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Choi J, Yang MJ, Woo K, Park SH, Lee D, Kim S. Bidirectional crosstalk between cancer cells and cancer-associated fibroblasts in mixed organoid system elicits transcriptomic characteristics of pancreatic cancer with potential therapeutic vulnerabilities. Clin Transl Med 2024; 14:e1597. [PMID: 38385855 PMCID: PMC10883236 DOI: 10.1002/ctm2.1597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 01/31/2024] [Accepted: 02/07/2024] [Indexed: 02/23/2024] Open
Affiliation(s)
- Jae‐Il Choi
- Department of PathologyAjou University School of MedicineSuwonSouth Korea
- Department of Biomedical SciencesAjou University Graduate School of MedicineSuwonSouth Korea
| | - Min Jae Yang
- Department of Internal MedicineAjou University School of MedicineSuwonSouth Korea
| | - Kyoung‐Jin Woo
- Department of PathologyAjou University School of MedicineSuwonSouth Korea
- Department of Biomedical SciencesAjou University Graduate School of MedicineSuwonSouth Korea
| | - So Hyun Park
- Department of PathologyAjou University School of MedicineSuwonSouth Korea
- Department of Biomedical SciencesAjou University Graduate School of MedicineSuwonSouth Korea
| | - Dakeun Lee
- Department of PathologyAjou University School of MedicineSuwonSouth Korea
- Department of Biomedical SciencesAjou University Graduate School of MedicineSuwonSouth Korea
| | - Seokhwi Kim
- Department of PathologyAjou University School of MedicineSuwonSouth Korea
- Department of Biomedical SciencesAjou University Graduate School of MedicineSuwonSouth Korea
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Van Tiggelen H, LeBlanc K, Campbell K, Woo K, Baranoski S, Chang Y, Dunk A, Gloeckner M, Hevia H, Holloway S, Idensohn P, Karadağ A, Koren E, Kottner J, Langemo D, Ousey K, Pokorná A, Romanelli M, Santos V, Smet S, Tariq G, Van den Bussche K, Van Hecke A, Verhaeghe S, Vuagnat H, Williams A, Beeckman D. Standardizing the classification of skin tears: validity and reliability testing of the International Skin Tear Advisory Panel Classification System in 44 countries. Br J Dermatol 2020; 183:146-154. [PMID: 31605618 PMCID: PMC7384145 DOI: 10.1111/bjd.18604] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/06/2019] [Indexed: 01/21/2023]
Abstract
BACKGROUND Skin tears are acute wounds that are frequently misdiagnosed and under-reported. A standardized and globally adopted skin tear classification system with supporting evidence for diagnostic validity and reliability is required to allow assessment and reporting in a consistent way. OBJECTIVES To measure the validity and reliability of the International Skin Tear Advisory Panel (ISTAP) Classification System internationally. METHODS A multicountry study was set up to validate the content of the ISTAP Classification System through expert consultation in a two-round Delphi procedure involving 17 experts from 11 countries. An online survey including 24 skin tear photographs was conducted in a convenience sample of 1601 healthcare professionals from 44 countries to measure diagnostic accuracy, agreement, inter-rater reliability and intrarater reliability of the instrument. RESULTS A definition for the concept of a 'skin flap' in the area of skin tears was developed and added to the initial ISTAP Classification System consisting of three skin tear types. The overall agreement with the reference standard was 0·79 [95% confidence interval (CI) 0·79-0·80] and sensitivity ranged from 0·74 (95% CI 0·73-0·75) to 0·88 (95% CI 0·87-0·88). The inter-rater reliability was 0·57 (95% CI 0·57-0·57). The Cohen's Kappa measuring intrarater reliability was 0·74 (95% CI 0·73-0·75). CONCLUSIONS The ISTAP Classification System is supported by evidence for validity and reliability. The ISTAP Classification System should be used for systematic assessment and reporting of skin tears in clinical practice and research globally. What's already known about this topic? Skin tears are common acute wounds that are misdiagnosed and under-reported too often. A skin tear classification system is needed to standardize documentation and description for clinical practice, audit and research. What does this study add? The International Skin Tear Advisory Panel Classification System was psychometrically tested in 1601 healthcare professionals from 44 countries. Diagnostic accuracy was high when differentiating between type 1, 2 and 3 skin tears using a set of validated photographs.
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Kim B, Shin H, Kim W, Kim H, Cho Y, Yoon H, Baek J, Woo K, Lee Y, Ryoo H. PIN1 Attenuation Improves Midface Hypoplasia in a Mouse Model of Apert Syndrome. J Dent Res 2019; 99:223-232. [PMID: 31869252 DOI: 10.1177/0022034519893656] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Premature fusion of the cranial suture and midface hypoplasia are common features of syndromic craniosynostosis caused by mutations in the FGFR2 gene. The only treatment for this condition involves a series of risky surgical procedures designed to correct defects in the craniofacial bones, which must be performed until brain growth has been completed. Several pharmacologic interventions directed at FGFR2 downstream signaling have been tested as potential treatments for premature coronal suture fusion in a mouse model of Apert syndrome. However, there are no published studies that have targeted for the pharmacologic treatment of midface hypoplasia. We used Fgfr2S252W/+ knock-in mice as a model of Apert syndrome and morphometric analyses to identify causal hypoplastic sites in the midface region. Three-dimensional geometric and linear analyses of Fgfr2S252W/+ mice at postnatal day 0 demonstrated distinct morphologic variance. The premature fusion of anterior facial bones, such as the maxilla, nasal, and frontal bones, rather than the cranium or cranial base, is the main contributing factor toward the anterior-posterior skull length shortening. The cranial base of the mouse model had a noticeable downward slant around the intersphenoid synchondrosis, which is related to distortion of the airway. Within a skull, the facial shape variance was highly correlated with the cranial base angle change along Fgfr2 S252W mutation-induced craniofacial anomalies. The inhibition of an FGFR2 downstream signaling enzyme, PIN1, via genetic knockdown or use of a PIN1 inhibitor, juglone, attenuated the aforementioned deformities in a mouse model of Apert syndrome. Overall, these results indicate that FGFR2 signaling is a key contributor toward abnormal anterior-posterior dimensional growth in the midface region. Our study suggests a novel therapeutic option for the prevention of craniofacial malformations induced by mutations in the FGFR2 gene.
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Affiliation(s)
- B Kim
- Department of Molecular Genetics and Dental Pharmacology, Seoul National University, Seoul, Republic of Korea
| | - H Shin
- Department of Molecular Genetics and Dental Pharmacology, Seoul National University, Seoul, Republic of Korea
| | - W Kim
- Department of Molecular Genetics and Dental Pharmacology, Seoul National University, Seoul, Republic of Korea
| | - H Kim
- Department of Molecular Genetics and Dental Pharmacology, Seoul National University, Seoul, Republic of Korea
| | - Y Cho
- Department of Molecular Genetics and Dental Pharmacology, Seoul National University, Seoul, Republic of Korea.,Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, Republic of Korea
| | - H Yoon
- Department of Molecular Genetics and Dental Pharmacology, Seoul National University, Seoul, Republic of Korea
| | - J Baek
- Department of Molecular Genetics and Dental Pharmacology, Seoul National University, Seoul, Republic of Korea
| | - K Woo
- Department of Molecular Genetics and Dental Pharmacology, Seoul National University, Seoul, Republic of Korea
| | - Y Lee
- Department of Molecular Genetics and Dental Pharmacology, Seoul National University, Seoul, Republic of Korea
| | - H Ryoo
- Department of Molecular Genetics and Dental Pharmacology, Seoul National University, Seoul, Republic of Korea
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Kuczmarska-Haas A, Lee A, Macomber M, Woo K, Freese C, Morris Z. International Survey on the Use of Complementary and Alternative Medicines for Common Toxicities of Radiation Therapy. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.07.1958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Beeckman D, Van den Bussche K, Alves P, Arnold Long M, Beele H, Ciprandi G, Coyer F, de Groot T, De Meyer D, Deschepper E, Dunk A, Fourie A, García-Molina P, Gray M, Iblasi A, Jelnes R, Johansen E, Karadağ A, Leblanc K, Kis Dadara Z, Meaume S, Pokorna A, Romanelli M, Ruppert S, Schoonhoven L, Smet S, Smith C, Steininger A, Stockmayr M, Van Damme N, Voegeli D, Van Hecke A, Verhaeghe S, Woo K, Kottner J. Towards an international language for incontinence-associated dermatitis (IAD): design and evaluation of psychometric properties of the Ghent Global IAD Categorization Tool (GLOBIAD) in 30 countries. Br J Dermatol 2018. [DOI: 10.1111/bjd.16754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Beeckman D, Van den Bussche K, Alves P, Arnold Long M, Beelev H, Ciprandi G, Coyer F, de Groot T, De Meyer D, Deschepper E, Dunk A, Fourie A, García-Molina P, Gray M, Iblasi A, Jelnes R, Johansen E, Karadag A, Leblanc K, Kis Dadara Z, Meaume S, Pokorna A, Romanelli M, Ruppert S, Schoonhoven L, Smet S, Smith C, Steininger A, Stockmayr M, Van Damme N, Voegeli D, Van Hecke A, Verhaeghe S, Woo K, Kottner J. 建立失禁相关性皮炎(IAD)相关国际通用术语:在30个国家/地区进行根特全球(IAD)分类工具(GLOBIAD)心理测量特性的设计和评估. Br J Dermatol 2018. [DOI: 10.1111/bjd.16766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Beeckman D, Van den Bussche K, Alves P, Arnold Long MC, Beele H, Ciprandi G, Coyer F, de Groot T, De Meyer D, Deschepper E, Dunk AM, Fourie A, García-Molina P, Gray M, Iblasi A, Jelnes R, Johansen E, Karadağ A, Leblanc K, Kis Dadara Z, Meaume S, Pokorna A, Romanelli M, Ruppert S, Schoonhoven L, Smet S, Smith C, Steininger A, Stockmayr M, Van Damme N, Voegeli D, Van Hecke A, Verhaeghe S, Woo K, Kottner J. Towards an international language for incontinence-associated dermatitis (IAD): design and evaluation of psychometric properties of the Ghent Global IAD Categorization Tool (GLOBIAD) in 30 countries. Br J Dermatol 2018; 178:1331-1340. [PMID: 29315488 DOI: 10.1111/bjd.16327] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/01/2018] [Indexed: 11/27/2022]
Abstract
BACKGROUND Incontinence-associated dermatitis (IAD) is a specific type of irritant contact dermatitis with different severity levels. An internationally accepted instrument to assess the severity of IAD in adults, with established diagnostic accuracy, agreement and reliability, is needed to support clinical practice and research. OBJECTIVES To design the Ghent Global IAD Categorization Tool (GLOBIAD) and evaluate its psychometric properties. METHODS The design was based on expert consultation using a three-round Delphi procedure with 34 experts from 13 countries. The instrument was tested using IAD photographs, which reflected different severity levels, in a sample of 823 healthcare professionals from 30 countries. Measures for diagnostic accuracy (sensitivity and specificity), agreement, interrater reliability (multirater Fleiss kappa) and intrarater reliability (Cohen's kappa) were assessed. RESULTS The GLOBIAD consists of two categories based on the presence of persistent redness (category 1) and skin loss (category 2), both of which are subdivided based on the presence of clinical signs of infection. The agreement for differentiating between category 1 and category 2 was 0·86 [95% confidence interval (CI) 0·86-0·87], with a sensitivity of 90% and a specificity of 84%. The overall agreement was 0·55 (95% CI 0·55-0·56). The Fleiss kappa for differentiating between category 1 and category 2 was 0·65 (95% CI 0·65-0·65). The overall Fleiss kappa was 0·41 (95% CI 0·41-0·41). The Cohen's kappa for differentiating between category 1 and category 2 was 0·76 (95% CI 0·75-0·77). The overall Cohen's kappa was 0·61 (95% CI 0·59-0·62). CONCLUSIONS The development of the GLOBIAD is a major step towards a better systematic assessment of IAD in clinical practice and research worldwide. However, further validation is needed.
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Affiliation(s)
- D Beeckman
- University Centre for Nursing and Midwifery, Department of Public Health, Ghent University, Ghent, Belgium.,School of Nursing and Midwifery, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - K Van den Bussche
- University Centre for Nursing and Midwifery, Department of Public Health, Ghent University, Ghent, Belgium
| | - P Alves
- Centre for Interdisciplinary Research in Health, Institute of Health Sciences, Catholic University of Portugal, Oporto, Portugal
| | - M C Arnold Long
- Department of Nursing, Roper Hospital, Charleston, SC, U.S.A
| | - H Beele
- Department of Dermatology, Ghent University Hospital, Ghent, Belgium
| | - G Ciprandi
- Department of Pediatric Surgery, Division of Plastic and Maxillofacial Surgery, Bambino Gesu' Children's Hospital, Research Institute, Rome, Italy
| | - F Coyer
- Intensive Care Services, Royal Brisbane and Women's Hospital and School of Nursing, Queensland University of Technology, Brisbane, Australia
| | - T de Groot
- Wond Expertise Centrum, Lange Land Ziekenhuis, Zoetermeer, the Netherlands
| | - D De Meyer
- University Centre for Nursing and Midwifery, Department of Public Health, Ghent University, Ghent, Belgium
| | - E Deschepper
- University Centre for Nursing and Midwifery, Department of Public Health, Ghent University, Ghent, Belgium
| | - A M Dunk
- Tissue Viability Unit, Canberra Hospital, ACT Health, Canberra, Australia
| | - A Fourie
- Scientific Affairs & Education Manager, 3M (Critical and Chronic Care Solutions), Johannesburg, South Africa
| | - P García-Molina
- Department of Nursing, University of Valencia, Valencia, Spain
| | - M Gray
- Department of Urology, University of Virginia, Charlottesville, VA, U.S.A
| | - A Iblasi
- Wound Care, King Saud Medical City (KSMC), Riyadh, Saudi Arabia
| | - R Jelnes
- Wound Clinic, Sygehus Sonderjylland, Sonderborg, Denmark
| | - E Johansen
- University College of Southeast Norway, Department of Nursing and Health Sciences, Faculty of Health and Social Sciences, Drammen, Norway
| | - A Karadağ
- School of Nursing, Koc University, Istanbul, Turkey
| | - K Leblanc
- School of Nursing, Faculty of Health Sciences, Queen's University, Kingston, Canada
| | - Z Kis Dadara
- Development of Care, Barmherzige Brüder Austria, Vienna, Austria
| | - S Meaume
- Geriatric and Wound Healing Department, APHP, Hôpital Rothschild, Paris, France
| | - A Pokorna
- Department of Nursing, Masaryk University, Faculty of Medicine, Brno, Czech Republic
| | - M Romanelli
- Department of Dermatology, University of Pisa, Pisa, Italy
| | - S Ruppert
- Department of Medicine II, Vienna General Hospital, Vienna, Austria
| | - L Schoonhoven
- Faculty of Health Sciences, University of Southampton, Southampton, U.K.,National Institute for Health Research Collaboration for Leadership in Applied Health Research and Care (NIHR CLAHRC Wessex), University of Southampton, Southampton, U.K.,Radboud University Medical Center, Radboud Institute for Health Sciences, Scientific Institute for Quality of Healthcare, Nijmegen, the Netherlands
| | - S Smet
- Wound Care Center, Ghent University Hospital, Ghent, Belgium
| | - C Smith
- Wound Ostomy Clinic, Marion General Hospital, Marion, IN, U.S.A
| | - A Steininger
- Private Universität für Medizinische Informatik und Technik (UMIT) und Pflegeakademie der Barmherzigen Brüder Wien Pflegewissenschaft und Gerontologie, Vienna, Austria
| | - M Stockmayr
- Department of Surgery, Vienna General Hospital, Vienna, Austria
| | - N Van Damme
- University Centre for Nursing and Midwifery, Department of Public Health, Ghent University, Ghent, Belgium
| | - D Voegeli
- Faculty of Health Sciences, University of Southampton, Southampton, U.K
| | - A Van Hecke
- University Centre for Nursing and Midwifery, Department of Public Health, Ghent University, Ghent, Belgium
| | - S Verhaeghe
- University Centre for Nursing and Midwifery, Department of Public Health, Ghent University, Ghent, Belgium
| | - K Woo
- Department of Nursing, Queen's University, Kingston, Canada
| | - J Kottner
- University Centre for Nursing and Midwifery, Department of Public Health, Ghent University, Ghent, Belgium.,Clinical Research Center for Hair and Skin Science, Department of Dermatology and Allergy, Charité-Universtitätsmedizin Berlin, Berlin, Germany
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Shang WL, Betti R, Hu SX, Woo K, Hao L, Ren C, Christopherson AR, Bose A, Theobald W. Electron Shock Ignition of Inertial Fusion Targets. Phys Rev Lett 2017; 119:195001. [PMID: 29219482 DOI: 10.1103/physrevlett.119.195001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Indexed: 06/07/2023]
Abstract
It is shown that inertial confinement fusion targets designed with low implosion velocities can be shock-ignited using laser-plasma interaction generated hot electrons (hot-e's) to obtain high energy gains. These designs are robust to multimode asymmetries and are predicted to ignite even for significantly distorted implosions. Electron shock ignition requires tens of kilojoules of hot-e's which can be produced only at a large laser facility like the National Ignition Facility, with the laser-to-hot-e conversion efficiency greater than 10% at laser intensities ∼10^{16} W/cm^{2}.
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Affiliation(s)
- W L Shang
- Fusion Science Center and Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
- Departments of Mechanical Engineering and Physics and Astronomy, University of Rochester, Rochester, New York 14623, USA
| | - R Betti
- Fusion Science Center and Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
- Departments of Mechanical Engineering and Physics and Astronomy, University of Rochester, Rochester, New York 14623, USA
| | - S X Hu
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - K Woo
- Fusion Science Center and Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
- Departments of Mechanical Engineering and Physics and Astronomy, University of Rochester, Rochester, New York 14623, USA
| | - L Hao
- Departments of Mechanical Engineering and Physics and Astronomy, University of Rochester, Rochester, New York 14623, USA
| | - C Ren
- Departments of Mechanical Engineering and Physics and Astronomy, University of Rochester, Rochester, New York 14623, USA
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - A R Christopherson
- Fusion Science Center and Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
- Departments of Mechanical Engineering and Physics and Astronomy, University of Rochester, Rochester, New York 14623, USA
| | - A Bose
- Fusion Science Center and Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
- Departments of Mechanical Engineering and Physics and Astronomy, University of Rochester, Rochester, New York 14623, USA
| | - W Theobald
- Fusion Science Center and Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
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Spencer R, Alexander V, Eickhoff J, Woo K, Costanzo E, Marx N, Rose S. A digital media diversion improves mood in patients receiving chemotherapy for recurrent gynecologic malignancies: Results of a randomized clinical trial. Gynecol Oncol 2017. [DOI: 10.1016/j.ygyno.2017.03.468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Cho Y, Kim B, Bae H, Kim W, Baek J, Woo K, Lee G, Seol Y, Lee Y, Ku Y, Rhyu I, Ryoo H. Direct Gingival Fibroblast/Osteoblast Transdifferentiation via Epigenetics. J Dent Res 2017; 96:555-561. [PMID: 28081379 DOI: 10.1177/0022034516686745] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Alveolar bone resorption caused by trauma or periodontal diseases has represented a challenge for both dental clinicians and researchers. In this study, we evaluate the osteogenic potential of human gingival fibroblasts (HGFs) through a direct transdifferentiation from HGFs to functional osteoblasts via epigenetic modification and osteogenic signaling with bone morphogenetic protein 2 (BMP2) in vitro and in vivo. HGF treatment with 5-aza-2'-deoxycytidine (5-aza-dC) induced demethylation in the hypermethylated CpG islands of the osteogenic lineage marker genes RUNX2 and ALP, and subsequent BMP2 treatment successfully drove the fibroblasts to the osteoblasts' lineage. Cell morphological changes viewed under microscopy and alkaline phosphatase (ALP) and alizarin red S (ARS) staining confirmed the osteoblastic change mediated by epigenetic modification as did real-time polymerase chain reaction (PCR), methylation-specific PCR (MSP), and chromatin immunoprecipitation (ChIP) assay, which demonstrated the altered methylation patterns in the RUNX2 and ALP promoter regions and their effect on gene expression. Furthermore, micro-computed tomography (CT) analysis of in vivo mouse cell transplantation experiments showed high-density signal in the epigenetically modified HGF group; in addition, a significant amount of bone formation was observed in the transplanted material using hematoxylin and eosin (H&E) staining as well. Collectively, our results indicate that epigenetic modification permits the direct programming of HGFs into functional osteoblasts, suggesting that this approach might open a novel therapeutic avenue in alveolar bone regeneration.
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Affiliation(s)
- Y Cho
- 1 Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea.,2 Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - B Kim
- 1 Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - H Bae
- 1 Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - W Kim
- 1 Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - J Baek
- 1 Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - K Woo
- 1 Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - G Lee
- 1 Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - Y Seol
- 2 Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - Y Lee
- 2 Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - Y Ku
- 2 Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - I Rhyu
- 2 Department of Periodontology, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
| | - H Ryoo
- 1 Department of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, Seoul National University, Seoul, South Korea
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Gosper M, McNeill M, Phillips R, Preston G, Woo K, Green D. Web-based lecture technologies and learning and teaching: a study of change in four Australian universities. ACTA ACUST UNITED AC 2016. [DOI: 10.1080/09687769.2010.529111] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- M. Gosper
- Learning and Teaching CentreMacquarie University SydneyAustralia
| | - M. McNeill
- Learning and Teaching CentreMacquarie University SydneyAustralia
| | - R. Phillips
- Teaching and Learning CentreMurdoch University PerthAustralia
| | - G. Preston
- School of EducationUniversity of Newcastle NewcastleAustralia
| | - K. Woo
- Learning and Teaching CentreMacquarie University SydneyAustralia
| | - D. Green
- Staff Development & Training UnitFlinders University AdelaideAustralia
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Zumsteg Z, Spratt D, Pei X, Zhang Z, Woo K, Kollmeier M, McBride S, Sandler H, Zelefsky M. Redefining Unfavorable Risk Prostate Cancer: A Novel Risk Stratification Paradigm for Enhanced Outcome Prediction Via Harmonization and Unification of Risk Stratification Criteria. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Blanchette A, Demers M, Woo K, Solomon J, Shah A, Mullick A, Levin M. Attitudes of clinicians towards spasticity assessment. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Litvak A, Iyriboz T, Zakowski M, Woo K, Krug L, Rudin C, Pietanza C. Clinical Characteristics and Outcomes for 61 Patients With Metastatic Pulmonary Carcinoids. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.08.196] [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: 12/01/2022]
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Hellmann M, Creelan B, Woo K, Sima C, Iams W, Antonia S, Horn L, Brahmer J, Gettinger S, Harbison C, Rizvi N. Smoking History and Response to Nivolumab in Patients with Advanced Nsclcs. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu349.8] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Litvak A, Iyriboz T, Zakowski M, Woo K, Krug L, Rudin C, Pietanza M. Clinical Characteristics and Outcomes for 61 Patients with Metastatic Pulmonary Carcinoids. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu357.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Naidoo J, Santos-Zabala M, Iyriboz T, Woo K, Sima C, Fiore J, Kris M, Veach S, Riely G, Iqbal A, Smith-Marrone S, Sarkaria I, Krug L, Rudin C, Rekhtman N, Pietanza M. Large Cell Neuroendocrine Carcinomas (Lcnec) of the Lung: Pathologic Features, Treatment and Outcomes. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu345.11] [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: 11/14/2022] Open
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Wu A, Gillis A, Foster A, Woo K, Zhang Z, Gelblum D, Downey R, Rosenzweig K, Ong L, Perez C, Pietanza M, Krug L, Rimner A. Should All Limited-Stage Small Cell Lung Cancer Be Treated Alike? Impact of AJCC Stage on Brain Metastasis, Survival, and Patterns of Failure. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.210] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Ioannou K, Bennett M, Ignaszewski A, Tung S, Krahn A, Wilson-McManus J, Dai D, Assadian S, Hollander Z, McManus B, Park H, Woo K, Kang H, Ng R. Ensemble Analysis Using Blood-Based Biomarkers, Ambulatory Electrocardiography and Clinical Variables Predicts 30 Day Hospitalization in Patients With Heart Failure. Can J Cardiol 2013. [DOI: 10.1016/j.cjca.2013.07.320] [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: 10/26/2022] Open
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Yanchar NL, Woo K, Brennan M, Palmer C, Ee M, Crameri J, Sweeney B. Chest X-ray as a screening tool for blunt thoracic trauma in children. Scand J Trauma Resusc Emerg Med 2013. [PMCID: PMC3665529 DOI: 10.1186/1757-7241-21-s1-s8] [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: 11/18/2022] Open
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Leitman I, Suzuki K, Wengrofsky A, Menashe E, Poplawski M, Woo K, Geller C, Zeifer B, Patton B, Bernik T. Early Recognition and Triage of Acute Thoracic Aortic Dissection and Aneurysm: Impossible Challenge or Achievable Task? J Surg Res 2013. [DOI: 10.1016/j.jss.2012.10.561] [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: 10/27/2022]
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Woo K, Garg J, Hye R. Contemporary Results for Carotid Endarterectomy for Asymptomatic Carotid Stenosis. J Vasc Surg 2011. [DOI: 10.1016/j.jvs.2011.01.018] [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: 10/18/2022]
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Ostrow B, Sibbald R, Woo K, Rambaran M. Sixty second screening identifies persons at risk for diabetic foot ulcers. Can J Diabetes 2009. [DOI: 10.1016/s1499-2671(09)33253-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Rambaran M, Ostrow B, Sibbald R, Woo K. Early impact of a comprehensive diabetic foot centre on diabetes-related amputation rates at Georgetown Public Hospital corporation, Guyana. Can J Diabetes 2009. [DOI: 10.1016/s1499-2671(09)33181-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Sibbald R, Woo K, Rambaran M, Ostrow B. International collaboration in Guyana to reduce amputations in persons with diabetes. Can J Diabetes 2009. [DOI: 10.1016/s1499-2671(09)33325-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Wong J, Gao Z, Selvaggi P, Woo K, Merrick S, El-Gabry M, Chen T, Cheng C, Uematsu M. Comparison of Interfractional Prostate Motion Among Normal, Overweight, and Obese Patient Groups. Int J Radiat Oncol Biol Phys 2007. [DOI: 10.1016/j.ijrobp.2007.07.2294] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Jiao LR, Szyszko T, Al-Nahhas A, Tait P, Canelo R, Stamp G, Wasan H, Lowdell C, Philips R, Thillainayagam A, Bansi D, Rubello D, Limongelli P, Woo K, Habib NA. Clinical and imaging experience with yttrium-90 microspheres in the management of unresectable liver tumours. Eur J Surg Oncol 2007; 33:597-602. [PMID: 17433608 DOI: 10.1016/j.ejso.2007.02.021] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2006] [Accepted: 02/12/2007] [Indexed: 12/21/2022] Open
Abstract
INTRODUCTION Selective internal radiation therapy (SIRT) is emerging as a new therapeutic modality in recent years for management of non-resectable hepatic malignancies. Our experience in clinical application of this treatment is reported here. MATERIAL AND METHODS From June 2004, patients whose liver tumours were no longer amenable for any conventional treatment with either chemotherapy or surgery were considered for yttrium-90 microspheres treatment after discussion at our multidisciplinary meeting. A pre-treatment planning was carried out with visceral angiography and technetium-99m macroaggregated albumin (MAA) for assessment of both tumour volume and extrahepatic shunting in addition to a baseline PET and CT scans, respectively. Two weeks later, a second visceral angiogram was performed to deliver the calculated dosage of microspheres into the arterial system supplying the tumour. Patients were then followed up with tumour markers, repeat PET and CT scans of abdomen at 6 weeks and 3 monthly thereafter. RESULT Twenty-one patients (F=11, M=10; age range 40-75 years, mean=58 years) received yttrium-90 microspheres consisting of liver metastases from colorectal primary (n=10) and non-colorectal primaries (n=8), and primary liver tumours (n=3). One patient received 2 treatments. The mean administered activity of microspheres delivered was 1.9 GBq (range 1.2-2.5 GBq). Injection of microspheres had no immediate effect on either clinical haematology or liver function tests. At follow-up, 86% of patients showed decreased activity on PET scan at 6 weeks (p=0.01). The mean pre-treatment SUV was 12.2+/-3.7 and the mean post-treatment SUV was 9.3+/-3.7, indicating a significant improvement measured with PET activity. Only 13% showed a reduction in the size of tumour on CT scan. For patients with colorectal liver metastases, there was no significant reduction in CEA level (127+/-115 vs 75+/-72 micro/l, p=0.39). Complications were seen in 4 patients (19%) including radiation hepatitis (n=2), cholecystitis (n=1) and duodenal ulceration (n=1). All resolved without surgical intervention. Seven patients died at follow-up from progressive extrahepatic disease (33%). CONCLUSION SIRT should be considered for patients with advanced liver cancer. It has a significant effect on liver disease in the absence of extrahepatic disease. PET imaging has an integral role in the assessment of patients treated with yttrium-90 SIR-Spheres.
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Affiliation(s)
- L R Jiao
- Department of HPB Surgery, Hammersmith Hospital and Imperial College School of Medicine, London, United Kingdom
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Selcuk S, Woo K, Tanner DB, Hebard AF, Borisov AG, Shabanov SV. Trapped electromagnetic modes and scaling in the transmittance of perforated metal films. Phys Rev Lett 2006; 97:067403. [PMID: 17026204 DOI: 10.1103/physrevlett.97.067403] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2006] [Indexed: 05/12/2023]
Abstract
We describe measurements and simulations of the enhanced transmittance by subwavelength hole arrays in silver films. The array period and hole size are systematically varied to give peak transmittances at wavelengths spanning a factor of 14. The spectra coincide when scaled using the array geometry and substrate refractive index alone, thus showing no significant dependence on the dielectric function of the metal. We argue that the spectra can be explained by interference of diffractive and resonant scattering. The resonant contribution comes from electromagnetic modes trapped in the film vicinity.
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Affiliation(s)
- S Selcuk
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
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Andreopoulos S, Wasserman M, Woo K, Li PP, Warsh JJ. Chronic lithium treatment of B lymphoblasts from bipolar disorder patients reduces transient receptor potential channel 3 levels. Pharmacogenomics J 2005; 4:365-73. [PMID: 15354175 DOI: 10.1038/sj.tpj.6500266] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Chronic lithium treatment of B-lymphoblast cell lines (BLCLs) from bipolar-I disorder (BD-I) patients and healthy subjects ex vivo attenuates agonist- and thapsigargin-stimulated intracellular calcium (Ca(2+)) responses. As these findings suggest that chronic lithium treatment modifies receptor (ROCE) and/or store-operated Ca(2+) entry (SOCE) mechanisms, we determined whether chronic lithium treatment of BLCLs modified the expression of two members of the transient receptor potential channels (TRPC1 & 3), which participate in ROCE/SOCE. Chronic lithium treatment significantly reduced BLCL TRPC3 immunoreactivity (repeated-measures ANOVA, P=0.00005), with interaction effects of diagnosis (P=0.037) and sex (P=0.040). The lithium-induced decrease was greatest in BLCLs from female BD-I patients compared with those from healthy females (-27%) and with vehicle-treated BLCLs from female BD-I patients (-33%). However, lithium treatment did not affect TRPC1 and 3 mRNA levels, and TRPC1 immunoreactivity. Downregulation of TRPC3 may be an important mechanism by which lithium ameliorates pathophysiological Ca(2+) disturbances as observed in BD.
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Affiliation(s)
- S Andreopoulos
- Laboratory of Cellular and Molecular Pathophysiology, Center for Addiction and Mental Health, University of Toronto, Toronto, Ontario, Canada
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McCullough A, Woo K, Telegrafi S, Lepor H. Is sildenafil failure in men after radical retropubic prostatectomy (RRP) due to arterial disease? Penile duplex Doppler findings in 174 men after RRP. Int J Impot Res 2002; 14:462-5. [PMID: 12494278 DOI: 10.1038/sj.ijir.3900909] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2002] [Revised: 03/05/2002] [Accepted: 04/27/2002] [Indexed: 11/08/2022]
Abstract
Sildenafil is frequently the first-line treatment for post-radical retropubic prostatectomy (RRP) erectile dysfunction (ED) with maximum treatment satisfaction rates of 43%-80%. The etiology of erectile dysfunction after RRP has been attributed to psychogenic, vascular, veno- occlusive or nerve injury causes. The purpose of this study was to gain insight into the penile duplex Doppler arterial parameters in men with ED after RRP who failed sildenafil. The purpose was to assess whether sildenafil failure after RRP is associated with underlying corporal arterial disease. A total of 174 consecutive men presenting with sildenafil refractory ED after nerve-sparing RRP underwent color duplex penile Doppler evaluation with vasoactive injection. Mean age was 59.6 y and mean time from surgery was 11.6 months. Some 81% (141/174) of the men had no pre-operative ED (PED). Significant differences in penile duplex Doppler parameters for arterial disease were seen between men with and without PED. In men without PED, 19% (27/141) manifested arterial insufficiency. However, in men with PED, 50% (16/33) demonstrated arterial disease. Nerve sparing status did not affect the presence of arterial disease. Sildenafil refractory erectile dysfunction after RRP in men without PED is not predominantly associated with penile Doppler parameters consistent with arterial insufficiency.
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Affiliation(s)
- A McCullough
- Department of Urology, New York University School of Medicine, New York 10016, USA.
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31
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Woo K. Aspiration pneumonia in patients with enteral feeding tube. Perspectives 2002; 23:2-3. [PMID: 12026409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Affiliation(s)
- K Woo
- Mount Sinai Hospital, Toronto, Ontario
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Woo K. Is vitamin E the magic bullet for the treatment of Alzheimer's disease (AD)? Perspectives 2002; 24:7-10. [PMID: 12026332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Affiliation(s)
- K Woo
- Mount Sinai Hospital, Toronto
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Ficazzola MA, Fraiman M, Gitlin J, Woo K, Melamed J, Rubin MA, Walden PD. Antiproliferative B cell translocation gene 2 protein is down-regulated post-transcriptionally as an early event in prostate carcinogenesis. Carcinogenesis 2001; 22:1271-9. [PMID: 11470758 DOI: 10.1093/carcin/22.8.1271] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
B cell translocation gene 2 (BTG2) is a p53 target that negatively regulates cell cycle progression in response to DNA damage and other stress. The objective of this study was to examine the expression, regulation and tumor suppressor properties of BTG2 in prostate cells. By immunohistochemistry BTG2 protein was detected in approximately 50% of basal cells in benign glands from the peripheral zone of the human prostate. BTG2 was expressed in all hyperproliferative atrophic peripheral zone lesions examined (simple atrophy, post-atrophic hyperplasia and proliferative inflammatory atrophy), but was undetectable or detectable at very low levels in the hyperproliferative epithelial cells of HGPIN and prostate cancer. BTG2 mRNA was detected in non-malignant prostate epithelial (PE) cells and in LNCaP cells, but not in PC-3 cells, consistent with p53-dependent regulation. In PE cells BTG2 protein was detected in areas of cell confluence by immunohistochemistry. BTG2 protein in LNCaP cells was undetectable by immunohistochemistry but was detected by immunoblotting at 8- to 9-fold lower levels than in PE cells. BTG2 protein levels were shown to be regulated by the ubiquitin-proteosome system. Forced expression of BTG2 in PC-3 cells was accompanied by a decreased rate of cell proliferation and decreased tumorigenicity of these cells in vivo. Taken together, these findings suggest that BTG2 functions as a tumor suppressor in prostate cells that is activated by cell quiescence, cell growth stimuli as part of a positive feedback mechanism and in response to DNA damage or other cell stress. The low steady-state levels of BTG2 protein in HGPIN and prostate cancer, a potential consequence of increased proteosomal degradation, may have important implications in the initiation and progression of malignant prostate lesions. Furthermore, these findings suggest that a significant component of the p53 G(1) arrest pathway might be inactivated in prostate cancer even in the absence of genetic mutations in p53.
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Affiliation(s)
- M A Ficazzola
- Department of Urology, New York University School of Medicine, 540 First Avenue, New York, NY 10016, USA
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Woo K, Wieczorek R, Torre P, Lepor H. Prostate adenocarcinoma presenting as a large supraclavicular mass. Rev Urol 2001; 3:102-5. [PMID: 16985698 PMCID: PMC1476041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Metastatic prostate cancer is classically associated with bony or pelvic lymphatic metastasis. This case review represents an unusual case of prostate cancer presenting with a large left supraclavicular neck mass.
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Woo K. Physical activity as a mediator between dyspnea and fatigue in patients with chronic obstructive pulmonary disease. Can J Nurs Res 2000; 32:85-98. [PMID: 11928136] [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: 02/24/2023] Open
Abstract
A cross-sectional design was used to examine the mediating effect of physical activity between dyspnea and fatigue in patients with chronic obstructive pulmonary disease (COPD). Dyspnea was measured using a vertical visual analogue scale, fatigue using the Profile of Mood States-Fatigue subscale, and physical activity using the 6-minute-walk (6MW) test. A convenience sample of 17 male and 22 female patients with COPD provided data for analysis. The sample was characterized by relatively high forced expiratory volume in 1 second (FEV1) of predicted normal values, indicating mild lung impairment and high mean levels of fatigue and dyspnea. Controlling for age and FEV1, dyspnea, physical activity, and fatigue were significantly interrelated. Results of the regression analysis suggested the mediating function of physical activity between dyspnea and fatigue. Limitations and suggestions for practice and future research are presented.
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Affiliation(s)
- K Woo
- Mount Sinai Hospital, Toronto, Ontario, Canada
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Abstract
A descriptive-correlational design was used to examine the relationships between dyspnoea, physical activity, and fatigue in patients with chronic obstructive pulmonary disease (COPD). Lazarus and Folkman's theory of stress, appraisal, and coping provided a framework to guide the study. Dyspnoea was measured by a vertical visual analogue scale, fatigue by the Fatigue subscale of the Profile of Mood States, and physical activity by the six-minute walk (6 MW) test and an open-ended question. A convenience sample of seven male and 15 female patients with COPD provided data for analysis. The sample was characterized by relatively high forced expiratory volume in one second (FEV1) indicating mild lung impairment and high mean levels of fatigue and dyspnoea. No significant gender difference was found in the ratings of dyspnoea and fatigue and the 6 MW distance. Dyspnoea, physical activities, and fatigue were all significantly inter-related (P < 0.001). Results indicated that the higher the dyspnoea scores, the shorter the 6 MW distance walked, and the higher the fatigue scores. Limitations and suggestions for nursing practice and future research are presented.
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Affiliation(s)
- K Woo
- Mount Sinai Hospital, 600 University Avenue, Toronto, Ontario, Canada M5G 1X5
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Jochová J, Quaglino D, Zakeri Z, Woo K, Sikorska M, Weaver V, Lockshin RA. Protein synthesis, DNA degradation, and morphological changes during programmed cell death in labial glands of Manduca sexta. Dev Genet 2000; 21:249-57. [PMID: 9438339 DOI: 10.1002/(sici)1520-6408(1997)21:4<249::aid-dvg2>3.0.co;2-7] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Labial glands of the tobacco hornworm Manduca sexta (Lepidoptera: Sphingiidae, homologues of Drosophila salivary glands, undergo programmed cell death (PCD) in a 4-day period during larva-to-pupa metamorphosis. The programmed death of the labial gland was examined by electron microscopy and measurement of protein synthesis as well as measurement of DNA synthesis, end-labeling of single strand breaks, and pulsed-field gel electrophoresis. One of the earliest changes observed is a sharp drop in synthesis of most proteins, coupled with synthesis of a glycine-rich protein, reminiscent of silk-like proteins. From a morphological standpoint, during the earliest phases the most prominent changes are the formation of small autophagic vacuoles containing ribosomes and an apparent focal dissolution of the membranes of the endoplasmic reticulum, whereas later changes include differing destruction at the lumenal and basal surfaces of the cell and erosion of the basement membrane. By the fourth day of metamorphosis, individual cells become rapidly vacuolated in a cell-independent manner. In the vacuolated cells on day 3, chromatin begins to coalesce. It is at this period that unequivocal nucleosomal ladders are seen and end-labeling in situ or electrophoretic techniques document single on double-strand breaks, respectively. DNA synthesis ceases shortly after the molt to the fifth instar, as detected by incorporation of tritiated thymidine and weak TUNEL labeling. Large size fragments of DNA are seen shortly after DNA synthesis ceases and thence throughout the instor, raising the possibility of potential limitations built into the cells before their final collapse.
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Affiliation(s)
- J Jochová
- Department of Biological Sciences, St. John's University, Jamaica, New York 11439, USA
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Woo K, Waisman J, Melamed J, Lepor H. Primary aldosteronism caused by unilateral adrenal hyperplasia. Rev Urol 2000; 2:100-4. [PMID: 16985748 PMCID: PMC1476104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
In the hypertensive population, primary aldosteronism has been reported to have a prevalence of 0.1% to 2%, with the main causes being aldosterone-producing adenomas and bilateral hyperplasia. However, there is a third rare entity, called unilateral adrenal hyperplasia, that contributes to primary aldosteronism. Unilateral hyperplasia and primary aldosteronism are the subjects of this case review.
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Abstract
OBJECTIVE Despite current recommendations calling for regular screening flexible sigmoidoscopies over the age of 50, only a small percentage of the population have regular examinations. Improving patient tolerance of flexible sigmoidoscopies could therefore increase patient compliance with these recommended guidelines. The aim of this study was to determine whether audio and visual stimulation reduces discomfort during flexible sigmoidoscopy and whether the effects of the stimulation are secondary to distraction. METHODS A total of 37 patients undergoing routine screening flexible sigmoidoscopy were randomized to receive no intervention, audio stimulation alone, or audio and visual stimulation. Patient discomfort ratings and affect states were measured prior to and immediately following flexible sigmoidoscopy using a visual analogue scale and the Stress Symptom Ratings (SSR) ratings. RESULTS Patients receiving audio and visual intervention had lower abdominal discomfort ratings (7.1 +/- 1.4) than patients receiving audio stimulation (9.5 +/- 1.3) or no intervention (10.8 +/- 1.6) (p < 0.05). Patients receiving audio and visual intervention also had higher arousal (7.3 +/- 0.4) and attention (9.2 +/- 0.2) ratings than patients receiving no intervention (6.1 +/- 0.4 and 6.2 +/- 0.7, respectively) (p < 0.05). Anxiety and anger ratings, on the other hand, were significantly lower in patients receiving audio and visual intervention (2.5 +/- 0.4, 1.4 +/- 0.3, respectively) than patients receiving no intervention (4.4 +/- 0.6, 3.6 +/- 0.7). CONCLUSION Audio and visual stimulation reduces abdominal discomfort associated with flexible sigmoidoscopy. This effect appears to be due to distraction.
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Affiliation(s)
- T Lembo
- Beth Israel Deaconess Hospital, Harvard Medical School, Boston, Massachusetts 02215, USA
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Abstract
We determine the timing of neural commitment by hindbrain tissue in the zebrafish using microsurgical transplantation. When transplanted at shield stage to the ventral side of the embryo, presumptive hindbrain cells are not committed, as they can adapt to their environment and give rise to epidermis. In contrast, when transplanted at 80% epiboly, hindbrain cells retain their neural fate and express neural-specific antigens. Moreover, they are able to maintain regional fate, as is evident by the expression of the hindbrain-specific marker, Krox20. In addition, we observe that committed hindbrain tissues are able to induce presumptive ventral epidermis to form neural crest derivatives, otic vesicles, and neural tissues. We propose that hindbrain progenitors have acquired regional identity as a group at 80% epiboly even before making vertical contact with axial mesoderm. These results suggest that planar induction may constitute a significant component in the zebrafish neural patterning pathway.
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Affiliation(s)
- K Woo
- Biological Imaging Center, Beckman Institute, California Institute of Technology, Pasadena 91125, USA
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Jang M, Lee E, Woo K. Income, language, and citizenship status: factors affecting the health care access and utilization of Chinese Americans. Health Soc Work 1998; 23:136-145. [PMID: 9598396 DOI: 10.1093/hsw/23.2.136] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
This article reports the results of a randomly administered interview of 1,808 Chinese American residents of San Francisco. The study examines income, language, and citizenship status and their effect on the use of health care services by this population. The articles discusses the implications of the findings for low-income and uninsured individuals, particularly people of immigrant status, and concludes with suggestions for local health care planners and advocates.
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Affiliation(s)
- M Jang
- Four Winds Research Corporation, San Francisco, CA 94107, USA
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Abstract
The organizer of the amphibian gastrula provides the neurectoderm with both neuralizing and posteriorizing (transforming) signals. In zebrafish, transplantations show that a spatially distinct transformer signal emanates from tissues other than the organizer. Cells of the germring (nonaxial mesendoderm) posteriorized forebrain progenitors when grafted nearby, resulting in an ectopic hindbrain-like structure; in contrast, cells of the organizer (axial mesendoderm) caused no posterior transformation. Local application of basic fibroblast growth factor, a candidate transformer in Xenopus, caused malformation but not hindbrain transformation in the forebrain. Thus, the zebrafish gastrula may integrate spatially distinct signals from the organizer and the germring to pattern the neural axis.
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Affiliation(s)
- K Woo
- Division of Biology and Biological Imaging Center, Beckman Institute, California Institute of Technology, Pasadena, CA 91125, USA.
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Abstract
Studies of defective interfering (DI) RNAs of the murine coronavirus mouse hepatitis virus (MHV) suggest that a 69-nucleotide-long packaging signal is necessary for MHV genomic RNA packaging into MHV particles. In this study we showed that when RNA transcripts that consisted of a non-MHV sequence and the packaging signal were expressed in MHV-infected cells, they were packaged into MHV particles. Those RNA transcripts that lacked the packaging signal or those containing a mutated packaging signal did not package efficiently. Thus, the presence of the packaging signal was sufficient for RNA packaging into MHV particles.
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Affiliation(s)
- K Woo
- Department of Microbiology, The University of Texas at Austin, 78712-1095, USA
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French J, Williams B, Hart H, Woo K, Wang L, Grant J, Ingram C, O'Brien P, Poole J, Sharpe N, Williams M, White H. Management of acute myocardial infarction in Auckland. N Z Med J 1996; 109:248-51. [PMID: 8692449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
AIM To analyse the utilisation of therapies in coronary care units for patients with acute myocardial infarction. METHODS An evaluation form was completed prospectively by a designated nurse in each coronary care unit of the four Auckland hospitals in 1993. RESULTS One thousand and eighty one patients who were admitted with definite or probable acute myocardial infarction had a coronary care unit stay of 63.4 (SD 49.3) hours, and hospital stay of 7.3 (5.1) days. The mortality for definite myocardial infarction was 13.7% (< 70 years 7.1%). Coronary angiography was performed on 10% of patients during their hospital admission, and 4.9% underwent revascularisation. Thrombolytic therapy was administered to 52% (495/948) of patients with definite infarction and 4% had contraindications. Patients aged > or = 70 years (47% vs 55% p = 0.02) or diabetics (46% vs 56%, p = 0.04) were less likely to receive thrombolysis. The utilisation of aspirin and oral beta-blockers was 86% and 40%, respectively, in patients with definite infarction and both were used less frequently in patients > or = 70 years. Intravenous beta-blockers were administered to < 1% of patients. Angiotensin converting enzyme (ACE) inhibitors were prescribed in 21%, intravenous or long acting nitrates in 41% and calcium antagonists in 14%; the latter two therapies were used more frequently in patients > or = 70 years. There was no evidence of gender or ethnic bias for either investigation or treatment. CONCLUSION On the basis of results of recent clinical trials, there may be under utilisation of some treatments for acute myocardial infarction including aspirin, thrombolytic therapy, beta-blockers and ACE inhibitors, while calcium antagonists may be over used.
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Affiliation(s)
- J French
- Coronary Care Unit, Auckland Hospital
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Abstract
The metamorphic death of the labial glands of the tobacco hornworm, Manduca sexta, occurs during a 4 day period during larva-to-pupa metamorphosis. The earliest changes marking the death of the cell, all occurring on the first day, are a sharp drop in protein synthesis, coupled with the selective survival or upregulation of a few messages. An early rearrangement of the rough endoplasmic reticulum is presumably related to the generalized decrease in protein synthesis. Lysosomal acid phosphatase also begins to increase very early, and ultimately the bulk of the cytoplasm is destroyed in autophagic vacuoles, but activation of lysosomes does not account for the decreased rate of synthesis. The mechanism by which most protein synthesis is depressed remains under investigation.
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Affiliation(s)
- Z Zakeri
- Department of Biology, Queens College, Flushing, New York 11367, USA
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Woo K. Fatigue in COPD. Nurse Pract 1995; 20:11, 14-5. [PMID: 8532220] [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: 01/31/2023]
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Abstract
The zebrafish is an excellent vertebrate model for the study of the cellular interactions underlying the patterning and the morphogenesis of the nervous system. Here, we report regional fate maps of the zebrafish anterior nervous system at two key stages of neural development: the beginning (6 hours) and the end (10 hours) of gastrulation. Early in gastrulation, we find that the presumptive neurectoderm displays a predictable organization that reflects the future anteroposterior and dorsoventral order of the central nervous system. The precursors of the major brain subdivisions (forebrain, midbrain, hindbrain, neural retina) occupy discernible, though overlapping, domains within the dorsal blastoderm at 6 hours. As gastrulation proceeds, these domains are rearranged such that the basic order of the neural tube is evident at 10 hours. Furthermore, the anteroposterior and dorsoventral order of the progenitors is refined and becomes aligned with the primary axes of the embryo. Time-lapse video microscopy shows that the rearrangement of blastoderm cells during gastrulation is highly ordered. Cells near the dorsal midline at 6 hours, primarily forebrain progenitors, display anterior-directed migration. Cells more laterally positioned, corresponding to midbrain and hindbrain progenitors, converge at the midline prior to anteriorward migration. These results demonstrate a predictable order in the presumptive neurectoderm, suggesting that patterning interactions may be well underway by early gastrulation. The fate maps provide the basis for further analyses of the specification, induction and patterning of the anterior nervous system, as well as for the interpretation of mutant phenotypes and gene-expression patterns.
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Affiliation(s)
- K Woo
- Division of Biology, Beckman Institute, California Institute of Technology, Pasadena 91125, USA
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Min B, Woo K, Baek J, Lee G, Park N. Malignant transformation of hpv-immortalized human oral keratinocytes by chemical carcinogens. Int J Oncol 1995; 7:249-256. [PMID: 21552832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
Abstract
We previously immortalized primary human oral keratinocytes by transfection with cloned human papillomavirus type 16 (HPV-16) DNA and established a cell line, human oral keratinocytes-16B (HOK-16B). This line contained intact HPV-16 DNA in an integrated form, expressed viral genes, and demonstrated an indefinite life span. However, the cells proliferated only in keratinocyte growth medium containing a low level of calcium and were not tumorigenic in nude mice. To develop an in vitro multistage model suitable for the study of human oral carcinogenesis and to investigate the molecular mechanisms of cell transformation, the HOK-16B cells were exposed to either benzo(a)pyrene [B(a)P] or 7,12-dimethylbenz(a)anthracene (DMBA). Two chemically transformed cell colonies, one from B(a)P exposure and the other from DMBA treatment, were isolated. These cell lines proliferated well in Dulbecco's minimum essential medium containing a physiological level of calcium, demonstrated anchorage-independent growth, and developed tumors in nude mice. They contained integrated HPV-16 sequences and expressed higher levels of epidermal growth factor receptor (EGFR) and c-myc transcripts compared to the parental cells. Similar to their immortalized parental cells, the chemically transformed cells also contained lower levels of p53 protein and transforming growth factor-beta (TGF-beta) transcripts than normal human oral keratinocytes. These results indicate that malignant transformation of oral keratinocytes can be caused by a sequential combined effect of high-risk HPV and chemical carcinogens. It also demonstrates that overexpression of viral E6/E7, EGFR and c-myc messages, together with the down-regulation of TGF-beta mRNA and the inactivation of p53 gene, may be associated with the malignant conversion of HPV-immortalized cells.
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Affiliation(s)
- B Min
- UNIV CALIF LOS ANGELES, DENT RES INST, LOS ANGELES, CA 90024 USA. JONSSON COMPREHENS CANC CTR, LOS ANGELES, CA 90024 USA
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Abstract
In the past few years, we have seen a surge of interest in the zebrafish as a model system for the study of embryonic induction and patterning. This review summarizes our current knowledge of the organization of zebrafish fate maps during early development. Recent advances have addressed the relationship between early cleavage planes and the future dorsal axis, the pattern of cell mixing during blastula and gastrula stages, and the morphogenesis of the trunk neural keel. In addition, refined fate maps have become available for the embryonic shield, the central nervous system, and the heart. In combination with recent advances in molecular and genetic manipulations, these fate maps set the stage for new, more incisive, experimental approaches.
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Affiliation(s)
- K Woo
- Division of Biology, Beckman Institute, California Institute of Technology, Pasadena 91125, USA
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Woo K, Emery J, Peabody J. Cortical hyperostosis: a complication of prolonged prostaglandin infusion in infants awaiting cardiac transplantation. Pediatrics 1994; 93:417-20. [PMID: 8115200] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND Infants awaiting heart transplantation for congenital heart disease frequently require prostaglandin E1 (PGE1) infusion for prolonged periods. As a result, complications of prolonged PGE1 infusion, such as cortical hyperostosis, are being encountered more commonly. OBJECTIVE To determine the incidence and severity of cortical hyperostosis in newborns requiring prolonged PGE1 infusion. METHODS Chest radiographs of 86 infants receiving PGE1 infusion awaiting heart transplantation were reviewed. The chest radiographs were graded for the severity of cortical hyperostosis (no bony changes, minimal hyperostosis, or severe hyperostosis). Duration of PGE1 infusion, total PGE1 dose, and highest alkaline phosphatase were recorded for each patient. Infants were arbitrarily divided into three groups according to the duration of PGE1 infusion (< 30 days, 30 to 60 days, > 60 days). RESULTS Fifty-three of the 86 infants (62%) had radiologic evidence of cortical hyperostosis. Forty-two of 80 infants (53%) had elevated alkaline phosphatase. The percentage of infants with hyperostosis increased with increasing duration of PGE1 infusion (42% at < 30 days; 87% at 30 to 60 days; 100% at > 60 days). The incidence and severity of cortical hyperostosis were related (by Kruskal-Wallis) to the duration of PGE1 infusion (P < .0001) and the total dose of PGE1 received (P < .0001). The highest alkaline phosphatase levels were observed in infants with the most severe grades of hyperostosis (P < .0001). The percentage of infants with elevated alkaline phosphatase increased with greater severity of hyperostosis (26% of infants with no bony changes, 59% with minimal changes, and 85% with severe changes). Two infants had symptomatic bone tenderness or swelling mimicking osteomyelitis. CONCLUSION It is concluded that cortical hyperostosis is a frequent, often asymptomatic, side effect of prolonged PGE1 infusion that should be evaluated in any infant on long-term PGE1 therapy. When symptoms occur in infants awaiting transplantation, osteomyelitis must be excluded rapidly to avoid an unnecessary delay in transplantation.
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Affiliation(s)
- K Woo
- Department of Pediatrics, Loma Linda University Medical Center, CA 92354
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