201
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Chan C. Oral cancers – an analysis of management and outcome. Int J Oral Maxillofac Surg 2013. [DOI: 10.1016/j.ijom.2013.07.339] [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]
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202
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Chu LW, Yik P, Kwan F, Chan C, Ha J, Lam K. Leptin and the risk of progression to Alzheimer's disease among Chinese older adults with amnestic mild cognitive impairment. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.1183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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203
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Chan C, Villar A, Torres D. [Pancreatic neoplasms]. Rev Gastroenterol Mex 2013; 78 Suppl 1:45-7. [PMID: 24041056 DOI: 10.1016/j.rgmx.2013.06.022] [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] [Subscribe] [Scholar Register] [Received: 06/09/2013] [Revised: 06/27/2013] [Accepted: 06/28/2013] [Indexed: 10/26/2022]
Affiliation(s)
- C Chan
- Departamento de Cirugía General. Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán.
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Liu C, Baek S, Kim J, Vasko E, Pyne R, Chan C. Effect of Static Pre-stretch Induced Surface Anisotropy on Orientation of Mesenchymal Stem Cells. Cell Mol Bioeng 2013; 7:106-121. [PMID: 24678348 DOI: 10.1007/s12195-013-0300-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [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: 12/21/2022] Open
Abstract
Mechanical cues in the cellular environment play important roles in guiding various cell behaviors, such as cell alignment, migration, and differentiation. Previous studies investigated mechanical stretch guided cell alignment pre-dominantly with cyclic stretching whereby an external force is applied to stretch the substrate dynamically (i.e., cyclically) while the cells are attached onto the substrate. In contrast, we created a static pre-stretched anisotropic surface in which the cells were seeded subsequent to stretching the substrate. We hypothesized that the cell senses the physical environment through a more active mechanism, namely, even without external forces the cell can actively apply traction and sense an increased stiffness in the stretched direction and align in that direction. To test our hypothesis, we quantified the extent of pre-stretch induced anisotropy by employing the theory of small deformation superimposed on large and predicted the effective stiffness in the stretch direction as well as its perpendicular direction. We showed mesenchymal stem cells (MSC) aligned in the pre-stretched direction, and the cell alignment and morphology were dependent on the pre-stretch magnitude. In addition, the pre-stretched surface demonstrated an ability to promote early myoblast differentiation of the MSC. This study is the first report on MSC alignment on a statically pre-stretched surface. The cell orientation induced by the pre-stretch induced anisotropy could provide insight into tissue engineering applications involving cells that aligned in vivo in the absence of dynamic mechanical stimuli.
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Affiliation(s)
- C Liu
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA
| | - S Baek
- Department of Mechanical Engineering, Michigan State University, East Lansing, MI 48824, USA
| | - J Kim
- Department of Mechanical Engineering, Michigan State University, East Lansing, MI 48824, USA
| | - E Vasko
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA
| | - R Pyne
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA
| | - C Chan
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA ; Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA
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205
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Chan Wah Hak YS, Chan C. Coil embolisation of a septal artery in a patient with hypertrophic obstructive cardiomyopathy. Singapore Med J 2013; 54:e172-5. [DOI: 10.11622/smedj.2013164] [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: 11/18/2022]
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206
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Holloway L, Batumalai V, Moran C, Liney G, Koh E, Lazarus E, Dimigen M, Papadatos G, Boxer M, Chan C, Delaney G. SU-E-J-175: Comparison of Prone and Supine MRI Sequences for the Purpose of Radiotherapy Treatment Planning for Breast Cancer. Med Phys 2013. [DOI: 10.1118/1.4814387] [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: 11/07/2022] Open
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207
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Brady S, Lalli P, Midha N, Chan A, Garven A, Chan C, Toth C. Presence of Neuropathic Pain May Explain Poor Performances on Olfactory Testing in Diabetes Mellitus Patients. Chem Senses 2013; 38:497-507. [DOI: 10.1093/chemse/bjt013] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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208
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Kim JH, Chan C, Elwell C, Singer MS, Dierks T, Lemjabbar-Alaoui H, Rosen SD, Engel JN. Endosulfatases SULF1 and SULF2 limit Chlamydia muridarum infection. Cell Microbiol 2013; 15:1560-71. [PMID: 23480519 DOI: 10.1111/cmi.12133] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2012] [Revised: 03/04/2013] [Accepted: 03/04/2013] [Indexed: 12/30/2022]
Abstract
The first step in attachment of Chlamydia to host cells is thought to involve reversible binding to host heparan sulfate proteoglycans (HSPGs), polymers of variably sulfated repeating disaccharide units coupled to diverse protein backbones. However, the key determinants of HSPG structure that are involved in Chlamydia binding are incompletely defined. A previous genome-wide Drosophila RNAi screen suggested that the level of HSPG 6-O sulfation rather than the identity of the proteoglycan backbone maybe a critical determinant for binding. Here, we tested in mammalian cells whether SULF1 or SULF2, human endosulfatases, which remove 6-O sulfates from HSPGs, modulate Chlamydia infection. Ectopic expression of SULF1 or SULF2 in HeLa cells, which decreases cell surface HSPG sulfation, diminished C. muridarum binding and decreased vacuole formation. ShRNA depletion of endogenous SULF2 in a cell line that primarily expresses SULF2 augmented binding and increased vacuole formation. C. muridarum infection of diverse cell lines resulted indownregulation of SULF2 mRNA. In a murine model of acute pneumonia, mice genetically deficient in both endosulfatases or in SULF2 alone demonstrated increased susceptibility to C. muridarum lung infection. Collectively, these studies demonstrate that the level of HSPG 6-O sulfation is a critical determinant of C. muridarum infection in vivo and that 6-O endosulfatases are previously unappreciated modulators of microbial pathogenesis.
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Affiliation(s)
- J H Kim
- Department of Medicine, University of California San Francisco, San Francisco, California, USA
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209
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Hotouras A, Murphy J, Chan C. Emergency transanal haemorrhoidal Doppler guided dearterialization for acute and persistent haemorrhoidal bleeding. Colorectal Dis 2013; 15:380. [PMID: 23350868 DOI: 10.1111/codi.12126] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Accepted: 10/16/2012] [Indexed: 02/08/2023]
Affiliation(s)
- A. Hotouras
- Academic Surgical Unit; Barts Health NHS Trust; National Centre for Bowel Research and Surgical Innovation; Abernethy Building; 2 Newark Street; London; UK
| | - J. Murphy
- Academic Surgical Unit; Barts Health NHS Trust; National Centre for Bowel Research and Surgical Innovation; Abernethy Building; 2 Newark Street; London; UK
| | - C. Chan
- Academic Surgical Unit; Barts Health NHS Trust; National Centre for Bowel Research and Surgical Innovation; Abernethy Building; 2 Newark Street; London; UK
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210
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Lo D, Chan C, Hyun J, Chung M, Montoro D, Wan D, Weissman I, Longaker M. Identification and Characterization of Neurocranial Skeletal Progenitor Cells. J Surg Res 2013. [DOI: 10.1016/j.jss.2012.10.856] [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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211
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212
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Lam K, Chan C, Scollard D, Reilly R. 452 Preclinical Pharmacokinetics, Radiation Dosimetry and Toxicity of 111In-BzDTPA-pertuzumab, an Agent for Imaging Early Response to Trastuzumab in Breast Cancer Patients. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)72250-5] [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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213
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Chan C, Zeidan Y, Advani R, Le Q, Hoppe R. Evaluation of Radiation Therapy for NK-T-cell Lymphoma of the Head and Neck. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1652] [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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214
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Zeidan Y, Murphy J, Chan C, An Y, Kaplan M, Colevas A, Kong C, Le Q. Postoperative Radiation Therapy for Minor Salivary Gland Carcinomas of the Head and Neck: Long-term Outcomes. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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215
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Tang C, Komakula S, Chan C, Murphy J, Kong C, Jensen K, Le Q. Radiologic Assessment of Lymph Node Involvement in HPV/p16+ Oropharyngeal Cancers. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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216
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Zhou W, Bibila T, Glazomitsky K, Montalyo J, Chan C, Distefano D, Munshi S, Robinson D, Buckland B, Aunins J. Large scale production of recombinant mouse and rat growth hormone by fed-batch GS-NSO cell cultures. Cytotechnology 2012; 22:239-50. [PMID: 22358934 DOI: 10.1007/bf00353944] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Investigations of biological effects of prolonged elevation of growth hormone in animals such as mice and rats require large amounts of mouse and rat growth hormone (GH) materials. As an alternative to scarce and expensive pituitary derived materials, both mouse and rat GH were expressed in NSO murine myeloma cells transfected with a vector containing the glutamine synthetase (GS) gene and two copies of mouse or rat GH cDNA. For optimal expression, the mouse GH vector also contained sequences for targeting integration by homologous recombination. Fed-batch culture processes for such clones were developed using a serum-free, glutamine-free medium and scaled up to 250 L production scale reactors. Concentrated solutions of proteins, amino acids and glucose were fed periodically to extend cell growth and culture lifetime, which led to an increase in the maximum viable cell concentration to 3.5×10(9) cells/L and an up to 10 fold increase in final mouse and rat rGH titers in comparison with batch cultures. For successful scale up, similar culture environmental conditions were maintained at different scales, and specific issues in large scale reactors such as balancing oxygen supply and carbon dioxide removal, were addressed. Very similar cell growth and protein productivity were obtained in the fed-batch cultures at different scales and in different production runs. The final mouse and rat rGH titers were approximately 580 and 240 mg/L, respectively. During fed-batch cultures, the cell growth stage transition was accompanied by a change in cellular metabolism. The specific glucose consumption rate decreased significantly after the transition from the growth to stationary stage, while lactate was produced in the exponential growth stage and became consumed in the stationary stage. This was roughly coincident with the beginning of ammonia and glutamate accumulation at the entry of cells into the stationary stage as the result of a reduced glutamine consumption and periodic nutrient additions.
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Affiliation(s)
- W Zhou
- Merck Research Laboratories, P.O. Box 2000, 07065, Rahway, NJ, USA
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217
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Lamare G, Shorr A, Chan C. 60 Can We Reduce the Use of Computed Tomography Pulmonary Angiography in Young Female Patients Being Evaluated for Pulmonary Embolism? Ann Emerg Med 2012. [DOI: 10.1016/j.annemergmed.2012.06.339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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218
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Chan C, Zilberberg M, Lamare G, Shorr A. Catheter-Directed Thrombolysis for Acute Deep Vein Thrombosis: A Cost-effectiveness Analysis. Chest 2012. [DOI: 10.1378/chest.1385992] [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: 11/01/2022] Open
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219
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220
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Chan C, Santes O. [Pancreatic tumors: an update]. Rev Gastroenterol Mex 2012; 77 Suppl 1:108-111. [PMID: 22939502 DOI: 10.1016/j.rgmx.2012.07.041] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Affiliation(s)
- C Chan
- Adscrito al Servicio de Cirugía General y Clínica de Páncreas, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, SSA, México, D.F
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221
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Li M, Chan C, Chan C, Chan H, Hui L, Ziea E. P04.78. Development of an integrative service model for dysthymia patients with body-mind-spirit approach in Chinese medicine clinics in Hong Kong. Altern Ther Health Med 2012. [PMCID: PMC3373952 DOI: 10.1186/1472-6882-12-s1-p348] [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]
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222
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Toth C, Mawani S, Brady S, Chan C, Liu C, Mehina E, Garven A, Bestard J, Korngut L. A Randomized, Double-Blind, Placebo Controlled, Parallel Assignment, Flexible Dose, Efficacy Study of Nabilone as Adjuvant in the Treatment of Diabetic Peripheral Neuropathic Pain Using an Enriched Enrollment Randomized Withdrawal Design (S38.003). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.s38.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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223
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Arabzadeh A, Chan C, Nouvion AL, Breton V, Benlolo S, DeMarte L, Turbide C, Brodt P, Ferri L, Beauchemin N. Host-related carcinoembryonic antigen cell adhesion molecule 1 promotes metastasis of colorectal cancer. Oncogene 2012; 32:849-60. [PMID: 22469976 DOI: 10.1038/onc.2012.112] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Liver metastasis is the predominant cause of colorectal cancer (CRC)-related mortality in developed countries. Carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1) is a cell adhesion molecule with reduced expression in early phases of CRC development and thus functions as a tumor growth inhibitor. However, CEACAM1 is upregulated in metastatic colon cancer, suggesting a bimodal role in CRC progression. To investigate the role of this protein in the host metastatic environment, Ceacam1(-/-) mice were injected intrasplenically with metastatic MC38 mouse CRC cells. A significant reduction in metastatic burden was observed in Ceacam1(-/-) compared with wild-type (WT) livers. Intravital microscopy showed decreased early survival of MC38 cells in Ceacam1(-/-) endothelial environment. Metastatic cell proliferation within the Ceacam1(-/-) livers was also diminished. Bone marrow-derived cell recruitment, attenuation of immune infiltrates and diminished CCL2, CCL3 and CCL5 chemokine production participated in the reduced Ceacam1(-/-) metastatic phenotype. Transplantations of WT bone marrow (BM) into Ceacam1(-/-) mice fully rescued metastatic development, whereas Ceacam1(-/-) BM transfer into WT mice showed reduced metastatic burden. Chimeric immune cell profiling revealed diminished recruitment of CD11b(+)Gr1(+) myeloid-derived suppressor cells (MDSCs) to Ceacam1(-/-) metastatic livers and adoptive transfer of MDSCs confirmed the involvement of these immune cells in reduction of liver metastasis. CEACAM1 may represent a novel metastatic CRC target for treatment.
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Affiliation(s)
- A Arabzadeh
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec, Canada
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224
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Horsnell J, Kallaway C, Chan C, Bristol J, Court F, Stone N. 420 Real Time Assessment of Axillary Nodes Based On Molecular Differences Using Raman Spectroscopy. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)70486-0] [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] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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225
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Malalis C, Jeong D, Virmani S, Chan C, Pillai A. Abstract No. 444: Recanalization techniques for central venous occlusions: a pictorial essay. J Vasc Interv Radiol 2012. [DOI: 10.1016/j.jvir.2012.01.041] [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] Open
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226
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Spence GT, Chan C, Szemes F, Beer PD. Anion binding induced conformational changes exploited for recognition, sensing and pseudorotaxane disassembly. Dalton Trans 2012; 41:13474-85. [DOI: 10.1039/c2dt31640d] [Citation(s) in RCA: 20] [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: 11/21/2022]
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227
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Lau C, Chan V, Yan S, Tam R, Chan C, Mok M. Pathogenesis of systemic lupus erythematosus update. Pathology 2012. [DOI: 10.1016/s0031-3025(16)32688-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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228
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Goh T, Tan K, Goh T, Willis Y, Chan C. Exercise Testing (Et) in Coarctation of Aorta (COA)—A 20-Year Experience. Heart Lung Circ 2012. [DOI: 10.1016/j.hlc.2012.05.717] [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: 10/28/2022]
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229
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Danilova M, Chan C, Mollon J. Individual differences in cone ratio: Measurements by counterphase modulation photometry and by spatial acuity. J Vis 2011. [DOI: 10.1167/11.15.33] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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230
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Betambeau N, Chan C. P5-16-01: Are We Going To Be Able To Train Future Surgeons How To Perform Axillary Lymph Node Dissection? Cancer Res 2011. [DOI: 10.1158/0008-5472.sabcs11-p5-16-01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Axillary lymph node dissection (ALND) has been performed regularly by surgeons for several decades. The sentinel lymph node era has led to a reduction in ALND procedures as node negative women are now spared further surgery and morbidity. Following the publication of the ACOSOG Z0011 trial, it is conceivable that completion ALND (cALND) may be rendered unnecessary for many women who have breast conserving surgery and have 1 to 2 positive sentinel lymph node disease. If there is a substantial drop in ALND procedures, this may impact on our ability to train surgeons in the future.
Material and Methods: We retrospectively reviewed the breast cancer practice for 2 consultant surgeons in a busy UK centre. In this centre all patients with a positive diagnosis of invasive breast cancer had preoperative axillary ultrasound scanning (USS) and needle biopsy (fine needle aspiration or core biopsy) if enlarged or suspicious axillary lymph nodes were seen. Hence sentinel lymph node biopsy (SLNB) was only performed on patients with both clinically and radiologically negative axillary lymph nodes.
Results: In 2009 and 2010 the 2 consultants treated a total of 255 patients with invasive breast cancer. Thirty one patients (12.2%) had positive axillary lymph disease identified by USS and axillary needle biopsy; these women were treated with ALND. The remaining 224 patients had clinically and radiologically negative axillary lymph nodes and proceeded to SLNB. Of these, 58 patients had at least one positive sentinel lymph node (25.9%) and proceeded to cALND; 39 women had breast conserving surgery and 19 women had mastectomy. If our centre were to adopt a policy of observation only in those women having breast conserving surgery and whom had no more than 2 positive sentinel lymph nodes (as per ACOSOG Z0011 trial), then 33 fewer ALND would have been performed. This would leave a new total of 56 ALND procedures being performed over a 2 year period in women with pre-operatively identified positive axillary lymph nodes, those undergoing mastectomy and those women with 3 or greater positive sentinel lymph nodes on SLNB. On our service we have 2 residents which would result in a maximum number of 14 ALND procedures per year that each resident may be trained to perform. It is likely that the actual number will be less due to commitments away from the elective operating room, such as emergency duties and annual leave etc. Is this an adequate number of ALND procedures for a resident to gain competence in the technique?
Discussion: The training of surgical residents is competence based and if our centre is representative of most centres treating breast cancers in the UK, will the teaching of ALND procedures be limited to specialist, ultra-high volume centres if the ACOSOG Z0011 trial findings are to be adopted?
Citation Information: Cancer Res 2011;71(24 Suppl):Abstract nr P5-16-01.
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Affiliation(s)
- N Betambeau
- 1Cheltenham General Hospital, Cheltenham, Gloucestershire, United Kingdom
| | - C Chan
- 1Cheltenham General Hospital, Cheltenham, Gloucestershire, United Kingdom
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231
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Yuling W, Qi L, Szeto G, Chan C. Effects on cardiovascular response, perceived stress and cervical muscle activation during physical and mental conditions in computer users. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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232
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Franssen B, Chan C, Ramírez-Del Val A, Llamas F, López-Tello A. [Renal cell carcinoma metastatic to the duodenum and Vater ampulla: report of two cases]. Rev Gastroenterol Mex 2011; 76:375-379. [PMID: 22188966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
These two cases of metastatic renal cell carcinoma to the duodenum, adds to the limited experience reported in the literature. Both patients initially presented with upper gastrointestinal bleeding years after they had a nephrectomy. After an extensive diagnostic work-up, they were both submitted to a classic pancreaticoduodenectomy (Whipple's procedure). Only the final histopathological report revealed the diagnosis. Basic recommendations on diagnosis and treatment are discussed in this article and a review of the literature is given.
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Affiliation(s)
- B Franssen
- Departamento de Cirugía, Instituto Nacional de Ciencias Médicas y Nutrición Salvador, Zubirán
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233
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Franssen B, Chan C. [Pancreatic cancer: the surgeon's point of view]. Rev Gastroenterol Mex 2011; 76:353-361. [PMID: 22188961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
INTRODUCTION Pancreatic adenocarcinoma (PA) is not only one of the most common gastrointestinal tumors, but also the most lethal. OBJECTIVE Give a comprehensive and up-to-date panorama on pancreatic cancer with a surgical focus. METHODS A critical search was performed in Medline focusing on recent relevant publications, renowned authors, high impact publications and a preference for surgical literature in English. RESULTS In this article we review PA epidemiology, some aspects of molecular biology, clinical presentation, work-up, staging and current treatment options. CONCLUSIONS Patients affected must be studied appropriately and referred to specialized centers for surgical treatment, when indicated, in order to offer them the best chance for cure. Breakthroughs in management will probably include prevention, early diagnosis and molecular therapy.
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Affiliation(s)
- B Franssen
- Departamento de Cirugía. Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán
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234
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Ahmad N, Chan C, Thomas GN, Gill P. P2-494 Differential outcome and treatment rates for peripheral vascular disease in the black, Asian and White British population: secondary analysis of English hospital data 2003-2009. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976m.21] [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: 11/03/2022]
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Yip C, Cheng H, Cheung F, Chan C. SU-E-T-89: Comparison of a Liquid Ionization Chamber with a Diamond Detector for Relatively Small Photon Field Measurements. Med Phys 2011. [DOI: 10.1118/1.3612040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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237
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Ahmad N, Chan C. 464 VARYING PROPORTIONS OF PERIPHERAL VASCULAR DISEASE INTERVENTIONS COMPARED WITH CORONARY VASCULAR DISEASE IN ENGLAND.IMPLICATIONS FOR THE AETIOPATHOLOGY OF ATHEROSCLEROSIS? ATHEROSCLEROSIS SUPP 2011. [DOI: 10.1016/s1567-5688(11)70465-2] [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: 11/25/2022]
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238
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Elliott J, Chan C, Daly M, Chan W, Saireddy R, Milburn K, Troughton R, Bridgman P. When the Earth Quakes, the Heart Breaks: Stress Cardiomyopathy After a 6.3 Earthquake. Heart Lung Circ 2011. [DOI: 10.1016/j.hlc.2011.03.021] [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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239
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Lai MT, Hua CH, Tsai MH, Wan L, Lin YJ, Chen CM, Chiu IW, Chan C, Tsai FJ, Jinn-Chyuan Sheu J. Talin-1 overexpression defines high risk for aggressive oral squamous cell carcinoma and promotes cancer metastasis. J Pathol 2011; 224:367-76. [PMID: 21547905 DOI: 10.1002/path.2867] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Revised: 01/19/2011] [Accepted: 01/30/2011] [Indexed: 01/15/2023]
Abstract
Oral squamous cell carcinoma (OSCC) is highly invasive and is associated with frequent tumour recurrences and lymph node metastases. Identification of genes involved in the aggressiveness of OSCC may provide new targets for clinical intervention. A genome-wide study based on the Sty1 250K SNP array indicated the involvement of the Talin-1 (TLN1) gene in the 9p13.3 amplicon, which was further validated by dual colour fluorescence in situ hybridization (FISH). Comparative analyses revealed that TLN1 was the most highly expressed integrin-cytoskeleton cross-linker that can trigger integrin activation. IHC analyses and mouse study also revealed an association between TLN1 overexpression and advanced OSCC with invasion to adjacent tissues. Survival analyses indicated a significant association between TLN1 genetic gain/overexpression and a reduced overall survival in patients. Functional knockdown by a dominant negative TLN1 fragment reduced cell growth and invasiveness in TLN1-overexpressing cells via inactivation of downstream oncogenic signalling. The present study suggests an important role for TLN1 in oral cancer development. TLN1 overexpression could serve as a diagnostic marker for aggressive phenotypes and a potential target for treating OSCC.
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Affiliation(s)
- Ming-Tsung Lai
- Department of Pathology, Chung Shan Medical University Hospital, Taichung, Taiwan
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Horsnell J, Chan C, Bristol J, Court F, Stone N. Real Time Intraoperative Assessment of Axillary Lymph Nodes using Raman Spectroscopy. Eur J Surg Oncol 2011. [DOI: 10.1016/j.ejso.2011.03.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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241
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Chan WLS, Hui E, Chan C, Cheung D, Wong S, Wong R, Li S, Woo J. Evaluation of chronic disease self-management programme (CDSMP) for older adults in Hong Kong. J Nutr Health Aging 2011; 15:209-14. [PMID: 21369669 DOI: 10.1007/s12603-010-0257-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVES To evaluate the locally-adapted CDSMP for older adults with chronic diseases in Hong Kong in the primary care setting. DESIGN A longitudinal, quasi-experimental study. SETTING Community-based and primary care setting. PARTICIPANTS Seven hundred and seventy-two participants aged 55 or above with at least one chronic disease and were living in the community. INTERVENTION The 6-weeks programme consisted of 6 group sessions, with each session lasting for 2.5 hours. Trained professional and elder lay leaders facilitated participants to gain essential self-management knowledge and skills for the effective management of chronic diseases. MEASUREMENTS At baseline and 6 months, four categories of outcome measures were documented, covering self-management behaviours, self-efficacy, health status, and health care utilization. RESULTS 302 and 298 participants in the intervention and control groups completed 6 months follow-up respectively. Participants in the intervention group reported significant improvements in all self-management behaviours and self-efficacy measures, and 5 health status measures (social role limitation, depressive symptoms, health distress, symptoms of pain and discomfort, and self-rated health) when compared with those in the control group. CONCLUSIONS The locally-adapted CDSMP may improve self-management behaviours, self-efficacy and health status among older adults with chronic diseases in Hong Kong. CDSMP may be integrated into primary care services for older adults.
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Affiliation(s)
- W L S Chan
- Department of Medicine and Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong.
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242
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Snyder LD, Medinas R, Chan C, Sparks S, Davis W, Palmer SM, Weinhold KJ. Polyfunctional cytomegalovirus-specific immunity in lung transplant recipients receiving valganciclovir prophylaxis. Am J Transplant 2011; 11:553-60. [PMID: 21219584 PMCID: PMC3044779 DOI: 10.1111/j.1600-6143.2010.03405.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [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: 01/25/2023]
Abstract
Cytomegalovirus (CMV) is a common opportunistic infection after lung transplant. Despite effective antiviral medications to treat CMV, invasive CMV disease contributes to lung allograft dysfunction and worse survival. Efforts to prevent CMV have led to the use of valganciclovir prophylaxis for increasingly longer periods after transplant. A pivotal concern with long-term antiviral prophylaxis is that it may prevent or delay the development of CMV-specific immunity and increase the subsequent risk of late onset disease. To address this issue, we conducted a pilot study to determine if CMV-specific immunity was detectable in lung transplant recipients at risk for CMV while on antiviral prophylaxis. Utilizing polychromatic flow cytometry panels, CMV-specific immunity was determined by peripheral blood CD4 and CD8 T cell expression of cytokines in response to the HLA restricted CMV peptides pp65 and IE-1. We determined CMV seropositive lung transplant recipients on valganciclovir for a median of 6 months from transplant have a detectable polyfunctional CMV-specific T cell response which is comparable to seropositive recipients not on antiviral medications and to healthy seropositive nontransplant controls. Thus, valganciclovir prophylaxis does not appear to impair the development of CMV-specific immunity in lung transplantation.
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Affiliation(s)
- L. D. Snyder
- Department of Medicine, Duke University, Durham, North Carolina
| | - R. Medinas
- Surgery and Immunology, Duke University, Durham, North Carolina
| | - C. Chan
- Department of Biostatistics & Bioinformatics, Duke University, Durham, North Carolina
| | - S. Sparks
- Surgery and Immunology, Duke University, Durham, North Carolina
| | - W.A. Davis
- Department of Medicine, Duke University, Durham, North Carolina
| | - S. M. Palmer
- Department of Medicine, Duke University, Durham, North Carolina
| | - K. J. Weinhold
- Surgery and Immunology, Duke University, Durham, North Carolina
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Glenzer SH, MacGowan BJ, Meezan NB, Adams PA, Alfonso JB, Alger ET, Alherz Z, Alvarez LF, Alvarez SS, Amick PV, Andersson KS, Andrews SD, Antonini GJ, Arnold PA, Atkinson DP, Auyang L, Azevedo SG, Balaoing BNM, Baltz JA, Barbosa F, Bardsley GW, Barker DA, Barnes AI, Baron A, Beeler RG, Beeman BV, Belk LR, Bell JC, Bell PM, Berger RL, Bergonia MA, Bernardez LJ, Berzins LV, Bettenhausen RC, Bezerides L, Bhandarkar SD, Bishop CL, Bond EJ, Bopp DR, Borgman JA, Bower JR, Bowers GA, Bowers MW, Boyle DT, Bradley DK, Bragg JL, Braucht J, Brinkerhoff DL, Browning DF, Brunton GK, Burkhart SC, Burns SR, Burns KE, Burr B, Burrows LM, Butlin RK, Cahayag NJ, Callahan DA, Cardinale PS, Carey RW, Carlson JW, Casey AD, Castro C, Celeste JR, Chakicherla AY, Chambers FW, Chan C, Chandrasekaran H, Chang C, Chapman RF, Charron K, Chen Y, Christensen MJ, Churby AJ, Clancy TJ, Cline BD, Clowdus LC, Cocherell DG, Coffield FE, Cohen SJ, Costa RL, Cox JR, Curnow GM, Dailey MJ, Danforth PM, Darbee R, Datte PS, Davis JA, Deis GA, Demaret RD, Dewald EL, Di Nicola P, Di Nicola JM, Divol L, Dixit S, Dobson DB, Doppner T, Driscoll JD, Dugorepec J, Duncan JJ, Dupuy PC, Dzenitis EG, Eckart MJ, Edson SL, Edwards GJ, Edwards MJ, Edwards OD, Edwards PW, Ellefson JC, Ellerbee CH, Erbert GV, Estes CM, Fabyan WJ, Fallejo RN, Fedorov M, Felker B, Fink JT, Finney MD, Finnie LF, Fischer MJ, Fisher JM, Fishler BT, Florio JW, Forsman A, Foxworthy CB, Franks RM, Frazier T, Frieder G, Fung T, Gawinski GN, Gibson CR, Giraldez E, Glenn SM, Golick BP, Gonzales H, Gonzales SA, Gonzalez MJ, Griffin KL, Grippen J, Gross SM, Gschweng PH, Gururangan G, Gu K, Haan SW, Hahn SR, Haid BJ, Hamblen JE, Hammel BA, Hamza AV, Hardy DL, Hart DR, Hartley RG, Haynam CA, Heestand GM, Hermann MR, Hermes GL, Hey DS, Hibbard RL, Hicks DG, Hinkel DE, Hipple DL, Hitchcock JD, Hodtwalker DL, Holder JP, Hollis JD, Holtmeier GM, Huber SR, Huey AW, Hulsey DN, Hunter SL, Huppler TR, Hutton MS, Izumi N, Jackson JL, Jackson MA, Jancaitis KS, Jedlovec DR, Johnson B, Johnson MC, Johnson T, Johnston MP, Jones OS, Kalantar DH, Kamperschroer JH, Kauffman RL, Keating GA, Kegelmeyer LM, Kenitzer SL, Kimbrough JR, King K, Kirkwood RK, Klingmann JL, Knittel KM, Kohut TR, Koka KG, Kramer SW, Krammen JE, Krauter KG, Krauter GW, Krieger EK, Kroll JJ, La Fortune KN, Lagin LJ, Lakamsani VK, Landen OL, Lane SW, Langdon AB, Langer SH, Lao N, Larson DW, Latray D, Lau GT, Le Pape S, Lechleiter BL, Lee Y, Lee TL, Li J, Liebman JA, Lindl JD, Locke SF, Loey HK, London RA, Lopez FJ, Lord DM, Lowe-Webb RR, Lown JG, Ludwigsen AP, Lum NW, Lyons RR, Ma T, MacKinnon AJ, Magat MD, Maloy DT, Malsbury TN, Markham G, Marquez RM, Marsh AA, Marshall CD, Marshall SR, Maslennikov IL, Mathisen DG, Mauger GJ, Mauvais MY, McBride JA, McCarville T, McCloud JB, McGrew A, McHale B, MacPhee AG, Meeker JF, Merill JS, Mertens EP, Michel PA, Miller MG, Mills T, Milovich JL, Miramontes R, Montesanti RC, Montoya MM, Moody J, Moody JD, Moreno KA, Morris J, Morriston KM, Nelson JR, Neto M, Neumann JD, Ng E, Ngo QM, Olejniczak BL, Olson RE, Orsi NL, Owens MW, Padilla EH, Pannell TM, Parham TG, Patterson RW, Pavel G, Prasad RR, Pendlton D, Penko FA, Pepmeier BL, Petersen DE, Phillips TW, Pigg D, Piston KW, Pletcher KD, Powell CL, Radousky HB, Raimondi BS, Ralph JE, Rampke RL, Reed RK, Reid WA, Rekow VV, Reynolds JL, Rhodes JJ, Richardson MJ, Rinnert RJ, Riordan BP, Rivenes AS, Rivera AT, Roberts CJ, Robinson JA, Robinson RB, Robison SR, Rodriguez OR, Rogers SP, Rosen MD, Ross GF, Runkel M, Runtal AS, Sacks RA, Sailors SF, Salmon JT, Salmonson JD, Saunders RL, Schaffer JR, Schindler TM, Schmitt MJ, Schneider MB, Segraves KS, Shaw MJ, Sheldrick ME, Shelton RT, Shiflett MK, Shiromizu SJ, Shor M, Silva LL, Silva SA, Skulina KM, Smauley DA, Smith BE, Smith LK, Solomon AL, Sommer S, Soto JG, Spafford NI, Speck DE, Springer PT, Stadermann M, Stanley F, Stone TG, Stout EA, Stratton PL, Strausser RJ, Suter LJ, Sweet W, Swisher MF, Tappero JD, Tassano JB, Taylor JS, Tekle EA, Thai C, Thomas CA, Thomas A, Throop AL, Tietbohl GL, Tillman JM, Town RPJ, Townsend SL, Tribbey KL, Trummer D, Truong J, Vaher J, Valadez M, Van Arsdall P, Van Prooyen AJ, Vergel de Dios EO, Vergino MD, Vernon SP, Vickers JL, Villanueva GT, Vitalich MA, Vonhof SA, Wade FE, Wallace RJ, Warren CT, Warrick AL, Watkins J, Weaver S, Wegner PJ, Weingart MA, Wen J, White KS, Whitman PK, Widmann K, Widmayer CC, Wilhelmsen K, Williams EA, Williams WH, Willis L, Wilson EF, Wilson BA, Witte MC, Work K, Yang PS, Young BK, Youngblood KP, Zacharias RA, Zaleski T, Zapata PG, Zhang H, Zielinski JS, Kline JL, Kyrala GA, Niemann C, Kilkenny JD, Nikroo A, Van Wonterghem BM, Atherton LJ, Moses EI. Demonstration of ignition radiation temperatures in indirect-drive inertial confinement fusion hohlraums. Phys Rev Lett 2011; 106:085004. [PMID: 21405580 DOI: 10.1103/physrevlett.106.085004] [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] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Indexed: 05/30/2023]
Abstract
We demonstrate the hohlraum radiation temperature and symmetry required for ignition-scale inertial confinement fusion capsule implosions. Cryogenic gas-filled hohlraums with 2.2 mm-diameter capsules are heated with unprecedented laser energies of 1.2 MJ delivered by 192 ultraviolet laser beams on the National Ignition Facility. Laser backscatter measurements show that these hohlraums absorb 87% to 91% of the incident laser power resulting in peak radiation temperatures of T(RAD)=300 eV and a symmetric implosion to a 100 μm diameter hot core.
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Affiliation(s)
- S H Glenzer
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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Kozak AT, Daviglus ML, Chan C, Kiefe CI, Jacobs DR, Liu K. Relationship of body mass index in young adulthood and health-related quality of life two decades later: the Coronary Artery Risk Development in Young Adults study. Int J Obes (Lond) 2011; 35:134-41. [PMID: 20548305 PMCID: PMC3875360 DOI: 10.1038/ijo.2010.120] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVE The expanding overweight and obesity epidemic notwithstanding, little is known about their long-term effect on health-related quality of life (HRQoL). The main objective of this study was to investigate whether overweight (body mass index (BMI) 25 to <30 kg m(-2)) and obese (BMI ≥ 30 kg m(-2)) young adults have poorer HRQoL 20 years later. METHODS We studied 3014 participants in the Coronary Artery Risk Development in Young Adults (CARDIA) study, a longitudinal, community-dwelling, biracial cohort from four cities. BMI was measured at baseline and 20 years later. HRQoL was assessed by the Physical Component Summary (PCS) and the Mental Component Summary (MCS) scores of the Medical Outcomes Study 12-Item Short-Form Health Survey at year 20. Higher PCS or MCS scores indicate better HRQoL. RESULTS Mean year 20 PCS score was 52.2 for normal weight participants at baseline, 50.3 for overweight and 46.4 for obese (P-trend <0.001). This relation persisted after adjustment for baseline demographics, general health, and physical and behavioral risk factors and after further adjustment for 20-year changes in risk factors. No association was observed for MCS scores (P-trend 0.43). CONCLUSION Overweight and obesity in early adulthood are adversely associated with self-reported physical HRQoL, but not mental HRQoL 20 years later.
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Affiliation(s)
- A T Kozak
- Department of Psychology, Oakland University, Rochester, MI 48309, USA.
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245
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Chan C, Crozier I, Bridgman P, Lainchbury J, Elliott J, Troughton R, Blake J, McClean D, Melton I, Smyth D. Cardiology Admissions Following the 2010 and 2011 Christchurch Earthquakes. Heart Lung Circ 2011. [DOI: 10.1016/j.hlc.2011.05.495] [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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246
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Zarifeh J, Mulder R, Kerr A, Chan C, Bridgman P. The Psychology of Earthquake Stress Cardiomyopathy, Non-cardiac Chest Pain and Myocardial Infarction. Heart Lung Circ 2011. [DOI: 10.1016/j.hlc.2011.05.109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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247
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Elliott J, Chan C, Chan W, Daly M, Milburn K, Saireddy R, van Wyk P, Troughton R, Bridgman P. Multiple Cases of Stress Cardiomyopathy after a Destructive Earthquake: When the Earthquakes, the Heart Breaks. Heart Lung Circ 2011. [DOI: 10.1016/j.hlc.2011.05.514] [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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248
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Tan K, Fung CS, Jankova L, Dent O, Robertson G, Molloy M, Chapuis P, Bokey E, Clarke S, Lin B, Chan C. 50. Clinicopathological correlates and prognostic significance of glutathione S-transferase PI (GSTP) expression in 469 patients after potentially curative resection of node-positive colonic cancer. Pathology 2011. [DOI: 10.1016/s0031-3025(16)33338-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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249
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Chowdhury F, Tutt AL, Chan C, Glennie M, Johnson PW. Development, validation and application of ELISAs for pharmacokinetic and HACA assessment of a chimeric anti-CD40 monoclonal antibody in human serum. J Immunol Methods 2010; 363:1-8. [PMID: 20869964 DOI: 10.1016/j.jim.2010.09.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2010] [Revised: 09/07/2010] [Accepted: 09/16/2010] [Indexed: 11/22/2022]
Abstract
As part of a Phase I chimeric anti-CD40 monoclonal antibody clinical trial, two enzyme-linked immunosorbent assays (ELISAs) were developed for secondary endpoints: 1) for the pharmacokinetic (PK) monitoring of serum antibody levels and 2) for immunogenic screening of human anti-chimeric antibody (HACA) responses. The ELISA is a well established immunoassay, with clear guidelines for validation when used as a quantitative assay. However, these parameters may not always be relevant for a semi-quantitative assay used to assess whether a sample is positive or negative for a novel marker such as an antibody developed against a therapeutic antibody. We report here the development of a quantitative PK ELISA and a semi-quantitative HACA ELISA, and the different approaches of validation to prove each assay are 'fit for purpose.' The parameters of linearity (R²>0.99), accuracy (±30%), lowest level of detection (4 μg/ml), intra-assay (coefficient of variation (CV) <20%) and inter-assay (CV<20%) variability were assessed for the quantitative PK assay. For the semi-quantitative HACA assay, parameters of linearity (R²>0.99), lowest level of detection, intra (CV<10%) and inter-assay (CV<30%) variability were assessed using a surrogate positive control. The validation outcome showed that each assay was robust, reliable and accurate to meet the requirements of the intended analytical application, that being to 1) quantitatively determine the concentration of antibody in the serum and 2) determine whether a sample is positive or negative for human anti-chimeric antibodies. Each assay has been successfully translated for use in a clinical trial with adequate quality controls and acceptance criteria set for monitoring consistency and performance.
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Affiliation(s)
- F Chowdhury
- Cancer Sciences Division, CRUK Clinical Centre, University of Southampton, Southampton, SO16 6YD, UK.
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Edwards A, Pang N, Shiu V, Chan C. The understanding of spirituality and the potential role of spiritual care in end-of-life and palliative care: a meta-study of qualitative research. Palliat Med 2010; 24:753-70. [PMID: 20659977 DOI: 10.1177/0269216310375860] [Citation(s) in RCA: 217] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Spirituality and spiritual care are gaining increasing attention but their potential contribution to palliative care remains unclear. The aim of this study was to synthesize qualitative literature on spirituality and spiritual care at the end of life using a systematic ('meta-study') review. Eleven patient articles and eight with healthcare providers were included, incorporating data from 178 patients and 116 healthcare providers, mainly from elderly White and Judaeo-Christian origin patients with cancer. Spirituality principally focused on relationships, rather than just meaning making, and was given as a relationship. Spirituality was a broader term that may or may not encompass religion. A 'spirit to spirit' framework for spiritual care-giving respects individual personhood. This was achieved in the way physical care was given, by focusing on presence, journeying together, listening, connecting, creating openings, and engaging in reciprocal sharing. Affirmative relationships supported patients, enabling them to respond to their spiritual needs. The engagement of family caregivers in spiritual care appears underutilized. Relationships formed an integral part of spirituality as they were a spiritual need, caused spiritual distress when broken and were the way spiritual care was given. Barriers to spiritual care include lack of time, personal, cultural or institutional factors, and professional educational needs. By addressing these, we may make an important contribution to the improvement of patient care towards the end of life.
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Affiliation(s)
- A Edwards
- Clinical Epidemiology Interdisciplinary Research Group, Department of Primary Care and Public Health, Cardiff University, Cardiff, UK.
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