXPERIMENTAL (PRE-CLINICAL) THERAPEUTICS AND PHARMACOLOGY. Neuro Oncol 2012; 14:vi25-vi37. [PMCID: PMC3488776 DOI: 10.1093/neuonc/nos222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2023] Open
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Hickey MJ, Malone CK, Erickson KL, Gerschenson LE, Lin AH, Inagaki A, Hiraoka K, Kasahara N, Mueller B, Kruse CA, Kong S, Tyler B, Zhou J, Carter BS, Brem H, Junghans RP, Sampath P, Lai RK, Recht LD, Reardon DA, Paleologos N, Groves M, Rosenfeld MR, Davis T, Green J, Heimberger A, Sampson J, Hashimoto N, Tsuboi A, Chiba Y, Kijima N, Oka Y, Kinoshita M, Kagawa N, Fujimoto Y, Sugiyama H, Yoshimine T, Birks SM, Burnet M, Pilkington GJ, Yu JS, Wheeler CJ, Rudnick J, Mazer M, Wang HQ, Nuno MA, Richardson JE, Fan X, Ji J, Chu RM, Bender JG, Hawkins EW, Black KL, Phuphanich S, Pollack IF, Jakacki RI, Butterfield LH, Okada H, Hunt MA, Pluhar GE, Andersen BM, Gallardo JL, Seiler CO, SantaCruz KS, Ohlfest JR, Bauer DF, Lamb LS, Harmon DK, Zheng X, Romeo AK, Gillespie GY, Parker JN, Markert JM, Jacobs VL, Landry RP, De Leo JA, Bromberg JE, Doorduijn J, Baars JW, van Imhoff GW, Enting R, van den Bent MJ, Murphy KA, Bedi J, Epstein A, Ohlfest JR, Olin M, Andersen B, Swier L, Ohlfest J, Litterman AJ, Zellmer DM, Ohlfest JR, Chiocca EA, Aguilar LK, Aguilar-Cordova E, Manzanera AG, Harney KR, Portnow J, Badie B, Lesniak M, Bell S, Ray-Chaudhuri A, Kaur B, Hardcastle J, Cavaliere R, McGregor J, Lo S, Chakarvarti A, Grecula J, Newton H, Trask TW, Baskin DS, New PZ, Zeng J, See AP, Phallen J, Belcaid Z, Durham N, Meyer C, Albesiano E, Pradilla G, Ford E, Hammers H, Tyler B, Brem H, Tran PT, Pardoll D, Drake CG, Lim M, Ghazi A, Ashoori A, Hanley P, Salsman V, Schaffer DR, Grada Z, Kew Y, Powell SZ, Grossman R, Scheurer ME, Leen AM, Rooney CM, Bollard CM, Heslop HE, Gottschalk S, Ahmed N, Hu J, Patil C, Nuno M, Wheeler C, Rudnick J, Phuphanich S, Mazer M, Wang HQ, Chu R, Black K, Yu J, Marabelle A, Kohrt H, Brody J, Luong R, Tse V, Levy R, Li YM, Jun H, Shahryar M, Daniel VA, Walter HA, Thaipisuttikul I, Avila E, Mitchell DA, Archer GE, Friedman HS, Herndon JE, Bigner DD, Sampson JH, Johnson LA, Archer GE, Nair SK, Schmittling R, Reap E, Sampson JH, Mitchell DA, Li YM, Shahryar M, Jun H, Daniel VA, Walter HA, Knisely JP, Kluger H, Flanigan J, Sznol M, Yu JB, Chiang VL, Prins RM, Kim W, Soto H, Lisiero DN, Lisiero DN, Liau LM. IMMUNOTHERAPY. Neuro Oncol 2011; 13:iii34-iii40. [PMCID: PMC3199174 DOI: 10.1093/neuonc/nor151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023] Open
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Feng L, Jun H, CAI B, LU N, DU L, MA L, Xu S, Zhang X, Xie C. Clinical observation in nasopharyngeal carcinoma (NPC) treated with the anti-EGFR monoclonal antibody followed by helical tomotherapy. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e16010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Ford EC, Achanta P, Purger D, Armour M, Reyes J, Fong J, Kleinberg L, Redmond K, Wong J, Jang MH, Jun H, Song HJ, Quinones-Hinojosa A. Localized CT-guided irradiation inhibits neurogenesis in specific regions of the adult mouse brain. Radiat Res 2011; 175:774-83. [PMID: 21449714 DOI: 10.1667/rr2214.1] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Radiation is used in the study of neurogenesis in the adult mouse both as a model for patients undergoing radiation therapy for CNS malignancies and as a tool to interrupt neurogenesis. We describe the use of a dedicated CT-guided precision device to irradiate specific sub-regions of the adult mouse brain. Improved CT visualization was accomplished with intrathecal injection of iodinated contrast agent, which enhances the lateral ventricles. T2-weighted MRI images were also used for target localization. Visualization of delivered beams (10 Gy) in tissue was accomplished with immunohistochemical staining for the protein γ-H2AX, a marker of DNA double-strand breaks. γ-H2AX stains showed that the lateral ventricle wall could be targeted with an accuracy of 0.19 mm (n = 10). In the hippocampus, γ-H2AX staining showed that the dentate gyrus can be irradiated unilaterally with a localized arc treatment. This resulted in a significant decrease of proliferative neural progenitor cells as measured by Ki-67 staining (P < 0.001) while leaving the contralateral side intact. Two months after localized irradiation, neurogenesis was significantly inhibited in the irradiated region as seen with EdU/NeuN double labeling (P < 0.001). Localized radiation in the rodent brain is a promising new tool for the study of neurogenesis.
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Affiliation(s)
- E C Ford
- Department of Radiation Oncology and Molecular Radiation Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21231, USA.
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Abstract
SYNOPSIS Although skin pigmentation, which results from the production and distribution of melanin in the epidermis, is the major physiological defence against solar irradiation, hyperpigmentation is a common and distressing problem caused by various inflammatory skin disorders, such as eczema, allergic contact dermatitis and irritant contact dermatitis. We evaluated the effects of a preparation containing alpha-bisabolol on pigmented skin of a group of subjects. The effectiveness of the active compound, alpha-bisabolol, in a base-cream preparation for the treatment of pigmented skin was tested on 28 female subjects as follows: the cream was applied once a day to the back for 8 weeks. These same women also applied a vehicle control cream to the pigmented skin. The results were evaluated by clinical and biophysical test methods. After 8 weeks of treatment of the alpha-bisabolol-containing cream, there was significant lightening effect in the pigmented skin for the majority of the subjects who tested the cream.
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Affiliation(s)
- J Lee
- Biospectrum Life Science Institute, Gyunggi Do, Suwon, Korea
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Qiuhang Z, Zhenlin W, Yan Q, Jun H, Yongfeng S, Bo H. Lymphatic drainage of the skull base: comparative anatomic and advanced imaging studies in the rabbit and human with implications for spread of nasopharyngeal carcinoma. Lymphology 2010; 43:98-109. [PMID: 21226412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
This preliminary study investigated the lymphatic drainage and distribution of lymphatic structures in the skull base. Characteristics of the rabbit skull base were analyzed and compared correspondingly with those of the human skull. The lymphatic circulation in the rabbit cranial base was detected by digital subtraction angiography (DSA), and lymph drainage in the human skull base was illustrated by interstitial magnetic resonance lymphography (MRL). Lymphatic structures and their distribution in MRL were identified by comparing with contrast-enhanced MRI and clinical data on basilar metastasis of nasopharyngeal carcinoma (NPC) in the human skull base. Anatomic similarity was found between the rabbit and human basilar regions. Well-visualized lymphatic pathways were found in the rabbit cranial base, and human lymphatic structures showed high signal intensity in enhanced T1-weighted MRL images. Lymphatic tissues in the human basilar region were found mainly distributed in the areas of the jugular foramen, foramen lacerum, and petrosal section of the internal carotid artery (ICA). Their distribution in the human basilar region was similar to the distribution in the rabbit basilar region and consistent with our clinical findings of the predilection sites of NPC metastasis in the skull base. Our studies show that bilateral symmetrical lymphatic structures were distributed along the ICA, internal jugular vein, and dura of cranial base in the central part of the middle and posterior skull base.
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Affiliation(s)
- Z Qiuhang
- Center of Skull Base Surgery, China INN and Department of Otolaryngology-Head and Neck Surgery, Xuanwu Hospital, Capital Medical University, Beijing, Peoples Republic of China.
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Kim H, Pak G, Jun H, Kim S, Yoon J. Distributed modelling of urban runoff using a meta-channel concept. Water Sci Technol 2010; 61:2707-2715. [PMID: 20489242 DOI: 10.2166/wst.2010.187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Hydraulic flood routing is advantageous for computational accuracy; however, it requires individual calculations of an extensive pipe network in the case of a two-dimensional analysis. In this study, a method for considering the characteristics of a two-dimensional pipe network has been developed using the meta-channel concept to simplify the detailed calculations involved in the estimation of runoff from urban catchments. In essence, the meta-channel concept turns a two-dimensional pipe network into a one-dimensional pipe with an effective hydraulic geometry. Once such geometry has been identified, the flood routing can then be performed for an urban drainage system. A nonlinear diffusion wave equation, derived from the Saint-Venant equation, was used for flood routing, with an explicit method used for the numerical solution. The celerity and diffusion coefficients, which are two parameters of the diffusion wave equation, were estimated for the Goonja drainage from a two-dimensional pipe network using the meta-channel concept. A comparison of the results of the meta-channel-based pipe routing with the distributed SWMM simulation and observed data, showed close similarities, and identified the applicability of the meta-channel concept in an urban drainage setting.
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Affiliation(s)
- H Kim
- Department of Environmental Engineering, Korea University, Jochiwon Chungnam 339-700, South Korea
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Jun H, Chang M, Ko Y, Ahn Y, Jeong H, Son Y, Baek J, Park Y, Park K, Ahn M. Clinical significance of type 1 insulin-like growth factor receptor and insulin-like growth factor binding protein-3 expression in squamous cell carcinoma of head and neck. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.6036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
6036 Background: Type 1 insulin-like growth factor receptor (IGF-1R) plays an important role in the growth and apoptosis of cancer cell. The activities of IGF-1R are modulated by a family of high-affinity insulin-like growth factor binding proteins (IGFBPs), of which IGFBP-3 is the major serum carrier protein. The expression and significance of IGF-1R and IGFBP-3 in squamous cell carcinoma of the head and neck (SCCHN) is unknown. Methods: This study explored immunohistochemical expression of IGF-1R and IGFBP-3 in tumor samples from 131 patients with surgically resected SCCHN. Results: The positive expression of IGF-1R and IGFBP-3 was observed in 96 (73.3%) and 117 (89.3%) patients. There were no significant differences in baseline characteristics between the positive and negative expressed groups of IGF-1R and IGFBP-3. With the median follow up of 53.5 months, 3 year progression free (PFS) and overall (OS) survival rate was 64.0% and 72.9%, neither IGF-1R nor IGFBP-3 expression had prognostic values in the whole cohort. Thirty-seven (67.3%) of 55 stage IV patients demonstrated IGF-1R positivity. The subgroup analysis of in stage IV patients showed the poor PFS ( = 0.029) and OS (pp = 0.025) in IGF-1R positive groups. In a multivariate analysis using IGF-1R expression and other clinicopathological parameters, the IGF-1R expression was remained as an independent factor for PFS (p = 0.037, HR = 2.816, 95% C.I. 1.065 - 7.446) and OS (p = 0.034, HR = 3.169, 95% C.I. 1.089 - 9.225). Conclusions: Our work exhibited that IGF-1R expression is frequent in SCCHN patients and related with poor survival in advanced stage, this could support the attempts using the IGF-1R inhibitor for treatment of SCCHN. No significant financial relationships to disclose.
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Affiliation(s)
- H. Jun
- Samsung Medical Center, Seoul, Republic of Korea
| | - M. Chang
- Samsung Medical Center, Seoul, Republic of Korea
| | - Y. Ko
- Samsung Medical Center, Seoul, Republic of Korea
| | - Y. Ahn
- Samsung Medical Center, Seoul, Republic of Korea
| | - H. Jeong
- Samsung Medical Center, Seoul, Republic of Korea
| | - Y. Son
- Samsung Medical Center, Seoul, Republic of Korea
| | - J. Baek
- Samsung Medical Center, Seoul, Republic of Korea
| | - Y. Park
- Samsung Medical Center, Seoul, Republic of Korea
| | - K. Park
- Samsung Medical Center, Seoul, Republic of Korea
| | - M. Ahn
- Samsung Medical Center, Seoul, Republic of Korea
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Nishio K, Kentaro K, Sang-Woo K, Tsunehiro M, Takashi Y, Jun H, Shigeo M, Keiji T, Yukio M. The crystallographic study of the deubiquitinating enzyme UCH37 N-terminal domain. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308091101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Kim H, Yi S, Jun H, Ha HI, Hwang I, Jung C, Kim W, Lim H. Use of biomakers to predict outcomes of immunotherapy for metastatic renal cell carcinoma. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.16015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Yi S, Uhm J, Cho E, Lee S, Park M, Jun H, Park Y, Ahn J, Im Y, Kang W, Park K. Clinical outcomes of metastatic breast cancer patients with triple-negative phenotype who received platinum-containing chemotherapy. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.1008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Jun H, Ahn M, Kim H, Park B, Han J, Ahn Y, Jeong H, Son Y, Baek J, Park K. Clinical significance of ERCC1 expression in advanced squamous cell carcinoma of the head and neck treated with cisplatin- based concurrent chemoradiation. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.6061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
6061 Background: The cytotoxic effect of cisplatin is based on the DNA cross linking. Nucleotide excision repair is associated with resistant to platinum-based chemotherapy. The excision repair cross-complementation group 1 (ERCC1) enzyme plays a rate-limiting role in nucleotide excision repair pathway. We evaluated the expression of ERCC1 as a predictive factor for survival in patients of squamous cell carcinoma of the head and neck (SCCHN) treated with cisplatin-based concurrent chemoradiotherapy (CCRT). Methods: We reviewed the clinical records and pathologic specimens of locally advanced SCCHN patients who had been treated with cisplatin-based definitive CCRT between 1995 and 2005. ERCC1 expression of the biopsy specimen was assessed by immunohistochemical (IHC) staining and a semi- quantitative grading system (H-score) was used for the evaluation. The median value of the H-score was chosen as the cutoff point for positive ERCC1 expression. Results: A total of 44 specimens and clinical data of the patients were reviewed. The median age was 59 years (range; 27–75), and 81.8% were male; 94.2% had ECOG performance status 0–1. The positive ERCC1 expression rate was 54.5% of all specimens (N=24/44). Overall tumor response rate for CCRT was 90.9% (CR=65.9%; PR=25.0%). With a median follow-up of 45.9 months (range; 5.4–133.0), 5-year progression free survival (PFS) rate was 58.0% and 5-year overall survival (OS) rate was 57.2%. Patients in group of positive ERCC1 expression showed poor survival in terms of PFS and OS (p=0.04; p=0.05), compared with negative ERCC1 expression group. Conclusions: The positive ERCC1 expression might be a predictive factor for poor survival and early progression in patients with locally advanced SCCHN treated with cisplatin-based CCRT. No significant financial relationships to disclose.
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Affiliation(s)
- H. Jun
- Samsung Medical Center Sungkyunkwan Uni Sch Med, Seoul, Republic of Korea
| | - M. Ahn
- Samsung Medical Center Sungkyunkwan Uni Sch Med, Seoul, Republic of Korea
| | - H. Kim
- Samsung Medical Center Sungkyunkwan Uni Sch Med, Seoul, Republic of Korea
| | - B. Park
- Samsung Medical Center Sungkyunkwan Uni Sch Med, Seoul, Republic of Korea
| | - J. Han
- Samsung Medical Center Sungkyunkwan Uni Sch Med, Seoul, Republic of Korea
| | - Y. Ahn
- Samsung Medical Center Sungkyunkwan Uni Sch Med, Seoul, Republic of Korea
| | - H. Jeong
- Samsung Medical Center Sungkyunkwan Uni Sch Med, Seoul, Republic of Korea
| | - Y. Son
- Samsung Medical Center Sungkyunkwan Uni Sch Med, Seoul, Republic of Korea
| | - J. Baek
- Samsung Medical Center Sungkyunkwan Uni Sch Med, Seoul, Republic of Korea
| | - K. Park
- Samsung Medical Center Sungkyunkwan Uni Sch Med, Seoul, Republic of Korea
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Jingchun L, Chongling Y, Macnair MR, Jun H, Yuhong L. Distribution and speciation of some metals in mangrove sediments from Jiulong river estuary, People's Republic of China. Bull Environ Contam Toxicol 2006; 76:815-22. [PMID: 16786452 DOI: 10.1007/s00128-006-0992-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2005] [Accepted: 03/15/2006] [Indexed: 05/10/2023]
Affiliation(s)
- L Jingchun
- School of Life Sciences, Xiamen University, People's Republic of China, Fujian
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Lee S, Jun H, Cho S, Park J, Choi D, Cha K. Accumulation of mitochondrial DNA deletion (ΔmtDNA4977) showing tissue-specific and age-related variation. Fertil Steril 2001. [DOI: 10.1016/s0015-0282(01)02612-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Yoo SD, Jun H, Shin BS, Lee HS, Park MO, Deluca PP, Lee KC. Pharmacokinetic disposition of polyethylene glycol-modified salmon calcitonins in rats. Chem Pharm Bull (Tokyo) 2000; 48:1921-4. [PMID: 11145145 DOI: 10.1248/cpb.48.1921] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study first reports the pharmacokinetic disposition of polyethylene glycol (PEG)-modified salmon calcitonin (sCT) based on the number of attached PEG molecules. PEG-modified sCT was prepared by covalent linkage with succinimidyl carbonate monomethoxy polyethylene glycol. Mono- and di-PEG-sCTs were separated by size exclusion and reverse phase HPLC, and radioiodinated by the chloramine-T method with Na125I. 125I-mono-PEG sCT, 125I-di-PEG-sCT and unmodified 125I-sCT were administered to rats by i.v. injection. Serial blood samples, urine and various tissue samples were taken for the determination of radioactivity. Di-PEG-sCT exhibited significantly reduced systemic clearance (2.3 vs. 11.1 ml/min/kg) and steady-state volume of distribution (229.9 vs. 603.1 ml/kg), while mono-PEG-sCT showed a prolonged elimination half-life (189.1 min vs. 59.8 min) compared with unmodified sCT. The extent of urinary excretion of the PEG-modified sCTs was higher than for the unmodified sCT, but all these chemicals were excreted in urine in small quantities (< or = 0.6%). There was a tendency toward reduced accumulation of PEGylated sCTs in tissues, with its reduction being inversely proportional to the molecular size. Accumulation of the total radioactivity of the unmodified and PEG-modified sCTs was highest in the liver, followed by kidneys, lungs, spleen, heart and thyroid. When expressed per tissue gram weight, however, the highest radioactivity was found in the kidneys. PEGylated sCTs may have greater therapeutic potential via reduced systemic clearance and prolonged elimination half-life over unmodified sCT.
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Affiliation(s)
- S D Yoo
- College of Pharmacy, Sungkyunkwan University, Suwon, Kyonggi-do, Korea.
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Abstract
This study examined the pharmacokinetic disposition, oral absorption and hepatic extraction of itraconazole and its active metabolite, hydroxyitraconazole, in rats. After i.v. injection, serum itraconazole concentrations decreased biexponentially, with an average terminal elimination half-life, volume of distribution and systemic clearance of 4.9 h, 6.0 l/kg and 14.2 ml/min/kg, respectively. When given orally, its absorption was low, with a mean absolute bioavailability of 16.6%. The metabolite to parent drug area under the curve (AUC) ratio was higher after oral administration compared with i.v. injection (mean ratio, 2.7 vs. 0.9). The hepatic drug extraction ratio determined after femoral and portal vein administration averaged 18.5%. When hydroxyitraconazole was injected i.v., the elimination half-life, volume of distribution and systemic clearance of itraconazole averaged 10.0 h, 2.4 l/kg and 3.4 ml/min/kg, respectively. The fraction of the systemically available itraconazole that was metabolized to hydroxyitraconazole was 21.0% and 76.0% after i.v. and oral administration, respectively. In summary, this study is the first reporting the hepatic extraction of itraconazole and the i.v. disposition characteristics of hydroxyitraconazole in rats. Itraconazole is a drug with a low hepatic extraction ratio and its systemic clearance appears to be largely accounted for by hepatic metabolism.
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Affiliation(s)
- S D Yoo
- College of Pharmacy, Sungkyunkwan University, Suwon, Kyunggi-do, Korea.
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Jun H, Haruyama AZ, Chang KS, Yamamoto LG. Comparison of a new screw-tipped intraosseous needle versus a standard bone marrow aspiration needle for infusion. Am J Emerg Med 2000; 18:135-9. [PMID: 10750915 DOI: 10.1016/s0735-6757(00)90003-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The purpose of this study is to compare the speed and ease of establishing intraosseous infusion using a standard bone marrow needle (SBMN; $8) and a new screw-tipped intraosseous needle (Sur-Fast; $42). The study is an experimental design. A total of 42 medical students, without prior IO experience, were recruited as study subjects. Subjects were randomized to perform the IO procedures in one of two models: (1) turkey femur or (2) pork ribs. Each subject performed an initial trial using both IO needles without practice (inexperienced) and a second trial using both IO needles after practice (experienced attempt), such that in total, each subject completed four attempts (two with each needle type). IO placement times were measured, and placement difficulty scores were measured using a 10 cm visual analog scale (VAS). The averaged elapsed time to successful IO completion was significantly shorter for the SBMN in the initial "inexperienced" attempt (33 versus 54 seconds, P = .019), but there was no significant difference in the postpractice "experienced" attempt. VAS difficulty scores were lower (easier) for the SBMN for both inexperienced and experienced trials. Success rates were significantly higher for the Sur-Fast needle during the experienced attempt (95% versus 79%, P < .05), but there was no significant difference in success rates during the inexperienced attempt. The Sur-Fast screw-tipped intraosseous needle does not show superiority over the SBMN in this intraosseous model, therefore its higher cost is difficult to justify based on this study.
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Affiliation(s)
- H Jun
- Department of Pediatrics, University of Hawaii, John A. Burns School of Medicine, Honolulu, USA
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Yoo SD, Lee SH, Kang E, Jun H, Jung JY, Park JW, Lee KH. Bioavailability of itraconazole in rats and rabbits after administration of tablets containing solid dispersion particles. Drug Dev Ind Pharm 2000; 26:27-34. [PMID: 10677807 DOI: 10.1081/ddc-100100324] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
A tablet dosage form containing solid dispersions of itraconazole (Asd tablets) was prepared by using the spray-drying and wet granulation methods. The dissolution rate of itraconazole from Asd tablets was fast, with more than 90% released within 10 min, compared to less than 20% for a marketed product, Sporanox capsules. The oral absorption of itraconazole from Asd tablets was determined in rats and rabbits and was compared with that for Sporanox capsules. In the rat, there was no difference between the Asd tablets and Sporanox capsules in the mean area under the curve (AUC) (3089.5 +/- 4332.8 ng.hr/ml and 3653.9 +/- 2348.9 ng.hr/ml, respectively) and Cmax (295.0 +/- 344.5 and 390.5 +/- 169.4 ng/ml, respectively). Also, in the rabbit, no difference was found between the two products in the mean AUC (AUMC; 19357.9 +/- 5117.5 ng.hr/ml and 23382.2 +/- 6236.5 ng.hr/ml, respectively) and Cmax (766.4 +/- 276.5 and 1127.5 +/- 577.9 ng/ml, respectively). Despite the rapid in vitro release characteristics of itraconazole from the Asd tablets, the in vivo absorption of itraconazole was comparable to that of Sporanox capsules, with no difference in Tmax in both animal species. Serum levels of the major active metabolite hydroxyitraconazole were also measured. Itraconazole was rapidly converted to hydroxyitraconazole in both rats and rabbits, but there were species-specific differences in their pharmacokinetics. It is concluded that, in addition to drug solubility and dissolution characteristics, other formulation factors such as the physical state of the drug and the granulation process, may also need to be considered in the prediction of the in vivo absorption of itraconazole based on in vitro data.
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Affiliation(s)
- S D Yoo
- College of Pharmacy, Sungkyunkwan University, Kyunggi-do, Korea.
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Christophersen AG, Jun H, Jørgensen K, Skibsted LH. Photobleaching of astaxanthin and canthaxanthin. Quantum-yields dependence of solvent, temperature, and wavelength of irradiation in relation to packaging and storage of carotenoid pigmented salmonoids. Z Lebensm Unters Forsch 1991; 192:433-9. [PMID: 1905450 DOI: 10.1007/bf01193143] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The quantum yield for the photobleaching of astaxanthin (the carotenoid of wild salmonoids) and of canthaxanthin (the closely related carotenoid used as a feeding additive for farmed salmonoids) has been determined for monochromatic light at different wavelengths and in different solvents. Astaxanthin is less sensitive to light than canthaxanthin. The photobleaching is strongly wavelength dependent, and the quantum yield for astaxanthin dissolved in chloroform at 22 degrees C is 3.2 x 10(-1) mol.Einstein-1 at 254 nm, 3.1 x 10(-2) at 313 nm, and 1.6 x 10(-6) at 436 nm, respectively. The quantum yields are less dependent on the nature of the solvent and show no simple correlation with oxygen solubility, i.e. for 366 nm excitation of astaxanthin the quantum yields are 6.1 x 10(-5) mol.Einstein-1 in acetone, 1.2 x 10(-4) in saturated vegetable oil, 1.9 x 10(-4) in chloroform, and 3.4 x 10(-4) solubilized in water, respectively. The photobleaching quantum yield provides an objective measure of the light sensitivity of the carotenoids in relation to the discolouration of carotenoid-pigmented salmonoids. The quantum yield was also found to be independent of the carotenoid concentration and, in a homogenous solution, of light intensities. For astaxanthin solubilized in water, the quantum yield increases for low light intensities. Excitation of astaxanthin solubilized in water using visible light shows that the photobleaching quantum yield is independent of temperature, while excitation at 313 nm shows an increase in the quantum yield with increasing temperatures, corresponding to an energy of activation of 28 kJ.mol-1.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- A G Christophersen
- Chemistry Department, Royal Veterinary and Agricultural University, Frederiksberg C, Denmark
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