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Shiau C, Cao J, Gregory M, Kim Y, He S, Reeves J, Wang S, Lester NA, Su J, Wang PL, Beechem J, Hong TS, Wo JY, Ting D, Hemberg M, Hwang WL. Intercellular Mechanisms of Therapeutic Resistance at the Tumor-Stromal Interface Using Ultra High-Plex Single-Cell Spatial Transcriptomics and Genetically-Engineered Tumoroids. Int J Radiat Oncol Biol Phys 2023; 117:S101-S102. [PMID: 37784270 DOI: 10.1016/j.ijrobp.2023.06.056] [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: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) There is a major gap in knowledge regarding how intercellular interactions in the tumor microenvironment (TME) mediate therapeutic resistance. Achievement of this goal has been limited by a lack of (1) spatial context in dissociated single-cell methods; (2) single-cell resolution in spatial profiling approaches; (3) high quality data and yield with FFPE patient specimens; and (4) computational methods for ligand-receptor analyses that consider both gene expression and spatial coordinates. MATERIALS/METHODS We developed an innovative spatial biology paradigm that combines cutting-edge experimental and computational methods to enable high-resolution, spatially-guided discovery of critical mediators of therapeutic resistance. We applied this approach to dissect the single-cell spatial transcriptomic landscape of untreated vs. chemoradiotherapy-treated primary human pancreatic ductal adenocarcinoma (PDAC; n = 21) using ultra-high plex spatial molecular imaging (SMI) optimized for high-sensitivity, subcellular detection of up to 6000 gene transcripts in FFPE sections-an order of magnitude greater than contemporary methods. RESULTS We recovered over 1,000,000 high-quality single cells in situ representing more than 20 distinct cell types, including epithelial, immune, endothelial, endocrine, and diverse stromal cells. We developed an optimal transport-based computational method to infer cell-cell communication at the cancer-stromal interface. Treatment with chemoradiotherapy was associated with the largest increase in fibroblast-malignant interactions. Comparing the SMI data with orthogonal single-nucleus RNA-sequencing and digital spatial profiling data, we identified CLCF1-CNTFR as the fibroblast-malignant interaction most associated with resistance to chemoradiotherapy in PDAC. CLCF1 is a gp130-family cytokine that activates Jak-STAT signaling and acts as a potent neurotrophic factor. Notably, the CLCF1-CNTRF (fibroblast-malignant) interaction has prominent pro-oncogenic effects in lung adenocarcinoma and an engineered CNTFR decoy receptor with therapeutic potential has been developed. To functionally validate the role of the CLCF1-CNTFR (fibroblast-malignant) interaction in mediating resistance to cytotoxic therapy, we created CRISPR-engineered cancer-fibroblast tumoroids and modulated expression of this ligand-receptor pair. Pancreatic cancer cell viability in the presence of 5-fluorouracil was better maintained with increased CLCF1-CNTFR signaling. CONCLUSION In this study, we integrated ultra high-plex single-cell spatial transcriptomics, optimal transport ligand-receptor predictions, and genetically-engineered stromal tumoroids to identify and validate CLCF1-CNTFR as an important intercellular mechanism of resistance to chemoradiotherapy in PDAC-pioneering a paradigm for translating single-cell spatial biology to clinical oncology.
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Affiliation(s)
- C Shiau
- Massachusetts General Hospital, Boston, MA
| | - J Cao
- Brigham and Women's Hospital, Boston, MA
| | - M Gregory
- Nanostring Technologies, Seattle, WA
| | - Y Kim
- Nanostring Technologies, Seattle, WA
| | - S He
- Nanostring Technologies, Seattle, WA
| | - J Reeves
- Nanostring Technologies, Seattle, WA
| | - S Wang
- Columbia University, New York, NY
| | - N A Lester
- Massaschusetts General Hospital, Boston, MA
| | - J Su
- Massachusetts General Hospital, BOSTON, MA
| | - P L Wang
- Massaschusetts General Hospital, Boston, MA
| | - J Beechem
- Nanostring Technologies, Seattle, WA
| | - T S Hong
- Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - J Y Wo
- Newton-Wellesley Hospital, Newton, MA
| | - D Ting
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA
| | - M Hemberg
- Brigham and Women's Hospital, Boston, MA
| | - W L Hwang
- Broad Institute of MIT and Harvard, Cambridge, MA
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Sportelli L, Eisenberg DP, Passiatore R, D'Ambrosio E, Antonucci LA, Chen Q, Czarapata J, Goldman AL, Gregory M, Griffiths K, Hyde TM, Kleinman JE, Pardiñas AF, Parihar M, Popolizio T, Rampino A, Shin JH, Veronese M, Ulrich WS, Zink CF, Bertolino A, Howes OD, Berman KF, Weinberger DR, Pergola G. Dopamine and schizophrenia from bench to bedside: Discovery of a striatal co-expression risk gene set that predicts in vivo measures of striatal function. bioRxiv 2023:2023.09.20.558594. [PMID: 37786720 PMCID: PMC10541621 DOI: 10.1101/2023.09.20.558594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
Schizophrenia (SCZ) is characterized by a polygenic risk architecture implicating diverse molecular pathways important for synaptic function. However, how polygenic risk funnels through these pathways to translate into syndromic illness is unanswered. To evaluate biologically meaningful pathways of risk, we used tensor decomposition to characterize gene co-expression in post-mortem brain (of neurotypicals: N=154; patients with SCZ: N=84; and GTEX samples N=120) from caudate nucleus (CN), hippocampus (HP), and dorsolateral prefrontal cortex (DLPFC). We identified a CN-predominant gene set showing dopaminergic selectivity that was enriched for genes associated with clinical state and for genes associated with SCZ risk. Parsing polygenic risk score for SCZ based on this specific gene set (parsed-PRS), we found that greater pathway-specific SCZ risk predicted greater in vivo striatal dopamine synthesis capacity measured by [ 18 F]-FDOPA PET in three independent cohorts of neurotypicals and patients (total N=235) and greater fMRI striatal activation during reward anticipation in two additional independent neurotypical cohorts (total N=141). These results reveal a 'bench to bedside' translation of dopamine-linked genetic risk variation in driving in vivo striatal neurochemical and hemodynamic phenotypes that have long been implicated in the pathophysiology of SCZ.
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Hegarty CE, Ianni AM, Kohn PD, Kolachana B, Gregory M, Masdeu JC, Eisenberg DP, Berman KF. Polymorphism in the ZNF804A Gene and Variation in D 1 and D 2/D 3 Dopamine Receptor Availability in the Healthy Human Brain: A Dual Positron Emission Tomography Study. Biol Psychiatry Cogn Neurosci Neuroimaging 2023; 8:121-128. [PMID: 33712377 PMCID: PMC10501410 DOI: 10.1016/j.bpsc.2020.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 12/03/2020] [Accepted: 12/15/2020] [Indexed: 01/11/2023]
Abstract
BACKGROUND The rs1344706 single nucleotide polymorphism in the ZNF804A gene has been associated with risk for psychosis in multiple genome-wide association studies, yet mechanisms underlying this association are not known. Given preclinical work suggesting an impact of ZNF804A on dopamine receptor gene transcription and clinical studies establishing dopaminergic dysfunction in patients with schizophrenia, we hypothesized that the ZNF804A risk single nucleotide polymorphism would be associated with variation in dopamine receptor availability in the human brain. METHODS In this study, 72 healthy individuals genotyped for rs1344706 completed both [18F]fallypride and [11C]NNC-112 positron emission tomography scans to measure D2/D3 and D1 receptor availability, respectively. Genetic effects on estimates of binding potential for each ligand were tested first with canonical subject-specific striatal regions of interest analyses, followed by exploratory whole-brain voxelwise analyses to test for more localized striatal signals and for extrastriatal effects. RESULTS Region of interest analyses revealed significantly less D2/D3 receptor availability in risk-allele homozygotes (TT) compared with non-risk allele carriers (G-allele carrier group: TG and GG) in the associative striatum and sensorimotor striatum, but no significant differences in striatal D1 receptor availability. CONCLUSIONS These data suggest that ZNF804A genotype may be meaningfully linked to dopaminergic function in the human brain. The results also may provide information to guide future studies of ZNF804A-related mechanisms of schizophrenia risk.
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Affiliation(s)
- Catherine E Hegarty
- Clinical and Translational Neuroscience Branch, Intramural Research Program, National Institute of Mental Health, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland; Neuroscience Graduate Program, Brown University, Providence, Rhode Island
| | - Angela M Ianni
- Clinical and Translational Neuroscience Branch, Intramural Research Program, National Institute of Mental Health, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland
| | - Philip D Kohn
- Clinical and Translational Neuroscience Branch, Intramural Research Program, National Institute of Mental Health, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland
| | - Bhaskar Kolachana
- Human Brain Collection Core, Intramural Research Program, National Institute of Mental Health, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland
| | - Michael Gregory
- Clinical and Translational Neuroscience Branch, Intramural Research Program, National Institute of Mental Health, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland
| | - Joseph C Masdeu
- Clinical and Translational Neuroscience Branch, Intramural Research Program, National Institute of Mental Health, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland
| | - Daniel P Eisenberg
- Clinical and Translational Neuroscience Branch, Intramural Research Program, National Institute of Mental Health, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland
| | - Karen F Berman
- Clinical and Translational Neuroscience Branch, Intramural Research Program, National Institute of Mental Health, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland.
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Liu Y, Denisov I, Gregory M, Sligar SG, Kincaid JR. Importance of Asparagine 202 in Manipulating Active Site Structure and Substrate Preference for Human CYP17A1. Biochemistry 2022; 61:583-594. [PMID: 35287432 PMCID: PMC9972851 DOI: 10.1021/acs.biochem.2c00023] [Citation(s) in RCA: 2] [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] [Indexed: 01/28/2023]
Abstract
The multifunctional cytochrome P450 17A1 (CYP17A1) plays a crucial role in human steroid hormone synthesis (UniProtKB─P05093). It first carries out standard monooxygenase chemistry, converting pregnenolone (PREG) and progesterone (PROG) into 17OH-PREG and 17OH-PROG, utilizing a "Compound I" to initiate hydrogen abstraction and radical recombination in the classic "oxygen rebound" mechanism. Additionally, these hydroxylated products also serve as substrates in a second oxidative cycle which cleaves the 17-20 carbon-carbon bond to form dehydroepiandrosterone and androstenedione, which are key precursors in the generation of powerful androgens and estrogens. Interestingly, in humans, with 17OH-PREG, this so-called lyase reaction is more efficient than with 17OH-PROG, based on Kcat/Km values. In the present work, the asparagine residue at 202 position was replaced by serine, an alteration which can affect substrate orientation and control substrate preference for the lyase reaction. First, we report studies of solvent isotope effects for the N202S CYP17A1 mutant in the presence of 17OH-PREG and 17OH-PROG, which suggest that the ferric peroxo species is the predominant catalytically active intermediate in the lyase step. This conclusion is further supported by employing a combination of cryoradiolysis and resonance Raman techniques to successfully trap and structurally characterize the key reaction intermediates, including the peroxo, the hydroperoxo, and the crucial peroxo-hemiketal intermediate. Collectively, these studies show that the mutation causes active site structural changes that alter the H-bonding interactions with the key Fe-O-O fragment and the degree of protonation of the reactive ferric peroxo intermediate, thereby impacting lyase efficiency.
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Affiliation(s)
- Yilin Liu
- Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53233, United States
| | - Ilia Denisov
- Departments of Chemistry and Biochemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Michael Gregory
- Departments of Chemistry and Biochemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Stephen G Sligar
- Departments of Chemistry and Biochemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - James R Kincaid
- Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53233, United States
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Lindqvist A, Hacking D, Wright L, Cowie B, D'Orsa K, Gregory M, Foulkes S, Janssens K, La Gerche A. Swimming Induced Pulmonary Oedema is Not Cardiogenic in Long-Distance Open-Water Swimmers. Heart Lung Circ 2022. [DOI: 10.1016/j.hlc.2022.06.291] [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: 10/16/2022]
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Graham A, Korecky J, Schultz E, Gregory M, Asosingh K. Considerations for user consultation in a flow cytometry shared resource laboratory. Cytometry A 2021; 101:228-236. [PMID: 34787950 DOI: 10.1002/cyto.a.24519] [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: 08/08/2021] [Revised: 11/12/2021] [Accepted: 11/15/2021] [Indexed: 11/06/2022]
Abstract
User consultation is an essential first step in assuring high-quality flow cytometric data. A central challenge to shared resource laboratory (SRL) staff is how to best guide new and current users to meet each projects' needs. One solution to this challenge is to follow a standard user consultation platform addressing all critical steps between the conception of the experiment and the actual acquisition of samples. Here we describe considerations to help an SRL understand the researcher's goals and how best the SRL staff can provide expert advice in a structured manner. User consultation has an educational nature, informing users about current best practices in cytometry that apply to their specific utilization. A consultation report also improves communication between the SRL, principal investigator, and lab members of the collaborating researcher. Development of best SRL practices is spearheaded by the ISAC SRL committee and this communication sets the foundation to initiate such report for user consultation. Implementation of best practices during user consultation will improve rigor and reproducibility in cytometry.
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Affiliation(s)
- Amy Graham
- Flow Cytometry Core Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Jena Korecky
- Flow Cytometry Core Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Eric Schultz
- Flow Cytometry Core Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Michael Gregory
- Florida Research and Innovation Center, Cleveland Clinic, Port St Lucie, Florida, USA
| | - Kewal Asosingh
- Flow Cytometry Core Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA.,Department of Inflammation and Immunity, Cleveland Clinic, Cleveland, Ohio, USA
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Maude RJ, Ngo TD, Tran DT, Nguyen BTH, Dang DV, Tran LK, Gregory M, Maude RR, Sinha I, Pongsoipetch K, Martin NJ. Risk factors for malaria in high incidence areas of Viet Nam: a case-control study. Malar J 2021; 20:373. [PMID: 34535140 PMCID: PMC8446736 DOI: 10.1186/s12936-021-03908-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 09/07/2021] [Indexed: 12/05/2022] Open
Abstract
Background A key step to advancing the goal of malaria elimination in Viet Nam by 2030 is focusing limited resources for treatment and prevention to groups most at risk for malaria transmission. Methods To better understand risk factors for malaria transmission in central Viet Nam, a survey of 1000 malaria positive cases and 1000 malaria negative controls was conducted. Cases and controls were matched for age and gender and self-presented at commune health stations (CHS) in Binh Phuoc, Dak Nong and Dak Lak Provinces. Diagnoses were confirmed with microscopy, rapid diagnostic test and PCR. Participants were interviewed about 50 potential risk factors for malaria, which included information about occupation, forest visitation, travel, healthcare-seeking behaviour and prior use of anti-malaria interventions. Participants were enrolled by trained government health workers and the samples were analysed in Vietnamese government laboratories. Data were analysed by univariable, block-wise and multivariable logistic regression. Results Among cases, 61.8% had Plasmodium falciparum, 35.2% Plasmodium vivax and 3% mixed species infections. Median (IQR) age was 27 (21–36) years and 91.2% were male. Twenty-five risk factors were associated with being a case and eleven with being a control. Multivariable analysis found that malaria cases correlated with forest workers, recent forest visitation, longer duration of illness, having a recorded fever, number of malaria infections in the past year, having had prior malaria treatment and having previously visited a clinic. Conclusions This study demonstrates the benefits of increased statistical power from matched controls in malaria surveillance studies, which allows identification of additional independent risk factors. It also illustrates an example of research partnership between academia and government to collect high quality data relevant to planning malaria elimination activities. Modifiable risk factors and implications of the findings for malaria elimination strategy are presented. Supplementary Information The online version contains supplementary material available at 10.1186/s12936-021-03908-7.
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Affiliation(s)
- Richard J Maude
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand. .,Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, OX3 7FZ, UK. .,Harvard TH Chan School of Public Health, Harvard University, Boston, USA. .,The Open University, Milton Keynes, UK.
| | - Thang Duc Ngo
- National Institute of Malariology, Parasitology and Entomology (NIMPE), Hanoi, Vietnam
| | - Duong Thanh Tran
- National Institute of Malariology, Parasitology and Entomology (NIMPE), Hanoi, Vietnam
| | - Binh Thi Huong Nguyen
- National Institute of Malariology, Parasitology and Entomology (NIMPE), Hanoi, Vietnam
| | - Dung Viet Dang
- National Institute of Malariology, Parasitology and Entomology (NIMPE), Hanoi, Vietnam
| | | | | | - Rapeephan R Maude
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand
| | - Ipsita Sinha
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand.,Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, OX3 7FZ, UK
| | - Kulchada Pongsoipetch
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand
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Grin-Yatsenko V, Ponomarev V, Kara O, Wandernoth B, Gregory M, Ilyukhina V, Kropotov J, Schneider H. P 57. Effect of Infra-Low Frequency Neurofeedback on Infra-Slow EEG Fluctuations. Clin Neurophysiol 2021. [DOI: 10.1016/j.clinph.2021.02.373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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YADAV N, Gregory M. POS-216 MECHANISM OF ACUTE HYEPERCALCEMIA FOLLOWING MASSIVE TRANSFUSION DURING ORGAN TRANSPLANT. Kidney Int Rep 2021. [DOI: 10.1016/j.ekir.2021.03.229] [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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10
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Suratwala T, Menapace J, Tham G, Steele R, Wong L, Ray N, Bauman B, Gregory M, Hordin T. Effect of workpiece curvature on the tool influence function during hemispherical sub-aperture tool glass polishing. Appl Opt 2021; 60:1041-1050. [PMID: 33690410 DOI: 10.1364/ao.415376] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 12/20/2020] [Indexed: 06/12/2023]
Abstract
The influence of workpiece curvature on the tool influence function spot during polishing of fused silica glass with cerium oxide slurry, while using a rotating hemispherical pad-foam tool for a wide variety of process conditions (tool displacement, inclination angle, and rotation rate), has been investigated. (Workpiece curvature ranged from 500 mm radius concave to 43 mm radius convex.) The TIF spot decreases in diameter and increases in the peak removal rate on more convex workpieces. In contrast, the TIF spot increases both in diameter and peak removal rate on more concave workpieces. For the range of workpiece curvatures investigated, both the spot size and the peak removal rate changed significantly, as much as 2 times. An elastic sphere-sphere contact mechanics model, which utilizes both a modified displacement (that leads to a change in the applied load) as well as a mismatch factor (that influences the pressure distribution shape), has been developed. The model was validated using both offline load-displacement measurements and finite-element analysis simulations. The model quantitatively describes the measured change in the relative contact diameter and relative pressure distribution, as well as semiquantitively describes the change in the relative volumetric removal rate on a large variety of TIF spots. The change in the volumetric removal rate for convex workpieces is a result of the balance between a decreasing spot size (reducing removal) and an increasing peak pressure (increasing removal), which usually results in relatively small changes in volumetric removal. In the case of concave workpieces, the volumetric removal rate change is also governed by a similar balance, but the spot size increase contribution dominates, resulting in a significant increase in volumetric removal rate. Understanding these trends can enable methods to add greater determinism during the fabrication of freeform optics by adjusting polishing parameters (such as dwell time) while the tool translates along a workpiece surface with different local curvatures.
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11
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Suratwala T, Menapace J, Steele R, Wong L, Tham G, Ray N, Bauman B, Gregory M, Hordin T. Mechanisms influencing and prediction of tool influence function spots during hemispherical sub-aperture tool polishing on fused silica. Appl Opt 2021; 60:201-214. [PMID: 33362091 DOI: 10.1364/ao.410903] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 10/30/2020] [Indexed: 06/12/2023]
Abstract
Sub-aperture tool polishing of precision optics requires a detailed understanding of the local material removal [tool influence function (TIF)] at the contact spot between the workpiece and tool to achieve high removal determinism and hence precision of the optic relative to the desired/design surface figure. In this study, the mechanisms influencing and the quantitative prediction of the removal rate and shape of TIF spots during polishing of fused silica glass with cerium oxide slurry using a rotating hemispherical pad-foam tool for a wide variety of process conditions (including tool properties, kinematics, and applied displacements) are investigated. The TIF volumetric removal rate can be estimated utilizing the average relative velocity and contact area using a simple analytical model. In addition, stability of the volumetric removal rate for fixed process conditions is shown to be greatly dependent on the pad preparation and amount of tool use (affecting both pad topography and slurry buildup), whose general behavior shows an increase in removal rate followed by stabilization with polishing time. The determination of the TIF removal shape is more complex. An extended version of the Preston removal model is developed to explain a comprehensive set of measured TIF removal shapes to within ∼22%. This model incorporates a number of phenomena impacting the TIF removal shape including: (a) temporal and spatial dependent relative velocity between the workpiece and tool; (b) an elastic mechanics based, as well as hydrodynamic, pressure distribution; (c) a spatially dependent friction coefficient possibly caused by both reduced slurry replenishment in low velocity regions and pad slurry islands (100 µm scale) and porosity (millimeter scale); and (d) a shear-based removal mechanism on the periphery of the contact spot.
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Davies D, Gregory M, Lannigan J. How Shared Resource Laboratories have risen and adapted to the challenges of a global pandemic. Cytometry A 2020; 99:8-10. [PMID: 33369049 DOI: 10.1002/cyto.a.24283] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 11/30/2020] [Accepted: 12/01/2020] [Indexed: 11/07/2022]
Affiliation(s)
- Derek Davies
- Science Technology Platform Training Lead, The Francis Crick Institute, London, UK
| | - Michael Gregory
- Cytometry and Cell Sorting Lab, NYU Langone Health, New York, New York, USA
| | - Joanne Lannigan
- Flow Cytometry Support Services, LLC, Alexandria, Virginia, USA
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13
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Okereke S, Gregory M. DVT pathway audit. Clin Radiol 2020. [DOI: 10.1016/j.crad.2020.11.055] [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: 11/27/2022]
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Czechowska K, Lannigan J, Wang L, Arcidiacono J, Ashhurst TM, Barnard RM, Bauer S, Bispo C, Bonilla DL, Brinkman RR, Cabanski M, Chang HD, Chakrabarti L, Chojnowski G, Cotleur B, Degheidy H, Dela Cruz GV, Eck S, Elliott J, Errington R, Filby A, Gagnon D, Gardner R, Green C, Gregory M, Groves CJ, Hall C, Hammes F, Hedrick M, Hoffman R, Icha J, Ivaska J, Jenner DC, Jones D, Kerckhof FM, Kukat C, Lanham D, Leavesley S, Lee M, Lin-Gibson S, Litwin V, Liu Y, Molloy J, Moore JS, Müller S, Nedbal J, Niesner R, Nitta N, Ohlsson-Wilhelm B, Paul NE, Perfetto S, Portat Z, Props R, Radtke S, Rayanki R, Rieger A, Rogers S, Rubbens P, Salomon R, Schiemann M, Sharpe J, Sonder SU, Stewart JJ, Sun Y, Ulrich H, Van Isterdael G, Vitaliti A, van Vreden C, Weber M, Zimmermann J, Vacca G, Wallace P, Tárnok A. Cyt-Geist: Current and Future Challenges in Cytometry: Reports of the CYTO 2018 Conference Workshops. Cytometry A 2020; 95:598-644. [PMID: 31207046 DOI: 10.1002/cyto.a.23777] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
| | - Joanne Lannigan
- Flow Cytometry Core, University of Virginia, School of Medicine, 1300 Jefferson Park Ave., Charlottesville, Virginia
| | - Lili Wang
- Biosystems and Biomaterials Division, National Institute of Standards and Technology (NIST), 100 Bureau Drive, Stop 8312, Gaithersburg, Maryland
| | - Judith Arcidiacono
- Office of Tissues and Advanced Therapies, Center for Biologics Evaluation and Research, Food and Drug Administration, 10903 New Hampshire Avenue, Silver Spring, Maryland
| | - Thomas M Ashhurst
- Sydney Cytometry Facility, Discipline of Pathology, and Ramaciotti Facility for Human Systems Biology; Charles Perkins Centre, The University of Sydney and Centenary Institute, New South Wales, Australia
| | - Ruth M Barnard
- GlaxoSmithKline, Gunnels Wood Road, Stevenage, Herts SG1 2NY, UK
| | - Steven Bauer
- Office of Tissues and Advanced Therapies, Center for Biologics Evaluation and Research, Food and Drug Administration, 10903 New Hampshire Avenue, Silver Spring, Maryland
| | - Cláudia Bispo
- UCSF Parnassus Flow Cytometry Core Facility, 513 Parnassus Ave, San Francisco, California
| | - Diana L Bonilla
- Department of Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Ryan R Brinkman
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada.,Terry Fox Laboratory, BC Cancer, Vancouver, Canada
| | - Maciej Cabanski
- Novartis Pharma AG, Fabrikstrasse 10-4.27.02, CH-4056, Basel, Switzerland
| | - Hyun-Dong Chang
- Schwiete-Laboratory Microbiota and Inflammation, German Rheumatism Research Centre Berlin (DRFZ), a Leibniz Institute, Berlin, Germany
| | - Lina Chakrabarti
- Research and Development, MedImmune, an AstraZeneca Company, One Medimmune Way, Gaithersburg, Maryland
| | - Grace Chojnowski
- QIMR Berghofer Medical Research Institute, 300 Herston Road, Herston, Queensland 4006, Australia
| | | | - Heba Degheidy
- Office of Tissues and Advanced Therapies, Center for Biologics Evaluation and Research, Food and Drug Administration, 10903 New Hampshire Avenue, Silver Spring, Maryland
| | - Gelo V Dela Cruz
- Flow Cytometry Platform, Novo Nordisk Center for Stem Cell Biology - Danstem, University of Copenhagen, 3B Blegdamsvej, DK-2200, Copenhagen, Denmark
| | - Steven Eck
- Research and Development, MedImmune, an AstraZeneca Company, One Medimmune Way, Gaithersburg, Maryland
| | - John Elliott
- Biosystems and Biomaterials Division, National Institute of Standards and Technology (NIST), 100 Bureau Drive, Stop 8312, Gaithersburg, Maryland
| | | | - Andy Filby
- Newcastle University, Flow Cytometry Core Facility, Newcastle upon Tyne, Tyne and Wear NE1 7RU, UK
| | | | - Rui Gardner
- Memorial Sloan Kettering Cancer Center, Flow Cytometry Core, New York, New York
| | | | - Michael Gregory
- Division of Advanced Research Technologies, New York University Langone Health, New York, New York
| | - Christopher J Groves
- Research and Development, MedImmune, an AstraZeneca Company, One Medimmune Way, Gaithersburg, Maryland
| | | | - Frederik Hammes
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland
| | | | | | - Jaroslav Icha
- Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Turku, Finland
| | - Johanna Ivaska
- Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Turku, Finland.,Department of Biochemistry, University of Turku, Turku, Finland
| | - Dominic C Jenner
- Defence Science and Technology Laboratory, Chemical Biological and Radiological Division, Porton Down, Salisbury, Wiltshire SP4 0JQ, UK
| | | | - Frederiek-Maarten Kerckhof
- Center for Microbial Ecology and Technology, Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Christian Kukat
- FACS & Imaging Core Facility, Max Planck Institute for Biology of Ageing, Joseph-Stelzmann-Str. 9b, 50931, Köln, Germany
| | | | | | - Michael Lee
- The University California San Francisco, 505 Parnassus Ave, San Francisco, California
| | - Sheng Lin-Gibson
- Biosystems and Biomaterials Division, National Institute of Standards and Technology (NIST), 100 Bureau Drive, Stop 8312, Gaithersburg, Maryland
| | - Virginia Litwin
- Memorial Sloan Kettering Cancer Center, Flow Cytometry Core, New York, New York
| | | | - Jenny Molloy
- Department of Plant Sciences, University of Cambridge, Cambridge, CB2 3EA, UK
| | | | - Susann Müller
- Working Group Flow Cytometry, Department of Environmental Microbiology, Helmholtz Center for Environmental Research (UFZ), Leipzig, Germany
| | - Jakub Nedbal
- Marylou Ingram ISAC Scholar, King's College London, UK
| | - Raluca Niesner
- Marylou Ingram ISAC Scholar, German Rheumatism Research Centre, Berlin, Germany
| | - Nao Nitta
- Department of Chemistry, The University of Tokyo
| | - Betsy Ohlsson-Wilhelm
- SciGro, North Central Office, Foster Plaza 5, Suite 300/PMB 20, 651 Holiday Drive, Pittsburgh, Pennsylvania
| | - Nicole E Paul
- LMA CyTOF Core, Dana-Faber Cancer Institute, 450 Brookline Avenue, Boston, Massachusetts
| | - Stephen Perfetto
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institute of Health (NIH), 40 Convent Drive, Bethesda, Maryland
| | - Ziv Portat
- Weizmann Institute of Science, Life Sciences Core Facilities, Flow Cytometry Unit, Rehovot, 7610001, Israel
| | - Ruben Props
- Center for Microbial Ecology and Technology, Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Stefan Radtke
- Fred Hutchinson Cancer Research Center, 1100 Fairview Ave. N., Seattle, Washington
| | - Radhika Rayanki
- Research and Development, MedImmune, an AstraZeneca Company, One Medimmune Way, Gaithersburg, Maryland
| | - Aja Rieger
- Faculty of Medicine and Dentistry Flow Cytometry Facility, Department of Medical Microbiology & Immunology, University of Alberta, 6-020C Katz Group Centre for Pharmacy and Health Research, Canada
| | - Samson Rogers
- TTP plc, Melbourn Science Park, Melbourn, Hertfordshire SG8 6EE, UK
| | - Peter Rubbens
- KERMIT, Department of Data Analysis and Mathematical Modelling, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Robert Salomon
- Garvan-Weizmann Centre for Cellular Genomics, Garvan Institute of Medical Research, New South Wales, Australia
| | - Matthias Schiemann
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München, Munich, Germany
| | - John Sharpe
- Cytonome/ST LLC, 9 Oak Park Drive, Bedford, Massachusetts
| | | | - Jennifer J Stewart
- Flow Contract Site Laboratory, LLC 18323, Bothell, Everett Highway, Suite 110, Bothell, Washington
| | | | - Henning Ulrich
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | - Gert Van Isterdael
- VIB Flow Core, VIB Center for Inflammation Research, Technologiepark-Zwijnaarde 71, B-9052, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | | | - Caryn van Vreden
- Sydney Cytometry Facility and Ramaciotti Facility for Human Systems Biology, The University of Sydney and Centenary Institute, Camperdown, New South Wales 2050, Australia
| | - Michael Weber
- Department of Cell Biology, Harvard Medical School, Boston, Massachusetts
| | - Jacob Zimmermann
- Mucosal Immunology and Host-Microbial Mutualism laboratories, Department for BioMedical Research, University of Bern, Bern, Switzerland
| | | | - Paul Wallace
- Roswell Park Comprehensive Cancer Center, New York
| | - Attila Tárnok
- Institute for Medical Informatics, Statistics and Epidemiology (IMISE), University of Leipzig, Leipzig, Germany.,Department Therapy Validation, Fraunhofer Institute for Cell Therapy and Immunology IZI, Leipzig, Germany
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15
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Grin-Yatsenko V, Ponomarev V, Kara O, Wandernoth B, Gregory M, Ilyukhina V, Kropotov J. P93 Effect of Infra-Low Frequency Neurofeedback on Infra-Slow EEG Fluctuations. Clin Neurophysiol 2020. [DOI: 10.1016/j.clinph.2019.12.091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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16
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Kempinas WG, Borges CS, Leite GAA, Figueiredo TM, Gregory M, Cyr DG. Prenatal exposure to betamethasone causes intergenerational impairment of epididymal development in the rat. Andrology 2019; 7:719-729. [PMID: 31250541 DOI: 10.1111/andr.12657] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 04/30/2019] [Accepted: 05/05/2019] [Indexed: 02/06/2023]
Abstract
BACKGROUND Studies on epididymal toxicology are scarce. Betamethasone (BM) is a glucocorticoid used in clinical practice for antenatal therapy. We previously reported changes to testicular morphology, altered sperm quality, and fertility in adult rats following intrauterine administration of BM. OBJECTIVES Given that high levels of corticosteroids during gestation lead to fetal androgen depletion, and the essential role of testosterone during epididymal development, here we investigated epididymal morphology and physiology in the F1 and F2 male offspring of female rats treated with BM during gestation. MATERIALS AND METHODS Pregnant rats were randomly divided into two experimental groups: control (saline vehicle, n = 11) and BM-treated group (0.1 mg/kg betamethasone 21-phosphate disodium, n = 13). Rats received an intramuscular injection of vehicle or BM on gestational days 12, 13, 18, and 19. This encompasses the beginning of the critical window of male rat reproductive tract development. A subset of three males from each litter (n = 5 litters/group) was used: One rat per litter was euthanized at puberty, one was euthanized at adulthood, while the others were mated with a non-treated female to obtain the F2 generation. The same protocol described for the F1 was applied for F2, except for the mating protocol. RESULTS In both F1 and F2 generations, prenatal BM exposure resulted in delayed differentiation of the cauda epididymal epithelium, characterized by increased cribriform appearance on PND 45, and displayed weaker or non-detectable Cx43 immunostaining. Furthermore, in the F1 generation only, immunostaining of TP63, a transcription factor expressed in basal cells, appeared more intense with a greater number of TP63-positive cells observed in the cauda epididymis. In adults, the epithelial area was reduced in the F1 BM rats. The contractile activity of isolated epididymal ducts was comparable between groups. DISCUSSION AND CONCLUSION Prenatal BM exposure leads to intergenerational impairment in the development and structure of the rat epididymis.
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Affiliation(s)
- W G Kempinas
- Laboratory of Reproductive and Developmental Biology and Toxicology, Morphology Department, Institute of Biosciences, São Paulo State University (UNESP), Botucatu, Brazil
| | - C S Borges
- Laboratory of Reproductive and Developmental Biology and Toxicology, Morphology Department, Institute of Biosciences, São Paulo State University (UNESP), Botucatu, Brazil
| | - G A A Leite
- Laboratory of Reproductive and Developmental Biology and Toxicology, Morphology Department, Institute of Biosciences, São Paulo State University (UNESP), Botucatu, Brazil
| | - T M Figueiredo
- Laboratory of Reproductive and Developmental Biology and Toxicology, Morphology Department, Institute of Biosciences, São Paulo State University (UNESP), Botucatu, Brazil
| | - M Gregory
- Laboratory for Reproductive Toxicology, INRS-Institut Armand-Frappier, University of Quebec, Laval, QC, Canada
| | - D G Cyr
- Laboratory for Reproductive Toxicology, INRS-Institut Armand-Frappier, University of Quebec, Laval, QC, Canada
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17
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Duplessis C, Gregory M, Frey K, Bell M, Truong L, Schully K, Lawler J, Langley RJ, Kingsmore SF, Woods CW, Rivers EP, Jaehne AK, Quackenbush EB, Fowler VG, Tsalik EL, Clark D. Evaluating the discriminating capacity of cell death (apoptotic) biomarkers in sepsis. J Intensive Care 2018; 6:72. [PMID: 30459950 PMCID: PMC6234551 DOI: 10.1186/s40560-018-0341-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 10/10/2018] [Indexed: 11/10/2022] Open
Abstract
Background Sepsis biomarker panels that provide diagnostic and prognostic discrimination in sepsis patients would be transformative to patient care. We assessed the mortality prediction and diagnostic discriminatory accuracy of two biomarkers reflective of cell death (apoptosis), circulating cell-free DNA (cfDNA), and nucleosomes. Methods The cfDNA and nucleosome levels were assayed in plasma samples acquired in patients admitted from four emergency departments with suspected sepsis. Subjects with non-infectious systemic inflammatory response syndrome (SIRS) served as controls. Samples were acquired at enrollment (T0) and 24 h later (T24). We assessed diagnostic (differentiating SIRS from sepsis) and prognostic (28-day mortality) predictive power. Models incorporating procalcitonin (diagnostic prediction) and APACHE II scores (mortality prediction) were generated. Results Two hundred three subjects were included (107 provided procalcitonin measurements). Four subjects exhibited uncomplicated sepsis, 127 severe sepsis, 35 septic shock, and 24 had non-infectious SIRS. There were 190-survivors and 13 non-survivors. Mortality prediction models using cfDNA, nucleosomes, or APACHEII yielded AUC values of 0.61, 0.75, and 0.81, respectively. A model combining nucleosomes with the APACHE II score improved the AUC to 0.84. Diagnostic models distinguishing sepsis from SIRS using procalcitonin, cfDNA(T0), or nucleosomes(T0) yielded AUC values of 0.64, 0.65, and 0.63, respectively. The three parameter model yielded an AUC of 0.74. Conclusions To our knowledge, this is the first head-to-head comparison of cfDNA and nucleosomes in diagnosing sepsis and predicting sepsis-related mortality. Both cfDNA and nucleosome concentrations demonstrated a modest ability to distinguish sepsis survivors and non-survivors and provided additive diagnostic predictive accuracy in differentiating sepsis from non-infectious SIRS when integrated into a diagnostic prediction model including PCT and APACHE II. A sepsis biomarker strategy incorporating measures of the apoptotic pathway may serve as an important component of a sepsis diagnostic and mortality prediction tool.
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Affiliation(s)
- Christopher Duplessis
- 1Biological Defense Research Directorate, Naval Medical Research Center, 503 Robert Grant Avenue, Silver Spring, MD 20910 USA
| | - Michael Gregory
- 1Biological Defense Research Directorate, Naval Medical Research Center, 503 Robert Grant Avenue, Silver Spring, MD 20910 USA
| | - Kenneth Frey
- 1Biological Defense Research Directorate, Naval Medical Research Center, 503 Robert Grant Avenue, Silver Spring, MD 20910 USA
| | - Matthew Bell
- 1Biological Defense Research Directorate, Naval Medical Research Center, 503 Robert Grant Avenue, Silver Spring, MD 20910 USA
| | - Luu Truong
- 1Biological Defense Research Directorate, Naval Medical Research Center, 503 Robert Grant Avenue, Silver Spring, MD 20910 USA
| | - Kevin Schully
- 1Biological Defense Research Directorate, Naval Medical Research Center, 503 Robert Grant Avenue, Silver Spring, MD 20910 USA
| | - James Lawler
- 1Biological Defense Research Directorate, Naval Medical Research Center, 503 Robert Grant Avenue, Silver Spring, MD 20910 USA
| | - Raymond J Langley
- 2Department of Pharmacology and Center for Lung Biology, University of South Alabama College of Medicine, Mobile, USA
| | - Stephen F Kingsmore
- 3Rady Pediatric Genomic and Systems Medicine Institute, Rady Children's Hospital, Encinitas, USA
| | - Christopher W Woods
- 4Division of Infectious Diseases and International Health, Department of Medicine, Duke University School of Medicine, Durham, USA.,5Center for Applied Genomics and Precision Medicine, Department of Medicine, Duke University School of Medicine, Durham, USA.,6Section on Infectious Diseases, Durham Veteran's Affairs Medical Center, Durham, USA
| | - Emanuel P Rivers
- 7Department of Emergency Medicine, Henry Ford Hospital, Wayne State University, Detroit, USA
| | - Anja K Jaehne
- 7Department of Emergency Medicine, Henry Ford Hospital, Wayne State University, Detroit, USA
| | - Eugenia B Quackenbush
- 8Department of Emergency Medicine, University of North Carolina Health Care, Chapel Hill, USA
| | - Vance G Fowler
- 4Division of Infectious Diseases and International Health, Department of Medicine, Duke University School of Medicine, Durham, USA
| | - Ephraim L Tsalik
- 4Division of Infectious Diseases and International Health, Department of Medicine, Duke University School of Medicine, Durham, USA.,5Center for Applied Genomics and Precision Medicine, Department of Medicine, Duke University School of Medicine, Durham, USA.,9Emergency Medicine Service, Durham Veteran's Affairs Medical Center, Durham, USA
| | - Danielle Clark
- 1Biological Defense Research Directorate, Naval Medical Research Center, 503 Robert Grant Avenue, Silver Spring, MD 20910 USA
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18
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Kuspinar A, Verschoor C, Beauchamp M, Gregory M, Richardson J, Vrkljan B. LIFE-SPACE MOBILITY IN THE CANADIAN LONGITUDINAL STUDY ON AGING: A MULTI-DISCIPLINARY PERSPECTIVE. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.3181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | | | | | - M Gregory
- School of Rehabilitation Science, McMaster University
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19
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Lopez P, Gregory M, Miller K, Fuhrman K, Ray K, Hinerfeld D. Cross platform validation of a unique method for deep genomic and proteomic analysis of rare immune cell populations. The Journal of Immunology 2018. [DOI: 10.4049/jimmunol.200.supp.120.24] [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] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
Advances in flow and mass cytometry expand the number of cell parameters that can be interrogated improving our understanding of the myriad immune cell types. These technologies, however, are limited in the types of analytes profiled in a single sample. In addition to efforts to understand the immune system for the treatment of autoimmune diseases, the immune system is increasingly a target for cancer therapeutics. These efforts require deep characterization to understand rare cell populations, requiring next-generation methods that expand on flow cytometry.
3D Flow™ Analysis integrates flow cytometry cell sorting and the nCounter® Vantage 3D™ RNA:Protein Immune Cell Profiling Assay* to characterize sorted immune cell populations with direct digital counting of 770 RNA and 30 proteins. To determine if the method is agnostic to the cell sorting technology used, 3D Flow analysis was run with the Becton Dickenson FACSARIA IIu, Sony SH800z, and Beckman Coulter MoFloXDP. Stimulated and unstimulated PBMC were co-stained with flow antibodies for CD3, CD8, and CD4 plus 30 DNA-labeled antibodies for NanoString readout. 5,000 CD3+/CD4+ and CD3+/CD8+ cells were sorted on each platform and immediately lysed to release cellular RNA and DNA tags from NanoString antibodies. RNA and DNA tags were directly hybridized to NanoString barcodes and run on the nCounter system.
Expression of 30 proteins and 770 RNA across cell populations correlated between the three sorting platforms, showing 3D Flow is agnostic to the sorting technology used. Importantly, high-plex RNA data was obtained without additional molecular biology methods, such as RNA purification or library construction, simplifying incorporation into a flow cytometry laboratory.
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20
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Verdú-Ricoy J, Matla T, Gregory M, Lambiris A, Jordaan A, Zhao Z, Heideman N. A comparative analysis of testicular sperm morphology in fossorial and surface-living skinks in South Africa. ACTA ZOOL-STOCKHOLM 2018. [DOI: 10.1111/azo.12249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Joaquín Verdú-Ricoy
- Department of Zoology & Entomology; University of the Free State; Bloemfontein South Africa
| | - Tankiso Matla
- Department of Zoology & Entomology; University of the Free State; Bloemfontein South Africa
| | | | | | - Adriaan Jordaan
- Department of Zoology & Entomology; University of the Free State; Bloemfontein South Africa
| | - Zhongning Zhao
- Department of Zoology & Entomology; University of the Free State; Bloemfontein South Africa
| | - Neil Heideman
- Department of Zoology & Entomology; University of the Free State; Bloemfontein South Africa
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21
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Dawson N, Judge K, Gregory M. RESULTS OF A MODERATE-INTENSITY EXERCISE PROGRAM FOR IWDS: IMPLICATIONS AND FUTURE DIRECTIONS. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- N. Dawson
- University of Central Florida, Orlando, Florida,
| | - K.S. Judge
- Cleveland State University, Cleveland, Ohio
| | - M. Gregory
- University of Central Florida, Orlando, Florida,
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22
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Naidoo K, Chuturgoon A, Cliff G, Singh S, Ellis M, Otway N, Vosloo A, Gregory M. Possible maternal offloading of metals in the plasma, uterine and capsule fluid of pregnant ragged-tooth sharks (Carcharias taurus) on the east coast of South Africa. Environ Sci Pollut Res Int 2017; 24:16798-16805. [PMID: 28567684 DOI: 10.1007/s11356-017-9281-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 05/17/2017] [Indexed: 06/07/2023]
Abstract
We studied the possible metal offloading onto the progeny of three pregnant female ragged-tooth sharks (Carcharias taurus) (C. taurus). The presences of five metals, i.e. aluminium (Al), arsenic (As), cadmium (Cd), lead (Pb) and selenium (Se) were validated by mass spectrometry in the maternal plasma as well as the intracapsular and uterine fluids (UF) in which embryos develop. Metals were ranked in a decreasing concentration as follows: Plasma: As > Al > Se > Pb > Cd; ICF: As > Se > Al > Cd > Pb and UF: As > Se > Al > Cd > Pb. As was present in the highest concentration in all three sharks. Al, Pb and Cd were found to be the highest within the plasma, while concentrations of Se were similar in all three fluids. These results indicate that C. taurus embryos are exposed to metals during early development, but the impact of this exposure remains unknown. To the best of our knowledge, this is the first investigation to confirm the presence of metals in the fluids that surround the developing C. taurus embryos, a species that is already listed as vulnerable.
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Affiliation(s)
- Kristina Naidoo
- Discipline of Medical Biochemistry, University of KwaZulu-Natal (UKZN), Durban, South Africa
| | - Anil Chuturgoon
- Discipline of Medical Biochemistry, University of KwaZulu-Natal (UKZN), Durban, South Africa.
| | - Geremy Cliff
- KwaZulu-Natal Sharks Board (KZNSB), Umhlanga, South Africa
- Biomedical Resource Unit, University of KwaZulu-Natal (UKZN), Durban, South Africa
| | - Sanil Singh
- Biomedical Resource Unit, University of KwaZulu-Natal (UKZN), Durban, South Africa
| | - Megan Ellis
- Gladstone Ports Corporation, Gladstone, QLD, Australia
| | - Nicholas Otway
- New South Wales Department of Primary Industries, Port Stephens Fisheries Institute, Taylors Beach, NSW, Australia
| | - Andre Vosloo
- School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal (UKZN), Durban, South Africa
| | - Michael Gregory
- School of Health Sciences, University of KwaZulu-Natal (UKZN), Durban, South Africa
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23
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Harbi S, Park H, Gregory M, Lopez P, Chiriboga L, Mignatti P. Arrested Development: Infantile Hemangioma and the Stem Cell Teratogenic Hypothesis. Lymphat Res Biol 2017; 15:153-165. [PMID: 28520518 DOI: 10.1089/lrb.2016.0030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND Early-life programming is defined by the adaptive changes made by the fetus in response to an adverse in utero environment. Infantile hemangioma (IH), a vascular anomaly, is the most common tumor of infancy. Here we take IH as the tumor model to propose the stem cell teratogenic hypothesis of tumorigenesis and the potential involvement of the immune system. OBJECTIVES Teratogenic agents include chemicals, heavy metals, pathogens, and ionizing radiation. To investigate the etiology and pathogenesis of IH, we hypothesized that they result from a teratogenic mechanism. Immature, incompletely differentiated, dysregulated progenitor cells (multipotential stem cells) are arrested in development with vasculogenic, angiogenic, and tumorigenic potential due to exposure to teratogenic agents such as extrinsic factors that disrupt intrinsic factors via molecular mimicry. During the critical period of immunological tolerance, environmental exposure to immunotoxic agents may harness the teratogenic potential in the developing embryo or fetus and modify the early-life programming algorithm by altering normal fetal development, causing malformations, and inducing tumorigenesis. Specifically, exposure to environmental agents may interfere with physiological signaling pathways and contribute to the generation of IH, by several mechanisms. DISCUSSION An adverse in utero environment no longer serves as a sustainable environment for proper embryogenesis and normal development. Targeted disruption of stem cells by extrinsic factors can alter the genetic program. CONCLUSIONS This article offers new perspectives to stimulate discussion, explore novel experimental approaches (such as immunotoxicity/vasculotoxicity assays and novel isogenic models), and to address the questions raised to convert the hypotheses into nontoxic, noninvasive treatments.
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Affiliation(s)
| | - Hannah Park
- 2 Department of Epidemiology, University of California , Irvine, School of Medicine, Irvine, California
| | - Michael Gregory
- 3 Department of Pathology, New York University School of Medicine , New York, New York
| | - Peter Lopez
- 3 Department of Pathology, New York University School of Medicine , New York, New York
| | - Luis Chiriboga
- 3 Department of Pathology, New York University School of Medicine , New York, New York
| | - Paolo Mignatti
- 4 Department of Medicine, New York University School of Medicine , New York, New York.,5 Department of Cell Biology, New York University School of Medicine , New York, New York
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24
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Barsky LW, Black M, Cochran M, Daniel BJ, Davies D, DeLay M, Gardner R, Gregory M, Kunkel D, Lannigan J, Marvin J, Salomon R, Torres C, Walker R. International Society for Advancement of Cytometry (ISAC) flow cytometry shared resource laboratory (SRL) best practices. Cytometry A 2016; 89:1017-1030. [DOI: 10.1002/cyto.a.23016] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 10/07/2016] [Accepted: 10/11/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Lora W. Barsky
- Department of Medicine; University of Southern California; Los Angeles California
| | - Michele Black
- Department of Immunology; University of Washington; Seattle Washington
| | - Matthew Cochran
- Flow Cytometry Resource; University of Rochester Medical Center; Rochester New York
| | - Benjamin J. Daniel
- Department of Microbiology and Immunology; University of Texas HSC; San Antonio Texas
| | - Derek Davies
- Flow Cytometry Facility; Francis Crick Institute; London United Kingdom
| | - Monica DeLay
- Division of Rheumatology; Cincinnati Children's Hospital; Cincinnati Ohio
| | - Rui Gardner
- Flow Cytometry SRL; Instituto Gulbenkian Ciencia; Oeiras Portugal
| | - Michael Gregory
- New York University Langone Medical Center, Office of Collaborative Science; New York New York
| | - Desiree Kunkel
- BCRT Flow Cytometry Lab; Berlin-Brandenburg Center for Regenerative Therapies; Berlin Germany
| | - Joanne Lannigan
- University of Virginia School of Medicine; Flow Cytometry Shared Resource Lab; Charlottesville Virginia
| | - James Marvin
- Department of Health Sciences; University of Utah; Salt Lake City Utah
| | | | | | - Rachael Walker
- Flow Cytometry Core Facility; Babraham Institute; Cambridge United Kingdom
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25
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Harbi S, Wang R, Gregory M, Hanson N, Kobylarz K, Ryan K, Deng Y, Lopez P, Chiriboga L, Mignatti P. Infantile Hemangioma Originates From A Dysregulated But Not Fully Transformed Multipotent Stem Cell. Sci Rep 2016; 6:35811. [PMID: 27786256 PMCID: PMC5081534 DOI: 10.1038/srep35811] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 10/05/2016] [Indexed: 12/11/2022] Open
Abstract
Infantile hemangioma (IH) is the most common tumor of infancy. Its cellular origin and biological signals for uncontrolled growth are poorly understood, and specific pharmacological treatment is unavailable. To understand the process of hemangioma-genesis we characterized the progenitor hemangioma-derived stem cell (HemSC) and its lineage and non-lineage derivatives. For this purpose we performed a high-throughput (HT) phenotypic and gene expression analysis of HemSCs, and analyzed HemSC-derived tumorspheres. We found that IH is characterized by high expression of genes involved in vasculogenesis, angiogenesis, tumorigenesis and associated signaling pathways. These results show that IH derives from a dysregulated stem cell that remains in an immature, arrested stage of development. The potential biomarkers we identified can afford the development of diagnostic tools and precision-medicine therapies to "rewire" or redirect cellular transitions at an early stage, such as signaling pathways or immune response modifiers.
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Affiliation(s)
- Shaghayegh Harbi
- Department of Medicine, New York University School of Medicine, 550 First Avenue New York, NY 10016, USA
- VasculoTox Inc., New York, NY 10001, USA
| | - Rong Wang
- Department of Neurosurgery, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Michael Gregory
- Department of Pathology, New York University School of Medicine, 550 First Avenue New York, NY 10016, USA
| | - Nicole Hanson
- Department of Pathology, New York University School of Medicine, 550 First Avenue New York, NY 10016, USA
| | - Keith Kobylarz
- Department of Pathology, New York University School of Medicine, 550 First Avenue New York, NY 10016, USA
- Pfizer Inc., Pearl River, NY 10965, USA
| | - Kamilah Ryan
- Department of Pathology, New York University School of Medicine, 550 First Avenue New York, NY 10016, USA
| | - Yan Deng
- Department of Pathology, New York University School of Medicine, 550 First Avenue New York, NY 10016, USA
| | - Peter Lopez
- Department of Pathology, New York University School of Medicine, 550 First Avenue New York, NY 10016, USA
| | - Luis Chiriboga
- Department of Pathology, New York University School of Medicine, 550 First Avenue New York, NY 10016, USA
| | - Paolo Mignatti
- Department of Medicine, New York University School of Medicine, 550 First Avenue New York, NY 10016, USA
- Department of Cell Biology, New York University School of Medicine, 550 First Avenue New York, NY 10016, USA
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Borges C, Dias A, Silva P, Silva R, Rosa J, Missassi G, Gregory M, Cyr D, Kempinas W. Betamethasone causes multigenerational reproductive impairment in male rats. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.07.557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Roman M, Gregory M, Thompson M, Majewski A, Addae-Boateng E, Thorpe J, Kapila R, Duffy J. P-241CAN BREATH HOLDING REFLECT PREOPERATIVE RISK OF PATIENTS UNDERGOING SURGICAL LUNG RESECTIONS? Interact Cardiovasc Thorac Surg 2016. [DOI: 10.1093/icvts/ivw260.238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Abstract
The insertion of exogenous genetic cargo into insects using transposable elements is a powerful research tool with potential applications in meeting food security and public health challenges facing humanity. piggyBac is the transposable element most commonly utilized for insect germline transformation. The described efficiency of this process is variable in the published literature, and a comprehensive review of transformation efficiency in insects is lacking. This study compared and contrasted all available published data with a comprehensive data set provided by a biotechnology group specializing in insect transformation. Based on analysis of these data, with particular focus on the more complete observational data from the biotechnology group, we designed a decision tool to aid researchers' decision-making when using piggyBac to transform insects by microinjection. A combination of statistical techniques was used to define appropriate summary statistics of piggyBac transformation efficiency by species and insect order. Publication bias was assessed by comparing the data sets. The bias was assessed using strategies co-opted from the medical literature. The work culminated in building the Goldilocks decision tool, a Markov-Chain Monte-Carlo simulation operated via a graphical interface and providing guidance on best practice for those seeking to transform insects using piggyBac.
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Affiliation(s)
- M Gregory
- Department of Zoology, University of Oxford, Oxford, UK
- Oxitec Ltd, Abingdon, UK
| | - L Alphey
- Department of Zoology, University of Oxford, Oxford, UK
- Oxitec Ltd, Abingdon, UK
- The Pirbright Institute, Pirbright, Surrey, UK
| | | | - S M Shimeld
- Department of Zoology, University of Oxford, Oxford, UK
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Buzzi A, Kelley L, Gregory M, Skinner M, Kalnins W. Improving comprehensive care in the haemophilia community: building on the HERO Study. Haemophilia 2016; 22:e320-2. [PMID: 27170451 DOI: 10.1111/hae.12945] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/18/2016] [Indexed: 11/27/2022]
Affiliation(s)
- A Buzzi
- Fondazione Paracelso, Milan, Italy
| | - L Kelley
- LA Kelley Communications, Inc., Georgetown, MA, USA
| | | | - M Skinner
- World Federation of Hemophilia, Washington, DC, USA
| | - W Kalnins
- German Haemophilia Society, Hamburg, Germany
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Gregory M. Developing a Patient Care Co-ordination Centre in Trafford, England: lessons from the International Foundation for Integrated Care (IFIC)/Advancing Quality Alliance integrated care fellowship experience. Int J Integr Care 2015; 15:e009. [PMID: 26034468 PMCID: PMC4447232 DOI: 10.5334/ijic.2030] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 03/03/2015] [Indexed: 11/20/2022] Open
Abstract
The NHS and Social Care in England are facing one of the biggest financial challenges for a generation. Commissioners and providers need to work on collaborative schemes to manage the increasing demand on health and social care within a period of financial constraint. Different forms of care co-ordination have been developed at different levels across the world. In the north-west of England, the Trafford health and social care economy have been working through a competitive dialogue process with industry to develop an innovative and dynamic solution to deliver seamless co-ordination for all patients and service users. The strategy is to develop a new Patient Care Co-ordination Centre, which will be responsible for the delivery of co-ordinated, quality care. The Patient Care Co-ordination Centre will work at clinical, service, functional and community levels across multiple providers covering risk stratification, preventative, elective and unscheduled care. I am the clinical lead for the Patient Care Co-ordination Centre and during my year as an Advancing Quality Alliance Integrated Care Fellow, I have had the opportunity to study examples of care coordination from UK and international sites. The learning from these visits has been assimilated into the design process of the Patient Care Co-ordination Centre.
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Yost G, Gregory M, Bhat G. Handgrip Strength Is a Predictor for Length of Stay in Patients Implanted With Left Ventricular Assist Devices. J Heart Lung Transplant 2015. [DOI: 10.1016/j.healun.2015.01.518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Nugent D, Kalnins W, Querol F, Gregory M, Pilgaard T, Cooper DL, Iorio A. Haemophilia Experiences, Results and Opportunities (HERO) study: treatment-related characteristics of the population. Haemophilia 2014; 21:e26-38. [PMID: 25377442 DOI: 10.1111/hae.12545] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/11/2014] [Indexed: 01/25/2023]
Abstract
The HERO (Haemophilia Experiences, Results and Opportunities) quantitative surveys collected information on characteristics and perceptions of adult persons with haemophilia (PWH) and parents of children with haemophilia. The aim of this article is to describe the perceptions of PWH and parents on psychosocial aspects related to treatment. Two online surveys (one for PWH, one for parents) were conducted in 10 countries. Among 675 PWH respondents, 77% reported having responsibility for their own care; 72% of 561 parent respondents had the main responsibility for their son. PWH were most commonly treated on demand (45% of 648 adults using factor concentrate), with 32% on regular prophylaxis and 23% treated on demand with short-term prophylaxis (e.g. for sports/physiotherapy). Children were most often treated with prophylaxis (65% of 549 children using factor concentrate), with 26% treated on demand and 8% treated on demand with short-term prophylaxis. Factor was generally used as instructed at home. Some respondents (41% PWH; 30% parents) had difficulties/concerns with factor availability/affordability. PWH reported more bleeds in the last 12 months than parents reporting their son's bleeds (mean 17.8 vs. 8.7). Both PWH and parents generally perceived that overall, their (their son's) haemophilia was well controlled. Results differed by country. The HERO study captured new, patient-based data regarding many facets of life relevant to PWH, including treatment. The information conveyed in this article largely represents new insights regarding perceptions of treatment and provides initial benchmark statistics for further research.
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Affiliation(s)
- D Nugent
- Children's Hospital of Orange County and Center for Inherited Blood Disorders, Orange, CA, USA
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Deane MN, Gregory M, Mars M. The creation of a measurable contusion injury in skeletal muscle. J S Afr Vet Assoc 2014; 85:1031. [PMID: 25686259 DOI: 10.4102/jsava.v85i1.1031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Revised: 08/29/2013] [Accepted: 02/07/2014] [Indexed: 11/01/2022] Open
Abstract
The effect that compressed air massage (CAM) has on skeletal muscle has been ascertained by the morphological and morphometric evaluation of healthy vervet monkey and rabbit skeletal muscle. How CAM may influence the process of healing following a contusion injury is not known. To determine how CAM or other physiotherapeutic modalities may influence healing, it is necessary to create a minor injury that is both reproducible and quantifiable at the termination of a pre-determined healing period. An earlier study described changes in the morphology of skeletal muscle following a reproducible contusion injury. This study extended that work in that it attempted to quantify the 'severity' of such an injury. A 201 g, elongated oval-shaped weight was dropped seven times through a 1 m tube onto the left vastus lateralis muscle of four New Zealand white rabbits. Biopsies were obtained 6 days after injury from the left healing juxta-bone and sub-dermal muscle and uninjured (control) right vastus lateralis of each animal. The tissue was fixed in formal saline, embedded in wax, cut and stained with haematoxylin and phosphotungstic haematoxylin. The muscle was examined by light microscopy and quantification of the severity of injury made using a modified, 'in-house' morphological index and by the comparative morphometric measurement of the cross-sectioned epimysium and myofibres in injured and control muscle. The results showed that a single contusion causes multiple, quantifiable degrees of injury from skin to bone - observations of particular importance to others wishing to investigate contusion injury in human or animal models.
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Cassis FRMY, Buzzi A, Forsyth A, Gregory M, Nugent D, Garrido C, Pilgaard T, Cooper DL, Iorio A. Haemophilia Experiences, Results and Opportunities (HERO) Study: influence of haemophilia on interpersonal relationships as reported by adults with haemophilia and parents of children with haemophilia. Haemophilia 2014; 20:e287-95. [PMID: 24800872 DOI: 10.1111/hae.12454] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/07/2014] [Indexed: 12/01/2022]
Abstract
Evidence delineating the effects of haemophilia on interpersonal relationships is sparse and largely outdated, failing to reflect the impact of current treatment strategies. HERO (Haemophilia Experiences, Results and Opportunities) was commenced to garner a more comprehensive understanding of psychosocial issues facing persons with haemophilia (PWH). This article describes the findings of the quantitative HERO survey relating to the influence of haemophilia on interpersonal relationships of adult PWH, and parents/caregivers of children with haemophilia. Separate questionnaires were completed by adult PWH and parents of minor children from 10 countries, including satisfaction with support from partners, family, friends and other social contacts; disclosure of haemophilia and carrier status and family dynamics. A total of 675 PWH and 561 parents completed the survey. Over half of PWH (57%) and parents (84%) were married. Most PWH were satisfied with support from partners (94%), family (90%) and friends (85%), with lower percentages reported among those with inhibitors. Most parents were likewise satisfied with support from partners (88%) and family (83%). Whereas PWH were reticent to disclose their diagnosis beyond family and friends, parents were more likely to share their son's diagnosis, and most were satisfied with the support from their son's peers (74%), teachers (83%) and other adults in supervisory roles (85%). PWH and parents surveyed were satisfied overall with the support they received from partners, family, friends and social contacts. Relationships are affected by haemophilia in various ways, and particularly affected in terms of disease burden, age and social life.
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Affiliation(s)
- F R M Y Cassis
- Hemophilia Center, University of São Paulo Faculty of Medicine Clinics Hospital, São Paulo, Brazil
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Canal E, Pollett S, Heitzinger K, Gregory M, Kasper M, Halsey E, Meza Y, Campos K, Perez J, Meza R, Bernal M, Guillen A, Kochel TJ, Espinosa B, Hall ER, Maves RC. Detection of human leptospirosis as a cause of acute fever by capture ELISA using a Leptospira interrogans serovar Copenhageni (M20) derived antigen. BMC Infect Dis 2013; 13:438. [PMID: 24053555 PMCID: PMC3848998 DOI: 10.1186/1471-2334-13-438] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Accepted: 08/27/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Leptospirosis is a potentially lethal zoonosis mainly affecting low-resource tropical countries, including Peru and its neighbouring countries. Timely diagnosis of leptospirosis is critical but may be challenging in the regions where it is most prevalent. The serodiagnostic gold standard microagglutination test (MAT) may be technically prohibitive. Our objective in this study was to assess the sensitivity, specificity, and predictive value of an IgM antibody capture enzyme-linked immunoassay (MAC-ELISA) derived from the M20 strain of Leptospira interrogans serovar Copenhageni (M20) by comparison to MAT, which was used as the gold standard method of diagnosis. METHODS Acute and convalescent sera from participants participating in a passive febrile surveillance study in multiple regions of Peru were tested by both IgM MAC-ELISA and MAT. The sensitivity, specificity, positive and negative predictive value (PPV, NPV) of the MAC-ELISA assay for acute, convalescent and paired sera by comparison to MAT were calculated. RESULTS The sensitivity, specificity, PPV and NPV of the MAC-ELISA assay for acute sera were 92.3%, 56.0%, 35.3% and 96.6% respectively. For convalescent sera, the sensitivity, specificity, PPV and NPV of the MAC-ELISA assay were 93.3%, 51.5%, 63.6% and 89.5% respectively. For paired sera, the sensitivity, specificity, PPV and NPV of the MAC-ELISA assay were 93.6%, 37.5%, 59.2%, 85.7% respectively. CONCLUSIONS The M20 MAC-ELISA assay performed with a high sensitivity and low specificity in the acute phase of illness. Sensitivity was similar as compared with MAT in the convalescent phase and specificity remained low. Paired sera were the most sensitive but least specific by comparison to MAT serodiagnosis. NPV for acute, convalescent and paired sera was high. The limited specificity and high sensitivity of the MAC-ELISA IgM suggests that it would be most valuable to exclude leptospirosis in low-resource regions that lack immediate access to definitive reference laboratory techniques such as MAT.
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Deane MN, Gregory M, Mars M, Bester L. Creation of a contusion injury in rabbit skeletal muscle using a drop-mass technique. J S Afr Vet Assoc 2013. [DOI: 10.4102/jsava.v84i1.957] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
This study reports our experience in developing a simple, minor injury. After reviewing the literature, a ‘drop-mass’ method was selected where a 201 g, elongated oval-shaped weight was dropped up to 15 times through a 1 m tube onto the left vastus lateralis of New Zealand white rabbits. To determine the extent of injury and degree of healing, biopsies were obtained six days after injury from the healing vastus lateralis of each animal. The tissue was fixed in formal saline, embedded in wax, cut and stained with haematoxylin and eosin (HE) and phosphotungstic acid haematoxylin (PTAH) and examined by light microscopy (LM). The ‘optimal’ injury was created after seven drops, where quite severe, mild and moderately severe trauma was caused to muscle in the juxta-bone, mid and sub-dermal regions respectively. In each region, the muscle exhibited features of healing six days after injury. The ‘drop-mass’ technique appears to cause a contusion within a single muscle of at least three degrees of severity. This previously unreported observation is of particular importance to other researchers wishing to investigate contusion injury in other animal models.
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Forsyth AL, Gregory M, Nugent D, Garrido C, Pilgaard T, Cooper DL, Iorio A. Haemophilia Experiences, Results and Opportunities (HERO) Study: survey methodology and population demographics. Haemophilia 2013; 20:44-51. [DOI: 10.1111/hae.12239] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/28/2013] [Indexed: 11/30/2022]
Affiliation(s)
- A. L. Forsyth
- RUSH Hemophilia and Thrombophilia Center; Chicago IL USA
| | | | - D. Nugent
- Children's Hospital of Orange County; Orange CA USA
| | - C. Garrido
- Asociación Venezolana para la Hemofilia; Caracas Venezuela
| | | | | | - A. Iorio
- Health Information Research Unit; Department of Clinical Epidemiology and Biostatistics, and Haemophilia Clinic; Department of Medicine; McMaster University; Hamilton ON Canada
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Gill D, Koblinsky N, Gregory M, Morton H, Fitzgerald C, Petrella R. P2–331: Preliminary findings from a 6‐month randomized controlled trial of combined dual‐task gait training and aerobic exercise in older adults with cognitive impairment but no dementia. Alzheimers Dement 2013. [DOI: 10.1016/j.jalz.2013.05.979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Dawn Gill
- Lawson Health Research Institute & University of Washington London Ontario Canada
| | | | - Michael Gregory
- Western University/Lawson Health Research Institute London Ontario Canada
| | | | | | - Robert Petrella
- Western University & Lawson Health Research Institute London Ontario Canada
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Gregory M, Mak PJ, Sligar SG, Kincaid JR. Differential Hydrogen Bonding in Human CYP17 Dictates Hydroxylation versus Lyase Chemistry. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201300760] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [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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Gregory M, Mak PJ, Sligar SG, Kincaid JR. Differential hydrogen bonding in human CYP17 dictates hydroxylation versus lyase chemistry. Angew Chem Int Ed Engl 2013; 52:5342-5. [PMID: 23576395 DOI: 10.1002/anie.201300760] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Indexed: 11/06/2022]
Affiliation(s)
- Michael Gregory
- Department of Biochemistry, University of Illinois, Urbana, IL 61801, USA
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Lee G, Pan W, Peñataro Yori P, Paredes Olortegui M, Tilley D, Gregory M, Oberhelman R, Burga R, Chavez CB, Kosek M. Symptomatic and asymptomatic Campylobacter infections associated with reduced growth in Peruvian children. PLoS Negl Trop Dis 2013; 7:e2036. [PMID: 23383356 PMCID: PMC3561130 DOI: 10.1371/journal.pntd.0002036] [Citation(s) in RCA: 107] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 12/12/2012] [Indexed: 12/14/2022] Open
Abstract
Background Although diarrheal illnesses are recognized as both a cause and effect of undernutrition, evidence for the effect of specific enteropathogens on early childhood growth remains limited. We estimated the effects of undernutrition as a risk factor for campylobacteriosis, as well as associations between symptomatic and asymptomatic Campylobacter infections and growth. Methodology/Principal Findings Using data from a prospective cohort of 442 children aged 0–72 months, the effect of nutritional status on the incidence of Campylobacter infection was estimated using uni- and multivariate Poisson models. Multivariate regression models were developed to evaluate the effect of Campylobacter infection on weight gain and linear growth. Overall, 8.3% of diarrheal episodes were associated with Campylobacter (crude incidence rate = 0.37 episodes/year) and 4.9% of quarterly asymptomatic samples were Campylobacter positive. In univariate models, the incidence of Campylobacter infection was marginally higher in stunted than non-stunted children (IRR 1.270, 95% CI (0.960, 1.681)(p = 0.095). When recent diarrheal burdens were included in the analysis, there was no difference in risk between stunted and unstunted children. Asymptomatic and symptomatic Campylobacter infections were associated with reduced weight gain over a three-month period (65.5 g (95% CI: −128.0, −3.0)(p = 0.040) and 43.9 g (95% CI:−87.6, −1.0)(p = 0.049) less weight gain, respectively). Symptomatic Campylobacter infections were only marginally associated with reduced linear growth over a nine month period (−0.059 cm per episode, 95% CI: −0.118, 0.001)(p = 0.054), however relatively severe episodes were associated with reduced linear growth (−0.169 cm/episode, 95% CI −0.310, −0.028)(p = 0.019). Conclusions/Significance Our findings suggest that Campylobacter is not as benign as commonly assumed, and that there is evidence to support expanding the indications for antibiotic therapy in campylobacteriosis in children. Campylobacter is a common cause of diarrheal disease among children at risk for growth failure in the developing world. We evaluated risk factors for Campylobacter infection as well as the association between symptomatic and asymptomatic Campylobacter infections and child growth over three and nine-month periods. Undernourished (stunted) children were more likely to experience a Campylobacter infection, but adjusting for a recent history of diarrheal disease attenuated this relationship. Both symptomatic and asymptomatic infections were associated with poorer weight gain and symptomatic Campylobacter infections were marginally associated with poorer linear growth on an order similar to what has been reported for other bacterial pathogens and less than what has been reported for some protozoal and parasitic infections. In a subset of severe infections that made up about twenty percent of total illnesses, the associations were poorer growth were of greater magnitude. Campylobacter infections are frequently viewed as benign, but our study suggests that this is not always the case. Rapid diagnostics for Campylobacter jejuni and coli could attenuate acquired linear growth deficits in populations where campylobacteriosis is highly endemic by facilitating improved case management.
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Affiliation(s)
- Gwenyth Lee
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America
| | - William Pan
- Duke Global Health Institute, Duke University, Durham, North Carolina, United States of America
| | - Pablo Peñataro Yori
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America
- Biomedical Research, Asociación Benéfica PRISMA, Iquitos, Peru
| | - Maribel Paredes Olortegui
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America
- Biomedical Research, Asociación Benéfica PRISMA, Iquitos, Peru
| | - Drake Tilley
- U.S. Naval Medical Research Unit Six, Lima, Peru
| | | | - Richard Oberhelman
- Department of Tropical Medicine, Tulane School of Public Health, New Orleans, Louisiana, United States of America
| | - Rosa Burga
- U.S. Naval Medical Research Unit Six, Lima, Peru
| | | | - Margaret Kosek
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America
- Biomedical Research, Asociación Benéfica PRISMA, Iquitos, Peru
- * E-mail:
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Abstract
Cytochromes P450 from eukaryotes and their native redox partners cytochrome P450 reductases both belong to the class of monotopic membrane proteins containing one transmembrane anchor. Incorporation into the lipid bilayer significantly affects their equilibrium and kinetic properties and plays an important role in their interactions. We describe here the detailed protocols developed in our group for the functional self-assembly of mammalian cytochromes P450 and cytochrome P450 reductases into Nanodiscs with controlled lipid composition. The resulting preparations are fully functional, homogeneous in size, composition and oligomerization state of the heme enzyme, and show an improved stability with respect to P420 formation. We provide a brief overview of applications of Nanodisc technology to the biophysical and biochemical mechanistic studies of cytochromes P450 involved in steroidogenesis, and of the most abundant xenobiotic-metabolizing human cytochrome P450 CYP3A4.
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Affiliation(s)
- A Luthra
- Department of Biochemistry, University of Illinois, Urbana, IL, USA
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Pollett S, Rocha C, Zerpa R, Patiño L, Valencia A, Camiña M, Guevara J, Lopez M, Chuquiray N, Salazar-Lindo E, Calampa C, Casapia M, Meza R, Bernal M, Tilley D, Gregory M, Maves R, Hall E, Jones F, Arriola CS, Rosenbaum M, Perez J, Kasper M. Campylobacter antimicrobial resistance in Peru: a ten-year observational study. BMC Infect Dis 2012; 12:193. [PMID: 22898609 PMCID: PMC3482591 DOI: 10.1186/1471-2334-12-193] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Accepted: 06/19/2012] [Indexed: 11/16/2022] Open
Abstract
Background Campylobacter jejuni and Campylobacter coli are food-borne pathogens of great importance and feature prominently in the etiology of developing world enteritis and travellers’ diarrhoea. Increasing antimicrobial resistant Campylobacter prevalence has been described globally, yet data from Peru is limited. Our objective was to describe the prevalence trends of fluoroquinolone and macrolide-resistant C. jejuni and C. coli stool isolates from three regions in Peru over a ten-year period. Methods Surveillance for enteric pathogens was conducted in Lima, Iquitos and Cusco between 2001 and 2010. Campylobacter stool isolates were tested for susceptibilities to ciprofloxacin, azithromycin and erythromycin. Susceptibilities were reviewed for 4652 isolates from Lima ( n = 3419), Iquitos ( n = 625) and Cusco ( n = 608). Results Comparing the study periods of 2001-2005 and 2006-2010, prevalence of ciprofloxacin-resistant C. jejuni isolates rose in the study areas of Lima (73.1% to 89.8%, p < 0.001) and Iquitos (24.1% to 48.9%, p < 0.001). Ciprofloxacin-resistant C. coli rates also increased in Lima (48.1% to 87.4%, p < 0.001) and Cusco (10.0% to 65.9%, p = 0.005). Small but significant increases in azithromycin-resistant and erythromycin-resistant C. jejuni prevalence were noted in Iquitos (2.2% to 14.9%, p < 0.001; 3.2% to 14.9%, p = 0.002), and erythromycin-resistant C. coli rates increased in Lima (0.0% to 5.3%, p = 0.038). The prevalence of C. jejuni isolates resistant to both ciprofloxacin and azithromycin increased in Iquitos (0.3% to 14.9%, p < 0.001) and Lima (0.3% to 1.6%, p = 0.011), and prevalence of C. jejuni isolates resistant to both ciprofloxacin and erythromycin rose in Iquitos (0.0% to 14.9%, p < 0.001). Ciprofloxacin and erythromycin resistant C. coli prevalence increased in Lima (0.0% to 5.3%, p = 0.034). Conclusions These results have implications for the empirical management of enterocolitis in Peru. Ongoing surveillance is essential to guide appropriate antimicrobial use in this setting. Local epidemiological studies to explore the relationship between increasing antimicrobial resistance and agricultural or human antibiotic use may be valuable.
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Affiliation(s)
- Simon Pollett
- Bacteriology Department, U.S. Naval Medical Research Unit-6 (NAMRU-6), Venezuela Ave, Block 36, Callao 2, Lima, Peru.
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Ritchie D, Gregory M, Betts T, Drummond S, Kincaid W, Roberts F, Kemp E, Cauchi P. PO-0949 AUDIT OF RUTHENIUM-106 BRACHYTHERAPY FOR POSTERIOR UVEAL MELANOMA IN THE SCOTTISH OPHTHALMIC ONCOLOGY SERVICE. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)71282-3] [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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Gregory M, Kahiri CN, Barr KJ, Smith CE, Hermo L, Cyr DG, Kidder GM. Male reproductive system defects and subfertility in a mutant mouse model of oculodentodigital dysplasia1. ACTA ACUST UNITED AC 2011; 34:e630-41. [DOI: 10.1111/j.1365-2605.2011.01224.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Money NN, Maves RC, Sebeny P, Kasper MR, Riddle MS, Wu M, Lee JE, Schnabel D, Bowden R, Oaks EV, Ocaña V, Acosta L, Gotuzzo E, Lanata C, Ochoa T, Aguayo N, Bernal M, Meza R, Canal E, Gregory M, Cepeda D, Listiyaningsih E, Putnam SD, Young S, Mansour A, Nakhla I, Moustafa M, Hassan K, Klena J, Bruton J, Shaheen H, Farid S, Fouad S, El-Mohamady H, Styles T, Shiau LCDRD, Espinosa B, McMullen K, Reed E, Neil D, Searles D, Nevin R, Von Thun A, Sessions C. Enteric disease surveillance under the AFHSC-GEIS: current efforts, landscape analysis and vision forward. BMC Public Health 2011; 11 Suppl 2:S7. [PMID: 21388567 PMCID: PMC3092417 DOI: 10.1186/1471-2458-11-s2-s7] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The mission of the Armed Forces Health Surveillance Center, Division of Global Emerging Infections Surveillance and Response System (AFHSC-GEIS) is to support global public health and to counter infectious disease threats to the United States Armed Forces, including newly identified agents or those increasing in incidence. Enteric diseases are a growing threat to U.S. forces, which must be ready to deploy to austere environments where the risk of exposure to enteropathogens may be significant and where routine prevention efforts may be impractical. In this report, the authors review the recent activities of AFHSC-GEIS partner laboratories in regards to enteric disease surveillance, prevention and response. Each partner identified recent accomplishments, including support for regional networks. AFHSC/GEIS partners also completed a Strengths, Weaknesses, Opportunities and Threats (SWOT) survey as part of a landscape analysis of global enteric surveillance efforts. The current strengths of this network include excellent laboratory infrastructure, equipment and personnel that provide the opportunity for high-quality epidemiological studies and test platforms for point-of-care diagnostics. Weaknesses include inconsistent guidance and a splintered reporting system that hampers the comparison of data across regions or longitudinally. The newly chartered Enterics Surveillance Steering Committee (ESSC) is intended to provide clear mission guidance, a structured project review process, and central data management and analysis in support of rationally directed enteric disease surveillance efforts.
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Affiliation(s)
- Nisha N Money
- Armed Forces Health Surveillance Center, 503 Robert Grant Avenue, Silver Spring, MD 20910, USA
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Zhong Z, Carroll KD, Policarpio D, Osborn C, Gregory M, Bassi R, Jimenez X, Prewett M, Liebisch G, Persaud K, Burtrum D, Wang S, Surguladze D, Ng S, Griffith H, Balderes P, Doody J, Schwartz JD, Youssoufian H, Rowinsky EK, Ludwig DL, Witte L, Zhu Z, Wu Y. Anti-transforming growth factor beta receptor II antibody has therapeutic efficacy against primary tumor growth and metastasis through multieffects on cancer, stroma, and immune cells. Clin Cancer Res 2010; 16:1191-205. [PMID: 20145179 DOI: 10.1158/1078-0432.ccr-09-1634] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Transforming growth factor beta (TGFbeta) is a pleiotropic cytokine that affects tumor growth, metastasis, stroma, and immune response. We investigated the therapeutic efficacy of anti-TGFbeta receptor II (TGFbeta RII) antibody in controlling metastasis and tumor growth as well as enhancing antitumor immunity in preclinical tumor models. EXPERIMENTAL DESIGN We generated neutralizing antibodies to TGFbeta RII and assessed the antibody effects on cancer, stroma, and immune cells in vitro. The efficacy and mechanism of action of the antibody as monotherapy and in combination with chemotherapy in suppression of primary tumor growth and metastasis were evaluated in several tumor models. RESULTS Anti-TGFbeta RII antibody blocked TGFbeta RII binding to TGFbeta 1, 2, and 3, and attenuated the TGFbeta-mediated activation of downstream Smad2 kinase, invasion of cancer cells, motility of endothelial and fibroblast cells, and induction of immunosuppressive cells. Treatment with the antibody significantly suppressed primary tumor growth and metastasis and enhanced natural killer and CTL activity in tumor-bearing mice. Immunohistochemistry analysis showed cancer cell apoptosis and massive necrosis, and increased tumor-infiltrating T effector cells and decreased tumor-infiltrating Gr-1+ myeloid cells in the antibody-treated tumors. Fluorescence-activated cell sorting analysis indicated the significant reduction of peripheral Gr-1+/CD11b+ myeloid cells in treated animals. Concomitant treatment with the cytotoxic agent cyclophosphamide resulted in a significantly increased antitumor efficacy against primary tumor growth and metastasis. CONCLUSIONS These preclinical data provide a foundation to support using anti-TGFbeta RII antibody as a therapeutic agent for TGFbeta RII-dependent cancer with metastatic capacity.
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Affiliation(s)
- Zhaojing Zhong
- Department of Antibody Technology & Immunology, Clinical Research, and Research, ImClone Systems, New York, New York 10014, USA
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Pusic I, Kymes S, Lambert D, Gregory M, DiPersio J. Health Economic Outcome Analysis Of Stem Cell Mobilization With Granulocyte Colony-Stimulating Factor (G-CSF) Plus Plerixafor Versus G-CSF Alone In Preparation For Autologous Stem Cell Transplantation (ASCT) In Patients With Non-Hodgkin's Lymphomas (NHL). Biol Blood Marrow Transplant 2010. [DOI: 10.1016/j.bbmt.2009.12.177] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Herbert A, Gregory M, Gupta SS, Singh N. Invasive cervical cancer audit: a relative increase in interval cancers while coverage increased and incidence declined. BJOG 2009; 116:845-53. [DOI: 10.1111/j.1471-0528.2008.01990.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Herbert A, Gregory M, Gupta SS, Singh N. Screen-detected invasive cervical carcinoma and its clinical significance during the introduction of organized screening. BJOG 2009; 116:854-9. [DOI: 10.1111/j.1471-0528.2008.01989.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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