1
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Grzadzinski R, Jatkar A, Donovan K, Truong K, Holbrook A, Lord C, Kim SH. Examining Treatment Outcomes Across Contexts: How Do Child Baseline Characteristics Impact Measurement of Treatment Response? J Autism Dev Disord 2023; 53:4121-4131. [PMID: 35969334 PMCID: PMC9969996 DOI: 10.1007/s10803-022-05655-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/16/2022] [Indexed: 10/15/2022]
Abstract
The evaluation of the overlap between the ADOS BOSCC and Standard BOSCC as well as the exploration of child characteristics that may predict change are important steps in consolidating data-driven definitions of "improvement". Participants were seen between 2 and 5 times with Standard BOSCC and ADOS BOSCC observations over the course of early intervention trials (Grzadzinski et al. in J Autism Dev Disord 46:2464, 2016; Kim et al. in Autism 23:5, 2019). Results showed consistency between the Standard BOSCC and ADOS BOSCC, highlighting the utility of both as metrics of change and treatment outcome across contexts. Baseline characteristics may play a role in the tailoring of early intervention to maximize treatment outcome and may offer guidance when determining which outcome measures to use.
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Affiliation(s)
- Rebecca Grzadzinski
- Carolina Institute for Developmental Disabilities, University of North Carolina, Chapel Hill, NC, USA
- Program for Early Autism Research Leadership and Service (PEARLS), University of North Carolina, Chapel Hill, NC, USA
| | - Alapika Jatkar
- Carolina Institute for Developmental Disabilities, University of North Carolina, Chapel Hill, NC, USA
| | - Kevin Donovan
- Penn Statistics in Imaging and Visualization Endeavor (PennSIVE), Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, USA
| | - Kinh Truong
- Gillings School of Global Public Health, Department of Biostatistics, Chapel Hill, USA
| | | | - Catherine Lord
- Semel Institute for Neuroscience and Human Behavior, University of California at Los Angeles, Los Angeles, USA
| | - So Hyun Kim
- School of Psychology, Korea University, Seoul, South Korea.
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2
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Sultanbawa Y, Smyth HE, Truong K, Chapman J, Cozzolino D. Insights on the role of chemometrics and vibrational spectroscopy in fruit metabolite analysis. Food Chem (Oxf) 2021; 3:100033. [PMID: 35415666 PMCID: PMC8991517 DOI: 10.1016/j.fochms.2021.100033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 06/23/2021] [Accepted: 07/09/2021] [Indexed: 12/03/2022]
Abstract
The use of vibrational spectroscopy combined with data analytics is discussed. The measure of bioactive compounds metabolites in fruit samples is presented. Advantages and limitations of these techniques are discussed.
The last three decades have demonstrated the ability of combining data analytics (e.g. big data, machine learning) with modern analytical instrumental techniques such as vibrational spectroscopy (VIBSPEC) (e.g. NIR, Raman, MIR) and sensing technologies (e.g. electronic noses and tongues, colorimetric sensors) to analyse, measure and monitor a wide range of properties and samples. Developments in instrumentation, hardware and software have placed VIBSPEC as a useful tool to quantify several bioactive compounds and metabolites in a wide range of fruit and plant samples. With the incorporation of hand-held and portable instrumentation, these techniques have been valuable for the development of in-field and high throughput applications, opened new frontiers of analysis in fruits and plants. This review will present and discuss some of the current applications on the use of VIBSPEC techniques combined with data analytics on the measurement bioactive compounds and plant metabolites in different fruit samples.
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Affiliation(s)
- Y Sultanbawa
- ARC Industrial Transformation Training Centre for Uniquely Australian Foods, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Coopers Plains, QLD 4108, Australia.,Centre for Nutrition and Food Sciences, Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, Brisbane, Queensland 4072, Australia
| | - H E Smyth
- ARC Industrial Transformation Training Centre for Uniquely Australian Foods, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Coopers Plains, QLD 4108, Australia
| | - K Truong
- Nanobiotechnology Laboratory, School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, VIC 3001, Australia
| | - J Chapman
- Nanobiotechnology Laboratory, School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, VIC 3001, Australia
| | - D Cozzolino
- ARC Industrial Transformation Training Centre for Uniquely Australian Foods, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Coopers Plains, QLD 4108, Australia
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3
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Truong K, Goldinger S, Kim J, Smith A, Fernandez-Peñas P. Toxic epidermal necrolysis-like lupus erythematosus: a condition to exclude in all patients with possible Stevens-Johnson syndrome/toxic epidermal necrolysis. J Eur Acad Dermatol Venereol 2021; 36:e218-e221. [PMID: 34661931 DOI: 10.1111/jdv.17753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 09/18/2021] [Accepted: 10/15/2021] [Indexed: 11/27/2022]
Affiliation(s)
- K Truong
- Department of Dermatology, Westmead Hospital, Westmead, NSW, Australia.,Sydney Medical School, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
| | - S Goldinger
- Department of Dermatology, Westmead Hospital, Westmead, NSW, Australia
| | - J Kim
- Department of Tissue Pathology and Diagnostic Oncology, Institute of Clinical Pathology and Medical Research, ICPMR) Westmead Hospital, Westmead, NSW, Australia
| | - A Smith
- Department of Dermatology, Westmead Hospital, Westmead, NSW, Australia
| | - P Fernandez-Peñas
- Department of Dermatology, Westmead Hospital, Westmead, NSW, Australia.,Sydney Medical School, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
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Cernasov P, Walsh EC, Kinard JL, Kelley L, Phillips R, Pisoni A, Eisenlohr-Moul TA, Arnold M, Lowery SC, Ammirato M, Truong K, Nagy GA, Oliver JA, Haworth K, Smoski M, Dichter GS. Multilevel growth curve analyses of behavioral activation for anhedonia (BATA) and mindfulness-based cognitive therapy effects on anhedonia and resting-state functional connectivity: Interim results of a randomized trial ✰. J Affect Disord 2021; 292:161-171. [PMID: 34126308 PMCID: PMC8282772 DOI: 10.1016/j.jad.2021.05.054] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 05/03/2021] [Accepted: 05/23/2021] [Indexed: 12/18/2022]
Abstract
BACKGROUND The neural mechanisms associated with anhedonia treatment response are poorly understood. Additionally, no study has investigated changes in resting-state functional connectivity (rsFC) accompanying psychosocial treatment for anhedonia. METHODS We evaluated a novel psychotherapy, Behavioral Activation Therapy for Anhedonia (BATA, n = 38) relative to Mindfulness-Based Cognitive Therapy (MBCT, n = 35) in a medication-free, transdiagnostic, anhedonic sample in a parallel randomized controlled trial. Participants completed up to 15 sessions of therapy and up to four 7T MRI scans before, during, and after treatment (n = 185 scans). Growth curve models estimated change over time in anhedonia and in rsFC using average region-of-interest (ROI)-to-ROI connectivity within the default mode network (DMN), frontoparietal network (FPN), salience network, and reward network. Changes in rsFC from pre- to post-treatment were further evaluated using whole-network seed-to-voxel and ROI-to-ROI edgewise analyses. RESULTS Growth curve models showed significant reductions in anhedonia symptoms and in average rsFC within the DMN and FPN over time, across BATA and MBCT. There were no differences in anhedonia reductions between treatments. Within-person, changes in average rsFC were unrelated to changes in anhedonia. Between-person, higher than average FPN rsFC was related to less anhedonia across timepoints. Seed-to-voxel and edgewise rsFC analyses corroborated reductions within the DMN and between the DMN and FPN over time, across the sample. CONCLUSIONS Reductions in rsFC within the DMN, FPN, and between these networks co-occurred with anhedonia improvement across two psychosocial treatments for anhedonia. Future anhedonia clinical trials with a waitlist control group should disambiguate treatment versus time-related effects on rsFC.
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Affiliation(s)
- Paul Cernasov
- Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514, USA
| | - Erin C. Walsh
- Department of Psychiatry, University of North Carolina-Chapel Hill, Chapel Hill, NC 57514, USA
| | - Jessica L. Kinard
- Carolina Institute for Developmental Disabilities, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, Chapel Hill, NC 27510, USA., Division of Speech and Hearing Sciences, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514, USA
| | - Lisalynn Kelley
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC 27705, USA
| | - Rachel Phillips
- Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514, USA
| | - Angela Pisoni
- Department of Psychology and Neuroscience, Duke University, Durham, NC 27505, USA
| | - Tory A. Eisenlohr-Moul
- Department of Psychiatry, University of Illinois at Chicago, Neuropsychiatry Institute, Chicago, IL 60612, USA
| | - Macey Arnold
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC 27705, USA
| | - Sarah C. Lowery
- Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514, USA
| | - Marcy Ammirato
- Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514, USA
| | - Kinh Truong
- Department of Biostatistics, University of North Carolina-Chapel Hill, Chapel Hill, NC, 27514, USA
| | - Gabriela A. Nagy
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC 27705, USA., Duke University School of Nursing, 307 Trent Drive, Durham, NC 27710
| | - Jason A. Oliver
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC 27705, USA., Division of Cancer Control and Population Sciences, Duke Cancer Institute, Durham, NC 27705, USA
| | - Kevin Haworth
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC 27705, USA
| | - Moria Smoski
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC 27705, USA., Department of Psychology and Neuroscience, Duke University, Durham, NC 27505, USA
| | - Gabriel S. Dichter
- Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514, USA., Department of Psychiatry, University of North Carolina-Chapel Hill, Chapel Hill, NC 57514, USA., Carolina Institute for Developmental Disabilities, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, Chapel Hill, NC 27510, USA.,corresponding author
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5
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Truong K, Meier K, Nikolajsen L, van Tulder MW, Sørensen JCH, Rasmussen MM. Cryoneurolysis' outcome on pain experience (COPE) in patients with low-back pain: study protocol for a single-blinded randomized controlled trial. BMC Musculoskelet Disord 2021; 22:458. [PMID: 34011351 PMCID: PMC8135178 DOI: 10.1186/s12891-021-04320-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Accepted: 05/05/2021] [Indexed: 11/26/2022] Open
Abstract
Background Low-back pain, including facet joint pain, accounts for up to 20 % of all sick leaves in DenmarkA proposed treatment option is cryoneurolysis. This study aims to investigate the effect of cryoneurolysis in lumbar facet joint pain syndrome. Methods A single-center randomized controlled trial (RCT) is performed including 120 participants with chronic facet joint pain syndrome, referred to the Department of Neurosurgery, Aarhus University Hospital. Eligible patients receive a diagnostic anesthetic block, where a reduction of pain intensity ≥ 50 % on a numerical rating scale (NRS) is required to be enrolled. Participants are randomized into three groups to undergo either one treatment of cryoneurolysis, radiofrequency ablation or placebo. Fluoroscopy and sensory stimulation is used to identify the intended target nerve prior to administrating the above-mentioned treatments. All groups receive physiotherapy for 6 weeks, starting 4 weeks after treatment. The primary outcome is the patients’ impression of change in pain after intervention (Patient Global Impression of Change (PGIC)) at 4 weeks follow-up, prior to physiotherapy. Secondary outcomes are a reduction in low-back pain intensity (numeric rating scale) and quality of life (EQ-5D, SF-36) and level of function (Oswestry Disability Index), psychological perception of pain (Pain Catastrophizing Scale) and depression status (Major Depression Inventory). Data will be assessed at baseline (T0), randomization (T1), day one (T2), 4 weeks (T3), 3 (T4), 6 (T5) and 12 months (T6). Discussion This study will provide information on the effectiveness of cryoneurolysis vs. the effectiveness of radiofrequency ablation or placebo for patients with facet joint pain, and help to establish whether cryoneurolysis should be implemented in clinical practice for this patient population. Trial registration The trial is approved by the ethical committee of Central Jutland Denmark with registration number 1-10-72-27-19 and the Danish Data Protection Agency with registration number 666,852. The study is registered at Clinicaltrial.gov with the ID number NCT04786145.
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Affiliation(s)
- K Truong
- Department of Neurosurgery, Aarhus University Hospital, Aarhus, Denmark. .,Center for Experimental Neuroscience (CENSE) and CENSE-spine, Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark.
| | - K Meier
- Department of Neurosurgery, Aarhus University Hospital, Aarhus, Denmark.,Center for Experimental Neuroscience (CENSE) and CENSE-spine, Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark.,Department of Anesthesiology, Aarhus University Hospital, Aarhus, Denmark
| | - L Nikolajsen
- Department of Anesthesiology, Aarhus University Hospital, Aarhus, Denmark
| | - M W van Tulder
- Department of Physiotherapy & Occupational Therapy, Aarhus University Hospital, Aarhus, Denmark.,Department of Human Movement Sciences, Faculty of Behavioral and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
| | - J C H Sørensen
- Department of Neurosurgery, Aarhus University Hospital, Aarhus, Denmark.,Center for Experimental Neuroscience (CENSE) and CENSE-spine, Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - M M Rasmussen
- Department of Neurosurgery, Aarhus University Hospital, Aarhus, Denmark.,Center for Experimental Neuroscience (CENSE) and CENSE-spine, Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark
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6
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Grzadzinski R, Donovan K, Truong K, Nowell S, Lee H, Sideris J, Turner-Brown L, Baranek GT, Watson LR. Sensory Reactivity at 1 and 2 Years Old is Associated with ASD Severity During the Preschool Years. J Autism Dev Disord 2021; 50:3895-3904. [PMID: 32157566 DOI: 10.1007/s10803-020-04432-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Children with Autism Spectrum Disorder (ASD) often display atypical sensory reactivity within the first years of life, prior to a diagnosis. This study examined sensory reactivity patterns at 14 months, changes from 14 to 23 months, and later ASD severity at 3 to 5 years of age in children (n = 87) at elevated likelihood of ASD. Results indicated that observed hyporeactivity at 14 months and increases from 14 to 23 months were related to higher ASD severity during the preschool years. Parent report of hyperreactivity at 14 months was associated with higher ASD severity in the RRB domain during the preschool years. Early hypo and hyperreactivity may predict later severity of ASD and aid in subtyping and developing individualized treatments.
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Affiliation(s)
- Rebecca Grzadzinski
- University of North Carolina, Carolina Institute for Developmental Disabilities, Chapel Hill, NC, USA.
| | - Kevin Donovan
- University of North Carolina, Department of Biostatistics, Chapel Hill, NC, USA
| | - Kinh Truong
- University of North Carolina, Department of Biostatistics, Chapel Hill, NC, USA
| | - Sallie Nowell
- University of North Carolina, Frank Porter Graham Child Development Institute, Chapel Hill, NC, USA
| | - Helen Lee
- Division of Occupational Science and Occupational Therapy, University of Southern California, Los Angeles, CA, USA
| | - John Sideris
- Division of Occupational Science and Occupational Therapy, University of Southern California, Los Angeles, CA, USA
| | | | - Grace T Baranek
- Division of Occupational Science and Occupational Therapy, University of Southern California, Los Angeles, CA, USA
| | - Linda R Watson
- University of North Carolina, Division of Speech and Hearing Sciences, Chapel Hill, NC, USA
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Zürcher NR, Walsh EC, Phillips RD, Cernasov PM, Tseng CEJ, Dharanikota A, Smith E, Li Z, Kinard JL, Bizzell JC, Greene RK, Dillon D, Pizzagalli DA, Izquierdo-Garcia D, Truong K, Lalush D, Hooker JM, Dichter GS. A simultaneous [ 11C]raclopride positron emission tomography and functional magnetic resonance imaging investigation of striatal dopamine binding in autism. Transl Psychiatry 2021; 11:33. [PMID: 33431841 PMCID: PMC7801430 DOI: 10.1038/s41398-020-01170-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 11/30/2020] [Accepted: 12/07/2020] [Indexed: 01/10/2023] Open
Abstract
The social motivation hypothesis of autism posits that autism spectrum disorder (ASD) is characterized by impaired motivation to seek out social experience early in life that interferes with the development of social functioning. This framework suggests that impaired mesolimbic dopamine function underlies compromised responses to social rewards in ASD. Although this hypothesis is supported by functional magnetic resonance imaging (fMRI) studies, no molecular imaging study has evaluated striatal dopamine functioning in response to rewards in ASD. Here, we examined striatal functioning during monetary incentive processing in ASD and controls using simultaneous positron emission tomography (PET) and fMRI. Using a bolus + infusion protocol with the D2/D3 dopamine receptor antagonist [11C]raclopride, voxel-wise binding potential (BPND) was compared between groups (controls = 12, ASD = 10) in the striatum. Striatal clusters showing significant between-group BPND differences were used as seeds in whole-brain fMRI general functional connectivity analyses. Relative to controls, the ASD group demonstrated decreased phasic dopamine release to incentives in the bilateral putamen and left caudate, as well as increased functional connectivity between a PET-derived right putamen seed and the precuneus and insula. Within the ASD group, decreased phasic dopamine release in the putamen was related to poorer theory-of-mind skills. Our findings that ASD is characterized by impaired striatal phasic dopamine release to incentives provide support for the social motivation hypothesis of autism. PET-fMRI may be a suitable tool to evaluate novel ASD therapeutics targeting the striatal dopamine system.
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Affiliation(s)
- Nicole R. Zürcher
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129 USA
| | - Erin C. Walsh
- grid.10698.360000000122483208Department of Psychiatry, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514 USA
| | - Rachel D. Phillips
- grid.10698.360000000122483208Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514 USA
| | - Paul M. Cernasov
- grid.10698.360000000122483208Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514 USA
| | - Chieh-En J. Tseng
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129 USA
| | - Ayarah Dharanikota
- grid.10698.360000000122483208Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC USA
| | - Eric Smith
- grid.10698.360000000122483208UNC-Chapel Hill Department of Radiology and Biomedical Research Imaging Center (BRIC), Chapel Hill, NC 27514 USA
| | - Zibo Li
- grid.10698.360000000122483208UNC-Chapel Hill Department of Radiology and Biomedical Research Imaging Center (BRIC), Chapel Hill, NC 27514 USA
| | - Jessica L. Kinard
- grid.10698.360000000122483208Carolina Institute for Developmental Disabilities, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, Chapel Hill, NC 27510 USA
| | - Joshua C. Bizzell
- grid.10698.360000000122483208Department of Psychiatry, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514 USA
| | - Rachel K. Greene
- grid.10698.360000000122483208Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514 USA
| | - Daniel Dillon
- grid.240206.20000 0000 8795 072XCenter for Depression, Anxiety and Stress Research, McLean Hospital, Belmont, MA USA
| | - Diego A. Pizzagalli
- grid.240206.20000 0000 8795 072XCenter for Depression, Anxiety and Stress Research, McLean Hospital, Belmont, MA USA
| | - David Izquierdo-Garcia
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129 USA
| | - Kinh Truong
- grid.10698.360000000122483208Department of Biostatistics, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514 USA
| | - David Lalush
- grid.10698.360000000122483208Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC USA
| | - Jacob M. Hooker
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129 USA
| | - Gabriel S. Dichter
- grid.10698.360000000122483208Department of Psychiatry, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514 USA ,grid.10698.360000000122483208Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514 USA ,grid.10698.360000000122483208Carolina Institute for Developmental Disabilities, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, Chapel Hill, NC 27510 USA
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Truong K, Venning V, Wain T, Chou S, Fernandez-Peñas P. Successful treatment of highly refractory necrobiotic xanthogranuloma with peginterferon alfa-2a. Clin Exp Dermatol 2021; 46:731-733. [PMID: 33222242 DOI: 10.1111/ced.14523] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/19/2020] [Indexed: 11/30/2022]
Affiliation(s)
- K Truong
- Departments of, Department of, Dermatology, Westmead Hospital, Sydney, NSW, Australia
| | - V Venning
- Departments of, Department of, Dermatology, Westmead Hospital, Sydney, NSW, Australia
| | - T Wain
- Departments of, Department of, Dermatology, Westmead Hospital, Sydney, NSW, Australia
| | - S Chou
- Department of, Tissue Pathology and Diagnostic Oncology, Westmead Hospital, Sydney, NSW, Australia
| | - P Fernandez-Peñas
- Departments of, Department of, Dermatology, Westmead Hospital, Sydney, NSW, Australia
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9
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Wong J, Chen X, Truong K. Engineering a temperature sensitive tobacco etch virus protease. Protein Eng Des Sel 2017; 30:705-712. [PMID: 29040785 DOI: 10.1093/protein/gzx050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Accepted: 08/26/2017] [Indexed: 11/12/2022] Open
Abstract
Since tobacco etch virus protease (TEVp) has a high specificity and efficiency in cleaving its target substrates, many groups have attempted to engineer conditional control of its activity. Temperature induction is widely used for modulating gene function because it has fast temporal response, good penetrability and applicability to many model organisms. Here, we engineered a temperature sensitive TEVp (tsTEVp) by using N-terminal truncations to TEVp that achieved efficient proteolysis on a timescale of 4 h after 30°C induction, while remaining relatively inactive at 37°C. As demonstration, tsTEVp was used to generate temperature-induced biological responses for protein translocation, protein degradation and Ca2+-mediated cellular blebbing. Lastly, tsTEVp and their engineered target substrates could find applications in engineered synthetic biological systems.
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Affiliation(s)
- J Wong
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario, Canada M5S 3G9
| | - X Chen
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario, Canada M5S 3G9
| | - K Truong
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario, Canada M5S 3G9.,Edward S. Rogers, Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Circle, Toronto, Ontario, Canada M5S 3G4
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10
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Nguyen T, Rajapakshe K, Chitsazzadeh V, Truong K, Schmults C, South A, Cho R, Coarfa C, Tsai K. 097 Genomic analysis reveals drivers of high-risk subsets of cutaneous squamous cell carcinoma. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.02.111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Truong K, Janssen A, Moore C, LaBond V. 326 Use of a Didactic Low Fidelity Simulated Model to Measure Objective Improvement in Corneal Foreign Body Removal. Ann Emerg Med 2016. [DOI: 10.1016/j.annemergmed.2016.08.342] [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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12
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Alleman M, Low E, Truong K, Huang E, Hill C, Chen T, Deaton M, Kingsley K. Dental pulp-derived stem cells (DPSC) differentiation in vitro into odontoblast and neuronal progenitors during cell passaging is associated with alterations in cell survival and viability. ACTA ACUST UNITED AC 2013. [DOI: 10.14194/ijmbr.226] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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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13
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Friis N, Lee AR, Truong K, Sabín C, Solano E, Johansson G, Fuentes I. Relativistic quantum teleportation with superconducting circuits. Phys Rev Lett 2013; 110:113602. [PMID: 25166531 DOI: 10.1103/physrevlett.110.113602] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Indexed: 06/03/2023]
Abstract
We study the effects of relativistic motion on quantum teleportation and propose a realizable experiment where our results can be tested. We compute bounds on the optimal fidelity of teleportation when one of the observers undergoes nonuniform motion for a finite time. The upper bound to the optimal fidelity is degraded due to the observer's motion. However, we discuss how this degradation can be corrected. These effects are observable for experimental parameters that are within reach of cutting-edge superconducting technology.
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Affiliation(s)
- N Friis
- School of Mathematical Sciences, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - A R Lee
- School of Mathematical Sciences, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - K Truong
- School of Mathematical Sciences, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - C Sabín
- School of Mathematical Sciences, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - E Solano
- Departamento de Química Física, Universidad del País Vasco UPV/EHU, Apartado 644, 48080 Bilbao, Spain and IKERBASQUE, Basque Foundation for Science, Alameda Urquijo 36, 48011 Bilbao, Spain
| | - G Johansson
- Microtechnology and Nanoscience, MC2, Chalmers University of Technology, S-41296 Göteborg, Sweden
| | - I Fuentes
- School of Mathematical Sciences, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
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Shaddick K, Burridge CP, Jerry DR, Schwartz TS, Truong K, Gilligan DM, Beheregaray LB. A hybrid zone and bidirectional introgression between two catadromous species: Australian bass Macquaria novemaculeata and estuary perch Macquaria colonorum. J Fish Biol 2011; 79:1214-1235. [PMID: 22026603 DOI: 10.1111/j.1095-8649.2011.03105.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The presence and distribution of hybrid individuals and the existence of a hybrid zone between the catadromous Australian bass Macquaria novemaculeata and estuary perch Macquaria colonorum were investigated throughout the range of both species in Australia. Bayesian analyses and genotypic simulations identified 140 putative hybrids (11·5% of the total sample) with varying levels of introgression. Most hybrids were observed in an area extending from the Snowy River to the Albert River suggesting a hybrid zone in the eastern Bass Strait region. Sixteen hybrids, however, were found outside this zone, possibly reflecting the movement of hybrid offspring between estuaries or their inadvertent release during fish stocking programmes. Biparental backcrossing was found to occur suggesting that hybrids were fertile. These results have implications for the management of the extensive stocking programme in M. novemaculeata and for understanding the potential role of habitat degradation and reduced water flow in facilitating hybridization in species with migratory life histories.
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Affiliation(s)
- K Shaddick
- Molecular Ecology Lab., Department of Biological Sciences, Macquarie University, Sydney, NSW 2109, Australia
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15
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Li I, Mills E, Truong K. A Computational Tool for Monte Carlo Simulations of Biomolecular Reaction Networks Modeled on Physical Principles. IEEE Trans Nanobioscience 2010; 9:24-30. [DOI: 10.1109/tnb.2009.2035114] [Citation(s) in RCA: 2] [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: 11/06/2022]
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Abstract
The intracellular calcium sensor protein calmodulin (CaM) interacts with a large number of proteins to regulate their biological functions in response to calcium stimulus. This molecular recognition process is diverse in its mechanism, but can be grouped into several classes based on structural and sequence information. We have developed a web-based database (http://calcium.uhnres.utoronto.ca/ctdb) for this family of proteins containing CaM binding sites or, as we propose to call it herein, CaM recruitment signaling (CRS) motifs. At present the CRS motif found in approximately 180 protein sequences in the databases can be divided into four subclasses, each subclass representing a distinct structural mode of molecular recognition involving CaM. The database can predict a putative CRS location within a given protein sequence, identify the subclass to which it may belong, and structural and biophysical parameters such as hydrophobicity, hydrophobic moment, and propensity for alpha-helix formation.
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Affiliation(s)
- K L Yap
- Division of Molecular and Structural Biology, Ontario Cancer Institute and Department of Medical Biophysics, University of Toronto, 610 University Avenue, Toronto, Ontario, M5G 2M9, Canada
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Abstract
During the first trimester of pregnancy, certain cytotrophoblastic cells (CTB) of anchoring villi invade the underlying decidua. Regulation of this invasive behaviour depends on cytokines and growth factors secreted by decidua and trophoblast, which modulate metalloproteinase (MMP) secretion of CTB. Since MMP-9 expression by CTB is a prerequisite for matrigel invasion and since the promoter region of the MMP-9 gene contains two AP-1 binding sites, we hypothesized, that transient activation of c-jun and c-fos oncogenes (which bind to form AP-1) by tumour necrosis factor (TNFalpha), or the phorbol ester TPA will promote the invasive phenotype of CTB and induce the production of MMP-9.TNFalpha or TPA when added to primary cultures of CTB increase MMP-9 activity and MMP-9 mRNA. This effect is inhibited by cycloheximide indicating the necessity of protein synthesis. TPA or TNFalpha induces also the binding of nuclear proteins (extracted from treated CTB) to a radiolabelled oligonucleotide corresponding to the consensus sequence of the TPA responsive element. Antibodies to Jun and Fos can displace this binding. Transient transfection of antisense mRNA to jun or fos into CTB inhibits the immunoreactivity and gelatinolytic activity of MMP-9. We conclude that AP-1 is necessary but may not be sufficient for transactivation of the MMP-9 gene in human CTB.
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Affiliation(s)
- P Bischof
- Department of Obstetrics and Gynaecology, University of Geneva, Box 232 Addenbrooke's Hospital, Maternité, Switzerland.
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Truong K, Sawano A, Mizuno H, Hama H, Tong KI, Mal TK, Miyawaki A, Ikura M. FRET-based in vivo Ca2+ imaging by a new calmodulin-GFP fusion molecule. Nat Struct Biol 2001; 8:1069-73. [PMID: 11702071 DOI: 10.1038/nsb728] [Citation(s) in RCA: 178] [Impact Index Per Article: 7.7] [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
Intracellular Ca2+ acts as a second messenger that regulates numerous physiological cellular phenomena including development, differentiation and apoptosis. Cameleons, a class of fluorescent indicators for Ca2+ based on green fluorescent proteins (GFPs) and calmodulin (CaM), have proven to be a useful tool in measuring free Ca2+ concentrations in living cells. Traditional cameleons, however, have a small dynamic range of fluorescence resonance energy transfer (FRET), making subtle changes in Ca2+ concentrations difficult to detect and study in some cells and organelles. Using the NMR structure of CaM bound to the CaM binding peptide derived from CaM-dependent kinase kinase (CKKp), we have rationally designed a new cameleon that displays a two-fold increase in the FRET dynamic range within the physiologically significant range of cytoplasmic Ca2+ concentration of 0.05-1 microM.
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Affiliation(s)
- K Truong
- Division of Molecular and Structural Biology, Ontario Cancer Institute and Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5G 2M9, Canada
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19
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Abstract
Intermolecular and intramolecular FRET between two spectrally overlapping green fluorescent protein variants fused to two different host proteins or at two different sites within the same protein offers a unique opportunity to monitor real-time protein-protein interactions or protein conformational changes. By using fluorescence digital imaging microscopy, one can visualize the location of green fluorescent proteins within a living cell and follow the time course of the changes in FRET corresponding to cellular events at a millisecond time resolution. The observation of such dynamic molecular events in vivo provides vital insight into the action of biological molecules.
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Affiliation(s)
- K Truong
- Division of Molecular and Structural Biology, Ontario Cancer Institute, Toronto, Canada
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20
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Truong K, Gerbault-Seureau M, Guilly MN, Vielh P, Zalcman G, Livartowski A, Chapelier A, Poupon MF, Dutrillaux B, Malfoy B. Quantitative fluorescence in situ hybridization in lung cancer as a diagnostic marker. J Mol Diagn 2001; 1:33-7. [PMID: 11272907 PMCID: PMC1906883 DOI: 10.1016/s1525-1578(10)60606-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The diagnosis of lung cancer is quite often hampered by the existence of various cell types within samples such as biopsies or pleural effusions. We have established a new marker for image cytometry of interphase tumor cells of the lung by using the most recurrent and early cytogenetic event in lung cancer, the loss of the short arm of chromosome 3. The method is based on the detection of the imbalance between the long and the short arms of chromosome 3 by performing two-color fluorescence in situ hybridization on both arms. Fourteen tumors were analyzed after short-term culture and compared with the corresponding cytogenetic data obtained from metaphase analysis. Results on interphase nuclei and control experiments on metaphases were the same, with imbalance ratios ranging from 1.0 to 2.0 (mean value 1.6, median 1.5). To assess the clinical significance of this approach, three pleural effusions were analyzed. Data showed that normal cells within the sample could have been distinguished from the tumor cells based on different imbalance values between the long and the short arms. Thus, our method allows refined detection of lung tumor cells within samples containing heterogeneous cell populations.
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MESH Headings
- Biomarkers, Tumor/genetics
- Carcinoma, Non-Small-Cell Lung/diagnosis
- Carcinoma, Non-Small-Cell Lung/genetics
- Carcinoma, Small Cell/diagnosis
- Carcinoma, Small Cell/genetics
- Chromosomes, Human, Pair 3/genetics
- Humans
- In Situ Hybridization, Fluorescence/methods
- Interphase/genetics
- Lung Neoplasms/diagnosis
- Lung Neoplasms/genetics
- Lung Neoplasms/pathology
- Metaphase/genetics
- Pleural Effusion, Malignant/diagnosis
- Pleural Effusion, Malignant/genetics
- Pleural Effusion, Malignant/pathology
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Affiliation(s)
- K Truong
- Cytogénétique Moléculaire et Oncologie, Centre National de Recherche Scientifique, Institut Curie, Paris, France.
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Aubert B, Boutigny D, De Bonis I, Gaillard JM, Jeremie A, Karyotakis Y, Lees JP, Robbe P, Tisserand V, Palano A, Chen GP, Chen JC, Qi ND, Rong G, Wang P, Zhu YS, Eigen G, Reinertsen PL, Stugu B, Abbott B, Abrams GS, Borgland AW, Breon AB, Brown DN, Button-Shafer J, Cahn RN, Clark AR, Dardin S, Day C, Dow SF, Elioff T, Fan Q, Gaponenko I, Gill MS, Goozen FR, Gowdy SJ, Gritsan A, Groysman Y, Jacobsen RG, Jared RC, Kadel RW, Kadyk J, Karcher A, Kerth LT, Kipnis I, Kluth S, Kolomensky YG, Kral JF, Lafever R, LeClerc C, Levi ME, Lewis SA, Lionberger C, Liu T, Long M, Lynch G, Marino M, Marks K, Meyer AB, Mokhtarani A, Momayezi M, Nyman M, Oddone PJ, Ohnemus J, Oshatz D, Patton S, Perazzo A, Peters C, Pope W, Pripstein M, Quarrie DR, Rasson JE, Roe NA, Romosan A, Ronan MT, Shelkov VG, Stone R, Telnov AV, von der Lippe H, Weber T, Wenzel WA, Zisman MS, Bright-Thomas PG, Harrison TJ, Hawkes CM, Kirk A, Knowles DJ, O'Neale SW, Watson AT, Watson NK, Deppermann T, Koch H, Krug J, Kunze M, Lewandowski B, Peters K, Schmuecker H, Steinke M, Andress JC, Barlow NR, Bhimji W, Chevalier N, Clark PJ, Cottingham WN, De Groot N, Dyce N, Foster B, Mass A, McFall JD, Wallom D, Wilson FF, Abe K, Hearty C, Mattison TS, McKenna JA, Thiessen D, Camanzi B, Jolly S, McKemey AK, Tinslay J, Blinov VE, Bukin AD, Bukin DA, Buzykaev AR, Dubrovin MS, Golubev VB, Ivanchenko VN, Kolachev GM, Korol AA, Kravchenko EA, Onuchin AP, Salnikov AA, Serednyakov SI, Skovpen YI, Telnov VI, Yushkov AN, Lankford AJ, Mandelkern M, McMahon S, Stoker DP, Ahsan A, Buchanan C, Chun S, MacFarlane DB, Prell S, Rahatlou S, Raven G, Sharma V, Burke S, Campagnari C, Dahmes B, Hale D, Hart PA, Kuznetsova N, Kyre S, Levy SL, Long O, Lu A, Richman JD, Verkerke W, Witherell M, Yellin S, Beringer J, Dorfan DE, Eisner AM, Frey A, Grillo AA, Grothe M, Heusch CA, Johnson RP, Kroeger W, Lockman WS, Pulliam T, Sadrozinski H, Schalk T, Schmitz RE, Schumm BA, Seiden A, Spencer EN, Turri M, Walkowiak W, Williams DC, Chen E, Dubois-Felsmann GP, Dvoretskii A, Hanson JE, Hitlin DG, Metzler S, Oyang J, Porter FC, Ryd A, Samuel A, Weaver M, Yang S, Zhu RY, Devmal S, Geld TL, Jayatilleke S, Jayatilleke SM, Mancinelli G, Meadows BT, Sokoloff MD, Bloom P, Fahey S, Ford WT, Gaede F, van Hoek WC, Johnson DR, Michael AK, Nauenberg U, Olivas A, Park H, Rankin P, Roy J, Sen S, Smith JG, Wagner DL, Blouw J, Harton JL, Krishnamurthy M, Soffer A, Toki WH, Warner DW, Wilson RJ, Zhang J, Brandt T, Brose J, Colberg T, Dahlinger G, Dickopp M, Dubitzky RS, Eckstein P, Futterschneider H, Krause R, Maly E, Müller-Pfefferkorn R, Otto S, Schubert KR, Schwierz R, Spaan B, Wilden L, Behr L, Bernard D, Bonneaud GR, Brochard F, Cohen-Tanugi J, Ferrag S, Fouque G, Gastaldi F, Matricon P, Mora de Freitas P, Renard C, Roussot E, T'Jampens S, Thiebaux C, Vasileiadis G, Verderi M, Anjomshoaa A, Bernet R, Di Lodovico F, Khan A, Muheim F, Playfer S, Swain JE, Falbo M, Bozzi C, Dittongo S, Folegani M, Piemontese L, Treadwell E, Anulli F, Baldini-Ferroli R, Calcaterra A, de Sangro R, Falciai D, Finocchiaro G, Patteri P, Peruzzi IM, Piccolo M, Xie Y, Zallo A, Bagnasco S, Buzzo A, Contri R, Crosetti G, Lo Vetere M, Macri M, Monge MR, Pallavicini M, Passaggio S, Pastore FC, Patrignani C, Pia MG, Robutti E, Santroni A, Morii M, Bartoldus R, Dignan T, Hamilton R, Mallik U, Cochran J, Crawley HB, Fischer PA, Lamsa J, McKay R, Meyer WT, Rosenberg EI, Albert JN, Beigbeder C, Benkebil M, Breton D, Cizeron R, Du S, Grosdidier G, Hast C, Höcker A, LePeltier V, Lutz AM, Plaszczynski S, Schune MH, Trincaz-Duvoid S, Truong K, Valassi A, Wormser G, Bionta RM, Brigljević V, Brooks A, Fackler O, Fujino D, Lange DJ, Mugge M, O'Connor TG, Pedrotti B, Shi X, van Bibber K, Wenaus TJ, Wright DM, Wuest CR, Yamamoto B, Carroll M, Fry JR, Gabathuler E, Gamet R, George M, Kay M, Payne DJ, Sloane RJ, Touramanis C, Aspinwall ML, Bowerman DA, Dauncey PD, Egede U, Eschrich I, Gunawardane NJ, Martin R, Nash JA, Price DR, Sanders P, Smith D, Azzopardi DE, Back JJ, Dixon P, Harrison PF, Newman-Coburn D, Potter RJ, Shorthouse HW, Strother P, Vidal PB, Williams MI, Cowan G, George S, Green MG, Kurup A, Marker CE, McGrath P, McMahon TR, Salvatore F, Scott I, Vaitsas G, Brown D, Davis CL, Ford K, Li Y, Pavlovich J, Allison J, Barlow RJ, Boyd JT, Fullwood J, Jackson F, Lafferty GD, Savvas N, Simopoulos ET, Thompson RJ, Weatherall JH, Bard R, Farbin A, Jawahery A, Lillard V, Olsen J, Roberts DA, Schieck JR, Blaylock G, Dallapiccola C, Flood KT, Hertzbach SS, Kofler R, Lin CS, Staengle H, Willocq S, Wittlin J, Brau B, Cowan R, Sciolla G, Taylor F, Yamamoto RK, Britton DI, Milek M, Patel PM, Trischuk J, Lanni F, Palombo F, Bauer JM, Booke M, Cremaldi L, Eschenberg V, Kroeger R, Reep M, Reidy J, Sanders DA, Summers DJ, Beaulieu M, Martin JP, Nief JY, Seitz R, Taras P, Zacek V, Nicholson H, Sutton CS, Cavallo N, Cartaro C, De Nardo G, Fabozzi F, Gatto C, Lista L, Paolucci P, Piccolo D, Sciacca C, LoSecco JM, Alsmiller JR, Gabriel TA, Handler T, Heck J, Brau JE, Frey R, Iwasaki M, Sinev NB, Strom D, Borsato E, Colecchia F, Dal Corso F, Galeazzi F, Margoni M, Marzolla M, Michelon G, Morandin M, Posocco M, Rotondo M, Simonetto F, Stroili R, Torassa E, Voci C, Bailly P, Benayoun M, Briand H, Chauveau J, David P, De La Vaissière C, Del Buono L, Genat JF, Hamon O, Le Diberder F, Lebbolo H, Leruste P, Lory J, Martin L, Roos L, Stark J, Versillé S, Zhang B, Manfredi PF, Ratti L, Re V, Speziali V, Frank ED, Gladney L, Guo QH, Panetta JH, Angelini C, Batignani G, Bettarini S, Bondioli M, Bosi F, Carpinelli M, Forti F, Giorgi MA, Lusiani A, Martinez-Vidal F, Morganti M, Neri N, Paoloni E, Rama M, Rizzo G, Sandrelli F, Simi G, Triggiani G, Walsh J, Hairre M, Judd D, Paick K, Turnbull L, Wagoner DE, Albert J, Bula C, Fernholz R, Lu C, McDonald KT, Miftakov V, Sands B, Schaffner SF, Smith AJ, Tumanov A, Varnes EW, Bronzini F, Buccheri A, Bulfon C, Cavoto G, del Re D, Faccini R, Ferrarotto F, Ferroni F, Fratini K, Lamanna E, Leonardi E, Mazzoni MA, Morganti S, Piredda G, Safai Tehrani F, Serra M, Voena C, Waldi R, Jacques PF, Kalelkar M, Plano RJ, Adye T, Claxton B, Franek B, Galagedera S, Geddes NI, Gopal GP, Lidbury J, Xella SM, Aleksan R, Besson P, Bourgeois P, De Domenico G, Emery S, Gaidot A, Ganzhur SF, Gosset L, Hamel de Monchenault G, Kozanecki W, Langer M, London GW, Mayer B, Serfass B, Vasseur G, Yeche C, Zito M, Copty N, Purohit MV, Singh H, Yumiceva FX, Adam I, Anthony PL, Aston D, Baird K, Bartelt J, Becla J, Bell R, Bloom E, Boeheim CT, Boyarski AM, Boyce RF, Bulos F, Burgess W, Byers B, Calderini G, Claus R, Convery MR, Coombes R, Cottrell L, Coupal DP, Coward DH, Craddock WW, DeStaebler H, Dorfan J, Doser M, Dunwoodie W, Ecklund S, Fieguth TH, Field RC, Freytag DR, Glanzman T, Godfrey GL, Grosso P, Haller G, Hanushevsky A, Harris J, Hasan A, Hewett JL, Himel T, Huffer ME, Innes WR, Jessop CP, Kawahara H, Keller L, Kelsey MH, Kim P, Klaisner LA, Kocian ML, Krebs HJ, Kunz PF, Langenegger U, Langeveld W, Leith DW, Louie SK, Luitz S, Luth V, Lynch HL, MacDonald J, Manzin G, Mariske H, McCulloch M, McShurley D, Menke S, Messner R, Metcalfe S, Moffeit KC, Mount R, Muller DR, Nelson D, Nordby M, O'Grady CP, O'Neill FG, Oxoby G, Pavel T, Perl J, Petrak S, Putallaz G, Quinn H, Raines PE, Ratcliff BN, Reif R, Robertson SH, Rochester LS, Roodman A, Russell JJ, Sapozhnikov L, Saxton OH, Schietinger T, Schindler RH, Schwiening J, Seeman JT, Serbo VV, Skarpass K, Snyder A, Soha A, Spanier SM, Stahl A, Stelzer J, Su D, Sullivan MK, Talby M, Tanaka HA, Va'vra J, Wagner SR, Weinstein AJ, White JL, Wienands U, Wisniewski WJ, Young CC, Zioulas G, Burchat PR, Cheng CH, Kirkby D, Meyer TI, Roat C, De Silva A, Henderson R, Berridge S, Bugg W, Cohn H, Hart E, Weidemann AW, Benninger T, Izen JM, Kitayama I, Lou XC, Turcotte M, Bianchi F, Bona M, Di Girolamo B, Gamba D, Smol A, Zanin D, Bosisio L, Della Ricca G, Lanceri L, Pompili A, Poropat P, Vuagnin G, Panvini RS, Brown CM, Kowalewski R, Roney JM, Band HR, Charles E, Dasu S, Elmer P, Hu H, Johnson JR, Nielsen J, Orejudos W, Pan Y, Prepost R, Scott IJ, von Wimmersperg-Toeller JH, Wu SL, Yu Z, Zobernig H, Kordich TM, Moore TB, Neal H. Measurement of CP-violating asymmetries in B0 decays to CP eigenstates. Phys Rev Lett 2001; 86:2515-2522. [PMID: 11289970 DOI: 10.1103/physrevlett.86.2515] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2001] [Indexed: 05/23/2023]
Abstract
We present measurements of time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates. The measurement uses a data sample of 23x10(6) Upsilon(4S)-->BbarB decays collected by the BABAR detector at the PEP-II asymmetric B Factory at SLAC. In this sample, we find events in which one neutral B meson is fully reconstructed in a CP eigenstate containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the standard model is proportional to sin2beta, is derived from the decay time distributions in such events. The result is sin2beta = 0.34+/-0.20 (stat)+/-0.05 (syst).
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Affiliation(s)
- B Aubert
- Laboratoire de Physique des Particules, Annecy-le-Vieux, France
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Abstract
Cadherins not only maintain the structural integrity of cells and tissues but also control a wide array of cellular behaviours. They are instrumental for cell and tissue polarization, and they regulate cell movements such as cell sorting, cell migration and cell rearrangements. Cadherins may also contribute to neurite outgrowth and pathfinding, and to synaptic specificity and modulation in the central nervous system.
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Affiliation(s)
- U Tepass
- Department of Zoology, University of Toronto, 25 Harbord Street, Toronto, Ontario M5S 3G5, Canada.
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Truong K, Guilly MN, Gerbault-Seureau M, Malfoy B, Vielh P, Dutrillaux B. Evidence for in vitro selection during cell culturing of breast cancer: detection by flow and image cytometry. Cancer Genet Cytogenet 1999; 114:154-5. [PMID: 10549274 DOI: 10.1016/s0165-4608(99)00052-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Detailed studies of chromosome rearrangements within solid tumors require karyotype analysis after cell culturing. However, different cell subpopulations with various growth capacities within one tumor may introduce biases in karyotype analysis, known as the in vitro selection. In our laboratory, 22% of karyotypes from breast cancers established after short-term culture were normal. Using interphase fluorescence in situ hybridization (FISH) for the determination of chromosome 1 arm imbalances and flow cytometry measurements of ploidy, we demonstrated that at least 2/3 of these tumors were mainly composed of aneuploid cell populations. Thus, the incidence of normal or balanced karyotypes among breast cancers is probably below 7%. This is the first direct proof for the existence of an in vitro selection within breast cancer cultures, suggesting cautious interpretation of cytogenetic data.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Aneuploidy
- Artifacts
- Breast Neoplasms/genetics
- Breast Neoplasms/pathology
- Carcinoma, Ductal, Breast/genetics
- Carcinoma, Ductal, Breast/pathology
- Carcinoma, Intraductal, Noninfiltrating/genetics
- Carcinoma, Intraductal, Noninfiltrating/pathology
- Chromosomes, Human, Pair 1/genetics
- Female
- Flow Cytometry
- Humans
- In Situ Hybridization, Fluorescence
- Karyotyping
- Middle Aged
- Ploidies
- Selection, Genetic
- Time Factors
- Tumor Cells, Cultured
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Truong K, Guilly MN, Gerbault-Seureau M, Malfoy B, Vielh P, Bourgeois CA, Dutrillaux B. Quantitative FISH by image cytometry for the detection of chromosome 1 imbalances in breast cancer: a novel approach analyzing chromosome rearrangements within interphase nuclei. J Transl Med 1998; 78:1607-13. [PMID: 9881960] [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: 02/09/2023] Open
Abstract
Interphase cytogenetics have become a widespread tool for investigation of chromosome rearrangements in solid tumors. The most recurrent chromosome alteration within breast cancer affects chromosome 1, leading principally to gain of the long arm and/or loss of the short arm. We have developed a new method for detection of chromosome 1 arm imbalances in interphase nuclei. The method is based on quantitation of the fluorescence signals emitted by the hybridized two-color paintings of the short and long arms using image cytometry. The chromosome arm imbalance was determined by calculating the ratio of both fluorescence emissions of each arm. The ratio of the paintings of normal lymphocytes was used as a reference. Three breast cancer cell lines, 13 fresh tumor samples, and 6 fine-needle samplings of breast cancer were analyzed using an automated image cytometer. Whenever possible, classic cytogenetics and in situ hybridization on metaphases were performed as controls. Fluorescence ratios representing the imbalances of chromosome 1 arms with values between 1 and 3.2 were measured. Data between classic cytogenetics and interphase cytogenetics were well-correlated (r = 0.89). This method, which enables an easy detection of intrachromosomal imbalances without need of metaphase preparations, detects malignant cells and can be extended to other carcinomas for which chromosome 1 arm imbalances are recurrent or chromosome alterations specific of other malignancies. In comparison to other interphase fluorescence in situ hybridization techniques, it avoids every spot scoring problem encountered when using centromeric probes and the difficulties in interpreting structural rearrangements.
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Affiliation(s)
- K Truong
- Cytogénétique Moléculaire et Oncologie, Unité mixte de Recherche 147 Centre National de Recherche Scientifique-Institut Curie, Paris, France
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Truong K, Vielh P, Malfoy B, Klijanienko J, Dutrillaux B, Bourgeois CA. Fluorescence-based analysis of DNA ploidy and cell proliferation within fine-needle samplings of breast tumors: a new approach using automated image cytometry. Cancer 1998; 84:309-16. [PMID: 9801206] [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: 02/09/2023]
Abstract
BACKGROUND Automated image cytometry can allow concurrent quantification of several parameters in each individual cell within a population, opening new possibilities for diagnosis and prognosis. In this study, the authors investigated the capacity of this method for performing a bivariate analysis of DNA ploidy and synthesis in fine-needle samplings obtained without aspiration from breast tumors. METHODS Samplings from 25 unselected cases of ductal infiltrative breast adenocarcinoma and 2 cases of fibroadenoma were analyzed. For each case, 3-5 slides (containing approximately 1000 cells each) were quantified to assess experimental precision. Ploidy was determined by fluorescent staining of DNA using 4,6-diamidino-2-phenylindole (DAPI). Contaminating lymphocytes were taken as internal controls to calculate DNA indices. DNA synthesis was analyzed by immunofluorescent detection of 5-bromodeoxyuridine (BrdU) incorporation. Measurements were compared with flow cytometric data obtained from the same patients. RESULTS Relative error in determination of DNA indices was generally below 5%. Determination of proliferation indices were more variable, with a mean relative error of 25%. Two different populations of BrdU positive cells were detected systematically, one in the diploid and another in the aneuploid fraction. For both cytometric methods, DNA indices were similar in all 27 cases, whereas BrdU labeling indices showed no significant correlation in 13 cases. The remaining cases were not comparable due to lack of flow cytometric data. Labeling indices obtained by image cytometry did not reveal any significant correlation with Scarff-Bloom-Richardson grading or clinical staging. CONCLUSIONS Automated image cytometry allows concurrent measurement of ploidy and cell proliferation within individual breast carcinoma cells. Statistical reliability can be reached with a relative small number of cells (1000), which is crucial for samples in which the cell number is too low for flow cytometry analysis. Visual control for artifact elimination and better characterization of cell populations makes this a powerful tool for tumor cell investigation. Automated image cytometry allows the obtainment of valuable prognostic parameters of traditional flow cytometry with the relatively small number of cells obtained in aspiration procedures.
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Affiliation(s)
- K Truong
- Cytogénétique moléculaire et Oncologie, Institut Curie, Paris, France
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Abstract
We report that processing at a cloned bacteriophage T7 RNase III site results in strong stabilization of the mRNA relative to the full-length transcript. In contrast, processing by RNase III of the bacteriophage lambda int transcript leads to rapid degradation of the messenger. It is proposed that the mode of cleavage within the RNase III site determines mRNA stability. Single cleavage leaves part of the phage T7 RNase III site in a folded structure at the generated 3' end and stabilizes the upstream mRNA whereas double cleavage at the lambda int site removes the folded structure and accelerates degradation. In addition, the processed transcript is as active a messenger as the unprocessed one and can direct protein synthesis for longer times. This increased efficiency is accompanied by a proportional (3-4 fold) increase in protein levels. In contrast, processing at the lambda int site reduces Int synthesis. Thus, processing may either stabilize mRNA and stimulate gene expression or destabilize a messenger and prevent protein synthesis. The end result appears to be determined by the mode of cleavage within the RNase III site.
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Abstract
Blunt-end ligation of a "filled-in" HindIII, Sal I, Ava I or Bcl I restriction site with a DNA fragment having A, G, C, or T as the terminal 3' nucleotide regenerates the corresponding restriction site. A combination of this property with the action of BAL 31 nuclease which progressively removes base-pairs from the ends of linear DNA, can generate deletions extending to desired pre-selected nucleotides, and introduces unique restriction sites at those positions. Similarly other restriction sites can be used to select for the deletion of sequences between specific di-, tri-, tetra- and penta-nucleotides. Using this method, 10 base pairs were deleted from the end of a restriction fragment carrying the late promoter for bacteriophage T7 gene 1.1, to create a molecule with a unique restriction site at the initiation codon for translation.
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Coudert J, Truong K, Ambroise-Thomas P, Douchet C. [Comparative antigenic study of several pathogenic yeasts of the genus Candida by immunofluorescence, agglutination and immunoelectrophoresis]. Ann Inst Pasteur (Paris) 1968; 114:287-96. [PMID: 4873643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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