1
|
Van San E, Debruyne AC, Veeckmans G, Tyurina YY, Tyurin VA, Zheng H, Choi SM, Augustyns K, van Loo G, Michalke B, Venkataramani V, Toyokuni S, Bayir H, Vandenabeele P, Hassannia B, Vanden Berghe T. Ferroptosis contributes to multiple sclerosis and its pharmacological targeting suppresses experimental disease progression. Cell Death Differ 2023; 30:2092-2103. [PMID: 37542104 PMCID: PMC10482919 DOI: 10.1038/s41418-023-01195-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 07/03/2023] [Accepted: 07/14/2023] [Indexed: 08/06/2023] Open
Abstract
Multiple sclerosis (MS) is a chronic autoimmune disorder characterized by central nervous (CNS) demyelination resulting in axonal injury and neurological deficits. Essentially, MS is driven by an auto-amplifying mechanism of inflammation and cell death. Current therapies mainly focus on disease modification by immunosuppression, while no treatment specifically focuses on controlling cell death injury. Here, we report that ferroptosis, an iron-catalyzed mode of regulated cell death (RCD), contributes to MS disease progression. Active and chronic MS lesions and cerebrospinal fluid (CSF) of MS patients revealed several signs of ferroptosis, reflected by the presence of elevated levels of (labile) iron, peroxidized phospholipids and lipid degradation products. Treatment with our candidate lead ferroptosis inhibitor, UAMC-3203, strongly delays relapse and ameliorates disease progression in a preclinical model of relapsing-remitting MS. In conclusion, the results identify ferroptosis as a detrimental and targetable factor in MS. These findings create novel treatment options for MS patients, along with current immunosuppressive strategies.
Collapse
Grants
- R01 NS076511 NINDS NIH HHS
- Research Foundation Flanders, G.0C76.18N, G.0B7.18N, G.0B96.20N, G049720N, G.0A93.22N (TVB, PV); Excellence of Science MODEL-IDI and CD-INFLADIS (TVB, PV, KA); Consortium of excellence at University of Antwerp INFLA-MED (KA, TVB); Industrial Research Fund (KA, TVB) and BOF-IMPULS from University of Antwerp (TVB); Foundation against cancer FAF-C/2018/1250 and F/2022/2067 (TVB); Charcot Foundation (EVS, TVB, PV); VLIRUOS TEAM2018-01-137 (TVB, PV); Research Foundation Flanders G0E0416N, G0C7618N, G0B718N, G.0B9620N (PV); FWO-SBO S001522N (TVB, KA); Flemish Institute of Biotechnology VIB (PV, TVB); Methusalem BOF16/MET_V/007 (PV); iBOF ATLANTIS grant 20/IBF/039 (PV); CRIG and GIGG consortia (PV); NIH NS076511 (HB).
Collapse
Affiliation(s)
- Emily Van San
- Department of Biomedical Molecular Biology, Ghent university, Ghent, Belgium
- VIB-UGent Center for Inflammation Research, Ghent, Belgium
| | - Angela C Debruyne
- Department of Human Structure and Repair, Ghent University, Ghent, Belgium
| | | | - Yulia Y Tyurina
- Department of Environmental Health and Occupational Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Vladimir A Tyurin
- Department of Environmental Health and Occupational Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Hao Zheng
- Department of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Sze Men Choi
- Department of Biomedical Molecular Biology, Ghent university, Ghent, Belgium
- VIB-UGent Center for Inflammation Research, Ghent, Belgium
| | - Koen Augustyns
- Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Geert van Loo
- Department of Biomedical Molecular Biology, Ghent university, Ghent, Belgium
- VIB-UGent Center for Inflammation Research, Ghent, Belgium
| | - Bernhard Michalke
- Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, Munich, Germany
| | | | - Shinya Toyokuni
- Department of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Nagoya, Japan
- Center for Low-temperature Plasma Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, Japan
| | - Hülya Bayir
- Department of Environmental Health and Occupational Health, University of Pittsburgh, Pittsburgh, PA, USA
- Children's Neuroscience Institute, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA, USA
| | - Peter Vandenabeele
- Department of Biomedical Molecular Biology, Ghent university, Ghent, Belgium
- VIB-UGent Center for Inflammation Research, Ghent, Belgium
- Methusalem program, Ghent University, Ghent, Belgium
| | - Behrouz Hassannia
- Department of Biomedical Molecular Biology, Ghent university, Ghent, Belgium
- VIB-UGent Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Tom Vanden Berghe
- Department of Biomedical Molecular Biology, Ghent university, Ghent, Belgium.
- VIB-UGent Center for Inflammation Research, Ghent, Belgium.
- Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium.
| |
Collapse
|
2
|
Peleman C, Van Coillie S, Ligthart S, Choi SM, De Waele J, Depuydt P, Benoit D, Schaubroeck H, Francque SM, Dams K, Jacobs R, Robert D, Roelandt R, Seurinck R, Saeys Y, Rajapurkar M, Jorens PG, Hoste E, Vanden Berghe T. Ferroptosis and pyroptosis signatures in critical COVID-19 patients. Cell Death Differ 2023; 30:2066-2077. [PMID: 37582864 PMCID: PMC10482958 DOI: 10.1038/s41418-023-01204-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 07/26/2023] [Accepted: 08/04/2023] [Indexed: 08/17/2023] Open
Abstract
Critical COVID-19 patients admitted to the intensive care unit (ICU) frequently suffer from severe multiple organ dysfunction with underlying widespread cell death. Ferroptosis and pyroptosis are two detrimental forms of regulated cell death that could constitute new therapeutic targets. We enrolled 120 critical COVID-19 patients in a two-center prospective cohort study to monitor systemic markers of ferroptosis, iron dyshomeostasis, pyroptosis, pneumocyte cell death and cell damage on the first three consecutive days after ICU admission. Plasma of 20 post-operative ICU patients (PO) and 39 healthy controls (HC) without organ failure served as controls. Subsets of COVID-19 patients displayed increases in individual biomarkers compared to controls. Unsupervised clustering was used to discern latent clusters of COVID-19 patients based on biomarker profiles. Pyroptosis-related interleukin-18 accompanied by high pneumocyte cell death was independently associated with higher odds at mechanical ventilation, while the subgroup with high interleuking-1 beta (but limited pneumocyte cell death) displayed reduced odds at mechanical ventilation and lower mortality hazard. Meanwhile, iron dyshomeostasis with a tendency towards higher ferroptosis marker malondialdehyde had no association with outcome, except for the small subset of patients with very high catalytic iron independently associated with reduced survival. Forty percent of patients did not have a clear signature of the cell death mechanisms studied in this cohort. Moreover, repeated moderate levels of soluble receptor of advanced glycation end products and growth differentiation factor 15 during the first three days after ICU admission are independently associated with adverse clinical outcome compared to sustained lower levels. Altogether, the data point towards distinct subgroups in this cohort of critical COVID-19 patients with different systemic signatures of pyroptosis, iron dyshomeostasis, ferroptosis or pneumocyte cell death markers that have different outcomes in ICU. The distinct groups may allow 'personalized' treatment allocation in critical COVID-19 based on systemic biomarker profiles.
Collapse
Affiliation(s)
- Cédric Peleman
- Laboratory of Experimental Medicine and Paediatrics, Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium
- Department of Gastroenterology and Hepatology, Antwerp University Hospital, Edegem, Belgium
| | - Samya Van Coillie
- VIB-UGent Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Symen Ligthart
- Laboratory of Experimental Medicine and Paediatrics, Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium
- Division of Intensive Care, Medicine, Antwerp University Hospital, Edegem, Belgium
| | - Sze Men Choi
- VIB-UGent Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Jan De Waele
- Intensive Care Unit, Department of Internal Medicine and Pediatrics, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Pieter Depuydt
- Intensive Care Unit, Department of Internal Medicine and Pediatrics, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Dominique Benoit
- Intensive Care Unit, Department of Internal Medicine and Pediatrics, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Hannah Schaubroeck
- Intensive Care Unit, Department of Internal Medicine and Pediatrics, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Sven M Francque
- Laboratory of Experimental Medicine and Paediatrics, Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium
- Department of Gastroenterology and Hepatology, Antwerp University Hospital, Edegem, Belgium
| | - Karolien Dams
- Laboratory of Experimental Medicine and Paediatrics, Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium
- Division of Intensive Care, Medicine, Antwerp University Hospital, Edegem, Belgium
| | - Rita Jacobs
- Laboratory of Experimental Medicine and Paediatrics, Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium
- Division of Intensive Care, Medicine, Antwerp University Hospital, Edegem, Belgium
| | - Dominique Robert
- Laboratory of Experimental Medicine and Paediatrics, Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium
- Division of Intensive Care, Medicine, Antwerp University Hospital, Edegem, Belgium
| | - Ria Roelandt
- VIB-UGent Center for Inflammation Research, Ghent, Belgium
- Department of Applied Mathematics, Computer Science and Statistics, Ghent University, Ghent, Belgium
| | - Ruth Seurinck
- VIB-UGent Center for Inflammation Research, Ghent, Belgium
- Department of Applied Mathematics, Computer Science and Statistics, Ghent University, Ghent, Belgium
| | - Yvan Saeys
- VIB-UGent Center for Inflammation Research, Ghent, Belgium
- Department of Applied Mathematics, Computer Science and Statistics, Ghent University, Ghent, Belgium
| | - Mohan Rajapurkar
- Department of Nephrology, Muljibhai Patel Society for Research in Nephro-Urology, Nadiad, India
| | - Philippe G Jorens
- Laboratory of Experimental Medicine and Paediatrics, Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium
- Division of Intensive Care, Medicine, Antwerp University Hospital, Edegem, Belgium
| | - Eric Hoste
- Intensive Care Unit, Department of Internal Medicine and Pediatrics, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Tom Vanden Berghe
- VIB-UGent Center for Inflammation Research, Ghent, Belgium.
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium.
- Laboratory of Pathophysiology, Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium.
| |
Collapse
|
3
|
Van Coillie S, Van San E, Goetschalckx I, Wiernicki B, Mukhopadhyay B, Tonnus W, Choi SM, Roelandt R, Dumitrascu C, Lamberts L, Dams G, Weyts W, Huysentruyt J, Hassannia B, Ingold I, Lele S, Meyer E, Berg M, Seurinck R, Saeys Y, Vermeulen A, van Nuijs ALN, Conrad M, Linkermann A, Rajapurkar M, Vandenabeele P, Hoste E, Augustyns K, Vanden Berghe T. Targeting ferroptosis protects against experimental (multi)organ dysfunction and death. Nat Commun 2022; 13:1046. [PMID: 35210435 PMCID: PMC8873468 DOI: 10.1038/s41467-022-28718-6] [Citation(s) in RCA: 56] [Impact Index Per Article: 28.0] [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: 04/15/2021] [Accepted: 02/07/2022] [Indexed: 12/26/2022] Open
Abstract
The most common cause of death in the intensive care unit (ICU) is the development of multiorgan dysfunction syndrome (MODS). Besides life-supporting treatments, no cure exists, and its mechanisms are still poorly understood. Catalytic iron is associated with ICU mortality and is known to cause free radical-mediated cellular toxicity. It is thought to induce excessive lipid peroxidation, the main characteristic of an iron-dependent type of cell death conceptualized as ferroptosis. Here we show that the severity of multiorgan dysfunction and the probability of death are indeed associated with plasma catalytic iron and lipid peroxidation. Transgenic approaches underscore the role of ferroptosis in iron-induced multiorgan dysfunction. Blocking lipid peroxidation with our highly soluble ferrostatin-analogue protects mice from injury and death in experimental non-septic multiorgan dysfunction, but not in sepsis-induced multiorgan dysfunction. The limitations of the experimental mice models to mimic the complexity of clinical MODS warrant further preclinical testing. In conclusion, our data suggest ferroptosis targeting as possible treatment option for a stratifiable subset of MODS patients.
Collapse
Affiliation(s)
- Samya Van Coillie
- VIB-UGent Center for Inflammation Research, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Emily Van San
- VIB-UGent Center for Inflammation Research, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Ines Goetschalckx
- Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Bartosz Wiernicki
- VIB-UGent Center for Inflammation Research, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Banibrata Mukhopadhyay
- Department of Nephrology, Muljibhai Patel Society for Research in Nephro-Urology, Nadiad, India
| | - Wulf Tonnus
- Department of Internal Medicine 3, University Hospital Carl Gustav Carus, the Technische Universität Dresden, Dresden, Germany
| | - Sze Men Choi
- VIB-UGent Center for Inflammation Research, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Ria Roelandt
- VIB-UGent Center for Inflammation Research, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium.,Department of Applied Mathematics, Computer Science and Statistics, Ghent University, Ghent, Belgium
| | - Catalina Dumitrascu
- Department of Pharmaceutical Sciences, Toxicological Centre, University of Antwerp, Antwerp, Belgium
| | - Ludwig Lamberts
- Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Geert Dams
- Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Wannes Weyts
- VIB-UGent Center for Medical Biotechnology, Ghent, Belgium
| | - Jelle Huysentruyt
- VIB-UGent Center for Inflammation Research, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Behrouz Hassannia
- VIB-UGent Center for Inflammation Research, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Irina Ingold
- Institute of Metabolism and Cell Death, Helmholtz Zentrum München, German Research Center for Environmental Health, Munich, Germany.,Department of Medicine III, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Suhas Lele
- Department of Nephrology, Muljibhai Patel Society for Research in Nephro-Urology, Nadiad, India
| | - Evelyne Meyer
- Department of Pharmacology, Toxicology and Biochemistry, Ghent University, Merelbeke, Belgium
| | - Maya Berg
- Department of Pharmaceutical Sciences, Toxicological Centre, University of Antwerp, Antwerp, Belgium
| | - Ruth Seurinck
- VIB-UGent Center for Inflammation Research, Ghent, Belgium.,Department of Applied Mathematics, Computer Science and Statistics, Ghent University, Ghent, Belgium
| | - Yvan Saeys
- VIB-UGent Center for Inflammation Research, Ghent, Belgium.,Department of Applied Mathematics, Computer Science and Statistics, Ghent University, Ghent, Belgium
| | - An Vermeulen
- Department of Bioanalysis, Ghent University, Ghent, Belgium
| | - Alexander L N van Nuijs
- Department of Pharmaceutical Sciences, Toxicological Centre, University of Antwerp, Antwerp, Belgium
| | - Marcus Conrad
- Institute of Metabolism and Cell Death, Helmholtz Zentrum München, German Research Center for Environmental Health, Munich, Germany.,National Research Medical University, Laboratory of Experimental Oncology, Moscow, Russia
| | - Andreas Linkermann
- Department of Internal Medicine 3, University Hospital Carl Gustav Carus, the Technische Universität Dresden, Dresden, Germany.,Biotechnology Center, Technische Universität Dresden, Dresden, Germany
| | - Mohan Rajapurkar
- Department of Nephrology, Muljibhai Patel Society for Research in Nephro-Urology, Nadiad, India
| | - Peter Vandenabeele
- VIB-UGent Center for Inflammation Research, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium.,Methusalem program, Ghent University, Ghent, Belgium
| | - Eric Hoste
- Intensive Care Unit, Ghent University Hospital; Ghent University, Ghent, Belgium
| | - Koen Augustyns
- Department of Pharmaceutical Sciences, Toxicological Centre, University of Antwerp, Antwerp, Belgium
| | - Tom Vanden Berghe
- VIB-UGent Center for Inflammation Research, Ghent, Belgium. .,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium. .,Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium.
| |
Collapse
|
4
|
Choi SM, Ooi SZY, Carpenter EC. 1167 A Cross-Sectional Study of Undergraduate Exposure and Teaching of Trauma and Orthopaedics in The UK. Br J Surg 2021. [DOI: 10.1093/bjs/znab259.896] [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: 11/14/2022]
Abstract
Abstract
Aim
Research has shown exposure to specialities as a medical student can have a great influence in choice of career. Exposure to potential mentors during this time also has an additive effect on career shaping of medical students. It is important to encourage interest in trauma and orthopaedics (T&O) to ensure the best candidates are selected. Our aim was to establish the compulsory duration of T&O teaching provided by all (non-new) medical schools. This study also aims to identify which other specialities were taught alongside T&O.
Method
Surveys were distributed to medical students in all 33 (non-new) medical schools, through surgical societies and colleagues met through courses, between June 2019- February 2020. The survey asked the total length of compulsory teaching of T&O in days, and how this was divided into pre-clinical or clinical teaching.
Results
Data for all 33 UK medical schools were collected. Only 7 medical schools taught T&O as a standalone subject. The other 26 medical schools combined T&O with other specialities, most commonly with Rheumatology (n = 16). The average total length of days of T&O teaching across medical school was 17 days (range 3-60). Majority of this teaching was given in the clinical years of medical school (n = 30).
Conclusions
Research has shown medical students require enough exposure to increase their interest in pursuing a particular speciality. Currently there is a huge variance on the number of compulsory teaching days for T&O.
Collapse
Affiliation(s)
- S M Choi
- University Hospital of Wales, Cardiff, United Kingdom
| | - S Z Y Ooi
- Cardiff University School of Medicine, Cardiff, United Kingdom
| | - E C Carpenter
- University Hospital of Wales, Cardiff, United Kingdom
| |
Collapse
|
5
|
Choi SM, Kumar R, Morgan-Jones R, Agarwal S. 1064 Extra-Articular Tibial Deformity Management in Total Knee Replacement. Br J Surg 2021. [DOI: 10.1093/bjs/znab259.1023] [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: 11/13/2022]
Abstract
Abstract
Aim
In knee replacements, restoration of mechanical alignment is essential. Patients with extra-articular deformities (EAD) pose challenges in planning knee replacements. We present a method, based on our experience and review of literature on planning knee replacement surgery, in the presence of extra-articular coronal plane deformity of the tibia.
Method
Retrospective analysis was made of six patients with EAD of the tibia who underwent knee replacement at our centre. Mechanical axis of the tibia is considered and positioning of the tibia component is planned perpendicular to the mechanical axis of the tibia. The integrity of the collaterals determines the need for correction. Tibial resection >15mm from medial or lateral aspect of the tibia is an indication for corrective osteotomy prior to replacement surgery. The hip knee ankle angle (HKA) was noted. Pre-operative, post-operative clinical score, degree of constraints and post-operative complications were recorded. A post-operative long leg alignment radiograph was obtained.
Result
All patients had total knee replacement without correction of deformity. Adequate alignment of the limb and restoration of mechanical axis was achieved in all six patients without the need for correction of tibial deformity. All patients had improvement in their HKA angle and Oxford knee score. No re-operations were required, and no complications recorded.
Conclusions
Our study will help provide guidance on operative planning and decisions making for patients with extra-articular coronal plane tibial deformities.
Collapse
Affiliation(s)
- S M Choi
- University Hospital of Wales, Cardiff, United Kingdom
| | - R Kumar
- University Hospital of Wales, Cardiff, United Kingdom
| | | | - S Agarwal
- University Hospital of Wales, Cardiff, United Kingdom
| |
Collapse
|
6
|
Delanghe T, Huyghe J, Lee S, Priem D, Van Coillie S, Gilbert B, Choi SM, Vandenabeele P, Degterev A, Cuny GD, Dondelinger Y, Bertrand MJM. Antioxidant and food additive BHA prevents TNF cytotoxicity by acting as a direct RIPK1 inhibitor. Cell Death Dis 2021; 12:699. [PMID: 34262020 PMCID: PMC8280128 DOI: 10.1038/s41419-021-03994-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/02/2021] [Accepted: 07/05/2021] [Indexed: 12/28/2022]
Abstract
Butylate hydroxyanisole (BHA) is a synthetic phenol that is widely utilized as a preservative by the food and cosmetic industries. The antioxidant properties of BHA are also frequently used by scientists to claim the implication of reactive oxygen species (ROS) in various cellular processes, including cell death. We report on the surprising finding that BHA functions as a direct inhibitor of RIPK1, a major signaling hub downstream of several immune receptors. Our in silico analysis predicts binding of 3-BHA, but not 2-BHA, to RIPK1 in an inactive DLG-out/Glu-out conformation, similar to the binding of the type III inhibitor Nec-1s to RIPK1. This predicted superior inhibitory capacity of 3-BHA over 2-BHA was confirmed in cells and using in vitro kinase assays. We demonstrate that the reported protective effect of BHA against tumor necrosis factor (TNF)-induced necroptotic death does not originate from ROS scavenging but instead from direct RIPK1 enzymatic inhibition, a finding that most probably extends to other reported effects of BHA. Accordingly, we show that BHA not only protects cells against RIPK1-mediated necroptosis but also against RIPK1 kinase-dependent apoptosis. We found that BHA treatment completely inhibits basal and induced RIPK1 enzymatic activity in cells, monitored at the level of TNFR1 complex I under apoptotic conditions or in the cytosol under necroptosis. Finally, we show that oral administration of BHA protects mice from RIPK1 kinase-dependent lethality caused by TNF injection, a model of systemic inflammatory response syndrome. In conclusion, our results demonstrate that BHA can no longer be used as a strict antioxidant and that new functions of RIPK1 may emerge from previously reported effects of BHA.
Collapse
Affiliation(s)
- Tom Delanghe
- VIB Center for Inflammation Research, 9052, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, 9052, Ghent, Belgium
| | - Jon Huyghe
- VIB Center for Inflammation Research, 9052, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, 9052, Ghent, Belgium
| | - Seungheon Lee
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, University of Houston, Houston, TX, 77204, USA
| | - Dario Priem
- VIB Center for Inflammation Research, 9052, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, 9052, Ghent, Belgium
| | - Samya Van Coillie
- VIB Center for Inflammation Research, 9052, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, 9052, Ghent, Belgium
| | - Barbara Gilbert
- VIB Center for Inflammation Research, 9052, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, 9052, Ghent, Belgium
| | - Sze Men Choi
- VIB Center for Inflammation Research, 9052, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, 9052, Ghent, Belgium
| | - Peter Vandenabeele
- VIB Center for Inflammation Research, 9052, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, 9052, Ghent, Belgium
| | - Alexei Degterev
- Department of Developmental, Molecular & Chemical Biology, Tufts University School of Medicine, Boston, MA, 02111, USA
| | - Gregory D Cuny
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, University of Houston, Houston, TX, 77204, USA
| | - Yves Dondelinger
- VIB Center for Inflammation Research, 9052, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, 9052, Ghent, Belgium
| | - Mathieu J M Bertrand
- VIB Center for Inflammation Research, 9052, Ghent, Belgium. .,Department of Biomedical Molecular Biology, Ghent University, 9052, Ghent, Belgium.
| |
Collapse
|
7
|
Ko SJ, Cho J, Choi SM, Park YS, Lee CH, Lee SM, Yoo CG, Kim YW, Lee J. Phase Angle and Frailty Are Important Prognostic Factors in Critically Ill Medical Patients: A Prospective Cohort Study. J Nutr Health Aging 2021; 25:218-223. [PMID: 33491037 PMCID: PMC7548529 DOI: 10.1007/s12603-020-1487-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 07/27/2020] [Indexed: 01/27/2023]
Abstract
OBJECTIVES To investigate whether phase angle (PhA) measured by bioelectrical impedance analysis (BIA) and frailty are associated with the outcomes of critical illnesses. DESIGN A single-center prospective cohort study. SETTING Medical intensive care unit (ICU) in Seoul National University Hospital, Seoul, Republic of Korea. PARTICIPANTS 97 patients who were admitted to the medical ICU. MEASUREMENTS On admission, PhA was measured by BIA, and frailty was assessed by the Korean Modified Barthel Index (KMBI) scoring system. Patients were classified according to PhA and KMBI scores, and their impact on the outcomes of critical illnesses was evaluated. RESULTS The patients' mean age was 62.4 ± 16.4 years, and 56 of the patients (57.7%) were men. Having a high PhA above 3.5 at the time of ICU admission was associated with lower in-hospital mortality (adjusted OR 0.42, p = .042), and a shorter duration of ICU stay (5.6 days vs. 9.8 days, p = .016) compared to those with a low PhA. Other indices measured by BIA were not significantly associated with outcomes of critical illnesses. Frailty (KMBI > 60) was associated with more mechanical ventilation days (2.3 days vs. 7.1 days; p = .018). CONCLUSION Both PhA and frailty are important prognostic factors predicting the outcomes of critical illnesses. Low PhA scores were associated with increased mortality and a longer duration of ICU stay, and frailty was associated with more mechanical ventilation days.
Collapse
Affiliation(s)
- S J Ko
- Jinwoo Lee, MD, Department of Internal Medicine, Seoul National University College of Medicine, 103 Daehak-ro, Seoul, 03080, Republic of Korea; E-mail:
| | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Annibaldi A, Wicky John S, Vanden Berghe T, Swatek KN, Ruan J, Liccardi G, Bianchi K, Elliott PR, Choi SM, Van Coillie S, Bertin J, Wu H, Komander D, Vandenabeele P, Silke J, Meier P. Ubiquitin-Mediated Regulation of RIPK1 Kinase Activity Independent of IKK and MK2. Mol Cell 2019; 69:566-580.e5. [PMID: 29452637 PMCID: PMC5823975 DOI: 10.1016/j.molcel.2018.01.027] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Revised: 12/11/2017] [Accepted: 01/19/2018] [Indexed: 10/25/2022]
Abstract
Tumor necrosis factor (TNF) can drive inflammation, cell survival, and death. While ubiquitylation-, phosphorylation-, and nuclear factor κB (NF-κB)-dependent checkpoints suppress the cytotoxic potential of TNF, it remains unclear whether ubiquitylation can directly repress TNF-induced death. Here, we show that ubiquitylation regulates RIPK1's cytotoxic potential not only via activation of downstream kinases and NF-kB transcriptional responses, but also by directly repressing RIPK1 kinase activity via ubiquitin-dependent inactivation. We find that the ubiquitin-associated (UBA) domain of cellular inhibitor of apoptosis (cIAP)1 is required for optimal ubiquitin-lysine occupancy and K48 ubiquitylation of RIPK1. Independently of IKK and MK2, cIAP1-mediated and UBA-assisted ubiquitylation suppresses RIPK1 kinase auto-activation and, in addition, marks it for proteasomal degradation. In the absence of a functional UBA domain of cIAP1, more active RIPK1 kinase accumulates in response to TNF, causing RIPK1 kinase-mediated cell death and systemic inflammatory response syndrome. These results reveal a direct role for cIAP-mediated ubiquitylation in controlling RIPK1 kinase activity and preventing TNF-mediated cytotoxicity.
Collapse
Affiliation(s)
- Alessandro Annibaldi
- The Breast Cancer Now Toby Robins Research Centre, The Institute of Cancer Research, London, UK.
| | - Sidonie Wicky John
- The Breast Cancer Now Toby Robins Research Centre, The Institute of Cancer Research, London, UK
| | - Tom Vanden Berghe
- VIB Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Kirby N Swatek
- Medical Research Council, Laboratory of Molecular Biology, Cambridge, UK
| | - Jianbin Ruan
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Room 3024B, 3 Blackfan Circle, Boston, MA 02115, USA
| | - Gianmaria Liccardi
- The Breast Cancer Now Toby Robins Research Centre, The Institute of Cancer Research, London, UK
| | - Katiuscia Bianchi
- The Breast Cancer Now Toby Robins Research Centre, The Institute of Cancer Research, London, UK; Centre for Molecular Oncology, Barts Cancer Institute, Queen Mary University of London, London, UK
| | - Paul R Elliott
- Medical Research Council, Laboratory of Molecular Biology, Cambridge, UK
| | - Sze Men Choi
- VIB Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Samya Van Coillie
- VIB Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - John Bertin
- Pattern Recognition Receptor DPU and Platform Technology and Science, GlaxoSmithKline, Collegeville Road, Collegeville, PA 19426, USA
| | - Hao Wu
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Room 3024B, 3 Blackfan Circle, Boston, MA 02115, USA
| | - David Komander
- Medical Research Council, Laboratory of Molecular Biology, Cambridge, UK
| | - Peter Vandenabeele
- VIB Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - John Silke
- The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC 3050, Australia
| | - Pascal Meier
- The Breast Cancer Now Toby Robins Research Centre, The Institute of Cancer Research, London, UK.
| |
Collapse
|
9
|
Hassannia B, Wiernicki B, Ingold I, Qu F, Van Herck S, Tyurina YY, Bayır H, Abhari BA, Angeli JPF, Choi SM, Meul E, Heyninck K, Declerck K, Chirumamilla CS, Lahtela-Kakkonen M, Van Camp G, Krysko DV, Ekert PG, Fulda S, De Geest BG, Conrad M, Kagan VE, Vanden Berghe W, Vandenabeele P, Vanden Berghe T. Nano-targeted induction of dual ferroptotic mechanisms eradicates high-risk neuroblastoma. J Clin Invest 2018; 128:3341-3355. [PMID: 29939160 PMCID: PMC6063467 DOI: 10.1172/jci99032] [Citation(s) in RCA: 368] [Impact Index Per Article: 61.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 04/27/2018] [Indexed: 12/20/2022] Open
Abstract
High-risk neuroblastoma is a devastating malignancy with very limited therapeutic options. Here, we identify withaferin A (WA) as a natural ferroptosis-inducing agent in neuroblastoma, which acts through a novel double-edged mechanism. WA dose-dependently either activates the nuclear factor-like 2 pathway through targeting of Kelch-like ECH-associated protein 1 (noncanonical ferroptosis induction) or inactivates glutathione peroxidase 4 (canonical ferroptosis induction). Noncanonical ferroptosis induction is characterized by an increase in intracellular labile Fe(II) upon excessive activation of heme oxygenase-1, which is sufficient to induce ferroptosis. This double-edged mechanism might explain the superior efficacy of WA as compared with etoposide or cisplatin in killing a heterogeneous panel of high-risk neuroblastoma cells, and in suppressing the growth and relapse rate of neuroblastoma xenografts. Nano-targeting of WA allows systemic application and suppressed tumor growth due to an enhanced accumulation at the tumor site. Collectively, our data propose a novel therapeutic strategy to efficiently kill cancer cells by ferroptosis.
Collapse
Affiliation(s)
- Behrouz Hassannia
- VIB Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Bartosz Wiernicki
- VIB Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Irina Ingold
- Helmholtz Zentrum München, Institute of Developmental Genetics, Neuherberg, Germany
| | - Feng Qu
- Center for Free Radical and Antioxidant Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Simon Van Herck
- Department of Pharmaceutics, Ghent University, Ghent, Belgium
| | - Yulia Y. Tyurina
- Center for Free Radical and Antioxidant Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Hülya Bayır
- Center for Free Radical and Antioxidant Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Behnaz A. Abhari
- Institute for Experimental Cancer Research in Pediatrics, Goethe-University, Frankfurt, Germany
| | | | - Sze Men Choi
- VIB Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Eline Meul
- VIB Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Karen Heyninck
- Laboratory of Eukaryotic Gene Expression and Signal Transduction, Department of Physiology, Ghent University, Ghent, Belgium
| | - Ken Declerck
- Laboratory of Protein Chemistry, Proteomics and Epigenetic Signalling (PPES), Department of Biomedical Sciences, University of Antwerp, Wilrijk, Belgium
| | - Chandra Sekhar Chirumamilla
- Laboratory of Protein Chemistry, Proteomics and Epigenetic Signalling (PPES), Department of Biomedical Sciences, University of Antwerp, Wilrijk, Belgium
| | - Maija Lahtela-Kakkonen
- School of Pharmacy, Pharmaceutical Chemistry, University of Eastern Finland, Kuopio, Finland
| | - Guy Van Camp
- Center of Medical Genetics, Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Dmitri V. Krysko
- VIB Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Paul G. Ekert
- Cancer Research, Murdoch Children’s Research Institute, Royal Children’s Hospital, Parkville, Victoria, Australia
| | - Simone Fulda
- Institute for Experimental Cancer Research in Pediatrics, Goethe-University, Frankfurt, Germany
- German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | | | - Marcus Conrad
- Helmholtz Zentrum München, Institute of Developmental Genetics, Neuherberg, Germany
| | - Valerian E. Kagan
- Center for Free Radical and Antioxidant Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Wim Vanden Berghe
- Laboratory of Eukaryotic Gene Expression and Signal Transduction, Department of Physiology, Ghent University, Ghent, Belgium
- Laboratory of Protein Chemistry, Proteomics and Epigenetic Signalling (PPES), Department of Biomedical Sciences, University of Antwerp, Wilrijk, Belgium
| | - Peter Vandenabeele
- VIB Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
- Methusalem Program, Ghent University, Ghent, Belgium
| | - Tom Vanden Berghe
- VIB Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| |
Collapse
|
10
|
Lee JG, Kim SY, Kim YT, Lee HJ, Park S, Choi SM, Kim DH, Cho WH, Yeo HJ, Park S, Choi SH, Hong SB, Shim TS, Jo KW, Jeon K, Jeong BH, Paik HC. First Report of the Korean Lung Transplantation Registry. Transplant Proc 2018; 50:2759-2763. [PMID: 30401392 DOI: 10.1016/j.transproceed.2018.02.185] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 02/26/2018] [Indexed: 10/17/2022]
Abstract
BACKGROUND The Korean Organ Transplantation Registry (KOTRY) began to register lung transplants in 2015. This is an initial report on the status of patients receiving lung transplants over the past 2 years. METHODS We analyzed a total of 69 patients who received lung transplants in 2015 and 2016 and who registered with the KOTRY. RESULTS The 69 patients were treated in 5 institutions. The average (SD) donor age was 39.2 (12.6) years; there were 40 male patients. The average (SD) recipient age was 55.7 (10.0) years, and the number of male recipients was 46. A total of 66 patients underwent bilateral lung transplantation, 3 underwent single-lung transplantation, and 1 underwent simultaneous heart-lung transplantation. The most frequent indication for lung transplantation was idiopathic pulmonary fibrosis (35 patients), followed by connective tissue disease-related interstitial lung disease (9) and acute respiratory failure (8). Prior to transplantation, 23 patients required ventilator care, and 12 required extracorporeal membrane oxygenation while on the waiting list. Episodes of acute rejection during follow-up were reported in 4, 2, 1, and 1 patients at 3, 6, 9, and 12 months, respectively. Infections requiring hospitalization were reported in 27, 10, 4, and 3 patients at 3, 6, 9, and 12 months, respectively. CONCLUSION The establishment of KOTRY renders it possible to collect nationwide data on lung transplantation, improving research on the topic and clarifying clinical feasibility.
Collapse
Affiliation(s)
- J G Lee
- Department of Thoracic and Cardiovascular Surgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - S Y Kim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Y T Kim
- Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - H J Lee
- Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - S Park
- Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - S M Choi
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - D H Kim
- Department of Thoracic and Cardiovascular Surgery, YangSan Hospital, Pusan National University, Gyeongsangnam-do, Korea
| | - W H Cho
- Department of Pulmonology and Critical Care Medicine, YangSan Hospital, Pusan National University, Gyeongsangnam-do, Korea
| | - H J Yeo
- Department of Pulmonology and Critical Care Medicine, YangSan Hospital, Pusan National University, Gyeongsangnam-do, Korea
| | - S Park
- Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - S H Choi
- Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - S-B Hong
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - T S Shim
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - K-W Jo
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - K Jeon
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - B-H Jeong
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - H C Paik
- Department of Thoracic and Cardiovascular Surgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
| | | |
Collapse
|
11
|
Cho BK, Kim YM, Choi SM, Park HW, SooHoo NF. Revision anatomical reconstruction of the lateral ligaments of the ankle augmented with suture tape for patients with a failed Broström procedure. Bone Joint J 2017; 99-B:1183-1189. [PMID: 28860398 DOI: 10.1302/0301-620x.99b9.bjj-2017-0144.r1] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 05/04/2017] [Indexed: 11/05/2022]
Abstract
AIMS The aim of this prospective study was to evaluate the intermediate-term outcomes after revision anatomical ankle ligament reconstruction augmented with suture tape for a failed modified Broström procedure. PATIENTS AND METHODS A total of 30 patients with persistent instability of the ankle after a Broström procedure underwent revision augmented with suture tape. Of these, 24 patients who were followed up for more than two years were included in the study. There were 13 men and 11 women. Their mean age was 31.8 years (23 to 44). The mean follow-up was 38.5 months (24 to 56) The clinical outcome was assessed using the Foot and Ankle Outcome Score (FAOS) and the Foot and Ankle Ability Measure (FAAM) score. The stability of the ankle was assessed using stress radiographs. RESULTS The mean FAOS and FAAM scores improved significantly to 87.5 (73 to 94) and 85.1 (70 to 95) points at final follow-up, respectively (p < 0.001). The mean angle of talar tilt and anterior talar translation improved significantly to 2.8° (0° to 6°) and 4.1 mm (2 to 7) at final follow-up, respectively (p < 0.001). Side to side comparison in stress radiographs at final follow-up showed no significant difference. The revision failed in one patient who underwent a further revision using allograft tendon. CONCLUSION The revision modified Broström procedure augmented with suture tape is an effective form of treatment for recurrent instability of the ankle following a failed Broström procedure. This technique provides reliable stability and satisfactory clinical outcomes at intermediate-term follow-up. Cite this article: Bone Joint J 2017;99-B:1183-9.
Collapse
Affiliation(s)
- B K Cho
- College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - Y M Kim
- College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - S M Choi
- College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - H W Park
- School of Medicine, University of California, Los Angeles, California, USA
| | - N F SooHoo
- School of Medicine, University of California, Los Angeles, California, USA
| |
Collapse
|
12
|
Jeh SU, Yoon S, Seo DH, Lee SW, Lee C, Choi SM, Kam SC, Hwa JS, Chung KH, Hyun JS. Relationship between serum testosterone and nocturia in men without benign prostate enlargement. Andrology 2016; 5:58-62. [PMID: 27636882 DOI: 10.1111/andr.12270] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 07/11/2016] [Accepted: 07/18/2016] [Indexed: 02/05/2023]
Abstract
Recent studies have focused on the relationship between nocturia and serum testosterone because testosterone is thought to be an important factor of prostate growth. However, it remains unclear whether altered serum concentrations of testosterone is associated with an increased risk of nocturia because patients who were taking diuretics or who had a large prostate, which may precipitate nocturia, were not excluded from most previous studies. We analyzed the clinical records of 596 non-benign prostatic enlargement (BPE) male patients to explore the relationship between serum total testosterone and nocturia. All patients were evaluated using a serum prostate-specific antigen (PSA) assay, measurement of serum total testosterone, transrectal ultrasonography, uroflowmetry, and a compilation of the International Prostate Symptom Score (IPSS) and International Index of Erectile Function (IIEF) questionnaires. Nocturia was defined as ≥2 nocturnal voiding episodes. The number of nocturia episodes was assessed using IPSS question 7. To evaluate the effect of serum testosterone on nocturia, multivariate regression analysis was performed including the covariates of age, IPSS, IIEF score, body mass index, PSA, prostate volume, and maximal urine flow rate. Based on multivariate linear analysis, serum testosterone level was not significantly associated with the severity of nocturia. However, with regard to the relationship between prevalence of nocturia and serum testosterone, prevalence of nocturia was significantly positively associated with age (OR = 1.048, p = 0.005), total IPSS (OR = 1.217, p < 0.001), and testosterone level (OR = 1.150, p = 0.041). Therefore, in men without an enlarged prostate, testosterone may play an opposing role in the etiology of nocturia.
Collapse
Affiliation(s)
- S U Jeh
- Department of Urology, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea
| | - S Yoon
- Department of Urology, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea
| | - D H Seo
- Department of Urology, Gyeongsang National University Changwon Hospital, Changwon, Korea
| | - S W Lee
- Department of Urology, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea
| | - C Lee
- Department of Urology, Gyeongsang National University Changwon Hospital, Changwon, Korea
| | - S M Choi
- Department of Urology, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea
| | - S C Kam
- Department of Urology, Gyeongsang National University Changwon Hospital, Changwon, Korea
| | - J S Hwa
- Department of Urology, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea
| | - K H Chung
- Department of Urology, Gyeongsang National University Changwon Hospital, Changwon, Korea
| | - J S Hyun
- Department of Urology, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea
| |
Collapse
|
13
|
de Vin F, Choi SM, Bolognesi ML, Lefebvre RA. Presynaptic M3 muscarinic cholinoceptors mediate inhibition of excitatory synaptic transmission in area CA1 of rat hippocampus. Brain Res 2015; 1629:260-9. [DOI: 10.1016/j.brainres.2015.10.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2015] [Revised: 10/11/2015] [Accepted: 10/16/2015] [Indexed: 11/26/2022]
|
14
|
Vanden Berghe T, Hulpiau P, Martens L, Vandenbroucke RE, Van Wonterghem E, Perry SW, Bruggeman I, Divert T, Choi SM, Vuylsteke M, Shestopalov VI, Libert C, Vandenabeele P. Passenger Mutations Confound Interpretation of All Genetically Modified Congenic Mice. Immunity 2015; 43:200-9. [PMID: 26163370 DOI: 10.1016/j.immuni.2015.06.011] [Citation(s) in RCA: 134] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Revised: 04/09/2015] [Accepted: 06/11/2015] [Indexed: 12/13/2022]
Abstract
Targeted mutagenesis in mice is a powerful tool for functional analysis of genes. However, genetic variation between embryonic stem cells (ESCs) used for targeting (previously almost exclusively 129-derived) and recipient strains (often C57BL/6J) typically results in congenic mice in which the targeted gene is flanked by ESC-derived passenger DNA potentially containing mutations. Comparative genomic analysis of 129 and C57BL/6J mouse strains revealed indels and single nucleotide polymorphisms resulting in alternative or aberrant amino acid sequences in 1,084 genes in the 129-strain genome. Annotating these passenger mutations to the reported genetically modified congenic mice that were generated using 129-strain ESCs revealed that nearly all these mice possess multiple passenger mutations potentially influencing the phenotypic outcome. We illustrated this phenotypic interference of 129-derived passenger mutations with several case studies and developed a Me-PaMuFind-It web tool to estimate the number and possible effect of passenger mutations in transgenic mice of interest.
Collapse
Affiliation(s)
- Tom Vanden Berghe
- Inflammation Research Center, VIB, 9000 Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, 9000 Ghent, Belgium.
| | - Paco Hulpiau
- Inflammation Research Center, VIB, 9000 Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, 9000 Ghent, Belgium
| | - Liesbet Martens
- Inflammation Research Center, VIB, 9000 Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, 9000 Ghent, Belgium
| | - Roosmarijn E Vandenbroucke
- Inflammation Research Center, VIB, 9000 Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, 9000 Ghent, Belgium
| | - Elien Van Wonterghem
- Inflammation Research Center, VIB, 9000 Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, 9000 Ghent, Belgium
| | - Seth W Perry
- Department of Biomedical Engineering, University of Rochester, Rochester NY 14627, USA
| | - Inge Bruggeman
- Inflammation Research Center, VIB, 9000 Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, 9000 Ghent, Belgium
| | - Tatyana Divert
- Inflammation Research Center, VIB, 9000 Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, 9000 Ghent, Belgium
| | - Sze Men Choi
- Inflammation Research Center, VIB, 9000 Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, 9000 Ghent, Belgium
| | | | - Valery I Shestopalov
- Department of Ophthalmology, Bascom Palmer Eye Institute, Miami, FL 33136, USA; Department of Cell Biology and Anatomy, University of Miami School of Medicine, Miami, FL 33136, USA; Department of Cell Biology and Anatomy, Vavilov Institute for General Genetics, Moscow 119333, Russia
| | - Claude Libert
- Inflammation Research Center, VIB, 9000 Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, 9000 Ghent, Belgium
| | - Peter Vandenabeele
- Inflammation Research Center, VIB, 9000 Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, 9000 Ghent, Belgium; Methusalem Program, Ghent University, 9000 Ghent.
| |
Collapse
|
15
|
Jeon JI, Ko SH, Kim YJ, Choi SM, Kang KK, Kim H, Yoon HJ, Kim JM. The flavone eupatilin inhibits eotaxin expression in an NF-κB-dependent and STAT6-independent manner. Scand J Immunol 2015; 81:166-76. [PMID: 25565108 DOI: 10.1111/sji.12263] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Accepted: 12/19/2014] [Indexed: 12/31/2022]
Abstract
The CC chemokine eotaxin contributes to epithelium-induced inflammation in airway diseases such as asthma. Eupatilin (5,7-dihydroxy-3',4',6'-trimethoxyflavone), a bioactive component of Artemisia asiatica Nakai (Asteraceae), is reported to inhibit the adhesion of eosinophils to bronchial epithelial cells. However, little is known about the molecular mechanism of eupatilin-induced attenuation of bronchial epithelium-induced inflammation. In this study, we investigated the effect of eupatilin on expression of eotaxin-1 (CCL11), a potent chemoattractant for eosinophils. Eupatilin significantly inhibited eotaxin expression in bronchial epithelial cells stimulated with TNF-α, while NF-κB and IκBα kinase (IKK) activities declined concurrently. Eupatilin also inhibited mitogen-activated protein kinase (MAPK) activity; however, all of these anti-inflammatory activities were reversed by MAPK overexpression. In contrast, eupatilin did not affect the signal transducer and activator of transcription 6 (STAT6) signalling in bronchial epithelial cells stimulated with IL-4. Furthermore, eupatilin significantly attenuated TNF-α-induced eosinophil migration. These results suggest that the eupatilin inhibits the signalling of MAPK, IKK, NF-κB and eotaxin-1 in bronchial epithelial cells, leading to inhibition of eosinophil migration.
Collapse
Affiliation(s)
- J I Jeon
- Department of Microbiology and Department of Biomedical Science, Hanyang University College of Medicine and Hanyang University Graduate School of Biomedical Science and Engineering, Seoul, South Korea
| | | | | | | | | | | | | | | |
Collapse
|
16
|
Oh B, Butow PN, Boyle F, Beale PJ, Costa D, Pavlakis N, Bell DR, Choi SM, Lee MS, Rosenthal DS, Clarke SJ. Effects of qigong on quality of life, fatigue, stress, neuropathy, and sexual function in women with metastatic breast cancer: A feasibility study. J Clin Oncol 2014. [DOI: 10.1200/jco.2014.32.15_suppl.e20712] [Citation(s) in RCA: 2] [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: 11/20/2022] Open
Affiliation(s)
| | | | | | | | | | - Nick Pavlakis
- Department of Medical Oncology, Royal North Shore Hospital, The University of Sydney, Sydney, Australia
| | | | - SM Choi
- Korea Institute of Oriental Medicine, DaeJeon, South Korea
| | - MS Lee
- Korea Institute of Oriental Medicine, DaeJeon, South Korea
| | | | | |
Collapse
|
17
|
Berghe TV, Demon D, Bogaert P, Vandendriessche B, Goethals A, Depuydt B, Vuylsteke M, Roelandt R, Van Wonterghem E, Vandenbroecke J, Choi SM, Meyer E, Krautwald S, Declercq W, Takahashi N, Cauwels A, Vandenabeele P. Simultaneous targeting of interleukin-1 and interleukin-18 is required for protection against inflammatory and septic shock. Crit Care 2014. [PMCID: PMC4273742 DOI: 10.1186/cc14023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
18
|
Berghe TV, Demon D, Bogaert P, Vandendriessche B, Goethals A, Depuydt B, Vuylsteke M, Roelandt R, Van Wonterghem E, Vandenbroecke J, Choi SM, Meyer E, Krautwald S, Declercq W, Takahashi N, Cauwels A, Vandenabeele P. Simultaneous Targeting of IL-1 and IL-18 Is Required for Protection against Inflammatory and Septic Shock. Am J Respir Crit Care Med 2014; 189:282-91. [DOI: 10.1164/rccm.201308-1535oc] [Citation(s) in RCA: 117] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
|
19
|
Kim HM, So BH, Jeong WJ, Choi SM, Park KN. The effectiveness of ultrasonography in verifying the placement of a nasogastric feeding tube in patients with low consciousness at an emergency center. Crit Ultrasound J 2014. [PMCID: PMC4101373 DOI: 10.1186/2036-7902-6-s1-a16] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
20
|
Cho BH, Choi YUN, Nam TS, Choi SM, Lee SH, Park MS, Kim MK. Characteristics of primary exertional headache in Korean marine corps. J Headache Pain 2013. [PMCID: PMC3620286 DOI: 10.1186/1129-2377-14-s1-p39] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
|
21
|
Cho BH, Choi YUN, Nam TS, Choi SM, Lee SH, Park MS, Kim MK. Characteristics of primary exertional headache in Korean marine corps. J Headache Pain 2013. [DOI: 10.1186/1129-2377-1-s1-p39] [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
|
22
|
Ko SH, Yoo DY, Kim YJ, Choi SM, Kang KK, Kim H, Kim N, Kim JS, Kim JM. A mechanism for the action of the compound DA-6034 on NF-κB pathway activation in Helicobacter pylori-infected gastric epithelial cells. Scand J Immunol 2011; 74:253-263. [PMID: 21623862 DOI: 10.1111/j.1365-3083.2011.02577.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
DA-6034 is a synthetic derivative of eupatilin, a flavonoid with anti-inflammatory effects. The aim of this study was to investigate the effects of DA-6034 on the interactions between IκB kinase (IKK) and heat shock protein 90 (Hsp90), and activation of the nuclear factor-kappaB (NF-κB) signalling pathway in human gastric epithelial cells infected with Helicobacter pylori. MKN-45 gastric epithelial cell line was treated with DA-6034 and H. pylori. DA-6034 significantly inhibited NF-κB activation and upregulated the expressions of interleukin-8 (IL-8) and monocyte chemoattractant protein-1 in MKN-45 cells infected with H. pylori. However, DA-6034 did not influence activator protein-1 DNA binding activity in H. pylori-infected gastric epithelial cells. Pretreatment with DA-6034 attenuated the H. pylori-induced increase in IKK activity, and Hsp90 was associated with IKK-α and IKK-γ in MKN-45 cells. Treatment with DA-6034 dissociated the Hsp90 and IKK-γ complex in H. pylori-infected cells, leading to the inhibition of IL-8 expression. These results suggest that the eupatilin derivative 7-carboxymethyloxy-3',4',5-trimethoxy flavone has anti-inflammatory activity in gastric epithelial cells infected with H. pylori through the promotion of the dissociation of the IKK-γ-Hsp90 complex and suppression of NF-κB signalling.
Collapse
Affiliation(s)
- S H Ko
- Department of Microbiology, Hanyang University College of Medicine, Seoul, KoreaDepartment of Biotechnology, Joongbu University, Choongnam, KoreaResearch Laboratory, Dong-A Pharmaceutical Company, Kyunggi-do, KoreaDepartment of Food and Nutrition, Yonsei University, Seoul, KoreaDepartment of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - D Y Yoo
- Department of Microbiology, Hanyang University College of Medicine, Seoul, KoreaDepartment of Biotechnology, Joongbu University, Choongnam, KoreaResearch Laboratory, Dong-A Pharmaceutical Company, Kyunggi-do, KoreaDepartment of Food and Nutrition, Yonsei University, Seoul, KoreaDepartment of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Y-J Kim
- Department of Microbiology, Hanyang University College of Medicine, Seoul, KoreaDepartment of Biotechnology, Joongbu University, Choongnam, KoreaResearch Laboratory, Dong-A Pharmaceutical Company, Kyunggi-do, KoreaDepartment of Food and Nutrition, Yonsei University, Seoul, KoreaDepartment of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - S M Choi
- Department of Microbiology, Hanyang University College of Medicine, Seoul, KoreaDepartment of Biotechnology, Joongbu University, Choongnam, KoreaResearch Laboratory, Dong-A Pharmaceutical Company, Kyunggi-do, KoreaDepartment of Food and Nutrition, Yonsei University, Seoul, KoreaDepartment of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - K K Kang
- Department of Microbiology, Hanyang University College of Medicine, Seoul, KoreaDepartment of Biotechnology, Joongbu University, Choongnam, KoreaResearch Laboratory, Dong-A Pharmaceutical Company, Kyunggi-do, KoreaDepartment of Food and Nutrition, Yonsei University, Seoul, KoreaDepartment of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - H Kim
- Department of Microbiology, Hanyang University College of Medicine, Seoul, KoreaDepartment of Biotechnology, Joongbu University, Choongnam, KoreaResearch Laboratory, Dong-A Pharmaceutical Company, Kyunggi-do, KoreaDepartment of Food and Nutrition, Yonsei University, Seoul, KoreaDepartment of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - N Kim
- Department of Microbiology, Hanyang University College of Medicine, Seoul, KoreaDepartment of Biotechnology, Joongbu University, Choongnam, KoreaResearch Laboratory, Dong-A Pharmaceutical Company, Kyunggi-do, KoreaDepartment of Food and Nutrition, Yonsei University, Seoul, KoreaDepartment of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - J S Kim
- Department of Microbiology, Hanyang University College of Medicine, Seoul, KoreaDepartment of Biotechnology, Joongbu University, Choongnam, KoreaResearch Laboratory, Dong-A Pharmaceutical Company, Kyunggi-do, KoreaDepartment of Food and Nutrition, Yonsei University, Seoul, KoreaDepartment of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - J M Kim
- Department of Microbiology, Hanyang University College of Medicine, Seoul, KoreaDepartment of Biotechnology, Joongbu University, Choongnam, KoreaResearch Laboratory, Dong-A Pharmaceutical Company, Kyunggi-do, KoreaDepartment of Food and Nutrition, Yonsei University, Seoul, KoreaDepartment of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| |
Collapse
|
23
|
Nam SW, Lim YS, Choi SM, Seo WS, Park K. Thermoelectric properties of nanocrystalline Ca(3-x)Cu(x)Co4O9 (0 < or = x < or = 0.32) for power generation. J Nanosci Nanotechnol 2011; 11:1734-1737. [PMID: 21456279 DOI: 10.1166/jnn.2011.3347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We successfully synthesized nano-sized Ca(3-x)Cu(x)Co4O9 (0 < or = x < or = 0.32) powders by solution combustion process. Plate-like grains and porous structure were observed in the sintered Ca(3-x)Cu(x)Co4O9 ceramics. The sintered Ca(3-x)Cu(x)Co4O9 showed a monoclinic symmetry. The electrical conductivity of the Ca(3-x)Cu(x)Co4O9 increased with increasing temperature, indicative of a semiconducting behavior. The added Cu led to a significant increase in the electrical conductivity. The Seebeck coefficient of the Cu-added Ca(3-x)Cu(x)Co4O9 was much higher than that of the Cu-free Ca3Co4O9. The highest power factor (9.99 x 10(-4) Wm(-1)K-2) was obtained for Ca2.76Cu0.24Co4O9 at 800 degrees C.
Collapse
Affiliation(s)
- S W Nam
- Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 143-747, Korea
| | | | | | | | | |
Collapse
|
24
|
Park SH, Choi SS, Oh SA, Kim CK, Cho SJ, Lee JH, Ryu SH, Pak SH, Jung SK, Lee JI, Park GY, Choi SM, Chae YZ, Kang BH, Cheon DS, Kim HS. Detection and characterization of enterovirus associated with herpangina and hand, foot, and mouth disease in Seoul, Korea. Clin Lab 2011; 57:959-967. [PMID: 22239028] [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: 05/31/2023]
Abstract
BACKGROUND Human enteroviruses (HEVs) are a major cause of herpangina, HFMD (hand, foot, and mouth disease), and other neurological diseases in Seoul, Korea. METHODS A total of 56 specimens from hospitalized patients collected from February to December 2009 (37 females and 19 males) in Seoul were tested for HEV from stool, throat swab, and vesicle swab samples taken from patients with herpangina or HFMD using cell culture and RT-PCR in 2009. By the 1D gene, encoding the VP1 capsid protein, seven different HEV genotypes were detected with Coxsackievirus A2, A4, A5, A9, A16 (CA), Coxsackievirus B1 (CB), and Enterovirus 71 (EV71). The most prevalent genotype was CA16 (6, 10.7%), followed by CA2 (4, 7.1%), CA5 (4, 7.1%), EV71 (2, 3.6%), CA4 (1, 1.8%), CA9 (1, 1.8%), and CB1 (1, 1.8%). The 1D gene sequences of two EV71 strains were closely related with one another (98.5% nucleotide similarity) and belonged to the C4 genotype. CONCLUSIONS It is important to continuously survey the genetic characteristics of EV71 and CA16 from patients, which will provide useful data that aids in our understanding of HFMD infections in Seoul, Korea and may contribute to future control.
Collapse
MESH Headings
- Capsid Proteins/genetics
- Child, Preschool
- Coxsackievirus Infections/epidemiology
- Coxsackievirus Infections/virology
- Disease Outbreaks
- Enterovirus/genetics
- Enterovirus/isolation & purification
- Enterovirus A, Human/genetics
- Enterovirus A, Human/isolation & purification
- Enterovirus B, Human/genetics
- Enterovirus B, Human/isolation & purification
- Enterovirus Infections/epidemiology
- Enterovirus Infections/virology
- Feces/virology
- Female
- Hand, Foot and Mouth Disease/epidemiology
- Hand, Foot and Mouth Disease/virology
- Herpangina/epidemiology
- Herpangina/virology
- Humans
- Infant
- Infant, Newborn
- Male
- Pharynx/virology
- Phylogeny
- RNA, Viral/genetics
- RNA, Viral/isolation & purification
- Republic of Korea/epidemiology
- Sequence Analysis, RNA
Collapse
Affiliation(s)
- S H Park
- Seoul Metropolitan Government Research Institute of Public Health and Environment, Virus Team, 202-3, Yangjae-Dong, Seocho-Gu, Seoul 137-734, Republic of Korea.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Kim ST, Kim YJ, Lee JY, Lee H, Yin CS, Choi SM, Chae Y, Lee H, Park HJ. Acupuncture enhances superoxide dismutase (SOD) activity in the serum of rheumatoid arthritis patients. Clin Exp Rheumatol 2009; 27:384. [PMID: 19473588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
|
26
|
Yim YK, Kang WC, Cho JH, Shin JW, Lee NH, Choi SM, Koo ST, Park KS, Son CG. Crossover clinical trial to determine the effect of manual acupuncture at Siguan points (bilateral LI4 and LR3) on intestinal motility in healthy subjects. Am J Chin Med 2007; 35:209-18. [PMID: 17436362 DOI: 10.1142/s0192415x07004758] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This study examined whether manual acupuncture at the Siguan points (bilateral points LI4 and LR3) affects intestinal motility in healthy human subjects. Twenty healthy male subjects were randomly assigned either to real acupuncture (RA) at Siguan points or sham acupuncture (SA) groups in a crossover manner. All subjects underwent two experimental sessions; the RA group in the first session was treated with SA in the second session after a 2-week washout period, and vice versa. Each subject took 20 radio-markers and was treated with acupuncture 0, 12, 24, and 36 hours after radio-marker intake. Radiographs were taken at 6, 12.5, 24.5, and 48 hours, and the effect of acupuncture on intestinal motility was evaluated based on the distribution of the radio-markers in the ileum, ascending colon, transverse colon, descending colon, sigmoid/ rectum, and outside the body. Defecating habit was monitored during the trial, and complete blood counts were checked before and after the two acupuncture sessions. The RA and SA results showed extremely similar distributions of the radio-markers in these five regions of the alimentary canal and outside the body in radiographs taken at four different times, verifying that there was no effect of manual acupuncture at the Siguan points on intestinal motility, at least in healthy human subjects.
Collapse
Affiliation(s)
- Y K Yim
- Department of Meridian and Acupoint, College of Oriental Medicine, Daejeon University, Daejeon 300-716, South Korea
| | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Hwang H, Koo ST, Kim YS, Lee JE, Han KJ, Choi SM. Effects of electroacupuncture on the expression of iNOS in Nuclei of solitary tract and Rostral ventrolateral medulla in spontaneously hypertensive rats. FASEB J 2007. [DOI: 10.1096/fasebj.21.6.lb16-b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- HyeSuk Hwang
- Department of Medical ResearchKorea Institute of Oriental Medicine461‐24 Jeonmin‐dong, Yuseong‐guDaejeon305‐811Korea, Republic of
| | - ST Koo
- Department of Medical ResearchKorea Institute of Oriental Medicine461‐24 Jeonmin‐dong, Yuseong‐guDaejeon305‐811Korea, Republic of
| | - YS Kim
- Department of Medical ResearchKorea Institute of Oriental Medicine461‐24 Jeonmin‐dong, Yuseong‐guDaejeon305‐811Korea, Republic of
| | - JE Lee
- Department of Medical ResearchKorea Institute of Oriental Medicine461‐24 Jeonmin‐dong, Yuseong‐guDaejeon305‐811Korea, Republic of
| | - KJ Han
- Department of Medical ResearchKorea Institute of Oriental Medicine461‐24 Jeonmin‐dong, Yuseong‐guDaejeon305‐811Korea, Republic of
| | - SM Choi
- Department of Medical ResearchKorea Institute of Oriental Medicine461‐24 Jeonmin‐dong, Yuseong‐guDaejeon305‐811Korea, Republic of
| |
Collapse
|
28
|
Purr I, Siekmeier R, Choi SM, Horré R, Schmitt-Grohé S, Marklein G. Pseudomonas aeruginosa bei Patienten mit Cystischer Fibrose (CF): Minimale Hemmkonzentrationen (MHK) von Tobramycin (TOB) und Colistin (COL). Pneumologie 2004. [DOI: 10.1055/s-2004-835951] [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: 10/19/2022]
|
29
|
Yoo JH, Lee DG, Choi SM, Choi JH, Park YH, Kim YJ, Kim HJ, Lee S, Kim DW, Lee JW, Min WS, Shin WS, Kim CC. Infectious complications and outcomes after allogeneic hematopoietic stem cell transplantation in Korea. Bone Marrow Transplant 2004; 34:497-504. [PMID: 15286689 DOI: 10.1038/sj.bmt.1704636] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
We reviewed 242 allogeneic hematopoietic stem cell transplantation (HSCT) recipients retrospectively over a 2-year period (January 1998-December 1999) in order to analyze the characteristics and assess the outcomes of infectious complications in patients after HSCT in Korea. Bacteria were the major pathogens before engraftment, and viral and fungal infections predominated during the post-engraftment period. Varicella zoster virus was the most common viral pathogen after engraftment. Cytomegalovirus disease occurred mainly in the late-recovery phase. The frequency of mold infection was higher than that of yeast. There was a relatively high incidence of tuberculosis (3.0%) and Pneumocystis carinii pneumonia (6.5%). One case of death by measles confirmed by autopsy was also noted. Overall, cumulative mortality was 43% (104/242), and 59.6% of these deaths (62/104) were infection-related. Allogeneic HSCT recipients from unrelated donors were prone to infectious complication and higher mortality than those from matched sibling (17/39 (43.6%) vs 45/203 (22.2%), respectively; P<0.01; odd ratio 2.5; 95% confidence interval 1.2-5.1). As infection was the main post-HSCT complication in our data, more attention should be given to the management of infections in HSCT recipients.
Collapse
Affiliation(s)
- J-H Yoo
- Department of Internal Medicine, The Catholic Hematopoietic Stem Cell Transplantion Center, College of Medicine, The Catholic University of Korea, Seoul, Korea.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Horré R, Sterzik B, Schnitzler N, Siekmeier R, de Hoog GS, Becker WHJ, Choi SM, Ratz H, Tintelnot K, Rainer J. Die Lunge als Eintrittspforte zerebraler Scedosporiosen nach Beinahe-Ertrinken – Auftreten neuer humanpathogener Erreger durch Umweltverschmutzung? Pneumologie 2003. [DOI: 10.1055/s-2003-815347] [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: 10/19/2022]
|
31
|
Horré R, Sterzik B, Schnitzler N, Siekmeier R, de Hoog GS, Becker WHJ, Choi SM, Ratz H, Tintelnot K, Rainer J. Die Lunge als Eintrittspforte zerebraler Scedosporiosen nach Beinahe-Ertrinken – Auftreten neuer humanpathogener Erreger durch Umweltverschmutzung? Pneumologie 2003. [DOI: 10.1055/s-2003-822452] [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: 10/19/2022]
|
32
|
Park SR, Choi SM, Dender DC, Lynn JW, Ling XS. Fate of the peak effect in a type-II superconductor: multicriticality in the Bragg-Glass transition. Phys Rev Lett 2003; 91:167003. [PMID: 14611430 DOI: 10.1103/physrevlett.91.167003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2003] [Indexed: 05/24/2023]
Abstract
We have used small-angle neutron scattering (SANS) and ac magnetic susceptibility to investigate the global magnetic field H vs temperature T phase diagram of a Nb single crystal in which a first-order transition of Bragg-glass melting (disordering), a peak effect, and surface superconductivity are all observable. It was found that the disappearance of the peak effect is directly related to a multicritical behavior in the Bragg-glass transition. Four characteristic phase boundary lines have been identified on the H-T plane: a first-order line at high fields, a mean-field-like continuous transition line at low fields, and two continuous transition lines associated with the onset of surface and bulk superconductivity. All four lines are found to meet at a multicritical point.
Collapse
Affiliation(s)
- S R Park
- Department of Physics, Brown University, Providence, Rhode Island 02912, USA
| | | | | | | | | |
Collapse
|
33
|
Horré R, Jovanić B, Marklein G, Schumacher G, Friedrichs N, Neuhaus T, de Hoog GS, Becker WHJ, Choi SM, Schaal KP. Fatal pulmonary scedosporiosis. Letal verlaufende pulmonale Scedosporiose. Mycoses 2003; 46:418-21. [PMID: 14622392 DOI: 10.1046/j.0933-7407.2003.00918.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We report on a case of scedosporiosis in a 72-year-old German woman. Her disease started with a purulent ulceration of unknown course at her left foot. Soon after onset of oral antibacterial therapy she needed in-hospital treatment because of an acute pneumonia. The infection progressed despite the application of different antibiotics. Microscopic examination of tracheal fluid revealed fungal hyphae and therefore treatment with itraconazole was initiated. However, the patient developed renal failure, required mechanical ventilation and finally died in treatment-resistant septic shock. Post-mortem Scedosporium apiospermum was cultured from lung tissue taken during autopsy. This is the fourth case of human infection caused by Scedosporium species diagnosed in our laboratory during the last 4 years.
Collapse
Affiliation(s)
- R Horré
- Institute for Medical Microbiology and Immunology, University of Bonn, Bonn, Germany.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Choi SM, Lee DG, Kim MS, Park YH, Kim YJ, Lee S, Kim HJ, Choi JH, Yoo JH, Kim DW, Min WS, Shin WS, Kim CC. Bacteremic cellulitis caused by non-O1, non-O139 Vibrio cholerae in a patient following hematopoietic stem cell transplantation. Bone Marrow Transplant 2003; 31:1181-2. [PMID: 12796802 DOI: 10.1038/sj.bmt.1704044] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
35
|
Choi SM, Lynn JW, Lopez D, Gammel PL, Canfield PC, Bud'ko SL. Direct observation of spontaneous weak ferromagnetism in the superconductor ErNi2B2C. Phys Rev Lett 2001; 87:107001. [PMID: 11531497 DOI: 10.1103/physrevlett.87.107001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2001] [Indexed: 05/23/2023]
Abstract
Neutron measurements show that superconducting ErNi2B2C (T(C) = 11 K) develops antiferromagnetic spin density wave magnetic order (T(N) = 6 K), which squares up with decreasing temperature yielding a series of higher-order magnetic Bragg peaks with odd harmonics. Below T(WFM) = 2.3 K where magnetization indicates a net moment develops, even-order Bragg peaks develop which low field (approximately 3 Oe) polarized beam measurements show are magnetic in origin. The data directly demonstrate the existence of a net magnetization with a periodicity of 20a, confirming the microscopic coexistence of spontaneous weak ferromagnetism with superconductivity.
Collapse
Affiliation(s)
- S M Choi
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | | | | | | | | | | |
Collapse
|
36
|
Abstract
The purpose of this study is to determine the characteristic clinical features, radiologic findings, and precipitating and prognostic factors in the patients with breast cancer and with 5-Fluorouracil (5-FU)-induced leukoencephalopathy. We reviewed the medical records of six breast cancer patients who developed leukoencephalopathy after chemotherapy which included 5-FU and also evaluated thorough neurological examinations including mini-mental status examination, cerebrospinal fluid studies, brain images and brain biopsies. Six patients exhibited slowly progressing neurologic symptoms characterized by the impairment of cognitive function, abulia, ataxic gait, and/or akinetic mutism. None of the patients had any specific causes or etiologic factors for leukoencephalopathy. Brain MRI in all patients showed diffuse periventricular white matter changes in the T2-weighted MR image. Brain biopsy in Patient 1 showed fragmented axonal fiber and minimally deprived myelination with many scattered macrophages. Five patients who treated with steroids at the onset of neurological symptoms showed clinical improvement, regardless of their age, sex, the pathology and stage of breast cancer, or the total dosage of chemotherapeutic agents. We conclude that leukoencephalopathy in these cases could be attributable to 5-FU neurotoxicity and suggest that the administration of steroids might be the treatment of choice.
Collapse
Affiliation(s)
- S M Choi
- Department of Neurology, Chonnam National University Medical School, Kwangju, Korea.
| | | | | | | | | | | |
Collapse
|
37
|
Ling XS, Park SR, McClain BA, Choi SM, Dender DC, Lynn JW. Superheating and supercooling of vortex matter in a Nb single crystal: direct evidence for a phase transition at the peak effect from neutron diffraction. Phys Rev Lett 2001; 86:712-715. [PMID: 11177919 DOI: 10.1103/physrevlett.86.712] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2000] [Indexed: 05/23/2023]
Abstract
We report the first observation of a striking history dependence of the structure function of vortex matter in the peak effect regime in a Nb single crystal by using small angle neutron scattering combined with in situ magnetic susceptibility measurements. Metastable phases of vortex matter, supercooled vortex liquid and superheated vortex solid, have been identified. We interpret our results as direct structural evidence for a first-order vortex solid-liquid transition at the peak effect.
Collapse
Affiliation(s)
- X S Ling
- Department of Physics, Brown University, Providence, Rhode Island 02912, USA
| | | | | | | | | | | |
Collapse
|
38
|
Choi JH, Lee JM, Shin WS, Choi SM, Lee DG, Yoo JH, Kim DW, Lee JW, Min WS, Kim CC. Necrotizing enterocolitis: experience of 27 cases from a single Korean institution. Int J Hematol 2000; 72:358-61. [PMID: 11185995] [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: 02/19/2023]
Abstract
Necrotizing enterocolitis (NEC) can involve any site in the gastrointestinal tract and is a fatal complication of immunosuppression. To characterize NEC, clinical and radiological characteristics were analyzed. A total of 27 cases of NEC were identified from January 1993 to August 1998, and medical records were reviewed. NEC was diagnosed by clinical and radiological criteria, and other mimicking conditions were excluded. Of the NEC cases, 22 (81.5%) occurred in patients with underlying hematologic malignancy. All patients complained of abdominal pain and fever at the time of inclusion. Escherichia coli was the most common pathogen identified. The most common finding by computed tomography was single-layered diffuse bowel wall thickening with variable density. Other findings were ascites, fascial thickening, pneumatosis, and mesenteric lymphadenopathy. Of the patients, 25 were treated with antimicrobials with or without recombinant hematopoietic growth factors, and 2 were treated with surgery because of perforation and profound bleeding. Among the 12 patients who died, NEC was the direct cause of death in 7 patients. In conclusion, computed tomography is an effective tool for early diagnosis of NEC. Bowel rest, broad-spectrum antimicrobials, and recombinant hematopoietic growth factors are important aspects of treatment. Surgery should be reserved for complicated cases.
Collapse
Affiliation(s)
- J H Choi
- Department of Internal Medicine, St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Kim SH, Song KJ, Shin YK, Kim JH, Choi SM, Park KS, Baek LJ, Lee YJ, Song JW. Phylogenetic analysis of the small hydrophobic (SH) gene of mumps virus in Korea: identification of a new genotype. Microbiol Immunol 2000; 44:173-7. [PMID: 10789504 DOI: 10.1111/j.1348-0421.2000.tb02479.x] [Citation(s) in RCA: 23] [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: 11/27/2022]
Abstract
Viral RNAs extracted from fifteen mumps virus isolated from throat swab, saliva, blood, urine or CSF during mumps epidemics between 1997-1998 in Korea were amplified by reverse transcriptase-polymerase chain reaction (RT-PCR) and compared by nucleotide sequencing of the small hydrophobic (SH) gene. The deduced amino acid sequences of the SH gene were aligned with the published sequences of mumps virus isolated in different geographic areas. A comparison of the SH gene of mumps viruses in Korea indicated 96.2-100% and 91.2-100% similarity at the nucleotide and amino acid levels, respectively. Phylogenetic analysis, using the neighbor-joining method, showed that Korean mumps virus strains formed a genetically distinct monophyletic group from previously reported genotypes based on the 315-bp length nucleotide and 57 deduced amino acid sequences of the SH gene, and possibly be designated as a new genotype (I).
Collapse
Affiliation(s)
- S H Kim
- Department of Microbiology, Institute for Viral Diseases, College of Medicine, Korea University, Seoul
| | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Son SH, Choi SM, Lee YH, Choi KB, Yun SR, Kim JK, Park HJ, Kwon OW, Noh EW, Seon JH, Park YG. Large-scale growth and taxane production in cell cultures of Taxus cuspidata (Japanese yew) using a novel bioreactor. Plant Cell Rep 2000; 19:628-633. [PMID: 30754828 DOI: 10.1007/s002990050784] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A novel type of bioreactor was successfully developed for the production of taxol and its precursors by culturing cells of Taxus cuspidata (Japanese yew) on a pilot-scale. Rapidly growing cell lines were selected from callus cultures derived from immature embryos of yew. The cells were inoculated in 20-l capacity bioreactors of different types to test the growth performance. The models of small-scale bioreactors incorporated in this study included a balloon-type bubble bioreactor (BTBB), a bubble-column bioreactor (BCB), a BCB with a split-plate internal loop, a BCB with a concentric draught-tube internal loop, a BCB with a fluidized bed bioreactor, and two different models of stirred tank reactors. Among the reactors, BTBB appeared to be the most efficient in promoting cell growth. The doubling time of cell growth in BTBB was 12 days with a 30% inoculation cell density. The optimum time for medium replacement or feeding was 12-15 days after inoculation as determined by monitoring both the levels of sugars and medium conductivity. When yew tree cells were grown in different sizes (100-500-l) of BTBBs, more than 70% cell viability was recorded at the time of harvest. The growth pattern of the cells in the pilot-scale BTBB appeared to be the same as that of cells in the 20-l bioreactors. Approximately 3 mg/l of taxol and 74 mg/l total taxanes were obtained after 27 days of culture.
Collapse
Affiliation(s)
- S H Son
- Division of Biotechnology, Forestry Research Institute, Forestry Administration, Omokdong, 44-3 beongi, Kwonseon-gu, Suwon 441-350, Republic of Korea e-mail: Fax: +82-331-290-1190, , , , , , KR
| | - S M Choi
- Division of Biotechnology, Forestry Research Institute, Forestry Administration, Omokdong, 44-3 beongi, Kwonseon-gu, Suwon 441-350, Republic of Korea e-mail: Fax: +82-331-290-1190, , , , , , KR
| | - Y H Lee
- Division of Biotechnology, Forestry Research Institute, Forestry Administration, Omokdong, 44-3 beongi, Kwonseon-gu, Suwon 441-350, Republic of Korea e-mail: Fax: +82-331-290-1190, , , , , , KR
| | - K B Choi
- Division of Biotechnology, Forestry Research Institute, Forestry Administration, Omokdong, 44-3 beongi, Kwonseon-gu, Suwon 441-350, Republic of Korea e-mail: Fax: +82-331-290-1190, , , , , , KR
| | - S R Yun
- Division of Biotechnology, Forestry Research Institute, Forestry Administration, Omokdong, 44-3 beongi, Kwonseon-gu, Suwon 441-350, Republic of Korea e-mail: Fax: +82-331-290-1190, , , , , , KR
| | - J K Kim
- Division of Biotechnology, Forestry Research Institute, Forestry Administration, Omokdong, 44-3 beongi, Kwonseon-gu, Suwon 441-350, Republic of Korea e-mail: Fax: +82-331-290-1190, , , , , , KR
| | - H J Park
- Division of Biotechnology, Forestry Research Institute, Forestry Administration, Omokdong, 44-3 beongi, Kwonseon-gu, Suwon 441-350, Republic of Korea e-mail: Fax: +82-331-290-1190, , , , , , KR
| | - O W Kwon
- Division of Biotechnology, Forestry Research Institute, Forestry Administration, Omokdong, 44-3 beongi, Kwonseon-gu, Suwon 441-350, Republic of Korea e-mail: Fax: +82-331-290-1190, , , , , , KR
| | - E W Noh
- Division of Biotechnology, Forestry Research Institute, Forestry Administration, Omokdong, 44-3 beongi, Kwonseon-gu, Suwon 441-350, Republic of Korea e-mail: Fax: +82-331-290-1190, , , , , , KR
| | - J H Seon
- Department of Biological Science, University of Calgary, 2500 University Dr. N.W., Calgary, Alberta, Canada T2N1L4, , , , , , CA
| | - Y G Park
- Department of Foresty, Kyungpook National University, Taegu 702-701, Republic of Korea, , , , , , KR
| |
Collapse
|
41
|
Lee YM, Park YJ, Lee SJ, Ku Y, Han SB, Choi SM, Klokkevold PR, Chung CP. Tissue engineered bone formation using chitosan/tricalcium phosphate sponges. J Periodontol 2000; 71:410-7. [PMID: 10776928 DOI: 10.1902/jop.2000.71.3.410] [Citation(s) in RCA: 119] [Impact Index Per Article: 5.0] [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: 11/13/2022]
Abstract
BACKGROUND Chitosan is a biodegradable natural polymer that has been shown to improve wound healing. This study aimed to develop chitosan/tricalcium phosphate (TCP) sponges as tissue engineering scaffolds for bone formation by three-dimensional osteoblast culture. METHODS The sponges were prepared by freeze-drying and cross-linking a mixture of chitosan solution with TCP. Fetal rat calvarial osteoblastic cells were isolated, cultured, and seeded into the sponges. The cell-sponge constructs were cultured for 56 days. Cell proliferation, alkaline phosphatase (ALPase) activity, and calcium deposition in the cell-sponge constructs were measured at 1, 7, 14, 28, and 56 days. Histologic examination was performed with light microscopy and scanning electron microscopy. RESULTS Chitosan/TCP sponges supported the proliferation of osteoblastic cells as well as their differentiation as indicated by high ALPase activities and deposition of mineralized matrices by the cells. Light and scanning electron microscopic examination indicated that seeded osteoblastic cells were well attached to sponge matrices and proliferated in a multi-layer fashion. Small bone-like spicules were observed on the sponge matrix at 14 days. Seeded cells appeared to be embedded in the newly formed tissue matrix, which is characteristic of the osteoblast differentiation and their progression into osteocytic cells. The amount of mineralized tissue formed in the sponge at 56 days was significant. CONCLUSIONS These results suggest that the chitosan/TCP sponge is a feasible tool as a scaffolding material to grow osteoblast in a three-dimensional structure for transplantation into a site for bone regeneration.
Collapse
Affiliation(s)
- Y M Lee
- Department of Periodontology, College of Dentistry, Seoul National University, Korea
| | | | | | | | | | | | | | | |
Collapse
|
42
|
Abstract
Due to the development new of imaging devices which produce a large number of tomographic slices, advanced techniques for the evaluation of the large amount of data are required. Computer supported extraction of dynamic 3D-models of the patients anatomy from temporal series thus is highly desirable. Since the diagnostician should be able to quickly make sensible decisions based on the models, high accuracy is required within a minimum of time. We present modeling and visualization techniques that are realized within the Cardiac Station. Results for the application of these techniques to cardiac image data demonstrate their usability. Besides giving information about the patients morphology functional parameters can be derived from the data and visualized together with the model. In order to verify the model with the original image data and for the planning of real intervention interaction techniques are presented.
Collapse
Affiliation(s)
- J Behr
- Zentrum für Graphische Datenverarbeitung, Abteilung Visual Computing, Darmstadt
| | | | | | | | | | | | | | | |
Collapse
|
43
|
Sung HJ, Choi SM, Yoon Y, An KS. Tanshinone IIA, an ingredient of Salvia miltiorrhiza BUNGE, induces apoptosis in human leukemia cell lines through the activation of caspase-3. Exp Mol Med 1999; 31:174-8. [PMID: 10630370 DOI: 10.1038/emm.1999.28] [Citation(s) in RCA: 90] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Tanshinone II-A is a derivative of phenanthrene-quinone isolated from Salvia miltiorrhiza BUNGE, a traditional herbal medicine that is known to induce antiinflammatory, anti-oxidative and cytotoxic activity. We have examined cellular effects of Tanshione II-A on HL60 human promyelocytic leukemic cells and K562 human erythroleukemic cells. Tanshione II-A induced a dose- and time-dependent DNA fragmentation into the multiples of 180 bp and specific proteolytic cleavage of poly(ADP-ribose) polymerase in both cell lines. PI-staining and flow cytometry analysis of K562 cells following Tanshione II-A treatment showed an increase of the cells possessing hypodiploid DNA indicative of apoptotic state of cells. Caspase-3 activity was significantly increased during Tanshinone II-A treatment of both HL60 and K562 cells, whereas caspase-1 activity was not changed. These results suggest that Tanshione II-A induced HL60 and K562 cellular apoptosis that may be associated with the selective members of caspase family.
Collapse
MESH Headings
- Abietanes
- Antineoplastic Agents, Phytogenic/chemistry
- Antineoplastic Agents, Phytogenic/pharmacology
- Apoptosis/physiology
- Caspase 3
- Caspases/drug effects
- Caspases/metabolism
- Cell Cycle/drug effects
- DNA Fragmentation/drug effects
- Dose-Response Relationship, Drug
- Drugs, Chinese Herbal/chemistry
- Drugs, Chinese Herbal/pharmacology
- Enzyme Activation/drug effects
- HL-60 Cells/drug effects
- HL-60 Cells/metabolism
- HL-60 Cells/pathology
- Humans
- Lamiaceae/chemistry
- Leukemia/drug therapy
- Leukemia/metabolism
- Leukemia/pathology
- Leukemia, Erythroblastic, Acute/drug therapy
- Leukemia, Erythroblastic, Acute/metabolism
- Leukemia, Erythroblastic, Acute/pathology
- Phenanthrenes/chemistry
- Phenanthrenes/pharmacology
- Tumor Cells, Cultured
Collapse
Affiliation(s)
- H J Sung
- Korea Institute of Oriental Medicine, Seoul.
| | | | | | | |
Collapse
|
44
|
Lee K, Kim SY, Choi SM, Kim JS, Lee BS, Seo K, Lee YH, Kim DK. Effectiveness of prenatal ultrasonography in detecting fetal anomalies and perinatal outcome of anomalous fetuses. Yonsei Med J 1998; 39:372-82. [PMID: 9752805 DOI: 10.3349/ymj.1998.39.4.372] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [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] [Indexed: 11/27/2022] Open
Abstract
A retrospective study was performed over a 5-year period (1990-94) to evaluate the effectiveness of prenatal ultrasonography in terms of sensitivity, specificity, and predictive values in detecting fetal anomalies by comparing prenatal ultrasonic results with anomalies found in neonates and the perinatal outcome of anomalous fetuses. Minor congenital anomalies as listed and defined in the Eurocat Register were excluded. From a total of 5544 singletons, 4819 had at least one ultrasound scan (87%), of which 3004 at low risk and 1815 (38%) at high risk for anomalies had routine screening (RS) and indicated scanning (IS), respectively. A total of 136 fetuses were structurally abnormal (2.82%, RS and IS: 0.77% and 6.23%) and 200 major anomalies (RS and IS: 37 and 163) were recorded. The overall sensitivity of the ultrasound test was 78.7% (RS and IS: 34.8% and 87.6%, P < 0.01) for abnormal fetuses and 58.0% (RS and IS: 29.7% and 64.4%, P < 0.01) for anomalies. The overall specificity was 99.9% and the positive and negative predictive values were 97.3% and 99.4%, respectively; these values did not differ significantly between the two groups. The sensitivity of ultrasound for the detection of abnormal fetuses before 24 weeks was 22.8% (RS and IS: 13.0% and 24.8%) which was associated with a 61% (25/41) termination rate (RS and IS: 25% and 75.9%, P < 0.01) and a 24.4% (10/41) postnatal survival rate (RS and IS: 41.7% and 17.2%). The overall survival rate following pre- and postnatal correction of anomalies was 44.9% (RS and IS: 60.9% and 41.6%). For the detection of fetal anomalies anatomic ultrasound scanning is necessary during pregnancy, irrespective of pregnancy condition. Early detection of fetal anomalies could offer the option of pregnancy termination.
Collapse
Affiliation(s)
- K Lee
- Department of Obstetrics and Gynecology, Yongdong Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | | | | | | | | | | | | | | |
Collapse
|
45
|
Park TK, Lee JP, Kim SN, Choi SM, Kudelka AP, Kavanagh JJ. Interferon-alpha 2a, 13-cis-retinoic acid and radiotherapy for locally advanced carcinoma of the cervix: a pilot study. EUR J GYNAECOL ONCOL 1998; 19:35-8. [PMID: 9476056] [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: 02/06/2023]
Abstract
UNLABELLED Standard treatment with radiotherapy for locally advanced cancer of the uterine cervix has a response rate of less than 50%. Recently, concurrent chemotherapy with radiotherapy was introduced into the clinic but is value remains controversial. Interferon and retinoic acid possess antiproliferative, immunomodulatory, and antineoplastic activities. The combination of interferon and retinoic acid has significant activity in patients with squamous cell carcinoma. These compounds may also potentiate radiation cytotoxicity. This pilot study aimed to assess the clinical efficacy and tolerability of the combination of interferon-alpha 2a, 13-cis-retinoic acid and radiotherapy. Patients with locally advanced carcinoma of the cervix were treated at Severance Hospital, Yonsei University College of Medicine. Fifteen patients received the combination of interferon-alpha 2a, 13-cis-retinoic acid and radiotherapy. Twelve patients treated in previous years with comparable radiotherapy and concurrent chemotherapy served as historical controls. RESULTS (1) Interferon-alpha 2a, 13-cis-retinoic acid and radiotherapy resulted in a 47% response rate (33% complete remissions) while patients treated with concurrent chemoradiotherapy had a 42% response rate (17% complete remissions) (2). Major toxicity of interferon-alpha 2a, 13-cis-retinoic acid and radiotherapy was fever (60%). There was no grade 3 or 4 toxicity. CONCLUSION Systemic interferon-alpha 2a, 13-cis-retinoic acid and radiotherapy is an active and tolerable therapy for locally advanced cervical cancer. Randomized studies are required to define the role of bioradiotherapy in the treatment of advanced cervical cancer.
Collapse
Affiliation(s)
- T K Park
- Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Seoul, Korea
| | | | | | | | | | | |
Collapse
|
46
|
Abstract
A number of segmentation algorithms have been developed, but those algorithms are not effective on volume reconstruction because they are limited to operating only on two-dimensional (2-D) images. In this paper, we propose the volumetric object reconstruction method using the three-dimensional Markov random field (3D-MRF) model-based segmentation. The 3D-MRF model is known to be one of efficient ways to model spatial contextual information. The method is compared with the 2-D region growing scheme under three types of interpolation. The results show that the proposed method is better in the aspect of image quality than other methods.
Collapse
Affiliation(s)
- S M Choi
- Department of Computer Science and Engineering, Ewha Womans University, Seoul, Korea
| | | | | | | |
Collapse
|
47
|
Abstract
Retinoids are strong inhibitors of epithelial cancer promotion and progression in experimental carcinogenesis. Recently, therapeutic trials of retinoids have demonstrated activities in cervical cancer and precancerous lesion of cervix. Our purpose was to determine whether additional administration of 13-cis-retinoic acid would improve the treatment effect of neoadjuvant chemotherapy in patients with squamous cell carcinoma of the cervix. From January 1994 through January 1995, 40 patients with invasive cervical cancer were enrolled in this prospective study and randomized into the two groups. Group 1 had neoadjuvant chemotherapy alone and group 2 had neoadjuvant chemotherapy plus 13-cis-retinoic acid (RA) at a dosage of 1 mg/kg/day for 1 month. Patients in group 1 and group 2 were similar with respect to age, parity, clinical stage, and histological subtype. Therapeutic responses were compared using Fisher's exact test, Mann-Whitney test, and Wilcoxon signed-rank test. RA increased the complete response rate of neoadjuvant chemotherapy from 0% in group 1 to 5% in group 2. However, a difference of overall clinical response rate between the two groups was not evident. The drug toxicities in group 1 and group 2 included anemia in 30.0% and 23.7%, leukopenia in 6.7% and 15.2%, and hepatotoxicity in 6.7% and 6.8%, respectively. More frequent incidence of mucocutaneous side effects was seen in group 2 than group 1, but these side effects were mild and reversible. The clinical response rate achieved in this trial indicates that the combination of 13-cis-retinoic acid and neoadjuvant chemotherapy, at least when used on the schedule reported herein, is not superior to treatment of neoadjuvant chemotherapy alone for patients with squamous cell carcinoma of the cervix. However, a single patient achieved a complete response on this therapy, and the impact of such a treatment on survival needs to be explored.
Collapse
Affiliation(s)
- J W Kim
- Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Seoul, South Korea
| | | | | | | | | |
Collapse
|
48
|
Abstract
We report 45 pediatric cases of Yersinia pseudotuberculosis infection confirmed by stool culture between May 1993 and June 1994. In 41 (91.1%) cases there had been contact with untreated well or mountain water. Y. pseudotuberculosis was also isolated from 4 samples of mountain spring water thought to be the sources of infection. During the course of the illness, acute renal failure (ARF) developed in 6 patients (13.6%). The age distribution of the ARF group (12.3 +/- 1.2 years) was significantly different from the non-ARF group (8.0 +/- 3.2 years). The serogroups of Y. pseudotuberculosis isolates from stool samples were 5 (n = 30) and 4 (n = 15). Isolates from the water samples were all serogroup 5. The main symptoms of both groups were fever, rash, abdominal pain, and vomiting. ARF developed between the 2nd and 14th days (mean 6 days) after the onset of fever, and oliguria (< 400 ml/m2 per day) developed in 3 patients (3/6, 50%) immediately after their fevers had subsided. ARF underwent a benign course, with complete recovery within a maximum of 4 weeks (mean 10.2 days), with 1 exceptional patient requiring hemodialysis. Renal biopsy showed evidence of tubulointerstitial nephritis. Y. pseudotuberculosis should be included as one of the causes of acute interstitial nephritis causing ARF in children, especially when the children have histories of drinking untreated water in endemic areas.
Collapse
Affiliation(s)
- J W Koo
- Department of Pediatrics, College of Medicine, Inje University, Sanggye Paik Hospital, Seoul, Korea
| | | | | | | | | | | | | |
Collapse
|
49
|
Abstract
The efficacy of hydrocolloid occlusive dressing technique was compared with that of the conventional wet-to-dry gauze dressing technique in decubitus ulcer of stage I and II. Forty-four patients were randomly divided into two treatment groups and each received treatment according to the two different protocols. As a result, 80.8% of the hydrocolloid occlusive dressing group (group 1) and 77.8% of the conventional wet-to-dry gauze dressing group (group 2) healed completely with no statistically significant difference between the two groups. However, the time required for complete healing was shorter in group 1 with 18.9 days compared to 24.3 days in group 2. Ulcer healing speed was also slightly faster in group 1 with 9.1 mm2/day compared to 7.9 mm2/day for group 2. Average treatment time spent by a medical staff member was significantly shorter in group 1 with 20.4 minutes/day compared to 2017 minutes/day in group 2. The hospital cost of the ulcer treatment was higher in group 2 compared to group 1 even without taking into consideration the medical personnel's labor cost. These results indicate that the hydrocolloid occlusive dressing technique offers less time consuming and less expensive method of treatment compared to the conventional technique in stage I and II decubitus ulcers.
Collapse
Affiliation(s)
- Y C Kim
- Research Institute of Rehabilitation Medicine, Yonsei University College of Medicine, Seoul, Korea
| | | | | | | | | | | |
Collapse
|
50
|
Yim CY, Lee CW, Choi SM, Park SS, Lee SJ, Kim JH, Song JS, Yoo WH, Kwak JY, Sohn MH. Effects of nitric oxide (NO) synthesis inhibition on antitumor responses during interleukin-2 (IL-2) treatment of mice. Korean J Intern Med 1996; 11:93-100. [PMID: 8854644 PMCID: PMC4532021 DOI: 10.3904/kjim.1996.11.2.93] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
OBJECTIVES To evaluate if L-arginine: NO pathway is activated in tumor tissues during IL-2 therapy and to evaluate whether IL-2 induced NO synthesis represents an antitumor effector mechanism or an inhibitory factor against therapeutic effects of IL-2. METHODS Four groups [untreated control, NG-monomethyl-L-arginine (MLA) therapy only, IL-2 therapy only, IL-2/MLA therapy groups] of BALB/c mice were injected intraperitoneally with 2 x 10(8) Meth A tumor cells on day 0. MLA was administered subcutaneously with Alzet continuous infusion pumps on day 2. IL-2 therapy (180,000 IU s.c. every 12h for 5 days) was started on day 3. NO production within ascites tumors was assessed by measuring nitrite concentrations in cultures of ascites cells harvested on day 8. Survival and the rate of body weight increment of the mice were measured to evaluate therapeutic responses. Daily urinary nitrate excretion was monitored to demonstrate the effectiveness of MLA in inhibiting NO synthesis. RESULTS Nitrite production in supernatants of Meth A ascites cell cultures was 63 +/- 14 microM in IL-2 treated mice and 3.2 +/- 1.5 microM in untreated controls (p < 0.001). MLA prevented the IL-2 therapy induced increase in nitrite production. IL-2 therapy did not decrease the rate of body weight increment and marginally prolonged mean survival to 18.2 days, compared to 16.6 days in control mice (p = 0.255). MLA administration decreased the rate of body weight increment and prolonged mean survival of IL-2 treated mice (21.8 days, p = 0.001 versus IL-2 alone). Interestingly, the MLA treatment increased the rate of body weight increment and diminished the survival of control mice to 11.6 days (p = 0.003). MLA administration via Alzet continuous infusion pumps achieved approximately 60% suppression of urinary nitrate excretion by control mice. Subcutaneous IL-2 treatment strongly induced nitric oxide synthesis (up to 3.5 mumoles of urinary nitrate/ mouse/day). MLA also effectively suppressed IL-2 induced NO production. CONCLUSION L-arginine: NO pathway can be activated in malignant ascites by IL-2 therapy and NO synthesis functions as an inhibitory mechanism against IL-2 induced anti-tumor effects.
Collapse
Affiliation(s)
- C Y Yim
- Department of Internal medicine, Chonbuk National University Medical School, Chonju, Korea
| | | | | | | | | | | | | | | | | | | |
Collapse
|